arch/mips/include/asm/octeon/cvmx-ipd.h

   1 /***********************license start***************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2008 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26  ***********************license end**************************************/
  27
  28 /**
  29  *
  30  * Interface to the hardware Input Packet Data unit.
  31  */
  32
  33 #ifndef __CVMX_IPD_H__
  34 #define __CVMX_IPD_H__
  35
  36 #include <asm/octeon/octeon-feature.h>
  37
  38 #include <asm/octeon/cvmx-ipd-defs.h>
  39 #include <asm/octeon/cvmx-pip-defs.h>
  40
  41 enum cvmx_ipd_mode {
  42    CVMX_IPD_OPC_MODE_STT = 0LL,   /* All blocks DRAM, not cached in L2 */
  43    CVMX_IPD_OPC_MODE_STF = 1LL,   /* All blocks into  L2 */
  44    CVMX_IPD_OPC_MODE_STF1_STT = 2LL,   /* 1st block L2, rest DRAM */
  45    CVMX_IPD_OPC_MODE_STF2_STT = 3LL    /* 1st, 2nd blocks L2, rest DRAM */
  46 };
  47
  48 #ifndef CVMX_ENABLE_LEN_M8_FIX
  49 #define CVMX_ENABLE_LEN_M8_FIX 0
  50 #endif
  51
  52 /* CSR typedefs have been moved to cvmx-csr-*.h */
  53 typedef union cvmx_ipd_1st_mbuff_skip cvmx_ipd_mbuff_first_skip_t;
  54 typedef union cvmx_ipd_1st_next_ptr_back cvmx_ipd_first_next_ptr_back_t;
  55
  56 typedef cvmx_ipd_mbuff_first_skip_t cvmx_ipd_mbuff_not_first_skip_t;
  57 typedef cvmx_ipd_first_next_ptr_back_t cvmx_ipd_second_next_ptr_back_t;
  58
  59 /**
  60  * Configure IPD
  61  *
  62  * @mbuff_size: Packets buffer size in 8 byte words
  63  * @first_mbuff_skip:
  64  *                   Number of 8 byte words to skip in the first buffer
  65  * @not_first_mbuff_skip:
  66  *                   Number of 8 byte words to skip in each following buffer
  67  * @first_back: Must be same as first_mbuff_skip / 128
  68  * @second_back:
  69  *                   Must be same as not_first_mbuff_skip / 128
  70  * @wqe_fpa_pool:
  71  *                   FPA pool to get work entries from
  72  * @cache_mode:
  73  * @back_pres_enable_flag:
  74  *                   Enable or disable port back pressure
  75  */
  76 static inline void cvmx_ipd_config(uint64_t mbuff_size,
  77                                    uint64_t first_mbuff_skip,
  78                                    uint64_t not_first_mbuff_skip,
  79                                    uint64_t first_back,
  80                                    uint64_t second_back,
  81                                    uint64_t wqe_fpa_pool,
  82                                    enum cvmx_ipd_mode cache_mode,
  83                                    uint64_t back_pres_enable_flag)
  84 {
  85         cvmx_ipd_mbuff_first_skip_t first_skip;
  86         cvmx_ipd_mbuff_not_first_skip_t not_first_skip;
  87         union cvmx_ipd_packet_mbuff_size size;
  88         cvmx_ipd_first_next_ptr_back_t first_back_struct;
  89         cvmx_ipd_second_next_ptr_back_t second_back_struct;
  90         union cvmx_ipd_wqe_fpa_queue wqe_pool;
  91         union cvmx_ipd_ctl_status ipd_ctl_reg;
  92
  93         first_skip.u64 = 0;
  94         first_skip.s.skip_sz = first_mbuff_skip;
  95         cvmx_write_csr(CVMX_IPD_1ST_MBUFF_SKIP, first_skip.u64);
  96
  97         not_first_skip.u64 = 0;
  98         not_first_skip.s.skip_sz = not_first_mbuff_skip;
  99         cvmx_write_csr(CVMX_IPD_NOT_1ST_MBUFF_SKIP, not_first_skip.u64);
 100
 101         size.u64 = 0;
 102         size.s.mb_size = mbuff_size;
 103         cvmx_write_csr(CVMX_IPD_PACKET_MBUFF_SIZE, size.u64);
 104
 105         first_back_struct.u64 = 0;
 106         first_back_struct.s.back = first_back;
 107         cvmx_write_csr(CVMX_IPD_1st_NEXT_PTR_BACK, first_back_struct.u64);
 108
 109         second_back_struct.u64 = 0;
 110         second_back_struct.s.back = second_back;
 111         cvmx_write_csr(CVMX_IPD_2nd_NEXT_PTR_BACK, second_back_struct.u64);
 112
 113         wqe_pool.u64 = 0;
 114         wqe_pool.s.wqe_pool = wqe_fpa_pool;
 115         cvmx_write_csr(CVMX_IPD_WQE_FPA_QUEUE, wqe_pool.u64);
 116
 117         ipd_ctl_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 118         ipd_ctl_reg.s.opc_mode = cache_mode;
 119         ipd_ctl_reg.s.pbp_en = back_pres_enable_flag;
 120         cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_reg.u64);
 121
 122         /* Note: the example RED code that used to be here has been moved to
 123            cvmx_helper_setup_red */
 124 }
 125
 126 /**
 127  * Enable IPD
 128  */
 129 static inline void cvmx_ipd_enable(void)
 130 {
 131         union cvmx_ipd_ctl_status ipd_reg;
 132         ipd_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 133         if (ipd_reg.s.ipd_en) {
 134                 cvmx_dprintf
 135                     ("Warning: Enabling IPD when IPD already enabled.\n");
 136         }
 137         ipd_reg.s.ipd_en = 1;
 138 #if  CVMX_ENABLE_LEN_M8_FIX
 139         if (!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2))
 140                 ipd_reg.s.len_m8 = TRUE;
 141 #endif
 142         cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
 143 }
 144
 145 /**
 146  * Disable IPD
 147  */
 148 static inline void cvmx_ipd_disable(void)
 149 {
 150         union cvmx_ipd_ctl_status ipd_reg;
 151         ipd_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 152         ipd_reg.s.ipd_en = 0;
 153         cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
 154 }
 155
 156 /**
 157  * Supportive function for cvmx_fpa_shutdown_pool.
 158  */
 159 static inline void cvmx_ipd_free_ptr(void)
 160 {
 161         /* Only CN38XXp{1,2} cannot read pointer out of the IPD */
 162         if (!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1)
 163             && !OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) {
 164                 int no_wptr = 0;
 165                 union cvmx_ipd_ptr_count ipd_ptr_count;
 166                 ipd_ptr_count.u64 = cvmx_read_csr(CVMX_IPD_PTR_COUNT);
 167
 168                 /* Handle Work Queue Entry in cn56xx and cn52xx */
 169                 if (octeon_has_feature(OCTEON_FEATURE_NO_WPTR)) {
 170                         union cvmx_ipd_ctl_status ipd_ctl_status;
 171                         ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 172                         if (ipd_ctl_status.s.no_wptr)
 173                                 no_wptr = 1;
 174                 }
 175
 176                 /* Free the prefetched WQE */
 177                 if (ipd_ptr_count.s.wqev_cnt) {
 178                         union cvmx_ipd_wqe_ptr_valid ipd_wqe_ptr_valid;
 179                         ipd_wqe_ptr_valid.u64 =
 180                             cvmx_read_csr(CVMX_IPD_WQE_PTR_VALID);
 181                         if (no_wptr)
 182                                 cvmx_fpa_free(cvmx_phys_to_ptr
 183                                               ((uint64_t) ipd_wqe_ptr_valid.s.
 184                                                ptr << 7), CVMX_FPA_PACKET_POOL,
 185                                               0);
 186                         else
 187                                 cvmx_fpa_free(cvmx_phys_to_ptr
 188                                               ((uint64_t) ipd_wqe_ptr_valid.s.
 189                                                ptr << 7), CVMX_FPA_WQE_POOL, 0);
 190                 }
 191
 192                 /* Free all WQE in the fifo */
 193                 if (ipd_ptr_count.s.wqe_pcnt) {
 194                         int i;
 195                         union cvmx_ipd_pwp_ptr_fifo_ctl ipd_pwp_ptr_fifo_ctl;
 196                         ipd_pwp_ptr_fifo_ctl.u64 =
 197                             cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
 198                         for (i = 0; i < ipd_ptr_count.s.wqe_pcnt; i++) {
 199                                 ipd_pwp_ptr_fifo_ctl.s.cena = 0;
 200                                 ipd_pwp_ptr_fifo_ctl.s.raddr =
 201                                     ipd_pwp_ptr_fifo_ctl.s.max_cnts +
 202                                     (ipd_pwp_ptr_fifo_ctl.s.wraddr +
 203                                      i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
 204                                 cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
 205                                                ipd_pwp_ptr_fifo_ctl.u64);
 206                                 ipd_pwp_ptr_fifo_ctl.u64 =
 207                                     cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
 208                                 if (no_wptr)
 209                                         cvmx_fpa_free(cvmx_phys_to_ptr
 210                                                       ((uint64_t)
 211                                                        ipd_pwp_ptr_fifo_ctl.s.
 212                                                        ptr << 7),
 213                                                       CVMX_FPA_PACKET_POOL, 0);
 214                                 else
 215                                         cvmx_fpa_free(cvmx_phys_to_ptr
 216                                                       ((uint64_t)
 217                                                        ipd_pwp_ptr_fifo_ctl.s.
 218                                                        ptr << 7),
 219                                                       CVMX_FPA_WQE_POOL, 0);
 220                         }
 221                         ipd_pwp_ptr_fifo_ctl.s.cena = 1;
 222                         cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
 223                                        ipd_pwp_ptr_fifo_ctl.u64);
 224                 }
 225
 226                 /* Free the prefetched packet */
 227                 if (ipd_ptr_count.s.pktv_cnt) {
 228                         union cvmx_ipd_pkt_ptr_valid ipd_pkt_ptr_valid;
 229                         ipd_pkt_ptr_valid.u64 =
 230                             cvmx_read_csr(CVMX_IPD_PKT_PTR_VALID);
 231                         cvmx_fpa_free(cvmx_phys_to_ptr
 232                                       (ipd_pkt_ptr_valid.s.ptr << 7),
 233                                       CVMX_FPA_PACKET_POOL, 0);
 234                 }
 235
 236                 /* Free the per port prefetched packets */
 237                 if (1) {
 238                         int i;
 239                         union cvmx_ipd_prc_port_ptr_fifo_ctl
 240                             ipd_prc_port_ptr_fifo_ctl;
 241                         ipd_prc_port_ptr_fifo_ctl.u64 =
 242                             cvmx_read_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
 243
 244                         for (i = 0; i < ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
 245                              i++) {
 246                                 ipd_prc_port_ptr_fifo_ctl.s.cena = 0;
 247                                 ipd_prc_port_ptr_fifo_ctl.s.raddr =
 248                                     i % ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
 249                                 cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL,
 250                                                ipd_prc_port_ptr_fifo_ctl.u64);
 251                                 ipd_prc_port_ptr_fifo_ctl.u64 =
 252                                     cvmx_read_csr
 253                                     (CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
 254                                 cvmx_fpa_free(cvmx_phys_to_ptr
 255                                               ((uint64_t)
 256                                                ipd_prc_port_ptr_fifo_ctl.s.
 257                                                ptr << 7), CVMX_FPA_PACKET_POOL,
 258                                               0);
 259                         }
 260                         ipd_prc_port_ptr_fifo_ctl.s.cena = 1;
 261                         cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL,
 262                                        ipd_prc_port_ptr_fifo_ctl.u64);
 263                 }
 264
 265                 /* Free all packets in the holding fifo */
 266                 if (ipd_ptr_count.s.pfif_cnt) {
 267                         int i;
 268                         union cvmx_ipd_prc_hold_ptr_fifo_ctl
 269                             ipd_prc_hold_ptr_fifo_ctl;
 270
 271                         ipd_prc_hold_ptr_fifo_ctl.u64 =
 272                             cvmx_read_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
 273
 274                         for (i = 0; i < ipd_ptr_count.s.pfif_cnt; i++) {
 275                                 ipd_prc_hold_ptr_fifo_ctl.s.cena = 0;
 276                                 ipd_prc_hold_ptr_fifo_ctl.s.raddr =
 277                                     (ipd_prc_hold_ptr_fifo_ctl.s.praddr +
 278                                      i) % ipd_prc_hold_ptr_fifo_ctl.s.max_pkt;
 279                                 cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL,
 280                                                ipd_prc_hold_ptr_fifo_ctl.u64);
 281                                 ipd_prc_hold_ptr_fifo_ctl.u64 =
 282                                     cvmx_read_csr
 283                                     (CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
 284                                 cvmx_fpa_free(cvmx_phys_to_ptr
 285                                               ((uint64_t)
 286                                                ipd_prc_hold_ptr_fifo_ctl.s.
 287                                                ptr << 7), CVMX_FPA_PACKET_POOL,
 288                                               0);
 289                         }
 290                         ipd_prc_hold_ptr_fifo_ctl.s.cena = 1;
 291                         cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL,
 292                                        ipd_prc_hold_ptr_fifo_ctl.u64);
 293                 }
 294
 295                 /* Free all packets in the fifo */
 296                 if (ipd_ptr_count.s.pkt_pcnt) {
 297                         int i;
 298                         union cvmx_ipd_pwp_ptr_fifo_ctl ipd_pwp_ptr_fifo_ctl;
 299                         ipd_pwp_ptr_fifo_ctl.u64 =
 300                             cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
 301
 302                         for (i = 0; i < ipd_ptr_count.s.pkt_pcnt; i++) {
 303                                 ipd_pwp_ptr_fifo_ctl.s.cena = 0;
 304                                 ipd_pwp_ptr_fifo_ctl.s.raddr =
 305                                     (ipd_pwp_ptr_fifo_ctl.s.praddr +
 306                                      i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
 307                                 cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
 308                                                ipd_pwp_ptr_fifo_ctl.u64);
 309                                 ipd_pwp_ptr_fifo_ctl.u64 =
 310                                     cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
 311                                 cvmx_fpa_free(cvmx_phys_to_ptr
 312                                               ((uint64_t) ipd_pwp_ptr_fifo_ctl.
 313                                                s.ptr << 7),
 314                                               CVMX_FPA_PACKET_POOL, 0);
 315                         }
 316                         ipd_pwp_ptr_fifo_ctl.s.cena = 1;
 317                         cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
 318                                        ipd_pwp_ptr_fifo_ctl.u64);
 319                 }
 320
 321                 /* Reset the IPD to get all buffers out of it */
 322                 {
 323                         union cvmx_ipd_ctl_status ipd_ctl_status;
 324                         ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 325                         ipd_ctl_status.s.reset = 1;
 326                         cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 327                 }
 328
 329                 /* Reset the PIP */
 330                 {
 331                         union cvmx_pip_sft_rst pip_sft_rst;
 332                         pip_sft_rst.u64 = cvmx_read_csr(CVMX_PIP_SFT_RST);
 333                         pip_sft_rst.s.rst = 1;
 334                         cvmx_write_csr(CVMX_PIP_SFT_RST, pip_sft_rst.u64);
 335                 }
 336         }
 337 }
 338
 339 #endif /*  __CVMX_IPD_H__ */