From: Brad Volkin Date: Tue, 18 Feb 2014 18:15:56 +0000 (-0800) Subject: drm/i915: Add a CMD_PARSER_VERSION getparam X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d728c8ef8bea6e81f44933c0237531cda499577e;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Add a CMD_PARSER_VERSION getparam So userspace can query the kernel for command parser support. v2: Add i915_cmd_parser_get_version(), history log, and kerneldoc OTC-Tracker: AXIA-4631 Change-Id: I58af650db9f6753c2dcac9c54ab432fd31db302f Signed-off-by: Brad Volkin Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c index a8f00dbc0dde..bae7c2f33692 100644 --- a/drivers/gpu/drm/i915/i915_cmd_parser.c +++ b/drivers/gpu/drm/i915/i915_cmd_parser.c @@ -896,3 +896,22 @@ int i915_parse_cmds(struct intel_ring_buffer *ring, return ret; } + +/** + * i915_cmd_parser_get_version() - get the cmd parser version number + * + * The cmd parser maintains a simple increasing integer version number suitable + * for passing to userspace clients to determine what operations are permitted. + * + * Return: the current version number of the cmd parser + */ +int i915_cmd_parser_get_version(void) +{ + /* + * Command parser version history + * + * 1. Initial version. Checks batches and reports violations, but leaves + * hardware parsing enabled (so does not allow new use cases). + */ + return 1; +} diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 96177eec0a0e..0b38f88c35f0 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1017,6 +1017,9 @@ static int i915_getparam(struct drm_device *dev, void *data, case I915_PARAM_HAS_EXEC_HANDLE_LUT: value = 1; break; + case I915_PARAM_CMD_PARSER_VERSION: + value = i915_cmd_parser_get_version(); + break; default: DRM_DEBUG("Unknown parameter %d\n", param->param); return -EINVAL; diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 8e1576cf6d63..0801e157a7ff 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2385,6 +2385,7 @@ void i915_get_extra_instdone(struct drm_device *dev, uint32_t *instdone); const char *i915_cache_level_str(int type); /* i915_cmd_parser.c */ +int i915_cmd_parser_get_version(void); void i915_cmd_parser_init_ring(struct intel_ring_buffer *ring); bool i915_needs_cmd_parser(struct intel_ring_buffer *ring); int i915_parse_cmds(struct intel_ring_buffer *ring, diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 126bfaa8bb6b..8a3e4ef00c3d 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -337,6 +337,7 @@ typedef struct drm_i915_irq_wait { #define I915_PARAM_HAS_EXEC_NO_RELOC 25 #define I915_PARAM_HAS_EXEC_HANDLE_LUT 26 #define I915_PARAM_HAS_WT 27 +#define I915_PARAM_CMD_PARSER_VERSION 28 typedef struct drm_i915_getparam { int param;