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Date: Sat, 8 Jan 2022 20:38:47 -0500
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, kuba@...nel.org, gospo@...adcom.com
Subject: [PATCH net-next 3/4] bnxt_en: use firmware provided max timeout for messages
From: Edwin Peer <edwin.peer@...adcom.com>
Some older devices cannot accommodate the 40 seconds timeout
cap for long running commands (such as NVRAM commands) due to
hardware limitations. Allow these devices to request more time for
these long running commands, but print a warning, since the longer
timeout may cause the hung task watchdog to trigger. In the case of a
firmware update operation, this is preferable to failing outright.
Fixes: 881d8353b05e ("bnxt_en: Add an upper bound for all firmware command timeouts.")
Signed-off-by: Edwin Peer <edwin.peer@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 6 ++++++
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 3 ++-
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 6 +++---
drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c | 2 +-
drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.h | 4 ++--
5 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index cac06f88a275..a5539eb26808 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8034,6 +8034,12 @@ static int bnxt_hwrm_ver_get(struct bnxt *bp)
bp->hwrm_cmd_timeout = le16_to_cpu(resp->def_req_timeout);
if (!bp->hwrm_cmd_timeout)
bp->hwrm_cmd_timeout = DFLT_HWRM_CMD_TIMEOUT;
+ bp->hwrm_cmd_max_timeout = le16_to_cpu(resp->max_req_timeout) * 1000;
+ if (!bp->hwrm_cmd_max_timeout)
+ bp->hwrm_cmd_max_timeout = HWRM_CMD_MAX_TIMEOUT;
+ else if (bp->hwrm_cmd_max_timeout > HWRM_CMD_MAX_TIMEOUT)
+ netdev_warn(bp->dev, "Device requests max timeout of %d seconds, may trigger hung task watchdog\n",
+ bp->hwrm_cmd_max_timeout / 1000);
if (resp->hwrm_intf_maj_8b >= 1) {
bp->hwrm_max_req_len = le16_to_cpu(resp->max_req_win_len);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 5ec251a1100f..0da68dc35c69 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1987,7 +1987,8 @@ struct bnxt {
u16 hwrm_max_req_len;
u16 hwrm_max_ext_req_len;
- int hwrm_cmd_timeout;
+ unsigned int hwrm_cmd_timeout;
+ unsigned int hwrm_cmd_max_timeout;
struct mutex hwrm_cmd_lock; /* serialize hwrm messages */
struct hwrm_ver_get_output ver_resp;
#define FW_VER_STR_LEN 32
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 46859d9a01eb..04853d52d1b3 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -31,9 +31,9 @@
#include "bnxt_nvm_defs.h" /* NVRAM content constant and structure defs */
#include "bnxt_fw_hdr.h" /* Firmware hdr constant and structure defs */
#include "bnxt_coredump.h"
-#define FLASH_NVRAM_TIMEOUT ((HWRM_CMD_TIMEOUT) * 100)
-#define FLASH_PACKAGE_TIMEOUT ((HWRM_CMD_TIMEOUT) * 200)
-#define INSTALL_PACKAGE_TIMEOUT ((HWRM_CMD_TIMEOUT) * 200)
+#define FLASH_NVRAM_TIMEOUT (bp->hwrm_cmd_max_timeout)
+#define FLASH_PACKAGE_TIMEOUT (bp->hwrm_cmd_max_timeout)
+#define INSTALL_PACKAGE_TIMEOUT (bp->hwrm_cmd_max_timeout)
static u32 bnxt_get_msglevel(struct net_device *dev)
{
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
index f75b2de8a14b..4c4027cfb322 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
@@ -529,7 +529,7 @@ static int __hwrm_send(struct bnxt *bp, struct bnxt_hwrm_ctx *ctx)
}
/* Limit timeout to an upper limit */
- timeout = min_t(uint, ctx->timeout, HWRM_CMD_MAX_TIMEOUT);
+ timeout = min(ctx->timeout, bp->hwrm_cmd_max_timeout ?: HWRM_CMD_MAX_TIMEOUT);
/* convert timeout to usec */
timeout *= 1000;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.h
index 4d17f0d5363b..08258d201086 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.h
@@ -58,11 +58,11 @@ void hwrm_update_token(struct bnxt *bp, u16 seq, enum bnxt_hwrm_wait_state s);
#define BNXT_HWRM_MAX_REQ_LEN (bp->hwrm_max_req_len)
#define BNXT_HWRM_SHORT_REQ_LEN sizeof(struct hwrm_short_input)
-#define HWRM_CMD_MAX_TIMEOUT 40000
+#define HWRM_CMD_MAX_TIMEOUT 40000U
#define SHORT_HWRM_CMD_TIMEOUT 20
#define HWRM_CMD_TIMEOUT (bp->hwrm_cmd_timeout)
#define HWRM_RESET_TIMEOUT ((HWRM_CMD_TIMEOUT) * 4)
-#define HWRM_COREDUMP_TIMEOUT ((HWRM_CMD_TIMEOUT) * 12)
+#define HWRM_COREDUMP_TIMEOUT (bp->hwrm_cmd_max_timeout)
#define BNXT_HWRM_TARGET 0xffff
#define BNXT_HWRM_NO_CMPL_RING -1
#define BNXT_HWRM_REQ_MAX_SIZE 128
--
2.18.1
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