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NVMe: Change NVME_IOCTL_GET_RANGE_TYPE to return all the ranges 

Factor out most of nvme_identify() into a new nvme_submit_user_admin_command()
function.  Change nvme_get_range_type() to call it and change nvme_ioctl to
realise that it's getting back all 64 ranges.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Matthew Wilcox 2011-01-26 14:34:32 -05:00
parent b8deb62cf2
commit bd38c5557c
1 changed files with 19 additions and 30 deletions
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49
drivers/block/nvme.c
View File

@ -677,18 +677,17 @@ static int __devinit nvme_configure_admin_queue(struct nvme_dev *dev)
return result;
}
static int nvme_identify(struct nvme_ns *ns, unsigned long addr, int cns)
static int nvme_submit_user_admin_command(struct nvme_dev *dev, unsigned long addr,
unsigned length, struct nvme_command *cmd)
{
struct nvme_dev *dev = ns->dev;
int i, err, count, nents, offset;
struct nvme_command c;
struct scatterlist sg[2];
struct page *pages[2];
if (addr & 3)
return -EINVAL;
offset = offset_in_page(addr);
count = offset ? 2 : 1;
count = ((offset + length) > PAGE_SIZE) ? 2 : 1;
err = get_user_pages_fast(addr, count, 1, pages);
if (err < count) {
@ -704,13 +703,9 @@ static int nvme_identify(struct nvme_ns *ns, unsigned long addr, int cns)
if (!nents)
goto put_pages;
memset(&c, 0, sizeof(c));
c.identify.opcode = nvme_admin_identify;
c.identify.nsid = cns ? 0 : cpu_to_le32(ns->ns_id);
nvme_setup_prps(&c.common, sg, 4096);
c.identify.cns = cpu_to_le32(cns);
nvme_setup_prps(&cmd->common, sg, length);
err = nvme_submit_admin_cmd(dev, &c, NULL);
err = nvme_submit_admin_cmd(dev, cmd, NULL);
if (err)
err = -EIO;
@ -723,34 +718,28 @@ static int nvme_identify(struct nvme_ns *ns, unsigned long addr, int cns)
return err;
}
static int nvme_get_range_type(struct nvme_ns *ns, void __user *addr)
static int nvme_identify(struct nvme_ns *ns, unsigned long addr, int cns)
{
struct nvme_dev *dev = ns->dev;
int status;
struct nvme_command c;
void *page;
dma_addr_t dma_addr;
page = dma_alloc_coherent(&dev->pci_dev->dev, 4096, &dma_addr,
GFP_KERNEL);
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.prp1 = cpu_to_le64(dma_addr);
c.features.fid = cpu_to_le32(NVME_FEAT_LBA_RANGE);
status = nvme_submit_admin_cmd(dev, &c, NULL);
/* XXX: Assuming first range for now */
if (status)
status = -EIO;
else if (copy_to_user(addr, page, 64))
status = -EFAULT;
dma_free_coherent(&dev->pci_dev->dev, 4096, page, dma_addr);
return status;
return nvme_submit_user_admin_command(ns->dev, addr, 4096, &c);
}
static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
@ -764,7 +753,7 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
case NVME_IOCTL_IDENTIFY_CTRL:
return nvme_identify(ns, arg, 1);
case NVME_IOCTL_GET_RANGE_TYPE:
return nvme_get_range_type(ns, (void __user *)arg);
return nvme_get_range_type(ns, arg);
default:
return -ENOTTY;
}