#include <linux/dma-mapping.h>
#include <net/page_pool/types.h>
+#include <net/net_debug.h>
+#include <net/netmem.h>
#ifdef CONFIG_PAGE_POOL_STATS
/* Deprecated driver-facing API, use netlink instead */
return pool->p.dma_dir;
}
+static inline void page_pool_fragment_netmem(netmem_ref netmem, long nr)
+{
+ atomic_long_set(&netmem_to_page(netmem)->pp_ref_count, nr);
+}
+
/**
* page_pool_fragment_page() - split a fresh page into fragments
* @page: page to split
*/
static inline void page_pool_fragment_page(struct page *page, long nr)
{
- atomic_long_set(&page->pp_ref_count, nr);
+ page_pool_fragment_netmem(page_to_netmem(page), nr);
}
-static inline long page_pool_unref_page(struct page *page, long nr)
+static inline long page_pool_unref_netmem(netmem_ref netmem, long nr)
{
+ struct page *page = netmem_to_page(netmem);
long ret;
/* If nr == pp_ref_count then we have cleared all remaining
return ret;
}
+static inline long page_pool_unref_page(struct page *page, long nr)
+{
+ return page_pool_unref_netmem(page_to_netmem(page), nr);
+}
+
+static inline void page_pool_ref_netmem(netmem_ref netmem)
+{
+ atomic_long_inc(&netmem_to_page(netmem)->pp_ref_count);
+}
+
static inline void page_pool_ref_page(struct page *page)
{
- atomic_long_inc(&page->pp_ref_count);
+ page_pool_ref_netmem(page_to_netmem(page));
}
-static inline bool page_pool_is_last_ref(struct page *page)
+static inline bool page_pool_is_last_ref(netmem_ref netmem)
{
/* If page_pool_unref_page() returns 0, we were the last user */
- return page_pool_unref_page(page, 1) == 0;
+ return page_pool_unref_netmem(netmem, 1) == 0;
+}
+
+static inline void page_pool_put_netmem(struct page_pool *pool,
+ netmem_ref netmem,
+ unsigned int dma_sync_size,
+ bool allow_direct)
+{
+ /* When page_pool isn't compiled-in, net/core/xdp.c doesn't
+ * allow registering MEM_TYPE_PAGE_POOL, but shield linker.
+ */
+#ifdef CONFIG_PAGE_POOL
+ if (!page_pool_is_last_ref(netmem))
+ return;
+
+ page_pool_put_unrefed_netmem(pool, netmem, dma_sync_size, allow_direct);
+#endif
}
/**
unsigned int dma_sync_size,
bool allow_direct)
{
- /* When page_pool isn't compiled-in, net/core/xdp.c doesn't
- * allow registering MEM_TYPE_PAGE_POOL, but shield linker.
- */
-#ifdef CONFIG_PAGE_POOL
- if (!page_pool_is_last_ref(page))
- return;
+ page_pool_put_netmem(pool, page_to_netmem(page), dma_sync_size,
+ allow_direct);
+}
- page_pool_put_unrefed_page(pool, page, dma_sync_size, allow_direct);
-#endif
+static inline void page_pool_put_full_netmem(struct page_pool *pool,
+ netmem_ref netmem,
+ bool allow_direct)
+{
+ page_pool_put_netmem(pool, netmem, -1, allow_direct);
}
/**
static inline void page_pool_put_full_page(struct page_pool *pool,
struct page *page, bool allow_direct)
{
- page_pool_put_page(pool, page, -1, allow_direct);
+ page_pool_put_netmem(pool, page_to_netmem(page), -1, allow_direct);
}
/**
page_pool_put_page(pool, virt_to_head_page(va), -1, allow_direct);
}
+static inline dma_addr_t page_pool_get_dma_addr_netmem(netmem_ref netmem)
+{
+ struct page *page = netmem_to_page(netmem);
+
+ dma_addr_t ret = page->dma_addr;
+
+ if (PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA)
+ ret <<= PAGE_SHIFT;
+
+ return ret;
+}
+
/**
* page_pool_get_dma_addr() - Retrieve the stored DMA address.
* @page: page allocated from a page pool
*/
static inline dma_addr_t page_pool_get_dma_addr(const struct page *page)
{
- dma_addr_t ret = page->dma_addr;
-
- if (PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA)
- ret <<= PAGE_SHIFT;
-
- return ret;
+ return page_pool_get_dma_addr_netmem(page_to_netmem((struct page *)page));
}
-static inline bool page_pool_set_dma_addr(struct page *page, dma_addr_t addr)
+static inline bool page_pool_set_dma_addr_netmem(netmem_ref netmem,
+ dma_addr_t addr)
{
+ struct page *page = netmem_to_page(netmem);
+
if (PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA) {
page->dma_addr = addr >> PAGE_SHIFT;
page_pool_get_dma_dir(pool));
}
+static inline bool page_pool_set_dma_addr(struct page *page, dma_addr_t addr)
+{
+ return page_pool_set_dma_addr_netmem(page_to_netmem(page), addr);
+}
+
static inline bool page_pool_put(struct page_pool *pool)
{
return refcount_dec_and_test(&pool->user_cnt);
}
EXPORT_SYMBOL(page_pool_create);
-static void page_pool_return_page(struct page_pool *pool, struct page *page);
+static void page_pool_return_page(struct page_pool *pool, netmem_ref netmem);
-noinline
-static struct page *page_pool_refill_alloc_cache(struct page_pool *pool)
+static noinline netmem_ref page_pool_refill_alloc_cache(struct page_pool *pool)
{
struct ptr_ring *r = &pool->ring;
- struct page *page;
+ netmem_ref netmem;
int pref_nid; /* preferred NUMA node */
/* Quicker fallback, avoid locks when ring is empty */
if (__ptr_ring_empty(r)) {
alloc_stat_inc(pool, empty);
- return NULL;
+ return 0;
}
/* Softirq guarantee CPU and thus NUMA node is stable. This,
/* Refill alloc array, but only if NUMA match */
do {
- page = __ptr_ring_consume(r);
- if (unlikely(!page))
+ netmem = (__force netmem_ref)__ptr_ring_consume(r);
+ if (unlikely(!netmem))
break;
- if (likely(page_to_nid(page) == pref_nid)) {
- pool->alloc.cache[pool->alloc.count++] = page;
+ if (likely(page_to_nid(netmem_to_page(netmem)) == pref_nid)) {
+ pool->alloc.cache[pool->alloc.count++] = netmem;
} else {
/* NUMA mismatch;
* (1) release 1 page to page-allocator and
* (2) break out to fallthrough to alloc_pages_node.
* This limit stress on page buddy alloactor.
*/
- page_pool_return_page(pool, page);
+ page_pool_return_page(pool, netmem);
alloc_stat_inc(pool, waive);
- page = NULL;
+ netmem = 0;
break;
}
} while (pool->alloc.count < PP_ALLOC_CACHE_REFILL);
/* Return last page */
if (likely(pool->alloc.count > 0)) {
- page = pool->alloc.cache[--pool->alloc.count];
+ netmem = pool->alloc.cache[--pool->alloc.count];
alloc_stat_inc(pool, refill);
}
- return page;
+ return netmem;
}
/* fast path */
-static struct page *__page_pool_get_cached(struct page_pool *pool)
+static netmem_ref __page_pool_get_cached(struct page_pool *pool)
{
- struct page *page;
+ netmem_ref netmem;
/* Caller MUST guarantee safe non-concurrent access, e.g. softirq */
if (likely(pool->alloc.count)) {
/* Fast-path */
- page = pool->alloc.cache[--pool->alloc.count];
+ netmem = pool->alloc.cache[--pool->alloc.count];
alloc_stat_inc(pool, fast);
} else {
- page = page_pool_refill_alloc_cache(pool);
+ netmem = page_pool_refill_alloc_cache(pool);
}
- return page;
+ return netmem;
}
static void __page_pool_dma_sync_for_device(const struct page_pool *pool,
- const struct page *page,
+ netmem_ref netmem,
u32 dma_sync_size)
{
#if defined(CONFIG_HAS_DMA) && defined(CONFIG_DMA_NEED_SYNC)
- dma_addr_t dma_addr = page_pool_get_dma_addr(page);
+ dma_addr_t dma_addr = page_pool_get_dma_addr_netmem(netmem);
dma_sync_size = min(dma_sync_size, pool->p.max_len);
__dma_sync_single_for_device(pool->p.dev, dma_addr + pool->p.offset,
static __always_inline void
page_pool_dma_sync_for_device(const struct page_pool *pool,
- const struct page *page,
+ netmem_ref netmem,
u32 dma_sync_size)
{
if (pool->dma_sync && dma_dev_need_sync(pool->p.dev))
- __page_pool_dma_sync_for_device(pool, page, dma_sync_size);
+ __page_pool_dma_sync_for_device(pool, netmem, dma_sync_size);
}
-static bool page_pool_dma_map(struct page_pool *pool, struct page *page)
+static bool page_pool_dma_map(struct page_pool *pool, netmem_ref netmem)
{
dma_addr_t dma;
* into page private data (i.e 32bit cpu with 64bit DMA caps)
* This mapping is kept for lifetime of page, until leaving pool.
*/
- dma = dma_map_page_attrs(pool->p.dev, page, 0,
- (PAGE_SIZE << pool->p.order),
- pool->p.dma_dir, DMA_ATTR_SKIP_CPU_SYNC |
- DMA_ATTR_WEAK_ORDERING);
+ dma = dma_map_page_attrs(pool->p.dev, netmem_to_page(netmem), 0,
+ (PAGE_SIZE << pool->p.order), pool->p.dma_dir,
+ DMA_ATTR_SKIP_CPU_SYNC |
+ DMA_ATTR_WEAK_ORDERING);
if (dma_mapping_error(pool->p.dev, dma))
return false;
- if (page_pool_set_dma_addr(page, dma))
+ if (page_pool_set_dma_addr_netmem(netmem, dma))
goto unmap_failed;
- page_pool_dma_sync_for_device(pool, page, pool->p.max_len);
+ page_pool_dma_sync_for_device(pool, netmem, pool->p.max_len);
return true;
return false;
}
-static void page_pool_set_pp_info(struct page_pool *pool,
- struct page *page)
+static void page_pool_set_pp_info(struct page_pool *pool, netmem_ref netmem)
{
+ struct page *page = netmem_to_page(netmem);
+
page->pp = pool;
page->pp_magic |= PP_SIGNATURE;
* is dirtying the same cache line as the page->pp_magic above, so
* the overhead is negligible.
*/
- page_pool_fragment_page(page, 1);
+ page_pool_fragment_netmem(netmem, 1);
if (pool->has_init_callback)
- pool->slow.init_callback(page, pool->slow.init_arg);
+ pool->slow.init_callback(netmem, pool->slow.init_arg);
}
-static void page_pool_clear_pp_info(struct page *page)
+static void page_pool_clear_pp_info(netmem_ref netmem)
{
+ struct page *page = netmem_to_page(netmem);
+
page->pp_magic = 0;
page->pp = NULL;
}
if (unlikely(!page))
return NULL;
- if (pool->dma_map && unlikely(!page_pool_dma_map(pool, page))) {
+ if (pool->dma_map && unlikely(!page_pool_dma_map(pool, page_to_netmem(page)))) {
put_page(page);
return NULL;
}
alloc_stat_inc(pool, slow_high_order);
- page_pool_set_pp_info(pool, page);
+ page_pool_set_pp_info(pool, page_to_netmem(page));
/* Track how many pages are held 'in-flight' */
pool->pages_state_hold_cnt++;
- trace_page_pool_state_hold(pool, page, pool->pages_state_hold_cnt);
+ trace_page_pool_state_hold(pool, page_to_netmem(page),
+ pool->pages_state_hold_cnt);
return page;
}
/* slow path */
-noinline
-static struct page *__page_pool_alloc_pages_slow(struct page_pool *pool,
- gfp_t gfp)
+static noinline netmem_ref __page_pool_alloc_pages_slow(struct page_pool *pool,
+ gfp_t gfp)
{
const int bulk = PP_ALLOC_CACHE_REFILL;
unsigned int pp_order = pool->p.order;
bool dma_map = pool->dma_map;
- struct page *page;
+ netmem_ref netmem;
int i, nr_pages;
/* Don't support bulk alloc for high-order pages */
if (unlikely(pp_order))
- return __page_pool_alloc_page_order(pool, gfp);
+ return page_to_netmem(__page_pool_alloc_page_order(pool, gfp));
/* Unnecessary as alloc cache is empty, but guarantees zero count */
if (unlikely(pool->alloc.count > 0))
/* Mark empty alloc.cache slots "empty" for alloc_pages_bulk_array */
memset(&pool->alloc.cache, 0, sizeof(void *) * bulk);
- nr_pages = alloc_pages_bulk_array_node(gfp, pool->p.nid, bulk,
- pool->alloc.cache);
+ nr_pages = alloc_pages_bulk_array_node(gfp,
+ pool->p.nid, bulk,
+ (struct page **)pool->alloc.cache);
if (unlikely(!nr_pages))
- return NULL;
+ return 0;
/* Pages have been filled into alloc.cache array, but count is zero and
* page element have not been (possibly) DMA mapped.
*/
for (i = 0; i < nr_pages; i++) {
- page = pool->alloc.cache[i];
- if (dma_map && unlikely(!page_pool_dma_map(pool, page))) {
- put_page(page);
+ netmem = pool->alloc.cache[i];
+ if (dma_map && unlikely(!page_pool_dma_map(pool, netmem))) {
+ put_page(netmem_to_page(netmem));
continue;
}
- page_pool_set_pp_info(pool, page);
- pool->alloc.cache[pool->alloc.count++] = page;
+ page_pool_set_pp_info(pool, netmem);
+ pool->alloc.cache[pool->alloc.count++] = netmem;
/* Track how many pages are held 'in-flight' */
pool->pages_state_hold_cnt++;
- trace_page_pool_state_hold(pool, page,
+ trace_page_pool_state_hold(pool, netmem,
pool->pages_state_hold_cnt);
}
/* Return last page */
if (likely(pool->alloc.count > 0)) {
- page = pool->alloc.cache[--pool->alloc.count];
+ netmem = pool->alloc.cache[--pool->alloc.count];
alloc_stat_inc(pool, slow);
} else {
- page = NULL;
+ netmem = 0;
}
/* When page just alloc'ed is should/must have refcnt 1. */
- return page;
+ return netmem;
}
/* For using page_pool replace: alloc_pages() API calls, but provide
* synchronization guarantee for allocation side.
*/
-struct page *page_pool_alloc_pages(struct page_pool *pool, gfp_t gfp)
+netmem_ref page_pool_alloc_netmem(struct page_pool *pool, gfp_t gfp)
{
- struct page *page;
+ netmem_ref netmem;
/* Fast-path: Get a page from cache */
- page = __page_pool_get_cached(pool);
- if (page)
- return page;
+ netmem = __page_pool_get_cached(pool);
+ if (netmem)
+ return netmem;
/* Slow-path: cache empty, do real allocation */
- page = __page_pool_alloc_pages_slow(pool, gfp);
- return page;
+ netmem = __page_pool_alloc_pages_slow(pool, gfp);
+ return netmem;
+}
+EXPORT_SYMBOL(page_pool_alloc_netmem);
+
+struct page *page_pool_alloc_pages(struct page_pool *pool, gfp_t gfp)
+{
+ return netmem_to_page(page_pool_alloc_netmem(pool, gfp));
}
EXPORT_SYMBOL(page_pool_alloc_pages);
ALLOW_ERROR_INJECTION(page_pool_alloc_pages, NULL);
return inflight;
}
-static __always_inline
-void __page_pool_release_page_dma(struct page_pool *pool, struct page *page)
+static __always_inline void __page_pool_release_page_dma(struct page_pool *pool,
+ netmem_ref netmem)
{
dma_addr_t dma;
*/
return;
- dma = page_pool_get_dma_addr(page);
+ dma = page_pool_get_dma_addr_netmem(netmem);
/* When page is unmapped, it cannot be returned to our pool */
dma_unmap_page_attrs(pool->p.dev, dma,
PAGE_SIZE << pool->p.order, pool->p.dma_dir,
DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING);
- page_pool_set_dma_addr(page, 0);
+ page_pool_set_dma_addr_netmem(netmem, 0);
}
/* Disconnects a page (from a page_pool). API users can have a need
* a regular page (that will eventually be returned to the normal
* page-allocator via put_page).
*/
-void page_pool_return_page(struct page_pool *pool, struct page *page)
+void page_pool_return_page(struct page_pool *pool, netmem_ref netmem)
{
int count;
- __page_pool_release_page_dma(pool, page);
-
- page_pool_clear_pp_info(page);
+ __page_pool_release_page_dma(pool, netmem);
/* This may be the last page returned, releasing the pool, so
* it is not safe to reference pool afterwards.
*/
count = atomic_inc_return_relaxed(&pool->pages_state_release_cnt);
- trace_page_pool_state_release(pool, page, count);
+ trace_page_pool_state_release(pool, netmem, count);
- put_page(page);
+ page_pool_clear_pp_info(netmem);
+ put_page(netmem_to_page(netmem));
/* An optimization would be to call __free_pages(page, pool->p.order)
* knowing page is not part of page-cache (thus avoiding a
* __page_cache_release() call).
*/
}
-static bool page_pool_recycle_in_ring(struct page_pool *pool, struct page *page)
+static bool page_pool_recycle_in_ring(struct page_pool *pool, netmem_ref netmem)
{
int ret;
/* BH protection not needed if current is softirq */
if (in_softirq())
- ret = ptr_ring_produce(&pool->ring, page);
+ ret = ptr_ring_produce(&pool->ring, (__force void *)netmem);
else
- ret = ptr_ring_produce_bh(&pool->ring, page);
+ ret = ptr_ring_produce_bh(&pool->ring, (__force void *)netmem);
if (!ret) {
recycle_stat_inc(pool, ring);
*
* Caller must provide appropriate safe context.
*/
-static bool page_pool_recycle_in_cache(struct page *page,
+static bool page_pool_recycle_in_cache(netmem_ref netmem,
struct page_pool *pool)
{
if (unlikely(pool->alloc.count == PP_ALLOC_CACHE_SIZE)) {
}
/* Caller MUST have verified/know (page_ref_count(page) == 1) */
- pool->alloc.cache[pool->alloc.count++] = page;
+ pool->alloc.cache[pool->alloc.count++] = netmem;
recycle_stat_inc(pool, cached);
return true;
}
-static bool __page_pool_page_can_be_recycled(const struct page *page)
+static bool __page_pool_page_can_be_recycled(netmem_ref netmem)
{
- return page_ref_count(page) == 1 && !page_is_pfmemalloc(page);
+ return page_ref_count(netmem_to_page(netmem)) == 1 &&
+ !page_is_pfmemalloc(netmem_to_page(netmem));
}
/* If the page refcnt == 1, this will try to recycle the page.
* If the page refcnt != 1, then the page will be returned to memory
* subsystem.
*/
-static __always_inline struct page *
-__page_pool_put_page(struct page_pool *pool, struct page *page,
+static __always_inline netmem_ref
+__page_pool_put_page(struct page_pool *pool, netmem_ref netmem,
unsigned int dma_sync_size, bool allow_direct)
{
lockdep_assert_no_hardirq();
* page is NOT reusable when allocated when system is under
* some pressure. (page_is_pfmemalloc)
*/
- if (likely(__page_pool_page_can_be_recycled(page))) {
+ if (likely(__page_pool_page_can_be_recycled(netmem))) {
/* Read barrier done in page_ref_count / READ_ONCE */
- page_pool_dma_sync_for_device(pool, page, dma_sync_size);
+ page_pool_dma_sync_for_device(pool, netmem, dma_sync_size);
- if (allow_direct && page_pool_recycle_in_cache(page, pool))
- return NULL;
+ if (allow_direct && page_pool_recycle_in_cache(netmem, pool))
+ return 0;
/* Page found as candidate for recycling */
- return page;
+ return netmem;
}
/* Fallback/non-XDP mode: API user have elevated refcnt.
*
* will be invoking put_page.
*/
recycle_stat_inc(pool, released_refcnt);
- page_pool_return_page(pool, page);
+ page_pool_return_page(pool, netmem);
- return NULL;
+ return 0;
}
static bool page_pool_napi_local(const struct page_pool *pool)
return napi && READ_ONCE(napi->list_owner) == cpuid;
}
-void page_pool_put_unrefed_page(struct page_pool *pool, struct page *page,
- unsigned int dma_sync_size, bool allow_direct)
+void page_pool_put_unrefed_netmem(struct page_pool *pool, netmem_ref netmem,
+ unsigned int dma_sync_size, bool allow_direct)
{
if (!allow_direct)
allow_direct = page_pool_napi_local(pool);
- page = __page_pool_put_page(pool, page, dma_sync_size, allow_direct);
- if (page && !page_pool_recycle_in_ring(pool, page)) {
+ netmem =
+ __page_pool_put_page(pool, netmem, dma_sync_size, allow_direct);
+ if (netmem && !page_pool_recycle_in_ring(pool, netmem)) {
/* Cache full, fallback to free pages */
recycle_stat_inc(pool, ring_full);
- page_pool_return_page(pool, page);
+ page_pool_return_page(pool, netmem);
}
}
+EXPORT_SYMBOL(page_pool_put_unrefed_netmem);
+
+void page_pool_put_unrefed_page(struct page_pool *pool, struct page *page,
+ unsigned int dma_sync_size, bool allow_direct)
+{
+ page_pool_put_unrefed_netmem(pool, page_to_netmem(page), dma_sync_size,
+ allow_direct);
+}
EXPORT_SYMBOL(page_pool_put_unrefed_page);
/**
allow_direct = page_pool_napi_local(pool);
for (i = 0; i < count; i++) {
- struct page *page = virt_to_head_page(data[i]);
+ netmem_ref netmem = page_to_netmem(virt_to_head_page(data[i]));
/* It is not the last user for the page frag case */
- if (!page_pool_is_last_ref(page))
+ if (!page_pool_is_last_ref(netmem))
continue;
- page = __page_pool_put_page(pool, page, -1, allow_direct);
+ netmem = __page_pool_put_page(pool, netmem, -1, allow_direct);
/* Approved for bulk recycling in ptr_ring cache */
- if (page)
- data[bulk_len++] = page;
+ if (netmem)
+ data[bulk_len++] = (__force void *)netmem;
}
if (!bulk_len)
* since put_page() with refcnt == 1 can be an expensive operation
*/
for (; i < bulk_len; i++)
- page_pool_return_page(pool, data[i]);
+ page_pool_return_page(pool, (__force netmem_ref)data[i]);
}
EXPORT_SYMBOL(page_pool_put_page_bulk);
-static struct page *page_pool_drain_frag(struct page_pool *pool,
- struct page *page)
+static netmem_ref page_pool_drain_frag(struct page_pool *pool,
+ netmem_ref netmem)
{
long drain_count = BIAS_MAX - pool->frag_users;
/* Some user is still using the page frag */
- if (likely(page_pool_unref_page(page, drain_count)))
- return NULL;
+ if (likely(page_pool_unref_netmem(netmem, drain_count)))
+ return 0;
- if (__page_pool_page_can_be_recycled(page)) {
- page_pool_dma_sync_for_device(pool, page, -1);
- return page;
+ if (__page_pool_page_can_be_recycled(netmem)) {
+ page_pool_dma_sync_for_device(pool, netmem, -1);
+ return netmem;
}
- page_pool_return_page(pool, page);
- return NULL;
+ page_pool_return_page(pool, netmem);
+ return 0;
}
static void page_pool_free_frag(struct page_pool *pool)
{
long drain_count = BIAS_MAX - pool->frag_users;
- struct page *page = pool->frag_page;
+ netmem_ref netmem = pool->frag_page;
- pool->frag_page = NULL;
+ pool->frag_page = 0;
- if (!page || page_pool_unref_page(page, drain_count))
+ if (!netmem || page_pool_unref_netmem(netmem, drain_count))
return;
- page_pool_return_page(pool, page);
+ page_pool_return_page(pool, netmem);
}
-struct page *page_pool_alloc_frag(struct page_pool *pool,
- unsigned int *offset,
- unsigned int size, gfp_t gfp)
+netmem_ref page_pool_alloc_frag_netmem(struct page_pool *pool,
+ unsigned int *offset, unsigned int size,
+ gfp_t gfp)
{
unsigned int max_size = PAGE_SIZE << pool->p.order;
- struct page *page = pool->frag_page;
+ netmem_ref netmem = pool->frag_page;
if (WARN_ON(size > max_size))
- return NULL;
+ return 0;
size = ALIGN(size, dma_get_cache_alignment());
*offset = pool->frag_offset;
- if (page && *offset + size > max_size) {
- page = page_pool_drain_frag(pool, page);
- if (page) {
+ if (netmem && *offset + size > max_size) {
+ netmem = page_pool_drain_frag(pool, netmem);
+ if (netmem) {
alloc_stat_inc(pool, fast);
goto frag_reset;
}
}
- if (!page) {
- page = page_pool_alloc_pages(pool, gfp);
- if (unlikely(!page)) {
- pool->frag_page = NULL;
- return NULL;
+ if (!netmem) {
+ netmem = page_pool_alloc_netmem(pool, gfp);
+ if (unlikely(!netmem)) {
+ pool->frag_page = 0;
+ return 0;
}
- pool->frag_page = page;
+ pool->frag_page = netmem;
frag_reset:
pool->frag_users = 1;
*offset = 0;
pool->frag_offset = size;
- page_pool_fragment_page(page, BIAS_MAX);
- return page;
+ page_pool_fragment_netmem(netmem, BIAS_MAX);
+ return netmem;
}
pool->frag_users++;
pool->frag_offset = *offset + size;
alloc_stat_inc(pool, fast);
- return page;
+ return netmem;
+}
+EXPORT_SYMBOL(page_pool_alloc_frag_netmem);
+
+struct page *page_pool_alloc_frag(struct page_pool *pool, unsigned int *offset,
+ unsigned int size, gfp_t gfp)
+{
+ return netmem_to_page(page_pool_alloc_frag_netmem(pool, offset, size,
+ gfp));
}
EXPORT_SYMBOL(page_pool_alloc_frag);
static void page_pool_empty_ring(struct page_pool *pool)
{
- struct page *page;
+ netmem_ref netmem;
/* Empty recycle ring */
- while ((page = ptr_ring_consume_bh(&pool->ring))) {
+ while ((netmem = (__force netmem_ref)ptr_ring_consume_bh(&pool->ring))) {
/* Verify the refcnt invariant of cached pages */
- if (!(page_ref_count(page) == 1))
+ if (!(page_ref_count(netmem_to_page(netmem)) == 1))
pr_crit("%s() page_pool refcnt %d violation\n",
- __func__, page_ref_count(page));
+ __func__, netmem_ref_count(netmem));
- page_pool_return_page(pool, page);
+ page_pool_return_page(pool, netmem);
}
}
static void page_pool_empty_alloc_cache_once(struct page_pool *pool)
{
- struct page *page;
+ netmem_ref netmem;
if (pool->destroy_cnt)
return;
* call concurrently.
*/
while (pool->alloc.count) {
- page = pool->alloc.cache[--pool->alloc.count];
- page_pool_return_page(pool, page);
+ netmem = pool->alloc.cache[--pool->alloc.count];
+ page_pool_return_page(pool, netmem);
}
}
/* Caller must provide appropriate safe context, e.g. NAPI. */
void page_pool_update_nid(struct page_pool *pool, int new_nid)
{
- struct page *page;
+ netmem_ref netmem;
trace_page_pool_update_nid(pool, new_nid);
pool->p.nid = new_nid;
/* Flush pool alloc cache, as refill will check NUMA node */
while (pool->alloc.count) {
- page = pool->alloc.cache[--pool->alloc.count];
- page_pool_return_page(pool, page);
+ netmem = pool->alloc.cache[--pool->alloc.count];
+ page_pool_return_page(pool, netmem);
}
}
EXPORT_SYMBOL(page_pool_update_nid);
projects / users / dwmw2 / linux.git / commitdiff