blob: 1a584e077c61fa36b00f0dc273b600a87ea1b726 [file] [log] [blame]
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -08001/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -07002 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15 * 02110-1301, USA.
16 */
17
18#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/platform_device.h>
22#include <linux/errno.h>
23#include <linux/io.h>
24#include <linux/interrupt.h>
25#include <linux/list.h>
26#include <linux/spinlock.h>
27#include <linux/slab.h>
28#include <linux/iommu.h>
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -080029#include <linux/clk.h>
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -070030
31#include <asm/cacheflush.h>
32#include <asm/sizes.h>
33
34#include <mach/iommu_hw-8xxx.h>
35#include <mach/iommu.h>
36
Stepan Moskovchenko100832c2010-11-15 18:20:08 -080037#define MRC(reg, processor, op1, crn, crm, op2) \
38__asm__ __volatile__ ( \
39" mrc " #processor "," #op1 ", %0," #crn "," #crm "," #op2 "\n" \
40: "=r" (reg))
41
42#define RCP15_PRRR(reg) MRC(reg, p15, 0, c10, c2, 0)
43#define RCP15_NMRR(reg) MRC(reg, p15, 0, c10, c2, 1)
44
45static int msm_iommu_tex_class[4];
46
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -070047DEFINE_SPINLOCK(msm_iommu_lock);
48
49struct msm_priv {
50 unsigned long *pgtable;
51 struct list_head list_attached;
52};
53
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -080054static int __enable_clocks(struct msm_iommu_drvdata *drvdata)
55{
56 int ret;
57
58 ret = clk_enable(drvdata->pclk);
59 if (ret)
60 goto fail;
61
62 if (drvdata->clk) {
63 ret = clk_enable(drvdata->clk);
64 if (ret)
65 clk_disable(drvdata->pclk);
66 }
67fail:
68 return ret;
69}
70
71static void __disable_clocks(struct msm_iommu_drvdata *drvdata)
72{
73 if (drvdata->clk)
74 clk_disable(drvdata->clk);
75 clk_disable(drvdata->pclk);
76}
77
Stepan Moskovchenko33069732010-11-12 19:30:00 -080078static int __flush_iotlb(struct iommu_domain *domain)
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -070079{
80 struct msm_priv *priv = domain->priv;
81 struct msm_iommu_drvdata *iommu_drvdata;
82 struct msm_iommu_ctx_drvdata *ctx_drvdata;
Stepan Moskovchenko33069732010-11-12 19:30:00 -080083 int ret = 0;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -070084#ifndef CONFIG_IOMMU_PGTABLES_L2
85 unsigned long *fl_table = priv->pgtable;
86 int i;
87
Stepan Moskovchenkof6f41eb2010-11-12 19:29:54 -080088 if (!list_empty(&priv->list_attached)) {
89 dmac_flush_range(fl_table, fl_table + SZ_16K);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -070090
Stepan Moskovchenkof6f41eb2010-11-12 19:29:54 -080091 for (i = 0; i < NUM_FL_PTE; i++)
92 if ((fl_table[i] & 0x03) == FL_TYPE_TABLE) {
93 void *sl_table = __va(fl_table[i] &
94 FL_BASE_MASK);
95 dmac_flush_range(sl_table, sl_table + SZ_4K);
96 }
97 }
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -070098#endif
99
100 list_for_each_entry(ctx_drvdata, &priv->list_attached, attached_elm) {
101 if (!ctx_drvdata->pdev || !ctx_drvdata->pdev->dev.parent)
102 BUG();
103
104 iommu_drvdata = dev_get_drvdata(ctx_drvdata->pdev->dev.parent);
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800105 BUG_ON(!iommu_drvdata);
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800106
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800107 ret = __enable_clocks(iommu_drvdata);
108 if (ret)
109 goto fail;
110
111 SET_CTX_TLBIALL(iommu_drvdata->base, ctx_drvdata->num, 0);
112 __disable_clocks(iommu_drvdata);
113 }
114fail:
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800115 return ret;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700116}
117
118static void __reset_context(void __iomem *base, int ctx)
119{
120 SET_BPRCOSH(base, ctx, 0);
121 SET_BPRCISH(base, ctx, 0);
122 SET_BPRCNSH(base, ctx, 0);
123 SET_BPSHCFG(base, ctx, 0);
124 SET_BPMTCFG(base, ctx, 0);
125 SET_ACTLR(base, ctx, 0);
126 SET_SCTLR(base, ctx, 0);
127 SET_FSRRESTORE(base, ctx, 0);
128 SET_TTBR0(base, ctx, 0);
129 SET_TTBR1(base, ctx, 0);
130 SET_TTBCR(base, ctx, 0);
131 SET_BFBCR(base, ctx, 0);
132 SET_PAR(base, ctx, 0);
133 SET_FAR(base, ctx, 0);
134 SET_CTX_TLBIALL(base, ctx, 0);
135 SET_TLBFLPTER(base, ctx, 0);
136 SET_TLBSLPTER(base, ctx, 0);
137 SET_TLBLKCR(base, ctx, 0);
138 SET_PRRR(base, ctx, 0);
139 SET_NMRR(base, ctx, 0);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700140}
141
142static void __program_context(void __iomem *base, int ctx, phys_addr_t pgtable)
143{
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800144 unsigned int prrr, nmrr;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700145 __reset_context(base, ctx);
146
147 /* Set up HTW mode */
148 /* TLB miss configuration: perform HTW on miss */
149 SET_TLBMCFG(base, ctx, 0x3);
150
151 /* V2P configuration: HTW for access */
152 SET_V2PCFG(base, ctx, 0x3);
153
154 SET_TTBCR(base, ctx, 0);
155 SET_TTBR0_PA(base, ctx, (pgtable >> 14));
156
157 /* Invalidate the TLB for this context */
158 SET_CTX_TLBIALL(base, ctx, 0);
159
160 /* Set interrupt number to "secure" interrupt */
161 SET_IRPTNDX(base, ctx, 0);
162
163 /* Enable context fault interrupt */
164 SET_CFEIE(base, ctx, 1);
165
166 /* Stall access on a context fault and let the handler deal with it */
167 SET_CFCFG(base, ctx, 1);
168
169 /* Redirect all cacheable requests to L2 slave port. */
170 SET_RCISH(base, ctx, 1);
171 SET_RCOSH(base, ctx, 1);
172 SET_RCNSH(base, ctx, 1);
173
174 /* Turn on TEX Remap */
175 SET_TRE(base, ctx, 1);
176
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800177 /* Set TEX remap attributes */
178 RCP15_PRRR(prrr);
179 RCP15_NMRR(nmrr);
180 SET_PRRR(base, ctx, prrr);
181 SET_NMRR(base, ctx, nmrr);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700182
183 /* Turn on BFB prefetch */
184 SET_BFBDFE(base, ctx, 1);
185
186#ifdef CONFIG_IOMMU_PGTABLES_L2
187 /* Configure page tables as inner-cacheable and shareable to reduce
188 * the TLB miss penalty.
189 */
190 SET_TTBR0_SH(base, ctx, 1);
191 SET_TTBR1_SH(base, ctx, 1);
192
193 SET_TTBR0_NOS(base, ctx, 1);
194 SET_TTBR1_NOS(base, ctx, 1);
195
196 SET_TTBR0_IRGNH(base, ctx, 0); /* WB, WA */
197 SET_TTBR0_IRGNL(base, ctx, 1);
198
199 SET_TTBR1_IRGNH(base, ctx, 0); /* WB, WA */
200 SET_TTBR1_IRGNL(base, ctx, 1);
201
202 SET_TTBR0_ORGN(base, ctx, 1); /* WB, WA */
203 SET_TTBR1_ORGN(base, ctx, 1); /* WB, WA */
204#endif
205
206 /* Enable the MMU */
207 SET_M(base, ctx, 1);
208}
209
210static int msm_iommu_domain_init(struct iommu_domain *domain)
211{
212 struct msm_priv *priv = kzalloc(sizeof(*priv), GFP_KERNEL);
213
214 if (!priv)
215 goto fail_nomem;
216
217 INIT_LIST_HEAD(&priv->list_attached);
218 priv->pgtable = (unsigned long *)__get_free_pages(GFP_KERNEL,
219 get_order(SZ_16K));
220
221 if (!priv->pgtable)
222 goto fail_nomem;
223
224 memset(priv->pgtable, 0, SZ_16K);
225 domain->priv = priv;
226 return 0;
227
228fail_nomem:
229 kfree(priv);
230 return -ENOMEM;
231}
232
233static void msm_iommu_domain_destroy(struct iommu_domain *domain)
234{
235 struct msm_priv *priv;
236 unsigned long flags;
237 unsigned long *fl_table;
238 int i;
239
240 spin_lock_irqsave(&msm_iommu_lock, flags);
241 priv = domain->priv;
242 domain->priv = NULL;
243
244 if (priv) {
245 fl_table = priv->pgtable;
246
247 for (i = 0; i < NUM_FL_PTE; i++)
248 if ((fl_table[i] & 0x03) == FL_TYPE_TABLE)
249 free_page((unsigned long) __va(((fl_table[i]) &
250 FL_BASE_MASK)));
251
252 free_pages((unsigned long)priv->pgtable, get_order(SZ_16K));
253 priv->pgtable = NULL;
254 }
255
256 kfree(priv);
257 spin_unlock_irqrestore(&msm_iommu_lock, flags);
258}
259
260static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
261{
262 struct msm_priv *priv;
263 struct msm_iommu_ctx_dev *ctx_dev;
264 struct msm_iommu_drvdata *iommu_drvdata;
265 struct msm_iommu_ctx_drvdata *ctx_drvdata;
266 struct msm_iommu_ctx_drvdata *tmp_drvdata;
267 int ret = 0;
268 unsigned long flags;
269
270 spin_lock_irqsave(&msm_iommu_lock, flags);
271
272 priv = domain->priv;
273
274 if (!priv || !dev) {
275 ret = -EINVAL;
276 goto fail;
277 }
278
279 iommu_drvdata = dev_get_drvdata(dev->parent);
280 ctx_drvdata = dev_get_drvdata(dev);
281 ctx_dev = dev->platform_data;
282
283 if (!iommu_drvdata || !ctx_drvdata || !ctx_dev) {
284 ret = -EINVAL;
285 goto fail;
286 }
287
Stepan Moskovchenko00d4b2b2010-11-12 19:29:56 -0800288 if (!list_empty(&ctx_drvdata->attached_elm)) {
289 ret = -EBUSY;
290 goto fail;
291 }
292
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700293 list_for_each_entry(tmp_drvdata, &priv->list_attached, attached_elm)
294 if (tmp_drvdata == ctx_drvdata) {
295 ret = -EBUSY;
296 goto fail;
297 }
298
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800299 ret = __enable_clocks(iommu_drvdata);
300 if (ret)
301 goto fail;
302
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700303 __program_context(iommu_drvdata->base, ctx_dev->num,
304 __pa(priv->pgtable));
305
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800306 __disable_clocks(iommu_drvdata);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700307 list_add(&(ctx_drvdata->attached_elm), &priv->list_attached);
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800308 ret = __flush_iotlb(domain);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700309
310fail:
311 spin_unlock_irqrestore(&msm_iommu_lock, flags);
312 return ret;
313}
314
315static void msm_iommu_detach_dev(struct iommu_domain *domain,
316 struct device *dev)
317{
318 struct msm_priv *priv;
319 struct msm_iommu_ctx_dev *ctx_dev;
320 struct msm_iommu_drvdata *iommu_drvdata;
321 struct msm_iommu_ctx_drvdata *ctx_drvdata;
322 unsigned long flags;
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800323 int ret;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700324
325 spin_lock_irqsave(&msm_iommu_lock, flags);
326 priv = domain->priv;
327
328 if (!priv || !dev)
329 goto fail;
330
331 iommu_drvdata = dev_get_drvdata(dev->parent);
332 ctx_drvdata = dev_get_drvdata(dev);
333 ctx_dev = dev->platform_data;
334
335 if (!iommu_drvdata || !ctx_drvdata || !ctx_dev)
336 goto fail;
337
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800338 ret = __flush_iotlb(domain);
339 if (ret)
340 goto fail;
341
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800342 ret = __enable_clocks(iommu_drvdata);
343 if (ret)
344 goto fail;
345
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700346 __reset_context(iommu_drvdata->base, ctx_dev->num);
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800347 __disable_clocks(iommu_drvdata);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700348 list_del_init(&ctx_drvdata->attached_elm);
349
350fail:
351 spin_unlock_irqrestore(&msm_iommu_lock, flags);
352}
353
354static int msm_iommu_map(struct iommu_domain *domain, unsigned long va,
355 phys_addr_t pa, int order, int prot)
356{
357 struct msm_priv *priv;
358 unsigned long flags;
359 unsigned long *fl_table;
360 unsigned long *fl_pte;
361 unsigned long fl_offset;
362 unsigned long *sl_table;
363 unsigned long *sl_pte;
364 unsigned long sl_offset;
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800365 unsigned int pgprot;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700366 size_t len = 0x1000UL << order;
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800367 int ret = 0, tex, sh;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700368
369 spin_lock_irqsave(&msm_iommu_lock, flags);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700370
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800371 sh = (prot & MSM_IOMMU_ATTR_SH) ? 1 : 0;
372 tex = msm_iommu_tex_class[prot & MSM_IOMMU_CP_MASK];
373
374 if (tex < 0 || tex > NUM_TEX_CLASS - 1) {
375 ret = -EINVAL;
376 goto fail;
377 }
378
379 priv = domain->priv;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700380 if (!priv) {
381 ret = -EINVAL;
382 goto fail;
383 }
384
385 fl_table = priv->pgtable;
386
387 if (len != SZ_16M && len != SZ_1M &&
388 len != SZ_64K && len != SZ_4K) {
389 pr_debug("Bad size: %d\n", len);
390 ret = -EINVAL;
391 goto fail;
392 }
393
394 if (!fl_table) {
395 pr_debug("Null page table\n");
396 ret = -EINVAL;
397 goto fail;
398 }
399
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800400 if (len == SZ_16M || len == SZ_1M) {
401 pgprot = sh ? FL_SHARED : 0;
402 pgprot |= tex & 0x01 ? FL_BUFFERABLE : 0;
403 pgprot |= tex & 0x02 ? FL_CACHEABLE : 0;
404 pgprot |= tex & 0x04 ? FL_TEX0 : 0;
405 } else {
406 pgprot = sh ? SL_SHARED : 0;
407 pgprot |= tex & 0x01 ? SL_BUFFERABLE : 0;
408 pgprot |= tex & 0x02 ? SL_CACHEABLE : 0;
409 pgprot |= tex & 0x04 ? SL_TEX0 : 0;
410 }
411
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700412 fl_offset = FL_OFFSET(va); /* Upper 12 bits */
413 fl_pte = fl_table + fl_offset; /* int pointers, 4 bytes */
414
415 if (len == SZ_16M) {
416 int i = 0;
417 for (i = 0; i < 16; i++)
418 *(fl_pte+i) = (pa & 0xFF000000) | FL_SUPERSECTION |
419 FL_AP_READ | FL_AP_WRITE | FL_TYPE_SECT |
Stepan Moskovchenko2e8c8ba2011-02-24 18:00:41 -0800420 FL_SHARED | FL_NG | pgprot;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700421 }
422
423 if (len == SZ_1M)
Stepan Moskovchenko2e8c8ba2011-02-24 18:00:41 -0800424 *fl_pte = (pa & 0xFFF00000) | FL_AP_READ | FL_AP_WRITE | FL_NG |
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800425 FL_TYPE_SECT | FL_SHARED | pgprot;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700426
427 /* Need a 2nd level table */
428 if ((len == SZ_4K || len == SZ_64K) && (*fl_pte) == 0) {
429 unsigned long *sl;
Stepan Moskovchenko294b2de2010-12-10 14:12:03 -0800430 sl = (unsigned long *) __get_free_pages(GFP_ATOMIC,
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700431 get_order(SZ_4K));
432
433 if (!sl) {
434 pr_debug("Could not allocate second level table\n");
435 ret = -ENOMEM;
436 goto fail;
437 }
438
439 memset(sl, 0, SZ_4K);
440 *fl_pte = ((((int)__pa(sl)) & FL_BASE_MASK) | FL_TYPE_TABLE);
441 }
442
443 sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK));
444 sl_offset = SL_OFFSET(va);
445 sl_pte = sl_table + sl_offset;
446
447
448 if (len == SZ_4K)
Stepan Moskovchenko2e8c8ba2011-02-24 18:00:41 -0800449 *sl_pte = (pa & SL_BASE_MASK_SMALL) | SL_AP0 | SL_AP1 | SL_NG |
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800450 SL_SHARED | SL_TYPE_SMALL | pgprot;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700451
452 if (len == SZ_64K) {
453 int i;
454
455 for (i = 0; i < 16; i++)
456 *(sl_pte+i) = (pa & SL_BASE_MASK_LARGE) | SL_AP0 |
Stepan Moskovchenko2e8c8ba2011-02-24 18:00:41 -0800457 SL_NG | SL_AP1 | SL_SHARED | SL_TYPE_LARGE | pgprot;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700458 }
459
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800460 ret = __flush_iotlb(domain);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700461fail:
462 spin_unlock_irqrestore(&msm_iommu_lock, flags);
463 return ret;
464}
465
466static int msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
467 int order)
468{
469 struct msm_priv *priv;
470 unsigned long flags;
471 unsigned long *fl_table;
472 unsigned long *fl_pte;
473 unsigned long fl_offset;
474 unsigned long *sl_table;
475 unsigned long *sl_pte;
476 unsigned long sl_offset;
477 size_t len = 0x1000UL << order;
478 int i, ret = 0;
479
480 spin_lock_irqsave(&msm_iommu_lock, flags);
481
482 priv = domain->priv;
483
484 if (!priv) {
485 ret = -ENODEV;
486 goto fail;
487 }
488
489 fl_table = priv->pgtable;
490
491 if (len != SZ_16M && len != SZ_1M &&
492 len != SZ_64K && len != SZ_4K) {
493 pr_debug("Bad length: %d\n", len);
494 ret = -EINVAL;
495 goto fail;
496 }
497
498 if (!fl_table) {
499 pr_debug("Null page table\n");
500 ret = -EINVAL;
501 goto fail;
502 }
503
504 fl_offset = FL_OFFSET(va); /* Upper 12 bits */
505 fl_pte = fl_table + fl_offset; /* int pointers, 4 bytes */
506
507 if (*fl_pte == 0) {
508 pr_debug("First level PTE is 0\n");
509 ret = -ENODEV;
510 goto fail;
511 }
512
513 /* Unmap supersection */
514 if (len == SZ_16M)
515 for (i = 0; i < 16; i++)
516 *(fl_pte+i) = 0;
517
518 if (len == SZ_1M)
519 *fl_pte = 0;
520
521 sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK));
522 sl_offset = SL_OFFSET(va);
523 sl_pte = sl_table + sl_offset;
524
525 if (len == SZ_64K) {
526 for (i = 0; i < 16; i++)
527 *(sl_pte+i) = 0;
528 }
529
530 if (len == SZ_4K)
531 *sl_pte = 0;
532
533 if (len == SZ_4K || len == SZ_64K) {
534 int used = 0;
535
536 for (i = 0; i < NUM_SL_PTE; i++)
537 if (sl_table[i])
538 used = 1;
539 if (!used) {
540 free_page((unsigned long)sl_table);
541 *fl_pte = 0;
542 }
543 }
544
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800545 ret = __flush_iotlb(domain);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700546fail:
547 spin_unlock_irqrestore(&msm_iommu_lock, flags);
548 return ret;
549}
550
551static phys_addr_t msm_iommu_iova_to_phys(struct iommu_domain *domain,
552 unsigned long va)
553{
554 struct msm_priv *priv;
555 struct msm_iommu_drvdata *iommu_drvdata;
556 struct msm_iommu_ctx_drvdata *ctx_drvdata;
557 unsigned int par;
558 unsigned long flags;
559 void __iomem *base;
560 phys_addr_t ret = 0;
561 int ctx;
562
563 spin_lock_irqsave(&msm_iommu_lock, flags);
564
565 priv = domain->priv;
566 if (list_empty(&priv->list_attached))
567 goto fail;
568
569 ctx_drvdata = list_entry(priv->list_attached.next,
570 struct msm_iommu_ctx_drvdata, attached_elm);
571 iommu_drvdata = dev_get_drvdata(ctx_drvdata->pdev->dev.parent);
572
573 base = iommu_drvdata->base;
574 ctx = ctx_drvdata->num;
575
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800576 ret = __enable_clocks(iommu_drvdata);
577 if (ret)
578 goto fail;
579
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700580 /* Invalidate context TLB */
581 SET_CTX_TLBIALL(base, ctx, 0);
Stepan Moskovchenkob0e7808d2011-02-28 16:04:55 -0800582 SET_V2PPR(base, ctx, va & V2Pxx_VA);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700583
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700584 par = GET_PAR(base, ctx);
585
586 /* We are dealing with a supersection */
587 if (GET_NOFAULT_SS(base, ctx))
588 ret = (par & 0xFF000000) | (va & 0x00FFFFFF);
589 else /* Upper 20 bits from PAR, lower 12 from VA */
590 ret = (par & 0xFFFFF000) | (va & 0x00000FFF);
591
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800592 if (GET_FAULT(base, ctx))
593 ret = 0;
594
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800595 __disable_clocks(iommu_drvdata);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700596fail:
597 spin_unlock_irqrestore(&msm_iommu_lock, flags);
598 return ret;
599}
600
601static int msm_iommu_domain_has_cap(struct iommu_domain *domain,
602 unsigned long cap)
603{
604 return 0;
605}
606
607static void print_ctx_regs(void __iomem *base, int ctx)
608{
609 unsigned int fsr = GET_FSR(base, ctx);
610 pr_err("FAR = %08x PAR = %08x\n",
611 GET_FAR(base, ctx), GET_PAR(base, ctx));
612 pr_err("FSR = %08x [%s%s%s%s%s%s%s%s%s%s]\n", fsr,
613 (fsr & 0x02) ? "TF " : "",
614 (fsr & 0x04) ? "AFF " : "",
615 (fsr & 0x08) ? "APF " : "",
616 (fsr & 0x10) ? "TLBMF " : "",
617 (fsr & 0x20) ? "HTWDEEF " : "",
618 (fsr & 0x40) ? "HTWSEEF " : "",
619 (fsr & 0x80) ? "MHF " : "",
620 (fsr & 0x10000) ? "SL " : "",
621 (fsr & 0x40000000) ? "SS " : "",
622 (fsr & 0x80000000) ? "MULTI " : "");
623
624 pr_err("FSYNR0 = %08x FSYNR1 = %08x\n",
625 GET_FSYNR0(base, ctx), GET_FSYNR1(base, ctx));
626 pr_err("TTBR0 = %08x TTBR1 = %08x\n",
627 GET_TTBR0(base, ctx), GET_TTBR1(base, ctx));
628 pr_err("SCTLR = %08x ACTLR = %08x\n",
629 GET_SCTLR(base, ctx), GET_ACTLR(base, ctx));
630 pr_err("PRRR = %08x NMRR = %08x\n",
631 GET_PRRR(base, ctx), GET_NMRR(base, ctx));
632}
633
634irqreturn_t msm_iommu_fault_handler(int irq, void *dev_id)
635{
636 struct msm_iommu_drvdata *drvdata = dev_id;
637 void __iomem *base;
Stepan Moskovchenko33069732010-11-12 19:30:00 -0800638 unsigned int fsr;
Stepan Moskovchenkoa43d8c12011-02-24 18:00:42 -0800639 int i, ret;
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700640
641 spin_lock(&msm_iommu_lock);
642
643 if (!drvdata) {
644 pr_err("Invalid device ID in context interrupt handler\n");
645 goto fail;
646 }
647
648 base = drvdata->base;
649
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700650 pr_err("Unexpected IOMMU page fault!\n");
651 pr_err("base = %08x\n", (unsigned int) base);
652
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800653 ret = __enable_clocks(drvdata);
654 if (ret)
655 goto fail;
656
Stepan Moskovchenkoa43d8c12011-02-24 18:00:42 -0800657 for (i = 0; i < drvdata->ncb; i++) {
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700658 fsr = GET_FSR(base, i);
659 if (fsr) {
660 pr_err("Fault occurred in context %d.\n", i);
661 pr_err("Interesting registers:\n");
662 print_ctx_regs(base, i);
663 SET_FSR(base, i, 0x4000000F);
664 }
665 }
Stepan Moskovchenko41f3f512011-02-24 18:00:39 -0800666 __disable_clocks(drvdata);
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700667fail:
668 spin_unlock(&msm_iommu_lock);
669 return 0;
670}
671
672static struct iommu_ops msm_iommu_ops = {
673 .domain_init = msm_iommu_domain_init,
674 .domain_destroy = msm_iommu_domain_destroy,
675 .attach_dev = msm_iommu_attach_dev,
676 .detach_dev = msm_iommu_detach_dev,
677 .map = msm_iommu_map,
678 .unmap = msm_iommu_unmap,
679 .iova_to_phys = msm_iommu_iova_to_phys,
680 .domain_has_cap = msm_iommu_domain_has_cap
681};
682
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800683static int __init get_tex_class(int icp, int ocp, int mt, int nos)
684{
685 int i = 0;
686 unsigned int prrr = 0;
687 unsigned int nmrr = 0;
688 int c_icp, c_ocp, c_mt, c_nos;
689
690 RCP15_PRRR(prrr);
691 RCP15_NMRR(nmrr);
692
693 for (i = 0; i < NUM_TEX_CLASS; i++) {
694 c_nos = PRRR_NOS(prrr, i);
695 c_mt = PRRR_MT(prrr, i);
696 c_icp = NMRR_ICP(nmrr, i);
697 c_ocp = NMRR_OCP(nmrr, i);
698
699 if (icp == c_icp && ocp == c_ocp && c_mt == mt && c_nos == nos)
700 return i;
701 }
702
703 return -ENODEV;
704}
705
706static void __init setup_iommu_tex_classes(void)
707{
708 msm_iommu_tex_class[MSM_IOMMU_ATTR_NONCACHED] =
709 get_tex_class(CP_NONCACHED, CP_NONCACHED, MT_NORMAL, 1);
710
711 msm_iommu_tex_class[MSM_IOMMU_ATTR_CACHED_WB_WA] =
712 get_tex_class(CP_WB_WA, CP_WB_WA, MT_NORMAL, 1);
713
714 msm_iommu_tex_class[MSM_IOMMU_ATTR_CACHED_WB_NWA] =
715 get_tex_class(CP_WB_NWA, CP_WB_NWA, MT_NORMAL, 1);
716
717 msm_iommu_tex_class[MSM_IOMMU_ATTR_CACHED_WT] =
718 get_tex_class(CP_WT, CP_WT, MT_NORMAL, 1);
719}
720
Stepan Moskovchenko516cbc72010-11-12 19:29:53 -0800721static int __init msm_iommu_init(void)
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700722{
Stepan Moskovchenko100832c2010-11-15 18:20:08 -0800723 setup_iommu_tex_classes();
Stepan Moskovchenko0720d1f2010-08-24 18:31:10 -0700724 register_iommu(&msm_iommu_ops);
725 return 0;
726}
727
728subsys_initcall(msm_iommu_init);
729
730MODULE_LICENSE("GPL v2");
731MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");