Lines Matching refs:pool
11 void xp_add_xsk(struct xsk_buff_pool *pool, struct xdp_sock *xs)
18 spin_lock_irqsave(&pool->xsk_tx_list_lock, flags);
19 list_add_rcu(&xs->tx_list, &pool->xsk_tx_list);
20 spin_unlock_irqrestore(&pool->xsk_tx_list_lock, flags);
23 void xp_del_xsk(struct xsk_buff_pool *pool, struct xdp_sock *xs)
30 spin_lock_irqsave(&pool->xsk_tx_list_lock, flags);
32 spin_unlock_irqrestore(&pool->xsk_tx_list_lock, flags);
35 void xp_destroy(struct xsk_buff_pool *pool)
37 if (!pool)
40 kvfree(pool->heads);
41 kvfree(pool);
47 struct xsk_buff_pool *pool;
51 pool = kvzalloc(struct_size(pool, free_heads, umem->chunks),
53 if (!pool)
56 pool->heads = kvcalloc(umem->chunks, sizeof(*pool->heads), GFP_KERNEL);
57 if (!pool->heads)
60 pool->chunk_mask = ~((u64)umem->chunk_size - 1);
61 pool->addrs_cnt = umem->size;
62 pool->heads_cnt = umem->chunks;
63 pool->free_heads_cnt = umem->chunks;
64 pool->headroom = umem->headroom;
65 pool->chunk_size = umem->chunk_size;
66 pool->unaligned = umem->flags & XDP_UMEM_UNALIGNED_CHUNK_FLAG;
67 pool->frame_len = umem->chunk_size - umem->headroom -
69 pool->umem = umem;
70 pool->addrs = umem->addrs;
71 INIT_LIST_HEAD(&pool->free_list);
72 INIT_LIST_HEAD(&pool->xsk_tx_list);
73 spin_lock_init(&pool->xsk_tx_list_lock);
74 spin_lock_init(&pool->cq_lock);
75 refcount_set(&pool->users, 1);
77 pool->fq = xs->fq_tmp;
78 pool->cq = xs->cq_tmp;
80 for (i = 0; i < pool->free_heads_cnt; i++) {
81 xskb = &pool->heads[i];
82 xskb->pool = pool;
84 pool->free_heads[i] = xskb;
87 return pool;
90 xp_destroy(pool);
94 void xp_set_rxq_info(struct xsk_buff_pool *pool, struct xdp_rxq_info *rxq)
98 for (i = 0; i < pool->heads_cnt; i++)
99 pool->heads[i].xdp.rxq = rxq;
103 static void xp_disable_drv_zc(struct xsk_buff_pool *pool)
110 if (pool->umem->zc) {
112 bpf.xsk.pool = NULL;
113 bpf.xsk.queue_id = pool->queue_id;
115 err = pool->netdev->netdev_ops->ndo_bpf(pool->netdev, &bpf);
122 static int __xp_assign_dev(struct xsk_buff_pool *pool,
140 pool->netdev = netdev;
141 pool->queue_id = queue_id;
142 err = xsk_reg_pool_at_qid(netdev, pool, queue_id);
147 pool->uses_need_wakeup = true;
152 pool->cached_need_wakeup = XDP_WAKEUP_TX;
168 bpf.xsk.pool = pool;
175 if (!pool->dma_pages) {
180 pool->umem->zc = true;
184 xp_disable_drv_zc(pool);
195 int xp_assign_dev(struct xsk_buff_pool *pool, struct net_device *dev,
198 return __xp_assign_dev(pool, dev, queue_id, flags);
201 int xp_assign_dev_shared(struct xsk_buff_pool *pool, struct xdp_sock *umem_xs,
208 if (!pool->fq || !pool->cq)
212 if (umem_xs->pool->uses_need_wakeup)
215 return __xp_assign_dev(pool, dev, queue_id, flags);
218 void xp_clear_dev(struct xsk_buff_pool *pool)
220 if (!pool->netdev)
223 xp_disable_drv_zc(pool);
224 xsk_clear_pool_at_qid(pool->netdev, pool->queue_id);
225 dev_put(pool->netdev);
226 pool->netdev = NULL;
231 struct xsk_buff_pool *pool = container_of(work, struct xsk_buff_pool,
235 xp_clear_dev(pool);
238 if (pool->fq) {
239 xskq_destroy(pool->fq);
240 pool->fq = NULL;
243 if (pool->cq) {
244 xskq_destroy(pool->cq);
245 pool->cq = NULL;
248 xdp_put_umem(pool->umem, false);
249 xp_destroy(pool);
252 void xp_get_pool(struct xsk_buff_pool *pool)
254 refcount_inc(&pool->users);
257 bool xp_put_pool(struct xsk_buff_pool *pool)
259 if (!pool)
262 if (refcount_dec_and_test(&pool->users)) {
263 INIT_WORK(&pool->work, xp_release_deferred);
264 schedule_work(&pool->work);
271 static struct xsk_dma_map *xp_find_dma_map(struct xsk_buff_pool *pool)
275 list_for_each_entry(dma_map, &pool->umem->xsk_dma_list, list) {
276 if (dma_map->netdev == pool->netdev)
332 void xp_dma_unmap(struct xsk_buff_pool *pool, unsigned long attrs)
336 if (pool->dma_pages_cnt == 0)
339 dma_map = xp_find_dma_map(pool);
349 kvfree(pool->dma_pages);
350 pool->dma_pages_cnt = 0;
351 pool->dev = NULL;
367 static int xp_init_dma_info(struct xsk_buff_pool *pool, struct xsk_dma_map *dma_map)
369 pool->dma_pages = kvcalloc(dma_map->dma_pages_cnt, sizeof(*pool->dma_pages), GFP_KERNEL);
370 if (!pool->dma_pages)
373 pool->dev = dma_map->dev;
374 pool->dma_pages_cnt = dma_map->dma_pages_cnt;
375 pool->dma_need_sync = dma_map->dma_need_sync;
376 memcpy(pool->dma_pages, dma_map->dma_pages,
377 pool->dma_pages_cnt * sizeof(*pool->dma_pages));
382 int xp_dma_map(struct xsk_buff_pool *pool, struct device *dev,
390 dma_map = xp_find_dma_map(pool);
392 err = xp_init_dma_info(pool, dma_map);
400 dma_map = xp_create_dma_map(dev, pool->netdev, nr_pages, pool->umem);
416 if (pool->unaligned)
419 err = xp_init_dma_info(pool, dma_map);
429 static bool xp_addr_crosses_non_contig_pg(struct xsk_buff_pool *pool,
432 return xp_desc_crosses_non_contig_pg(pool, addr, pool->chunk_size);
435 static bool xp_check_unaligned(struct xsk_buff_pool *pool, u64 *addr)
438 if (*addr >= pool->addrs_cnt ||
439 *addr + pool->chunk_size > pool->addrs_cnt ||
440 xp_addr_crosses_non_contig_pg(pool, *addr))
445 static bool xp_check_aligned(struct xsk_buff_pool *pool, u64 *addr)
447 *addr = xp_aligned_extract_addr(pool, *addr);
448 return *addr < pool->addrs_cnt;
451 static struct xdp_buff_xsk *__xp_alloc(struct xsk_buff_pool *pool)
457 if (pool->free_heads_cnt == 0)
460 xskb = pool->free_heads[--pool->free_heads_cnt];
463 if (!xskq_cons_peek_addr_unchecked(pool->fq, &addr)) {
464 pool->fq->queue_empty_descs++;
469 ok = pool->unaligned ? xp_check_unaligned(pool, &addr) :
470 xp_check_aligned(pool, &addr);
472 pool->fq->invalid_descs++;
473 xskq_cons_release(pool->fq);
478 xskq_cons_release(pool->fq);
481 xskb->xdp.data_hard_start = pool->addrs + addr + pool->headroom;
482 if (pool->dma_pages_cnt) {
483 xskb->frame_dma = (pool->dma_pages[addr >> PAGE_SHIFT] &
486 xskb->dma = xskb->frame_dma + pool->headroom +
492 struct xdp_buff *xp_alloc(struct xsk_buff_pool *pool)
496 if (!pool->free_list_cnt) {
497 xskb = __xp_alloc(pool);
501 pool->free_list_cnt--;
502 xskb = list_first_entry(&pool->free_list, struct xdp_buff_xsk,
510 if (pool->dma_need_sync) {
511 dma_sync_single_range_for_device(pool->dev, xskb->dma, 0,
512 pool->frame_len,
519 bool xp_can_alloc(struct xsk_buff_pool *pool, u32 count)
521 if (pool->free_list_cnt >= count)
523 return xskq_cons_has_entries(pool->fq, count - pool->free_list_cnt);
529 xskb->pool->free_list_cnt++;
530 list_add(&xskb->free_list_node, &xskb->pool->free_list);
534 void *xp_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
536 addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;
537 return pool->addrs + addr;
541 dma_addr_t xp_raw_get_dma(struct xsk_buff_pool *pool, u64 addr)
543 addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;
544 return (pool->dma_pages[addr >> PAGE_SHIFT] &
552 dma_sync_single_range_for_cpu(xskb->pool->dev, xskb->dma, 0,
553 xskb->pool->frame_len, DMA_BIDIRECTIONAL);
557 void xp_dma_sync_for_device_slow(struct xsk_buff_pool *pool, dma_addr_t dma,
560 dma_sync_single_range_for_device(pool->dev, dma, 0,