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Diffstat (limited to 'arch/um/kernel/irq.c')
-rw-r--r--arch/um/kernel/irq.c93
1 files changed, 47 insertions, 46 deletions
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index c39ea3abeda..2ffda012385 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -89,16 +89,18 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
89 struct irq_fd *irq_fd; 89 struct irq_fd *irq_fd;
90 int n; 90 int n;
91 91
92 if(smp_sigio_handler()) return; 92 if (smp_sigio_handler())
93 while(1){ 93 return;
94
95 while (1) {
94 n = os_waiting_for_events(active_fds); 96 n = os_waiting_for_events(active_fds);
95 if (n <= 0) { 97 if (n <= 0) {
96 if(n == -EINTR) continue; 98 if(n == -EINTR) continue;
97 else break; 99 else break;
98 } 100 }
99 101
100 for(irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next){ 102 for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
101 if(irq_fd->current_events != 0){ 103 if (irq_fd->current_events != 0) {
102 irq_fd->current_events = 0; 104 irq_fd->current_events = 0;
103 do_IRQ(irq_fd->irq, regs); 105 do_IRQ(irq_fd->irq, regs);
104 } 106 }
@@ -110,19 +112,17 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
110 112
111static void maybe_sigio_broken(int fd, int type) 113static void maybe_sigio_broken(int fd, int type)
112{ 114{
113 if(os_isatty(fd)){ 115 if (os_isatty(fd)) {
114 if((type == IRQ_WRITE) && !pty_output_sigio){ 116 if ((type == IRQ_WRITE) && !pty_output_sigio) {
115 write_sigio_workaround(); 117 write_sigio_workaround();
116 add_sigio_fd(fd, 0); 118 add_sigio_fd(fd, 0);
117 } 119 } else if ((type == IRQ_READ) && !pty_close_sigio) {
118 else if((type == IRQ_READ) && !pty_close_sigio){
119 write_sigio_workaround(); 120 write_sigio_workaround();
120 add_sigio_fd(fd, 1); 121 add_sigio_fd(fd, 1);
121 } 122 }
122 } 123 }
123} 124}
124 125
125
126int activate_fd(int irq, int fd, int type, void *dev_id) 126int activate_fd(int irq, int fd, int type, void *dev_id)
127{ 127{
128 struct pollfd *tmp_pfd; 128 struct pollfd *tmp_pfd;
@@ -132,16 +132,18 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
132 132
133 pid = os_getpid(); 133 pid = os_getpid();
134 err = os_set_fd_async(fd, pid); 134 err = os_set_fd_async(fd, pid);
135 if(err < 0) 135 if (err < 0)
136 goto out; 136 goto out;
137 137
138 new_fd = um_kmalloc(sizeof(*new_fd)); 138 new_fd = um_kmalloc(sizeof(*new_fd));
139 err = -ENOMEM; 139 err = -ENOMEM;
140 if(new_fd == NULL) 140 if (new_fd == NULL)
141 goto out; 141 goto out;
142 142
143 if(type == IRQ_READ) events = UM_POLLIN | UM_POLLPRI; 143 if (type == IRQ_READ)
144 else events = UM_POLLOUT; 144 events = UM_POLLIN | UM_POLLPRI;
145 else
146 events = UM_POLLOUT;
145 *new_fd = ((struct irq_fd) { .next = NULL, 147 *new_fd = ((struct irq_fd) { .next = NULL,
146 .id = dev_id, 148 .id = dev_id,
147 .fd = fd, 149 .fd = fd,
@@ -165,8 +167,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
165 * a semaphore. 167 * a semaphore.
166 */ 168 */
167 flags = irq_lock(); 169 flags = irq_lock();
168 for(irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next){ 170 for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
169 if((irq_fd->fd == fd) && (irq_fd->type == type)){ 171 if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
170 printk("Registering fd %d twice\n", fd); 172 printk("Registering fd %d twice\n", fd);
171 printk("Irqs : %d, %d\n", irq_fd->irq, irq); 173 printk("Irqs : %d, %d\n", irq_fd->irq, irq);
172 printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id); 174 printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id);
@@ -175,13 +177,13 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
175 } 177 }
176 178
177 /*-------------*/ 179 /*-------------*/
178 if(type == IRQ_WRITE) 180 if (type == IRQ_WRITE)
179 fd = -1; 181 fd = -1;
180 182
181 tmp_pfd = NULL; 183 tmp_pfd = NULL;
182 n = 0; 184 n = 0;
183 185
184 while(1){ 186 while (1) {
185 n = os_create_pollfd(fd, events, tmp_pfd, n); 187 n = os_create_pollfd(fd, events, tmp_pfd, n);
186 if (n == 0) 188 if (n == 0)
187 break; 189 break;
@@ -198,10 +200,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
198 * then we free the buffer tmp_fds and try again. 200 * then we free the buffer tmp_fds and try again.
199 */ 201 */
200 irq_unlock(flags); 202 irq_unlock(flags);
201 if (tmp_pfd != NULL) { 203 kfree(tmp_pfd);
202 kfree(tmp_pfd); 204 tmp_pfd = NULL;
203 tmp_pfd = NULL;
204 }
205 205
206 tmp_pfd = um_kmalloc(n); 206 tmp_pfd = um_kmalloc(n);
207 if (tmp_pfd == NULL) 207 if (tmp_pfd == NULL)
@@ -249,7 +249,7 @@ static int same_irq_and_dev(struct irq_fd *irq, void *d)
249{ 249{
250 struct irq_and_dev *data = d; 250 struct irq_and_dev *data = d;
251 251
252 return((irq->irq == data->irq) && (irq->id == data->dev)); 252 return ((irq->irq == data->irq) && (irq->id == data->dev));
253} 253}
254 254
255void free_irq_by_irq_and_dev(unsigned int irq, void *dev) 255void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
@@ -262,7 +262,7 @@ void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
262 262
263static int same_fd(struct irq_fd *irq, void *fd) 263static int same_fd(struct irq_fd *irq, void *fd)
264{ 264{
265 return(irq->fd == *((int *) fd)); 265 return (irq->fd == *((int *)fd));
266} 266}
267 267
268void free_irq_by_fd(int fd) 268void free_irq_by_fd(int fd)
@@ -276,16 +276,17 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
276 int i = 0; 276 int i = 0;
277 int fdi; 277 int fdi;
278 278
279 for(irq=active_fds; irq != NULL; irq = irq->next){ 279 for (irq = active_fds; irq != NULL; irq = irq->next) {
280 if((irq->fd == fd) && (irq->irq == irqnum)) break; 280 if ((irq->fd == fd) && (irq->irq == irqnum))
281 break;
281 i++; 282 i++;
282 } 283 }
283 if(irq == NULL){ 284 if (irq == NULL) {
284 printk("find_irq_by_fd doesn't have descriptor %d\n", fd); 285 printk("find_irq_by_fd doesn't have descriptor %d\n", fd);
285 goto out; 286 goto out;
286 } 287 }
287 fdi = os_get_pollfd(i); 288 fdi = os_get_pollfd(i);
288 if((fdi != -1) && (fdi != fd)){ 289 if ((fdi != -1) && (fdi != fd)) {
289 printk("find_irq_by_fd - mismatch between active_fds and " 290 printk("find_irq_by_fd - mismatch between active_fds and "
290 "pollfds, fd %d vs %d, need %d\n", irq->fd, 291 "pollfds, fd %d vs %d, need %d\n", irq->fd,
291 fdi, fd); 292 fdi, fd);
@@ -294,7 +295,7 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
294 } 295 }
295 *index_out = i; 296 *index_out = i;
296 out: 297 out:
297 return(irq); 298 return irq;
298} 299}
299 300
300void reactivate_fd(int fd, int irqnum) 301void reactivate_fd(int fd, int irqnum)
@@ -305,7 +306,7 @@ void reactivate_fd(int fd, int irqnum)
305 306
306 flags = irq_lock(); 307 flags = irq_lock();
307 irq = find_irq_by_fd(fd, irqnum, &i); 308 irq = find_irq_by_fd(fd, irqnum, &i);
308 if(irq == NULL){ 309 if (irq == NULL) {
309 irq_unlock(flags); 310 irq_unlock(flags);
310 return; 311 return;
311 } 312 }
@@ -326,7 +327,7 @@ void deactivate_fd(int fd, int irqnum)
326 327
327 flags = irq_lock(); 328 flags = irq_lock();
328 irq = find_irq_by_fd(fd, irqnum, &i); 329 irq = find_irq_by_fd(fd, irqnum, &i);
329 if(irq == NULL) 330 if (irq == NULL)
330 goto out; 331 goto out;
331 os_set_pollfd(i, -1); 332 os_set_pollfd(i, -1);
332 out: 333 out:
@@ -338,15 +339,15 @@ int deactivate_all_fds(void)
338 struct irq_fd *irq; 339 struct irq_fd *irq;
339 int err; 340 int err;
340 341
341 for(irq=active_fds;irq != NULL;irq = irq->next){ 342 for (irq = active_fds; irq != NULL; irq = irq->next) {
342 err = os_clear_fd_async(irq->fd); 343 err = os_clear_fd_async(irq->fd);
343 if(err) 344 if (err)
344 return(err); 345 return err;
345 } 346 }
346 /* If there is a signal already queued, after unblocking ignore it */ 347 /* If there is a signal already queued, after unblocking ignore it */
347 os_set_ioignore(); 348 os_set_ioignore();
348 349
349 return(0); 350 return 0;
350} 351}
351 352
352void forward_interrupts(int pid) 353void forward_interrupts(int pid)
@@ -356,9 +357,9 @@ void forward_interrupts(int pid)
356 int err; 357 int err;
357 358
358 flags = irq_lock(); 359 flags = irq_lock();
359 for(irq=active_fds;irq != NULL;irq = irq->next){ 360 for (irq = active_fds; irq != NULL; irq = irq->next) {
360 err = os_set_owner(irq->fd, pid); 361 err = os_set_owner(irq->fd, pid);
361 if(err < 0){ 362 if (err < 0) {
362 /* XXX Just remove the irq rather than 363 /* XXX Just remove the irq rather than
363 * print out an infinite stream of these 364 * print out an infinite stream of these
364 */ 365 */
@@ -379,7 +380,7 @@ void forward_interrupts(int pid)
379unsigned int do_IRQ(int irq, union uml_pt_regs *regs) 380unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
380{ 381{
381 irq_enter(); 382 irq_enter();
382 __do_IRQ(irq, (struct pt_regs *) regs); 383 __do_IRQ(irq, (struct pt_regs *)regs);
383 irq_exit(); 384 irq_exit();
384 return 1; 385 return 1;
385} 386}
@@ -392,12 +393,12 @@ int um_request_irq(unsigned int irq, int fd, int type,
392 int err; 393 int err;
393 394
394 err = request_irq(irq, handler, irqflags, devname, dev_id); 395 err = request_irq(irq, handler, irqflags, devname, dev_id);
395 if(err) 396 if (err)
396 return(err); 397 return err;
397 398
398 if(fd != -1) 399 if (fd != -1)
399 err = activate_fd(irq, fd, type, dev_id); 400 err = activate_fd(irq, fd, type, dev_id);
400 return(err); 401 return err;
401} 402}
402EXPORT_SYMBOL(um_request_irq); 403EXPORT_SYMBOL(um_request_irq);
403EXPORT_SYMBOL(reactivate_fd); 404EXPORT_SYMBOL(reactivate_fd);
@@ -409,7 +410,7 @@ unsigned long irq_lock(void)
409 unsigned long flags; 410 unsigned long flags;
410 411
411 spin_lock_irqsave(&irq_spinlock, flags); 412 spin_lock_irqsave(&irq_spinlock, flags);
412 return(flags); 413 return flags;
413} 414}
414 415
415void irq_unlock(unsigned long flags) 416void irq_unlock(unsigned long flags)
@@ -452,7 +453,7 @@ void __init init_IRQ(void)
452 irq_desc[TIMER_IRQ].depth = 1; 453 irq_desc[TIMER_IRQ].depth = 1;
453 irq_desc[TIMER_IRQ].handler = &SIGVTALRM_irq_type; 454 irq_desc[TIMER_IRQ].handler = &SIGVTALRM_irq_type;
454 enable_irq(TIMER_IRQ); 455 enable_irq(TIMER_IRQ);
455 for(i=1;i<NR_IRQS;i++){ 456 for (i = 1; i < NR_IRQS; i++) {
456 irq_desc[i].status = IRQ_DISABLED; 457 irq_desc[i].status = IRQ_DISABLED;
457 irq_desc[i].action = NULL; 458 irq_desc[i].action = NULL;
458 irq_desc[i].depth = 1; 459 irq_desc[i].depth = 1;
@@ -467,7 +468,7 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
467 int fds[2], err; 468 int fds[2], err;
468 469
469 err = os_pipe(fds, 1, 1); 470 err = os_pipe(fds, 1, 1);
470 if(err){ 471 if (err) {
471 printk("init_aio_irq - os_pipe failed, err = %d\n", -err); 472 printk("init_aio_irq - os_pipe failed, err = %d\n", -err);
472 goto out; 473 goto out;
473 } 474 }
@@ -475,7 +476,7 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
475 err = um_request_irq(irq, fds[0], IRQ_READ, handler, 476 err = um_request_irq(irq, fds[0], IRQ_READ, handler,
476 SA_INTERRUPT | SA_SAMPLE_RANDOM, name, 477 SA_INTERRUPT | SA_SAMPLE_RANDOM, name,
477 (void *) (long) fds[0]); 478 (void *) (long) fds[0]);
478 if(err){ 479 if (err) {
479 printk("init_aio_irq - : um_request_irq failed, err = %d\n", 480 printk("init_aio_irq - : um_request_irq failed, err = %d\n",
480 err); 481 err);
481 goto out_close; 482 goto out_close;
@@ -488,5 +489,5 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
488 os_close_file(fds[0]); 489 os_close_file(fds[0]);
489 os_close_file(fds[1]); 490 os_close_file(fds[1]);
490 out: 491 out:
491 return(err); 492 return err;
492} 493}