misc/genwqe/card_dev.c

43 static void genwqe_add_file(struct genwqe_dev *cd, struct genwqe_file *cfile)
47 	cfile->opener = get_pid(task_tgid(current));
49 	list_add(&cfile->list, &cd->file_list);
53 static int genwqe_del_file(struct genwqe_dev *cd, struct genwqe_file *cfile)
58 	list_del(&cfile->list);
60 	put_pid(cfile->opener);
65 static void genwqe_add_pin(struct genwqe_file *cfile, struct dma_mapping *m)
69 	spin_lock_irqsave(&cfile->pin_lock, flags);
70 	list_add(&m->pin_list, &cfile->pin_list);
71 	spin_unlock_irqrestore(&cfile->pin_lock, flags);
74 static int genwqe_del_pin(struct genwqe_file *cfile, struct dma_mapping *m)
78 	spin_lock_irqsave(&cfile->pin_lock, flags);
80 	spin_unlock_irqrestore(&cfile->pin_lock, flags);
87  * @cfile:	Descriptor of opened file
94 static struct dma_mapping *genwqe_search_pin(struct genwqe_file *cfile,
102 	spin_lock_irqsave(&cfile->pin_lock, flags);
104 	list_for_each_entry(m, &cfile->pin_list, pin_list) {
112 			spin_unlock_irqrestore(&cfile->pin_lock, flags);
116 	spin_unlock_irqrestore(&cfile->pin_lock, flags);
120 static void __genwqe_add_mapping(struct genwqe_file *cfile,
125 	spin_lock_irqsave(&cfile->map_lock, flags);
126 	list_add(&dma_map->card_list, &cfile->map_list);
127 	spin_unlock_irqrestore(&cfile->map_lock, flags);
130 static void __genwqe_del_mapping(struct genwqe_file *cfile,
135 	spin_lock_irqsave(&cfile->map_lock, flags);
137 	spin_unlock_irqrestore(&cfile->map_lock, flags);
143  * @cfile:	descriptor of opened file
150 static struct dma_mapping *__genwqe_search_mapping(struct genwqe_file *cfile,
158 	struct pci_dev *pci_dev = cfile->cd->pci_dev;
160 	spin_lock_irqsave(&cfile->map_lock, flags);
161 	list_for_each_entry(m, &cfile->map_list, card_list) {
176 			spin_unlock_irqrestore(&cfile->map_lock, flags);
180 	spin_unlock_irqrestore(&cfile->map_lock, flags);
189 static void genwqe_remove_mappings(struct genwqe_file *cfile)
194 	struct genwqe_dev *cd = cfile->cd;
195 	struct pci_dev *pci_dev = cfile->cd->pci_dev;
197 	list_for_each_safe(node, next, &cfile->map_list) {
228 static void genwqe_remove_pinnings(struct genwqe_file *cfile)
232 	struct genwqe_dev *cd = cfile->cd;
234 	list_for_each_safe(node, next, &cfile->pin_list) {
262 	struct genwqe_file *cfile;
265 	list_for_each_entry(cfile, &cd->file_list, list) {
266 		if (cfile->async_queue)
267 			kill_fasync(&cfile->async_queue, sig, POLL_HUP);
278 	struct genwqe_file *cfile;
281 	list_for_each_entry(cfile, &cd->file_list, list) {
282 		kill_pid(cfile->opener, SIGKILL, 1);
302 	struct genwqe_file *cfile;
304 	cfile = kzalloc(sizeof(*cfile), GFP_KERNEL);
305 	if (cfile == NULL)
309 	cfile->cd = cd;
310 	cfile->filp = filp;
311 	cfile->client = NULL;
313 	spin_lock_init(&cfile->map_lock);  /* list of raw memory allocations */
314 	INIT_LIST_HEAD(&cfile->map_list);
316 	spin_lock_init(&cfile->pin_lock);  /* list of user pinned memory */
317 	INIT_LIST_HEAD(&cfile->pin_list);
319 	filp->private_data = cfile;
321 	genwqe_add_file(cd, cfile);
359 	struct genwqe_file *cfile = (struct genwqe_file *)filp->private_data;
360 	struct genwqe_dev *cd = cfile->cd;
363 	genwqe_remove_mappings(cfile);
364 	genwqe_remove_pinnings(cfile);
370 	 * For this to work we must not release cd when this cfile is
374 	genwqe_del_file(cd, cfile);
375 	kfree(cfile);
399 	struct genwqe_file *cfile = vma->vm_private_data;
401 	dma_map = __genwqe_search_mapping(cfile, vma->vm_start, vsize,
410 	__genwqe_del_mapping(cfile, dma_map);
439 	struct genwqe_file *cfile = (struct genwqe_file *)filp->private_data;
440 	struct genwqe_dev *cd = cfile->cd;
478 	vma->vm_private_data = cfile;
480 	__genwqe_add_mapping(cfile, dma_map);
497  * @cfile:	Descriptor of opened file
502 static int do_flash_update(struct genwqe_file *cfile,
514 	struct genwqe_dev *cd = cfile->cd;
515 	struct file *filp = cfile->filp;
639 static int do_flash_read(struct genwqe_file *cfile,
649 	struct genwqe_dev *cd = cfile->cd;
650 	struct file *filp = cfile->filp;
769 static int genwqe_pin_mem(struct genwqe_file *cfile, struct genwqe_mem *m)
772 	struct genwqe_dev *cd = cfile->cd;
773 	struct pci_dev *pci_dev = cfile->cd->pci_dev;
799 	genwqe_add_pin(cfile, dma_map);
803 static int genwqe_unpin_mem(struct genwqe_file *cfile, struct genwqe_mem *m)
805 	struct genwqe_dev *cd = cfile->cd;
816 	dma_map = genwqe_search_pin(cfile, map_addr, map_size, NULL);
820 	genwqe_del_pin(cfile, dma_map);
828  * @cfile:	Descriptor of opened file
833 static int ddcb_cmd_cleanup(struct genwqe_file *cfile, struct ddcb_requ *req)
837 	struct genwqe_dev *cd = cfile->cd;
843 			__genwqe_del_mapping(cfile, dma_map);
854  * @cfile:	Descriptor of opened file
862 static int ddcb_cmd_fixups(struct genwqe_file *cfile, struct ddcb_requ *req)
866 	struct genwqe_dev *cd = cfile->cd;
903 			m = __genwqe_search_mapping(cfile, u_addr, u_size,
935 			m = genwqe_search_pin(cfile, u_addr, u_size, NULL);
953 				__genwqe_add_mapping(cfile, m);
980 	ddcb_cmd_cleanup(cfile, req);
986  * @cfile:	Descriptor of opened file
993 static int genwqe_execute_ddcb(struct genwqe_file *cfile,
997 	struct genwqe_dev *cd = cfile->cd;
998 	struct file *filp = cfile->filp;
1001 	rc = ddcb_cmd_fixups(cfile, req);
1006 	ddcb_cmd_cleanup(cfile, req);
1010 static int do_execute_ddcb(struct genwqe_file *cfile,
1015 	struct genwqe_dev *cd = cfile->cd;
1016 	struct file *filp = cfile->filp;
1028 		rc = genwqe_execute_ddcb(cfile, cmd);
1056 	struct genwqe_file *cfile = (struct genwqe_file *)filp->private_data;
1057 	struct genwqe_dev *cd = cfile->cd;
1163 		rc = do_flash_update(cfile, &load);
1183 		rc = do_flash_read(cfile, &load);
1198 		return genwqe_pin_mem(cfile, &m);
1207 		return genwqe_unpin_mem(cfile, &m);
1212 		return do_execute_ddcb(cfile, arg, 0);
1219 		return do_execute_ddcb(cfile, arg, 1);