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09 Jun 2021 18:06:15 -0700 IronPort-SDR: 1lD2rJqimc+epxxee8BSTJEdbHKdz23EbcxXiT2f6mTEEDmfi9wNZVMHoFfFvePLjFsFnSBnTU wovMhRfjKZ0yUlXL+PVYI4wTy9RpSDbWhiUymFQVyznFQO7klKndv6pWJg4csNNiC/6piTVgCd ckwGfoft4LChEWEYJJH62X3sGgcxVCaZ2nnOUPkfm9gyJIBRe7VJjZtRnF6KKxRZ3+5HOZzqzb trcVBDBZvWEvsUvtVE2lWFPAD7t8bk8xG+PZsb0XgGddWHcIqVTPD/NQgZNhi9oC4Bx7HlsixV VVY= WDCIronportException: Internal Received: from vm.labspan.wdc.com (HELO vm.sc.wdc.com) ([10.6.137.102]) by uls-op-cesaip02.wdc.com with ESMTP; 09 Jun 2021 18:28:36 -0700 From: Chaitanya Kulkarni To: linux-nvme@lists.infradead.org Cc: hch@lst.de, Chaitanya Kulkarni Subject: [PATCH 1/4] nvme: add a helper to check ctrl sgl support Date: Wed, 9 Jun 2021 18:28:23 -0700 Message-Id: <20210610012826.53398-2-chaitanya.kulkarni@wdc.com> X-Mailer: git-send-email 2.22.1.dirty In-Reply-To: <20210610012826.53398-1-chaitanya.kulkarni@wdc.com> References: <20210610012826.53398-1-chaitanya.kulkarni@wdc.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210609_182837_931635_6B1649B6 X-CRM114-Status: GOOD ( 10.49 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org 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 --- drivers/nvme/host/nvme.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 1f397ecba16c..1aab74128d40 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -869,6 +869,14 @@ static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl) } #endif +static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl) +{ + if (!(ctrl->sgls & ((1 << 0) | (1 << 1)))) + return true; + + return false; +} + u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode); void nvme_execute_passthru_rq(struct request *rq); -- 2.22.1 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme