From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Date: Thu, 10 Jun 2021 01:28:23 +0000 (-0700)
Subject: nvme: add a helper to check ctrl sgl support
X-Git-Tag: microblaze-v5.15~128^2^2~28
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=73eefc270afa1f27d82c42fdb34562d07a834b40;p=linux-2.6-microblaze.git

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 <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---

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);