diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_irq.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_irq.c | 320 |
1 files changed, 320 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 00000000000..ee40d197deb --- /dev/null +++ b/drivers/gpu/drm/radeon/radeon_irq.c @@ -0,0 +1,320 @@ +/* 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 Dänzer <michel@daenzer.net> + */ + +#include "drmP.h" +#include "drm.h" +#include "radeon_drm.h" +#include "radeon_drv.h" + +static __inline__ u32 radeon_acknowledge_irqs(drm_radeon_private_t * dev_priv, + u32 mask) +{ + u32 irqs = RADEON_READ(RADEON_GEN_INT_STATUS) & 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; + + /* Only consider the bits we're interested in - others could be used + * outside the DRM + */ + stat = radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK | + RADEON_CRTC_VBLANK_STAT | + RADEON_CRTC2_VBLANK_STAT)); + 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 (stat & (RADEON_CRTC_VBLANK_STAT|RADEON_CRTC2_VBLANK_STAT)) { + int vblank_crtc = dev_priv->vblank_crtc; + + if ((vblank_crtc & + (DRM_RADEON_VBLANK_CRTC1 | DRM_RADEON_VBLANK_CRTC2)) == + (DRM_RADEON_VBLANK_CRTC1 | DRM_RADEON_VBLANK_CRTC2)) { + if (stat & RADEON_CRTC_VBLANK_STAT) + atomic_inc(&dev->vbl_received); + if (stat & RADEON_CRTC2_VBLANK_STAT) + atomic_inc(&dev->vbl_received2); + } else if (((stat & RADEON_CRTC_VBLANK_STAT) && + (vblank_crtc & DRM_RADEON_VBLANK_CRTC1)) || + ((stat & RADEON_CRTC2_VBLANK_STAT) && + (vblank_crtc & DRM_RADEON_VBLANK_CRTC2))) + atomic_inc(&dev->vbl_received); + + DRM_WAKEUP(&dev->vbl_queue); + drm_vbl_send_signals(dev); + } + + 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; +} + +static int radeon_driver_vblank_do_wait(struct drm_device * dev, + unsigned int *sequence, int crtc) +{ + drm_radeon_private_t *dev_priv = + (drm_radeon_private_t *) dev->dev_private; + unsigned int cur_vblank; + int ret = 0; + int ack = 0; + atomic_t *counter; + if (!dev_priv) { + DRM_ERROR("called with no initialization\n"); + return -EINVAL; + } + + if (crtc == DRM_RADEON_VBLANK_CRTC1) { + counter = &dev->vbl_received; + ack |= RADEON_CRTC_VBLANK_STAT; + } else if (crtc == DRM_RADEON_VBLANK_CRTC2) { + counter = &dev->vbl_received2; + ack |= RADEON_CRTC2_VBLANK_STAT; + } else + return -EINVAL; + + radeon_acknowledge_irqs(dev_priv, ack); + + dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE; + + /* Assume that the user has missed the current sequence number + * by about a day rather than she wants to wait for years + * using vertical blanks... + */ + DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, + (((cur_vblank = atomic_read(counter)) + - *sequence) <= (1 << 23))); + + *sequence = cur_vblank; + + return ret; +} + +int radeon_driver_vblank_wait(struct drm_device *dev, unsigned int *sequence) +{ + return radeon_driver_vblank_do_wait(dev, sequence, DRM_RADEON_VBLANK_CRTC1); +} + +int radeon_driver_vblank_wait2(struct drm_device *dev, unsigned int *sequence) +{ + return radeon_driver_vblank_do_wait(dev, sequence, DRM_RADEON_VBLANK_CRTC2); +} + +/* 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); +} + +void radeon_enable_interrupt(struct drm_device *dev) +{ + drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private; + + dev_priv->irq_enable_reg = RADEON_SW_INT_ENABLE; + if (dev_priv->vblank_crtc & DRM_RADEON_VBLANK_CRTC1) + dev_priv->irq_enable_reg |= RADEON_CRTC_VBLANK_MASK; + + if (dev_priv->vblank_crtc & DRM_RADEON_VBLANK_CRTC2) + dev_priv->irq_enable_reg |= RADEON_CRTC2_VBLANK_MASK; + + RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg); + dev_priv->irq_enabled = 1; +} + +/* 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; + + /* Disable *all* interrupts */ + RADEON_WRITE(RADEON_GEN_INT_CNTL, 0); + + /* Clear bits if they're already high */ + radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK | + RADEON_CRTC_VBLANK_STAT | + RADEON_CRTC2_VBLANK_STAT)); +} + +void 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); + + radeon_enable_interrupt(dev); +} + +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; + + dev_priv->irq_enabled = 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; + u32 flag; + u32 value; + + flag = RADEON_READ(RADEON_GEN_INT_CNTL); + value = 0; + + if (flag & RADEON_CRTC_VBLANK_MASK) + value |= DRM_RADEON_VBLANK_CRTC1; + + if (flag & RADEON_CRTC2_VBLANK_MASK) + value |= DRM_RADEON_VBLANK_CRTC2; + return value; +} + +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; + radeon_enable_interrupt(dev); + return 0; +} |