hw/block/nvme: use preallocated qsg/iov in nvme_dma_prp
Since clean up of the request qsg/iov is now always done post-use, there is no need to use a stack-allocated qsg/iov in nvme_dma_prp. Signed-off-by: Klaus Jensen <k.jensen@samsung.com> Acked-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
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@ -396,50 +396,45 @@ static uint16_t nvme_map_prp(QEMUSGList *qsg, QEMUIOVector *iov, uint64_t prp1,
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}
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static uint16_t nvme_dma_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
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uint64_t prp1, uint64_t prp2, DMADirection dir)
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uint64_t prp1, uint64_t prp2, DMADirection dir,
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NvmeRequest *req)
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{
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QEMUSGList qsg;
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QEMUIOVector iov;
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uint16_t status = NVME_SUCCESS;
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status = nvme_map_prp(&qsg, &iov, prp1, prp2, len, n);
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status = nvme_map_prp(&req->qsg, &req->iov, prp1, prp2, len, n);
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if (status) {
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return status;
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}
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/* assert that only one of qsg and iov carries data */
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assert((qsg.nsg > 0) != (iov.niov > 0));
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assert((req->qsg.nsg > 0) != (req->iov.niov > 0));
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if (qsg.nsg > 0) {
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if (req->qsg.nsg > 0) {
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uint64_t residual;
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if (dir == DMA_DIRECTION_TO_DEVICE) {
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residual = dma_buf_write(ptr, len, &qsg);
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residual = dma_buf_write(ptr, len, &req->qsg);
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} else {
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residual = dma_buf_read(ptr, len, &qsg);
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residual = dma_buf_read(ptr, len, &req->qsg);
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}
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if (unlikely(residual)) {
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trace_pci_nvme_err_invalid_dma();
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status = NVME_INVALID_FIELD | NVME_DNR;
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}
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qemu_sglist_destroy(&qsg);
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} else {
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size_t bytes;
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if (dir == DMA_DIRECTION_TO_DEVICE) {
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bytes = qemu_iovec_to_buf(&iov, 0, ptr, len);
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bytes = qemu_iovec_to_buf(&req->iov, 0, ptr, len);
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} else {
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bytes = qemu_iovec_from_buf(&iov, 0, ptr, len);
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bytes = qemu_iovec_from_buf(&req->iov, 0, ptr, len);
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}
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if (unlikely(bytes != len)) {
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trace_pci_nvme_err_invalid_dma();
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status = NVME_INVALID_FIELD | NVME_DNR;
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}
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qemu_iovec_destroy(&iov);
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}
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return status;
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@ -908,7 +903,7 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
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}
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return nvme_dma_prp(n, (uint8_t *) &smart + off, trans_len, prp1, prp2,
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DMA_DIRECTION_FROM_DEVICE);
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DMA_DIRECTION_FROM_DEVICE, req);
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}
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static uint16_t nvme_fw_log_info(NvmeCtrl *n, uint32_t buf_len, uint64_t off,
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@ -931,7 +926,7 @@ static uint16_t nvme_fw_log_info(NvmeCtrl *n, uint32_t buf_len, uint64_t off,
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trans_len = MIN(sizeof(fw_log) - off, buf_len);
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return nvme_dma_prp(n, (uint8_t *) &fw_log + off, trans_len, prp1, prp2,
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DMA_DIRECTION_FROM_DEVICE);
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DMA_DIRECTION_FROM_DEVICE, req);
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}
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static uint16_t nvme_error_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
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@ -956,7 +951,7 @@ static uint16_t nvme_error_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
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trans_len = MIN(sizeof(errlog) - off, buf_len);
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return nvme_dma_prp(n, (uint8_t *)&errlog, trans_len, prp1, prp2,
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DMA_DIRECTION_FROM_DEVICE);
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DMA_DIRECTION_FROM_DEVICE, req);
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}
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static uint16_t nvme_get_log(NvmeCtrl *n, NvmeRequest *req)
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@ -1122,7 +1117,7 @@ static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeRequest *req)
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trace_pci_nvme_identify_ctrl();
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return nvme_dma_prp(n, (uint8_t *)&n->id_ctrl, sizeof(n->id_ctrl), prp1,
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prp2, DMA_DIRECTION_FROM_DEVICE);
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prp2, DMA_DIRECTION_FROM_DEVICE, req);
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}
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static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req)
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@ -1143,7 +1138,7 @@ static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req)
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ns = &n->namespaces[nsid - 1];
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return nvme_dma_prp(n, (uint8_t *)&ns->id_ns, sizeof(ns->id_ns), prp1,
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prp2, DMA_DIRECTION_FROM_DEVICE);
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prp2, DMA_DIRECTION_FROM_DEVICE, req);
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}
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static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeRequest *req)
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@ -1180,7 +1175,7 @@ static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeRequest *req)
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}
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}
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ret = nvme_dma_prp(n, (uint8_t *)list, data_len, prp1, prp2,
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DMA_DIRECTION_FROM_DEVICE);
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DMA_DIRECTION_FROM_DEVICE, req);
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g_free(list);
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return ret;
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}
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@ -1223,7 +1218,7 @@ static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeRequest *req)
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stl_be_p(&ns_descrs->uuid.v, nsid);
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return nvme_dma_prp(n, list, NVME_IDENTIFY_DATA_SIZE, prp1, prp2,
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DMA_DIRECTION_FROM_DEVICE);
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DMA_DIRECTION_FROM_DEVICE, req);
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}
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static uint16_t nvme_identify(NvmeCtrl *n, NvmeRequest *req)
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@ -1306,7 +1301,7 @@ static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
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uint64_t timestamp = nvme_get_timestamp(n);
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return nvme_dma_prp(n, (uint8_t *)×tamp, sizeof(timestamp), prp1,
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prp2, DMA_DIRECTION_FROM_DEVICE);
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prp2, DMA_DIRECTION_FROM_DEVICE, req);
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}
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static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeRequest *req)
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@ -1440,7 +1435,7 @@ static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
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uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
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ret = nvme_dma_prp(n, (uint8_t *)×tamp, sizeof(timestamp), prp1,
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prp2, DMA_DIRECTION_TO_DEVICE);
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prp2, DMA_DIRECTION_TO_DEVICE, req);
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if (ret != NVME_SUCCESS) {
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return ret;
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}
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