[Intel-gfx] [PATCH 11/53] drm/i915/xehp: Define multicast register ranges

Matt Roper
2021-07-01T20:26:01Z

Since we can't steer multicast register reads during ring-based
workaround verification, we need to define the multicast ranges where
failure to steer could potentially cause us to read back from a
fused-off register instance.

As with gen12, we can ignore the multicast ranges that the bspec
describes as 'SQIDI' since all instances of those registers will always
be present and we'll always be able to read back a workaround value that
was written with multicast.

Bspec: 66534
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index d9a5a445ceec..20c6ca28e407 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -2089,12 +2089,30 @@ static const struct mcr_range mcr_ranges_gen12[] = {
{},
};

+static const struct mcr_range mcr_ranges_xehp[] = {
+ { .start = 0x4000, .end = 0x4aff },
+ { .start = 0x5200, .end = 0x52ff },
+ { .start = 0x5400, .end = 0x7fff },
+ { .start = 0x8140, .end = 0x815f },
+ { .start = 0x8c80, .end = 0x8dff },
+ { .start = 0x94d0, .end = 0x955f },
+ { .start = 0x9680, .end = 0x96ff },
+ { .start = 0xb000, .end = 0xb3ff },
+ { .start = 0xc800, .end = 0xcfff },
+ { .start = 0xd800, .end = 0xd8ff },
+ { .start = 0xdc00, .end = 0xffff },
+ { .start = 0x17000, .end = 0x17fff },
+ { .start = 0x24a00, .end = 0x24a7f },
+};
+
static bool mcr_range(struct drm_i915_private *i915, u32 offset)
{
const struct mcr_range *mcr_ranges;
int i;

- if (GRAPHICS_VER(i915) >= 12)
+ if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
+ mcr_ranges = mcr_ranges_xehp;
+ else if (GRAPHICS_VER(i915) >= 12)
mcr_ranges = mcr_ranges_gen12;
else if (GRAPHICS_VER(i915) >= 8)
mcr_ranges = mcr_ranges_gen8;