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Wait for FW readiness before initializing command interface in mlx5core.

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Before attempting to initialize the command interface we must wait till
the fw_initializing bit is clear.

If we fail to meet this condition the hardware will drop our
configuration, specifically the descriptors page address.  This scenario
can happen when the firmware is still executing an FLR flow and did not
finish yet so the driver needs to wait for that to finish.

Linux commits:
6c780a0267b8
b8a92577f4be.

MFC after:	3 days
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2019-10-02 10:53:28 +00:00
parent c84e0068ce
commit 59efbf791d
2 changed files with 39 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
sys/dev/mlx5/device.h
View File

@ -32,8 +32,10 @@
#include <rdma/ib_verbs.h>
#include <dev/mlx5/mlx5_ifc.h>
#define FW_INIT_TIMEOUT_MILI 2000
#define FW_INIT_WAIT_MS 2
#define FW_INIT_TIMEOUT_MILI 2000
#define FW_INIT_WAIT_MS 2
#define FW_PRE_INIT_TIMEOUT_MILI 120000
#define FW_INIT_WARN_MESSAGE_INTERVAL 20000
#if defined(__LITTLE_ENDIAN)
#define MLX5_SET_HOST_ENDIANNESS 0

42
sys/dev/mlx5/mlx5_core/mlx5_main.c
View File

@ -676,19 +676,33 @@ static inline int fw_initializing(struct mlx5_core_dev *dev)
return ioread32be(&dev->iseg->initializing) >> 31;
}
static int wait_fw_init(struct mlx5_core_dev *dev, u32 max_wait_mili)
static int wait_fw_init(struct mlx5_core_dev *dev, u32 max_wait_mili,
u32 warn_time_mili)
{
u64 end = jiffies + msecs_to_jiffies(max_wait_mili);
int warn = jiffies + msecs_to_jiffies(warn_time_mili);
int end = jiffies + msecs_to_jiffies(max_wait_mili);
int err = 0;
while (fw_initializing(dev)) {
MPASS(max_wait_mili > warn_time_mili);
while (fw_initializing(dev) == 1) {
if (time_after(jiffies, end)) {
err = -EBUSY;
break;
}
if (warn_time_mili && time_after(jiffies, warn)) {
mlx5_core_warn(dev,
"Waiting for FW initialization, timeout abort in %lu s\n",
jiffies_to_msecs(end - warn) / 1000);
warn = jiffies + msecs_to_jiffies(warn_time_mili);
}
msleep(FW_INIT_WAIT_MS);
}
if (err != 0)
mlx5_core_dbg(dev, "Full initializing bit dword = 0x%x\n",
ioread32be(&dev->iseg->initializing));
return err;
}
@ -994,15 +1008,29 @@ static int mlx5_load_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv,
*/
dev->state = MLX5_DEVICE_STATE_UP;
err = mlx5_cmd_init(dev);
/* wait for firmware to accept initialization segments configurations
*/
err = wait_fw_init(dev, FW_PRE_INIT_TIMEOUT_MILI,
FW_INIT_WARN_MESSAGE_INTERVAL);
if (err) {
mlx5_core_err(dev, "Failed initializing command interface, aborting\n");
dev_err(&dev->pdev->dev,
"Firmware over %d MS in pre-initializing state, aborting\n",
FW_PRE_INIT_TIMEOUT_MILI);
goto out_err;
}
err = wait_fw_init(dev, FW_INIT_TIMEOUT_MILI);
err = mlx5_cmd_init(dev);
if (err) {
mlx5_core_err(dev, "Firmware over %d MS in initializing state, aborting\n", FW_INIT_TIMEOUT_MILI);
mlx5_core_err(dev,
"Failed initializing command interface, aborting\n");
goto out_err;
}
err = wait_fw_init(dev, FW_INIT_TIMEOUT_MILI, 0);
if (err) {
mlx5_core_err(dev,
"Firmware over %d MS in initializing state, aborting\n",
FW_INIT_TIMEOUT_MILI);
goto err_cmd_cleanup;
}