e1000e: add registers etc. printout code just before resetting adapters
authorTaku Izumi <izumi.taku@jp.fujitsu.com>
Tue, 27 Apr 2010 14:39:08 +0000 (14:39 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 28 Apr 2010 00:46:56 +0000 (17:46 -0700)
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: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Koki Sanagi <sanagi.koki@jp.fujitsu.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/e1000e/netdev.c

index 3a71215..904bd6b 100644 (file)
@@ -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);
 }