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authorMatthew Wilcox <matthew.r.wilcox@intel.com>2011-05-20 13:03:42 -0400
committerMatthew Wilcox <matthew.r.wilcox@intel.com>2011-11-04 15:53:03 -0400
commit6bbf1acddeed0bfb345a5578f9fcada16f1e514f (patch)
tree965663c2a38ff10bc88fb2096fc0adbef500b11d /drivers/block
parenteac623ba7a91474a688eb5d0fcd0eaa6a56dc41c (diff)
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NVMe: Rework ioctls
Remove the special-purpose IDENTIFY, GET_RANGE_TYPE, DOWNLOAD_FIRMWARE and ACTIVATE_FIRMWARE commands. Replace them with a generic ADMIN_CMD ioctl that can submit any admin command. Add a new ID ioctl that returns the namespace ID of the queried device. It corresponds to the SCSI Idlun ioctl. Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/nvme.c128
1 files changed, 40 insertions, 88 deletions
diff --git a/drivers/block/nvme.c b/drivers/block/nvme.c
index f5e51a6..9e3c724 100644
--- a/drivers/block/nvme.c
+++ b/drivers/block/nvme.c
@@ -1033,51 +1033,6 @@ static void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
put_page(sg_page(&sg[i]));
}
-static int nvme_submit_user_admin_command(struct nvme_dev *dev,
- unsigned long addr, unsigned length,
- struct nvme_command *cmd)
-{
- int err, nents, tmplen = length;
- struct scatterlist *sg;
- struct nvme_prps *prps;
-
- nents = nvme_map_user_pages(dev, 0, addr, length, &sg);
- if (nents < 0)
- return nents;
- prps = nvme_setup_prps(dev, &cmd->common, sg, &tmplen, GFP_KERNEL);
- if (tmplen != length)
- err = -ENOMEM;
- else
- err = nvme_submit_admin_cmd(dev, cmd, NULL);
- nvme_unmap_user_pages(dev, 0, addr, length, sg, nents);
- nvme_free_prps(dev, prps);
- return err ? -EIO : 0;
-}
-
-static int nvme_identify(struct nvme_ns *ns, unsigned long addr, int cns)
-{
- struct nvme_command c;
-
- memset(&c, 0, sizeof(c));
- c.identify.opcode = nvme_admin_identify;
- c.identify.nsid = cns ? 0 : cpu_to_le32(ns->ns_id);
- c.identify.cns = cpu_to_le32(cns);
-
- return nvme_submit_user_admin_command(ns->dev, addr, 4096, &c);
-}
-
-static int nvme_get_range_type(struct nvme_ns *ns, unsigned long addr)
-{
- struct nvme_command c;
-
- memset(&c, 0, sizeof(c));
- c.features.opcode = nvme_admin_get_features;
- c.features.nsid = cpu_to_le32(ns->ns_id);
- c.features.fid = cpu_to_le32(NVME_FEAT_LBA_RANGE);
-
- return nvme_submit_user_admin_command(ns->dev, addr, 4096, &c);
-}
-
static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
{
struct nvme_dev *dev = ns->dev;
@@ -1096,10 +1051,11 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
switch (io.opcode) {
case nvme_cmd_write:
case nvme_cmd_read:
+ case nvme_cmd_compare:
nents = nvme_map_user_pages(dev, io.opcode & 1, io.addr,
length, &sg);
default:
- return -EFAULT;
+ return -EINVAL;
}
if (nents < 0)
@@ -1137,70 +1093,66 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
return status;
}
-static int nvme_download_firmware(struct nvme_ns *ns,
- struct nvme_dlfw __user *udlfw)
+static int nvme_user_admin_cmd(struct nvme_ns *ns,
+ struct nvme_admin_cmd __user *ucmd)
{
struct nvme_dev *dev = ns->dev;
- struct nvme_dlfw dlfw;
+ struct nvme_admin_cmd cmd;
struct nvme_command c;
- int nents, status, length;
+ int status, length, nents = 0;
struct scatterlist *sg;
- struct nvme_prps *prps;
+ struct nvme_prps *prps = NULL;
- if (copy_from_user(&dlfw, udlfw, sizeof(dlfw)))
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (copy_from_user(&cmd, ucmd, sizeof(cmd)))
return -EFAULT;
- if (dlfw.length >= (1 << 30))
- return -EINVAL;
- length = dlfw.length * 4;
-
- nents = nvme_map_user_pages(dev, 1, dlfw.addr, length, &sg);
- if (nents < 0)
- return nents;
memset(&c, 0, sizeof(c));
- c.dlfw.opcode = nvme_admin_download_fw;
- c.dlfw.numd = cpu_to_le32(dlfw.length);
- c.dlfw.offset = cpu_to_le32(dlfw.offset);
- prps = nvme_setup_prps(dev, &c.common, sg, &length, GFP_KERNEL);
- if (length != dlfw.length * 4)
+ c.common.opcode = cmd.opcode;
+ c.common.flags = cmd.flags;
+ c.common.nsid = cpu_to_le32(cmd.nsid);
+ c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
+ c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
+ c.common.cdw10[0] = cpu_to_le32(cmd.cdw10);
+ c.common.cdw10[1] = cpu_to_le32(cmd.cdw11);
+ c.common.cdw10[2] = cpu_to_le32(cmd.cdw12);
+ c.common.cdw10[3] = cpu_to_le32(cmd.cdw13);
+ c.common.cdw10[4] = cpu_to_le32(cmd.cdw14);
+ c.common.cdw10[5] = cpu_to_le32(cmd.cdw15);
+
+ length = cmd.data_len;
+ if (cmd.data_len) {
+ nents = nvme_map_user_pages(dev, 1, cmd.addr, length, &sg);
+ if (nents < 0)
+ return nents;
+ prps = nvme_setup_prps(dev, &c.common, sg, &length, GFP_KERNEL);
+ }
+
+ if (length != cmd.data_len)
status = -ENOMEM;
else
status = nvme_submit_admin_cmd(dev, &c, NULL);
- nvme_unmap_user_pages(dev, 0, dlfw.addr, dlfw.length * 4, sg, nents);
- nvme_free_prps(dev, prps);
+ if (cmd.data_len) {
+ nvme_unmap_user_pages(dev, 0, cmd.addr, cmd.data_len, sg,
+ nents);
+ nvme_free_prps(dev, prps);
+ }
return status;
}
-static int nvme_activate_firmware(struct nvme_ns *ns, unsigned long arg)
-{
- struct nvme_dev *dev = ns->dev;
- struct nvme_command c;
-
- memset(&c, 0, sizeof(c));
- c.common.opcode = nvme_admin_activate_fw;
- c.common.rsvd10[0] = cpu_to_le32(arg);
-
- return nvme_submit_admin_cmd(dev, &c, NULL);
-}
-
static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
unsigned long arg)
{
struct nvme_ns *ns = bdev->bd_disk->private_data;
switch (cmd) {
- case NVME_IOCTL_IDENTIFY_NS:
- return nvme_identify(ns, arg, 0);
- case NVME_IOCTL_IDENTIFY_CTRL:
- return nvme_identify(ns, arg, 1);
- case NVME_IOCTL_GET_RANGE_TYPE:
- return nvme_get_range_type(ns, arg);
+ case NVME_IOCTL_ID:
+ return ns->ns_id;
+ case NVME_IOCTL_ADMIN_CMD:
+ return nvme_user_admin_cmd(ns, (void __user *)arg);
case NVME_IOCTL_SUBMIT_IO:
return nvme_submit_io(ns, (void __user *)arg);
- case NVME_IOCTL_DOWNLOAD_FW:
- return nvme_download_firmware(ns, (void __user *)arg);
- case NVME_IOCTL_ACTIVATE_FW:
- return nvme_activate_firmware(ns, arg);
default:
return -ENOTTY;
}
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