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[95.90.192.255]) by smtp.gmail.com with ESMTPSA id w15sm8580wmi.3.2021.07.26.06.23.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Jul 2021 06:23:26 -0700 (PDT) From: shiva.linuxworks@gmail.com X-Google-Original-From: sshivamurthy@micron.com To: rjw@rjwysocki.net, pavel@ucw.cz, len.brown@intel.com, linux-pm@vger.kernel.org, kbusch@kernel.org, axboe@fb.com, hch@lst.de, sagi@grimberg.me, linux-nvme@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Shivamurthy Shastri Subject: [PATCH v2 2/2] nvme: Add abrupt shutdown support Date: Mon, 26 Jul 2021 13:22:23 +0000 Message-Id: <20210726132223.1661-3-sshivamurthy@micron.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210726132223.1661-1-sshivamurthy@micron.com> References: <20210726132223.1661-1-sshivamurthy@micron.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shivamurthy Shastri Enabling the abrupt shutdown support. In this shutdown type, the host does not need to send Delete I/O Submission Queue and Delete I/O Completion Queue commands to the device. Signed-off-by: Shivamurthy Shastri --- drivers/nvme/host/core.c | 7 ++++++- drivers/nvme/host/pci.c | 6 ++++-- 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 11779be42186..760ffb071c1b 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include "nvme.h" @@ -2159,7 +2160,11 @@ int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl) int ret; ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; - ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; + + if (pm_power_loss_imminent()) + ctrl->ctrl_config |= NVME_CC_SHN_ABRUPT; + else + ctrl->ctrl_config |= NVME_CC_SHN_NORMAL; ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); if (ret) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 320051f5a3dd..07be319f63d9 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -2524,13 +2525,14 @@ static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) * Give the controller a chance to complete all entered requests if * doing a safe shutdown. */ - if (!dead && shutdown && freeze) + if (!dead && shutdown && !pm_power_loss_imminent() && freeze) nvme_wait_freeze_timeout(&dev->ctrl, NVME_IO_TIMEOUT); nvme_stop_queues(&dev->ctrl); if (!dead && dev->ctrl.queue_count > 0) { - nvme_disable_io_queues(dev); + if (!pm_power_loss_imminent()) + nvme_disable_io_queues(dev); nvme_disable_admin_queue(dev, shutdown); } nvme_suspend_io_queues(dev); -- 2.25.1