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Re: [PATCH v2 15/20] nvme: add support for scatter gather lists
|
From: |
Beata Michalska |
|
Subject: |
Re: [PATCH v2 15/20] nvme: add support for scatter gather lists |
|
Date: |
Tue, 12 Nov 2019 15:25:18 +0000 |
Hi Klaus,
On Tue, 15 Oct 2019 at 11:57, Klaus Jensen <address@hidden> wrote:
>
> For now, support the Data Block, Segment and Last Segment descriptor
> types.
>
> See NVM Express 1.3d, Section 4.4 ("Scatter Gather List (SGL)").
>
> Signed-off-by: Klaus Jensen <address@hidden>
> ---
> block/nvme.c | 18 +-
> hw/block/nvme.c | 380 ++++++++++++++++++++++++++++++++++++------
> hw/block/trace-events | 3 +
> include/block/nvme.h | 62 ++++++-
> 4 files changed, 398 insertions(+), 65 deletions(-)
>
> diff --git a/block/nvme.c b/block/nvme.c
> index 5be3a39b632e..8825c19c72c2 100644
> --- a/block/nvme.c
> +++ b/block/nvme.c
> @@ -440,7 +440,7 @@ 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.prp.prp1 = cpu_to_le64(iova);
>
> if (nvme_cmd_sync(bs, s->queues[0], &cmd)) {
> error_setg(errp, "Failed to identify controller");
> @@ -529,7 +529,7 @@ 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.prp.prp1 = cpu_to_le64(q->cq.iova),
> .cdw10 = cpu_to_le32(((queue_size - 1) << 16) | (n & 0xFFFF)),
> .cdw11 = cpu_to_le32(0x3),
> };
> @@ -540,7 +540,7 @@ 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.prp.prp1 = cpu_to_le64(q->sq.iova),
> .cdw10 = cpu_to_le32(((queue_size - 1) << 16) | (n & 0xFFFF)),
> .cdw11 = cpu_to_le32(0x1 | (n << 16)),
> };
> @@ -889,16 +889,16 @@ try_map:
> case 0:
> abort();
> case 1:
> - cmd->prp1 = pagelist[0];
> - cmd->prp2 = 0;
> + cmd->dptr.prp.prp1 = pagelist[0];
> + cmd->dptr.prp.prp2 = 0;
> break;
> case 2:
> - cmd->prp1 = pagelist[0];
> - cmd->prp2 = pagelist[1];
> + cmd->dptr.prp.prp1 = pagelist[0];
> + cmd->dptr.prp.prp2 = pagelist[1];
> break;
> default:
> - cmd->prp1 = pagelist[0];
> - cmd->prp2 = cpu_to_le64(req->prp_list_iova + sizeof(uint64_t));
> + cmd->dptr.prp.prp1 = pagelist[0];
> + cmd->dptr.prp.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 f4b9bd36a04e..0a5cd079df9a 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -296,6 +296,198 @@ unmap:
> return status;
> }
>
> +static uint16_t nvme_map_sgl_data(NvmeCtrl *n, QEMUSGList *qsg,
> + NvmeSglDescriptor *segment, uint64_t nsgld, uint32_t *len,
> + NvmeRequest *req)
> +{
> + dma_addr_t addr, trans_len;
> +
> + for (int i = 0; i < nsgld; i++) {
> + if (NVME_SGL_TYPE(segment[i].type) != SGL_DESCR_TYPE_DATA_BLOCK) {
> + trace_nvme_err_invalid_sgl_descriptor(req->cid,
> + NVME_SGL_TYPE(segment[i].type));
> + return NVME_SGL_DESCRIPTOR_TYPE_INVALID | NVME_DNR;
> + }
> +
> + if (*len == 0) {
> + if (!NVME_CTRL_SGLS_EXCESS_LENGTH(n->id_ctrl.sgls)) {
> + trace_nvme_err_invalid_sgl_excess_length(req->cid);
> + return NVME_DATA_SGL_LENGTH_INVALID | NVME_DNR;
> + }
> +
> + break;
> + }
> +
> + addr = le64_to_cpu(segment[i].addr);
> + trans_len = MIN(*len, le64_to_cpu(segment[i].len));
> +
> + if (nvme_addr_is_cmb(n, addr)) {
> + /*
> + * All data and metadata, if any, associated with a particular
> + * command shall be located in either the CMB or host memory.
> Thus,
> + * if an address if found to be in the CMB and we have already
> + * mapped data that is in host memory, the use is invalid.
> + */
> + if (!nvme_req_is_cmb(req) && qsg->size) {
> + return NVME_INVALID_USE_OF_CMB | NVME_DNR;
> + }
> +
> + nvme_req_set_cmb(req);
> + } else {
> + /*
> + * Similarly, if the address does not reference the CMB, but we
> + * have already established that the request has data or metadata
> + * in the CMB, the use is invalid.
> + */
> + if (nvme_req_is_cmb(req)) {
> + return NVME_INVALID_USE_OF_CMB | NVME_DNR;
> + }
> + }
> +
> + qemu_sglist_add(qsg, addr, trans_len);
> +
> + *len -= trans_len;
> + }
> +
> + return NVME_SUCCESS;
> +}
> +
> +static uint16_t nvme_map_sgl(NvmeCtrl *n, QEMUSGList *qsg,
> + NvmeSglDescriptor sgl, uint32_t len, NvmeRequest *req)
> +{
> + const int MAX_NSGLD = 256;
> +
> + NvmeSglDescriptor segment[MAX_NSGLD];
> + uint64_t nsgld;
> + uint16_t status;
> + bool sgl_in_cmb = false;
> + hwaddr addr = le64_to_cpu(sgl.addr);
> +
> + trace_nvme_map_sgl(req->cid, NVME_SGL_TYPE(sgl.type), req->nlb, len);
> +
> + pci_dma_sglist_init(qsg, &n->parent_obj, 1);
> +
> + /*
> + * If the entire transfer can be described with a single data block it
> can
> + * be mapped directly.
> + */
> + if (NVME_SGL_TYPE(sgl.type) == SGL_DESCR_TYPE_DATA_BLOCK) {
> + status = nvme_map_sgl_data(n, qsg, &sgl, 1, &len, req);
> + if (status) {
> + goto unmap;
> + }
> +
> + goto out;
> + }
> +
> + /*
> + * If the segment is located in the CMB, the submission queue of the
> + * request must also reside there.
> + */
> + if (nvme_addr_is_cmb(n, addr)) {
> + if (!nvme_addr_is_cmb(n, req->sq->dma_addr)) {
> + return NVME_INVALID_USE_OF_CMB | NVME_DNR;
> + }
> +
> + sgl_in_cmb = true;
> + }
> +
> + while (NVME_SGL_TYPE(sgl.type) == SGL_DESCR_TYPE_SEGMENT) {
> + bool addr_is_cmb;
> +
> + nsgld = le64_to_cpu(sgl.len) / sizeof(NvmeSglDescriptor);
> +
> + /* read the segment in chunks of 256 descriptors (4k) */
> + while (nsgld > MAX_NSGLD) {
> + nvme_addr_read(n, addr, segment, sizeof(segment));
Is there any chance this will go outside the CMB?
> +
> + status = nvme_map_sgl_data(n, qsg, segment, MAX_NSGLD, &len,
> req);
> + if (status) {
> + goto unmap;
> + }
> +
> + nsgld -= MAX_NSGLD;
> + addr += MAX_NSGLD * sizeof(NvmeSglDescriptor);
> + }
> +
> + nvme_addr_read(n, addr, segment, nsgld * sizeof(NvmeSglDescriptor));
> +
> + sgl = segment[nsgld - 1];
> + addr = le64_to_cpu(sgl.addr);
> +
> + /* an SGL is allowed to end with a Data Block in a regular Segment */
> + if (NVME_SGL_TYPE(sgl.type) == SGL_DESCR_TYPE_DATA_BLOCK) {
> + status = nvme_map_sgl_data(n, qsg, segment, nsgld, &len, req);
> + if (status) {
> + goto unmap;
> + }
> +
> + goto out;
> + }
> +
> + /* do not map last descriptor */
> + status = nvme_map_sgl_data(n, qsg, segment, nsgld - 1, &len, req);
> + if (status) {
> + goto unmap;
> + }
> +
> + /*
> + * If the next segment is in the CMB, make sure that the sgl was
> + * already located there.
> + */
> + addr_is_cmb = nvme_addr_is_cmb(n, addr);
> + if ((sgl_in_cmb && !addr_is_cmb) || (!sgl_in_cmb && addr_is_cmb)) {
> + status = NVME_INVALID_USE_OF_CMB | NVME_DNR;
> + goto unmap;
> + }
> + }
> +
> + /*
> + * If the segment did not end with a Data Block or a Segment descriptor,
> it
> + * must be a Last Segment descriptor.
> + */
> + if (NVME_SGL_TYPE(sgl.type) != SGL_DESCR_TYPE_LAST_SEGMENT) {
> + trace_nvme_err_invalid_sgl_descriptor(req->cid,
> + NVME_SGL_TYPE(sgl.type));
> + return NVME_SGL_DESCRIPTOR_TYPE_INVALID | NVME_DNR;
Shouldn't we handle a case here that requires calling unmap ?
> + }
> +
> + nsgld = le64_to_cpu(sgl.len) / sizeof(NvmeSglDescriptor);
> +
> + while (nsgld > MAX_NSGLD) {
> + nvme_addr_read(n, addr, segment, sizeof(segment));
> +
> + status = nvme_map_sgl_data(n, qsg, segment, MAX_NSGLD, &len, req);
> + if (status) {
> + goto unmap;
> + }
> +
> + nsgld -= MAX_NSGLD;
> + addr += MAX_NSGLD * sizeof(NvmeSglDescriptor);
> + }
> +
> + nvme_addr_read(n, addr, segment, nsgld * sizeof(NvmeSglDescriptor));
> +
> + status = nvme_map_sgl_data(n, qsg, segment, nsgld, &len, req);
> + if (status) {
> + goto unmap;
> + }
> +
> +out:
> + /* if there is any residual left in len, the SGL was too short */
> + if (len) {
> + status = NVME_DATA_SGL_LENGTH_INVALID | NVME_DNR;
> + goto unmap;
> + }
> +
> + return NVME_SUCCESS;
> +
> +unmap:
> + qemu_sglist_destroy(qsg);
> +
> + return status;
> +}
> +
> static void dma_to_cmb(NvmeCtrl *n, QEMUSGList *qsg, QEMUIOVector *iov)
> {
> for (int i = 0; i < qsg->nsg; i++) {
> @@ -341,6 +533,56 @@ static uint16_t nvme_dma_write_prp(NvmeCtrl *n, uint8_t
> *ptr, uint32_t len,
> return status;
> }
>
> +static uint16_t nvme_dma_write_sgl(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
> + NvmeSglDescriptor sgl, NvmeRequest *req)
> +{
> + QEMUSGList qsg;
> + uint16_t err = NVME_SUCCESS;
> +
> + err = nvme_map_sgl(n, &qsg, sgl, len, req);
> + if (err) {
> + return err;
> + }
> +
> + if (nvme_req_is_cmb(req)) {
> + QEMUIOVector iov;
> +
> + qemu_iovec_init(&iov, qsg.nsg);
> + dma_to_cmb(n, &qsg, &iov);
> +
> + if (unlikely(qemu_iovec_to_buf(&iov, 0, ptr, len) != len)) {
> + trace_nvme_err_invalid_dma();
> + err = NVME_INVALID_FIELD | NVME_DNR;
> + }
> +
> + qemu_iovec_destroy(&iov);
> +
> + return err;
> + }
> +
> + if (unlikely(dma_buf_write(ptr, len, &qsg))) {
> + trace_nvme_err_invalid_dma();
> + err = NVME_INVALID_FIELD | NVME_DNR;
> + }
> +
> + qemu_sglist_destroy(&qsg);
> +
> + return err;
> +}
> +
> +static uint16_t nvme_dma_write(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
> + NvmeCmd *cmd, NvmeRequest *req)
> +{
> + if (NVME_CMD_FLAGS_PSDT(cmd->flags)) {
> + return nvme_dma_write_sgl(n, ptr, len, cmd->dptr.sgl, req);
> + }
> +
> + uint64_t prp1 = le64_to_cpu(cmd->dptr.prp.prp1);
> + uint64_t prp2 = le64_to_cpu(cmd->dptr.prp.prp2);
> +
> + return nvme_dma_write_prp(n, ptr, len, prp1, prp2, req);
> +}
> +
> static uint16_t nvme_dma_read_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
> uint64_t prp1, uint64_t prp2, NvmeRequest *req)
> {
> @@ -378,13 +620,68 @@ out:
> return status;
> }
>
> +static uint16_t nvme_dma_read_sgl(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
> + NvmeSglDescriptor sgl, NvmeCmd *cmd, NvmeRequest *req)
> +{
> + QEMUSGList qsg;
> + uint16_t err = NVME_SUCCESS;
> +
Very minor: Mixing convention: status vs error
> + err = nvme_map_sgl(n, &qsg, sgl, len, req);
> + if (err) {
> + return err;
> + }
> +
> + if (nvme_req_is_cmb(req)) {
> + QEMUIOVector iov;
> +
> + qemu_iovec_init(&iov, qsg.nsg);
> + dma_to_cmb(n, &qsg, &iov);
> +
> + if (unlikely(qemu_iovec_from_buf(&iov, 0, ptr, len) != len)) {
> + trace_nvme_err_invalid_dma();
> + err = NVME_INVALID_FIELD | NVME_DNR;
> + }
> +
> + qemu_iovec_destroy(&iov);
> +
> + goto out;
> + }
> +
> + if (unlikely(dma_buf_read(ptr, len, &qsg))) {
> + trace_nvme_err_invalid_dma();
> + err = NVME_INVALID_FIELD | NVME_DNR;
> + }
> +
> +out:
> + qemu_sglist_destroy(&qsg);
> +
> + return err;
> +}
> +
> +static uint16_t nvme_dma_read(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
> + NvmeCmd *cmd, NvmeRequest *req)
> +{
> + if (NVME_CMD_FLAGS_PSDT(cmd->flags)) {
> + return nvme_dma_read_sgl(n, ptr, len, cmd->dptr.sgl, cmd, req);
> + }
> +
> + uint64_t prp1 = le64_to_cpu(cmd->dptr.prp.prp1);
> + uint64_t prp2 = le64_to_cpu(cmd->dptr.prp.prp2);
> +
> + return nvme_dma_read_prp(n, ptr, len, prp1, prp2, req);
> +}
> +
> static uint16_t nvme_map(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> {
> - NvmeNamespace *ns = req->ns;
> + uint32_t len = req->nlb << nvme_ns_lbads(req->ns);
> + uint64_t prp1, prp2;
> +
> + if (NVME_CMD_FLAGS_PSDT(cmd->flags)) {
> + return nvme_map_sgl(n, &req->qsg, cmd->dptr.sgl, len, req);
> + }
>
> - uint32_t len = req->nlb << nvme_ns_lbads(ns);
> - uint64_t prp1 = le64_to_cpu(cmd->prp1);
> - uint64_t prp2 = le64_to_cpu(cmd->prp2);
> + prp1 = le64_to_cpu(cmd->dptr.prp.prp1);
> + prp2 = le64_to_cpu(cmd->dptr.prp.prp2);
>
> return nvme_map_prp(n, &req->qsg, prp1, prp2, len, req);
> }
> @@ -975,8 +1272,6 @@ static uint16_t nvme_error_info(NvmeCtrl *n, NvmeCmd
> *cmd, uint8_t rae,
> uint32_t buf_len, uint64_t off, NvmeRequest *req)
> {
> uint32_t trans_len;
> - uint64_t prp1 = le64_to_cpu(cmd->prp1);
> - uint64_t prp2 = le64_to_cpu(cmd->prp2);
>
> if (off > sizeof(*n->elpes) * (n->params.elpe + 1)) {
> return NVME_INVALID_FIELD | NVME_DNR;
> @@ -988,15 +1283,12 @@ static uint16_t nvme_error_info(NvmeCtrl *n, NvmeCmd
> *cmd, uint8_t rae,
> nvme_clear_events(n, NVME_AER_TYPE_ERROR);
> }
>
> - return nvme_dma_read_prp(n, (uint8_t *) n->elpes + off, trans_len, prp1,
> - prp2, req);
> + return nvme_dma_read(n, (uint8_t *) n->elpes + off, trans_len, cmd, req);
> }
>
> static uint16_t nvme_smart_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
> uint32_t buf_len, uint64_t off, NvmeRequest *req)
> {
> - uint64_t prp1 = le64_to_cpu(cmd->prp1);
> - uint64_t prp2 = le64_to_cpu(cmd->prp2);
> uint32_t nsid = le32_to_cpu(cmd->nsid);
>
> uint32_t trans_len;
> @@ -1047,16 +1339,13 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, NvmeCmd
> *cmd, uint8_t rae,
> nvme_clear_events(n, NVME_AER_TYPE_SMART);
> }
>
> - return nvme_dma_read_prp(n, (uint8_t *) &smart + off, trans_len, prp1,
> - prp2, req);
> + return nvme_dma_read(n, (uint8_t *) &smart + off, trans_len, cmd, req);
> }
>
> static uint16_t nvme_fw_log_info(NvmeCtrl *n, NvmeCmd *cmd, uint32_t buf_len,
> uint64_t off, NvmeRequest *req)
> {
> uint32_t trans_len;
> - uint64_t prp1 = le64_to_cpu(cmd->prp1);
> - uint64_t prp2 = le64_to_cpu(cmd->prp2);
> NvmeFwSlotInfoLog fw_log;
>
> if (off > sizeof(fw_log)) {
> @@ -1067,8 +1356,7 @@ static uint16_t nvme_fw_log_info(NvmeCtrl *n, NvmeCmd
> *cmd, uint32_t buf_len,
>
> trans_len = MIN(sizeof(fw_log) - off, buf_len);
>
> - return nvme_dma_read_prp(n, (uint8_t *) &fw_log + off, trans_len, prp1,
> - prp2, req);
> + return nvme_dma_read(n, (uint8_t *) &fw_log + off, trans_len, cmd, req);
> }
>
> static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> @@ -1210,25 +1498,18 @@ static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd
> *cmd)
> return NVME_SUCCESS;
> }
>
> -static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeIdentify *c,
> - NvmeRequest *req)
> +static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest
> *req)
> {
> - uint64_t prp1 = le64_to_cpu(c->prp1);
> - uint64_t prp2 = le64_to_cpu(c->prp2);
> -
> trace_nvme_identify_ctrl();
>
> - return nvme_dma_read_prp(n, (uint8_t *)&n->id_ctrl, sizeof(n->id_ctrl),
> - prp1, prp2, req);
> + return nvme_dma_read(n, (uint8_t *) &n->id_ctrl, sizeof(n->id_ctrl), cmd,
> + req);
> }
>
> -static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeIdentify *c,
> - NvmeRequest *req)
> +static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> {
> NvmeNamespace *ns;
> - uint32_t nsid = le32_to_cpu(c->nsid);
> - uint64_t prp1 = le64_to_cpu(c->prp1);
> - uint64_t prp2 = le64_to_cpu(c->prp2);
> + uint32_t nsid = le32_to_cpu(cmd->nsid);
>
> trace_nvme_identify_ns(nsid);
>
> @@ -1239,17 +1520,15 @@ static uint16_t nvme_identify_ns(NvmeCtrl *n,
> NvmeIdentify *c,
>
> ns = &n->namespaces[nsid - 1];
>
> - return nvme_dma_read_prp(n, (uint8_t *)&ns->id_ns, sizeof(ns->id_ns),
> - prp1, prp2, req);
> + return nvme_dma_read(n, (uint8_t *) &ns->id_ns, sizeof(ns->id_ns), cmd,
> + req);
> }
>
> -static uint16_t nvme_identify_ns_list(NvmeCtrl *n, NvmeIdentify *c,
> +static uint16_t nvme_identify_ns_list(NvmeCtrl *n, NvmeCmd *cmd,
> NvmeRequest *req)
> {
> static const int data_len = 4 * KiB;
> - uint32_t min_nsid = le32_to_cpu(c->nsid);
> - uint64_t prp1 = le64_to_cpu(c->prp1);
> - uint64_t prp2 = le64_to_cpu(c->prp2);
> + uint32_t min_nsid = le32_to_cpu(cmd->nsid);
> uint32_t *list;
> uint16_t ret;
> int i, j = 0;
> @@ -1266,12 +1545,12 @@ static uint16_t nvme_identify_ns_list(NvmeCtrl *n,
> NvmeIdentify *c,
> break;
> }
> }
> - ret = nvme_dma_read_prp(n, (uint8_t *)list, data_len, prp1, prp2, req);
> + ret = nvme_dma_read(n, (uint8_t *) list, data_len, cmd, req);
> g_free(list);
> return ret;
> }
>
> -static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeIdentify *c,
> +static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeCmd *cmd,
> NvmeRequest *req)
> {
> static const int len = 4096;
> @@ -1283,9 +1562,7 @@ static uint16_t nvme_identify_ns_descr_list(NvmeCtrl
> *n, NvmeIdentify *c,
> uint8_t nid[16];
> };
>
> - uint32_t nsid = le32_to_cpu(c->nsid);
> - uint64_t prp1 = le64_to_cpu(c->prp1);
> - uint64_t prp2 = le64_to_cpu(c->prp2);
> + uint32_t nsid = le32_to_cpu(cmd->nsid);
>
> struct ns_descr *list;
> uint16_t ret;
> @@ -1302,7 +1579,7 @@ static uint16_t nvme_identify_ns_descr_list(NvmeCtrl
> *n, NvmeIdentify *c,
> list->nidl = 0x10;
> *(uint32_t *) &list->nid[12] = cpu_to_be32(nsid);
>
> - ret = nvme_dma_read_prp(n, (uint8_t *) list, len, prp1, prp2, req);
> + ret = nvme_dma_read(n, (uint8_t *) list, len, cmd, req);
> g_free(list);
> return ret;
> }
> @@ -1313,13 +1590,13 @@ static uint16_t nvme_identify(NvmeCtrl *n, NvmeCmd
> *cmd, NvmeRequest *req)
>
> switch (le32_to_cpu(c->cns)) {
> case 0x00:
> - return nvme_identify_ns(n, c, req);
> + return nvme_identify_ns(n, cmd, req);
> case 0x01:
> - return nvme_identify_ctrl(n, c, req);
> + return nvme_identify_ctrl(n, cmd, req);
> case 0x02:
> - return nvme_identify_ns_list(n, c, req);
> + return nvme_identify_ns_list(n, cmd, req);
> case 0x03:
> - return nvme_identify_ns_descr_list(n, c, req);
> + return nvme_identify_ns_descr_list(n, cmd, req);
> default:
> trace_nvme_err_invalid_identify_cns(le32_to_cpu(c->cns));
> return NVME_INVALID_FIELD | NVME_DNR;
> @@ -1381,13 +1658,10 @@ static inline uint64_t nvme_get_timestamp(const
> NvmeCtrl *n)
> static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd,
> NvmeRequest *req)
> {
> - uint64_t prp1 = le64_to_cpu(cmd->prp1);
> - uint64_t prp2 = le64_to_cpu(cmd->prp2);
> -
> uint64_t timestamp = nvme_get_timestamp(n);
>
> - return nvme_dma_read_prp(n, (uint8_t *)×tamp, sizeof(timestamp),
> - prp1, prp2, req);
> + return nvme_dma_read(n, (uint8_t *)×tamp, sizeof(timestamp), cmd,
> + req);
> }
>
> static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> @@ -1452,11 +1726,9 @@ 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);
>
> - ret = nvme_dma_write_prp(n, (uint8_t *)×tamp,
> - sizeof(timestamp), prp1, prp2, req);
> + ret = nvme_dma_write(n, (uint8_t *)×tamp, sizeof(timestamp), cmd,
> + req);
> if (ret != NVME_SUCCESS) {
> return ret;
> }
> @@ -2241,6 +2513,8 @@ static void nvme_init_ctrl(NvmeCtrl *n)
> id->vwc = 1;
> }
>
> + id->sgls = cpu_to_le32(0x1);
> +
> strcpy((char *) id->subnqn, "nqn.2019-08.org.qemu:");
> pstrcat((char *) id->subnqn, sizeof(id->subnqn), n->params.serial);
>
> diff --git a/hw/block/trace-events b/hw/block/trace-events
> index c7e0a1849043..59d42a3b8c39 100644
> --- a/hw/block/trace-events
> +++ b/hw/block/trace-events
> @@ -34,6 +34,7 @@ nvme_irq_pin(void) "pulsing IRQ pin"
> nvme_irq_masked(void) "IRQ is masked"
> nvme_dma_read(uint64_t prp1, uint64_t prp2) "DMA read, prp1=0x%"PRIx64"
> prp2=0x%"PRIx64""
> nvme_map_prp(uint16_t cid, uint8_t opc, uint64_t trans_len, uint32_t len,
> uint64_t prp1, uint64_t prp2, int num_prps) "cid %"PRIu16" opc 0x%"PRIx8"
> trans_len %"PRIu64" len %"PRIu32" prp1 0x%"PRIx64" prp2 0x%"PRIx64" num_prps
> %d"
> +nvme_map_sgl(uint16_t cid, uint8_t typ, uint32_t nlb, uint64_t len) "cid
> %"PRIu16" type 0x%"PRIx8" nlb %"PRIu32" len %"PRIu64""
> nvme_req_register_aio(uint16_t cid, void *aio, const char *blkname, uint64_t
> offset, uint64_t count, const char *opc, void *req) "cid %"PRIu16" aio %p blk
> \"%s\" offset %"PRIu64" count %"PRIu64" opc \"%s\" req %p"
> nvme_aio_cb(uint16_t cid, void *aio, const char *blkname, uint64_t offset,
> const char *opc, void *req) "cid %"PRIu16" aio %p blk \"%s\" offset %"PRIu64"
> opc \"%s\" req %p"
> nvme_io_cmd(uint16_t cid, uint32_t nsid, uint16_t sqid, uint8_t opcode) "cid
> %"PRIu16" nsid %"PRIu32" sqid %"PRIu16" opc 0x%"PRIx8""
> @@ -82,6 +83,8 @@ nvme_mmio_shutdown_cleared(void) "shutdown bit cleared"
> nvme_err_mdts(uint16_t cid, size_t mdts, size_t len) "cid %"PRIu16" mdts
> %"PRIu64" len %"PRIu64""
> nvme_err_prinfo(uint16_t cid, uint16_t ctrl) "cid %"PRIu16" ctrl %"PRIu16""
> nvme_err_aio(uint16_t cid, void *aio, const char *blkname, uint64_t offset,
> const char *opc, void *req, uint16_t status) "cid %"PRIu16" aio %p blk \"%s\"
> offset %"PRIu64" opc \"%s\" req %p status 0x%"PRIx16""
> +nvme_err_invalid_sgl_descriptor(uint16_t cid, uint8_t typ) "cid %"PRIu16"
> type 0x%"PRIx8""
> +nvme_err_invalid_sgl_excess_length(uint16_t cid) "cid %"PRIu16""
> nvme_err_invalid_dma(void) "PRP/SGL is too small for transfer size"
> nvme_err_invalid_prplist_ent(uint64_t prplist) "PRP list entry is null or
> not page aligned: 0x%"PRIx64""
> nvme_err_invalid_prp2_align(uint64_t prp2) "PRP2 is not page aligned:
> 0x%"PRIx64""
> diff --git a/include/block/nvme.h b/include/block/nvme.h
> index d4990db4fdf8..ba0a9d4e328f 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 {
> + SGL_DESCR_TYPE_DATA_BLOCK = 0x0,
> + SGL_DESCR_TYPE_BIT_BUCKET = 0x1,
> + SGL_DESCR_TYPE_SEGMENT = 0x2,
> + SGL_DESCR_TYPE_LAST_SEGMENT = 0x3,
> + SGL_DESCR_TYPE_KEYED_DATA_BLOCK = 0x4,
> +
> + SGL_DESCR_TYPE_VENDOR_SPECIFIC = 0xf,
> +};
> +
> +enum NvmeSglDescriptorSubtype {
> + SGL_DESCR_SUBTYPE_ADDRESS = 0x0,
> + SGL_DESCR_SUBTYPE_OFFSET = 0x1,
> +};
> +
> +typedef struct NvmeSglDescriptor {
> + uint64_t addr;
> + uint32_t len;
> + uint8_t rsvd[3];
> + uint8_t type;
> +} NvmeSglDescriptor;
> +
> +#define NVME_SGL_TYPE(type) (type >> 4)
> +
> +typedef union NvmeCmdDptr {
> + struct {
> + uint64_t prp1;
> + uint64_t prp2;
> + } prp;
> +
> + NvmeSglDescriptor sgl;
> +} NvmeCmdDptr;
> +
> +enum NvmePsdt {
> + PSDT_PRP = 0x0,
> + PSDT_SGL_MPTR_CONTIGUOUS = 0x1,
> + PSDT_SGL_MPTR_SGL = 0x2,
> +};
> +
> typedef struct NvmeCmd {
> uint8_t opcode;
> - uint8_t fuse;
> + uint8_t flags;
> 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)
Minor: This one is slightly misleading - as per the naming and it's usage:
the PSDT is a field name and as such does not imply using SGLs
and it is being used to verify if given command is actually using
SGLs.
BR
Beata
> +
> enum NvmeAdminCommands {
> NVME_ADM_CMD_DELETE_SQ = 0x00,
> NVME_ADM_CMD_CREATE_SQ = 0x01,
> @@ -427,6 +468,11 @@ enum NvmeStatusCodes {
> NVME_CMD_ABORT_MISSING_FUSE = 0x000a,
> NVME_INVALID_NSID = 0x000b,
> NVME_CMD_SEQ_ERROR = 0x000c,
> + NVME_INVALID_SGL_SEG_DESCRIPTOR = 0x000d,
> + NVME_INVALID_NUM_SGL_DESCRIPTORS = 0x000e,
> + NVME_DATA_SGL_LENGTH_INVALID = 0x000f,
> + NVME_METADATA_SGL_LENGTH_INVALID = 0x0010,
> + NVME_SGL_DESCRIPTOR_TYPE_INVALID = 0x0011,
> NVME_INVALID_USE_OF_CMB = 0x0012,
> NVME_LBA_RANGE = 0x0080,
> NVME_CAP_EXCEEDED = 0x0081,
> @@ -623,6 +669,16 @@ enum NvmeIdCtrlOncs {
> #define NVME_CTRL_CQES_MIN(cqes) ((cqes) & 0xf)
> #define NVME_CTRL_CQES_MAX(cqes) (((cqes) >> 4) & 0xf)
>
> +#define NVME_CTRL_SGLS_SUPPORTED(sgls) ((sgls) & 0x3)
> +#define NVME_CTRL_SGLS_SUPPORTED_NO_ALIGNMENT(sgls) ((sgls) & (0x1 << 0))
> +#define NVME_CTRL_SGLS_SUPPORTED_DWORD_ALIGNMENT(sgls) ((sgls) & (0x1 << 1))
> +#define NVME_CTRL_SGLS_KEYED(sgls) ((sgls) & (0x1 << 2))
> +#define NVME_CTRL_SGLS_BITBUCKET(sgls) ((sgls) & (0x1 << 16))
> +#define NVME_CTRL_SGLS_MPTR_CONTIGUOUS(sgls) ((sgls) & (0x1 << 17))
> +#define NVME_CTRL_SGLS_EXCESS_LENGTH(sgls) ((sgls) & (0x1 << 18))
> +#define NVME_CTRL_SGLS_MPTR_SGL(sgls) ((sgls) & (0x1 << 19))
> +#define NVME_CTRL_SGLS_ADDR_OFFSET(sgls) ((sgls) & (0x1 << 20))
> +
> typedef struct NvmeFeatureVal {
> uint32_t arbitration;
> uint32_t power_mgmt;
> --
> 2.23.0
>
>
- Re: [PATCH v2 15/20] nvme: add support for scatter gather lists,
Beata Michalska <=