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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Cavium Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* Interface to the hardware Input Packet Data unit.
*
* <hr>$Revision: 49448 $<hr>
*/
#ifndef __CVMX_IPD_H__
#define __CVMX_IPD_H__
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-ipd-defs.h>
#else
# ifndef CVMX_DONT_INCLUDE_CONFIG
# include "executive-config.h"
# ifdef CVMX_ENABLE_PKO_FUNCTIONS
# include "cvmx-config.h"
# endif
# endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifndef CVMX_ENABLE_LEN_M8_FIX
#define CVMX_ENABLE_LEN_M8_FIX 0
#endif
/* CSR typedefs have been moved to cvmx-ipd-defs.h */
typedef cvmx_ipd_1st_mbuff_skip_t cvmx_ipd_mbuff_not_first_skip_t;
typedef cvmx_ipd_1st_next_ptr_back_t cvmx_ipd_second_next_ptr_back_t;
/**
* Configure IPD
*
* @param mbuff_size Packets buffer size in 8 byte words
* @param first_mbuff_skip
* Number of 8 byte words to skip in the first buffer
* @param not_first_mbuff_skip
* Number of 8 byte words to skip in each following buffer
* @param first_back Must be same as first_mbuff_skip / 128
* @param second_back
* Must be same as not_first_mbuff_skip / 128
* @param wqe_fpa_pool
* FPA pool to get work entries from
* @param cache_mode
* @param back_pres_enable_flag
* Enable or disable port back pressure at a global level.
* This should always be 1 as more accurate control can be
* found in IPD_PORTX_BP_PAGE_CNT[BP_ENB].
*/
static inline void cvmx_ipd_config(uint64_t mbuff_size,
uint64_t first_mbuff_skip,
uint64_t not_first_mbuff_skip,
uint64_t first_back,
uint64_t second_back,
uint64_t wqe_fpa_pool,
cvmx_ipd_mode_t cache_mode,
uint64_t back_pres_enable_flag
)
{
cvmx_ipd_1st_mbuff_skip_t first_skip;
cvmx_ipd_mbuff_not_first_skip_t not_first_skip;
cvmx_ipd_packet_mbuff_size_t size;
cvmx_ipd_1st_next_ptr_back_t first_back_struct;
cvmx_ipd_second_next_ptr_back_t second_back_struct;
cvmx_ipd_wqe_fpa_queue_t wqe_pool;
cvmx_ipd_ctl_status_t ipd_ctl_reg;
first_skip.u64 = 0;
first_skip.s.skip_sz = first_mbuff_skip;
cvmx_write_csr(CVMX_IPD_1ST_MBUFF_SKIP, first_skip.u64);
not_first_skip.u64 = 0;
not_first_skip.s.skip_sz = not_first_mbuff_skip;
cvmx_write_csr(CVMX_IPD_NOT_1ST_MBUFF_SKIP, not_first_skip.u64);
size.u64 = 0;
size.s.mb_size = mbuff_size;
cvmx_write_csr(CVMX_IPD_PACKET_MBUFF_SIZE, size.u64);
first_back_struct.u64 = 0;
first_back_struct.s.back = first_back;
cvmx_write_csr(CVMX_IPD_1st_NEXT_PTR_BACK, first_back_struct.u64);
second_back_struct.u64 = 0;
second_back_struct.s.back = second_back;
cvmx_write_csr(CVMX_IPD_2nd_NEXT_PTR_BACK,second_back_struct.u64);
wqe_pool.u64 = 0;
wqe_pool.s.wqe_pool = wqe_fpa_pool;
cvmx_write_csr(CVMX_IPD_WQE_FPA_QUEUE, wqe_pool.u64);
ipd_ctl_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
ipd_ctl_reg.s.opc_mode = cache_mode;
ipd_ctl_reg.s.pbp_en = back_pres_enable_flag;
cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_reg.u64);
/* Note: the example RED code that used to be here has been moved to
cvmx_helper_setup_red */
}
/**
* Enable IPD
*/
static inline void cvmx_ipd_enable(void)
{
cvmx_ipd_ctl_status_t ipd_reg;
ipd_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
if (ipd_reg.s.ipd_en)
{
cvmx_dprintf("Warning: Enabling IPD when IPD already enabled.\n");
}
ipd_reg.s.ipd_en = 1;
#if CVMX_ENABLE_LEN_M8_FIX
if(!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) {
ipd_reg.s.len_m8 = 1;
}
#endif
cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
}
/**
* Disable IPD
*/
static inline void cvmx_ipd_disable(void)
{
cvmx_ipd_ctl_status_t ipd_reg;
ipd_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
ipd_reg.s.ipd_en = 0;
cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
}
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
/**
* @INTERNAL
* This function is called by cvmx_helper_shutdown() to extract
* all FPA buffers out of the IPD and PIP. After this function
* completes, all FPA buffers that were prefetched by IPD and PIP
* wil be in the apropriate FPA pool. This functions does not reset
* PIP or IPD as FPA pool zero must be empty before the reset can
* be performed. WARNING: It is very important that IPD and PIP be
* reset soon after a call to this function.
*/
static inline void __cvmx_ipd_free_ptr(void)
{
/* Only CN38XXp{1,2} cannot read pointer out of the IPD */
if (!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) {
int no_wptr = 0;
cvmx_ipd_ptr_count_t ipd_ptr_count;
ipd_ptr_count.u64 = cvmx_read_csr(CVMX_IPD_PTR_COUNT);
/* Handle Work Queue Entry in cn56xx and cn52xx */
if (octeon_has_feature(OCTEON_FEATURE_NO_WPTR)) {
cvmx_ipd_ctl_status_t ipd_ctl_status;
ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
if (ipd_ctl_status.s.no_wptr)
no_wptr = 1;
}
/* Free the prefetched WQE */
if (ipd_ptr_count.s.wqev_cnt) {
cvmx_ipd_wqe_ptr_valid_t ipd_wqe_ptr_valid;
ipd_wqe_ptr_valid.u64 = cvmx_read_csr(CVMX_IPD_WQE_PTR_VALID);
if (no_wptr)
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_wqe_ptr_valid.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
else
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_wqe_ptr_valid.s.ptr<<7), CVMX_FPA_WQE_POOL, 0);
}
/* Free all WQE in the fifo */
if (ipd_ptr_count.s.wqe_pcnt) {
int i;
cvmx_ipd_pwp_ptr_fifo_ctl_t ipd_pwp_ptr_fifo_ctl;
ipd_pwp_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.wqe_pcnt; i++) {
ipd_pwp_ptr_fifo_ctl.s.cena = 0;
ipd_pwp_ptr_fifo_ctl.s.raddr = ipd_pwp_ptr_fifo_ctl.s.max_cnts + (ipd_pwp_ptr_fifo_ctl.s.wraddr+i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL, ipd_pwp_ptr_fifo_ctl.u64);
ipd_pwp_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
if (no_wptr)
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_pwp_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
else
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_pwp_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_WQE_POOL, 0);
}
ipd_pwp_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL, ipd_pwp_ptr_fifo_ctl.u64);
}
/* Free the prefetched packet */
if (ipd_ptr_count.s.pktv_cnt) {
cvmx_ipd_pkt_ptr_valid_t ipd_pkt_ptr_valid;
ipd_pkt_ptr_valid.u64 = cvmx_read_csr(CVMX_IPD_PKT_PTR_VALID);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_pkt_ptr_valid.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
/* Free the per port prefetched packets */
if (1) {
int i;
cvmx_ipd_prc_port_ptr_fifo_ctl_t ipd_prc_port_ptr_fifo_ctl;
ipd_prc_port_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
for (i = 0; i < ipd_prc_port_ptr_fifo_ctl.s.max_pkt; i++) {
ipd_prc_port_ptr_fifo_ctl.s.cena = 0;
ipd_prc_port_ptr_fifo_ctl.s.raddr = i % ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL, ipd_prc_port_ptr_fifo_ctl.u64);
ipd_prc_port_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_prc_port_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_prc_port_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL, ipd_prc_port_ptr_fifo_ctl.u64);
}
/* Free all packets in the holding fifo */
if (ipd_ptr_count.s.pfif_cnt) {
int i;
cvmx_ipd_prc_hold_ptr_fifo_ctl_t ipd_prc_hold_ptr_fifo_ctl;
ipd_prc_hold_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.pfif_cnt; i++) {
ipd_prc_hold_ptr_fifo_ctl.s.cena = 0;
ipd_prc_hold_ptr_fifo_ctl.s.raddr = (ipd_prc_hold_ptr_fifo_ctl.s.praddr + i) % ipd_prc_hold_ptr_fifo_ctl.s.max_pkt;
cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL, ipd_prc_hold_ptr_fifo_ctl.u64);
ipd_prc_hold_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_prc_hold_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_prc_hold_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL, ipd_prc_hold_ptr_fifo_ctl.u64);
}
/* Free all packets in the fifo */
if (ipd_ptr_count.s.pkt_pcnt) {
int i;
cvmx_ipd_pwp_ptr_fifo_ctl_t ipd_pwp_ptr_fifo_ctl;
ipd_pwp_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
for (i = 0; i < ipd_ptr_count.s.pkt_pcnt; i++) {
ipd_pwp_ptr_fifo_ctl.s.cena = 0;
ipd_pwp_ptr_fifo_ctl.s.raddr = (ipd_pwp_ptr_fifo_ctl.s.praddr+i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL, ipd_pwp_ptr_fifo_ctl.u64);
ipd_pwp_ptr_fifo_ctl.u64 = cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
cvmx_fpa_free(cvmx_phys_to_ptr((uint64_t)ipd_pwp_ptr_fifo_ctl.s.ptr<<7), CVMX_FPA_PACKET_POOL, 0);
}
ipd_pwp_ptr_fifo_ctl.s.cena = 1;
cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL, ipd_pwp_ptr_fifo_ctl.u64);
}
}
}
#endif
#ifdef __cplusplus
}
#endif
#endif /* __CVMX_IPD_H__ */
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