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Commit d728c8ef authored by Brad Volkin's avatar Brad Volkin Committed by Daniel Vetter
Browse files

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: default avatarBrad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 114d4f70

drivers/gpu/drm/i915/i915_cmd_parser.c

+19 −0
Original line number Diff line number Diff line
@@ -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;

}

drivers/gpu/drm/i915/i915_dma.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

drivers/gpu/drm/i915/i915_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -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,

include/uapi/drm/i915_drm.h

+1 −0
Original line number Diff line number Diff line
@@ -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;