Messages in this thread Patch in this message | | | From | Matias Bjørling <> | Subject | [PATCH v2 1/1] nvme: implement log page low/high offset and dwords | Date | Mon, 26 Feb 2018 13:55:40 +0100 |
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NVMe 1.2.1 extends the get log page interface to include 64 bit offset and increases the number of dwords to 32 bits. Implement for future use.
Signed-off-by: Matias Bjørling <mb@lightnvm.io> --- drivers/nvme/host/core.c | 36 ++++++++++++++++++++++++------------ 1 file changed, 24 insertions(+), 12 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 740ceb28067c..2e9e9f973a75 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -80,11 +80,6 @@ static struct class *nvme_subsys_class; static void nvme_ns_remove(struct nvme_ns *ns); static int nvme_revalidate_disk(struct gendisk *disk); -static __le32 nvme_get_log_dw10(u8 lid, size_t size) -{ - return cpu_to_le32((((size / 4) - 1) << 16) | lid); -} - int nvme_reset_ctrl(struct nvme_ctrl *ctrl) { if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) @@ -2132,16 +2127,33 @@ static int nvme_init_subsystem(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) return ret; } +static int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns, + u8 log_page, void *log, + size_t size, size_t offset) +{ + struct nvme_command c = { }; + unsigned long dwlen = size / 4 - 1; + + c.get_log_page.opcode = nvme_admin_get_log_page; + + if (ns) + c.get_log_page.nsid = cpu_to_le32(ns->head->ns_id); + else + c.get_log_page.nsid = cpu_to_le32(NVME_NSID_ALL); + + c.get_log_page.lid = log_page; + c.get_log_page.numdl = cpu_to_le16(dwlen & ((1 << 16) - 1)); + c.get_log_page.numdu = cpu_to_le16(dwlen >> 16); + c.get_log_page.lpol = cpu_to_le32(offset & ((1ULL << 32) - 1)); + c.get_log_page.lpou = cpu_to_le32(offset >> 32ULL); + + return nvme_submit_sync_cmd(ctrl->admin_q, &c, log, size); +} + static int nvme_get_log(struct nvme_ctrl *ctrl, u8 log_page, void *log, size_t size) { - struct nvme_command c = { }; - - c.common.opcode = nvme_admin_get_log_page; - c.common.nsid = cpu_to_le32(NVME_NSID_ALL); - c.common.cdw10[0] = nvme_get_log_dw10(log_page, size); - - return nvme_submit_sync_cmd(ctrl->admin_q, &c, log, size); + return nvme_get_log_ext(ctrl, NULL, log_page, log, size, 0); } static int nvme_get_effects_log(struct nvme_ctrl *ctrl) -- 2.11.0
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