[PULL 19/23] hw/nvme: fix endianess conversion and add controller list

[Klaus Jensen <its@irrelevant.dk>]

From: Gollu Appalanaidu <anaidu.gollu@samsung.com>

Add the controller identifiers list CNS 0x13, available list of ctrls
in NVM Subsystem that may or may not be attached to namespaces.

In Identify Ctrl List of the CNS 0x12 and 0x13 no endian conversion
for the nsid field.

These two CNS values shows affect when there exists a Subsystem.
Added condition if there is no Subsystem return invalid field in
command.

Signed-off-by: Gollu Appalanaidu <anaidu.gollu@samsung.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 include/block/nvme.h |  1 +
 hw/nvme/ctrl.c       | 26 ++++++++++++++++++--------
 hw/nvme/trace-events |  2 +-
 3 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/include/block/nvme.h b/include/block/nvme.h
index 0fabe28b7bdd..527105fafc0b 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -988,6 +988,7 @@ enum NvmeIdCns {
     NVME_ID_CNS_NS_PRESENT_LIST       = 0x10,
     NVME_ID_CNS_NS_PRESENT            = 0x11,
     NVME_ID_CNS_NS_ATTACHED_CTRL_LIST = 0x12,
+    NVME_ID_CNS_CTRL_LIST             = 0x13,
     NVME_ID_CNS_CS_NS_PRESENT_LIST    = 0x1a,
     NVME_ID_CNS_CS_NS_PRESENT         = 0x1b,
     NVME_ID_CNS_IO_COMMAND_SET        = 0x1c,
diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index 6a0c2cc48422..541c0819d5b0 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -4449,9 +4449,11 @@ static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req, bool active)
     return NVME_INVALID_CMD_SET | NVME_DNR;
 }
 
-static uint16_t nvme_identify_ns_attached_list(NvmeCtrl *n, NvmeRequest *req)
+static uint16_t nvme_identify_ctrl_list(NvmeCtrl *n, NvmeRequest *req,
+                                        bool attached)
 {
     NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
+    uint32_t nsid = le32_to_cpu(c->nsid);
     uint16_t min_id = le16_to_cpu(c->ctrlid);
     uint16_t list[NVME_CONTROLLER_LIST_SIZE] = {};
     uint16_t *ids = &list[1];
@@ -4459,15 +4461,21 @@ static uint16_t nvme_identify_ns_attached_list(NvmeCtrl *n, NvmeRequest *req)
     NvmeCtrl *ctrl;
     int cntlid, nr_ids = 0;
 
-    trace_pci_nvme_identify_ns_attached_list(min_id);
+    trace_pci_nvme_identify_ctrl_list(c->cns, min_id);
 
-    if (c->nsid == NVME_NSID_BROADCAST) {
+    if (!n->subsys) {
         return NVME_INVALID_FIELD | NVME_DNR;
     }
 
-    ns = nvme_subsys_ns(n->subsys, c->nsid);
-    if (!ns) {
-        return NVME_INVALID_FIELD | NVME_DNR;
+    if (attached) {
+        if (nsid == NVME_NSID_BROADCAST) {
+            return NVME_INVALID_FIELD | NVME_DNR;
+        }
+
+        ns = nvme_subsys_ns(n->subsys, nsid);
+        if (!ns) {
+            return NVME_INVALID_FIELD | NVME_DNR;
+        }
     }
 
     for (cntlid = min_id; cntlid < ARRAY_SIZE(n->subsys->ctrls); cntlid++) {
@@ -4476,7 +4484,7 @@ static uint16_t nvme_identify_ns_attached_list(NvmeCtrl *n, NvmeRequest *req)
             continue;
         }
 
-        if (!nvme_ns(ctrl, c->nsid)) {
+        if (attached && !nvme_ns(ctrl, nsid)) {
             continue;
         }
 
@@ -4703,7 +4711,9 @@ static uint16_t nvme_identify(NvmeCtrl *n, NvmeRequest *req)
     case NVME_ID_CNS_NS_PRESENT:
         return nvme_identify_ns(n, req, false);
     case NVME_ID_CNS_NS_ATTACHED_CTRL_LIST:
-        return nvme_identify_ns_attached_list(n, req);
+        return nvme_identify_ctrl_list(n, req, true);
+    case NVME_ID_CNS_CTRL_LIST:
+        return nvme_identify_ctrl_list(n, req, false);
     case NVME_ID_CNS_CS_NS:
         return nvme_identify_ns_csi(n, req, true);
     case NVME_ID_CNS_CS_NS_PRESENT:
diff --git a/hw/nvme/trace-events b/hw/nvme/trace-events
index 48d10c36e85b..f9a1f14e2638 100644
--- a/hw/nvme/trace-events
+++ b/hw/nvme/trace-events
@@ -51,7 +51,7 @@ pci_nvme_identify(uint16_t cid, uint8_t cns, uint16_t ctrlid, uint8_t csi) "cid
 pci_nvme_identify_ctrl(void) "identify controller"
 pci_nvme_identify_ctrl_csi(uint8_t csi) "identify controller, csi=0x%"PRIx8""
 pci_nvme_identify_ns(uint32_t ns) "nsid %"PRIu32""
-pci_nvme_identify_ns_attached_list(uint16_t cntid) "cntid=%"PRIu16""
+pci_nvme_identify_ctrl_list(uint8_t cns, uint16_t cntid) "cns 0x%"PRIx8" cntid %"PRIu16""
 pci_nvme_identify_ns_csi(uint32_t ns, uint8_t csi) "nsid=%"PRIu32", csi=0x%"PRIx8""
 pci_nvme_identify_nslist(uint32_t ns) "nsid %"PRIu32""
 pci_nvme_identify_nslist_csi(uint16_t ns, uint8_t csi) "nsid=%"PRIu16", csi=0x%"PRIx8""
-- 
2.32.0