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;
  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         if (rte_dpaa_bpid_info == NULL) {
  78                 rte_dpaa_bpid_info = (struct dpaa_bp_info *)rte_zmalloc(NULL,
  79                                 sizeof(struct dpaa_bp_info) * DPAA_MAX_BPOOLS,
  80                                 RTE_CACHE_LINE_SIZE);
  81                 if (rte_dpaa_bpid_info == NULL) {
  82                         bman_free_pool(bp);
  83                         return -ENOMEM;
  84                 }
  85         }
  86
  87         rte_dpaa_bpid_info[bpid].mp = mp;
  88         rte_dpaa_bpid_info[bpid].bpid = bpid;
  89         rte_dpaa_bpid_info[bpid].size = mp->elt_size;
  90         rte_dpaa_bpid_info[bpid].bp = bp;
  91         rte_dpaa_bpid_info[bpid].meta_data_size =
  92                 sizeof(struct rte_mbuf) + rte_pktmbuf_priv_size(mp);
  93         rte_dpaa_bpid_info[bpid].dpaa_ops_index = mp->ops_index;
  94         rte_dpaa_bpid_info[bpid].ptov_off = 0;
  95         rte_dpaa_bpid_info[bpid].flags = 0;
  96
  97         bp_info = rte_malloc(NULL,
  98                              sizeof(struct dpaa_bp_info),
  99                              RTE_CACHE_LINE_SIZE);
 100         if (!bp_info) {
 101                 DPAA_MEMPOOL_WARN("Memory allocation failed for bp_info");
 102                 bman_free_pool(bp);
 103                 return -ENOMEM;
 104         }
 105
 106         rte_memcpy(bp_info, (void *)&rte_dpaa_bpid_info[bpid],
 107                    sizeof(struct dpaa_bp_info));
 108         mp->pool_data = (void *)bp_info;
 109
 110         DPAA_MEMPOOL_INFO("BMAN pool created for bpid =%d", bpid);
 111         return 0;
 112 }
 113
 114 static void
 115 dpaa_mbuf_free_pool(struct rte_mempool *mp)
 116 {
 117         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 118
 119         MEMPOOL_INIT_FUNC_TRACE();
 120
 121         if (bp_info) {
 122                 bman_free_pool(bp_info->bp);
 123                 DPAA_MEMPOOL_INFO("BMAN pool freed for bpid =%d",
 124                                   bp_info->bpid);
 125                 rte_free(mp->pool_data);
 126                 mp->pool_data = NULL;
 127         }
 128 }
 129
 130 static void
 131 dpaa_buf_free(struct dpaa_bp_info *bp_info, uint64_t addr)
 132 {
 133         struct bm_buffer buf;
 134         int ret;
 135
 136         DPAA_MEMPOOL_DPDEBUG("Free 0x%" PRIx64 " to bpid: %d",
 137                            addr, bp_info->bpid);
 138
 139         bm_buffer_set64(&buf, addr);
 140 retry:
 141         ret = bman_release(bp_info->bp, &buf, 1, 0);
 142         if (ret) {
 143                 DPAA_MEMPOOL_DEBUG("BMAN busy. Retrying...");
 144                 cpu_spin(CPU_SPIN_BACKOFF_CYCLES);
 145                 goto retry;
 146         }
 147 }
 148
 149 static int
 150 dpaa_mbuf_free_bulk(struct rte_mempool *pool,
 151                     void *const *obj_table,
 152                     unsigned int n)
 153 {
 154         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 155         int ret;
 156         unsigned int i = 0;
 157
 158         DPAA_MEMPOOL_DPDEBUG("Request to free %d buffers in bpid = %d",
 159                              n, bp_info->bpid);
 160
 161         if (unlikely(!RTE_PER_LCORE(dpaa_io))) {
 162                 ret = rte_dpaa_portal_init((void *)0);
 163                 if (ret) {
 164                         DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 165                                          ret);
 166                         return 0;
 167                 }
 168         }
 169
 170         while (i < n) {
 171                 uint64_t phy = rte_mempool_virt2iova(obj_table[i]);
 172
 173                 if (unlikely(!bp_info->ptov_off)) {
 174                         /* buffers are from single mem segment */
 175                         if (bp_info->flags & DPAA_MPOOL_SINGLE_SEGMENT) {
 176                                 bp_info->ptov_off = (size_t)obj_table[i] - phy;
 177                                 rte_dpaa_bpid_info[bp_info->bpid].ptov_off
 178                                                 = bp_info->ptov_off;
 179                         }
 180                 }
 181
 182                 dpaa_buf_free(bp_info,
 183                               (uint64_t)phy + bp_info->meta_data_size);
 184                 i = i + 1;
 185         }
 186
 187         DPAA_MEMPOOL_DPDEBUG("freed %d buffers in bpid =%d",
 188                              n, bp_info->bpid);
 189
 190         return 0;
 191 }
 192
 193 static int
 194 dpaa_mbuf_alloc_bulk(struct rte_mempool *pool,
 195                      void **obj_table,
 196                      unsigned int count)
 197 {
 198         struct rte_mbuf **m = (struct rte_mbuf **)obj_table;
 199         struct bm_buffer bufs[DPAA_MBUF_MAX_ACQ_REL];
 200         struct dpaa_bp_info *bp_info;
 201         void *bufaddr;
 202         int i, ret;
 203         unsigned int n = 0;
 204
 205         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 206
 207         DPAA_MEMPOOL_DPDEBUG("Request to alloc %d buffers in bpid = %d",
 208                              count, bp_info->bpid);
 209
 210         if (unlikely(count >= (RTE_MEMPOOL_CACHE_MAX_SIZE * 2))) {
 211                 DPAA_MEMPOOL_ERR("Unable to allocate requested (%u) buffers",
 212                                  count);
 213                 return -1;
 214         }
 215
 216         if (unlikely(!RTE_PER_LCORE(dpaa_io))) {
 217                 ret = rte_dpaa_portal_init((void *)0);
 218                 if (ret) {
 219                         DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 220                                          ret);
 221                         return -1;
 222                 }
 223         }
 224
 225         while (n < count) {
 226                 /* Acquire is all-or-nothing, so we drain in 7s,
 227                  * then the remainder.
 228                  */
 229                 if ((count - n) > DPAA_MBUF_MAX_ACQ_REL) {
 230                         ret = bman_acquire(bp_info->bp, bufs,
 231                                            DPAA_MBUF_MAX_ACQ_REL, 0);
 232                 } else {
 233                         ret = bman_acquire(bp_info->bp, bufs, count - n, 0);
 234                 }
 235                 /* In case of less than requested number of buffers available
 236                  * in pool, qbman_swp_acquire returns 0
 237                  */
 238                 if (ret <= 0) {
 239                         DPAA_MEMPOOL_DPDEBUG("Buffer acquire failed (%d)",
 240                                              ret);
 241                         /* The API expect the exact number of requested
 242                          * buffers. Releasing all buffers allocated
 243                          */
 244                         dpaa_mbuf_free_bulk(pool, obj_table, n);
 245                         return -ENOBUFS;
 246                 }
 247                 /* assigning mbuf from the acquired objects */
 248                 for (i = 0; (i < ret) && bufs[i].addr; i++) {
 249                         /* TODO-errata - objerved that bufs may be null
 250                          * i.e. first buffer is valid, remaining 6 buffers
 251                          * may be null.
 252                          */
 253                         bufaddr = DPAA_MEMPOOL_PTOV(bp_info, bufs[i].addr);
 254                         m[n] = (struct rte_mbuf *)((char *)bufaddr
 255                                                 - bp_info->meta_data_size);
 256                         DPAA_MEMPOOL_DPDEBUG("Paddr (%p), FD (%p) from BMAN",
 257                                              (void *)bufaddr, (void *)m[n]);
 258                         n++;
 259                 }
 260         }
 261
 262         DPAA_MEMPOOL_DPDEBUG("Allocated %d buffers from bpid=%d",
 263                              n, bp_info->bpid);
 264         return 0;
 265 }
 266
 267 static unsigned int
 268 dpaa_mbuf_get_count(const struct rte_mempool *mp)
 269 {
 270         struct dpaa_bp_info *bp_info;
 271
 272         MEMPOOL_INIT_FUNC_TRACE();
 273
 274         if (!mp || !mp->pool_data) {
 275                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 276                 return 0;
 277         }
 278
 279         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 280
 281         return bman_query_free_buffers(bp_info->bp);
 282 }
 283
 284 static int
 285 dpaa_populate(struct rte_mempool *mp, unsigned int max_objs,
 286               void *vaddr, rte_iova_t paddr, size_t len,
 287               rte_mempool_populate_obj_cb_t *obj_cb, void *obj_cb_arg)
 288 {
 289         struct dpaa_bp_info *bp_info;
 290         unsigned int total_elt_sz;
 291
 292         MEMPOOL_INIT_FUNC_TRACE();
 293
 294         if (!mp || !mp->pool_data) {
 295                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 296                 return 0;
 297         }
 298
 299         /* Update the PA-VA Table */
 300         dpaax_iova_table_update(paddr, vaddr, len);
 301
 302         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 303         total_elt_sz = mp->header_size + mp->elt_size + mp->trailer_size;
 304
 305         DPAA_MEMPOOL_DEBUG("Req size %" PRIx64 " vs Available %u\n",
 306                            (uint64_t)len, total_elt_sz * mp->size);
 307
 308         /* Detect pool area has sufficient space for elements in this memzone */
 309         if (len >= total_elt_sz * mp->size)
 310                 bp_info->flags |= DPAA_MPOOL_SINGLE_SEGMENT;
 311         struct dpaa_memseg *ms;
 312
 313         /* For each memory chunk pinned to the Mempool, a linked list of the
 314          * contained memsegs is created for searching when PA to VA
 315          * conversion is required.
 316          */
 317         ms = rte_zmalloc(NULL, sizeof(struct dpaa_memseg), 0);
 318         if (!ms) {
 319                 DPAA_MEMPOOL_ERR("Unable to allocate internal memory.");
 320                 DPAA_MEMPOOL_WARN("Fast Physical to Virtual Addr translation would not be available.");
 321                 /* If the element is not added, it would only lead to failure
 322                  * in searching for the element and the logic would Fallback
 323                  * to traditional DPDK memseg traversal code. So, this is not
 324                  * a blocking error - but, error would be printed on screen.
 325                  */
 326                 return 0;
 327         }
 328
 329         ms->vaddr = vaddr;
 330         ms->iova = paddr;
 331         ms->len = len;
 332         /* Head insertions are generally faster than tail insertions as the
 333          * buffers pinned are picked from rear end.
 334          */
 335         TAILQ_INSERT_HEAD(&rte_dpaa_memsegs, ms, next);
 336
 337         return rte_mempool_op_populate_default(mp, max_objs, vaddr, paddr, len,
 338                                                obj_cb, obj_cb_arg);
 339 }
 340
 341 static const struct rte_mempool_ops dpaa_mpool_ops = {
 342         .name = DPAA_MEMPOOL_OPS_NAME,
 343         .alloc = dpaa_mbuf_create_pool,
 344         .free = dpaa_mbuf_free_pool,
 345         .enqueue = dpaa_mbuf_free_bulk,
 346         .dequeue = dpaa_mbuf_alloc_bulk,
 347         .get_count = dpaa_mbuf_get_count,
 348         .populate = dpaa_populate,
 349 };
 350
 351 MEMPOOL_REGISTER_OPS(dpaa_mpool_ops);