mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-29 04:45:05 +00:00
nvme: split command submission helpers out of pci.c
Create a new core.c and start by adding the command submission helpers to it, which are already abstracted away from the actual hardware queues by the block layer. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
Jens Axboe
parent
71bd150c71
commit
21d34711e1
@ -1,4 +1,4 @@
|
||||
|
||||
obj-$(CONFIG_BLK_DEV_NVME) += nvme.o
|
||||
|
||||
nvme-y += pci.o scsi.o lightnvm.o
|
||||
nvme-y += core.o pci.o scsi.o lightnvm.o
|
||||
|
||||
173
drivers/nvme/host/core.c
Normal file
173
drivers/nvme/host/core.c
Normal file
@ -0,0 +1,173 @@
|
||||
/*
|
||||
* NVM Express device driver
|
||||
* Copyright (c) 2011-2014, Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*/
|
||||
|
||||
#include <linux/blkdev.h>
|
||||
#include <linux/blk-mq.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
#include "nvme.h"
|
||||
|
||||
/*
|
||||
* 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
|
||||
*/
|
||||
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
|
||||
void *buffer, void __user *ubuffer, unsigned bufflen,
|
||||
u32 *result, unsigned timeout)
|
||||
{
|
||||
bool write = cmd->common.opcode & 1;
|
||||
struct bio *bio = NULL;
|
||||
struct request *req;
|
||||
int ret;
|
||||
|
||||
req = blk_mq_alloc_request(q, write, 0);
|
||||
if (IS_ERR(req))
|
||||
return PTR_ERR(req);
|
||||
|
||||
req->cmd_type = REQ_TYPE_DRV_PRIV;
|
||||
req->cmd_flags |= REQ_FAILFAST_DRIVER;
|
||||
req->__data_len = 0;
|
||||
req->__sector = (sector_t) -1;
|
||||
req->bio = req->biotail = NULL;
|
||||
|
||||
req->timeout = timeout ? timeout : ADMIN_TIMEOUT;
|
||||
|
||||
req->cmd = (unsigned char *)cmd;
|
||||
req->cmd_len = sizeof(struct nvme_command);
|
||||
req->special = (void *)0;
|
||||
|
||||
if (buffer && bufflen) {
|
||||
ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL);
|
||||
if (ret)
|
||||
goto out;
|
||||
} else if (ubuffer && bufflen) {
|
||||
ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen,
|
||||
GFP_KERNEL);
|
||||
if (ret)
|
||||
goto out;
|
||||
bio = req->bio;
|
||||
}
|
||||
|
||||
blk_execute_rq(req->q, NULL, req, 0);
|
||||
if (bio)
|
||||
blk_rq_unmap_user(bio);
|
||||
if (result)
|
||||
*result = (u32)(uintptr_t)req->special;
|
||||
ret = req->errors;
|
||||
out:
|
||||
blk_mq_free_request(req);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
|
||||
void *buffer, unsigned bufflen)
|
||||
{
|
||||
return __nvme_submit_sync_cmd(q, cmd, buffer, NULL, bufflen, NULL, 0);
|
||||
}
|
||||
|
||||
int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id)
|
||||
{
|
||||
struct nvme_command c = { };
|
||||
int error;
|
||||
|
||||
/* gcc-4.4.4 (at least) has issues with initializers and anon unions */
|
||||
c.identify.opcode = nvme_admin_identify;
|
||||
c.identify.cns = cpu_to_le32(1);
|
||||
|
||||
*id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL);
|
||||
if (!*id)
|
||||
return -ENOMEM;
|
||||
|
||||
error = nvme_submit_sync_cmd(dev->admin_q, &c, *id,
|
||||
sizeof(struct nvme_id_ctrl));
|
||||
if (error)
|
||||
kfree(*id);
|
||||
return error;
|
||||
}
|
||||
|
||||
int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid,
|
||||
struct nvme_id_ns **id)
|
||||
{
|
||||
struct nvme_command c = { };
|
||||
int error;
|
||||
|
||||
/* gcc-4.4.4 (at least) has issues with initializers and anon unions */
|
||||
c.identify.opcode = nvme_admin_identify,
|
||||
c.identify.nsid = cpu_to_le32(nsid),
|
||||
|
||||
*id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL);
|
||||
if (!*id)
|
||||
return -ENOMEM;
|
||||
|
||||
error = nvme_submit_sync_cmd(dev->admin_q, &c, *id,
|
||||
sizeof(struct nvme_id_ns));
|
||||
if (error)
|
||||
kfree(*id);
|
||||
return error;
|
||||
}
|
||||
|
||||
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
|
||||
dma_addr_t dma_addr, u32 *result)
|
||||
{
|
||||
struct nvme_command c;
|
||||
|
||||
memset(&c, 0, sizeof(c));
|
||||
c.features.opcode = nvme_admin_get_features;
|
||||
c.features.nsid = cpu_to_le32(nsid);
|
||||
c.features.prp1 = cpu_to_le64(dma_addr);
|
||||
c.features.fid = cpu_to_le32(fid);
|
||||
|
||||
return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0,
|
||||
result, 0);
|
||||
}
|
||||
|
||||
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
|
||||
dma_addr_t dma_addr, u32 *result)
|
||||
{
|
||||
struct nvme_command c;
|
||||
|
||||
memset(&c, 0, sizeof(c));
|
||||
c.features.opcode = nvme_admin_set_features;
|
||||
c.features.prp1 = cpu_to_le64(dma_addr);
|
||||
c.features.fid = cpu_to_le32(fid);
|
||||
c.features.dword11 = cpu_to_le32(dword11);
|
||||
|
||||
return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0,
|
||||
result, 0);
|
||||
}
|
||||
|
||||
int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log)
|
||||
{
|
||||
struct nvme_command c = { };
|
||||
int error;
|
||||
|
||||
c.common.opcode = nvme_admin_get_log_page,
|
||||
c.common.nsid = cpu_to_le32(0xFFFFFFFF),
|
||||
c.common.cdw10[0] = cpu_to_le32(
|
||||
(((sizeof(struct nvme_smart_log) / 4) - 1) << 16) |
|
||||
NVME_LOG_SMART),
|
||||
|
||||
*log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL);
|
||||
if (!*log)
|
||||
return -ENOMEM;
|
||||
|
||||
error = nvme_submit_sync_cmd(dev->admin_q, &c, *log,
|
||||
sizeof(struct nvme_smart_log));
|
||||
if (error)
|
||||
kfree(*log);
|
||||
return error;
|
||||
}
|
||||
@ -22,6 +22,9 @@
|
||||
extern unsigned char nvme_io_timeout;
|
||||
#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
|
||||
|
||||
extern unsigned char admin_timeout;
|
||||
#define ADMIN_TIMEOUT (admin_timeout * HZ)
|
||||
|
||||
enum {
|
||||
NVME_NS_LBA = 0,
|
||||
NVME_NS_LIGHTNVM = 1,
|
||||
|
||||
@ -52,10 +52,9 @@
|
||||
#define NVME_AQ_DEPTH 256
|
||||
#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command))
|
||||
#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion))
|
||||
#define ADMIN_TIMEOUT (admin_timeout * HZ)
|
||||
#define SHUTDOWN_TIMEOUT (shutdown_timeout * HZ)
|
||||
|
||||
static unsigned char admin_timeout = 60;
|
||||
unsigned char admin_timeout = 60;
|
||||
module_param(admin_timeout, byte, 0644);
|
||||
MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands");
|
||||
|
||||
@ -1045,65 +1044,6 @@ static int nvme_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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
|
||||
*/
|
||||
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
|
||||
void *buffer, void __user *ubuffer, unsigned bufflen,
|
||||
u32 *result, unsigned timeout)
|
||||
{
|
||||
bool write = cmd->common.opcode & 1;
|
||||
struct bio *bio = NULL;
|
||||
struct request *req;
|
||||
int ret;
|
||||
|
||||
req = blk_mq_alloc_request(q, write, 0);
|
||||
if (IS_ERR(req))
|
||||
return PTR_ERR(req);
|
||||
|
||||
req->cmd_type = REQ_TYPE_DRV_PRIV;
|
||||
req->cmd_flags |= REQ_FAILFAST_DRIVER;
|
||||
req->__data_len = 0;
|
||||
req->__sector = (sector_t) -1;
|
||||
req->bio = req->biotail = NULL;
|
||||
|
||||
req->timeout = timeout ? timeout : ADMIN_TIMEOUT;
|
||||
|
||||
req->cmd = (unsigned char *)cmd;
|
||||
req->cmd_len = sizeof(struct nvme_command);
|
||||
req->special = (void *)0;
|
||||
|
||||
if (buffer && bufflen) {
|
||||
ret = blk_rq_map_kern(q, req, buffer, bufflen,
|
||||
__GFP_DIRECT_RECLAIM);
|
||||
if (ret)
|
||||
goto out;
|
||||
} else if (ubuffer && bufflen) {
|
||||
ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen,
|
||||
__GFP_DIRECT_RECLAIM);
|
||||
if (ret)
|
||||
goto out;
|
||||
bio = req->bio;
|
||||
}
|
||||
|
||||
blk_execute_rq(req->q, NULL, req, 0);
|
||||
if (bio)
|
||||
blk_rq_unmap_user(bio);
|
||||
if (result)
|
||||
*result = (u32)(uintptr_t)req->special;
|
||||
ret = req->errors;
|
||||
out:
|
||||
blk_mq_free_request(req);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
|
||||
void *buffer, unsigned bufflen)
|
||||
{
|
||||
return __nvme_submit_sync_cmd(q, cmd, buffer, NULL, bufflen, NULL, 0);
|
||||
}
|
||||
|
||||
static int nvme_submit_async_admin_req(struct nvme_dev *dev)
|
||||
{
|
||||
struct nvme_queue *nvmeq = dev->queues[0];
|
||||
@ -1216,99 +1156,6 @@ static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid)
|
||||
return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid);
|
||||
}
|
||||
|
||||
int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id)
|
||||
{
|
||||
struct nvme_command c = { };
|
||||
int error;
|
||||
|
||||
/* gcc-4.4.4 (at least) has issues with initializers and anon unions */
|
||||
c.identify.opcode = nvme_admin_identify;
|
||||
c.identify.cns = cpu_to_le32(1);
|
||||
|
||||
*id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL);
|
||||
if (!*id)
|
||||
return -ENOMEM;
|
||||
|
||||
error = nvme_submit_sync_cmd(dev->admin_q, &c, *id,
|
||||
sizeof(struct nvme_id_ctrl));
|
||||
if (error)
|
||||
kfree(*id);
|
||||
return error;
|
||||
}
|
||||
|
||||
int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid,
|
||||
struct nvme_id_ns **id)
|
||||
{
|
||||
struct nvme_command c = { };
|
||||
int error;
|
||||
|
||||
/* gcc-4.4.4 (at least) has issues with initializers and anon unions */
|
||||
c.identify.opcode = nvme_admin_identify,
|
||||
c.identify.nsid = cpu_to_le32(nsid),
|
||||
|
||||
*id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL);
|
||||
if (!*id)
|
||||
return -ENOMEM;
|
||||
|
||||
error = nvme_submit_sync_cmd(dev->admin_q, &c, *id,
|
||||
sizeof(struct nvme_id_ns));
|
||||
if (error)
|
||||
kfree(*id);
|
||||
return error;
|
||||
}
|
||||
|
||||
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
|
||||
dma_addr_t dma_addr, u32 *result)
|
||||
{
|
||||
struct nvme_command c;
|
||||
|
||||
memset(&c, 0, sizeof(c));
|
||||
c.features.opcode = nvme_admin_get_features;
|
||||
c.features.nsid = cpu_to_le32(nsid);
|
||||
c.features.prp1 = cpu_to_le64(dma_addr);
|
||||
c.features.fid = cpu_to_le32(fid);
|
||||
|
||||
return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0,
|
||||
result, 0);
|
||||
}
|
||||
|
||||
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
|
||||
dma_addr_t dma_addr, u32 *result)
|
||||
{
|
||||
struct nvme_command c;
|
||||
|
||||
memset(&c, 0, sizeof(c));
|
||||
c.features.opcode = nvme_admin_set_features;
|
||||
c.features.prp1 = cpu_to_le64(dma_addr);
|
||||
c.features.fid = cpu_to_le32(fid);
|
||||
c.features.dword11 = cpu_to_le32(dword11);
|
||||
|
||||
return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0,
|
||||
result, 0);
|
||||
}
|
||||
|
||||
int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log)
|
||||
{
|
||||
struct nvme_command c = { };
|
||||
int error;
|
||||
|
||||
c.common.opcode = nvme_admin_get_log_page,
|
||||
c.common.nsid = cpu_to_le32(0xFFFFFFFF),
|
||||
c.common.cdw10[0] = cpu_to_le32(
|
||||
(((sizeof(struct nvme_smart_log) / 4) - 1) << 16) |
|
||||
NVME_LOG_SMART),
|
||||
|
||||
*log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL);
|
||||
if (!*log)
|
||||
return -ENOMEM;
|
||||
|
||||
error = nvme_submit_sync_cmd(dev->admin_q, &c, *log,
|
||||
sizeof(struct nvme_smart_log));
|
||||
if (error)
|
||||
kfree(*log);
|
||||
return error;
|
||||
}
|
||||
|
||||
/**
|
||||
* nvme_abort_req - Attempt aborting a request
|
||||
*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user