Linux-2.6.33.2/drivers/staging/octeon/cvmx-ipd.h
/***********************license start***************
* Author: Cavium Networks
*
* Contact: support@caviumnetworks.com
* This file is part of the OCTEON SDK
*
* Copyright (c) 2003-2008 Cavium Networks
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* or visit http://www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
***********************license end**************************************/
/**
*
* Interface to the hardware Input Packet Data unit.
*/
#ifndef __CVMX_IPD_H__
#define __CVMX_IPD_H__
#include <asm/octeon/octeon-feature.h>
#include <asm/octeon/cvmx-ipd-defs.h>
enum cvmx_ipd_mode {
CVMX_IPD_OPC_MODE_STT = 0LL, /* All blocks DRAM, not cached in L2 */
CVMX_IPD_OPC_MODE_STF = 1LL, /* All bloccks into L2 */
CVMX_IPD_OPC_MODE_STF1_STT = 2LL, /* 1st block L2, rest DRAM */
CVMX_IPD_OPC_MODE_STF2_STT = 3LL /* 1st, 2nd blocks L2, rest DRAM */
};
#ifndef CVMX_ENABLE_LEN_M8_FIX
#define CVMX_ENABLE_LEN_M8_FIX 0
#endif
/* CSR typedefs have been moved to cvmx-csr-*.h */
typedef union cvmx_ipd_1st_mbuff_skip cvmx_ipd_mbuff_first_skip_t;
typedef union cvmx_ipd_1st_next_ptr_back cvmx_ipd_first_next_ptr_back_t;
typedef cvmx_ipd_mbuff_first_skip_t cvmx_ipd_mbuff_not_first_skip_t;
typedef cvmx_ipd_first_next_ptr_back_t cvmx_ipd_second_next_ptr_back_t;
/**
* Configure IPD
*
* @mbuff_size: Packets buffer size in 8 byte words
* @first_mbuff_skip:
* Number of 8 byte words to skip in the first buffer
* @not_first_mbuff_skip:
* Number of 8 byte words to skip in each following buffer
* @first_back: Must be same as first_mbuff_skip / 128
* @second_back:
* Must be same as not_first_mbuff_skip / 128
* @wqe_fpa_pool:
* FPA pool to get work entries from
* @cache_mode:
* @back_pres_enable_flag:
* Enable or disable port back pressure
*/
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,
enum cvmx_ipd_mode cache_mode,
uint64_t back_pres_enable_flag)
{
cvmx_ipd_mbuff_first_skip_t first_skip;
cvmx_ipd_mbuff_not_first_skip_t not_first_skip;
union cvmx_ipd_packet_mbuff_size size;
cvmx_ipd_first_next_ptr_back_t first_back_struct;
cvmx_ipd_second_next_ptr_back_t second_back_struct;
union cvmx_ipd_wqe_fpa_queue wqe_pool;
union cvmx_ipd_ctl_status 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)
{
union cvmx_ipd_ctl_status 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 = TRUE;
#endif
cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
}
/**
* Disable IPD
*/
static inline void cvmx_ipd_disable(void)
{
union cvmx_ipd_ctl_status 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);
}
/**
* Supportive function for cvmx_fpa_shutdown_pool.
*/
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_PASS1)
&& !OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) {
int no_wptr = 0;
union cvmx_ipd_ptr_count 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)) {
union cvmx_ipd_ctl_status 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) {
union cvmx_ipd_wqe_ptr_valid 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;
union cvmx_ipd_pwp_ptr_fifo_ctl 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) {
union cvmx_ipd_pkt_ptr_valid ipd_pkt_ptr_valid;
ipd_pkt_ptr_valid.u64 =
cvmx_read_csr(CVMX_IPD_PKT_PTR_VALID);
cvmx_fpa_free(cvmx_phys_to_ptr
(ipd_pkt_ptr_valid.s.ptr << 7),
CVMX_FPA_PACKET_POOL, 0);
}
/* Free the per port prefetched packets */
if (1) {
int i;
union cvmx_ipd_prc_port_ptr_fifo_ctl
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;
union cvmx_ipd_prc_hold_ptr_fifo_ctl
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;
union cvmx_ipd_pwp_ptr_fifo_ctl 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);
}
/* Reset the IPD to get all buffers out of it */
{
union cvmx_ipd_ctl_status ipd_ctl_status;
ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
ipd_ctl_status.s.reset = 1;
cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
}
/* Reset the PIP */
{
union cvmx_pip_sft_rst pip_sft_rst;
pip_sft_rst.u64 = cvmx_read_csr(CVMX_PIP_SFT_RST);
pip_sft_rst.s.rst = 1;
cvmx_write_csr(CVMX_PIP_SFT_RST, pip_sft_rst.u64);
}
}
}
#endif /* __CVMX_IPD_H__ */