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 "i915_reg.h"
34 
35 /* General customization:
36  */
37 
38 #define DRIVER_AUTHOR		"Tungsten Graphics, Inc."
39 
40 #define DRIVER_NAME		"i915"
41 #define DRIVER_DESC		"Intel Graphics"
42 #define DRIVER_DATE		"20080730"
43 
44 enum pipex {
45 	PIPE_A = 0,
46 	PIPE_B,
47 };
48 
49 #define I915_NUM_PIPE	2
50 
51 /* Interface history:
52  *
53  * 1.1: Original.
54  * 1.2: Add Power Management
55  * 1.3: Add vblank support
56  * 1.4: Fix cmdbuffer path, add heap destroy
57  * 1.5: Add vblank pipe configuration
58  * 1.6: - New ioctl for scheduling buffer swaps on vertical blank
59  *      - Support vertical blank on secondary display pipe
60  */
61 #define DRIVER_MAJOR		1
62 #define DRIVER_MINOR		6
63 #define DRIVER_PATCHLEVEL	0
64 
65 #define WATCH_COHERENCY	0
66 #define WATCH_BUF	0
67 #define WATCH_EXEC	0
68 #define WATCH_LRU	0
69 #define WATCH_RELOC	0
70 #define WATCH_INACTIVE	0
71 #define WATCH_PWRITE	0
72 
73 typedef struct _drm_i915_ring_buffer {
74 	int tail_mask;
75 	unsigned long Size;
76 	u8 *virtual_start;
77 	int head;
78 	int tail;
79 	int space;
80 	drm_local_map_t map;
81 	struct drm_gem_object *ring_obj;
82 } drm_i915_ring_buffer_t;
83 
84 struct mem_block {
85 	struct mem_block *next;
86 	struct mem_block *prev;
87 	int start;
88 	int size;
89 	struct drm_file *file_priv; /* NULL: free, -1: heap, other: real files */
90 };
91 
92 struct opregion_header;
93 struct opregion_acpi;
94 struct opregion_swsci;
95 struct opregion_asle;
96 
97 struct intel_opregion {
98 	struct opregion_header *header;
99 	struct opregion_acpi *acpi;
100 	struct opregion_swsci *swsci;
101 	struct opregion_asle *asle;
102 	int enabled;
103 };
104 
105 typedef struct drm_i915_private {
106 	struct drm_device *dev;
107 
108 	drm_local_map_t *sarea;
109 	drm_local_map_t *mmio_map;
110 
111 	drm_i915_sarea_t *sarea_priv;
112 	drm_i915_ring_buffer_t ring;
113 
114 	drm_dma_handle_t *status_page_dmah;
115 	void *hw_status_page;
116 	dma_addr_t dma_status_page;
117 	uint32_t counter;
118 	unsigned int status_gfx_addr;
119 	drm_local_map_t hws_map;
120 	struct drm_gem_object *hws_obj;
121 
122 	unsigned int cpp;
123 	int back_offset;
124 	int front_offset;
125 	int current_page;
126 	int page_flipping;
127 
128 	wait_queue_head_t irq_queue;
129 	atomic_t irq_received;
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 savePIPEACONF;
152 	u32 savePIPEBCONF;
153 	u32 savePIPEASRC;
154 	u32 savePIPEBSRC;
155 	u32 saveFPA0;
156 	u32 saveFPA1;
157 	u32 saveDPLL_A;
158 	u32 saveDPLL_A_MD;
159 	u32 saveHTOTAL_A;
160 	u32 saveHBLANK_A;
161 	u32 saveHSYNC_A;
162 	u32 saveVTOTAL_A;
163 	u32 saveVBLANK_A;
164 	u32 saveVSYNC_A;
165 	u32 saveBCLRPAT_A;
166 	u32 savePIPEASTAT;
167 	u32 saveDSPASTRIDE;
168 	u32 saveDSPASIZE;
169 	u32 saveDSPAPOS;
170 	u32 saveDSPAADDR;
171 	u32 saveDSPASURF;
172 	u32 saveDSPATILEOFF;
173 	u32 savePFIT_PGM_RATIOS;
174 	u32 saveBLC_PWM_CTL;
175 	u32 saveBLC_PWM_CTL2;
176 	u32 saveFPB0;
177 	u32 saveFPB1;
178 	u32 saveDPLL_B;
179 	u32 saveDPLL_B_MD;
180 	u32 saveHTOTAL_B;
181 	u32 saveHBLANK_B;
182 	u32 saveHSYNC_B;
183 	u32 saveVTOTAL_B;
184 	u32 saveVBLANK_B;
185 	u32 saveVSYNC_B;
186 	u32 saveBCLRPAT_B;
187 	u32 savePIPEBSTAT;
188 	u32 saveDSPBSTRIDE;
189 	u32 saveDSPBSIZE;
190 	u32 saveDSPBPOS;
191 	u32 saveDSPBADDR;
192 	u32 saveDSPBSURF;
193 	u32 saveDSPBTILEOFF;
194 	u32 saveVGA0;
195 	u32 saveVGA1;
196 	u32 saveVGA_PD;
197 	u32 saveVGACNTRL;
198 	u32 saveADPA;
199 	u32 saveLVDS;
200 	u32 savePP_ON_DELAYS;
201 	u32 savePP_OFF_DELAYS;
202 	u32 saveDVOA;
203 	u32 saveDVOB;
204 	u32 saveDVOC;
205 	u32 savePP_ON;
206 	u32 savePP_OFF;
207 	u32 savePP_CONTROL;
208 	u32 savePP_DIVISOR;
209 	u32 savePFIT_CONTROL;
210 	u32 save_palette_a[256];
211 	u32 save_palette_b[256];
212 	u32 saveFBC_CFB_BASE;
213 	u32 saveFBC_LL_BASE;
214 	u32 saveFBC_CONTROL;
215 	u32 saveFBC_CONTROL2;
216 	u32 saveIER;
217 	u32 saveIIR;
218 	u32 saveIMR;
219 	u32 saveCACHE_MODE_0;
220 	u32 saveD_STATE;
221 	u32 saveCG_2D_DIS;
222 	u32 saveMI_ARB_STATE;
223 	u32 saveSWF0[16];
224 	u32 saveSWF1[16];
225 	u32 saveSWF2[3];
226 	u8 saveMSR;
227 	u8 saveSR[8];
228 	u8 saveGR[25];
229 	u8 saveAR_INDEX;
230 	u8 saveAR[21];
231 	u8 saveDACMASK;
232 	u8 saveDACDATA[256*3]; /* 256 3-byte colors */
233 	u8 saveCR[37];
234 	struct {
235 		/**
236 		 * List of objects currently involved in rendering from the
237 		 * ringbuffer.
238 		 *
239 		 * A reference is held on the buffer while on this list.
240 		 */
241 		struct list_head active_list;
242 
243 		/**
244 		 * List of objects which are not in the ringbuffer but which
245 		 * still have a write_domain which needs to be flushed before
246 		 * unbinding.
247 		 *
248 		 * A reference is held on the buffer while on this list.
249 		 */
250 		struct list_head flushing_list;
251 
252 		/**
253 		 * LRU list of objects which are not in the ringbuffer and
254 		 * are ready to unbind, but are still in the GTT.
255 		 *
256 		 * A reference is not held on the buffer while on this list,
257 		 * as merely being GTT-bound shouldn't prevent its being
258 		 * freed, and we'll pull it off the list in the free path.
259 		 */
260 		struct list_head inactive_list;
261 
262 		/**
263 		 * List of breadcrumbs associated with GPU requests currently
264 		 * outstanding.
265 		 */
266 		struct list_head request_list;
267 		uint32_t next_gem_seqno;
268 
269 		/**
270 		 * Waiting sequence number, if any
271 		 */
272 		uint32_t waiting_gem_seqno;
273 
274 		/**
275 		 * Last seq seen at irq time
276 		 */
277 		uint32_t irq_gem_seqno;
278 
279 		/**
280 		 * Flag if the X Server, and thus DRM, is not currently in
281 		 * control of the device.
282 		 *
283 		 * This is set between LeaveVT and EnterVT.  It needs to be
284 		 * replaced with a semaphore.  It also needs to be
285 		 * transitioned away from for kernel modesetting.
286 		 */
287 		int suspended;
288 
289 		/**
290 		 * Flag if the hardware appears to be wedged.
291 		 *
292 		 * This is set when attempts to idle the device timeout.
293 		 * It prevents command submission from occuring and makes
294 		 * every pending request fail
295 		 */
296 		int wedged;
297 
298 		/** Bit 6 swizzling required for X tiling */
299 		uint32_t bit_6_swizzle_x;
300 		/** Bit 6 swizzling required for Y tiling */
301 		uint32_t bit_6_swizzle_y;
302 	} mm;
303 } drm_i915_private_t;
304 
305 enum intel_chip_family {
306 	CHIP_I8XX = 0x01,
307 	CHIP_I9XX = 0x02,
308 	CHIP_I915 = 0x04,
309 	CHIP_I965 = 0x08,
310 };
311 
312 /** driver private structure attached to each drm_gem_object */
313 struct drm_i915_gem_object {
314 	struct drm_gem_object *obj;
315 
316 	/** Current space allocated to this object in the GTT, if any. */
317 	struct drm_mm_node *gtt_space;
318 
319 	/** This object's place on the active/flushing/inactive lists */
320 	struct list_head list;
321 
322 	/**
323 	 * This is set if the object is on the active or flushing lists
324 	 * (has pending rendering), and is not set if it's on inactive (ready
325 	 * to be unbound).
326 	 */
327 	int active;
328 
329 	/**
330 	 * This is set if the object has been written to since last bound
331 	 * to the GTT
332 	 */
333 	int dirty;
334 
335 	/** AGP memory structure for our GTT binding. */
336 	DRM_AGP_MEM *agp_mem;
337 
338 	struct page **page_list;
339 
340 	/**
341 	 * Current offset of the object in GTT space.
342 	 *
343 	 * This is the same as gtt_space->start
344 	 */
345 	uint32_t gtt_offset;
346 
347 	/** Boolean whether this object has a valid gtt offset. */
348 	int gtt_bound;
349 
350 	/** How many users have pinned this object in GTT space */
351 	int pin_count;
352 
353 	/** Breadcrumb of last rendering to the buffer. */
354 	uint32_t last_rendering_seqno;
355 
356 	/** Current tiling mode for the object. */
357 	uint32_t tiling_mode;
358 
359 	/** AGP mapping type (AGP_USER_MEMORY or AGP_USER_CACHED_MEMORY */
360 	uint32_t agp_type;
361 
362 	/**
363 	 * Flagging of which individual pages are valid in GEM_DOMAIN_CPU when
364 	 * GEM_DOMAIN_CPU is not in the object's read domain.
365 	 */
366 	uint8_t *page_cpu_valid;
367 };
368 
369 /**
370  * Request queue structure.
371  *
372  * The request queue allows us to note sequence numbers that have been emitted
373  * and may be associated with active buffers to be retired.
374  *
375  * By keeping this list, we can avoid having to do questionable
376  * sequence-number comparisons on buffer last_rendering_seqnos, and associate
377  * an emission time with seqnos for tracking how far ahead of the GPU we are.
378  */
379 struct drm_i915_gem_request {
380 	/** GEM sequence number associated with this request. */
381 	uint32_t seqno;
382 
383 	/** Time at which this request was emitted, in jiffies. */
384 	unsigned long emitted_jiffies;
385 
386 	/** Cache domains that were flushed at the start of the request. */
387 	uint32_t flush_domains;
388 
389 	struct list_head list;
390 };
391 
392 struct drm_i915_file_private {
393 	struct {
394 		uint32_t last_gem_seqno;
395 		uint32_t last_gem_throttle_seqno;
396 	} mm;
397 };
398 
399 extern struct drm_ioctl_desc i915_ioctls[];
400 extern int i915_max_ioctl;
401 
402 				/* i915_dma.c */
403 extern void i915_kernel_lost_context(struct drm_device * dev);
404 extern int i915_driver_load(struct drm_device *, unsigned long flags);
405 extern int i915_driver_unload(struct drm_device *);
406 extern int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv);
407 extern void i915_driver_lastclose(struct drm_device * dev);
408 extern void i915_driver_preclose(struct drm_device *dev,
409 				 struct drm_file *file_priv);
410 extern void i915_driver_postclose(struct drm_device *dev,
411 				  struct drm_file *file_priv);
412 extern int i915_driver_device_is_agp(struct drm_device * dev);
413 extern long i915_compat_ioctl(struct file *filp, unsigned int cmd,
414 			      unsigned long arg);
415 extern int i915_emit_box(struct drm_device *dev,
416 			 struct drm_clip_rect __user *boxes,
417 			 int i, int DR1, int DR4);
418 
419 /* i915_irq.c */
420 extern int i915_irq_emit(struct drm_device *dev, void *data,
421 			 struct drm_file *file_priv);
422 extern int i915_irq_wait(struct drm_device *dev, void *data,
423 			 struct drm_file *file_priv);
424 void i915_user_irq_get(struct drm_device *dev);
425 void i915_user_irq_put(struct drm_device *dev);
426 
427 extern irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS);
428 extern void i915_driver_irq_preinstall(struct drm_device * dev);
429 extern int i915_driver_irq_postinstall(struct drm_device *dev);
430 extern void i915_driver_irq_uninstall(struct drm_device * dev);
431 extern int i915_vblank_pipe_set(struct drm_device *dev, void *data,
432 				struct drm_file *file_priv);
433 extern int i915_vblank_pipe_get(struct drm_device *dev, void *data,
434 				struct drm_file *file_priv);
435 extern int i915_enable_vblank(struct drm_device *dev, unsigned int crtc);
436 extern void i915_disable_vblank(struct drm_device *dev, unsigned int crtc);
437 extern u32 i915_get_vblank_counter(struct drm_device *dev, unsigned int crtc);
438 extern u32 gm45_get_vblank_counter(struct drm_device *dev, unsigned int crtc);
439 extern int i915_vblank_swap(struct drm_device *dev, void *data,
440 			    struct drm_file *file_priv);
441 
442 void
443 i915_enable_pipestat(drm_i915_private_t *dev_priv, unsigned int pipe, u32 mask);
444 
445 void
446 i915_disable_pipestat(drm_i915_private_t *dev_priv, unsigned int pipe, u32 mask);
447 
448 
449 /* i915_mem.c */
450 extern int i915_mem_alloc(struct drm_device *dev, void *data,
451 			  struct drm_file *file_priv);
452 extern int i915_mem_free(struct drm_device *dev, void *data,
453 			 struct drm_file *file_priv);
454 extern int i915_mem_init_heap(struct drm_device *dev, void *data,
455 			      struct drm_file *file_priv);
456 extern int i915_mem_destroy_heap(struct drm_device *dev, void *data,
457 				 struct drm_file *file_priv);
458 extern void i915_mem_takedown(struct mem_block **heap);
459 extern void i915_mem_release(struct drm_device * dev,
460 			     struct drm_file *file_priv, struct mem_block *heap);
461 #ifdef I915_HAVE_GEM
462 /* i915_gem.c */
463 int i915_gem_init_ioctl(struct drm_device *dev, void *data,
464 			struct drm_file *file_priv);
465 int i915_gem_create_ioctl(struct drm_device *dev, void *data,
466 			  struct drm_file *file_priv);
467 int i915_gem_pread_ioctl(struct drm_device *dev, void *data,
468 			 struct drm_file *file_priv);
469 int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
470 			  struct drm_file *file_priv);
471 int i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
472 			struct drm_file *file_priv);
473 int i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
474 			      struct drm_file *file_priv);
475 int i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
476 			     struct drm_file *file_priv);
477 int i915_gem_execbuffer(struct drm_device *dev, void *data,
478 			struct drm_file *file_priv);
479 int i915_gem_pin_ioctl(struct drm_device *dev, void *data,
480 		       struct drm_file *file_priv);
481 int i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
482 			 struct drm_file *file_priv);
483 int i915_gem_busy_ioctl(struct drm_device *dev, void *data,
484 			struct drm_file *file_priv);
485 int i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
486 			    struct drm_file *file_priv);
487 int i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
488 			   struct drm_file *file_priv);
489 int i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
490 			   struct drm_file *file_priv);
491 int i915_gem_set_tiling(struct drm_device *dev, void *data,
492 			struct drm_file *file_priv);
493 int i915_gem_get_tiling(struct drm_device *dev, void *data,
494 			struct drm_file *file_priv);
495 void i915_gem_load(struct drm_device *dev);
496 int i915_gem_proc_init(struct drm_minor *minor);
497 void i915_gem_proc_cleanup(struct drm_minor *minor);
498 int i915_gem_init_object(struct drm_gem_object *obj);
499 void i915_gem_free_object(struct drm_gem_object *obj);
500 int i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment);
501 void i915_gem_object_unpin(struct drm_gem_object *obj);
502 void i915_gem_lastclose(struct drm_device *dev);
503 uint32_t i915_get_gem_seqno(struct drm_device *dev);
504 void i915_gem_retire_requests(struct drm_device *dev);
505 void i915_gem_retire_work_handler(struct work_struct *work);
506 void i915_gem_clflush_object(struct drm_gem_object *obj);
507 
508 /* i915_gem_tiling.c */
509 void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
510 
511 /* i915_gem_debug.c */
512 void i915_gem_dump_object(struct drm_gem_object *obj, int len,
513 			  const char *where, uint32_t mark);
514 #if WATCH_INACTIVE
515 void i915_verify_inactive(struct drm_device *dev, char *file, int line);
516 #else
517 #define i915_verify_inactive(dev, file, line)
518 #endif
519 void i915_gem_object_check_coherency(struct drm_gem_object *obj, int handle);
520 void i915_gem_dump_object(struct drm_gem_object *obj, int len,
521 			  const char *where, uint32_t mark);
522 void i915_dump_lru(struct drm_device *dev, const char *where);
523 #endif /* I915_HAVE_GEM */
524 
525 /* i915_suspend.c */
526 extern int i915_save_state(struct drm_device *dev);
527 extern int i915_restore_state(struct drm_device *dev);
528 
529 /* i915_opregion.c */
530 extern int intel_opregion_init(struct drm_device *dev);
531 extern void intel_opregion_free(struct drm_device *dev);
532 extern void opregion_asle_intr(struct drm_device *dev);
533 extern void opregion_enable_asle(struct drm_device *dev);
534 
535 /**
536  * Lock test for when it's just for synchronization of ring access.
537  *
538  * In that case, we don't need to do it when GEM is initialized as nobody else
539  * has access to the ring.
540  */
541 #define RING_LOCK_TEST_WITH_RETURN(dev, file_priv) do {			\
542 	if (((drm_i915_private_t *)dev->dev_private)->ring.ring_obj == NULL) \
543 		LOCK_TEST_WITH_RETURN(dev, file_priv);			\
544 } while (0)
545 
546 #define I915_READ(reg)		DRM_READ32(dev_priv->mmio_map, (reg))
547 #define I915_WRITE(reg,val)	DRM_WRITE32(dev_priv->mmio_map, (reg), (val))
548 #define I915_READ16(reg)	DRM_READ16(dev_priv->mmio_map, (reg))
549 #define I915_WRITE16(reg,val)	DRM_WRITE16(dev_priv->mmio_map, (reg), (val))
550 #define I915_READ8(reg)		DRM_READ8(dev_priv->mmio_map, (reg))
551 #define I915_WRITE8(reg,val)	DRM_WRITE8(dev_priv->mmio_map, (reg), (val))
552 
553 #define I915_VERBOSE 0
554 
555 #define RING_LOCALS	unsigned int outring, ringmask, outcount; \
556                         volatile char *virt;
557 
558 #define BEGIN_LP_RING(n) do {				\
559 	if (I915_VERBOSE)				\
560 		DRM_DEBUG("BEGIN_LP_RING(%d)\n", (n));	\
561 	if (dev_priv->ring.space < (n)*4)		\
562 		i915_wait_ring(dev, (n)*4, __func__);		\
563 	outcount = 0;					\
564 	outring = dev_priv->ring.tail;			\
565 	ringmask = dev_priv->ring.tail_mask;		\
566 	virt = dev_priv->ring.virtual_start;		\
567 } while (0)
568 
569 #define OUT_RING(n) do {					\
570 	if (I915_VERBOSE) DRM_DEBUG("   OUT_RING %x\n", (int)(n));	\
571 	*(volatile unsigned int *)(virt + outring) = (n);	\
572         outcount++;						\
573 	outring += 4;						\
574 	outring &= ringmask;					\
575 } while (0)
576 
577 #define ADVANCE_LP_RING() do {						\
578 	if (I915_VERBOSE) DRM_DEBUG("ADVANCE_LP_RING %x\n", outring);	\
579 	dev_priv->ring.tail = outring;					\
580 	dev_priv->ring.space -= outcount * 4;				\
581 	I915_WRITE(PRB0_TAIL, outring);			\
582 } while(0)
583 
584 /**
585  * Reads a dword out of the status page, which is written to from the command
586  * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or
587  * MI_STORE_DATA_IMM.
588  *
589  * The following dwords have a reserved meaning:
590  * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes.
591  * 0x04: ring 0 head pointer
592  * 0x05: ring 1 head pointer (915-class)
593  * 0x06: ring 2 head pointer (915-class)
594  * 0x10-0x1b: Context status DWords (GM45)
595  * 0x1f: Last written status offset. (GM45)
596  *
597  * The area from dword 0x20 to 0x3ff is available for driver usage.
598  */
599 #define READ_HWSP(dev_priv, reg)  (((volatile u32*)(dev_priv->hw_status_page))[reg])
600 #define READ_BREADCRUMB(dev_priv) READ_HWSP(dev_priv, I915_BREADCRUMB_INDEX)
601 #define I915_GEM_HWS_INDEX		0x20
602 #define I915_BREADCRUMB_INDEX		0x21
603 
604 extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
605 
606 #define IS_I830(dev) ((dev)->pci_device == 0x3577)
607 #define IS_845G(dev) ((dev)->pci_device == 0x2562)
608 #define IS_I85X(dev) ((dev)->pci_device == 0x3582)
609 #define IS_I855(dev) ((dev)->pci_device == 0x3582)
610 #define IS_I865G(dev) ((dev)->pci_device == 0x2572)
611 
612 #define IS_I915G(dev) ((dev)->pci_device == 0x2582 || (dev)->pci_device == 0x258a)
613 #define IS_I915GM(dev) ((dev)->pci_device == 0x2592)
614 #define IS_I945G(dev) ((dev)->pci_device == 0x2772)
615 #define IS_I945GM(dev) ((dev)->pci_device == 0x27A2 ||\
616 		        (dev)->pci_device == 0x27AE)
617 #define IS_I965G(dev) ((dev)->pci_device == 0x2972 || \
618 		       (dev)->pci_device == 0x2982 || \
619 		       (dev)->pci_device == 0x2992 || \
620 		       (dev)->pci_device == 0x29A2 || \
621 		       (dev)->pci_device == 0x2A02 || \
622 		       (dev)->pci_device == 0x2A12 || \
623 		       (dev)->pci_device == 0x2A42 || \
624 		       (dev)->pci_device == 0x2E02 || \
625 		       (dev)->pci_device == 0x2E12 || \
626 		       (dev)->pci_device == 0x2E22)
627 
628 #define IS_I965GM(dev) ((dev)->pci_device == 0x2A02)
629 
630 #define IS_GM45(dev) ((dev)->pci_device == 0x2A42)
631 
632 #define IS_G4X(dev) ((dev)->pci_device == 0x2E02 || \
633 		     (dev)->pci_device == 0x2E12 || \
634 		     (dev)->pci_device == 0x2E22)
635 
636 #define IS_IGDG(dev) ((dev)->pci_device == 0xA001)
637 #define IS_IGDGM(dev) ((dev)->pci_device == 0xA011)
638 #define IS_IGD(dev) (IS_IGDG(dev) || IS_IGDGM(dev))
639 
640 #define IS_G33(dev)    ((dev)->pci_device == 0x29C2 ||	\
641 			(dev)->pci_device == 0x29B2 ||	\
642 			(dev)->pci_device == 0x29D2 ||	\
643 			IS_IGD(dev))
644 
645 #define IS_I9XX(dev) (IS_I915G(dev) || IS_I915GM(dev) || IS_I945G(dev) || \
646 		      IS_I945GM(dev) || IS_I965G(dev) || IS_G33(dev))
647 
648 #define IS_MOBILE(dev) (IS_I830(dev) || IS_I85X(dev) || IS_I915GM(dev) || \
649 			IS_I945GM(dev) || IS_I965GM(dev) || IS_GM45(dev) || \
650 			IS_IGD(dev))
651 
652 #define I915_NEED_GFX_HWS(dev) (IS_G33(dev) || IS_GM45(dev) || IS_G4X(dev))
653 
654 #define PRIMARY_RINGBUFFER_SIZE         (128*1024)
655 
656 #endif
657