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Re: [PATCH v6 04/42] nvme: bump spec data structures to v1.3


From: Maxim Levitsky
Subject: Re: [PATCH v6 04/42] nvme: bump spec data structures to v1.3
Date: Wed, 25 Mar 2020 12:37:02 +0200

On Mon, 2020-03-16 at 07:28 -0700, Klaus Jensen wrote:
> From: Klaus Jensen <address@hidden>
> 
> Add missing fields in the Identify Controller and Identify Namespace
> data structures to bring them in line with NVMe v1.3.
> 
> This also adds data structures and defines for SGL support which
> requires a couple of trivial changes to the nvme block driver as well.
> 
> Signed-off-by: Klaus Jensen <address@hidden>
> Acked-by: Fam Zheng <address@hidden>
> ---
>  block/nvme.c         |  18 ++---
>  hw/block/nvme.c      |  12 ++--
>  include/block/nvme.h | 153 ++++++++++++++++++++++++++++++++++++++-----
>  3 files changed, 151 insertions(+), 32 deletions(-)
> 
> diff --git a/block/nvme.c b/block/nvme.c
> index d41c4bda6e39..99b9bb3dac96 100644
> --- a/block/nvme.c
> +++ b/block/nvme.c
> @@ -446,7 +446,7 @@ static void nvme_identify(BlockDriverState *bs, int 
> namespace, Error **errp)
>          error_setg(errp, "Cannot map buffer for DMA");
>          goto out;
>      }
> -    cmd.prp1 = cpu_to_le64(iova);
> +    cmd.dptr.prp1 = cpu_to_le64(iova);
>  
>      if (nvme_cmd_sync(bs, s->queues[0], &cmd)) {
>          error_setg(errp, "Failed to identify controller");
> @@ -545,7 +545,7 @@ static bool nvme_add_io_queue(BlockDriverState *bs, Error 
> **errp)
>      }
>      cmd = (NvmeCmd) {
>          .opcode = NVME_ADM_CMD_CREATE_CQ,
> -        .prp1 = cpu_to_le64(q->cq.iova),
> +        .dptr.prp1 = cpu_to_le64(q->cq.iova),
>          .cdw10 = cpu_to_le32(((queue_size - 1) << 16) | (n & 0xFFFF)),
>          .cdw11 = cpu_to_le32(0x3),
>      };
> @@ -556,7 +556,7 @@ static bool nvme_add_io_queue(BlockDriverState *bs, Error 
> **errp)
>      }
>      cmd = (NvmeCmd) {
>          .opcode = NVME_ADM_CMD_CREATE_SQ,
> -        .prp1 = cpu_to_le64(q->sq.iova),
> +        .dptr.prp1 = cpu_to_le64(q->sq.iova),
>          .cdw10 = cpu_to_le32(((queue_size - 1) << 16) | (n & 0xFFFF)),
>          .cdw11 = cpu_to_le32(0x1 | (n << 16)),
>      };
> @@ -906,16 +906,16 @@ try_map:
>      case 0:
>          abort();
>      case 1:
> -        cmd->prp1 = pagelist[0];
> -        cmd->prp2 = 0;
> +        cmd->dptr.prp1 = pagelist[0];
> +        cmd->dptr.prp2 = 0;
>          break;
>      case 2:
> -        cmd->prp1 = pagelist[0];
> -        cmd->prp2 = pagelist[1];
> +        cmd->dptr.prp1 = pagelist[0];
> +        cmd->dptr.prp2 = pagelist[1];
>          break;
>      default:
> -        cmd->prp1 = pagelist[0];
> -        cmd->prp2 = cpu_to_le64(req->prp_list_iova + sizeof(uint64_t));
> +        cmd->dptr.prp1 = pagelist[0];
> +        cmd->dptr.prp2 = cpu_to_le64(req->prp_list_iova + sizeof(uint64_t));
>          break;
>      }
>      trace_nvme_cmd_map_qiov(s, cmd, req, qiov, entries);
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index b532818b4b76..40cb176dea3c 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -372,8 +372,8 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, 
> NvmeCmd *cmd,
>      NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
>      uint32_t nlb  = le32_to_cpu(rw->nlb) + 1;
>      uint64_t slba = le64_to_cpu(rw->slba);
> -    uint64_t prp1 = le64_to_cpu(rw->prp1);
> -    uint64_t prp2 = le64_to_cpu(rw->prp2);
> +    uint64_t prp1 = le64_to_cpu(rw->dptr.prp1);
> +    uint64_t prp2 = le64_to_cpu(rw->dptr.prp2);
>  
>      uint8_t lba_index  = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
>      uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds;
> @@ -763,8 +763,8 @@ static inline uint64_t nvme_get_timestamp(const NvmeCtrl 
> *n)
>  
>  static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd)
>  {
> -    uint64_t prp1 = le64_to_cpu(cmd->prp1);
> -    uint64_t prp2 = le64_to_cpu(cmd->prp2);
> +    uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
> +    uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>  
>      uint64_t timestamp = nvme_get_timestamp(n);
>  
> @@ -802,8 +802,8 @@ static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, 
> NvmeCmd *cmd)
>  {
>      uint16_t ret;
>      uint64_t timestamp;
> -    uint64_t prp1 = le64_to_cpu(cmd->prp1);
> -    uint64_t prp2 = le64_to_cpu(cmd->prp2);
> +    uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
> +    uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
>  
>      ret = nvme_dma_write_prp(n, (uint8_t *)&timestamp,
>                                  sizeof(timestamp), prp1, prp2);
> diff --git a/include/block/nvme.h b/include/block/nvme.h
> index 8fb941c6537c..a083c1b3a613 100644
> --- a/include/block/nvme.h
> +++ b/include/block/nvme.h
> @@ -205,15 +205,53 @@ enum NvmeCmbszMask {
>  #define NVME_CMBSZ_GETSIZE(cmbsz) \
>      (NVME_CMBSZ_SZ(cmbsz) * (1 << (12 + 4 * NVME_CMBSZ_SZU(cmbsz))))
>  
> +enum NvmeSglDescriptorType {
> +    NVME_SGL_DESCR_TYPE_DATA_BLOCK          = 0x0,
> +    NVME_SGL_DESCR_TYPE_BIT_BUCKET          = 0x1,
> +    NVME_SGL_DESCR_TYPE_SEGMENT             = 0x2,
> +    NVME_SGL_DESCR_TYPE_LAST_SEGMENT        = 0x3,
> +    NVME_SGL_DESCR_TYPE_KEYED_DATA_BLOCK    = 0x4,
> +
> +    NVME_SGL_DESCR_TYPE_VENDOR_SPECIFIC     = 0xf,
> +};
OK

> +
> +enum NvmeSglDescriptorSubtype {
> +    NVME_SGL_DESCR_SUBTYPE_ADDRESS = 0x0,
> +};
OK
> +
> +typedef struct NvmeSglDescriptor {
> +    uint64_t addr;
> +    uint32_t len;
> +    uint8_t  rsvd[3];
> +    uint8_t  type;
> +} NvmeSglDescriptor;
> +
> +#define NVME_SGL_TYPE(type)     ((type >> 4) & 0xf)
> +#define NVME_SGL_SUBTYPE(type)  (type & 0xf)
OK

> +
> +typedef union NvmeCmdDptr {
> +    struct {
> +        uint64_t    prp1;
> +        uint64_t    prp2;
> +    };
> +
> +    NvmeSglDescriptor sgl;
> +} NvmeCmdDptr;

> +
> +enum NvmePsdt {
> +    PSDT_PRP                 = 0x0,
> +    PSDT_SGL_MPTR_CONTIGUOUS = 0x1,
> +    PSDT_SGL_MPTR_SGL        = 0x2,
> +};
OK
> +
>  typedef struct NvmeCmd {
>      uint8_t     opcode;
> -    uint8_t     fuse;
> +    uint8_t     flags;
Yep, that makes sense, since this contains
more that fused operation control bits.
>      uint16_t    cid;
>      uint32_t    nsid;
>      uint64_t    res1;
>      uint64_t    mptr;
> -    uint64_t    prp1;
> -    uint64_t    prp2;
> +    NvmeCmdDptr dptr;
>      uint32_t    cdw10;
>      uint32_t    cdw11;
>      uint32_t    cdw12;
> @@ -222,6 +260,9 @@ typedef struct NvmeCmd {
>      uint32_t    cdw15;
>  } NvmeCmd;
>  
> +#define NVME_CMD_FLAGS_FUSE(flags) (flags & 0x3)
> +#define NVME_CMD_FLAGS_PSDT(flags) ((flags >> 6) & 0x3)
OK
> +
>  enum NvmeAdminCommands {
>      NVME_ADM_CMD_DELETE_SQ      = 0x00,
>      NVME_ADM_CMD_CREATE_SQ      = 0x01,
> @@ -321,8 +362,7 @@ typedef struct NvmeRwCmd {
>      uint32_t    nsid;
>      uint64_t    rsvd2;
>      uint64_t    mptr;
> -    uint64_t    prp1;
> -    uint64_t    prp2;
> +    NvmeCmdDptr dptr;
>      uint64_t    slba;
>      uint16_t    nlb;
>      uint16_t    control;
> @@ -362,8 +402,7 @@ typedef struct NvmeDsmCmd {
>      uint16_t    cid;
>      uint32_t    nsid;
>      uint64_t    rsvd2[2];
> -    uint64_t    prp1;
> -    uint64_t    prp2;
> +    NvmeCmdDptr dptr;
>      uint32_t    nr;
>      uint32_t    attributes;
>      uint32_t    rsvd12[4];
> @@ -427,6 +466,12 @@ enum NvmeStatusCodes {
>      NVME_CMD_ABORT_MISSING_FUSE = 0x000a,
>      NVME_INVALID_NSID           = 0x000b,
>      NVME_CMD_SEQ_ERROR          = 0x000c,
> 

> +    NVME_INVALID_SGL_SEG_DESCR  = 0x000d,
> +    NVME_INVALID_NUM_SGL_DESCRS = 0x000e,
> +    NVME_DATA_SGL_LEN_INVALID   = 0x000f,
> +    NVME_MD_SGL_LEN_INVALID     = 0x0010,
> +    NVME_SGL_DESCR_TYPE_INVALID = 0x0011,
> +    NVME_INVALID_USE_OF_CMB     = 0x0012,
OK

>      NVME_LBA_RANGE              = 0x0080,
>      NVME_CAP_EXCEEDED           = 0x0081,
>      NVME_NS_NOT_READY           = 0x0082,
> @@ -515,7 +560,7 @@ enum NvmeSmartWarn {
>      NVME_SMART_FAILED_VOLATILE_MEDIA  = 1 << 4,
>  };
>  
> -enum LogIdentifier {
> +enum NvmeLogIdentifier {
>      NVME_LOG_ERROR_INFO     = 0x01,
>      NVME_LOG_SMART_INFO     = 0x02,
>      NVME_LOG_FW_SLOT_INFO   = 0x03,
> @@ -533,6 +578,15 @@ typedef struct NvmePSD {
>      uint8_t     resv[16];
>  } NvmePSD;
>  
> +#define NVME_IDENTIFY_DATA_SIZE 4096
> +
> +enum {
> +    NVME_ID_CNS_NS             = 0x0,
> +    NVME_ID_CNS_CTRL           = 0x1,
> +    NVME_ID_CNS_NS_ACTIVE_LIST = 0x2,
> +    NVME_ID_CNS_NS_DESCR_LIST  = 0x3,
> +};
OK


> +
>  typedef struct NvmeIdCtrl {
>      uint16_t    vid;
>      uint16_t    ssvid;
> @@ -543,7 +597,15 @@ typedef struct NvmeIdCtrl {
>      uint8_t     ieee[3];
>      uint8_t     cmic;
>      uint8_t     mdts;
> -    uint8_t     rsvd255[178];
> +    uint16_t    cntlid;
> +    uint32_t    ver;
> +    uint32_t    rtd3r;
> +    uint32_t    rtd3e;
> +    uint32_t    oaes;
> +    uint32_t    ctratt;
> +    uint8_t     rsvd100[12];
> +    uint8_t     fguid[16];
> +    uint8_t     rsvd128[128];
>      uint16_t    oacs;
>      uint8_t     acl;
>      uint8_t     aerl;
> @@ -551,10 +613,28 @@ typedef struct NvmeIdCtrl {
>      uint8_t     lpa;
>      uint8_t     elpe;
>      uint8_t     npss;
> -    uint8_t     rsvd511[248];
> +    uint8_t     avscc;
> +    uint8_t     apsta;
> +    uint16_t    wctemp;
> +    uint16_t    cctemp;
> +    uint16_t    mtfa;
> +    uint32_t    hmpre;
> +    uint32_t    hmmin;
> +    uint8_t     tnvmcap[16];
> +    uint8_t     unvmcap[16];
> +    uint32_t    rpmbs;
> +    uint16_t    edstt;
> +    uint8_t     dsto;
> +    uint8_t     fwug;
> +    uint16_t    kas;
> +    uint16_t    hctma;
> +    uint16_t    mntmt;
> +    uint16_t    mxtmt;
> +    uint32_t    sanicap;
> +    uint8_t     rsvd332[180];
>      uint8_t     sqes;
>      uint8_t     cqes;
> -    uint16_t    rsvd515;
> +    uint16_t    maxcmd;
>      uint32_t    nn;
>      uint16_t    oncs;
>      uint16_t    fuses;
> @@ -562,8 +642,14 @@ typedef struct NvmeIdCtrl {
>      uint8_t     vwc;
>      uint16_t    awun;
>      uint16_t    awupf;
> -    uint8_t     rsvd703[174];
> -    uint8_t     rsvd2047[1344];
> +    uint8_t     nvscc;
> +    uint8_t     rsvd531;
> +    uint16_t    acwu;
> +    uint8_t     rsvd534[2];
> +    uint32_t    sgls;
> +    uint8_t     rsvd540[228];
> +    uint8_t     subnqn[256];
> +    uint8_t     rsvd1024[1024];
>      NvmePSD     psd[32];
>      uint8_t     vs[1024];
>  } NvmeIdCtrl;
I checked the diff versus V5, cross referenced the spec and it looks correct 
now,
plus you documented even more fields which is welcome.


> @@ -589,6 +675,16 @@ enum NvmeIdCtrlOncs {
>  #define NVME_CTRL_CQES_MIN(cqes) ((cqes) & 0xf)
>  #define NVME_CTRL_CQES_MAX(cqes) (((cqes) >> 4) & 0xf)
>  
> +#define NVME_CTRL_SGLS_SUPPORTED_MASK            (0x3 <<  0)
> +#define NVME_CTRL_SGLS_SUPPORTED_NO_ALIGNMENT    (0x1 <<  0)
> +#define NVME_CTRL_SGLS_SUPPORTED_DWORD_ALIGNMENT (0x1 <<  1)
> +#define NVME_CTRL_SGLS_KEYED                     (0x1 <<  2)
> +#define NVME_CTRL_SGLS_BITBUCKET                 (0x1 << 16)
> +#define NVME_CTRL_SGLS_MPTR_CONTIGUOUS           (0x1 << 17)
> +#define NVME_CTRL_SGLS_EXCESS_LENGTH             (0x1 << 18)
> +#define NVME_CTRL_SGLS_MPTR_SGL                  (0x1 << 19)
> +#define NVME_CTRL_SGLS_ADDR_OFFSET               (0x1 << 20)
OK
> +
>  typedef struct NvmeFeatureVal {
>      uint32_t    arbitration;
>      uint32_t    power_mgmt;
> @@ -611,6 +707,10 @@ typedef struct NvmeFeatureVal {
>  #define NVME_INTC_THR(intc)     (intc & 0xff)
>  #define NVME_INTC_TIME(intc)    ((intc >> 8) & 0xff)
>  
> +#define NVME_TEMP_THSEL(temp)  ((temp >> 20) & 0x3)
Nitpick: If we are adding this, I'll add a #define for the values as well

> +#define NVME_TEMP_TMPSEL(temp) ((temp >> 16) & 0xf)
> +#define NVME_TEMP_TMPTH(temp)  ((temp >>  0) & 0xffff)
> +
>  enum NvmeFeatureIds {
>      NVME_ARBITRATION                = 0x1,
>      NVME_POWER_MANAGEMENT           = 0x2,
> @@ -653,18 +753,37 @@ typedef struct NvmeIdNs {
>      uint8_t     mc;
>      uint8_t     dpc;
>      uint8_t     dps;
> -
>      uint8_t     nmic;
>      uint8_t     rescap;
>      uint8_t     fpi;
>      uint8_t     dlfeat;
> -
> -    uint8_t     res34[94];
> +    uint16_t    nawun;
> +    uint16_t    nawupf;
> +    uint16_t    nacwu;
> +    uint16_t    nabsn;
> +    uint16_t    nabo;
> +    uint16_t    nabspf;
> +    uint16_t    noiob;
> +    uint8_t     nvmcap[16];
> +    uint8_t     rsvd64[40];
> +    uint8_t     nguid[16];
> +    uint64_t    eui64;
>      NvmeLBAF    lbaf[16];
> -    uint8_t     res192[192];
> +    uint8_t     rsvd192[192];
>      uint8_t     vs[3712];
>  } NvmeIdNs;
Also checked this against V5, looks OK now

>  
> +typedef struct NvmeIdNsDescr {
> +    uint8_t nidt;
> +    uint8_t nidl;
> +    uint8_t rsvd2[2];
> +} NvmeIdNsDescr;
OK



> +
> +#define NVME_NIDT_UUID_LEN 16
> +
> +enum {
> +    NVME_NIDT_UUID = 0x3,
Very minor nitpick: I'll would add others as well just for the sake
of better understanding what this is

> +};
>  
>  /*Deallocate Logical Block Features*/
>  #define NVME_ID_NS_DLFEAT_GUARD_CRC(dlfeat)       ((dlfeat) & 0x10)

Looks very good.

Reviewed-by: Maxim Levitsky <address@hidden>

Best regards,
        Maxim Levitsky






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