diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/queue')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/queue/tx.c | 1900 | ||||
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/queue/tx.h | 191 |
2 files changed, 0 insertions, 2091 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/queue/tx.c b/drivers/net/wireless/intel/iwlwifi/queue/tx.c deleted file mode 100644 index 6229c785c845..000000000000 --- a/drivers/net/wireless/intel/iwlwifi/queue/tx.c +++ /dev/null @@ -1,1900 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause -/* - * Copyright (C) 2020-2024 Intel Corporation - */ -#include <net/tso.h> -#include <linux/tcp.h> - -#include "iwl-debug.h" -#include "iwl-io.h" -#include "fw/api/commands.h" -#include "fw/api/tx.h" -#include "fw/api/datapath.h" -#include "fw/api/debug.h" -#include "queue/tx.h" -#include "iwl-fh.h" -#include "iwl-scd.h" -#include <linux/dmapool.h> - -/* - * iwl_txq_update_byte_tbl - Set up entry in Tx byte-count array - */ -static void iwl_pcie_gen2_update_byte_tbl(struct iwl_trans *trans, - struct iwl_txq *txq, u16 byte_cnt, - int num_tbs) -{ - int idx = iwl_txq_get_cmd_index(txq, txq->write_ptr); - u8 filled_tfd_size, num_fetch_chunks; - u16 len = byte_cnt; - __le16 bc_ent; - - if (WARN(idx >= txq->n_window, "%d >= %d\n", idx, txq->n_window)) - return; - - filled_tfd_size = offsetof(struct iwl_tfh_tfd, tbs) + - num_tbs * sizeof(struct iwl_tfh_tb); - /* - * filled_tfd_size contains the number of filled bytes in the TFD. - * Dividing it by 64 will give the number of chunks to fetch - * to SRAM- 0 for one chunk, 1 for 2 and so on. - * If, for example, TFD contains only 3 TBs then 32 bytes - * of the TFD are used, and only one chunk of 64 bytes should - * be fetched - */ - num_fetch_chunks = DIV_ROUND_UP(filled_tfd_size, 64) - 1; - - if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { - struct iwl_gen3_bc_tbl_entry *scd_bc_tbl_gen3 = txq->bc_tbl.addr; - - /* Starting from AX210, the HW expects bytes */ - WARN_ON(trans->txqs.bc_table_dword); - WARN_ON(len > 0x3FFF); - bc_ent = cpu_to_le16(len | (num_fetch_chunks << 14)); - scd_bc_tbl_gen3[idx].tfd_offset = bc_ent; - } else { - struct iwlagn_scd_bc_tbl *scd_bc_tbl = txq->bc_tbl.addr; - - /* Before AX210, the HW expects DW */ - WARN_ON(!trans->txqs.bc_table_dword); - len = DIV_ROUND_UP(len, 4); - WARN_ON(len > 0xFFF); - bc_ent = cpu_to_le16(len | (num_fetch_chunks << 12)); - scd_bc_tbl->tfd_offset[idx] = bc_ent; - } -} - -/* - * iwl_txq_inc_wr_ptr - Send new write index to hardware - */ -void iwl_txq_inc_wr_ptr(struct iwl_trans *trans, struct iwl_txq *txq) -{ - lockdep_assert_held(&txq->lock); - - IWL_DEBUG_TX(trans, "Q:%d WR: 0x%x\n", txq->id, txq->write_ptr); - - /* - * if not in power-save mode, uCode will never sleep when we're - * trying to tx (during RFKILL, we're not trying to tx). - */ - iwl_write32(trans, HBUS_TARG_WRPTR, txq->write_ptr | (txq->id << 16)); -} - -static u8 iwl_txq_gen2_get_num_tbs(struct iwl_trans *trans, - struct iwl_tfh_tfd *tfd) -{ - return le16_to_cpu(tfd->num_tbs) & 0x1f; -} - -int iwl_txq_gen2_set_tb(struct iwl_trans *trans, struct iwl_tfh_tfd *tfd, - dma_addr_t addr, u16 len) -{ - int idx = iwl_txq_gen2_get_num_tbs(trans, tfd); - struct iwl_tfh_tb *tb; - - /* Only WARN here so we know about the issue, but we mess up our - * unmap path because not every place currently checks for errors - * returned from this function - it can only return an error if - * there's no more space, and so when we know there is enough we - * don't always check ... - */ - WARN(iwl_txq_crosses_4g_boundary(addr, len), - "possible DMA problem with iova:0x%llx, len:%d\n", - (unsigned long long)addr, len); - - if (WARN_ON(idx >= IWL_TFH_NUM_TBS)) - return -EINVAL; - tb = &tfd->tbs[idx]; - - /* Each TFD can point to a maximum max_tbs Tx buffers */ - if (le16_to_cpu(tfd->num_tbs) >= trans->txqs.tfd.max_tbs) { - IWL_ERR(trans, "Error can not send more than %d chunks\n", - trans->txqs.tfd.max_tbs); - return -EINVAL; - } - - put_unaligned_le64(addr, &tb->addr); - tb->tb_len = cpu_to_le16(len); - - tfd->num_tbs = cpu_to_le16(idx + 1); - - return idx; -} - -static void iwl_txq_set_tfd_invalid_gen2(struct iwl_trans *trans, - struct iwl_tfh_tfd *tfd) -{ - tfd->num_tbs = 0; - - iwl_txq_gen2_set_tb(trans, tfd, trans->invalid_tx_cmd.dma, - trans->invalid_tx_cmd.size); -} - -void iwl_txq_gen2_tfd_unmap(struct iwl_trans *trans, struct iwl_cmd_meta *meta, - struct iwl_tfh_tfd *tfd) -{ - int i, num_tbs; - - /* Sanity check on number of chunks */ - num_tbs = iwl_txq_gen2_get_num_tbs(trans, tfd); - - if (num_tbs > trans->txqs.tfd.max_tbs) { - IWL_ERR(trans, "Too many chunks: %i\n", num_tbs); - return; - } - - /* first TB is never freed - it's the bidirectional DMA data */ - for (i = 1; i < num_tbs; i++) { - if (meta->tbs & BIT(i)) - dma_unmap_page(trans->dev, - le64_to_cpu(tfd->tbs[i].addr), - le16_to_cpu(tfd->tbs[i].tb_len), - DMA_TO_DEVICE); - else - dma_unmap_single(trans->dev, - le64_to_cpu(tfd->tbs[i].addr), - le16_to_cpu(tfd->tbs[i].tb_len), - DMA_TO_DEVICE); - } - - iwl_txq_set_tfd_invalid_gen2(trans, tfd); -} - -void iwl_txq_gen2_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq) -{ - /* rd_ptr is bounded by TFD_QUEUE_SIZE_MAX and - * idx is bounded by n_window - */ - int idx = iwl_txq_get_cmd_index(txq, txq->read_ptr); - struct sk_buff *skb; - - lockdep_assert_held(&txq->lock); - - if (!txq->entries) - return; - - iwl_txq_gen2_tfd_unmap(trans, &txq->entries[idx].meta, - iwl_txq_get_tfd(trans, txq, idx)); - - skb = txq->entries[idx].skb; - - /* Can be called from irqs-disabled context - * If skb is not NULL, it means that the whole queue is being - * freed and that the queue is not empty - free the skb - */ - if (skb) { - iwl_op_mode_free_skb(trans->op_mode, skb); - txq->entries[idx].skb = NULL; - } -} - -static struct page *get_workaround_page(struct iwl_trans *trans, - struct sk_buff *skb) -{ - struct page **page_ptr; - struct page *ret; - - page_ptr = (void *)((u8 *)skb->cb + trans->txqs.page_offs); - - ret = alloc_page(GFP_ATOMIC); - if (!ret) - return NULL; - - /* set the chaining pointer to the previous page if there */ - *(void **)((u8 *)page_address(ret) + PAGE_SIZE - sizeof(void *)) = *page_ptr; - *page_ptr = ret; - - return ret; -} - -/* - * Add a TB and if needed apply the FH HW bug workaround; - * meta != NULL indicates that it's a page mapping and we - * need to dma_unmap_page() and set the meta->tbs bit in - * this case. - */ -static int iwl_txq_gen2_set_tb_with_wa(struct iwl_trans *trans, - struct sk_buff *skb, - struct iwl_tfh_tfd *tfd, - dma_addr_t phys, void *virt, - u16 len, struct iwl_cmd_meta *meta) -{ - dma_addr_t oldphys = phys; - struct page *page; - int ret; - - if (unlikely(dma_mapping_error(trans->dev, phys))) - return -ENOMEM; - - if (likely(!iwl_txq_crosses_4g_boundary(phys, len))) { - ret = iwl_txq_gen2_set_tb(trans, tfd, phys, len); - - if (ret < 0) - goto unmap; - - if (meta) - meta->tbs |= BIT(ret); - - ret = 0; - goto trace; - } - - /* - * Work around a hardware bug. If (as expressed in the - * condition above) the TB ends on a 32-bit boundary, - * then the next TB may be accessed with the wrong - * address. - * To work around it, copy the data elsewhere and make - * a new mapping for it so the device will not fail. - */ - - if (WARN_ON(len > PAGE_SIZE - sizeof(void *))) { - ret = -ENOBUFS; - goto unmap; - } - - page = get_workaround_page(trans, skb); - if (!page) { - ret = -ENOMEM; - goto unmap; - } - - memcpy(page_address(page), virt, len); - - phys = dma_map_single(trans->dev, page_address(page), len, - DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(trans->dev, phys))) - return -ENOMEM; - ret = iwl_txq_gen2_set_tb(trans, tfd, phys, len); - if (ret < 0) { - /* unmap the new allocation as single */ - oldphys = phys; - meta = NULL; - goto unmap; - } - IWL_DEBUG_TX(trans, - "TB bug workaround: copied %d bytes from 0x%llx to 0x%llx\n", - len, (unsigned long long)oldphys, - (unsigned long long)phys); - - ret = 0; -unmap: - if (meta) - dma_unmap_page(trans->dev, oldphys, len, DMA_TO_DEVICE); - else - dma_unmap_single(trans->dev, oldphys, len, DMA_TO_DEVICE); -trace: - trace_iwlwifi_dev_tx_tb(trans->dev, skb, virt, phys, len); - - return ret; -} - -#ifdef CONFIG_INET -struct iwl_tso_hdr_page *get_page_hdr(struct iwl_trans *trans, size_t len, - struct sk_buff *skb) -{ - struct iwl_tso_hdr_page *p = this_cpu_ptr(trans->txqs.tso_hdr_page); - struct page **page_ptr; - - page_ptr = (void *)((u8 *)skb->cb + trans->txqs.page_offs); - - if (WARN_ON(*page_ptr)) - return NULL; - - if (!p->page) - goto alloc; - - /* - * Check if there's enough room on this page - * - * Note that we put a page chaining pointer *last* in the - * page - we need it somewhere, and if it's there then we - * avoid DMA mapping the last bits of the page which may - * trigger the 32-bit boundary hardware bug. - * - * (see also get_workaround_page() in tx-gen2.c) - */ - if (p->pos + len < (u8 *)page_address(p->page) + PAGE_SIZE - - sizeof(void *)) - goto out; - - /* We don't have enough room on this page, get a new one. */ - __free_page(p->page); - -alloc: - p->page = alloc_page(GFP_ATOMIC); - if (!p->page) - return NULL; - p->pos = page_address(p->page); - /* set the chaining pointer to NULL */ - *(void **)((u8 *)page_address(p->page) + PAGE_SIZE - sizeof(void *)) = NULL; -out: - *page_ptr = p->page; - get_page(p->page); - return p; -} -#endif - -static int iwl_txq_gen2_build_amsdu(struct iwl_trans *trans, - struct sk_buff *skb, - struct iwl_tfh_tfd *tfd, int start_len, - u8 hdr_len, - struct iwl_device_tx_cmd *dev_cmd) -{ -#ifdef CONFIG_INET - struct iwl_tx_cmd_gen2 *tx_cmd = (void *)dev_cmd->payload; - struct ieee80211_hdr *hdr = (void *)skb->data; - unsigned int snap_ip_tcp_hdrlen, ip_hdrlen, total_len, hdr_room; - unsigned int mss = skb_shinfo(skb)->gso_size; - u16 length, amsdu_pad; - u8 *start_hdr; - struct iwl_tso_hdr_page *hdr_page; - struct tso_t tso; - - trace_iwlwifi_dev_tx(trans->dev, skb, tfd, sizeof(*tfd), - &dev_cmd->hdr, start_len, 0); - - ip_hdrlen = skb_network_header_len(skb); - snap_ip_tcp_hdrlen = 8 + ip_hdrlen + tcp_hdrlen(skb); - total_len = skb->len - snap_ip_tcp_hdrlen - hdr_len; - amsdu_pad = 0; - - /* total amount of header we may need for this A-MSDU */ - hdr_room = DIV_ROUND_UP(total_len, mss) * - (3 + snap_ip_tcp_hdrlen + sizeof(struct ethhdr)); - - /* Our device supports 9 segments at most, it will fit in 1 page */ - hdr_page = get_page_hdr(trans, hdr_room, skb); - if (!hdr_page) - return -ENOMEM; - - start_hdr = hdr_page->pos; - - /* - * Pull the ieee80211 header to be able to use TSO core, - * we will restore it for the tx_status flow. - */ - skb_pull(skb, hdr_len); - - /* - * Remove the length of all the headers that we don't actually - * have in the MPDU by themselves, but that we duplicate into - * all the different MSDUs inside the A-MSDU. - */ - le16_add_cpu(&tx_cmd->len, -snap_ip_tcp_hdrlen); - - tso_start(skb, &tso); - - while (total_len) { - /* this is the data left for this subframe */ - unsigned int data_left = min_t(unsigned int, mss, total_len); - unsigned int tb_len; - dma_addr_t tb_phys; - u8 *subf_hdrs_start = hdr_page->pos; - - total_len -= data_left; - - memset(hdr_page->pos, 0, amsdu_pad); - hdr_page->pos += amsdu_pad; - amsdu_pad = (4 - (sizeof(struct ethhdr) + snap_ip_tcp_hdrlen + - data_left)) & 0x3; - ether_addr_copy(hdr_page->pos, ieee80211_get_DA(hdr)); - hdr_page->pos += ETH_ALEN; - ether_addr_copy(hdr_page->pos, ieee80211_get_SA(hdr)); - hdr_page->pos += ETH_ALEN; - - length = snap_ip_tcp_hdrlen + data_left; - *((__be16 *)hdr_page->pos) = cpu_to_be16(length); - hdr_page->pos += sizeof(length); - - /* - * This will copy the SNAP as well which will be considered - * as MAC header. - */ - tso_build_hdr(skb, hdr_page->pos, &tso, data_left, !total_len); - - hdr_page->pos += snap_ip_tcp_hdrlen; - - tb_len = hdr_page->pos - start_hdr; - tb_phys = dma_map_single(trans->dev, start_hdr, - tb_len, DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(trans->dev, tb_phys))) - goto out_err; - /* - * No need for _with_wa, this is from the TSO page and - * we leave some space at the end of it so can't hit - * the buggy scenario. - */ - iwl_txq_gen2_set_tb(trans, tfd, tb_phys, tb_len); - trace_iwlwifi_dev_tx_tb(trans->dev, skb, start_hdr, - tb_phys, tb_len); - /* add this subframe's headers' length to the tx_cmd */ - le16_add_cpu(&tx_cmd->len, hdr_page->pos - subf_hdrs_start); - - /* prepare the start_hdr for the next subframe */ - start_hdr = hdr_page->pos; - - /* put the payload */ - while (data_left) { - int ret; - - tb_len = min_t(unsigned int, tso.size, data_left); - tb_phys = dma_map_single(trans->dev, tso.data, - tb_len, DMA_TO_DEVICE); - ret = iwl_txq_gen2_set_tb_with_wa(trans, skb, tfd, - tb_phys, tso.data, - tb_len, NULL); - if (ret) - goto out_err; - - data_left -= tb_len; - tso_build_data(skb, &tso, tb_len); - } - } - - /* re -add the WiFi header */ - skb_push(skb, hdr_len); - - return 0; - -out_err: -#endif - return -EINVAL; -} - -static struct -iwl_tfh_tfd *iwl_txq_gen2_build_tx_amsdu(struct iwl_trans *trans, - struct iwl_txq *txq, - struct iwl_device_tx_cmd *dev_cmd, - struct sk_buff *skb, - struct iwl_cmd_meta *out_meta, - int hdr_len, - int tx_cmd_len) -{ - int idx = iwl_txq_get_cmd_index(txq, txq->write_ptr); - struct iwl_tfh_tfd *tfd = iwl_txq_get_tfd(trans, txq, idx); - dma_addr_t tb_phys; - int len; - void *tb1_addr; - - tb_phys = iwl_txq_get_first_tb_dma(txq, idx); - - /* - * No need for _with_wa, the first TB allocation is aligned up - * to a 64-byte boundary and thus can't be at the end or cross - * a page boundary (much less a 2^32 boundary). - */ - iwl_txq_gen2_set_tb(trans, tfd, tb_phys, IWL_FIRST_TB_SIZE); - - /* - * The second TB (tb1) points to the remainder of the TX command - * and the 802.11 header - dword aligned size - * (This calculation modifies the TX command, so do it before the - * setup of the first TB) - */ - len = tx_cmd_len + sizeof(struct iwl_cmd_header) + hdr_len - - IWL_FIRST_TB_SIZE; - - /* do not align A-MSDU to dword as the subframe header aligns it */ - - /* map the data for TB1 */ - tb1_addr = ((u8 *)&dev_cmd->hdr) + IWL_FIRST_TB_SIZE; - tb_phys = dma_map_single(trans->dev, tb1_addr, len, DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(trans->dev, tb_phys))) - goto out_err; - /* - * No need for _with_wa(), we ensure (via alignment) that the data - * here can never cross or end at a page boundary. - */ - iwl_txq_gen2_set_tb(trans, tfd, tb_phys, len); - - if (iwl_txq_gen2_build_amsdu(trans, skb, tfd, len + IWL_FIRST_TB_SIZE, - hdr_len, dev_cmd)) - goto out_err; - - /* building the A-MSDU might have changed this data, memcpy it now */ - memcpy(&txq->first_tb_bufs[idx], dev_cmd, IWL_FIRST_TB_SIZE); - return tfd; - -out_err: - iwl_txq_gen2_tfd_unmap(trans, out_meta, tfd); - return NULL; -} - -static int iwl_txq_gen2_tx_add_frags(struct iwl_trans *trans, - struct sk_buff *skb, - struct iwl_tfh_tfd *tfd, - struct iwl_cmd_meta *out_meta) -{ - int i; - - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { - const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; - dma_addr_t tb_phys; - unsigned int fragsz = skb_frag_size(frag); - int ret; - - if (!fragsz) - continue; - - tb_phys = skb_frag_dma_map(trans->dev, frag, 0, - fragsz, DMA_TO_DEVICE); - ret = iwl_txq_gen2_set_tb_with_wa(trans, skb, tfd, tb_phys, - skb_frag_address(frag), - fragsz, out_meta); - if (ret) - return ret; - } - - return 0; -} - -static struct -iwl_tfh_tfd *iwl_txq_gen2_build_tx(struct iwl_trans *trans, - struct iwl_txq *txq, - struct iwl_device_tx_cmd *dev_cmd, - struct sk_buff *skb, - struct iwl_cmd_meta *out_meta, - int hdr_len, - int tx_cmd_len, - bool pad) -{ - int idx = iwl_txq_get_cmd_index(txq, txq->write_ptr); - struct iwl_tfh_tfd *tfd = iwl_txq_get_tfd(trans, txq, idx); - dma_addr_t tb_phys; - int len, tb1_len, tb2_len; - void *tb1_addr; - struct sk_buff *frag; - - tb_phys = iwl_txq_get_first_tb_dma(txq, idx); - - /* The first TB points to bi-directional DMA data */ - memcpy(&txq->first_tb_bufs[idx], dev_cmd, IWL_FIRST_TB_SIZE); - - /* - * No need for _with_wa, the first TB allocation is aligned up - * to a 64-byte boundary and thus can't be at the end or cross - * a page boundary (much less a 2^32 boundary). - */ - iwl_txq_gen2_set_tb(trans, tfd, tb_phys, IWL_FIRST_TB_SIZE); - - /* - * The second TB (tb1) points to the remainder of the TX command - * and the 802.11 header - dword aligned size - * (This calculation modifies the TX command, so do it before the - * setup of the first TB) - */ - len = tx_cmd_len + sizeof(struct iwl_cmd_header) + hdr_len - - IWL_FIRST_TB_SIZE; - - if (pad) - tb1_len = ALIGN(len, 4); - else - tb1_len = len; - - /* map the data for TB1 */ - tb1_addr = ((u8 *)&dev_cmd->hdr) + IWL_FIRST_TB_SIZE; - tb_phys = dma_map_single(trans->dev, tb1_addr, tb1_len, DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(trans->dev, tb_phys))) - goto out_err; - /* - * No need for _with_wa(), we ensure (via alignment) that the data - * here can never cross or end at a page boundary. - */ - iwl_txq_gen2_set_tb(trans, tfd, tb_phys, tb1_len); - trace_iwlwifi_dev_tx(trans->dev, skb, tfd, sizeof(*tfd), &dev_cmd->hdr, - IWL_FIRST_TB_SIZE + tb1_len, hdr_len); - - /* set up TFD's third entry to point to remainder of skb's head */ - tb2_len = skb_headlen(skb) - hdr_len; - - if (tb2_len > 0) { - int ret; - - tb_phys = dma_map_single(trans->dev, skb->data + hdr_len, - tb2_len, DMA_TO_DEVICE); - ret = iwl_txq_gen2_set_tb_with_wa(trans, skb, tfd, tb_phys, - skb->data + hdr_len, tb2_len, - NULL); - if (ret) - goto out_err; - } - - if (iwl_txq_gen2_tx_add_frags(trans, skb, tfd, out_meta)) - goto out_err; - - skb_walk_frags(skb, frag) { - int ret; - - tb_phys = dma_map_single(trans->dev, frag->data, - skb_headlen(frag), DMA_TO_DEVICE); - ret = iwl_txq_gen2_set_tb_with_wa(trans, skb, tfd, tb_phys, - frag->data, - skb_headlen(frag), NULL); - if (ret) - goto out_err; - if (iwl_txq_gen2_tx_add_frags(trans, frag, tfd, out_meta)) - goto out_err; - } - - return tfd; - -out_err: - iwl_txq_gen2_tfd_unmap(trans, out_meta, tfd); - return NULL; -} - -static -struct iwl_tfh_tfd *iwl_txq_gen2_build_tfd(struct iwl_trans *trans, - struct iwl_txq *txq, - struct iwl_device_tx_cmd *dev_cmd, - struct sk_buff *skb, - struct iwl_cmd_meta *out_meta) -{ - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - int idx = iwl_txq_get_cmd_index(txq, txq->write_ptr); - struct iwl_tfh_tfd *tfd = iwl_txq_get_tfd(trans, txq, idx); - int len, hdr_len; - bool amsdu; - - /* There must be data left over for TB1 or this code must be changed */ - BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) < IWL_FIRST_TB_SIZE); - BUILD_BUG_ON(sizeof(struct iwl_cmd_header) + - offsetofend(struct iwl_tx_cmd_gen2, dram_info) > - IWL_FIRST_TB_SIZE); - BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) < IWL_FIRST_TB_SIZE); - BUILD_BUG_ON(sizeof(struct iwl_cmd_header) + - offsetofend(struct iwl_tx_cmd_gen3, dram_info) > - IWL_FIRST_TB_SIZE); - - memset(tfd, 0, sizeof(*tfd)); - - if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210) - len = sizeof(struct iwl_tx_cmd_gen2); - else - len = sizeof(struct iwl_tx_cmd_gen3); - - amsdu = ieee80211_is_data_qos(hdr->frame_control) && - (*ieee80211_get_qos_ctl(hdr) & - IEEE80211_QOS_CTL_A_MSDU_PRESENT); - - hdr_len = ieee80211_hdrlen(hdr->frame_control); - - /* - * Only build A-MSDUs here if doing so by GSO, otherwise it may be - * an A-MSDU for other reasons, e.g. NAN or an A-MSDU having been - * built in the higher layers already. - */ - if (amsdu && skb_shinfo(skb)->gso_size) - return iwl_txq_gen2_build_tx_amsdu(trans, txq, dev_cmd, skb, - out_meta, hdr_len, len); - return iwl_txq_gen2_build_tx(trans, txq, dev_cmd, skb, out_meta, - hdr_len, len, !amsdu); -} - -int iwl_txq_space(struct iwl_trans *trans, const struct iwl_txq *q) -{ - unsigned int max; - unsigned int used; - - /* - * To avoid ambiguity between empty and completely full queues, there - * should always be less than max_tfd_queue_size elements in the queue. - * If q->n_window is smaller than max_tfd_queue_size, there is no need - * to reserve any queue entries for this purpose. - */ - if (q->n_window < trans->trans_cfg->base_params->max_tfd_queue_size) - max = q->n_window; - else - max = trans->trans_cfg->base_params->max_tfd_queue_size - 1; - - /* - * max_tfd_queue_size is a power of 2, so the following is equivalent to - * modulo by max_tfd_queue_size and is well defined. - */ - used = (q->write_ptr - q->read_ptr) & - (trans->trans_cfg->base_params->max_tfd_queue_size - 1); - - if (WARN_ON(used > max)) - return 0; - - return max - used; -} - -int iwl_txq_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb, - struct iwl_device_tx_cmd *dev_cmd, int txq_id) -{ - struct iwl_cmd_meta *out_meta; - struct iwl_txq *txq = trans->txqs.txq[txq_id]; - u16 cmd_len; - int idx; - void *tfd; - - if (WARN_ONCE(txq_id >= IWL_MAX_TVQM_QUEUES, - "queue %d out of range", txq_id)) - return -EINVAL; - - if (WARN_ONCE(!test_bit(txq_id, trans->txqs.queue_used), - "TX on unused queue %d\n", txq_id)) - return -EINVAL; - - if (skb_is_nonlinear(skb) && - skb_shinfo(skb)->nr_frags > IWL_TRANS_MAX_FRAGS(trans) && - __skb_linearize(skb)) - return -ENOMEM; - - spin_lock(&txq->lock); - - if (iwl_txq_space(trans, txq) < txq->high_mark) { - iwl_txq_stop(trans, txq); - - /* don't put the packet on the ring, if there is no room */ - if (unlikely(iwl_txq_space(trans, txq) < 3)) { - struct iwl_device_tx_cmd **dev_cmd_ptr; - - dev_cmd_ptr = (void *)((u8 *)skb->cb + - trans->txqs.dev_cmd_offs); - - *dev_cmd_ptr = dev_cmd; - __skb_queue_tail(&txq->overflow_q, skb); - spin_unlock(&txq->lock); - return 0; - } - } - - idx = iwl_txq_get_cmd_index(txq, txq->write_ptr); - - /* Set up driver data for this TFD */ - txq->entries[idx].skb = skb; - txq->entries[idx].cmd = dev_cmd; - - dev_cmd->hdr.sequence = - cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | - INDEX_TO_SEQ(idx))); - - /* Set up first empty entry in queue's array of Tx/cmd buffers */ - out_meta = &txq->entries[idx].meta; - out_meta->flags = 0; - - tfd = iwl_txq_gen2_build_tfd(trans, txq, dev_cmd, skb, out_meta); - if (!tfd) { - spin_unlock(&txq->lock); - return -1; - } - - if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { - struct iwl_tx_cmd_gen3 *tx_cmd_gen3 = - (void *)dev_cmd->payload; - - cmd_len = le16_to_cpu(tx_cmd_gen3->len); - } else { - struct iwl_tx_cmd_gen2 *tx_cmd_gen2 = - (void *)dev_cmd->payload; - - cmd_len = le16_to_cpu(tx_cmd_gen2->len); - } - - /* Set up entry for this TFD in Tx byte-count array */ - iwl_pcie_gen2_update_byte_tbl(trans, txq, cmd_len, - iwl_txq_gen2_get_num_tbs(trans, tfd)); - - /* start timer if queue currently empty */ - if (txq->read_ptr == txq->write_ptr && txq->wd_timeout) - mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout); - - /* Tell device the write index *just past* this latest filled TFD */ - txq->write_ptr = iwl_txq_inc_wrap(trans, txq->write_ptr); - iwl_txq_inc_wr_ptr(trans, txq); - /* - * At this point the frame is "transmitted" successfully - * and we will get a TX status notification eventually. - */ - spin_unlock(&txq->lock); - return 0; -} - -/*************** HOST COMMAND QUEUE FUNCTIONS *****/ - -/* - * iwl_txq_gen2_unmap - Unmap any remaining DMA mappings and free skb's - */ -void iwl_txq_gen2_unmap(struct iwl_trans *trans, int txq_id) -{ - struct iwl_txq *txq = trans->txqs.txq[txq_id]; - - spin_lock_bh(&txq->lock); - while (txq->write_ptr != txq->read_ptr) { - IWL_DEBUG_TX_REPLY(trans, "Q %d Free %d\n", - txq_id, txq->read_ptr); - - if (txq_id != trans->txqs.cmd.q_id) { - int idx = iwl_txq_get_cmd_index(txq, txq->read_ptr); - struct sk_buff *skb = txq->entries[idx].skb; - - if (!WARN_ON_ONCE(!skb)) - iwl_txq_free_tso_page(trans, skb); - } - iwl_txq_gen2_free_tfd(trans, txq); - txq->read_ptr = iwl_txq_inc_wrap(trans, txq->read_ptr); - } - - while (!skb_queue_empty(&txq->overflow_q)) { - struct sk_buff *skb = __skb_dequeue(&txq->overflow_q); - - iwl_op_mode_free_skb(trans->op_mode, skb); - } - - spin_unlock_bh(&txq->lock); - - /* just in case - this queue may have been stopped */ - iwl_wake_queue(trans, txq); -} - -static void iwl_txq_gen2_free_memory(struct iwl_trans *trans, - struct iwl_txq *txq) -{ - struct device *dev = trans->dev; - - /* De-alloc circular buffer of TFDs */ - if (txq->tfds) { - dma_free_coherent(dev, - trans->txqs.tfd.size * txq->n_window, - txq->tfds, txq->dma_addr); - dma_free_coherent(dev, - sizeof(*txq->first_tb_bufs) * txq->n_window, - txq->first_tb_bufs, txq->first_tb_dma); - } - - kfree(txq->entries); - if (txq->bc_tbl.addr) - dma_pool_free(trans->txqs.bc_pool, - txq->bc_tbl.addr, txq->bc_tbl.dma); - kfree(txq); -} - -/* - * iwl_pcie_txq_free - Deallocate DMA queue. - * @txq: Transmit queue to deallocate. - * - * Empty queue by removing and destroying all BD's. - * Free all buffers. - * 0-fill, but do not free "txq" descriptor structure. - */ -static void iwl_txq_gen2_free(struct iwl_trans *trans, int txq_id) -{ - struct iwl_txq *txq; - int i; - - if (WARN_ONCE(txq_id >= IWL_MAX_TVQM_QUEUES, - "queue %d out of range", txq_id)) - return; - - txq = trans->txqs.txq[txq_id]; - - if (WARN_ON(!txq)) - return; - - iwl_txq_gen2_unmap(trans, txq_id); - - /* De-alloc array of command/tx buffers */ - if (txq_id == trans->txqs.cmd.q_id) - for (i = 0; i < txq->n_window; i++) { - kfree_sensitive(txq->entries[i].cmd); - kfree_sensitive(txq->entries[i].free_buf); - } - del_timer_sync(&txq->stuck_timer); - - iwl_txq_gen2_free_memory(trans, txq); - - trans->txqs.txq[txq_id] = NULL; - - clear_bit(txq_id, trans->txqs.queue_used); -} - -/* - * iwl_queue_init - Initialize queue's high/low-water and read/write indexes - */ -static int iwl_queue_init(struct iwl_txq *q, int slots_num) -{ - q->n_window = slots_num; - - /* slots_num must be power-of-two size, otherwise - * iwl_txq_get_cmd_index is broken. */ - if (WARN_ON(!is_power_of_2(slots_num))) - return -EINVAL; - - q->low_mark = q->n_window / 4; - if (q->low_mark < 4) - q->low_mark = 4; - - q->high_mark = q->n_window / 8; - if (q->high_mark < 2) - q->high_mark = 2; - - q->write_ptr = 0; - q->read_ptr = 0; - - return 0; -} - -int iwl_txq_init(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num, - bool cmd_queue) -{ - int ret; - u32 tfd_queue_max_size = - trans->trans_cfg->base_params->max_tfd_queue_size; - - txq->need_update = false; - - /* max_tfd_queue_size must be power-of-two size, otherwise - * iwl_txq_inc_wrap and iwl_txq_dec_wrap are broken. */ - if (WARN_ONCE(tfd_queue_max_size & (tfd_queue_max_size - 1), - "Max tfd queue size must be a power of two, but is %d", - tfd_queue_max_size)) - return -EINVAL; - - /* Initialize queue's high/low-water marks, and head/tail indexes */ - ret = iwl_queue_init(txq, slots_num); - if (ret) - return ret; - - spin_lock_init(&txq->lock); - - if (cmd_queue) { - static struct lock_class_key iwl_txq_cmd_queue_lock_class; - - lockdep_set_class(&txq->lock, &iwl_txq_cmd_queue_lock_class); - } - - __skb_queue_head_init(&txq->overflow_q); - - return 0; -} - -void iwl_txq_free_tso_page(struct iwl_trans *trans, struct sk_buff *skb) -{ - struct page **page_ptr; - struct page *next; - - page_ptr = (void *)((u8 *)skb->cb + trans->txqs.page_offs); - next = *page_ptr; - *page_ptr = NULL; - - while (next) { - struct page *tmp = next; - - next = *(void **)((u8 *)page_address(next) + PAGE_SIZE - - sizeof(void *)); - __free_page(tmp); - } -} - -void iwl_txq_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq) -{ - u32 txq_id = txq->id; - u32 status; - bool active; - u8 fifo; - - if (trans->trans_cfg->gen2) { - IWL_ERR(trans, "Queue %d is stuck %d %d\n", txq_id, - txq->read_ptr, txq->write_ptr); - /* TODO: access new SCD registers and dump them */ - return; - } - - status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id)); - fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7; - active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE)); - - IWL_ERR(trans, - "Queue %d is %sactive on fifo %d and stuck for %u ms. SW [%d, %d] HW [%d, %d] FH TRB=0x0%x\n", - txq_id, active ? "" : "in", fifo, - jiffies_to_msecs(txq->wd_timeout), - txq->read_ptr, txq->write_ptr, - iwl_read_prph(trans, SCD_QUEUE_RDPTR(txq_id)) & - (trans->trans_cfg->base_params->max_tfd_queue_size - 1), - iwl_read_prph(trans, SCD_QUEUE_WRPTR(txq_id)) & - (trans->trans_cfg->base_params->max_tfd_queue_size - 1), - iwl_read_direct32(trans, FH_TX_TRB_REG(fifo))); -} - -static void iwl_txq_stuck_timer(struct timer_list *t) -{ - struct iwl_txq *txq = from_timer(txq, t, stuck_timer); - struct iwl_trans *trans = txq->trans; - - spin_lock(&txq->lock); - /* check if triggered erroneously */ - if (txq->read_ptr == txq->write_ptr) { - spin_unlock(&txq->lock); - return; - } - spin_unlock(&txq->lock); - - iwl_txq_log_scd_error(trans, txq); - - iwl_force_nmi(trans); -} - -static void iwl_txq_set_tfd_invalid_gen1(struct iwl_trans *trans, - struct iwl_tfd *tfd) -{ - tfd->num_tbs = 0; - - iwl_pcie_gen1_tfd_set_tb(trans, tfd, 0, trans->invalid_tx_cmd.dma, - trans->invalid_tx_cmd.size); -} - -int iwl_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num, - bool cmd_queue) -{ - size_t num_entries = trans->trans_cfg->gen2 ? - slots_num : trans->trans_cfg->base_params->max_tfd_queue_size; - size_t tfd_sz; - size_t tb0_buf_sz; - int i; - - if (WARN_ONCE(slots_num <= 0, "Invalid slots num:%d\n", slots_num)) - return -EINVAL; - - if (WARN_ON(txq->entries || txq->tfds)) - return -EINVAL; - - tfd_sz = trans->txqs.tfd.size * num_entries; - - timer_setup(&txq->stuck_timer, iwl_txq_stuck_timer, 0); - txq->trans = trans; - - txq->n_window = slots_num; - - txq->entries = kcalloc(slots_num, - sizeof(struct iwl_pcie_txq_entry), - GFP_KERNEL); - - if (!txq->entries) - goto error; - - if (cmd_queue) - for (i = 0; i < slots_num; i++) { - txq->entries[i].cmd = - kmalloc(sizeof(struct iwl_device_cmd), - GFP_KERNEL); - if (!txq->entries[i].cmd) - goto error; - } - - /* Circular buffer of transmit frame descriptors (TFDs), - * shared with device */ - txq->tfds = dma_alloc_coherent(trans->dev, tfd_sz, - &txq->dma_addr, GFP_KERNEL); - if (!txq->tfds) - goto error; - - BUILD_BUG_ON(sizeof(*txq->first_tb_bufs) != IWL_FIRST_TB_SIZE_ALIGN); - - tb0_buf_sz = sizeof(*txq->first_tb_bufs) * slots_num; - - txq->first_tb_bufs = dma_alloc_coherent(trans->dev, tb0_buf_sz, - &txq->first_tb_dma, - GFP_KERNEL); - if (!txq->first_tb_bufs) - goto err_free_tfds; - - for (i = 0; i < num_entries; i++) { - void *tfd = iwl_txq_get_tfd(trans, txq, i); - - if (trans->trans_cfg->gen2) - iwl_txq_set_tfd_invalid_gen2(trans, tfd); - else - iwl_txq_set_tfd_invalid_gen1(trans, tfd); - } - - return 0; -err_free_tfds: - dma_free_coherent(trans->dev, tfd_sz, txq->tfds, txq->dma_addr); - txq->tfds = NULL; -error: - if (txq->entries && cmd_queue) - for (i = 0; i < slots_num; i++) - kfree(txq->entries[i].cmd); - kfree(txq->entries); - txq->entries = NULL; - - return -ENOMEM; -} - -static struct iwl_txq * -iwl_txq_dyn_alloc_dma(struct iwl_trans *trans, int size, unsigned int timeout) -{ - size_t bc_tbl_size, bc_tbl_entries; - struct iwl_txq *txq; - int ret; - - WARN_ON(!trans->txqs.bc_tbl_size); - - bc_tbl_size = trans->txqs.bc_tbl_size; - bc_tbl_entries = bc_tbl_size / sizeof(u16); - - if (WARN_ON(size > bc_tbl_entries)) - return ERR_PTR(-EINVAL); - - txq = kzalloc(sizeof(*txq), GFP_KERNEL); - if (!txq) - return ERR_PTR(-ENOMEM); - - txq->bc_tbl.addr = dma_pool_alloc(trans->txqs.bc_pool, GFP_KERNEL, - &txq->bc_tbl.dma); - if (!txq->bc_tbl.addr) { - IWL_ERR(trans, "Scheduler BC Table allocation failed\n"); - kfree(txq); - return ERR_PTR(-ENOMEM); - } - - ret = iwl_txq_alloc(trans, txq, size, false); - if (ret) { - IWL_ERR(trans, "Tx queue alloc failed\n"); - goto error; - } - ret = iwl_txq_init(trans, txq, size, false); - if (ret) { - IWL_ERR(trans, "Tx queue init failed\n"); - goto error; - } - - txq->wd_timeout = msecs_to_jiffies(timeout); - - return txq; - -error: - iwl_txq_gen2_free_memory(trans, txq); - return ERR_PTR(ret); -} - -static int iwl_txq_alloc_response(struct iwl_trans *trans, struct iwl_txq *txq, - struct iwl_host_cmd *hcmd) -{ - struct iwl_tx_queue_cfg_rsp *rsp; - int ret, qid; - u32 wr_ptr; - - if (WARN_ON(iwl_rx_packet_payload_len(hcmd->resp_pkt) != - sizeof(*rsp))) { - ret = -EINVAL; - goto error_free_resp; - } - - rsp = (void *)hcmd->resp_pkt->data; - qid = le16_to_cpu(rsp->queue_number); - wr_ptr = le16_to_cpu(rsp->write_pointer); - - if (qid >= ARRAY_SIZE(trans->txqs.txq)) { - WARN_ONCE(1, "queue index %d unsupported", qid); - ret = -EIO; - goto error_free_resp; - } - - if (test_and_set_bit(qid, trans->txqs.queue_used)) { - WARN_ONCE(1, "queue %d already used", qid); - ret = -EIO; - goto error_free_resp; - } - - if (WARN_ONCE(trans->txqs.txq[qid], - "queue %d already allocated\n", qid)) { - ret = -EIO; - goto error_free_resp; - } - - txq->id = qid; - trans->txqs.txq[qid] = txq; - wr_ptr &= (trans->trans_cfg->base_params->max_tfd_queue_size - 1); - - /* Place first TFD at index corresponding to start sequence number */ - txq->read_ptr = wr_ptr; - txq->write_ptr = wr_ptr; - - IWL_DEBUG_TX_QUEUES(trans, "Activate queue %d\n", qid); - - iwl_free_resp(hcmd); - return qid; - -error_free_resp: - iwl_free_resp(hcmd); - iwl_txq_gen2_free_memory(trans, txq); - return ret; -} - -int iwl_txq_dyn_alloc(struct iwl_trans *trans, u32 flags, u32 sta_mask, - u8 tid, int size, unsigned int timeout) -{ - struct iwl_txq *txq; - union { - struct iwl_tx_queue_cfg_cmd old; - struct iwl_scd_queue_cfg_cmd new; - } cmd; - struct iwl_host_cmd hcmd = { - .flags = CMD_WANT_SKB, - }; - int ret; - - if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_BZ && - trans->hw_rev_step == SILICON_A_STEP) - size = 4096; - - txq = iwl_txq_dyn_alloc_dma(trans, size, timeout); - if (IS_ERR(txq)) - return PTR_ERR(txq); - - if (trans->txqs.queue_alloc_cmd_ver == 0) { - memset(&cmd.old, 0, sizeof(cmd.old)); - cmd.old.tfdq_addr = cpu_to_le64(txq->dma_addr); - cmd.old.byte_cnt_addr = cpu_to_le64(txq->bc_tbl.dma); - cmd.old.cb_size = cpu_to_le32(TFD_QUEUE_CB_SIZE(size)); - cmd.old.flags = cpu_to_le16(flags | TX_QUEUE_CFG_ENABLE_QUEUE); - cmd.old.tid = tid; - - if (hweight32(sta_mask) != 1) { - ret = -EINVAL; - goto error; - } - cmd.old.sta_id = ffs(sta_mask) - 1; - - hcmd.id = SCD_QUEUE_CFG; - hcmd.len[0] = sizeof(cmd.old); - hcmd.data[0] = &cmd.old; - } else if (trans->txqs.queue_alloc_cmd_ver == 3) { - memset(&cmd.new, 0, sizeof(cmd.new)); - cmd.new.operation = cpu_to_le32(IWL_SCD_QUEUE_ADD); - cmd.new.u.add.tfdq_dram_addr = cpu_to_le64(txq->dma_addr); - cmd.new.u.add.bc_dram_addr = cpu_to_le64(txq->bc_tbl.dma); - cmd.new.u.add.cb_size = cpu_to_le32(TFD_QUEUE_CB_SIZE(size)); - cmd.new.u.add.flags = cpu_to_le32(flags); - cmd.new.u.add.sta_mask = cpu_to_le32(sta_mask); - cmd.new.u.add.tid = tid; - - hcmd.id = WIDE_ID(DATA_PATH_GROUP, SCD_QUEUE_CONFIG_CMD); - hcmd.len[0] = sizeof(cmd.new); - hcmd.data[0] = &cmd.new; - } else { - ret = -EOPNOTSUPP; - goto error; - } - - ret = iwl_trans_send_cmd(trans, &hcmd); - if (ret) - goto error; - - return iwl_txq_alloc_response(trans, txq, &hcmd); - -error: - iwl_txq_gen2_free_memory(trans, txq); - return ret; -} - -void iwl_txq_dyn_free(struct iwl_trans *trans, int queue) -{ - if (WARN(queue >= IWL_MAX_TVQM_QUEUES, - "queue %d out of range", queue)) - return; - - /* - * Upon HW Rfkill - we stop the device, and then stop the queues - * in the op_mode. Just for the sake of the simplicity of the op_mode, - * allow the op_mode to call txq_disable after it already called - * stop_device. - */ - if (!test_and_clear_bit(queue, trans->txqs.queue_used)) { - WARN_ONCE(test_bit(STATUS_DEVICE_ENABLED, &trans->status), - "queue %d not used", queue); - return; - } - - iwl_txq_gen2_free(trans, queue); - - IWL_DEBUG_TX_QUEUES(trans, "Deactivate queue %d\n", queue); -} - -void iwl_txq_gen2_tx_free(struct iwl_trans *trans) -{ - int i; - - memset(trans->txqs.queue_used, 0, sizeof(trans->txqs.queue_used)); - - /* Free all TX queues */ - for (i = 0; i < ARRAY_SIZE(trans->txqs.txq); i++) { - if (!trans->txqs.txq[i]) - continue; - - iwl_txq_gen2_free(trans, i); - } -} - -int iwl_txq_gen2_init(struct iwl_trans *trans, int txq_id, int queue_size) -{ - struct iwl_txq *queue; - int ret; - - /* alloc and init the tx queue */ - if (!trans->txqs.txq[txq_id]) { - queue = kzalloc(sizeof(*queue), GFP_KERNEL); - if (!queue) { - IWL_ERR(trans, "Not enough memory for tx queue\n"); - return -ENOMEM; - } - trans->txqs.txq[txq_id] = queue; - ret = iwl_txq_alloc(trans, queue, queue_size, true); - if (ret) { - IWL_ERR(trans, "Tx %d queue init failed\n", txq_id); - goto error; - } - } else { - queue = trans->txqs.txq[txq_id]; - } - - ret = iwl_txq_init(trans, queue, queue_size, - (txq_id == trans->txqs.cmd.q_id)); - if (ret) { - IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id); - goto error; - } - trans->txqs.txq[txq_id]->id = txq_id; - set_bit(txq_id, trans->txqs.queue_used); - - return 0; - -error: - iwl_txq_gen2_tx_free(trans); - return ret; -} - -static inline dma_addr_t iwl_txq_gen1_tfd_tb_get_addr(struct iwl_trans *trans, - struct iwl_tfd *tfd, u8 idx) -{ - struct iwl_tfd_tb *tb = &tfd->tbs[idx]; - dma_addr_t addr; - dma_addr_t hi_len; - - addr = get_unaligned_le32(&tb->lo); - - if (sizeof(dma_addr_t) <= sizeof(u32)) - return addr; - - hi_len = le16_to_cpu(tb->hi_n_len) & 0xF; - - /* - * shift by 16 twice to avoid warnings on 32-bit - * (where this code never runs anyway due to the - * if statement above) - */ - return addr | ((hi_len << 16) << 16); -} - -void iwl_txq_gen1_tfd_unmap(struct iwl_trans *trans, - struct iwl_cmd_meta *meta, - struct iwl_txq *txq, int index) -{ - int i, num_tbs; - struct iwl_tfd *tfd = iwl_txq_get_tfd(trans, txq, index); - - /* Sanity check on number of chunks */ - num_tbs = iwl_txq_gen1_tfd_get_num_tbs(trans, tfd); - - if (num_tbs > trans->txqs.tfd.max_tbs) { - IWL_ERR(trans, "Too many chunks: %i\n", num_tbs); - /* @todo issue fatal error, it is quite serious situation */ - return; - } - - /* first TB is never freed - it's the bidirectional DMA data */ - - for (i = 1; i < num_tbs; i++) { - if (meta->tbs & BIT(i)) - dma_unmap_page(trans->dev, - iwl_txq_gen1_tfd_tb_get_addr(trans, - tfd, i), - iwl_txq_gen1_tfd_tb_get_len(trans, - tfd, i), - DMA_TO_DEVICE); - else - dma_unmap_single(trans->dev, - iwl_txq_gen1_tfd_tb_get_addr(trans, - tfd, i), - iwl_txq_gen1_tfd_tb_get_len(trans, - tfd, i), - DMA_TO_DEVICE); - } - - meta->tbs = 0; - - iwl_txq_set_tfd_invalid_gen1(trans, tfd); -} - -#define IWL_TX_CRC_SIZE 4 -#define IWL_TX_DELIMITER_SIZE 4 - -/* - * iwl_txq_gen1_update_byte_cnt_tbl - Set up entry in Tx byte-count array - */ -void iwl_txq_gen1_update_byte_cnt_tbl(struct iwl_trans *trans, - struct iwl_txq *txq, u16 byte_cnt, - int num_tbs) -{ - struct iwlagn_scd_bc_tbl *scd_bc_tbl; - int write_ptr = txq->write_ptr; - int txq_id = txq->id; - u8 sec_ctl = 0; - u16 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE; - __le16 bc_ent; - struct iwl_device_tx_cmd *dev_cmd = txq->entries[txq->write_ptr].cmd; - struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; - u8 sta_id = tx_cmd->sta_id; - - scd_bc_tbl = trans->txqs.scd_bc_tbls.addr; - - sec_ctl = tx_cmd->sec_ctl; - - switch (sec_ctl & TX_CMD_SEC_MSK) { - case TX_CMD_SEC_CCM: - len += IEEE80211_CCMP_MIC_LEN; - break; - case TX_CMD_SEC_TKIP: - len += IEEE80211_TKIP_ICV_LEN; - break; - case TX_CMD_SEC_WEP: - len += IEEE80211_WEP_IV_LEN + IEEE80211_WEP_ICV_LEN; - break; - } - if (trans->txqs.bc_table_dword) - len = DIV_ROUND_UP(len, 4); - - if (WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX)) - return; - - bc_ent = cpu_to_le16(len | (sta_id << 12)); - - scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent; - - if (write_ptr < TFD_QUEUE_SIZE_BC_DUP) - scd_bc_tbl[txq_id].tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = - bc_ent; -} - -void iwl_txq_gen1_inval_byte_cnt_tbl(struct iwl_trans *trans, - struct iwl_txq *txq) -{ - struct iwlagn_scd_bc_tbl *scd_bc_tbl = trans->txqs.scd_bc_tbls.addr; - int txq_id = txq->id; - int read_ptr = txq->read_ptr; - u8 sta_id = 0; - __le16 bc_ent; - struct iwl_device_tx_cmd *dev_cmd = txq->entries[read_ptr].cmd; - struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; - - WARN_ON(read_ptr >= TFD_QUEUE_SIZE_MAX); - - if (txq_id != trans->txqs.cmd.q_id) - sta_id = tx_cmd->sta_id; - - bc_ent = cpu_to_le16(1 | (sta_id << 12)); - - scd_bc_tbl[txq_id].tfd_offset[read_ptr] = bc_ent; - - if (read_ptr < TFD_QUEUE_SIZE_BC_DUP) - scd_bc_tbl[txq_id].tfd_offset[TFD_QUEUE_SIZE_MAX + read_ptr] = - bc_ent; -} - -/* - * iwl_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] - * @trans - transport private data - * @txq - tx queue - * @dma_dir - the direction of the DMA mapping - * - * Does NOT advance any TFD circular buffer read/write indexes - * Does NOT free the TFD itself (which is within circular buffer) - */ -void iwl_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq) -{ - /* rd_ptr is bounded by TFD_QUEUE_SIZE_MAX and - * idx is bounded by n_window - */ - int rd_ptr = txq->read_ptr; - int idx = iwl_txq_get_cmd_index(txq, rd_ptr); - struct sk_buff *skb; - - lockdep_assert_held(&txq->lock); - - if (!txq->entries) - return; - - /* We have only q->n_window txq->entries, but we use - * TFD_QUEUE_SIZE_MAX tfds - */ - if (trans->trans_cfg->gen2) - iwl_txq_gen2_tfd_unmap(trans, &txq->entries[idx].meta, - iwl_txq_get_tfd(trans, txq, rd_ptr)); - else - iwl_txq_gen1_tfd_unmap(trans, &txq->entries[idx].meta, - txq, rd_ptr); - - /* free SKB */ - skb = txq->entries[idx].skb; - - /* Can be called from irqs-disabled context - * If skb is not NULL, it means that the whole queue is being - * freed and that the queue is not empty - free the skb - */ - if (skb) { - iwl_op_mode_free_skb(trans->op_mode, skb); - txq->entries[idx].skb = NULL; - } -} - -void iwl_txq_progress(struct iwl_txq *txq) -{ - lockdep_assert_held(&txq->lock); - - if (!txq->wd_timeout) - return; - - /* - * station is asleep and we send data - that must - * be uAPSD or PS-Poll. Don't rearm the timer. - */ - if (txq->frozen) - return; - - /* - * if empty delete timer, otherwise move timer forward - * since we're making progress on this queue - */ - if (txq->read_ptr == txq->write_ptr) - del_timer(&txq->stuck_timer); - else - mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout); -} - -/* Frees buffers until index _not_ inclusive */ -void iwl_txq_reclaim(struct iwl_trans *trans, int txq_id, int ssn, - struct sk_buff_head *skbs, bool is_flush) -{ - struct iwl_txq *txq = trans->txqs.txq[txq_id]; - int tfd_num, read_ptr, last_to_free; - - /* This function is not meant to release cmd queue*/ - if (WARN_ON(txq_id == trans->txqs.cmd.q_id)) - return; - - if (WARN_ON(!txq)) - return; - - tfd_num = iwl_txq_get_cmd_index(txq, ssn); - - spin_lock_bh(&txq->lock); - read_ptr = iwl_txq_get_cmd_index(txq, txq->read_ptr); - - if (!test_bit(txq_id, trans->txqs.queue_used)) { - IWL_DEBUG_TX_QUEUES(trans, "Q %d inactive - ignoring idx %d\n", - txq_id, ssn); - goto out; - } - - if (read_ptr == tfd_num) - goto out; - - IWL_DEBUG_TX_REPLY(trans, "[Q %d] %d (%d) -> %d (%d)\n", - txq_id, read_ptr, txq->read_ptr, tfd_num, ssn); - - /*Since we free until index _not_ inclusive, the one before index is - * the last we will free. This one must be used */ - last_to_free = iwl_txq_dec_wrap(trans, tfd_num); - - if (!iwl_txq_used(txq, last_to_free)) { - IWL_ERR(trans, - "%s: Read index for txq id (%d), last_to_free %d is out of range [0-%d] %d %d.\n", - __func__, txq_id, last_to_free, - trans->trans_cfg->base_params->max_tfd_queue_size, - txq->write_ptr, txq->read_ptr); - - iwl_op_mode_time_point(trans->op_mode, - IWL_FW_INI_TIME_POINT_FAKE_TX, - NULL); - goto out; - } - - if (WARN_ON(!skb_queue_empty(skbs))) - goto out; - - for (; - read_ptr != tfd_num; - txq->read_ptr = iwl_txq_inc_wrap(trans, txq->read_ptr), - read_ptr = iwl_txq_get_cmd_index(txq, txq->read_ptr)) { - struct sk_buff *skb = txq->entries[read_ptr].skb; - - if (WARN_ONCE(!skb, "no SKB at %d (%d) on queue %d\n", - read_ptr, txq->read_ptr, txq_id)) - continue; - - iwl_txq_free_tso_page(trans, skb); - - __skb_queue_tail(skbs, skb); - - txq->entries[read_ptr].skb = NULL; - - if (!trans->trans_cfg->gen2) - iwl_txq_gen1_inval_byte_cnt_tbl(trans, txq); - - iwl_txq_free_tfd(trans, txq); - } - - iwl_txq_progress(txq); - - if (iwl_txq_space(trans, txq) > txq->low_mark && - test_bit(txq_id, trans->txqs.queue_stopped)) { - struct sk_buff_head overflow_skbs; - struct sk_buff *skb; - - __skb_queue_head_init(&overflow_skbs); - skb_queue_splice_init(&txq->overflow_q, - is_flush ? skbs : &overflow_skbs); - - /* - * We are going to transmit from the overflow queue. - * Remember this state so that wait_for_txq_empty will know we - * are adding more packets to the TFD queue. It cannot rely on - * the state of &txq->overflow_q, as we just emptied it, but - * haven't TXed the content yet. - */ - txq->overflow_tx = true; - - /* - * This is tricky: we are in reclaim path which is non - * re-entrant, so noone will try to take the access the - * txq data from that path. We stopped tx, so we can't - * have tx as well. Bottom line, we can unlock and re-lock - * later. - */ - spin_unlock_bh(&txq->lock); - - while ((skb = __skb_dequeue(&overflow_skbs))) { - struct iwl_device_tx_cmd *dev_cmd_ptr; - - dev_cmd_ptr = *(void **)((u8 *)skb->cb + - trans->txqs.dev_cmd_offs); - - /* - * Note that we can very well be overflowing again. - * In that case, iwl_txq_space will be small again - * and we won't wake mac80211's queue. - */ - iwl_trans_tx(trans, skb, dev_cmd_ptr, txq_id); - } - - if (iwl_txq_space(trans, txq) > txq->low_mark) - iwl_wake_queue(trans, txq); - - spin_lock_bh(&txq->lock); - txq->overflow_tx = false; - } - -out: - spin_unlock_bh(&txq->lock); -} - -/* Set wr_ptr of specific device and txq */ -void iwl_txq_set_q_ptrs(struct iwl_trans *trans, int txq_id, int ptr) -{ - struct iwl_txq *txq = trans->txqs.txq[txq_id]; - - spin_lock_bh(&txq->lock); - - txq->write_ptr = ptr; - txq->read_ptr = txq->write_ptr; - - spin_unlock_bh(&txq->lock); -} - -void iwl_trans_txq_freeze_timer(struct iwl_trans *trans, unsigned long txqs, - bool freeze) -{ - int queue; - - for_each_set_bit(queue, &txqs, BITS_PER_LONG) { - struct iwl_txq *txq = trans->txqs.txq[queue]; - unsigned long now; - - spin_lock_bh(&txq->lock); - - now = jiffies; - - if (txq->frozen == freeze) - goto next_queue; - - IWL_DEBUG_TX_QUEUES(trans, "%s TXQ %d\n", - freeze ? "Freezing" : "Waking", queue); - - txq->frozen = freeze; - - if (txq->read_ptr == txq->write_ptr) - goto next_queue; - - if (freeze) { - if (unlikely(time_after(now, - txq->stuck_timer.expires))) { - /* - * The timer should have fired, maybe it is - * spinning right now on the lock. - */ - goto next_queue; - } - /* remember how long until the timer fires */ - txq->frozen_expiry_remainder = - txq->stuck_timer.expires - now; - del_timer(&txq->stuck_timer); - goto next_queue; - } - - /* - * Wake a non-empty queue -> arm timer with the - * remainder before it froze - */ - mod_timer(&txq->stuck_timer, - now + txq->frozen_expiry_remainder); - -next_queue: - spin_unlock_bh(&txq->lock); - } -} - -#define HOST_COMPLETE_TIMEOUT (2 * HZ) - -static int iwl_trans_txq_send_hcmd_sync(struct iwl_trans *trans, - struct iwl_host_cmd *cmd) -{ - const char *cmd_str = iwl_get_cmd_string(trans, cmd->id); - struct iwl_txq *txq = trans->txqs.txq[trans->txqs.cmd.q_id]; - int cmd_idx; - int ret; - - IWL_DEBUG_INFO(trans, "Attempting to send sync command %s\n", cmd_str); - - if (WARN(test_and_set_bit(STATUS_SYNC_HCMD_ACTIVE, - &trans->status), - "Command %s: a command is already active!\n", cmd_str)) - return -EIO; - - IWL_DEBUG_INFO(trans, "Setting HCMD_ACTIVE for command %s\n", cmd_str); - - cmd_idx = trans->ops->send_cmd(trans, cmd); - if (cmd_idx < 0) { - ret = cmd_idx; - clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); - IWL_ERR(trans, "Error sending %s: enqueue_hcmd failed: %d\n", - cmd_str, ret); - return ret; - } - - ret = wait_event_timeout(trans->wait_command_queue, - !test_bit(STATUS_SYNC_HCMD_ACTIVE, - &trans->status), - HOST_COMPLETE_TIMEOUT); - if (!ret) { - IWL_ERR(trans, "Error sending %s: time out after %dms.\n", - cmd_str, jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); - - IWL_ERR(trans, "Current CMD queue read_ptr %d write_ptr %d\n", - txq->read_ptr, txq->write_ptr); - - clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); - IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n", - cmd_str); - ret = -ETIMEDOUT; - - iwl_trans_sync_nmi(trans); - goto cancel; - } - - if (test_bit(STATUS_FW_ERROR, &trans->status)) { - if (!test_and_clear_bit(STATUS_SUPPRESS_CMD_ERROR_ONCE, - &trans->status)) { - IWL_ERR(trans, "FW error in SYNC CMD %s\n", cmd_str); - dump_stack(); - } - ret = -EIO; - goto cancel; - } - - if (!(cmd->flags & CMD_SEND_IN_RFKILL) && - test_bit(STATUS_RFKILL_OPMODE, &trans->status)) { - IWL_DEBUG_RF_KILL(trans, "RFKILL in SYNC CMD... no rsp\n"); - ret = -ERFKILL; - goto cancel; - } - - if ((cmd->flags & CMD_WANT_SKB) && !cmd->resp_pkt) { - IWL_ERR(trans, "Error: Response NULL in '%s'\n", cmd_str); - ret = -EIO; - goto cancel; - } - - return 0; - -cancel: - if (cmd->flags & CMD_WANT_SKB) { - /* - * Cancel the CMD_WANT_SKB flag for the cmd in the - * TX cmd queue. Otherwise in case the cmd comes - * in later, it will possibly set an invalid - * address (cmd->meta.source). - */ - txq->entries[cmd_idx].meta.flags &= ~CMD_WANT_SKB; - } - - if (cmd->resp_pkt) { - iwl_free_resp(cmd); - cmd->resp_pkt = NULL; - } - - return ret; -} - -int iwl_trans_txq_send_hcmd(struct iwl_trans *trans, - struct iwl_host_cmd *cmd) -{ - /* Make sure the NIC is still alive in the bus */ - if (test_bit(STATUS_TRANS_DEAD, &trans->status)) - return -ENODEV; - - if (!(cmd->flags & CMD_SEND_IN_RFKILL) && - test_bit(STATUS_RFKILL_OPMODE, &trans->status)) { - IWL_DEBUG_RF_KILL(trans, "Dropping CMD 0x%x: RF KILL\n", - cmd->id); - return -ERFKILL; - } - - if (unlikely(trans->system_pm_mode == IWL_PLAT_PM_MODE_D3 && - !(cmd->flags & CMD_SEND_IN_D3))) { - IWL_DEBUG_WOWLAN(trans, "Dropping CMD 0x%x: D3\n", cmd->id); - return -EHOSTDOWN; - } - - if (cmd->flags & CMD_ASYNC) { - int ret; - - /* An asynchronous command can not expect an SKB to be set. */ - if (WARN_ON(cmd->flags & CMD_WANT_SKB)) - return -EINVAL; - - ret = trans->ops->send_cmd(trans, cmd); - if (ret < 0) { - IWL_ERR(trans, - "Error sending %s: enqueue_hcmd failed: %d\n", - iwl_get_cmd_string(trans, cmd->id), ret); - return ret; - } - return 0; - } - - return iwl_trans_txq_send_hcmd_sync(trans, cmd); -} - diff --git a/drivers/net/wireless/intel/iwlwifi/queue/tx.h b/drivers/net/wireless/intel/iwlwifi/queue/tx.h deleted file mode 100644 index 124b29aac4a1..000000000000 --- a/drivers/net/wireless/intel/iwlwifi/queue/tx.h +++ /dev/null @@ -1,191 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ -/* - * Copyright (C) 2020-2023 Intel Corporation - */ -#ifndef __iwl_trans_queue_tx_h__ -#define __iwl_trans_queue_tx_h__ -#include "iwl-fh.h" -#include "fw/api/tx.h" - -struct iwl_tso_hdr_page { - struct page *page; - u8 *pos; -}; - -static inline dma_addr_t -iwl_txq_get_first_tb_dma(struct iwl_txq *txq, int idx) -{ - return txq->first_tb_dma + - sizeof(struct iwl_pcie_first_tb_buf) * idx; -} - -static inline u16 iwl_txq_get_cmd_index(const struct iwl_txq *q, u32 index) -{ - return index & (q->n_window - 1); -} - -void iwl_txq_gen2_unmap(struct iwl_trans *trans, int txq_id); - -static inline void iwl_wake_queue(struct iwl_trans *trans, - struct iwl_txq *txq) -{ - if (test_and_clear_bit(txq->id, trans->txqs.queue_stopped)) { - IWL_DEBUG_TX_QUEUES(trans, "Wake hwq %d\n", txq->id); - iwl_op_mode_queue_not_full(trans->op_mode, txq->id); - } -} - -static inline void *iwl_txq_get_tfd(struct iwl_trans *trans, - struct iwl_txq *txq, int idx) -{ - if (trans->trans_cfg->gen2) - idx = iwl_txq_get_cmd_index(txq, idx); - - return (u8 *)txq->tfds + trans->txqs.tfd.size * idx; -} - -int iwl_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num, - bool cmd_queue); -/* - * We need this inline in case dma_addr_t is only 32-bits - since the - * hardware is always 64-bit, the issue can still occur in that case, - * so use u64 for 'phys' here to force the addition in 64-bit. - */ -static inline bool iwl_txq_crosses_4g_boundary(u64 phys, u16 len) -{ - return upper_32_bits(phys) != upper_32_bits(phys + len); -} - -int iwl_txq_space(struct iwl_trans *trans, const struct iwl_txq *q); - -static inline void iwl_txq_stop(struct iwl_trans *trans, struct iwl_txq *txq) -{ - if (!test_and_set_bit(txq->id, trans->txqs.queue_stopped)) { - iwl_op_mode_queue_full(trans->op_mode, txq->id); - IWL_DEBUG_TX_QUEUES(trans, "Stop hwq %d\n", txq->id); - } else { - IWL_DEBUG_TX_QUEUES(trans, "hwq %d already stopped\n", - txq->id); - } -} - -/** - * iwl_txq_inc_wrap - increment queue index, wrap back to beginning - * @trans: the transport (for configuration data) - * @index: current index - */ -static inline int iwl_txq_inc_wrap(struct iwl_trans *trans, int index) -{ - return ++index & - (trans->trans_cfg->base_params->max_tfd_queue_size - 1); -} - -/** - * iwl_txq_dec_wrap - decrement queue index, wrap back to end - * @trans: the transport (for configuration data) - * @index: current index - */ -static inline int iwl_txq_dec_wrap(struct iwl_trans *trans, int index) -{ - return --index & - (trans->trans_cfg->base_params->max_tfd_queue_size - 1); -} - -static inline bool iwl_txq_used(const struct iwl_txq *q, int i) -{ - int index = iwl_txq_get_cmd_index(q, i); - int r = iwl_txq_get_cmd_index(q, q->read_ptr); - int w = iwl_txq_get_cmd_index(q, q->write_ptr); - - return w >= r ? - (index >= r && index < w) : - !(index < r && index >= w); -} - -void iwl_txq_free_tso_page(struct iwl_trans *trans, struct sk_buff *skb); - -void iwl_txq_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq); - -int iwl_txq_gen2_set_tb(struct iwl_trans *trans, - struct iwl_tfh_tfd *tfd, dma_addr_t addr, - u16 len); - -void iwl_txq_gen2_tfd_unmap(struct iwl_trans *trans, - struct iwl_cmd_meta *meta, - struct iwl_tfh_tfd *tfd); - -int iwl_txq_dyn_alloc(struct iwl_trans *trans, u32 flags, - u32 sta_mask, u8 tid, - int size, unsigned int timeout); - -int iwl_txq_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb, - struct iwl_device_tx_cmd *dev_cmd, int txq_id); - -void iwl_txq_dyn_free(struct iwl_trans *trans, int queue); -void iwl_txq_gen2_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq); -void iwl_txq_inc_wr_ptr(struct iwl_trans *trans, struct iwl_txq *txq); -void iwl_txq_gen2_tx_free(struct iwl_trans *trans); -int iwl_txq_init(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num, - bool cmd_queue); -int iwl_txq_gen2_init(struct iwl_trans *trans, int txq_id, int queue_size); -#ifdef CONFIG_INET -struct iwl_tso_hdr_page *get_page_hdr(struct iwl_trans *trans, size_t len, - struct sk_buff *skb); -#endif -static inline u8 iwl_txq_gen1_tfd_get_num_tbs(struct iwl_trans *trans, - struct iwl_tfd *tfd) -{ - return tfd->num_tbs & 0x1f; -} - -static inline u16 iwl_txq_gen1_tfd_tb_get_len(struct iwl_trans *trans, - void *_tfd, u8 idx) -{ - struct iwl_tfd *tfd; - struct iwl_tfd_tb *tb; - - if (trans->trans_cfg->gen2) { - struct iwl_tfh_tfd *tfh_tfd = _tfd; - struct iwl_tfh_tb *tfh_tb = &tfh_tfd->tbs[idx]; - - return le16_to_cpu(tfh_tb->tb_len); - } - - tfd = (struct iwl_tfd *)_tfd; - tb = &tfd->tbs[idx]; - - return le16_to_cpu(tb->hi_n_len) >> 4; -} - -static inline void iwl_pcie_gen1_tfd_set_tb(struct iwl_trans *trans, - struct iwl_tfd *tfd, - u8 idx, dma_addr_t addr, u16 len) -{ - struct iwl_tfd_tb *tb = &tfd->tbs[idx]; - u16 hi_n_len = len << 4; - - put_unaligned_le32(addr, &tb->lo); - hi_n_len |= iwl_get_dma_hi_addr(addr); - - tb->hi_n_len = cpu_to_le16(hi_n_len); - - tfd->num_tbs = idx + 1; -} - -void iwl_txq_gen1_tfd_unmap(struct iwl_trans *trans, - struct iwl_cmd_meta *meta, - struct iwl_txq *txq, int index); -void iwl_txq_gen1_inval_byte_cnt_tbl(struct iwl_trans *trans, - struct iwl_txq *txq); -void iwl_txq_gen1_update_byte_cnt_tbl(struct iwl_trans *trans, - struct iwl_txq *txq, u16 byte_cnt, - int num_tbs); -void iwl_txq_reclaim(struct iwl_trans *trans, int txq_id, int ssn, - struct sk_buff_head *skbs, bool is_flush); -void iwl_txq_set_q_ptrs(struct iwl_trans *trans, int txq_id, int ptr); -void iwl_trans_txq_freeze_timer(struct iwl_trans *trans, unsigned long txqs, - bool freeze); -void iwl_txq_progress(struct iwl_txq *txq); -void iwl_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq); -int iwl_trans_txq_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd); -#endif /* __iwl_trans_queue_tx_h__ */ |