11 void xp_add_xsk(struct xsk_buff_pool *pool, struct xdp_sock *xs)  in xp_add_xsk()  argument
18 	spin_lock_irqsave(&pool->xsk_tx_list_lock, flags);  in xp_add_xsk()
19 	list_add_rcu(&xs->tx_list, &pool->xsk_tx_list);  in xp_add_xsk()
20 	spin_unlock_irqrestore(&pool->xsk_tx_list_lock, flags);  in xp_add_xsk()
23 void xp_del_xsk(struct xsk_buff_pool *pool, struct xdp_sock *xs)  in xp_del_xsk()  argument
30 	spin_lock_irqsave(&pool->xsk_tx_list_lock, flags);  in xp_del_xsk()
32 	spin_unlock_irqrestore(&pool->xsk_tx_list_lock, flags);  in xp_del_xsk()
35 void xp_destroy(struct xsk_buff_pool *pool)  in xp_destroy()  argument
37 	if (!pool)  in xp_destroy()
40 	kvfree(pool->heads);  in xp_destroy()
41 	kvfree(pool);  in xp_destroy()
47 	struct xsk_buff_pool *pool;  in xp_create_and_assign_umem()  local
51 	pool = kvzalloc(struct_size(pool, free_heads, umem->chunks),  in xp_create_and_assign_umem()
53 	if (!pool)  in xp_create_and_assign_umem()
56 	pool->heads = kvcalloc(umem->chunks, sizeof(*pool->heads), GFP_KERNEL);  in xp_create_and_assign_umem()
57 	if (!pool->heads)  in xp_create_and_assign_umem()
60 	pool->chunk_mask = ~((u64)umem->chunk_size - 1);  in xp_create_and_assign_umem()
61 	pool->addrs_cnt = umem->size;  in xp_create_and_assign_umem()
62 	pool->heads_cnt = umem->chunks;  in xp_create_and_assign_umem()
63 	pool->free_heads_cnt = umem->chunks;  in xp_create_and_assign_umem()
64 	pool->headroom = umem->headroom;  in xp_create_and_assign_umem()
65 	pool->chunk_size = umem->chunk_size;  in xp_create_and_assign_umem()
66 	pool->unaligned = umem->flags & XDP_UMEM_UNALIGNED_CHUNK_FLAG;  in xp_create_and_assign_umem()
67 	pool->frame_len = umem->chunk_size - umem->headroom -  in xp_create_and_assign_umem()
69 	pool->umem = umem;  in xp_create_and_assign_umem()
70 	pool->addrs = umem->addrs;  in xp_create_and_assign_umem()
71 	INIT_LIST_HEAD(&pool->free_list);  in xp_create_and_assign_umem()
72 	INIT_LIST_HEAD(&pool->xsk_tx_list);  in xp_create_and_assign_umem()
73 	spin_lock_init(&pool->xsk_tx_list_lock);  in xp_create_and_assign_umem()
74 	spin_lock_init(&pool->cq_lock);  in xp_create_and_assign_umem()
75 	refcount_set(&pool->users, 1);  in xp_create_and_assign_umem()
77 	pool->fq = xs->fq_tmp;  in xp_create_and_assign_umem()
78 	pool->cq = xs->cq_tmp;  in xp_create_and_assign_umem()
80 	for (i = 0; i < pool->free_heads_cnt; i++) {  in xp_create_and_assign_umem()
81 		xskb = &pool->heads[i];  in xp_create_and_assign_umem()
82 		xskb->pool = pool;  in xp_create_and_assign_umem()
84 		pool->free_heads[i] = xskb;  in xp_create_and_assign_umem()
87 	return pool;  in xp_create_and_assign_umem()
90 	xp_destroy(pool);  in xp_create_and_assign_umem()
94 void xp_set_rxq_info(struct xsk_buff_pool *pool, struct xdp_rxq_info *rxq)  in xp_set_rxq_info()  argument
98 	for (i = 0; i < pool->heads_cnt; i++)  in xp_set_rxq_info()
99 		pool->heads[i].xdp.rxq = rxq;  in xp_set_rxq_info()
103 static void xp_disable_drv_zc(struct xsk_buff_pool *pool)  in xp_disable_drv_zc()  argument
110 	if (pool->umem->zc) {  in xp_disable_drv_zc()
112 		bpf.xsk.pool = NULL;  in xp_disable_drv_zc()
113 		bpf.xsk.queue_id = pool->queue_id;  in xp_disable_drv_zc()
115 		err = pool->netdev->netdev_ops->ndo_bpf(pool->netdev, &bpf);  in xp_disable_drv_zc()
122 int xp_assign_dev(struct xsk_buff_pool *pool,  in xp_assign_dev()  argument
140 	pool->netdev = netdev;  in xp_assign_dev()
141 	pool->queue_id = queue_id;  in xp_assign_dev()
142 	err = xsk_reg_pool_at_qid(netdev, pool, queue_id);  in xp_assign_dev()
147 		pool->uses_need_wakeup = true;  in xp_assign_dev()
152 	pool->cached_need_wakeup = XDP_WAKEUP_TX;  in xp_assign_dev()
167 	bpf.xsk.pool = pool;  in xp_assign_dev()
174 	if (!pool->dma_pages) {  in xp_assign_dev()
179 	pool->umem->zc = true;  in xp_assign_dev()
183 	xp_disable_drv_zc(pool);  in xp_assign_dev()
194 int xp_assign_dev_shared(struct xsk_buff_pool *pool, struct xdp_umem *umem,  in xp_assign_dev_shared()  argument
200 	if (!pool->fq || !pool->cq)  in xp_assign_dev_shared()
204 	if (pool->uses_need_wakeup)  in xp_assign_dev_shared()
207 	return xp_assign_dev(pool, dev, queue_id, flags);  in xp_assign_dev_shared()
210 void xp_clear_dev(struct xsk_buff_pool *pool)  in xp_clear_dev()  argument
212 	if (!pool->netdev)  in xp_clear_dev()
215 	xp_disable_drv_zc(pool);  in xp_clear_dev()
216 	xsk_clear_pool_at_qid(pool->netdev, pool->queue_id);  in xp_clear_dev()
217 	dev_put(pool->netdev);  in xp_clear_dev()
218 	pool->netdev = NULL;  in xp_clear_dev()
223 	struct xsk_buff_pool *pool = container_of(work, struct xsk_buff_pool,  in xp_release_deferred()  local
227 	xp_clear_dev(pool);  in xp_release_deferred()
230 	if (pool->fq) {  in xp_release_deferred()
231 		xskq_destroy(pool->fq);  in xp_release_deferred()
232 		pool->fq = NULL;  in xp_release_deferred()
235 	if (pool->cq) {  in xp_release_deferred()
236 		xskq_destroy(pool->cq);  in xp_release_deferred()
237 		pool->cq = NULL;  in xp_release_deferred()
240 	xdp_put_umem(pool->umem, false);  in xp_release_deferred()
241 	xp_destroy(pool);  in xp_release_deferred()
244 void xp_get_pool(struct xsk_buff_pool *pool)  in xp_get_pool()  argument
246 	refcount_inc(&pool->users);  in xp_get_pool()
249 bool xp_put_pool(struct xsk_buff_pool *pool)  in xp_put_pool()  argument
251 	if (!pool)  in xp_put_pool()
254 	if (refcount_dec_and_test(&pool->users)) {  in xp_put_pool()
255 		INIT_WORK(&pool->work, xp_release_deferred);  in xp_put_pool()
256 		schedule_work(&pool->work);  in xp_put_pool()
263 static struct xsk_dma_map *xp_find_dma_map(struct xsk_buff_pool *pool)  in xp_find_dma_map()  argument
267 	list_for_each_entry(dma_map, &pool->umem->xsk_dma_list, list) {  in xp_find_dma_map()
268 		if (dma_map->netdev == pool->netdev)  in xp_find_dma_map()
323 void xp_dma_unmap(struct xsk_buff_pool *pool, unsigned long attrs)  in xp_dma_unmap()  argument
327 	if (pool->dma_pages_cnt == 0)  in xp_dma_unmap()
330 	dma_map = xp_find_dma_map(pool);  in xp_dma_unmap()
340 	kvfree(pool->dma_pages);  in xp_dma_unmap()
341 	pool->dma_pages_cnt = 0;  in xp_dma_unmap()
342 	pool->dev = NULL;  in xp_dma_unmap()
358 static int xp_init_dma_info(struct xsk_buff_pool *pool, struct xsk_dma_map *dma_map)  in xp_init_dma_info()  argument
360 	pool->dma_pages = kvcalloc(dma_map->dma_pages_cnt, sizeof(*pool->dma_pages), GFP_KERNEL);  in xp_init_dma_info()
361 	if (!pool->dma_pages)  in xp_init_dma_info()
364 	pool->dev = dma_map->dev;  in xp_init_dma_info()
365 	pool->dma_pages_cnt = dma_map->dma_pages_cnt;  in xp_init_dma_info()
366 	pool->dma_need_sync = dma_map->dma_need_sync;  in xp_init_dma_info()
367 	memcpy(pool->dma_pages, dma_map->dma_pages,  in xp_init_dma_info()
368 	       pool->dma_pages_cnt * sizeof(*pool->dma_pages));  in xp_init_dma_info()
373 int xp_dma_map(struct xsk_buff_pool *pool, struct device *dev,  in xp_dma_map()  argument
381 	dma_map = xp_find_dma_map(pool);  in xp_dma_map()
383 		err = xp_init_dma_info(pool, dma_map);  in xp_dma_map()
391 	dma_map = xp_create_dma_map(dev, pool->netdev, nr_pages, pool->umem);  in xp_dma_map()
407 	if (pool->unaligned)  in xp_dma_map()
410 	err = xp_init_dma_info(pool, dma_map);  in xp_dma_map()
420 static bool xp_addr_crosses_non_contig_pg(struct xsk_buff_pool *pool,  in xp_addr_crosses_non_contig_pg()  argument
423 	return xp_desc_crosses_non_contig_pg(pool, addr, pool->chunk_size);  in xp_addr_crosses_non_contig_pg()
426 static bool xp_check_unaligned(struct xsk_buff_pool *pool, u64 *addr)  in xp_check_unaligned()  argument
429 	if (*addr >= pool->addrs_cnt ||  in xp_check_unaligned()
430 	    *addr + pool->chunk_size > pool->addrs_cnt ||  in xp_check_unaligned()
431 	    xp_addr_crosses_non_contig_pg(pool, *addr))  in xp_check_unaligned()
436 static bool xp_check_aligned(struct xsk_buff_pool *pool, u64 *addr)  in xp_check_aligned()  argument
438 	*addr = xp_aligned_extract_addr(pool, *addr);  in xp_check_aligned()
439 	return *addr < pool->addrs_cnt;  in xp_check_aligned()
442 static struct xdp_buff_xsk *__xp_alloc(struct xsk_buff_pool *pool)  in __xp_alloc()  argument
448 	if (pool->free_heads_cnt == 0)  in __xp_alloc()
451 	xskb = pool->free_heads[--pool->free_heads_cnt];  in __xp_alloc()
454 		if (!xskq_cons_peek_addr_unchecked(pool->fq, &addr)) {  in __xp_alloc()
455 			pool->fq->queue_empty_descs++;  in __xp_alloc()
460 		ok = pool->unaligned ? xp_check_unaligned(pool, &addr) :  in __xp_alloc()
461 		     xp_check_aligned(pool, &addr);  in __xp_alloc()
463 			pool->fq->invalid_descs++;  in __xp_alloc()
464 			xskq_cons_release(pool->fq);  in __xp_alloc()
469 	xskq_cons_release(pool->fq);  in __xp_alloc()
472 	xskb->xdp.data_hard_start = pool->addrs + addr + pool->headroom;  in __xp_alloc()
473 	if (pool->dma_pages_cnt) {  in __xp_alloc()
474 		xskb->frame_dma = (pool->dma_pages[addr >> PAGE_SHIFT] &  in __xp_alloc()
477 		xskb->dma = xskb->frame_dma + pool->headroom +  in __xp_alloc()
483 struct xdp_buff *xp_alloc(struct xsk_buff_pool *pool)  in xp_alloc()  argument
487 	if (!pool->free_list_cnt) {  in xp_alloc()
488 		xskb = __xp_alloc(pool);  in xp_alloc()
492 		pool->free_list_cnt--;  in xp_alloc()
493 		xskb = list_first_entry(&pool->free_list, struct xdp_buff_xsk,  in xp_alloc()
501 	if (pool->dma_need_sync) {  in xp_alloc()
502 		dma_sync_single_range_for_device(pool->dev, xskb->dma, 0,  in xp_alloc()
503 						 pool->frame_len,  in xp_alloc()
510 bool xp_can_alloc(struct xsk_buff_pool *pool, u32 count)  in xp_can_alloc()  argument
512 	if (pool->free_list_cnt >= count)  in xp_can_alloc()
514 	return xskq_cons_has_entries(pool->fq, count - pool->free_list_cnt);  in xp_can_alloc()
520 	xskb->pool->free_list_cnt++;  in xp_free()
521 	list_add(&xskb->free_list_node, &xskb->pool->free_list);  in xp_free()
525 void *xp_raw_get_data(struct xsk_buff_pool *pool, u64 addr)  in xp_raw_get_data()  argument
527 	addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;  in xp_raw_get_data()
528 	return pool->addrs + addr;  in xp_raw_get_data()
532 dma_addr_t xp_raw_get_dma(struct xsk_buff_pool *pool, u64 addr)  in xp_raw_get_dma()  argument
534 	addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;  in xp_raw_get_dma()
535 	return (pool->dma_pages[addr >> PAGE_SHIFT] &  in xp_raw_get_dma()
543 	dma_sync_single_range_for_cpu(xskb->pool->dev, xskb->dma, 0,  in xp_dma_sync_for_cpu_slow()
544 				      xskb->pool->frame_len, DMA_BIDIRECTIONAL);  in xp_dma_sync_for_cpu_slow()
548 void xp_dma_sync_for_device_slow(struct xsk_buff_pool *pool, dma_addr_t dma,  in xp_dma_sync_for_device_slow()  argument
551 	dma_sync_single_range_for_device(pool->dev, dma, 0,  in xp_dma_sync_for_device_slow()