git.oblomov.eu Git - linux-2.6/blob - drivers/staging/octeon/cvmx-helper-fpa.c

   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  * @file
  30  *
  31  * Helper functions for FPA setup.
  32  *
  33  */
  34 #include "executive-config.h"
  35 #include "cvmx-config.h"
  36 #include "cvmx.h"
  37 #include "cvmx-bootmem.h"
  38 #include "cvmx-fpa.h"
  39 #include "cvmx-helper-fpa.h"
  40
  41 /**
  42  * Allocate memory for and initialize a single FPA pool.
  43  *
  44  * @pool:    Pool to initialize
  45  * @buffer_size:  Size of buffers to allocate in bytes
  46  * @buffers: Number of buffers to put in the pool. Zero is allowed
  47  * @name:    String name of the pool for debugging purposes
  48  * Returns Zero on success, non-zero on failure
  49  */
  50 static int __cvmx_helper_initialize_fpa_pool(int pool, uint64_t buffer_size,
  51                                              uint64_t buffers, const char *name)
  52 {
  53         uint64_t current_num;
  54         void *memory;
  55         uint64_t align = CVMX_CACHE_LINE_SIZE;
  56
  57         /*
  58          * Align the allocation so that power of 2 size buffers are
  59          * naturally aligned.
  60          */
  61         while (align < buffer_size)
  62                 align = align << 1;
  63
  64         if (buffers == 0)
  65                 return 0;
  66
  67         current_num = cvmx_read_csr(CVMX_FPA_QUEX_AVAILABLE(pool));
  68         if (current_num) {
  69                 cvmx_dprintf("Fpa pool %d(%s) already has %llu buffers. "
  70                              "Skipping setup.\n",
  71                      pool, name, (unsigned long long)current_num);
  72                 return 0;
  73         }
  74
  75         memory = cvmx_bootmem_alloc(buffer_size * buffers, align);
  76         if (memory == NULL) {
  77                 cvmx_dprintf("Out of memory initializing fpa pool %d(%s).\n",
  78                              pool, name);
  79                 return -1;
  80         }
  81         cvmx_fpa_setup_pool(pool, name, memory, buffer_size, buffers);
  82         return 0;
  83 }
  84
  85 /**
  86  * Allocate memory and initialize the FPA pools using memory
  87  * from cvmx-bootmem. Specifying zero for the number of
  88  * buffers will cause that FPA pool to not be setup. This is
  89  * useful if you aren't using some of the hardware and want
  90  * to save memory. Use cvmx_helper_initialize_fpa instead of
  91  * this function directly.
  92  *
  93  * @pip_pool: Should always be CVMX_FPA_PACKET_POOL
  94  * @pip_size: Should always be CVMX_FPA_PACKET_POOL_SIZE
  95  * @pip_buffers:
  96  *                 Number of packet buffers.
  97  * @wqe_pool: Should always be CVMX_FPA_WQE_POOL
  98  * @wqe_size: Should always be CVMX_FPA_WQE_POOL_SIZE
  99  * @wqe_entries:
 100  *                 Number of work queue entries
 101  * @pko_pool: Should always be CVMX_FPA_OUTPUT_BUFFER_POOL
 102  * @pko_size: Should always be CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE
 103  * @pko_buffers:
 104  *                 PKO Command buffers. You should at minimum have two per
 105  *                 each PKO queue.
 106  * @tim_pool: Should always be CVMX_FPA_TIMER_POOL
 107  * @tim_size: Should always be CVMX_FPA_TIMER_POOL_SIZE
 108  * @tim_buffers:
 109  *                 TIM ring buffer command queues. At least two per timer bucket
 110  *                 is recommened.
 111  * @dfa_pool: Should always be CVMX_FPA_DFA_POOL
 112  * @dfa_size: Should always be CVMX_FPA_DFA_POOL_SIZE
 113  * @dfa_buffers:
 114  *                 DFA command buffer. A relatively small (32 for example)
 115  *                 number should work.
 116  * Returns Zero on success, non-zero if out of memory
 117  */
 118 static int __cvmx_helper_initialize_fpa(int pip_pool, int pip_size,
 119                                         int pip_buffers, int wqe_pool,
 120                                         int wqe_size, int wqe_entries,
 121                                         int pko_pool, int pko_size,
 122                                         int pko_buffers, int tim_pool,
 123                                         int tim_size, int tim_buffers,
 124                                         int dfa_pool, int dfa_size,
 125                                         int dfa_buffers)
 126 {
 127         int status;
 128
 129         cvmx_fpa_enable();
 130
 131         if ((pip_buffers > 0) && (pip_buffers <= 64))
 132                 cvmx_dprintf
 133                     ("Warning: %d packet buffers may not be enough for hardware"
 134                      " prefetch. 65 or more is recommended.\n", pip_buffers);
 135
 136         if (pip_pool >= 0) {
 137                 status =
 138                     __cvmx_helper_initialize_fpa_pool(pip_pool, pip_size,
 139                                                       pip_buffers,
 140                                                       "Packet Buffers");
 141                 if (status)
 142                         return status;
 143         }
 144
 145         if (wqe_pool >= 0) {
 146                 status =
 147                     __cvmx_helper_initialize_fpa_pool(wqe_pool, wqe_size,
 148                                                       wqe_entries,
 149                                                       "Work Queue Entries");
 150                 if (status)
 151                         return status;
 152         }
 153
 154         if (pko_pool >= 0) {
 155                 status =
 156                     __cvmx_helper_initialize_fpa_pool(pko_pool, pko_size,
 157                                                       pko_buffers,
 158                                                       "PKO Command Buffers");
 159                 if (status)
 160                         return status;
 161         }
 162
 163         if (tim_pool >= 0) {
 164                 status =
 165                     __cvmx_helper_initialize_fpa_pool(tim_pool, tim_size,
 166                                                       tim_buffers,
 167                                                       "TIM Command Buffers");
 168                 if (status)
 169                         return status;
 170         }
 171
 172         if (dfa_pool >= 0) {
 173                 status =
 174                     __cvmx_helper_initialize_fpa_pool(dfa_pool, dfa_size,
 175                                                       dfa_buffers,
 176                                                       "DFA Command Buffers");
 177                 if (status)
 178                         return status;
 179         }
 180
 181         return 0;
 182 }
 183
 184 /**
 185  * Allocate memory and initialize the FPA pools using memory
 186  * from cvmx-bootmem. Sizes of each element in the pools is
 187  * controlled by the cvmx-config.h header file. Specifying
 188  * zero for any parameter will cause that FPA pool to not be
 189  * setup. This is useful if you aren't using some of the
 190  * hardware and want to save memory.
 191  *
 192  * @packet_buffers:
 193  *               Number of packet buffers to allocate
 194  * @work_queue_entries:
 195  *               Number of work queue entries
 196  * @pko_buffers:
 197  *               PKO Command buffers. You should at minimum have two per
 198  *               each PKO queue.
 199  * @tim_buffers:
 200  *               TIM ring buffer command queues. At least two per timer bucket
 201  *               is recommened.
 202  * @dfa_buffers:
 203  *               DFA command buffer. A relatively small (32 for example)
 204  *               number should work.
 205  * Returns Zero on success, non-zero if out of memory
 206  */
 207 int cvmx_helper_initialize_fpa(int packet_buffers, int work_queue_entries,
 208                                int pko_buffers, int tim_buffers,
 209                                int dfa_buffers)
 210 {
 211 #ifndef CVMX_FPA_PACKET_POOL
 212 #define CVMX_FPA_PACKET_POOL -1
 213 #define CVMX_FPA_PACKET_POOL_SIZE 0
 214 #endif
 215 #ifndef CVMX_FPA_WQE_POOL
 216 #define CVMX_FPA_WQE_POOL -1
 217 #define CVMX_FPA_WQE_POOL_SIZE 0
 218 #endif
 219 #ifndef CVMX_FPA_OUTPUT_BUFFER_POOL
 220 #define CVMX_FPA_OUTPUT_BUFFER_POOL -1
 221 #define CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE 0
 222 #endif
 223 #ifndef CVMX_FPA_TIMER_POOL
 224 #define CVMX_FPA_TIMER_POOL -1
 225 #define CVMX_FPA_TIMER_POOL_SIZE 0
 226 #endif
 227 #ifndef CVMX_FPA_DFA_POOL
 228 #define CVMX_FPA_DFA_POOL -1
 229 #define CVMX_FPA_DFA_POOL_SIZE 0
 230 #endif
 231         return __cvmx_helper_initialize_fpa(CVMX_FPA_PACKET_POOL,
 232                                             CVMX_FPA_PACKET_POOL_SIZE,
 233                                             packet_buffers, CVMX_FPA_WQE_POOL,
 234                                             CVMX_FPA_WQE_POOL_SIZE,
 235                                             work_queue_entries,
 236                                             CVMX_FPA_OUTPUT_BUFFER_POOL,
 237                                             CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE,
 238                                             pko_buffers, CVMX_FPA_TIMER_POOL,
 239                                             CVMX_FPA_TIMER_POOL_SIZE,
 240                                             tim_buffers, CVMX_FPA_DFA_POOL,
 241                                             CVMX_FPA_DFA_POOL_SIZE,
 242                                             dfa_buffers);
 243 }