Commit fe40900f authored by Roland Dreier's avatar Roland Dreier

mlx4_core: Check firmware command interface revision

HCA firmware with incompatible changes to the FW commmand interface is
coming soon.  Add a check of the interface revision during
initialization and bail out if the firmware advertises a revision that
the driver doesn't know about.  This will avoid strange failures later
if the driver goes on using the wrong interface revision. 
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 3e1db334
......@@ -37,6 +37,10 @@
#include "fw.h"
#include "icm.h"
enum {
MLX4_COMMAND_INTERFACE_REV = 1
};
extern void __buggy_use_of_MLX4_GET(void);
extern void __buggy_use_of_MLX4_PUT(void);
......@@ -452,10 +456,12 @@ int mlx4_QUERY_FW(struct mlx4_dev *dev)
u32 *outbox;
int err = 0;
u64 fw_ver;
u16 cmd_if_rev;
u8 lg;
#define QUERY_FW_OUT_SIZE 0x100
#define QUERY_FW_VER_OFFSET 0x00
#define QUERY_FW_CMD_IF_REV_OFFSET 0x0a
#define QUERY_FW_MAX_CMD_OFFSET 0x0f
#define QUERY_FW_ERR_START_OFFSET 0x30
#define QUERY_FW_ERR_SIZE_OFFSET 0x38
......@@ -484,14 +490,29 @@ int mlx4_QUERY_FW(struct mlx4_dev *dev)
((fw_ver & 0xffff0000ull) >> 16) |
((fw_ver & 0x0000ffffull) << 16);
MLX4_GET(cmd_if_rev, outbox, QUERY_FW_CMD_IF_REV_OFFSET);
if (cmd_if_rev != MLX4_COMMAND_INTERFACE_REV) {
mlx4_err(dev, "Installed FW has unsupported "
"command interface revision %d.\n",
cmd_if_rev);
mlx4_err(dev, "(Installed FW version is %d.%d.%03d)\n",
(int) (dev->caps.fw_ver >> 32),
(int) (dev->caps.fw_ver >> 16) & 0xffff,
(int) dev->caps.fw_ver & 0xffff);
mlx4_err(dev, "This driver version supports only revision %d.\n",
MLX4_COMMAND_INTERFACE_REV);
err = -ENODEV;
goto out;
}
MLX4_GET(lg, outbox, QUERY_FW_MAX_CMD_OFFSET);
cmd->max_cmds = 1 << lg;
mlx4_dbg(dev, "FW version %d.%d.%03d, max commands %d\n",
mlx4_dbg(dev, "FW version %d.%d.%03d (cmd intf rev %d), max commands %d\n",
(int) (dev->caps.fw_ver >> 32),
(int) (dev->caps.fw_ver >> 16) & 0xffff,
(int) dev->caps.fw_ver & 0xffff,
cmd->max_cmds);
cmd_if_rev, cmd->max_cmds);
MLX4_GET(fw->catas_offset, outbox, QUERY_FW_ERR_START_OFFSET);
MLX4_GET(fw->catas_size, outbox, QUERY_FW_ERR_SIZE_OFFSET);
......
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