net/core/page_pool_priv.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef __PAGE_POOL_PRIV_H
   4 #define __PAGE_POOL_PRIV_H
   5
   6 #include <net/page_pool/helpers.h>
   7
   8 #include "netmem_priv.h"
   9
  10 s32 page_pool_inflight(const struct page_pool *pool, bool strict);
  11
  12 int page_pool_list(struct page_pool *pool);
  13 void page_pool_detached(struct page_pool *pool);
  14 void page_pool_unlist(struct page_pool *pool);
  15
  16 static inline bool
  17 page_pool_set_dma_addr_netmem(netmem_ref netmem, dma_addr_t addr)
  18 {
  19         if (PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA) {
  20                 netmem_set_dma_addr(netmem, addr >> PAGE_SHIFT);
  21
  22                 /* We assume page alignment to shave off bottom bits,
  23                  * if this "compression" doesn't work we need to drop.
  24                  */
  25                 return addr != (dma_addr_t)netmem_get_dma_addr(netmem)
  26                                        << PAGE_SHIFT;
  27         }
  28
  29         netmem_set_dma_addr(netmem, addr);
  30         return false;
  31 }
  32
  33 static inline bool page_pool_set_dma_addr(struct page *page, dma_addr_t addr)
  34 {
  35         return page_pool_set_dma_addr_netmem(page_to_netmem(page), addr);
  36 }
  37
  38 #if defined(CONFIG_PAGE_POOL)
  39 void page_pool_set_pp_info(struct page_pool *pool, netmem_ref netmem);
  40 void page_pool_clear_pp_info(netmem_ref netmem);
  41 int page_pool_check_memory_provider(struct net_device *dev,
  42                                     struct netdev_rx_queue *rxq);
  43 #else
  44 static inline void page_pool_set_pp_info(struct page_pool *pool,
  45                                          netmem_ref netmem)
  46 {
  47 }
  48 static inline void page_pool_clear_pp_info(netmem_ref netmem)
  49 {
  50 }
  51 static inline int page_pool_check_memory_provider(struct net_device *dev,
  52                                                   struct netdev_rx_queue *rxq)
  53 {
  54         return 0;
  55 }
  56 #endif
  57
  58 #endif