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f11bb3e2 CH |
1 | /* |
2 | * Copyright (c) 2011-2014, Intel Corporation. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | */ | |
13 | ||
14 | #ifndef _NVME_H | |
15 | #define _NVME_H | |
16 | ||
17 | #include <linux/nvme.h> | |
18 | #include <linux/pci.h> | |
19 | #include <linux/kref.h> | |
20 | #include <linux/blk-mq.h> | |
21 | ||
22 | extern unsigned char nvme_io_timeout; | |
23 | #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ) | |
24 | ||
21d34711 CH |
25 | extern unsigned char admin_timeout; |
26 | #define ADMIN_TIMEOUT (admin_timeout * HZ) | |
27 | ||
ca064085 MB |
28 | enum { |
29 | NVME_NS_LBA = 0, | |
30 | NVME_NS_LIGHTNVM = 1, | |
31 | }; | |
32 | ||
1c63dc66 CH |
33 | struct nvme_ctrl { |
34 | const struct nvme_ctrl_ops *ops; | |
f11bb3e2 | 35 | struct request_queue *admin_q; |
f11bb3e2 | 36 | struct device *dev; |
f11bb3e2 | 37 | int instance; |
1c63dc66 | 38 | |
f11bb3e2 CH |
39 | char name[12]; |
40 | char serial[20]; | |
41 | char model[40]; | |
42 | char firmware_rev[8]; | |
f11bb3e2 CH |
43 | u16 oncs; |
44 | u16 abort_limit; | |
45 | u8 event_limit; | |
46 | u8 vwc; | |
47 | }; | |
48 | ||
49 | /* | |
50 | * An NVM Express namespace is equivalent to a SCSI LUN | |
51 | */ | |
52 | struct nvme_ns { | |
53 | struct list_head list; | |
54 | ||
1c63dc66 | 55 | struct nvme_ctrl *ctrl; |
f11bb3e2 CH |
56 | struct request_queue *queue; |
57 | struct gendisk *disk; | |
58 | struct kref kref; | |
59 | ||
60 | unsigned ns_id; | |
61 | int lba_shift; | |
62 | u16 ms; | |
63 | bool ext; | |
64 | u8 pi_type; | |
ca064085 | 65 | int type; |
f11bb3e2 CH |
66 | u64 mode_select_num_blocks; |
67 | u32 mode_select_block_len; | |
68 | }; | |
69 | ||
1c63dc66 CH |
70 | struct nvme_ctrl_ops { |
71 | int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val); | |
72 | }; | |
73 | ||
74 | static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl) | |
75 | { | |
76 | u32 val = 0; | |
77 | ||
78 | if (ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &val)) | |
79 | return false; | |
80 | return val & NVME_CSTS_RDY; | |
81 | } | |
82 | ||
f11bb3e2 CH |
83 | static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector) |
84 | { | |
85 | return (sector >> (ns->lba_shift - 9)); | |
86 | } | |
87 | ||
88 | int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, | |
89 | void *buf, unsigned bufflen); | |
90 | int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, | |
91 | void *buffer, void __user *ubuffer, unsigned bufflen, | |
92 | u32 *result, unsigned timeout); | |
1c63dc66 CH |
93 | int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id); |
94 | int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid, | |
f11bb3e2 | 95 | struct nvme_id_ns **id); |
1c63dc66 CH |
96 | int nvme_get_log_page(struct nvme_ctrl *dev, struct nvme_smart_log **log); |
97 | int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, | |
f11bb3e2 | 98 | dma_addr_t dma_addr, u32 *result); |
1c63dc66 | 99 | int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, |
f11bb3e2 CH |
100 | dma_addr_t dma_addr, u32 *result); |
101 | ||
102 | struct sg_io_hdr; | |
103 | ||
104 | int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr); | |
105 | int nvme_sg_io32(struct nvme_ns *ns, unsigned long arg); | |
106 | int nvme_sg_get_version_num(int __user *ip); | |
107 | ||
ca064085 MB |
108 | int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id); |
109 | int nvme_nvm_register(struct request_queue *q, char *disk_name); | |
110 | void nvme_nvm_unregister(struct request_queue *q, char *disk_name); | |
111 | ||
f11bb3e2 | 112 | #endif /* _NVME_H */ |