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nvme: add a helper to check ctrl sgl support

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For various transports such as fc/tcp/pci it is common to check if
NVMe SGLs are supported or not by the controller.

In this preparation patch we add a helper to avoid the open coding of
such checks in the various transport.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Chaitanya Kulkarni 2021-06-09 18:28:23 -07:00 • committed by Christoph Hellwig
parent cb1b10e7ac
commit 73eefc270a
1 changed files with 5 additions and 0 deletions
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5
drivers/nvme/host/nvme.h
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@ -869,6 +869,11 @@ static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
}
#endif
static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
{
return ctrl->sgls & ((1 << 0) | (1 << 1));
}
u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
u8 opcode);
void nvme_execute_passthru_rq(struct request *rq);