1 files changed, 383 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_irq.c b/drivers/gpu/drm/radeon/radeon_irq.c
new file mode 100644
index 0000000..8289e16
--- /dev/null
+++ b/drivers/gpu/drm/radeon/radeon_irq.c
@@ -0,0 +1,383 @@
+/* radeon_irq.c -- IRQ handling for radeon -*- linux-c -*- */
+/*
+ * Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
+ *
+ * The Weather Channel (TM) funded Tungsten Graphics to develop the
+ * initial release of the Radeon 8500 driver under the XFree86 license.
+ * This notice must be preserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ *    Michel D�zer <michel@daenzer.net>
+ */
+
+#include "drmP.h"
+#include "drm.h"
+#include "radeon_drm.h"
+#include "radeon_drv.h"
+
+void radeon_irq_set_state(struct drm_device *dev, u32 mask, int state)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+
+	if (state)
+		dev_priv->irq_enable_reg |= mask;
+	else
+		dev_priv->irq_enable_reg &= ~mask;
+
+	if (dev->irq_enabled)
+		RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
+}
+
+static void r500_vbl_irq_set_state(struct drm_device *dev, u32 mask, int state)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+
+	if (state)
+		dev_priv->r500_disp_irq_reg |= mask;
+	else
+		dev_priv->r500_disp_irq_reg &= ~mask;
+
+	if (dev->irq_enabled)
+		RADEON_WRITE(R500_DxMODE_INT_MASK, dev_priv->r500_disp_irq_reg);
+}
+
+int radeon_enable_vblank(struct drm_device *dev, int crtc)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+
+	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690) {
+		switch (crtc) {
+		case 0:
+			r500_vbl_irq_set_state(dev, R500_D1MODE_INT_MASK, 1);
+			break;
+		case 1:
+			r500_vbl_irq_set_state(dev, R500_D2MODE_INT_MASK, 1);
+			break;
+		default:
+			DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
+				  crtc);
+			return EINVAL;
+		}
+	} else {
+		switch (crtc) {
+		case 0:
+			radeon_irq_set_state(dev, RADEON_CRTC_VBLANK_MASK, 1);
+			break;
+		case 1:
+			radeon_irq_set_state(dev, RADEON_CRTC2_VBLANK_MASK, 1);
+			break;
+		default:
+			DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
+				  crtc);
+			return EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+void radeon_disable_vblank(struct drm_device *dev, int crtc)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+
+	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690) {
+		switch (crtc) {
+		case 0:
+			r500_vbl_irq_set_state(dev, R500_D1MODE_INT_MASK, 0);
+			break;
+		case 1:
+			r500_vbl_irq_set_state(dev, R500_D2MODE_INT_MASK, 0);
+			break;
+		default:
+			DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
+				  crtc);
+			break;
+		}
+	} else {
+		switch (crtc) {
+		case 0:
+			radeon_irq_set_state(dev, RADEON_CRTC_VBLANK_MASK, 0);
+			break;
+		case 1:
+			radeon_irq_set_state(dev, RADEON_CRTC2_VBLANK_MASK, 0);
+			break;
+		default:
+			DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
+				  crtc);
+			break;
+		}
+	}
+}
+
+static inline u32 radeon_acknowledge_irqs(drm_radeon_private_t *dev_priv, u32 *r500_disp_int)
+{
+	u32 irqs = RADEON_READ(RADEON_GEN_INT_STATUS);
+	u32 irq_mask = RADEON_SW_INT_TEST;
+
+	*r500_disp_int = 0;
+	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690) {
+		/* vbl interrupts in a different place */
+
+		if (irqs & R500_DISPLAY_INT_STATUS) {
+			/* if a display interrupt */
+			u32 disp_irq;
+
+			disp_irq = RADEON_READ(R500_DISP_INTERRUPT_STATUS);
+
+			*r500_disp_int = disp_irq;
+			if (disp_irq & R500_D1_VBLANK_INTERRUPT)
+				RADEON_WRITE(R500_D1MODE_VBLANK_STATUS, R500_VBLANK_ACK);
+			if (disp_irq & R500_D2_VBLANK_INTERRUPT)
+				RADEON_WRITE(R500_D2MODE_VBLANK_STATUS, R500_VBLANK_ACK);
+		}
+		irq_mask |= R500_DISPLAY_INT_STATUS;
+	} else
+		irq_mask |= RADEON_CRTC_VBLANK_STAT | RADEON_CRTC2_VBLANK_STAT;
+
+	irqs &=	irq_mask;
+
+	if (irqs)
+		RADEON_WRITE(RADEON_GEN_INT_STATUS, irqs);
+
+	return irqs;
+}
+
+/* Interrupts - Used for device synchronization and flushing in the
+ * following circumstances:
+ *
+ * - Exclusive FB access with hw idle:
+ *    - Wait for GUI Idle (?) interrupt, then do normal flush.
+ *
+ * - Frame throttling, NV_fence:
+ *    - Drop marker irq's into command stream ahead of time.
+ *    - Wait on irq's with lock *not held*
+ *    - Check each for termination condition
+ *
+ * - Internally in cp_getbuffer, etc:
+ *    - as above, but wait with lock held???
+ *
+ * NOTE: These functions are misleadingly named -- the irq's aren't
+ * tied to dma at all, this is just a hangover from dri prehistory.
+ */
+
+irqreturn_t radeon_driver_irq_handler(DRM_IRQ_ARGS)
+{
+	struct drm_device *dev = (struct drm_device *) arg;
+	drm_radeon_private_t *dev_priv =
+	    (drm_radeon_private_t *) dev->dev_private;
+	u32 stat;
+	u32 r500_disp_int;
+
+	/* Only consider the bits we're interested in - others could be used
+	 * outside the DRM
+	 */
+	stat = radeon_acknowledge_irqs(dev_priv, &r500_disp_int);
+	if (!stat)
+		return IRQ_NONE;
+
+	stat &= dev_priv->irq_enable_reg;
+
+	/* SW interrupt */
+	if (stat & RADEON_SW_INT_TEST)
+		DRM_WAKEUP(&dev_priv->swi_queue);
+
+	/* VBLANK interrupt */
+	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690) {
+		if (r500_disp_int & R500_D1_VBLANK_INTERRUPT)
+			drm_handle_vblank(dev, 0);
+		if (r500_disp_int & R500_D2_VBLANK_INTERRUPT)
+			drm_handle_vblank(dev, 1);
+	} else {
+		if (stat & RADEON_CRTC_VBLANK_STAT)
+			drm_handle_vblank(dev, 0);
+		if (stat & RADEON_CRTC2_VBLANK_STAT)
+			drm_handle_vblank(dev, 1);
+	}
+	return IRQ_HANDLED;
+}
+
+static int radeon_emit_irq(struct drm_device * dev)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	unsigned int ret;
+	RING_LOCALS;
+
+	atomic_inc(&dev_priv->swi_emitted);
+	ret = atomic_read(&dev_priv->swi_emitted);
+
+	BEGIN_RING(4);
+	OUT_RING_REG(RADEON_LAST_SWI_REG, ret);
+	OUT_RING_REG(RADEON_GEN_INT_STATUS, RADEON_SW_INT_FIRE);
+	ADVANCE_RING();
+	COMMIT_RING();
+
+	return ret;
+}
+
+static int radeon_wait_irq(struct drm_device * dev, int swi_nr)
+{
+	drm_radeon_private_t *dev_priv =
+	    (drm_radeon_private_t *) dev->dev_private;
+	int ret = 0;
+
+	if (RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr)
+		return 0;
+
+	dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
+
+	DRM_WAIT_ON(ret, dev_priv->swi_queue, 3 * DRM_HZ,
+		    RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr);
+
+	return ret;
+}
+
+u32 radeon_get_vblank_counter(struct drm_device *dev, int crtc)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+
+	if (!dev_priv) {
+		DRM_ERROR("called with no initialization\n");
+		return -EINVAL;
+	}
+
+	if (crtc < 0 || crtc > 1) {
+		DRM_ERROR("Invalid crtc %d\n", crtc);
+		return -EINVAL;
+	}
+
+	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690) {
+		if (crtc == 0)
+			return RADEON_READ(R500_D1CRTC_FRAME_COUNT);
+		else
+			return RADEON_READ(R500_D2CRTC_FRAME_COUNT);
+	} else {
+		if (crtc == 0)
+			return RADEON_READ(RADEON_CRTC_CRNT_FRAME);
+		else
+			return RADEON_READ(RADEON_CRTC2_CRNT_FRAME);
+	}
+}
+
+/* Needs the lock as it touches the ring.
+ */
+int radeon_irq_emit(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	drm_radeon_irq_emit_t *emit = data;
+	int result;
+
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
+
+	if (!dev_priv) {
+		DRM_ERROR("called with no initialization\n");
+		return -EINVAL;
+	}
+
+	result = radeon_emit_irq(dev);
+
+	if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
+		DRM_ERROR("copy_to_user\n");
+		return -EFAULT;
+	}
+
+	return 0;
+}
+
+/* Doesn't need the hardware lock.
+ */
+int radeon_irq_wait(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	drm_radeon_irq_wait_t *irqwait = data;
+
+	if (!dev_priv) {
+		DRM_ERROR("called with no initialization\n");
+		return -EINVAL;
+	}
+
+	return radeon_wait_irq(dev, irqwait->irq_seq);
+}
+
+/* drm_dma.h hooks
+*/
+void radeon_driver_irq_preinstall(struct drm_device * dev)
+{
+	drm_radeon_private_t *dev_priv =
+	    (drm_radeon_private_t *) dev->dev_private;
+	u32 dummy;
+
+	/* Disable *all* interrupts */
+	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
+		RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
+	RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
+
+	/* Clear bits if they're already high */
+	radeon_acknowledge_irqs(dev_priv, &dummy);
+}
+
+int radeon_driver_irq_postinstall(struct drm_device *dev)
+{
+	drm_radeon_private_t *dev_priv =
+	    (drm_radeon_private_t *) dev->dev_private;
+
+	atomic_set(&dev_priv->swi_emitted, 0);
+	DRM_INIT_WAITQUEUE(&dev_priv->swi_queue);
+
+	dev->max_vblank_count = 0x001fffff;
+
+	radeon_irq_set_state(dev, RADEON_SW_INT_ENABLE, 1);
+
+	return 0;
+}
+
+void radeon_driver_irq_uninstall(struct drm_device * dev)
+{
+	drm_radeon_private_t *dev_priv =
+	    (drm_radeon_private_t *) dev->dev_private;
+	if (!dev_priv)
+		return;
+
+	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
+		RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
+	/* Disable *all* interrupts */
+	RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
+}
+
+
+int radeon_vblank_crtc_get(struct drm_device *dev)
+{
+	drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;
+
+	return dev_priv->vblank_crtc;
+}
+
+int radeon_vblank_crtc_set(struct drm_device *dev, int64_t value)
+{
+	drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;
+	if (value & ~(DRM_RADEON_VBLANK_CRTC1 | DRM_RADEON_VBLANK_CRTC2)) {
+		DRM_ERROR("called with invalid crtc 0x%x\n", (unsigned int)value);
+		return -EINVAL;
+	}
+	dev_priv->vblank_crtc = (unsigned int)value;
+	return 0;
+}