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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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e1000: Adding e1000_dump function
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>
This commit is contained in:
Tushar Dave
Jeff Kirsher
parent
ab50a2a430
commit
b04e36bac5
@ -254,6 +254,7 @@ struct e1000_adapter {
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atomic_t tx_fifo_stall;
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bool pcix_82544;
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bool detect_tx_hung;
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bool dump_buffers;
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/* RX */
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bool (*clean_rx)(struct e1000_adapter *adapter,
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@ -895,6 +895,11 @@ struct e1000_ffvt_entry {
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#define E1000_FCRTL 0x02160 /* Flow Control Receive Threshold Low - RW */
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#define E1000_FCRTH 0x02168 /* Flow Control Receive Threshold High - RW */
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#define E1000_PSRCTL 0x02170 /* Packet Split Receive Control - RW */
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#define E1000_RDFH 0x02410 /* RX Data FIFO Head - RW */
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#define E1000_RDFT 0x02418 /* RX Data FIFO Tail - RW */
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#define E1000_RDFHS 0x02420 /* RX Data FIFO Head Saved - RW */
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#define E1000_RDFTS 0x02428 /* RX Data FIFO Tail Saved - RW */
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#define E1000_RDFPC 0x02430 /* RX Data FIFO Packet Count - RW */
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#define E1000_RDBAL 0x02800 /* RX Descriptor Base Address Low - RW */
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#define E1000_RDBAH 0x02804 /* RX Descriptor Base Address High - RW */
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#define E1000_RDLEN 0x02808 /* RX Descriptor Length - RW */
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@ -1074,6 +1079,11 @@ struct e1000_ffvt_entry {
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#define E1000_82542_IMC E1000_IMC
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#define E1000_82542_RCTL E1000_RCTL
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#define E1000_82542_RDTR 0x00108
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#define E1000_82542_RDFH E1000_RDFH
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#define E1000_82542_RDFT E1000_RDFT
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#define E1000_82542_RDFHS E1000_RDFHS
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#define E1000_82542_RDFTS E1000_RDFTS
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#define E1000_82542_RDFPC E1000_RDFPC
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#define E1000_82542_RDBAL 0x00110
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#define E1000_82542_RDBAH 0x00114
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#define E1000_82542_RDLEN 0x00118
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@ -3239,6 +3239,228 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
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return NETDEV_TX_OK;
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}
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#define NUM_REGS 38 /* 1 based count */
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static void e1000_regdump(struct e1000_adapter *adapter)
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{
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struct e1000_hw *hw = &adapter->hw;
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u32 regs[NUM_REGS];
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u32 *regs_buff = regs;
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int i = 0;
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char *reg_name[] = {
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"CTRL", "STATUS",
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"RCTL", "RDLEN", "RDH", "RDT", "RDTR",
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"TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
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"TIDV", "TXDCTL", "TADV", "TARC0",
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"TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
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"TXDCTL1", "TARC1",
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"CTRL_EXT", "ERT", "RDBAL", "RDBAH",
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"TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
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"RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
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};
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regs_buff[0] = er32(CTRL);
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regs_buff[1] = er32(STATUS);
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regs_buff[2] = er32(RCTL);
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regs_buff[3] = er32(RDLEN);
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regs_buff[4] = er32(RDH);
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regs_buff[5] = er32(RDT);
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regs_buff[6] = er32(RDTR);
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regs_buff[7] = er32(TCTL);
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regs_buff[8] = er32(TDBAL);
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regs_buff[9] = er32(TDBAH);
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regs_buff[10] = er32(TDLEN);
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regs_buff[11] = er32(TDH);
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regs_buff[12] = er32(TDT);
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regs_buff[13] = er32(TIDV);
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regs_buff[14] = er32(TXDCTL);
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regs_buff[15] = er32(TADV);
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regs_buff[16] = er32(TARC0);
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regs_buff[17] = er32(TDBAL1);
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regs_buff[18] = er32(TDBAH1);
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regs_buff[19] = er32(TDLEN1);
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regs_buff[20] = er32(TDH1);
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regs_buff[21] = er32(TDT1);
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regs_buff[22] = er32(TXDCTL1);
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regs_buff[23] = er32(TARC1);
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regs_buff[24] = er32(CTRL_EXT);
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regs_buff[25] = er32(ERT);
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regs_buff[26] = er32(RDBAL0);
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regs_buff[27] = er32(RDBAH0);
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regs_buff[28] = er32(TDFH);
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regs_buff[29] = er32(TDFT);
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regs_buff[30] = er32(TDFHS);
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regs_buff[31] = er32(TDFTS);
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regs_buff[32] = er32(TDFPC);
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regs_buff[33] = er32(RDFH);
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regs_buff[34] = er32(RDFT);
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regs_buff[35] = er32(RDFHS);
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regs_buff[36] = er32(RDFTS);
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regs_buff[37] = er32(RDFPC);
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pr_info("Register dump\n");
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for (i = 0; i < NUM_REGS; i++) {
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printk(KERN_INFO "%-15s %08x\n",
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reg_name[i], regs_buff[i]);
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}
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}
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/*
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* e1000_dump: Print registers, tx ring and rx ring
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*/
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static void e1000_dump(struct e1000_adapter *adapter)
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{
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/* this code doesn't handle multiple rings */
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struct e1000_tx_ring *tx_ring = adapter->tx_ring;
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struct e1000_rx_ring *rx_ring = adapter->rx_ring;
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int i;
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if (!netif_msg_hw(adapter))
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return;
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/* Print Registers */
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e1000_regdump(adapter);
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/*
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* transmit dump
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*/
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pr_info("TX Desc ring0 dump\n");
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/* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
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*
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* Legacy Transmit Descriptor
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* +--------------------------------------------------------------+
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* 0 | Buffer Address [63:0] (Reserved on Write Back) |
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* +--------------------------------------------------------------+
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* 8 | Special | CSS | Status | CMD | CSO | Length |
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* +--------------------------------------------------------------+
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* 63 48 47 36 35 32 31 24 23 16 15 0
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*
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* Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
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* 63 48 47 40 39 32 31 16 15 8 7 0
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* +----------------------------------------------------------------+
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* 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
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* +----------------------------------------------------------------+
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* 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
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* +----------------------------------------------------------------+
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* 63 48 47 40 39 36 35 32 31 24 23 20 19 0
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*
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* Extended Data Descriptor (DTYP=0x1)
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* +----------------------------------------------------------------+
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* 0 | Buffer Address [63:0] |
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* +----------------------------------------------------------------+
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* 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
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* +----------------------------------------------------------------+
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* 63 48 47 40 39 36 35 32 31 24 23 20 19 0
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*/
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printk(KERN_INFO "Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ]"
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" leng ntw timestmp bi->skb\n");
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printk(KERN_INFO "Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ]"
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" leng ntw timestmp bi->skb\n");
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if (!netif_msg_tx_done(adapter))
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goto rx_ring_summary;
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for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
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struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
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struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
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struct my_u { u64 a; u64 b; };
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struct my_u *u = (struct my_u *)tx_desc;
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printk(KERN_INFO "T%c[0x%03X] %016llX %016llX %016llX %04X %3X "
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"%016llX %p",
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((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
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le64_to_cpu(u->a), le64_to_cpu(u->b),
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(u64)buffer_info->dma, buffer_info->length,
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buffer_info->next_to_watch, (u64)buffer_info->time_stamp,
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buffer_info->skb);
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if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
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printk(KERN_CONT" NTC/U\n");
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else if (i == tx_ring->next_to_use)
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printk(KERN_CONT " NTU\n");
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else if (i == tx_ring->next_to_clean)
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printk(KERN_CONT " NTC\n");
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else
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printk(KERN_CONT "\n");
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if (netif_msg_pktdata(adapter) && buffer_info->dma != 0)
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print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
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16, 1, phys_to_virt(buffer_info->dma),
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buffer_info->length, true);
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}
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rx_ring_summary:
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/*
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* receive dump
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*/
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pr_info("\nRX Desc ring dump\n");
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/* Legacy Receive Descriptor Format
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*
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* +-----------------------------------------------------+
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* | Buffer Address [63:0] |
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* +-----------------------------------------------------+
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* | VLAN Tag | Errors | Status 0 | Packet csum | Length |
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* +-----------------------------------------------------+
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* 63 48 47 40 39 32 31 16 15 0
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*/
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printk(KERN_INFO "R[desc] [address 63:0 ] [vl er S cks ln] "
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"[bi->dma ] [bi->skb]\n");
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if (!netif_msg_rx_status(adapter))
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goto exit;
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for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
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struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
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struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
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struct my_u { u64 a; u64 b; };
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struct my_u *u = (struct my_u *)rx_desc;
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printk(KERN_INFO "R[0x%03X] %016llX %016llX %016llX %p",
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i, le64_to_cpu(u->a), le64_to_cpu(u->b),
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(u64)buffer_info->dma, buffer_info->skb);
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if (i == rx_ring->next_to_use)
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printk(KERN_CONT " NTU\n");
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else if (i == rx_ring->next_to_clean)
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printk(KERN_CONT " NTC\n");
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else
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printk(KERN_CONT "\n");
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if (netif_msg_pktdata(adapter))
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print_hex_dump(KERN_INFO, "",
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DUMP_PREFIX_ADDRESS, 16, 1,
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phys_to_virt(buffer_info->dma),
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buffer_info->length, true);
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} /* for */
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/* dump the descriptor caches */
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/* rx */
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printk(KERN_INFO "e1000: Rx descriptor cache in 64bit format\n");
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for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
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printk(KERN_INFO "R%04X: %08X|%08X %08X|%08X\n",
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i,
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readl(adapter->hw.hw_addr + i+4),
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readl(adapter->hw.hw_addr + i),
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readl(adapter->hw.hw_addr + i+12),
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readl(adapter->hw.hw_addr + i+8));
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}
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/* tx */
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printk(KERN_INFO "e1000: Tx descriptor cache in 64bit format\n");
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for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
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printk(KERN_INFO "T%04X: %08X|%08X %08X|%08X\n",
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i,
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readl(adapter->hw.hw_addr + i+4),
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readl(adapter->hw.hw_addr + i),
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readl(adapter->hw.hw_addr + i+12),
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readl(adapter->hw.hw_addr + i+8));
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}
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exit:
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return;
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}
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/**
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* e1000_tx_timeout - Respond to a Tx Hang
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* @netdev: network interface device structure
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@ -3260,6 +3482,7 @@ static void e1000_reset_task(struct work_struct *work)
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if (test_bit(__E1000_DOWN, &adapter->flags))
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return;
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e_err(drv, "Reset adapter\n");
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e1000_reinit_safe(adapter);
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}
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@ -3677,6 +3900,7 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
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eop,
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jiffies,
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eop_desc->upper.fields.status);
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e1000_dump(adapter);
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netif_stop_queue(netdev);
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}
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}
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