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| author | Gao, Fred <fred.gao@intel.com> | 2019-07-18 04:39:01 +0300 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2019-08-13 12:55:06 +0300 |
| commit | 4f870f1fba3443705389d9a2405c10c1cf73f2e0 (patch) | |
| tree | c994ebcc4ee8b13ae2b4a70d60dfc6f4f55f0e86 /drivers/gpu/drm/i915/gvt/cmd_parser.c | |
| parent | 8cfbca7848ffe3f5d49155748814cd68a774e449 (diff) | |
| download | linux-4f870f1fba3443705389d9a2405c10c1cf73f2e0.tar.xz | |
drm/i915/gvt: Utility for valid command length check
Add utility for valid command length check.
v2: Add F_VAL_CONST flag to identify the value is const
although LEN maybe variable. (Zhenyu)
v3: unused code removal, flag rename/conflict. (Zhenyu)
v4: redefine F_IP_ADVANCE_CUSTOM and move the check function to
next patch. (Zhenyu)
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Gao, Fred <fred.gao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/cmd_parser.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/cmd_parser.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c index 6ea88270c818..5f00e5d04929 100644 --- a/drivers/gpu/drm/i915/gvt/cmd_parser.c +++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c @@ -378,17 +378,17 @@ struct cmd_info { const char *name; u32 opcode; -#define F_LEN_MASK (1U<<0) +#define F_LEN_MASK 3U #define F_LEN_CONST 1U #define F_LEN_VAR 0U +/* value is const although LEN maybe variable */ +#define F_LEN_VAR_FIXED (1<<1) /* * command has its own ip advance logic * e.g. MI_BATCH_START, MI_BATCH_END */ -#define F_IP_ADVANCE_CUSTOM (1<<1) - -#define F_POST_HANDLE (1<<2) +#define F_IP_ADVANCE_CUSTOM (1<<2) u32 flag; #define R_RCS BIT(RCS0) @@ -418,9 +418,12 @@ struct cmd_info { * flag == F_LEN_VAR : length bias bits * Note: length is in DWord */ - u8 len; + u32 len; parser_cmd_handler handler; + + /* valid length in DWord */ + u32 valid_len; }; struct cmd_entry { @@ -1912,7 +1915,7 @@ static const struct cmd_info cmd_info[] = { {"MI_RS_CONTEXT", OP_MI_RS_CONTEXT, F_LEN_CONST, R_RCS, D_ALL, 0, 1, NULL}, - {"MI_DISPLAY_FLIP", OP_MI_DISPLAY_FLIP, F_LEN_VAR | F_POST_HANDLE, + {"MI_DISPLAY_FLIP", OP_MI_DISPLAY_FLIP, F_LEN_VAR, R_RCS | R_BCS, D_ALL, 0, 8, cmd_handler_mi_display_flip}, {"MI_SEMAPHORE_MBOX", OP_MI_SEMAPHORE_MBOX, F_LEN_VAR, R_ALL, D_ALL, |