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Commit c97ec42a authored by Taku Izumi's avatar Taku Izumi Committed by David S. Miller
Browse files

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.

Signed-off-by: default avatarTaku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: default avatarKoki Sanagi <sanagi.koki@jp.fujitsu.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 84f4ee90

drivers/net/igb/igb_main.c

+332 −0
Original line number Diff line number Diff line
@@ -201,6 +201,336 @@ MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver"); 
MODULE_LICENSE("GPL");

MODULE_VERSION(DRV_VERSION);



struct igb_reg_info {

	u32 ofs;

	char *name;

};



static const struct igb_reg_info igb_reg_info_tbl[] = {



	/* General Registers */

	{E1000_CTRL, "CTRL"},

	{E1000_STATUS, "STATUS"},

	{E1000_CTRL_EXT, "CTRL_EXT"},



	/* Interrupt Registers */

	{E1000_ICR, "ICR"},



	/* RX Registers */

	{E1000_RCTL, "RCTL"},

	{E1000_RDLEN(0), "RDLEN"},

	{E1000_RDH(0), "RDH"},

	{E1000_RDT(0), "RDT"},

	{E1000_RXDCTL(0), "RXDCTL"},

	{E1000_RDBAL(0), "RDBAL"},

	{E1000_RDBAH(0), "RDBAH"},



	/* TX Registers */

	{E1000_TCTL, "TCTL"},

	{E1000_TDBAL(0), "TDBAL"},

	{E1000_TDBAH(0), "TDBAH"},

	{E1000_TDLEN(0), "TDLEN"},

	{E1000_TDH(0), "TDH"},

	{E1000_TDT(0), "TDT"},

	{E1000_TXDCTL(0), "TXDCTL"},

	{E1000_TDFH, "TDFH"},

	{E1000_TDFT, "TDFT"},

	{E1000_TDFHS, "TDFHS"},

	{E1000_TDFPC, "TDFPC"},



	/* List Terminator */

	{}

};



/*

 * igb_regdump - register printout routine

 */

static void igb_regdump(struct e1000_hw *hw, struct igb_reg_info *reginfo)

{

	int n = 0;

	char rname[16];

	u32 regs[8];



	switch (reginfo->ofs) {

	case E1000_RDLEN(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_RDLEN(n));

		break;

	case E1000_RDH(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_RDH(n));

		break;

	case E1000_RDT(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_RDT(n));

		break;

	case E1000_RXDCTL(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_RXDCTL(n));

		break;

	case E1000_RDBAL(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_RDBAL(n));

		break;

	case E1000_RDBAH(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_RDBAH(n));

		break;

	case E1000_TDBAL(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_RDBAL(n));

		break;

	case E1000_TDBAH(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_TDBAH(n));

		break;

	case E1000_TDLEN(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_TDLEN(n));

		break;

	case E1000_TDH(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_TDH(n));

		break;

	case E1000_TDT(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_TDT(n));

		break;

	case E1000_TXDCTL(0):

		for (n = 0; n < 4; n++)

			regs[n] = rd32(E1000_TXDCTL(n));

		break;

	default:

		printk(KERN_INFO "%-15s %08x\n",

			reginfo->name, rd32(reginfo->ofs));

		return;

	}



	snprintf(rname, 16, "%s%s", reginfo->name, "[0-3]");

	printk(KERN_INFO "%-15s ", rname);

	for (n = 0; n < 4; n++)

		printk(KERN_CONT "%08x ", regs[n]);

	printk(KERN_CONT "\n");

}



/*

 * 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;

	struct igb_reg_info *reginfo;

	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;



	if (!netif_msg_hw(adapter))

		return;



	/* Print netdevice Info */

	if (netdev) {

		dev_info(&adapter->pdev->dev, "Net device Info\n");

		printk(KERN_INFO "Device Name     state            "

			"trans_start      last_rx\n");

		printk(KERN_INFO "%-15s %016lX %016lX %016lX\n",

		netdev->name,

		netdev->state,

		netdev->trans_start,

		netdev->last_rx);

	}



	/* Print Registers */

	dev_info(&adapter->pdev->dev, "Register Dump\n");

	printk(KERN_INFO " Register Name   Value\n");

	for (reginfo = (struct igb_reg_info *)igb_reg_info_tbl;

	     reginfo->name; reginfo++) {

		igb_regdump(hw, reginfo);

	}



	/* Print TX Ring Summary */

	if (!netdev || !netif_running(netdev))

		goto exit;



	dev_info(&adapter->pdev->dev, "TX Rings Summary\n");

	printk(KERN_INFO "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_INFO " %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 (!netif_msg_tx_done(adapter))

		goto rx_ring_summary;



	dev_info(&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_INFO "------------------------------------\n");

		printk(KERN_INFO "TX QUEUE INDEX = %d\n", tx_ring->queue_index);

		printk(KERN_INFO "------------------------------------\n");

		printk(KERN_INFO "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_INFO "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(KERN_CONT " NTC/U\n");

			else if (i == tx_ring->next_to_use)

				printk(KERN_CONT " NTU\n");

			else if (i == tx_ring->next_to_clean)

				printk(KERN_CONT " NTC\n");

			else

				printk(KERN_CONT "\n");



			if (netif_msg_pktdata(adapter) && buffer_info->dma != 0)

				print_hex_dump(KERN_INFO, "",

					DUMP_PREFIX_ADDRESS,

					16, 1, phys_to_virt(buffer_info->dma),

					buffer_info->length, true);

		}

	}



	/* Print RX Rings Summary */

rx_ring_summary:

	dev_info(&adapter->pdev->dev, "RX Rings Summary\n");

	printk(KERN_INFO "Queue [NTU] [NTC]\n");

	for (n = 0; n < adapter->num_rx_queues; n++) {

		rx_ring = adapter->rx_ring[n];

		printk(KERN_INFO " %5d %5X %5X\n", n,

			   rx_ring->next_to_use, rx_ring->next_to_clean);

	}



	/* Print RX Rings */

	if (!netif_msg_rx_status(adapter))

		goto exit;



	dev_info(&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_INFO "------------------------------------\n");

		printk(KERN_INFO "RX QUEUE INDEX = %d\n", rx_ring->queue_index);

		printk(KERN_INFO "------------------------------------\n");

		printk(KERN_INFO "R  [desc]      [ PktBuf     A0] "

			"[  HeadBuf   DD] [bi->dma       ] [bi->skb] "

			"<-- Adv Rx Read format\n");

		printk(KERN_INFO "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_INFO "RWB[0x%03X]     %016llX "

					"%016llX ---------------- %p", i,

					le64_to_cpu(u0->a),

					le64_to_cpu(u0->b),

					buffer_info->skb);

			} else {

				printk(KERN_INFO "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 (netif_msg_pktdata(adapter)) {

					print_hex_dump(KERN_INFO, "",

						DUMP_PREFIX_ADDRESS,

						16, 1,

						phys_to_virt(buffer_info->dma),

						rx_ring->rx_buffer_len, true);

					if (rx_ring->rx_buffer_len

						< IGB_RXBUFFER_1024)

						print_hex_dump(KERN_INFO, "",

						  DUMP_PREFIX_ADDRESS,

						  16, 1,

						  phys_to_virt(

						    buffer_info->page_dma +

						    buffer_info->page_offset),

						  PAGE_SIZE/2, true);

				}

			}



			if (i == rx_ring->next_to_use)

				printk(KERN_CONT " NTU\n");

			else if (i == rx_ring->next_to_clean)

				printk(KERN_CONT " NTC\n");

			else

				printk(KERN_CONT "\n");



		}

	}



exit:

	return;

}





/**

 * igb_read_clock - read raw cycle counter (to be used by time counter)

 */
@@ -3858,6 +4188,8 @@ static void igb_reset_task(struct work_struct *work) 
	struct igb_adapter *adapter;

	adapter = container_of(work, struct igb_adapter, reset_task);



	igb_dump(adapter);

	netdev_err(adapter->netdev, "Reset adapter\n");

	igb_reinit_locked(adapter);

}