Gen11 adds new set of scratch registers that can be used for MMIO
based Host-to-Guc communication. Due to limited number of these
registers it is expected that host will use them only for command
transport buffers (CTB) communication setup if one is available.
Bspec: 21044
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_guc.c | 12 +++++++++---
drivers/gpu/drm/i915/intel_guc_reg.h | 3 +++
2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 888a1e999c8b..538868a10168 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -56,9 +56,15 @@ void intel_guc_init_send_regs(struct intel_guc *guc)
enum forcewake_domains fw_domains = 0;
unsigned int i;
- guc->send_regs.base = i915_mmio_reg_offset(SOFT_SCRATCH(0));
- guc->send_regs.count = GUC_MAX_MMIO_MSG_LEN;
- BUILD_BUG_ON(GUC_MAX_MMIO_MSG_LEN > SOFT_SCRATCH_COUNT);
+ if (HAS_GUC_CT(dev_priv) && INTEL_GEN(dev_priv) >= 11) {
+ guc->send_regs.base =
+ i915_mmio_reg_offset(GEN11_SOFT_SCRATCH(0));
+ guc->send_regs.count = GEN11_SOFT_SCRATCH_COUNT;
+ } else {
+ guc->send_regs.base = i915_mmio_reg_offset(SOFT_SCRATCH(0));
+ guc->send_regs.count = GUC_MAX_MMIO_MSG_LEN;
+ BUILD_BUG_ON(GUC_MAX_MMIO_MSG_LEN > SOFT_SCRATCH_COUNT);
+ }
for (i = 0; i < guc->send_regs.count; i++) {
fw_domains |= intel_uncore_forcewake_for_reg(&dev_priv->uncore,
diff --git a/drivers/gpu/drm/i915/intel_guc_reg.h b/drivers/gpu/drm/i915/intel_guc_reg.h
index aec02eddbaed..d26de5193568 100644
--- a/drivers/gpu/drm/i915/intel_guc_reg.h
+++ b/drivers/gpu/drm/i915/intel_guc_reg.h
@@ -51,6 +51,9 @@
#define SOFT_SCRATCH(n) _MMIO(0xc180 + (n) * 4)
#define SOFT_SCRATCH_COUNT 16
+#define GEN11_SOFT_SCRATCH(n) _MMIO(0x190240 + (n) * 4)
+#define GEN11_SOFT_SCRATCH_COUNT 4
+
#define UOS_RSA_SCRATCH(i) _MMIO(0xc200 + (i) * 4)
#define UOS_RSA_SCRATCH_COUNT 64
--
2.19.2
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