diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2017-06-28 05:27:57 +0300 |
|---|---|---|
| committer | Sagi Grimberg <sagi@grimberg.me> | 2017-07-02 14:59:03 +0300 |
| commit | d554b5e1ca64d23e4f839e6531490fee8479fbaf (patch) | |
| tree | 3f474d61db1e509b70a88eae6f4947aa8287af95 /drivers/nvme | |
| parent | a84ebb837b419787c2ece74efa566c998929cead (diff) | |
| download | linux-d554b5e1ca64d23e4f839e6531490fee8479fbaf.tar.xz | |
nvme: Quirks for PM1725 controllers
PM1725 controllers have a couple of quirks that need to be handled in
the driver:
- I/O queue depth must be limited to 64 entries on controllers that do
not report MQES.
- The host interface registers go offline briefly while resetting the
chip. Thus a delay is needed before checking whether the controller
is ready.
Note that the admin queue depth is also limited to 64 on older versions
of this board. Since our NVME_AQ_DEPTH is now 32 that is no longer an
issue.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/pci.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 32a98e2740ad..343263bcb49a 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1908,6 +1908,12 @@ static int nvme_pci_enable(struct nvme_dev *dev) dev_warn(dev->ctrl.device, "detected Apple NVMe controller, " "set queue depth=%u to work around controller resets\n", dev->q_depth); + } else if (pdev->vendor == PCI_VENDOR_ID_SAMSUNG && + (pdev->device == 0xa821 || pdev->device == 0xa822) && + NVME_CAP_MQES(cap) == 0) { + dev->q_depth = 64; + dev_err(dev->ctrl.device, "detected PM1725 NVMe controller, " + "set queue depth=%u\n", dev->q_depth); } /* @@ -2454,6 +2460,10 @@ static const struct pci_device_id nvme_id_table[] = { .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, { PCI_DEVICE(0x1c5f, 0x0540), /* Memblaze Pblaze4 adapter */ .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, + { PCI_DEVICE(0x144d, 0xa821), /* Samsung PM1725 */ + .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, + { PCI_DEVICE(0x144d, 0xa822), /* Samsung PM1725a */ + .driver_data = NVME_QUIRK_DELAY_BEFORE_CHK_RDY, }, { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2003) }, |