Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 1 | /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | */ |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 3 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. |
| 5 | * All Rights Reserved. |
Dave Airlie | bc54fd1 | 2005-06-23 22:46:46 +1000 | [diff] [blame] | 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 8 | * copy of this software and associated documentation files (the |
| 9 | * "Software"), to deal in the Software without restriction, including |
| 10 | * without limitation the rights to use, copy, modify, merge, publish, |
| 11 | * distribute, sub license, and/or sell copies of the Software, and to |
| 12 | * permit persons to whom the Software is furnished to do so, subject to |
| 13 | * the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice (including the |
| 16 | * next paragraph) shall be included in all copies or substantial portions |
| 17 | * of the Software. |
| 18 | * |
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 21 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| 22 | * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
| 23 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 24 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 25 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 26 | * |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 27 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include "drmP.h" |
| 30 | #include "drm.h" |
| 31 | #include "i915_drm.h" |
| 32 | #include "i915_drv.h" |
| 33 | |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 34 | #define USER_INT_FLAG (1<<1) |
| 35 | #define VSYNC_PIPEB_FLAG (1<<5) |
| 36 | #define VSYNC_PIPEA_FLAG (1<<7) |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #define MAX_NOPID ((u32)~0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) |
| 41 | { |
| 42 | drm_device_t *dev = (drm_device_t *) arg; |
| 43 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| 44 | u16 temp; |
| 45 | |
| 46 | temp = I915_READ16(I915REG_INT_IDENTITY_R); |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 47 | temp &= (USER_INT_FLAG | VSYNC_PIPEA_FLAG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | DRM_DEBUG("%s flag=%08x\n", __FUNCTION__, temp); |
| 50 | |
| 51 | if (temp == 0) |
| 52 | return IRQ_NONE; |
| 53 | |
| 54 | I915_WRITE16(I915REG_INT_IDENTITY_R, temp); |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 55 | |
| 56 | if (temp & USER_INT_FLAG) |
| 57 | DRM_WAKEUP(&dev_priv->irq_queue); |
| 58 | |
| 59 | if (temp & VSYNC_PIPEA_FLAG) { |
| 60 | atomic_inc(&dev->vbl_received); |
| 61 | DRM_WAKEUP(&dev->vbl_queue); |
| 62 | drm_vbl_send_signals(dev); |
| 63 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
| 65 | return IRQ_HANDLED; |
| 66 | } |
| 67 | |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 68 | static int i915_emit_irq(drm_device_t * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | { |
| 70 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 71 | u32 ret; |
| 72 | RING_LOCALS; |
| 73 | |
| 74 | i915_kernel_lost_context(dev); |
| 75 | |
| 76 | DRM_DEBUG("%s\n", __FUNCTION__); |
| 77 | |
| 78 | ret = dev_priv->counter; |
| 79 | |
| 80 | BEGIN_LP_RING(2); |
| 81 | OUT_RING(0); |
| 82 | OUT_RING(GFX_OP_USER_INTERRUPT); |
| 83 | ADVANCE_LP_RING(); |
| 84 | |
| 85 | return ret; |
| 86 | } |
| 87 | |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 88 | static int i915_wait_irq(drm_device_t * dev, int irq_nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | { |
| 90 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| 91 | int ret = 0; |
| 92 | |
| 93 | DRM_DEBUG("%s irq_nr=%d breadcrumb=%d\n", __FUNCTION__, irq_nr, |
| 94 | READ_BREADCRUMB(dev_priv)); |
| 95 | |
| 96 | if (READ_BREADCRUMB(dev_priv) >= irq_nr) |
| 97 | return 0; |
| 98 | |
| 99 | dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; |
| 100 | |
| 101 | DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ, |
| 102 | READ_BREADCRUMB(dev_priv) >= irq_nr); |
| 103 | |
| 104 | if (ret == DRM_ERR(EBUSY)) { |
| 105 | DRM_ERROR("%s: EBUSY -- rec: %d emitted: %d\n", |
| 106 | __FUNCTION__, |
| 107 | READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); |
| 108 | } |
| 109 | |
| 110 | dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); |
| 111 | return ret; |
| 112 | } |
| 113 | |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 114 | int i915_driver_vblank_wait(drm_device_t *dev, unsigned int *sequence) |
| 115 | { |
| 116 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 117 | unsigned int cur_vblank; |
| 118 | int ret = 0; |
| 119 | |
| 120 | if (!dev_priv) { |
| 121 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 122 | return DRM_ERR(EINVAL); |
| 123 | } |
| 124 | |
| 125 | DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, |
| 126 | (((cur_vblank = atomic_read(&dev->vbl_received)) |
| 127 | - *sequence) <= (1<<23))); |
| 128 | |
| 129 | *sequence = cur_vblank; |
| 130 | |
| 131 | return ret; |
| 132 | } |
| 133 | |
| 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | /* Needs the lock as it touches the ring. |
| 136 | */ |
| 137 | int i915_irq_emit(DRM_IOCTL_ARGS) |
| 138 | { |
| 139 | DRM_DEVICE; |
| 140 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 141 | drm_i915_irq_emit_t emit; |
| 142 | int result; |
| 143 | |
| 144 | LOCK_TEST_WITH_RETURN(dev, filp); |
| 145 | |
| 146 | if (!dev_priv) { |
| 147 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 148 | return DRM_ERR(EINVAL); |
| 149 | } |
| 150 | |
| 151 | DRM_COPY_FROM_USER_IOCTL(emit, (drm_i915_irq_emit_t __user *) data, |
| 152 | sizeof(emit)); |
| 153 | |
| 154 | result = i915_emit_irq(dev); |
| 155 | |
| 156 | if (DRM_COPY_TO_USER(emit.irq_seq, &result, sizeof(int))) { |
| 157 | DRM_ERROR("copy_to_user\n"); |
| 158 | return DRM_ERR(EFAULT); |
| 159 | } |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | /* Doesn't need the hardware lock. |
| 165 | */ |
| 166 | int i915_irq_wait(DRM_IOCTL_ARGS) |
| 167 | { |
| 168 | DRM_DEVICE; |
| 169 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 170 | drm_i915_irq_wait_t irqwait; |
| 171 | |
| 172 | if (!dev_priv) { |
| 173 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 174 | return DRM_ERR(EINVAL); |
| 175 | } |
| 176 | |
| 177 | DRM_COPY_FROM_USER_IOCTL(irqwait, (drm_i915_irq_wait_t __user *) data, |
| 178 | sizeof(irqwait)); |
| 179 | |
| 180 | return i915_wait_irq(dev, irqwait.irq_seq); |
| 181 | } |
| 182 | |
| 183 | /* drm_dma.h hooks |
| 184 | */ |
| 185 | void i915_driver_irq_preinstall(drm_device_t * dev) |
| 186 | { |
| 187 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| 188 | |
| 189 | I915_WRITE16(I915REG_HWSTAM, 0xfffe); |
| 190 | I915_WRITE16(I915REG_INT_MASK_R, 0x0); |
| 191 | I915_WRITE16(I915REG_INT_ENABLE_R, 0x0); |
| 192 | } |
| 193 | |
| 194 | void i915_driver_irq_postinstall(drm_device_t * dev) |
| 195 | { |
| 196 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| 197 | |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 198 | I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | VSYNC_PIPEA_FLAG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | DRM_INIT_WAITQUEUE(&dev_priv->irq_queue); |
| 200 | } |
| 201 | |
| 202 | void i915_driver_irq_uninstall(drm_device_t * dev) |
| 203 | { |
| 204 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
Dave Airlie | 91e3738 | 2006-02-18 15:17:04 +1100 | [diff] [blame^] | 205 | u16 temp; |
| 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | if (!dev_priv) |
| 208 | return; |
| 209 | |
| 210 | I915_WRITE16(I915REG_HWSTAM, 0xffff); |
| 211 | I915_WRITE16(I915REG_INT_MASK_R, 0xffff); |
| 212 | I915_WRITE16(I915REG_INT_ENABLE_R, 0x0); |
Dave Airlie | 91e3738 | 2006-02-18 15:17:04 +1100 | [diff] [blame^] | 213 | |
| 214 | temp = I915_READ16(I915REG_INT_IDENTITY_R); |
| 215 | I915_WRITE16(I915REG_INT_IDENTITY_R, temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |