diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/radeon/radeon_irq.c')
| -rw-r--r-- | kernel/drivers/gpu/drm/radeon/radeon_irq.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/radeon/radeon_irq.c b/kernel/drivers/gpu/drm/radeon/radeon_irq.c new file mode 100644 index 000000000..244b19bab --- /dev/null +++ b/kernel/drivers/gpu/drm/radeon/radeon_irq.c @@ -0,0 +1,402 @@ +/* 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> + * + * ------------------------ This file is DEPRECATED! ------------------------- + */ + +#include <drm/drmP.h> +#include <drm/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_RS600) { + 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_RS600) { + 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 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_RS600) { + /* 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(int irq, void *arg) +{ + 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; + + if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600) + return IRQ_NONE; + + /* 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) + wake_up(&dev_priv->swi_queue); + + /* VBLANK interrupt */ + if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) { + 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 * 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_RS600) { + 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; + + if (!dev_priv) { + DRM_ERROR("called with no initialization\n"); + return -EINVAL; + } + + if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600) + return -EINVAL; + + LOCK_TEST_WITH_RETURN(dev, file_priv); + + result = radeon_emit_irq(dev); + + if (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; + } + + if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600) + 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; + + if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600) + return; + + /* Disable *all* interrupts */ + if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) + 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); + init_waitqueue_head(&dev_priv->swi_queue); + + dev->max_vblank_count = 0x001fffff; + + if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600) + return 0; + + 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_R600) + return; + + if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) + 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; +} |