From f2e4d76ec2b16e8edcbcf6703f4a64c0ce8178b8 Mon Sep 17 00:00:00 2001
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Date: Fri, 28 Apr 2017 10:53:37 +0300
Subject: [PATCH] drm/i915: Eliminate HAS_HW_CONTEXTS
Mime-version: 1.0
Content-type: text/plain; charset=UTF-8
Content-transfer-encoding: 8bit
Git-commit: f2e4d76ec2b16e8edcbcf6703f4a64c0ce8178b8
Patch-mainline: v4.13-rc1
References: FATE#322643 bsc#1055900

HAS_HW_CONTEXTS is misleading condition for GPU reset and CCID,
replace it with Gen specific (to be updated in next patches).

HAS_HW_CONTEXTS in i915_l3_write is bogus because each HAS_L3_DPF
match also has .has_hw_contexts = 1 set.

This leads to us being able to get rid of the property completely.

V2: 
- Keep the checks at Gen6 for no functional change (Ville)

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/i915_drv.h       |    2 --
 drivers/gpu/drm/i915/i915_gem.c       |    2 +-
 drivers/gpu/drm/i915/i915_gpu_error.c |    6 +++---
 drivers/gpu/drm/i915/i915_pci.c       |    5 -----
 drivers/gpu/drm/i915/i915_sysfs.c     |    3 ---
 5 files changed, 4 insertions(+), 14 deletions(-)

--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -823,7 +823,6 @@ struct intel_csr {
 	func(has_gmch_display); \
 	func(has_guc); \
 	func(has_hotplug); \
-	func(has_hw_contexts); \
 	func(has_l3_dpf); \
 	func(has_llc); \
 	func(has_logical_ring_contexts); \
@@ -2867,7 +2866,6 @@ intel_info(const struct drm_i915_private
 
 #define HWS_NEEDS_PHYSICAL(dev_priv)	((dev_priv)->info.hws_needs_physical)
 
-#define HAS_HW_CONTEXTS(dev_priv)	    ((dev_priv)->info.has_hw_contexts)
 #define HAS_LOGICAL_RING_CONTEXTS(dev_priv) \
 		((dev_priv)->info.has_logical_ring_contexts)
 #define USES_PPGTT(dev_priv)		(i915.enable_ppgtt)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4513,7 +4513,7 @@ void i915_gem_sanitize(struct drm_i915_p
 	 * of the reset, so we only reset recent machines with logical
 	 * context support (that must be reset to remove any stray contexts).
 	 */
-	if (HAS_HW_CONTEXTS(i915)) {
+	if (INTEL_GEN(i915) >= 6) {
 		int reset = intel_gpu_reset(i915, ALL_ENGINES);
 		WARN_ON(reset && reset != -ENODEV);
 	}
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1598,6 +1598,9 @@ static void i915_capture_reg_state(struc
 		error->done_reg = I915_READ(DONE_REG);
 	}
 
+	if (INTEL_GEN(dev_priv) >= 6)
+		error->ccid = I915_READ(CCID);
+
 	/* 3: Feature specific registers */
 	if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv)) {
 		error->gam_ecochk = I915_READ(GAM_ECOCHK);
@@ -1605,9 +1608,6 @@ static void i915_capture_reg_state(struc
 	}
 
 	/* 4: Everything else */
-	if (HAS_HW_CONTEXTS(dev_priv))
-		error->ccid = I915_READ(CCID);
-
 	if (INTEL_GEN(dev_priv) >= 8) {
 		error->ier = I915_READ(GEN8_DE_MISC_IER);
 		for (i = 0; i < 4; i++)
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -220,7 +220,6 @@ static const struct intel_device_info in
 	.has_rc6 = 1, \
 	.has_rc6p = 1, \
 	.has_gmbus_irq = 1, \
-	.has_hw_contexts = 1, \
 	.has_aliasing_ppgtt = 1, \
 	GEN_DEFAULT_PIPEOFFSETS, \
 	CURSOR_OFFSETS
@@ -245,7 +244,6 @@ static const struct intel_device_info in
 	.has_rc6 = 1, \
 	.has_rc6p = 1, \
 	.has_gmbus_irq = 1, \
-	.has_hw_contexts = 1, \
 	.has_aliasing_ppgtt = 1, \
 	.has_full_ppgtt = 1, \
 	GEN_DEFAULT_PIPEOFFSETS, \
@@ -280,7 +278,6 @@ static const struct intel_device_info in
 	.has_runtime_pm = 1,
 	.has_rc6 = 1,
 	.has_gmbus_irq = 1,
-	.has_hw_contexts = 1,
 	.has_gmch_display = 1,
 	.has_hotplug = 1,
 	.has_aliasing_ppgtt = 1,
@@ -340,7 +337,6 @@ static const struct intel_device_info in
 	.has_resource_streamer = 1,
 	.has_rc6 = 1,
 	.has_gmbus_irq = 1,
-	.has_hw_contexts = 1,
 	.has_logical_ring_contexts = 1,
 	.has_gmch_display = 1,
 	.has_aliasing_ppgtt = 1,
@@ -387,7 +383,6 @@ static const struct intel_device_info in
 	.has_rc6 = 1, \
 	.has_dp_mst = 1, \
 	.has_gmbus_irq = 1, \
-	.has_hw_contexts = 1, \
 	.has_logical_ring_contexts = 1, \
 	.has_guc = 1, \
 	.has_aliasing_ppgtt = 1, \
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -185,9 +185,6 @@ i915_l3_write(struct file *filp, struct
 	int slice = (int)(uintptr_t)attr->private;
 	int ret;
 
-	if (!HAS_HW_CONTEXTS(dev_priv))
-		return -ENXIO;
-
 	ret = l3_access_valid(dev_priv, offset);
 	if (ret)
 		return ret;