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Message-Id: <1600755385-21789-1-git-send-email-vasundhara-v.volam@broadcom.com>
Date: Tue, 22 Sep 2020 11:46:25 +0530
From: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
To: mkubecek@...e.cz, davem@...emloft.net
Cc: netdev@...r.kernel.org, kuba@...nel.org, michael.chan@...adcom.com,
edwin.peer@...adcom.com, andrew.gospodarek@...adcom.com,
andrew@...n.ch, Vasundhara Volam <vasundhara-v.volam@...adcom.com>
Subject: [PATCH v2 ethtool] bnxt: Add Broadcom driver support.
This patch adds the initial support for parsing registers dumped
by the Broadcom driver. Currently, PXP and PCIe registers are
parsed.
Reviewed-by: Andy Gospodarek <gospo@...adcom.com>
Reviewed-by: Edwin Peer <edwin.peer@...adcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
---
v2:
- Fix format specifiers in bnxt_pcie_stats[] array.
- Use width format specifier instead of spaces in register names to
align the data.
- Add '0x' in error log messages to clarify the value is in hex.
---
Makefile.am | 2 +-
bnxt.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ethtool.c | 1 +
internal.h | 3 +++
4 files changed, 91 insertions(+), 1 deletion(-)
create mode 100644 bnxt.c
diff --git a/Makefile.am b/Makefile.am
index 0e237d0..e3e311d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -17,7 +17,7 @@ ethtool_SOURCES += \
smsc911x.c at76c50x-usb.c sfc.c stmmac.c \
sff-common.c sff-common.h sfpid.c sfpdiag.c \
ixgbevf.c tse.c vmxnet3.c qsfp.c qsfp.h fjes.c lan78xx.c \
- igc.c qsfp-dd.c qsfp-dd.h
+ igc.c qsfp-dd.c qsfp-dd.h bnxt.c
endif
if ENABLE_BASH_COMPLETION
diff --git a/bnxt.c b/bnxt.c
new file mode 100644
index 0000000..e449abd
--- /dev/null
+++ b/bnxt.c
@@ -0,0 +1,86 @@
+/* Code to dump registers for NetXtreme-E/NetXtreme-C Broadcom devices.
+ *
+ * Copyright (c) 2020 Broadcom Inc.
+ */
+#include <stdio.h>
+#include "internal.h"
+
+#define BNXT_PXP_REG_LEN 0x3110
+#define BNXT_PCIE_STATS_LEN (12 * sizeof(u64))
+
+struct bnxt_pcie_stat {
+ const char *name;
+ u16 offset;
+ u8 size;
+ const char *format;
+};
+
+static const struct bnxt_pcie_stat bnxt_pcie_stats[] = {
+ { .name = "PL Signal integrity errors", .offset = 0, .size = 4, .format = "%llu" },
+ { .name = "DL Signal integrity errors", .offset = 4, .size = 4, .format = "%llu" },
+ { .name = "TLP Signal integrity errors", .offset = 8, .size = 4, .format = "%llu" },
+ { .name = "Link integrity", .offset = 12, .size = 4, .format = "%llu" },
+ { .name = "TX TLP traffic rate", .offset = 16, .size = 4, .format = "%llu" },
+ { .name = "RX TLP traffic rate", .offset = 20, .size = 4, .format = "%llu" },
+ { .name = "TX DLLP traffic rate", .offset = 24, .size = 4, .format = "%llu" },
+ { .name = "RX DLLP traffic rate", .offset = 28, .size = 4, .format = "%llu" },
+ { .name = "Equalization Phase 0 time(ms)", .offset = 33, .size = 1, .format = "0x%llx" },
+ { .name = "Equalization Phase 1 time(ms)", .offset = 32, .size = 1, .format = "0x%llx" },
+ { .name = "Equalization Phase 2 time(ms)", .offset = 35, .size = 1, .format = "0x%llx" },
+ { .name = "Equalization Phase 3 time(ms)", .offset = 34, .size = 1, .format = "0x%llx" },
+ { .name = "PHY LTSSM Histogram 0", .offset = 36, .size = 2, .format = "0x%llx"},
+ { .name = "PHY LTSSM Histogram 1", .offset = 38, .size = 2, .format = "0x%llx"},
+ { .name = "PHY LTSSM Histogram 2", .offset = 40, .size = 2, .format = "0x%llx"},
+ { .name = "PHY LTSSM Histogram 3", .offset = 42, .size = 2, .format = "0x%llx"},
+ { .name = "Recovery Histogram 0", .offset = 44, .size = 2, .format = "0x%llx"},
+ { .name = "Recovery Histogram 1", .offset = 46, .size = 2, .format = "0x%llx"},
+};
+
+int bnxt_dump_regs(struct ethtool_drvinfo *info __maybe_unused, struct ethtool_regs *regs)
+{
+ const struct bnxt_pcie_stat *stats = bnxt_pcie_stats;
+ u16 *pcie_stats;
+ u64 pcie_stat;
+ u32 reg, i;
+
+ if (regs->len < BNXT_PXP_REG_LEN) {
+ fprintf(stdout, "Length too short, expected at least 0x%x\n",
+ BNXT_PXP_REG_LEN);
+ return -1;
+ }
+
+ fprintf(stdout, "PXP Registers\n");
+ fprintf(stdout, "Offset\tValue\n");
+ fprintf(stdout, "------\t-------\n");
+ for (i = 0; i < BNXT_PXP_REG_LEN; i += sizeof(reg)) {
+ memcpy(®, ®s->data[i], sizeof(reg));
+ if (reg)
+ fprintf(stdout, "0x%04x\t0x%08x\n", i, reg);
+ }
+ fprintf(stdout, "\n");
+
+ if (!regs->version)
+ return 0;
+
+ if (regs->len < (BNXT_PXP_REG_LEN + BNXT_PCIE_STATS_LEN)) {
+ fprintf(stdout, "Length is too short, expected 0x%lx\n",
+ BNXT_PXP_REG_LEN + BNXT_PCIE_STATS_LEN);
+ return -1;
+ }
+
+ pcie_stats = (u16 *)(regs->data + BNXT_PXP_REG_LEN);
+ fprintf(stdout, "PCIe statistics:\n");
+ fprintf(stdout, "----------------\n");
+ for (i = 0; i < ARRAY_SIZE(bnxt_pcie_stats); i++) {
+ pcie_stat = 0;
+ memcpy(&pcie_stat, &pcie_stats[stats[i].offset],
+ stats[i].size * sizeof(u16));
+
+ fprintf(stdout, "%-30s : ", stats[i].name);
+ fprintf(stdout, stats[i].format, pcie_stat);
+ fprintf(stdout, "\n");
+ }
+
+ fprintf(stdout, "\n");
+ return 0;
+}
diff --git a/ethtool.c b/ethtool.c
index ab9b457..89bd15c 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -1072,6 +1072,7 @@ static const struct {
{ "dsa", dsa_dump_regs },
{ "fec", fec_dump_regs },
{ "igc", igc_dump_regs },
+ { "bnxt_en", bnxt_dump_regs },
#endif
};
diff --git a/internal.h b/internal.h
index d096a28..935ebac 100644
--- a/internal.h
+++ b/internal.h
@@ -396,4 +396,7 @@ int fec_dump_regs(struct ethtool_drvinfo *info, struct ethtool_regs *regs);
/* Intel(R) Ethernet Controller I225-LM/I225-V adapter family */
int igc_dump_regs(struct ethtool_drvinfo *info, struct ethtool_regs *regs);
+/* Broadcom Ethernet Controller */
+int bnxt_dump_regs(struct ethtool_drvinfo *info, struct ethtool_regs *regs);
+
#endif /* ETHTOOL_INTERNAL_H__ */
--
1.8.3.1
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