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