From 159367bb9e7439b8c1c4c066596a1663b901647b Mon Sep 17 00:00:00 2001 From: Daniele Ceraolo Spurio Date: Wed, 20 Mar 2019 12:27:32 +0000 Subject: [PATCH] drm/i915: always use masks on FW regs Upper bits are reserved on gen6, so no issue if we write them. Note that we're already doing this in the non-MT case of IVB, which uses the same register. Signed-off-by: Daniele Ceraolo Spurio Cc: Paulo Zanoni Cc: Chris Wilson Reviewed-by: Paulo Zanoni Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20190320122732.14512-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/intel_uncore.c | 44 +++++++++++------------------ drivers/gpu/drm/i915/intel_uncore.h | 4 --- 2 files changed, 16 insertions(+), 32 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 7129eebc333b..b4cea3cf3915 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -59,18 +59,19 @@ intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id) } #define fw_ack(d) readl((d)->reg_ack) -#define fw_set(d, val) writel((val), (d)->reg_set) +#define fw_set(d, val) writel(_MASKED_BIT_ENABLE((val)), (d)->reg_set) +#define fw_clear(d, val) writel(_MASKED_BIT_DISABLE((val)), (d)->reg_set) static inline void -fw_domain_reset(const struct intel_uncore *uncore, - const struct intel_uncore_forcewake_domain *d) +fw_domain_reset(const struct intel_uncore_forcewake_domain *d) { /* * We don't really know if the powerwell for the forcewake domain we are * trying to reset here does exist at this point (engines could be fused * off in ICL+), so no waiting for acks */ - fw_set(d, uncore->fw_reset); + /* WaRsClearFWBitsAtReset:bdw,skl */ + fw_clear(d, 0xffff); } static inline void @@ -146,14 +147,14 @@ fw_domain_wait_ack_with_fallback(const struct intel_uncore_forcewake_domain *d, do { wait_ack_clear(d, FORCEWAKE_KERNEL_FALLBACK); - fw_set(d, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL_FALLBACK)); + fw_set(d, FORCEWAKE_KERNEL_FALLBACK); /* Give gt some time to relax before the polling frenzy */ udelay(10 * pass); wait_ack_set(d, FORCEWAKE_KERNEL_FALLBACK); ack_detected = (fw_ack(d) & ack_bit) == value; - fw_set(d, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL_FALLBACK)); + fw_clear(d, FORCEWAKE_KERNEL_FALLBACK); } while (!ack_detected && pass++ < 10); DRM_DEBUG_DRIVER("%s had to use fallback to %s ack, 0x%x (passes %u)\n", @@ -176,10 +177,9 @@ fw_domain_wait_ack_clear_fallback(const struct intel_uncore_forcewake_domain *d) } static inline void -fw_domain_get(const struct intel_uncore *uncore, - const struct intel_uncore_forcewake_domain *d) +fw_domain_get(const struct intel_uncore_forcewake_domain *d) { - fw_set(d, uncore->fw_set); + fw_set(d, FORCEWAKE_KERNEL); } static inline void @@ -201,10 +201,9 @@ fw_domain_wait_ack_set_fallback(const struct intel_uncore_forcewake_domain *d) } static inline void -fw_domain_put(const struct intel_uncore *uncore, - const struct intel_uncore_forcewake_domain *d) +fw_domain_put(const struct intel_uncore_forcewake_domain *d) { - fw_set(d, uncore->fw_clear); + fw_clear(d, FORCEWAKE_KERNEL); } static void @@ -218,7 +217,7 @@ fw_domains_get(struct drm_i915_private *i915, enum forcewake_domains fw_domains) for_each_fw_domain_masked(d, fw_domains, i915, tmp) { fw_domain_wait_ack_clear(d); - fw_domain_get(uncore, d); + fw_domain_get(d); } for_each_fw_domain_masked(d, fw_domains, i915, tmp) @@ -239,7 +238,7 @@ fw_domains_get_with_fallback(struct drm_i915_private *i915, for_each_fw_domain_masked(d, fw_domains, i915, tmp) { fw_domain_wait_ack_clear_fallback(d); - fw_domain_get(uncore, d); + fw_domain_get(d); } for_each_fw_domain_masked(d, fw_domains, i915, tmp) @@ -258,7 +257,7 @@ fw_domains_put(struct drm_i915_private *i915, enum forcewake_domains fw_domains) GEM_BUG_ON(fw_domains & ~uncore->fw_domains); for_each_fw_domain_masked(d, fw_domains, i915, tmp) - fw_domain_put(uncore, d); + fw_domain_put(d); uncore->fw_domains_active &= ~fw_domains; } @@ -277,7 +276,7 @@ fw_domains_reset(struct drm_i915_private *i915, GEM_BUG_ON(fw_domains & ~uncore->fw_domains); for_each_fw_domain_masked(d, fw_domains, i915, tmp) - fw_domain_reset(uncore, d); + fw_domain_reset(d); } static inline u32 gt_thread_status(struct drm_i915_private *dev_priv) @@ -1371,7 +1370,7 @@ static void fw_domain_init(struct drm_i915_private *dev_priv, uncore->fw_domains |= BIT(domain_id); - fw_domain_reset(uncore, d); + fw_domain_reset(d); } static void fw_domain_fini(struct drm_i915_private *dev_priv, @@ -1396,17 +1395,6 @@ static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv) if (INTEL_GEN(dev_priv) <= 5 || intel_vgpu_active(dev_priv)) return; - if (IS_GEN(dev_priv, 6)) { - dev_priv->uncore.fw_reset = 0; - dev_priv->uncore.fw_set = FORCEWAKE_KERNEL; - dev_priv->uncore.fw_clear = 0; - } else { - /* WaRsClearFWBitsAtReset:bdw,skl */ - dev_priv->uncore.fw_reset = _MASKED_BIT_DISABLE(0xffff); - dev_priv->uncore.fw_set = _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL); - dev_priv->uncore.fw_clear = _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL); - } - if (INTEL_GEN(dev_priv) >= 11) { int i; diff --git a/drivers/gpu/drm/i915/intel_uncore.h b/drivers/gpu/drm/i915/intel_uncore.h index b0a95469babf..579a7f6b8445 100644 --- a/drivers/gpu/drm/i915/intel_uncore.h +++ b/drivers/gpu/drm/i915/intel_uncore.h @@ -106,10 +106,6 @@ struct intel_uncore { enum forcewake_domains fw_domains_active; enum forcewake_domains fw_domains_saved; /* user domains saved for S3 */ - u32 fw_set; - u32 fw_clear; - u32 fw_reset; - struct intel_uncore_forcewake_domain { enum forcewake_domain_id id; enum forcewake_domains mask; -- 2.30.2