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lightnvm: refactor and change vendor id for qemu

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The QEMU NVMe implementation uses Intel vendor, Intel device id, and the
first vendor specific byte to identify a LightNVM compatible nvme
instance.

Instead of using the Intel specific, use a preallocated from CNEX Labs
instead. This lets us uniquely identify a QEMU lightnvm device without
breaking other vendor specific work in the qemu device driver.

Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2015-11-28 16:49:26 +01:00 committed by Jens Axboe
parent d160147b5c
commit 09f2e71609
1 changed files with 9 additions and 2 deletions
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11
drivers/nvme/host/lightnvm.c
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@ -569,18 +569,25 @@ void nvme_nvm_unregister(struct request_queue *q, char *disk_name)
nvm_unregister(disk_name);
}
/* move to shared place when used in multiple places. */
#define PCI_VENDOR_ID_CNEX 0x1d1d
#define PCI_DEVICE_ID_CNEX_WL 0x2807
#define PCI_DEVICE_ID_CNEX_QEMU 0x1f1f
int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id)
{
struct nvme_dev *dev = ns->dev;
struct pci_dev *pdev = to_pci_dev(dev->dev);
/* QEMU NVMe simulator - PCI ID + Vendor specific bit */
if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x5845 &&
if (pdev->vendor == PCI_VENDOR_ID_CNEX &&
pdev->device == PCI_DEVICE_ID_CNEX_QEMU &&
id->vs[0] == 0x1)
return 1;
/* CNEX Labs - PCI ID + Vendor specific bit */
if (pdev->vendor == 0x1d1d && pdev->device == 0x2807 &&
if (pdev->vendor == PCI_VENDOR_ID_CNEX &&
pdev->device == PCI_DEVICE_ID_CNEX_WL &&
id->vs[0] == 0x1)
return 1;