Lines Matching +full:dma +full:- +full:router
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved.
7 * This code implements the DMA subsystem. It provides a HW-neutral interface
9 * if present, and allows different HW DMA drivers to register as providing
29 * See Documentation/driver-api/dmaengine for more details
35 #include <linux/dma-mapping.h>
63 /* --- debugfs implementation --- */
71 dma_dev->dbg_dev_root = debugfs_create_dir(dev_name(dma_dev->dev), in dmaengine_debug_register()
73 if (IS_ERR(dma_dev->dbg_dev_root)) in dmaengine_debug_register()
74 dma_dev->dbg_dev_root = NULL; in dmaengine_debug_register()
79 debugfs_remove_recursive(dma_dev->dbg_dev_root); in dmaengine_debug_unregister()
80 dma_dev->dbg_dev_root = NULL; in dmaengine_debug_unregister()
88 list_for_each_entry(chan, &dma_dev->channels, device_node) { in dmaengine_dbg_summary_show()
89 if (chan->client_count) { in dmaengine_dbg_summary_show()
90 seq_printf(s, " %-13s| %s", dma_chan_name(chan), in dmaengine_dbg_summary_show()
91 chan->dbg_client_name ?: "in-use"); in dmaengine_dbg_summary_show()
93 if (chan->router) in dmaengine_dbg_summary_show()
94 seq_printf(s, " (via router: %s)\n", in dmaengine_dbg_summary_show()
95 dev_name(chan->router->dev)); in dmaengine_dbg_summary_show()
108 seq_printf(s, "dma%d (%s): number of channels: %u\n", in dmaengine_summary_show()
109 dma_dev->dev_id, dev_name(dma_dev->dev), in dmaengine_summary_show()
110 dma_dev->chancnt); in dmaengine_summary_show()
112 if (dma_dev->dbg_summary_show) in dmaengine_summary_show()
113 dma_dev->dbg_summary_show(s, dma_dev); in dmaengine_summary_show()
117 if (!list_is_last(&dma_dev->global_node, &dma_device_list)) in dmaengine_summary_show()
144 /* --- sysfs implementation --- */
149 * dev_to_dma_chan - convert a device pointer to its sysfs container object
159 return chan_dev->chan; in dev_to_dma_chan()
174 count += per_cpu_ptr(chan->local, i)->memcpy_count; in memcpy_count_show()
177 err = -ENODEV; in memcpy_count_show()
196 count += per_cpu_ptr(chan->local, i)->bytes_transferred; in bytes_transferred_show()
199 err = -ENODEV; in bytes_transferred_show()
215 err = sprintf(buf, "%d\n", chan->client_count); in in_use_show()
217 err = -ENODEV; in in_use_show()
241 .name = "dma",
246 /* --- client and device registration --- */
252 * struct dma_chan_tbl_ent - tracks channel allocations per core/operation
259 /* percpu lookup table for memory-to-memory offload providers */
280 err = -ENOMEM; in dma_channel_table_init()
296 * dma_chan_is_local - checks if the channel is in the same NUMA-node as the CPU
297 * @chan: DMA channel to test
300 * Returns true if the channel is in the same NUMA-node as the CPU.
304 int node = dev_to_node(chan->device->dev); in dma_chan_is_local()
310 * min_chan - finds the channel with min count and in the same NUMA-node as the CPU
328 if (!dma_has_cap(cap, device->cap_mask) || in min_chan()
329 dma_has_cap(DMA_PRIVATE, device->cap_mask)) in min_chan()
331 list_for_each_entry(chan, &device->channels, device_node) { in min_chan()
332 if (!chan->client_count) in min_chan()
334 if (!min || chan->table_count < min->table_count) in min_chan()
339 chan->table_count < localmin->table_count) in min_chan()
347 chan->table_count++; in min_chan()
353 * dma_channel_rebalance - redistribute the available channels
357 * multi-tasking channels) in the non-SMP case.
371 per_cpu_ptr(channel_table[cap], cpu)->chan = NULL; in dma_channel_rebalance()
374 if (dma_has_cap(DMA_PRIVATE, device->cap_mask)) in dma_channel_rebalance()
376 list_for_each_entry(chan, &device->channels, device_node) in dma_channel_rebalance()
377 chan->table_count = 0; in dma_channel_rebalance()
388 per_cpu_ptr(channel_table[cap], cpu)->chan = chan; in dma_channel_rebalance()
397 bitmap_and(has.bits, want->bits, device->cap_mask.bits, in dma_device_satisfies_mask()
399 return bitmap_equal(want->bits, has.bits, DMA_TX_TYPE_END); in dma_device_satisfies_mask()
404 return chan->device->owner; in dma_chan_to_owner()
408 * balance_ref_count - catch up the channel reference count
409 * @chan: channel to balance ->client_count versus dmaengine_ref_count
417 while (chan->client_count < dmaengine_ref_count) { in balance_ref_count()
419 chan->client_count++; in balance_ref_count()
427 list_del_rcu(&device->global_node); in dma_device_release()
430 if (device->device_release) in dma_device_release()
431 device->device_release(device); in dma_device_release()
437 kref_put(&device->ref, dma_device_release); in dma_device_put()
441 * dma_chan_get - try to grab a DMA channel's parent driver module
452 if (chan->client_count) { in dma_chan_get()
454 chan->client_count++; in dma_chan_get()
459 return -ENODEV; in dma_chan_get()
461 ret = kref_get_unless_zero(&chan->device->ref); in dma_chan_get()
463 ret = -ENODEV; in dma_chan_get()
468 if (chan->device->device_alloc_chan_resources) { in dma_chan_get()
469 ret = chan->device->device_alloc_chan_resources(chan); in dma_chan_get()
474 chan->client_count++; in dma_chan_get()
476 if (!dma_has_cap(DMA_PRIVATE, chan->device->cap_mask)) in dma_chan_get()
482 dma_device_put(chan->device); in dma_chan_get()
489 * dma_chan_put - drop a reference to a DMA channel's parent driver module
497 if (!chan->client_count) in dma_chan_put()
500 chan->client_count--; in dma_chan_put()
503 if (!chan->client_count && chan->device->device_free_chan_resources) { in dma_chan_put()
506 chan->device->device_free_chan_resources(chan); in dma_chan_put()
509 /* If the channel is used via a DMA request router, free the mapping */ in dma_chan_put()
510 if (chan->router && chan->router->route_free) { in dma_chan_put()
511 chan->router->route_free(chan->router->dev, chan->route_data); in dma_chan_put()
512 chan->router = NULL; in dma_chan_put()
513 chan->route_data = NULL; in dma_chan_put()
516 dma_device_put(chan->device); in dma_chan_put()
529 dev_err(chan->device->dev, "%s: timeout!\n", __func__); in dma_sync_wait()
542 * dma_find_channel - find a channel to carry out the operation
547 return this_cpu_read(channel_table[tx_type]->chan); in dma_find_channel()
552 * dma_issue_pending_all - flush all pending operations across all channels
561 if (dma_has_cap(DMA_PRIVATE, device->cap_mask)) in dma_issue_pending_all()
563 list_for_each_entry(chan, &device->channels, device_node) in dma_issue_pending_all()
564 if (chan->client_count) in dma_issue_pending_all()
565 device->device_issue_pending(chan); in dma_issue_pending_all()
576 return -EINVAL; in dma_get_slave_caps()
578 device = chan->device; in dma_get_slave_caps()
581 if (!(test_bit(DMA_SLAVE, device->cap_mask.bits) || in dma_get_slave_caps()
582 test_bit(DMA_CYCLIC, device->cap_mask.bits))) in dma_get_slave_caps()
583 return -ENXIO; in dma_get_slave_caps()
590 if (!device->directions) in dma_get_slave_caps()
591 return -ENXIO; in dma_get_slave_caps()
593 caps->src_addr_widths = device->src_addr_widths; in dma_get_slave_caps()
594 caps->dst_addr_widths = device->dst_addr_widths; in dma_get_slave_caps()
595 caps->directions = device->directions; in dma_get_slave_caps()
596 caps->min_burst = device->min_burst; in dma_get_slave_caps()
597 caps->max_burst = device->max_burst; in dma_get_slave_caps()
598 caps->max_sg_burst = device->max_sg_burst; in dma_get_slave_caps()
599 caps->residue_granularity = device->residue_granularity; in dma_get_slave_caps()
600 caps->descriptor_reuse = device->descriptor_reuse; in dma_get_slave_caps()
601 caps->cmd_pause = !!device->device_pause; in dma_get_slave_caps()
602 caps->cmd_resume = !!device->device_resume; in dma_get_slave_caps()
603 caps->cmd_terminate = !!device->device_terminate_all; in dma_get_slave_caps()
606 * DMA engine device might be configured with non-uniformly in dma_get_slave_caps()
610 * channel-specific ones. in dma_get_slave_caps()
612 if (device->device_caps) in dma_get_slave_caps()
613 device->device_caps(chan, caps); in dma_get_slave_caps()
626 dev_dbg(dev->dev, "%s: wrong capabilities\n", __func__); in private_candidate()
632 if (dev->chancnt > 1 && !dma_has_cap(DMA_PRIVATE, dev->cap_mask)) in private_candidate()
633 list_for_each_entry(chan, &dev->channels, device_node) { in private_candidate()
635 if (chan->client_count) in private_candidate()
639 list_for_each_entry(chan, &dev->channels, device_node) { in private_candidate()
640 if (chan->client_count) { in private_candidate()
641 dev_dbg(dev->dev, "%s: %s busy\n", in private_candidate()
646 dev_dbg(dev->dev, "%s: %s filter said false\n", in private_candidate()
666 * channel will not be published in the general-purpose in find_candidate()
669 dma_cap_set(DMA_PRIVATE, device->cap_mask); in find_candidate()
670 device->privatecnt++; in find_candidate()
674 if (err == -ENODEV) { in find_candidate()
675 dev_dbg(device->dev, "%s: %s module removed\n", in find_candidate()
677 list_del_rcu(&device->global_node); in find_candidate()
679 dev_dbg(device->dev, in find_candidate()
683 if (--device->privatecnt == 0) in find_candidate()
684 dma_cap_clear(DMA_PRIVATE, device->cap_mask); in find_candidate()
690 return chan ? chan : ERR_PTR(-EPROBE_DEFER); in find_candidate()
694 * dma_get_slave_channel - try to get specific channel exclusively
699 int err = -EBUSY; in dma_get_slave_channel()
704 if (chan->client_count == 0) { in dma_get_slave_channel()
705 struct dma_device *device = chan->device; in dma_get_slave_channel()
707 dma_cap_set(DMA_PRIVATE, device->cap_mask); in dma_get_slave_channel()
708 device->privatecnt++; in dma_get_slave_channel()
711 dev_dbg(chan->device->dev, in dma_get_slave_channel()
715 if (--device->privatecnt == 0) in dma_get_slave_channel()
716 dma_cap_clear(DMA_PRIVATE, device->cap_mask); in dma_get_slave_channel()
748 * __dma_request_channel - try to allocate an exclusive channel
752 * @np: device node to look for DMA channels
754 * Returns pointer to appropriate DMA channel on success or NULL.
766 /* Finds a DMA controller with matching device node */ in __dma_request_channel()
767 if (np && device->dev->of_node && np != device->dev->of_node) in __dma_request_channel()
793 if (!device->filter.mapcnt) in dma_filter_match()
796 for (i = 0; i < device->filter.mapcnt; i++) { in dma_filter_match()
797 const struct dma_slave_map *map = &device->filter.map[i]; in dma_filter_match()
799 if (!strcmp(map->devname, dev_name(dev)) && in dma_filter_match()
800 !strcmp(map->slave, name)) in dma_filter_match()
808 * dma_request_chan - try to allocate an exclusive slave channel
812 * Returns pointer to appropriate DMA channel on success or an error pointer.
819 /* If device-tree is present get slave info from here */ in dma_request_chan()
820 if (dev->of_node) in dma_request_chan()
821 chan = of_dma_request_slave_channel(dev->of_node, name); in dma_request_chan()
827 if (PTR_ERR(chan) == -EPROBE_DEFER) in dma_request_chan()
833 /* Try to find the channel via the DMA filter map(s) */ in dma_request_chan()
845 chan = find_candidate(d, &mask, d->filter.fn, map->param); in dma_request_chan()
854 return ERR_PTR(-EPROBE_DEFER); in dma_request_chan()
858 chan->dbg_client_name = kasprintf(GFP_KERNEL, "%s:%s", dev_name(dev), in dma_request_chan()
862 chan->name = kasprintf(GFP_KERNEL, "dma:%s", name); in dma_request_chan()
863 if (!chan->name) in dma_request_chan()
865 chan->slave = dev; in dma_request_chan()
867 if (sysfs_create_link(&chan->dev->device.kobj, &dev->kobj, in dma_request_chan()
869 dev_warn(dev, "Cannot create DMA %s symlink\n", DMA_SLAVE_NAME); in dma_request_chan()
870 if (sysfs_create_link(&dev->kobj, &chan->dev->device.kobj, chan->name)) in dma_request_chan()
871 dev_warn(dev, "Cannot create DMA %s symlink\n", chan->name); in dma_request_chan()
878 * dma_request_chan_by_mask - allocate a channel satisfying certain capabilities
881 * Returns pointer to appropriate DMA channel on success or an error pointer.
888 return ERR_PTR(-ENODEV); in dma_request_chan_by_mask()
894 chan = ERR_PTR(-EPROBE_DEFER); in dma_request_chan_by_mask()
896 chan = ERR_PTR(-ENODEV); in dma_request_chan_by_mask()
907 WARN_ONCE(chan->client_count != 1, in dma_release_channel()
908 "chan reference count %d != 1\n", chan->client_count); in dma_release_channel()
911 if (--chan->device->privatecnt == 0) in dma_release_channel()
912 dma_cap_clear(DMA_PRIVATE, chan->device->cap_mask); in dma_release_channel()
914 if (chan->slave) { in dma_release_channel()
915 sysfs_remove_link(&chan->dev->device.kobj, DMA_SLAVE_NAME); in dma_release_channel()
916 sysfs_remove_link(&chan->slave->kobj, chan->name); in dma_release_channel()
917 kfree(chan->name); in dma_release_channel()
918 chan->name = NULL; in dma_release_channel()
919 chan->slave = NULL; in dma_release_channel()
923 kfree(chan->dbg_client_name); in dma_release_channel()
924 chan->dbg_client_name = NULL; in dma_release_channel()
931 * dmaengine_get - register interest in dma_channels
944 if (dma_has_cap(DMA_PRIVATE, device->cap_mask)) in dmaengine_get()
946 list_for_each_entry(chan, &device->channels, device_node) { in dmaengine_get()
948 if (err == -ENODEV) { in dmaengine_get()
950 list_del_rcu(&device->global_node); in dmaengine_get()
953 dev_dbg(chan->device->dev, in dmaengine_get()
970 * dmaengine_put - let DMA drivers be removed when ref_count == 0
978 dmaengine_ref_count--; in dmaengine_put()
982 if (dma_has_cap(DMA_PRIVATE, device->cap_mask)) in dmaengine_put()
984 list_for_each_entry(chan, &device->channels, device_node) in dmaengine_put()
998 if (!dma_has_cap(DMA_INTERRUPT, device->cap_mask)) in device_has_all_tx_types()
1003 if (!dma_has_cap(DMA_MEMCPY, device->cap_mask)) in device_has_all_tx_types()
1008 if (!dma_has_cap(DMA_XOR, device->cap_mask)) in device_has_all_tx_types()
1012 if (!dma_has_cap(DMA_XOR_VAL, device->cap_mask)) in device_has_all_tx_types()
1018 if (!dma_has_cap(DMA_PQ, device->cap_mask)) in device_has_all_tx_types()
1022 if (!dma_has_cap(DMA_PQ_VAL, device->cap_mask)) in device_has_all_tx_types()
1036 device->dev_id = rc; in get_dma_id()
1045 chan->local = alloc_percpu(typeof(*chan->local)); in __dma_async_device_channel_register()
1046 if (!chan->local) in __dma_async_device_channel_register()
1047 return -ENOMEM; in __dma_async_device_channel_register()
1048 chan->dev = kzalloc(sizeof(*chan->dev), GFP_KERNEL); in __dma_async_device_channel_register()
1049 if (!chan->dev) { in __dma_async_device_channel_register()
1050 rc = -ENOMEM; in __dma_async_device_channel_register()
1058 mutex_lock(&device->chan_mutex); in __dma_async_device_channel_register()
1059 chan->chan_id = ida_alloc(&device->chan_ida, GFP_KERNEL); in __dma_async_device_channel_register()
1060 mutex_unlock(&device->chan_mutex); in __dma_async_device_channel_register()
1061 if (chan->chan_id < 0) { in __dma_async_device_channel_register()
1063 __func__, chan->chan_id); in __dma_async_device_channel_register()
1064 rc = chan->chan_id; in __dma_async_device_channel_register()
1068 chan->dev->device.class = &dma_devclass; in __dma_async_device_channel_register()
1069 chan->dev->device.parent = device->dev; in __dma_async_device_channel_register()
1070 chan->dev->chan = chan; in __dma_async_device_channel_register()
1071 chan->dev->dev_id = device->dev_id; in __dma_async_device_channel_register()
1072 dev_set_name(&chan->dev->device, "dma%dchan%d", in __dma_async_device_channel_register()
1073 device->dev_id, chan->chan_id); in __dma_async_device_channel_register()
1074 rc = device_register(&chan->dev->device); in __dma_async_device_channel_register()
1077 chan->client_count = 0; in __dma_async_device_channel_register()
1078 device->chancnt++; in __dma_async_device_channel_register()
1083 mutex_lock(&device->chan_mutex); in __dma_async_device_channel_register()
1084 ida_free(&device->chan_ida, chan->chan_id); in __dma_async_device_channel_register()
1085 mutex_unlock(&device->chan_mutex); in __dma_async_device_channel_register()
1087 kfree(chan->dev); in __dma_async_device_channel_register()
1089 free_percpu(chan->local); in __dma_async_device_channel_register()
1090 chan->local = NULL; in __dma_async_device_channel_register()
1111 if (chan->local == NULL) in __dma_async_device_channel_unregister()
1114 WARN_ONCE(!device->device_release && chan->client_count, in __dma_async_device_channel_unregister()
1116 __func__, chan->client_count); in __dma_async_device_channel_unregister()
1118 device->chancnt--; in __dma_async_device_channel_unregister()
1119 chan->dev->chan = NULL; in __dma_async_device_channel_unregister()
1121 mutex_lock(&device->chan_mutex); in __dma_async_device_channel_unregister()
1122 ida_free(&device->chan_ida, chan->chan_id); in __dma_async_device_channel_unregister()
1123 mutex_unlock(&device->chan_mutex); in __dma_async_device_channel_unregister()
1124 device_unregister(&chan->dev->device); in __dma_async_device_channel_unregister()
1125 free_percpu(chan->local); in __dma_async_device_channel_unregister()
1137 * dma_async_device_register - registers DMA devices found
1150 return -ENODEV; in dma_async_device_register()
1153 if (!device->dev) { in dma_async_device_register()
1155 return -EIO; in dma_async_device_register()
1158 device->owner = device->dev->driver->owner; in dma_async_device_register()
1160 if (dma_has_cap(DMA_MEMCPY, device->cap_mask) && !device->device_prep_dma_memcpy) { in dma_async_device_register()
1161 dev_err(device->dev, in dma_async_device_register()
1164 return -EIO; in dma_async_device_register()
1167 if (dma_has_cap(DMA_XOR, device->cap_mask) && !device->device_prep_dma_xor) { in dma_async_device_register()
1168 dev_err(device->dev, in dma_async_device_register()
1171 return -EIO; in dma_async_device_register()
1174 if (dma_has_cap(DMA_XOR_VAL, device->cap_mask) && !device->device_prep_dma_xor_val) { in dma_async_device_register()
1175 dev_err(device->dev, in dma_async_device_register()
1178 return -EIO; in dma_async_device_register()
1181 if (dma_has_cap(DMA_PQ, device->cap_mask) && !device->device_prep_dma_pq) { in dma_async_device_register()
1182 dev_err(device->dev, in dma_async_device_register()
1185 return -EIO; in dma_async_device_register()
1188 if (dma_has_cap(DMA_PQ_VAL, device->cap_mask) && !device->device_prep_dma_pq_val) { in dma_async_device_register()
1189 dev_err(device->dev, in dma_async_device_register()
1192 return -EIO; in dma_async_device_register()
1195 if (dma_has_cap(DMA_MEMSET, device->cap_mask) && !device->device_prep_dma_memset) { in dma_async_device_register()
1196 dev_err(device->dev, in dma_async_device_register()
1199 return -EIO; in dma_async_device_register()
1202 if (dma_has_cap(DMA_INTERRUPT, device->cap_mask) && !device->device_prep_dma_interrupt) { in dma_async_device_register()
1203 dev_err(device->dev, in dma_async_device_register()
1206 return -EIO; in dma_async_device_register()
1209 if (dma_has_cap(DMA_CYCLIC, device->cap_mask) && !device->device_prep_dma_cyclic) { in dma_async_device_register()
1210 dev_err(device->dev, in dma_async_device_register()
1213 return -EIO; in dma_async_device_register()
1216 if (dma_has_cap(DMA_INTERLEAVE, device->cap_mask) && !device->device_prep_interleaved_dma) { in dma_async_device_register()
1217 dev_err(device->dev, in dma_async_device_register()
1220 return -EIO; in dma_async_device_register()
1224 if (!device->device_tx_status) { in dma_async_device_register()
1225 dev_err(device->dev, "Device tx_status is not defined\n"); in dma_async_device_register()
1226 return -EIO; in dma_async_device_register()
1230 if (!device->device_issue_pending) { in dma_async_device_register()
1231 dev_err(device->dev, "Device issue_pending is not defined\n"); in dma_async_device_register()
1232 return -EIO; in dma_async_device_register()
1235 if (!device->device_release) in dma_async_device_register()
1236 dev_dbg(device->dev, in dma_async_device_register()
1239 kref_init(&device->ref); in dma_async_device_register()
1245 dma_cap_set(DMA_ASYNC_TX, device->cap_mask); in dma_async_device_register()
1251 mutex_init(&device->chan_mutex); in dma_async_device_register()
1252 ida_init(&device->chan_ida); in dma_async_device_register()
1255 list_for_each_entry(chan, &device->channels, device_node) { in dma_async_device_register()
1263 if (dmaengine_ref_count && !dma_has_cap(DMA_PRIVATE, device->cap_mask)) in dma_async_device_register()
1264 list_for_each_entry(chan, &device->channels, device_node) { in dma_async_device_register()
1268 if (dma_chan_get(chan) == -ENODEV) { in dma_async_device_register()
1273 rc = -ENODEV; in dma_async_device_register()
1278 list_add_tail_rcu(&device->global_node, &dma_device_list); in dma_async_device_register()
1279 if (dma_has_cap(DMA_PRIVATE, device->cap_mask)) in dma_async_device_register()
1280 device->privatecnt++; /* Always private */ in dma_async_device_register()
1290 if (!device->chancnt) { in dma_async_device_register()
1291 ida_free(&dma_ida, device->dev_id); in dma_async_device_register()
1295 list_for_each_entry(chan, &device->channels, device_node) { in dma_async_device_register()
1296 if (chan->local == NULL) in dma_async_device_register()
1299 chan->dev->chan = NULL; in dma_async_device_register()
1301 device_unregister(&chan->dev->device); in dma_async_device_register()
1302 free_percpu(chan->local); in dma_async_device_register()
1309 * dma_async_device_unregister - unregister a DMA device
1312 * This routine is called by dma driver exit routines, dmaengine holds module
1321 list_for_each_entry_safe(chan, n, &device->channels, device_node) in dma_async_device_unregister()
1329 dma_cap_set(DMA_PRIVATE, device->cap_mask); in dma_async_device_unregister()
1331 ida_free(&dma_ida, device->dev_id); in dma_async_device_unregister()
1346 * dmaenginem_async_device_register - registers DMA devices found
1358 return -ENOMEM; in dmaenginem_async_device_register()
1363 devres_add(device->dev, p); in dmaenginem_async_device_register()
1379 #define __UNMAP_POOL(x) { .size = x, .name = "dmaengine-unmap-" __stringify(x) }
1413 struct device *dev = unmap->dev; in dmaengine_unmap()
1416 cnt = unmap->to_cnt; in dmaengine_unmap()
1418 dma_unmap_page(dev, unmap->addr[i], unmap->len, in dmaengine_unmap()
1420 cnt += unmap->from_cnt; in dmaengine_unmap()
1422 dma_unmap_page(dev, unmap->addr[i], unmap->len, in dmaengine_unmap()
1424 cnt += unmap->bidi_cnt; in dmaengine_unmap()
1426 if (unmap->addr[i] == 0) in dmaengine_unmap()
1428 dma_unmap_page(dev, unmap->addr[i], unmap->len, in dmaengine_unmap()
1431 cnt = unmap->map_cnt; in dmaengine_unmap()
1432 mempool_free(unmap, __get_unmap_pool(cnt)->pool); in dmaengine_unmap()
1438 kref_put(&unmap->kref, dmaengine_unmap); in dmaengine_unmap_put()
1449 mempool_destroy(p->pool); in dmaengine_destroy_unmap_pool()
1450 p->pool = NULL; in dmaengine_destroy_unmap_pool()
1451 kmem_cache_destroy(p->cache); in dmaengine_destroy_unmap_pool()
1452 p->cache = NULL; in dmaengine_destroy_unmap_pool()
1465 sizeof(dma_addr_t) * p->size; in dmaengine_init_unmap_pool()
1467 p->cache = kmem_cache_create(p->name, size, 0, in dmaengine_init_unmap_pool()
1469 if (!p->cache) in dmaengine_init_unmap_pool()
1471 p->pool = mempool_create_slab_pool(1, p->cache); in dmaengine_init_unmap_pool()
1472 if (!p->pool) in dmaengine_init_unmap_pool()
1480 return -ENOMEM; in dmaengine_init_unmap_pool()
1488 unmap = mempool_alloc(__get_unmap_pool(nr)->pool, flags); in dmaengine_get_unmap_data()
1493 kref_init(&unmap->kref); in dmaengine_get_unmap_data()
1494 unmap->dev = dev; in dmaengine_get_unmap_data()
1495 unmap->map_cnt = nr; in dmaengine_get_unmap_data()
1504 tx->chan = chan; in dma_async_tx_descriptor_init()
1506 spin_lock_init(&tx->lock); in dma_async_tx_descriptor_init()
1515 if (!desc->desc_metadata_mode) { in desc_check_and_set_metadata_mode()
1516 if (dmaengine_is_metadata_mode_supported(desc->chan, mode)) in desc_check_and_set_metadata_mode()
1517 desc->desc_metadata_mode = mode; in desc_check_and_set_metadata_mode()
1519 return -ENOTSUPP; in desc_check_and_set_metadata_mode()
1520 } else if (desc->desc_metadata_mode != mode) { in desc_check_and_set_metadata_mode()
1521 return -EINVAL; in desc_check_and_set_metadata_mode()
1533 return -EINVAL; in dmaengine_desc_attach_metadata()
1539 if (!desc->metadata_ops || !desc->metadata_ops->attach) in dmaengine_desc_attach_metadata()
1540 return -ENOTSUPP; in dmaengine_desc_attach_metadata()
1542 return desc->metadata_ops->attach(desc, data, len); in dmaengine_desc_attach_metadata()
1552 return ERR_PTR(-EINVAL); in dmaengine_desc_get_metadata_ptr()
1558 if (!desc->metadata_ops || !desc->metadata_ops->get_ptr) in dmaengine_desc_get_metadata_ptr()
1559 return ERR_PTR(-ENOTSUPP); in dmaengine_desc_get_metadata_ptr()
1561 return desc->metadata_ops->get_ptr(desc, payload_len, max_len); in dmaengine_desc_get_metadata_ptr()
1571 return -EINVAL; in dmaengine_desc_set_metadata_len()
1577 if (!desc->metadata_ops || !desc->metadata_ops->set_len) in dmaengine_desc_set_metadata_len()
1578 return -ENOTSUPP; in dmaengine_desc_set_metadata_len()
1580 return desc->metadata_ops->set_len(desc, payload_len); in dmaengine_desc_set_metadata_len()
1585 * dma_wait_for_async_tx - spin wait for a transaction to complete
1586 * @tx: in-flight transaction to wait on
1596 while (tx->cookie == -EBUSY) { in dma_wait_for_async_tx()
1598 dev_err(tx->chan->device->dev, in dma_wait_for_async_tx()
1605 return dma_sync_wait(tx->chan, tx->cookie); in dma_wait_for_async_tx()
1610 * dma_run_dependencies - process dependent operations on the target channel
1613 * Helper routine for DMA drivers to process (start) dependent operations
1625 /* we'll submit tx->next now, so clear the link */ in dma_run_dependencies()
1627 chan = dep->chan; in dma_run_dependencies()
1637 if (dep_next && dep_next->chan == chan) in dma_run_dependencies()
1638 txd_clear_next(dep); /* ->next will be submitted */ in dma_run_dependencies()
1643 dep->tx_submit(dep); in dma_run_dependencies()
1646 chan->device->device_issue_pending(chan); in dma_run_dependencies()