disk/nvme/nvme_disk.cpp

569 	nvme_io_request nvme_request;
581 			nvme_request.write = operation.IsWrite();
582 			nvme_request.lba_start = operation.Offset() / block_size;
583 			nvme_request.lba_count = operation.Length() / block_size;
584 			nvme_request.iovecs = (physical_entry*)operation.Vecs();
585 			nvme_request.iovec_count = operation.VecCount();
587 			status = do_nvme_io_request(handle->info, &nvme_request);
630 	nvme_io_request nvme_request;
631 	memset(&nvme_request, 0, sizeof(nvme_io_request));
633 	nvme_request.write = request->IsWrite();
654 		nvme_request.iovecs = vtophys = (physical_entry*)malloc(sizeof(physical_entry)
665 			uint32 entries = vtophys_length - nvme_request.iovec_count;
669 				virt.length, vtophys + nvme_request.iovec_count, &entries);
675 				nvme_request.iovecs = vtophys = (physical_entry*)realloc(vtophys,
692 			nvme_request.iovec_count += entries;
695 		nvme_request.iovecs = (physical_entry*)buffer->Vecs();
696 		nvme_request.iovec_count = buffer->VecCount();
702 	for (int32 i = 1; !bounceAll && i < (nvme_request.iovec_count - 1); i++) {
703 		if ((nvme_request.iovecs[i].address % B_PAGE_SIZE) != 0)
705 		if ((nvme_request.iovecs[i].size % B_PAGE_SIZE) != 0)
710 	if (nvme_request.iovec_count > 1) {
714 		physical_entry* entry = &nvme_request.iovecs[0];
719 		entry = &nvme_request.iovecs[nvme_request.iovec_count - 1];
726 		physical_entry* entry = &nvme_request.iovecs[0];
743 	nvme_request.lba_start = rounded_pos / block_size;
744 	nvme_request.lba_count = rounded_len / block_size;
748 	if (nvme_request.write)
759 	int32 remaining = nvme_request.iovec_count;
761 		nvme_request.iovec_count = min_c(remaining,
764 		nvme_request.lba_count = 0;
765 		for (int i = 0; i < nvme_request.iovec_count; i++) {
766 			uint32 new_lba_count = nvme_request.lba_count
767 				+ (nvme_request.iovecs[i].size / block_size);
768 			if (nvme_request.lba_count > 0 && new_lba_count > max_io_blocks) {
771 				nvme_request.iovec_count = i;
775 			nvme_request.lba_count = new_lba_count;
778 		status = do_nvme_io_request(handle->info, &nvme_request);
782 		nvme_request.iovecs += nvme_request.iovec_count;
783 		remaining -= nvme_request.iovec_count;
784 		nvme_request.lba_start += nvme_request.lba_count;
791 		(nvme_request.lba_start * block_size) - rounded_pos);