drm/i915: move regs pointer inside the uncore structure

This will allow futher simplifications in the uncore handling.

v2: move register access setup under uncore (Chris)
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>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190319183543.13679-8-daniele.ceraolospurio@intel.com

drivers/gpu/drm/i915/i915_drv.c

@@ -968,46 +968,6 @@ static void i915_driver_cleanup_early(struct drm_i915_private *dev_priv)
 	i915_engines_cleanup(dev_priv);
 }
 
-static int i915_mmio_setup(struct drm_i915_private *dev_priv)
-{
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-	int mmio_bar;
-	int mmio_size;
-
-	mmio_bar = IS_GEN(dev_priv, 2) ? 1 : 0;
-	/*
-	 * Before gen4, the registers and the GTT are behind different BARs.
-	 * However, from gen4 onwards, the registers and the GTT are shared
-	 * in the same BAR, so we want to restrict this ioremap from
-	 * clobbering the GTT which we want ioremap_wc instead. Fortunately,
-	 * the register BAR remains the same size for all the earlier
-	 * generations up to Ironlake.
-	 */
-	if (INTEL_GEN(dev_priv) < 5)
-		mmio_size = 512 * 1024;
-	else
-		mmio_size = 2 * 1024 * 1024;
-	dev_priv->regs = pci_iomap(pdev, mmio_bar, mmio_size);
-	if (dev_priv->regs == NULL) {
-		DRM_ERROR("failed to map registers\n");
-
-		return -EIO;
-	}
-
-	/* Try to make sure MCHBAR is enabled before poking at it */
-	intel_setup_mchbar(dev_priv);
-
-	return 0;
-}
-
-static void i915_mmio_cleanup(struct drm_i915_private *dev_priv)
-{
-	struct pci_dev *pdev = dev_priv->drm.pdev;
-
-	intel_teardown_mchbar(dev_priv);
-	pci_iounmap(pdev, dev_priv->regs);
-}
-
 /**
  * i915_driver_init_mmio - setup device MMIO
  * @dev_priv: device private
@@ -1027,11 +987,12 @@ static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
 	if (i915_get_bridge_dev(dev_priv))
 		return -EIO;
 
-	ret = i915_mmio_setup(dev_priv);
+	ret = intel_uncore_init(&dev_priv->uncore);
 	if (ret < 0)
 		goto err_bridge;
 
-	intel_uncore_init(&dev_priv->uncore);
+	/* Try to make sure MCHBAR is enabled before poking at it */
+	intel_setup_mchbar(dev_priv);
 
 	intel_device_info_init_mmio(dev_priv);
 
@@ -1048,8 +1009,8 @@ static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
 	return 0;
 
 err_uncore:
+	intel_teardown_mchbar(dev_priv);
 	intel_uncore_fini(&dev_priv->uncore);
-	i915_mmio_cleanup(dev_priv);
 err_bridge:
 	pci_dev_put(dev_priv->bridge_dev);
 
@@ -1062,8 +1023,8 @@ static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
  */
 static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)
 {
+	intel_teardown_mchbar(dev_priv);
 	intel_uncore_fini(&dev_priv->uncore);
-	i915_mmio_cleanup(dev_priv);
 	pci_dev_put(dev_priv->bridge_dev);
 }
 

drivers/gpu/drm/i915/i915_drv.h

@@ -1505,8 +1505,6 @@ struct drm_i915_private {
 	 */
 	resource_size_t stolen_usable_size;	/* Total size minus reserved ranges */
 
-	void __iomem *regs;
-
 	struct intel_uncore uncore;
 
 	struct i915_virtual_gpu vgpu;
@@ -3489,14 +3487,14 @@ static inline u64 intel_rc6_residency_us(struct drm_i915_private *dev_priv,
 static inline uint##x##_t __raw_i915_read##x(const struct drm_i915_private *dev_priv, \
 					     i915_reg_t reg) \
 { \
-	return read##s(dev_priv->regs + i915_mmio_reg_offset(reg)); \
+	return read##s(dev_priv->uncore.regs + i915_mmio_reg_offset(reg)); \
 }
 
 #define __raw_write(x, s) \
 static inline void __raw_i915_write##x(const struct drm_i915_private *dev_priv, \
 				       i915_reg_t reg, uint##x##_t val) \
 { \
-	write##s(val, dev_priv->regs + i915_mmio_reg_offset(reg)); \
+	write##s(val, dev_priv->uncore.regs + i915_mmio_reg_offset(reg)); \
 }
 __raw_read(8, b)
 __raw_read(16, w)

drivers/gpu/drm/i915/i915_irq.c

@@ -268,7 +268,7 @@ static bool gen11_reset_one_iir(struct drm_i915_private * const i915,
 				const unsigned int bank,
 				const unsigned int bit)
 {
-	void __iomem * const regs = i915->regs;
+	void __iomem * const regs = i915->uncore.regs;
 	u32 dw;
 
 	lockdep_assert_held(&i915->irq_lock);
@@ -1479,7 +1479,7 @@ gen8_cs_irq_handler(struct intel_engine_cs *engine, u32 iir)
 static void gen8_gt_irq_ack(struct drm_i915_private *i915,
 			    u32 master_ctl, u32 gt_iir[4])
 {
-	void __iomem * const regs = i915->regs;
+	void __iomem * const regs = i915->uncore.regs;
 
 #define GEN8_GT_IRQS (GEN8_GT_RCS_IRQ | \
 		      GEN8_GT_BCS_IRQ | \
@@ -2876,7 +2876,7 @@ static inline void gen8_master_intr_enable(void __iomem * const regs)
 static irqreturn_t gen8_irq_handler(int irq, void *arg)
 {
 	struct drm_i915_private *dev_priv = to_i915(arg);
-	void __iomem * const regs = dev_priv->regs;
+	void __iomem * const regs = dev_priv->uncore.regs;
 	u32 master_ctl;
 	u32 gt_iir[4];
 
@@ -2910,7 +2910,7 @@ static u32
 gen11_gt_engine_identity(struct drm_i915_private * const i915,
 			 const unsigned int bank, const unsigned int bit)
 {
-	void __iomem * const regs = i915->regs;
+	void __iomem * const regs = i915->uncore.regs;
 	u32 timeout_ts;
 	u32 ident;
 
@@ -2994,7 +2994,7 @@ static void
 gen11_gt_bank_handler(struct drm_i915_private * const i915,
 		      const unsigned int bank)
 {
-	void __iomem * const regs = i915->regs;
+	void __iomem * const regs = i915->uncore.regs;
 	unsigned long intr_dw;
 	unsigned int bit;
 
@@ -3037,7 +3037,7 @@ gen11_gt_irq_handler(struct drm_i915_private * const i915,
 static u32
 gen11_gu_misc_irq_ack(struct drm_i915_private *dev_priv, const u32 master_ctl)
 {
-	void __iomem * const regs = dev_priv->regs;
+	void __iomem * const regs = dev_priv->uncore.regs;
 	u32 iir;
 
 	if (!(master_ctl & GEN11_GU_MISC_IRQ))
@@ -3078,7 +3078,7 @@ static inline void gen11_master_intr_enable(void __iomem * const regs)
 static irqreturn_t gen11_irq_handler(int irq, void *arg)
 {
 	struct drm_i915_private * const i915 = to_i915(arg);
-	void __iomem * const regs = i915->regs;
+	void __iomem * const regs = i915->uncore.regs;
 	u32 master_ctl;
 	u32 gu_misc_iir;
 
@@ -3359,7 +3359,7 @@ static void gen8_irq_reset(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	int pipe;
 
-	gen8_master_intr_disable(dev_priv->regs);
+	gen8_master_intr_disable(dev_priv->uncore.regs);
 
 	gen8_gt_irq_reset(dev_priv);
 
@@ -3401,7 +3401,7 @@ static void gen11_irq_reset(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int pipe;
 
-	gen11_master_intr_disable(dev_priv->regs);
+	gen11_master_intr_disable(dev_priv->uncore.regs);
 
 	gen11_gt_irq_reset(dev_priv);
 
@@ -4006,7 +4006,7 @@ static int gen8_irq_postinstall(struct drm_device *dev)
 	if (HAS_PCH_SPLIT(dev_priv))
 		ibx_irq_postinstall(dev);
 
-	gen8_master_intr_enable(dev_priv->regs);
+	gen8_master_intr_enable(dev_priv->uncore.regs);
 
 	return 0;
 }
@@ -4068,7 +4068,7 @@ static int gen11_irq_postinstall(struct drm_device *dev)
 
 	I915_WRITE(GEN11_DISPLAY_INT_CTL, GEN11_DISPLAY_IRQ_ENABLE);
 
-	gen11_master_intr_enable(dev_priv->regs);
+	gen11_master_intr_enable(dev_priv->uncore.regs);
 	POSTING_READ(GEN11_GFX_MSTR_IRQ);
 
 	return 0;

drivers/gpu/drm/i915/intel_lrc.c

@@ -2409,12 +2409,12 @@ static int logical_ring_init(struct intel_engine_cs *engine)
 	intel_engine_init_workarounds(engine);
 
 	if (HAS_LOGICAL_RING_ELSQ(i915)) {
-		execlists->submit_reg = i915->regs +
+		execlists->submit_reg = i915->uncore.regs +
 			i915_mmio_reg_offset(RING_EXECLIST_SQ_CONTENTS(engine));
-		execlists->ctrl_reg = i915->regs +
+		execlists->ctrl_reg = i915->uncore.regs +
 			i915_mmio_reg_offset(RING_EXECLIST_CONTROL(engine));
 	} else {
-		execlists->submit_reg = i915->regs +
+		execlists->submit_reg = i915->uncore.regs +
 			i915_mmio_reg_offset(RING_ELSP(engine));
 	}
 

drivers/gpu/drm/i915/intel_uncore.c

@@ -1330,7 +1330,6 @@ static void fw_domain_init(struct intel_uncore *uncore,
 			   i915_reg_t reg_ack)
 {
 	struct intel_uncore_forcewake_domain *d;
-	struct drm_i915_private *i915 = uncore_to_i915(uncore);
 
 	if (WARN_ON(domain_id >= FW_DOMAIN_ID_COUNT))
 		return;
@@ -1343,8 +1342,8 @@ static void fw_domain_init(struct intel_uncore *uncore,
 	WARN_ON(!i915_mmio_reg_valid(reg_ack));
 
 	d->wake_count = 0;
-	d->reg_set = i915->regs + i915_mmio_reg_offset(reg_set);
-	d->reg_ack = i915->regs + i915_mmio_reg_offset(reg_ack);
+	d->reg_set = uncore->regs + i915_mmio_reg_offset(reg_set);
+	d->reg_ack = uncore->regs + i915_mmio_reg_offset(reg_ack);
 
 	d->id = domain_id;
 
@@ -1539,9 +1538,53 @@ static int i915_pmic_bus_access_notifier(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
-void intel_uncore_init(struct intel_uncore *uncore)
+static int uncore_mmio_setup(struct intel_uncore *uncore)
 {
 	struct drm_i915_private *i915 = uncore_to_i915(uncore);
+	struct pci_dev *pdev = i915->drm.pdev;
+	int mmio_bar;
+	int mmio_size;
+
+	mmio_bar = IS_GEN(i915, 2) ? 1 : 0;
+	/*
+	 * Before gen4, the registers and the GTT are behind different BARs.
+	 * However, from gen4 onwards, the registers and the GTT are shared
+	 * in the same BAR, so we want to restrict this ioremap from
+	 * clobbering the GTT which we want ioremap_wc instead. Fortunately,
+	 * the register BAR remains the same size for all the earlier
+	 * generations up to Ironlake.
+	 */
+	if (INTEL_GEN(i915) < 5)
+		mmio_size = 512 * 1024;
+	else
+		mmio_size = 2 * 1024 * 1024;
+	uncore->regs = pci_iomap(pdev, mmio_bar, mmio_size);
+	if (uncore->regs == NULL) {
+		DRM_ERROR("failed to map registers\n");
+
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static void uncore_mmio_cleanup(struct intel_uncore *uncore)
+{
+	struct drm_i915_private *i915 = uncore_to_i915(uncore);
+	struct pci_dev *pdev = i915->drm.pdev;
+
+	pci_iounmap(pdev, uncore->regs);
+}
+
+
+int intel_uncore_init(struct intel_uncore *uncore)
+{
+	struct drm_i915_private *i915 = uncore_to_i915(uncore);
+	int ret;
+
+	ret = uncore_mmio_setup(uncore);
+	if (ret)
+		return ret;
 
 	i915_check_vgpu(i915);
 
@@ -1589,6 +1632,8 @@ void intel_uncore_init(struct intel_uncore *uncore)
 	}
 
 	iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
+
+	return 0;
 }
 
 /*
@@ -1637,6 +1682,7 @@ void intel_uncore_fini(struct intel_uncore *uncore)
 		&uncore->pmic_bus_access_nb);
 	intel_uncore_forcewake_reset(uncore);
 	iosf_mbi_punit_release();
+	uncore_mmio_cleanup(uncore);
 }
 
 static const struct reg_whitelist {

drivers/gpu/drm/i915/intel_uncore.h

@@ -93,6 +93,8 @@ struct intel_forcewake_range {
 };
 
 struct intel_uncore {
+	void __iomem *regs;
+
 	spinlock_t lock; /** lock is also taken in irq contexts. */
 
 	const struct intel_forcewake_range *fw_domains_table;
@@ -142,7 +144,7 @@ forcewake_domain_to_uncore(const struct intel_uncore_forcewake_domain *d)
 }
 
 void intel_uncore_sanitize(struct drm_i915_private *dev_priv);
-void intel_uncore_init(struct intel_uncore *uncore);
+int intel_uncore_init(struct intel_uncore *uncore);
 void intel_uncore_prune(struct intel_uncore *uncore);
 bool intel_uncore_unclaimed_mmio(struct drm_i915_private *dev_priv);
 bool intel_uncore_arm_unclaimed_mmio_detection(struct drm_i915_private *dev_priv);

drivers/gpu/drm/i915/selftests/intel_uncore.c

@@ -177,7 +177,7 @@ static int live_forcewake_ops(void *arg)
 
 	for_each_engine(engine, i915, id) {
 		i915_reg_t mmio = _MMIO(engine->mmio_base + r->offset);
-		u32 __iomem *reg = i915->regs + engine->mmio_base + r->offset;
+		u32 __iomem *reg = uncore->regs + engine->mmio_base + r->offset;
 		enum forcewake_domains fw_domains;
 		u32 val;