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 | 702880f | 2006-06-24 17:07:34 +1000 | [diff] [blame] | 47 | |
| 48 | temp &= (USER_INT_FLAG | VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | DRM_DEBUG("%s flag=%08x\n", __FUNCTION__, temp); |
| 51 | |
| 52 | if (temp == 0) |
| 53 | return IRQ_NONE; |
| 54 | |
| 55 | I915_WRITE16(I915REG_INT_IDENTITY_R, temp); |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 56 | |
Dave Airlie | 6e5fca5 | 2006-03-20 18:34:29 +1100 | [diff] [blame] | 57 | dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); |
| 58 | |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 59 | if (temp & USER_INT_FLAG) |
| 60 | DRM_WAKEUP(&dev_priv->irq_queue); |
| 61 | |
Dave Airlie | 702880f | 2006-06-24 17:07:34 +1000 | [diff] [blame] | 62 | if (temp & (VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG)) { |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 63 | atomic_inc(&dev->vbl_received); |
| 64 | DRM_WAKEUP(&dev->vbl_queue); |
| 65 | drm_vbl_send_signals(dev); |
| 66 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
| 68 | return IRQ_HANDLED; |
| 69 | } |
| 70 | |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 71 | static int i915_emit_irq(drm_device_t * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
| 73 | drm_i915_private_t *dev_priv = dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | RING_LOCALS; |
| 75 | |
| 76 | i915_kernel_lost_context(dev); |
| 77 | |
| 78 | DRM_DEBUG("%s\n", __FUNCTION__); |
| 79 | |
Alan Hourihane | c29b669 | 2006-08-12 16:29:24 +1000 | [diff] [blame^] | 80 | dev_priv->sarea_priv->last_enqueue = ++dev_priv->counter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Alan Hourihane | c29b669 | 2006-08-12 16:29:24 +1000 | [diff] [blame^] | 82 | if (dev_priv->counter > 0x7FFFFFFFUL) |
| 83 | dev_priv->sarea_priv->last_enqueue = dev_priv->counter = 1; |
| 84 | |
| 85 | BEGIN_LP_RING(6); |
| 86 | OUT_RING(CMD_STORE_DWORD_IDX); |
| 87 | OUT_RING(20); |
| 88 | OUT_RING(dev_priv->counter); |
| 89 | OUT_RING(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | OUT_RING(0); |
| 91 | OUT_RING(GFX_OP_USER_INTERRUPT); |
| 92 | ADVANCE_LP_RING(); |
Alan Hourihane | c29b669 | 2006-08-12 16:29:24 +1000 | [diff] [blame^] | 93 | |
| 94 | return dev_priv->counter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 97 | static int i915_wait_irq(drm_device_t * dev, int irq_nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | { |
| 99 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| 100 | int ret = 0; |
| 101 | |
| 102 | DRM_DEBUG("%s irq_nr=%d breadcrumb=%d\n", __FUNCTION__, irq_nr, |
| 103 | READ_BREADCRUMB(dev_priv)); |
| 104 | |
| 105 | if (READ_BREADCRUMB(dev_priv) >= irq_nr) |
| 106 | return 0; |
| 107 | |
| 108 | dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; |
| 109 | |
| 110 | DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ, |
| 111 | READ_BREADCRUMB(dev_priv) >= irq_nr); |
| 112 | |
| 113 | if (ret == DRM_ERR(EBUSY)) { |
| 114 | DRM_ERROR("%s: EBUSY -- rec: %d emitted: %d\n", |
| 115 | __FUNCTION__, |
| 116 | READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); |
| 117 | } |
| 118 | |
| 119 | dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); |
| 120 | return ret; |
| 121 | } |
| 122 | |
Dave Airlie | 0d6aa60 | 2006-01-02 20:14:23 +1100 | [diff] [blame] | 123 | int i915_driver_vblank_wait(drm_device_t *dev, unsigned int *sequence) |
| 124 | { |
| 125 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 126 | unsigned int cur_vblank; |
| 127 | int ret = 0; |
| 128 | |
| 129 | if (!dev_priv) { |
| 130 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 131 | return DRM_ERR(EINVAL); |
| 132 | } |
| 133 | |
| 134 | DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, |
| 135 | (((cur_vblank = atomic_read(&dev->vbl_received)) |
| 136 | - *sequence) <= (1<<23))); |
| 137 | |
| 138 | *sequence = cur_vblank; |
| 139 | |
| 140 | return ret; |
| 141 | } |
| 142 | |
| 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | /* Needs the lock as it touches the ring. |
| 145 | */ |
| 146 | int i915_irq_emit(DRM_IOCTL_ARGS) |
| 147 | { |
| 148 | DRM_DEVICE; |
| 149 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 150 | drm_i915_irq_emit_t emit; |
| 151 | int result; |
| 152 | |
| 153 | LOCK_TEST_WITH_RETURN(dev, filp); |
| 154 | |
| 155 | if (!dev_priv) { |
| 156 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 157 | return DRM_ERR(EINVAL); |
| 158 | } |
| 159 | |
| 160 | DRM_COPY_FROM_USER_IOCTL(emit, (drm_i915_irq_emit_t __user *) data, |
| 161 | sizeof(emit)); |
| 162 | |
| 163 | result = i915_emit_irq(dev); |
| 164 | |
| 165 | if (DRM_COPY_TO_USER(emit.irq_seq, &result, sizeof(int))) { |
| 166 | DRM_ERROR("copy_to_user\n"); |
| 167 | return DRM_ERR(EFAULT); |
| 168 | } |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | /* Doesn't need the hardware lock. |
| 174 | */ |
| 175 | int i915_irq_wait(DRM_IOCTL_ARGS) |
| 176 | { |
| 177 | DRM_DEVICE; |
| 178 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 179 | drm_i915_irq_wait_t irqwait; |
| 180 | |
| 181 | if (!dev_priv) { |
| 182 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 183 | return DRM_ERR(EINVAL); |
| 184 | } |
| 185 | |
| 186 | DRM_COPY_FROM_USER_IOCTL(irqwait, (drm_i915_irq_wait_t __user *) data, |
| 187 | sizeof(irqwait)); |
| 188 | |
| 189 | return i915_wait_irq(dev, irqwait.irq_seq); |
| 190 | } |
| 191 | |
Dave Airlie | 702880f | 2006-06-24 17:07:34 +1000 | [diff] [blame] | 192 | static int i915_enable_interrupt (drm_device_t *dev) |
| 193 | { |
| 194 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| 195 | u16 flag; |
| 196 | |
| 197 | flag = 0; |
| 198 | if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_A) |
| 199 | flag |= VSYNC_PIPEA_FLAG; |
| 200 | if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_B) |
| 201 | flag |= VSYNC_PIPEB_FLAG; |
| 202 | if (dev_priv->vblank_pipe & ~(DRM_I915_VBLANK_PIPE_A|DRM_I915_VBLANK_PIPE_B)) { |
| 203 | DRM_ERROR("%s called with invalid pipe 0x%x\n", |
| 204 | __FUNCTION__, dev_priv->vblank_pipe); |
| 205 | return DRM_ERR(EINVAL); |
| 206 | } |
| 207 | I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | flag); |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | /* Set the vblank monitor pipe |
| 212 | */ |
| 213 | int i915_vblank_pipe_set(DRM_IOCTL_ARGS) |
| 214 | { |
| 215 | DRM_DEVICE; |
| 216 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 217 | drm_i915_vblank_pipe_t pipe; |
| 218 | |
| 219 | if (!dev_priv) { |
| 220 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 221 | return DRM_ERR(EINVAL); |
| 222 | } |
| 223 | |
| 224 | DRM_COPY_FROM_USER_IOCTL(pipe, (drm_i915_vblank_pipe_t __user *) data, |
| 225 | sizeof(pipe)); |
| 226 | |
| 227 | dev_priv->vblank_pipe = pipe.pipe; |
| 228 | return i915_enable_interrupt (dev); |
| 229 | } |
| 230 | |
| 231 | int i915_vblank_pipe_get(DRM_IOCTL_ARGS) |
| 232 | { |
| 233 | DRM_DEVICE; |
| 234 | drm_i915_private_t *dev_priv = dev->dev_private; |
| 235 | drm_i915_vblank_pipe_t pipe; |
| 236 | u16 flag; |
| 237 | |
| 238 | if (!dev_priv) { |
| 239 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 240 | return DRM_ERR(EINVAL); |
| 241 | } |
| 242 | |
| 243 | flag = I915_READ(I915REG_INT_ENABLE_R); |
| 244 | pipe.pipe = 0; |
| 245 | if (flag & VSYNC_PIPEA_FLAG) |
| 246 | pipe.pipe |= DRM_I915_VBLANK_PIPE_A; |
| 247 | if (flag & VSYNC_PIPEB_FLAG) |
| 248 | pipe.pipe |= DRM_I915_VBLANK_PIPE_B; |
| 249 | DRM_COPY_TO_USER_IOCTL((drm_i915_vblank_pipe_t __user *) data, pipe, |
| 250 | sizeof(pipe)); |
| 251 | return 0; |
| 252 | } |
| 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | /* drm_dma.h hooks |
| 255 | */ |
| 256 | void i915_driver_irq_preinstall(drm_device_t * dev) |
| 257 | { |
| 258 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| 259 | |
| 260 | I915_WRITE16(I915REG_HWSTAM, 0xfffe); |
| 261 | I915_WRITE16(I915REG_INT_MASK_R, 0x0); |
| 262 | I915_WRITE16(I915REG_INT_ENABLE_R, 0x0); |
| 263 | } |
| 264 | |
| 265 | void i915_driver_irq_postinstall(drm_device_t * dev) |
| 266 | { |
| 267 | drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; |
| 268 | |
Dave Airlie | 702880f | 2006-06-24 17:07:34 +1000 | [diff] [blame] | 269 | i915_enable_interrupt(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | DRM_INIT_WAITQUEUE(&dev_priv->irq_queue); |
| 271 | } |
| 272 | |
| 273 | void i915_driver_irq_uninstall(drm_device_t * dev) |
| 274 | { |
| 275 | 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] | 276 | u16 temp; |
| 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | if (!dev_priv) |
| 279 | return; |
| 280 | |
| 281 | I915_WRITE16(I915REG_HWSTAM, 0xffff); |
| 282 | I915_WRITE16(I915REG_INT_MASK_R, 0xffff); |
| 283 | I915_WRITE16(I915REG_INT_ENABLE_R, 0x0); |
Dave Airlie | 91e3738 | 2006-02-18 15:17:04 +1100 | [diff] [blame] | 284 | |
| 285 | temp = I915_READ16(I915REG_INT_IDENTITY_R); |
| 286 | I915_WRITE16(I915REG_INT_IDENTITY_R, temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |