hw/nvme: add basic endurance group support

Add the mandatory Endurance Group identify data structures and log
pages.

For now, all namespaces in a subsystem belongs to a single Endurance
Group.

Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>

3 files changed, 58 insertions, 1 deletions

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index 99b92ff20b..4bfc7835b5 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -4454,6 +4454,48 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
     return nvme_c2h(n, (uint8_t *) &smart + off, trans_len, req);
 }
 
+static uint16_t nvme_endgrp_info(NvmeCtrl *n,  uint8_t rae, uint32_t buf_len,
+                                 uint64_t off, NvmeRequest *req)
+{
+    uint32_t dw11 = le32_to_cpu(req->cmd.cdw11);
+    uint16_t endgrpid = (dw11 >> 16) & 0xffff;
+    struct nvme_stats stats = {};
+    NvmeEndGrpLog info = {};
+    int i;
+
+    if (!n->subsys || endgrpid != 0x1) {
+        return NVME_INVALID_FIELD | NVME_DNR;
+    }
+
+    if (off >= sizeof(info)) {
+        return NVME_INVALID_FIELD | NVME_DNR;
+    }
+
+    for (i = 1; i <= NVME_MAX_NAMESPACES; i++) {
+        NvmeNamespace *ns = nvme_subsys_ns(n->subsys, i);
+        if (!ns) {
+            continue;
+        }
+
+        nvme_set_blk_stats(ns, &stats);
+    }
+
+    info.data_units_read[0] =
+        cpu_to_le64(DIV_ROUND_UP(stats.units_read / 1000000000, 1000000000));
+    info.data_units_written[0] =
+        cpu_to_le64(DIV_ROUND_UP(stats.units_written / 1000000000, 1000000000));
+    info.media_units_written[0] =
+        cpu_to_le64(DIV_ROUND_UP(stats.units_written / 1000000000, 1000000000));
+
+    info.host_read_commands[0] = cpu_to_le64(stats.read_commands);
+    info.host_write_commands[0] = cpu_to_le64(stats.write_commands);
+
+    buf_len = MIN(sizeof(info) - off, buf_len);
+
+    return nvme_c2h(n, (uint8_t *)&info + off, buf_len, req);
+}
+
+
 static uint16_t nvme_fw_log_info(NvmeCtrl *n, uint32_t buf_len, uint64_t off,
                                  NvmeRequest *req)
 {
@@ -4626,6 +4668,8 @@ static uint16_t nvme_get_log(NvmeCtrl *n, NvmeRequest *req)
         return nvme_changed_nslist(n, rae, len, off, req);
     case NVME_LOG_CMD_EFFECTS:
         return nvme_cmd_effects(n, csi, len, off, req);
+    case NVME_LOG_ENDGRP:
+        return nvme_endgrp_info(n, rae, len, off, req);
     default:
         trace_pci_nvme_err_invalid_log_page(nvme_cid(req), lid);
         return NVME_INVALID_FIELD | NVME_DNR;
@@ -7382,6 +7426,7 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice *pci_dev)
     uint8_t *pci_conf = pci_dev->config;
     uint64_t cap = ldq_le_p(&n->bar.cap);
     NvmeSecCtrlEntry *sctrl = nvme_sctrl(n);
+    uint32_t ctratt;
 
     id->vid = cpu_to_le16(pci_get_word(pci_conf + PCI_VENDOR_ID));
     id->ssvid = cpu_to_le16(pci_get_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID));
@@ -7392,7 +7437,7 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice *pci_dev)
     id->cntlid = cpu_to_le16(n->cntlid);
 
     id->oaes = cpu_to_le32(NVME_OAES_NS_ATTR);
-    id->ctratt |= cpu_to_le32(NVME_CTRATT_ELBAS);
+    ctratt = NVME_CTRATT_ELBAS;
 
     id->rab = 6;
 
@@ -7459,8 +7504,13 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice *pci_dev)
 
     if (n->subsys) {
         id->cmic |= NVME_CMIC_MULTI_CTRL;
+        ctratt |= NVME_CTRATT_ENDGRPS;
+
+        id->endgidmax = cpu_to_le16(0x1);
     }
 
+    id->ctratt = cpu_to_le32(ctratt);
+
     NVME_CAP_SET_MQES(cap, 0x7ff);
     NVME_CAP_SET_CQR(cap, 1);
     NVME_CAP_SET_TO(cap, 0xf);
diff --git a/hw/nvme/ns.c b/hw/nvme/ns.c
index 8ebab4fbce..23872a174c 100644
--- a/hw/nvme/ns.c
+++ b/hw/nvme/ns.c
@@ -592,6 +592,8 @@ static void nvme_ns_realize(DeviceState *dev, Error **errp)
     if (subsys) {
         subsys->namespaces[nsid] = ns;
 
+        ns->id_ns.endgid = cpu_to_le16(0x1);
+
         if (ns->params.detached) {
             return;
         }
@@ -607,6 +609,7 @@ static void nvme_ns_realize(DeviceState *dev, Error **errp)
 
             return;
         }
+
     }
 
     nvme_attach_ns(n, ns);
diff --git a/hw/nvme/nvme.h b/hw/nvme/nvme.h
index 5d221073ac..a88e0dea5c 100644
--- a/hw/nvme/nvme.h
+++ b/hw/nvme/nvme.h
@@ -45,6 +45,10 @@ typedef struct NvmeBus {
     OBJECT_CHECK(NvmeSubsystem, (obj), TYPE_NVME_SUBSYS)
 #define SUBSYS_SLOT_RSVD (void *)0xFFFF
 
+typedef struct NvmeEnduranceGroup {
+    uint8_t event_conf;
+} NvmeEnduranceGroup;
+
 typedef struct NvmeSubsystem {
     DeviceState parent_obj;
     NvmeBus     bus;