Commit 53497182 authored by Matt Roper's avatar Matt Roper Committed by Rodrigo Vivi
Browse files

drm/xe/xe2: Handle fused-off CCS engines 



On Xe2 platforms, availability of the CCS engines is reflected in the
FUSE4 register.

Bspec: 62483
Cc: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Signed-off-by: default avatarLucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: default avatarMatt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent c5fa5814

drivers/gpu/drm/xe/regs/xe_gt_regs.h

+1 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ 


/* Fuse readout registers for GT */

#define XEHP_FUSE4				XE_REG(0x9114)

#define   CCS_EN_MASK				REG_GENMASK(19, 16)

#define   GT_L3_EXC_MASK			REG_GENMASK(6, 4)



#define GT_VEBOX_VDBOX_DISABLE			XE_REG(0x9140)

drivers/gpu/drm/xe/xe_hw_engine.c

+28 −1
Original line number Diff line number Diff line
@@ -550,7 +550,7 @@ static void read_copy_fuses(struct xe_gt *gt) 
	}

}



static void read_compute_fuses(struct xe_gt *gt)

static void read_compute_fuses_from_dss(struct xe_gt *gt)

{

	struct xe_device *xe = gt_to_xe(gt);
@@ -577,6 +577,33 @@ static void read_compute_fuses(struct xe_gt *gt) 
	}

}



static void read_compute_fuses_from_reg(struct xe_gt *gt)

{

	struct xe_device *xe = gt_to_xe(gt);

	u32 ccs_mask;



	ccs_mask = xe_mmio_read32(gt, XEHP_FUSE4);

	ccs_mask = REG_FIELD_GET(CCS_EN_MASK, ccs_mask);



	for (int i = XE_HW_ENGINE_CCS0, j = 0; i <= XE_HW_ENGINE_CCS3; ++i, ++j) {

		if (!(gt->info.engine_mask & BIT(i)))

			continue;



		if ((ccs_mask & BIT(j)) == 0) {

			gt->info.engine_mask &= ~BIT(i);

			drm_info(&xe->drm, "ccs%u fused off\n", j);

		}

	}

}



static void read_compute_fuses(struct xe_gt *gt)

{

	if (GRAPHICS_VER(gt_to_xe(gt)) >= 20)

		read_compute_fuses_from_reg(gt);

	else

		read_compute_fuses_from_dss(gt);

}



int xe_hw_engines_init_early(struct xe_gt *gt)

{

	int i;