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path: root/drivers/net/wireless/iwlwifi/pcie
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/pcie')
-rw-r--r--drivers/net/wireless/iwlwifi/pcie/drv.c30
-rw-r--r--drivers/net/wireless/iwlwifi/pcie/internal.h1
-rw-r--r--drivers/net/wireless/iwlwifi/pcie/rx.c45
-rw-r--r--drivers/net/wireless/iwlwifi/pcie/trans.c144
-rw-r--r--drivers/net/wireless/iwlwifi/pcie/tx.c60
5 files changed, 97 insertions, 183 deletions
diff --git a/drivers/net/wireless/iwlwifi/pcie/drv.c b/drivers/net/wireless/iwlwifi/pcie/drv.c
index ff13458efc27..dc02cb9792af 100644
--- a/drivers/net/wireless/iwlwifi/pcie/drv.c
+++ b/drivers/net/wireless/iwlwifi/pcie/drv.c
@@ -273,9 +273,9 @@ static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
{IWL_PCI_DEVICE(0x08B1, 0x4462, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4870, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x486E, iwl7260_2ac_cfg)},
- {IWL_PCI_DEVICE(0x08B1, 0x4A70, iwl7260_2ac_cfg)},
- {IWL_PCI_DEVICE(0x08B1, 0x4A6E, iwl7260_2ac_cfg)},
- {IWL_PCI_DEVICE(0x08B1, 0x4A6C, iwl7260_2ac_cfg)},
+ {IWL_PCI_DEVICE(0x08B1, 0x4A70, iwl7260_2ac_cfg_high_temp)},
+ {IWL_PCI_DEVICE(0x08B1, 0x4A6E, iwl7260_2ac_cfg_high_temp)},
+ {IWL_PCI_DEVICE(0x08B1, 0x4A6C, iwl7260_2ac_cfg_high_temp)},
{IWL_PCI_DEVICE(0x08B1, 0x4020, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x4220, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4420, iwl7260_2n_cfg)},
@@ -325,15 +325,15 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
int ret;
iwl_trans = iwl_trans_pcie_alloc(pdev, ent, cfg);
- if (iwl_trans == NULL)
- return -ENOMEM;
+ if (IS_ERR(iwl_trans))
+ return PTR_ERR(iwl_trans);
pci_set_drvdata(pdev, iwl_trans);
trans_pcie = IWL_TRANS_GET_PCIE_TRANS(iwl_trans);
trans_pcie->drv = iwl_drv_start(iwl_trans, cfg);
- if (IS_ERR_OR_NULL(trans_pcie->drv)) {
+ if (IS_ERR(trans_pcie->drv)) {
ret = PTR_ERR(trans_pcie->drv);
goto out_free_trans;
}
@@ -368,21 +368,19 @@ static void iwl_pci_remove(struct pci_dev *pdev)
static int iwl_pci_suspend(struct device *device)
{
- struct pci_dev *pdev = to_pci_dev(device);
- struct iwl_trans *iwl_trans = pci_get_drvdata(pdev);
-
/* Before you put code here, think about WoWLAN. You cannot check here
* whether WoWLAN is enabled or not, and your code will run even if
* WoWLAN is enabled - don't kill the NIC, someone may need it in Sx.
*/
- return iwl_trans_suspend(iwl_trans);
+ return 0;
}
static int iwl_pci_resume(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
- struct iwl_trans *iwl_trans = pci_get_drvdata(pdev);
+ struct iwl_trans *trans = pci_get_drvdata(pdev);
+ bool hw_rfkill;
/* Before you put code here, think about WoWLAN. You cannot check here
* whether WoWLAN is enabled or not, and your code will run even if
@@ -395,7 +393,15 @@ static int iwl_pci_resume(struct device *device)
*/
pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
- return iwl_trans_resume(iwl_trans);
+ if (!trans->op_mode)
+ return 0;
+
+ iwl_enable_rfkill_int(trans);
+
+ hw_rfkill = iwl_is_rfkill_set(trans);
+ iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill);
+
+ return 0;
}
static SIMPLE_DEV_PM_OPS(iwl_dev_pm_ops, iwl_pci_suspend, iwl_pci_resume);
diff --git a/drivers/net/wireless/iwlwifi/pcie/internal.h b/drivers/net/wireless/iwlwifi/pcie/internal.h
index b654dcdd048a..fa22639b63c9 100644
--- a/drivers/net/wireless/iwlwifi/pcie/internal.h
+++ b/drivers/net/wireless/iwlwifi/pcie/internal.h
@@ -392,7 +392,6 @@ void iwl_trans_pcie_tx_reset(struct iwl_trans *trans);
/*****************************************************
* Error handling
******************************************************/
-int iwl_pcie_dump_fh(struct iwl_trans *trans, char **buf);
void iwl_pcie_dump_csr(struct iwl_trans *trans);
/*****************************************************
diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c
index fd848cd1583e..3f237b42eb36 100644
--- a/drivers/net/wireless/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/rx.c
@@ -112,15 +112,16 @@
*/
static int iwl_rxq_space(const struct iwl_rxq *rxq)
{
- int s = rxq->read - rxq->write;
-
- if (s <= 0)
- s += RX_QUEUE_SIZE;
- /* keep some buffer to not confuse full and empty queue */
- s -= 2;
- if (s < 0)
- s = 0;
- return s;
+ /* Make sure RX_QUEUE_SIZE is a power of 2 */
+ BUILD_BUG_ON(RX_QUEUE_SIZE & (RX_QUEUE_SIZE - 1));
+
+ /*
+ * There can be up to (RX_QUEUE_SIZE - 1) free slots, to avoid ambiguity
+ * between empty and completely full queues.
+ * The following is equivalent to modulo by RX_QUEUE_SIZE and is well
+ * defined for negative dividends.
+ */
+ return (rxq->read - rxq->write - 1) & (RX_QUEUE_SIZE - 1);
}
/*
@@ -793,7 +794,7 @@ static void iwl_pcie_irq_handle_error(struct iwl_trans *trans)
}
iwl_pcie_dump_csr(trans);
- iwl_pcie_dump_fh(trans, NULL);
+ iwl_dump_fh(trans, NULL);
set_bit(STATUS_FW_ERROR, &trans_pcie->status);
clear_bit(STATUS_HCMD_ACTIVE, &trans_pcie->status);
@@ -1120,6 +1121,7 @@ static irqreturn_t iwl_pcie_isr(int irq, void *data)
struct iwl_trans *trans = data;
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
u32 inta, inta_mask;
+ irqreturn_t ret = IRQ_NONE;
lockdep_assert_held(&trans_pcie->irq_lock);
@@ -1168,10 +1170,8 @@ static irqreturn_t iwl_pcie_isr(int irq, void *data)
/* the thread will service interrupts and re-enable them */
if (likely(inta))
return IRQ_WAKE_THREAD;
- else if (test_bit(STATUS_INT_ENABLED, &trans_pcie->status) &&
- !trans_pcie->inta)
- iwl_enable_interrupts(trans);
- return IRQ_HANDLED;
+
+ ret = IRQ_HANDLED;
none:
/* re-enable interrupts here since we don't have anything to service. */
@@ -1180,7 +1180,7 @@ none:
!trans_pcie->inta)
iwl_enable_interrupts(trans);
- return IRQ_NONE;
+ return ret;
}
/* interrupt handler using ict table, with this interrupt driver will
@@ -1199,6 +1199,7 @@ irqreturn_t iwl_pcie_isr_ict(int irq, void *data)
u32 val = 0;
u32 read;
unsigned long flags;
+ irqreturn_t ret = IRQ_NONE;
if (!trans)
return IRQ_NONE;
@@ -1211,7 +1212,7 @@ irqreturn_t iwl_pcie_isr_ict(int irq, void *data)
* use legacy interrupt.
*/
if (unlikely(!trans_pcie->use_ict)) {
- irqreturn_t ret = iwl_pcie_isr(irq, data);
+ ret = iwl_pcie_isr(irq, data);
spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
return ret;
}
@@ -1280,17 +1281,9 @@ irqreturn_t iwl_pcie_isr_ict(int irq, void *data)
if (likely(inta)) {
spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
return IRQ_WAKE_THREAD;
- } else if (test_bit(STATUS_INT_ENABLED, &trans_pcie->status) &&
- !trans_pcie->inta) {
- /* Allow interrupt if was disabled by this handler and
- * no tasklet was schedules, We should not enable interrupt,
- * tasklet will enable it.
- */
- iwl_enable_interrupts(trans);
}
- spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
- return IRQ_HANDLED;
+ ret = IRQ_HANDLED;
none:
/* re-enable interrupts here since we don't have anything to service.
@@ -1301,5 +1294,5 @@ irqreturn_t iwl_pcie_isr_ict(int irq, void *data)
iwl_enable_interrupts(trans);
spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
- return IRQ_NONE;
+ return ret;
}
diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 390e2f058aff..bad95d28d50d 100644
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -820,25 +820,6 @@ static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
clear_bit(STATUS_TPOWER_PMI, &trans_pcie->status);
}
-#ifdef CONFIG_PM_SLEEP
-static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
-{
- return 0;
-}
-
-static int iwl_trans_pcie_resume(struct iwl_trans *trans)
-{
- bool hw_rfkill;
-
- iwl_enable_rfkill_int(trans);
-
- hw_rfkill = iwl_is_rfkill_set(trans);
- iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill);
-
- return 0;
-}
-#endif /* CONFIG_PM_SLEEP */
-
static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans, bool silent,
unsigned long *flags)
{
@@ -1038,71 +1019,6 @@ static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
}
-static const char *get_fh_string(int cmd)
-{
-#define IWL_CMD(x) case x: return #x
- switch (cmd) {
- IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
- IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
- IWL_CMD(FH_RSCSR_CHNL0_WPTR);
- IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
- IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
- IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
- IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
- IWL_CMD(FH_TSSR_TX_STATUS_REG);
- IWL_CMD(FH_TSSR_TX_ERROR_REG);
- default:
- return "UNKNOWN";
- }
-#undef IWL_CMD
-}
-
-int iwl_pcie_dump_fh(struct iwl_trans *trans, char **buf)
-{
- int i;
- static const u32 fh_tbl[] = {
- FH_RSCSR_CHNL0_STTS_WPTR_REG,
- FH_RSCSR_CHNL0_RBDCB_BASE_REG,
- FH_RSCSR_CHNL0_WPTR,
- FH_MEM_RCSR_CHNL0_CONFIG_REG,
- FH_MEM_RSSR_SHARED_CTRL_REG,
- FH_MEM_RSSR_RX_STATUS_REG,
- FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
- FH_TSSR_TX_STATUS_REG,
- FH_TSSR_TX_ERROR_REG
- };
-
-#ifdef CONFIG_IWLWIFI_DEBUGFS
- if (buf) {
- int pos = 0;
- size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
-
- *buf = kmalloc(bufsz, GFP_KERNEL);
- if (!*buf)
- return -ENOMEM;
-
- pos += scnprintf(*buf + pos, bufsz - pos,
- "FH register values:\n");
-
- for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
- pos += scnprintf(*buf + pos, bufsz - pos,
- " %34s: 0X%08x\n",
- get_fh_string(fh_tbl[i]),
- iwl_read_direct32(trans, fh_tbl[i]));
-
- return pos;
- }
-#endif
-
- IWL_ERR(trans, "FH register values:\n");
- for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
- IWL_ERR(trans, " %34s: 0X%08x\n",
- get_fh_string(fh_tbl[i]),
- iwl_read_direct32(trans, fh_tbl[i]));
-
- return 0;
-}
-
static const char *get_csr_string(int cmd)
{
#define IWL_CMD(x) case x: return #x
@@ -1183,18 +1099,7 @@ void iwl_pcie_dump_csr(struct iwl_trans *trans)
} while (0)
/* file operation */
-#define DEBUGFS_READ_FUNC(name) \
-static ssize_t iwl_dbgfs_##name##_read(struct file *file, \
- char __user *user_buf, \
- size_t count, loff_t *ppos);
-
-#define DEBUGFS_WRITE_FUNC(name) \
-static ssize_t iwl_dbgfs_##name##_write(struct file *file, \
- const char __user *user_buf, \
- size_t count, loff_t *ppos);
-
#define DEBUGFS_READ_FILE_OPS(name) \
- DEBUGFS_READ_FUNC(name); \
static const struct file_operations iwl_dbgfs_##name##_ops = { \
.read = iwl_dbgfs_##name##_read, \
.open = simple_open, \
@@ -1202,7 +1107,6 @@ static const struct file_operations iwl_dbgfs_##name##_ops = { \
};
#define DEBUGFS_WRITE_FILE_OPS(name) \
- DEBUGFS_WRITE_FUNC(name); \
static const struct file_operations iwl_dbgfs_##name##_ops = { \
.write = iwl_dbgfs_##name##_write, \
.open = simple_open, \
@@ -1210,8 +1114,6 @@ static const struct file_operations iwl_dbgfs_##name##_ops = { \
};
#define DEBUGFS_READ_WRITE_FILE_OPS(name) \
- DEBUGFS_READ_FUNC(name); \
- DEBUGFS_WRITE_FUNC(name); \
static const struct file_operations iwl_dbgfs_##name##_ops = { \
.write = iwl_dbgfs_##name##_write, \
.read = iwl_dbgfs_##name##_read, \
@@ -1395,7 +1297,7 @@ static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
int pos = 0;
ssize_t ret = -EFAULT;
- ret = pos = iwl_pcie_dump_fh(trans, &buf);
+ ret = pos = iwl_dump_fh(trans, &buf);
if (buf) {
ret = simple_read_from_buffer(user_buf,
count, ppos, buf, pos);
@@ -1459,10 +1361,6 @@ static const struct iwl_trans_ops trans_ops_pcie = {
.wait_tx_queue_empty = iwl_trans_pcie_wait_txq_empty,
-#ifdef CONFIG_PM_SLEEP
- .suspend = iwl_trans_pcie_suspend,
- .resume = iwl_trans_pcie_resume,
-#endif
.write8 = iwl_trans_pcie_write8,
.write32 = iwl_trans_pcie_write32,
.read32 = iwl_trans_pcie_read32,
@@ -1488,9 +1386,10 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
trans = kzalloc(sizeof(struct iwl_trans) +
sizeof(struct iwl_trans_pcie), GFP_KERNEL);
-
- if (!trans)
- return NULL;
+ if (!trans) {
+ err = -ENOMEM;
+ goto out;
+ }
trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
@@ -1502,15 +1401,20 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
spin_lock_init(&trans_pcie->reg_lock);
init_waitqueue_head(&trans_pcie->ucode_write_waitq);
- if (pci_enable_device(pdev)) {
- err = -ENODEV;
- goto out_no_pci;
+ if (!cfg->base_params->pcie_l1_allowed) {
+ /*
+ * W/A - seems to solve weird behavior. We need to remove this
+ * if we don't want to stay in L1 all the time. This wastes a
+ * lot of power.
+ */
+ pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
+ PCIE_LINK_STATE_L1 |
+ PCIE_LINK_STATE_CLKPM);
}
- /* W/A - seems to solve weird behavior. We need to remove this if we
- * don't want to stay in L1 all the time. This wastes a lot of power */
- pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
- PCIE_LINK_STATE_CLKPM);
+ err = pci_enable_device(pdev);
+ if (err)
+ goto out_no_pci;
pci_set_master(pdev);
@@ -1579,17 +1483,20 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
SLAB_HWCACHE_ALIGN,
NULL);
- if (!trans->dev_cmd_pool)
+ if (!trans->dev_cmd_pool) {
+ err = -ENOMEM;
goto out_pci_disable_msi;
+ }
trans_pcie->inta_mask = CSR_INI_SET_MASK;
if (iwl_pcie_alloc_ict(trans))
goto out_free_cmd_pool;
- if (request_threaded_irq(pdev->irq, iwl_pcie_isr_ict,
- iwl_pcie_irq_handler,
- IRQF_SHARED, DRV_NAME, trans)) {
+ err = request_threaded_irq(pdev->irq, iwl_pcie_isr_ict,
+ iwl_pcie_irq_handler,
+ IRQF_SHARED, DRV_NAME, trans);
+ if (err) {
IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
goto out_free_ict;
}
@@ -1608,5 +1515,6 @@ out_pci_disable_device:
pci_disable_device(pdev);
out_no_pci:
kfree(trans);
- return NULL;
+out:
+ return ERR_PTR(err);
}
diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c b/drivers/net/wireless/iwlwifi/pcie/tx.c
index c47c92165aba..f45eb29c2ede 100644
--- a/drivers/net/wireless/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/tx.c
@@ -65,18 +65,30 @@
***************************************************/
static int iwl_queue_space(const struct iwl_queue *q)
{
- int s = q->read_ptr - q->write_ptr;
-
- if (q->read_ptr > q->write_ptr)
- s -= q->n_bd;
-
- if (s <= 0)
- s += q->n_window;
- /* keep some reserve to not confuse empty and full situations */
- s -= 2;
- if (s < 0)
- s = 0;
- return s;
+ unsigned int max;
+ unsigned int used;
+
+ /*
+ * To avoid ambiguity between empty and completely full queues, there
+ * should always be less than q->n_bd elements in the queue.
+ * If q->n_window is smaller than q->n_bd, there is no need to reserve
+ * any queue entries for this purpose.
+ */
+ if (q->n_window < q->n_bd)
+ max = q->n_window;
+ else
+ max = q->n_bd - 1;
+
+ /*
+ * q->n_bd is a power of 2, so the following is equivalent to modulo by
+ * q->n_bd and is well defined for negative dividends.
+ */
+ used = (q->write_ptr - q->read_ptr) & (q->n_bd - 1);
+
+ if (WARN_ON(used > max))
+ return 0;
+
+ return max - used;
}
/*
@@ -451,13 +463,10 @@ static int iwl_pcie_txq_build_tfd(struct iwl_trans *trans, struct iwl_txq *txq,
return -EINVAL;
}
- if (WARN_ON(addr & ~DMA_BIT_MASK(36)))
+ if (WARN(addr & ~IWL_TX_DMA_MASK,
+ "Unaligned address = %llx\n", (unsigned long long)addr))
return -EINVAL;
- if (unlikely(addr & ~IWL_TX_DMA_MASK))
- IWL_ERR(trans, "Unaligned address = %llx\n",
- (unsigned long long)addr);
-
iwl_pcie_tfd_set_tb(tfd, num_tbs, addr, len);
return 0;
@@ -829,7 +838,7 @@ static int iwl_pcie_tx_alloc(struct iwl_trans *trans)
sizeof(struct iwl_txq), GFP_KERNEL);
if (!trans_pcie->txq) {
IWL_ERR(trans, "Not enough memory for txq\n");
- ret = ENOMEM;
+ ret = -ENOMEM;
goto error;
}
@@ -1153,10 +1162,10 @@ void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int txq_id)
/*
* iwl_pcie_enqueue_hcmd - enqueue a uCode command
* @priv: device private data point
- * @cmd: a point to the ucode command structure
+ * @cmd: a pointer to the ucode command structure
*
- * The function returns < 0 values to indicate the operation is
- * failed. On success, it turns the index (> 0) of command in the
+ * The function returns < 0 values to indicate the operation
+ * failed. On success, it returns the index (>= 0) of command in the
* command queue.
*/
static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
@@ -1619,10 +1628,9 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
txq = &trans_pcie->txq[txq_id];
q = &txq->q;
- if (unlikely(!test_bit(txq_id, trans_pcie->queue_used))) {
- WARN_ON_ONCE(1);
+ if (WARN_ONCE(!test_bit(txq_id, trans_pcie->queue_used),
+ "TX on unused queue %d\n", txq_id))
return -EINVAL;
- }
spin_lock(&txq->lock);
@@ -1632,7 +1640,7 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
* Check here that the packets are in the right place on the ring.
*/
wifi_seq = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
- WARN_ONCE(trans_pcie->txq[txq_id].ampdu &&
+ WARN_ONCE(txq->ampdu &&
(wifi_seq & 0xff) != q->write_ptr,
"Q: %d WiFi Seq %d tfdNum %d",
txq_id, wifi_seq, q->write_ptr);
@@ -1664,7 +1672,7 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
*/
len = sizeof(struct iwl_tx_cmd) + sizeof(struct iwl_cmd_header) +
hdr_len - IWL_HCMD_SCRATCHBUF_SIZE;
- tb1_len = (len + 3) & ~3;
+ tb1_len = ALIGN(len, 4);
/* Tell NIC about any 2-byte padding after MAC header */
if (tb1_len != len)
generated by cgit v1.2.3 (git 2.0.4) at 2024-12-29 13:56:13 +0000