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nvme: add a local nvme.h header

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Add a new drivers/block/nvme.h which contains all the driver internal
interface.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2015-10-03 15:46:41 +02:00
committed by Jens Axboe
parent 2659e57b90
commit f11bb3e244
4 changed files with 136 additions and 116 deletions
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114
include/linux/nvme.h
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@@ -16,9 +16,6 @@
#define _LINUX_NVME_H
#include <uapi/linux/nvme.h>
#include <linux/pci.h>
#include <linux/kref.h>
#include <linux/blk-mq.h>
struct nvme_bar {
__u64 cap; /* Controller Capabilities */
@@ -76,115 +73,4 @@ enum {
NVME_CSTS_SHST_MASK = 3 << 2,
};
extern unsigned char nvme_io_timeout;
#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
/*
* Represents an NVM Express device. Each nvme_dev is a PCI function.
*/
struct nvme_dev {
struct list_head node;
struct nvme_queue **queues;
struct request_queue *admin_q;
struct blk_mq_tag_set tagset;
struct blk_mq_tag_set admin_tagset;
u32 __iomem *dbs;
struct device *dev;
struct dma_pool *prp_page_pool;
struct dma_pool *prp_small_pool;
int instance;
unsigned queue_count;
unsigned online_queues;
unsigned max_qid;
int q_depth;
u32 db_stride;
u32 ctrl_config;
struct msix_entry *entry;
struct nvme_bar __iomem *bar;
struct list_head namespaces;
struct kref kref;
struct device *device;
struct work_struct reset_work;
struct work_struct probe_work;
struct work_struct scan_work;
char name[12];
char serial[20];
char model[40];
char firmware_rev[8];
bool subsystem;
u32 max_hw_sectors;
u32 stripe_size;
u32 page_size;
void __iomem *cmb;
dma_addr_t cmb_dma_addr;
u64 cmb_size;
u32 cmbsz;
u16 oncs;
u16 abort_limit;
u8 event_limit;
u8 vwc;
};
/*
* An NVM Express namespace is equivalent to a SCSI LUN
*/
struct nvme_ns {
struct list_head list;
struct nvme_dev *dev;
struct request_queue *queue;
struct gendisk *disk;
struct kref kref;
unsigned ns_id;
int lba_shift;
u16 ms;
bool ext;
u8 pi_type;
u64 mode_select_num_blocks;
u32 mode_select_block_len;
};
/*
* The nvme_iod describes the data in an I/O, including the list of PRP
* entries. You can't see it in this data structure because C doesn't let
* me express that. Use nvme_alloc_iod to ensure there's enough space
* allocated to store the PRP list.
*/
struct nvme_iod {
unsigned long private; /* For the use of the submitter of the I/O */
int npages; /* In the PRP list. 0 means small pool in use */
int offset; /* Of PRP list */
int nents; /* Used in scatterlist */
int length; /* Of data, in bytes */
dma_addr_t first_dma;
struct scatterlist meta_sg[1]; /* metadata requires single contiguous buffer */
struct scatterlist sg[0];
};
static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
{
return (sector >> (ns->lba_shift - 9));
}
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buf, unsigned bufflen);
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buffer, void __user *ubuffer, unsigned bufflen,
u32 *result, unsigned timeout);
int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id);
int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid,
struct nvme_id_ns **id);
int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log);
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
dma_addr_t dma_addr, u32 *result);
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
dma_addr_t dma_addr, u32 *result);
struct sg_io_hdr;
int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr);
int nvme_sg_io32(struct nvme_ns *ns, unsigned long arg);
int nvme_sg_get_version_num(int __user *ip);
#endif /* _LINUX_NVME_H */