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Import 2.4.0-test2pre7
[davej-history.git] / drivers / char / drm / ffb_context.c
bloba10b598985b51aebb2800ecacc60fdd3c5f68103
1 /* $Id: ffb_context.c,v 1.3 2000/06/09 03:46:53 davem Exp $
2 * ffb_context.c: Creator/Creator3D DRI/DRM context switching.
3 *
4 * Copyright (C) 2000 David S. Miller (davem@redhat.com)
5 *
6 * Almost entirely stolen from tdfx_context.c, see there
7 * for authors.
8 */
9
10 #include <linux/sched.h>
11 #include <asm/upa.h>
12
13 #include "drmP.h"
14
15 #include "ffb_drv.h"
16
17 static int ffb_alloc_queue(drm_device_t *dev, int is_2d_only)
18 {
19 ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
20 int i;
21
22 for (i = 0; i < FFB_MAX_CTXS; i++) {
23 if (fpriv->hw_state[i] == NULL)
24 break;
25 }
26 if (i == FFB_MAX_CTXS)
27 return -1;
28
29 fpriv->hw_state[i] = kmalloc(sizeof(struct ffb_hw_context), GFP_KERNEL);
30 if (fpriv->hw_state[i] == NULL)
31 return -1;
32
33 fpriv->hw_state[i]->is_2d_only = is_2d_only;
34
35 /* Plus one because 0 is the special DRM_KERNEL_CONTEXT. */
36 return i + 1;
37 }
38
39 static void ffb_save_context(ffb_dev_priv_t *fpriv, int idx)
40 {
41 ffb_fbcPtr ffb = fpriv->regs;
42 struct ffb_hw_context *ctx;
43 int i;
44
45 ctx = fpriv->hw_state[idx - 1];
46 if (idx == 0 || ctx == NULL)
47 return;
48
49 if (ctx->is_2d_only) {
50 /* 2D applications only care about certain pieces
51 * of state.
52 */
53 ctx->drawop = upa_readl(&ffb->drawop);
54 ctx->ppc = upa_readl(&ffb->ppc);
55 ctx->wid = upa_readl(&ffb->wid);
56 ctx->fg = upa_readl(&ffb->fg);
57 ctx->bg = upa_readl(&ffb->bg);
58 ctx->xclip = upa_readl(&ffb->xclip);
59 ctx->fbc = upa_readl(&ffb->fbc);
60 ctx->rop = upa_readl(&ffb->rop);
61 ctx->cmp = upa_readl(&ffb->cmp);
62 ctx->matchab = upa_readl(&ffb->matchab);
63 ctx->magnab = upa_readl(&ffb->magnab);
64 ctx->pmask = upa_readl(&ffb->pmask);
65 ctx->xpmask = upa_readl(&ffb->xpmask);
66 ctx->lpat = upa_readl(&ffb->lpat);
67 ctx->fontxy = upa_readl(&ffb->fontxy);
68 ctx->fontw = upa_readl(&ffb->fontw);
69 ctx->fontinc = upa_readl(&ffb->fontinc);
70
71 /* stencil/stencilctl only exists on FFB2+ and later
72 * due to the introduction of 3DRAM-III.
73 */
74 if (fpriv->ffb_type == ffb2_vertical_plus ||
75 fpriv->ffb_type == ffb2_horizontal_plus) {
76 ctx->stencil = upa_readl(&ffb->stencil);
77 ctx->stencilctl = upa_readl(&ffb->stencilctl);
78 }
79
80 for (i = 0; i < 32; i++)
81 ctx->area_pattern[i] = upa_readl(&ffb->pattern[i]);
82 ctx->ucsr = upa_readl(&ffb->ucsr);
83 return;
84 }
85
86 /* Fetch drawop. */
87 ctx->drawop = upa_readl(&ffb->drawop);
88
89 /* If we were saving the vertex registers, this is where
90 * we would do it. We would save 32 32-bit words starting
91 * at ffb->suvtx.
92 */
93
94 /* Capture rendering attributes. */
95
96 ctx->ppc = upa_readl(&ffb->ppc); /* Pixel Processor Control */
97 ctx->wid = upa_readl(&ffb->wid); /* Current WID */
98 ctx->fg = upa_readl(&ffb->fg); /* Constant FG color */
99 ctx->bg = upa_readl(&ffb->bg); /* Constant BG color */
100 ctx->consty = upa_readl(&ffb->consty); /* Constant Y */
101 ctx->constz = upa_readl(&ffb->constz); /* Constant Z */
102 ctx->xclip = upa_readl(&ffb->xclip); /* X plane clip */
103 ctx->dcss = upa_readl(&ffb->dcss); /* Depth Cue Scale Slope */
104 ctx->vclipmin = upa_readl(&ffb->vclipmin); /* Primary XY clip, minimum */
105 ctx->vclipmax = upa_readl(&ffb->vclipmax); /* Primary XY clip, maximum */
106 ctx->vclipzmin = upa_readl(&ffb->vclipzmin); /* Primary Z clip, minimum */
107 ctx->vclipzmax = upa_readl(&ffb->vclipzmax); /* Primary Z clip, maximum */
108 ctx->dcsf = upa_readl(&ffb->dcsf); /* Depth Cue Scale Front Bound */
109 ctx->dcsb = upa_readl(&ffb->dcsb); /* Depth Cue Scale Back Bound */
110 ctx->dczf = upa_readl(&ffb->dczf); /* Depth Cue Scale Z Front */
111 ctx->dczb = upa_readl(&ffb->dczb); /* Depth Cue Scale Z Back */
112 ctx->blendc = upa_readl(&ffb->blendc); /* Alpha Blend Control */
113 ctx->blendc1 = upa_readl(&ffb->blendc1); /* Alpha Blend Color 1 */
114 ctx->blendc2 = upa_readl(&ffb->blendc2); /* Alpha Blend Color 2 */
115 ctx->fbc = upa_readl(&ffb->fbc); /* Frame Buffer Control */
116 ctx->rop = upa_readl(&ffb->rop); /* Raster Operation */
117 ctx->cmp = upa_readl(&ffb->cmp); /* Compare Controls */
118 ctx->matchab = upa_readl(&ffb->matchab); /* Buffer A/B Match Ops */
119 ctx->matchc = upa_readl(&ffb->matchc); /* Buffer C Match Ops */
120 ctx->magnab = upa_readl(&ffb->magnab); /* Buffer A/B Magnitude Ops */
121 ctx->magnc = upa_readl(&ffb->magnc); /* Buffer C Magnitude Ops */
122 ctx->pmask = upa_readl(&ffb->pmask); /* RGB Plane Mask */
123 ctx->xpmask = upa_readl(&ffb->xpmask); /* X Plane Mask */
124 ctx->ypmask = upa_readl(&ffb->ypmask); /* Y Plane Mask */
125 ctx->zpmask = upa_readl(&ffb->zpmask); /* Z Plane Mask */
126
127 /* Auxiliary Clips. */
128 ctx->auxclip0min = upa_readl(&ffb->auxclip[0].min);
129 ctx->auxclip0max = upa_readl(&ffb->auxclip[0].max);
130 ctx->auxclip1min = upa_readl(&ffb->auxclip[1].min);
131 ctx->auxclip1max = upa_readl(&ffb->auxclip[1].max);
132 ctx->auxclip2min = upa_readl(&ffb->auxclip[2].min);
133 ctx->auxclip2max = upa_readl(&ffb->auxclip[2].max);
134 ctx->auxclip3min = upa_readl(&ffb->auxclip[3].min);
135 ctx->auxclip3max = upa_readl(&ffb->auxclip[3].max);
136
137 ctx->lpat = upa_readl(&ffb->lpat); /* Line Pattern */
138 ctx->fontxy = upa_readl(&ffb->fontxy); /* XY Font Coordinate */
139 ctx->fontw = upa_readl(&ffb->fontw); /* Font Width */
140 ctx->fontinc = upa_readl(&ffb->fontinc); /* Font X/Y Increment */
141
142 /* These registers/features only exist on FFB2 and later chips. */
143 if (fpriv->ffb_type >= ffb2_prototype) {
144 ctx->dcss1 = upa_readl(&ffb->dcss1); /* Depth Cue Scale Slope 1 */
145 ctx->dcss2 = upa_readl(&ffb->dcss2); /* Depth Cue Scale Slope 2 */
146 ctx->dcss2 = upa_readl(&ffb->dcss3); /* Depth Cue Scale Slope 3 */
147 ctx->dcs2 = upa_readl(&ffb->dcs2); /* Depth Cue Scale 2 */
148 ctx->dcs3 = upa_readl(&ffb->dcs3); /* Depth Cue Scale 3 */
149 ctx->dcs4 = upa_readl(&ffb->dcs4); /* Depth Cue Scale 4 */
150 ctx->dcd2 = upa_readl(&ffb->dcd2); /* Depth Cue Depth 2 */
151 ctx->dcd3 = upa_readl(&ffb->dcd3); /* Depth Cue Depth 3 */
152 ctx->dcd4 = upa_readl(&ffb->dcd4); /* Depth Cue Depth 4 */
153
154 /* And stencil/stencilctl only exists on FFB2+ and later
155 * due to the introduction of 3DRAM-III.
156 */
157 if (fpriv->ffb_type == ffb2_vertical_plus ||
158 fpriv->ffb_type == ffb2_horizontal_plus) {
159 ctx->stencil = upa_readl(&ffb->stencil);
160 ctx->stencilctl = upa_readl(&ffb->stencilctl);
161 }
162 }
163
164 /* Save the 32x32 area pattern. */
165 for (i = 0; i < 32; i++)
166 ctx->area_pattern[i] = upa_readl(&ffb->pattern[i]);
167
168 /* Finally, stash away the User Constol/Status Register. */
169 ctx->ucsr = upa_readl(&ffb->ucsr);
170 }
171
172 static void ffb_restore_context(ffb_dev_priv_t *fpriv, int old, int idx)
173 {
174 ffb_fbcPtr ffb = fpriv->regs;
175 struct ffb_hw_context *ctx;
176 int i;
177
178 ctx = fpriv->hw_state[idx - 1];
179 if (idx == 0 || ctx == NULL)
180 return;
181
182 if (ctx->is_2d_only) {
183 /* 2D applications only care about certain pieces
184 * of state.
185 */
186 upa_writel(ctx->drawop, &ffb->drawop);
187
188 /* If we were restoring the vertex registers, this is where
189 * we would do it. We would restore 32 32-bit words starting
190 * at ffb->suvtx.
191 */
192
193 upa_writel(ctx->ppc, &ffb->ppc);
194 upa_writel(ctx->wid, &ffb->wid);
195 upa_writel(ctx->fg, &ffb->fg);
196 upa_writel(ctx->bg, &ffb->bg);
197 upa_writel(ctx->xclip, &ffb->xclip);
198 upa_writel(ctx->fbc, &ffb->fbc);
199 upa_writel(ctx->rop, &ffb->rop);
200 upa_writel(ctx->cmp, &ffb->cmp);
201 upa_writel(ctx->matchab, &ffb->matchab);
202 upa_writel(ctx->magnab, &ffb->magnab);
203 upa_writel(ctx->pmask, &ffb->pmask);
204 upa_writel(ctx->xpmask, &ffb->xpmask);
205 upa_writel(ctx->lpat, &ffb->lpat);
206 upa_writel(ctx->fontxy, &ffb->fontxy);
207 upa_writel(ctx->fontw, &ffb->fontw);
208 upa_writel(ctx->fontinc, &ffb->fontinc);
209
210 /* stencil/stencilctl only exists on FFB2+ and later
211 * due to the introduction of 3DRAM-III.
212 */
213 if (fpriv->ffb_type == ffb2_vertical_plus ||
214 fpriv->ffb_type == ffb2_horizontal_plus) {
215 upa_writel(ctx->stencil, &ffb->stencil);
216 upa_writel(ctx->stencilctl, &ffb->stencilctl);
217 upa_writel(0x80000000, &ffb->fbc);
218 upa_writel((ctx->stencilctl | 0x80000),
219 &ffb->rawstencilctl);
220 upa_writel(ctx->fbc, &ffb->fbc);
221 }
222
223 for (i = 0; i < 32; i++)
224 upa_writel(ctx->area_pattern[i], &ffb->pattern[i]);
225 upa_writel((ctx->ucsr & 0xf0000), &ffb->ucsr);
226 return;
227 }
228
229 /* Restore drawop. */
230 upa_writel(ctx->drawop, &ffb->drawop);
231
232 /* If we were restoring the vertex registers, this is where
233 * we would do it. We would restore 32 32-bit words starting
234 * at ffb->suvtx.
235 */
236
237 /* Restore rendering attributes. */
238
239 upa_writel(ctx->ppc, &ffb->ppc); /* Pixel Processor Control */
240 upa_writel(ctx->wid, &ffb->wid); /* Current WID */
241 upa_writel(ctx->fg, &ffb->fg); /* Constant FG color */
242 upa_writel(ctx->bg, &ffb->bg); /* Constant BG color */
243 upa_writel(ctx->consty, &ffb->consty); /* Constant Y */
244 upa_writel(ctx->constz, &ffb->constz); /* Constant Z */
245 upa_writel(ctx->xclip, &ffb->xclip); /* X plane clip */
246 upa_writel(ctx->dcss, &ffb->dcss); /* Depth Cue Scale Slope */
247 upa_writel(ctx->vclipmin, &ffb->vclipmin); /* Primary XY clip, minimum */
248 upa_writel(ctx->vclipmax, &ffb->vclipmax); /* Primary XY clip, maximum */
249 upa_writel(ctx->vclipzmin, &ffb->vclipzmin); /* Primary Z clip, minimum */
250 upa_writel(ctx->vclipzmax, &ffb->vclipzmax); /* Primary Z clip, maximum */
251 upa_writel(ctx->dcsf, &ffb->dcsf); /* Depth Cue Scale Front Bound */
252 upa_writel(ctx->dcsb, &ffb->dcsb); /* Depth Cue Scale Back Bound */
253 upa_writel(ctx->dczf, &ffb->dczf); /* Depth Cue Scale Z Front */
254 upa_writel(ctx->dczb, &ffb->dczb); /* Depth Cue Scale Z Back */
255 upa_writel(ctx->blendc, &ffb->blendc); /* Alpha Blend Control */
256 upa_writel(ctx->blendc1, &ffb->blendc1); /* Alpha Blend Color 1 */
257 upa_writel(ctx->blendc2, &ffb->blendc2); /* Alpha Blend Color 2 */
258 upa_writel(ctx->fbc, &ffb->fbc); /* Frame Buffer Control */
259 upa_writel(ctx->rop, &ffb->rop); /* Raster Operation */
260 upa_writel(ctx->cmp, &ffb->cmp); /* Compare Controls */
261 upa_writel(ctx->matchab, &ffb->matchab); /* Buffer A/B Match Ops */
262 upa_writel(ctx->matchc, &ffb->matchc); /* Buffer C Match Ops */
263 upa_writel(ctx->magnab, &ffb->magnab); /* Buffer A/B Magnitude Ops */
264 upa_writel(ctx->magnc, &ffb->magnc); /* Buffer C Magnitude Ops */
265 upa_writel(ctx->pmask, &ffb->pmask); /* RGB Plane Mask */
266 upa_writel(ctx->xpmask, &ffb->xpmask); /* X Plane Mask */
267 upa_writel(ctx->ypmask, &ffb->ypmask); /* Y Plane Mask */
268 upa_writel(ctx->zpmask, &ffb->zpmask); /* Z Plane Mask */
269
270 /* Auxiliary Clips. */
271 upa_writel(ctx->auxclip0min, &ffb->auxclip[0].min);
272 upa_writel(ctx->auxclip0max, &ffb->auxclip[0].max);
273 upa_writel(ctx->auxclip1min, &ffb->auxclip[1].min);
274 upa_writel(ctx->auxclip1max, &ffb->auxclip[1].max);
275 upa_writel(ctx->auxclip2min, &ffb->auxclip[2].min);
276 upa_writel(ctx->auxclip2max, &ffb->auxclip[2].max);
277 upa_writel(ctx->auxclip3min, &ffb->auxclip[3].min);
278 upa_writel(ctx->auxclip3max, &ffb->auxclip[3].max);
279
280 upa_writel(ctx->lpat, &ffb->lpat); /* Line Pattern */
281 upa_writel(ctx->fontxy, &ffb->fontxy); /* XY Font Coordinate */
282 upa_writel(ctx->fontw, &ffb->fontw); /* Font Width */
283 upa_writel(ctx->fontinc, &ffb->fontinc); /* Font X/Y Increment */
284
285 /* These registers/features only exist on FFB2 and later chips. */
286 if (fpriv->ffb_type >= ffb2_prototype) {
287 upa_writel(ctx->dcss1, &ffb->dcss1); /* Depth Cue Scale Slope 1 */
288 upa_writel(ctx->dcss2, &ffb->dcss2); /* Depth Cue Scale Slope 2 */
289 upa_writel(ctx->dcss3, &ffb->dcss2); /* Depth Cue Scale Slope 3 */
290 upa_writel(ctx->dcs2, &ffb->dcs2); /* Depth Cue Scale 2 */
291 upa_writel(ctx->dcs3, &ffb->dcs3); /* Depth Cue Scale 3 */
292 upa_writel(ctx->dcs4, &ffb->dcs4); /* Depth Cue Scale 4 */
293 upa_writel(ctx->dcd2, &ffb->dcd2); /* Depth Cue Depth 2 */
294 upa_writel(ctx->dcd3, &ffb->dcd3); /* Depth Cue Depth 3 */
295 upa_writel(ctx->dcd4, &ffb->dcd4); /* Depth Cue Depth 4 */
296
297 /* And stencil/stencilctl only exists on FFB2+ and later
298 * due to the introduction of 3DRAM-III.
299 */
300 if (fpriv->ffb_type == ffb2_vertical_plus ||
301 fpriv->ffb_type == ffb2_horizontal_plus) {
302 /* Unfortunately, there is a hardware bug on
303 * the FFB2+ chips which prevents a normal write
304 * to the stencil control register from working
305 * as it should.
306 *
307 * The state controlled by the FFB stencilctl register
308 * really gets transferred to the per-buffer instances
309 * of the stencilctl register in the 3DRAM chips.
310 *
311 * The bug is that FFB does not update buffer C correctly,
312 * so we have to do it by hand for them.
313 */
314
315 /* This will update buffers A and B. */
316 upa_writel(ctx->stencil, &ffb->stencil);
317 upa_writel(ctx->stencilctl, &ffb->stencilctl);
318
319 /* Force FFB to use buffer C 3dram regs. */
320 upa_writel(0x80000000, &ffb->fbc);
321 upa_writel((ctx->stencilctl | 0x80000),
322 &ffb->rawstencilctl);
323
324 /* Now restore the correct FBC controls. */
325 upa_writel(ctx->fbc, &ffb->fbc);
326 }
327 }
328
329 /* Restore the 32x32 area pattern. */
330 for (i = 0; i < 32; i++)
331 upa_writel(ctx->area_pattern[i], &ffb->pattern[i]);
332
333 /* Finally, stash away the User Constol/Status Register.
334 * The only state we really preserve here is the picking
335 * control.
336 */
337 upa_writel((ctx->ucsr & 0xf0000), &ffb->ucsr);
338 }
339
340 #define FFB_UCSR_FB_BUSY 0x01000000
341 #define FFB_UCSR_RP_BUSY 0x02000000
342 #define FFB_UCSR_ALL_BUSY (FFB_UCSR_RP_BUSY|FFB_UCSR_FB_BUSY)
343
344 static void FFBWait(ffb_fbcPtr ffb)
345 {
346 int limit = 100000;
347
348 do {
349 u32 regval = upa_readl(&ffb->ucsr);
350
351 if ((regval & FFB_UCSR_ALL_BUSY) == 0)
352 break;
353 } while (--limit);
354 }
355
356 int ffb_context_switch(drm_device_t *dev, int old, int new)
357 {
358 ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
359
360 atomic_inc(&dev->total_ctx);
361
362 #if DRM_DMA_HISTOGRAM
363 dev->ctx_start = get_cycles();
364 #endif
365
366 DRM_DEBUG("Context switch from %d to %d\n", old, new);
367
368 if (new == dev->last_context ||
369 dev->last_context == 0) {
370 dev->last_context = new;
371 return 0;
372 }
373
374 FFBWait(fpriv->regs);
375 ffb_save_context(fpriv, old);
376 ffb_restore_context(fpriv, old, new);
377 FFBWait(fpriv->regs);
378
379 dev->last_context = new;
380
381 return 0;
382 }
383
384 int ffb_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
385 unsigned long arg)
386 {
387 drm_ctx_res_t res;
388 drm_ctx_t ctx;
389 int i;
390
391 DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
392 copy_from_user_ret(&res, (drm_ctx_res_t *)arg, sizeof(res), -EFAULT);
393 if (res.count >= DRM_RESERVED_CONTEXTS) {
394 memset(&ctx, 0, sizeof(ctx));
395 for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
396 ctx.handle = i;
397 copy_to_user_ret(&res.contexts[i],
398 &i,
399 sizeof(i),
400 -EFAULT);
401 }
402 }
403 res.count = DRM_RESERVED_CONTEXTS;
404 copy_to_user_ret((drm_ctx_res_t *)arg, &res, sizeof(res), -EFAULT);
405 return 0;
406 }
407
408
409 int ffb_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
410 unsigned long arg)
411 {
412 drm_file_t *priv = filp->private_data;
413 drm_device_t *dev = priv->dev;
414 drm_ctx_t ctx;
415 int idx;
416
417 copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
418 idx = ffb_alloc_queue(dev, (ctx.flags & _DRM_CONTEXT_2DONLY));
419 if (idx < 0)
420 return -ENFILE;
421
422 DRM_DEBUG("%d\n", ctx.handle);
423 ctx.handle = idx;
424 copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
425 return 0;
426 }
427
428 int ffb_modctx(struct inode *inode, struct file *filp, unsigned int cmd,
429 unsigned long arg)
430 {
431 drm_file_t *priv = filp->private_data;
432 drm_device_t *dev = priv->dev;
433 ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
434 struct ffb_hw_context *hwctx;
435 drm_ctx_t ctx;
436 int idx;
437
438 copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
439
440 idx = ctx.handle;
441 if (idx <= 0 || idx >= FFB_MAX_CTXS)
442 return -EINVAL;
443
444 hwctx = fpriv->hw_state[idx - 1];
445 if (hwctx == NULL)
446 return -EINVAL;
447
448 if ((ctx.flags & _DRM_CONTEXT_2DONLY) == 0)
449 hwctx->is_2d_only = 0;
450 else
451 hwctx->is_2d_only = 1;
452
453 return 0;
454 }
455
456 int ffb_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
457 unsigned long arg)
458 {
459 drm_file_t *priv = filp->private_data;
460 drm_device_t *dev = priv->dev;
461 ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
462 struct ffb_hw_context *hwctx;
463 drm_ctx_t ctx;
464 int idx;
465
466 copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
467
468 idx = ctx.handle;
469 if (idx <= 0 || idx >= FFB_MAX_CTXS)
470 return -EINVAL;
471
472 hwctx = fpriv->hw_state[idx - 1];
473 if (hwctx == NULL)
474 return -EINVAL;
475
476 if (hwctx->is_2d_only != 0)
477 ctx.flags = _DRM_CONTEXT_2DONLY;
478 else
479 ctx.flags = 0;
480
481 copy_to_user_ret((drm_ctx_t*)arg, &ctx, sizeof(ctx), -EFAULT);
482
483 return 0;
484 }
485
486 int ffb_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
487 unsigned long arg)
488 {
489 drm_file_t *priv = filp->private_data;
490 drm_device_t *dev = priv->dev;
491 drm_ctx_t ctx;
492
493 copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
494 DRM_DEBUG("%d\n", ctx.handle);
495 return ffb_context_switch(dev, dev->last_context, ctx.handle);
496 }
497
498 int ffb_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
499 unsigned long arg)
500 {
501 drm_ctx_t ctx;
502
503 copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
504 DRM_DEBUG("%d\n", ctx.handle);
505
506 return 0;
507 }
508
509 int ffb_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
510 unsigned long arg)
511 {
512 drm_ctx_t ctx;
513 drm_file_t *priv = filp->private_data;
514 drm_device_t *dev = priv->dev;
515 ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) (dev + 1);
516 int idx;
517
518 copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
519 DRM_DEBUG("%d\n", ctx.handle);
520
521 idx = ctx.handle - 1;
522 if (idx < 0 || idx >= FFB_MAX_CTXS)
523 return -EINVAL;
524
525 if (fpriv->hw_state[idx] != NULL) {
526 kfree(fpriv->hw_state[idx]);
527 fpriv->hw_state[idx] = NULL;
528 }
529 return 0;
530 }
Copy of Dave Jones history.git as used by http://archive.org/details/git-history-of-linux