[net-next 02/11] e1000: Adding e1000_dump function

Jeff Kirsher
2012-02-07T12:34:13Z

From: Tushar Dave <tushar.n.dave@intel.com>

When TX hang occurs e1000_dump prints TX ring, RX ring and Device registers.

Signed-off-by: Tushar Dave <tushar.n.dave@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
drivers/net/ethernet/intel/e1000/e1000.h | 1 +
drivers/net/ethernet/intel/e1000/e1000_hw.h | 10 +
drivers/net/ethernet/intel/e1000/e1000_main.c | 224 +++++++++++++++++++++++++
3 files changed, 235 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000/e1000.h b/drivers/net/ethernet/intel/e1000/e1000.h
index 1e15969..2b6cd02 100644
--- a/drivers/net/ethernet/intel/e1000/e1000.h
+++ b/drivers/net/ethernet/intel/e1000/e1000.h
@@ -254,6 +254,7 @@ struct e1000_adapter {
atomic_t tx_fifo_stall;
bool pcix_82544;
bool detect_tx_hung;
+ bool dump_buffers;

/* RX */
bool (*clean_rx)(struct e1000_adapter *adapter,
diff --git a/drivers/net/ethernet/intel/e1000/e1000_hw.h b/drivers/net/ethernet/intel/e1000/e1000_hw.h
index f6c4d7e..11578c8 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_hw.h
+++ b/drivers/net/ethernet/intel/e1000/e1000_hw.h
@@ -895,6 +895,11 @@ struct e1000_ffvt_entry {
#define E1000_FCRTL 0x02160 /* Flow Control Receive Threshold Low - RW */
#define E1000_FCRTH 0x02168 /* Flow Control Receive Threshold High - RW */
#define E1000_PSRCTL 0x02170 /* Packet Split Receive Control - RW */
+#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_RDBAL 0x02800 /* RX Descriptor Base Address Low - RW */
#define E1000_RDBAH 0x02804 /* RX Descriptor Base Address High - RW */
#define E1000_RDLEN 0x02808 /* RX Descriptor Length - RW */
@@ -1074,6 +1079,11 @@ struct e1000_ffvt_entry {
#define E1000_82542_IMC E1000_IMC
#define E1000_82542_RCTL E1000_RCTL
#define E1000_82542_RDTR 0x00108
+#define E1000_82542_RDFH E1000_RDFH
+#define E1000_82542_RDFT E1000_RDFT
+#define E1000_82542_RDFHS E1000_RDFHS
+#define E1000_82542_RDFTS E1000_RDFTS
+#define E1000_82542_RDFPC E1000_RDFPC
#define E1000_82542_RDBAL 0x00110
#define E1000_82542_RDBAH 0x00114
#define E1000_82542_RDLEN 0x00118
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
index 363fd39..1f86a70 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -3239,6 +3239,228 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
return NETDEV_TX_OK;
}

+#define NUM_REGS 38 /* 1 based count */
+static void e1000_regdump(struct e1000_adapter *adapter)
+{
+ struct e1000_hw *hw = &adapter->hw;
+ u32 regs[NUM_REGS];
+ u32 *regs_buff = regs;
+ int i = 0;
+
+ char *reg_name[] = {
+ "CTRL", "STATUS",
+ "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
+ "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
+ "TIDV", "TXDCTL", "TADV", "TARC0",
+ "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
+ "TXDCTL1", "TARC1",
+ "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
+ "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
+ "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
+ };
+
+ regs_buff[0] = er32(CTRL);
+ regs_buff[1] = er32(STATUS);
+
+ regs_buff[2] = er32(RCTL);
+ regs_buff[3] = er32(RDLEN);
+ regs_buff[4] = er32(RDH);
+ regs_buff[5] = er32(RDT);
+ regs_buff[6] = er32(RDTR);
+
+ regs_buff[7] = er32(TCTL);
+ regs_buff[8] = er32(TDBAL);
+ regs_buff[9] = er32(TDBAH);
+ regs_buff[10] = er32(TDLEN);
+ regs_buff[11] = er32(TDH);
+ regs_buff[12] = er32(TDT);
+ regs_buff[13] = er32(TIDV);
+ regs_buff[14] = er32(TXDCTL);
+ regs_buff[15] = er32(TADV);
+ regs_buff[16] = er32(TARC0);
+
+ regs_buff[17] = er32(TDBAL1);
+ regs_buff[18] = er32(TDBAH1);
+ regs_buff[19] = er32(TDLEN1);
+ regs_buff[20] = er32(TDH1);
+ regs_buff[21] = er32(TDT1);
+ regs_buff[22] = er32(TXDCTL1);
+ regs_buff[23] = er32(TARC1);
+ regs_buff[24] = er32(CTRL_EXT);
+ regs_buff[25] = er32(ERT);
+ regs_buff[26] = er32(RDBAL0);
+ regs_buff[27] = er32(RDBAH0);
+ regs_buff[28] = er32(TDFH);
+ regs_buff[29] = er32(TDFT);
+ regs_buff[30] = er32(TDFHS);
+ regs_buff[31] = er32(TDFTS);
+ regs_buff[32] = er32(TDFPC);
+ regs_buff[33] = er32(RDFH);
+ regs_buff[34] = er32(RDFT);
+ regs_buff[35] = er32(RDFHS);
+ regs_buff[36] = er32(RDFTS);
+ regs_buff[37] = er32(RDFPC);
+
+ pr_info("Register dump\n");
+ for (i = 0; i < NUM_REGS; i++) {
+ printk(KERN_INFO "%-15s %08x\n",
+ reg_name[i], regs_buff[i]);
+ }
+}
+
+/*
+ * e1000_dump: Print registers, tx ring and rx ring
+ */
+static void e1000_dump(struct e1000_adapter *adapter)
+{
+ /* this code doesn't handle multiple rings */
+ struct e1000_tx_ring *tx_ring = adapter->tx_ring;
+ struct e1000_rx_ring *rx_ring = adapter->rx_ring;
+ int i;
+
+ if (!netif_msg_hw(adapter))
+ return;
+
+ /* Print Registers */
+ e1000_regdump(adapter);
+
+ /*
+ * transmit dump
+ */
+ pr_info("TX Desc ring0 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 "Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ]"
+ " leng ntw timestmp bi->skb\n");
+ printk(KERN_INFO "Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ]"
+ " leng ntw timestmp bi->skb\n");
+
+ if (!netif_msg_tx_done(adapter))
+ goto rx_ring_summary;
+
+ for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
+ struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
+ struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
+ struct my_u { u64 a; u64 b; };
+ struct my_u *u = (struct my_u *)tx_desc;
+ printk(KERN_INFO "T%c[0x%03X] %016llX %016llX %016llX %04X %3X "
+ "%016llX %p",
+ ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
+ le64_to_cpu(u->a), le64_to_cpu(u->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);
+ }
+
+rx_ring_summary:
+ /*
+ * receive dump
+ */
+ pr_info("\nRX Desc ring dump\n");
+
+ /* 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 "R[desc] [address 63:0 ] [vl er S cks ln] "
+ "[bi->dma ] [bi->skb]\n");
+
+ if (!netif_msg_rx_status(adapter))
+ goto exit;
+
+ for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
+ struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
+ struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
+ struct my_u { u64 a; u64 b; };
+ struct my_u *u = (struct my_u *)rx_desc;
+ printk(KERN_INFO "R[0x%03X] %016llX %016llX %016llX %p",
+ i, le64_to_cpu(u->a), le64_to_cpu(u->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),
+ buffer_info->length, true);
+
+ } /* for */
+
+ /* dump the descriptor caches */
+ /* rx */
+ printk(KERN_INFO "e1000: Rx descriptor cache in 64bit format\n");
+ for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
+ printk(KERN_INFO "R%04X: %08X|%08X %08X|%08X\n",
+ i,
+ readl(adapter->hw.hw_addr + i+4),
+ readl(adapter->hw.hw_addr + i),
+ readl(adapter->hw.hw_addr + i+12),
+ readl(adapter->hw.hw_addr + i+8));
+ }
+ /* tx */
+ printk(KERN_INFO "e1000: Tx descriptor cache in 64bit format\n");
+ for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
+ printk(KERN_INFO "T%04X: %08X|%08X %08X|%08X\n",
+ i,
+ readl(adapter->hw.hw_addr + i+4),
+ readl(adapter->hw.hw_addr + i),
+ readl(adapter->hw.hw_addr + i+12),
+ readl(adapter->hw.hw_addr + i+8));
+ }
+exit:
+ return;
+}
+
/**
* e1000_tx_timeout - Respond to a Tx Hang
* @netdev: network interface device structure
@@ -3260,6 +3482,7 @@ static void e1000_reset_task(struct work_struct *work)

if (test_bit(__E1000_DOWN, &adapter->flags))
return;
+ e_err(drv, "Reset adapter\n");
e1000_reinit_safe(adapter);
}

@@ -3677,6 +3900,7 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
eop,
jiffies,
eop_desc->upper.fields.status);
+ e1000_dump(adapter);
netif_stop_queue(netdev);
}
}
--
1.7.7.6