2 * Copyright (C) 2016 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
11 struct blk_driver *blk_driver_lookup_type(int if_type)
13 struct blk_driver *drv = ll_entry_start(struct blk_driver, blk_driver);
14 const int n_ents = ll_entry_count(struct blk_driver, blk_driver);
15 struct blk_driver *entry;
17 for (entry = drv; entry != drv + n_ents; entry++) {
18 if (if_type == entry->if_type)
26 static struct blk_driver *blk_driver_lookup_typename(const char *if_typename)
28 struct blk_driver *drv = ll_entry_start(struct blk_driver, blk_driver);
29 const int n_ents = ll_entry_count(struct blk_driver, blk_driver);
30 struct blk_driver *entry;
32 for (entry = drv; entry != drv + n_ents; entry++) {
33 if (!strcmp(if_typename, entry->if_typename))
42 * get_desc() - Get the block device descriptor for the given device number
44 * @drv: Legacy block driver
45 * @devnum: Device number (0 = first)
46 * @descp: Returns block device descriptor on success
47 * @return 0 on success, -ENODEV if there is no such device, -ENOSYS if the
48 * driver does not provide a way to find a device, or other -ve on other
51 static int get_desc(struct blk_driver *drv, int devnum, struct blk_desc **descp)
54 if (devnum < 0 || devnum >= drv->max_devs)
56 *descp = &drv->desc[devnum];
62 return drv->get_dev(devnum, descp);
65 #ifdef HAVE_BLOCK_DEVICE
66 int blk_list_part(enum if_type if_type)
68 struct blk_driver *drv;
69 struct blk_desc *desc;
73 drv = blk_driver_lookup_type(if_type);
76 for (ok = 0, devnum = 0; devnum < drv->max_devs; ++devnum) {
77 if (get_desc(drv, devnum, &desc))
79 if (desc->part_type != PART_TYPE_UNKNOWN) {
93 int blk_print_part_devnum(enum if_type if_type, int devnum)
95 struct blk_driver *drv = blk_driver_lookup_type(if_type);
96 struct blk_desc *desc;
101 ret = get_desc(drv, devnum, &desc);
104 if (desc->type == DEV_TYPE_UNKNOWN)
111 void blk_list_devices(enum if_type if_type)
113 struct blk_driver *drv = blk_driver_lookup_type(if_type);
114 struct blk_desc *desc;
119 for (i = 0; i < drv->max_devs; ++i) {
120 if (get_desc(drv, i, &desc))
122 if (desc->type == DEV_TYPE_UNKNOWN)
123 continue; /* list only known devices */
124 printf("Device %d: ", i);
129 int blk_print_device_num(enum if_type if_type, int devnum)
131 struct blk_driver *drv = blk_driver_lookup_type(if_type);
132 struct blk_desc *desc;
137 ret = get_desc(drv, devnum, &desc);
140 printf("\n%s device %d: ", drv->if_typename, devnum);
146 int blk_show_device(enum if_type if_type, int devnum)
148 struct blk_driver *drv = blk_driver_lookup_type(if_type);
149 struct blk_desc *desc;
154 printf("\nDevice %d: ", devnum);
155 if (devnum >= drv->max_devs) {
156 puts("unknown device\n");
159 ret = get_desc(drv, devnum, &desc);
164 if (desc->type == DEV_TYPE_UNKNOWN)
169 #endif /* HAVE_BLOCK_DEVICE */
171 struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum)
173 struct blk_driver *drv = blk_driver_lookup_type(if_type);
174 struct blk_desc *desc;
179 if (get_desc(drv, devnum, &desc))
185 int blk_dselect_hwpart(struct blk_desc *desc, int hwpart)
187 struct blk_driver *drv = blk_driver_lookup_type(desc->if_type);
191 if (drv->select_hwpart)
192 return drv->select_hwpart(desc, hwpart);
197 struct blk_desc *blk_get_devnum_by_typename(const char *if_typename, int devnum)
199 struct blk_driver *drv = blk_driver_lookup_typename(if_typename);
200 struct blk_desc *desc;
205 if (get_desc(drv, devnum, &desc))
211 ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
212 lbaint_t blkcnt, void *buffer)
214 struct blk_driver *drv = blk_driver_lookup_type(if_type);
215 struct blk_desc *desc;
221 ret = get_desc(drv, devnum, &desc);
224 n = desc->block_read(desc, start, blkcnt, buffer);
228 /* flush cache after read */
229 flush_cache((ulong)buffer, blkcnt * desc->blksz);
234 ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
235 lbaint_t blkcnt, const void *buffer)
237 struct blk_driver *drv = blk_driver_lookup_type(if_type);
238 struct blk_desc *desc;
243 ret = get_desc(drv, devnum, &desc);
246 return desc->block_write(desc, start, blkcnt, buffer);
249 int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart)
251 struct blk_driver *drv = blk_driver_lookup_type(if_type);
252 struct blk_desc *desc;
257 ret = get_desc(drv, devnum, &desc);
260 return drv->select_hwpart(desc, hwpart);