[PATCH v4 12/24] nvme: add missing mandatory features

[Klaus Jensen]

Add support for returning a resonable response to Get/Set Features of
mandatory features.

Signed-off-by: Klaus Jensen <address@hidden>
---
 hw/block/nvme.c       | 58 ++++++++++++++++++++++++++++++++++++++++---
 hw/block/trace-events |  2 ++
 include/block/nvme.h  |  3 ++-
 3 files changed, 59 insertions(+), 4 deletions(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 113b64ea1843..3d870ac55984 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -1003,9 +1003,18 @@ static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, 
NvmeCmd *cmd)
 static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
 {
     uint32_t dw10 = le32_to_cpu(cmd->cdw10);
+    uint32_t dw11 = le32_to_cpu(cmd->cdw11);
     uint32_t result;
 
+    trace_nvme_dev_getfeat(nvme_cid(req), dw10);
+
     switch (dw10) {
+    case NVME_ARBITRATION:
+        result = cpu_to_le32(n->features.arbitration);
+        break;
+    case NVME_POWER_MANAGEMENT:
+        result = cpu_to_le32(n->features.power_mgmt);
+        break;
     case NVME_TEMPERATURE_THRESHOLD:
         result = 0;
 
@@ -1026,6 +1035,9 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd 
*cmd, NvmeRequest *req)
             break;
         }
 
+        break;
+    case NVME_ERROR_RECOVERY:
+        result = cpu_to_le32(n->features.err_rec);
         break;
     case NVME_VOLATILE_WRITE_CACHE:
         result = blk_enable_write_cache(n->conf.blk);
@@ -1038,6 +1050,19 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd 
*cmd, NvmeRequest *req)
         break;
     case NVME_TIMESTAMP:
         return nvme_get_feature_timestamp(n, cmd);
+    case NVME_INTERRUPT_COALESCING:
+        result = cpu_to_le32(n->features.int_coalescing);
+        break;
+    case NVME_INTERRUPT_VECTOR_CONF:
+        if ((dw11 & 0xffff) > n->params.num_queues) {
+            return NVME_INVALID_FIELD | NVME_DNR;
+        }
+
+        result = cpu_to_le32(n->features.int_vector_config[dw11 & 0xffff]);
+        break;
+    case NVME_WRITE_ATOMICITY:
+        result = cpu_to_le32(n->features.write_atomicity);
+        break;
     case NVME_ASYNCHRONOUS_EVENT_CONF:
         result = cpu_to_le32(n->features.async_config);
         break;
@@ -1073,6 +1098,8 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd 
*cmd, NvmeRequest *req)
     uint32_t dw10 = le32_to_cpu(cmd->cdw10);
     uint32_t dw11 = le32_to_cpu(cmd->cdw11);
 
+    trace_nvme_dev_setfeat(nvme_cid(req), dw10, dw11);
+
     switch (dw10) {
     case NVME_TEMPERATURE_THRESHOLD:
         if (NVME_TEMP_TMPSEL(dw11)) {
@@ -1113,6 +1140,13 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd 
*cmd, NvmeRequest *req)
     case NVME_ASYNCHRONOUS_EVENT_CONF:
         n->features.async_config = dw11;
         break;
+    case NVME_ARBITRATION:
+    case NVME_POWER_MANAGEMENT:
+    case NVME_ERROR_RECOVERY:
+    case NVME_INTERRUPT_COALESCING:
+    case NVME_INTERRUPT_VECTOR_CONF:
+    case NVME_WRITE_ATOMICITY:
+        return NVME_FEAT_NOT_CHANGABLE | NVME_DNR;
     default:
         trace_nvme_dev_err_invalid_setfeat(dw10);
         return NVME_INVALID_FIELD | NVME_DNR;
@@ -1686,6 +1720,21 @@ static void nvme_init_state(NvmeCtrl *n)
     n->temperature = NVME_TEMPERATURE;
     n->features.temp_thresh_hi = le16_to_cpu(n->id_ctrl.wctemp);
     n->starttime_ms = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
+
+    /*
+     * There is no limit on the number of commands that the controller may
+     * launch at one time from a particular Submission Queue.
+     */
+    n->features.arbitration = 0x7;
+
+    n->features.int_vector_config = g_malloc0_n(n->params.num_queues,
+        sizeof(*n->features.int_vector_config));
+
+    /* disable coalescing (not supported) */
+    for (int i = 0; i < n->params.num_queues; i++) {
+        n->features.int_vector_config[i] = i | (1 << 16);
+    }
+
     n->aer_reqs = g_new0(NvmeRequest *, n->params.aerl + 1);
 }
 
@@ -1779,15 +1828,17 @@ static void nvme_init_ctrl(NvmeCtrl *n)
     id->nn = cpu_to_le32(n->num_namespaces);
     id->oncs = cpu_to_le16(NVME_ONCS_WRITE_ZEROS | NVME_ONCS_TIMESTAMP);
 
+
+    if (blk_enable_write_cache(n->conf.blk)) {
+        id->vwc = 1;
+    }
+
     strcpy((char *) id->subnqn, "nqn.2019-08.org.qemu:");
     pstrcat((char *) id->subnqn, sizeof(id->subnqn), n->params.serial);
 
     id->psd[0].mp = cpu_to_le16(0x9c4);
     id->psd[0].enlat = cpu_to_le32(0x10);
     id->psd[0].exlat = cpu_to_le32(0x4);
-    if (blk_enable_write_cache(n->conf.blk)) {
-        id->vwc = 1;
-    }
 
     n->bar.cap = 0;
     NVME_CAP_SET_MQES(n->bar.cap, 0x7ff);
@@ -1858,6 +1909,7 @@ static void nvme_exit(PCIDevice *pci_dev)
     g_free(n->cq);
     g_free(n->sq);
     g_free(n->aer_reqs);
+    g_free(n->features.int_vector_config);
 
     if (n->params.cmb_size_mb) {
         g_free(n->cmbuf);
diff --git a/hw/block/trace-events b/hw/block/trace-events
index 3952c36774cf..4cf39961989d 100644
--- a/hw/block/trace-events
+++ b/hw/block/trace-events
@@ -41,6 +41,8 @@ nvme_dev_del_cq(uint16_t cqid) "deleted completion queue, 
sqid=%"PRIu16""
 nvme_dev_identify_ctrl(void) "identify controller"
 nvme_dev_identify_ns(uint16_t ns) "identify namespace, nsid=%"PRIu16""
 nvme_dev_identify_nslist(uint16_t ns) "identify namespace list, nsid=%"PRIu16""
+nvme_dev_getfeat(uint16_t cid, uint32_t fid) "cid %"PRIu16" fid 0x%"PRIx32""
+nvme_dev_setfeat(uint16_t cid, uint32_t fid, uint32_t val) "cid %"PRIu16" fid 
0x%"PRIx32" val 0x%"PRIx32""
 nvme_dev_getfeat_vwcache(const char* result) "get feature volatile write 
cache, result=%s"
 nvme_dev_getfeat_numq(int result) "get feature number of queues, result=%d"
 nvme_dev_setfeat_numq(int reqcq, int reqsq, int gotcq, int gotsq) "requested 
cq_count=%d sq_count=%d, responding with cq_count=%d sq_count=%d"
diff --git a/include/block/nvme.h b/include/block/nvme.h
index a24be047a311..09419ed499d0 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -445,7 +445,8 @@ enum NvmeStatusCodes {
     NVME_FW_REQ_RESET           = 0x010b,
     NVME_INVALID_QUEUE_DEL      = 0x010c,
     NVME_FID_NOT_SAVEABLE       = 0x010d,
-    NVME_FID_NOT_NSID_SPEC      = 0x010f,
+    NVME_FEAT_NOT_CHANGABLE     = 0x010e,
+    NVME_FEAT_NOT_NSID_SPEC     = 0x010f,
     NVME_FW_REQ_SUSYSTEM_RESET  = 0x0110,
     NVME_CONFLICTING_ATTRS      = 0x0180,
     NVME_INVALID_PROT_INFO      = 0x0181,
-- 
2.24.1