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path: root/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
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Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/tx.c')
-rw-r--r--drivers/net/wireless/intel/iwlwifi/pcie/tx.c108
1 files changed, 57 insertions, 51 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
index 93f0d387688a..87b7225fe289 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
@@ -17,10 +17,6 @@
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
- *
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
@@ -1101,7 +1097,7 @@ void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
if (!iwl_queue_used(txq, last_to_free)) {
IWL_ERR(trans,
- "%s: Read index for DMA queue txq id (%d), last_to_free %d is out of range [0-%d] %d %d.\n",
+ "%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->cfg->base_params->max_tfd_queue_size,
txq->write_ptr, txq->read_ptr);
@@ -1188,6 +1184,10 @@ static int iwl_pcie_set_cmd_in_flight(struct iwl_trans *trans,
lockdep_assert_held(&trans_pcie->reg_lock);
+ /* 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_IDLE) &&
!trans_pcie->ref_cmd_in_flight) {
trans_pcie->ref_cmd_in_flight = true;
@@ -1230,7 +1230,7 @@ static int iwl_pcie_set_cmd_in_flight(struct iwl_trans *trans,
* need to be reclaimed. As result, some free space forms. If there is
* enough free space (> low mark), wake the stack that feeds us.
*/
-static void iwl_pcie_cmdq_reclaim(struct iwl_trans *trans, int txq_id, int idx)
+void iwl_pcie_cmdq_reclaim(struct iwl_trans *trans, int txq_id, int idx)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
struct iwl_txq *txq = trans_pcie->txq[txq_id];
@@ -1912,7 +1912,7 @@ static int iwl_pcie_send_hcmd_sync(struct iwl_trans *trans,
}
if (test_bit(STATUS_FW_ERROR, &trans->status)) {
- iwl_trans_dump_regs(trans);
+ iwl_trans_pcie_dump_regs(trans);
IWL_ERR(trans, "FW error in SYNC CMD %s\n",
iwl_get_cmd_string(trans, cmd->id));
dump_stack();
@@ -1957,6 +1957,10 @@ cancel:
int iwl_trans_pcie_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",
@@ -1973,29 +1977,27 @@ int iwl_trans_pcie_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
static int iwl_fill_data_tbs(struct iwl_trans *trans, struct sk_buff *skb,
struct iwl_txq *txq, u8 hdr_len,
- struct iwl_cmd_meta *out_meta,
- struct iwl_device_cmd *dev_cmd, u16 tb1_len)
+ struct iwl_cmd_meta *out_meta)
{
- struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
- u16 tb2_len;
+ u16 head_tb_len;
int i;
/*
* Set up TFD's third entry to point directly to remainder
* of skb's head, if any
*/
- tb2_len = skb_headlen(skb) - hdr_len;
+ head_tb_len = skb_headlen(skb) - hdr_len;
- if (tb2_len > 0) {
- dma_addr_t tb2_phys = dma_map_single(trans->dev,
- skb->data + hdr_len,
- tb2_len, DMA_TO_DEVICE);
- if (unlikely(dma_mapping_error(trans->dev, tb2_phys))) {
- iwl_pcie_tfd_unmap(trans, out_meta, txq,
- txq->write_ptr);
+ if (head_tb_len > 0) {
+ dma_addr_t tb_phys = dma_map_single(trans->dev,
+ skb->data + hdr_len,
+ head_tb_len, DMA_TO_DEVICE);
+ if (unlikely(dma_mapping_error(trans->dev, tb_phys)))
return -EINVAL;
- }
- iwl_pcie_txq_build_tfd(trans, txq, tb2_phys, tb2_len, false);
+ trace_iwlwifi_dev_tx_tb(trans->dev, skb,
+ skb->data + hdr_len,
+ head_tb_len);
+ iwl_pcie_txq_build_tfd(trans, txq, tb_phys, head_tb_len, false);
}
/* set up the remaining entries to point to the data */
@@ -2010,23 +2012,19 @@ static int iwl_fill_data_tbs(struct iwl_trans *trans, struct sk_buff *skb,
tb_phys = skb_frag_dma_map(trans->dev, frag, 0,
skb_frag_size(frag), DMA_TO_DEVICE);
- if (unlikely(dma_mapping_error(trans->dev, tb_phys))) {
- iwl_pcie_tfd_unmap(trans, out_meta, txq,
- txq->write_ptr);
+ if (unlikely(dma_mapping_error(trans->dev, tb_phys)))
return -EINVAL;
- }
+ trace_iwlwifi_dev_tx_tb(trans->dev, skb,
+ skb_frag_address(frag),
+ skb_frag_size(frag));
tb_idx = iwl_pcie_txq_build_tfd(trans, txq, tb_phys,
skb_frag_size(frag), false);
+ if (tb_idx < 0)
+ return tb_idx;
out_meta->tbs |= BIT(tb_idx);
}
- trace_iwlwifi_dev_tx(trans->dev, skb,
- iwl_pcie_get_tfd(trans, txq, txq->write_ptr),
- trans_pcie->tfd_size,
- &dev_cmd->hdr, IWL_FIRST_TB_SIZE + tb1_len,
- hdr_len);
- trace_iwlwifi_dev_tx_data(trans->dev, skb, hdr_len);
return 0;
}
@@ -2087,7 +2085,6 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
u8 *start_hdr;
struct iwl_tso_hdr_page *hdr_page;
struct page **page_ptr;
- int ret;
struct tso_t tso;
/* if the packet is protected, then it must be CCMP or GCMP */
@@ -2173,10 +2170,8 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
if (trans_pcie->sw_csum_tx) {
csum_skb = alloc_skb(data_left + tcp_hdrlen(skb),
GFP_ATOMIC);
- if (!csum_skb) {
- ret = -ENOMEM;
- goto out_unmap;
- }
+ if (!csum_skb)
+ return -ENOMEM;
iwl_compute_pseudo_hdr_csum(iph, tcph,
skb->protocol ==
@@ -2197,13 +2192,12 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
hdr_tb_len, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(trans->dev, hdr_tb_phys))) {
dev_kfree_skb(csum_skb);
- ret = -EINVAL;
- goto out_unmap;
+ return -EINVAL;
}
iwl_pcie_txq_build_tfd(trans, txq, hdr_tb_phys,
hdr_tb_len, false);
- trace_iwlwifi_dev_tx_tso_chunk(trans->dev, start_hdr,
- hdr_tb_len);
+ trace_iwlwifi_dev_tx_tb(trans->dev, skb, start_hdr,
+ hdr_tb_len);
/* add this subframe's headers' length to the tx_cmd */
le16_add_cpu(&tx_cmd->len, hdr_page->pos - subf_hdrs_start);
@@ -2223,14 +2217,13 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
size, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(trans->dev, tb_phys))) {
dev_kfree_skb(csum_skb);
- ret = -EINVAL;
- goto out_unmap;
+ return -EINVAL;
}
iwl_pcie_txq_build_tfd(trans, txq, tb_phys,
size, false);
- trace_iwlwifi_dev_tx_tso_chunk(trans->dev, tso.data,
- size);
+ trace_iwlwifi_dev_tx_tb(trans->dev, skb, tso.data,
+ size);
data_left -= size;
tso_build_data(skb, &tso, size);
@@ -2258,10 +2251,6 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
skb_push(skb, hdr_len + iv_len);
return 0;
-
-out_unmap:
- iwl_pcie_tfd_unmap(trans, out_meta, txq, txq->write_ptr);
- return ret;
}
#else /* CONFIG_INET */
static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
@@ -2415,6 +2404,13 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
goto out_err;
iwl_pcie_txq_build_tfd(trans, txq, tb1_phys, tb1_len, false);
+ trace_iwlwifi_dev_tx(trans->dev, skb,
+ iwl_pcie_get_tfd(trans, txq,
+ txq->write_ptr),
+ trans_pcie->tfd_size,
+ &dev_cmd->hdr, IWL_FIRST_TB_SIZE + tb1_len,
+ hdr_len);
+
/*
* If gso_size wasn't set, don't give the frame "amsdu treatment"
* (adding subframes, etc.).
@@ -2426,9 +2422,18 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
out_meta, dev_cmd,
tb1_len)))
goto out_err;
- } else if (unlikely(iwl_fill_data_tbs(trans, skb, txq, hdr_len,
- out_meta, dev_cmd, tb1_len))) {
- goto out_err;
+ } else {
+ struct sk_buff *frag;
+
+ if (unlikely(iwl_fill_data_tbs(trans, skb, txq, hdr_len,
+ out_meta)))
+ goto out_err;
+
+ skb_walk_frags(skb, frag) {
+ if (unlikely(iwl_fill_data_tbs(trans, frag, txq, 0,
+ out_meta)))
+ goto out_err;
+ }
}
/* building the A-MSDU might have changed this data, so memcpy it now */
@@ -2473,6 +2478,7 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
spin_unlock(&txq->lock);
return 0;
out_err:
+ iwl_pcie_tfd_unmap(trans, out_meta, txq, txq->write_ptr);
spin_unlock(&txq->lock);
return -1;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.