在底层,它利用了DMA(Direct Memory Access)和Scatter-Gather(SG)技术,以实现高效的数据传输。DMA允许设备直接访问内存,无需CPU干预,而Scatter-Gather则允许数据分散存储在多个非连续的内存块中,进一步提高了数据传输的灵活性和效率。 主要特点 高效数据传输:通过DMA和Scatter-Gather技术,实现快速、高效的数据传输。 直接...
s->dma_address = sg_phys(s) + p2p_pgmap->bus_offset;sg_dma_len(s) = s->length; }return nents; }/** * pci_p2pdma_map_sg_attrs - map a PCI peer-to-peer scatterlist for DMA * @dev: device doing the DMA request * @sg: scatter list to map * @nents: elements in th...
XAxiDma_BdSetLength(tx_bd_ptr, length, tx_ring->MaxTransferLen); XAxiDma_BdSetId(tx_bd_ptr, (u32)buffer); XAxiDma_BdSetCtrl(tx_bd_ptr, (XAxiDma_BdGetCtrl(tx_bd_ptr) | XAXIDMA_BD_CTRL_TXSOF_MASK | XAXIDMA_BD_CTRL_TXEOF_MASK)); tx_ctrl = XAXIDMA_BD_CTRL_TXSOF_MASK...
case NVKM_FIRMWARE_IMG_DMA: nvkm_memory_unref(&memory);dma_unmap_single(fw->device->dev, fw->phys, sg_dma_len(&fw->mem.sgl), DMA_TO_DEVICE);kfree(fw->img);dma_free_coherent(fw->device->dev, sg_dma_len(&fw->mem.sgl), fw->img, fw->phys); ...
+ d->sg[i].fn = sg_dma_len(sgent) / frame_bytes; } - d->sglen = j; + d->sglen = sglen; return vchan_tx_prep(&c->vc, &d->vd, tx_flags); } -- 2.6.2 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in ...
.pbl = DMA_BURST_LEN, .has_gmac = 1, .enh_desc = 1, #ifdef TNK_HW_PLATFORM_FPGA .clk_csr = 0x2, /* For 24Mhz bus clock input */ #else .clk_csr = 0x4, /* For 155Mhz bus clock input */ #endif }; 四、驱动探针stmmac_dvr_probe ...
dev, sdev->vendor, sdev->model); return SCSI_SCAN_LUN_PRESENT; } scsi_device_put(sdev); } else sdev = scsi_alloc_sdev(starget, lun, hostdata); //target中不存在lun,分配scsi_device if (!sdev) goto out; result = kmalloc(result_len, GFP_ATOMIC | ((shost->unchecked_isa_dma) ...
+++ b/drivers/crypto/hisilicon/sgl.c @@ -176,6 +176,7 @@ static void sg_map_to_hw_sg(struct scatterlist *sgl, { hw_sge->buf = sg_dma_address(sgl); hw_sge->len = cpu_to_le32(sg_dma_len(sgl)); + hw_sge->page_ctrl = sg_virt(sgl); ...
omap_hsmmc_setup_dma_transfer Sgl Length 612 Data Block Size 512 [ 1482.295658] omap_hsmmc 47810000.mmc: MMC start dma failure [ 1482.301200] brcmf_sdiod_sglist_rw: CMD53 sg block write failed -22 [ 1482.308635] brcmf_sdio_txfail: sdio error, abort command and terminate...
(DN20-50) serien-nr:220300 PARKER PVAC1ECMNSJW35-U;18839832/002;350bar code HB; GE UTC-ED-302-AW-194/GE SECURITY;57.2-90CEL IFSYS PA -14x18 10524 SCHMERSRL G50-050-M22/22Y-M20Cognex DMA-WALL-8000-00 Blum-Novotest 0 Oetiker Metallwaren- &Apparatefabrik GmbH 20300300 G1/2 ROSS...