xref: /dragonfly/sys/dev/drm/i915/i915_drv.h (revision 25a2db75)
1 /* i915_drv.h -- Private header for the I915 driver -*- linux-c -*-
2  */
3 /*
4  *
5  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
6  * All Rights Reserved.
7  *
8  * Permission is hereby granted, free of charge, to any person obtaining a
9  * copy of this software and associated documentation files (the
10  * "Software"), to deal in the Software without restriction, including
11  * without limitation the rights to use, copy, modify, merge, publish,
12  * distribute, sub license, and/or sell copies of the Software, and to
13  * permit persons to whom the Software is furnished to do so, subject to
14  * the following conditions:
15  *
16  * The above copyright notice and this permission notice (including the
17  * next paragraph) shall be included in all copies or substantial portions
18  * of the Software.
19  *
20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
23  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27  *
28  */
29 
30 #ifndef _I915_DRV_H_
31 #define _I915_DRV_H_
32 
33 #include "dev/drm/drm_mm.h"
34 #include "i915_reg.h"
35 
36 /* General customization:
37  */
38 
39 #define DRIVER_AUTHOR		"Tungsten Graphics, Inc."
40 
41 #define DRIVER_NAME		"i915"
42 #define DRIVER_DESC		"Intel Graphics"
43 #define DRIVER_DATE		"20080730"
44 
45 enum i915_pipe {
46 	PIPE_A = 0,
47 	PIPE_B,
48 };
49 
50 #define I915_NUM_PIPE	2
51 
52 /* Interface history:
53  *
54  * 1.1: Original.
55  * 1.2: Add Power Management
56  * 1.3: Add vblank support
57  * 1.4: Fix cmdbuffer path, add heap destroy
58  * 1.5: Add vblank pipe configuration
59  * 1.6: - New ioctl for scheduling buffer swaps on vertical blank
60  *      - Support vertical blank on secondary display pipe
61  */
62 #define DRIVER_MAJOR		1
63 #define DRIVER_MINOR		6
64 #define DRIVER_PATCHLEVEL	0
65 
66 #define WATCH_COHERENCY	0
67 #define WATCH_BUF	0
68 #define WATCH_EXEC	0
69 #define WATCH_LRU	0
70 #define WATCH_RELOC	0
71 #define WATCH_INACTIVE	0
72 #define WATCH_PWRITE	0
73 
74 typedef struct _drm_i915_ring_buffer {
75 	int tail_mask;
76 	unsigned long Size;
77 	u8 *virtual_start;
78 	int head;
79 	int tail;
80 	int space;
81 	drm_local_map_t map;
82 	struct drm_gem_object *ring_obj;
83 } drm_i915_ring_buffer_t;
84 
85 struct mem_block {
86 	struct mem_block *next;
87 	struct mem_block *prev;
88 	int start;
89 	int size;
90 	struct drm_file *file_priv; /* NULL: free, -1: heap, other: real files */
91 };
92 
93 struct opregion_header;
94 struct opregion_acpi;
95 struct opregion_swsci;
96 struct opregion_asle;
97 
98 struct intel_opregion {
99 	struct opregion_header *header;
100 	struct opregion_acpi *acpi;
101 	struct opregion_swsci *swsci;
102 	struct opregion_asle *asle;
103 	int enabled;
104 };
105 
106 typedef struct drm_i915_private {
107 	struct drm_device *dev;
108 
109 	drm_local_map_t *sarea;
110 	drm_local_map_t *mmio_map;
111 
112 	drm_i915_sarea_t *sarea_priv;
113 	drm_i915_ring_buffer_t ring;
114 
115 	drm_dma_handle_t *status_page_dmah;
116 	void *hw_status_page;
117 	dma_addr_t dma_status_page;
118 	uint32_t counter;
119 	unsigned int status_gfx_addr;
120 	drm_local_map_t hws_map;
121 	struct drm_gem_object *hws_obj;
122 
123 	unsigned int cpp;
124 	int back_offset;
125 	int front_offset;
126 	int current_page;
127 	int page_flipping;
128 
129 	wait_queue_head_t irq_queue;
130 	/** Protects user_irq_refcount and irq_mask_reg */
131 	DRM_SPINTYPE user_irq_lock;
132 	/** Refcount for i915_user_irq_get() versus i915_user_irq_put(). */
133 	int user_irq_refcount;
134 	/** Cached value of IER to avoid reads in updating the bitfield */
135 	u32 irq_mask_reg;
136 	u32 pipestat[2];
137 
138 	int tex_lru_log_granularity;
139 	int allow_batchbuffer;
140 	struct mem_block *agp_heap;
141 	unsigned int sr01, adpa, ppcr, dvob, dvoc, lvds;
142 	int vblank_pipe;
143 
144 	struct intel_opregion opregion;
145 
146 	/* Register state */
147 	u8 saveLBB;
148 	u32 saveDSPACNTR;
149 	u32 saveDSPBCNTR;
150 	u32 saveDSPARB;
151 	u32 saveRENDERSTANDBY;
152 	u32 saveHWS;
153 	u32 savePIPEACONF;
154 	u32 savePIPEBCONF;
155 	u32 savePIPEASRC;
156 	u32 savePIPEBSRC;
157 	u32 saveFPA0;
158 	u32 saveFPA1;
159 	u32 saveDPLL_A;
160 	u32 saveDPLL_A_MD;
161 	u32 saveHTOTAL_A;
162 	u32 saveHBLANK_A;
163 	u32 saveHSYNC_A;
164 	u32 saveVTOTAL_A;
165 	u32 saveVBLANK_A;
166 	u32 saveVSYNC_A;
167 	u32 saveBCLRPAT_A;
168 	u32 savePIPEASTAT;
169 	u32 saveDSPASTRIDE;
170 	u32 saveDSPASIZE;
171 	u32 saveDSPAPOS;
172 	u32 saveDSPAADDR;
173 	u32 saveDSPASURF;
174 	u32 saveDSPATILEOFF;
175 	u32 savePFIT_PGM_RATIOS;
176 	u32 saveBLC_PWM_CTL;
177 	u32 saveBLC_PWM_CTL2;
178 	u32 saveFPB0;
179 	u32 saveFPB1;
180 	u32 saveDPLL_B;
181 	u32 saveDPLL_B_MD;
182 	u32 saveHTOTAL_B;
183 	u32 saveHBLANK_B;
184 	u32 saveHSYNC_B;
185 	u32 saveVTOTAL_B;
186 	u32 saveVBLANK_B;
187 	u32 saveVSYNC_B;
188 	u32 saveBCLRPAT_B;
189 	u32 savePIPEBSTAT;
190 	u32 saveDSPBSTRIDE;
191 	u32 saveDSPBSIZE;
192 	u32 saveDSPBPOS;
193 	u32 saveDSPBADDR;
194 	u32 saveDSPBSURF;
195 	u32 saveDSPBTILEOFF;
196 	u32 saveVGA0;
197 	u32 saveVGA1;
198 	u32 saveVGA_PD;
199 	u32 saveVGACNTRL;
200 	u32 saveADPA;
201 	u32 saveLVDS;
202 	u32 savePP_ON_DELAYS;
203 	u32 savePP_OFF_DELAYS;
204 	u32 saveDVOA;
205 	u32 saveDVOB;
206 	u32 saveDVOC;
207 	u32 savePP_ON;
208 	u32 savePP_OFF;
209 	u32 savePP_CONTROL;
210 	u32 savePP_DIVISOR;
211 	u32 savePFIT_CONTROL;
212 	u32 save_palette_a[256];
213 	u32 save_palette_b[256];
214 	u32 saveFBC_CFB_BASE;
215 	u32 saveFBC_LL_BASE;
216 	u32 saveFBC_CONTROL;
217 	u32 saveFBC_CONTROL2;
218 	u32 saveIER;
219 	u32 saveIIR;
220 	u32 saveIMR;
221 	u32 saveCACHE_MODE_0;
222 	u32 saveD_STATE;
223 	u32 saveCG_2D_DIS;
224 	u32 saveMI_ARB_STATE;
225 	u32 saveSWF0[16];
226 	u32 saveSWF1[16];
227 	u32 saveSWF2[3];
228 	u8 saveMSR;
229 	u8 saveSR[8];
230 	u8 saveGR[25];
231 	u8 saveAR_INDEX;
232 	u8 saveAR[21];
233 	u8 saveDACMASK;
234 	u8 saveCR[37];
235 
236 	struct {
237 #ifdef __linux__
238 		struct drm_mm gtt_space;
239 #endif
240 		/**
241 		 * List of objects currently involved in rendering from the
242 		 * ringbuffer.
243 		 *
244 		 * A reference is held on the buffer while on this list.
245 		 */
246 		struct list_head active_list;
247 
248 		/**
249 		 * List of objects which are not in the ringbuffer but which
250 		 * still have a write_domain which needs to be flushed before
251 		 * unbinding.
252 		 *
253 		 * A reference is held on the buffer while on this list.
254 		 */
255 		struct list_head flushing_list;
256 
257 		/**
258 		 * LRU list of objects which are not in the ringbuffer and
259 		 * are ready to unbind, but are still in the GTT.
260 		 *
261 		 * A reference is not held on the buffer while on this list,
262 		 * as merely being GTT-bound shouldn't prevent its being
263 		 * freed, and we'll pull it off the list in the free path.
264 		 */
265 		struct list_head inactive_list;
266 
267 		/**
268 		 * List of breadcrumbs associated with GPU requests currently
269 		 * outstanding.
270 		 */
271 		struct list_head request_list;
272 #ifdef __linux__
273 		/**
274 		 * We leave the user IRQ off as much as possible,
275 		 * but this means that requests will finish and never
276 		 * be retired once the system goes idle. Set a timer to
277 		 * fire periodically while the ring is running. When it
278 		 * fires, go retire requests.
279 		 */
280 		struct delayed_work retire_work;
281 #endif
282 		uint32_t next_gem_seqno;
283 
284 		/**
285 		 * Waiting sequence number, if any
286 		 */
287 		uint32_t waiting_gem_seqno;
288 
289 		/**
290 		 * Last seq seen at irq time
291 		 */
292 		uint32_t irq_gem_seqno;
293 
294 		/**
295 		 * Flag if the X Server, and thus DRM, is not currently in
296 		 * control of the device.
297 		 *
298 		 * This is set between LeaveVT and EnterVT.  It needs to be
299 		 * replaced with a semaphore.  It also needs to be
300 		 * transitioned away from for kernel modesetting.
301 		 */
302 		int suspended;
303 
304 		/**
305 		 * Flag if the hardware appears to be wedged.
306 		 *
307 		 * This is set when attempts to idle the device timeout.
308 		 * It prevents command submission from occuring and makes
309 		 * every pending request fail
310 		 */
311 		int wedged;
312 
313 		/** Bit 6 swizzling required for X tiling */
314 		uint32_t bit_6_swizzle_x;
315 		/** Bit 6 swizzling required for Y tiling */
316 		uint32_t bit_6_swizzle_y;
317 	} mm;
318 } drm_i915_private_t;
319 
320 enum intel_chip_family {
321 	CHIP_I8XX = 0x01,
322 	CHIP_I9XX = 0x02,
323 	CHIP_I915 = 0x04,
324 	CHIP_I965 = 0x08,
325 };
326 
327 /** driver private structure attached to each drm_gem_object */
328 struct drm_i915_gem_object {
329 	struct drm_gem_object *obj;
330 
331 	/** Current space allocated to this object in the GTT, if any. */
332 	struct drm_mm_node *gtt_space;
333 
334 	/** This object's place on the active/flushing/inactive lists */
335 	struct list_head list;
336 
337 	/**
338 	 * This is set if the object is on the active or flushing lists
339 	 * (has pending rendering), and is not set if it's on inactive (ready
340 	 * to be unbound).
341 	 */
342 	int active;
343 
344 	/**
345 	 * This is set if the object has been written to since last bound
346 	 * to the GTT
347 	 */
348 	int dirty;
349 
350 	/** AGP memory structure for our GTT binding. */
351 	DRM_AGP_MEM *agp_mem;
352 
353 	struct page **page_list;
354 
355 	/**
356 	 * Current offset of the object in GTT space.
357 	 *
358 	 * This is the same as gtt_space->start
359 	 */
360 	uint32_t gtt_offset;
361 
362 	/** Boolean whether this object has a valid gtt offset. */
363 	int gtt_bound;
364 
365 	/** How many users have pinned this object in GTT space */
366 	int pin_count;
367 
368 	/** Breadcrumb of last rendering to the buffer. */
369 	uint32_t last_rendering_seqno;
370 
371 	/** Current tiling mode for the object. */
372 	uint32_t tiling_mode;
373 
374 	/** AGP mapping type (AGP_USER_MEMORY or AGP_USER_CACHED_MEMORY */
375 	uint32_t agp_type;
376 
377 	/**
378 	 * Flagging of which individual pages are valid in GEM_DOMAIN_CPU when
379 	 * GEM_DOMAIN_CPU is not in the object's read domain.
380 	 */
381 	uint8_t *page_cpu_valid;
382 };
383 
384 /**
385  * Request queue structure.
386  *
387  * The request queue allows us to note sequence numbers that have been emitted
388  * and may be associated with active buffers to be retired.
389  *
390  * By keeping this list, we can avoid having to do questionable
391  * sequence-number comparisons on buffer last_rendering_seqnos, and associate
392  * an emission time with seqnos for tracking how far ahead of the GPU we are.
393  */
394 struct drm_i915_gem_request {
395 	/** GEM sequence number associated with this request. */
396 	uint32_t seqno;
397 
398 	/** Time at which this request was emitted, in jiffies. */
399 	unsigned long emitted_jiffies;
400 
401 	/** Cache domains that were flushed at the start of the request. */
402 	uint32_t flush_domains;
403 
404 	struct list_head list;
405 };
406 
407 struct drm_i915_file_private {
408 	struct {
409 		uint32_t last_gem_seqno;
410 		uint32_t last_gem_throttle_seqno;
411 	} mm;
412 };
413 
414 extern struct drm_ioctl_desc i915_ioctls[];
415 extern int i915_max_ioctl;
416 
417 				/* i915_dma.c */
418 extern void i915_kernel_lost_context(struct drm_device * dev);
419 extern int i915_driver_load(struct drm_device *, unsigned long flags);
420 extern int i915_driver_unload(struct drm_device *);
421 extern int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv);
422 extern void i915_driver_lastclose(struct drm_device * dev);
423 extern void i915_driver_preclose(struct drm_device *dev,
424 				 struct drm_file *file_priv);
425 extern void i915_driver_postclose(struct drm_device *dev,
426 				  struct drm_file *file_priv);
427 extern int i915_driver_device_is_agp(struct drm_device * dev);
428 extern long i915_compat_ioctl(struct file *filp, unsigned int cmd,
429 			      unsigned long arg);
430 extern int i915_emit_box(struct drm_device *dev,
431 			 struct drm_clip_rect __user *boxes,
432 			 int i, int DR1, int DR4);
433 
434 /* i915_irq.c */
435 extern int i915_irq_emit(struct drm_device *dev, void *data,
436 			 struct drm_file *file_priv);
437 extern int i915_irq_wait(struct drm_device *dev, void *data,
438 			 struct drm_file *file_priv);
439 void i915_user_irq_get(struct drm_device *dev);
440 void i915_user_irq_put(struct drm_device *dev);
441 
442 extern irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS);
443 extern void i915_driver_irq_preinstall(struct drm_device * dev);
444 extern int i915_driver_irq_postinstall(struct drm_device *dev);
445 extern void i915_driver_irq_uninstall(struct drm_device * dev);
446 extern int i915_vblank_pipe_set(struct drm_device *dev, void *data,
447 				struct drm_file *file_priv);
448 extern int i915_vblank_pipe_get(struct drm_device *dev, void *data,
449 				struct drm_file *file_priv);
450 extern int i915_enable_vblank(struct drm_device *dev, int crtc);
451 extern void i915_disable_vblank(struct drm_device *dev, int crtc);
452 extern u32 i915_get_vblank_counter(struct drm_device *dev, int crtc);
453 extern u32 g45_get_vblank_counter(struct drm_device *dev, int crtc);
454 extern int i915_vblank_swap(struct drm_device *dev, void *data,
455 			    struct drm_file *file_priv);
456 
457 void
458 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask);
459 
460 void
461 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask);
462 
463 
464 /* i915_mem.c */
465 extern int i915_mem_alloc(struct drm_device *dev, void *data,
466 			  struct drm_file *file_priv);
467 extern int i915_mem_free(struct drm_device *dev, void *data,
468 			 struct drm_file *file_priv);
469 extern int i915_mem_init_heap(struct drm_device *dev, void *data,
470 			      struct drm_file *file_priv);
471 extern int i915_mem_destroy_heap(struct drm_device *dev, void *data,
472 				 struct drm_file *file_priv);
473 extern void i915_mem_takedown(struct mem_block **heap);
474 extern void i915_mem_release(struct drm_device * dev,
475 			     struct drm_file *file_priv, struct mem_block *heap);
476 #ifdef I915_HAVE_GEM
477 /* i915_gem.c */
478 int i915_gem_init_ioctl(struct drm_device *dev, void *data,
479 			struct drm_file *file_priv);
480 int i915_gem_create_ioctl(struct drm_device *dev, void *data,
481 			  struct drm_file *file_priv);
482 int i915_gem_pread_ioctl(struct drm_device *dev, void *data,
483 			 struct drm_file *file_priv);
484 int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
485 			  struct drm_file *file_priv);
486 int i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
487 			struct drm_file *file_priv);
488 int i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
489 			      struct drm_file *file_priv);
490 int i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
491 			     struct drm_file *file_priv);
492 int i915_gem_execbuffer(struct drm_device *dev, void *data,
493 			struct drm_file *file_priv);
494 int i915_gem_pin_ioctl(struct drm_device *dev, void *data,
495 		       struct drm_file *file_priv);
496 int i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
497 			 struct drm_file *file_priv);
498 int i915_gem_busy_ioctl(struct drm_device *dev, void *data,
499 			struct drm_file *file_priv);
500 int i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
501 			    struct drm_file *file_priv);
502 int i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
503 			   struct drm_file *file_priv);
504 int i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
505 			   struct drm_file *file_priv);
506 int i915_gem_set_tiling(struct drm_device *dev, void *data,
507 			struct drm_file *file_priv);
508 int i915_gem_get_tiling(struct drm_device *dev, void *data,
509 			struct drm_file *file_priv);
510 void i915_gem_load(struct drm_device *dev);
511 int i915_gem_proc_init(struct drm_minor *minor);
512 void i915_gem_proc_cleanup(struct drm_minor *minor);
513 int i915_gem_init_object(struct drm_gem_object *obj);
514 void i915_gem_free_object(struct drm_gem_object *obj);
515 int i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment);
516 void i915_gem_object_unpin(struct drm_gem_object *obj);
517 void i915_gem_lastclose(struct drm_device *dev);
518 uint32_t i915_get_gem_seqno(struct drm_device *dev);
519 void i915_gem_retire_requests(struct drm_device *dev);
520 void i915_gem_retire_work_handler(struct work_struct *work);
521 void i915_gem_clflush_object(struct drm_gem_object *obj);
522 
523 /* i915_gem_tiling.c */
524 void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
525 
526 /* i915_gem_debug.c */
527 void i915_gem_dump_object(struct drm_gem_object *obj, int len,
528 			  const char *where, uint32_t mark);
529 #if WATCH_INACTIVE
530 void i915_verify_inactive(struct drm_device *dev, char *file, int line);
531 #else
532 #define i915_verify_inactive(dev, file, line)
533 #endif
534 void i915_gem_object_check_coherency(struct drm_gem_object *obj, int handle);
535 void i915_gem_dump_object(struct drm_gem_object *obj, int len,
536 			  const char *where, uint32_t mark);
537 void i915_dump_lru(struct drm_device *dev, const char *where);
538 #endif /* I915_HAVE_GEM */
539 
540 /* i915_suspend.c */
541 extern int i915_save_state(struct drm_device *dev);
542 extern int i915_restore_state(struct drm_device *dev);
543 
544 /* i915_opregion.c */
545 extern int intel_opregion_init(struct drm_device *dev);
546 extern void intel_opregion_free(struct drm_device *dev);
547 extern void opregion_asle_intr(struct drm_device *dev);
548 extern void opregion_enable_asle(struct drm_device *dev);
549 
550 /**
551  * Lock test for when it's just for synchronization of ring access.
552  *
553  * In that case, we don't need to do it when GEM is initialized as nobody else
554  * has access to the ring.
555  */
556 #define RING_LOCK_TEST_WITH_RETURN(dev, file_priv) do {			\
557 	if (((drm_i915_private_t *)dev->dev_private)->ring.ring_obj == NULL) \
558 		LOCK_TEST_WITH_RETURN(dev, file_priv);			\
559 } while (0)
560 
561 #if defined(__FreeBSD__)
562 typedef boolean_t bool;
563 #endif
564 
565 #define I915_READ(reg)		DRM_READ32(dev_priv->mmio_map, (reg))
566 #define I915_WRITE(reg,val)	DRM_WRITE32(dev_priv->mmio_map, (reg), (val))
567 #define I915_READ16(reg)	DRM_READ16(dev_priv->mmio_map, (reg))
568 #define I915_WRITE16(reg,val)	DRM_WRITE16(dev_priv->mmio_map, (reg), (val))
569 #define I915_READ8(reg)		DRM_READ8(dev_priv->mmio_map, (reg))
570 #define I915_WRITE8(reg,val)	DRM_WRITE8(dev_priv->mmio_map, (reg), (val))
571 
572 #define I915_VERBOSE 0
573 
574 #define RING_LOCALS	unsigned int outring, ringmask, outcount; \
575                         volatile char *virt;
576 
577 #define BEGIN_LP_RING(n) do {				\
578 	if (I915_VERBOSE)				\
579 		DRM_DEBUG("BEGIN_LP_RING(%d)\n", (n));	\
580 	if (dev_priv->ring.space < (n)*4)		\
581 		i915_wait_ring(dev, (n)*4, __func__);		\
582 	outcount = 0;					\
583 	outring = dev_priv->ring.tail;			\
584 	ringmask = dev_priv->ring.tail_mask;		\
585 	virt = dev_priv->ring.virtual_start;		\
586 } while (0)
587 
588 #define OUT_RING(n) do {					\
589 	if (I915_VERBOSE) DRM_DEBUG("   OUT_RING %x\n", (int)(n));	\
590 	*(volatile unsigned int *)(virt + outring) = (n);	\
591         outcount++;						\
592 	outring += 4;						\
593 	outring &= ringmask;					\
594 } while (0)
595 
596 #define ADVANCE_LP_RING() do {						\
597 	if (I915_VERBOSE) DRM_DEBUG("ADVANCE_LP_RING %x\n", outring);	\
598 	dev_priv->ring.tail = outring;					\
599 	dev_priv->ring.space -= outcount * 4;				\
600 	I915_WRITE(PRB0_TAIL, outring);			\
601 } while(0)
602 
603 /**
604  * Reads a dword out of the status page, which is written to from the command
605  * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or
606  * MI_STORE_DATA_IMM.
607  *
608  * The following dwords have a reserved meaning:
609  * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes.
610  * 0x04: ring 0 head pointer
611  * 0x05: ring 1 head pointer (915-class)
612  * 0x06: ring 2 head pointer (915-class)
613  * 0x10-0x1b: Context status DWords (GM45)
614  * 0x1f: Last written status offset. (GM45)
615  *
616  * The area from dword 0x20 to 0x3ff is available for driver usage.
617  */
618 #define READ_HWSP(dev_priv, reg)  (((volatile u32*)(dev_priv->hw_status_page))[reg])
619 #define READ_BREADCRUMB(dev_priv) READ_HWSP(dev_priv, I915_BREADCRUMB_INDEX)
620 #define I915_GEM_HWS_INDEX		0x20
621 #define I915_BREADCRUMB_INDEX		0x21
622 
623 extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
624 
625 #define IS_I830(dev) ((dev)->pci_device == 0x3577)
626 #define IS_845G(dev) ((dev)->pci_device == 0x2562)
627 #define IS_I85X(dev) ((dev)->pci_device == 0x3582)
628 #define IS_I855(dev) ((dev)->pci_device == 0x3582)
629 #define IS_I865G(dev) ((dev)->pci_device == 0x2572)
630 
631 #define IS_I915G(dev) ((dev)->pci_device == 0x2582 || (dev)->pci_device == 0x258a)
632 #define IS_I915GM(dev) ((dev)->pci_device == 0x2592)
633 #define IS_I945G(dev) ((dev)->pci_device == 0x2772)
634 #define IS_I945GM(dev) ((dev)->pci_device == 0x27A2 ||\
635 		        (dev)->pci_device == 0x27AE)
636 #define IS_I965G(dev) ((dev)->pci_device == 0x2972 || \
637 		       (dev)->pci_device == 0x2982 || \
638 		       (dev)->pci_device == 0x2992 || \
639 		       (dev)->pci_device == 0x29A2 || \
640 		       (dev)->pci_device == 0x2A02 || \
641 		       (dev)->pci_device == 0x2A12 || \
642 		       (dev)->pci_device == 0x2A42 || \
643 		       (dev)->pci_device == 0x2E02 || \
644 		       (dev)->pci_device == 0x2E12 || \
645 		       (dev)->pci_device == 0x2E22 || \
646 		       (dev)->pci_device == 0x2E32)
647 
648 #define IS_I965GM(dev) ((dev)->pci_device == 0x2A02)
649 
650 #define IS_GM45(dev) ((dev)->pci_device == 0x2A42)
651 
652 #define IS_G4X(dev) ((dev)->pci_device == 0x2E02 || \
653 		     (dev)->pci_device == 0x2E12 || \
654 		     (dev)->pci_device == 0x2E22 || \
655 		     (dev)->pci_device == 0x2E32 || \
656 		     IS_GM45(dev))
657 
658 #define IS_IGDG(dev)	((dev)->pci_device == 0xa001)
659 #define IS_IGDGM(dev)	((dev)->pci_device == 0xa011)
660 #define IS_IGD(dev)	(IS_IGDG(dev) || IS_IGDGM(dev))
661 
662 #define IS_G33(dev)    ((dev)->pci_device == 0x29C2 ||	\
663 			(dev)->pci_device == 0x29B2 ||	\
664 			(dev)->pci_device == 0x29D2 ||	\
665 			IS_IGD(dev))
666 
667 #define IS_I9XX(dev) (IS_I915G(dev) || IS_I915GM(dev) || IS_I945G(dev) || \
668 		      IS_I945GM(dev) || IS_I965G(dev) || IS_G33(dev))
669 
670 #define IS_MOBILE(dev) (IS_I830(dev) || IS_I85X(dev) || IS_I915GM(dev) || \
671 			IS_I945GM(dev) || IS_I965GM(dev) || IS_GM45(dev) || \
672 			IS_IGD(dev))
673 
674 #define I915_NEED_GFX_HWS(dev) (IS_G33(dev) || IS_GM45(dev) || IS_G4X(dev))
675 
676 #define PRIMARY_RINGBUFFER_SIZE         (128*1024)
677 
678 #endif
679