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   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
  40 enum cvmx_ipd_mode {
  41    CVMX_IPD_OPC_MODE_STT = 0LL,   /* All blocks DRAM, not cached in L2 */
  42    CVMX_IPD_OPC_MODE_STF = 1LL,   /* All bloccks into  L2 */
  43    CVMX_IPD_OPC_MODE_STF1_STT = 2LL,   /* 1st block L2, rest DRAM */
  44    CVMX_IPD_OPC_MODE_STF2_STT = 3LL    /* 1st, 2nd blocks L2, rest DRAM */
  45 };
  46
  47 #ifndef CVMX_ENABLE_LEN_M8_FIX
  48 #define CVMX_ENABLE_LEN_M8_FIX 0
  49 #endif
  50
  51 /* CSR typedefs have been moved to cvmx-csr-*.h */
  52 typedef union cvmx_ipd_1st_mbuff_skip cvmx_ipd_mbuff_first_skip_t;
  53 typedef union cvmx_ipd_1st_next_ptr_back cvmx_ipd_first_next_ptr_back_t;
  54
  55 typedef cvmx_ipd_mbuff_first_skip_t cvmx_ipd_mbuff_not_first_skip_t;
  56 typedef cvmx_ipd_first_next_ptr_back_t cvmx_ipd_second_next_ptr_back_t;
  57
  58 /**
  59  * Configure IPD
  60  *
  61  * @mbuff_size: Packets buffer size in 8 byte words
  62  * @first_mbuff_skip:
  63  *                   Number of 8 byte words to skip in the first buffer
  64  * @not_first_mbuff_skip:
  65  *                   Number of 8 byte words to skip in each following buffer
  66  * @first_back: Must be same as first_mbuff_skip / 128
  67  * @second_back:
  68  *                   Must be same as not_first_mbuff_skip / 128
  69  * @wqe_fpa_pool:
  70  *                   FPA pool to get work entries from
  71  * @cache_mode:
  72  * @back_pres_enable_flag:
  73  *                   Enable or disable port back pressure
  74  */
  75 static inline void cvmx_ipd_config(uint64_t mbuff_size,
  76                                    uint64_t first_mbuff_skip,
  77                                    uint64_t not_first_mbuff_skip,
  78                                    uint64_t first_back,
  79                                    uint64_t second_back,
  80                                    uint64_t wqe_fpa_pool,
  81                                    enum cvmx_ipd_mode cache_mode,
  82                                    uint64_t back_pres_enable_flag)
  83 {
  84         cvmx_ipd_mbuff_first_skip_t first_skip;
  85         cvmx_ipd_mbuff_not_first_skip_t not_first_skip;
  86         union cvmx_ipd_packet_mbuff_size size;
  87         cvmx_ipd_first_next_ptr_back_t first_back_struct;
  88         cvmx_ipd_second_next_ptr_back_t second_back_struct;
  89         union cvmx_ipd_wqe_fpa_queue wqe_pool;
  90         union cvmx_ipd_ctl_status ipd_ctl_reg;
  91
  92         first_skip.u64 = 0;
  93         first_skip.s.skip_sz = first_mbuff_skip;
  94         cvmx_write_csr(CVMX_IPD_1ST_MBUFF_SKIP, first_skip.u64);
  95
  96         not_first_skip.u64 = 0;
  97         not_first_skip.s.skip_sz = not_first_mbuff_skip;
  98         cvmx_write_csr(CVMX_IPD_NOT_1ST_MBUFF_SKIP, not_first_skip.u64);
  99
 100         size.u64 = 0;
 101         size.s.mb_size = mbuff_size;
 102         cvmx_write_csr(CVMX_IPD_PACKET_MBUFF_SIZE, size.u64);
 103
 104         first_back_struct.u64 = 0;
 105         first_back_struct.s.back = first_back;
 106         cvmx_write_csr(CVMX_IPD_1st_NEXT_PTR_BACK, first_back_struct.u64);
 107
 108         second_back_struct.u64 = 0;
 109         second_back_struct.s.back = second_back;
 110         cvmx_write_csr(CVMX_IPD_2nd_NEXT_PTR_BACK, second_back_struct.u64);
 111
 112         wqe_pool.u64 = 0;
 113         wqe_pool.s.wqe_pool = wqe_fpa_pool;
 114         cvmx_write_csr(CVMX_IPD_WQE_FPA_QUEUE, wqe_pool.u64);
 115
 116         ipd_ctl_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 117         ipd_ctl_reg.s.opc_mode = cache_mode;
 118         ipd_ctl_reg.s.pbp_en = back_pres_enable_flag;
 119         cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_reg.u64);
 120
 121         /* Note: the example RED code that used to be here has been moved to
 122            cvmx_helper_setup_red */
 123 }
 124
 125 /**
 126  * Enable IPD
 127  */
 128 static inline void cvmx_ipd_enable(void)
 129 {
 130         union cvmx_ipd_ctl_status ipd_reg;
 131         ipd_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 132         if (ipd_reg.s.ipd_en) {
 133                 cvmx_dprintf
 134                     ("Warning: Enabling IPD when IPD already enabled.\n");
 135         }
 136         ipd_reg.s.ipd_en = 1;
 137 #if  CVMX_ENABLE_LEN_M8_FIX
 138         if (!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2))
 139                 ipd_reg.s.len_m8 = TRUE;
 140 #endif
 141         cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
 142 }
 143
 144 /**
 145  * Disable IPD
 146  */
 147 static inline void cvmx_ipd_disable(void)
 148 {
 149         union cvmx_ipd_ctl_status ipd_reg;
 150         ipd_reg.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 151         ipd_reg.s.ipd_en = 0;
 152         cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_reg.u64);
 153 }
 154
 155 /**
 156  * Supportive function for cvmx_fpa_shutdown_pool.
 157  */
 158 static inline void cvmx_ipd_free_ptr(void)
 159 {
 160         /* Only CN38XXp{1,2} cannot read pointer out of the IPD */
 161         if (!OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1)
 162             && !OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) {
 163                 int no_wptr = 0;
 164                 union cvmx_ipd_ptr_count ipd_ptr_count;
 165                 ipd_ptr_count.u64 = cvmx_read_csr(CVMX_IPD_PTR_COUNT);
 166
 167                 /* Handle Work Queue Entry in cn56xx and cn52xx */
 168                 if (octeon_has_feature(OCTEON_FEATURE_NO_WPTR)) {
 169                         union cvmx_ipd_ctl_status ipd_ctl_status;
 170                         ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 171                         if (ipd_ctl_status.s.no_wptr)
 172                                 no_wptr = 1;
 173                 }
 174
 175                 /* Free the prefetched WQE */
 176                 if (ipd_ptr_count.s.wqev_cnt) {
 177                         union cvmx_ipd_wqe_ptr_valid ipd_wqe_ptr_valid;
 178                         ipd_wqe_ptr_valid.u64 =
 179                             cvmx_read_csr(CVMX_IPD_WQE_PTR_VALID);
 180                         if (no_wptr)
 181                                 cvmx_fpa_free(cvmx_phys_to_ptr
 182                                               ((uint64_t) ipd_wqe_ptr_valid.s.
 183                                                ptr << 7), CVMX_FPA_PACKET_POOL,
 184                                               0);
 185                         else
 186                                 cvmx_fpa_free(cvmx_phys_to_ptr
 187                                               ((uint64_t) ipd_wqe_ptr_valid.s.
 188                                                ptr << 7), CVMX_FPA_WQE_POOL, 0);
 189                 }
 190
 191                 /* Free all WQE in the fifo */
 192                 if (ipd_ptr_count.s.wqe_pcnt) {
 193                         int i;
 194                         union cvmx_ipd_pwp_ptr_fifo_ctl ipd_pwp_ptr_fifo_ctl;
 195                         ipd_pwp_ptr_fifo_ctl.u64 =
 196                             cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
 197                         for (i = 0; i < ipd_ptr_count.s.wqe_pcnt; i++) {
 198                                 ipd_pwp_ptr_fifo_ctl.s.cena = 0;
 199                                 ipd_pwp_ptr_fifo_ctl.s.raddr =
 200                                     ipd_pwp_ptr_fifo_ctl.s.max_cnts +
 201                                     (ipd_pwp_ptr_fifo_ctl.s.wraddr +
 202                                      i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
 203                                 cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
 204                                                ipd_pwp_ptr_fifo_ctl.u64);
 205                                 ipd_pwp_ptr_fifo_ctl.u64 =
 206                                     cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
 207                                 if (no_wptr)
 208                                         cvmx_fpa_free(cvmx_phys_to_ptr
 209                                                       ((uint64_t)
 210                                                        ipd_pwp_ptr_fifo_ctl.s.
 211                                                        ptr << 7),
 212                                                       CVMX_FPA_PACKET_POOL, 0);
 213                                 else
 214                                         cvmx_fpa_free(cvmx_phys_to_ptr
 215                                                       ((uint64_t)
 216                                                        ipd_pwp_ptr_fifo_ctl.s.
 217                                                        ptr << 7),
 218                                                       CVMX_FPA_WQE_POOL, 0);
 219                         }
 220                         ipd_pwp_ptr_fifo_ctl.s.cena = 1;
 221                         cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
 222                                        ipd_pwp_ptr_fifo_ctl.u64);
 223                 }
 224
 225                 /* Free the prefetched packet */
 226                 if (ipd_ptr_count.s.pktv_cnt) {
 227                         union cvmx_ipd_pkt_ptr_valid ipd_pkt_ptr_valid;
 228                         ipd_pkt_ptr_valid.u64 =
 229                             cvmx_read_csr(CVMX_IPD_PKT_PTR_VALID);
 230                         cvmx_fpa_free(cvmx_phys_to_ptr
 231                                       (ipd_pkt_ptr_valid.s.ptr << 7),
 232                                       CVMX_FPA_PACKET_POOL, 0);
 233                 }
 234
 235                 /* Free the per port prefetched packets */
 236                 if (1) {
 237                         int i;
 238                         union cvmx_ipd_prc_port_ptr_fifo_ctl
 239                             ipd_prc_port_ptr_fifo_ctl;
 240                         ipd_prc_port_ptr_fifo_ctl.u64 =
 241                             cvmx_read_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
 242
 243                         for (i = 0; i < ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
 244                              i++) {
 245                                 ipd_prc_port_ptr_fifo_ctl.s.cena = 0;
 246                                 ipd_prc_port_ptr_fifo_ctl.s.raddr =
 247                                     i % ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
 248                                 cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL,
 249                                                ipd_prc_port_ptr_fifo_ctl.u64);
 250                                 ipd_prc_port_ptr_fifo_ctl.u64 =
 251                                     cvmx_read_csr
 252                                     (CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
 253                                 cvmx_fpa_free(cvmx_phys_to_ptr
 254                                               ((uint64_t)
 255                                                ipd_prc_port_ptr_fifo_ctl.s.
 256                                                ptr << 7), CVMX_FPA_PACKET_POOL,
 257                                               0);
 258                         }
 259                         ipd_prc_port_ptr_fifo_ctl.s.cena = 1;
 260                         cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL,
 261                                        ipd_prc_port_ptr_fifo_ctl.u64);
 262                 }
 263
 264                 /* Free all packets in the holding fifo */
 265                 if (ipd_ptr_count.s.pfif_cnt) {
 266                         int i;
 267                         union cvmx_ipd_prc_hold_ptr_fifo_ctl
 268                             ipd_prc_hold_ptr_fifo_ctl;
 269
 270                         ipd_prc_hold_ptr_fifo_ctl.u64 =
 271                             cvmx_read_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
 272
 273                         for (i = 0; i < ipd_ptr_count.s.pfif_cnt; i++) {
 274                                 ipd_prc_hold_ptr_fifo_ctl.s.cena = 0;
 275                                 ipd_prc_hold_ptr_fifo_ctl.s.raddr =
 276                                     (ipd_prc_hold_ptr_fifo_ctl.s.praddr +
 277                                      i) % ipd_prc_hold_ptr_fifo_ctl.s.max_pkt;
 278                                 cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL,
 279                                                ipd_prc_hold_ptr_fifo_ctl.u64);
 280                                 ipd_prc_hold_ptr_fifo_ctl.u64 =
 281                                     cvmx_read_csr
 282                                     (CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL);
 283                                 cvmx_fpa_free(cvmx_phys_to_ptr
 284                                               ((uint64_t)
 285                                                ipd_prc_hold_ptr_fifo_ctl.s.
 286                                                ptr << 7), CVMX_FPA_PACKET_POOL,
 287                                               0);
 288                         }
 289                         ipd_prc_hold_ptr_fifo_ctl.s.cena = 1;
 290                         cvmx_write_csr(CVMX_IPD_PRC_HOLD_PTR_FIFO_CTL,
 291                                        ipd_prc_hold_ptr_fifo_ctl.u64);
 292                 }
 293
 294                 /* Free all packets in the fifo */
 295                 if (ipd_ptr_count.s.pkt_pcnt) {
 296                         int i;
 297                         union cvmx_ipd_pwp_ptr_fifo_ctl ipd_pwp_ptr_fifo_ctl;
 298                         ipd_pwp_ptr_fifo_ctl.u64 =
 299                             cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
 300
 301                         for (i = 0; i < ipd_ptr_count.s.pkt_pcnt; i++) {
 302                                 ipd_pwp_ptr_fifo_ctl.s.cena = 0;
 303                                 ipd_pwp_ptr_fifo_ctl.s.raddr =
 304                                     (ipd_pwp_ptr_fifo_ctl.s.praddr +
 305                                      i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
 306                                 cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
 307                                                ipd_pwp_ptr_fifo_ctl.u64);
 308                                 ipd_pwp_ptr_fifo_ctl.u64 =
 309                                     cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
 310                                 cvmx_fpa_free(cvmx_phys_to_ptr
 311                                               ((uint64_t) ipd_pwp_ptr_fifo_ctl.
 312                                                s.ptr << 7),
 313                                               CVMX_FPA_PACKET_POOL, 0);
 314                         }
 315                         ipd_pwp_ptr_fifo_ctl.s.cena = 1;
 316                         cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
 317                                        ipd_pwp_ptr_fifo_ctl.u64);
 318                 }
 319
 320                 /* Reset the IPD to get all buffers out of it */
 321                 {
 322                         union cvmx_ipd_ctl_status ipd_ctl_status;
 323                         ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 324                         ipd_ctl_status.s.reset = 1;
 325                         cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 326                 }
 327
 328                 /* Reset the PIP */
 329                 {
 330                         union cvmx_pip_sft_rst pip_sft_rst;
 331                         pip_sft_rst.u64 = cvmx_read_csr(CVMX_PIP_SFT_RST);
 332                         pip_sft_rst.s.rst = 1;
 333                         cvmx_write_csr(CVMX_PIP_SFT_RST, pip_sft_rst.u64);
 334                 }
 335         }
 336 }
 337
 338 #endif /*  __CVMX_IPD_H__ */