drivers/mempool/dpaa/dpaa_mempool.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2017 NXP
   4  *
   5  */
   6
   7 /* System headers */
   8 #include <stdio.h>
   9 #include <inttypes.h>
  10 #include <unistd.h>
  11 #include <limits.h>
  12 #include <sched.h>
  13 #include <signal.h>
  14 #include <pthread.h>
  15 #include <sys/types.h>
  16 #include <sys/syscall.h>
  17
  18 #include <rte_byteorder.h>
  19 #include <rte_common.h>
  20 #include <rte_log.h>
  21 #include <rte_debug.h>
  22 #include <rte_memory.h>
  23 #include <rte_tailq.h>
  24 #include <rte_eal.h>
  25 #include <rte_malloc.h>
  26 #include <rte_ring.h>
  27
  28 #include <dpaa_mempool.h>
  29
  30 struct dpaa_bp_info rte_dpaa_bpid_info[DPAA_MAX_BPOOLS];
  31
  32 static int
  33 dpaa_mbuf_create_pool(struct rte_mempool *mp)
  34 {
  35         struct bman_pool *bp;
  36         struct bm_buffer bufs[8];
  37         struct dpaa_bp_info *bp_info;
  38         uint8_t bpid;
  39         int num_bufs = 0, ret = 0;
  40         struct bman_pool_params params = {
  41                 .flags = BMAN_POOL_FLAG_DYNAMIC_BPID
  42         };
  43
  44         MEMPOOL_INIT_FUNC_TRACE();
  45
  46         bp = bman_new_pool(&params);
  47         if (!bp) {
  48                 DPAA_MEMPOOL_ERR("bman_new_pool() failed");
  49                 return -ENODEV;
  50         }
  51         bpid = bman_get_params(bp)->bpid;
  52
  53         /* Drain the pool of anything already in it. */
  54         do {
  55                 /* Acquire is all-or-nothing, so we drain in 8s,
  56                  * then in 1s for the remainder.
  57                  */
  58                 if (ret != 1)
  59                         ret = bman_acquire(bp, bufs, 8, 0);
  60                 if (ret < 8)
  61                         ret = bman_acquire(bp, bufs, 1, 0);
  62                 if (ret > 0)
  63                         num_bufs += ret;
  64         } while (ret > 0);
  65         if (num_bufs)
  66                 DPAA_MEMPOOL_WARN("drained %u bufs from BPID %d",
  67                                   num_bufs, bpid);
  68
  69         rte_dpaa_bpid_info[bpid].mp = mp;
  70         rte_dpaa_bpid_info[bpid].bpid = bpid;
  71         rte_dpaa_bpid_info[bpid].size = mp->elt_size;
  72         rte_dpaa_bpid_info[bpid].bp = bp;
  73         rte_dpaa_bpid_info[bpid].meta_data_size =
  74                 sizeof(struct rte_mbuf) + rte_pktmbuf_priv_size(mp);
  75         rte_dpaa_bpid_info[bpid].dpaa_ops_index = mp->ops_index;
  76
  77         bp_info = rte_malloc(NULL,
  78                              sizeof(struct dpaa_bp_info),
  79                              RTE_CACHE_LINE_SIZE);
  80         if (!bp_info) {
  81                 DPAA_MEMPOOL_WARN("Memory allocation failed for bp_info");
  82                 bman_free_pool(bp);
  83                 return -ENOMEM;
  84         }
  85
  86         rte_memcpy(bp_info, (void *)&rte_dpaa_bpid_info[bpid],
  87                    sizeof(struct dpaa_bp_info));
  88         mp->pool_data = (void *)bp_info;
  89
  90         DPAA_MEMPOOL_INFO("BMAN pool created for bpid =%d", bpid);
  91         return 0;
  92 }
  93
  94 static void
  95 dpaa_mbuf_free_pool(struct rte_mempool *mp)
  96 {
  97         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
  98
  99         MEMPOOL_INIT_FUNC_TRACE();
 100
 101         if (bp_info) {
 102                 bman_free_pool(bp_info->bp);
 103                 DPAA_MEMPOOL_INFO("BMAN pool freed for bpid =%d",
 104                                   bp_info->bpid);
 105                 rte_free(mp->pool_data);
 106                 mp->pool_data = NULL;
 107         }
 108 }
 109
 110 static void
 111 dpaa_buf_free(struct dpaa_bp_info *bp_info, uint64_t addr)
 112 {
 113         struct bm_buffer buf;
 114         int ret;
 115
 116         DPAA_MEMPOOL_DEBUG("Free 0x%lx to bpid: %d", addr, bp_info->bpid);
 117
 118         bm_buffer_set64(&buf, addr);
 119 retry:
 120         ret = bman_release(bp_info->bp, &buf, 1, 0);
 121         if (ret) {
 122                 DPAA_MEMPOOL_DEBUG("BMAN busy. Retrying...");
 123                 cpu_spin(CPU_SPIN_BACKOFF_CYCLES);
 124                 goto retry;
 125         }
 126 }
 127
 128 static int
 129 dpaa_mbuf_free_bulk(struct rte_mempool *pool,
 130                     void *const *obj_table,
 131                     unsigned int n)
 132 {
 133         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 134         int ret;
 135         unsigned int i = 0;
 136
 137         DPAA_MEMPOOL_DPDEBUG("Request to free %d buffers in bpid = %d",
 138                              n, bp_info->bpid);
 139
 140         ret = rte_dpaa_portal_init((void *)0);
 141         if (ret) {
 142                 DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 143                                  ret);
 144                 return 0;
 145         }
 146
 147         while (i < n) {
 148                 dpaa_buf_free(bp_info,
 149                               (uint64_t)rte_mempool_virt2iova(obj_table[i]) +
 150                               bp_info->meta_data_size);
 151                 i = i + 1;
 152         }
 153
 154         DPAA_MEMPOOL_DPDEBUG("freed %d buffers in bpid =%d",
 155                              n, bp_info->bpid);
 156
 157         return 0;
 158 }
 159
 160 static int
 161 dpaa_mbuf_alloc_bulk(struct rte_mempool *pool,
 162                      void **obj_table,
 163                      unsigned int count)
 164 {
 165         struct rte_mbuf **m = (struct rte_mbuf **)obj_table;
 166         struct bm_buffer bufs[DPAA_MBUF_MAX_ACQ_REL];
 167         struct dpaa_bp_info *bp_info;
 168         void *bufaddr;
 169         int i, ret;
 170         unsigned int n = 0;
 171
 172         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 173
 174         DPAA_MEMPOOL_DPDEBUG("Request to alloc %d buffers in bpid = %d",
 175                              count, bp_info->bpid);
 176
 177         if (unlikely(count >= (RTE_MEMPOOL_CACHE_MAX_SIZE * 2))) {
 178                 DPAA_MEMPOOL_ERR("Unable to allocate requested (%u) buffers",
 179                                  count);
 180                 return -1;
 181         }
 182
 183         ret = rte_dpaa_portal_init((void *)0);
 184         if (ret) {
 185                 DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 186                                  ret);
 187                 return -1;
 188         }
 189
 190         while (n < count) {
 191                 /* Acquire is all-or-nothing, so we drain in 7s,
 192                  * then the remainder.
 193                  */
 194                 if ((count - n) > DPAA_MBUF_MAX_ACQ_REL) {
 195                         ret = bman_acquire(bp_info->bp, bufs,
 196                                            DPAA_MBUF_MAX_ACQ_REL, 0);
 197                 } else {
 198                         ret = bman_acquire(bp_info->bp, bufs, count - n, 0);
 199                 }
 200                 /* In case of less than requested number of buffers available
 201                  * in pool, qbman_swp_acquire returns 0
 202                  */
 203                 if (ret <= 0) {
 204                         DPAA_MEMPOOL_DPDEBUG("Buffer acquire failed (%d)",
 205                                              ret);
 206                         /* The API expect the exact number of requested
 207                          * buffers. Releasing all buffers allocated
 208                          */
 209                         dpaa_mbuf_free_bulk(pool, obj_table, n);
 210                         return -ENOBUFS;
 211                 }
 212                 /* assigning mbuf from the acquired objects */
 213                 for (i = 0; (i < ret) && bufs[i].addr; i++) {
 214                         /* TODO-errata - objerved that bufs may be null
 215                          * i.e. first buffer is valid, remaining 6 buffers
 216                          * may be null.
 217                          */
 218                         bufaddr = (void *)rte_dpaa_mem_ptov(bufs[i].addr);
 219                         m[n] = (struct rte_mbuf *)((char *)bufaddr
 220                                                 - bp_info->meta_data_size);
 221                         DPAA_MEMPOOL_DPDEBUG("Paddr (%p), FD (%p) from BMAN",
 222                                              (void *)bufaddr, (void *)m[n]);
 223                         n++;
 224                 }
 225         }
 226
 227         DPAA_MEMPOOL_DPDEBUG("Allocated %d buffers from bpid=%d",
 228                              n, bp_info->bpid);
 229         return 0;
 230 }
 231
 232 static unsigned int
 233 dpaa_mbuf_get_count(const struct rte_mempool *mp)
 234 {
 235         struct dpaa_bp_info *bp_info;
 236
 237         MEMPOOL_INIT_FUNC_TRACE();
 238
 239         if (!mp || !mp->pool_data) {
 240                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 241                 return 0;
 242         }
 243
 244         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 245
 246         return bman_query_free_buffers(bp_info->bp);
 247 }
 248
 249 struct rte_mempool_ops dpaa_mpool_ops = {
 250         .name = "dpaa",
 251         .alloc = dpaa_mbuf_create_pool,
 252         .free = dpaa_mbuf_free_pool,
 253         .enqueue = dpaa_mbuf_free_bulk,
 254         .dequeue = dpaa_mbuf_alloc_bulk,
 255         .get_count = dpaa_mbuf_get_count,
 256 };
 257
 258 MEMPOOL_REGISTER_OPS(dpaa_mpool_ops);