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drm/i915: take a reference to uncore in the engine and use it

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A few advantages:

- Prepares us for the planned split of display uncore from GT uncore

- Improves our engine-centric view of the world in the engine code
  and allows us to avoid jumping back to dev_priv.

- Allows us to wrap accesses to engine register in nice macros that
  automatically pick the right mmio base.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190325214940.23632-10-daniele.ceraolospurio@intel.com
This commit is contained in:
Daniele Ceraolo Spurio
2019-03-25 14:49:40 -07:00
committed by Chris Wilson
parent 97a04e0d07
commit baba6e572b
13 changed files with 242 additions and 217 deletions
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13
drivers/gpu/drm/i915/i915_reset.c
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@@ -1173,19 +1173,24 @@ static void i915_reset_device(struct drm_i915_private *i915,
kobject_uevent_env(kobj, KOBJ_CHANGE, reset_done_event);
}
static void clear_register(struct drm_i915_private *dev_priv, i915_reg_t reg)
{
I915_WRITE(reg, I915_READ(reg));
}
void i915_clear_error_registers(struct drm_i915_private *dev_priv)
{
u32 eir;
if (!IS_GEN(dev_priv, 2))
I915_WRITE(PGTBL_ER, I915_READ(PGTBL_ER));
clear_register(dev_priv, PGTBL_ER);
if (INTEL_GEN(dev_priv) < 4)
I915_WRITE(IPEIR, I915_READ(IPEIR));
clear_register(dev_priv, IPEIR(RENDER_RING_BASE));
else
I915_WRITE(IPEIR_I965, I915_READ(IPEIR_I965));
clear_register(dev_priv, IPEIR_I965);
I915_WRITE(EIR, I915_READ(EIR));
clear_register(dev_priv, EIR);
eir = I915_READ(EIR);
if (eir) {
/*