include/linux/blk-mq.h:61:18: error: field 'kobj' has incomplete type

From: kbuild test robot
Date: Sat Sep 10 2016 - 21:25:34 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 98ac9a608dc79ba8a20cee77fe959a6dfccdaa63
commit: aa71987472a974f4f6dc4be377720564079ef42e nvme: fabrics drivers don't need the nvme-pci driver
date: 3 weeks ago
config: x86_64-randconfig-b0-09110627 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
git checkout aa71987472a974f4f6dc4be377720564079ef42e
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

In file included from drivers/nvme/host/core.c:16:0:
>> include/linux/blk-mq.h:61:18: error: field 'kobj' has incomplete type
struct kobject kobj;
^~~~
>> include/linux/blk-mq.h:128:2: error: unknown type name 'softirq_done_fn'
softirq_done_fn *complete;
^~~~~~~~~~~~~~~
include/linux/blk-mq.h:181:33: warning: 'struct gendisk' declared inside parameter list will not be visible outside of this definition or declaration
int blk_mq_register_disk(struct gendisk *);
^~~~~~~
include/linux/blk-mq.h:182:36: warning: 'struct gendisk' declared inside parameter list will not be visible outside of this definition or declaration
void blk_mq_unregister_disk(struct gendisk *);
^~~~~~~
include/linux/blk-mq.h: In function 'blk_mq_rq_from_pdu':
>> include/linux/blk-mq.h:260:22: error: invalid application of 'sizeof' to incomplete type 'struct request'
return pdu - sizeof(struct request);
^~~~~~
include/linux/blk-mq.h: In function 'blk_mq_rq_to_pdu':
>> include/linux/blk-mq.h:264:2: error: invalid use of undefined type 'struct request'
return rq + 1;
^~~~~~
In file included from drivers/nvme/host/core.c:32:0:
drivers/nvme/host/nvme.h: In function 'nvme_map_len':
>> drivers/nvme/host/nvme.h:217:6: error: implicit declaration of function 'req_op' [-Werror=implicit-function-declaration]
if (req_op(rq) == REQ_OP_DISCARD)
^~~~~~
>> drivers/nvme/host/nvme.h:220:10: error: implicit declaration of function 'blk_rq_bytes' [-Werror=implicit-function-declaration]
return blk_rq_bytes(rq);
^~~~~~~~~~~~
drivers/nvme/host/nvme.h: In function 'nvme_cleanup_cmd':
>> drivers/nvme/host/nvme.h:226:12: error: dereferencing pointer to incomplete type 'struct request'
kfree(req->completion_data);
^~
drivers/nvme/host/nvme.h: In function 'nvme_req_needs_retry':
>> drivers/nvme/host/nvme.h:243:35: error: implicit declaration of function 'blk_noretry_request' [-Werror=implicit-function-declaration]
return !(status & NVME_SC_DNR || blk_noretry_request(req)) &&
^~~~~~~~~~~~~~~~~~~
drivers/nvme/host/core.c: In function 'nvme_cancel_request':
>> drivers/nvme/host/core.c:75:6: error: implicit declaration of function 'blk_queue_dying' [-Werror=implicit-function-declaration]
if (blk_queue_dying(req->q))
^~~~~~~~~~~~~~~
drivers/nvme/host/core.c: In function 'nvme_free_ns':
>> drivers/nvme/host/core.c:157:42: error: dereferencing pointer to incomplete type 'struct gendisk'
nvme_nvm_unregister(ns->queue, ns->disk->disk_name);
^~
>> drivers/nvme/host/core.c:163:2: error: implicit declaration of function 'put_disk' [-Werror=implicit-function-declaration]
put_disk(ns->disk);
^~~~~~~~
drivers/nvme/host/core.c: In function 'nvme_requeue_req':
>> drivers/nvme/host/core.c:203:7: error: implicit declaration of function 'blk_queue_stopped' [-Werror=implicit-function-declaration]
if (!blk_queue_stopped(req->q))
^~~~~~~~~~~~~~~~~
drivers/nvme/host/core.c: In function 'nvme_alloc_request':
>> drivers/nvme/host/core.c:223:18: error: 'REQ_TYPE_DRV_PRIV' undeclared (first use in this function)
req->cmd_type = REQ_TYPE_DRV_PRIV;
^~~~~~~~~~~~~~~~~
drivers/nvme/host/core.c:223:18: note: each undeclared identifier is reported only once for each function it appears in
In file included from include/linux/byteorder/little_endian.h:4:0,
from arch/x86/include/uapi/asm/byteorder.h:4,
from include/asm-generic/bitops/le.h:5,
from arch/x86/include/asm/bitops.h:504,
from include/linux/bitops.h:36,
from include/linux/kernel.h:10,
from include/linux/sched.h:17,
from include/linux/blkdev.h:4,
from drivers/nvme/host/core.c:15:
drivers/nvme/host/core.c: In function 'nvme_setup_discard':
>> drivers/nvme/host/core.c:254:46: error: implicit declaration of function 'blk_rq_pos' [-Werror=implicit-function-declaration]
range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req)));
^
include/uapi/linux/byteorder/little_endian.h:30:51: note: in definition of macro '__cpu_to_le64'
#define __cpu_to_le64(x) ((__force __le64)(__u64)(x))
^
drivers/nvme/host/core.c:254:16: note: in expansion of macro 'cpu_to_le64'
range->slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req)));
^~~~~~~~~~~
>> drivers/nvme/host/core.c:265:2: error: implicit declaration of function 'blk_add_request_payload' [-Werror=implicit-function-declaration]
blk_add_request_payload(req, page, offset, sizeof(*range));
^~~~~~~~~~~~~~~~~~~~~~~
drivers/nvme/host/core.c: In function 'nvme_setup_rw':
>> drivers/nvme/host/core.c:292:21: error: implicit declaration of function 'rq_data_dir' [-Werror=implicit-function-declaration]
cmnd->rw.opcode = (rq_data_dir(req) ? nvme_cmd_write : nvme_cmd_read);
^~~~~~~~~~~
>> drivers/nvme/host/core.c:311:8: error: implicit declaration of function 'blk_integrity_rq' [-Werror=implicit-function-declaration]
if (!blk_integrity_rq(req))
^~~~~~~~~~~~~~~~
drivers/nvme/host/core.c: In function 'nvme_setup_cmd':
drivers/nvme/host/core.c:324:23: error: 'REQ_TYPE_DRV_PRIV' undeclared (first use in this function)
if (req->cmd_type == REQ_TYPE_DRV_PRIV)
^~~~~~~~~~~~~~~~~
drivers/nvme/host/core.c: In function '__nvme_submit_sync_cmd':
>> drivers/nvme/host/core.c:356:9: error: implicit declaration of function 'blk_rq_map_kern' [-Werror=implicit-function-declaration]
ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL);
^~~~~~~~~~~~~~~
>> drivers/nvme/host/core.c:361:2: error: implicit declaration of function 'blk_execute_rq' [-Werror=implicit-function-declaration]
blk_execute_rq(req->q, NULL, req, at_head);
^~~~~~~~~~~~~~
drivers/nvme/host/core.c: In function '__nvme_submit_user_cmd':
>> drivers/nvme/host/core.c:384:24: error: dereferencing pointer to incomplete type 'struct request_queue'
struct nvme_ns *ns = q->queuedata;
^~
--
In file included from drivers/nvme/host/nvme.h:20:0,
from drivers/nvme/host/scsi.c:47:
>> include/linux/blk-mq.h:128:2: error: unknown type name 'softirq_done_fn'
softirq_done_fn *complete;
^~~~~~~~~~~~~~~
include/linux/blk-mq.h: In function 'blk_mq_rq_from_pdu':
>> include/linux/blk-mq.h:260:22: error: invalid application of 'sizeof' to incomplete type 'struct request'
return pdu - sizeof(struct request);
^~~~~~
include/linux/blk-mq.h: In function 'blk_mq_rq_to_pdu':
>> include/linux/blk-mq.h:264:2: error: invalid use of undefined type 'struct request'
return rq + 1;
^~~~~~
In file included from drivers/nvme/host/scsi.c:47:0:
drivers/nvme/host/nvme.h: In function 'nvme_map_len':
>> drivers/nvme/host/nvme.h:217:6: error: implicit declaration of function 'req_op' [-Werror=implicit-function-declaration]
if (req_op(rq) == REQ_OP_DISCARD)
^~~~~~
>> drivers/nvme/host/nvme.h:220:10: error: implicit declaration of function 'blk_rq_bytes' [-Werror=implicit-function-declaration]
return blk_rq_bytes(rq);
^~~~~~~~~~~~
drivers/nvme/host/nvme.h: In function 'nvme_cleanup_cmd':
>> drivers/nvme/host/nvme.h:226:12: error: dereferencing pointer to incomplete type 'struct request'
kfree(req->completion_data);
^~
drivers/nvme/host/nvme.h: In function 'nvme_req_needs_retry':
>> drivers/nvme/host/nvme.h:243:35: error: implicit declaration of function 'blk_noretry_request' [-Werror=implicit-function-declaration]
return !(status & NVME_SC_DNR || blk_noretry_request(req)) &&
^~~~~~~~~~~~~~~~~~~
In file included from include/linux/swab.h:4:0,
from include/uapi/linux/byteorder/little_endian.h:12,
from include/linux/byteorder/little_endian.h:4,
from arch/x86/include/uapi/asm/byteorder.h:4,
from include/asm-generic/bitops/le.h:5,
from arch/x86/include/asm/bitops.h:504,
from include/linux/bitops.h:36,
from include/linux/kernel.h:10,
from include/linux/list.h:8,
from include/linux/wait.h:6,
from include/linux/fs.h:5,
from include/linux/highmem.h:4,
from include/linux/bio.h:23,
from drivers/nvme/host/scsi.c:20:
drivers/nvme/host/scsi.c: In function 'nvme_trans_bdev_limits_page':
>> drivers/nvme/host/scsi.c:769:21: error: implicit declaration of function 'queue_max_hw_sectors' [-Werror=implicit-function-declaration]
nvme_block_nr(ns, queue_max_hw_sectors(ns->queue)));
^
include/uapi/linux/swab.h:113:54: note: in definition of macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
include/linux/byteorder/generic.h:93:21: note: in expansion of macro '__cpu_to_be32'
#define cpu_to_be32 __cpu_to_be32
^~~~~~~~~~~~~
drivers/nvme/host/scsi.c:768:23: note: in expansion of macro 'cpu_to_be32'
__be32 max_sectors = cpu_to_be32(
^~~~~~~~~~~
>> drivers/nvme/host/scsi.c:770:44: error: dereferencing pointer to incomplete type 'struct request_queue'
__be32 max_discard = cpu_to_be32(ns->queue->limits.max_discard_sectors);
^
include/uapi/linux/swab.h:113:54: note: in definition of macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
include/linux/byteorder/generic.h:93:21: note: in expansion of macro '__cpu_to_be32'
#define cpu_to_be32 __cpu_to_be32
^~~~~~~~~~~~~
drivers/nvme/host/scsi.c:770:23: note: in expansion of macro 'cpu_to_be32'
__be32 max_discard = cpu_to_be32(ns->queue->limits.max_discard_sectors);
^~~~~~~~~~~
drivers/nvme/host/scsi.c: In function 'nvme_trans_do_nvme_io':
>> drivers/nvme/host/scsi.c:1724:7: error: implicit declaration of function 'get_capacity' [-Werror=implicit-function-declaration]
if (get_capacity(ns->disk) - unit_num_blocks <
^~~~~~~~~~~~
drivers/nvme/host/scsi.c: In function 'nvme_scsi_translate':
>> drivers/nvme/host/scsi.c:2449:9: error: 'BLK_MAX_CDB' undeclared (first use in this function)
u8 cmd[BLK_MAX_CDB];
^~~~~~~~~~~
drivers/nvme/host/scsi.c:2449:9: note: each undeclared identifier is reported only once for each function it appears in
drivers/nvme/host/scsi.c:2449:5: warning: unused variable 'cmd' [-Wunused-variable]
u8 cmd[BLK_MAX_CDB];
^~~
drivers/nvme/host/scsi.c: In function 'nvme_sg_io':
drivers/nvme/host/scsi.c:2556:20: error: 'BLK_MAX_CDB' undeclared (first use in this function)
if (hdr.cmd_len > BLK_MAX_CDB)
^~~~~~~~~~~
cc1: some warnings being treated as errors
--
In file included from drivers/nvme/host/nvme.h:20:0,
from drivers/nvme/host/fabrics.c:21:
>> include/linux/blk-mq.h:128:2: error: unknown type name 'softirq_done_fn'
softirq_done_fn *complete;
^~~~~~~~~~~~~~~
include/linux/blk-mq.h: In function 'blk_mq_rq_from_pdu':
>> include/linux/blk-mq.h:260:22: error: invalid application of 'sizeof' to incomplete type 'struct request'
return pdu - sizeof(struct request);
^~~~~~
include/linux/blk-mq.h: In function 'blk_mq_rq_to_pdu':
>> include/linux/blk-mq.h:264:2: error: invalid use of undefined type 'struct request'
return rq + 1;
^~~~~~
In file included from drivers/nvme/host/fabrics.c:21:0:
drivers/nvme/host/nvme.h: In function 'nvme_map_len':
>> drivers/nvme/host/nvme.h:217:6: error: implicit declaration of function 'req_op' [-Werror=implicit-function-declaration]
if (req_op(rq) == REQ_OP_DISCARD)
^~~~~~
>> drivers/nvme/host/nvme.h:220:10: error: implicit declaration of function 'blk_rq_bytes' [-Werror=implicit-function-declaration]
return blk_rq_bytes(rq);
^~~~~~~~~~~~
drivers/nvme/host/nvme.h: In function 'nvme_cleanup_cmd':
>> drivers/nvme/host/nvme.h:226:12: error: dereferencing pointer to incomplete type 'struct request'
kfree(req->completion_data);
^~
drivers/nvme/host/nvme.h: In function 'nvme_req_needs_retry':
>> drivers/nvme/host/nvme.h:243:35: error: implicit declaration of function 'blk_noretry_request' [-Werror=implicit-function-declaration]
return !(status & NVME_SC_DNR || blk_noretry_request(req)) &&
^~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
--
In file included from drivers/nvme/host/rdma.c:21:0:
>> include/linux/blk-mq.h:128:2: error: unknown type name 'softirq_done_fn'
softirq_done_fn *complete;
^~~~~~~~~~~~~~~
include/linux/blk-mq.h:181:33: warning: 'struct gendisk' declared inside parameter list will not be visible outside of this definition or declaration
int blk_mq_register_disk(struct gendisk *);
^~~~~~~
include/linux/blk-mq.h:182:36: warning: 'struct gendisk' declared inside parameter list will not be visible outside of this definition or declaration
void blk_mq_unregister_disk(struct gendisk *);
^~~~~~~
include/linux/blk-mq.h: In function 'blk_mq_rq_from_pdu':
>> include/linux/blk-mq.h:260:22: error: invalid application of 'sizeof' to incomplete type 'struct request'
return pdu - sizeof(struct request);
^~~~~~
include/linux/blk-mq.h: In function 'blk_mq_rq_to_pdu':
>> include/linux/blk-mq.h:264:2: error: invalid use of undefined type 'struct request'
return rq + 1;
^~~~~~
In file included from drivers/nvme/host/rdma.c:34:0:
drivers/nvme/host/nvme.h: In function 'nvme_map_len':
>> drivers/nvme/host/nvme.h:217:6: error: implicit declaration of function 'req_op' [-Werror=implicit-function-declaration]
if (req_op(rq) == REQ_OP_DISCARD)
^~~~~~
>> drivers/nvme/host/nvme.h:220:10: error: implicit declaration of function 'blk_rq_bytes' [-Werror=implicit-function-declaration]
return blk_rq_bytes(rq);
^~~~~~~~~~~~
drivers/nvme/host/nvme.h: In function 'nvme_cleanup_cmd':
>> drivers/nvme/host/nvme.h:226:12: error: dereferencing pointer to incomplete type 'struct request'
kfree(req->completion_data);
^~
drivers/nvme/host/nvme.h: In function 'nvme_req_needs_retry':
>> drivers/nvme/host/nvme.h:243:35: error: implicit declaration of function 'blk_noretry_request' [-Werror=implicit-function-declaration]
return !(status & NVME_SC_DNR || blk_noretry_request(req)) &&
^~~~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c: In function 'nvme_rdma_destroy_admin_queue':
>> drivers/nvme/host/rdma.c:671:2: error: implicit declaration of function 'blk_cleanup_queue' [-Werror=implicit-function-declaration]
blk_cleanup_queue(ctrl->ctrl.admin_q);
^~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c: In function 'nvme_rdma_unmap_data':
>> drivers/nvme/host/rdma.c:864:16: error: implicit declaration of function 'rq_data_dir' [-Werror=implicit-function-declaration]
req->nents, rq_data_dir(rq) ==
^~~~~~~~~~~
drivers/nvme/host/rdma.c: In function 'nvme_rdma_map_data':
>> drivers/nvme/host/rdma.c:975:10: error: implicit declaration of function 'blk_rq_map_sg' [-Werror=implicit-function-declaration]
nents = blk_rq_map_sg(rq->q, rq, req->sg_table.sgl);
^~~~~~~~~~~~~
drivers/nvme/host/rdma.c: In function 'nvme_rdma_process_nvme_rsp':
>> drivers/nvme/host/rdma.c:1141:22: error: 'REQ_TYPE_DRV_PRIV' undeclared (first use in this function)
if (rq->cmd_type == REQ_TYPE_DRV_PRIV && rq->special)
^~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c:1141:22: note: each undeclared identifier is reported only once for each function it appears in
drivers/nvme/host/rdma.c: At top level:
>> drivers/nvme/host/rdma.c:1424:1: error: return type is an incomplete type
nvme_rdma_timeout(struct request *rq, bool reserved)
^~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c: In function 'nvme_rdma_timeout':
>> drivers/nvme/host/rdma.c:1434:9: error: 'BLK_EH_HANDLED' undeclared (first use in this function)
return BLK_EH_HANDLED;
^~~~~~~~~~~~~~
drivers/nvme/host/rdma.c:1434:9: warning: 'return' with a value, in function returning void
drivers/nvme/host/rdma.c:1424:1: note: declared here
nvme_rdma_timeout(struct request *rq, bool reserved)
^~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c: In function 'nvme_rdma_queue_rq':
>> drivers/nvme/host/rdma.c:1440:34: error: dereferencing pointer to incomplete type 'struct request_queue'
struct nvme_ns *ns = hctx->queue->queuedata;
^~
>> drivers/nvme/host/rdma.c:1476:22: error: 'REQ_TYPE_FS' undeclared (first use in this function)
if (rq->cmd_type == REQ_TYPE_FS && req_op(rq) == REQ_OP_FLUSH)
^~~~~~~~~~~
drivers/nvme/host/rdma.c: In function 'nvme_rdma_complete_rq':
drivers/nvme/host/rdma.c:1527:23: error: 'REQ_TYPE_DRV_PRIV' undeclared (first use in this function)
if (rq->cmd_type == REQ_TYPE_DRV_PRIV)
^~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c: At top level:
>> drivers/nvme/host/rdma.c:1538:14: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.complete = nvme_rdma_complete_rq,
^~~~~~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c:1538:14: note: (near initialization for 'nvme_rdma_mq_ops.complete')
drivers/nvme/host/rdma.c:1545:13: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.timeout = nvme_rdma_timeout,
^~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c:1545:13: note: (near initialization for 'nvme_rdma_mq_ops.timeout')
drivers/nvme/host/rdma.c:1550:14: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.complete = nvme_rdma_complete_rq,
^~~~~~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c:1550:14: note: (near initialization for 'nvme_rdma_admin_mq_ops.complete')
drivers/nvme/host/rdma.c:1556:13: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.timeout = nvme_rdma_timeout,
^~~~~~~~~~~~~~~~~
drivers/nvme/host/rdma.c:1556:13: note: (near initialization for 'nvme_rdma_admin_mq_ops.timeout')
cc1: some warnings being treated as errors

vim +/kobj +61 include/linux/blk-mq.h

320ae51f Jens Axboe 2013-10-24 55 unsigned int numa_node;
17ded320 Jens Axboe 2015-01-07 56 unsigned int queue_num;
320ae51f Jens Axboe 2013-10-24 57
0d2602ca Jens Axboe 2014-05-13 58 atomic_t nr_active;
0d2602ca Jens Axboe 2014-05-13 59
320ae51f Jens Axboe 2013-10-24 60 struct blk_mq_cpu_notifier cpu_notifier;
320ae51f Jens Axboe 2013-10-24 @61 struct kobject kobj;
05229bee Jens Axboe 2015-11-05 62
05229bee Jens Axboe 2015-11-05 63 unsigned long poll_invoked;
05229bee Jens Axboe 2015-11-05 64 unsigned long poll_success;
320ae51f Jens Axboe 2013-10-24 65 };
320ae51f Jens Axboe 2013-10-24 66
24d2f903 Christoph Hellwig 2014-04-15 67 struct blk_mq_tag_set {
320ae51f Jens Axboe 2013-10-24 68 struct blk_mq_ops *ops;
320ae51f Jens Axboe 2013-10-24 69 unsigned int nr_hw_queues;
e3a2b3f9 Jens Axboe 2014-05-20 70 unsigned int queue_depth; /* max hw supported */
320ae51f Jens Axboe 2013-10-24 71 unsigned int reserved_tags;
320ae51f Jens Axboe 2013-10-24 72 unsigned int cmd_size; /* per-request extra data */
320ae51f Jens Axboe 2013-10-24 73 int numa_node;
320ae51f Jens Axboe 2013-10-24 74 unsigned int timeout;
320ae51f Jens Axboe 2013-10-24 75 unsigned int flags; /* BLK_MQ_F_* */
24d2f903 Christoph Hellwig 2014-04-15 76 void *driver_data;
24d2f903 Christoph Hellwig 2014-04-15 77
24d2f903 Christoph Hellwig 2014-04-15 78 struct blk_mq_tags **tags;
0d2602ca Jens Axboe 2014-05-13 79
0d2602ca Jens Axboe 2014-05-13 80 struct mutex tag_list_lock;
0d2602ca Jens Axboe 2014-05-13 81 struct list_head tag_list;
320ae51f Jens Axboe 2013-10-24 82 };
320ae51f Jens Axboe 2013-10-24 83
74c45052 Jens Axboe 2014-10-29 84 struct blk_mq_queue_data {
74c45052 Jens Axboe 2014-10-29 85 struct request *rq;
74c45052 Jens Axboe 2014-10-29 86 struct list_head *list;
74c45052 Jens Axboe 2014-10-29 87 bool last;
74c45052 Jens Axboe 2014-10-29 88 };
74c45052 Jens Axboe 2014-10-29 89
74c45052 Jens Axboe 2014-10-29 90 typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, const struct blk_mq_queue_data *);
320ae51f Jens Axboe 2013-10-24 91 typedef struct blk_mq_hw_ctx *(map_queue_fn)(struct request_queue *, const int);
0152fb6b Christoph Hellwig 2014-09-13 92 typedef enum blk_eh_timer_return (timeout_fn)(struct request *, bool);
320ae51f Jens Axboe 2013-10-24 93 typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int);
320ae51f Jens Axboe 2013-10-24 94 typedef void (exit_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int);
24d2f903 Christoph Hellwig 2014-04-15 95 typedef int (init_request_fn)(void *, struct request *, unsigned int,
24d2f903 Christoph Hellwig 2014-04-15 96 unsigned int, unsigned int);
24d2f903 Christoph Hellwig 2014-04-15 97 typedef void (exit_request_fn)(void *, struct request *, unsigned int,
24d2f903 Christoph Hellwig 2014-04-15 98 unsigned int);
486cf989 Sagi Grimberg 2016-07-06 99 typedef int (reinit_request_fn)(void *, struct request *);
320ae51f Jens Axboe 2013-10-24 100
81481eb4 Christoph Hellwig 2014-09-13 101 typedef void (busy_iter_fn)(struct blk_mq_hw_ctx *, struct request *, void *,
81481eb4 Christoph Hellwig 2014-09-13 102 bool);
f26cdc85 Keith Busch 2015-06-01 103 typedef void (busy_tag_iter_fn)(struct request *, void *, bool);
05229bee Jens Axboe 2015-11-05 104 typedef int (poll_fn)(struct blk_mq_hw_ctx *, unsigned int);
05229bee Jens Axboe 2015-11-05 105
81481eb4 Christoph Hellwig 2014-09-13 106
320ae51f Jens Axboe 2013-10-24 107 struct blk_mq_ops {
320ae51f Jens Axboe 2013-10-24 108 /*
320ae51f Jens Axboe 2013-10-24 109 * Queue request
320ae51f Jens Axboe 2013-10-24 110 */
320ae51f Jens Axboe 2013-10-24 111 queue_rq_fn *queue_rq;
320ae51f Jens Axboe 2013-10-24 112
320ae51f Jens Axboe 2013-10-24 113 /*
320ae51f Jens Axboe 2013-10-24 114 * Map to specific hardware queue
320ae51f Jens Axboe 2013-10-24 115 */
320ae51f Jens Axboe 2013-10-24 116 map_queue_fn *map_queue;
320ae51f Jens Axboe 2013-10-24 117
320ae51f Jens Axboe 2013-10-24 118 /*
320ae51f Jens Axboe 2013-10-24 119 * Called on request timeout
320ae51f Jens Axboe 2013-10-24 120 */
0152fb6b Christoph Hellwig 2014-09-13 121 timeout_fn *timeout;
320ae51f Jens Axboe 2013-10-24 122
05229bee Jens Axboe 2015-11-05 123 /*
05229bee Jens Axboe 2015-11-05 124 * Called to poll for completion of a specific tag.
05229bee Jens Axboe 2015-11-05 125 */
05229bee Jens Axboe 2015-11-05 126 poll_fn *poll;
05229bee Jens Axboe 2015-11-05 127
30a91cb4 Christoph Hellwig 2014-02-10 @128 softirq_done_fn *complete;
30a91cb4 Christoph Hellwig 2014-02-10 129
320ae51f Jens Axboe 2013-10-24 130 /*
320ae51f Jens Axboe 2013-10-24 131 * Called when the block layer side of a hardware queue has been
320ae51f Jens Axboe 2013-10-24 132 * set up, allowing the driver to allocate/init matching structures.
320ae51f Jens Axboe 2013-10-24 133 * Ditto for exit/teardown.
320ae51f Jens Axboe 2013-10-24 134 */
320ae51f Jens Axboe 2013-10-24 135 init_hctx_fn *init_hctx;
320ae51f Jens Axboe 2013-10-24 136 exit_hctx_fn *exit_hctx;
e9b267d9 Christoph Hellwig 2014-04-15 137
e9b267d9 Christoph Hellwig 2014-04-15 138 /*
e9b267d9 Christoph Hellwig 2014-04-15 139 * Called for every command allocated by the block layer to allow
e9b267d9 Christoph Hellwig 2014-04-15 140 * the driver to set up driver specific data.
f70ced09 Ming Lei 2014-09-25 141 *
f70ced09 Ming Lei 2014-09-25 142 * Tag greater than or equal to queue_depth is for setting up
f70ced09 Ming Lei 2014-09-25 143 * flush request.
f70ced09 Ming Lei 2014-09-25 144 *
e9b267d9 Christoph Hellwig 2014-04-15 145 * Ditto for exit/teardown.
e9b267d9 Christoph Hellwig 2014-04-15 146 */
e9b267d9 Christoph Hellwig 2014-04-15 147 init_request_fn *init_request;
e9b267d9 Christoph Hellwig 2014-04-15 148 exit_request_fn *exit_request;
486cf989 Sagi Grimberg 2016-07-06 149 reinit_request_fn *reinit_request;
320ae51f Jens Axboe 2013-10-24 150 };
320ae51f Jens Axboe 2013-10-24 151
320ae51f Jens Axboe 2013-10-24 152 enum {
320ae51f Jens Axboe 2013-10-24 153 BLK_MQ_RQ_QUEUE_OK = 0, /* queued fine */
320ae51f Jens Axboe 2013-10-24 154 BLK_MQ_RQ_QUEUE_BUSY = 1, /* requeue IO for later */
320ae51f Jens Axboe 2013-10-24 155 BLK_MQ_RQ_QUEUE_ERROR = 2, /* end IO with error */
320ae51f Jens Axboe 2013-10-24 156
320ae51f Jens Axboe 2013-10-24 157 BLK_MQ_F_SHOULD_MERGE = 1 << 0,
8a58d1f1 Jens Axboe 2014-08-15 158 BLK_MQ_F_TAG_SHARED = 1 << 1,
8a58d1f1 Jens Axboe 2014-08-15 159 BLK_MQ_F_SG_MERGE = 1 << 2,
e167dfb5 Jens Axboe 2014-10-29 160 BLK_MQ_F_DEFER_ISSUE = 1 << 4,
24391c0d Shaohua Li 2015-01-23 161 BLK_MQ_F_ALLOC_POLICY_START_BIT = 8,
24391c0d Shaohua Li 2015-01-23 162 BLK_MQ_F_ALLOC_POLICY_BITS = 1,
320ae51f Jens Axboe 2013-10-24 163
5d12f905 Jens Axboe 2014-03-19 164 BLK_MQ_S_STOPPED = 0,
0d2602ca Jens Axboe 2014-05-13 165 BLK_MQ_S_TAG_ACTIVE = 1,
320ae51f Jens Axboe 2013-10-24 166
a4391c64 Jens Axboe 2014-06-05 167 BLK_MQ_MAX_DEPTH = 10240,
506e931f Jens Axboe 2014-05-07 168
506e931f Jens Axboe 2014-05-07 169 BLK_MQ_CPU_WORK_BATCH = 8,
320ae51f Jens Axboe 2013-10-24 170 };
24391c0d Shaohua Li 2015-01-23 171 #define BLK_MQ_FLAG_TO_ALLOC_POLICY(flags) \
24391c0d Shaohua Li 2015-01-23 172 ((flags >> BLK_MQ_F_ALLOC_POLICY_START_BIT) & \
24391c0d Shaohua Li 2015-01-23 173 ((1 << BLK_MQ_F_ALLOC_POLICY_BITS) - 1))
24391c0d Shaohua Li 2015-01-23 174 #define BLK_ALLOC_POLICY_TO_MQ_FLAG(policy) \
24391c0d Shaohua Li 2015-01-23 175 ((policy & ((1 << BLK_MQ_F_ALLOC_POLICY_BITS) - 1)) \
24391c0d Shaohua Li 2015-01-23 176 << BLK_MQ_F_ALLOC_POLICY_START_BIT)
320ae51f Jens Axboe 2013-10-24 177
24d2f903 Christoph Hellwig 2014-04-15 178 struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *);
b62c21b7 Mike Snitzer 2015-03-12 179 struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
b62c21b7 Mike Snitzer 2015-03-12 180 struct request_queue *q);
320ae51f Jens Axboe 2013-10-24 @181 int blk_mq_register_disk(struct gendisk *);
320ae51f Jens Axboe 2013-10-24 @182 void blk_mq_unregister_disk(struct gendisk *);
320ae51f Jens Axboe 2013-10-24 183
24d2f903 Christoph Hellwig 2014-04-15 184 int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set);
24d2f903 Christoph Hellwig 2014-04-15 185 void blk_mq_free_tag_set(struct blk_mq_tag_set *set);
24d2f903 Christoph Hellwig 2014-04-15 186
320ae51f Jens Axboe 2013-10-24 187 void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule);
320ae51f Jens Axboe 2013-10-24 188
feb71dae Christoph Hellwig 2014-02-20 189 void blk_mq_insert_request(struct request *, bool, bool, bool);
320ae51f Jens Axboe 2013-10-24 190 void blk_mq_free_request(struct request *rq);
7c7f2f2b Jens Axboe 2014-11-17 191 void blk_mq_free_hctx_request(struct blk_mq_hw_ctx *, struct request *rq);
320ae51f Jens Axboe 2013-10-24 192 bool blk_mq_can_queue(struct blk_mq_hw_ctx *);
6f3b0e8b Christoph Hellwig 2015-11-26 193
6f3b0e8b Christoph Hellwig 2015-11-26 194 enum {
6f3b0e8b Christoph Hellwig 2015-11-26 195 BLK_MQ_REQ_NOWAIT = (1 << 0), /* return when out of requests */
6f3b0e8b Christoph Hellwig 2015-11-26 196 BLK_MQ_REQ_RESERVED = (1 << 1), /* allocate from reserved pool */
6f3b0e8b Christoph Hellwig 2015-11-26 197 };
6f3b0e8b Christoph Hellwig 2015-11-26 198
4ce01dd1 Christoph Hellwig 2014-05-27 199 struct request *blk_mq_alloc_request(struct request_queue *q, int rw,
6f3b0e8b Christoph Hellwig 2015-11-26 200 unsigned int flags);
1f5bd336 Ming Lin 2016-06-13 201 struct request *blk_mq_alloc_request_hctx(struct request_queue *q, int op,
1f5bd336 Ming Lin 2016-06-13 202 unsigned int flags, unsigned int hctx_idx);
0e62f51f Jens Axboe 2014-06-04 203 struct request *blk_mq_tag_to_rq(struct blk_mq_tags *tags, unsigned int tag);
f26cdc85 Keith Busch 2015-06-01 204 struct cpumask *blk_mq_tags_cpumask(struct blk_mq_tags *tags);
320ae51f Jens Axboe 2013-10-24 205
205fb5f5 Bart Van Assche 2014-10-30 206 enum {
205fb5f5 Bart Van Assche 2014-10-30 207 BLK_MQ_UNIQUE_TAG_BITS = 16,
205fb5f5 Bart Van Assche 2014-10-30 208 BLK_MQ_UNIQUE_TAG_MASK = (1 << BLK_MQ_UNIQUE_TAG_BITS) - 1,
205fb5f5 Bart Van Assche 2014-10-30 209 };
205fb5f5 Bart Van Assche 2014-10-30 210
205fb5f5 Bart Van Assche 2014-10-30 211 u32 blk_mq_unique_tag(struct request *rq);
205fb5f5 Bart Van Assche 2014-10-30 212
205fb5f5 Bart Van Assche 2014-10-30 213 static inline u16 blk_mq_unique_tag_to_hwq(u32 unique_tag)
205fb5f5 Bart Van Assche 2014-10-30 214 {
205fb5f5 Bart Van Assche 2014-10-30 215 return unique_tag >> BLK_MQ_UNIQUE_TAG_BITS;
205fb5f5 Bart Van Assche 2014-10-30 216 }
205fb5f5 Bart Van Assche 2014-10-30 217
205fb5f5 Bart Van Assche 2014-10-30 218 static inline u16 blk_mq_unique_tag_to_tag(u32 unique_tag)
205fb5f5 Bart Van Assche 2014-10-30 219 {
205fb5f5 Bart Van Assche 2014-10-30 220 return unique_tag & BLK_MQ_UNIQUE_TAG_MASK;
205fb5f5 Bart Van Assche 2014-10-30 221 }
205fb5f5 Bart Van Assche 2014-10-30 222
320ae51f Jens Axboe 2013-10-24 223 struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_index);
f14bbe77 Jens Axboe 2014-05-27 224 struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *, unsigned int, int);
320ae51f Jens Axboe 2013-10-24 225
973c0191 Keith Busch 2015-01-07 226 int blk_mq_request_started(struct request *rq);
e2490073 Christoph Hellwig 2014-09-13 227 void blk_mq_start_request(struct request *rq);
c8a446ad Christoph Hellwig 2014-09-13 228 void blk_mq_end_request(struct request *rq, int error);
c8a446ad Christoph Hellwig 2014-09-13 229 void __blk_mq_end_request(struct request *rq, int error);
320ae51f Jens Axboe 2013-10-24 230
ed0791b2 Christoph Hellwig 2014-04-16 231 void blk_mq_requeue_request(struct request *rq);
6fca6a61 Christoph Hellwig 2014-05-28 232 void blk_mq_add_to_requeue_list(struct request *rq, bool at_head);
c68ed59f Keith Busch 2015-01-07 233 void blk_mq_cancel_requeue_work(struct request_queue *q);
6fca6a61 Christoph Hellwig 2014-05-28 234 void blk_mq_kick_requeue_list(struct request_queue *q);
1885b24d Jens Axboe 2015-01-07 235 void blk_mq_abort_requeue_list(struct request_queue *q);
f4829a9b Christoph Hellwig 2015-09-27 236 void blk_mq_complete_request(struct request *rq, int error);
30a91cb4 Christoph Hellwig 2014-02-10 237
320ae51f Jens Axboe 2013-10-24 238 void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx);
320ae51f Jens Axboe 2013-10-24 239 void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx);
280d45f6 Christoph Hellwig 2013-10-25 240 void blk_mq_stop_hw_queues(struct request_queue *q);
2f268556 Christoph Hellwig 2014-04-16 241 void blk_mq_start_hw_queues(struct request_queue *q);
1b4a3258 Christoph Hellwig 2014-04-16 242 void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async);
b94ec296 Mike Snitzer 2015-03-11 243 void blk_mq_run_hw_queues(struct request_queue *q, bool async);
70f4db63 Christoph Hellwig 2014-04-16 244 void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs);
e0489487 Sagi Grimberg 2016-03-10 245 void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset,
e0489487 Sagi Grimberg 2016-03-10 246 busy_tag_iter_fn *fn, void *priv);
c761d96b Jens Axboe 2015-01-02 247 void blk_mq_freeze_queue(struct request_queue *q);
b4c6a028 Keith Busch 2014-12-19 248 void blk_mq_unfreeze_queue(struct request_queue *q);
b4c6a028 Keith Busch 2014-12-19 249 void blk_mq_freeze_queue_start(struct request_queue *q);
486cf989 Sagi Grimberg 2016-07-06 250 int blk_mq_reinit_tagset(struct blk_mq_tag_set *set);
320ae51f Jens Axboe 2013-10-24 251
868f2f0b Keith Busch 2015-12-17 252 void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues);
868f2f0b Keith Busch 2015-12-17 253
320ae51f Jens Axboe 2013-10-24 254 /*
320ae51f Jens Axboe 2013-10-24 255 * Driver command data is immediately after the request. So subtract request
2963e3f7 Jens Axboe 2015-04-09 256 * size to get back to the original request, add request size to get the PDU.
320ae51f Jens Axboe 2013-10-24 257 */
320ae51f Jens Axboe 2013-10-24 258 static inline struct request *blk_mq_rq_from_pdu(void *pdu)
320ae51f Jens Axboe 2013-10-24 259 {
320ae51f Jens Axboe 2013-10-24 @260 return pdu - sizeof(struct request);
320ae51f Jens Axboe 2013-10-24 261 }
320ae51f Jens Axboe 2013-10-24 262 static inline void *blk_mq_rq_to_pdu(struct request *rq)
320ae51f Jens Axboe 2013-10-24 263 {

:::::: The code at line 61 was first introduced by commit
:::::: 320ae51feed5c2f13664aa05a76bec198967e04d blk-mq: new multi-queue block IO queueing mechanism

:::::: TO: Jens Axboe <axboe@xxxxxxxxx>
:::::: CC: Jens Axboe <axboe@xxxxxxxxx>

---
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