| /***********************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__ */ |
