[Intel-gfx] [PATCH 4/6] drm/i915: make reserved struct resource centric

[Matthew Auld]

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h        |  2 ++
 drivers/gpu/drm/i915/i915_gem_gtt.h    |  2 --
 drivers/gpu/drm/i915/i915_gem_stolen.c | 16 ++++++++--------
 drivers/gpu/drm/i915/intel_pm.c        |  6 ++----
 4 files changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 6136f92d5188..fb987e8ffe23 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2251,6 +2251,8 @@ struct drm_i915_private {
 
 	struct resource dsm;
 
+	struct resource dsm_reserved;
+
 	void __iomem *regs;
 
 	struct intel_uncore uncore;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 922d796983d5..6eb34fd2c4ba 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -383,8 +383,6 @@ struct i915_ggtt {
 	 */
 	u32 stolen_size;		/* Total size of stolen memory */
 	u32 stolen_usable_size;	/* Total size minus reserved ranges */
-	u32 stolen_reserved_base;
-	u32 stolen_reserved_size;
 
 	/** "Graphics Stolen Memory" holds the global PTEs */
 	void __iomem *gsm;
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 36c8ec04fd7a..2b7af60dfce0 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -333,6 +333,7 @@ static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
 int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 {
 	struct i915_ggtt *ggtt = &dev_priv->ggtt;
+	struct resource reserved = DEFINE_RES_MEM(0, 0);
 	dma_addr_t reserved_base, stolen_top;
 	u32 reserved_total, reserved_size;
 	u32 stolen_usable_start;
@@ -400,17 +401,16 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 		reserved_base = stolen_top;
 	}
 
-	if (reserved_base < dev_priv->dsm.start ||
-	    reserved_base + reserved_size > stolen_top) {
-		dma_addr_t reserved_top = reserved_base + reserved_size;
-		DRM_ERROR("Stolen reserved area [%pad - %pad] outside stolen memory [%pad - %pad]\n",
-			  &reserved_base, &reserved_top,
-			  &dev_priv->dsm.start, &stolen_top);
+	reserved.start = reserved_base;
+	reserved.end = reserved_base + reserved_size - 1;
+
+	if (!resource_contains(&dev_priv->dsm, &reserved)) {
+		DRM_ERROR("Stolen reserved area %pR outside stolen memory %pR\n",
+			  &reserved, &dev_priv->dsm);
 		return 0;
 	}
 
-	ggtt->stolen_reserved_base = reserved_base;
-	ggtt->stolen_reserved_size = reserved_size;
+	dev_priv->dsm_reserved = reserved;
 
 	/* It is possible for the reserved area to end before the end of stolen
 	 * memory, so just consider the start. */
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 4a326bbdac6c..bebe355d1660 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6439,7 +6439,6 @@ static void intel_print_rc6_info(struct drm_i915_private *dev_priv, u32 mode)
 
 static bool bxt_check_bios_rc6_setup(struct drm_i915_private *dev_priv)
 {
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	bool enable_rc6 = true;
 	unsigned long rc6_ctx_base;
 	u32 rc_ctl;
@@ -6464,9 +6463,8 @@ static bool bxt_check_bios_rc6_setup(struct drm_i915_private *dev_priv)
 	 * for this check.
 	 */
 	rc6_ctx_base = I915_READ(RC6_CTX_BASE) & RC6_CTX_BASE_MASK;
-	if (!((rc6_ctx_base >= ggtt->stolen_reserved_base) &&
-	      (rc6_ctx_base + PAGE_SIZE <= ggtt->stolen_reserved_base +
-					ggtt->stolen_reserved_size))) {
+	if (!((rc6_ctx_base >= dev_priv->dsm_reserved.start) &&
+	      (rc6_ctx_base + PAGE_SIZE <= dev_priv->dsm_reserved.end + 1))) {
 		DRM_DEBUG_DRIVER("RC6 Base address not as expected.\n");
 		enable_rc6 = false;
 	}
-- 
2.14.3