nvme: add keep-alive support

[mirror_ubuntu-artful-kernel.git] / drivers / nvme / host / nvme.h

diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index ef28d4e33bf1995674b53bf4be8a3dbdfb4bf40e..8d8cbc437699cbe9fad732967f4981510c718d3f 100644 (file)
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -38,6 +38,9 @@ extern unsigned char admin_timeout;
 extern unsigned char shutdown_timeout;
 #define SHUTDOWN_TIMEOUT       (shutdown_timeout * HZ)
 
+#define NVME_DEFAULT_KATO      5
+#define NVME_KATO_GRACE                10
+
 enum {
        NVME_NS_LBA             = 0,
        NVME_NS_LIGHTNVM        = 1,
@@ -109,10 +112,13 @@ struct nvme_ctrl {
        u8 vwc;
        u32 vs;
        u32 sgls;
+       u16 kas;
+       unsigned int kato;
        bool subsystem;
        unsigned long quirks;
        struct work_struct scan_work;
        struct work_struct async_event_work;
+       struct delayed_work ka_work;
 
        /* Fabrics only */
        u16 sqsize;
@@ -273,6 +279,8 @@ int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid,
 int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11,
                        dma_addr_t dma_addr, u32 *result);
 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
+void nvme_start_keep_alive(struct nvme_ctrl *ctrl);
+void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
 
 struct sg_io_hdr;