tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* r128_drv.h -- Private header for r128 driver -*- linux-c -*-
2 * Created: Mon Dec 13 09:51:11 1999 by faith@precisioninsight.com
3 */
4/*
5 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
6 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
7 * All rights reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
18 * Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
27 *
28 * Authors:
29 * Rickard E. (Rik) Faith <faith@valinux.com>
30 * Kevin E. Martin <martin@valinux.com>
31 * Gareth Hughes <gareth@valinux.com>
32 * Michel Dänzer <daenzerm@student.ethz.ch>
33 */
34
35#ifndef __R128_DRV_H__
36#define __R128_DRV_H__
37
38/* General customization:
39 */
40#define DRIVER_AUTHOR "Gareth Hughes, VA Linux Systems Inc."
41
42#define DRIVER_NAME "r128"
43#define DRIVER_DESC "ATI Rage 128"
44#define DRIVER_DATE "20030725"
45
46/* Interface history:
47 *
48 * ?? - ??
49 * 2.4 - Add support for ycbcr textures (no new ioctls)
50 * 2.5 - Add FLIP ioctl, disable FULLSCREEN.
51 */
52#define DRIVER_MAJOR 2
53#define DRIVER_MINOR 5
54#define DRIVER_PATCHLEVEL 0
55
56#define GET_RING_HEAD(dev_priv) R128_READ( R128_PM4_BUFFER_DL_RPTR )
57
58typedef struct drm_r128_freelist {
59 unsigned int age;
60 struct drm_buf *buf;
61 struct drm_r128_freelist *next;
62 struct drm_r128_freelist *prev;
63} drm_r128_freelist_t;
64
65typedef struct drm_r128_ring_buffer {
66 u32 *start;
67 u32 *end;
68 int size;
69 int size_l2qw;
70
71 u32 tail;
72 u32 tail_mask;
73 int space;
74
75 int high_mark;
76} drm_r128_ring_buffer_t;
77
78typedef struct drm_r128_private {
79 drm_r128_ring_buffer_t ring;
80 drm_r128_sarea_t *sarea_priv;
81
82 int cce_mode;
83 int cce_fifo_size;
84 int cce_running;
85
86 drm_r128_freelist_t *head;
87 drm_r128_freelist_t *tail;
88
89 int usec_timeout;
90 int is_pci;
91 unsigned long cce_buffers_offset;
92
93 atomic_t idle_count;
94
95 int page_flipping;
96 int current_page;
97 u32 crtc_offset;
98 u32 crtc_offset_cntl;
99
100 u32 color_fmt;
101 unsigned int front_offset;
102 unsigned int front_pitch;
103 unsigned int back_offset;
104 unsigned int back_pitch;
105
106 u32 depth_fmt;
107 unsigned int depth_offset;
108 unsigned int depth_pitch;
109 unsigned int span_offset;
110
111 u32 front_pitch_offset_c;
112 u32 back_pitch_offset_c;
113 u32 depth_pitch_offset_c;
114 u32 span_pitch_offset_c;
115
116 drm_local_map_t *sarea;
117 drm_local_map_t *mmio;
118 drm_local_map_t *cce_ring;
119 drm_local_map_t *ring_rptr;
120 drm_local_map_t *agp_textures;
121 struct drm_ati_pcigart_info gart_info;
122} drm_r128_private_t;
123
124typedef struct drm_r128_buf_priv {
125 u32 age;
126 int prim;
127 int discard;
128 int dispatched;
129 drm_r128_freelist_t *list_entry;
130} drm_r128_buf_priv_t;
131
132extern struct drm_ioctl_desc r128_ioctls[];
133extern int r128_max_ioctl;
134
135 /* r128_cce.c */
136extern int r128_cce_init(struct drm_device *dev, void *data, struct drm_file *file_priv);
137extern int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_priv);
138extern int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv);
139extern int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_priv);
140extern int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv);
141extern int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_priv);
142extern int r128_fullscreen(struct drm_device *dev, void *data, struct drm_file *file_priv);
143extern int r128_cce_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv);
144
145extern void r128_freelist_reset(struct drm_device * dev);
146
147extern int r128_wait_ring(drm_r128_private_t * dev_priv, int n);
148
149extern int r128_do_cce_idle(drm_r128_private_t * dev_priv);
150extern int r128_do_cleanup_cce(struct drm_device * dev);
151
152extern int r128_driver_vblank_wait(struct drm_device * dev, unsigned int *sequence);
153
154extern irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS);
155extern void r128_driver_irq_preinstall(struct drm_device * dev);
156extern void r128_driver_irq_postinstall(struct drm_device * dev);
157extern void r128_driver_irq_uninstall(struct drm_device * dev);
158extern void r128_driver_lastclose(struct drm_device * dev);
159extern void r128_driver_preclose(struct drm_device * dev,
160 struct drm_file *file_priv);
161
162extern long r128_compat_ioctl(struct file *filp, unsigned int cmd,
163 unsigned long arg);
164
165/* Register definitions, register access macros and drmAddMap constants
166 * for Rage 128 kernel driver.
167 */
168
169#define R128_AUX_SC_CNTL 0x1660
170# define R128_AUX1_SC_EN (1 << 0)
171# define R128_AUX1_SC_MODE_OR (0 << 1)
172# define R128_AUX1_SC_MODE_NAND (1 << 1)
173# define R128_AUX2_SC_EN (1 << 2)
174# define R128_AUX2_SC_MODE_OR (0 << 3)
175# define R128_AUX2_SC_MODE_NAND (1 << 3)
176# define R128_AUX3_SC_EN (1 << 4)
177# define R128_AUX3_SC_MODE_OR (0 << 5)
178# define R128_AUX3_SC_MODE_NAND (1 << 5)
179#define R128_AUX1_SC_LEFT 0x1664
180#define R128_AUX1_SC_RIGHT 0x1668
181#define R128_AUX1_SC_TOP 0x166c
182#define R128_AUX1_SC_BOTTOM 0x1670
183#define R128_AUX2_SC_LEFT 0x1674
184#define R128_AUX2_SC_RIGHT 0x1678
185#define R128_AUX2_SC_TOP 0x167c
186#define R128_AUX2_SC_BOTTOM 0x1680
187#define R128_AUX3_SC_LEFT 0x1684
188#define R128_AUX3_SC_RIGHT 0x1688
189#define R128_AUX3_SC_TOP 0x168c
190#define R128_AUX3_SC_BOTTOM 0x1690
191
192#define R128_BRUSH_DATA0 0x1480
193#define R128_BUS_CNTL 0x0030
194# define R128_BUS_MASTER_DIS (1 << 6)
195
196#define R128_CLOCK_CNTL_INDEX 0x0008
197#define R128_CLOCK_CNTL_DATA 0x000c
198# define R128_PLL_WR_EN (1 << 7)
199#define R128_CONSTANT_COLOR_C 0x1d34
200#define R128_CRTC_OFFSET 0x0224
201#define R128_CRTC_OFFSET_CNTL 0x0228
202# define R128_CRTC_OFFSET_FLIP_CNTL (1 << 16)
203
204#define R128_DP_GUI_MASTER_CNTL 0x146c
205# define R128_GMC_SRC_PITCH_OFFSET_CNTL (1 << 0)
206# define R128_GMC_DST_PITCH_OFFSET_CNTL (1 << 1)
207# define R128_GMC_BRUSH_SOLID_COLOR (13 << 4)
208# define R128_GMC_BRUSH_NONE (15 << 4)
209# define R128_GMC_DST_16BPP (4 << 8)
210# define R128_GMC_DST_24BPP (5 << 8)
211# define R128_GMC_DST_32BPP (6 << 8)
212# define R128_GMC_DST_DATATYPE_SHIFT 8
213# define R128_GMC_SRC_DATATYPE_COLOR (3 << 12)
214# define R128_DP_SRC_SOURCE_MEMORY (2 << 24)
215# define R128_DP_SRC_SOURCE_HOST_DATA (3 << 24)
216# define R128_GMC_CLR_CMP_CNTL_DIS (1 << 28)
217# define R128_GMC_AUX_CLIP_DIS (1 << 29)
218# define R128_GMC_WR_MSK_DIS (1 << 30)
219# define R128_ROP3_S 0x00cc0000
220# define R128_ROP3_P 0x00f00000
221#define R128_DP_WRITE_MASK 0x16cc
222#define R128_DST_PITCH_OFFSET_C 0x1c80
223# define R128_DST_TILE (1 << 31)
224
225#define R128_GEN_INT_CNTL 0x0040
226# define R128_CRTC_VBLANK_INT_EN (1 << 0)
227#define R128_GEN_INT_STATUS 0x0044
228# define R128_CRTC_VBLANK_INT (1 << 0)
229# define R128_CRTC_VBLANK_INT_AK (1 << 0)
230#define R128_GEN_RESET_CNTL 0x00f0
231# define R128_SOFT_RESET_GUI (1 << 0)
232
233#define R128_GUI_SCRATCH_REG0 0x15e0
234#define R128_GUI_SCRATCH_REG1 0x15e4
235#define R128_GUI_SCRATCH_REG2 0x15e8
236#define R128_GUI_SCRATCH_REG3 0x15ec
237#define R128_GUI_SCRATCH_REG4 0x15f0
238#define R128_GUI_SCRATCH_REG5 0x15f4
239
240#define R128_GUI_STAT 0x1740
241# define R128_GUI_FIFOCNT_MASK 0x0fff
242# define R128_GUI_ACTIVE (1 << 31)
243
244#define R128_MCLK_CNTL 0x000f
245# define R128_FORCE_GCP (1 << 16)
246# define R128_FORCE_PIPE3D_CP (1 << 17)
247# define R128_FORCE_RCP (1 << 18)
248
249#define R128_PC_GUI_CTLSTAT 0x1748
250#define R128_PC_NGUI_CTLSTAT 0x0184
251# define R128_PC_FLUSH_GUI (3 << 0)
252# define R128_PC_RI_GUI (1 << 2)
253# define R128_PC_FLUSH_ALL 0x00ff
254# define R128_PC_BUSY (1 << 31)
255
256#define R128_PCI_GART_PAGE 0x017c
257#define R128_PRIM_TEX_CNTL_C 0x1cb0
258
259#define R128_SCALE_3D_CNTL 0x1a00
260#define R128_SEC_TEX_CNTL_C 0x1d00
261#define R128_SEC_TEXTURE_BORDER_COLOR_C 0x1d3c
262#define R128_SETUP_CNTL 0x1bc4
263#define R128_STEN_REF_MASK_C 0x1d40
264
265#define R128_TEX_CNTL_C 0x1c9c
266# define R128_TEX_CACHE_FLUSH (1 << 23)
267
268#define R128_WAIT_UNTIL 0x1720
269# define R128_EVENT_CRTC_OFFSET (1 << 0)
270#define R128_WINDOW_XY_OFFSET 0x1bcc
271
272/* CCE registers
273 */
274#define R128_PM4_BUFFER_OFFSET 0x0700
275#define R128_PM4_BUFFER_CNTL 0x0704
276# define R128_PM4_MASK (15 << 28)
277# define R128_PM4_NONPM4 (0 << 28)
278# define R128_PM4_192PIO (1 << 28)
279# define R128_PM4_192BM (2 << 28)
280# define R128_PM4_128PIO_64INDBM (3 << 28)
281# define R128_PM4_128BM_64INDBM (4 << 28)
282# define R128_PM4_64PIO_128INDBM (5 << 28)
283# define R128_PM4_64BM_128INDBM (6 << 28)
284# define R128_PM4_64PIO_64VCBM_64INDBM (7 << 28)
285# define R128_PM4_64BM_64VCBM_64INDBM (8 << 28)
286# define R128_PM4_64PIO_64VCPIO_64INDPIO (15 << 28)
287# define R128_PM4_BUFFER_CNTL_NOUPDATE (1 << 27)
288
289#define R128_PM4_BUFFER_WM_CNTL 0x0708
290# define R128_WMA_SHIFT 0
291# define R128_WMB_SHIFT 8
292# define R128_WMC_SHIFT 16
293# define R128_WB_WM_SHIFT 24
294
295#define R128_PM4_BUFFER_DL_RPTR_ADDR 0x070c
296#define R128_PM4_BUFFER_DL_RPTR 0x0710
297#define R128_PM4_BUFFER_DL_WPTR 0x0714
298# define R128_PM4_BUFFER_DL_DONE (1 << 31)
299
300#define R128_PM4_VC_FPU_SETUP 0x071c
301
302#define R128_PM4_IW_INDOFF 0x0738
303#define R128_PM4_IW_INDSIZE 0x073c
304
305#define R128_PM4_STAT 0x07b8
306# define R128_PM4_FIFOCNT_MASK 0x0fff
307# define R128_PM4_BUSY (1 << 16)
308# define R128_PM4_GUI_ACTIVE (1 << 31)
309
310#define R128_PM4_MICROCODE_ADDR 0x07d4
311#define R128_PM4_MICROCODE_RADDR 0x07d8
312#define R128_PM4_MICROCODE_DATAH 0x07dc
313#define R128_PM4_MICROCODE_DATAL 0x07e0
314
315#define R128_PM4_BUFFER_ADDR 0x07f0
316#define R128_PM4_MICRO_CNTL 0x07fc
317# define R128_PM4_MICRO_FREERUN (1 << 30)
318
319#define R128_PM4_FIFO_DATA_EVEN 0x1000
320#define R128_PM4_FIFO_DATA_ODD 0x1004
321
322/* CCE command packets
323 */
324#define R128_CCE_PACKET0 0x00000000
325#define R128_CCE_PACKET1 0x40000000
326#define R128_CCE_PACKET2 0x80000000
327#define R128_CCE_PACKET3 0xC0000000
328# define R128_CNTL_HOSTDATA_BLT 0x00009400
329# define R128_CNTL_PAINT_MULTI 0x00009A00
330# define R128_CNTL_BITBLT_MULTI 0x00009B00
331# define R128_3D_RNDR_GEN_INDX_PRIM 0x00002300
332
333#define R128_CCE_PACKET_MASK 0xC0000000
334#define R128_CCE_PACKET_COUNT_MASK 0x3fff0000
335#define R128_CCE_PACKET0_REG_MASK 0x000007ff
336#define R128_CCE_PACKET1_REG0_MASK 0x000007ff
337#define R128_CCE_PACKET1_REG1_MASK 0x003ff800
338
339#define R128_CCE_VC_CNTL_PRIM_TYPE_NONE 0x00000000
340#define R128_CCE_VC_CNTL_PRIM_TYPE_POINT 0x00000001
341#define R128_CCE_VC_CNTL_PRIM_TYPE_LINE 0x00000002
342#define R128_CCE_VC_CNTL_PRIM_TYPE_POLY_LINE 0x00000003
343#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_LIST 0x00000004
344#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_FAN 0x00000005
345#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_STRIP 0x00000006
346#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_TYPE2 0x00000007
347#define R128_CCE_VC_CNTL_PRIM_WALK_IND 0x00000010
348#define R128_CCE_VC_CNTL_PRIM_WALK_LIST 0x00000020
349#define R128_CCE_VC_CNTL_PRIM_WALK_RING 0x00000030
350#define R128_CCE_VC_CNTL_NUM_SHIFT 16
351
352#define R128_DATATYPE_VQ 0
353#define R128_DATATYPE_CI4 1
354#define R128_DATATYPE_CI8 2
355#define R128_DATATYPE_ARGB1555 3
356#define R128_DATATYPE_RGB565 4
357#define R128_DATATYPE_RGB888 5
358#define R128_DATATYPE_ARGB8888 6
359#define R128_DATATYPE_RGB332 7
360#define R128_DATATYPE_Y8 8
361#define R128_DATATYPE_RGB8 9
362#define R128_DATATYPE_CI16 10
363#define R128_DATATYPE_YVYU422 11
364#define R128_DATATYPE_VYUY422 12
365#define R128_DATATYPE_AYUV444 14
366#define R128_DATATYPE_ARGB4444 15
367
368/* Constants */
369#define R128_AGP_OFFSET 0x02000000
370
371#define R128_WATERMARK_L 16
372#define R128_WATERMARK_M 8
373#define R128_WATERMARK_N 8
374#define R128_WATERMARK_K 128
375
376#define R128_MAX_USEC_TIMEOUT 100000 /* 100 ms */
377
378#define R128_LAST_FRAME_REG R128_GUI_SCRATCH_REG0
379#define R128_LAST_DISPATCH_REG R128_GUI_SCRATCH_REG1
380#define R128_MAX_VB_AGE 0x7fffffff
381#define R128_MAX_VB_VERTS (0xffff)
382
383#define R128_RING_HIGH_MARK 128
384
385#define R128_PERFORMANCE_BOXES 0
386
387#define R128_PCIGART_TABLE_SIZE 32768
388
389#define R128_READ(reg) DRM_READ32( dev_priv->mmio, (reg) )
390#define R128_WRITE(reg,val) DRM_WRITE32( dev_priv->mmio, (reg), (val) )
391#define R128_READ8(reg) DRM_READ8( dev_priv->mmio, (reg) )
392#define R128_WRITE8(reg,val) DRM_WRITE8( dev_priv->mmio, (reg), (val) )
393
394#define R128_WRITE_PLL(addr,val) \
395do { \
396 R128_WRITE8(R128_CLOCK_CNTL_INDEX, \
397 ((addr) & 0x1f) | R128_PLL_WR_EN); \
398 R128_WRITE(R128_CLOCK_CNTL_DATA, (val)); \
399} while (0)
400
401#define CCE_PACKET0( reg, n ) (R128_CCE_PACKET0 | \
402 ((n) << 16) | ((reg) >> 2))
403#define CCE_PACKET1( reg0, reg1 ) (R128_CCE_PACKET1 | \
404 (((reg1) >> 2) << 11) | ((reg0) >> 2))
405#define CCE_PACKET2() (R128_CCE_PACKET2)
406#define CCE_PACKET3( pkt, n ) (R128_CCE_PACKET3 | \
407 (pkt) | ((n) << 16))
408
409static __inline__ void r128_update_ring_snapshot(drm_r128_private_t * dev_priv)
410{
411 drm_r128_ring_buffer_t *ring = &dev_priv->ring;
412 ring->space = (GET_RING_HEAD(dev_priv) - ring->tail) * sizeof(u32);
413 if (ring->space <= 0)
414 ring->space += ring->size;
415}
416
417/* ================================================================
418 * Misc helper macros
419 */
420
421#define RING_SPACE_TEST_WITH_RETURN( dev_priv ) \
422do { \
423 drm_r128_ring_buffer_t *ring = &dev_priv->ring; int i; \
424 if ( ring->space < ring->high_mark ) { \
425 for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) { \
426 r128_update_ring_snapshot( dev_priv ); \
427 if ( ring->space >= ring->high_mark ) \
428 goto __ring_space_done; \
429 DRM_UDELAY(1); \
430 } \
431 DRM_ERROR( "ring space check failed!\n" ); \
432 return -EBUSY; \
433 } \
434 __ring_space_done: \
435 ; \
436} while (0)
437
438#define VB_AGE_TEST_WITH_RETURN( dev_priv ) \
439do { \
440 drm_r128_sarea_t *sarea_priv = dev_priv->sarea_priv; \
441 if ( sarea_priv->last_dispatch >= R128_MAX_VB_AGE ) { \
442 int __ret = r128_do_cce_idle( dev_priv ); \
443 if ( __ret ) return __ret; \
444 sarea_priv->last_dispatch = 0; \
445 r128_freelist_reset( dev ); \
446 } \
447} while (0)
448
449#define R128_WAIT_UNTIL_PAGE_FLIPPED() do { \
450 OUT_RING( CCE_PACKET0( R128_WAIT_UNTIL, 0 ) ); \
451 OUT_RING( R128_EVENT_CRTC_OFFSET ); \
452} while (0)
453
454/* ================================================================
455 * Ring control
456 */
457
458#define R128_VERBOSE 0
459
460#define RING_LOCALS \
461 int write, _nr; unsigned int tail_mask; volatile u32 *ring;
462
463#define BEGIN_RING( n ) do { \
464 if ( R128_VERBOSE ) { \
465 DRM_INFO( "BEGIN_RING( %d )\n", (n)); \
466 } \
467 if ( dev_priv->ring.space <= (n) * sizeof(u32) ) { \
468 COMMIT_RING(); \
469 r128_wait_ring( dev_priv, (n) * sizeof(u32) ); \
470 } \
471 _nr = n; dev_priv->ring.space -= (n) * sizeof(u32); \
472 ring = dev_priv->ring.start; \
473 write = dev_priv->ring.tail; \
474 tail_mask = dev_priv->ring.tail_mask; \
475} while (0)
476
477/* You can set this to zero if you want. If the card locks up, you'll
478 * need to keep this set. It works around a bug in early revs of the
479 * Rage 128 chipset, where the CCE would read 32 dwords past the end of
480 * the ring buffer before wrapping around.
481 */
482#define R128_BROKEN_CCE 1
483
484#define ADVANCE_RING() do { \
485 if ( R128_VERBOSE ) { \
486 DRM_INFO( "ADVANCE_RING() wr=0x%06x tail=0x%06x\n", \
487 write, dev_priv->ring.tail ); \
488 } \
489 if ( R128_BROKEN_CCE && write < 32 ) { \
490 memcpy( dev_priv->ring.end, \
491 dev_priv->ring.start, \
492 write * sizeof(u32) ); \
493 } \
494 if (((dev_priv->ring.tail + _nr) & tail_mask) != write) { \
495 DRM_ERROR( \
496 "ADVANCE_RING(): mismatch: nr: %x write: %x line: %d\n", \
497 ((dev_priv->ring.tail + _nr) & tail_mask), \
498 write, __LINE__); \
499 } else \
500 dev_priv->ring.tail = write; \
501} while (0)
502
503#define COMMIT_RING() do { \
504 if ( R128_VERBOSE ) { \
505 DRM_INFO( "COMMIT_RING() tail=0x%06x\n", \
506 dev_priv->ring.tail ); \
507 } \
508 DRM_MEMORYBARRIER(); \
509 R128_WRITE( R128_PM4_BUFFER_DL_WPTR, dev_priv->ring.tail ); \
510 R128_READ( R128_PM4_BUFFER_DL_WPTR ); \
511} while (0)
512
513#define OUT_RING( x ) do { \
514 if ( R128_VERBOSE ) { \
515 DRM_INFO( " OUT_RING( 0x%08x ) at 0x%x\n", \
516 (unsigned int)(x), write ); \
517 } \
518 ring[write++] = cpu_to_le32( x ); \
519 write &= tail_mask; \
520} while (0)
521
522#endif /* __R128_DRV_H__ */