1 | /*-*- linux-c -*- |
2 | * linux/drivers/video/i810_accel.c -- Hardware Acceleration |
3 | * |
4 | * Copyright (C) 2001 Antonino Daplas<adaplas@pol.net> |
5 | * All Rights Reserved |
6 | * |
7 | * This file is subject to the terms and conditions of the GNU General Public |
8 | * License. See the file COPYING in the main directory of this archive for |
9 | * more details. |
10 | */ |
11 | #include <linux/kernel.h> |
12 | #include <linux/string.h> |
13 | #include <linux/fb.h> |
14 | |
15 | #include "i810_regs.h" |
16 | #include "i810.h" |
17 | #include "i810_main.h" |
18 | |
19 | static u32 i810fb_rop[] = { |
20 | COLOR_COPY_ROP, /* ROP_COPY */ |
21 | XOR_ROP /* ROP_XOR */ |
22 | }; |
23 | |
24 | /* Macros */ |
25 | #define PUT_RING(n) { \ |
26 | i810_writel(par->cur_tail, par->iring.virtual, n); \ |
27 | par->cur_tail += 4; \ |
28 | par->cur_tail &= RING_SIZE_MASK; \ |
29 | } |
30 | |
31 | extern void flush_cache(void); |
32 | |
33 | /************************************************************/ |
34 | |
35 | /* BLT Engine Routines */ |
36 | static inline void i810_report_error(u8 __iomem *mmio) |
37 | { |
38 | printk("IIR : 0x%04x\n" |
39 | "EIR : 0x%04x\n" |
40 | "PGTBL_ER: 0x%04x\n" |
41 | "IPEIR : 0x%04x\n" |
42 | "IPEHR : 0x%04x\n" , |
43 | i810_readw(IIR, mmio), |
44 | i810_readb(EIR, mmio), |
45 | i810_readl(PGTBL_ER, mmio), |
46 | i810_readl(IPEIR, mmio), |
47 | i810_readl(IPEHR, mmio)); |
48 | } |
49 | |
50 | /** |
51 | * wait_for_space - check ring buffer free space |
52 | * @space: amount of ringbuffer space needed in bytes |
53 | * @par: pointer to i810fb_par structure |
54 | * |
55 | * DESCRIPTION: |
56 | * The function waits until a free space from the ringbuffer |
57 | * is available |
58 | */ |
59 | static inline int wait_for_space(struct fb_info *info, u32 space) |
60 | { |
61 | struct i810fb_par *par = info->par; |
62 | u32 head, count = WAIT_COUNT, tail; |
63 | u8 __iomem *mmio = par->mmio_start_virtual; |
64 | |
65 | tail = par->cur_tail; |
66 | while (count--) { |
67 | head = i810_readl(IRING + 4, mmio) & RBUFFER_HEAD_MASK; |
68 | if ((tail == head) || |
69 | (tail > head && |
70 | (par->iring.size - tail + head) >= space) || |
71 | (tail < head && (head - tail) >= space)) { |
72 | return 0; |
73 | } |
74 | } |
75 | printk("ringbuffer lockup!!!\n" ); |
76 | i810_report_error(mmio); |
77 | par->dev_flags |= LOCKUP; |
78 | info->pixmap.scan_align = 1; |
79 | return 1; |
80 | } |
81 | |
82 | /** |
83 | * wait_for_engine_idle - waits for all hardware engines to finish |
84 | * @par: pointer to i810fb_par structure |
85 | * |
86 | * DESCRIPTION: |
87 | * This waits for lring(0), iring(1), and batch(3), etc to finish and |
88 | * waits until ringbuffer is empty. |
89 | */ |
90 | static inline int wait_for_engine_idle(struct fb_info *info) |
91 | { |
92 | struct i810fb_par *par = info->par; |
93 | u8 __iomem *mmio = par->mmio_start_virtual; |
94 | int count = WAIT_COUNT; |
95 | |
96 | if (wait_for_space(info, space: par->iring.size)) /* flush */ |
97 | return 1; |
98 | |
99 | while((i810_readw(INSTDONE, mmio) & 0x7B) != 0x7B && --count); |
100 | if (count) return 0; |
101 | |
102 | printk("accel engine lockup!!!\n" ); |
103 | printk("INSTDONE: 0x%04x\n" , i810_readl(INSTDONE, mmio)); |
104 | i810_report_error(mmio); |
105 | par->dev_flags |= LOCKUP; |
106 | info->pixmap.scan_align = 1; |
107 | return 1; |
108 | } |
109 | |
110 | /* begin_iring - prepares the ringbuffer |
111 | * @space: length of sequence in dwords |
112 | * @par: pointer to i810fb_par structure |
113 | * |
114 | * DESCRIPTION: |
115 | * Checks/waits for sufficient space in ringbuffer of size |
116 | * space. Returns the tail of the buffer |
117 | */ |
118 | static inline u32 begin_iring(struct fb_info *info, u32 space) |
119 | { |
120 | struct i810fb_par *par = info->par; |
121 | |
122 | if (par->dev_flags & ALWAYS_SYNC) |
123 | wait_for_engine_idle(info); |
124 | return wait_for_space(info, space); |
125 | } |
126 | |
127 | /** |
128 | * end_iring - advances the buffer |
129 | * @par: pointer to i810fb_par structure |
130 | * |
131 | * DESCRIPTION: |
132 | * This advances the tail of the ringbuffer, effectively |
133 | * beginning the execution of the graphics instruction sequence. |
134 | */ |
135 | static inline void end_iring(struct i810fb_par *par) |
136 | { |
137 | u8 __iomem *mmio = par->mmio_start_virtual; |
138 | |
139 | i810_writel(IRING, mmio, par->cur_tail); |
140 | } |
141 | |
142 | /** |
143 | * source_copy_blit - BLIT transfer operation |
144 | * @dwidth: width of rectangular graphics data |
145 | * @dheight: height of rectangular graphics data |
146 | * @dpitch: bytes per line of destination buffer |
147 | * @xdir: direction of copy (left to right or right to left) |
148 | * @src: address of first pixel to read from |
149 | * @dest: address of first pixel to write to |
150 | * @from: source address |
151 | * @where: destination address |
152 | * @rop: raster operation |
153 | * @blit_bpp: pixel format which can be different from the |
154 | * framebuffer's pixelformat |
155 | * @par: pointer to i810fb_par structure |
156 | * |
157 | * DESCRIPTION: |
158 | * This is a BLIT operation typically used when doing |
159 | * a 'Copy and Paste' |
160 | */ |
161 | static inline void source_copy_blit(int dwidth, int dheight, int dpitch, |
162 | int xdir, int src, int dest, int rop, |
163 | int blit_bpp, struct fb_info *info) |
164 | { |
165 | struct i810fb_par *par = info->par; |
166 | |
167 | if (begin_iring(info, space: 24 + IRING_PAD)) return; |
168 | |
169 | PUT_RING(BLIT | SOURCE_COPY_BLIT | 4); |
170 | PUT_RING(xdir | rop << 16 | dpitch | DYN_COLOR_EN | blit_bpp); |
171 | PUT_RING(dheight << 16 | dwidth); |
172 | PUT_RING(dest); |
173 | PUT_RING(dpitch); |
174 | PUT_RING(src); |
175 | |
176 | end_iring(par); |
177 | } |
178 | |
179 | /** |
180 | * color_blit - solid color BLIT operation |
181 | * @width: width of destination |
182 | * @height: height of destination |
183 | * @pitch: pixels per line of the buffer |
184 | * @dest: address of first pixel to write to |
185 | * @where: destination |
186 | * @rop: raster operation |
187 | * @what: color to transfer |
188 | * @blit_bpp: pixel format which can be different from the |
189 | * framebuffer's pixelformat |
190 | * @par: pointer to i810fb_par structure |
191 | * |
192 | * DESCRIPTION: |
193 | * A BLIT operation which can be used for color fill/rectangular fill |
194 | */ |
195 | static inline void color_blit(int width, int height, int pitch, int dest, |
196 | int rop, int what, int blit_bpp, |
197 | struct fb_info *info) |
198 | { |
199 | struct i810fb_par *par = info->par; |
200 | |
201 | if (begin_iring(info, space: 24 + IRING_PAD)) return; |
202 | |
203 | PUT_RING(BLIT | COLOR_BLT | 3); |
204 | PUT_RING(rop << 16 | pitch | SOLIDPATTERN | DYN_COLOR_EN | blit_bpp); |
205 | PUT_RING(height << 16 | width); |
206 | PUT_RING(dest); |
207 | PUT_RING(what); |
208 | PUT_RING(NOP); |
209 | |
210 | end_iring(par); |
211 | } |
212 | |
213 | /** |
214 | * mono_src_copy_imm_blit - color expand from system memory to framebuffer |
215 | * @dwidth: width of destination |
216 | * @dheight: height of destination |
217 | * @dpitch: pixels per line of the buffer |
218 | * @dsize: size of bitmap in double words |
219 | * @dest: address of first byte of pixel; |
220 | * @rop: raster operation |
221 | * @blit_bpp: pixelformat to use which can be different from the |
222 | * framebuffer's pixelformat |
223 | * @src: address of image data |
224 | * @bg: backgound color |
225 | * @fg: forground color |
226 | * @par: pointer to i810fb_par structure |
227 | * |
228 | * DESCRIPTION: |
229 | * A color expand operation where the source data is placed in the |
230 | * ringbuffer itself. Useful for drawing text. |
231 | * |
232 | * REQUIREMENT: |
233 | * The end of a scanline must be padded to the next word. |
234 | */ |
235 | static inline void mono_src_copy_imm_blit(int dwidth, int dheight, int dpitch, |
236 | int dsize, int blit_bpp, int rop, |
237 | int dest, const u32 *src, int bg, |
238 | int fg, struct fb_info *info) |
239 | { |
240 | struct i810fb_par *par = info->par; |
241 | |
242 | if (begin_iring(info, space: 24 + (dsize << 2) + IRING_PAD)) return; |
243 | |
244 | PUT_RING(BLIT | MONO_SOURCE_COPY_IMMEDIATE | (4 + dsize)); |
245 | PUT_RING(DYN_COLOR_EN | blit_bpp | rop << 16 | dpitch); |
246 | PUT_RING(dheight << 16 | dwidth); |
247 | PUT_RING(dest); |
248 | PUT_RING(bg); |
249 | PUT_RING(fg); |
250 | while (dsize--) |
251 | PUT_RING(*src++); |
252 | |
253 | end_iring(par); |
254 | } |
255 | |
256 | static inline void load_front(int offset, struct fb_info *info) |
257 | { |
258 | struct i810fb_par *par = info->par; |
259 | |
260 | if (begin_iring(info, space: 8 + IRING_PAD)) return; |
261 | |
262 | PUT_RING(PARSER | FLUSH); |
263 | PUT_RING(NOP); |
264 | |
265 | end_iring(par); |
266 | |
267 | if (begin_iring(info, space: 8 + IRING_PAD)) return; |
268 | |
269 | PUT_RING(PARSER | FRONT_BUFFER | ((par->pitch >> 3) << 8)); |
270 | PUT_RING((par->fb.offset << 12) + offset); |
271 | |
272 | end_iring(par); |
273 | } |
274 | |
275 | /** |
276 | * i810fb_iring_enable - enables/disables the ringbuffer |
277 | * @mode: enable or disable |
278 | * @par: pointer to i810fb_par structure |
279 | * |
280 | * DESCRIPTION: |
281 | * Enables or disables the ringbuffer, effectively enabling or |
282 | * disabling the instruction/acceleration engine. |
283 | */ |
284 | static inline void i810fb_iring_enable(struct i810fb_par *par, u32 mode) |
285 | { |
286 | u32 tmp; |
287 | u8 __iomem *mmio = par->mmio_start_virtual; |
288 | |
289 | tmp = i810_readl(IRING + 12, mmio); |
290 | if (mode == OFF) |
291 | tmp &= ~1; |
292 | else |
293 | tmp |= 1; |
294 | flush_cache(); |
295 | i810_writel(IRING + 12, mmio, tmp); |
296 | } |
297 | |
298 | void i810fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) |
299 | { |
300 | struct i810fb_par *par = info->par; |
301 | u32 dx, dy, width, height, dest, rop = 0, color = 0; |
302 | |
303 | if (!info->var.accel_flags || par->dev_flags & LOCKUP || |
304 | par->depth == 4) { |
305 | cfb_fillrect(info, rect); |
306 | return; |
307 | } |
308 | |
309 | if (par->depth == 1) |
310 | color = rect->color; |
311 | else |
312 | color = ((u32 *) (info->pseudo_palette))[rect->color]; |
313 | |
314 | rop = i810fb_rop[rect->rop]; |
315 | |
316 | dx = rect->dx * par->depth; |
317 | width = rect->width * par->depth; |
318 | dy = rect->dy; |
319 | height = rect->height; |
320 | |
321 | dest = info->fix.smem_start + (dy * info->fix.line_length) + dx; |
322 | color_blit(width, height, pitch: info->fix.line_length, dest, rop, what: color, |
323 | blit_bpp: par->blit_bpp, info); |
324 | } |
325 | |
326 | void i810fb_copyarea(struct fb_info *info, const struct fb_copyarea *region) |
327 | { |
328 | struct i810fb_par *par = info->par; |
329 | u32 sx, sy, dx, dy, pitch, width, height, src, dest, xdir; |
330 | |
331 | if (!info->var.accel_flags || par->dev_flags & LOCKUP || |
332 | par->depth == 4) { |
333 | cfb_copyarea(info, area: region); |
334 | return; |
335 | } |
336 | |
337 | dx = region->dx * par->depth; |
338 | sx = region->sx * par->depth; |
339 | width = region->width * par->depth; |
340 | sy = region->sy; |
341 | dy = region->dy; |
342 | height = region->height; |
343 | |
344 | if (dx <= sx) { |
345 | xdir = INCREMENT; |
346 | } |
347 | else { |
348 | xdir = DECREMENT; |
349 | sx += width - 1; |
350 | dx += width - 1; |
351 | } |
352 | if (dy <= sy) { |
353 | pitch = info->fix.line_length; |
354 | } |
355 | else { |
356 | pitch = (-(info->fix.line_length)) & 0xFFFF; |
357 | sy += height - 1; |
358 | dy += height - 1; |
359 | } |
360 | src = info->fix.smem_start + (sy * info->fix.line_length) + sx; |
361 | dest = info->fix.smem_start + (dy * info->fix.line_length) + dx; |
362 | |
363 | source_copy_blit(dwidth: width, dheight: height, dpitch: pitch, xdir, src, dest, |
364 | PAT_COPY_ROP, blit_bpp: par->blit_bpp, info); |
365 | } |
366 | |
367 | void i810fb_imageblit(struct fb_info *info, const struct fb_image *image) |
368 | { |
369 | struct i810fb_par *par = info->par; |
370 | u32 fg = 0, bg = 0, size, dst; |
371 | |
372 | if (!info->var.accel_flags || par->dev_flags & LOCKUP || |
373 | par->depth == 4 || image->depth != 1) { |
374 | cfb_imageblit(info, image); |
375 | return; |
376 | } |
377 | |
378 | switch (info->var.bits_per_pixel) { |
379 | case 8: |
380 | fg = image->fg_color; |
381 | bg = image->bg_color; |
382 | break; |
383 | case 16: |
384 | case 24: |
385 | fg = ((u32 *)(info->pseudo_palette))[image->fg_color]; |
386 | bg = ((u32 *)(info->pseudo_palette))[image->bg_color]; |
387 | break; |
388 | } |
389 | |
390 | dst = info->fix.smem_start + (image->dy * info->fix.line_length) + |
391 | (image->dx * par->depth); |
392 | |
393 | size = (image->width+7)/8 + 1; |
394 | size &= ~1; |
395 | size *= image->height; |
396 | size += 7; |
397 | size &= ~7; |
398 | mono_src_copy_imm_blit(dwidth: image->width * par->depth, |
399 | dheight: image->height, dpitch: info->fix.line_length, |
400 | dsize: size/4, blit_bpp: par->blit_bpp, |
401 | PAT_COPY_ROP, dest: dst, src: (u32 *) image->data, |
402 | bg, fg, info); |
403 | } |
404 | |
405 | int i810fb_sync(struct fb_info *info) |
406 | { |
407 | struct i810fb_par *par = info->par; |
408 | |
409 | if (!info->var.accel_flags || par->dev_flags & LOCKUP) |
410 | return 0; |
411 | |
412 | return wait_for_engine_idle(info); |
413 | } |
414 | |
415 | void i810fb_load_front(u32 offset, struct fb_info *info) |
416 | { |
417 | struct i810fb_par *par = info->par; |
418 | u8 __iomem *mmio = par->mmio_start_virtual; |
419 | |
420 | if (!info->var.accel_flags || par->dev_flags & LOCKUP) |
421 | i810_writel(DPLYBASE, mmio, par->fb.physical + offset); |
422 | else |
423 | load_front(offset, info); |
424 | } |
425 | |
426 | /** |
427 | * i810fb_init_ringbuffer - initialize the ringbuffer |
428 | * @par: pointer to i810fb_par structure |
429 | * |
430 | * DESCRIPTION: |
431 | * Initializes the ringbuffer by telling the device the |
432 | * size and location of the ringbuffer. It also sets |
433 | * the head and tail pointers = 0 |
434 | */ |
435 | void i810fb_init_ringbuffer(struct fb_info *info) |
436 | { |
437 | struct i810fb_par *par = info->par; |
438 | u32 tmp1, tmp2; |
439 | u8 __iomem *mmio = par->mmio_start_virtual; |
440 | |
441 | wait_for_engine_idle(info); |
442 | i810fb_iring_enable(par, OFF); |
443 | i810_writel(IRING, mmio, 0); |
444 | i810_writel(IRING + 4, mmio, 0); |
445 | par->cur_tail = 0; |
446 | |
447 | tmp2 = i810_readl(IRING + 8, mmio) & ~RBUFFER_START_MASK; |
448 | tmp1 = par->iring.physical; |
449 | i810_writel(IRING + 8, mmio, tmp2 | tmp1); |
450 | |
451 | tmp1 = i810_readl(IRING + 12, mmio); |
452 | tmp1 &= ~RBUFFER_SIZE_MASK; |
453 | tmp2 = (par->iring.size - I810_PAGESIZE) & RBUFFER_SIZE_MASK; |
454 | i810_writel(IRING + 12, mmio, tmp1 | tmp2); |
455 | i810fb_iring_enable(par, ON); |
456 | } |
457 | |