On Wed, Jun 01, 2022 at 01:48:56PM +0530, Balasubramani Vivekanandan wrote:
> On 23.05.2022 13:45, Matt Roper wrote:
> > As with EU masks, it's easier to store subslice/DSS masks internally in
> > a format that's more natural for the driver to work with, and then only
> > covert into the u8[] uapi form when the query ioctl is invoked. Since
> > the hardware design changed significantly with Xe_HP, we'll use a union
> > to choose between the old "hsw-style" subslice masks or the newer xehp
> > mask. HSW-style masks will be stored in an array of u8's, indexed by
> > slice (there's never more than 6 subslices per slice on older
> > platforms). For Xe_HP and beyond where slices no longer exist, we only
> > need a single bitmask. However we already know that this mask is
> > eventually going to grow too large for a simple u64 to hold, so we'll
> > represent it in a manner that can be operated on by the utilities in
> > linux/bitmap.h.
> >
> > v2:
> > - Fix typo: BIT(s) -> BIT(ss) in gen9_sseu_device_status()
> >
> > v3:
> > - Eliminate sseu->ss_stride and just calculate the stride while
> > specifically handling uapi. (Tvrtko)
> > - Use BITMAP_BITS() macro to refer to size of masks rather than
> > passing I915_MAX_SS_FUSE_BITS directly. (Tvrtko)
> > - Report compute/geometry DSS masks separately when dumping Xe_HP SSEU
> > info. (Tvrtko)
> > - Restore dropped range checks to intel_sseu_has_subslice(). (Tvrtko)
> >
> > v4:
> > - Make the bitmap size macro check the size of the .xehp field rather
> > than the containing union. (Tvrtko)
> > - Don't add GEM_BUG_ON() intel_sseu_has_subslice()'s check for whether
> > slice or subslice ID exceed sseu->max_[sub]slices; various loops
> > in the driver are expected to exceed these, so we should just
> > silently return 'false.'
> >
> > Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
> > Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/gem/i915_gem_context.c | 5 +-
> > drivers/gpu/drm/i915/gt/intel_engine_cs.c | 4 +-
> > drivers/gpu/drm/i915/gt/intel_gt.c | 12 +-
> > drivers/gpu/drm/i915/gt/intel_sseu.c | 261 +++++++++++--------
> > drivers/gpu/drm/i915/gt/intel_sseu.h | 76 ++++--
> > drivers/gpu/drm/i915/gt/intel_sseu_debugfs.c | 30 +--
> > drivers/gpu/drm/i915/gt/intel_workarounds.c | 24 +-
> > drivers/gpu/drm/i915/i915_getparam.c | 3 +-
> > drivers/gpu/drm/i915/i915_query.c | 13 +-
> > 9 files changed, 241 insertions(+), 187 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
> > index ab4c5ab28e4d..a3bb73f5d53b 100644
> > --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
> > +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
> > @@ -1875,6 +1875,7 @@ i915_gem_user_to_context_sseu(struct intel_gt *gt,
> > {
> > const struct sseu_dev_info *device = >->info.sseu;
> > struct drm_i915_private *i915 = gt->i915;
> > + unsigned int dev_subslice_mask = intel_sseu_get_hsw_subslices(device, 0);
> >
> > /* No zeros in any field. */
> > if (!user->slice_mask || !user->subslice_mask ||
> > @@ -1901,7 +1902,7 @@ i915_gem_user_to_context_sseu(struct intel_gt *gt,
> > if (user->slice_mask & ~device->slice_mask)
> > return -EINVAL;
> >
> > - if (user->subslice_mask & ~device->subslice_mask[0])
> > + if (user->subslice_mask & ~dev_subslice_mask)
> > return -EINVAL;
> >
> > if (user->max_eus_per_subslice > device->max_eus_per_subslice)
> > @@ -1915,7 +1916,7 @@ i915_gem_user_to_context_sseu(struct intel_gt *gt,
> > /* Part specific restrictions. */
> > if (GRAPHICS_VER(i915) == 11) {
> > unsigned int hw_s = hweight8(device->slice_mask);
> > - unsigned int hw_ss_per_s = hweight8(device->subslice_mask[0]);
> > + unsigned int hw_ss_per_s = hweight8(dev_subslice_mask);
> > unsigned int req_s = hweight8(context->slice_mask);
> > unsigned int req_ss = hweight8(context->subslice_mask);
> >
> > diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> > index 1adbf34c3632..f0acf8518a51 100644
> > --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> > +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
> > @@ -674,8 +674,8 @@ static void engine_mask_apply_compute_fuses(struct intel_gt *gt)
> > if (GRAPHICS_VER_FULL(i915) < IP_VER(12, 50))
> > return;
> >
> > - ccs_mask = intel_slicemask_from_dssmask(intel_sseu_get_compute_subslices(&info->sseu),
> > - ss_per_ccs);
> > + ccs_mask = intel_slicemask_from_xehp_dssmask(info->sseu.compute_subslice_mask,
> > + ss_per_ccs);
> > /*
> > * If all DSS in a quadrant are fused off, the corresponding CCS
> > * engine is not available for use.
> > diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
> > index 034182f85501..2921f510642f 100644
> > --- a/drivers/gpu/drm/i915/gt/intel_gt.c
> > +++ b/drivers/gpu/drm/i915/gt/intel_gt.c
> > @@ -133,13 +133,6 @@ static const struct intel_mmio_range dg2_lncf_steering_table[] = {
> > {},
> > };
> >
> > -static u16 slicemask(struct intel_gt *gt, int count)
> > -{
> > - u64 dss_mask = intel_sseu_get_subslices(>->info.sseu, 0);
> > -
> > - return intel_slicemask_from_dssmask(dss_mask, count);
> > -}
> > -
> > int intel_gt_init_mmio(struct intel_gt *gt)
> > {
> > struct drm_i915_private *i915 = gt->i915;
> > @@ -155,9 +148,12 @@ int intel_gt_init_mmio(struct intel_gt *gt)
> > */
> > if (HAS_MSLICES(i915)) {
> > gt->info.mslice_mask =
> > - slicemask(gt, GEN_DSS_PER_MSLICE) |
> > + intel_slicemask_from_xehp_dssmask(gt->info.sseu.subslice_mask,
> > + GEN_DSS_PER_MSLICE);
> > + gt->info.mslice_mask |=
> > (intel_uncore_read(gt->uncore, GEN10_MIRROR_FUSE3) &
> > GEN12_MEML3_EN_MASK);
> > +
> > if (!gt->info.mslice_mask) /* should be impossible! */
> > drm_warn(&i915->drm, "mslice mask all zero!\n");
> > }
> > diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.c b/drivers/gpu/drm/i915/gt/intel_sseu.c
> > index 285cfd758bdc..3a721db20290 100644
> > --- a/drivers/gpu/drm/i915/gt/intel_sseu.c
> > +++ b/drivers/gpu/drm/i915/gt/intel_sseu.c
> > @@ -10,15 +10,14 @@
> > #include "intel_gt_regs.h"
> > #include "intel_sseu.h"
> >
> > +#define XEHP_BITMAP_BITS(mask) ((int)BITS_PER_TYPE(typeof(mask.xehp)))
> > +
> > void intel_sseu_set_info(struct sseu_dev_info *sseu, u8 max_slices,
> > u8 max_subslices, u8 max_eus_per_subslice)
> > {
> > sseu->max_slices = max_slices;
> > sseu->max_subslices = max_subslices;
> > sseu->max_eus_per_subslice = max_eus_per_subslice;
> > -
> > - sseu->ss_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
> > - GEM_BUG_ON(sseu->ss_stride > GEN_MAX_SUBSLICE_STRIDE);
> > }
> >
> > unsigned int
> > @@ -26,54 +25,24 @@ intel_sseu_subslice_total(const struct sseu_dev_info *sseu)
> > {
> > unsigned int i, total = 0;
> >
> > - for (i = 0; i < ARRAY_SIZE(sseu->subslice_mask); i++)
> > - total += hweight8(sseu->subslice_mask[i]);
> > -
> > - return total;
> > -}
> > -
> > -static u32
> > -sseu_get_subslices(const struct sseu_dev_info *sseu,
> > - const u8 *subslice_mask, u8 slice)
> > -{
> > - int i, offset = slice * sseu->ss_stride;
> > - u32 mask = 0;
> > -
> > - GEM_BUG_ON(slice >= sseu->max_slices);
> > -
> > - for (i = 0; i < sseu->ss_stride; i++)
> > - mask |= (u32)subslice_mask[offset + i] << i * BITS_PER_BYTE;
> > -
> > - return mask;
> > -}
> > -
> > -u32 intel_sseu_get_subslices(const struct sseu_dev_info *sseu, u8 slice)
> > -{
> > - return sseu_get_subslices(sseu, sseu->subslice_mask, slice);
> > -}
> > + if (sseu->has_xehp_dss)
> > + return bitmap_weight(sseu->subslice_mask.xehp,
> > + XEHP_BITMAP_BITS(sseu->subslice_mask));
> >
> > -static u32 sseu_get_geometry_subslices(const struct sseu_dev_info *sseu)
> > -{
> > - return sseu_get_subslices(sseu, sseu->geometry_subslice_mask, 0);
> > -}
> > + for (i = 0; i < ARRAY_SIZE(sseu->subslice_mask.hsw); i++)
> > + total += hweight8(sseu->subslice_mask.hsw[i]);
> >
> > -u32 intel_sseu_get_compute_subslices(const struct sseu_dev_info *sseu)
> > -{
> > - return sseu_get_subslices(sseu, sseu->compute_subslice_mask, 0);
> > -}
> > -
> > -void intel_sseu_set_subslices(struct sseu_dev_info *sseu, int slice,
> > - u8 *subslice_mask, u32 ss_mask)
> > -{
> > - int offset = slice * sseu->ss_stride;
> > -
> > - memcpy(&subslice_mask[offset], &ss_mask, sseu->ss_stride);
> > + return total;
> > }
> >
> > unsigned int
> > -intel_sseu_subslices_per_slice(const struct sseu_dev_info *sseu, u8 slice)
> > +intel_sseu_get_hsw_subslices(const struct sseu_dev_info *sseu, u8 slice)
> > {
> > - return hweight32(intel_sseu_get_subslices(sseu, slice));
> > + WARN_ON(sseu->has_xehp_dss);
> > + if (WARN_ON(slice >= sseu->max_slices))
> > + return 0;
> > +
> > + return sseu->subslice_mask.hsw[slice];
> > }
> >
> > static u16 sseu_get_eus(const struct sseu_dev_info *sseu, int slice,
> > @@ -147,32 +116,66 @@ int intel_sseu_copy_eumask_to_user(void __user *to,
> > return copy_to_user(to, eu_mask, len);
> > }
> >
> > +/**
> > + * intel_sseu_copy_ssmask_to_user - Copy subslice mask into a userspace buffer
> > + * @to: Pointer to userspace buffer to copy to
> > + * @sseu: SSEU structure containing subslice mask to copy
> > + *
> > + * Copies the subslice mask to a userspace buffer in the format expected by
> > + * the query ioctl's topology queries.
> > + *
> > + * Returns the result of the copy_to_user() operation.
> > + */
> > +int intel_sseu_copy_ssmask_to_user(void __user *to,
> > + const struct sseu_dev_info *sseu)
> > +{
> > + u8 ss_mask[GEN_SS_MASK_SIZE] = {};
> > + int ss_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
> > + int len = sseu->max_slices * ss_stride;
> > + int s, ss, i;
> > +
> > + for (s = 0; s < sseu->max_slices; s++) {
> > + for (ss = 0; ss < sseu->max_subslices; ss++) {
> > + i = s * ss_stride * BITS_PER_BYTE + ss;
> > +
> > + if (!intel_sseu_has_subslice(sseu, s, ss))
> > + continue;
> > +
> > + ss_mask[i / BITS_PER_BYTE] |= BIT(i % BITS_PER_BYTE);
> > + }
> > + }
> > +
> > + return copy_to_user(to, ss_mask, len);
> > +}
> > +
> > static void gen11_compute_sseu_info(struct sseu_dev_info *sseu,
> > - u32 g_ss_en, u32 c_ss_en, u16 eu_en)
> > + u32 ss_en, u16 eu_en)
> > {
> > u32 valid_ss_mask = GENMASK(sseu->max_subslices - 1, 0);
> > int ss;
> >
> > - /* g_ss_en/c_ss_en represent entire subslice mask across all slices */
> > - GEM_BUG_ON(sseu->max_slices * sseu->max_subslices >
> > - sizeof(g_ss_en) * BITS_PER_BYTE);
> > + sseu->slice_mask |= BIT(0);
> > + sseu->subslice_mask.hsw[0] = ss_en & valid_ss_mask;
> > +
> > + for (ss = 0; ss < sseu->max_subslices; ss++)
> > + if (intel_sseu_has_subslice(sseu, 0, ss))
> > + sseu_set_eus(sseu, 0, ss, eu_en);
> > +
> > + sseu->eu_per_subslice = hweight16(eu_en);
> > + sseu->eu_total = compute_eu_total(sseu);
> > +}
> > +
> > +static void xehp_compute_sseu_info(struct sseu_dev_info *sseu,
> > + u16 eu_en)
> > +{
> > + int ss;
> >
> > sseu->slice_mask |= BIT(0);
> >
> > - /*
> > - * XeHP introduces the concept of compute vs geometry DSS. To reduce
> > - * variation between GENs around subslice usage, store a mask for both
> > - * the geometry and compute enabled masks since userspace will need to
> > - * be able to query these masks independently. Also compute a total
> > - * enabled subslice count for the purposes of selecting subslices to
> > - * use in a particular GEM context.
> > - */
> > - intel_sseu_set_subslices(sseu, 0, sseu->compute_subslice_mask,
> > - c_ss_en & valid_ss_mask);
> > - intel_sseu_set_subslices(sseu, 0, sseu->geometry_subslice_mask,
> > - g_ss_en & valid_ss_mask);
> > - intel_sseu_set_subslices(sseu, 0, sseu->subslice_mask,
> > - (g_ss_en | c_ss_en) & valid_ss_mask);
> > + bitmap_or(sseu->subslice_mask.xehp,
> > + sseu->compute_subslice_mask.xehp,
> > + sseu->geometry_subslice_mask.xehp,
> > + XEHP_BITMAP_BITS(sseu->subslice_mask));
> >
> > for (ss = 0; ss < sseu->max_subslices; ss++)
> > if (intel_sseu_has_subslice(sseu, 0, ss))
> > @@ -182,11 +185,31 @@ static void gen11_compute_sseu_info(struct sseu_dev_info *sseu,
> > sseu->eu_total = compute_eu_total(sseu);
> > }
> >
> > +static void
> > +xehp_load_dss_mask(struct intel_uncore *uncore,
> > + intel_sseu_ss_mask_t *ssmask,
> > + int numregs,
> > + ...)
> > +{
> > + va_list argp;
> > + u32 fuse_val[I915_MAX_SS_FUSE_REGS] = {};
> > + int i;
> > +
> > + if (WARN_ON(numregs > I915_MAX_SS_FUSE_REGS))
> > + numregs = I915_MAX_SS_FUSE_REGS;
> > +
> > + va_start(argp, numregs);
> > + for (i = 0; i < numregs; i++)
> > + fuse_val[i] = intel_uncore_read(uncore, va_arg(argp, i915_reg_t));
> > + va_end(argp);
> > +
> > + bitmap_from_arr32(ssmask->xehp, fuse_val, numregs * 32);
> > +}
> > +
> > static void xehp_sseu_info_init(struct intel_gt *gt)
> > {
> > struct sseu_dev_info *sseu = >->info.sseu;
> > struct intel_uncore *uncore = gt->uncore;
> > - u32 g_dss_en, c_dss_en = 0;
> > u16 eu_en = 0;
> > u8 eu_en_fuse;
> > int eu;
> > @@ -200,8 +223,10 @@ static void xehp_sseu_info_init(struct intel_gt *gt)
> > intel_sseu_set_info(sseu, 1, 32, 16);
> > sseu->has_xehp_dss = 1;
> >
> > - g_dss_en = intel_uncore_read(uncore, GEN12_GT_GEOMETRY_DSS_ENABLE);
> > - c_dss_en = intel_uncore_read(uncore, GEN12_GT_COMPUTE_DSS_ENABLE);
> > + xehp_load_dss_mask(uncore, &sseu->geometry_subslice_mask, 1,
> > + GEN12_GT_GEOMETRY_DSS_ENABLE);
> > + xehp_load_dss_mask(uncore, &sseu->compute_subslice_mask, 1,
> > + GEN12_GT_COMPUTE_DSS_ENABLE);
> >
> > eu_en_fuse = intel_uncore_read(uncore, XEHP_EU_ENABLE) & XEHP_EU_ENA_MASK;
> >
> > @@ -209,7 +234,7 @@ static void xehp_sseu_info_init(struct intel_gt *gt)
> > if (eu_en_fuse & BIT(eu))
> > eu_en |= BIT(eu * 2) | BIT(eu * 2 + 1);
> >
> > - gen11_compute_sseu_info(sseu, g_dss_en, c_dss_en, eu_en);
> > + xehp_compute_sseu_info(sseu, eu_en);
> > }
> >
> > static void gen12_sseu_info_init(struct intel_gt *gt)
> > @@ -247,7 +272,7 @@ static void gen12_sseu_info_init(struct intel_gt *gt)
> > if (eu_en_fuse & BIT(eu))
> > eu_en |= BIT(eu * 2) | BIT(eu * 2 + 1);
> >
> > - gen11_compute_sseu_info(sseu, g_dss_en, 0, eu_en);
> > + gen11_compute_sseu_info(sseu, g_dss_en, eu_en);
> >
> > /* TGL only supports slice-level power gating */
> > sseu->has_slice_pg = 1;
> > @@ -279,7 +304,7 @@ static void gen11_sseu_info_init(struct intel_gt *gt)
> > eu_en = ~(intel_uncore_read(uncore, GEN11_EU_DISABLE) &
> > GEN11_EU_DIS_MASK);
> >
> > - gen11_compute_sseu_info(sseu, ss_en, 0, eu_en);
> > + gen11_compute_sseu_info(sseu, ss_en, eu_en);
> >
> > /* ICL has no power gating restrictions. */
> > sseu->has_slice_pg = 1;
> > @@ -291,7 +316,6 @@ static void cherryview_sseu_info_init(struct intel_gt *gt)
> > {
> > struct sseu_dev_info *sseu = >->info.sseu;
> > u32 fuse;
> > - u8 subslice_mask = 0;
> >
> > fuse = intel_uncore_read(gt->uncore, CHV_FUSE_GT);
> >
> > @@ -305,7 +329,7 @@ static void cherryview_sseu_info_init(struct intel_gt *gt)
> > (((fuse & CHV_FGT_EU_DIS_SS0_R1_MASK) >>
> > CHV_FGT_EU_DIS_SS0_R1_SHIFT) << 4);
> >
> > - subslice_mask |= BIT(0);
> > + sseu->subslice_mask.hsw[0] |= BIT(0);
> > sseu_set_eus(sseu, 0, 0, ~disabled_mask & 0xFF);
> > }
> >
> > @@ -316,12 +340,10 @@ static void cherryview_sseu_info_init(struct intel_gt *gt)
> > (((fuse & CHV_FGT_EU_DIS_SS1_R1_MASK) >>
> > CHV_FGT_EU_DIS_SS1_R1_SHIFT) << 4);
> >
> > - subslice_mask |= BIT(1);
> > + sseu->subslice_mask.hsw[0] |= BIT(1);
> > sseu_set_eus(sseu, 0, 1, ~disabled_mask & 0xFF);
> > }
> >
> > - intel_sseu_set_subslices(sseu, 0, sseu->subslice_mask, subslice_mask);
> > -
> > sseu->eu_total = compute_eu_total(sseu);
> >
> > /*
> > @@ -376,8 +398,7 @@ static void gen9_sseu_info_init(struct intel_gt *gt)
> > /* skip disabled slice */
> > continue;
> >
> > - intel_sseu_set_subslices(sseu, s, sseu->subslice_mask,
> > - subslice_mask);
> > + sseu->subslice_mask.hsw[s] = subslice_mask;
> >
> > eu_disable = intel_uncore_read(uncore, GEN9_EU_DISABLE(s));
> > for (ss = 0; ss < sseu->max_subslices; ss++) {
> > @@ -434,8 +455,8 @@ static void gen9_sseu_info_init(struct intel_gt *gt)
> > sseu->has_eu_pg = sseu->eu_per_subslice > 2;
> >
> > if (IS_GEN9_LP(i915)) {
> > -#define IS_SS_DISABLED(ss) (!(sseu->subslice_mask[0] & BIT(ss)))
> > - info->has_pooled_eu = hweight8(sseu->subslice_mask[0]) == 3;
> > +#define IS_SS_DISABLED(ss) (!(sseu->subslice_mask.hsw[0] & BIT(ss)))
> > + info->has_pooled_eu = hweight8(sseu->subslice_mask.hsw[0]) == 3;
> >
> > sseu->min_eu_in_pool = 0;
> > if (info->has_pooled_eu) {
> > @@ -489,8 +510,7 @@ static void bdw_sseu_info_init(struct intel_gt *gt)
> > /* skip disabled slice */
> > continue;
> >
> > - intel_sseu_set_subslices(sseu, s, sseu->subslice_mask,
> > - subslice_mask);
> > + sseu->subslice_mask.hsw[s] = subslice_mask;
> >
> > for (ss = 0; ss < sseu->max_subslices; ss++) {
> > u8 eu_disabled_mask;
> > @@ -587,8 +607,7 @@ static void hsw_sseu_info_init(struct intel_gt *gt)
> > sseu->eu_per_subslice);
> >
> > for (s = 0; s < sseu->max_slices; s++) {
> > - intel_sseu_set_subslices(sseu, s, sseu->subslice_mask,
> > - subslice_mask);
> > + sseu->subslice_mask.hsw[s] = subslice_mask;
> >
> > for (ss = 0; ss < sseu->max_subslices; ss++) {
> > sseu_set_eus(sseu, s, ss,
> > @@ -677,7 +696,7 @@ u32 intel_sseu_make_rpcs(struct intel_gt *gt,
> > */
> > if (GRAPHICS_VER(i915) == 11 &&
> > slices == 1 &&
> > - subslices > min_t(u8, 4, hweight8(sseu->subslice_mask[0]) / 2)) {
> > + subslices > min_t(u8, 4, hweight8(sseu->subslice_mask.hsw[0]) / 2)) {
> > GEM_BUG_ON(subslices & 1);
> >
> > subslice_pg = false;
> > @@ -743,14 +762,29 @@ void intel_sseu_dump(const struct sseu_dev_info *sseu, struct drm_printer *p)
> > {
> > int s;
> >
> > - drm_printf(p, "slice total: %u, mask=%04x\n",
> > - hweight8(sseu->slice_mask), sseu->slice_mask);
> > - drm_printf(p, "subslice total: %u\n", intel_sseu_subslice_total(sseu));
> > - for (s = 0; s < sseu->max_slices; s++) {
> > - drm_printf(p, "slice%d: %u subslices, mask=%08x\n",
> > - s, intel_sseu_subslices_per_slice(sseu, s),
> > - intel_sseu_get_subslices(sseu, s));
> > + if (sseu->has_xehp_dss) {
> > + drm_printf(p, "subslice total: %u\n",
> > + intel_sseu_subslice_total(sseu));
> > + drm_printf(p, "geometry dss mask=%*pb\n",
> > + XEHP_BITMAP_BITS(sseu->geometry_subslice_mask),
> > + sseu->geometry_subslice_mask.xehp);
> > + drm_printf(p, "compute dss mask=%*pb\n",
> > + XEHP_BITMAP_BITS(sseu->compute_subslice_mask),
> > + sseu->compute_subslice_mask.xehp);
> > + } else {
> > + drm_printf(p, "slice total: %u, mask=%04x\n",
> > + hweight8(sseu->slice_mask), sseu->slice_mask);
> > + drm_printf(p, "subslice total: %u\n",
> > + intel_sseu_subslice_total(sseu));
> > +
> > + for (s = 0; s < sseu->max_slices; s++) {
> > + u8 ss_mask = sseu->subslice_mask.hsw[s];
> > +
> > + drm_printf(p, "slice%d: %u subslices, mask=%08x\n",
> > + s, hweight8(ss_mask), ss_mask);
> > + }
> > }
> > +
> > drm_printf(p, "EU total: %u\n", sseu->eu_total);
> > drm_printf(p, "EU per subslice: %u\n", sseu->eu_per_subslice);
> > drm_printf(p, "has slice power gating: %s\n",
> > @@ -767,9 +801,10 @@ static void sseu_print_hsw_topology(const struct sseu_dev_info *sseu,
> > int s, ss;
> >
> > for (s = 0; s < sseu->max_slices; s++) {
> > + u8 ss_mask = sseu->subslice_mask.hsw[s];
> > +
> > drm_printf(p, "slice%d: %u subslice(s) (0x%08x):\n",
> > - s, intel_sseu_subslices_per_slice(sseu, s),
> > - intel_sseu_get_subslices(sseu, s));
> > + s, hweight8(ss_mask), ss_mask);
> >
> > for (ss = 0; ss < sseu->max_subslices; ss++) {
> > u16 enabled_eus = sseu_get_eus(sseu, s, ss);
> > @@ -783,16 +818,14 @@ static void sseu_print_hsw_topology(const struct sseu_dev_info *sseu,
> > static void sseu_print_xehp_topology(const struct sseu_dev_info *sseu,
> > struct drm_printer *p)
> > {
> > - u32 g_dss_mask = sseu_get_geometry_subslices(sseu);
> > - u32 c_dss_mask = intel_sseu_get_compute_subslices(sseu);
> > int dss;
> >
> > for (dss = 0; dss < sseu->max_subslices; dss++) {
> > u16 enabled_eus = sseu_get_eus(sseu, 0, dss);
> >
> > drm_printf(p, "DSS_%02d: G:%3s C:%3s, %2u EUs (0x%04hx)\n", dss,
> > - str_yes_no(g_dss_mask & BIT(dss)),
> > - str_yes_no(c_dss_mask & BIT(dss)),
> > + str_yes_no(test_bit(dss, sseu->geometry_subslice_mask.xehp)),
> > + str_yes_no(test_bit(dss, sseu->compute_subslice_mask.xehp)),
> > hweight16(enabled_eus), enabled_eus);
> > }
> > }
> > @@ -810,20 +843,44 @@ void intel_sseu_print_topology(struct drm_i915_private *i915,
> > }
> > }
> >
> > -u16 intel_slicemask_from_dssmask(u64 dss_mask, int dss_per_slice)
> > +void intel_sseu_print_ss_info(const char* type,
> > + const struct sseu_dev_info *sseu,
> > + struct seq_file *m)
> > +{
> > + int s;
> > +
> > + if (sseu->has_xehp_dss) {
> > + seq_printf(m, " %s Geometry DSS: %u\n", type,
> > + bitmap_weight(sseu->geometry_subslice_mask.xehp,
> > + XEHP_BITMAP_BITS(sseu->geometry_subslice_mask)));
> > + seq_printf(m, " %s Compute DSS: %u\n", type,
> > + bitmap_weight(sseu->compute_subslice_mask.xehp,
> > + XEHP_BITMAP_BITS(sseu->compute_subslice_mask)));
> > + } else {
> > + for (s = 0; s < fls(sseu->slice_mask); s++)
> > + seq_printf(m, " %s Slice%i subslices: %u\n", type,
> > + s, hweight8(sseu->subslice_mask.hsw[s]));
> > + }
> > +}
> > +
> > +u16 intel_slicemask_from_xehp_dssmask(intel_sseu_ss_mask_t dss_mask,
> > + int dss_per_slice)
> > {
> > + intel_sseu_ss_mask_t per_slice_mask = {};
> > u16 slice_mask = 0;
> > int i;
> >
> > - WARN_ON(sizeof(dss_mask) * 8 / dss_per_slice > 8 * sizeof(slice_mask));
> > + WARN_ON(DIV_ROUND_UP(XEHP_BITMAP_BITS(dss_mask), dss_per_slice) >
> > + 8 * sizeof(slice_mask));
> >
> > - for (i = 0; dss_mask; i++) {
> > - if (dss_mask & GENMASK(dss_per_slice - 1, 0))
> > + bitmap_fill(per_slice_mask.xehp, dss_per_slice);
> > + for (i = 0; !bitmap_empty(dss_mask.xehp, XEHP_BITMAP_BITS(dss_mask)); i++) {
> > + if (bitmap_intersects(dss_mask.xehp, per_slice_mask.xehp, dss_per_slice))
> > slice_mask |= BIT(i);
> >
> > - dss_mask >>= dss_per_slice;
> > + bitmap_shift_right(dss_mask.xehp, dss_mask.xehp, dss_per_slice,
> > + XEHP_BITMAP_BITS(dss_mask));
> > }
> >
> > return slice_mask;
> > }
> > -
> > diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.h b/drivers/gpu/drm/i915/gt/intel_sseu.h
> > index ffa375e68959..e7f336a7ffbb 100644
> > --- a/drivers/gpu/drm/i915/gt/intel_sseu.h
> > +++ b/drivers/gpu/drm/i915/gt/intel_sseu.h
> > @@ -25,12 +25,16 @@ struct drm_printer;
> > /*
> > * Maximum number of subslices that can exist within a HSW-style slice. This
> > * is only relevant to pre-Xe_HP platforms (Xe_HP and beyond use the
> > - * GEN_MAX_DSS value below).
> > + * I915_MAX_SS_FUSE_BITS value below).
> > */
> > #define GEN_MAX_SS_PER_HSW_SLICE 6
> >
> > -/* Maximum number of DSS on newer platforms (Xe_HP and beyond). */
> > -#define GEN_MAX_DSS 32
> > +/*
> > + * Maximum number of 32-bit registers used by hardware to express the
> > + * enabled/disabled subslices.
> > + */
> > +#define I915_MAX_SS_FUSE_REGS 1
> > +#define I915_MAX_SS_FUSE_BITS (I915_MAX_SS_FUSE_REGS * 32)
> >
> > /* Maximum number of EUs that can exist within a subslice or DSS. */
> > #define GEN_MAX_EUS_PER_SS 16
> > @@ -38,7 +42,7 @@ struct drm_printer;
> > #define SSEU_MAX(a, b) ((a) > (b) ? (a) : (b))
> >
> > /* The maximum number of bits needed to express each subslice/DSS independently */
> > -#define GEN_SS_MASK_SIZE SSEU_MAX(GEN_MAX_DSS, \
> > +#define GEN_SS_MASK_SIZE SSEU_MAX(I915_MAX_SS_FUSE_BITS, \
> > GEN_MAX_HSW_SLICES * GEN_MAX_SS_PER_HSW_SLICE)
> >
> > #define GEN_SSEU_STRIDE(max_entries) DIV_ROUND_UP(max_entries, BITS_PER_BYTE)
> > @@ -49,17 +53,24 @@ struct drm_printer;
> > #define GEN_DSS_PER_CSLICE 8
> > #define GEN_DSS_PER_MSLICE 8
> >
> > -#define GEN_MAX_GSLICES (GEN_MAX_DSS / GEN_DSS_PER_GSLICE)
> > -#define GEN_MAX_CSLICES (GEN_MAX_DSS / GEN_DSS_PER_CSLICE)
> > +#define GEN_MAX_GSLICES (I915_MAX_SS_FUSE_BITS / GEN_DSS_PER_GSLICE)
> > +#define GEN_MAX_CSLICES (I915_MAX_SS_FUSE_BITS / GEN_DSS_PER_CSLICE)
> > +
> > +typedef union {
> > + u8 hsw[GEN_MAX_HSW_SLICES];
> > +
> > + /* Bitmap compatible with linux/bitmap.h; may exceed size of u64 */
> > + unsigned long xehp[BITS_TO_LONGS(I915_MAX_SS_FUSE_BITS)];
> > +} intel_sseu_ss_mask_t;
> >
> > struct sseu_dev_info {
> > u8 slice_mask;
> > - u8 subslice_mask[GEN_SS_MASK_SIZE];
> > - u8 geometry_subslice_mask[GEN_SS_MASK_SIZE];
> > - u8 compute_subslice_mask[GEN_SS_MASK_SIZE];
> > + intel_sseu_ss_mask_t subslice_mask;
> > + intel_sseu_ss_mask_t geometry_subslice_mask;
> > + intel_sseu_ss_mask_t compute_subslice_mask;
> > union {
> > u16 hsw[GEN_MAX_HSW_SLICES][GEN_MAX_SS_PER_HSW_SLICE];
> > - u16 xehp[GEN_MAX_DSS];
> > + u16 xehp[I915_MAX_SS_FUSE_BITS];
> > } eu_mask;
> >
> > u16 eu_total;
> > @@ -80,8 +91,6 @@ struct sseu_dev_info {
> > u8 max_slices;
> > u8 max_subslices;
> > u8 max_eus_per_subslice;
> > -
> > - u8 ss_stride;
> > };
> >
> > /*
> > @@ -99,7 +108,7 @@ intel_sseu_from_device_info(const struct sseu_dev_info *sseu)
> > {
> > struct intel_sseu value = {
> > .slice_mask = sseu->slice_mask,
> > - .subslice_mask = sseu->subslice_mask[0],
> > + .subslice_mask = sseu->subslice_mask.hsw[0],
> > .min_eus_per_subslice = sseu->max_eus_per_subslice,
> > .max_eus_per_subslice = sseu->max_eus_per_subslice,
> > };
> > @@ -111,18 +120,27 @@ static inline bool
> > intel_sseu_has_subslice(const struct sseu_dev_info *sseu, int slice,
> > int subslice)
> > {
> > - u8 mask;
> > - int ss_idx = subslice / BITS_PER_BYTE;
> > -
> > if (slice >= sseu->max_slices ||
> > subslice >= sseu->max_subslices)
> > return false;
> >
> > - GEM_BUG_ON(ss_idx >= sseu->ss_stride);
> > -
> > - mask = sseu->subslice_mask[slice * sseu->ss_stride + ss_idx];
> > + if (sseu->has_xehp_dss)
> > + return test_bit(subslice, sseu->subslice_mask.xehp);
> > + else
> > + return sseu->subslice_mask.hsw[slice] & BIT(subslice);
> > +}
> >
> > - return mask & BIT(subslice % BITS_PER_BYTE);
> > +/*
> > + * Used to obtain the index of the first DSS. Can start searching from the
> > + * beginning of a specific dss group (e.g., gslice, cslice, etc.) if
> > + * groupsize and groupnum are non-zero.
> > + */
> > +static inline unsigned int
> > +intel_sseu_find_first_xehp_dss(const struct sseu_dev_info *sseu, int groupsize,
> > + int groupnum)
> > +{
> > + return find_next_bit(sseu->subslice_mask.xehp, I915_MAX_SS_FUSE_BITS,
> > + groupnum * groupsize);
> Any specific reason for not replacing I915_MAX_SS_FUSE_BITS with
> XEHP_BITMAP_BITS here?
It looks like I just missed this one while changing the others. I'll
send an update that makes that change.
Matt
>
> Regards,
> Bala
> > }
> >
> > void intel_sseu_set_info(struct sseu_dev_info *sseu, u8 max_slices,
> > @@ -132,14 +150,10 @@ unsigned int
> > intel_sseu_subslice_total(const struct sseu_dev_info *sseu);
> >
> > unsigned int
> > -intel_sseu_subslices_per_slice(const struct sseu_dev_info *sseu, u8 slice);
> > -
> > -u32 intel_sseu_get_subslices(const struct sseu_dev_info *sseu, u8 slice);
> > +intel_sseu_get_hsw_subslices(const struct sseu_dev_info *sseu, u8 slice);
> >
> > -u32 intel_sseu_get_compute_subslices(const struct sseu_dev_info *sseu);
> > -
> > -void intel_sseu_set_subslices(struct sseu_dev_info *sseu, int slice,
> > - u8 *subslice_mask, u32 ss_mask);
> > +intel_sseu_ss_mask_t
> > +intel_sseu_get_compute_subslices(const struct sseu_dev_info *sseu);
> >
> > void intel_sseu_info_init(struct intel_gt *gt);
> >
> > @@ -151,9 +165,15 @@ void intel_sseu_print_topology(struct drm_i915_private *i915,
> > const struct sseu_dev_info *sseu,
> > struct drm_printer *p);
> >
> > -u16 intel_slicemask_from_dssmask(u64 dss_mask, int dss_per_slice);
> > +u16 intel_slicemask_from_xehp_dssmask(intel_sseu_ss_mask_t dss_mask, int dss_per_slice);
> >
> > int intel_sseu_copy_eumask_to_user(void __user *to,
> > const struct sseu_dev_info *sseu);
> > +int intel_sseu_copy_ssmask_to_user(void __user *to,
> > + const struct sseu_dev_info *sseu);
> > +
> > +void intel_sseu_print_ss_info(const char* type,
> > + const struct sseu_dev_info *sseu,
> > + struct seq_file *m);
> >
> > #endif /* __INTEL_SSEU_H__ */
> > diff --git a/drivers/gpu/drm/i915/gt/intel_sseu_debugfs.c b/drivers/gpu/drm/i915/gt/intel_sseu_debugfs.c
> > index 2d5d011e01db..c2ee5e1826b5 100644
> > --- a/drivers/gpu/drm/i915/gt/intel_sseu_debugfs.c
> > +++ b/drivers/gpu/drm/i915/gt/intel_sseu_debugfs.c
> > @@ -4,6 +4,7 @@
> > * Copyright © 2020 Intel Corporation
> > */
> >
> > +#include <linux/bitmap.h>
> > #include <linux/string_helpers.h>
> >
> > #include "i915_drv.h"
> > @@ -11,14 +12,6 @@
> > #include "intel_gt_regs.h"
> > #include "intel_sseu_debugfs.h"
> >
> > -static void sseu_copy_subslices(const struct sseu_dev_info *sseu,
> > - int slice, u8 *to_mask)
> > -{
> > - int offset = slice * sseu->ss_stride;
> > -
> > - memcpy(&to_mask[offset], &sseu->subslice_mask[offset], sseu->ss_stride);
> > -}
> > -
> > static void cherryview_sseu_device_status(struct intel_gt *gt,
> > struct sseu_dev_info *sseu)
> > {
> > @@ -41,7 +34,7 @@ static void cherryview_sseu_device_status(struct intel_gt *gt,
> > continue;
> >
> > sseu->slice_mask = BIT(0);
> > - sseu->subslice_mask[0] |= BIT(ss);
> > + sseu->subslice_mask.hsw[0] |= BIT(ss);
> > eu_cnt = ((sig1[ss] & CHV_EU08_PG_ENABLE) ? 0 : 2) +
> > ((sig1[ss] & CHV_EU19_PG_ENABLE) ? 0 : 2) +
> > ((sig1[ss] & CHV_EU210_PG_ENABLE) ? 0 : 2) +
> > @@ -92,7 +85,7 @@ static void gen11_sseu_device_status(struct intel_gt *gt,
> > continue;
> >
> > sseu->slice_mask |= BIT(s);
> > - sseu_copy_subslices(&info->sseu, s, sseu->subslice_mask);
> > + sseu->subslice_mask.hsw[s] = info->sseu.subslice_mask.hsw[s];
> >
> > for (ss = 0; ss < info->sseu.max_subslices; ss++) {
> > unsigned int eu_cnt;
> > @@ -147,21 +140,17 @@ static void gen9_sseu_device_status(struct intel_gt *gt,
> > sseu->slice_mask |= BIT(s);
> >
> > if (IS_GEN9_BC(gt->i915))
> > - sseu_copy_subslices(&info->sseu, s,
> > - sseu->subslice_mask);
> > + sseu->subslice_mask.hsw[s] = info->sseu.subslice_mask.hsw[s];
> >
> > for (ss = 0; ss < info->sseu.max_subslices; ss++) {
> > unsigned int eu_cnt;
> > - u8 ss_idx = s * info->sseu.ss_stride +
> > - ss / BITS_PER_BYTE;
> >
> > if (IS_GEN9_LP(gt->i915)) {
> > if (!(s_reg[s] & (GEN9_PGCTL_SS_ACK(ss))))
> > /* skip disabled subslice */
> > continue;
> >
> > - sseu->subslice_mask[ss_idx] |=
> > - BIT(ss % BITS_PER_BYTE);
> > + sseu->subslice_mask.hsw[s] |= BIT(ss);
> > }
> >
> > eu_cnt = eu_reg[2 * s + ss / 2] & eu_mask[ss % 2];
> > @@ -188,8 +177,7 @@ static void bdw_sseu_device_status(struct intel_gt *gt,
> > if (sseu->slice_mask) {
> > sseu->eu_per_subslice = info->sseu.eu_per_subslice;
> > for (s = 0; s < fls(sseu->slice_mask); s++)
> > - sseu_copy_subslices(&info->sseu, s,
> > - sseu->subslice_mask);
> > + sseu->subslice_mask.hsw[s] = info->sseu.subslice_mask.hsw[s];
> > sseu->eu_total = sseu->eu_per_subslice *
> > intel_sseu_subslice_total(sseu);
> >
> > @@ -208,7 +196,6 @@ static void i915_print_sseu_info(struct seq_file *m,
> > const struct sseu_dev_info *sseu)
> > {
> > const char *type = is_available_info ? "Available" : "Enabled";
> > - int s;
> >
> > seq_printf(m, " %s Slice Mask: %04x\n", type,
> > sseu->slice_mask);
> > @@ -216,10 +203,7 @@ static void i915_print_sseu_info(struct seq_file *m,
> > hweight8(sseu->slice_mask));
> > seq_printf(m, " %s Subslice Total: %u\n", type,
> > intel_sseu_subslice_total(sseu));
> > - for (s = 0; s < fls(sseu->slice_mask); s++) {
> > - seq_printf(m, " %s Slice%i subslices: %u\n", type,
> > - s, intel_sseu_subslices_per_slice(sseu, s));
> > - }
> > + intel_sseu_print_ss_info(type, sseu, m);
> > seq_printf(m, " %s EU Total: %u\n", type,
> > sseu->eu_total);
> > seq_printf(m, " %s EU Per Subslice: %u\n", type,
> > diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> > index 73b59ea6fd3b..1bf62273e02d 100644
> > --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> > +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> > @@ -948,8 +948,8 @@ gen9_wa_init_mcr(struct drm_i915_private *i915, struct i915_wa_list *wal)
> > * on s/ss combo, the read should be done with read_subslice_reg.
> > */
> > slice = ffs(sseu->slice_mask) - 1;
> > - GEM_BUG_ON(slice >= ARRAY_SIZE(sseu->subslice_mask));
> > - subslice = ffs(intel_sseu_get_subslices(sseu, slice));
> > + GEM_BUG_ON(slice >= ARRAY_SIZE(sseu->subslice_mask.hsw));
> > + subslice = ffs(intel_sseu_get_hsw_subslices(sseu, slice));
> > GEM_BUG_ON(!subslice);
> > subslice--;
> >
> > @@ -1087,11 +1087,10 @@ static void
> > icl_wa_init_mcr(struct intel_gt *gt, struct i915_wa_list *wal)
> > {
> > const struct sseu_dev_info *sseu = >->info.sseu;
> > - unsigned int slice, subslice;
> > + unsigned int subslice;
> >
> > GEM_BUG_ON(GRAPHICS_VER(gt->i915) < 11);
> > GEM_BUG_ON(hweight8(sseu->slice_mask) > 1);
> > - slice = 0;
> >
> > /*
> > * Although a platform may have subslices, we need to always steer
> > @@ -1102,7 +1101,7 @@ icl_wa_init_mcr(struct intel_gt *gt, struct i915_wa_list *wal)
> > * one of the higher subslices, we run the risk of reading back 0's or
> > * random garbage.
> > */
> > - subslice = __ffs(intel_sseu_get_subslices(sseu, slice));
> > + subslice = __ffs(intel_sseu_get_hsw_subslices(sseu, 0));
> >
> > /*
> > * If the subslice we picked above also steers us to a valid L3 bank,
> > @@ -1112,7 +1111,7 @@ icl_wa_init_mcr(struct intel_gt *gt, struct i915_wa_list *wal)
> > if (gt->info.l3bank_mask & BIT(subslice))
> > gt->steering_table[L3BANK] = NULL;
> >
> > - __add_mcr_wa(gt, wal, slice, subslice);
> > + __add_mcr_wa(gt, wal, 0, subslice);
> > }
> >
> > static void
> > @@ -1120,7 +1119,6 @@ xehp_init_mcr(struct intel_gt *gt, struct i915_wa_list *wal)
> > {
> > const struct sseu_dev_info *sseu = >->info.sseu;
> > unsigned long slice, subslice = 0, slice_mask = 0;
> > - u64 dss_mask = 0;
> > u32 lncf_mask = 0;
> > int i;
> >
> > @@ -1151,8 +1149,8 @@ xehp_init_mcr(struct intel_gt *gt, struct i915_wa_list *wal)
> > */
> >
> > /* Find the potential gslice candidates */
> > - dss_mask = intel_sseu_get_subslices(sseu, 0);
> > - slice_mask = intel_slicemask_from_dssmask(dss_mask, GEN_DSS_PER_GSLICE);
> > + slice_mask = intel_slicemask_from_xehp_dssmask(sseu->subslice_mask,
> > + GEN_DSS_PER_GSLICE);
> >
> > /*
> > * Find the potential LNCF candidates. Either LNCF within a valid
> > @@ -1177,9 +1175,8 @@ xehp_init_mcr(struct intel_gt *gt, struct i915_wa_list *wal)
> > }
> >
> > slice = __ffs(slice_mask);
> > - subslice = __ffs(dss_mask >> (slice * GEN_DSS_PER_GSLICE));
> > + subslice = intel_sseu_find_first_xehp_dss(sseu, GEN_DSS_PER_GSLICE, slice);
> > WARN_ON(subslice > GEN_DSS_PER_GSLICE);
> > - WARN_ON(dss_mask >> (slice * GEN_DSS_PER_GSLICE) == 0);
> >
> > __add_mcr_wa(gt, wal, slice, subslice);
> >
> > @@ -2030,9 +2027,8 @@ engine_fake_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
> >
> > static bool needs_wa_1308578152(struct intel_engine_cs *engine)
> > {
> > - u64 dss_mask = intel_sseu_get_subslices(&engine->gt->info.sseu, 0);
> > -
> > - return (dss_mask & GENMASK(GEN_DSS_PER_GSLICE - 1, 0)) == 0;
> > + return intel_sseu_find_first_xehp_dss(&engine->gt->info.sseu, 0, 0) >
> > + GEN_DSS_PER_GSLICE;
> > }
> >
> > static void
> > diff --git a/drivers/gpu/drm/i915/i915_getparam.c b/drivers/gpu/drm/i915/i915_getparam.c
> > index ac9767c56619..6fd15b39570c 100644
> > --- a/drivers/gpu/drm/i915/i915_getparam.c
> > +++ b/drivers/gpu/drm/i915/i915_getparam.c
> > @@ -162,8 +162,7 @@ int i915_getparam_ioctl(struct drm_device *dev, void *data,
> > return -EINVAL;
> >
> > /* Only copy bits from the first slice */
> > - memcpy(&value, sseu->subslice_mask,
> > - min(sseu->ss_stride, (u8)sizeof(value)));
> > + value = intel_sseu_get_hsw_subslices(sseu, 0);
> > if (!value)
> > return -ENODEV;
> > break;
> > diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
> > index 89c475d525b8..0094f67c63f2 100644
> > --- a/drivers/gpu/drm/i915/i915_query.c
> > +++ b/drivers/gpu/drm/i915/i915_query.c
> > @@ -31,10 +31,11 @@ static int copy_query_item(void *query_hdr, size_t query_sz,
> >
> > static int fill_topology_info(const struct sseu_dev_info *sseu,
> > struct drm_i915_query_item *query_item,
> > - const u8 *subslice_mask)
> > + intel_sseu_ss_mask_t subslice_mask)
> > {
> > struct drm_i915_query_topology_info topo;
> > u32 slice_length, subslice_length, eu_length, total_length;
> > + int ss_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
> > int eu_stride = GEN_SSEU_STRIDE(sseu->max_eus_per_subslice);
> > int ret;
> >
> > @@ -44,7 +45,7 @@ static int fill_topology_info(const struct sseu_dev_info *sseu,
> > return -ENODEV;
> >
> > slice_length = sizeof(sseu->slice_mask);
> > - subslice_length = sseu->max_slices * sseu->ss_stride;
> > + subslice_length = sseu->max_slices * ss_stride;
> > eu_length = sseu->max_slices * sseu->max_subslices * eu_stride;
> > total_length = sizeof(topo) + slice_length + subslice_length +
> > eu_length;
> > @@ -60,7 +61,7 @@ static int fill_topology_info(const struct sseu_dev_info *sseu,
> > topo.max_eus_per_subslice = sseu->max_eus_per_subslice;
> >
> > topo.subslice_offset = slice_length;
> > - topo.subslice_stride = sseu->ss_stride;
> > + topo.subslice_stride = ss_stride;
> > topo.eu_offset = slice_length + subslice_length;
> > topo.eu_stride = eu_stride;
> >
> > @@ -72,9 +73,9 @@ static int fill_topology_info(const struct sseu_dev_info *sseu,
> > &sseu->slice_mask, slice_length))
> > return -EFAULT;
> >
> > - if (copy_to_user(u64_to_user_ptr(query_item->data_ptr +
> > - sizeof(topo) + slice_length),
> > - subslice_mask, subslice_length))
> > + if (intel_sseu_copy_ssmask_to_user(u64_to_user_ptr(query_item->data_ptr +
> > + sizeof(topo) + slice_length),
> > + sseu))
> > return -EFAULT;
> >
> > if (intel_sseu_copy_eumask_to_user(u64_to_user_ptr(query_item->data_ptr +
> > --
> > 2.35.3
> >
--
Matt Roper
Graphics Software Engineer
VTT-OSGC Platform Enablement
Intel Corporation
