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drm/i915/icl: WaL3BankAddressHashing 

Revert to an L3 non-hash model, for performance reasons.

v2:
  - Place the WA name above the actual change
  - Improve the register naming
v3:
  - Rebased
  - Renamed to Wa_1604223664
v4: Rebased on top of the WA refactoring
v5:
  - Added References (Mika)
  - Fixed wrong mask and value (Mika)
  - Do not apply together with another WA for the same
    register (not worth the hassle)
v6:
  - Rebased
  - C, not lisp (Chris)

References: HSDES#1604223664
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1525814984-20039-5-git-send-email-oscar.mateo@intel.com
This commit is contained in:
Oscar Mateo 2018-05-08 14:29:26 -07:00 committed by Mika Kuoppala
parent 5bcebe7670
commit d41bab6879
2 changed files with 16 additions and 0 deletions
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6
drivers/gpu/drm/i915/i915_reg.h
View File

@ -8253,6 +8253,12 @@ enum {
#define GEN8_GARBCNTL _MMIO(0xB004)
#define GEN9_GAPS_TSV_CREDIT_DISABLE (1 << 7)
#define GEN11_ARBITRATION_PRIO_ORDER_MASK (0x3f << 22)
#define GEN11_HASH_CTRL_EXCL_MASK (0x7f << 0)
#define GEN11_HASH_CTRL_EXCL_BIT0 (1 << 0)
#define GEN11_GLBLINVL _MMIO(0xB404)
#define GEN11_BANK_HASH_ADDR_EXCL_MASK (0x7f << 5)
#define GEN11_BANK_HASH_ADDR_EXCL_BIT0 (1 << 5)
#define GEN10_DFR_RATIO_EN_AND_CHICKEN _MMIO(0x9550)
#define DFR_DISABLE (1 << 9)

10
drivers/gpu/drm/i915/intel_workarounds.c
View File

@ -705,6 +705,16 @@ static void icl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
*/
I915_WRITE(GEN8_GARBCNTL, I915_READ(GEN8_GARBCNTL) |
GEN11_ARBITRATION_PRIO_ORDER_MASK);
/* Wa_1604223664:icl
* Formerly known as WaL3BankAddressHashing
*/
I915_WRITE(GEN8_GARBCNTL,
(I915_READ(GEN8_GARBCNTL) & ~GEN11_HASH_CTRL_EXCL_MASK) |
GEN11_HASH_CTRL_EXCL_BIT0);
I915_WRITE(GEN11_GLBLINVL,
(I915_READ(GEN11_GLBLINVL) & ~GEN11_BANK_HASH_ADDR_EXCL_MASK) |
GEN11_BANK_HASH_ADDR_EXCL_BIT0);
}
void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)