1 files changed, 371 insertions, 40 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index a108c7ed14f..16807afab36 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -25,24 +25,52 @@
  *          Alex Deucher
  *          Jerome Glisse
  */
-#include "drmP.h"
-#include "drm_crtc_helper.h"
-#include "radeon_drm.h"
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/radeon_drm.h>
 #include "radeon_reg.h"
 #include "radeon.h"
 #include "atom.h"
 
-irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
+#include <linux/pm_runtime.h>
+
+#define RADEON_WAIT_IDLE_TIMEOUT 200
+
+/**
+ * radeon_driver_irq_handler_kms - irq handler for KMS
+ *
+ * @int irq, void *arg: args
+ *
+ * This is the irq handler for the radeon KMS driver (all asics).
+ * radeon_irq_process is a macro that points to the per-asic
+ * irq handler callback.
+ */
+irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
 {
 	struct drm_device *dev = (struct drm_device *) arg;
 	struct radeon_device *rdev = dev->dev_private;
+	irqreturn_t ret;
 
-	return radeon_irq_process(rdev);
+	ret = radeon_irq_process(rdev);
+	if (ret == IRQ_HANDLED)
+		pm_runtime_mark_last_busy(dev->dev);
+	return ret;
 }
 
 /*
  * Handle hotplug events outside the interrupt handler proper.
  */
+/**
+ * radeon_hotplug_work_func - display hotplug work handler
+ *
+ * @work: work struct
+ *
+ * This is the hot plug event work handler (all asics).
+ * The work gets scheduled from the irq handler if there
+ * was a hot plug interrupt.  It walks the connector table
+ * and calls the hotplug handler for each one, then sends
+ * a drm hotplug event to alert userspace.
+ */
 static void radeon_hotplug_work_func(struct work_struct *work)
 {
 	struct radeon_device *rdev = container_of(work, struct radeon_device,
@@ -59,86 +87,224 @@ static void radeon_hotplug_work_func(struct work_struct *work)
 	drm_helper_hpd_irq_event(dev);
 }
 
+/**
+ * radeon_irq_reset_work_func - execute gpu reset
+ *
+ * @work: work struct
+ *
+ * Execute scheduled gpu reset (cayman+).
+ * This function is called when the irq handler
+ * thinks we need a gpu reset.
+ */
+static void radeon_irq_reset_work_func(struct work_struct *work)
+{
+	struct radeon_device *rdev = container_of(work, struct radeon_device,
+						  reset_work);
+
+	radeon_gpu_reset(rdev);
+}
+
+/**
+ * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
+ *
+ * @dev: drm dev pointer
+ *
+ * Gets the hw ready to enable irqs (all asics).
+ * This function disables all interrupt sources on the GPU.
+ */
 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
 {
 	struct radeon_device *rdev = dev->dev_private;
+	unsigned long irqflags;
 	unsigned i;
 
-	INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
-
+	spin_lock_irqsave(&rdev->irq.lock, irqflags);
 	/* Disable *all* interrupts */
-	rdev->irq.sw_int = false;
-	rdev->irq.gui_idle = false;
-	for (i = 0; i < rdev->num_crtc; i++)
-		rdev->irq.crtc_vblank_int[i] = false;
-	for (i = 0; i < 6; i++)
+	for (i = 0; i < RADEON_NUM_RINGS; i++)
+		atomic_set(&rdev->irq.ring_int[i], 0);
+	rdev->irq.dpm_thermal = false;
+	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
 		rdev->irq.hpd[i] = false;
+	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
+		rdev->irq.crtc_vblank_int[i] = false;
+		atomic_set(&rdev->irq.pflip[i], 0);
+		rdev->irq.afmt[i] = false;
+	}
 	radeon_irq_set(rdev);
+	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 	/* Clear bits */
 	radeon_irq_process(rdev);
 }
 
+/**
+ * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
+ *
+ * @dev: drm dev pointer
+ *
+ * Handles stuff to be done after enabling irqs (all asics).
+ * Returns 0 on success.
+ */
 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
 {
-	struct radeon_device *rdev = dev->dev_private;
-
 	dev->max_vblank_count = 0x001fffff;
-	rdev->irq.sw_int = true;
-	radeon_irq_set(rdev);
 	return 0;
 }
 
+/**
+ * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
+ *
+ * @dev: drm dev pointer
+ *
+ * This function disables all interrupt sources on the GPU (all asics).
+ */
 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
 {
 	struct radeon_device *rdev = dev->dev_private;
+	unsigned long irqflags;
 	unsigned i;
 
 	if (rdev == NULL) {
 		return;
 	}
+	spin_lock_irqsave(&rdev->irq.lock, irqflags);
 	/* Disable *all* interrupts */
-	rdev->irq.sw_int = false;
-	rdev->irq.gui_idle = false;
-	for (i = 0; i < rdev->num_crtc; i++)
-		rdev->irq.crtc_vblank_int[i] = false;
-	for (i = 0; i < 6; i++)
+	for (i = 0; i < RADEON_NUM_RINGS; i++)
+		atomic_set(&rdev->irq.ring_int[i], 0);
+	rdev->irq.dpm_thermal = false;
+	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
 		rdev->irq.hpd[i] = false;
+	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
+		rdev->irq.crtc_vblank_int[i] = false;
+		atomic_set(&rdev->irq.pflip[i], 0);
+		rdev->irq.afmt[i] = false;
+	}
 	radeon_irq_set(rdev);
+	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 }
 
+/**
+ * radeon_msi_ok - asic specific msi checks
+ *
+ * @rdev: radeon device pointer
+ *
+ * Handles asic specific MSI checks to determine if
+ * MSIs should be enabled on a particular chip (all asics).
+ * Returns true if MSIs should be enabled, false if MSIs
+ * should not be enabled.
+ */
+static bool radeon_msi_ok(struct radeon_device *rdev)
+{
+	/* RV370/RV380 was first asic with MSI support */
+	if (rdev->family < CHIP_RV380)
+		return false;
+
+	/* MSIs don't work on AGP */
+	if (rdev->flags & RADEON_IS_AGP)
+		return false;
+
+	/* force MSI on */
+	if (radeon_msi == 1)
+		return true;
+	else if (radeon_msi == 0)
+		return false;
+
+	/* Quirks */
+	/* HP RS690 only seems to work with MSIs. */
+	if ((rdev->pdev->device == 0x791f) &&
+	    (rdev->pdev->subsystem_vendor == 0x103c) &&
+	    (rdev->pdev->subsystem_device == 0x30c2))
+		return true;
+
+	/* Dell RS690 only seems to work with MSIs. */
+	if ((rdev->pdev->device == 0x791f) &&
+	    (rdev->pdev->subsystem_vendor == 0x1028) &&
+	    (rdev->pdev->subsystem_device == 0x01fc))
+		return true;
+
+	/* Dell RS690 only seems to work with MSIs. */
+	if ((rdev->pdev->device == 0x791f) &&
+	    (rdev->pdev->subsystem_vendor == 0x1028) &&
+	    (rdev->pdev->subsystem_device == 0x01fd))
+		return true;
+
+	/* Gateway RS690 only seems to work with MSIs. */
+	if ((rdev->pdev->device == 0x791f) &&
+	    (rdev->pdev->subsystem_vendor == 0x107b) &&
+	    (rdev->pdev->subsystem_device == 0x0185))
+		return true;
+
+	/* try and enable MSIs by default on all RS690s */
+	if (rdev->family == CHIP_RS690)
+		return true;
+
+	/* RV515 seems to have MSI issues where it loses
+	 * MSI rearms occasionally. This leads to lockups and freezes.
+	 * disable it by default.
+	 */
+	if (rdev->family == CHIP_RV515)
+		return false;
+	if (rdev->flags & RADEON_IS_IGP) {
+		/* APUs work fine with MSIs */
+		if (rdev->family >= CHIP_PALM)
+			return true;
+		/* lots of IGPs have problems with MSIs */
+		return false;
+	}
+
+	return true;
+}
+
+/**
+ * radeon_irq_kms_init - init driver interrupt info
+ *
+ * @rdev: radeon device pointer
+ *
+ * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
+ * Returns 0 for success, error for failure.
+ */
 int radeon_irq_kms_init(struct radeon_device *rdev)
 {
 	int r = 0;
 
-	spin_lock_init(&rdev->irq.sw_lock);
+	spin_lock_init(&rdev->irq.lock);
 	r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
 	if (r) {
 		return r;
 	}
 	/* enable msi */
 	rdev->msi_enabled = 0;
-	/* MSIs don't seem to work reliably on all IGP
-	 * chips.  Disable MSI on them for now.
-	 */
-	if ((rdev->family >= CHIP_RV380) &&
-	    (!(rdev->flags & RADEON_IS_IGP)) &&
-	    (!(rdev->flags & RADEON_IS_AGP))) {
+
+	if (radeon_msi_ok(rdev)) {
 		int ret = pci_enable_msi(rdev->pdev);
 		if (!ret) {
 			rdev->msi_enabled = 1;
 			dev_info(rdev->dev, "radeon: using MSI.\n");
 		}
 	}
+
+	INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
+	INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
+	INIT_WORK(&rdev->reset_work, radeon_irq_reset_work_func);
+
 	rdev->irq.installed = true;
-	r = drm_irq_install(rdev->ddev);
+	r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
 	if (r) {
 		rdev->irq.installed = false;
+		flush_work(&rdev->hotplug_work);
 		return r;
 	}
+
 	DRM_INFO("radeon: irq initialized.\n");
 	return 0;
 }
 
+/**
+ * radeon_irq_kms_fini - tear down driver interrupt info
+ *
+ * @rdev: radeon device pointer
+ *
+ * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
+ */
 void radeon_irq_kms_fini(struct radeon_device *rdev)
 {
 	drm_vblank_cleanup(rdev->ddev);
@@ -147,31 +313,196 @@ void radeon_irq_kms_fini(struct radeon_device *rdev)
 		rdev->irq.installed = false;
 		if (rdev->msi_enabled)
 			pci_disable_msi(rdev->pdev);
+		flush_work(&rdev->hotplug_work);
+	}
+}
+
+/**
+ * radeon_irq_kms_sw_irq_get - enable software interrupt
+ *
+ * @rdev: radeon device pointer
+ * @ring: ring whose interrupt you want to enable
+ *
+ * Enables the software interrupt for a specific ring (all asics).
+ * The software interrupt is generally used to signal a fence on
+ * a particular ring.
+ */
+void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
+{
+	unsigned long irqflags;
+
+	if (!rdev->ddev->irq_enabled)
+		return;
+
+	if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
+		spin_lock_irqsave(&rdev->irq.lock, irqflags);
+		radeon_irq_set(rdev);
+		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 	}
 }
 
-void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev)
+/**
+ * radeon_irq_kms_sw_irq_put - disable software interrupt
+ *
+ * @rdev: radeon device pointer
+ * @ring: ring whose interrupt you want to disable
+ *
+ * Disables the software interrupt for a specific ring (all asics).
+ * The software interrupt is generally used to signal a fence on
+ * a particular ring.
+ */
+void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
+{
+	unsigned long irqflags;
+
+	if (!rdev->ddev->irq_enabled)
+		return;
+
+	if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
+		spin_lock_irqsave(&rdev->irq.lock, irqflags);
+		radeon_irq_set(rdev);
+		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
+	}
+}
+
+/**
+ * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
+ *
+ * @rdev: radeon device pointer
+ * @crtc: crtc whose interrupt you want to enable
+ *
+ * Enables the pageflip interrupt for a specific crtc (all asics).
+ * For pageflips we use the vblank interrupt source.
+ */
+void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
 {
 	unsigned long irqflags;
 
-	spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
-	if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) {
-		rdev->irq.sw_int = true;
+	if (crtc < 0 || crtc >= rdev->num_crtc)
+		return;
+
+	if (!rdev->ddev->irq_enabled)
+		return;
+
+	if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
+		spin_lock_irqsave(&rdev->irq.lock, irqflags);
 		radeon_irq_set(rdev);
+		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 	}
-	spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
 }
 
-void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev)
+/**
+ * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
+ *
+ * @rdev: radeon device pointer
+ * @crtc: crtc whose interrupt you want to disable
+ *
+ * Disables the pageflip interrupt for a specific crtc (all asics).
+ * For pageflips we use the vblank interrupt source.
+ */
+void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
 {
 	unsigned long irqflags;
 
-	spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
-	BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0);
-	if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) {
-		rdev->irq.sw_int = false;
+	if (crtc < 0 || crtc >= rdev->num_crtc)
+		return;
+
+	if (!rdev->ddev->irq_enabled)
+		return;
+
+	if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
+		spin_lock_irqsave(&rdev->irq.lock, irqflags);
 		radeon_irq_set(rdev);
+		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 	}
-	spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
+}
+
+/**
+ * radeon_irq_kms_enable_afmt - enable audio format change interrupt
+ *
+ * @rdev: radeon device pointer
+ * @block: afmt block whose interrupt you want to enable
+ *
+ * Enables the afmt change interrupt for a specific afmt block (all asics).
+ */
+void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
+{
+	unsigned long irqflags;
+
+	if (!rdev->ddev->irq_enabled)
+		return;
+
+	spin_lock_irqsave(&rdev->irq.lock, irqflags);
+	rdev->irq.afmt[block] = true;
+	radeon_irq_set(rdev);
+	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
+
+}
+
+/**
+ * radeon_irq_kms_disable_afmt - disable audio format change interrupt
+ *
+ * @rdev: radeon device pointer
+ * @block: afmt block whose interrupt you want to disable
+ *
+ * Disables the afmt change interrupt for a specific afmt block (all asics).
+ */
+void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
+{
+	unsigned long irqflags;
+
+	if (!rdev->ddev->irq_enabled)
+		return;
+
+	spin_lock_irqsave(&rdev->irq.lock, irqflags);
+	rdev->irq.afmt[block] = false;
+	radeon_irq_set(rdev);
+	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
+}
+
+/**
+ * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
+ *
+ * @rdev: radeon device pointer
+ * @hpd_mask: mask of hpd pins you want to enable.
+ *
+ * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
+ */
+void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
+{
+	unsigned long irqflags;
+	int i;
+
+	if (!rdev->ddev->irq_enabled)
+		return;
+
+	spin_lock_irqsave(&rdev->irq.lock, irqflags);
+	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
+		rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
+	radeon_irq_set(rdev);
+	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
+}
+
+/**
+ * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
+ *
+ * @rdev: radeon device pointer
+ * @hpd_mask: mask of hpd pins you want to disable.
+ *
+ * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
+ */
+void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
+{
+	unsigned long irqflags;
+	int i;
+
+	if (!rdev->ddev->irq_enabled)
+		return;
+
+	spin_lock_irqsave(&rdev->irq.lock, irqflags);
+	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
+		rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
+	radeon_irq_set(rdev);
+	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
 }