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Date: Thu, 07 Jan 2010 20:01:58 +0900
From: Taku Izumi <izumi.taku@...fujitsu.com>
To: netdev@...r.kernel.org, Bruce Allan <bruce.w.allan@...el.com>,
"David S. Miller" <davem@...emloft.net>,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
John Ronciak <john.ronciak@...el.com>,
"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
PJ Waskiewicz <peter.p.waskiewicz.jr@...el.com>
CC: Koki Sanagi <sanagi.koki@...fujitsu.com>,
Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
Subject: [PATCH 2/3] igb: add registers etc. printout code just before resetting
adapters
This patch adds registers (,tx/rx rings' status and so on) printout
code just before resetting adapters. This will be helpful for detecting
the root cause of adapters reset.
The default output is netdevice status (transstart, last_rx), registers,
and tx/rx rings' simple information. TX/RX descriptors information and
buffer_info can be output by changing the dump_flag module option, but,
of course, the amount of output becomes quite large.
Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com>
Signed-off-by: Koki Sanagi <sanagi.koki@...fujitsu.com>
---
drivers/net/igb/igb_main.c | 360 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 360 insertions(+)
Index: net-next-2.6/drivers/net/igb/igb_main.c
===================================================================
--- net-next-2.6.orig/drivers/net/igb/igb_main.c
+++ net-next-2.6/drivers/net/igb/igb_main.c
@@ -60,6 +60,14 @@ static const struct e1000_info *igb_info
[board_82575] = &e1000_82575_info,
};
+static unsigned int dump_flag = 1;
+module_param(dump_flag, uint, 0644);
+MODULE_PARM_DESC(dump_flag, "Dump Flag");
+#define IGB_DUMP_REGS (1 << 0)
+#define IGB_DUMP_TX_RINGS (1 << 1)
+#define IGB_DUMP_RX_RINGS (1 << 2)
+#define IGB_DUMP_BUFFERS (1 << 3)
+
static struct pci_device_id igb_pci_tbl[] = {
{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER), board_82575 },
{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_FIBER), board_82575 },
@@ -189,6 +197,357 @@ MODULE_DESCRIPTION("Intel(R) Gigabit Eth
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
+static void hexdump(dma_addr_t dma, u16 len)
+{
+ uint16_t offset, i;
+ char str[80], byte[4];
+ void *va = phys_to_virt((unsigned long)dma);
+
+ printk(KERN_ERR "buffer at %016llX (%d)\n", (u64)dma, len);
+ for (offset = 0; offset < len; offset += 16) {
+ sprintf(str, "%04x: ", offset);
+ for (i = 0; i < 16; i++) {
+ if ((offset + i) < len)
+ sprintf(byte, "%02x ",
+ ((unsigned char *)va)[offset + i]);
+ else
+ strcpy(byte, " ");
+ strcat(str, byte);
+ }
+ printk(KERN_ERR "%s\n", str);
+ }
+}
+
+/*
+ * igb_dump - Print registers, tx-rings and rx-rings
+ */
+static void igb_dump(struct igb_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct e1000_hw *hw = &adapter->hw;
+ u32 reg;
+ char rname[16];
+ int n = 0;
+ struct igb_ring *tx_ring;
+ union e1000_adv_tx_desc *tx_desc;
+ struct my_u0 { u64 a; u64 b; } *u0;
+ struct igb_buffer *buffer_info;
+ struct igb_ring *rx_ring;
+ union e1000_adv_rx_desc *rx_desc;
+ u32 staterr;
+ int i = 0;
+
+ /* Print netdevice Info */
+ if (netdev) {
+ dev_err(&adapter->pdev->dev, "Net device Info\n");
+ printk(KERN_ERR "Device Name state "
+ "trans_start last_rx\n");
+ printk(KERN_ERR "%-15s %016lX %016lX %016lX\n",
+ netdev->name,
+ netdev->state,
+ netdev->trans_start,
+ netdev->last_rx);
+ }
+
+ /* Print Registers */
+ if ((dump_flag & IGB_DUMP_REGS) == 0)
+ goto tx_ring_summary;
+
+ dev_err(&adapter->pdev->dev, "Register Dump\n");
+
+ printk(KERN_ERR " Register Name [value ]\n");
+ for (reg = 0; reg < 0x04000; reg += sizeof(u32)) {
+ switch (reg & 0xffffffff) {
+ /* General Registers */
+ case E1000_CTRL:
+ sprintf(rname, "CTRL"); break;
+ case E1000_STATUS:
+ sprintf(rname, "STATUS"); break;
+ case E1000_CTRL_EXT:
+ sprintf(rname, "CTRL_EXT"); break;
+
+ /* Interrupt Registers*/
+ case E1000_ICR:
+ sprintf(rname, "ICR"); break;
+
+ /* RX */
+ case E1000_RCTL:
+ sprintf(rname, "RCTL"); break;
+ case E1000_RDLEN(0):
+ sprintf(rname, "RDLEN[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_RDLEN(n)));
+ printk("\n");
+ continue;
+ case E1000_RDH(0):
+ sprintf(rname, "RDH[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_RDH(n)));
+ printk("\n");
+ continue;
+ case E1000_RDT(0):
+ sprintf(rname, "RDT[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_RDT(n)));
+ printk("\n");
+ continue;
+ case E1000_RXDCTL(0):
+ sprintf(rname, "RXDCTL[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_RXDCTL(n)));
+ printk("\n");
+ continue;
+ case E1000_RDBAL(0):
+ sprintf(rname, "RDBAL[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_RDBAL(n)));
+ printk("\n");
+ continue;
+ case E1000_RDBAH(0):
+ sprintf(rname, "RDBAH[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_RDBAH(n)));
+ printk("\n");
+ continue;
+
+ /* TX */
+ case E1000_TCTL:
+ sprintf(rname, "TCTL"); break;
+ case E1000_TDBAL(0):
+ sprintf(rname, "TDBAL[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_TDBAL(n)));
+ printk("\n");
+ continue;
+ case E1000_TDBAH(0):
+ sprintf(rname, "TDBAH[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_TDBAH(n)));
+ printk("\n");
+ continue;
+ case E1000_TDLEN(0):
+ sprintf(rname, "TDLEN[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_TDLEN(n)));
+ printk("\n");
+ continue;
+ case E1000_TDH(0):
+ sprintf(rname, "TDH[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_TDH(n)));
+ printk("\n");
+ continue;
+ case E1000_TDT(0):
+ sprintf(rname, "TDT[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_TDT(n)));
+ printk("\n");
+ continue;
+ case E1000_TXDCTL(0):
+ sprintf(rname, "TXDCTL[0-3]");
+ printk(KERN_ERR "%-15s ", rname);
+ for (n = 0; n < 4; n++)
+ printk("%08x ", rd32(E1000_TXDCTL(n)));
+ printk("\n");
+ continue;
+ case E1000_TDFH:
+ sprintf(rname, "TDFH"); break;
+ case E1000_TDFT:
+ sprintf(rname, "TDFT"); break;
+ case E1000_TDFHS:
+ sprintf(rname, "TDFHS"); break;
+ case E1000_TDFPC:
+ sprintf(rname, "TDFPC"); break;
+
+ default:
+ continue;
+ }
+
+ printk(KERN_ERR "%-15s %08x\n", rname,
+ rd32((reg & 0xffffffff)));
+
+ }
+
+ /* Print TX Ring Summary */
+tx_ring_summary:
+ if (!netdev || !netif_running(netdev))
+ goto exit;
+
+ dev_err(&adapter->pdev->dev, "TX Rings Summary\n");
+ printk(KERN_ERR "Queue [NTU] [NTC] [bi(ntc)->dma ]"
+ " leng ntw timestamp\n");
+ for (n = 0; n < adapter->num_tx_queues; n++) {
+ tx_ring = &adapter->tx_ring[n];
+ buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
+ printk(KERN_ERR " %5d %5X %5X %016llX %04X %3X %016llX\n",
+ n, tx_ring->next_to_use, tx_ring->next_to_clean,
+ (u64)buffer_info->dma,
+ buffer_info->length,
+ buffer_info->next_to_watch,
+ (u64)buffer_info->time_stamp);
+ }
+
+ /* Print TX Rings */
+ if ((dump_flag & IGB_DUMP_TX_RINGS) == 0)
+ goto rx_ring_summary;
+
+ dev_err(&adapter->pdev->dev, "TX Rings Dump\n");
+
+ /* Transmit Descriptor Formats
+ *
+ * Advanced Transmit Descriptor
+ * +--------------------------------------------------------------+
+ * 0 | Buffer Address [63:0] |
+ * +--------------------------------------------------------------+
+ * 8 | PAYLEN | PORTS |CC|IDX | STA | DCMD |DTYP|MAC|RSV| DTALEN |
+ * +--------------------------------------------------------------+
+ * 63 46 45 40 39 38 36 35 32 31 24 15 0
+ */
+
+ for (n = 0; n < adapter->num_tx_queues; n++) {
+ tx_ring = &adapter->tx_ring[n];
+ printk(KERN_ERR "------------------------------------\n");
+ printk(KERN_ERR "TX QUEUE INDEX = %d\n", tx_ring->queue_index);
+ printk(KERN_ERR "------------------------------------\n");
+ printk(KERN_ERR "T [desc] [address 63:0 ] "
+ "[PlPOCIStDDM Ln] [bi->dma ] "
+ "leng ntw timestamp bi->skb\n");
+
+ for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
+ tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
+ buffer_info = &tx_ring->buffer_info[i];
+ u0 = (struct my_u0 *)tx_desc;
+ printk(KERN_ERR "T [0x%03X] %016llX %016llX %016llX"
+ " %04X %3X %016llX %p", i,
+ le64_to_cpu(u0->a),
+ le64_to_cpu(u0->b),
+ (u64)buffer_info->dma,
+ buffer_info->length,
+ buffer_info->next_to_watch,
+ (u64)buffer_info->time_stamp,
+ buffer_info->skb);
+ if (i == tx_ring->next_to_use &&
+ i == tx_ring->next_to_clean)
+ printk(" NTC/U\n");
+ else if (i == tx_ring->next_to_use)
+ printk(" NTU\n");
+ else if (i == tx_ring->next_to_clean)
+ printk(" NTC\n");
+ else
+ printk("\n");
+
+ if ((dump_flag & IGB_DUMP_BUFFERS) &&
+ buffer_info->dma != 0)
+ hexdump(buffer_info->dma, buffer_info->length);
+ }
+ }
+
+ /* Print RX Rings Summary */
+rx_ring_summary:
+ dev_err(&adapter->pdev->dev, "RX Rings Summary\n");
+ printk(KERN_ERR "Queue [NTU] [NTC]\n");
+ for (n = 0; n < adapter->num_rx_queues; n++) {
+ rx_ring = &adapter->rx_ring[n];
+ printk(KERN_ERR " %5d %5X %5X\n", n,
+ rx_ring->next_to_use, rx_ring->next_to_clean);
+ }
+
+ /* Print RX Rings */
+ if ((dump_flag & IGB_DUMP_RX_RINGS) == 0)
+ goto exit;
+
+ dev_err(&adapter->pdev->dev, "RX Rings Dump\n");
+
+ /* Advanced Receive Descriptor (Read) Format
+ * 63 1 0
+ * +-----------------------------------------------------+
+ * 0 | Packet Buffer Address [63:1] |A0/NSE|
+ * +----------------------------------------------+------+
+ * 8 | Header Buffer Address [63:1] | DD |
+ * +-----------------------------------------------------+
+ *
+ *
+ * Advanced Receive Descriptor (Write-Back) Format
+ *
+ * 63 48 47 32 31 30 21 20 17 16 4 3 0
+ * +------------------------------------------------------+
+ * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
+ * | Checksum Ident | | | | Type | Type |
+ * +------------------------------------------------------+
+ * 8 | VLAN Tag | Length | Extended Error | Extended Status |
+ * +------------------------------------------------------+
+ * 63 48 47 32 31 20 19 0
+ */
+
+ for (n = 0; n < adapter->num_rx_queues; n++) {
+ rx_ring = &adapter->rx_ring[n];
+ printk(KERN_ERR "------------------------------------\n");
+ printk(KERN_ERR "RX QUEUE INDEX = %d\n", rx_ring->queue_index);
+ printk(KERN_ERR "------------------------------------\n");
+ printk(KERN_ERR "R [desc] [ PktBuf A0] "
+ "[ HeadBuf DD] [bi->dma ] [bi->skb] "
+ "<-- Adv Rx Read format\n");
+ printk(KERN_ERR "RWB[desc] [PcsmIpSHl PtRs] "
+ "[vl er S cks ln] ---------------- [bi->skb] "
+ "<-- Adv Rx Write-Back format\n");
+
+ for (i = 0; i < rx_ring->count; i++) {
+ buffer_info = &rx_ring->buffer_info[i];
+ rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
+ u0 = (struct my_u0 *)rx_desc;
+ staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
+ if (staterr & E1000_RXD_STAT_DD) {
+ /* Descriptor Done */
+ printk(KERN_ERR "RWB[0x%03X] %016llX "
+ "%016llX ---------------- %p", i,
+ le64_to_cpu(u0->a),
+ le64_to_cpu(u0->b),
+ buffer_info->skb);
+ } else {
+ printk(KERN_ERR "R [0x%03X] %016llX "
+ "%016llX %016llX %p", i,
+ le64_to_cpu(u0->a),
+ le64_to_cpu(u0->b),
+ (u64)buffer_info->dma,
+ buffer_info->skb);
+
+ if (dump_flag & IGB_DUMP_BUFFERS) {
+ hexdump(buffer_info->dma,
+ rx_ring->rx_buffer_len);
+ if (rx_ring->rx_buffer_len
+ < IGB_RXBUFFER_1024)
+ hexdump(buffer_info->page_dma +
+ buffer_info->page_offset,
+ PAGE_SIZE/2);
+ }
+ }
+
+ if (i == rx_ring->next_to_use)
+ printk(" NTU\n");
+ else if (i == rx_ring->next_to_clean)
+ printk(" NTC\n");
+ else
+ printk("\n");
+
+ }
+ }
+
+exit:
+ return;
+}
+
+
/**
* igb_read_clock - read raw cycle counter (to be used by time counter)
*/
@@ -3859,6 +4218,7 @@ static void igb_reset_task(struct work_s
struct igb_adapter *adapter;
adapter = container_of(work, struct igb_adapter, reset_task);
+ igb_dump(adapter);
igb_reinit_locked(adapter);
}
--
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