drivers/staging/octeon/cvmx-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  * Support library for the hardware Free Pool Allocator.
  32  *
  33  *
  34  */
  35
  36 #include "cvmx-config.h"
  37 #include "cvmx.h"
  38 #include "cvmx-fpa.h"
  39 #include "cvmx-ipd.h"
  40
  41 /**
  42  * Current state of all the pools. Use access functions
  43  * instead of using it directly.
  44  */
  45 CVMX_SHARED cvmx_fpa_pool_info_t cvmx_fpa_pool_info[CVMX_FPA_NUM_POOLS];
  46
  47 /**
  48  * Setup a FPA pool to control a new block of memory. The
  49  * buffer pointer must be a physical address.
  50  *
  51  * @pool:       Pool to initialize
  52  *                   0 <= pool < 8
  53  * @name:       Constant character string to name this pool.
  54  *                   String is not copied.
  55  * @buffer:     Pointer to the block of memory to use. This must be
  56  *                   accessible by all processors and external hardware.
  57  * @block_size: Size for each block controlled by the FPA
  58  * @num_blocks: Number of blocks
  59  *
  60  * Returns 0 on Success,
  61  *         -1 on failure
  62  */
  63 int cvmx_fpa_setup_pool(uint64_t pool, const char *name, void *buffer,
  64                         uint64_t block_size, uint64_t num_blocks)
  65 {
  66         char *ptr;
  67         if (!buffer) {
  68                 cvmx_dprintf
  69                     ("ERROR: cvmx_fpa_setup_pool: NULL buffer pointer!\n");
  70                 return -1;
  71         }
  72         if (pool >= CVMX_FPA_NUM_POOLS) {
  73                 cvmx_dprintf("ERROR: cvmx_fpa_setup_pool: Illegal pool!\n");
  74                 return -1;
  75         }
  76
  77         if (block_size < CVMX_FPA_MIN_BLOCK_SIZE) {
  78                 cvmx_dprintf
  79                     ("ERROR: cvmx_fpa_setup_pool: Block size too small.\n");
  80                 return -1;
  81         }
  82
  83         if (((unsigned long)buffer & (CVMX_FPA_ALIGNMENT - 1)) != 0) {
  84                 cvmx_dprintf
  85                     ("ERROR: cvmx_fpa_setup_pool: Buffer not aligned properly.\n");
  86                 return -1;
  87         }
  88
  89         cvmx_fpa_pool_info[pool].name = name;
  90         cvmx_fpa_pool_info[pool].size = block_size;
  91         cvmx_fpa_pool_info[pool].starting_element_count = num_blocks;
  92         cvmx_fpa_pool_info[pool].base = buffer;
  93
  94         ptr = (char *)buffer;
  95         while (num_blocks--) {
  96                 cvmx_fpa_free(ptr, pool, 0);
  97                 ptr += block_size;
  98         }
  99         return 0;
 100 }
 101
 102 /**
 103  * Shutdown a Memory pool and validate that it had all of
 104  * the buffers originally placed in it.
 105  *
 106  * @pool:   Pool to shutdown
 107  * Returns Zero on success
 108  *         - Positive is count of missing buffers
 109  *         - Negative is too many buffers or corrupted pointers
 110  */
 111 uint64_t cvmx_fpa_shutdown_pool(uint64_t pool)
 112 {
 113         uint64_t errors = 0;
 114         uint64_t count = 0;
 115         uint64_t base = cvmx_ptr_to_phys(cvmx_fpa_pool_info[pool].base);
 116         uint64_t finish =
 117             base +
 118             cvmx_fpa_pool_info[pool].size *
 119             cvmx_fpa_pool_info[pool].starting_element_count;
 120         void *ptr;
 121         uint64_t address;
 122
 123         count = 0;
 124         do {
 125                 ptr = cvmx_fpa_alloc(pool);
 126                 if (ptr)
 127                         address = cvmx_ptr_to_phys(ptr);
 128                 else
 129                         address = 0;
 130                 if (address) {
 131                         if ((address >= base) && (address < finish) &&
 132                             (((address -
 133                                base) % cvmx_fpa_pool_info[pool].size) == 0)) {
 134                                 count++;
 135                         } else {
 136                                 cvmx_dprintf
 137                                     ("ERROR: cvmx_fpa_shutdown_pool: Illegal address 0x%llx in pool %s(%d)\n",
 138                                      (unsigned long long)address,
 139                                      cvmx_fpa_pool_info[pool].name, (int)pool);
 140                                 errors++;
 141                         }
 142                 }
 143         } while (address);
 144
 145 #ifdef CVMX_ENABLE_PKO_FUNCTIONS
 146         if (pool == 0)
 147                 cvmx_ipd_free_ptr();
 148 #endif
 149
 150         if (errors) {
 151                 cvmx_dprintf
 152                     ("ERROR: cvmx_fpa_shutdown_pool: Pool %s(%d) started at 0x%llx, ended at 0x%llx, with a step of 0x%llx\n",
 153                      cvmx_fpa_pool_info[pool].name, (int)pool,
 154                      (unsigned long long)base, (unsigned long long)finish,
 155                      (unsigned long long)cvmx_fpa_pool_info[pool].size);
 156                 return -errors;
 157         } else
 158                 return 0;
 159 }
 160
 161 uint64_t cvmx_fpa_get_block_size(uint64_t pool)
 162 {
 163         switch (pool) {
 164         case 0:
 165                 return CVMX_FPA_POOL_0_SIZE;
 166         case 1:
 167                 return CVMX_FPA_POOL_1_SIZE;
 168         case 2:
 169                 return CVMX_FPA_POOL_2_SIZE;
 170         case 3:
 171                 return CVMX_FPA_POOL_3_SIZE;
 172         case 4:
 173                 return CVMX_FPA_POOL_4_SIZE;
 174         case 5:
 175                 return CVMX_FPA_POOL_5_SIZE;
 176         case 6:
 177                 return CVMX_FPA_POOL_6_SIZE;
 178         case 7:
 179                 return CVMX_FPA_POOL_7_SIZE;
 180         default:
 181                 return 0;
 182         }
 183 }