diff options
46 files changed, 2533 insertions, 2684 deletions
diff --git a/Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt b/Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt index 63a4892..b152a75 100644 --- a/Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt +++ b/Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt @@ -2,9 +2,10 @@ Texas Instruments DMA Crossbar (DMA request router) Required properties: - compatible: "ti,dra7-dma-crossbar" for DRA7xx DMA crossbar + "ti,am335x-edma-crossbar" for AM335x and AM437x - reg: Memory map for accessing module -- #dma-cells: Should be set to <1>. - Clients should use the crossbar request number (input) +- #dma-cells: Should be set to to match with the DMA controller's dma-cells + for ti,dra7-dma-crossbar and <3> for ti,am335x-edma-crossbar. - dma-requests: Number of DMA requests the crossbar can receive - dma-masters: phandle pointing to the DMA controller @@ -14,6 +15,15 @@ The DMA controller node need to have the following poroperties: Optional properties: - ti,dma-safe-map: Safe routing value for unused request lines +Notes: +When requesting channel via ti,dra7-dma-crossbar, the DMA clinet must request +the DMA event number as crossbar ID (input to the DMA crossbar). + +For ti,am335x-edma-crossbar: the meaning of parameters of dmas for clients: +dmas = <&edma_xbar 12 0 1>; where <12> is the DMA request number, <0> is the TC +the event should be assigned and <1> is the mux selection for in the crossbar. +When mux 0 is used the DMA channel can be requested directly from edma node. + Example: /* DMA controller */ @@ -47,6 +57,7 @@ uart1: serial@4806a000 { ti,hwmods = "uart1"; clock-frequency = <48000000>; status = "disabled"; + /* Requesting crossbar input 49 and 50 */ dmas = <&sdma_xbar 49>, <&sdma_xbar 50>; dma-names = "tx", "rx"; }; diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt index 5ba525a..d3d0a4f 100644 --- a/Documentation/devicetree/bindings/dma/ti-edma.txt +++ b/Documentation/devicetree/bindings/dma/ti-edma.txt @@ -1,4 +1,119 @@ -TI EDMA +Texas Instruments eDMA + +The eDMA3 consists of two components: Channel controller (CC) and Transfer +Controller(s) (TC). The CC is the main entry for DMA users since it is +responsible for the DMA channel handling, while the TCs are responsible to +execute the actual DMA tansfer. + +------------------------------------------------------------------------------ +eDMA3 Channel Controller + +Required properties: +- compatible: "ti,edma3-tpcc" for the channel controller(s) +- #dma-cells: Should be set to <2>. The first number is the DMA request + number and the second is the TC the channel is serviced on. +- reg: Memory map of eDMA CC +- reg-names: "edma3_cc" +- interrupts: Interrupt lines for CCINT, MPERR and CCERRINT. +- interrupt-names: "edma3_ccint", "emda3_mperr" and "edma3_ccerrint" +- ti,tptcs: List of TPTCs associated with the eDMA in the following form: + <&tptc_phandle TC_priority_number>. The highest priority is 0. + +Optional properties: +- ti,hwmods: Name of the hwmods associated to the eDMA CC +- ti,edma-memcpy-channels: List of channels allocated to be used for memcpy, iow + these channels will be SW triggered channels. The list must + contain 16 bits numbers, see example. +- ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by + the driver, they are allocated to be used by for example the + DSP. See example. + +------------------------------------------------------------------------------ +eDMA3 Transfer Controller + +Required properties: +- compatible: "ti,edma3-tptc" for the transfer controller(s) +- reg: Memory map of eDMA TC +- interrupts: Interrupt number for TCerrint. + +Optional properties: +- ti,hwmods: Name of the hwmods associated to the given eDMA TC +- interrupt-names: "edma3_tcerrint" + +------------------------------------------------------------------------------ +Example: + +edma: edma@49000000 { + compatible = "ti,edma3-tpcc"; + ti,hwmods = "tpcc"; + reg = <0x49000000 0x10000>; + reg-names = "edma3_cc"; + interrupts = <12 13 14>; + interrupt-names = "edma3_ccint", "emda3_mperr", "edma3_ccerrint"; + dma-requests = <64>; + #dma-cells = <2>; + + ti,tptcs = <&edma_tptc0 7>, <&edma_tptc1 7>, <&edma_tptc2 0>; + + /* Channel 20 and 21 is allocated for memcpy */ + ti,edma-memcpy-channels = /bits/ 16 <20 21>; + /* The following PaRAM slots are reserved: 35-45 and 100-110 */ + ti,edma-reserved-slot-ranges = /bits/ 16 <35 10>, + /bits/ 16 <100 10>; +}; + +edma_tptc0: tptc@49800000 { + compatible = "ti,edma3-tptc"; + ti,hwmods = "tptc0"; + reg = <0x49800000 0x100000>; + interrupts = <112>; + interrupt-names = "edm3_tcerrint"; +}; + +edma_tptc1: tptc@49900000 { + compatible = "ti,edma3-tptc"; + ti,hwmods = "tptc1"; + reg = <0x49900000 0x100000>; + interrupts = <113>; + interrupt-names = "edm3_tcerrint"; +}; + +edma_tptc2: tptc@49a00000 { + compatible = "ti,edma3-tptc"; + ti,hwmods = "tptc2"; + reg = <0x49a00000 0x100000>; + interrupts = <114>; + interrupt-names = "edm3_tcerrint"; +}; + +sham: sham@53100000 { + compatible = "ti,omap4-sham"; + ti,hwmods = "sham"; + reg = <0x53100000 0x200>; + interrupts = <109>; + /* DMA channel 36 executed on eDMA TC0 - low priority queue */ + dmas = <&edma 36 0>; + dma-names = "rx"; +}; + +mcasp0: mcasp@48038000 { + compatible = "ti,am33xx-mcasp-audio"; + ti,hwmods = "mcasp0"; + reg = <0x48038000 0x2000>, + <0x46000000 0x400000>; + reg-names = "mpu", "dat"; + interrupts = <80>, <81>; + interrupt-names = "tx", "rx"; + status = "disabled"; + /* DMA channels 8 and 9 executed on eDMA TC2 - high priority queue */ + dmas = <&edma 8 2>, + <&edma 9 2>; + dma-names = "tx", "rx"; +}; + +------------------------------------------------------------------------------ +DEPRECATED binding, new DTS files must use the ti,edma3-tpcc/ti,edma3-tptc +binding. Required properties: - compatible : "ti,edma3" diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index f1ed110..9246bd7 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -737,7 +737,6 @@ config ARCH_DAVINCI select GENERIC_CLOCKEVENTS select GENERIC_IRQ_CHIP select HAVE_IDE - select TI_PRIV_EDMA select USE_OF select ZONE_DMA help diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig index c3a4e9c..9353184 100644 --- a/arch/arm/common/Kconfig +++ b/arch/arm/common/Kconfig @@ -17,6 +17,3 @@ config SHARP_PARAM config SHARP_SCOOP bool - -config TI_PRIV_EDMA - bool diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile index 6ee5959..27f23b1 100644 --- a/arch/arm/common/Makefile +++ b/arch/arm/common/Makefile @@ -15,6 +15,5 @@ obj-$(CONFIG_MCPM) += mcpm_head.o mcpm_entry.o mcpm_platsmp.o vlock.o CFLAGS_REMOVE_mcpm_entry.o = -pg AFLAGS_mcpm_head.o := -march=armv7-a AFLAGS_vlock.o := -march=armv7-a -obj-$(CONFIG_TI_PRIV_EDMA) += edma.o obj-$(CONFIG_BL_SWITCHER) += bL_switcher.o obj-$(CONFIG_BL_SWITCHER_DUMMY_IF) += bL_switcher_dummy_if.o diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c deleted file mode 100644 index 873dbfc..0000000 --- a/arch/arm/common/edma.c +++ /dev/null @@ -1,1876 +0,0 @@ -/* - * EDMA3 support for DaVinci - * - * Copyright (C) 2006-2009 Texas Instruments. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ -#include <linux/err.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/slab.h> -#include <linux/edma.h> -#include <linux/dma-mapping.h> -#include <linux/of_address.h> -#include <linux/of_device.h> -#include <linux/of_dma.h> -#include <linux/of_irq.h> -#include <linux/pm_runtime.h> - -#include <linux/platform_data/edma.h> - -/* Offsets matching "struct edmacc_param" */ -#define PARM_OPT 0x00 -#define PARM_SRC 0x04 -#define PARM_A_B_CNT 0x08 -#define PARM_DST 0x0c -#define PARM_SRC_DST_BIDX 0x10 -#define PARM_LINK_BCNTRLD 0x14 -#define PARM_SRC_DST_CIDX 0x18 -#define PARM_CCNT 0x1c - -#define PARM_SIZE 0x20 - -/* Offsets for EDMA CC global channel registers and their shadows */ -#define SH_ER 0x00 /* 64 bits */ -#define SH_ECR 0x08 /* 64 bits */ -#define SH_ESR 0x10 /* 64 bits */ -#define SH_CER 0x18 /* 64 bits */ -#define SH_EER 0x20 /* 64 bits */ -#define SH_EECR 0x28 /* 64 bits */ -#define SH_EESR 0x30 /* 64 bits */ -#define SH_SER 0x38 /* 64 bits */ -#define SH_SECR 0x40 /* 64 bits */ -#define SH_IER 0x50 /* 64 bits */ -#define SH_IECR 0x58 /* 64 bits */ -#define SH_IESR 0x60 /* 64 bits */ -#define SH_IPR 0x68 /* 64 bits */ -#define SH_ICR 0x70 /* 64 bits */ -#define SH_IEVAL 0x78 -#define SH_QER 0x80 -#define SH_QEER 0x84 -#define SH_QEECR 0x88 -#define SH_QEESR 0x8c -#define SH_QSER 0x90 -#define SH_QSECR 0x94 -#define SH_SIZE 0x200 - -/* Offsets for EDMA CC global registers */ -#define EDMA_REV 0x0000 -#define EDMA_CCCFG 0x0004 -#define EDMA_QCHMAP 0x0200 /* 8 registers */ -#define EDMA_DMAQNUM 0x0240 /* 8 registers (4 on OMAP-L1xx) */ -#define EDMA_QDMAQNUM 0x0260 -#define EDMA_QUETCMAP 0x0280 -#define EDMA_QUEPRI 0x0284 -#define EDMA_EMR 0x0300 /* 64 bits */ -#define EDMA_EMCR 0x0308 /* 64 bits */ -#define EDMA_QEMR 0x0310 -#define EDMA_QEMCR 0x0314 -#define EDMA_CCERR 0x0318 -#define EDMA_CCERRCLR 0x031c -#define EDMA_EEVAL 0x0320 -#define EDMA_DRAE 0x0340 /* 4 x 64 bits*/ -#define EDMA_QRAE 0x0380 /* 4 registers */ -#define EDMA_QUEEVTENTRY 0x0400 /* 2 x 16 registers */ -#define EDMA_QSTAT 0x0600 /* 2 registers */ -#define EDMA_QWMTHRA 0x0620 -#define EDMA_QWMTHRB 0x0624 -#define EDMA_CCSTAT 0x0640 - -#define EDMA_M 0x1000 /* global channel registers */ -#define EDMA_ECR 0x1008 -#define EDMA_ECRH 0x100C -#define EDMA_SHADOW0 0x2000 /* 4 regions shadowing global channels */ -#define EDMA_PARM 0x4000 /* 128 param entries */ - -#define PARM_OFFSET(param_no) (EDMA_PARM + ((param_no) << 5)) - -#define EDMA_DCHMAP 0x0100 /* 64 registers */ - -/* CCCFG register */ -#define GET_NUM_DMACH(x) (x & 0x7) /* bits 0-2 */ -#define GET_NUM_PAENTRY(x) ((x & 0x7000) >> 12) /* bits 12-14 */ -#define GET_NUM_EVQUE(x) ((x & 0x70000) >> 16) /* bits 16-18 */ -#define GET_NUM_REGN(x) ((x & 0x300000) >> 20) /* bits 20-21 */ -#define CHMAP_EXIST BIT(24) - -#define EDMA_MAX_DMACH 64 -#define EDMA_MAX_PARAMENTRY 512 - -/*****************************************************************************/ - -static void __iomem *edmacc_regs_base[EDMA_MAX_CC]; - -static inline unsigned int edma_read(unsigned ctlr, int offset) -{ - return (unsigned int)__raw_readl(edmacc_regs_base[ctlr] + offset); -} - -static inline void edma_write(unsigned ctlr, int offset, int val) -{ - __raw_writel(val, edmacc_regs_base[ctlr] + offset); -} -static inline void edma_modify(unsigned ctlr, int offset, unsigned and, - unsigned or) -{ - unsigned val = edma_read(ctlr, offset); - val &= and; - val |= or; - edma_write(ctlr, offset, val); -} -static inline void edma_and(unsigned ctlr, int offset, unsigned and) -{ - unsigned val = edma_read(ctlr, offset); - val &= and; - edma_write(ctlr, offset, val); -} -static inline void edma_or(unsigned ctlr, int offset, unsigned or) -{ - unsigned val = edma_read(ctlr, offset); - val |= or; - edma_write(ctlr, offset, val); -} -static inline unsigned int edma_read_array(unsigned ctlr, int offset, int i) -{ - return edma_read(ctlr, offset + (i << 2)); -} -static inline void edma_write_array(unsigned ctlr, int offset, int i, - unsigned val) -{ - edma_write(ctlr, offset + (i << 2), val); -} -static inline void edma_modify_array(unsigned ctlr, int offset, int i, - unsigned and, unsigned or) -{ - edma_modify(ctlr, offset + (i << 2), and, or); -} -static inline void edma_or_array(unsigned ctlr, int offset, int i, unsigned or) -{ - edma_or(ctlr, offset + (i << 2), or); -} -static inline void edma_or_array2(unsigned ctlr, int offset, int i, int j, - unsigned or) -{ - edma_or(ctlr, offset + ((i*2 + j) << 2), or); -} -static inline void edma_write_array2(unsigned ctlr, int offset, int i, int j, - unsigned val) -{ - edma_write(ctlr, offset + ((i*2 + j) << 2), val); -} -static inline unsigned int edma_shadow0_read(unsigned ctlr, int offset) -{ - return edma_read(ctlr, EDMA_SHADOW0 + offset); -} -static inline unsigned int edma_shadow0_read_array(unsigned ctlr, int offset, - int i) -{ - return edma_read(ctlr, EDMA_SHADOW0 + offset + (i << 2)); -} -static inline void edma_shadow0_write(unsigned ctlr, int offset, unsigned val) -{ - edma_write(ctlr, EDMA_SHADOW0 + offset, val); -} -static inline void edma_shadow0_write_array(unsigned ctlr, int offset, int i, - unsigned val) -{ - edma_write(ctlr, EDMA_SHADOW0 + offset + (i << 2), val); -} -static inline unsigned int edma_parm_read(unsigned ctlr, int offset, - int param_no) -{ - return edma_read(ctlr, EDMA_PARM + offset + (param_no << 5)); -} -static inline void edma_parm_write(unsigned ctlr, int offset, int param_no, - unsigned val) -{ - edma_write(ctlr, EDMA_PARM + offset + (param_no << 5), val); -} -static inline void edma_parm_modify(unsigned ctlr, int offset, int param_no, - unsigned and, unsigned or) -{ - edma_modify(ctlr, EDMA_PARM + offset + (param_no << 5), and, or); -} -static inline void edma_parm_and(unsigned ctlr, int offset, int param_no, - unsigned and) -{ - edma_and(ctlr, EDMA_PARM + offset + (param_no << 5), and); -} -static inline void edma_parm_or(unsigned ctlr, int offset, int param_no, - unsigned or) -{ - edma_or(ctlr, EDMA_PARM + offset + (param_no << 5), or); -} - -static inline void set_bits(int offset, int len, unsigned long *p) -{ - for (; len > 0; len--) - set_bit(offset + (len - 1), p); -} - -static inline void clear_bits(int offset, int len, unsigned long *p) -{ - for (; len > 0; len--) - clear_bit(offset + (len - 1), p); -} - -/*****************************************************************************/ - -/* actual number of DMA channels and slots on this silicon */ -struct edma { - /* how many dma resources of each type */ - unsigned num_channels; - unsigned num_region; - unsigned num_slots; - unsigned num_tc; - enum dma_event_q default_queue; - - /* list of channels with no even trigger; terminated by "-1" */ - const s8 *noevent; - - struct edma_soc_info *info; - - /* The edma_inuse bit for each PaRAM slot is clear unless the - * channel is in use ... by ARM or DSP, for QDMA, or whatever. - */ - DECLARE_BITMAP(edma_inuse, EDMA_MAX_PARAMENTRY); - - /* The edma_unused bit for each channel is clear unless - * it is not being used on this platform. It uses a bit - * of SOC-specific initialization code. - */ - DECLARE_BITMAP(edma_unused, EDMA_MAX_DMACH); - - unsigned irq_res_start; - unsigned irq_res_end; - - struct dma_interrupt_data { - void (*callback)(unsigned channel, unsigned short ch_status, - void *data); - void *data; - } intr_data[EDMA_MAX_DMACH]; -}; - -static struct edma *edma_cc[EDMA_MAX_CC]; -static int arch_num_cc; - -/* dummy param set used to (re)initialize parameter RAM slots */ -static const struct edmacc_param dummy_paramset = { - .link_bcntrld = 0xffff, - .ccnt = 1, -}; - -static const struct of_device_id edma_of_ids[] = { - { .compatible = "ti,edma3", }, - {} -}; - -/*****************************************************************************/ - -static void map_dmach_queue(unsigned ctlr, unsigned ch_no, - enum dma_event_q queue_no) -{ - int bit = (ch_no & 0x7) * 4; - - /* default to low priority queue */ - if (queue_no == EVENTQ_DEFAULT) - queue_no = edma_cc[ctlr]->default_queue; - - queue_no &= 7; - edma_modify_array(ctlr, EDMA_DMAQNUM, (ch_no >> 3), - ~(0x7 << bit), queue_no << bit); -} - -static void assign_priority_to_queue(unsigned ctlr, int queue_no, - int priority) -{ - int bit = queue_no * 4; - edma_modify(ctlr, EDMA_QUEPRI, ~(0x7 << bit), - ((priority & 0x7) << bit)); -} - -/** - * map_dmach_param - Maps channel number to param entry number - * - * This maps the dma channel number to param entry numberter. In - * other words using the DMA channel mapping registers a param entry - * can be mapped to any channel - * - * Callers are responsible for ensuring the channel mapping logic is - * included in that particular EDMA variant (Eg : dm646x) - * - */ -static void map_dmach_param(unsigned ctlr) -{ - int i; - for (i = 0; i < EDMA_MAX_DMACH; i++) - edma_write_array(ctlr, EDMA_DCHMAP , i , (i << 5)); -} - -static inline void -setup_dma_interrupt(unsigned lch, - void (*callback)(unsigned channel, u16 ch_status, void *data), - void *data) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(lch); - lch = EDMA_CHAN_SLOT(lch); - - if (!callback) - edma_shadow0_write_array(ctlr, SH_IECR, lch >> 5, - BIT(lch & 0x1f)); - - edma_cc[ctlr]->intr_data[lch].callback = callback; - edma_cc[ctlr]->intr_data[lch].data = data; - - if (callback) { - edma_shadow0_write_array(ctlr, SH_ICR, lch >> 5, - BIT(lch & 0x1f)); - edma_shadow0_write_array(ctlr, SH_IESR, lch >> 5, - BIT(lch & 0x1f)); - } -} - -static int irq2ctlr(int irq) -{ - if (irq >= edma_cc[0]->irq_res_start && irq <= edma_cc[0]->irq_res_end) - return 0; - else if (irq >= edma_cc[1]->irq_res_start && - irq <= edma_cc[1]->irq_res_end) - return 1; - - return -1; -} - -/****************************************************************************** - * - * DMA interrupt handler - * - *****************************************************************************/ -static irqreturn_t dma_irq_handler(int irq, void *data) -{ - int ctlr; - u32 sh_ier; - u32 sh_ipr; - u32 bank; - - ctlr = irq2ctlr(irq); - if (ctlr < 0) - return IRQ_NONE; - - dev_dbg(data, "dma_irq_handler\n"); - - sh_ipr = edma_shadow0_read_array(ctlr, SH_IPR, 0); - if (!sh_ipr) { - sh_ipr = edma_shadow0_read_array(ctlr, SH_IPR, 1); - if (!sh_ipr) - return IRQ_NONE; - sh_ier = edma_shadow0_read_array(ctlr, SH_IER, 1); - bank = 1; - } else { - sh_ier = edma_shadow0_read_array(ctlr, SH_IER, 0); - bank = 0; - } - - do { - u32 slot; - u32 channel; - - dev_dbg(data, "IPR%d %08x\n", bank, sh_ipr); - - slot = __ffs(sh_ipr); - sh_ipr &= ~(BIT(slot)); - - if (sh_ier & BIT(slot)) { - channel = (bank << 5) | slot; - /* Clear the corresponding IPR bits */ - edma_shadow0_write_array(ctlr, SH_ICR, bank, - BIT(slot)); - if (edma_cc[ctlr]->intr_data[channel].callback) - edma_cc[ctlr]->intr_data[channel].callback( - channel, EDMA_DMA_COMPLETE, - edma_cc[ctlr]->intr_data[channel].data); - } - } while (sh_ipr); - - edma_shadow0_write(ctlr, SH_IEVAL, 1); - return IRQ_HANDLED; -} - -/****************************************************************************** - * - * DMA error interrupt handler - * - *****************************************************************************/ -static irqreturn_t dma_ccerr_handler(int irq, void *data) -{ - int i; - int ctlr; - unsigned int cnt = 0; - - ctlr = irq2ctlr(irq); - if (ctlr < 0) - return IRQ_NONE; - - dev_dbg(data, "dma_ccerr_handler\n"); - - if ((edma_read_array(ctlr, EDMA_EMR, 0) == 0) && - (edma_read_array(ctlr, EDMA_EMR, 1) == 0) && - (edma_read(ctlr, EDMA_QEMR) == 0) && - (edma_read(ctlr, EDMA_CCERR) == 0)) - return IRQ_NONE; - - while (1) { - int j = -1; - if (edma_read_array(ctlr, EDMA_EMR, 0)) - j = 0; - else if (edma_read_array(ctlr, EDMA_EMR, 1)) - j = 1; - if (j >= 0) { - dev_dbg(data, "EMR%d %08x\n", j, - edma_read_array(ctlr, EDMA_EMR, j)); - for (i = 0; i < 32; i++) { - int k = (j << 5) + i; - if (edma_read_array(ctlr, EDMA_EMR, j) & - BIT(i)) { - /* Clear the corresponding EMR bits */ - edma_write_array(ctlr, EDMA_EMCR, j, - BIT(i)); - /* Clear any SER */ - edma_shadow0_write_array(ctlr, SH_SECR, - j, BIT(i)); - if (edma_cc[ctlr]->intr_data[k]. - callback) { - edma_cc[ctlr]->intr_data[k]. - callback(k, - EDMA_DMA_CC_ERROR, - edma_cc[ctlr]->intr_data - [k].data); - } - } - } - } else if (edma_read(ctlr, EDMA_QEMR)) { - dev_dbg(data, "QEMR %02x\n", - edma_read(ctlr, EDMA_QEMR)); - for (i = 0; i < 8; i++) { - if (edma_read(ctlr, EDMA_QEMR) & BIT(i)) { - /* Clear the corresponding IPR bits */ - edma_write(ctlr, EDMA_QEMCR, BIT(i)); - edma_shadow0_write(ctlr, SH_QSECR, - BIT(i)); - - /* NOTE: not reported!! */ - } - } - } else if (edma_read(ctlr, EDMA_CCERR)) { - dev_dbg(data, "CCERR %08x\n", - edma_read(ctlr, EDMA_CCERR)); - /* FIXME: CCERR.BIT(16) ignored! much better - * to just write CCERRCLR with CCERR value... - */ - for (i = 0; i < 8; i++) { - if (edma_read(ctlr, EDMA_CCERR) & BIT(i)) { - /* Clear the corresponding IPR bits */ - edma_write(ctlr, EDMA_CCERRCLR, BIT(i)); - - /* NOTE: not reported!! */ - } - } - } - if ((edma_read_array(ctlr, EDMA_EMR, 0) == 0) && - (edma_read_array(ctlr, EDMA_EMR, 1) == 0) && - (edma_read(ctlr, EDMA_QEMR) == 0) && - (edma_read(ctlr, EDMA_CCERR) == 0)) - break; - cnt++; - if (cnt > 10) - break; - } - edma_write(ctlr, EDMA_EEVAL, 1); - return IRQ_HANDLED; -} - -static int reserve_contiguous_slots(int ctlr, unsigned int id, - unsigned int num_slots, - unsigned int start_slot) -{ - int i, j; - unsigned int count = num_slots; - int stop_slot = start_slot; - DECLARE_BITMAP(tmp_inuse, EDMA_MAX_PARAMENTRY); - - for (i = start_slot; i < edma_cc[ctlr]->num_slots; ++i) { - j = EDMA_CHAN_SLOT(i); - if (!test_and_set_bit(j, edma_cc[ctlr]->edma_inuse)) { - /* Record our current beginning slot */ - if (count == num_slots) - stop_slot = i; - - count--; - set_bit(j, tmp_inuse); - - if (count == 0) - break; - } else { - clear_bit(j, tmp_inuse); - - if (id == EDMA_CONT_PARAMS_FIXED_EXACT) { - stop_slot = i; - break; - } else { - count = num_slots; - } - } - } - - /* - * We have to clear any bits that we set - * if we run out parameter RAM slots, i.e we do find a set - * of contiguous parameter RAM slots but do not find the exact number - * requested as we may reach the total number of parameter RAM slots - */ - if (i == edma_cc[ctlr]->num_slots) - stop_slot = i; - - j = start_slot; - for_each_set_bit_from(j, tmp_inuse, stop_slot) - clear_bit(j, edma_cc[ctlr]->edma_inuse); - - if (count) - return -EBUSY; - - for (j = i - num_slots + 1; j <= i; ++j) - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(j), - &dummy_paramset, PARM_SIZE); - - return EDMA_CTLR_CHAN(ctlr, i - num_slots + 1); -} - -static int prepare_unused_channel_list(struct device *dev, void *data) -{ - struct platform_device *pdev = to_platform_device(dev); - int i, count, ctlr; - struct of_phandle_args dma_spec; - - if (dev->of_node) { - count = of_property_count_strings(dev->of_node, "dma-names"); - if (count < 0) - return 0; - for (i = 0; i < count; i++) { - if (of_parse_phandle_with_args(dev->of_node, "dmas", - "#dma-cells", i, - &dma_spec)) - continue; - - if (!of_match_node(edma_of_ids, dma_spec.np)) { - of_node_put(dma_spec.np); - continue; - } - - clear_bit(EDMA_CHAN_SLOT(dma_spec.args[0]), - edma_cc[0]->edma_unused); - of_node_put(dma_spec.np); - } - return 0; - } - - /* For non-OF case */ - for (i = 0; i < pdev->num_resources; i++) { - if ((pdev->resource[i].flags & IORESOURCE_DMA) && - (int)pdev->resource[i].start >= 0) { - ctlr = EDMA_CTLR(pdev->resource[i].start); - clear_bit(EDMA_CHAN_SLOT(pdev->resource[i].start), - edma_cc[ctlr]->edma_unused); - } - } - - return 0; -} - -/*-----------------------------------------------------------------------*/ - -static bool unused_chan_list_done; - -/* Resource alloc/free: dma channels, parameter RAM slots */ - -/** - * edma_alloc_channel - allocate DMA channel and paired parameter RAM - * @channel: specific channel to allocate; negative for "any unmapped channel" - * @callback: optional; to be issued on DMA completion or errors - * @data: passed to callback - * @eventq_no: an EVENTQ_* constant, used to choose which Transfer - * Controller (TC) executes requests using this channel. Use - * EVENTQ_DEFAULT unless you really need a high priority queue. - * - * This allocates a DMA channel and its associated parameter RAM slot. - * The parameter RAM is initialized to hold a dummy transfer. - * - * Normal use is to pass a specific channel number as @channel, to make - * use of hardware events mapped to that channel. When the channel will - * be used only for software triggering or event chaining, channels not - * mapped to hardware events (or mapped to unused events) are preferable. - * - * DMA transfers start from a channel using edma_start(), or by - * chaining. When the transfer described in that channel's parameter RAM - * slot completes, that slot's data may be reloaded through a link. - * - * DMA errors are only reported to the @callback associated with the - * channel driving that transfer, but transfer completion callbacks can - * be sent to another channel under control of the TCC field in - * the option word of the transfer's parameter RAM set. Drivers must not - * use DMA transfer completion callbacks for channels they did not allocate. - * (The same applies to TCC codes used in transfer chaining.) - * - * Returns the number of the channel, else negative errno. - */ -int edma_alloc_channel(int channel, - void (*callback)(unsigned channel, u16 ch_status, void *data), - void *data, - enum dma_event_q eventq_no) -{ - unsigned i, done = 0, ctlr = 0; - int ret = 0; - - if (!unused_chan_list_done) { - /* - * Scan all the platform devices to find out the EDMA channels - * used and clear them in the unused list, making the rest - * available for ARM usage. - */ - ret = bus_for_each_dev(&platform_bus_type, NULL, NULL, - prepare_unused_channel_list); - if (ret < 0) - return ret; - - unused_chan_list_done = true; - } - - if (channel >= 0) { - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - } - - if (channel < 0) { - for (i = 0; i < arch_num_cc; i++) { - channel = 0; - for (;;) { - channel = find_next_bit(edma_cc[i]->edma_unused, - edma_cc[i]->num_channels, - channel); - if (channel == edma_cc[i]->num_channels) - break; - if (!test_and_set_bit(channel, - edma_cc[i]->edma_inuse)) { - done = 1; - ctlr = i; - break; - } - channel++; - } - if (done) - break; - } - if (!done) - return -ENOMEM; - } else if (channel >= edma_cc[ctlr]->num_channels) { - return -EINVAL; - } else if (test_and_set_bit(channel, edma_cc[ctlr]->edma_inuse)) { - return -EBUSY; - } - - /* ensure access through shadow region 0 */ - edma_or_array2(ctlr, EDMA_DRAE, 0, channel >> 5, BIT(channel & 0x1f)); - - /* ensure no events are pending */ - edma_stop(EDMA_CTLR_CHAN(ctlr, channel)); - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(channel), - &dummy_paramset, PARM_SIZE); - - if (callback) - setup_dma_interrupt(EDMA_CTLR_CHAN(ctlr, channel), - callback, data); - - map_dmach_queue(ctlr, channel, eventq_no); - - return EDMA_CTLR_CHAN(ctlr, channel); -} -EXPORT_SYMBOL(edma_alloc_channel); - - -/** - * edma_free_channel - deallocate DMA channel - * @channel: dma channel returned from edma_alloc_channel() - * - * This deallocates the DMA channel and associated parameter RAM slot - * allocated by edma_alloc_channel(). - * - * Callers are responsible for ensuring the channel is inactive, and - * will not be reactivated by linking, chaining, or software calls to - * edma_start(). - */ -void edma_free_channel(unsigned channel) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel >= edma_cc[ctlr]->num_channels) - return; - - setup_dma_interrupt(channel, NULL, NULL); - /* REVISIT should probably take out of shadow region 0 */ - - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(channel), - &dummy_paramset, PARM_SIZE); - clear_bit(channel, edma_cc[ctlr]->edma_inuse); -} -EXPORT_SYMBOL(edma_free_channel); - -/** - * edma_alloc_slot - allocate DMA parameter RAM - * @slot: specific slot to allocate; negative for "any unused slot" - * - * This allocates a parameter RAM slot, initializing it to hold a - * dummy transfer. Slots allocated using this routine have not been - * mapped to a hardware DMA channel, and will normally be used by - * linking to them from a slot associated with a DMA channel. - * - * Normal use is to pass EDMA_SLOT_ANY as the @slot, but specific - * slots may be allocated on behalf of DSP firmware. - * - * Returns the number of the slot, else negative errno. - */ -int edma_alloc_slot(unsigned ctlr, int slot) -{ - if (!edma_cc[ctlr]) - return -EINVAL; - - if (slot >= 0) - slot = EDMA_CHAN_SLOT(slot); - - if (slot < 0) { - slot = edma_cc[ctlr]->num_channels; - for (;;) { - slot = find_next_zero_bit(edma_cc[ctlr]->edma_inuse, - edma_cc[ctlr]->num_slots, slot); - if (slot == edma_cc[ctlr]->num_slots) - return -ENOMEM; - if (!test_and_set_bit(slot, edma_cc[ctlr]->edma_inuse)) - break; - } - } else if (slot < edma_cc[ctlr]->num_channels || - slot >= edma_cc[ctlr]->num_slots) { - return -EINVAL; - } else if (test_and_set_bit(slot, edma_cc[ctlr]->edma_inuse)) { - return -EBUSY; - } - - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot), - &dummy_paramset, PARM_SIZE); - - return EDMA_CTLR_CHAN(ctlr, slot); -} -EXPORT_SYMBOL(edma_alloc_slot); - -/** - * edma_free_slot - deallocate DMA parameter RAM - * @slot: parameter RAM slot returned from edma_alloc_slot() - * - * This deallocates the parameter RAM slot allocated by edma_alloc_slot(). - * Callers are responsible for ensuring the slot is inactive, and will - * not be activated. - */ -void edma_free_slot(unsigned slot) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_channels || - slot >= edma_cc[ctlr]->num_slots) - return; - - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot), - &dummy_paramset, PARM_SIZE); - clear_bit(slot, edma_cc[ctlr]->edma_inuse); -} -EXPORT_SYMBOL(edma_free_slot); - - -/** - * edma_alloc_cont_slots- alloc contiguous parameter RAM slots - * The API will return the starting point of a set of - * contiguous parameter RAM slots that have been requested - * - * @id: can only be EDMA_CONT_PARAMS_ANY or EDMA_CONT_PARAMS_FIXED_EXACT - * or EDMA_CONT_PARAMS_FIXED_NOT_EXACT - * @count: number of contiguous Paramter RAM slots - * @slot - the start value of Parameter RAM slot that should be passed if id - * is EDMA_CONT_PARAMS_FIXED_EXACT or EDMA_CONT_PARAMS_FIXED_NOT_EXACT - * - * If id is EDMA_CONT_PARAMS_ANY then the API starts looking for a set of - * contiguous Parameter RAM slots from parameter RAM 64 in the case of - * DaVinci SOCs and 32 in the case of DA8xx SOCs. - * - * If id is EDMA_CONT_PARAMS_FIXED_EXACT then the API starts looking for a - * set of contiguous parameter RAM slots from the "slot" that is passed as an - * argument to the API. - * - * If id is EDMA_CONT_PARAMS_FIXED_NOT_EXACT then the API initially tries - * starts looking for a set of contiguous parameter RAMs from the "slot" - * that is passed as an argument to the API. On failure the API will try to - * find a set of contiguous Parameter RAM slots from the remaining Parameter - * RAM slots - */ -int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count) -{ - /* - * The start slot requested should be greater than - * the number of channels and lesser than the total number - * of slots - */ - if ((id != EDMA_CONT_PARAMS_ANY) && - (slot < edma_cc[ctlr]->num_channels || - slot >= edma_cc[ctlr]->num_slots)) - return -EINVAL; - - /* - * The number of parameter RAM slots requested cannot be less than 1 - * and cannot be more than the number of slots minus the number of - * channels - */ - if (count < 1 || count > - (edma_cc[ctlr]->num_slots - edma_cc[ctlr]->num_channels)) - return -EINVAL; - - switch (id) { - case EDMA_CONT_PARAMS_ANY: - return reserve_contiguous_slots(ctlr, id, count, - edma_cc[ctlr]->num_channels); - case EDMA_CONT_PARAMS_FIXED_EXACT: - case EDMA_CONT_PARAMS_FIXED_NOT_EXACT: - return reserve_contiguous_slots(ctlr, id, count, slot); - default: - return -EINVAL; - } - -} -EXPORT_SYMBOL(edma_alloc_cont_slots); - -/** - * edma_free_cont_slots - deallocate DMA parameter RAM slots - * @slot: first parameter RAM of a set of parameter RAM slots to be freed - * @count: the number of contiguous parameter RAM slots to be freed - * - * This deallocates the parameter RAM slots allocated by - * edma_alloc_cont_slots. - * Callers/applications need to keep track of sets of contiguous - * parameter RAM slots that have been allocated using the edma_alloc_cont_slots - * API. - * Callers are responsible for ensuring the slots are inactive, and will - * not be activated. - */ -int edma_free_cont_slots(unsigned slot, int count) -{ - unsigned ctlr, slot_to_free; - int i; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_channels || - slot >= edma_cc[ctlr]->num_slots || - count < 1) - return -EINVAL; - - for (i = slot; i < slot + count; ++i) { - ctlr = EDMA_CTLR(i); - slot_to_free = EDMA_CHAN_SLOT(i); - - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot_to_free), - &dummy_paramset, PARM_SIZE); - clear_bit(slot_to_free, edma_cc[ctlr]->edma_inuse); - } - - return 0; -} -EXPORT_SYMBOL(edma_free_cont_slots); - -/*-----------------------------------------------------------------------*/ - -/* Parameter RAM operations (i) -- read/write partial slots */ - -/** - * edma_set_src - set initial DMA source address in parameter RAM slot - * @slot: parameter RAM slot being configured - * @src_port: physical address of source (memory, controller FIFO, etc) - * @addressMode: INCR, except in very rare cases - * @fifoWidth: ignored unless @addressMode is FIFO, else specifies the - * width to use when addressing the fifo (e.g. W8BIT, W32BIT) - * - * Note that the source address is modified during the DMA transfer - * according to edma_set_src_index(). - */ -void edma_set_src(unsigned slot, dma_addr_t src_port, - enum address_mode mode, enum fifo_width width) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot); - - if (mode) { - /* set SAM and program FWID */ - i = (i & ~(EDMA_FWID)) | (SAM | ((width & 0x7) << 8)); - } else { - /* clear SAM */ - i &= ~SAM; - } - edma_parm_write(ctlr, PARM_OPT, slot, i); - - /* set the source port address - in source register of param structure */ - edma_parm_write(ctlr, PARM_SRC, slot, src_port); - } -} -EXPORT_SYMBOL(edma_set_src); - -/** - * edma_set_dest - set initial DMA destination address in parameter RAM slot - * @slot: parameter RAM slot being configured - * @dest_port: physical address of destination (memory, controller FIFO, etc) - * @addressMode: INCR, except in very rare cases - * @fifoWidth: ignored unless @addressMode is FIFO, else specifies the - * width to use when addressing the fifo (e.g. W8BIT, W32BIT) - * - * Note that the destination address is modified during the DMA transfer - * according to edma_set_dest_index(). - */ -void edma_set_dest(unsigned slot, dma_addr_t dest_port, - enum address_mode mode, enum fifo_width width) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot); - - if (mode) { - /* set DAM and program FWID */ - i = (i & ~(EDMA_FWID)) | (DAM | ((width & 0x7) << 8)); - } else { - /* clear DAM */ - i &= ~DAM; - } - edma_parm_write(ctlr, PARM_OPT, slot, i); - /* set the destination port address - in dest register of param structure */ - edma_parm_write(ctlr, PARM_DST, slot, dest_port); - } -} -EXPORT_SYMBOL(edma_set_dest); - -/** - * edma_get_position - returns the current transfer point - * @slot: parameter RAM slot being examined - * @dst: true selects the dest position, false the source - * - * Returns the position of the current active slot - */ -dma_addr_t edma_get_position(unsigned slot, bool dst) -{ - u32 offs, ctlr = EDMA_CTLR(slot); - - slot = EDMA_CHAN_SLOT(slot); - - offs = PARM_OFFSET(slot); - offs += dst ? PARM_DST : PARM_SRC; - - return edma_read(ctlr, offs); -} - -/** - * edma_set_src_index - configure DMA source address indexing - * @slot: parameter RAM slot being configured - * @src_bidx: byte offset between source arrays in a frame - * @src_cidx: byte offset between source frames in a block - * - * Offsets are specified to support either contiguous or discontiguous - * memory transfers, or repeated access to a hardware register, as needed. - * When accessing hardware registers, both offsets are normally zero. - */ -void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot, - 0xffff0000, src_bidx); - edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot, - 0xffff0000, src_cidx); - } -} -EXPORT_SYMBOL(edma_set_src_index); - -/** - * edma_set_dest_index - configure DMA destination address indexing - * @slot: parameter RAM slot being configured - * @dest_bidx: byte offset between destination arrays in a frame - * @dest_cidx: byte offset between destination frames in a block - * - * Offsets are specified to support either contiguous or discontiguous - * memory transfers, or repeated access to a hardware register, as needed. - * When accessing hardware registers, both offsets are normally zero. - */ -void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot, - 0x0000ffff, dest_bidx << 16); - edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot, - 0x0000ffff, dest_cidx << 16); - } -} -EXPORT_SYMBOL(edma_set_dest_index); - -/** - * edma_set_transfer_params - configure DMA transfer parameters - * @slot: parameter RAM slot being configured - * @acnt: how many bytes per array (at least one) - * @bcnt: how many arrays per frame (at least one) - * @ccnt: how many frames per block (at least one) - * @bcnt_rld: used only for A-Synchronized transfers; this specifies - * the value to reload into bcnt when it decrements to zero - * @sync_mode: ASYNC or ABSYNC - * - * See the EDMA3 documentation to understand how to configure and link - * transfers using the fields in PaRAM slots. If you are not doing it - * all at once with edma_write_slot(), you will use this routine - * plus two calls each for source and destination, setting the initial - * address and saying how to index that address. - * - * An example of an A-Synchronized transfer is a serial link using a - * single word shift register. In that case, @acnt would be equal to - * that word size; the serial controller issues a DMA synchronization - * event to transfer each word, and memory access by the DMA transfer - * controller will be word-at-a-time. - * - * An example of an AB-Synchronized transfer is a device using a FIFO. - * In that case, @acnt equals the FIFO width and @bcnt equals its depth. - * The controller with the FIFO issues DMA synchronization events when - * the FIFO threshold is reached, and the DMA transfer controller will - * transfer one frame to (or from) the FIFO. It will probably use - * efficient burst modes to access memory. - */ -void edma_set_transfer_params(unsigned slot, - u16 acnt, u16 bcnt, u16 ccnt, - u16 bcnt_rld, enum sync_dimension sync_mode) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - edma_parm_modify(ctlr, PARM_LINK_BCNTRLD, slot, - 0x0000ffff, bcnt_rld << 16); - if (sync_mode == ASYNC) - edma_parm_and(ctlr, PARM_OPT, slot, ~SYNCDIM); - else - edma_parm_or(ctlr, PARM_OPT, slot, SYNCDIM); - /* Set the acount, bcount, ccount registers */ - edma_parm_write(ctlr, PARM_A_B_CNT, slot, (bcnt << 16) | acnt); - edma_parm_write(ctlr, PARM_CCNT, slot, ccnt); - } -} -EXPORT_SYMBOL(edma_set_transfer_params); - -/** - * edma_link - link one parameter RAM slot to another - * @from: parameter RAM slot originating the link - * @to: parameter RAM slot which is the link target - * - * The originating slot should not be part of any active DMA transfer. - */ -void edma_link(unsigned from, unsigned to) -{ - unsigned ctlr_from, ctlr_to; - - ctlr_from = EDMA_CTLR(from); - from = EDMA_CHAN_SLOT(from); - ctlr_to = EDMA_CTLR(to); - to = EDMA_CHAN_SLOT(to); - - if (from >= edma_cc[ctlr_from]->num_slots) - return; - if (to >= edma_cc[ctlr_to]->num_slots) - return; - edma_parm_modify(ctlr_from, PARM_LINK_BCNTRLD, from, 0xffff0000, - PARM_OFFSET(to)); -} -EXPORT_SYMBOL(edma_link); - -/** - * edma_unlink - cut link from one parameter RAM slot - * @from: parameter RAM slot originating the link - * - * The originating slot should not be part of any active DMA transfer. - * Its link is set to 0xffff. - */ -void edma_unlink(unsigned from) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(from); - from = EDMA_CHAN_SLOT(from); - - if (from >= edma_cc[ctlr]->num_slots) - return; - edma_parm_or(ctlr, PARM_LINK_BCNTRLD, from, 0xffff); -} -EXPORT_SYMBOL(edma_unlink); - -/*-----------------------------------------------------------------------*/ - -/* Parameter RAM operations (ii) -- read/write whole parameter sets */ - -/** - * edma_write_slot - write parameter RAM data for slot - * @slot: number of parameter RAM slot being modified - * @param: data to be written into parameter RAM slot - * - * Use this to assign all parameters of a transfer at once. This - * allows more efficient setup of transfers than issuing multiple - * calls to set up those parameters in small pieces, and provides - * complete control over all transfer options. - */ -void edma_write_slot(unsigned slot, const struct edmacc_param *param) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot >= edma_cc[ctlr]->num_slots) - return; - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot), param, - PARM_SIZE); -} -EXPORT_SYMBOL(edma_write_slot); - -/** - * edma_read_slot - read parameter RAM data from slot - * @slot: number of parameter RAM slot being copied - * @param: where to store copy of parameter RAM data - * - * Use this to read data from a parameter RAM slot, perhaps to - * save them as a template for later reuse. - */ -void edma_read_slot(unsigned slot, struct edmacc_param *param) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot >= edma_cc[ctlr]->num_slots) - return; - memcpy_fromio(param, edmacc_regs_base[ctlr] + PARM_OFFSET(slot), - PARM_SIZE); -} -EXPORT_SYMBOL(edma_read_slot); - -/*-----------------------------------------------------------------------*/ - -/* Various EDMA channel control operations */ - -/** - * edma_pause - pause dma on a channel - * @channel: on which edma_start() has been called - * - * This temporarily disables EDMA hardware events on the specified channel, - * preventing them from triggering new transfers on its behalf - */ -void edma_pause(unsigned channel) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel < edma_cc[ctlr]->num_channels) { - unsigned int mask = BIT(channel & 0x1f); - - edma_shadow0_write_array(ctlr, SH_EECR, channel >> 5, mask); - } -} -EXPORT_SYMBOL(edma_pause); - -/** - * edma_resume - resumes dma on a paused channel - * @channel: on which edma_pause() has been called - * - * This re-enables EDMA hardware events on the specified channel. - */ -void edma_resume(unsigned channel) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel < edma_cc[ctlr]->num_channels) { - unsigned int mask = BIT(channel & 0x1f); - - edma_shadow0_write_array(ctlr, SH_EESR, channel >> 5, mask); - } -} -EXPORT_SYMBOL(edma_resume); - -int edma_trigger_channel(unsigned channel) -{ - unsigned ctlr; - unsigned int mask; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - mask = BIT(channel & 0x1f); - - edma_shadow0_write_array(ctlr, SH_ESR, (channel >> 5), mask); - - pr_debug("EDMA: ESR%d %08x\n", (channel >> 5), - edma_shadow0_read_array(ctlr, SH_ESR, (channel >> 5))); - return 0; -} -EXPORT_SYMBOL(edma_trigger_channel); - -/** - * edma_start - start dma on a channel - * @channel: channel being activated - * - * Channels with event associations will be triggered by their hardware - * events, and channels without such associations will be triggered by - * software. (At this writing there is no interface for using software - * triggers except with channels that don't support hardware triggers.) - * - * Returns zero on success, else negative errno. - */ -int edma_start(unsigned channel) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel < edma_cc[ctlr]->num_channels) { - int j = channel >> 5; - unsigned int mask = BIT(channel & 0x1f); - - /* EDMA channels without event association */ - if (test_bit(channel, edma_cc[ctlr]->edma_unused)) { - pr_debug("EDMA: ESR%d %08x\n", j, - edma_shadow0_read_array(ctlr, SH_ESR, j)); - edma_shadow0_write_array(ctlr, SH_ESR, j, mask); - return 0; - } - - /* EDMA channel with event association */ - pr_debug("EDMA: ER%d %08x\n", j, - edma_shadow0_read_array(ctlr, SH_ER, j)); - /* Clear any pending event or error */ - edma_write_array(ctlr, EDMA_ECR, j, mask); - edma_write_array(ctlr, EDMA_EMCR, j, mask); - /* Clear any SER */ - edma_shadow0_write_array(ctlr, SH_SECR, j, mask); - edma_shadow0_write_array(ctlr, SH_EESR, j, mask); - pr_debug("EDMA: EER%d %08x\n", j, - edma_shadow0_read_array(ctlr, SH_EER, j)); - return 0; - } - - return -EINVAL; -} -EXPORT_SYMBOL(edma_start); - -/** - * edma_stop - stops dma on the channel passed - * @channel: channel being deactivated - * - * When @lch is a channel, any active transfer is paused and - * all pending hardware events are cleared. The current transfer - * may not be resumed, and the channel's Parameter RAM should be - * reinitialized before being reused. - */ -void edma_stop(unsigned channel) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel < edma_cc[ctlr]->num_channels) { - int j = channel >> 5; - unsigned int mask = BIT(channel & 0x1f); - - edma_shadow0_write_array(ctlr, SH_EECR, j, mask); - edma_shadow0_write_array(ctlr, SH_ECR, j, mask); - edma_shadow0_write_array(ctlr, SH_SECR, j, mask); - edma_write_array(ctlr, EDMA_EMCR, j, mask); - - /* clear possibly pending completion interrupt */ - edma_shadow0_write_array(ctlr, SH_ICR, j, mask); - - pr_debug("EDMA: EER%d %08x\n", j, - edma_shadow0_read_array(ctlr, SH_EER, j)); - - /* REVISIT: consider guarding against inappropriate event - * chaining by overwriting with dummy_paramset. - */ - } -} -EXPORT_SYMBOL(edma_stop); - -/****************************************************************************** - * - * It cleans ParamEntry qand bring back EDMA to initial state if media has - * been removed before EDMA has finished.It is usedful for removable media. - * Arguments: - * ch_no - channel no - * - * Return: zero on success, or corresponding error no on failure - * - * FIXME this should not be needed ... edma_stop() should suffice. - * - *****************************************************************************/ - -void edma_clean_channel(unsigned channel) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel < edma_cc[ctlr]->num_channels) { - int j = (channel >> 5); - unsigned int mask = BIT(channel & 0x1f); - - pr_debug("EDMA: EMR%d %08x\n", j, - edma_read_array(ctlr, EDMA_EMR, j)); - edma_shadow0_write_array(ctlr, SH_ECR, j, mask); - /* Clear the corresponding EMR bits */ - edma_write_array(ctlr, EDMA_EMCR, j, mask); - /* Clear any SER */ - edma_shadow0_write_array(ctlr, SH_SECR, j, mask); - edma_write(ctlr, EDMA_CCERRCLR, BIT(16) | BIT(1) | BIT(0)); - } -} -EXPORT_SYMBOL(edma_clean_channel); - -/* - * edma_clear_event - clear an outstanding event on the DMA channel - * Arguments: - * channel - channel number - */ -void edma_clear_event(unsigned channel) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel >= edma_cc[ctlr]->num_channels) - return; - if (channel < 32) - edma_write(ctlr, EDMA_ECR, BIT(channel)); - else - edma_write(ctlr, EDMA_ECRH, BIT(channel - 32)); -} -EXPORT_SYMBOL(edma_clear_event); - -/* - * edma_assign_channel_eventq - move given channel to desired eventq - * Arguments: - * channel - channel number - * eventq_no - queue to move the channel - * - * Can be used to move a channel to a selected event queue. - */ -void edma_assign_channel_eventq(unsigned channel, enum dma_event_q eventq_no) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel >= edma_cc[ctlr]->num_channels) - return; - - /* default to low priority queue */ - if (eventq_no == EVENTQ_DEFAULT) - eventq_no = edma_cc[ctlr]->default_queue; - if (eventq_no >= edma_cc[ctlr]->num_tc) - return; - - map_dmach_queue(ctlr, channel, eventq_no); -} -EXPORT_SYMBOL(edma_assign_channel_eventq); - -static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata, - struct edma *edma_cc, int cc_id) -{ - int i; - u32 value, cccfg; - s8 (*queue_priority_map)[2]; - - /* Decode the eDMA3 configuration from CCCFG register */ - cccfg = edma_read(cc_id, EDMA_CCCFG); - - value = GET_NUM_REGN(cccfg); - edma_cc->num_region = BIT(value); - - value = GET_NUM_DMACH(cccfg); - edma_cc->num_channels = BIT(value + 1); - - value = GET_NUM_PAENTRY(cccfg); - edma_cc->num_slots = BIT(value + 4); - - value = GET_NUM_EVQUE(cccfg); - edma_cc->num_tc = value + 1; - - dev_dbg(dev, "eDMA3 CC%d HW configuration (cccfg: 0x%08x):\n", cc_id, - cccfg); - dev_dbg(dev, "num_region: %u\n", edma_cc->num_region); - dev_dbg(dev, "num_channel: %u\n", edma_cc->num_channels); - dev_dbg(dev, "num_slot: %u\n", edma_cc->num_slots); - dev_dbg(dev, "num_tc: %u\n", edma_cc->num_tc); - - /* Nothing need to be done if queue priority is provided */ - if (pdata->queue_priority_mapping) - return 0; - - /* - * Configure TC/queue priority as follows: - * Q0 - priority 0 - * Q1 - priority 1 - * Q2 - priority 2 - * ... - * The meaning of priority numbers: 0 highest priority, 7 lowest - * priority. So Q0 is the highest priority queue and the last queue has - * the lowest priority. - */ - queue_priority_map = devm_kzalloc(dev, - (edma_cc->num_tc + 1) * sizeof(s8), - GFP_KERNEL); - if (!queue_priority_map) - return -ENOMEM; - - for (i = 0; i < edma_cc->num_tc; i++) { - queue_priority_map[i][0] = i; - queue_priority_map[i][1] = i; - } - queue_priority_map[i][0] = -1; - queue_priority_map[i][1] = -1; - - pdata->queue_priority_mapping = queue_priority_map; - /* Default queue has the lowest priority */ - pdata->default_queue = i - 1; - - return 0; -} - -#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DMADEVICES) - -static int edma_xbar_event_map(struct device *dev, struct device_node *node, - struct edma_soc_info *pdata, size_t sz) -{ - const char pname[] = "ti,edma-xbar-event-map"; - struct resource res; - void __iomem *xbar; - s16 (*xbar_chans)[2]; - size_t nelm = sz / sizeof(s16); - u32 shift, offset, mux; - int ret, i; - - xbar_chans = devm_kzalloc(dev, (nelm + 2) * sizeof(s16), GFP_KERNEL); - if (!xbar_chans) - return -ENOMEM; - - ret = of_address_to_resource(node, 1, &res); - if (ret) - return -ENOMEM; - - xbar = devm_ioremap(dev, res.start, resource_size(&res)); - if (!xbar) - return -ENOMEM; - - ret = of_property_read_u16_array(node, pname, (u16 *)xbar_chans, nelm); - if (ret) - return -EIO; - - /* Invalidate last entry for the other user of this mess */ - nelm >>= 1; - xbar_chans[nelm][0] = xbar_chans[nelm][1] = -1; - - for (i = 0; i < nelm; i++) { - shift = (xbar_chans[i][1] & 0x03) << 3; - offset = xbar_chans[i][1] & 0xfffffffc; - mux = readl(xbar + offset); - mux &= ~(0xff << shift); - mux |= xbar_chans[i][0] << shift; - writel(mux, (xbar + offset)); - } - - pdata->xbar_chans = (const s16 (*)[2]) xbar_chans; - return 0; -} - -static int edma_of_parse_dt(struct device *dev, - struct device_node *node, - struct edma_soc_info *pdata) -{ - int ret = 0; - struct property *prop; - size_t sz; - struct edma_rsv_info *rsv_info; - - rsv_info = devm_kzalloc(dev, sizeof(struct edma_rsv_info), GFP_KERNEL); - if (!rsv_info) - return -ENOMEM; - pdata->rsv = rsv_info; - - prop = of_find_property(node, "ti,edma-xbar-event-map", &sz); - if (prop) - ret = edma_xbar_event_map(dev, node, pdata, sz); - - return ret; -} - -static struct of_dma_filter_info edma_filter_info = { - .filter_fn = edma_filter_fn, -}; - -static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev, - struct device_node *node) -{ - struct edma_soc_info *info; - int ret; - - info = devm_kzalloc(dev, sizeof(struct edma_soc_info), GFP_KERNEL); - if (!info) - return ERR_PTR(-ENOMEM); - - ret = edma_of_parse_dt(dev, node, info); - if (ret) - return ERR_PTR(ret); - - dma_cap_set(DMA_SLAVE, edma_filter_info.dma_cap); - dma_cap_set(DMA_CYCLIC, edma_filter_info.dma_cap); - of_dma_controller_register(dev->of_node, of_dma_simple_xlate, - &edma_filter_info); - - return info; -} -#else -static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev, - struct device_node *node) -{ - return ERR_PTR(-ENOSYS); -} -#endif - -static int edma_probe(struct platform_device *pdev) -{ - struct edma_soc_info **info = pdev->dev.platform_data; - struct edma_soc_info *ninfo[EDMA_MAX_CC] = {NULL}; - s8 (*queue_priority_mapping)[2]; - int i, j, off, ln, found = 0; - int status = -1; - const s16 (*rsv_chans)[2]; - const s16 (*rsv_slots)[2]; - const s16 (*xbar_chans)[2]; - int irq[EDMA_MAX_CC] = {0, 0}; - int err_irq[EDMA_MAX_CC] = {0, 0}; - struct resource *r[EDMA_MAX_CC] = {NULL}; - struct resource res[EDMA_MAX_CC]; - char res_name[10]; - struct device_node *node = pdev->dev.of_node; - struct device *dev = &pdev->dev; - int ret; - struct platform_device_info edma_dev_info = { - .name = "edma-dma-engine", - .dma_mask = DMA_BIT_MASK(32), - .parent = &pdev->dev, - }; - - if (node) { - /* Check if this is a second instance registered */ - if (arch_num_cc) { - dev_err(dev, "only one EDMA instance is supported via DT\n"); - return -ENODEV; - } - - ninfo[0] = edma_setup_info_from_dt(dev, node); - if (IS_ERR(ninfo[0])) { - dev_err(dev, "failed to get DT data\n"); - return PTR_ERR(ninfo[0]); - } - - info = ninfo; - } - - if (!info) - return -ENODEV; - - pm_runtime_enable(dev); - ret = pm_runtime_get_sync(dev); - if (ret < 0) { - dev_err(dev, "pm_runtime_get_sync() failed\n"); - return ret; - } - - for (j = 0; j < EDMA_MAX_CC; j++) { - if (!info[j]) { - if (!found) - return -ENODEV; - break; - } - if (node) { - ret = of_address_to_resource(node, j, &res[j]); - if (!ret) - r[j] = &res[j]; - } else { - sprintf(res_name, "edma_cc%d", j); - r[j] = platform_get_resource_byname(pdev, - IORESOURCE_MEM, - res_name); - } - if (!r[j]) { - if (found) - break; - else - return -ENODEV; - } else { - found = 1; - } - - edmacc_regs_base[j] = devm_ioremap_resource(&pdev->dev, r[j]); - if (IS_ERR(edmacc_regs_base[j])) - return PTR_ERR(edmacc_regs_base[j]); - - edma_cc[j] = devm_kzalloc(&pdev->dev, sizeof(struct edma), - GFP_KERNEL); - if (!edma_cc[j]) - return -ENOMEM; - - /* Get eDMA3 configuration from IP */ - ret = edma_setup_from_hw(dev, info[j], edma_cc[j], j); - if (ret) - return ret; - - edma_cc[j]->default_queue = info[j]->default_queue; - - dev_dbg(&pdev->dev, "DMA REG BASE ADDR=%p\n", - edmacc_regs_base[j]); - - for (i = 0; i < edma_cc[j]->num_slots; i++) - memcpy_toio(edmacc_regs_base[j] + PARM_OFFSET(i), - &dummy_paramset, PARM_SIZE); - - /* Mark all channels as unused */ - memset(edma_cc[j]->edma_unused, 0xff, - sizeof(edma_cc[j]->edma_unused)); - - if (info[j]->rsv) { - - /* Clear the reserved channels in unused list */ - rsv_chans = info[j]->rsv->rsv_chans; - if (rsv_chans) { - for (i = 0; rsv_chans[i][0] != -1; i++) { - off = rsv_chans[i][0]; - ln = rsv_chans[i][1]; - clear_bits(off, ln, - edma_cc[j]->edma_unused); - } - } - - /* Set the reserved slots in inuse list */ - rsv_slots = info[j]->rsv->rsv_slots; - if (rsv_slots) { - for (i = 0; rsv_slots[i][0] != -1; i++) { - off = rsv_slots[i][0]; - ln = rsv_slots[i][1]; - set_bits(off, ln, - edma_cc[j]->edma_inuse); - } - } - } - - /* Clear the xbar mapped channels in unused list */ - xbar_chans = info[j]->xbar_chans; - if (xbar_chans) { - for (i = 0; xbar_chans[i][1] != -1; i++) { - off = xbar_chans[i][1]; - clear_bits(off, 1, - edma_cc[j]->edma_unused); - } - } - - if (node) { - irq[j] = irq_of_parse_and_map(node, 0); - err_irq[j] = irq_of_parse_and_map(node, 2); - } else { - char irq_name[10]; - - sprintf(irq_name, "edma%d", j); - irq[j] = platform_get_irq_byname(pdev, irq_name); - - sprintf(irq_name, "edma%d_err", j); - err_irq[j] = platform_get_irq_byname(pdev, irq_name); - } - edma_cc[j]->irq_res_start = irq[j]; - edma_cc[j]->irq_res_end = err_irq[j]; - - status = devm_request_irq(dev, irq[j], dma_irq_handler, 0, - "edma", dev); - if (status < 0) { - dev_dbg(&pdev->dev, - "devm_request_irq %d failed --> %d\n", - irq[j], status); - return status; - } - - status = devm_request_irq(dev, err_irq[j], dma_ccerr_handler, 0, - "edma_error", dev); - if (status < 0) { - dev_dbg(&pdev->dev, - "devm_request_irq %d failed --> %d\n", - err_irq[j], status); - return status; - } - - for (i = 0; i < edma_cc[j]->num_channels; i++) - map_dmach_queue(j, i, info[j]->default_queue); - - queue_priority_mapping = info[j]->queue_priority_mapping; - - /* Event queue priority mapping */ - for (i = 0; queue_priority_mapping[i][0] != -1; i++) - assign_priority_to_queue(j, - queue_priority_mapping[i][0], - queue_priority_mapping[i][1]); - - /* Map the channel to param entry if channel mapping logic - * exist - */ - if (edma_read(j, EDMA_CCCFG) & CHMAP_EXIST) - map_dmach_param(j); - - for (i = 0; i < edma_cc[j]->num_region; i++) { - edma_write_array2(j, EDMA_DRAE, i, 0, 0x0); - edma_write_array2(j, EDMA_DRAE, i, 1, 0x0); - edma_write_array(j, EDMA_QRAE, i, 0x0); - } - edma_cc[j]->info = info[j]; - arch_num_cc++; - - edma_dev_info.id = j; - platform_device_register_full(&edma_dev_info); - } - - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int edma_pm_resume(struct device *dev) -{ - int i, j; - - for (j = 0; j < arch_num_cc; j++) { - struct edma *cc = edma_cc[j]; - - s8 (*queue_priority_mapping)[2]; - - queue_priority_mapping = cc->info->queue_priority_mapping; - - /* Event queue priority mapping */ - for (i = 0; queue_priority_mapping[i][0] != -1; i++) - assign_priority_to_queue(j, - queue_priority_mapping[i][0], - queue_priority_mapping[i][1]); - - /* - * Map the channel to param entry if channel mapping logic - * exist - */ - if (edma_read(j, EDMA_CCCFG) & CHMAP_EXIST) - map_dmach_param(j); - - for (i = 0; i < cc->num_channels; i++) { - if (test_bit(i, cc->edma_inuse)) { - /* ensure access through shadow region 0 */ - edma_or_array2(j, EDMA_DRAE, 0, i >> 5, - BIT(i & 0x1f)); - - setup_dma_interrupt(i, - cc->intr_data[i].callback, - cc->intr_data[i].data); - } - } - } - - return 0; -} -#endif - -static const struct dev_pm_ops edma_pm_ops = { - SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, edma_pm_resume) -}; - -static struct platform_driver edma_driver = { - .driver = { - .name = "edma", - .pm = &edma_pm_ops, - .of_match_table = edma_of_ids, - }, - .probe = edma_probe, -}; - -static int __init edma_init(void) -{ - return platform_driver_probe(&edma_driver, edma_probe); -} -arch_initcall(edma_init); - diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c index 29e08aa..28c90bc 100644 --- a/arch/arm/mach-davinci/devices-da8xx.c +++ b/arch/arm/mach-davinci/devices-da8xx.c @@ -147,150 +147,118 @@ static s8 da850_queue_priority_mapping[][2] = { {-1, -1} }; -static struct edma_soc_info da830_edma_cc0_info = { +static struct edma_soc_info da8xx_edma0_pdata = { .queue_priority_mapping = da8xx_queue_priority_mapping, .default_queue = EVENTQ_1, }; -static struct edma_soc_info *da830_edma_info[EDMA_MAX_CC] = { - &da830_edma_cc0_info, +static struct edma_soc_info da850_edma1_pdata = { + .queue_priority_mapping = da850_queue_priority_mapping, + .default_queue = EVENTQ_0, }; -static struct edma_soc_info da850_edma_cc_info[] = { +static struct resource da8xx_edma0_resources[] = { { - .queue_priority_mapping = da8xx_queue_priority_mapping, - .default_queue = EVENTQ_1, - }, - { - .queue_priority_mapping = da850_queue_priority_mapping, - .default_queue = EVENTQ_0, - }, -}; - -static struct edma_soc_info *da850_edma_info[EDMA_MAX_CC] = { - &da850_edma_cc_info[0], - &da850_edma_cc_info[1], -}; - -static struct resource da830_edma_resources[] = { - { - .name = "edma_cc0", + .name = "edma3_cc", .start = DA8XX_TPCC_BASE, .end = DA8XX_TPCC_BASE + SZ_32K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc0", + .name = "edma3_tc0", .start = DA8XX_TPTC0_BASE, .end = DA8XX_TPTC0_BASE + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc1", + .name = "edma3_tc1", .start = DA8XX_TPTC1_BASE, .end = DA8XX_TPTC1_BASE + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma0", + .name = "edma3_ccint", .start = IRQ_DA8XX_CCINT0, .flags = IORESOURCE_IRQ, }, { - .name = "edma0_err", + .name = "edma3_ccerrint", .start = IRQ_DA8XX_CCERRINT, .flags = IORESOURCE_IRQ, }, }; -static struct resource da850_edma_resources[] = { - { - .name = "edma_cc0", - .start = DA8XX_TPCC_BASE, - .end = DA8XX_TPCC_BASE + SZ_32K - 1, - .flags = IORESOURCE_MEM, - }, - { - .name = "edma_tc0", - .start = DA8XX_TPTC0_BASE, - .end = DA8XX_TPTC0_BASE + SZ_1K - 1, - .flags = IORESOURCE_MEM, - }, - { - .name = "edma_tc1", - .start = DA8XX_TPTC1_BASE, - .end = DA8XX_TPTC1_BASE + SZ_1K - 1, - .flags = IORESOURCE_MEM, - }, +static struct resource da850_edma1_resources[] = { { - .name = "edma_cc1", + .name = "edma3_cc", .start = DA850_TPCC1_BASE, .end = DA850_TPCC1_BASE + SZ_32K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc2", + .name = "edma3_tc0", .start = DA850_TPTC2_BASE, .end = DA850_TPTC2_BASE + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma0", - .start = IRQ_DA8XX_CCINT0, - .flags = IORESOURCE_IRQ, - }, - { - .name = "edma0_err", - .start = IRQ_DA8XX_CCERRINT, - .flags = IORESOURCE_IRQ, - }, - { - .name = "edma1", + .name = "edma3_ccint", .start = IRQ_DA850_CCINT1, .flags = IORESOURCE_IRQ, }, { - .name = "edma1_err", + .name = "edma3_ccerrint", .start = IRQ_DA850_CCERRINT1, .flags = IORESOURCE_IRQ, }, }; -static struct platform_device da830_edma_device = { +static const struct platform_device_info da8xx_edma0_device __initconst = { .name = "edma", - .id = -1, - .dev = { - .platform_data = da830_edma_info, - }, - .num_resources = ARRAY_SIZE(da830_edma_resources), - .resource = da830_edma_resources, + .id = 0, + .dma_mask = DMA_BIT_MASK(32), + .res = da8xx_edma0_resources, + .num_res = ARRAY_SIZE(da8xx_edma0_resources), + .data = &da8xx_edma0_pdata, + .size_data = sizeof(da8xx_edma0_pdata), }; -static struct platform_device da850_edma_device = { +static const struct platform_device_info da850_edma1_device __initconst = { .name = "edma", - .id = -1, - .dev = { - .platform_data = da850_edma_info, - }, - .num_resources = ARRAY_SIZE(da850_edma_resources), - .resource = da850_edma_resources, + .id = 1, + .dma_mask = DMA_BIT_MASK(32), + .res = da850_edma1_resources, + .num_res = ARRAY_SIZE(da850_edma1_resources), + .data = &da850_edma1_pdata, + .size_data = sizeof(da850_edma1_pdata), }; int __init da830_register_edma(struct edma_rsv_info *rsv) { - da830_edma_cc0_info.rsv = rsv; + struct platform_device *edma_pdev; + + da8xx_edma0_pdata.rsv = rsv; - return platform_device_register(&da830_edma_device); + edma_pdev = platform_device_register_full(&da8xx_edma0_device); + return IS_ERR(edma_pdev) ? PTR_ERR(edma_pdev) : 0; } int __init da850_register_edma(struct edma_rsv_info *rsv[2]) { + struct platform_device *edma_pdev; + if (rsv) { - da850_edma_cc_info[0].rsv = rsv[0]; - da850_edma_cc_info[1].rsv = rsv[1]; + da8xx_edma0_pdata.rsv = rsv[0]; + da850_edma1_pdata.rsv = rsv[1]; } - return platform_device_register(&da850_edma_device); + edma_pdev = platform_device_register_full(&da8xx_edma0_device); + if (IS_ERR(edma_pdev)) { + pr_warn("%s: Failed to register eDMA0\n", __func__); + return PTR_ERR(edma_pdev); + } + edma_pdev = platform_device_register_full(&da850_edma1_device); + return IS_ERR(edma_pdev) ? PTR_ERR(edma_pdev) : 0; } static struct resource da8xx_i2c_resources0[] = { diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c index 567dc56..609950b 100644 --- a/arch/arm/mach-davinci/dm355.c +++ b/arch/arm/mach-davinci/dm355.c @@ -569,61 +569,58 @@ static u8 dm355_default_priorities[DAVINCI_N_AINTC_IRQ] = { /*----------------------------------------------------------------------*/ -static s8 -queue_priority_mapping[][2] = { +static s8 queue_priority_mapping[][2] = { /* {event queue no, Priority} */ {0, 3}, {1, 7}, {-1, -1}, }; -static struct edma_soc_info edma_cc0_info = { +static struct edma_soc_info dm355_edma_pdata = { .queue_priority_mapping = queue_priority_mapping, .default_queue = EVENTQ_1, }; -static struct edma_soc_info *dm355_edma_info[EDMA_MAX_CC] = { - &edma_cc0_info, -}; - static struct resource edma_resources[] = { { - .name = "edma_cc0", + .name = "edma3_cc", .start = 0x01c00000, .end = 0x01c00000 + SZ_64K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc0", + .name = "edma3_tc0", .start = 0x01c10000, .end = 0x01c10000 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc1", + .name = "edma3_tc1", .start = 0x01c10400, .end = 0x01c10400 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma0", + .name = "edma3_ccint", .start = IRQ_CCINT0, .flags = IORESOURCE_IRQ, }, { - .name = "edma0_err", + .name = "edma3_ccerrint", .start = IRQ_CCERRINT, .flags = IORESOURCE_IRQ, }, /* not using (or muxing) TC*_ERR */ }; -static struct platform_device dm355_edma_device = { - .name = "edma", - .id = 0, - .dev.platform_data = dm355_edma_info, - .num_resources = ARRAY_SIZE(edma_resources), - .resource = edma_resources, +static const struct platform_device_info dm355_edma_device __initconst = { + .name = "edma", + .id = 0, + .dma_mask = DMA_BIT_MASK(32), + .res = edma_resources, + .num_res = ARRAY_SIZE(edma_resources), + .data = &dm355_edma_pdata, + .size_data = sizeof(dm355_edma_pdata), }; static struct resource dm355_asp1_resources[] = { @@ -1062,13 +1059,18 @@ int __init dm355_init_video(struct vpfe_config *vpfe_cfg, static int __init dm355_init_devices(void) { + struct platform_device *edma_pdev; int ret = 0; if (!cpu_is_davinci_dm355()) return 0; davinci_cfg_reg(DM355_INT_EDMA_CC); - platform_device_register(&dm355_edma_device); + edma_pdev = platform_device_register_full(&dm355_edma_device); + if (IS_ERR(edma_pdev)) { + pr_warn("%s: Failed to register eDMA\n", __func__); + return PTR_ERR(edma_pdev); + } ret = davinci_init_wdt(); if (ret) diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c index 6a890a8..2068cbe 100644 --- a/arch/arm/mach-davinci/dm365.c +++ b/arch/arm/mach-davinci/dm365.c @@ -853,8 +853,7 @@ static u8 dm365_default_priorities[DAVINCI_N_AINTC_IRQ] = { }; /* Four Transfer Controllers on DM365 */ -static s8 -dm365_queue_priority_mapping[][2] = { +static s8 dm365_queue_priority_mapping[][2] = { /* {event queue no, Priority} */ {0, 7}, {1, 7}, @@ -863,53 +862,49 @@ dm365_queue_priority_mapping[][2] = { {-1, -1}, }; -static struct edma_soc_info edma_cc0_info = { +static struct edma_soc_info dm365_edma_pdata = { .queue_priority_mapping = dm365_queue_priority_mapping, .default_queue = EVENTQ_3, }; -static struct edma_soc_info *dm365_edma_info[EDMA_MAX_CC] = { - &edma_cc0_info, -}; - static struct resource edma_resources[] = { { - .name = "edma_cc0", + .name = "edma3_cc", .start = 0x01c00000, .end = 0x01c00000 + SZ_64K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc0", + .name = "edma3_tc0", .start = 0x01c10000, .end = 0x01c10000 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc1", + .name = "edma3_tc1", .start = 0x01c10400, .end = 0x01c10400 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc2", + .name = "edma3_tc2", .start = 0x01c10800, .end = 0x01c10800 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc3", + .name = "edma3_tc3", .start = 0x01c10c00, .end = 0x01c10c00 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma0", + .name = "edma3_ccint", .start = IRQ_CCINT0, .flags = IORESOURCE_IRQ, }, { - .name = "edma0_err", + .name = "edma3_ccerrint", .start = IRQ_CCERRINT, .flags = IORESOURCE_IRQ, }, @@ -919,7 +914,7 @@ static struct resource edma_resources[] = { static struct platform_device dm365_edma_device = { .name = "edma", .id = 0, - .dev.platform_data = dm365_edma_info, + .dev.platform_data = &dm365_edma_pdata, .num_resources = ARRAY_SIZE(edma_resources), .resource = edma_resources, }; diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c index dc52657..d38f504 100644 --- a/arch/arm/mach-davinci/dm644x.c +++ b/arch/arm/mach-davinci/dm644x.c @@ -498,61 +498,58 @@ static u8 dm644x_default_priorities[DAVINCI_N_AINTC_IRQ] = { /*----------------------------------------------------------------------*/ -static s8 -queue_priority_mapping[][2] = { +static s8 queue_priority_mapping[][2] = { /* {event queue no, Priority} */ {0, 3}, {1, 7}, {-1, -1}, }; -static struct edma_soc_info edma_cc0_info = { +static struct edma_soc_info dm644x_edma_pdata = { .queue_priority_mapping = queue_priority_mapping, .default_queue = EVENTQ_1, }; -static struct edma_soc_info *dm644x_edma_info[EDMA_MAX_CC] = { - &edma_cc0_info, -}; - static struct resource edma_resources[] = { { - .name = "edma_cc0", + .name = "edma3_cc", .start = 0x01c00000, .end = 0x01c00000 + SZ_64K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc0", + .name = "edma3_tc0", .start = 0x01c10000, .end = 0x01c10000 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc1", + .name = "edma3_tc1", .start = 0x01c10400, .end = 0x01c10400 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma0", + .name = "edma3_ccint", .start = IRQ_CCINT0, .flags = IORESOURCE_IRQ, }, { - .name = "edma0_err", + .name = "edma3_ccerrint", .start = IRQ_CCERRINT, .flags = IORESOURCE_IRQ, }, /* not using TC*_ERR */ }; -static struct platform_device dm644x_edma_device = { - .name = "edma", - .id = 0, - .dev.platform_data = dm644x_edma_info, - .num_resources = ARRAY_SIZE(edma_resources), - .resource = edma_resources, +static const struct platform_device_info dm644x_edma_device __initconst = { + .name = "edma", + .id = 0, + .dma_mask = DMA_BIT_MASK(32), + .res = edma_resources, + .num_res = ARRAY_SIZE(edma_resources), + .data = &dm644x_edma_pdata, + .size_data = sizeof(dm644x_edma_pdata), }; /* DM6446 EVM uses ASP0; line-out is a pair of RCA jacks */ @@ -950,12 +947,17 @@ int __init dm644x_init_video(struct vpfe_config *vpfe_cfg, static int __init dm644x_init_devices(void) { + struct platform_device *edma_pdev; int ret = 0; if (!cpu_is_davinci_dm644x()) return 0; - platform_device_register(&dm644x_edma_device); + edma_pdev = platform_device_register_full(&dm644x_edma_device); + if (IS_ERR(edma_pdev)) { + pr_warn("%s: Failed to register eDMA\n", __func__); + return PTR_ERR(edma_pdev); + } platform_device_register(&dm644x_mdio_device); platform_device_register(&dm644x_emac_device); diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c index 3f842bb..70eb427 100644 --- a/arch/arm/mach-davinci/dm646x.c +++ b/arch/arm/mach-davinci/dm646x.c @@ -531,8 +531,7 @@ static u8 dm646x_default_priorities[DAVINCI_N_AINTC_IRQ] = { /*----------------------------------------------------------------------*/ /* Four Transfer Controllers on DM646x */ -static s8 -dm646x_queue_priority_mapping[][2] = { +static s8 dm646x_queue_priority_mapping[][2] = { /* {event queue no, Priority} */ {0, 4}, {1, 0}, @@ -541,65 +540,63 @@ dm646x_queue_priority_mapping[][2] = { {-1, -1}, }; -static struct edma_soc_info edma_cc0_info = { +static struct edma_soc_info dm646x_edma_pdata = { .queue_priority_mapping = dm646x_queue_priority_mapping, .default_queue = EVENTQ_1, }; -static struct edma_soc_info *dm646x_edma_info[EDMA_MAX_CC] = { - &edma_cc0_info, -}; - static struct resource edma_resources[] = { { - .name = "edma_cc0", + .name = "edma3_cc", .start = 0x01c00000, .end = 0x01c00000 + SZ_64K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc0", + .name = "edma3_tc0", .start = 0x01c10000, .end = 0x01c10000 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc1", + .name = "edma3_tc1", .start = 0x01c10400, .end = 0x01c10400 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc2", + .name = "edma3_tc2", .start = 0x01c10800, .end = 0x01c10800 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma_tc3", + .name = "edma3_tc3", .start = 0x01c10c00, .end = 0x01c10c00 + SZ_1K - 1, .flags = IORESOURCE_MEM, }, { - .name = "edma0", + .name = "edma3_ccint", .start = IRQ_CCINT0, .flags = IORESOURCE_IRQ, }, { - .name = "edma0_err", + .name = "edma3_ccerrint", .start = IRQ_CCERRINT, .flags = IORESOURCE_IRQ, }, /* not using TC*_ERR */ }; -static struct platform_device dm646x_edma_device = { - .name = "edma", - .id = 0, - .dev.platform_data = dm646x_edma_info, - .num_resources = ARRAY_SIZE(edma_resources), - .resource = edma_resources, +static const struct platform_device_info dm646x_edma_device __initconst = { + .name = "edma", + .id = 0, + .dma_mask = DMA_BIT_MASK(32), + .res = edma_resources, + .num_res = ARRAY_SIZE(edma_resources), + .data = &dm646x_edma_pdata, + .size_data = sizeof(dm646x_edma_pdata), }; static struct resource dm646x_mcasp0_resources[] = { @@ -936,9 +933,12 @@ void dm646x_setup_vpif(struct vpif_display_config *display_config, int __init dm646x_init_edma(struct edma_rsv_info *rsv) { - edma_cc0_info.rsv = rsv; + struct platform_device *edma_pdev; + + dm646x_edma_pdata.rsv = rsv; - return platform_device_register(&dm646x_edma_device); + edma_pdev = platform_device_register_full(&dm646x_edma_device); + return IS_ERR(edma_pdev) ? PTR_ERR(edma_pdev) : 0; } void __init dm646x_init(void) diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig index 33d1460..ddf9124 100644 --- a/arch/arm/mach-omap2/Kconfig +++ b/arch/arm/mach-omap2/Kconfig @@ -96,7 +96,6 @@ config ARCH_OMAP2PLUS select OMAP_GPMC select PINCTRL select SOC_BUS - select TI_PRIV_EDMA select OMAP_IRQCHIP help Systems based on OMAP2, OMAP3, OMAP4 or OMAP5 diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c index 1d8b147..b4cb3bd 100644 --- a/arch/avr32/mach-at32ap/at32ap700x.c +++ b/arch/avr32/mach-at32ap/at32ap700x.c @@ -603,18 +603,11 @@ static void __init genclk_init_parent(struct clk *clk) clk->parent = parent; } -static struct dw_dma_platform_data dw_dmac0_data = { - .nr_channels = 3, - .block_size = 4095U, - .nr_masters = 2, - .data_width = { 2, 2 }, -}; - static struct resource dw_dmac0_resource[] = { PBMEM(0xff200000), IRQ(2), }; -DEFINE_DEV_DATA(dw_dmac, 0); +DEFINE_DEV(dw_dmac, 0); DEV_CLK(hclk, dw_dmac0, hsb, 10); /* -------------------------------------------------------------------- diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index b458475..e6cd1a3 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -229,7 +229,7 @@ config IMX_SDMA Support the i.MX SDMA engine. This engine is integrated into Freescale i.MX25/31/35/51/53/6 chips. -config IDMA64 +config INTEL_IDMA64 tristate "Intel integrated DMA 64-bit support" select DMA_ENGINE select DMA_VIRTUAL_CHANNELS @@ -486,7 +486,7 @@ config TI_EDMA depends on ARCH_DAVINCI || ARCH_OMAP || ARCH_KEYSTONE select DMA_ENGINE select DMA_VIRTUAL_CHANNELS - select TI_PRIV_EDMA + select TI_DMA_CROSSBAR if ARCH_OMAP default n help Enable support for the TI EDMA controller. This DMA diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile index 7711a71..ef9c099 100644 --- a/drivers/dma/Makefile +++ b/drivers/dma/Makefile @@ -34,7 +34,7 @@ obj-$(CONFIG_HSU_DMA) += hsu/ obj-$(CONFIG_IMG_MDC_DMA) += img-mdc-dma.o obj-$(CONFIG_IMX_DMA) += imx-dma.o obj-$(CONFIG_IMX_SDMA) += imx-sdma.o -obj-$(CONFIG_IDMA64) += idma64.o +obj-$(CONFIG_INTEL_IDMA64) += idma64.o obj-$(CONFIG_INTEL_IOATDMA) += ioat/ obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o obj-$(CONFIG_INTEL_MIC_X100_DMA) += mic_x100_dma.o diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c index 981a38f..16d0daa 100644 --- a/drivers/dma/acpi-dma.c +++ b/drivers/dma/acpi-dma.c @@ -161,10 +161,8 @@ int acpi_dma_controller_register(struct device *dev, return -EINVAL; /* Check if the device was enumerated by ACPI */ - if (!ACPI_HANDLE(dev)) - return -EINVAL; - - if (acpi_bus_get_device(ACPI_HANDLE(dev), &adev)) + adev = ACPI_COMPANION(dev); + if (!adev) return -EINVAL; adma = kzalloc(sizeof(*adma), GFP_KERNEL); @@ -359,10 +357,11 @@ struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev, int found; /* Check if the device was enumerated by ACPI */ - if (!dev || !ACPI_HANDLE(dev)) + if (!dev) return ERR_PTR(-ENODEV); - if (acpi_bus_get_device(ACPI_HANDLE(dev), &adev)) + adev = ACPI_COMPANION(dev); + if (!adev) return ERR_PTR(-ENODEV); memset(&pdata, 0, sizeof(pdata)); diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 58d4062..4e55239 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -458,10 +458,10 @@ atc_chain_complete(struct at_dma_chan *atchan, struct at_desc *desc) dma_cookie_complete(txd); /* If the transfer was a memset, free our temporary buffer */ - if (desc->memset) { + if (desc->memset_buffer) { dma_pool_free(atdma->memset_pool, desc->memset_vaddr, desc->memset_paddr); - desc->memset = false; + desc->memset_buffer = false; } /* move children to free_list */ @@ -881,6 +881,46 @@ err_desc_get: return NULL; } +static struct at_desc *atc_create_memset_desc(struct dma_chan *chan, + dma_addr_t psrc, + dma_addr_t pdst, + size_t len) +{ + struct at_dma_chan *atchan = to_at_dma_chan(chan); + struct at_desc *desc; + size_t xfer_count; + + u32 ctrla = ATC_SRC_WIDTH(2) | ATC_DST_WIDTH(2); + u32 ctrlb = ATC_DEFAULT_CTRLB | ATC_IEN | + ATC_SRC_ADDR_MODE_FIXED | + ATC_DST_ADDR_MODE_INCR | + ATC_FC_MEM2MEM; + + xfer_count = len >> 2; + if (xfer_count > ATC_BTSIZE_MAX) { + dev_err(chan2dev(chan), "%s: buffer is too big\n", + __func__); + return NULL; + } + + desc = atc_desc_get(atchan); + if (!desc) { + dev_err(chan2dev(chan), "%s: can't get a descriptor\n", + __func__); + return NULL; + } + + desc->lli.saddr = psrc; + desc->lli.daddr = pdst; + desc->lli.ctrla = ctrla | xfer_count; + desc->lli.ctrlb = ctrlb; + + desc->txd.cookie = 0; + desc->len = len; + + return desc; +} + /** * atc_prep_dma_memset - prepare a memcpy operation * @chan: the channel to prepare operation on @@ -893,12 +933,10 @@ static struct dma_async_tx_descriptor * atc_prep_dma_memset(struct dma_chan *chan, dma_addr_t dest, int value, size_t len, unsigned long flags) { - struct at_dma_chan *atchan = to_at_dma_chan(chan); struct at_dma *atdma = to_at_dma(chan->device); - struct at_desc *desc = NULL; - size_t xfer_count; - u32 ctrla; - u32 ctrlb; + struct at_desc *desc; + void __iomem *vaddr; + dma_addr_t paddr; dev_vdbg(chan2dev(chan), "%s: d0x%x v0x%x l0x%zx f0x%lx\n", __func__, dest, value, len, flags); @@ -914,61 +952,117 @@ atc_prep_dma_memset(struct dma_chan *chan, dma_addr_t dest, int value, return NULL; } - xfer_count = len >> 2; - if (xfer_count > ATC_BTSIZE_MAX) { - dev_err(chan2dev(chan), "%s: buffer is too big\n", + vaddr = dma_pool_alloc(atdma->memset_pool, GFP_ATOMIC, &paddr); + if (!vaddr) { + dev_err(chan2dev(chan), "%s: couldn't allocate buffer\n", __func__); return NULL; } + *(u32*)vaddr = value; - ctrlb = ATC_DEFAULT_CTRLB | ATC_IEN - | ATC_SRC_ADDR_MODE_FIXED - | ATC_DST_ADDR_MODE_INCR - | ATC_FC_MEM2MEM; + desc = atc_create_memset_desc(chan, paddr, dest, len); + if (!desc) { + dev_err(chan2dev(chan), "%s: couldn't get a descriptor\n", + __func__); + goto err_free_buffer; + } - ctrla = ATC_SRC_WIDTH(2) | - ATC_DST_WIDTH(2); + desc->memset_paddr = paddr; + desc->memset_vaddr = vaddr; + desc->memset_buffer = true; - desc = atc_desc_get(atchan); - if (!desc) { - dev_err(chan2dev(chan), "%s: can't get a descriptor\n", + desc->txd.cookie = -EBUSY; + desc->total_len = len; + + /* set end-of-link on the descriptor */ + set_desc_eol(desc); + + desc->txd.flags = flags; + + return &desc->txd; + +err_free_buffer: + dma_pool_free(atdma->memset_pool, vaddr, paddr); + return NULL; +} + +static struct dma_async_tx_descriptor * +atc_prep_dma_memset_sg(struct dma_chan *chan, + struct scatterlist *sgl, + unsigned int sg_len, int value, + unsigned long flags) +{ + struct at_dma_chan *atchan = to_at_dma_chan(chan); + struct at_dma *atdma = to_at_dma(chan->device); + struct at_desc *desc = NULL, *first = NULL, *prev = NULL; + struct scatterlist *sg; + void __iomem *vaddr; + dma_addr_t paddr; + size_t total_len = 0; + int i; + + dev_vdbg(chan2dev(chan), "%s: v0x%x l0x%zx f0x%lx\n", __func__, + value, sg_len, flags); + + if (unlikely(!sgl || !sg_len)) { + dev_dbg(chan2dev(chan), "%s: scatterlist is empty!\n", __func__); return NULL; } - desc->memset_vaddr = dma_pool_alloc(atdma->memset_pool, GFP_ATOMIC, - &desc->memset_paddr); - if (!desc->memset_vaddr) { + vaddr = dma_pool_alloc(atdma->memset_pool, GFP_ATOMIC, &paddr); + if (!vaddr) { dev_err(chan2dev(chan), "%s: couldn't allocate buffer\n", __func__); - goto err_put_desc; + return NULL; } + *(u32*)vaddr = value; - *desc->memset_vaddr = value; - desc->memset = true; + for_each_sg(sgl, sg, sg_len, i) { + dma_addr_t dest = sg_dma_address(sg); + size_t len = sg_dma_len(sg); - desc->lli.saddr = desc->memset_paddr; - desc->lli.daddr = dest; - desc->lli.ctrla = ctrla | xfer_count; - desc->lli.ctrlb = ctrlb; + dev_vdbg(chan2dev(chan), "%s: d0x%08x, l0x%zx\n", + __func__, dest, len); - desc->txd.cookie = -EBUSY; - desc->len = len; - desc->total_len = len; + if (!is_dma_fill_aligned(chan->device, dest, 0, len)) { + dev_err(chan2dev(chan), "%s: buffer is not aligned\n", + __func__); + goto err_put_desc; + } + + desc = atc_create_memset_desc(chan, paddr, dest, len); + if (!desc) + goto err_put_desc; + + atc_desc_chain(&first, &prev, desc); + + total_len += len; + } + + /* + * Only set the buffer pointers on the last descriptor to + * avoid free'ing while we have our transfer still going + */ + desc->memset_paddr = paddr; + desc->memset_vaddr = vaddr; + desc->memset_buffer = true; + + first->txd.cookie = -EBUSY; + first->total_len = total_len; /* set end-of-link on the descriptor */ set_desc_eol(desc); - desc->txd.flags = flags; + first->txd.flags = flags; - return &desc->txd; + return &first->txd; err_put_desc: - atc_desc_put(atchan, desc); + atc_desc_put(atchan, first); return NULL; } - /** * atc_prep_slave_sg - prepare descriptors for a DMA_SLAVE transaction * @chan: DMA channel @@ -1851,6 +1945,7 @@ static int __init at_dma_probe(struct platform_device *pdev) dma_cap_set(DMA_INTERLEAVE, at91sam9g45_config.cap_mask); dma_cap_set(DMA_MEMCPY, at91sam9g45_config.cap_mask); dma_cap_set(DMA_MEMSET, at91sam9g45_config.cap_mask); + dma_cap_set(DMA_MEMSET_SG, at91sam9g45_config.cap_mask); dma_cap_set(DMA_PRIVATE, at91sam9g45_config.cap_mask); dma_cap_set(DMA_SLAVE, at91sam9g45_config.cap_mask); dma_cap_set(DMA_SG, at91sam9g45_config.cap_mask); @@ -1972,6 +2067,7 @@ static int __init at_dma_probe(struct platform_device *pdev) if (dma_has_cap(DMA_MEMSET, atdma->dma_common.cap_mask)) { atdma->dma_common.device_prep_dma_memset = atc_prep_dma_memset; + atdma->dma_common.device_prep_dma_memset_sg = atc_prep_dma_memset_sg; atdma->dma_common.fill_align = DMAENGINE_ALIGN_4_BYTES; } diff --git a/drivers/dma/at_hdmac_regs.h b/drivers/dma/at_hdmac_regs.h index c3bebbe..d1cfc8c 100644 --- a/drivers/dma/at_hdmac_regs.h +++ b/drivers/dma/at_hdmac_regs.h @@ -202,7 +202,7 @@ struct at_desc { size_t src_hole; /* Memset temporary buffer */ - bool memset; + bool memset_buffer; dma_addr_t memset_paddr; int *memset_vaddr; }; diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index dd24375..b5e132d 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -938,13 +938,19 @@ at_xdmac_prep_interleaved(struct dma_chan *chan, { struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan); struct at_xdmac_desc *prev = NULL, *first = NULL; - struct data_chunk *chunk, *prev_chunk = NULL; dma_addr_t dst_addr, src_addr; - size_t dst_skip, src_skip, len = 0; - size_t prev_dst_icg = 0, prev_src_icg = 0; + size_t src_skip = 0, dst_skip = 0, len = 0; + struct data_chunk *chunk; int i; - if (!xt || (xt->numf != 1) || (xt->dir != DMA_MEM_TO_MEM)) + if (!xt || !xt->numf || (xt->dir != DMA_MEM_TO_MEM)) + return NULL; + + /* + * TODO: Handle the case where we have to repeat a chain of + * descriptors... + */ + if ((xt->numf > 1) && (xt->frame_size > 1)) return NULL; dev_dbg(chan2dev(chan), "%s: src=0x%08x, dest=0x%08x, numf=%d, frame_size=%d, flags=0x%lx\n", @@ -954,66 +960,60 @@ at_xdmac_prep_interleaved(struct dma_chan *chan, src_addr = xt->src_start; dst_addr = xt->dst_start; - for (i = 0; i < xt->frame_size; i++) { - struct at_xdmac_desc *desc; - size_t src_icg, dst_icg; + if (xt->numf > 1) { + first = at_xdmac_interleaved_queue_desc(chan, atchan, + NULL, + src_addr, dst_addr, + xt, xt->sgl); + for (i = 0; i < xt->numf; i++) + at_xdmac_increment_block_count(chan, first); - chunk = xt->sgl + i; + dev_dbg(chan2dev(chan), "%s: add desc 0x%p to descs_list 0x%p\n", + __func__, first, first); + list_add_tail(&first->desc_node, &first->descs_list); + } else { + for (i = 0; i < xt->frame_size; i++) { + size_t src_icg = 0, dst_icg = 0; + struct at_xdmac_desc *desc; - dst_icg = dmaengine_get_dst_icg(xt, chunk); - src_icg = dmaengine_get_src_icg(xt, chunk); + chunk = xt->sgl + i; - src_skip = chunk->size + src_icg; - dst_skip = chunk->size + dst_icg; + dst_icg = dmaengine_get_dst_icg(xt, chunk); + src_icg = dmaengine_get_src_icg(xt, chunk); - dev_dbg(chan2dev(chan), - "%s: chunk size=%d, src icg=%d, dst icg=%d\n", - __func__, chunk->size, src_icg, dst_icg); + src_skip = chunk->size + src_icg; + dst_skip = chunk->size + dst_icg; - /* - * Handle the case where we just have the same - * transfer to setup, we can just increase the - * block number and reuse the same descriptor. - */ - if (prev_chunk && prev && - (prev_chunk->size == chunk->size) && - (prev_src_icg == src_icg) && - (prev_dst_icg == dst_icg)) { dev_dbg(chan2dev(chan), - "%s: same configuration that the previous chunk, merging the descriptors...\n", - __func__); - at_xdmac_increment_block_count(chan, prev); - continue; - } - - desc = at_xdmac_interleaved_queue_desc(chan, atchan, - prev, - src_addr, dst_addr, - xt, chunk); - if (!desc) { - list_splice_init(&first->descs_list, - &atchan->free_descs_list); - return NULL; - } + "%s: chunk size=%d, src icg=%d, dst icg=%d\n", + __func__, chunk->size, src_icg, dst_icg); + + desc = at_xdmac_interleaved_queue_desc(chan, atchan, + prev, + src_addr, dst_addr, + xt, chunk); + if (!desc) { + list_splice_init(&first->descs_list, + &atchan->free_descs_list); + return NULL; + } - if (!first) - first = desc; + if (!first) + first = desc; - dev_dbg(chan2dev(chan), "%s: add desc 0x%p to descs_list 0x%p\n", - __func__, desc, first); - list_add_tail(&desc->desc_node, &first->descs_list); + dev_dbg(chan2dev(chan), "%s: add desc 0x%p to descs_list 0x%p\n", + __func__, desc, first); + list_add_tail(&desc->desc_node, &first->descs_list); - if (xt->src_sgl) - src_addr += src_skip; + if (xt->src_sgl) + src_addr += src_skip; - if (xt->dst_sgl) - dst_addr += dst_skip; + if (xt->dst_sgl) + dst_addr += dst_skip; - len += chunk->size; - prev_chunk = chunk; - prev_dst_icg = dst_icg; - prev_src_icg = src_icg; - prev = desc; + len += chunk->size; + prev = desc; + } } first->tx_dma_desc.cookie = -EBUSY; diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 09479d4..3ecec14 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -1074,11 +1074,9 @@ static void dmaengine_destroy_unmap_pool(void) for (i = 0; i < ARRAY_SIZE(unmap_pool); i++) { struct dmaengine_unmap_pool *p = &unmap_pool[i]; - if (p->pool) - mempool_destroy(p->pool); + mempool_destroy(p->pool); p->pool = NULL; - if (p->cache) - kmem_cache_destroy(p->cache); + kmem_cache_destroy(p->cache); p->cache = NULL; } } diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index bedce03..7067b6d 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -163,7 +163,7 @@ static void dwc_initialize(struct dw_dma_chan *dwc) /*----------------------------------------------------------------------*/ -static inline unsigned int dwc_fast_fls(unsigned long long v) +static inline unsigned int dwc_fast_ffs(unsigned long long v) { /* * We can be a lot more clever here, but this should take care @@ -712,7 +712,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, dw->data_width[dwc->dst_master]); src_width = dst_width = min_t(unsigned int, data_width, - dwc_fast_fls(src | dest | len)); + dwc_fast_ffs(src | dest | len)); ctllo = DWC_DEFAULT_CTLLO(chan) | DWC_CTLL_DST_WIDTH(dst_width) @@ -791,7 +791,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, switch (direction) { case DMA_MEM_TO_DEV: - reg_width = __fls(sconfig->dst_addr_width); + reg_width = __ffs(sconfig->dst_addr_width); reg = sconfig->dst_addr; ctllo = (DWC_DEFAULT_CTLLO(chan) | DWC_CTLL_DST_WIDTH(reg_width) @@ -811,7 +811,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, len = sg_dma_len(sg); mem_width = min_t(unsigned int, - data_width, dwc_fast_fls(mem | len)); + data_width, dwc_fast_ffs(mem | len)); slave_sg_todev_fill_desc: desc = dwc_desc_get(dwc); @@ -848,7 +848,7 @@ slave_sg_todev_fill_desc: } break; case DMA_DEV_TO_MEM: - reg_width = __fls(sconfig->src_addr_width); + reg_width = __ffs(sconfig->src_addr_width); reg = sconfig->src_addr; ctllo = (DWC_DEFAULT_CTLLO(chan) | DWC_CTLL_SRC_WIDTH(reg_width) @@ -868,7 +868,7 @@ slave_sg_todev_fill_desc: len = sg_dma_len(sg); mem_width = min_t(unsigned int, - data_width, dwc_fast_fls(mem | len)); + data_width, dwc_fast_ffs(mem | len)); slave_sg_fromdev_fill_desc: desc = dwc_desc_get(dwc); @@ -1499,9 +1499,8 @@ EXPORT_SYMBOL(dw_dma_cyclic_free); int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) { struct dw_dma *dw; - bool autocfg; + bool autocfg = false; unsigned int dw_params; - unsigned int nr_channels; unsigned int max_blk_size = 0; int err; int i; @@ -1515,33 +1514,42 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) pm_runtime_get_sync(chip->dev); - dw_params = dma_read_byaddr(chip->regs, DW_PARAMS); - autocfg = dw_params >> DW_PARAMS_EN & 0x1; + if (!pdata) { + dw_params = dma_read_byaddr(chip->regs, DW_PARAMS); + dev_dbg(chip->dev, "DW_PARAMS: 0x%08x\n", dw_params); - dev_dbg(chip->dev, "DW_PARAMS: 0x%08x\n", dw_params); + autocfg = dw_params >> DW_PARAMS_EN & 1; + if (!autocfg) { + err = -EINVAL; + goto err_pdata; + } - if (!pdata && autocfg) { pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { err = -ENOMEM; goto err_pdata; } + /* Get hardware configuration parameters */ + pdata->nr_channels = (dw_params >> DW_PARAMS_NR_CHAN & 7) + 1; + pdata->nr_masters = (dw_params >> DW_PARAMS_NR_MASTER & 3) + 1; + for (i = 0; i < pdata->nr_masters; i++) { + pdata->data_width[i] = + (dw_params >> DW_PARAMS_DATA_WIDTH(i) & 3) + 2; + } + max_blk_size = dma_readl(dw, MAX_BLK_SIZE); + /* Fill platform data with the default values */ pdata->is_private = true; + pdata->is_memcpy = true; pdata->chan_allocation_order = CHAN_ALLOCATION_ASCENDING; pdata->chan_priority = CHAN_PRIORITY_ASCENDING; - } else if (!pdata || pdata->nr_channels > DW_DMA_MAX_NR_CHANNELS) { + } else if (pdata->nr_channels > DW_DMA_MAX_NR_CHANNELS) { err = -EINVAL; goto err_pdata; } - if (autocfg) - nr_channels = (dw_params >> DW_PARAMS_NR_CHAN & 0x7) + 1; - else - nr_channels = pdata->nr_channels; - - dw->chan = devm_kcalloc(chip->dev, nr_channels, sizeof(*dw->chan), + dw->chan = devm_kcalloc(chip->dev, pdata->nr_channels, sizeof(*dw->chan), GFP_KERNEL); if (!dw->chan) { err = -ENOMEM; @@ -1549,22 +1557,12 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) } /* Get hardware configuration parameters */ - if (autocfg) { - max_blk_size = dma_readl(dw, MAX_BLK_SIZE); - - dw->nr_masters = (dw_params >> DW_PARAMS_NR_MASTER & 3) + 1; - for (i = 0; i < dw->nr_masters; i++) { - dw->data_width[i] = - (dw_params >> DW_PARAMS_DATA_WIDTH(i) & 3) + 2; - } - } else { - dw->nr_masters = pdata->nr_masters; - for (i = 0; i < dw->nr_masters; i++) - dw->data_width[i] = pdata->data_width[i]; - } + dw->nr_masters = pdata->nr_masters; + for (i = 0; i < dw->nr_masters; i++) + dw->data_width[i] = pdata->data_width[i]; /* Calculate all channel mask before DMA setup */ - dw->all_chan_mask = (1 << nr_channels) - 1; + dw->all_chan_mask = (1 << pdata->nr_channels) - 1; /* Force dma off, just in case */ dw_dma_off(dw); @@ -1589,7 +1587,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) goto err_pdata; INIT_LIST_HEAD(&dw->dma.channels); - for (i = 0; i < nr_channels; i++) { + for (i = 0; i < pdata->nr_channels; i++) { struct dw_dma_chan *dwc = &dw->chan[i]; dwc->chan.device = &dw->dma; @@ -1602,7 +1600,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) /* 7 is highest priority & 0 is lowest. */ if (pdata->chan_priority == CHAN_PRIORITY_ASCENDING) - dwc->priority = nr_channels - i - 1; + dwc->priority = pdata->nr_channels - i - 1; else dwc->priority = i; @@ -1656,10 +1654,13 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) dma_writel(dw, CLEAR.DST_TRAN, dw->all_chan_mask); dma_writel(dw, CLEAR.ERROR, dw->all_chan_mask); - dma_cap_set(DMA_MEMCPY, dw->dma.cap_mask); + /* Set capabilities */ dma_cap_set(DMA_SLAVE, dw->dma.cap_mask); if (pdata->is_private) dma_cap_set(DMA_PRIVATE, dw->dma.cap_mask); + if (pdata->is_memcpy) + dma_cap_set(DMA_MEMCPY, dw->dma.cap_mask); + dw->dma.dev = chip->dev; dw->dma.device_alloc_chan_resources = dwc_alloc_chan_resources; dw->dma.device_free_chan_resources = dwc_free_chan_resources; @@ -1687,7 +1688,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) goto err_dma_register; dev_info(chip->dev, "DesignWare DMA Controller, %d channels\n", - nr_channels); + pdata->nr_channels); pm_runtime_put_sync_suspend(chip->dev); diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c index b144706..4c30fdd 100644 --- a/drivers/dma/dw/pci.c +++ b/drivers/dma/dw/pci.c @@ -15,12 +15,6 @@ #include "internal.h" -static struct dw_dma_platform_data dw_pci_pdata = { - .is_private = 1, - .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, - .chan_priority = CHAN_PRIORITY_ASCENDING, -}; - static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) { struct dw_dma_chip *chip; @@ -101,19 +95,19 @@ static const struct dev_pm_ops dw_pci_dev_pm_ops = { static const struct pci_device_id dw_pci_id_table[] = { /* Medfield */ - { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata }, - { PCI_VDEVICE(INTEL, 0x0830), (kernel_ulong_t)&dw_pci_pdata }, + { PCI_VDEVICE(INTEL, 0x0827) }, + { PCI_VDEVICE(INTEL, 0x0830) }, /* BayTrail */ - { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_pdata }, - { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_pdata }, + { PCI_VDEVICE(INTEL, 0x0f06) }, + { PCI_VDEVICE(INTEL, 0x0f40) }, /* Braswell */ - { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_pci_pdata }, - { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_pci_pdata }, + { PCI_VDEVICE(INTEL, 0x2286) }, + { PCI_VDEVICE(INTEL, 0x22c0) }, /* Haswell */ - { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_pdata }, + { PCI_VDEVICE(INTEL, 0x9c60) }, { } }; MODULE_DEVICE_TABLE(pci, dw_pci_id_table); diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c index b2c3ae0..68a4815 100644 --- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -155,6 +155,7 @@ static int dw_probe(struct platform_device *pdev) struct dw_dma_chip *chip; struct device *dev = &pdev->dev; struct resource *mem; + const struct acpi_device_id *id; struct dw_dma_platform_data *pdata; int err; @@ -178,6 +179,11 @@ static int dw_probe(struct platform_device *pdev) pdata = dev_get_platdata(dev); if (!pdata) pdata = dw_dma_parse_dt(pdev); + if (!pdata && has_acpi_companion(dev)) { + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (id) + pdata = (struct dw_dma_platform_data *)id->driver_data; + } chip->dev = dev; @@ -246,8 +252,17 @@ MODULE_DEVICE_TABLE(of, dw_dma_of_id_table); #endif #ifdef CONFIG_ACPI +static struct dw_dma_platform_data dw_dma_acpi_pdata = { + .nr_channels = 8, + .is_private = true, + .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, + .chan_priority = CHAN_PRIORITY_ASCENDING, + .block_size = 4095, + .nr_masters = 2, +}; + static const struct acpi_device_id dw_dma_acpi_id_table[] = { - { "INTL9C60", 0 }, + { "INTL9C60", (kernel_ulong_t)&dw_dma_acpi_pdata }, { } }; MODULE_DEVICE_TABLE(acpi, dw_dma_acpi_id_table); diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 3e5d4f1..6b03e4e 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -25,28 +25,93 @@ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/of.h> +#include <linux/of_dma.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/pm_runtime.h> #include <linux/platform_data/edma.h> #include "dmaengine.h" #include "virt-dma.h" -/* - * This will go away when the private EDMA API is folded - * into this driver and the platform device(s) are - * instantiated in the arch code. We can only get away - * with this simplification because DA8XX may not be built - * in the same kernel image with other DaVinci parts. This - * avoids having to sprinkle dmaengine driver platform devices - * and data throughout all the existing board files. - */ -#ifdef CONFIG_ARCH_DAVINCI_DA8XX -#define EDMA_CTLRS 2 -#define EDMA_CHANS 32 -#else -#define EDMA_CTLRS 1 -#define EDMA_CHANS 64 -#endif /* CONFIG_ARCH_DAVINCI_DA8XX */ +/* Offsets matching "struct edmacc_param" */ +#define PARM_OPT 0x00 +#define PARM_SRC 0x04 +#define PARM_A_B_CNT 0x08 +#define PARM_DST 0x0c +#define PARM_SRC_DST_BIDX 0x10 +#define PARM_LINK_BCNTRLD 0x14 +#define PARM_SRC_DST_CIDX 0x18 +#define PARM_CCNT 0x1c + +#define PARM_SIZE 0x20 + +/* Offsets for EDMA CC global channel registers and their shadows */ +#define SH_ER 0x00 /* 64 bits */ +#define SH_ECR 0x08 /* 64 bits */ +#define SH_ESR 0x10 /* 64 bits */ +#define SH_CER 0x18 /* 64 bits */ +#define SH_EER 0x20 /* 64 bits */ +#define SH_EECR 0x28 /* 64 bits */ +#define SH_EESR 0x30 /* 64 bits */ +#define SH_SER 0x38 /* 64 bits */ +#define SH_SECR 0x40 /* 64 bits */ +#define SH_IER 0x50 /* 64 bits */ +#define SH_IECR 0x58 /* 64 bits */ +#define SH_IESR 0x60 /* 64 bits */ +#define SH_IPR 0x68 /* 64 bits */ +#define SH_ICR 0x70 /* 64 bits */ +#define SH_IEVAL 0x78 +#define SH_QER 0x80 +#define SH_QEER 0x84 +#define SH_QEECR 0x88 +#define SH_QEESR 0x8c +#define SH_QSER 0x90 +#define SH_QSECR 0x94 +#define SH_SIZE 0x200 + +/* Offsets for EDMA CC global registers */ +#define EDMA_REV 0x0000 +#define EDMA_CCCFG 0x0004 +#define EDMA_QCHMAP 0x0200 /* 8 registers */ +#define EDMA_DMAQNUM 0x0240 /* 8 registers (4 on OMAP-L1xx) */ +#define EDMA_QDMAQNUM 0x0260 +#define EDMA_QUETCMAP 0x0280 +#define EDMA_QUEPRI 0x0284 +#define EDMA_EMR 0x0300 /* 64 bits */ +#define EDMA_EMCR 0x0308 /* 64 bits */ +#define EDMA_QEMR 0x0310 +#define EDMA_QEMCR 0x0314 +#define EDMA_CCERR 0x0318 +#define EDMA_CCERRCLR 0x031c +#define EDMA_EEVAL 0x0320 +#define EDMA_DRAE 0x0340 /* 4 x 64 bits*/ +#define EDMA_QRAE 0x0380 /* 4 registers */ +#define EDMA_QUEEVTENTRY 0x0400 /* 2 x 16 registers */ +#define EDMA_QSTAT 0x0600 /* 2 registers */ +#define EDMA_QWMTHRA 0x0620 +#define EDMA_QWMTHRB 0x0624 +#define EDMA_CCSTAT 0x0640 + +#define EDMA_M 0x1000 /* global channel registers */ +#define EDMA_ECR 0x1008 +#define EDMA_ECRH 0x100C +#define EDMA_SHADOW0 0x2000 /* 4 shadow regions */ +#define EDMA_PARM 0x4000 /* PaRAM entries */ + +#define PARM_OFFSET(param_no) (EDMA_PARM + ((param_no) << 5)) + +#define EDMA_DCHMAP 0x0100 /* 64 registers */ + +/* CCCFG register */ +#define GET_NUM_DMACH(x) (x & 0x7) /* bits 0-2 */ +#define GET_NUM_QDMACH(x) (x & 0x70 >> 4) /* bits 4-6 */ +#define GET_NUM_PAENTRY(x) ((x & 0x7000) >> 12) /* bits 12-14 */ +#define GET_NUM_EVQUE(x) ((x & 0x70000) >> 16) /* bits 16-18 */ +#define GET_NUM_REGN(x) ((x & 0x300000) >> 20) /* bits 20-21 */ +#define CHMAP_EXIST BIT(24) /* * Max of 20 segments per channel to conserve PaRAM slots @@ -59,6 +124,37 @@ #define EDMA_MAX_SLOTS MAX_NR_SG #define EDMA_DESCRIPTORS 16 +#define EDMA_CHANNEL_ANY -1 /* for edma_alloc_channel() */ +#define EDMA_SLOT_ANY -1 /* for edma_alloc_slot() */ +#define EDMA_CONT_PARAMS_ANY 1001 +#define EDMA_CONT_PARAMS_FIXED_EXACT 1002 +#define EDMA_CONT_PARAMS_FIXED_NOT_EXACT 1003 + +/* PaRAM slots are laid out like this */ +struct edmacc_param { + u32 opt; + u32 src; + u32 a_b_cnt; + u32 dst; + u32 src_dst_bidx; + u32 link_bcntrld; + u32 src_dst_cidx; + u32 ccnt; +} __packed; + +/* fields in edmacc_param.opt */ +#define SAM BIT(0) +#define DAM BIT(1) +#define SYNCDIM BIT(2) +#define STATIC BIT(3) +#define EDMA_FWID (0x07 << 8) +#define TCCMODE BIT(11) +#define EDMA_TCC(t) ((t) << 12) +#define TCINTEN BIT(20) +#define ITCINTEN BIT(21) +#define TCCHEN BIT(22) +#define ITCCHEN BIT(23) + struct edma_pset { u32 len; dma_addr_t addr; @@ -105,26 +201,524 @@ struct edma_desc { struct edma_cc; +struct edma_tc { + struct device_node *node; + u16 id; +}; + struct edma_chan { struct virt_dma_chan vchan; struct list_head node; struct edma_desc *edesc; struct edma_cc *ecc; + struct edma_tc *tc; int ch_num; bool alloced; + bool hw_triggered; int slot[EDMA_MAX_SLOTS]; int missed; struct dma_slave_config cfg; }; struct edma_cc { - int ctlr; + struct device *dev; + struct edma_soc_info *info; + void __iomem *base; + int id; + bool legacy_mode; + + /* eDMA3 resource information */ + unsigned num_channels; + unsigned num_qchannels; + unsigned num_region; + unsigned num_slots; + unsigned num_tc; + bool chmap_exist; + enum dma_event_q default_queue; + + /* + * The slot_inuse bit for each PaRAM slot is clear unless the slot is + * in use by Linux or if it is allocated to be used by DSP. + */ + unsigned long *slot_inuse; + struct dma_device dma_slave; - struct edma_chan slave_chans[EDMA_CHANS]; - int num_slave_chans; + struct dma_device *dma_memcpy; + struct edma_chan *slave_chans; + struct edma_tc *tc_list; int dummy_slot; }; +/* dummy param set used to (re)initialize parameter RAM slots */ +static const struct edmacc_param dummy_paramset = { + .link_bcntrld = 0xffff, + .ccnt = 1, +}; + +#define EDMA_BINDING_LEGACY 0 +#define EDMA_BINDING_TPCC 1 +static const struct of_device_id edma_of_ids[] = { + { + .compatible = "ti,edma3", + .data = (void *)EDMA_BINDING_LEGACY, + }, + { + .compatible = "ti,edma3-tpcc", + .data = (void *)EDMA_BINDING_TPCC, + }, + {} +}; + +static const struct of_device_id edma_tptc_of_ids[] = { + { .compatible = "ti,edma3-tptc", }, + {} +}; + +static inline unsigned int edma_read(struct edma_cc *ecc, int offset) +{ + return (unsigned int)__raw_readl(ecc->base + offset); +} + +static inline void edma_write(struct edma_cc *ecc, int offset, int val) +{ + __raw_writel(val, ecc->base + offset); +} + +static inline void edma_modify(struct edma_cc *ecc, int offset, unsigned and, + unsigned or) +{ + unsigned val = edma_read(ecc, offset); + + val &= and; + val |= or; + edma_write(ecc, offset, val); +} + +static inline void edma_and(struct edma_cc *ecc, int offset, unsigned and) +{ + unsigned val = edma_read(ecc, offset); + + val &= and; + edma_write(ecc, offset, val); +} + +static inline void edma_or(struct edma_cc *ecc, int offset, unsigned or) +{ + unsigned val = edma_read(ecc, offset); + + val |= or; + edma_write(ecc, offset, val); +} + +static inline unsigned int edma_read_array(struct edma_cc *ecc, int offset, + int i) +{ + return edma_read(ecc, offset + (i << 2)); +} + +static inline void edma_write_array(struct edma_cc *ecc, int offset, int i, + unsigned val) +{ + edma_write(ecc, offset + (i << 2), val); +} + +static inline void edma_modify_array(struct edma_cc *ecc, int offset, int i, + unsigned and, unsigned or) +{ + edma_modify(ecc, offset + (i << 2), and, or); +} + +static inline void edma_or_array(struct edma_cc *ecc, int offset, int i, + unsigned or) +{ + edma_or(ecc, offset + (i << 2), or); +} + +static inline void edma_or_array2(struct edma_cc *ecc, int offset, int i, int j, + unsigned or) +{ + edma_or(ecc, offset + ((i * 2 + j) << 2), or); +} + +static inline void edma_write_array2(struct edma_cc *ecc, int offset, int i, + int j, unsigned val) +{ + edma_write(ecc, offset + ((i * 2 + j) << 2), val); +} + +static inline unsigned int edma_shadow0_read(struct edma_cc *ecc, int offset) +{ + return edma_read(ecc, EDMA_SHADOW0 + offset); +} + +static inline unsigned int edma_shadow0_read_array(struct edma_cc *ecc, + int offset, int i) +{ + return edma_read(ecc, EDMA_SHADOW0 + offset + (i << 2)); +} + +static inline void edma_shadow0_write(struct edma_cc *ecc, int offset, + unsigned val) +{ + edma_write(ecc, EDMA_SHADOW0 + offset, val); +} + +static inline void edma_shadow0_write_array(struct edma_cc *ecc, int offset, + int i, unsigned val) +{ + edma_write(ecc, EDMA_SHADOW0 + offset + (i << 2), val); +} + +static inline unsigned int edma_param_read(struct edma_cc *ecc, int offset, + int param_no) +{ + return edma_read(ecc, EDMA_PARM + offset + (param_no << 5)); +} + +static inline void edma_param_write(struct edma_cc *ecc, int offset, + int param_no, unsigned val) +{ + edma_write(ecc, EDMA_PARM + offset + (param_no << 5), val); +} + +static inline void edma_param_modify(struct edma_cc *ecc, int offset, + int param_no, unsigned and, unsigned or) +{ + edma_modify(ecc, EDMA_PARM + offset + (param_no << 5), and, or); +} + +static inline void edma_param_and(struct edma_cc *ecc, int offset, int param_no, + unsigned and) +{ + edma_and(ecc, EDMA_PARM + offset + (param_no << 5), and); +} + +static inline void edma_param_or(struct edma_cc *ecc, int offset, int param_no, + unsigned or) +{ + edma_or(ecc, EDMA_PARM + offset + (param_no << 5), or); +} + +static inline void set_bits(int offset, int len, unsigned long *p) +{ + for (; len > 0; len--) + set_bit(offset + (len - 1), p); +} + +static inline void clear_bits(int offset, int len, unsigned long *p) +{ + for (; len > 0; len--) + clear_bit(offset + (len - 1), p); +} + +static void edma_assign_priority_to_queue(struct edma_cc *ecc, int queue_no, + int priority) +{ + int bit = queue_no * 4; + + edma_modify(ecc, EDMA_QUEPRI, ~(0x7 << bit), ((priority & 0x7) << bit)); +} + +static void edma_set_chmap(struct edma_chan *echan, int slot) +{ + struct edma_cc *ecc = echan->ecc; + int channel = EDMA_CHAN_SLOT(echan->ch_num); + + if (ecc->chmap_exist) { + slot = EDMA_CHAN_SLOT(slot); + edma_write_array(ecc, EDMA_DCHMAP, channel, (slot << 5)); + } +} + +static void edma_setup_interrupt(struct edma_chan *echan, bool enable) +{ + struct edma_cc *ecc = echan->ecc; + int channel = EDMA_CHAN_SLOT(echan->ch_num); + + if (enable) { + edma_shadow0_write_array(ecc, SH_ICR, channel >> 5, + BIT(channel & 0x1f)); + edma_shadow0_write_array(ecc, SH_IESR, channel >> 5, + BIT(channel & 0x1f)); + } else { + edma_shadow0_write_array(ecc, SH_IECR, channel >> 5, + BIT(channel & 0x1f)); + } +} + +/* + * paRAM slot management functions + */ +static void edma_write_slot(struct edma_cc *ecc, unsigned slot, + const struct edmacc_param *param) +{ + slot = EDMA_CHAN_SLOT(slot); + if (slot >= ecc->num_slots) + return; + memcpy_toio(ecc->base + PARM_OFFSET(slot), param, PARM_SIZE); +} + +static void edma_read_slot(struct edma_cc *ecc, unsigned slot, + struct edmacc_param *param) +{ + slot = EDMA_CHAN_SLOT(slot); + if (slot >= ecc->num_slots) + return; + memcpy_fromio(param, ecc->base + PARM_OFFSET(slot), PARM_SIZE); +} + +/** + * edma_alloc_slot - allocate DMA parameter RAM + * @ecc: pointer to edma_cc struct + * @slot: specific slot to allocate; negative for "any unused slot" + * + * This allocates a parameter RAM slot, initializing it to hold a + * dummy transfer. Slots allocated using this routine have not been + * mapped to a hardware DMA channel, and will normally be used by + * linking to them from a slot associated with a DMA channel. + * + * Normal use is to pass EDMA_SLOT_ANY as the @slot, but specific + * slots may be allocated on behalf of DSP firmware. + * + * Returns the number of the slot, else negative errno. + */ +static int edma_alloc_slot(struct edma_cc *ecc, int slot) +{ + if (slot > 0) { + slot = EDMA_CHAN_SLOT(slot); + /* Requesting entry paRAM slot for a HW triggered channel. */ + if (ecc->chmap_exist && slot < ecc->num_channels) + slot = EDMA_SLOT_ANY; + } + + if (slot < 0) { + if (ecc->chmap_exist) + slot = 0; + else + slot = ecc->num_channels; + for (;;) { + slot = find_next_zero_bit(ecc->slot_inuse, + ecc->num_slots, + slot); + if (slot == ecc->num_slots) + return -ENOMEM; + if (!test_and_set_bit(slot, ecc->slot_inuse)) + break; + } + } else if (slot >= ecc->num_slots) { + return -EINVAL; + } else if (test_and_set_bit(slot, ecc->slot_inuse)) { + return -EBUSY; + } + + edma_write_slot(ecc, slot, &dummy_paramset); + + return EDMA_CTLR_CHAN(ecc->id, slot); +} + +static void edma_free_slot(struct edma_cc *ecc, unsigned slot) +{ + slot = EDMA_CHAN_SLOT(slot); + if (slot >= ecc->num_slots) + return; + + edma_write_slot(ecc, slot, &dummy_paramset); + clear_bit(slot, ecc->slot_inuse); +} + +/** + * edma_link - link one parameter RAM slot to another + * @ecc: pointer to edma_cc struct + * @from: parameter RAM slot originating the link + * @to: parameter RAM slot which is the link target + * + * The originating slot should not be part of any active DMA transfer. + */ +static void edma_link(struct edma_cc *ecc, unsigned from, unsigned to) +{ + if (unlikely(EDMA_CTLR(from) != EDMA_CTLR(to))) + dev_warn(ecc->dev, "Ignoring eDMA instance for linking\n"); + + from = EDMA_CHAN_SLOT(from); + to = EDMA_CHAN_SLOT(to); + if (from >= ecc->num_slots || to >= ecc->num_slots) + return; + + edma_param_modify(ecc, PARM_LINK_BCNTRLD, from, 0xffff0000, + PARM_OFFSET(to)); +} + +/** + * edma_get_position - returns the current transfer point + * @ecc: pointer to edma_cc struct + * @slot: parameter RAM slot being examined + * @dst: true selects the dest position, false the source + * + * Returns the position of the current active slot + */ +static dma_addr_t edma_get_position(struct edma_cc *ecc, unsigned slot, + bool dst) +{ + u32 offs; + + slot = EDMA_CHAN_SLOT(slot); + offs = PARM_OFFSET(slot); + offs += dst ? PARM_DST : PARM_SRC; + + return edma_read(ecc, offs); +} + +/* + * Channels with event associations will be triggered by their hardware + * events, and channels without such associations will be triggered by + * software. (At this writing there is no interface for using software + * triggers except with channels that don't support hardware triggers.) + */ +static void edma_start(struct edma_chan *echan) +{ + struct edma_cc *ecc = echan->ecc; + int channel = EDMA_CHAN_SLOT(echan->ch_num); + int j = (channel >> 5); + unsigned int mask = BIT(channel & 0x1f); + + if (!echan->hw_triggered) { + /* EDMA channels without event association */ + dev_dbg(ecc->dev, "ESR%d %08x\n", j, + edma_shadow0_read_array(ecc, SH_ESR, j)); + edma_shadow0_write_array(ecc, SH_ESR, j, mask); + } else { + /* EDMA channel with event association */ + dev_dbg(ecc->dev, "ER%d %08x\n", j, + edma_shadow0_read_array(ecc, SH_ER, j)); + /* Clear any pending event or error */ + edma_write_array(ecc, EDMA_ECR, j, mask); + edma_write_array(ecc, EDMA_EMCR, j, mask); + /* Clear any SER */ + edma_shadow0_write_array(ecc, SH_SECR, j, mask); + edma_shadow0_write_array(ecc, SH_EESR, j, mask); + dev_dbg(ecc->dev, "EER%d %08x\n", j, + edma_shadow0_read_array(ecc, SH_EER, j)); + } +} + +static void edma_stop(struct edma_chan *echan) +{ + struct edma_cc *ecc = echan->ecc; + int channel = EDMA_CHAN_SLOT(echan->ch_num); + int j = (channel >> 5); + unsigned int mask = BIT(channel & 0x1f); + + edma_shadow0_write_array(ecc, SH_EECR, j, mask); + edma_shadow0_write_array(ecc, SH_ECR, j, mask); + edma_shadow0_write_array(ecc, SH_SECR, j, mask); + edma_write_array(ecc, EDMA_EMCR, j, mask); + + /* clear possibly pending completion interrupt */ + edma_shadow0_write_array(ecc, SH_ICR, j, mask); + + dev_dbg(ecc->dev, "EER%d %08x\n", j, + edma_shadow0_read_array(ecc, SH_EER, j)); + + /* REVISIT: consider guarding against inappropriate event + * chaining by overwriting with dummy_paramset. + */ +} + +/* + * Temporarily disable EDMA hardware events on the specified channel, + * preventing them from triggering new transfers + */ +static void edma_pause(struct edma_chan *echan) +{ + int channel = EDMA_CHAN_SLOT(echan->ch_num); + unsigned int mask = BIT(channel & 0x1f); + + edma_shadow0_write_array(echan->ecc, SH_EECR, channel >> 5, mask); +} + +/* Re-enable EDMA hardware events on the specified channel. */ +static void edma_resume(struct edma_chan *echan) +{ + int channel = EDMA_CHAN_SLOT(echan->ch_num); + unsigned int mask = BIT(channel & 0x1f); + + edma_shadow0_write_array(echan->ecc, SH_EESR, channel >> 5, mask); +} + +static void edma_trigger_channel(struct edma_chan *echan) +{ + struct edma_cc *ecc = echan->ecc; + int channel = EDMA_CHAN_SLOT(echan->ch_num); + unsigned int mask = BIT(channel & 0x1f); + + edma_shadow0_write_array(ecc, SH_ESR, (channel >> 5), mask); + + dev_dbg(ecc->dev, "ESR%d %08x\n", (channel >> 5), + edma_shadow0_read_array(ecc, SH_ESR, (channel >> 5))); +} + +static void edma_clean_channel(struct edma_chan *echan) +{ + struct edma_cc *ecc = echan->ecc; + int channel = EDMA_CHAN_SLOT(echan->ch_num); + int j = (channel >> 5); + unsigned int mask = BIT(channel & 0x1f); + + dev_dbg(ecc->dev, "EMR%d %08x\n", j, edma_read_array(ecc, EDMA_EMR, j)); + edma_shadow0_write_array(ecc, SH_ECR, j, mask); + /* Clear the corresponding EMR bits */ + edma_write_array(ecc, EDMA_EMCR, j, mask); + /* Clear any SER */ + edma_shadow0_write_array(ecc, SH_SECR, j, mask); + edma_write(ecc, EDMA_CCERRCLR, BIT(16) | BIT(1) | BIT(0)); +} + +/* Move channel to a specific event queue */ +static void edma_assign_channel_eventq(struct edma_chan *echan, + enum dma_event_q eventq_no) +{ + struct edma_cc *ecc = echan->ecc; + int channel = EDMA_CHAN_SLOT(echan->ch_num); + int bit = (channel & 0x7) * 4; + + /* default to low priority queue */ + if (eventq_no == EVENTQ_DEFAULT) + eventq_no = ecc->default_queue; + if (eventq_no >= ecc->num_tc) + return; + + eventq_no &= 7; + edma_modify_array(ecc, EDMA_DMAQNUM, (channel >> 3), ~(0x7 << bit), + eventq_no << bit); +} + +static int edma_alloc_channel(struct edma_chan *echan, + enum dma_event_q eventq_no) +{ + struct edma_cc *ecc = echan->ecc; + int channel = EDMA_CHAN_SLOT(echan->ch_num); + + /* ensure access through shadow region 0 */ + edma_or_array2(ecc, EDMA_DRAE, 0, channel >> 5, BIT(channel & 0x1f)); + + /* ensure no events are pending */ + edma_stop(echan); + + edma_setup_interrupt(echan, true); + + edma_assign_channel_eventq(echan, eventq_no); + + return 0; +} + +static void edma_free_channel(struct edma_chan *echan) +{ + /* ensure no events are pending */ + edma_stop(echan); + /* REVISIT should probably take out of shadow region 0 */ + edma_setup_interrupt(echan, false); +} + static inline struct edma_cc *to_edma_cc(struct dma_device *d) { return container_of(d, struct edma_cc, dma_slave); @@ -135,8 +729,7 @@ static inline struct edma_chan *to_edma_chan(struct dma_chan *c) return container_of(c, struct edma_chan, vchan.chan); } -static inline struct edma_desc -*to_edma_desc(struct dma_async_tx_descriptor *tx) +static inline struct edma_desc *to_edma_desc(struct dma_async_tx_descriptor *tx) { return container_of(tx, struct edma_desc, vdesc.tx); } @@ -149,20 +742,17 @@ static void edma_desc_free(struct virt_dma_desc *vdesc) /* Dispatch a queued descriptor to the controller (caller holds lock) */ static void edma_execute(struct edma_chan *echan) { + struct edma_cc *ecc = echan->ecc; struct virt_dma_desc *vdesc; struct edma_desc *edesc; struct device *dev = echan->vchan.chan.device->dev; int i, j, left, nslots; - /* If either we processed all psets or we're still not started */ - if (!echan->edesc || - echan->edesc->pset_nr == echan->edesc->processed) { - /* Get next vdesc */ + if (!echan->edesc) { + /* Setup is needed for the first transfer */ vdesc = vchan_next_desc(&echan->vchan); - if (!vdesc) { - echan->edesc = NULL; + if (!vdesc) return; - } list_del(&vdesc->node); echan->edesc = to_edma_desc(&vdesc->tx); } @@ -177,32 +767,32 @@ static void edma_execute(struct edma_chan *echan) /* Write descriptor PaRAM set(s) */ for (i = 0; i < nslots; i++) { j = i + edesc->processed; - edma_write_slot(echan->slot[i], &edesc->pset[j].param); + edma_write_slot(ecc, echan->slot[i], &edesc->pset[j].param); edesc->sg_len += edesc->pset[j].len; - dev_vdbg(echan->vchan.chan.device->dev, - "\n pset[%d]:\n" - " chnum\t%d\n" - " slot\t%d\n" - " opt\t%08x\n" - " src\t%08x\n" - " dst\t%08x\n" - " abcnt\t%08x\n" - " ccnt\t%08x\n" - " bidx\t%08x\n" - " cidx\t%08x\n" - " lkrld\t%08x\n", - j, echan->ch_num, echan->slot[i], - edesc->pset[j].param.opt, - edesc->pset[j].param.src, - edesc->pset[j].param.dst, - edesc->pset[j].param.a_b_cnt, - edesc->pset[j].param.ccnt, - edesc->pset[j].param.src_dst_bidx, - edesc->pset[j].param.src_dst_cidx, - edesc->pset[j].param.link_bcntrld); + dev_vdbg(dev, + "\n pset[%d]:\n" + " chnum\t%d\n" + " slot\t%d\n" + " opt\t%08x\n" + " src\t%08x\n" + " dst\t%08x\n" + " abcnt\t%08x\n" + " ccnt\t%08x\n" + " bidx\t%08x\n" + " cidx\t%08x\n" + " lkrld\t%08x\n", + j, echan->ch_num, echan->slot[i], + edesc->pset[j].param.opt, + edesc->pset[j].param.src, + edesc->pset[j].param.dst, + edesc->pset[j].param.a_b_cnt, + edesc->pset[j].param.ccnt, + edesc->pset[j].param.src_dst_bidx, + edesc->pset[j].param.src_dst_cidx, + edesc->pset[j].param.link_bcntrld); /* Link to the previous slot if not the last set */ if (i != (nslots - 1)) - edma_link(echan->slot[i], echan->slot[i+1]); + edma_link(ecc, echan->slot[i], echan->slot[i + 1]); } edesc->processed += nslots; @@ -214,34 +804,32 @@ static void edma_execute(struct edma_chan *echan) */ if (edesc->processed == edesc->pset_nr) { if (edesc->cyclic) - edma_link(echan->slot[nslots-1], echan->slot[1]); + edma_link(ecc, echan->slot[nslots - 1], echan->slot[1]); else - edma_link(echan->slot[nslots-1], + edma_link(ecc, echan->slot[nslots - 1], echan->ecc->dummy_slot); } - if (edesc->processed <= MAX_NR_SG) { + if (echan->missed) { + /* + * This happens due to setup times between intermediate + * transfers in long SG lists which have to be broken up into + * transfers of MAX_NR_SG + */ + dev_dbg(dev, "missed event on channel %d\n", echan->ch_num); + edma_clean_channel(echan); + edma_stop(echan); + edma_start(echan); + edma_trigger_channel(echan); + echan->missed = 0; + } else if (edesc->processed <= MAX_NR_SG) { dev_dbg(dev, "first transfer starting on channel %d\n", echan->ch_num); - edma_start(echan->ch_num); + edma_start(echan); } else { dev_dbg(dev, "chan: %d: completed %d elements, resuming\n", echan->ch_num, edesc->processed); - edma_resume(echan->ch_num); - } - - /* - * This happens due to setup times between intermediate transfers - * in long SG lists which have to be broken up into transfers of - * MAX_NR_SG - */ - if (echan->missed) { - dev_dbg(dev, "missed event on channel %d\n", echan->ch_num); - edma_clean_channel(echan->ch_num); - edma_stop(echan->ch_num); - edma_start(echan->ch_num); - edma_trigger_channel(echan->ch_num); - echan->missed = 0; + edma_resume(echan); } } @@ -259,20 +847,16 @@ static int edma_terminate_all(struct dma_chan *chan) * echan->edesc is NULL and exit.) */ if (echan->edesc) { - int cyclic = echan->edesc->cyclic; - + edma_stop(echan); + /* Move the cyclic channel back to default queue */ + if (!echan->tc && echan->edesc->cyclic) + edma_assign_channel_eventq(echan, EVENTQ_DEFAULT); /* * free the running request descriptor * since it is not in any of the vdesc lists */ edma_desc_free(&echan->edesc->vdesc); - echan->edesc = NULL; - edma_stop(echan->ch_num); - /* Move the cyclic channel back to default queue */ - if (cyclic) - edma_assign_channel_eventq(echan->ch_num, - EVENTQ_DEFAULT); } vchan_get_all_descriptors(&echan->vchan, &head); @@ -303,7 +887,7 @@ static int edma_dma_pause(struct dma_chan *chan) if (!echan->edesc) return -EINVAL; - edma_pause(echan->ch_num); + edma_pause(echan); return 0; } @@ -311,7 +895,7 @@ static int edma_dma_resume(struct dma_chan *chan) { struct edma_chan *echan = to_edma_chan(chan); - edma_resume(echan->ch_num); + edma_resume(echan); return 0; } @@ -327,19 +911,17 @@ static int edma_dma_resume(struct dma_chan *chan) * @direction: Direction of the transfer */ static int edma_config_pset(struct dma_chan *chan, struct edma_pset *epset, - dma_addr_t src_addr, dma_addr_t dst_addr, u32 burst, - enum dma_slave_buswidth dev_width, unsigned int dma_length, - enum dma_transfer_direction direction) + dma_addr_t src_addr, dma_addr_t dst_addr, u32 burst, + unsigned int acnt, unsigned int dma_length, + enum dma_transfer_direction direction) { struct edma_chan *echan = to_edma_chan(chan); struct device *dev = chan->device->dev; struct edmacc_param *param = &epset->param; - int acnt, bcnt, ccnt, cidx; + int bcnt, ccnt, cidx; int src_bidx, dst_bidx, src_cidx, dst_cidx; int absync; - acnt = dev_width; - /* src/dst_maxburst == 0 is the same case as src/dst_maxburst == 1 */ if (!burst) burst = 1; @@ -475,8 +1057,8 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( return NULL; } - edesc = kzalloc(sizeof(*edesc) + sg_len * - sizeof(edesc->pset[0]), GFP_ATOMIC); + edesc = kzalloc(sizeof(*edesc) + sg_len * sizeof(edesc->pset[0]), + GFP_ATOMIC); if (!edesc) { dev_err(dev, "%s: Failed to allocate a descriptor\n", __func__); return NULL; @@ -493,8 +1075,7 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( for (i = 0; i < nslots; i++) { if (echan->slot[i] < 0) { echan->slot[i] = - edma_alloc_slot(EDMA_CTLR(echan->ch_num), - EDMA_SLOT_ANY); + edma_alloc_slot(echan->ecc, EDMA_SLOT_ANY); if (echan->slot[i] < 0) { kfree(edesc); dev_err(dev, "%s: Failed to allocate slot\n", @@ -541,36 +1122,98 @@ static struct dma_async_tx_descriptor *edma_prep_dma_memcpy( struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, size_t len, unsigned long tx_flags) { - int ret; + int ret, nslots; struct edma_desc *edesc; struct device *dev = chan->device->dev; struct edma_chan *echan = to_edma_chan(chan); + unsigned int width, pset_len; if (unlikely(!echan || !len)) return NULL; - edesc = kzalloc(sizeof(*edesc) + sizeof(edesc->pset[0]), GFP_ATOMIC); + if (len < SZ_64K) { + /* + * Transfer size less than 64K can be handled with one paRAM + * slot and with one burst. + * ACNT = length + */ + width = len; + pset_len = len; + nslots = 1; + } else { + /* + * Transfer size bigger than 64K will be handled with maximum of + * two paRAM slots. + * slot1: (full_length / 32767) times 32767 bytes bursts. + * ACNT = 32767, length1: (full_length / 32767) * 32767 + * slot2: the remaining amount of data after slot1. + * ACNT = full_length - length1, length2 = ACNT + * + * When the full_length is multibple of 32767 one slot can be + * used to complete the transfer. + */ + width = SZ_32K - 1; + pset_len = rounddown(len, width); + /* One slot is enough for lengths multiple of (SZ_32K -1) */ + if (unlikely(pset_len == len)) + nslots = 1; + else + nslots = 2; + } + + edesc = kzalloc(sizeof(*edesc) + nslots * sizeof(edesc->pset[0]), + GFP_ATOMIC); if (!edesc) { dev_dbg(dev, "Failed to allocate a descriptor\n"); return NULL; } - edesc->pset_nr = 1; + edesc->pset_nr = nslots; + edesc->residue = edesc->residue_stat = len; + edesc->direction = DMA_MEM_TO_MEM; + edesc->echan = echan; ret = edma_config_pset(chan, &edesc->pset[0], src, dest, 1, - DMA_SLAVE_BUSWIDTH_4_BYTES, len, DMA_MEM_TO_MEM); - if (ret < 0) + width, pset_len, DMA_MEM_TO_MEM); + if (ret < 0) { + kfree(edesc); return NULL; + } edesc->absync = ret; - /* - * Enable intermediate transfer chaining to re-trigger channel - * on completion of every TR, and enable transfer-completion - * interrupt on completion of the whole transfer. - */ edesc->pset[0].param.opt |= ITCCHEN; - edesc->pset[0].param.opt |= TCINTEN; + if (nslots == 1) { + /* Enable transfer complete interrupt */ + edesc->pset[0].param.opt |= TCINTEN; + } else { + /* Enable transfer complete chaining for the first slot */ + edesc->pset[0].param.opt |= TCCHEN; + + if (echan->slot[1] < 0) { + echan->slot[1] = edma_alloc_slot(echan->ecc, + EDMA_SLOT_ANY); + if (echan->slot[1] < 0) { + kfree(edesc); + dev_err(dev, "%s: Failed to allocate slot\n", + __func__); + return NULL; + } + } + dest += pset_len; + src += pset_len; + pset_len = width = len % (SZ_32K - 1); + + ret = edma_config_pset(chan, &edesc->pset[1], src, dest, 1, + width, pset_len, DMA_MEM_TO_MEM); + if (ret < 0) { + kfree(edesc); + return NULL; + } + + edesc->pset[1].param.opt |= ITCCHEN; + edesc->pset[1].param.opt |= TCINTEN; + } return vchan_tx_prep(&echan->vchan, &edesc->vdesc, tx_flags); } @@ -629,8 +1272,8 @@ static struct dma_async_tx_descriptor *edma_prep_dma_cyclic( if (nslots > MAX_NR_SG) return NULL; - edesc = kzalloc(sizeof(*edesc) + nslots * - sizeof(edesc->pset[0]), GFP_ATOMIC); + edesc = kzalloc(sizeof(*edesc) + nslots * sizeof(edesc->pset[0]), + GFP_ATOMIC); if (!edesc) { dev_err(dev, "%s: Failed to allocate a descriptor\n", __func__); return NULL; @@ -649,8 +1292,7 @@ static struct dma_async_tx_descriptor *edma_prep_dma_cyclic( /* Allocate a PaRAM slot, if needed */ if (echan->slot[i] < 0) { echan->slot[i] = - edma_alloc_slot(EDMA_CTLR(echan->ch_num), - EDMA_SLOT_ANY); + edma_alloc_slot(echan->ecc, EDMA_SLOT_ANY); if (echan->slot[i] < 0) { kfree(edesc); dev_err(dev, "%s: Failed to allocate slot\n", @@ -711,128 +1353,281 @@ static struct dma_async_tx_descriptor *edma_prep_dma_cyclic( } /* Place the cyclic channel to highest priority queue */ - edma_assign_channel_eventq(echan->ch_num, EVENTQ_0); + if (!echan->tc) + edma_assign_channel_eventq(echan, EVENTQ_0); return vchan_tx_prep(&echan->vchan, &edesc->vdesc, tx_flags); } -static void edma_callback(unsigned ch_num, u16 ch_status, void *data) +static void edma_completion_handler(struct edma_chan *echan) { - struct edma_chan *echan = data; struct device *dev = echan->vchan.chan.device->dev; - struct edma_desc *edesc; - struct edmacc_param p; + struct edma_desc *edesc = echan->edesc; - edesc = echan->edesc; + if (!edesc) + return; - /* Pause the channel for non-cyclic */ - if (!edesc || (edesc && !edesc->cyclic)) - edma_pause(echan->ch_num); - - switch (ch_status) { - case EDMA_DMA_COMPLETE: - spin_lock(&echan->vchan.lock); - - if (edesc) { - if (edesc->cyclic) { - vchan_cyclic_callback(&edesc->vdesc); - } else if (edesc->processed == edesc->pset_nr) { - dev_dbg(dev, "Transfer complete, stopping channel %d\n", ch_num); - edesc->residue = 0; - edma_stop(echan->ch_num); - vchan_cookie_complete(&edesc->vdesc); - edma_execute(echan); - } else { - dev_dbg(dev, "Intermediate transfer complete on channel %d\n", ch_num); - - /* Update statistics for tx_status */ - edesc->residue -= edesc->sg_len; - edesc->residue_stat = edesc->residue; - edesc->processed_stat = edesc->processed; - - edma_execute(echan); - } + spin_lock(&echan->vchan.lock); + if (edesc->cyclic) { + vchan_cyclic_callback(&edesc->vdesc); + spin_unlock(&echan->vchan.lock); + return; + } else if (edesc->processed == edesc->pset_nr) { + edesc->residue = 0; + edma_stop(echan); + vchan_cookie_complete(&edesc->vdesc); + echan->edesc = NULL; + + dev_dbg(dev, "Transfer completed on channel %d\n", + echan->ch_num); + } else { + dev_dbg(dev, "Sub transfer completed on channel %d\n", + echan->ch_num); + + edma_pause(echan); + + /* Update statistics for tx_status */ + edesc->residue -= edesc->sg_len; + edesc->residue_stat = edesc->residue; + edesc->processed_stat = edesc->processed; + } + edma_execute(echan); + + spin_unlock(&echan->vchan.lock); +} + +/* eDMA interrupt handler */ +static irqreturn_t dma_irq_handler(int irq, void *data) +{ + struct edma_cc *ecc = data; + int ctlr; + u32 sh_ier; + u32 sh_ipr; + u32 bank; + + ctlr = ecc->id; + if (ctlr < 0) + return IRQ_NONE; + + dev_vdbg(ecc->dev, "dma_irq_handler\n"); + + sh_ipr = edma_shadow0_read_array(ecc, SH_IPR, 0); + if (!sh_ipr) { + sh_ipr = edma_shadow0_read_array(ecc, SH_IPR, 1); + if (!sh_ipr) + return IRQ_NONE; + sh_ier = edma_shadow0_read_array(ecc, SH_IER, 1); + bank = 1; + } else { + sh_ier = edma_shadow0_read_array(ecc, SH_IER, 0); + bank = 0; + } + + do { + u32 slot; + u32 channel; + + slot = __ffs(sh_ipr); + sh_ipr &= ~(BIT(slot)); + + if (sh_ier & BIT(slot)) { + channel = (bank << 5) | slot; + /* Clear the corresponding IPR bits */ + edma_shadow0_write_array(ecc, SH_ICR, bank, BIT(slot)); + edma_completion_handler(&ecc->slave_chans[channel]); } + } while (sh_ipr); - spin_unlock(&echan->vchan.lock); + edma_shadow0_write(ecc, SH_IEVAL, 1); + return IRQ_HANDLED; +} + +static void edma_error_handler(struct edma_chan *echan) +{ + struct edma_cc *ecc = echan->ecc; + struct device *dev = echan->vchan.chan.device->dev; + struct edmacc_param p; - break; - case EDMA_DMA_CC_ERROR: - spin_lock(&echan->vchan.lock); + if (!echan->edesc) + return; - edma_read_slot(EDMA_CHAN_SLOT(echan->slot[0]), &p); + spin_lock(&echan->vchan.lock); + edma_read_slot(ecc, echan->slot[0], &p); + /* + * Issue later based on missed flag which will be sure + * to happen as: + * (1) we finished transmitting an intermediate slot and + * edma_execute is coming up. + * (2) or we finished current transfer and issue will + * call edma_execute. + * + * Important note: issuing can be dangerous here and + * lead to some nasty recursion when we are in a NULL + * slot. So we avoid doing so and set the missed flag. + */ + if (p.a_b_cnt == 0 && p.ccnt == 0) { + dev_dbg(dev, "Error on null slot, setting miss\n"); + echan->missed = 1; + } else { /* - * Issue later based on missed flag which will be sure - * to happen as: - * (1) we finished transmitting an intermediate slot and - * edma_execute is coming up. - * (2) or we finished current transfer and issue will - * call edma_execute. - * - * Important note: issuing can be dangerous here and - * lead to some nasty recursion when we are in a NULL - * slot. So we avoid doing so and set the missed flag. + * The slot is already programmed but the event got + * missed, so its safe to issue it here. */ - if (p.a_b_cnt == 0 && p.ccnt == 0) { - dev_dbg(dev, "Error occurred, looks like slot is null, just setting miss\n"); - echan->missed = 1; - } else { - /* - * The slot is already programmed but the event got - * missed, so its safe to issue it here. - */ - dev_dbg(dev, "Error occurred but slot is non-null, TRIGGERING\n"); - edma_clean_channel(echan->ch_num); - edma_stop(echan->ch_num); - edma_start(echan->ch_num); - edma_trigger_channel(echan->ch_num); + dev_dbg(dev, "Missed event, TRIGGERING\n"); + edma_clean_channel(echan); + edma_stop(echan); + edma_start(echan); + edma_trigger_channel(echan); + } + spin_unlock(&echan->vchan.lock); +} + +static inline bool edma_error_pending(struct edma_cc *ecc) +{ + if (edma_read_array(ecc, EDMA_EMR, 0) || + edma_read_array(ecc, EDMA_EMR, 1) || + edma_read(ecc, EDMA_QEMR) || edma_read(ecc, EDMA_CCERR)) + return true; + + return false; +} + +/* eDMA error interrupt handler */ +static irqreturn_t dma_ccerr_handler(int irq, void *data) +{ + struct edma_cc *ecc = data; + int i, j; + int ctlr; + unsigned int cnt = 0; + unsigned int val; + + ctlr = ecc->id; + if (ctlr < 0) + return IRQ_NONE; + + dev_vdbg(ecc->dev, "dma_ccerr_handler\n"); + + if (!edma_error_pending(ecc)) + return IRQ_NONE; + + while (1) { + /* Event missed register(s) */ + for (j = 0; j < 2; j++) { + unsigned long emr; + + val = edma_read_array(ecc, EDMA_EMR, j); + if (!val) + continue; + + dev_dbg(ecc->dev, "EMR%d 0x%08x\n", j, val); + emr = val; + for (i = find_next_bit(&emr, 32, 0); i < 32; + i = find_next_bit(&emr, 32, i + 1)) { + int k = (j << 5) + i; + + /* Clear the corresponding EMR bits */ + edma_write_array(ecc, EDMA_EMCR, j, BIT(i)); + /* Clear any SER */ + edma_shadow0_write_array(ecc, SH_SECR, j, + BIT(i)); + edma_error_handler(&ecc->slave_chans[k]); + } } - spin_unlock(&echan->vchan.lock); + val = edma_read(ecc, EDMA_QEMR); + if (val) { + dev_dbg(ecc->dev, "QEMR 0x%02x\n", val); + /* Not reported, just clear the interrupt reason. */ + edma_write(ecc, EDMA_QEMCR, val); + edma_shadow0_write(ecc, SH_QSECR, val); + } + + val = edma_read(ecc, EDMA_CCERR); + if (val) { + dev_warn(ecc->dev, "CCERR 0x%08x\n", val); + /* Not reported, just clear the interrupt reason. */ + edma_write(ecc, EDMA_CCERRCLR, val); + } - break; - default: - break; + if (!edma_error_pending(ecc)) + break; + cnt++; + if (cnt > 10) + break; } + edma_write(ecc, EDMA_EEVAL, 1); + return IRQ_HANDLED; +} + +static void edma_tc_set_pm_state(struct edma_tc *tc, bool enable) +{ + struct platform_device *tc_pdev; + int ret; + + if (!tc) + return; + + tc_pdev = of_find_device_by_node(tc->node); + if (!tc_pdev) { + pr_err("%s: TPTC device is not found\n", __func__); + return; + } + if (!pm_runtime_enabled(&tc_pdev->dev)) + pm_runtime_enable(&tc_pdev->dev); + + if (enable) + ret = pm_runtime_get_sync(&tc_pdev->dev); + else + ret = pm_runtime_put_sync(&tc_pdev->dev); + + if (ret < 0) + pr_err("%s: pm_runtime_%s_sync() failed for %s\n", __func__, + enable ? "get" : "put", dev_name(&tc_pdev->dev)); } /* Alloc channel resources */ static int edma_alloc_chan_resources(struct dma_chan *chan) { struct edma_chan *echan = to_edma_chan(chan); - struct device *dev = chan->device->dev; + struct edma_cc *ecc = echan->ecc; + struct device *dev = ecc->dev; + enum dma_event_q eventq_no = EVENTQ_DEFAULT; int ret; - int a_ch_num; - LIST_HEAD(descs); - a_ch_num = edma_alloc_channel(echan->ch_num, edma_callback, - echan, EVENTQ_DEFAULT); - - if (a_ch_num < 0) { - ret = -ENODEV; - goto err_no_chan; + if (echan->tc) { + eventq_no = echan->tc->id; + } else if (ecc->tc_list) { + /* memcpy channel */ + echan->tc = &ecc->tc_list[ecc->info->default_queue]; + eventq_no = echan->tc->id; } - if (a_ch_num != echan->ch_num) { - dev_err(dev, "failed to allocate requested channel %u:%u\n", - EDMA_CTLR(echan->ch_num), + ret = edma_alloc_channel(echan, eventq_no); + if (ret) + return ret; + + echan->slot[0] = edma_alloc_slot(ecc, echan->ch_num); + if (echan->slot[0] < 0) { + dev_err(dev, "Entry slot allocation failed for channel %u\n", EDMA_CHAN_SLOT(echan->ch_num)); - ret = -ENODEV; - goto err_wrong_chan; + goto err_slot; } + /* Set up channel -> slot mapping for the entry slot */ + edma_set_chmap(echan, echan->slot[0]); echan->alloced = true; - echan->slot[0] = echan->ch_num; - dev_dbg(dev, "allocated channel %d for %u:%u\n", echan->ch_num, - EDMA_CTLR(echan->ch_num), EDMA_CHAN_SLOT(echan->ch_num)); + dev_dbg(dev, "Got eDMA channel %d for virt channel %d (%s trigger)\n", + EDMA_CHAN_SLOT(echan->ch_num), chan->chan_id, + echan->hw_triggered ? "HW" : "SW"); + + edma_tc_set_pm_state(echan->tc, true); return 0; -err_wrong_chan: - edma_free_channel(a_ch_num); -err_no_chan: +err_slot: + edma_free_channel(echan); return ret; } @@ -840,29 +1635,37 @@ err_no_chan: static void edma_free_chan_resources(struct dma_chan *chan) { struct edma_chan *echan = to_edma_chan(chan); - struct device *dev = chan->device->dev; + struct device *dev = echan->ecc->dev; int i; /* Terminate transfers */ - edma_stop(echan->ch_num); + edma_stop(echan); vchan_free_chan_resources(&echan->vchan); /* Free EDMA PaRAM slots */ - for (i = 1; i < EDMA_MAX_SLOTS; i++) { + for (i = 0; i < EDMA_MAX_SLOTS; i++) { if (echan->slot[i] >= 0) { - edma_free_slot(echan->slot[i]); + edma_free_slot(echan->ecc, echan->slot[i]); echan->slot[i] = -1; } } + /* Set entry slot to the dummy slot */ + edma_set_chmap(echan, echan->ecc->dummy_slot); + /* Free EDMA channel */ if (echan->alloced) { - edma_free_channel(echan->ch_num); + edma_free_channel(echan); echan->alloced = false; } - dev_dbg(dev, "freeing channel for %u\n", echan->ch_num); + edma_tc_set_pm_state(echan->tc, false); + echan->tc = NULL; + echan->hw_triggered = false; + + dev_dbg(dev, "Free eDMA channel %d for virt channel %d\n", + EDMA_CHAN_SLOT(echan->ch_num), chan->chan_id); } /* Send pending descriptor to hardware */ @@ -888,7 +1691,7 @@ static u32 edma_residue(struct edma_desc *edesc) * We always read the dst/src position from the first RamPar * pset. That's the one which is active now. */ - pos = edma_get_position(edesc->echan->slot[0], dst); + pos = edma_get_position(edesc->echan->ecc, edesc->echan->slot[0], dst); /* * Cyclic is simple. Just subtract pset[0].addr from pos. @@ -949,19 +1752,101 @@ static enum dma_status edma_tx_status(struct dma_chan *chan, return ret; } -static void __init edma_chan_init(struct edma_cc *ecc, - struct dma_device *dma, - struct edma_chan *echans) +static bool edma_is_memcpy_channel(int ch_num, u16 *memcpy_channels) { + s16 *memcpy_ch = memcpy_channels; + + if (!memcpy_channels) + return false; + while (*memcpy_ch != -1) { + if (*memcpy_ch == ch_num) + return true; + memcpy_ch++; + } + return false; +} + +#define EDMA_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) + +static void edma_dma_init(struct edma_cc *ecc, bool legacy_mode) +{ + struct dma_device *s_ddev = &ecc->dma_slave; + struct dma_device *m_ddev = NULL; + s16 *memcpy_channels = ecc->info->memcpy_channels; int i, j; - for (i = 0; i < EDMA_CHANS; i++) { - struct edma_chan *echan = &echans[i]; - echan->ch_num = EDMA_CTLR_CHAN(ecc->ctlr, i); + dma_cap_zero(s_ddev->cap_mask); + dma_cap_set(DMA_SLAVE, s_ddev->cap_mask); + dma_cap_set(DMA_CYCLIC, s_ddev->cap_mask); + if (ecc->legacy_mode && !memcpy_channels) { + dev_warn(ecc->dev, + "Legacy memcpy is enabled, things might not work\n"); + + dma_cap_set(DMA_MEMCPY, s_ddev->cap_mask); + s_ddev->device_prep_dma_memcpy = edma_prep_dma_memcpy; + s_ddev->directions = BIT(DMA_MEM_TO_MEM); + } + + s_ddev->device_prep_slave_sg = edma_prep_slave_sg; + s_ddev->device_prep_dma_cyclic = edma_prep_dma_cyclic; + s_ddev->device_alloc_chan_resources = edma_alloc_chan_resources; + s_ddev->device_free_chan_resources = edma_free_chan_resources; + s_ddev->device_issue_pending = edma_issue_pending; + s_ddev->device_tx_status = edma_tx_status; + s_ddev->device_config = edma_slave_config; + s_ddev->device_pause = edma_dma_pause; + s_ddev->device_resume = edma_dma_resume; + s_ddev->device_terminate_all = edma_terminate_all; + + s_ddev->src_addr_widths = EDMA_DMA_BUSWIDTHS; + s_ddev->dst_addr_widths = EDMA_DMA_BUSWIDTHS; + s_ddev->directions |= (BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV)); + s_ddev->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; + + s_ddev->dev = ecc->dev; + INIT_LIST_HEAD(&s_ddev->channels); + + if (memcpy_channels) { + m_ddev = devm_kzalloc(ecc->dev, sizeof(*m_ddev), GFP_KERNEL); + ecc->dma_memcpy = m_ddev; + + dma_cap_zero(m_ddev->cap_mask); + dma_cap_set(DMA_MEMCPY, m_ddev->cap_mask); + + m_ddev->device_prep_dma_memcpy = edma_prep_dma_memcpy; + m_ddev->device_alloc_chan_resources = edma_alloc_chan_resources; + m_ddev->device_free_chan_resources = edma_free_chan_resources; + m_ddev->device_issue_pending = edma_issue_pending; + m_ddev->device_tx_status = edma_tx_status; + m_ddev->device_config = edma_slave_config; + m_ddev->device_pause = edma_dma_pause; + m_ddev->device_resume = edma_dma_resume; + m_ddev->device_terminate_all = edma_terminate_all; + + m_ddev->src_addr_widths = EDMA_DMA_BUSWIDTHS; + m_ddev->dst_addr_widths = EDMA_DMA_BUSWIDTHS; + m_ddev->directions = BIT(DMA_MEM_TO_MEM); + m_ddev->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; + + m_ddev->dev = ecc->dev; + INIT_LIST_HEAD(&m_ddev->channels); + } else if (!ecc->legacy_mode) { + dev_info(ecc->dev, "memcpy is disabled\n"); + } + + for (i = 0; i < ecc->num_channels; i++) { + struct edma_chan *echan = &ecc->slave_chans[i]; + echan->ch_num = EDMA_CTLR_CHAN(ecc->id, i); echan->ecc = ecc; echan->vchan.desc_free = edma_desc_free; - vchan_init(&echan->vchan, dma); + if (m_ddev && edma_is_memcpy_channel(i, memcpy_channels)) + vchan_init(&echan->vchan, m_ddev); + else + vchan_init(&echan->vchan, s_ddev); INIT_LIST_HEAD(&echan->node); for (j = 0; j < EDMA_MAX_SLOTS; j++) @@ -969,85 +1854,474 @@ static void __init edma_chan_init(struct edma_cc *ecc, } } -#define EDMA_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ - BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ - BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \ - BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) - -static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma, - struct device *dev) +static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata, + struct edma_cc *ecc) { - dma->device_prep_slave_sg = edma_prep_slave_sg; - dma->device_prep_dma_cyclic = edma_prep_dma_cyclic; - dma->device_prep_dma_memcpy = edma_prep_dma_memcpy; - dma->device_alloc_chan_resources = edma_alloc_chan_resources; - dma->device_free_chan_resources = edma_free_chan_resources; - dma->device_issue_pending = edma_issue_pending; - dma->device_tx_status = edma_tx_status; - dma->device_config = edma_slave_config; - dma->device_pause = edma_dma_pause; - dma->device_resume = edma_dma_resume; - dma->device_terminate_all = edma_terminate_all; + int i; + u32 value, cccfg; + s8 (*queue_priority_map)[2]; + + /* Decode the eDMA3 configuration from CCCFG register */ + cccfg = edma_read(ecc, EDMA_CCCFG); + + value = GET_NUM_REGN(cccfg); + ecc->num_region = BIT(value); + + value = GET_NUM_DMACH(cccfg); + ecc->num_channels = BIT(value + 1); - dma->src_addr_widths = EDMA_DMA_BUSWIDTHS; - dma->dst_addr_widths = EDMA_DMA_BUSWIDTHS; - dma->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); - dma->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; + value = GET_NUM_QDMACH(cccfg); + ecc->num_qchannels = value * 2; - dma->dev = dev; + value = GET_NUM_PAENTRY(cccfg); + ecc->num_slots = BIT(value + 4); + + value = GET_NUM_EVQUE(cccfg); + ecc->num_tc = value + 1; + + ecc->chmap_exist = (cccfg & CHMAP_EXIST) ? true : false; + + dev_dbg(dev, "eDMA3 CC HW configuration (cccfg: 0x%08x):\n", cccfg); + dev_dbg(dev, "num_region: %u\n", ecc->num_region); + dev_dbg(dev, "num_channels: %u\n", ecc->num_channels); + dev_dbg(dev, "num_qchannels: %u\n", ecc->num_qchannels); + dev_dbg(dev, "num_slots: %u\n", ecc->num_slots); + dev_dbg(dev, "num_tc: %u\n", ecc->num_tc); + dev_dbg(dev, "chmap_exist: %s\n", ecc->chmap_exist ? "yes" : "no"); + + /* Nothing need to be done if queue priority is provided */ + if (pdata->queue_priority_mapping) + return 0; /* - * code using dma memcpy must make sure alignment of - * length is at dma->copy_align boundary. + * Configure TC/queue priority as follows: + * Q0 - priority 0 + * Q1 - priority 1 + * Q2 - priority 2 + * ... + * The meaning of priority numbers: 0 highest priority, 7 lowest + * priority. So Q0 is the highest priority queue and the last queue has + * the lowest priority. */ - dma->copy_align = DMAENGINE_ALIGN_4_BYTES; + queue_priority_map = devm_kcalloc(dev, ecc->num_tc + 1, sizeof(s8), + GFP_KERNEL); + if (!queue_priority_map) + return -ENOMEM; + + for (i = 0; i < ecc->num_tc; i++) { + queue_priority_map[i][0] = i; + queue_priority_map[i][1] = i; + } + queue_priority_map[i][0] = -1; + queue_priority_map[i][1] = -1; + + pdata->queue_priority_mapping = queue_priority_map; + /* Default queue has the lowest priority */ + pdata->default_queue = i - 1; + + return 0; +} + +#if IS_ENABLED(CONFIG_OF) +static int edma_xbar_event_map(struct device *dev, struct edma_soc_info *pdata, + size_t sz) +{ + const char pname[] = "ti,edma-xbar-event-map"; + struct resource res; + void __iomem *xbar; + s16 (*xbar_chans)[2]; + size_t nelm = sz / sizeof(s16); + u32 shift, offset, mux; + int ret, i; + + xbar_chans = devm_kcalloc(dev, nelm + 2, sizeof(s16), GFP_KERNEL); + if (!xbar_chans) + return -ENOMEM; + + ret = of_address_to_resource(dev->of_node, 1, &res); + if (ret) + return -ENOMEM; + + xbar = devm_ioremap(dev, res.start, resource_size(&res)); + if (!xbar) + return -ENOMEM; + + ret = of_property_read_u16_array(dev->of_node, pname, (u16 *)xbar_chans, + nelm); + if (ret) + return -EIO; + + /* Invalidate last entry for the other user of this mess */ + nelm >>= 1; + xbar_chans[nelm][0] = -1; + xbar_chans[nelm][1] = -1; + + for (i = 0; i < nelm; i++) { + shift = (xbar_chans[i][1] & 0x03) << 3; + offset = xbar_chans[i][1] & 0xfffffffc; + mux = readl(xbar + offset); + mux &= ~(0xff << shift); + mux |= xbar_chans[i][0] << shift; + writel(mux, (xbar + offset)); + } - INIT_LIST_HEAD(&dma->channels); + pdata->xbar_chans = (const s16 (*)[2]) xbar_chans; + return 0; +} + +static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev, + bool legacy_mode) +{ + struct edma_soc_info *info; + struct property *prop; + size_t sz; + int ret; + + info = devm_kzalloc(dev, sizeof(struct edma_soc_info), GFP_KERNEL); + if (!info) + return ERR_PTR(-ENOMEM); + + if (legacy_mode) { + prop = of_find_property(dev->of_node, "ti,edma-xbar-event-map", + &sz); + if (prop) { + ret = edma_xbar_event_map(dev, info, sz); + if (ret) + return ERR_PTR(ret); + } + return info; + } + + /* Get the list of channels allocated to be used for memcpy */ + prop = of_find_property(dev->of_node, "ti,edma-memcpy-channels", &sz); + if (prop) { + const char pname[] = "ti,edma-memcpy-channels"; + size_t nelm = sz / sizeof(s16); + s16 *memcpy_ch; + + memcpy_ch = devm_kcalloc(dev, nelm + 1, sizeof(s16), + GFP_KERNEL); + if (!memcpy_ch) + return ERR_PTR(-ENOMEM); + + ret = of_property_read_u16_array(dev->of_node, pname, + (u16 *)memcpy_ch, nelm); + if (ret) + return ERR_PTR(ret); + + memcpy_ch[nelm] = -1; + info->memcpy_channels = memcpy_ch; + } + + prop = of_find_property(dev->of_node, "ti,edma-reserved-slot-ranges", + &sz); + if (prop) { + const char pname[] = "ti,edma-reserved-slot-ranges"; + s16 (*rsv_slots)[2]; + size_t nelm = sz / sizeof(*rsv_slots); + struct edma_rsv_info *rsv_info; + + if (!nelm) + return info; + + rsv_info = devm_kzalloc(dev, sizeof(*rsv_info), GFP_KERNEL); + if (!rsv_info) + return ERR_PTR(-ENOMEM); + + rsv_slots = devm_kcalloc(dev, nelm + 1, sizeof(*rsv_slots), + GFP_KERNEL); + if (!rsv_slots) + return ERR_PTR(-ENOMEM); + + ret = of_property_read_u16_array(dev->of_node, pname, + (u16 *)rsv_slots, nelm * 2); + if (ret) + return ERR_PTR(ret); + + rsv_slots[nelm][0] = -1; + rsv_slots[nelm][1] = -1; + info->rsv = rsv_info; + info->rsv->rsv_slots = (const s16 (*)[2])rsv_slots; + } + + return info; +} + +static struct dma_chan *of_edma_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct edma_cc *ecc = ofdma->of_dma_data; + struct dma_chan *chan = NULL; + struct edma_chan *echan; + int i; + + if (!ecc || dma_spec->args_count < 1) + return NULL; + + for (i = 0; i < ecc->num_channels; i++) { + echan = &ecc->slave_chans[i]; + if (echan->ch_num == dma_spec->args[0]) { + chan = &echan->vchan.chan; + break; + } + } + + if (!chan) + return NULL; + + if (echan->ecc->legacy_mode && dma_spec->args_count == 1) + goto out; + + if (!echan->ecc->legacy_mode && dma_spec->args_count == 2 && + dma_spec->args[1] < echan->ecc->num_tc) { + echan->tc = &echan->ecc->tc_list[dma_spec->args[1]]; + goto out; + } + + return NULL; +out: + /* The channel is going to be used as HW synchronized */ + echan->hw_triggered = true; + return dma_get_slave_channel(chan); +} +#else +static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev, + bool legacy_mode) +{ + return ERR_PTR(-EINVAL); +} + +static struct dma_chan *of_edma_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + return NULL; } +#endif static int edma_probe(struct platform_device *pdev) { - struct edma_cc *ecc; + struct edma_soc_info *info = pdev->dev.platform_data; + s8 (*queue_priority_mapping)[2]; + int i, off, ln; + const s16 (*rsv_slots)[2]; + const s16 (*xbar_chans)[2]; + int irq; + char *irq_name; + struct resource *mem; + struct device_node *node = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct edma_cc *ecc; + bool legacy_mode = true; int ret; - ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (node) { + const struct of_device_id *match; + + match = of_match_node(edma_of_ids, node); + if (match && (u32)match->data == EDMA_BINDING_TPCC) + legacy_mode = false; + + info = edma_setup_info_from_dt(dev, legacy_mode); + if (IS_ERR(info)) { + dev_err(dev, "failed to get DT data\n"); + return PTR_ERR(info); + } + } + + if (!info) + return -ENODEV; + + pm_runtime_enable(dev); + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + dev_err(dev, "pm_runtime_get_sync() failed\n"); + return ret; + } + + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); if (ret) return ret; - ecc = devm_kzalloc(&pdev->dev, sizeof(*ecc), GFP_KERNEL); + ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL); if (!ecc) { - dev_err(&pdev->dev, "Can't allocate controller\n"); + dev_err(dev, "Can't allocate controller\n"); return -ENOMEM; } - ecc->ctlr = pdev->id; - ecc->dummy_slot = edma_alloc_slot(ecc->ctlr, EDMA_SLOT_ANY); + ecc->dev = dev; + ecc->id = pdev->id; + ecc->legacy_mode = legacy_mode; + /* When booting with DT the pdev->id is -1 */ + if (ecc->id < 0) + ecc->id = 0; + + mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "edma3_cc"); + if (!mem) { + dev_dbg(dev, "mem resource not found, using index 0\n"); + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + dev_err(dev, "no mem resource?\n"); + return -ENODEV; + } + } + ecc->base = devm_ioremap_resource(dev, mem); + if (IS_ERR(ecc->base)) + return PTR_ERR(ecc->base); + + platform_set_drvdata(pdev, ecc); + + /* Get eDMA3 configuration from IP */ + ret = edma_setup_from_hw(dev, info, ecc); + if (ret) + return ret; + + /* Allocate memory based on the information we got from the IP */ + ecc->slave_chans = devm_kcalloc(dev, ecc->num_channels, + sizeof(*ecc->slave_chans), GFP_KERNEL); + if (!ecc->slave_chans) + return -ENOMEM; + + ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots), + sizeof(unsigned long), GFP_KERNEL); + if (!ecc->slot_inuse) + return -ENOMEM; + + ecc->default_queue = info->default_queue; + + for (i = 0; i < ecc->num_slots; i++) + edma_write_slot(ecc, i, &dummy_paramset); + + if (info->rsv) { + /* Set the reserved slots in inuse list */ + rsv_slots = info->rsv->rsv_slots; + if (rsv_slots) { + for (i = 0; rsv_slots[i][0] != -1; i++) { + off = rsv_slots[i][0]; + ln = rsv_slots[i][1]; + set_bits(off, ln, ecc->slot_inuse); + } + } + } + + /* Clear the xbar mapped channels in unused list */ + xbar_chans = info->xbar_chans; + if (xbar_chans) { + for (i = 0; xbar_chans[i][1] != -1; i++) { + off = xbar_chans[i][1]; + } + } + + irq = platform_get_irq_byname(pdev, "edma3_ccint"); + if (irq < 0 && node) + irq = irq_of_parse_and_map(node, 0); + + if (irq >= 0) { + irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s_ccint", + dev_name(dev)); + ret = devm_request_irq(dev, irq, dma_irq_handler, 0, irq_name, + ecc); + if (ret) { + dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret); + return ret; + } + } + + irq = platform_get_irq_byname(pdev, "edma3_ccerrint"); + if (irq < 0 && node) + irq = irq_of_parse_and_map(node, 2); + + if (irq >= 0) { + irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s_ccerrint", + dev_name(dev)); + ret = devm_request_irq(dev, irq, dma_ccerr_handler, 0, irq_name, + ecc); + if (ret) { + dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret); + return ret; + } + } + + ecc->dummy_slot = edma_alloc_slot(ecc, EDMA_SLOT_ANY); if (ecc->dummy_slot < 0) { - dev_err(&pdev->dev, "Can't allocate PaRAM dummy slot\n"); + dev_err(dev, "Can't allocate PaRAM dummy slot\n"); return ecc->dummy_slot; } - dma_cap_zero(ecc->dma_slave.cap_mask); - dma_cap_set(DMA_SLAVE, ecc->dma_slave.cap_mask); - dma_cap_set(DMA_CYCLIC, ecc->dma_slave.cap_mask); - dma_cap_set(DMA_MEMCPY, ecc->dma_slave.cap_mask); + queue_priority_mapping = info->queue_priority_mapping; + + if (!ecc->legacy_mode) { + int lowest_priority = 0; + struct of_phandle_args tc_args; + + ecc->tc_list = devm_kcalloc(dev, ecc->num_tc, + sizeof(*ecc->tc_list), GFP_KERNEL); + if (!ecc->tc_list) + return -ENOMEM; + + for (i = 0;; i++) { + ret = of_parse_phandle_with_fixed_args(node, "ti,tptcs", + 1, i, &tc_args); + if (ret || i == ecc->num_tc) + break; + + ecc->tc_list[i].node = tc_args.np; + ecc->tc_list[i].id = i; + queue_priority_mapping[i][1] = tc_args.args[0]; + if (queue_priority_mapping[i][1] > lowest_priority) { + lowest_priority = queue_priority_mapping[i][1]; + info->default_queue = i; + } + } + } + + /* Event queue priority mapping */ + for (i = 0; queue_priority_mapping[i][0] != -1; i++) + edma_assign_priority_to_queue(ecc, queue_priority_mapping[i][0], + queue_priority_mapping[i][1]); + + for (i = 0; i < ecc->num_region; i++) { + edma_write_array2(ecc, EDMA_DRAE, i, 0, 0x0); + edma_write_array2(ecc, EDMA_DRAE, i, 1, 0x0); + edma_write_array(ecc, EDMA_QRAE, i, 0x0); + } + ecc->info = info; - edma_dma_init(ecc, &ecc->dma_slave, &pdev->dev); + /* Init the dma device and channels */ + edma_dma_init(ecc, legacy_mode); - edma_chan_init(ecc, &ecc->dma_slave, ecc->slave_chans); + for (i = 0; i < ecc->num_channels; i++) { + /* Assign all channels to the default queue */ + edma_assign_channel_eventq(&ecc->slave_chans[i], + info->default_queue); + /* Set entry slot to the dummy slot */ + edma_set_chmap(&ecc->slave_chans[i], ecc->dummy_slot); + } ret = dma_async_device_register(&ecc->dma_slave); - if (ret) + if (ret) { + dev_err(dev, "slave ddev registration failed (%d)\n", ret); goto err_reg1; + } - platform_set_drvdata(pdev, ecc); + if (ecc->dma_memcpy) { + ret = dma_async_device_register(ecc->dma_memcpy); + if (ret) { + dev_err(dev, "memcpy ddev registration failed (%d)\n", + ret); + dma_async_device_unregister(&ecc->dma_slave); + goto err_reg1; + } + } + + if (node) + of_dma_controller_register(node, of_edma_xlate, ecc); - dev_info(&pdev->dev, "TI EDMA DMA engine driver\n"); + dev_info(dev, "TI EDMA DMA engine driver\n"); return 0; err_reg1: - edma_free_slot(ecc->dummy_slot); + edma_free_slot(ecc, ecc->dummy_slot); return ret; } @@ -1056,33 +2330,112 @@ static int edma_remove(struct platform_device *pdev) struct device *dev = &pdev->dev; struct edma_cc *ecc = dev_get_drvdata(dev); + if (dev->of_node) + of_dma_controller_free(dev->of_node); dma_async_device_unregister(&ecc->dma_slave); - edma_free_slot(ecc->dummy_slot); + if (ecc->dma_memcpy) + dma_async_device_unregister(ecc->dma_memcpy); + edma_free_slot(ecc, ecc->dummy_slot); return 0; } +#ifdef CONFIG_PM_SLEEP +static int edma_pm_suspend(struct device *dev) +{ + struct edma_cc *ecc = dev_get_drvdata(dev); + struct edma_chan *echan = ecc->slave_chans; + int i; + + for (i = 0; i < ecc->num_channels; i++) { + if (echan[i].alloced) { + edma_setup_interrupt(&echan[i], false); + edma_tc_set_pm_state(echan[i].tc, false); + } + } + + return 0; +} + +static int edma_pm_resume(struct device *dev) +{ + struct edma_cc *ecc = dev_get_drvdata(dev); + struct edma_chan *echan = ecc->slave_chans; + int i; + s8 (*queue_priority_mapping)[2]; + + queue_priority_mapping = ecc->info->queue_priority_mapping; + + /* Event queue priority mapping */ + for (i = 0; queue_priority_mapping[i][0] != -1; i++) + edma_assign_priority_to_queue(ecc, queue_priority_mapping[i][0], + queue_priority_mapping[i][1]); + + for (i = 0; i < ecc->num_channels; i++) { + if (echan[i].alloced) { + /* ensure access through shadow region 0 */ + edma_or_array2(ecc, EDMA_DRAE, 0, i >> 5, + BIT(i & 0x1f)); + + edma_setup_interrupt(&echan[i], true); + + /* Set up channel -> slot mapping for the entry slot */ + edma_set_chmap(&echan[i], echan[i].slot[0]); + + edma_tc_set_pm_state(echan[i].tc, true); + } + } + + return 0; +} +#endif + +static const struct dev_pm_ops edma_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(edma_pm_suspend, edma_pm_resume) +}; + static struct platform_driver edma_driver = { .probe = edma_probe, .remove = edma_remove, .driver = { - .name = "edma-dma-engine", + .name = "edma", + .pm = &edma_pm_ops, + .of_match_table = edma_of_ids, + }, +}; + +static struct platform_driver edma_tptc_driver = { + .driver = { + .name = "edma3-tptc", + .of_match_table = edma_tptc_of_ids, }, }; bool edma_filter_fn(struct dma_chan *chan, void *param) { + bool match = false; + if (chan->device->dev->driver == &edma_driver.driver) { struct edma_chan *echan = to_edma_chan(chan); unsigned ch_req = *(unsigned *)param; - return ch_req == echan->ch_num; + if (ch_req == echan->ch_num) { + /* The channel is going to be used as HW synchronized */ + echan->hw_triggered = true; + match = true; + } } - return false; + return match; } EXPORT_SYMBOL(edma_filter_fn); static int edma_init(void) { + int ret; + + ret = platform_driver_register(&edma_tptc_driver); + if (ret) + return ret; + return platform_driver_register(&edma_driver); } subsys_initcall(edma_init); @@ -1090,6 +2443,7 @@ subsys_initcall(edma_init); static void __exit edma_exit(void) { platform_driver_unregister(&edma_driver); + platform_driver_unregister(&edma_tptc_driver); } module_exit(edma_exit); diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index 300f821..2209f75 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -1512,6 +1512,7 @@ static const struct of_device_id fsldma_of_ids[] = { { .compatible = "fsl,elo-dma", }, {} }; +MODULE_DEVICE_TABLE(of, fsldma_of_ids); static struct platform_driver fsldma_of_driver = { .driver = { diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c index 48d6d9e..7d56b47 100644 --- a/drivers/dma/idma64.c +++ b/drivers/dma/idma64.c @@ -65,9 +65,6 @@ static void idma64_chan_init(struct idma64 *idma64, struct idma64_chan *idma64c) u32 cfghi = IDMA64C_CFGH_SRC_PER(1) | IDMA64C_CFGH_DST_PER(0); u32 cfglo = 0; - /* Enforce FIFO drain when channel is suspended */ - cfglo |= IDMA64C_CFGL_CH_DRAIN; - /* Set default burst alignment */ cfglo |= IDMA64C_CFGL_DST_BURST_ALIGN | IDMA64C_CFGL_SRC_BURST_ALIGN; @@ -257,15 +254,15 @@ static u64 idma64_hw_desc_fill(struct idma64_hw_desc *hw, dar = config->dst_addr; ctllo |= IDMA64C_CTLL_DST_FIX | IDMA64C_CTLL_SRC_INC | IDMA64C_CTLL_FC_M2P; - src_width = min_t(u32, 2, __fls(sar | hw->len)); - dst_width = __fls(config->dst_addr_width); + src_width = __ffs(sar | hw->len | 4); + dst_width = __ffs(config->dst_addr_width); } else { /* DMA_DEV_TO_MEM */ sar = config->src_addr; dar = hw->phys; ctllo |= IDMA64C_CTLL_DST_INC | IDMA64C_CTLL_SRC_FIX | IDMA64C_CTLL_FC_P2M; - src_width = __fls(config->src_addr_width); - dst_width = min_t(u32, 2, __fls(dar | hw->len)); + src_width = __ffs(config->src_addr_width); + dst_width = __ffs(dar | hw->len | 4); } lli->sar = sar; @@ -428,12 +425,17 @@ static int idma64_slave_config(struct dma_chan *chan, return 0; } -static void idma64_chan_deactivate(struct idma64_chan *idma64c) +static void idma64_chan_deactivate(struct idma64_chan *idma64c, bool drain) { unsigned short count = 100; u32 cfglo; cfglo = channel_readl(idma64c, CFG_LO); + if (drain) + cfglo |= IDMA64C_CFGL_CH_DRAIN; + else + cfglo &= ~IDMA64C_CFGL_CH_DRAIN; + channel_writel(idma64c, CFG_LO, cfglo | IDMA64C_CFGL_CH_SUSP); do { udelay(1); @@ -456,7 +458,7 @@ static int idma64_pause(struct dma_chan *chan) spin_lock_irqsave(&idma64c->vchan.lock, flags); if (idma64c->desc && idma64c->desc->status == DMA_IN_PROGRESS) { - idma64_chan_deactivate(idma64c); + idma64_chan_deactivate(idma64c, false); idma64c->desc->status = DMA_PAUSED; } spin_unlock_irqrestore(&idma64c->vchan.lock, flags); @@ -486,7 +488,7 @@ static int idma64_terminate_all(struct dma_chan *chan) LIST_HEAD(head); spin_lock_irqsave(&idma64c->vchan.lock, flags); - idma64_chan_deactivate(idma64c); + idma64_chan_deactivate(idma64c, true); idma64_stop_transfer(idma64c); if (idma64c->desc) { idma64_vdesc_free(&idma64c->desc->vdesc); diff --git a/drivers/dma/idma64.h b/drivers/dma/idma64.h index a4d9968..f6aeff0 100644 --- a/drivers/dma/idma64.h +++ b/drivers/dma/idma64.h @@ -16,6 +16,8 @@ #include <linux/spinlock.h> #include <linux/types.h> +#include <asm-generic/io-64-nonatomic-lo-hi.h> + #include "virt-dma.h" /* Channel registers */ @@ -166,19 +168,13 @@ static inline void idma64c_writel(struct idma64_chan *idma64c, int offset, static inline u64 idma64c_readq(struct idma64_chan *idma64c, int offset) { - u64 l, h; - - l = idma64c_readl(idma64c, offset); - h = idma64c_readl(idma64c, offset + 4); - - return l | (h << 32); + return lo_hi_readq(idma64c->regs + offset); } static inline void idma64c_writeq(struct idma64_chan *idma64c, int offset, u64 value) { - idma64c_writel(idma64c, offset, value); - idma64c_writel(idma64c, offset + 4, value >> 32); + lo_hi_writeq(value, idma64c->regs + offset); } #define channel_readq(idma64c, reg) \ @@ -217,7 +213,7 @@ static inline void idma64_writel(struct idma64 *idma64, int offset, u32 value) idma64_writel(idma64, IDMA64_##reg, (value)) /** - * struct idma64_chip - representation of DesignWare DMA controller hardware + * struct idma64_chip - representation of iDMA 64-bit controller hardware * @dev: struct device of the DMA controller * @irq: irq line * @regs: memory mapped I/O space diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 9d375bc..7058d58 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1478,7 +1478,7 @@ static int __init sdma_event_remap(struct sdma_engine *sdma) event_remap = of_find_property(np, propname, NULL); num_map = event_remap ? (event_remap->length / sizeof(u32)) : 0; if (!num_map) { - dev_warn(sdma->dev, "no event needs to be remapped\n"); + dev_dbg(sdma->dev, "no event needs to be remapped\n"); goto out; } else if (num_map % EVENT_REMAP_CELLS) { dev_err(sdma->dev, "the property %s must modulo %d\n", @@ -1826,8 +1826,6 @@ static int sdma_probe(struct platform_device *pdev) of_node_put(spba_bus); } - dev_info(sdma->dev, "initialized\n"); - return 0; err_register: @@ -1852,7 +1850,6 @@ static int sdma_remove(struct platform_device *pdev) } platform_set_drvdata(pdev, NULL); - dev_info(&pdev->dev, "Removed...\n"); return 0; } diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index f66b7e6..1d5df2e 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -197,7 +197,8 @@ static void __ioat_start_null_desc(struct ioatdma_chan *ioat_chan) void ioat_start_null_desc(struct ioatdma_chan *ioat_chan) { spin_lock_bh(&ioat_chan->prep_lock); - __ioat_start_null_desc(ioat_chan); + if (!test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + __ioat_start_null_desc(ioat_chan); spin_unlock_bh(&ioat_chan->prep_lock); } diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h index 1bc08498..8f4e607 100644 --- a/drivers/dma/ioat/dma.h +++ b/drivers/dma/ioat/dma.h @@ -82,8 +82,9 @@ struct ioatdma_device { struct dma_pool *sed_hw_pool[MAX_SED_POOLS]; struct dma_device dma_dev; u8 version; - struct msix_entry msix_entries[4]; - struct ioatdma_chan *idx[4]; +#define IOAT_MAX_CHANS 4 + struct msix_entry msix_entries[IOAT_MAX_CHANS]; + struct ioatdma_chan *idx[IOAT_MAX_CHANS]; struct dca_provider *dca; enum ioat_irq_mode irq_mode; u32 cap; @@ -95,6 +96,7 @@ struct ioatdma_chan { dma_addr_t last_completion; spinlock_t cleanup_lock; unsigned long state; + #define IOAT_CHAN_DOWN 0 #define IOAT_COMPLETION_ACK 1 #define IOAT_RESET_PENDING 2 #define IOAT_KOBJ_INIT_FAIL 3 diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 1c3c9b0..4ef0c5e 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -27,6 +27,7 @@ #include <linux/workqueue.h> #include <linux/prefetch.h> #include <linux/dca.h> +#include <linux/aer.h> #include "dma.h" #include "registers.h" #include "hw.h" @@ -1186,13 +1187,116 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca) return 0; } +static void ioat_shutdown(struct pci_dev *pdev) +{ + struct ioatdma_device *ioat_dma = pci_get_drvdata(pdev); + struct ioatdma_chan *ioat_chan; + int i; + + if (!ioat_dma) + return; + + for (i = 0; i < IOAT_MAX_CHANS; i++) { + ioat_chan = ioat_dma->idx[i]; + if (!ioat_chan) + continue; + + spin_lock_bh(&ioat_chan->prep_lock); + set_bit(IOAT_CHAN_DOWN, &ioat_chan->state); + del_timer_sync(&ioat_chan->timer); + spin_unlock_bh(&ioat_chan->prep_lock); + /* this should quiesce then reset */ + ioat_reset_hw(ioat_chan); + } + + ioat_disable_interrupts(ioat_dma); +} + +void ioat_resume(struct ioatdma_device *ioat_dma) +{ + struct ioatdma_chan *ioat_chan; + u32 chanerr; + int i; + + for (i = 0; i < IOAT_MAX_CHANS; i++) { + ioat_chan = ioat_dma->idx[i]; + if (!ioat_chan) + continue; + + spin_lock_bh(&ioat_chan->prep_lock); + clear_bit(IOAT_CHAN_DOWN, &ioat_chan->state); + spin_unlock_bh(&ioat_chan->prep_lock); + + chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET); + writel(chanerr, ioat_chan->reg_base + IOAT_CHANERR_OFFSET); + + /* no need to reset as shutdown already did that */ + } +} + #define DRV_NAME "ioatdma" +static pci_ers_result_t ioat_pcie_error_detected(struct pci_dev *pdev, + enum pci_channel_state error) +{ + dev_dbg(&pdev->dev, "%s: PCIe AER error %d\n", DRV_NAME, error); + + /* quiesce and block I/O */ + ioat_shutdown(pdev); + + return PCI_ERS_RESULT_NEED_RESET; +} + +static pci_ers_result_t ioat_pcie_error_slot_reset(struct pci_dev *pdev) +{ + pci_ers_result_t result = PCI_ERS_RESULT_RECOVERED; + int err; + + dev_dbg(&pdev->dev, "%s post reset handling\n", DRV_NAME); + + if (pci_enable_device_mem(pdev) < 0) { + dev_err(&pdev->dev, + "Failed to enable PCIe device after reset.\n"); + result = PCI_ERS_RESULT_DISCONNECT; + } else { + pci_set_master(pdev); + pci_restore_state(pdev); + pci_save_state(pdev); + pci_wake_from_d3(pdev, false); + } + + err = pci_cleanup_aer_uncorrect_error_status(pdev); + if (err) { + dev_err(&pdev->dev, + "AER uncorrect error status clear failed: %#x\n", err); + } + + return result; +} + +static void ioat_pcie_error_resume(struct pci_dev *pdev) +{ + struct ioatdma_device *ioat_dma = pci_get_drvdata(pdev); + + dev_dbg(&pdev->dev, "%s: AER handling resuming\n", DRV_NAME); + + /* initialize and bring everything back */ + ioat_resume(ioat_dma); +} + +static const struct pci_error_handlers ioat_err_handler = { + .error_detected = ioat_pcie_error_detected, + .slot_reset = ioat_pcie_error_slot_reset, + .resume = ioat_pcie_error_resume, +}; + static struct pci_driver ioat_pci_driver = { .name = DRV_NAME, .id_table = ioat_pci_tbl, .probe = ioat_pci_probe, .remove = ioat_remove, + .shutdown = ioat_shutdown, + .err_handler = &ioat_err_handler, }; static struct ioatdma_device * @@ -1245,13 +1349,17 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) pci_set_drvdata(pdev, device); device->version = readb(device->reg_base + IOAT_VER_OFFSET); - if (device->version >= IOAT_VER_3_0) + if (device->version >= IOAT_VER_3_0) { err = ioat3_dma_probe(device, ioat_dca_enabled); - else + + if (device->version >= IOAT_VER_3_3) + pci_enable_pcie_error_reporting(pdev); + } else return -ENODEV; if (err) { dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); + pci_disable_pcie_error_reporting(pdev); return -ENODEV; } @@ -1271,6 +1379,8 @@ static void ioat_remove(struct pci_dev *pdev) free_dca_provider(device->dca); device->dca = NULL; } + + pci_disable_pcie_error_reporting(pdev); ioat_dma_remove(device); } diff --git a/drivers/dma/ioat/prep.c b/drivers/dma/ioat/prep.c index ad4fb41..6bb4a13 100644 --- a/drivers/dma/ioat/prep.c +++ b/drivers/dma/ioat/prep.c @@ -121,6 +121,9 @@ ioat_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest, size_t total_len = len; int num_descs, idx, i; + if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + return NULL; + num_descs = ioat_xferlen_to_descs(ioat_chan, len); if (likely(num_descs) && ioat_check_space_lock(ioat_chan, num_descs) == 0) @@ -254,6 +257,11 @@ struct dma_async_tx_descriptor * ioat_prep_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src, unsigned int src_cnt, size_t len, unsigned long flags) { + struct ioatdma_chan *ioat_chan = to_ioat_chan(chan); + + if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + return NULL; + return __ioat_prep_xor_lock(chan, NULL, dest, src, src_cnt, len, flags); } @@ -262,6 +270,11 @@ ioat_prep_xor_val(struct dma_chan *chan, dma_addr_t *src, unsigned int src_cnt, size_t len, enum sum_check_flags *result, unsigned long flags) { + struct ioatdma_chan *ioat_chan = to_ioat_chan(chan); + + if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + return NULL; + /* the cleanup routine only sets bits on validate failure, it * does not clear bits on validate success... so clear it here */ @@ -574,6 +587,11 @@ ioat_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src, unsigned int src_cnt, const unsigned char *scf, size_t len, unsigned long flags) { + struct ioatdma_chan *ioat_chan = to_ioat_chan(chan); + + if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + return NULL; + /* specify valid address for disabled result */ if (flags & DMA_PREP_PQ_DISABLE_P) dst[0] = dst[1]; @@ -614,6 +632,11 @@ ioat_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src, unsigned int src_cnt, const unsigned char *scf, size_t len, enum sum_check_flags *pqres, unsigned long flags) { + struct ioatdma_chan *ioat_chan = to_ioat_chan(chan); + + if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + return NULL; + /* specify valid address for disabled result */ if (flags & DMA_PREP_PQ_DISABLE_P) pq[0] = pq[1]; @@ -638,6 +661,10 @@ ioat_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src, { unsigned char scf[MAX_SCF]; dma_addr_t pq[2]; + struct ioatdma_chan *ioat_chan = to_ioat_chan(chan); + + if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + return NULL; if (src_cnt > MAX_SCF) return NULL; @@ -661,6 +688,10 @@ ioat_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src, { unsigned char scf[MAX_SCF]; dma_addr_t pq[2]; + struct ioatdma_chan *ioat_chan = to_ioat_chan(chan); + + if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + return NULL; if (src_cnt > MAX_SCF) return NULL; @@ -689,6 +720,9 @@ ioat_prep_interrupt_lock(struct dma_chan *c, unsigned long flags) struct ioat_ring_ent *desc; struct ioat_dma_descriptor *hw; + if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) + return NULL; + if (ioat_check_space_lock(ioat_chan, 1) == 0) desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head); else diff --git a/drivers/dma/moxart-dma.c b/drivers/dma/moxart-dma.c index b463410..631c443 100644 --- a/drivers/dma/moxart-dma.c +++ b/drivers/dma/moxart-dma.c @@ -652,6 +652,7 @@ static const struct of_device_id moxart_dma_match[] = { { .compatible = "moxa,moxart-dma" }, { } }; +MODULE_DEVICE_TABLE(of, moxart_dma_match); static struct platform_driver moxart_driver = { .probe = moxart_probe, diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c index e6281e7..aae76fb 100644 --- a/drivers/dma/mpc512x_dma.c +++ b/drivers/dma/mpc512x_dma.c @@ -1073,6 +1073,7 @@ static const struct of_device_id mpc_dma_match[] = { { .compatible = "fsl,mpc8308-dma", }, {}, }; +MODULE_DEVICE_TABLE(of, mpc_dma_match); static struct platform_driver mpc_dma_driver = { .probe = mpc_dma_probe, diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 249445c..1dfc71c 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -935,8 +935,12 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( else d->ccr |= CCR_SYNC_ELEMENT; - if (dir == DMA_DEV_TO_MEM) + if (dir == DMA_DEV_TO_MEM) { d->ccr |= CCR_TRIGGER_SRC; + d->csdp |= CSDP_DST_PACKED; + } else { + d->csdp |= CSDP_SRC_PACKED; + } d->cicr |= CICR_MISALIGNED_ERR_IE | CICR_TRANS_ERR_IE; diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c index 7d5598d..22ea241 100644 --- a/drivers/dma/sirf-dma.c +++ b/drivers/dma/sirf-dma.c @@ -1149,6 +1149,7 @@ static const struct of_device_id sirfsoc_dma_match[] = { { .compatible = "sirf,atlas7-dmac-v2", .data = &sirfsoc_dmadata_a7v2,}, {}, }; +MODULE_DEVICE_TABLE(of, sirfsoc_dma_match); static struct platform_driver sirfsoc_dma_driver = { .probe = sirfsoc_dma_probe, diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 750d1b3..dd3e7ba 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -2907,7 +2907,7 @@ static int __init d40_dmaengine_init(struct d40_base *base, if (err) { d40_err(base->dev, - "Failed to regsiter memcpy only channels\n"); + "Failed to register memcpy only channels\n"); goto failure2; } diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c index 73e0be6..2db12e4 100644 --- a/drivers/dma/sun6i-dma.c +++ b/drivers/dma/sun6i-dma.c @@ -908,6 +908,7 @@ static const struct of_device_id sun6i_dma_match[] = { { .compatible = "allwinner,sun8i-h3-dma", .data = &sun8i_h3_dma_cfg }, { /* sentinel */ } }; +MODULE_DEVICE_TABLE(of, sun6i_dma_match); static int sun6i_dma_probe(struct platform_device *pdev) { diff --git a/drivers/dma/ti-dma-crossbar.c b/drivers/dma/ti-dma-crossbar.c index 5cce8c9..a415edb 100644 --- a/drivers/dma/ti-dma-crossbar.c +++ b/drivers/dma/ti-dma-crossbar.c @@ -17,13 +17,184 @@ #include <linux/of_device.h> #include <linux/of_dma.h> -#define TI_XBAR_OUTPUTS 127 -#define TI_XBAR_INPUTS 256 +#define TI_XBAR_DRA7 0 +#define TI_XBAR_AM335X 1 + +static const struct of_device_id ti_dma_xbar_match[] = { + { + .compatible = "ti,dra7-dma-crossbar", + .data = (void *)TI_XBAR_DRA7, + }, + { + .compatible = "ti,am335x-edma-crossbar", + .data = (void *)TI_XBAR_AM335X, + }, + {}, +}; + +/* Crossbar on AM335x/AM437x family */ +#define TI_AM335X_XBAR_LINES 64 + +struct ti_am335x_xbar_data { + void __iomem *iomem; + + struct dma_router dmarouter; + + u32 xbar_events; /* maximum number of events to select in xbar */ + u32 dma_requests; /* number of DMA requests on eDMA */ +}; + +struct ti_am335x_xbar_map { + u16 dma_line; + u16 mux_val; +}; + +static inline void ti_am335x_xbar_write(void __iomem *iomem, int event, u16 val) +{ + writeb_relaxed(val & 0x1f, iomem + event); +} + +static void ti_am335x_xbar_free(struct device *dev, void *route_data) +{ + struct ti_am335x_xbar_data *xbar = dev_get_drvdata(dev); + struct ti_am335x_xbar_map *map = route_data; + + dev_dbg(dev, "Unmapping XBAR event %u on channel %u\n", + map->mux_val, map->dma_line); + + ti_am335x_xbar_write(xbar->iomem, map->dma_line, 0); + kfree(map); +} + +static void *ti_am335x_xbar_route_allocate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct platform_device *pdev = of_find_device_by_node(ofdma->of_node); + struct ti_am335x_xbar_data *xbar = platform_get_drvdata(pdev); + struct ti_am335x_xbar_map *map; + + if (dma_spec->args_count != 3) + return ERR_PTR(-EINVAL); + + if (dma_spec->args[2] >= xbar->xbar_events) { + dev_err(&pdev->dev, "Invalid XBAR event number: %d\n", + dma_spec->args[2]); + return ERR_PTR(-EINVAL); + } + + if (dma_spec->args[0] >= xbar->dma_requests) { + dev_err(&pdev->dev, "Invalid DMA request line number: %d\n", + dma_spec->args[0]); + return ERR_PTR(-EINVAL); + } + + /* The of_node_put() will be done in the core for the node */ + dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0); + if (!dma_spec->np) { + dev_err(&pdev->dev, "Can't get DMA master\n"); + return ERR_PTR(-EINVAL); + } + + map = kzalloc(sizeof(*map), GFP_KERNEL); + if (!map) { + of_node_put(dma_spec->np); + return ERR_PTR(-ENOMEM); + } + + map->dma_line = (u16)dma_spec->args[0]; + map->mux_val = (u16)dma_spec->args[2]; + + dma_spec->args[2] = 0; + dma_spec->args_count = 2; + + dev_dbg(&pdev->dev, "Mapping XBAR event%u to DMA%u\n", + map->mux_val, map->dma_line); + + ti_am335x_xbar_write(xbar->iomem, map->dma_line, map->mux_val); + + return map; +} + +static const struct of_device_id ti_am335x_master_match[] = { + { .compatible = "ti,edma3-tpcc", }, + {}, +}; + +static int ti_am335x_xbar_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + const struct of_device_id *match; + struct device_node *dma_node; + struct ti_am335x_xbar_data *xbar; + struct resource *res; + void __iomem *iomem; + int i, ret; + + if (!node) + return -ENODEV; + + xbar = devm_kzalloc(&pdev->dev, sizeof(*xbar), GFP_KERNEL); + if (!xbar) + return -ENOMEM; + + dma_node = of_parse_phandle(node, "dma-masters", 0); + if (!dma_node) { + dev_err(&pdev->dev, "Can't get DMA master node\n"); + return -ENODEV; + } + + match = of_match_node(ti_am335x_master_match, dma_node); + if (!match) { + dev_err(&pdev->dev, "DMA master is not supported\n"); + return -EINVAL; + } + + if (of_property_read_u32(dma_node, "dma-requests", + &xbar->dma_requests)) { + dev_info(&pdev->dev, + "Missing XBAR output information, using %u.\n", + TI_AM335X_XBAR_LINES); + xbar->dma_requests = TI_AM335X_XBAR_LINES; + } + of_node_put(dma_node); + + if (of_property_read_u32(node, "dma-requests", &xbar->xbar_events)) { + dev_info(&pdev->dev, + "Missing XBAR input information, using %u.\n", + TI_AM335X_XBAR_LINES); + xbar->xbar_events = TI_AM335X_XBAR_LINES; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + iomem = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(iomem)) + return PTR_ERR(iomem); + + xbar->iomem = iomem; + + xbar->dmarouter.dev = &pdev->dev; + xbar->dmarouter.route_free = ti_am335x_xbar_free; + + platform_set_drvdata(pdev, xbar); + + /* Reset the crossbar */ + for (i = 0; i < xbar->dma_requests; i++) + ti_am335x_xbar_write(xbar->iomem, i, 0); + + ret = of_dma_router_register(node, ti_am335x_xbar_route_allocate, + &xbar->dmarouter); + + return ret; +} + +/* Crossbar on DRA7xx family */ +#define TI_DRA7_XBAR_OUTPUTS 127 +#define TI_DRA7_XBAR_INPUTS 256 #define TI_XBAR_EDMA_OFFSET 0 #define TI_XBAR_SDMA_OFFSET 1 -struct ti_dma_xbar_data { +struct ti_dra7_xbar_data { void __iomem *iomem; struct dma_router dmarouter; @@ -35,35 +206,35 @@ struct ti_dma_xbar_data { u32 dma_offset; }; -struct ti_dma_xbar_map { +struct ti_dra7_xbar_map { u16 xbar_in; int xbar_out; }; -static inline void ti_dma_xbar_write(void __iomem *iomem, int xbar, u16 val) +static inline void ti_dra7_xbar_write(void __iomem *iomem, int xbar, u16 val) { writew_relaxed(val, iomem + (xbar * 2)); } -static void ti_dma_xbar_free(struct device *dev, void *route_data) +static void ti_dra7_xbar_free(struct device *dev, void *route_data) { - struct ti_dma_xbar_data *xbar = dev_get_drvdata(dev); - struct ti_dma_xbar_map *map = route_data; + struct ti_dra7_xbar_data *xbar = dev_get_drvdata(dev); + struct ti_dra7_xbar_map *map = route_data; dev_dbg(dev, "Unmapping XBAR%u (was routed to %d)\n", map->xbar_in, map->xbar_out); - ti_dma_xbar_write(xbar->iomem, map->xbar_out, xbar->safe_val); + ti_dra7_xbar_write(xbar->iomem, map->xbar_out, xbar->safe_val); idr_remove(&xbar->map_idr, map->xbar_out); kfree(map); } -static void *ti_dma_xbar_route_allocate(struct of_phandle_args *dma_spec, - struct of_dma *ofdma) +static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) { struct platform_device *pdev = of_find_device_by_node(ofdma->of_node); - struct ti_dma_xbar_data *xbar = platform_get_drvdata(pdev); - struct ti_dma_xbar_map *map; + struct ti_dra7_xbar_data *xbar = platform_get_drvdata(pdev); + struct ti_dra7_xbar_map *map; if (dma_spec->args[0] >= xbar->xbar_requests) { dev_err(&pdev->dev, "Invalid XBAR request number: %d\n", @@ -93,12 +264,12 @@ static void *ti_dma_xbar_route_allocate(struct of_phandle_args *dma_spec, dev_dbg(&pdev->dev, "Mapping XBAR%u to DMA%d\n", map->xbar_in, map->xbar_out); - ti_dma_xbar_write(xbar->iomem, map->xbar_out, map->xbar_in); + ti_dra7_xbar_write(xbar->iomem, map->xbar_out, map->xbar_in); return map; } -static const struct of_device_id ti_dma_master_match[] = { +static const struct of_device_id ti_dra7_master_match[] = { { .compatible = "ti,omap4430-sdma", .data = (void *)TI_XBAR_SDMA_OFFSET, @@ -110,12 +281,12 @@ static const struct of_device_id ti_dma_master_match[] = { {}, }; -static int ti_dma_xbar_probe(struct platform_device *pdev) +static int ti_dra7_xbar_probe(struct platform_device *pdev) { struct device_node *node = pdev->dev.of_node; const struct of_device_id *match; struct device_node *dma_node; - struct ti_dma_xbar_data *xbar; + struct ti_dra7_xbar_data *xbar; struct resource *res; u32 safe_val; void __iomem *iomem; @@ -136,7 +307,7 @@ static int ti_dma_xbar_probe(struct platform_device *pdev) return -ENODEV; } - match = of_match_node(ti_dma_master_match, dma_node); + match = of_match_node(ti_dra7_master_match, dma_node); if (!match) { dev_err(&pdev->dev, "DMA master is not supported\n"); return -EINVAL; @@ -146,16 +317,16 @@ static int ti_dma_xbar_probe(struct platform_device *pdev) &xbar->dma_requests)) { dev_info(&pdev->dev, "Missing XBAR output information, using %u.\n", - TI_XBAR_OUTPUTS); - xbar->dma_requests = TI_XBAR_OUTPUTS; + TI_DRA7_XBAR_OUTPUTS); + xbar->dma_requests = TI_DRA7_XBAR_OUTPUTS; } of_node_put(dma_node); if (of_property_read_u32(node, "dma-requests", &xbar->xbar_requests)) { dev_info(&pdev->dev, "Missing XBAR input information, using %u.\n", - TI_XBAR_INPUTS); - xbar->xbar_requests = TI_XBAR_INPUTS; + TI_DRA7_XBAR_INPUTS); + xbar->xbar_requests = TI_DRA7_XBAR_INPUTS; } if (!of_property_read_u32(node, "ti,dma-safe-map", &safe_val)) @@ -169,30 +340,50 @@ static int ti_dma_xbar_probe(struct platform_device *pdev) xbar->iomem = iomem; xbar->dmarouter.dev = &pdev->dev; - xbar->dmarouter.route_free = ti_dma_xbar_free; + xbar->dmarouter.route_free = ti_dra7_xbar_free; xbar->dma_offset = (u32)match->data; platform_set_drvdata(pdev, xbar); /* Reset the crossbar */ for (i = 0; i < xbar->dma_requests; i++) - ti_dma_xbar_write(xbar->iomem, i, xbar->safe_val); + ti_dra7_xbar_write(xbar->iomem, i, xbar->safe_val); - ret = of_dma_router_register(node, ti_dma_xbar_route_allocate, + ret = of_dma_router_register(node, ti_dra7_xbar_route_allocate, &xbar->dmarouter); if (ret) { /* Restore the defaults for the crossbar */ for (i = 0; i < xbar->dma_requests; i++) - ti_dma_xbar_write(xbar->iomem, i, i); + ti_dra7_xbar_write(xbar->iomem, i, i); } return ret; } -static const struct of_device_id ti_dma_xbar_match[] = { - { .compatible = "ti,dra7-dma-crossbar" }, - {}, -}; +static int ti_dma_xbar_probe(struct platform_device *pdev) +{ + const struct of_device_id *match; + int ret; + + match = of_match_node(ti_dma_xbar_match, pdev->dev.of_node); + if (unlikely(!match)) + return -EINVAL; + + switch ((u32)match->data) { + case TI_XBAR_DRA7: + ret = ti_dra7_xbar_probe(pdev); + break; + case TI_XBAR_AM335X: + ret = ti_am335x_xbar_probe(pdev); + break; + default: + dev_err(&pdev->dev, "Unsupported crossbar\n"); + ret = -ENODEV; + break; + } + + return ret; +} static struct platform_driver ti_dma_xbar_driver = { .driver = { diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h index 181b952..2fa4774 100644 --- a/drivers/dma/virt-dma.h +++ b/drivers/dma/virt-dma.h @@ -47,9 +47,9 @@ struct virt_dma_desc *vchan_find_desc(struct virt_dma_chan *, dma_cookie_t); /** * vchan_tx_prep - prepare a descriptor - * vc: virtual channel allocating this descriptor - * vd: virtual descriptor to prepare - * tx_flags: flags argument passed in to prepare function + * @vc: virtual channel allocating this descriptor + * @vd: virtual descriptor to prepare + * @tx_flags: flags argument passed in to prepare function */ static inline struct dma_async_tx_descriptor *vchan_tx_prep(struct virt_dma_chan *vc, struct virt_dma_desc *vd, unsigned long tx_flags) @@ -65,7 +65,7 @@ static inline struct dma_async_tx_descriptor *vchan_tx_prep(struct virt_dma_chan /** * vchan_issue_pending - move submitted descriptors to issued list - * vc: virtual channel to update + * @vc: virtual channel to update * * vc.lock must be held by caller */ @@ -77,7 +77,7 @@ static inline bool vchan_issue_pending(struct virt_dma_chan *vc) /** * vchan_cookie_complete - report completion of a descriptor - * vd: virtual descriptor to update + * @vd: virtual descriptor to update * * vc.lock must be held by caller */ @@ -97,7 +97,7 @@ static inline void vchan_cookie_complete(struct virt_dma_desc *vd) /** * vchan_cyclic_callback - report the completion of a period - * vd: virtual descriptor + * @vd: virtual descriptor */ static inline void vchan_cyclic_callback(struct virt_dma_desc *vd) { @@ -109,7 +109,7 @@ static inline void vchan_cyclic_callback(struct virt_dma_desc *vd) /** * vchan_next_desc - peek at the next descriptor to be processed - * vc: virtual channel to obtain descriptor from + * @vc: virtual channel to obtain descriptor from * * vc.lock must be held by caller */ @@ -123,8 +123,8 @@ static inline struct virt_dma_desc *vchan_next_desc(struct virt_dma_chan *vc) /** * vchan_get_all_descriptors - obtain all submitted and issued descriptors - * vc: virtual channel to get descriptors from - * head: list of descriptors found + * @vc: virtual channel to get descriptors from + * @head: list of descriptors found * * vc.lock must be held by caller * diff --git a/drivers/dma/xgene-dma.c b/drivers/dma/xgene-dma.c index 8d57b1b..9dfa2b0 100644 --- a/drivers/dma/xgene-dma.c +++ b/drivers/dma/xgene-dma.c @@ -547,14 +547,12 @@ static struct xgene_dma_desc_sw *xgene_dma_alloc_descriptor( struct xgene_dma_desc_sw *desc; dma_addr_t phys; - desc = dma_pool_alloc(chan->desc_pool, GFP_NOWAIT, &phys); + desc = dma_pool_zalloc(chan->desc_pool, GFP_NOWAIT, &phys); if (!desc) { chan_err(chan, "Failed to allocate LDs\n"); return NULL; } - memset(desc, 0, sizeof(*desc)); - INIT_LIST_HEAD(&desc->tx_list); desc->tx.phys = phys; desc->tx.tx_submit = xgene_dma_tx_submit; @@ -894,60 +892,6 @@ static void xgene_dma_free_chan_resources(struct dma_chan *dchan) chan->desc_pool = NULL; } -static struct dma_async_tx_descriptor *xgene_dma_prep_memcpy( - struct dma_chan *dchan, dma_addr_t dst, dma_addr_t src, - size_t len, unsigned long flags) -{ - struct xgene_dma_desc_sw *first = NULL, *new; - struct xgene_dma_chan *chan; - size_t copy; - - if (unlikely(!dchan || !len)) - return NULL; - - chan = to_dma_chan(dchan); - - do { - /* Allocate the link descriptor from DMA pool */ - new = xgene_dma_alloc_descriptor(chan); - if (!new) - goto fail; - - /* Create the largest transaction possible */ - copy = min_t(size_t, len, XGENE_DMA_MAX_64B_DESC_BYTE_CNT); - - /* Prepare DMA descriptor */ - xgene_dma_prep_cpy_desc(chan, new, dst, src, copy); - - if (!first) - first = new; - - new->tx.cookie = 0; - async_tx_ack(&new->tx); - - /* Update metadata */ - len -= copy; - dst += copy; - src += copy; - - /* Insert the link descriptor to the LD ring */ - list_add_tail(&new->node, &first->tx_list); - } while (len); - - new->tx.flags = flags; /* client is in control of this ack */ - new->tx.cookie = -EBUSY; - list_splice(&first->tx_list, &new->tx_list); - - return &new->tx; - -fail: - if (!first) - return NULL; - - xgene_dma_free_desc_list(chan, &first->tx_list); - return NULL; -} - static struct dma_async_tx_descriptor *xgene_dma_prep_sg( struct dma_chan *dchan, struct scatterlist *dst_sg, u32 dst_nents, struct scatterlist *src_sg, @@ -1707,7 +1651,6 @@ static void xgene_dma_set_caps(struct xgene_dma_chan *chan, dma_cap_zero(dma_dev->cap_mask); /* Set DMA device capability */ - dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask); dma_cap_set(DMA_SG, dma_dev->cap_mask); /* Basically here, the X-Gene SoC DMA engine channel 0 supports XOR @@ -1734,7 +1677,6 @@ static void xgene_dma_set_caps(struct xgene_dma_chan *chan, dma_dev->device_free_chan_resources = xgene_dma_free_chan_resources; dma_dev->device_issue_pending = xgene_dma_issue_pending; dma_dev->device_tx_status = xgene_dma_tx_status; - dma_dev->device_prep_dma_memcpy = xgene_dma_prep_memcpy; dma_dev->device_prep_dma_sg = xgene_dma_prep_sg; if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { @@ -1787,8 +1729,7 @@ static int xgene_dma_async_register(struct xgene_dma *pdma, int id) /* DMA capability info */ dev_info(pdma->dev, - "%s: CAPABILITY ( %s%s%s%s)\n", dma_chan_name(&chan->dma_chan), - dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "MEMCPY " : "", + "%s: CAPABILITY ( %s%s%s)\n", dma_chan_name(&chan->dma_chan), dma_has_cap(DMA_SG, dma_dev->cap_mask) ? "SGCPY " : "", dma_has_cap(DMA_XOR, dma_dev->cap_mask) ? "XOR " : "", dma_has_cap(DMA_PQ, dma_dev->cap_mask) ? "PQ " : ""); diff --git a/drivers/dma/xilinx/xilinx_vdma.c b/drivers/dma/xilinx/xilinx_vdma.c index d8434d46..6f4b501 100644 --- a/drivers/dma/xilinx/xilinx_vdma.c +++ b/drivers/dma/xilinx/xilinx_vdma.c @@ -1349,6 +1349,7 @@ static const struct of_device_id xilinx_vdma_of_ids[] = { { .compatible = "xlnx,axi-vdma-1.00.a",}, {} }; +MODULE_DEVICE_TABLE(of, xilinx_vdma_of_ids); static struct platform_driver xilinx_vdma_driver = { .driver = { diff --git a/drivers/dma/zx296702_dma.c b/drivers/dma/zx296702_dma.c index c017fcd..245d759 100644 --- a/drivers/dma/zx296702_dma.c +++ b/drivers/dma/zx296702_dma.c @@ -441,7 +441,7 @@ static struct zx_dma_desc_sw *zx_alloc_desc_resource(int num, kfree(ds); return NULL; } - memset(ds->desc_hw, sizeof(struct zx_desc_hw) * num, 0); + memset(ds->desc_hw, 0, sizeof(struct zx_desc_hw) * num); ds->desc_num = num; return ds; } diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h index 98ba752..36112cd 100644 --- a/include/linux/of_dma.h +++ b/include/linux/of_dma.h @@ -34,7 +34,7 @@ struct of_dma_filter_info { dma_filter_fn filter_fn; }; -#ifdef CONFIG_OF +#ifdef CONFIG_DMA_OF extern int of_dma_controller_register(struct device_node *np, struct dma_chan *(*of_dma_xlate) (struct of_phandle_args *, struct of_dma *), diff --git a/include/linux/platform_data/dma-dw.h b/include/linux/platform_data/dma-dw.h index 87ac14c..03b6095 100644 --- a/include/linux/platform_data/dma-dw.h +++ b/include/linux/platform_data/dma-dw.h @@ -37,6 +37,7 @@ struct dw_dma_slave { * @nr_channels: Number of channels supported by hardware (max 8) * @is_private: The device channels should be marked as private and not for * by the general purpose DMA channel allocator. + * @is_memcpy: The device channels do support memory-to-memory transfers. * @chan_allocation_order: Allocate channels starting from 0 or 7 * @chan_priority: Set channel priority increasing from 0 to 7 or 7 to 0. * @block_size: Maximum block size supported by the controller @@ -47,6 +48,7 @@ struct dw_dma_slave { struct dw_dma_platform_data { unsigned int nr_channels; bool is_private; + bool is_memcpy; #define CHAN_ALLOCATION_ASCENDING 0 /* zero to seven */ #define CHAN_ALLOCATION_DESCENDING 1 /* seven to zero */ unsigned char chan_allocation_order; diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h index bdb2710..e2878ba 100644 --- a/include/linux/platform_data/edma.h +++ b/include/linux/platform_data/edma.h @@ -41,51 +41,6 @@ #ifndef EDMA_H_ #define EDMA_H_ -/* PaRAM slots are laid out like this */ -struct edmacc_param { - u32 opt; - u32 src; - u32 a_b_cnt; - u32 dst; - u32 src_dst_bidx; - u32 link_bcntrld; - u32 src_dst_cidx; - u32 ccnt; -} __packed; - -/* fields in edmacc_param.opt */ -#define SAM BIT(0) -#define DAM BIT(1) -#define SYNCDIM BIT(2) -#define STATIC BIT(3) -#define EDMA_FWID (0x07 << 8) -#define TCCMODE BIT(11) -#define EDMA_TCC(t) ((t) << 12) -#define TCINTEN BIT(20) -#define ITCINTEN BIT(21) -#define TCCHEN BIT(22) -#define ITCCHEN BIT(23) - -/*ch_status paramater of callback function possible values*/ -#define EDMA_DMA_COMPLETE 1 -#define EDMA_DMA_CC_ERROR 2 -#define EDMA_DMA_TC1_ERROR 3 -#define EDMA_DMA_TC2_ERROR 4 - -enum address_mode { - INCR = 0, - FIFO = 1 -}; - -enum fifo_width { - W8BIT = 0, - W16BIT = 1, - W32BIT = 2, - W64BIT = 3, - W128BIT = 4, - W256BIT = 5 -}; - enum dma_event_q { EVENTQ_0 = 0, EVENTQ_1 = 1, @@ -94,64 +49,10 @@ enum dma_event_q { EVENTQ_DEFAULT = -1 }; -enum sync_dimension { - ASYNC = 0, - ABSYNC = 1 -}; - #define EDMA_CTLR_CHAN(ctlr, chan) (((ctlr) << 16) | (chan)) #define EDMA_CTLR(i) ((i) >> 16) #define EDMA_CHAN_SLOT(i) ((i) & 0xffff) -#define EDMA_CHANNEL_ANY -1 /* for edma_alloc_channel() */ -#define EDMA_SLOT_ANY -1 /* for edma_alloc_slot() */ -#define EDMA_CONT_PARAMS_ANY 1001 -#define EDMA_CONT_PARAMS_FIXED_EXACT 1002 -#define EDMA_CONT_PARAMS_FIXED_NOT_EXACT 1003 - -#define EDMA_MAX_CC 2 - -/* alloc/free DMA channels and their dedicated parameter RAM slots */ -int edma_alloc_channel(int channel, - void (*callback)(unsigned channel, u16 ch_status, void *data), - void *data, enum dma_event_q); -void edma_free_channel(unsigned channel); - -/* alloc/free parameter RAM slots */ -int edma_alloc_slot(unsigned ctlr, int slot); -void edma_free_slot(unsigned slot); - -/* alloc/free a set of contiguous parameter RAM slots */ -int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count); -int edma_free_cont_slots(unsigned slot, int count); - -/* calls that operate on part of a parameter RAM slot */ -void edma_set_src(unsigned slot, dma_addr_t src_port, - enum address_mode mode, enum fifo_width); -void edma_set_dest(unsigned slot, dma_addr_t dest_port, - enum address_mode mode, enum fifo_width); -dma_addr_t edma_get_position(unsigned slot, bool dst); -void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx); -void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx); -void edma_set_transfer_params(unsigned slot, u16 acnt, u16 bcnt, u16 ccnt, - u16 bcnt_rld, enum sync_dimension sync_mode); -void edma_link(unsigned from, unsigned to); -void edma_unlink(unsigned from); - -/* calls that operate on an entire parameter RAM slot */ -void edma_write_slot(unsigned slot, const struct edmacc_param *params); -void edma_read_slot(unsigned slot, struct edmacc_param *params); - -/* channel control operations */ -int edma_start(unsigned channel); -void edma_stop(unsigned channel); -void edma_clean_channel(unsigned channel); -void edma_clear_event(unsigned channel); -void edma_pause(unsigned channel); -void edma_resume(unsigned channel); - -void edma_assign_channel_eventq(unsigned channel, enum dma_event_q eventq_no); - struct edma_rsv_info { const s16 (*rsv_chans)[2]; @@ -170,10 +71,11 @@ struct edma_soc_info { /* Resource reservation for other cores */ struct edma_rsv_info *rsv; + /* List of channels allocated for memcpy, terminated with -1 */ + s16 *memcpy_channels; + s8 (*queue_priority_mapping)[2]; const s16 (*xbar_chans)[2]; }; -int edma_trigger_channel(unsigned); - #endif |
