b05fb7b9dcaa617c790ddf82eff4d0ec27ab4464
[dpdk.git] / 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 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);