diff options
| author | Benjamin Berg <benjamin.berg@intel.com> | 2024-07-03 12:58:54 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2024-07-04 13:50:05 +0200 |
| commit | adc902ceada26add77ad75426805e973a7c67f01 (patch) | |
| tree | 254e222d1030659999fac8fda27b9cf986102759 /drivers/net/wireless/intel/iwlwifi/pcie/internal.h | |
| parent | 7f5e3038f02902a1409c9ad0f07e3b11c581c113 (diff) | |
wifi: iwlwifi: keep the TSO and workaround pages mapped
Map the pages when allocating them so that we will not need to map each
of the used fragments at a later point.
For now the mapping is not used, this will be changed in a later commit.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20240703125541.7ced468fe431.Ibb109867dc680c37fe8d891e9ab9ef64ed5c5d2d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/internal.h')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/internal.h | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h index d63c1c284f70..b59de4f80b4b 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h @@ -603,6 +603,22 @@ struct iwl_tso_hdr_page { u8 *pos; }; +/* + * Note that we put this struct *last* in the page. By doing that, we ensure + * that no TB referencing this page can trigger the 32-bit boundary hardware + * bug. + */ +struct iwl_tso_page_info { + dma_addr_t dma_addr; + struct page *next; + refcount_t use_count; +}; + +#define IWL_TSO_PAGE_DATA_SIZE (PAGE_SIZE - sizeof(struct iwl_tso_page_info)) +#define IWL_TSO_PAGE_INFO(addr) \ + ((struct iwl_tso_page_info *)(((unsigned long)addr & PAGE_MASK) + \ + IWL_TSO_PAGE_DATA_SIZE)) + int iwl_pcie_tx_init(struct iwl_trans *trans); void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr); int iwl_pcie_tx_stop(struct iwl_trans *trans); @@ -628,8 +644,18 @@ struct sg_table *iwl_pcie_prep_tso(struct iwl_trans *trans, struct sk_buff *skb, struct iwl_cmd_meta *cmd_meta, u8 **hdr, unsigned int hdr_room); -void iwl_pcie_free_tso_page(struct iwl_trans *trans, struct sk_buff *skb, - struct iwl_cmd_meta *cmd_meta); +void iwl_pcie_free_tso_pages(struct iwl_trans *trans, struct sk_buff *skb, + struct iwl_cmd_meta *cmd_meta); + +static inline dma_addr_t iwl_pcie_get_tso_page_phys(void *addr) +{ + dma_addr_t res; + + res = IWL_TSO_PAGE_INFO(addr)->dma_addr; + res += (unsigned long)addr & ~PAGE_MASK; + + return res; +} static inline dma_addr_t iwl_txq_get_first_tb_dma(struct iwl_txq *txq, int idx) |