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NVMe: Add nvme-scsi.c

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Translates SCSI commands in SG_IO ioctl to NVMe commands.
Uses the scsi-nvme translation spec from nvmexpress.org as reference.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Vishal Verma 2013-03-04 18:40:58 -07:00 committed by Matthew Wilcox
parent f8ebf8409a
commit 5d0f6131a7
4 changed files with 2997 additions and 18 deletions
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2
drivers/block/Makefile
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@ -42,5 +42,5 @@ obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX) += mtip32xx/
obj-$(CONFIG_BLK_DEV_RSXX) += rsxx/
nvme-y := nvme-core.o
nvme-y := nvme-core.o nvme-scsi.o
swim_mod-y := swim.o swim_asm.o

37
drivers/block/nvme-core.c
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@ -39,7 +39,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <scsi/sg.h>
#include <asm-generic/io-64-nonatomic-lo-hi.h>
#define NVME_Q_DEPTH 1024
@ -224,12 +224,12 @@ static void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid,
return ctx;
}
static struct nvme_queue *get_nvmeq(struct nvme_dev *dev)
struct nvme_queue *get_nvmeq(struct nvme_dev *dev)
{
return dev->queues[get_cpu() + 1];
}
static void put_nvmeq(struct nvme_queue *nvmeq)
void put_nvmeq(struct nvme_queue *nvmeq)
{
put_cpu();
}
@ -290,7 +290,7 @@ nvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp)
return iod;
}
static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod)
void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod)
{
const int last_prp = PAGE_SIZE / 8 - 1;
int i;
@ -339,9 +339,8 @@ static void bio_completion(struct nvme_dev *dev, void *ctx,
}
/* length is in bytes. gfp flags indicates whether we may sleep. */
static int nvme_setup_prps(struct nvme_dev *dev,
struct nvme_common_command *cmd, struct nvme_iod *iod,
int total_len, gfp_t gfp)
int nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd,
struct nvme_iod *iod, int total_len, gfp_t gfp)
{
struct dma_pool *pool;
int length = total_len;
@ -512,7 +511,7 @@ static int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns,
return 0;
}
static int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns)
int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns)
{
int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH,
special_completion, NVME_IO_TIMEOUT);
@ -715,8 +714,8 @@ static void sync_completion(struct nvme_dev *dev, void *ctx,
* Returns 0 on success. If the result is negative, it's a Linux error code;
* if the result is positive, it's an NVM Express status code
*/
static int nvme_submit_sync_cmd(struct nvme_queue *nvmeq,
struct nvme_command *cmd, u32 *result, unsigned timeout)
int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd,
u32 *result, unsigned timeout)
{
int cmdid;
struct sync_cmd_info cmdinfo;
@ -745,7 +744,7 @@ static int nvme_submit_sync_cmd(struct nvme_queue *nvmeq,
return cmdinfo.status;
}
static int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
u32 *result)
{
return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT);
@ -818,7 +817,7 @@ static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid)
return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid);
}
static int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns,
int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns,
dma_addr_t dma_addr)
{
struct nvme_command c;
@ -832,7 +831,7 @@ static int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns,
return nvme_submit_admin_cmd(dev, &c, NULL);
}
static int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
dma_addr_t dma_addr, u32 *result)
{
struct nvme_command c;
@ -846,8 +845,8 @@ static int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
return nvme_submit_admin_cmd(dev, &c, result);
}
static int nvme_set_features(struct nvme_dev *dev, unsigned fid,
unsigned dword11, 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 nvme_command c;
@ -1065,7 +1064,7 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
return result;
}
static struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
unsigned long addr, unsigned length)
{
int i, err, count, nents, offset;
@ -1121,7 +1120,7 @@ static struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
return ERR_PTR(err);
}
static void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
struct nvme_iod *iod)
{
int i;
@ -1257,6 +1256,10 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
return nvme_user_admin_cmd(ns->dev, (void __user *)arg);
case NVME_IOCTL_SUBMIT_IO:
return nvme_submit_io(ns, (void __user *)arg);
case SG_GET_VERSION_NUM:
return nvme_sg_get_version_num((void __user *)arg);
case SG_IO:
return nvme_sg_io(ns, (void __user *)arg);
default:
return -ENOTTY;
}

2941
drivers/block/nvme-scsi.c Normal file
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File diff suppressed because it is too large Load Diff

35
include/linux/nvme.h
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@ -546,6 +546,8 @@ struct nvme_ns {
int ns_id;
int lba_shift;
u64 mode_select_num_blocks;
u32 mode_select_block_len;
};
/*
@ -563,6 +565,39 @@ struct nvme_iod {
dma_addr_t first_dma;
struct scatterlist sg[0];
};
/**
* nvme_free_iod - frees an nvme_iod
* @dev: The device that the I/O was submitted to
* @iod: The memory to free
*/
void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod);
int nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd,
struct nvme_iod *iod, int total_len, gfp_t gfp);
struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
unsigned long addr, unsigned length);
void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
struct nvme_iod *iod);
struct nvme_queue *get_nvmeq(struct nvme_dev *dev);
void put_nvmeq(struct nvme_queue *nvmeq);
int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd,
u32 *result, unsigned timeout);
int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns);
int nvme_submit_admin_cmd(struct nvme_dev *, struct nvme_command *,
u32 *result);
int nvme_identify(struct nvme_dev *, unsigned nsid, unsigned cns,
dma_addr_t dma_addr);
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_get_version_num(int __user *ip);
#endif
#endif /* _LINUX_NVME_H */