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path: root/drivers/iommu/omap-iommu-debug.c
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Diffstat (limited to 'drivers/iommu/omap-iommu-debug.c')
-rw-r--r--drivers/iommu/omap-iommu-debug.c114
1 files changed, 0 insertions, 114 deletions
diff --git a/drivers/iommu/omap-iommu-debug.c b/drivers/iommu/omap-iommu-debug.c
index 80fffba7f12d..531658d17333 100644
--- a/drivers/iommu/omap-iommu-debug.c
+++ b/drivers/iommu/omap-iommu-debug.c
@@ -213,116 +213,6 @@ static ssize_t debug_read_pagetable(struct file *file, char __user *userbuf,
213 return bytes; 213 return bytes;
214} 214}
215 215
216static ssize_t debug_read_mmap(struct file *file, char __user *userbuf,
217 size_t count, loff_t *ppos)
218{
219 struct device *dev = file->private_data;
220 struct omap_iommu *obj = dev_to_omap_iommu(dev);
221 char *p, *buf;
222 struct iovm_struct *tmp;
223 int uninitialized_var(i);
224 ssize_t bytes;
225
226 buf = (char *)__get_free_page(GFP_KERNEL);
227 if (!buf)
228 return -ENOMEM;
229 p = buf;
230
231 p += sprintf(p, "%-3s %-8s %-8s %6s %8s\n",
232 "No", "start", "end", "size", "flags");
233 p += sprintf(p, "-------------------------------------------------\n");
234
235 mutex_lock(&iommu_debug_lock);
236
237 list_for_each_entry(tmp, &obj->mmap, list) {
238 size_t len;
239 const char *str = "%3d %08x-%08x %6x %8x\n";
240 const int maxcol = 39;
241
242 len = tmp->da_end - tmp->da_start;
243 p += snprintf(p, maxcol, str,
244 i, tmp->da_start, tmp->da_end, len, tmp->flags);
245
246 if (PAGE_SIZE - (p - buf) < maxcol)
247 break;
248 i++;
249 }
250
251 bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
252
253 mutex_unlock(&iommu_debug_lock);
254 free_page((unsigned long)buf);
255
256 return bytes;
257}
258
259static ssize_t debug_read_mem(struct file *file, char __user *userbuf,
260 size_t count, loff_t *ppos)
261{
262 struct device *dev = file->private_data;
263 char *p, *buf;
264 struct iovm_struct *area;
265 ssize_t bytes;
266
267 count = min_t(ssize_t, count, PAGE_SIZE);
268
269 buf = (char *)__get_free_page(GFP_KERNEL);
270 if (!buf)
271 return -ENOMEM;
272 p = buf;
273
274 mutex_lock(&iommu_debug_lock);
275
276 area = omap_find_iovm_area(dev, (u32)ppos);
277 if (!area) {
278 bytes = -EINVAL;
279 goto err_out;
280 }
281 memcpy(p, area->va, count);
282 p += count;
283
284 bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
285err_out:
286 mutex_unlock(&iommu_debug_lock);
287 free_page((unsigned long)buf);
288
289 return bytes;
290}
291
292static ssize_t debug_write_mem(struct file *file, const char __user *userbuf,
293 size_t count, loff_t *ppos)
294{
295 struct device *dev = file->private_data;
296 struct iovm_struct *area;
297 char *p, *buf;
298
299 count = min_t(size_t, count, PAGE_SIZE);
300
301 buf = (char *)__get_free_page(GFP_KERNEL);
302 if (!buf)
303 return -ENOMEM;
304 p = buf;
305
306 mutex_lock(&iommu_debug_lock);
307
308 if (copy_from_user(p, userbuf, count)) {
309 count = -EFAULT;
310 goto err_out;
311 }
312
313 area = omap_find_iovm_area(dev, (u32)ppos);
314 if (!area) {
315 count = -EINVAL;
316 goto err_out;
317 }
318 memcpy(area->va, p, count);
319err_out:
320 mutex_unlock(&iommu_debug_lock);
321 free_page((unsigned long)buf);
322
323 return count;
324}
325
326#define DEBUG_FOPS(name) \ 216#define DEBUG_FOPS(name) \
327 static const struct file_operations debug_##name##_fops = { \ 217 static const struct file_operations debug_##name##_fops = { \
328 .open = simple_open, \ 218 .open = simple_open, \
@@ -342,8 +232,6 @@ DEBUG_FOPS_RO(ver);
342DEBUG_FOPS_RO(regs); 232DEBUG_FOPS_RO(regs);
343DEBUG_FOPS_RO(tlb); 233DEBUG_FOPS_RO(tlb);
344DEBUG_FOPS(pagetable); 234DEBUG_FOPS(pagetable);
345DEBUG_FOPS_RO(mmap);
346DEBUG_FOPS(mem);
347 235
348#define __DEBUG_ADD_FILE(attr, mode) \ 236#define __DEBUG_ADD_FILE(attr, mode) \
349 { \ 237 { \
@@ -389,8 +277,6 @@ static int iommu_debug_register(struct device *dev, void *data)
389 DEBUG_ADD_FILE_RO(regs); 277 DEBUG_ADD_FILE_RO(regs);
390 DEBUG_ADD_FILE_RO(tlb); 278 DEBUG_ADD_FILE_RO(tlb);
391 DEBUG_ADD_FILE(pagetable); 279 DEBUG_ADD_FILE(pagetable);
392 DEBUG_ADD_FILE_RO(mmap);
393 DEBUG_ADD_FILE(mem);
394 280
395 return 0; 281 return 0;
396 282