diff options
Diffstat (limited to 'drivers/bus/fsl-mc')
| -rw-r--r-- | drivers/bus/fsl-mc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/dpcon.c | 222 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-private.h | 48 |
3 files changed, 271 insertions, 0 deletions
diff --git a/drivers/bus/fsl-mc/Makefile b/drivers/bus/fsl-mc/Makefile index da26e52..3c518c7 100644 --- a/drivers/bus/fsl-mc/Makefile +++ b/drivers/bus/fsl-mc/Makefile @@ -10,6 +10,7 @@ mc-bus-driver-objs := fsl-mc-bus.o \ mc-sys.o \ mc-io.o \ dpbp.o \ + dpcon.o \ dprc.o \ dprc-driver.o \ fsl-mc-allocator.o \ diff --git a/drivers/bus/fsl-mc/dpcon.c b/drivers/bus/fsl-mc/dpcon.c new file mode 100644 index 0000000..a1ba819 --- /dev/null +++ b/drivers/bus/fsl-mc/dpcon.c @@ -0,0 +1,222 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) +/* + * Copyright 2013-2016 Freescale Semiconductor Inc. + * + */ +#include <linux/kernel.h> +#include <linux/fsl/mc.h> +#include <linux/fsl/mc.h> + +#include "fsl-mc-private.h" + +/** + * dpcon_open() - Open a control session for the specified object + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @dpcon_id: DPCON unique ID + * @token: Returned token; use in subsequent API calls + * + * This function can be used to open a control session for an + * already created object; an object may have been declared in + * the DPL or by calling the dpcon_create() function. + * This function returns a unique authentication token, + * associated with the specific object ID and the specific MC + * portal; this token must be used in all subsequent commands for + * this specific object. + * + * Return: '0' on Success; Error code otherwise. + */ +int dpcon_open(struct fsl_mc_io *mc_io, + u32 cmd_flags, + int dpcon_id, + u16 *token) +{ + struct mc_command cmd = { 0 }; + struct dpcon_cmd_open *dpcon_cmd; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_OPEN, + cmd_flags, + 0); + dpcon_cmd = (struct dpcon_cmd_open *)cmd.params; + dpcon_cmd->dpcon_id = cpu_to_le32(dpcon_id); + + /* send command to mc*/ + err = mc_send_command(mc_io, &cmd); + if (err) + return err; + + /* retrieve response parameters */ + *token = mc_cmd_hdr_read_token(&cmd); + + return 0; +} +EXPORT_SYMBOL_GPL(dpcon_open); + +/** + * dpcon_close() - Close the control session of the object + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * + * After this function is called, no further operations are + * allowed on the object without opening a new control session. + * + * Return: '0' on Success; Error code otherwise. + */ +int dpcon_close(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_CLOSE, + cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_close); + +/** + * dpcon_enable() - Enable the DPCON + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * + * Return: '0' on Success; Error code otherwise + */ +int dpcon_enable(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_ENABLE, + cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_enable); + +/** + * dpcon_disable() - Disable the DPCON + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * + * Return: '0' on Success; Error code otherwise + */ +int dpcon_disable(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_DISABLE, + cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_disable); + +/** + * dpcon_reset() - Reset the DPCON, returns the object to initial state. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpcon_reset(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_RESET, + cmd_flags, token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_reset); + +/** + * dpcon_get_attributes() - Retrieve DPCON attributes. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * @attr: Object's attributes + * + * Return: '0' on Success; Error code otherwise. + */ +int dpcon_get_attributes(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token, + struct dpcon_attr *attr) +{ + struct mc_command cmd = { 0 }; + struct dpcon_rsp_get_attr *dpcon_rsp; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_GET_ATTR, + cmd_flags, + token); + + /* send command to mc*/ + err = mc_send_command(mc_io, &cmd); + if (err) + return err; + + /* retrieve response parameters */ + dpcon_rsp = (struct dpcon_rsp_get_attr *)cmd.params; + attr->id = le32_to_cpu(dpcon_rsp->id); + attr->qbman_ch_id = le16_to_cpu(dpcon_rsp->qbman_ch_id); + attr->num_priorities = dpcon_rsp->num_priorities; + + return 0; +} +EXPORT_SYMBOL_GPL(dpcon_get_attributes); + +/** + * dpcon_set_notification() - Set DPCON notification destination + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * @cfg: Notification parameters + * + * Return: '0' on Success; Error code otherwise + */ +int dpcon_set_notification(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token, + struct dpcon_notification_cfg *cfg) +{ + struct mc_command cmd = { 0 }; + struct dpcon_cmd_set_notification *dpcon_cmd; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_SET_NOTIFICATION, + cmd_flags, + token); + dpcon_cmd = (struct dpcon_cmd_set_notification *)cmd.params; + dpcon_cmd->dpio_id = cpu_to_le32(cfg->dpio_id); + dpcon_cmd->priority = cfg->priority; + dpcon_cmd->user_ctx = cpu_to_le64(cfg->user_ctx); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_set_notification); diff --git a/drivers/bus/fsl-mc/fsl-mc-private.h b/drivers/bus/fsl-mc/fsl-mc-private.h index 4ef8d7e..52c069d 100644 --- a/drivers/bus/fsl-mc/fsl-mc-private.h +++ b/drivers/bus/fsl-mc/fsl-mc-private.h @@ -418,6 +418,54 @@ struct dpbp_rsp_get_attributes { __le16 version_minor; }; +/* + * Data Path Concentrator (DPCON) API + */ + +/* DPCON Version */ +#define DPCON_VER_MAJOR 3 +#define DPCON_VER_MINOR 2 + +/* Command versioning */ +#define DPCON_CMD_BASE_VERSION 1 +#define DPCON_CMD_ID_OFFSET 4 + +#define DPCON_CMD(id) (((id) << DPCON_CMD_ID_OFFSET) | DPCON_CMD_BASE_VERSION) + +/* Command IDs */ +#define DPCON_CMDID_CLOSE DPCON_CMD(0x800) +#define DPCON_CMDID_OPEN DPCON_CMD(0x808) + +#define DPCON_CMDID_ENABLE DPCON_CMD(0x002) +#define DPCON_CMDID_DISABLE DPCON_CMD(0x003) +#define DPCON_CMDID_GET_ATTR DPCON_CMD(0x004) +#define DPCON_CMDID_RESET DPCON_CMD(0x005) + +#define DPCON_CMDID_SET_NOTIFICATION DPCON_CMD(0x100) + +struct dpcon_cmd_open { + __le32 dpcon_id; +}; + +#define DPCON_ENABLE 1 + +struct dpcon_rsp_get_attr { + /* response word 0 */ + __le32 id; + __le16 qbman_ch_id; + u8 num_priorities; + u8 pad; +}; + +struct dpcon_cmd_set_notification { + /* cmd word 0 */ + __le32 dpio_id; + u8 priority; + u8 pad[3]; + /* cmd word 1 */ + __le64 user_ctx; +}; + /** * Maximum number of total IRQs that can be pre-allocated for an MC bus' * IRQ pool |
