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path: root/drivers/net/ethernet/intel/e1000e/netdev.c
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Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/netdev.c')
-rw-r--r--drivers/net/ethernet/intel/e1000e/netdev.c84
1 files changed, 49 insertions, 35 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 95b245310f1..d01a099475a 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -178,6 +178,24 @@ static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]);
}
+static void e1000e_dump_ps_pages(struct e1000_adapter *adapter,
+ struct e1000_buffer *bi)
+{
+ int i;
+ struct e1000_ps_page *ps_page;
+
+ for (i = 0; i < adapter->rx_ps_pages; i++) {
+ ps_page = &bi->ps_pages[i];
+
+ if (ps_page->page) {
+ pr_info("packet dump for ps_page %d:\n", i);
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
+ 16, 1, page_address(ps_page->page),
+ PAGE_SIZE, true);
+ }
+ }
+}
+
/*
* e1000e_dump - Print registers, Tx-ring and Rx-ring
*/
@@ -299,10 +317,10 @@ static void e1000e_dump(struct e1000_adapter *adapter)
(unsigned long long)buffer_info->time_stamp,
buffer_info->skb, next_desc);
- if (netif_msg_pktdata(adapter) && buffer_info->dma != 0)
+ if (netif_msg_pktdata(adapter) && buffer_info->skb)
print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
- 16, 1, phys_to_virt(buffer_info->dma),
- buffer_info->length, true);
+ 16, 1, buffer_info->skb->data,
+ buffer_info->skb->len, true);
}
/* Print Rx Ring Summary */
@@ -381,10 +399,8 @@ rx_ring_summary:
buffer_info->skb, next_desc);
if (netif_msg_pktdata(adapter))
- print_hex_dump(KERN_INFO, "",
- DUMP_PREFIX_ADDRESS, 16, 1,
- phys_to_virt(buffer_info->dma),
- adapter->rx_ps_bsize0, true);
+ e1000e_dump_ps_pages(adapter,
+ buffer_info);
}
}
break;
@@ -444,12 +460,12 @@ rx_ring_summary:
(unsigned long long)buffer_info->dma,
buffer_info->skb, next_desc);
- if (netif_msg_pktdata(adapter))
+ if (netif_msg_pktdata(adapter) &&
+ buffer_info->skb)
print_hex_dump(KERN_INFO, "",
DUMP_PREFIX_ADDRESS, 16,
1,
- phys_to_virt
- (buffer_info->dma),
+ buffer_info->skb->data,
adapter->rx_buffer_len,
true);
}
@@ -3501,6 +3517,15 @@ void e1000e_reset(struct e1000_adapter *adapter)
}
/*
+ * Alignment of Tx data is on an arbitrary byte boundary with the
+ * maximum size per Tx descriptor limited only to the transmit
+ * allocation of the packet buffer minus 96 bytes with an upper
+ * limit of 24KB due to receive synchronization limitations.
+ */
+ adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96,
+ 24 << 10);
+
+ /*
* Disable Adaptive Interrupt Moderation if 2 full packets cannot
* fit in receive buffer.
*/
@@ -4769,12 +4794,9 @@ static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb)
return 1;
}
-#define E1000_MAX_PER_TXD 8192
-#define E1000_MAX_TXD_PWR 12
-
static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb,
unsigned int first, unsigned int max_per_txd,
- unsigned int nr_frags, unsigned int mss)
+ unsigned int nr_frags)
{
struct e1000_adapter *adapter = tx_ring->adapter;
struct pci_dev *pdev = adapter->pdev;
@@ -5007,20 +5029,19 @@ static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
{
+ BUG_ON(size > tx_ring->count);
+
if (e1000_desc_unused(tx_ring) >= size)
return 0;
return __e1000_maybe_stop_tx(tx_ring, size);
}
-#define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1)
static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_ring *tx_ring = adapter->tx_ring;
unsigned int first;
- unsigned int max_per_txd = E1000_MAX_PER_TXD;
- unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
unsigned int tx_flags = 0;
unsigned int len = skb_headlen(skb);
unsigned int nr_frags;
@@ -5040,18 +5061,8 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
}
mss = skb_shinfo(skb)->gso_size;
- /*
- * The controller does a simple calculation to
- * make sure there is enough room in the FIFO before
- * initiating the DMA for each buffer. The calc is:
- * 4 = ceil(buffer len/mss). To make sure we don't
- * overrun the FIFO, adjust the max buffer len if mss
- * drops.
- */
if (mss) {
u8 hdr_len;
- max_per_txd = min(mss << 2, max_per_txd);
- max_txd_pwr = fls(max_per_txd) - 1;
/*
* TSO Workaround for 82571/2/3 Controllers -- if skb->data
@@ -5081,12 +5092,12 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
count++;
count++;
- count += TXD_USE_COUNT(len, max_txd_pwr);
+ count += DIV_ROUND_UP(len, adapter->tx_fifo_limit);
nr_frags = skb_shinfo(skb)->nr_frags;
for (f = 0; f < nr_frags; f++)
- count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
- max_txd_pwr);
+ count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]),
+ adapter->tx_fifo_limit);
if (adapter->hw.mac.tx_pkt_filtering)
e1000_transfer_dhcp_info(adapter, skb);
@@ -5128,15 +5139,18 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
tx_flags |= E1000_TX_FLAGS_NO_FCS;
/* if count is 0 then mapping error has occurred */
- count = e1000_tx_map(tx_ring, skb, first, max_per_txd, nr_frags, mss);
+ count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit,
+ nr_frags);
if (count) {
skb_tx_timestamp(skb);
netdev_sent_queue(netdev, skb->len);
e1000_tx_queue(tx_ring, tx_flags, count);
/* Make sure there is space in the ring for the next send. */
- e1000_maybe_stop_tx(tx_ring, MAX_SKB_FRAGS + 2);
-
+ e1000_maybe_stop_tx(tx_ring,
+ (MAX_SKB_FRAGS *
+ DIV_ROUND_UP(PAGE_SIZE,
+ adapter->tx_fifo_limit) + 2));
} else {
dev_kfree_skb_any(skb);
tx_ring->buffer_info[first].time_stamp = 0;
@@ -6311,8 +6325,8 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
adapter->hw.phy.autoneg_advertised = 0x2f;
/* ring size defaults */
- adapter->rx_ring->count = 256;
- adapter->tx_ring->count = 256;
+ adapter->rx_ring->count = E1000_DEFAULT_RXD;
+ adapter->tx_ring->count = E1000_DEFAULT_TXD;
/*
* Initial Wake on LAN setting - If APM wake is enabled in
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 11:46:57 +0000