[PATCH v4 02/14] hw/block/nvme: Add Commands Supported and Effects log

[Dmitry Fomichev <dmitry.fomichev@wdc.com>]

This log page becomes necessary to implement to allow checking for
Zone Append command support in Zoned Namespace Command Set.

This commit adds the code to report this log page for NVM Command
Set only. The parts that are specific to zoned operation will be
added later in the series.

Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
---
 hw/block/nvme.c       | 44 ++++++++++++++++++++++++++++++++++++++++++-
 hw/block/trace-events |  2 ++
 include/block/nvme.h  | 19 +++++++++++++++++++
 3 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index f60e968c4a..7807f296d3 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -957,6 +957,46 @@ static uint16_t nvme_error_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
                         DMA_DIRECTION_FROM_DEVICE, req);
 }
 
+static uint16_t nvme_cmd_effects(NvmeCtrl *n, uint32_t buf_len,
+                                 uint64_t off, NvmeRequest *req)
+{
+    NvmeCmd *cmd = &req->cmd;
+    uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
+    uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
+    NvmeEffectsLog cmd_eff_log = {};
+    uint32_t *iocs = cmd_eff_log.iocs;
+    uint32_t *acs = cmd_eff_log.acs;
+    uint32_t trans_len;
+
+    trace_pci_nvme_cmd_supp_and_effects_log_read();
+
+    if (off >= sizeof(cmd_eff_log)) {
+        trace_pci_nvme_err_invalid_effects_log_offset(off);
+        return NVME_INVALID_FIELD | NVME_DNR;
+    }
+
+    acs[NVME_ADM_CMD_DELETE_SQ] = NVME_CMD_EFFECTS_CSUPP;
+    acs[NVME_ADM_CMD_CREATE_SQ] = NVME_CMD_EFFECTS_CSUPP;
+    acs[NVME_ADM_CMD_DELETE_CQ] = NVME_CMD_EFFECTS_CSUPP;
+    acs[NVME_ADM_CMD_CREATE_CQ] = NVME_CMD_EFFECTS_CSUPP;
+    acs[NVME_ADM_CMD_IDENTIFY] = NVME_CMD_EFFECTS_CSUPP;
+    acs[NVME_ADM_CMD_SET_FEATURES] = NVME_CMD_EFFECTS_CSUPP;
+    acs[NVME_ADM_CMD_GET_FEATURES] = NVME_CMD_EFFECTS_CSUPP;
+    acs[NVME_ADM_CMD_GET_LOG_PAGE] = NVME_CMD_EFFECTS_CSUPP;
+    acs[NVME_ADM_CMD_ASYNC_EV_REQ] = NVME_CMD_EFFECTS_CSUPP;
+
+    iocs[NVME_CMD_FLUSH] = NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC;
+    iocs[NVME_CMD_WRITE_ZEROES] = NVME_CMD_EFFECTS_CSUPP |
+                                  NVME_CMD_EFFECTS_LBCC;
+    iocs[NVME_CMD_WRITE] = NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC;
+    iocs[NVME_CMD_READ] = NVME_CMD_EFFECTS_CSUPP;
+
+    trans_len = MIN(sizeof(cmd_eff_log) - off, buf_len);
+
+    return nvme_dma_prp(n, ((uint8_t *)&cmd_eff_log) + off, trans_len,
+                        prp1, prp2, DMA_DIRECTION_FROM_DEVICE, req);
+}
+
 static uint16_t nvme_get_log(NvmeCtrl *n, NvmeRequest *req)
 {
     NvmeCmd *cmd = &req->cmd;
@@ -1000,6 +1040,8 @@ static uint16_t nvme_get_log(NvmeCtrl *n, NvmeRequest *req)
         return nvme_smart_info(n, rae, len, off, req);
     case NVME_LOG_FW_SLOT_INFO:
         return nvme_fw_log_info(n, len, off, req);
+    case NVME_LOG_CMD_EFFECTS:
+        return nvme_cmd_effects(n, len, off, req);
     default:
         trace_pci_nvme_err_invalid_log_page(nvme_cid(req), lid);
         return NVME_INVALID_FIELD | NVME_DNR;
@@ -2350,7 +2392,7 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice *pci_dev)
     id->acl = 3;
     id->aerl = n->params.aerl;
     id->frmw = (NVME_NUM_FW_SLOTS << 1) | NVME_FRMW_SLOT1_RO;
-    id->lpa = NVME_LPA_EXTENDED;
+    id->lpa = NVME_LPA_CSE | NVME_LPA_EXTENDED;
 
     /* recommended default value (~70 C) */
     id->wctemp = cpu_to_le16(NVME_TEMPERATURE_WARNING);
diff --git a/hw/block/trace-events b/hw/block/trace-events
index 72cf2d15cb..79c9da652d 100644
--- a/hw/block/trace-events
+++ b/hw/block/trace-events
@@ -83,6 +83,7 @@ pci_nvme_mmio_start_success(void) "setting controller enable bit succeeded"
 pci_nvme_mmio_stopped(void) "cleared controller enable bit"
 pci_nvme_mmio_shutdown_set(void) "shutdown bit set"
 pci_nvme_mmio_shutdown_cleared(void) "shutdown bit cleared"
+pci_nvme_cmd_supp_and_effects_log_read(void) "commands supported and effects log read"
 
 # nvme traces for error conditions
 pci_nvme_err_mdts(uint16_t cid, size_t len) "cid %"PRIu16" len %zu"
@@ -95,6 +96,7 @@ pci_nvme_err_invalid_ns(uint32_t ns, uint32_t limit) "invalid namespace %u not w
 pci_nvme_err_invalid_opc(uint8_t opc) "invalid opcode 0x%"PRIx8""
 pci_nvme_err_invalid_admin_opc(uint8_t opc) "invalid admin opcode 0x%"PRIx8""
 pci_nvme_err_invalid_lba_range(uint64_t start, uint64_t len, uint64_t limit) "Invalid LBA start=%"PRIu64" len=%"PRIu64" limit=%"PRIu64""
+pci_nvme_err_invalid_effects_log_offset(uint64_t ofs) "commands supported and effects log offset must be 0, got %"PRIu64""
 pci_nvme_err_invalid_del_sq(uint16_t qid) "invalid submission queue deletion, sid=%"PRIu16""
 pci_nvme_err_invalid_create_sq_cqid(uint16_t cqid) "failed creating submission queue, invalid cqid=%"PRIu16""
 pci_nvme_err_invalid_create_sq_sqid(uint16_t sqid) "failed creating submission queue, invalid sqid=%"PRIu16""
diff --git a/include/block/nvme.h b/include/block/nvme.h
index 65e68a82c8..71126ae1ff 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -734,10 +734,27 @@ enum NvmeSmartWarn {
     NVME_SMART_FAILED_VOLATILE_MEDIA  = 1 << 4,
 };
 
+typedef struct NvmeEffectsLog {
+    uint32_t    acs[256];
+    uint32_t    iocs[256];
+    uint8_t     resv[2048];
+} NvmeEffectsLog;
+
+enum {
+    NVME_CMD_EFFECTS_CSUPP             = 1 << 0,
+    NVME_CMD_EFFECTS_LBCC              = 1 << 1,
+    NVME_CMD_EFFECTS_NCC               = 1 << 2,
+    NVME_CMD_EFFECTS_NIC               = 1 << 3,
+    NVME_CMD_EFFECTS_CCC               = 1 << 4,
+    NVME_CMD_EFFECTS_CSE_MASK          = 3 << 16,
+    NVME_CMD_EFFECTS_UUID_SEL          = 1 << 19,
+};
+
 enum NvmeLogIdentifier {
     NVME_LOG_ERROR_INFO     = 0x01,
     NVME_LOG_SMART_INFO     = 0x02,
     NVME_LOG_FW_SLOT_INFO   = 0x03,
+    NVME_LOG_CMD_EFFECTS    = 0x05,
 };
 
 typedef struct QEMU_PACKED NvmePSD {
@@ -849,6 +866,7 @@ enum NvmeIdCtrlFrmw {
 };
 
 enum NvmeIdCtrlLpa {
+    NVME_LPA_CSE      = 1 << 1,
     NVME_LPA_EXTENDED = 1 << 2,
 };
 
@@ -1048,6 +1066,7 @@ static inline void _nvme_check_size(void)
     QEMU_BUILD_BUG_ON(sizeof(NvmeErrorLog) != 64);
     QEMU_BUILD_BUG_ON(sizeof(NvmeFwSlotInfoLog) != 512);
     QEMU_BUILD_BUG_ON(sizeof(NvmeSmartLog) != 512);
+    QEMU_BUILD_BUG_ON(sizeof(NvmeEffectsLog) != 4096);
     QEMU_BUILD_BUG_ON(sizeof(NvmeIdCtrl) != 4096);
     QEMU_BUILD_BUG_ON(sizeof(NvmeIdNs) != 4096);
     QEMU_BUILD_BUG_ON(sizeof(NvmeSglDescriptor) != 16);
-- 
2.21.0