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 #include <dpaax_iova_table.h>
  30
  31 /* List of all the memseg information locally maintained in dpaa driver. This
  32  * is to optimize the PA_to_VA searches until a better mechanism (algo) is
  33  * available.
  34  */
  35 struct dpaa_memseg_list rte_dpaa_memsegs
  36         = TAILQ_HEAD_INITIALIZER(rte_dpaa_memsegs);
  37
  38 struct dpaa_bp_info rte_dpaa_bpid_info[DPAA_MAX_BPOOLS];
  39
  40 static int
  41 dpaa_mbuf_create_pool(struct rte_mempool *mp)
  42 {
  43         struct bman_pool *bp;
  44         struct bm_buffer bufs[8];
  45         struct dpaa_bp_info *bp_info;
  46         uint8_t bpid;
  47         int num_bufs = 0, ret = 0;
  48         struct bman_pool_params params = {
  49                 .flags = BMAN_POOL_FLAG_DYNAMIC_BPID
  50         };
  51
  52         MEMPOOL_INIT_FUNC_TRACE();
  53
  54         bp = bman_new_pool(&params);
  55         if (!bp) {
  56                 DPAA_MEMPOOL_ERR("bman_new_pool() failed");
  57                 return -ENODEV;
  58         }
  59         bpid = bman_get_params(bp)->bpid;
  60
  61         /* Drain the pool of anything already in it. */
  62         do {
  63                 /* Acquire is all-or-nothing, so we drain in 8s,
  64                  * then in 1s for the remainder.
  65                  */
  66                 if (ret != 1)
  67                         ret = bman_acquire(bp, bufs, 8, 0);
  68                 if (ret < 8)
  69                         ret = bman_acquire(bp, bufs, 1, 0);
  70                 if (ret > 0)
  71                         num_bufs += ret;
  72         } while (ret > 0);
  73         if (num_bufs)
  74                 DPAA_MEMPOOL_WARN("drained %u bufs from BPID %d",
  75                                   num_bufs, bpid);
  76
  77         rte_dpaa_bpid_info[bpid].mp = mp;
  78         rte_dpaa_bpid_info[bpid].bpid = bpid;
  79         rte_dpaa_bpid_info[bpid].size = mp->elt_size;
  80         rte_dpaa_bpid_info[bpid].bp = bp;
  81         rte_dpaa_bpid_info[bpid].meta_data_size =
  82                 sizeof(struct rte_mbuf) + rte_pktmbuf_priv_size(mp);
  83         rte_dpaa_bpid_info[bpid].dpaa_ops_index = mp->ops_index;
  84         rte_dpaa_bpid_info[bpid].ptov_off = 0;
  85         rte_dpaa_bpid_info[bpid].flags = 0;
  86
  87         bp_info = rte_malloc(NULL,
  88                              sizeof(struct dpaa_bp_info),
  89                              RTE_CACHE_LINE_SIZE);
  90         if (!bp_info) {
  91                 DPAA_MEMPOOL_WARN("Memory allocation failed for bp_info");
  92                 bman_free_pool(bp);
  93                 return -ENOMEM;
  94         }
  95
  96         rte_memcpy(bp_info, (void *)&rte_dpaa_bpid_info[bpid],
  97                    sizeof(struct dpaa_bp_info));
  98         mp->pool_data = (void *)bp_info;
  99
 100         DPAA_MEMPOOL_INFO("BMAN pool created for bpid =%d", bpid);
 101         return 0;
 102 }
 103
 104 static void
 105 dpaa_mbuf_free_pool(struct rte_mempool *mp)
 106 {
 107         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 108
 109         MEMPOOL_INIT_FUNC_TRACE();
 110
 111         if (bp_info) {
 112                 bman_free_pool(bp_info->bp);
 113                 DPAA_MEMPOOL_INFO("BMAN pool freed for bpid =%d",
 114                                   bp_info->bpid);
 115                 rte_free(mp->pool_data);
 116                 mp->pool_data = NULL;
 117         }
 118 }
 119
 120 static void
 121 dpaa_buf_free(struct dpaa_bp_info *bp_info, uint64_t addr)
 122 {
 123         struct bm_buffer buf;
 124         int ret;
 125
 126         DPAA_MEMPOOL_DPDEBUG("Free 0x%" PRIx64 " to bpid: %d",
 127                            addr, bp_info->bpid);
 128
 129         bm_buffer_set64(&buf, addr);
 130 retry:
 131         ret = bman_release(bp_info->bp, &buf, 1, 0);
 132         if (ret) {
 133                 DPAA_MEMPOOL_DEBUG("BMAN busy. Retrying...");
 134                 cpu_spin(CPU_SPIN_BACKOFF_CYCLES);
 135                 goto retry;
 136         }
 137 }
 138
 139 static int
 140 dpaa_mbuf_free_bulk(struct rte_mempool *pool,
 141                     void *const *obj_table,
 142                     unsigned int n)
 143 {
 144         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 145         int ret;
 146         unsigned int i = 0;
 147
 148         DPAA_MEMPOOL_DPDEBUG("Request to free %d buffers in bpid = %d",
 149                              n, bp_info->bpid);
 150
 151         if (unlikely(!RTE_PER_LCORE(dpaa_io))) {
 152                 ret = rte_dpaa_portal_init((void *)0);
 153                 if (ret) {
 154                         DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 155                                          ret);
 156                         return 0;
 157                 }
 158         }
 159
 160         while (i < n) {
 161                 uint64_t phy = rte_mempool_virt2iova(obj_table[i]);
 162
 163                 if (unlikely(!bp_info->ptov_off)) {
 164                         /* buffers are from single mem segment */
 165                         if (bp_info->flags & DPAA_MPOOL_SINGLE_SEGMENT) {
 166                                 bp_info->ptov_off = (size_t)obj_table[i] - phy;
 167                                 rte_dpaa_bpid_info[bp_info->bpid].ptov_off
 168                                                 = bp_info->ptov_off;
 169                         }
 170                 }
 171
 172                 dpaa_buf_free(bp_info,
 173                               (uint64_t)phy + bp_info->meta_data_size);
 174                 i = i + 1;
 175         }
 176
 177         DPAA_MEMPOOL_DPDEBUG("freed %d buffers in bpid =%d",
 178                              n, bp_info->bpid);
 179
 180         return 0;
 181 }
 182
 183 static int
 184 dpaa_mbuf_alloc_bulk(struct rte_mempool *pool,
 185                      void **obj_table,
 186                      unsigned int count)
 187 {
 188         struct rte_mbuf **m = (struct rte_mbuf **)obj_table;
 189         struct bm_buffer bufs[DPAA_MBUF_MAX_ACQ_REL];
 190         struct dpaa_bp_info *bp_info;
 191         void *bufaddr;
 192         int i, ret;
 193         unsigned int n = 0;
 194
 195         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 196
 197         DPAA_MEMPOOL_DPDEBUG("Request to alloc %d buffers in bpid = %d",
 198                              count, bp_info->bpid);
 199
 200         if (unlikely(count >= (RTE_MEMPOOL_CACHE_MAX_SIZE * 2))) {
 201                 DPAA_MEMPOOL_ERR("Unable to allocate requested (%u) buffers",
 202                                  count);
 203                 return -1;
 204         }
 205
 206         if (unlikely(!RTE_PER_LCORE(dpaa_io))) {
 207                 ret = rte_dpaa_portal_init((void *)0);
 208                 if (ret) {
 209                         DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 210                                          ret);
 211                         return -1;
 212                 }
 213         }
 214
 215         while (n < count) {
 216                 /* Acquire is all-or-nothing, so we drain in 7s,
 217                  * then the remainder.
 218                  */
 219                 if ((count - n) > DPAA_MBUF_MAX_ACQ_REL) {
 220                         ret = bman_acquire(bp_info->bp, bufs,
 221                                            DPAA_MBUF_MAX_ACQ_REL, 0);
 222                 } else {
 223                         ret = bman_acquire(bp_info->bp, bufs, count - n, 0);
 224                 }
 225                 /* In case of less than requested number of buffers available
 226                  * in pool, qbman_swp_acquire returns 0
 227                  */
 228                 if (ret <= 0) {
 229                         DPAA_MEMPOOL_DPDEBUG("Buffer acquire failed (%d)",
 230                                              ret);
 231                         /* The API expect the exact number of requested
 232                          * buffers. Releasing all buffers allocated
 233                          */
 234                         dpaa_mbuf_free_bulk(pool, obj_table, n);
 235                         return -ENOBUFS;
 236                 }
 237                 /* assigning mbuf from the acquired objects */
 238                 for (i = 0; (i < ret) && bufs[i].addr; i++) {
 239                         /* TODO-errata - objerved that bufs may be null
 240                          * i.e. first buffer is valid, remaining 6 buffers
 241                          * may be null.
 242                          */
 243                         bufaddr = DPAA_MEMPOOL_PTOV(bp_info, bufs[i].addr);
 244                         m[n] = (struct rte_mbuf *)((char *)bufaddr
 245                                                 - bp_info->meta_data_size);
 246                         DPAA_MEMPOOL_DPDEBUG("Paddr (%p), FD (%p) from BMAN",
 247                                              (void *)bufaddr, (void *)m[n]);
 248                         n++;
 249                 }
 250         }
 251
 252         DPAA_MEMPOOL_DPDEBUG("Allocated %d buffers from bpid=%d",
 253                              n, bp_info->bpid);
 254         return 0;
 255 }
 256
 257 static unsigned int
 258 dpaa_mbuf_get_count(const struct rte_mempool *mp)
 259 {
 260         struct dpaa_bp_info *bp_info;
 261
 262         MEMPOOL_INIT_FUNC_TRACE();
 263
 264         if (!mp || !mp->pool_data) {
 265                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 266                 return 0;
 267         }
 268
 269         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 270
 271         return bman_query_free_buffers(bp_info->bp);
 272 }
 273
 274 static int
 275 dpaa_populate(struct rte_mempool *mp, unsigned int max_objs,
 276               void *vaddr, rte_iova_t paddr, size_t len,
 277               rte_mempool_populate_obj_cb_t *obj_cb, void *obj_cb_arg)
 278 {
 279         struct dpaa_bp_info *bp_info;
 280         unsigned int total_elt_sz;
 281
 282         MEMPOOL_INIT_FUNC_TRACE();
 283
 284         if (!mp || !mp->pool_data) {
 285                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 286                 return 0;
 287         }
 288
 289         /* Update the PA-VA Table */
 290         dpaax_iova_table_update(paddr, vaddr, len);
 291
 292         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 293         total_elt_sz = mp->header_size + mp->elt_size + mp->trailer_size;
 294
 295         DPAA_MEMPOOL_DEBUG("Req size %" PRIx64 " vs Available %u\n",
 296                            (uint64_t)len, total_elt_sz * mp->size);
 297
 298         /* Detect pool area has sufficient space for elements in this memzone */
 299         if (len >= total_elt_sz * mp->size)
 300                 bp_info->flags |= DPAA_MPOOL_SINGLE_SEGMENT;
 301         struct dpaa_memseg *ms;
 302
 303         /* For each memory chunk pinned to the Mempool, a linked list of the
 304          * contained memsegs is created for searching when PA to VA
 305          * conversion is required.
 306          */
 307         ms = rte_zmalloc(NULL, sizeof(struct dpaa_memseg), 0);
 308         if (!ms) {
 309                 DPAA_MEMPOOL_ERR("Unable to allocate internal memory.");
 310                 DPAA_MEMPOOL_WARN("Fast Physical to Virtual Addr translation would not be available.");
 311                 /* If the element is not added, it would only lead to failure
 312                  * in searching for the element and the logic would Fallback
 313                  * to traditional DPDK memseg traversal code. So, this is not
 314                  * a blocking error - but, error would be printed on screen.
 315                  */
 316                 return 0;
 317         }
 318
 319         ms->vaddr = vaddr;
 320         ms->iova = paddr;
 321         ms->len = len;
 322         /* Head insertions are generally faster than tail insertions as the
 323          * buffers pinned are picked from rear end.
 324          */
 325         TAILQ_INSERT_HEAD(&rte_dpaa_memsegs, ms, next);
 326
 327         return rte_mempool_op_populate_default(mp, max_objs, vaddr, paddr, len,
 328                                                obj_cb, obj_cb_arg);
 329 }
 330
 331 static const struct rte_mempool_ops dpaa_mpool_ops = {
 332         .name = DPAA_MEMPOOL_OPS_NAME,
 333         .alloc = dpaa_mbuf_create_pool,
 334         .free = dpaa_mbuf_free_pool,
 335         .enqueue = dpaa_mbuf_free_bulk,
 336         .dequeue = dpaa_mbuf_alloc_bulk,
 337         .get_count = dpaa_mbuf_get_count,
 338         .populate = dpaa_populate,
 339 };
 340
 341 MEMPOOL_REGISTER_OPS(dpaa_mpool_ops);