From 73eefc270afa1f27d82c42fdb34562d07a834b40 Mon Sep 17 00:00:00 2001 From: Chaitanya Kulkarni Date: Wed, 9 Jun 2021 18:28:23 -0700 Subject: [PATCH] nvme: add a helper to check ctrl sgl support 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 Signed-off-by: Christoph Hellwig --- drivers/nvme/host/nvme.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 1f397ecba16c..75420ceacc10 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -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); -- GitLab