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1/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
2 *
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
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/platform_device.h>
23#include <linux/io.h>
24#include <linux/clk.h>
25#include <linux/iommu.h>
26#include <linux/interrupt.h>
27#include <linux/err.h>
28#include <linux/slab.h>
29
30#include "msm_iommu_hw-8xxx.h"
31#include "msm_iommu.h"
32
33struct iommu_ctx_iter_data {
34 /* input */
35 const char *name;
36
37 /* output */
38 struct device *dev;
39};
40
41static struct platform_device *msm_iommu_root_dev;
42
43static int each_iommu_ctx(struct device *dev, void *data)
44{
45 struct iommu_ctx_iter_data *res = data;
46 struct msm_iommu_ctx_dev *c = dev->platform_data;
47
48 if (!res || !c || !c->name || !res->name)
49 return -EINVAL;
50
51 if (!strcmp(res->name, c->name)) {
52 res->dev = dev;
53 return 1;
54 }
55 return 0;
56}
57
58static int each_iommu(struct device *dev, void *data)
59{
60 return device_for_each_child(dev, data, each_iommu_ctx);
61}
62
63struct device *msm_iommu_get_ctx(const char *ctx_name)
64{
65 struct iommu_ctx_iter_data r;
66 int found;
67
68 if (!msm_iommu_root_dev) {
69 pr_err("No root IOMMU device.\n");
70 goto fail;
71 }
72
73 r.name = ctx_name;
74 found = device_for_each_child(&msm_iommu_root_dev->dev, &r, each_iommu);
75
76 if (!found) {
77 pr_err("Could not find context <%s>\n", ctx_name);
78 goto fail;
79 }
80
81 return r.dev;
82fail:
83 return NULL;
84}
85EXPORT_SYMBOL(msm_iommu_get_ctx);
86
87static void msm_iommu_reset(void __iomem *base, int ncb)
88{
89 int ctx;
90
91 SET_RPUE(base, 0);
92 SET_RPUEIE(base, 0);
93 SET_ESRRESTORE(base, 0);
94 SET_TBE(base, 0);
95 SET_CR(base, 0);
96 SET_SPDMBE(base, 0);
97 SET_TESTBUSCR(base, 0);
98 SET_TLBRSW(base, 0);
99 SET_GLOBAL_TLBIALL(base, 0);
100 SET_RPU_ACR(base, 0);
101 SET_TLBLKCRWE(base, 1);
102
103 for (ctx = 0; ctx < ncb; ctx++) {
104 SET_BPRCOSH(base, ctx, 0);
105 SET_BPRCISH(base, ctx, 0);
106 SET_BPRCNSH(base, ctx, 0);
107 SET_BPSHCFG(base, ctx, 0);
108 SET_BPMTCFG(base, ctx, 0);
109 SET_ACTLR(base, ctx, 0);
110 SET_SCTLR(base, ctx, 0);
111 SET_FSRRESTORE(base, ctx, 0);
112 SET_TTBR0(base, ctx, 0);
113 SET_TTBR1(base, ctx, 0);
114 SET_TTBCR(base, ctx, 0);
115 SET_BFBCR(base, ctx, 0);
116 SET_PAR(base, ctx, 0);
117 SET_FAR(base, ctx, 0);
118 SET_CTX_TLBIALL(base, ctx, 0);
119 SET_TLBFLPTER(base, ctx, 0);
120 SET_TLBSLPTER(base, ctx, 0);
121 SET_TLBLKCR(base, ctx, 0);
122 SET_PRRR(base, ctx, 0);
123 SET_NMRR(base, ctx, 0);
124 SET_CONTEXTIDR(base, ctx, 0);
125 }
126}
127
128static int msm_iommu_probe(struct platform_device *pdev)
129{
130 struct resource *r;
131 struct clk *iommu_clk;
132 struct clk *iommu_pclk;
133 struct msm_iommu_drvdata *drvdata;
134 struct msm_iommu_dev *iommu_dev = dev_get_platdata(&pdev->dev);
135 void __iomem *regs_base;
136 int ret, irq, par;
137
138 if (pdev->id == -1) {
139 msm_iommu_root_dev = pdev;
140 return 0;
141 }
142
143 drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
144
145 if (!drvdata) {
146 ret = -ENOMEM;
147 goto fail;
148 }
149
150 if (!iommu_dev) {
151 ret = -ENODEV;
152 goto fail;
153 }
154
155 iommu_pclk = clk_get(NULL, "smmu_pclk");
156 if (IS_ERR(iommu_pclk)) {
157 ret = -ENODEV;
158 goto fail;
159 }
160
161 ret = clk_prepare_enable(iommu_pclk);
162 if (ret)
163 goto fail_enable;
164
165 iommu_clk = clk_get(&pdev->dev, "iommu_clk");
166
167 if (!IS_ERR(iommu_clk)) {
168 if (clk_get_rate(iommu_clk) == 0)
169 clk_set_rate(iommu_clk, 1);
170
171 ret = clk_prepare_enable(iommu_clk);
172 if (ret) {
173 clk_put(iommu_clk);
174 goto fail_pclk;
175 }
176 } else
177 iommu_clk = NULL;
178
179 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase");
180 regs_base = devm_ioremap_resource(&pdev->dev, r);
181 if (IS_ERR(regs_base)) {
182 ret = PTR_ERR(regs_base);
183 goto fail_clk;
184 }
185
186 irq = platform_get_irq_byname(pdev, "secure_irq");
187 if (irq < 0) {
188 ret = -ENODEV;
189 goto fail_clk;
190 }
191
192 msm_iommu_reset(regs_base, iommu_dev->ncb);
193
194 SET_M(regs_base, 0, 1);
195 SET_PAR(regs_base, 0, 0);
196 SET_V2PCFG(regs_base, 0, 1);
197 SET_V2PPR(regs_base, 0, 0);
198 par = GET_PAR(regs_base, 0);
199 SET_V2PCFG(regs_base, 0, 0);
200 SET_M(regs_base, 0, 0);
201
202 if (!par) {
203 pr_err("%s: Invalid PAR value detected\n", iommu_dev->name);
204 ret = -ENODEV;
205 goto fail_clk;
206 }
207
208 ret = request_irq(irq, msm_iommu_fault_handler, 0,
209 "msm_iommu_secure_irpt_handler", drvdata);
210 if (ret) {
211 pr_err("Request IRQ %d failed with ret=%d\n", irq, ret);
212 goto fail_clk;
213 }
214
215
216 drvdata->pclk = iommu_pclk;
217 drvdata->clk = iommu_clk;
218 drvdata->base = regs_base;
219 drvdata->irq = irq;
220 drvdata->ncb = iommu_dev->ncb;
221
222 pr_info("device %s mapped at %p, irq %d with %d ctx banks\n",
223 iommu_dev->name, regs_base, irq, iommu_dev->ncb);
224
225 platform_set_drvdata(pdev, drvdata);
226
227 clk_disable(iommu_clk);
228
229 clk_disable(iommu_pclk);
230
231 return 0;
232fail_clk:
233 if (iommu_clk) {
234 clk_disable(iommu_clk);
235 clk_put(iommu_clk);
236 }
237fail_pclk:
238 clk_disable_unprepare(iommu_pclk);
239fail_enable:
240 clk_put(iommu_pclk);
241fail:
242 kfree(drvdata);
243 return ret;
244}
245
246static int msm_iommu_remove(struct platform_device *pdev)
247{
248 struct msm_iommu_drvdata *drv = NULL;
249
250 drv = platform_get_drvdata(pdev);
251 if (drv) {
252 if (drv->clk) {
253 clk_unprepare(drv->clk);
254 clk_put(drv->clk);
255 }
256 clk_unprepare(drv->pclk);
257 clk_put(drv->pclk);
258 memset(drv, 0, sizeof(*drv));
259 kfree(drv);
260 }
261 return 0;
262}
263
264static int msm_iommu_ctx_probe(struct platform_device *pdev)
265{
266 struct msm_iommu_ctx_dev *c = dev_get_platdata(&pdev->dev);
267 struct msm_iommu_drvdata *drvdata;
268 struct msm_iommu_ctx_drvdata *ctx_drvdata;
269 int i, ret;
270
271 if (!c || !pdev->dev.parent)
272 return -EINVAL;
273
274 drvdata = dev_get_drvdata(pdev->dev.parent);
275 if (!drvdata)
276 return -ENODEV;
277
278 ctx_drvdata = kzalloc(sizeof(*ctx_drvdata), GFP_KERNEL);
279 if (!ctx_drvdata)
280 return -ENOMEM;
281
282 ctx_drvdata->num = c->num;
283 ctx_drvdata->pdev = pdev;
284
285 INIT_LIST_HEAD(&ctx_drvdata->attached_elm);
286 platform_set_drvdata(pdev, ctx_drvdata);
287
288 ret = clk_prepare_enable(drvdata->pclk);
289 if (ret)
290 goto fail;
291
292 if (drvdata->clk) {
293 ret = clk_prepare_enable(drvdata->clk);
294 if (ret) {
295 clk_disable_unprepare(drvdata->pclk);
296 goto fail;
297 }
298 }
299
300 /* Program the M2V tables for this context */
301 for (i = 0; i < MAX_NUM_MIDS; i++) {
302 int mid = c->mids[i];
303 if (mid == -1)
304 break;
305
306 SET_M2VCBR_N(drvdata->base, mid, 0);
307 SET_CBACR_N(drvdata->base, c->num, 0);
308
309 /* Set VMID = 0 */
310 SET_VMID(drvdata->base, mid, 0);
311
312 /* Set the context number for that MID to this context */
313 SET_CBNDX(drvdata->base, mid, c->num);
314
315 /* Set MID associated with this context bank to 0*/
316 SET_CBVMID(drvdata->base, c->num, 0);
317
318 /* Set the ASID for TLB tagging for this context */
319 SET_CONTEXTIDR_ASID(drvdata->base, c->num, c->num);
320
321 /* Set security bit override to be Non-secure */
322 SET_NSCFG(drvdata->base, mid, 3);
323 }
324
325 clk_disable(drvdata->clk);
326 clk_disable(drvdata->pclk);
327
328 dev_info(&pdev->dev, "context %s using bank %d\n", c->name, c->num);
329 return 0;
330fail:
331 kfree(ctx_drvdata);
332 return ret;
333}
334
335static int msm_iommu_ctx_remove(struct platform_device *pdev)
336{
337 struct msm_iommu_ctx_drvdata *drv = NULL;
338 drv = platform_get_drvdata(pdev);
339 if (drv) {
340 memset(drv, 0, sizeof(struct msm_iommu_ctx_drvdata));
341 kfree(drv);
342 }
343 return 0;
344}
345
346static struct platform_driver msm_iommu_driver = {
347 .driver = {
348 .name = "msm_iommu",
349 },
350 .probe = msm_iommu_probe,
351 .remove = msm_iommu_remove,
352};
353
354static struct platform_driver msm_iommu_ctx_driver = {
355 .driver = {
356 .name = "msm_iommu_ctx",
357 },
358 .probe = msm_iommu_ctx_probe,
359 .remove = msm_iommu_ctx_remove,
360};
361
362static struct platform_driver * const drivers[] = {
363 &msm_iommu_driver,
364 &msm_iommu_ctx_driver,
365};
366
367static int __init msm_iommu_driver_init(void)
368{
369 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
370}
371
372static void __exit msm_iommu_driver_exit(void)
373{
374 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
375}
376
377subsys_initcall(msm_iommu_driver_init);
378module_exit(msm_iommu_driver_exit);
379
380MODULE_LICENSE("GPL v2");
381MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");
1/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
2 *
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
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/platform_device.h>
23#include <linux/io.h>
24#include <linux/clk.h>
25#include <linux/iommu.h>
26#include <linux/interrupt.h>
27#include <linux/err.h>
28#include <linux/slab.h>
29
30#include "msm_iommu_hw-8xxx.h"
31#include "msm_iommu.h"
32
33struct iommu_ctx_iter_data {
34 /* input */
35 const char *name;
36
37 /* output */
38 struct device *dev;
39};
40
41static struct platform_device *msm_iommu_root_dev;
42
43static int each_iommu_ctx(struct device *dev, void *data)
44{
45 struct iommu_ctx_iter_data *res = data;
46 struct msm_iommu_ctx_dev *c = dev->platform_data;
47
48 if (!res || !c || !c->name || !res->name)
49 return -EINVAL;
50
51 if (!strcmp(res->name, c->name)) {
52 res->dev = dev;
53 return 1;
54 }
55 return 0;
56}
57
58static int each_iommu(struct device *dev, void *data)
59{
60 return device_for_each_child(dev, data, each_iommu_ctx);
61}
62
63struct device *msm_iommu_get_ctx(const char *ctx_name)
64{
65 struct iommu_ctx_iter_data r;
66 int found;
67
68 if (!msm_iommu_root_dev) {
69 pr_err("No root IOMMU device.\n");
70 goto fail;
71 }
72
73 r.name = ctx_name;
74 found = device_for_each_child(&msm_iommu_root_dev->dev, &r, each_iommu);
75
76 if (!found) {
77 pr_err("Could not find context <%s>\n", ctx_name);
78 goto fail;
79 }
80
81 return r.dev;
82fail:
83 return NULL;
84}
85EXPORT_SYMBOL(msm_iommu_get_ctx);
86
87static void msm_iommu_reset(void __iomem *base, int ncb)
88{
89 int ctx;
90
91 SET_RPUE(base, 0);
92 SET_RPUEIE(base, 0);
93 SET_ESRRESTORE(base, 0);
94 SET_TBE(base, 0);
95 SET_CR(base, 0);
96 SET_SPDMBE(base, 0);
97 SET_TESTBUSCR(base, 0);
98 SET_TLBRSW(base, 0);
99 SET_GLOBAL_TLBIALL(base, 0);
100 SET_RPU_ACR(base, 0);
101 SET_TLBLKCRWE(base, 1);
102
103 for (ctx = 0; ctx < ncb; ctx++) {
104 SET_BPRCOSH(base, ctx, 0);
105 SET_BPRCISH(base, ctx, 0);
106 SET_BPRCNSH(base, ctx, 0);
107 SET_BPSHCFG(base, ctx, 0);
108 SET_BPMTCFG(base, ctx, 0);
109 SET_ACTLR(base, ctx, 0);
110 SET_SCTLR(base, ctx, 0);
111 SET_FSRRESTORE(base, ctx, 0);
112 SET_TTBR0(base, ctx, 0);
113 SET_TTBR1(base, ctx, 0);
114 SET_TTBCR(base, ctx, 0);
115 SET_BFBCR(base, ctx, 0);
116 SET_PAR(base, ctx, 0);
117 SET_FAR(base, ctx, 0);
118 SET_CTX_TLBIALL(base, ctx, 0);
119 SET_TLBFLPTER(base, ctx, 0);
120 SET_TLBSLPTER(base, ctx, 0);
121 SET_TLBLKCR(base, ctx, 0);
122 SET_PRRR(base, ctx, 0);
123 SET_NMRR(base, ctx, 0);
124 SET_CONTEXTIDR(base, ctx, 0);
125 }
126}
127
128static int msm_iommu_probe(struct platform_device *pdev)
129{
130 struct resource *r, *r2;
131 struct clk *iommu_clk;
132 struct clk *iommu_pclk;
133 struct msm_iommu_drvdata *drvdata;
134 struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data;
135 void __iomem *regs_base;
136 resource_size_t len;
137 int ret, irq, par;
138
139 if (pdev->id == -1) {
140 msm_iommu_root_dev = pdev;
141 return 0;
142 }
143
144 drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
145
146 if (!drvdata) {
147 ret = -ENOMEM;
148 goto fail;
149 }
150
151 if (!iommu_dev) {
152 ret = -ENODEV;
153 goto fail;
154 }
155
156 iommu_pclk = clk_get(NULL, "smmu_pclk");
157 if (IS_ERR(iommu_pclk)) {
158 ret = -ENODEV;
159 goto fail;
160 }
161
162 ret = clk_prepare_enable(iommu_pclk);
163 if (ret)
164 goto fail_enable;
165
166 iommu_clk = clk_get(&pdev->dev, "iommu_clk");
167
168 if (!IS_ERR(iommu_clk)) {
169 if (clk_get_rate(iommu_clk) == 0)
170 clk_set_rate(iommu_clk, 1);
171
172 ret = clk_prepare_enable(iommu_clk);
173 if (ret) {
174 clk_put(iommu_clk);
175 goto fail_pclk;
176 }
177 } else
178 iommu_clk = NULL;
179
180 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase");
181
182 if (!r) {
183 ret = -ENODEV;
184 goto fail_clk;
185 }
186
187 len = resource_size(r);
188
189 r2 = request_mem_region(r->start, len, r->name);
190 if (!r2) {
191 pr_err("Could not request memory region: start=%p, len=%d\n",
192 (void *) r->start, len);
193 ret = -EBUSY;
194 goto fail_clk;
195 }
196
197 regs_base = ioremap(r2->start, len);
198
199 if (!regs_base) {
200 pr_err("Could not ioremap: start=%p, len=%d\n",
201 (void *) r2->start, len);
202 ret = -EBUSY;
203 goto fail_mem;
204 }
205
206 irq = platform_get_irq_byname(pdev, "secure_irq");
207 if (irq < 0) {
208 ret = -ENODEV;
209 goto fail_io;
210 }
211
212 msm_iommu_reset(regs_base, iommu_dev->ncb);
213
214 SET_M(regs_base, 0, 1);
215 SET_PAR(regs_base, 0, 0);
216 SET_V2PCFG(regs_base, 0, 1);
217 SET_V2PPR(regs_base, 0, 0);
218 par = GET_PAR(regs_base, 0);
219 SET_V2PCFG(regs_base, 0, 0);
220 SET_M(regs_base, 0, 0);
221
222 if (!par) {
223 pr_err("%s: Invalid PAR value detected\n", iommu_dev->name);
224 ret = -ENODEV;
225 goto fail_io;
226 }
227
228 ret = request_irq(irq, msm_iommu_fault_handler, 0,
229 "msm_iommu_secure_irpt_handler", drvdata);
230 if (ret) {
231 pr_err("Request IRQ %d failed with ret=%d\n", irq, ret);
232 goto fail_io;
233 }
234
235
236 drvdata->pclk = iommu_pclk;
237 drvdata->clk = iommu_clk;
238 drvdata->base = regs_base;
239 drvdata->irq = irq;
240 drvdata->ncb = iommu_dev->ncb;
241
242 pr_info("device %s mapped at %p, irq %d with %d ctx banks\n",
243 iommu_dev->name, regs_base, irq, iommu_dev->ncb);
244
245 platform_set_drvdata(pdev, drvdata);
246
247 if (iommu_clk)
248 clk_disable(iommu_clk);
249
250 clk_disable(iommu_pclk);
251
252 return 0;
253fail_io:
254 iounmap(regs_base);
255fail_mem:
256 release_mem_region(r->start, len);
257fail_clk:
258 if (iommu_clk) {
259 clk_disable(iommu_clk);
260 clk_put(iommu_clk);
261 }
262fail_pclk:
263 clk_disable_unprepare(iommu_pclk);
264fail_enable:
265 clk_put(iommu_pclk);
266fail:
267 kfree(drvdata);
268 return ret;
269}
270
271static int msm_iommu_remove(struct platform_device *pdev)
272{
273 struct msm_iommu_drvdata *drv = NULL;
274
275 drv = platform_get_drvdata(pdev);
276 if (drv) {
277 if (drv->clk) {
278 clk_unprepare(drv->clk);
279 clk_put(drv->clk);
280 }
281 clk_unprepare(drv->pclk);
282 clk_put(drv->pclk);
283 memset(drv, 0, sizeof(*drv));
284 kfree(drv);
285 }
286 return 0;
287}
288
289static int msm_iommu_ctx_probe(struct platform_device *pdev)
290{
291 struct msm_iommu_ctx_dev *c = pdev->dev.platform_data;
292 struct msm_iommu_drvdata *drvdata;
293 struct msm_iommu_ctx_drvdata *ctx_drvdata;
294 int i, ret;
295
296 if (!c || !pdev->dev.parent)
297 return -EINVAL;
298
299 drvdata = dev_get_drvdata(pdev->dev.parent);
300 if (!drvdata)
301 return -ENODEV;
302
303 ctx_drvdata = kzalloc(sizeof(*ctx_drvdata), GFP_KERNEL);
304 if (!ctx_drvdata)
305 return -ENOMEM;
306
307 ctx_drvdata->num = c->num;
308 ctx_drvdata->pdev = pdev;
309
310 INIT_LIST_HEAD(&ctx_drvdata->attached_elm);
311 platform_set_drvdata(pdev, ctx_drvdata);
312
313 ret = clk_prepare_enable(drvdata->pclk);
314 if (ret)
315 goto fail;
316
317 if (drvdata->clk) {
318 ret = clk_prepare_enable(drvdata->clk);
319 if (ret) {
320 clk_disable_unprepare(drvdata->pclk);
321 goto fail;
322 }
323 }
324
325 /* Program the M2V tables for this context */
326 for (i = 0; i < MAX_NUM_MIDS; i++) {
327 int mid = c->mids[i];
328 if (mid == -1)
329 break;
330
331 SET_M2VCBR_N(drvdata->base, mid, 0);
332 SET_CBACR_N(drvdata->base, c->num, 0);
333
334 /* Set VMID = 0 */
335 SET_VMID(drvdata->base, mid, 0);
336
337 /* Set the context number for that MID to this context */
338 SET_CBNDX(drvdata->base, mid, c->num);
339
340 /* Set MID associated with this context bank to 0*/
341 SET_CBVMID(drvdata->base, c->num, 0);
342
343 /* Set the ASID for TLB tagging for this context */
344 SET_CONTEXTIDR_ASID(drvdata->base, c->num, c->num);
345
346 /* Set security bit override to be Non-secure */
347 SET_NSCFG(drvdata->base, mid, 3);
348 }
349
350 if (drvdata->clk)
351 clk_disable(drvdata->clk);
352 clk_disable(drvdata->pclk);
353
354 dev_info(&pdev->dev, "context %s using bank %d\n", c->name, c->num);
355 return 0;
356fail:
357 kfree(ctx_drvdata);
358 return ret;
359}
360
361static int msm_iommu_ctx_remove(struct platform_device *pdev)
362{
363 struct msm_iommu_ctx_drvdata *drv = NULL;
364 drv = platform_get_drvdata(pdev);
365 if (drv) {
366 memset(drv, 0, sizeof(struct msm_iommu_ctx_drvdata));
367 kfree(drv);
368 }
369 return 0;
370}
371
372static struct platform_driver msm_iommu_driver = {
373 .driver = {
374 .name = "msm_iommu",
375 },
376 .probe = msm_iommu_probe,
377 .remove = msm_iommu_remove,
378};
379
380static struct platform_driver msm_iommu_ctx_driver = {
381 .driver = {
382 .name = "msm_iommu_ctx",
383 },
384 .probe = msm_iommu_ctx_probe,
385 .remove = msm_iommu_ctx_remove,
386};
387
388static int __init msm_iommu_driver_init(void)
389{
390 int ret;
391 ret = platform_driver_register(&msm_iommu_driver);
392 if (ret != 0) {
393 pr_err("Failed to register IOMMU driver\n");
394 goto error;
395 }
396
397 ret = platform_driver_register(&msm_iommu_ctx_driver);
398 if (ret != 0) {
399 platform_driver_unregister(&msm_iommu_driver);
400 pr_err("Failed to register IOMMU context driver\n");
401 goto error;
402 }
403
404error:
405 return ret;
406}
407
408static void __exit msm_iommu_driver_exit(void)
409{
410 platform_driver_unregister(&msm_iommu_ctx_driver);
411 platform_driver_unregister(&msm_iommu_driver);
412}
413
414subsys_initcall(msm_iommu_driver_init);
415module_exit(msm_iommu_driver_exit);
416
417MODULE_LICENSE("GPL v2");
418MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");