Commit 14380054 authored by Lucas De Marchi's avatar Lucas De Marchi Committed by Rodrigo Vivi
Browse files

drm/xe/rtp: Add match helper for gslice fused off 



Add match helper to detect when the first gslice is fused off, as needed
by future workarounds.

v2:
  - Add warning if called on a platform without geometry pipeline
    (Matt Roper)
  - Hardcode 4 as the number of gslices, which matches all the currently
    supported platforms. PVC doesn't have geometry pipeline and
    shouldn't use this function (Matt Roper)

Signed-off-by: default avatarLucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20230314003012.2600353-2-lucas.demarchi@intel.com


Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent 69db25e4

drivers/gpu/drm/xe/xe_rtp.c

+16 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <drm/xe_drm.h>



#include "xe_gt.h"

#include "xe_gt_topology.h"

#include "xe_macros.h"

#include "xe_reg_sr.h"
@@ -170,3 +171,18 @@ bool xe_rtp_match_first_render_or_compute(const struct xe_gt *gt, 
	return render_compute_mask &&

		hwe->engine_id == __ffs(render_compute_mask);

}



bool xe_rtp_match_first_gslice_fused_off(const struct xe_gt *gt,

					 const struct xe_hw_engine *hwe)

{

	unsigned int dss_per_gslice = 4;

	unsigned int dss;



	if (drm_WARN(&gt_to_xe(gt)->drm, !gt->fuse_topo.g_dss_mask,

		     "Checking gslice for platform without geometry pipeline\n"))

		return false;



	dss = xe_dss_mask_group_ffs(gt->fuse_topo.g_dss_mask, 0, 0);



	return dss >= dss_per_gslice;

}

drivers/gpu/drm/xe/xe_rtp.h

+11 −0
Original line number Diff line number Diff line
@@ -427,4 +427,15 @@ bool xe_rtp_match_even_instance(const struct xe_gt *gt, 
bool xe_rtp_match_first_render_or_compute(const struct xe_gt *gt,

					  const struct xe_hw_engine *hwe);



/*

 * xe_rtp_match_first_gslice_fused_off - Match when first gslice is fused off

 *

 * @gt: GT structure

 * @hwe: Engine instance

 *

 * Returns: true if first gslice is fused off, false otherwise.

 */

bool xe_rtp_match_first_gslice_fused_off(const struct xe_gt *gt,

					 const struct xe_hw_engine *hwe);



#endif