Capabilities register is RO and accessed at various places in the
driver. Let's cache it in the controller driver's priv struct.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
So far this is not causing any issue due to NVMe and x86 are using
the same endianness, but for correctness, it should be fixed.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
ndev->queues is a pointer to pointer, but the allocation wrongly
requests sizeof(struct nvme_queue). Fix it.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
The codes currently try to read PCI vendor id of the NVMe block
device by dm_pci_read_config16() with its parameter set as its
root complex controller (ndev->pdev) instead of itself. This is
seriously wrong. We can read the vendor id by passing the correct
udevice parameter to the dm_pci_read_config16() API, however there
is a shortcut by reading the cached vendor id from the PCI device's
struct pci_child_platdata.
While we are here fixing this bug, apparently the quirk stuff handle
codes in nvme_get_info_from_identify() never takes effect since its
logic has never been true at all. Remove these codes completely.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Maximum Data Transfer Size (MDTS) field indicates the maximum
data transfer size between the host and the controller. The
host should not submit a command that exceeds this transfer
size. The value is in units of the minimum memory page size
and is reported as a power of two (2^n).
The spec also says: a value of 0h indicates no restrictions
on transfer size. On the real NVMe card this is normally not
0 due to hardware restrictions, but with QEMU emulated NVMe
device it reports as 0. In nvme_blk_read/write() below we
have the following algorithm for maximum number of logic
blocks per transfer:
u16 lbas = 1 << (dev->max_transfer_shift - ns->lba_shift);
dev->max_transfer_shift being 0 will for sure cause lbas to
overflow. Let's use 20. With this fix, the NVMe driver works
on QEMU emulated NVMe device.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
NVMe should use the nsze value from the queried device. This will
reflect the total number of blocks of the device and fix detecting
my Samsung 960 EVO 256GB.
Original:
Capacity: 40386.6 MB = 39.4 GB (82711872 x 512)
Fixed:
Capacity: 238475.1 MB = 232.8 GB (488397168 x 512)
Signed-off-by: Jon Nettleton <jon@solid-run.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This adds support to detect the catchall PCI class for NVMe devices.
It allows the drivers to work with most NVMe devices that don't need
specific detection due to quirks etc.
Tested against a Samsung 960 EVO drive.
Signed-off-by: Jon Nettleton <jon@solid-run.com>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This adds nvme_print_info() to show detailed NVMe controller and
namespace information.
Signed-off-by: Zhikang Zhang <zhikang.zhang@nxp.com>
Signed-off-by: Wenbin Song <wenbin.song@nxp.com>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
NVM Express (NVMe) is a register level interface that allows host
software to communicate with a non-volatile memory subsystem. This
interface is optimized for enterprise and client solid state drives,
typically attached to the PCI express interface.
This adds a U-Boot driver support of devices that follow the NVMe
standard [1] and supports basic read/write operations.
Tested with a 400GB Intel SSD 750 series NVMe card with controller
id 8086:0953.
[1] http://www.nvmexpress.org/resources/specifications/
Signed-off-by: Zhikang Zhang <zhikang.zhang@nxp.com>
Signed-off-by: Wenbin Song <wenbin.song@nxp.com>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
