C++ (Cpp) ata_dmafreeの例

コード例 #1

ファイル: ata-dma.c プロジェクト: hmatyschok/MeshBSD

static void
ata_dmaalloc(device_t dev)
{
    struct ata_channel *ch = device_get_softc(dev);
    struct ata_dc_cb_args dcba;
    int i;

    /* alloc and setup needed dma slots */
    bzero(ch->dma.slot, sizeof(struct ata_dmaslot) * ATA_DMA_SLOTS);
    for (i = 0; i < ch->dma.dma_slots; i++) {
	struct ata_dmaslot *slot = &ch->dma.slot[i];

	if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, PAGE_SIZE,
			       ch->dma.max_address, BUS_SPACE_MAXADDR,
			       NULL, NULL, PAGE_SIZE, 1, PAGE_SIZE,
			       0, NULL, NULL, &slot->sg_tag)) {
            device_printf(ch->dev, "FAILURE - create sg_tag\n");
            goto error;
	}

	if (bus_dmamem_alloc(slot->sg_tag, (void **)&slot->sg, BUS_DMA_WAITOK,
			     &slot->sg_map)) {
	    device_printf(ch->dev, "FAILURE - alloc sg_map\n");
	    goto error;
        }

	if (bus_dmamap_load(slot->sg_tag, slot->sg_map, slot->sg, MAXTABSZ,
			    ata_dmasetupc_cb, &dcba, 0) || dcba.error) {
	    device_printf(ch->dev, "FAILURE - load sg\n");
	    goto error;
	}
	slot->sg_bus = dcba.maddr;

	if (bus_dma_tag_create(ch->dma.dmatag,
			       ch->dma.alignment, ch->dma.boundary,
                               ch->dma.max_address, BUS_SPACE_MAXADDR,
                               NULL, NULL, ch->dma.max_iosize,
                               ATA_DMA_ENTRIES, ch->dma.segsize,
                               BUS_DMA_ALLOCNOW, NULL, NULL, &slot->data_tag)) {
	    device_printf(ch->dev, "FAILURE - create data_tag\n");
	    goto error;
	}

	if (bus_dmamap_create(slot->data_tag, 0, &slot->data_map)) {
	    device_printf(ch->dev, "FAILURE - create data_map\n");
	    goto error;
        }
    }

    return;

error:
    device_printf(dev, "WARNING - DMA allocation failed, disabling DMA\n");
    ata_dmafree(dev);
}

コード例 #2

ファイル: ata-dma.c プロジェクト: AhmadTux/DragonFlyBSD

static void
ata_dmaalloc(device_t dev)
{
    struct ata_channel *ch = device_get_softc(dev);
    struct ata_dc_cb_args ccba;

    if (bus_dma_tag_create(NULL, ch->dma->alignment, 0,
			   ch->dma->max_address, BUS_SPACE_MAXADDR,
			   NULL, NULL, ch->dma->max_iosize,
			   ATA_DMA_ENTRIES, ch->dma->segsize,
			   0, &ch->dma->dmatag))
	goto error;

    if (bus_dma_tag_create(ch->dma->dmatag, PAGE_SIZE, PAGE_SIZE,
			   ch->dma->max_address, BUS_SPACE_MAXADDR,
			   NULL, NULL, MAXTABSZ, 1, MAXTABSZ,
			   0, &ch->dma->sg_tag))
	goto error;

    if (bus_dma_tag_create(ch->dma->dmatag,ch->dma->alignment,ch->dma->boundary,
			   ch->dma->max_address, BUS_SPACE_MAXADDR,
			   NULL, NULL, ch->dma->max_iosize,
			   ATA_DMA_ENTRIES, ch->dma->segsize,
			   0, &ch->dma->data_tag))
	goto error;

    if (bus_dmamem_alloc(ch->dma->sg_tag, (void **)&ch->dma->sg, 0,
			 &ch->dma->sg_map))
	goto error;

    if (bus_dmamap_load(ch->dma->sg_tag, ch->dma->sg_map, ch->dma->sg,
			MAXTABSZ, ata_dmasetupc_cb, &ccba, 0) || ccba.error) {
	bus_dmamem_free(ch->dma->sg_tag, ch->dma->sg, ch->dma->sg_map);
	goto error;
    }
    ch->dma->sg_bus = ccba.maddr;

    if (bus_dmamap_create(ch->dma->data_tag, 0, &ch->dma->data_map))
	goto error;

    if (bus_dma_tag_create(ch->dma->dmatag, PAGE_SIZE, 64 * 1024,
			   ch->dma->max_address, BUS_SPACE_MAXADDR,
			   NULL, NULL, MAXWSPCSZ, 1, MAXWSPCSZ,
			   0, &ch->dma->work_tag))
	goto error;

    if (bus_dmamem_alloc(ch->dma->work_tag, (void *)&ch->dma->work, 0,
			 (void *)&ch->dma->work_map))
	goto error;

    if (bus_dmamap_load(ch->dma->work_tag, ch->dma->work_map,ch->dma->work,
			MAXWSPCSZ, ata_dmasetupc_cb, &ccba, 0) || ccba.error) {
	bus_dmamem_free(ch->dma->work_tag,ch->dma->work, ch->dma->work_map);
	goto error;
    }
    ch->dma->work_bus = ccba.maddr;

    return;

error:
    device_printf(dev, "WARNING - DMA allocation failed, disabling DMA\n");
    ata_dmafree(dev);
    kfree(ch->dma, M_ATADMA);
    ch->dma = NULL;
}