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Commit 84f4ee90 authored by Taku Izumi's avatar Taku Izumi Committed by David S. Miller
Browse files

e1000e: 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 675ad473

drivers/net/e1000e/netdev.c

+357 −0
Original line number Diff line number Diff line
@@ -69,6 +69,361 @@ static const struct e1000_info *e1000_info_tbl[] = { 
	[board_pchlan]		= &e1000_pch_info,

};



struct e1000_reg_info {

	u32 ofs;

	char *name;

};



#define E1000_RDFH	0x02410 /* Rx Data FIFO Head - RW */

#define E1000_RDFT	0x02418 /* Rx Data FIFO Tail - RW */

#define E1000_RDFHS	0x02420 /* Rx Data FIFO Head Saved - RW */

#define E1000_RDFTS	0x02428 /* Rx Data FIFO Tail Saved - RW */

#define E1000_RDFPC	0x02430 /* Rx Data FIFO Packet Count - RW */



#define E1000_TDFH	0x03410 /* Tx Data FIFO Head - RW */

#define E1000_TDFT	0x03418 /* Tx Data FIFO Tail - RW */

#define E1000_TDFHS	0x03420 /* Tx Data FIFO Head Saved - RW */

#define E1000_TDFTS	0x03428 /* Tx Data FIFO Tail Saved - RW */

#define E1000_TDFPC	0x03430 /* Tx Data FIFO Packet Count - RW */



static const struct e1000_reg_info e1000_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, "RDLEN"},

	{E1000_RDH, "RDH"},

	{E1000_RDT, "RDT"},

	{E1000_RDTR, "RDTR"},

	{E1000_RXDCTL(0), "RXDCTL"},

	{E1000_ERT, "ERT"},

	{E1000_RDBAL, "RDBAL"},

	{E1000_RDBAH, "RDBAH"},

	{E1000_RDFH, "RDFH"},

	{E1000_RDFT, "RDFT"},

	{E1000_RDFHS, "RDFHS"},

	{E1000_RDFTS, "RDFTS"},

	{E1000_RDFPC, "RDFPC"},



	/* TX Registers */

	{E1000_TCTL, "TCTL"},

	{E1000_TDBAL, "TDBAL"},

	{E1000_TDBAH, "TDBAH"},

	{E1000_TDLEN, "TDLEN"},

	{E1000_TDH, "TDH"},

	{E1000_TDT, "TDT"},

	{E1000_TIDV, "TIDV"},

	{E1000_TXDCTL(0), "TXDCTL"},

	{E1000_TADV, "TADV"},

	{E1000_TARC(0), "TARC"},

	{E1000_TDFH, "TDFH"},

	{E1000_TDFT, "TDFT"},

	{E1000_TDFHS, "TDFHS"},

	{E1000_TDFTS, "TDFTS"},

	{E1000_TDFPC, "TDFPC"},



	/* List Terminator */

	{}

};



/*

 * e1000_regdump - register printout routine

 */

static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)

{

	int n = 0;

	char rname[16];

	u32 regs[8];



	switch (reginfo->ofs) {

	case E1000_RXDCTL(0):

		for (n = 0; n < 2; n++)

			regs[n] = __er32(hw, E1000_RXDCTL(n));

		break;

	case E1000_TXDCTL(0):

		for (n = 0; n < 2; n++)

			regs[n] = __er32(hw, E1000_TXDCTL(n));

		break;

	case E1000_TARC(0):

		for (n = 0; n < 2; n++)

			regs[n] = __er32(hw, E1000_TARC(n));

		break;

	default:

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

			reginfo->name, __er32(hw, reginfo->ofs));

		return;

	}



	snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");

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

	for (n = 0; n < 2; n++)

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

	printk(KERN_CONT "\n");

}





/*

 * e1000e_dump - Print registers, tx-ring and rx-ring

 */

static void e1000e_dump(struct e1000_adapter *adapter)

{

	struct net_device *netdev = adapter->netdev;

	struct e1000_hw *hw = &adapter->hw;

	struct e1000_reg_info *reginfo;

	struct e1000_ring *tx_ring = adapter->tx_ring;

	struct e1000_tx_desc *tx_desc;

	struct my_u0 { u64 a; u64 b; } *u0;

	struct e1000_buffer *buffer_info;

	struct e1000_ring *rx_ring = adapter->rx_ring;

	union e1000_rx_desc_packet_split *rx_desc_ps;

	struct e1000_rx_desc *rx_desc;

	struct my_u1 { u64 a; u64 b; u64 c; u64 d; } *u1;

	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 e1000_reg_info *)e1000_reg_info_tbl;

	     reginfo->name; reginfo++) {

		e1000_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");

	buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];

	printk(KERN_INFO " %5d %5X %5X %016llX %04X %3X %016llX\n",

		0, 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 - DEXT[29] is 0 (Legacy) or 1 (Extended)

	 *

	 * Legacy Transmit Descriptor

	 *   +--------------------------------------------------------------+

	 * 0 |         Buffer Address [63:0] (Reserved on Write Back)       |

	 *   +--------------------------------------------------------------+

	 * 8 | Special  |    CSS     | Status |  CMD    |  CSO   |  Length  |

	 *   +--------------------------------------------------------------+

	 *   63       48 47        36 35    32 31     24 23    16 15        0

	 *

	 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload

	 *   63      48 47    40 39       32 31             16 15    8 7      0

	 *   +----------------------------------------------------------------+

	 * 0 |  TUCSE  | TUCS0  |   TUCSS   |     IPCSE       | IPCS0 | IPCSS |

	 *   +----------------------------------------------------------------+

	 * 8 |   MSS   | HDRLEN | RSV | STA | TUCMD | DTYP |      PAYLEN      |

	 *   +----------------------------------------------------------------+

	 *   63      48 47    40 39 36 35 32 31   24 23  20 19                0

	 *

	 * Extended Data Descriptor (DTYP=0x1)

	 *   +----------------------------------------------------------------+

	 * 0 |                     Buffer Address [63:0]                      |

	 *   +----------------------------------------------------------------+

	 * 8 | VLAN tag |  POPTS  | Rsvd | Status | Command | DTYP |  DTALEN  |

	 *   +----------------------------------------------------------------+

	 *   63       48 47     40 39  36 35    32 31     24 23  20 19        0

	 */

	printk(KERN_INFO "Tl[desc]     [address 63:0  ] [SpeCssSCmCsLen]"

		" [bi->dma       ] leng  ntw timestamp        bi->skb "

		"<-- Legacy format\n");

	printk(KERN_INFO "Tc[desc]     [Ce CoCsIpceCoS] [MssHlRSCm0Plen]"

		" [bi->dma       ] leng  ntw timestamp        bi->skb "

		"<-- Ext Context format\n");

	printk(KERN_INFO "Td[desc]     [address 63:0  ] [VlaPoRSCm1Dlen]"

		" [bi->dma       ] leng  ntw timestamp        bi->skb "

		"<-- Ext Data format\n");

	for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {

		tx_desc = E1000_TX_DESC(*tx_ring, i);

		buffer_info = &tx_ring->buffer_info[i];

		u0 = (struct my_u0 *)tx_desc;

		printk(KERN_INFO "T%c[0x%03X]    %016llX %016llX %016llX "

			"%04X  %3X %016llX %p",

		       (!(le64_to_cpu(u0->b) & (1<<29)) ? 'l' :

			((le64_to_cpu(u0->b) & (1<<20)) ? 'd' : 'c')), 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");

	printk(KERN_INFO " %5d %5X %5X\n", 0,

		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");

	switch (adapter->rx_ps_pages) {

	case 1:

	case 2:

	case 3:

		/* [Extended] Packet Split Receive Descriptor Format

		 *

		 *    +-----------------------------------------------------+

		 *  0 |                Buffer Address 0 [63:0]              |

		 *    +-----------------------------------------------------+

		 *  8 |                Buffer Address 1 [63:0]              |

		 *    +-----------------------------------------------------+

		 * 16 |                Buffer Address 2 [63:0]              |

		 *    +-----------------------------------------------------+

		 * 24 |                Buffer Address 3 [63:0]              |

		 *    +-----------------------------------------------------+

		 */

		printk(KERN_INFO "R  [desc]      [buffer 0 63:0 ] "

			"[buffer 1 63:0 ] "

		       "[buffer 2 63:0 ] [buffer 3 63:0 ] [bi->dma       ] "

		       "[bi->skb] <-- Ext Pkt Split format\n");

		/* [Extended] Receive Descriptor (Write-Back) Format

		 *

		 *   63       48 47    32 31     13 12    8 7    4 3        0

		 *   +------------------------------------------------------+

		 * 0 | Packet   | IP     |  Rsvd   | MRQ   | Rsvd | MRQ RSS |

		 *   | Checksum | Ident  |         | Queue |      |  Type   |

		 *   +------------------------------------------------------+

		 * 8 | VLAN Tag | Length | Extended Error | Extended Status |

		 *   +------------------------------------------------------+

		 *   63       48 47    32 31            20 19               0

		 */

		printk(KERN_INFO "RWB[desc]      [ck ipid mrqhsh] "

			"[vl   l0 ee  es] "

		       "[ l3  l2  l1 hs] [reserved      ] ---------------- "

		       "[bi->skb] <-- Ext Rx Write-Back format\n");

		for (i = 0; i < rx_ring->count; i++) {

			buffer_info = &rx_ring->buffer_info[i];

			rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);

			u1 = (struct my_u1 *)rx_desc_ps;

			staterr =

				le32_to_cpu(rx_desc_ps->wb.middle.status_error);

			if (staterr & E1000_RXD_STAT_DD) {

				/* Descriptor Done */

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

					"%016llX %016llX %016llX "

					"---------------- %p", i,

					le64_to_cpu(u1->a),

					le64_to_cpu(u1->b),

					le64_to_cpu(u1->c),

					le64_to_cpu(u1->d),

					buffer_info->skb);

			} else {

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

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

					le64_to_cpu(u1->a),

					le64_to_cpu(u1->b),

					le64_to_cpu(u1->c),

					le64_to_cpu(u1->d),

					(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),

						adapter->rx_ps_bsize0, 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");

		}

		break;

	default:

	case 0:

		/* Legacy Receive Descriptor Format

		 *

		 * +-----------------------------------------------------+

		 * |                Buffer Address [63:0]                |

		 * +-----------------------------------------------------+

		 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |

		 * +-----------------------------------------------------+

		 * 63       48 47    40 39      32 31         16 15      0

		 */

		printk(KERN_INFO "Rl[desc]     [address 63:0  ] "

			"[vl er S cks ln] [bi->dma       ] [bi->skb] "

			"<-- Legacy format\n");

		for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {

			rx_desc = E1000_RX_DESC(*rx_ring, i);

			buffer_info = &rx_ring->buffer_info[i];

			u0 = (struct my_u0 *)rx_desc;

			printk(KERN_INFO "Rl[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 (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");



			if (netif_msg_pktdata(adapter))

				print_hex_dump(KERN_INFO, "",

					DUMP_PREFIX_ADDRESS,

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

					adapter->rx_buffer_len, true);

		}

	}



exit:

	return;

}



/**

 * e1000_desc_unused - calculate if we have unused descriptors

 **/
@@ -4269,6 +4624,8 @@ static void e1000_reset_task(struct work_struct *work) 
	struct e1000_adapter *adapter;

	adapter = container_of(work, struct e1000_adapter, reset_task);



	e1000e_dump(adapter);

	e_err("Reset adapter\n");

	e1000e_reinit_locked(adapter);

}