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[PATCH 06/15] drm/xe/xe2: Handle fused-off CCS engines X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Matt Roper Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On 11.08.2023 09:06, Lucas De Marchi wrote: > From: Matt Roper > > On Xe2 platforms, availability of the CCS engines is reflected in the > FUSE4 register. > > Bspec: 62483 > Cc: Balasubramani Vivekanandan > Signed-off-by: Matt Roper > Signed-off-by: Lucas De Marchi > --- > drivers/gpu/drm/xe/regs/xe_gt_regs.h | 1 + > drivers/gpu/drm/xe/xe_hw_engine.c | 29 +++++++++++++++++++++++++++- > 2 files changed, 29 insertions(+), 1 deletion(-) Reviewed-by: Balasubramani Vivekanandan Regards, Bala > > diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h > index 5bc6c7fa4759f..b8dde495b8a32 100644 > --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h > +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h > @@ -154,6 +154,7 @@ > > /* 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) > diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c > index b8fcc6e985cfc..d2c358e711cb6 100644 > --- a/drivers/gpu/drm/xe/xe_hw_engine.c > +++ b/drivers/gpu/drm/xe/xe_hw_engine.c > @@ -529,7 +529,7 @@ 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); > > @@ -556,6 +556,33 @@ 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; > -- > 2.40.1 >