• 设为首页
  • 点击收藏
  • 手机版
    手机扫一扫访问
    迪恩网络手机版
  • 关注官方公众号
    微信扫一扫关注
    公众号
登陆 注册

C++ bus_dmamap_create函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中bus_dmamap_create函数的典型用法代码示例。如果您正苦于以下问题：C++ bus_dmamap_create函数的具体用法？C++ bus_dmamap_create怎么用？C++ bus_dmamap_create使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了bus_dmamap_create函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: cs428x_allocmem

/* Internal functions */
int
cs428x_allocmem(struct cs428x_softc *sc, 
		size_t size, int pool, int flags,
		struct cs428x_dma *p)
{
	int error;
	size_t align;

	align   = sc->dma_align;
	p->size = sc->dma_size;
	/* allocate memory for upper audio driver */
	p->dum  = malloc(size, pool, flags);
	if (p->dum == NULL)
		return 1;

	error = bus_dmamem_alloc(sc->sc_dmatag, p->size, align, 0,
				 p->segs, sizeof(p->segs)/sizeof(p->segs[0]),
				 &p->nsegs, BUS_DMA_NOWAIT);
	if (error) {
		printf("%s: unable to allocate dma. error=%d\n",
		       sc->sc_dev.dv_xname, error);
		goto allfree;
	}

	error = bus_dmamem_map(sc->sc_dmatag, p->segs, p->nsegs, p->size,
			       &p->addr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
	if (error) {
		printf("%s: unable to map dma, error=%d\n",
		       sc->sc_dev.dv_xname, error);
		goto free;
	}

	error = bus_dmamap_create(sc->sc_dmatag, p->size, 1, p->size,
				  0, BUS_DMA_NOWAIT, &p->map);
	if (error) {
		printf("%s: unable to create dma map, error=%d\n",
		       sc->sc_dev.dv_xname, error);
		goto unmap;
	}

	error = bus_dmamap_load(sc->sc_dmatag, p->map, p->addr, p->size, NULL,
				BUS_DMA_NOWAIT);
	if (error) {
		printf("%s: unable to load dma map, error=%d\n",
		       sc->sc_dev.dv_xname, error);
		goto destroy;
	}
	return 0;

 destroy:
	bus_dmamap_destroy(sc->sc_dmatag, p->map);
 unmap:
	bus_dmamem_unmap(sc->sc_dmatag, p->addr, p->size);
 free:
	bus_dmamem_free(sc->sc_dmatag, p->segs, p->nsegs);
 allfree:
	free(p->dum, pool);

	return error;
}
开发者ID:MarginC，项目名称:kame，代码行数:61，代码来源:cs428x.c


示例2: coram_allocmem

static int
coram_allocmem(struct coram_softc *sc, size_t size, size_t align,
    struct coram_dma *p)
{
	int err;

	p->size = size;
	err = bus_dmamem_alloc(sc->sc_dmat, p->size, align, 0,
	    p->segs, sizeof(p->segs) / sizeof(p->segs[0]),
	    &p->nsegs, BUS_DMA_NOWAIT);
	if (err)
		return err;
	err = bus_dmamem_map(sc->sc_dmat, p->segs, p->nsegs, p->size,
	    &p->addr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
	if (err)
		goto free;
	err = bus_dmamap_create(sc->sc_dmat, p->size, 1, p->size, 0,
	    BUS_DMA_NOWAIT, &p->map);
	if (err)
		goto unmap;
	err = bus_dmamap_load(sc->sc_dmat, p->map, p->addr, p->size, NULL,
	    BUS_DMA_NOWAIT);
	if (err)
		goto destroy;

	return 0;
destroy:
	bus_dmamap_destroy(sc->sc_dmat, p->map);
unmap:
	bus_dmamem_unmap(sc->sc_dmat, p->addr, p->size);
free:
	bus_dmamem_free(sc->sc_dmat, p->segs, p->nsegs);

	return err;
}
开发者ID:RyanLucchese，项目名称:rumpkernel-netbsd-src，代码行数:35，代码来源:coram.c


示例3: le_sbdio_attach

void
le_sbdio_attach(device_t parent, device_t self, void *aux)
{
	struct le_sbdio_softc *lesc = device_private(self);
	struct sbdio_attach_args *sa = aux;
	struct lance_softc *sc = &lesc->sc_am7990.lsc;
	bus_dma_segment_t seg;
	int rseg;

	sc->sc_dev = self;
	lesc->sc_dmat = sa->sa_dmat;
	lesc->sc_bst  = sa->sa_bust;

	if (bus_space_map(lesc->sc_bst, sa->sa_addr1, 8 /* XXX */,
	    BUS_SPACE_MAP_LINEAR, &lesc->sc_bsh) != 0) {
		aprint_error(": cannot map registers\n");
		return;
	}

	/* Allocate DMA memory for the chip. */
	if (bus_dmamem_alloc(lesc->sc_dmat, LE_MEMSIZE, 0, 0, &seg, 1, &rseg,
	    BUS_DMA_NOWAIT) != 0) {
		aprint_error(": can't allocate DMA memory\n");
		return;
	}
	if (bus_dmamem_map(lesc->sc_dmat, &seg, rseg, LE_MEMSIZE,
	    (void **)&sc->sc_mem, BUS_DMA_NOWAIT|BUS_DMA_COHERENT) != 0) {
		aprint_error(": can't map DMA memory\n");
		return;
	}
	if (bus_dmamap_create(lesc->sc_dmat, LE_MEMSIZE, 1, LE_MEMSIZE,
	    0, BUS_DMA_NOWAIT, &lesc->sc_dmamap) != 0) {
		aprint_error(": can't create DMA map\n");
		return;
	}
	if (bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmamap, sc->sc_mem,
	    LE_MEMSIZE, NULL, BUS_DMA_NOWAIT) != 0) {
		aprint_error(": can't load DMA map\n");
		return;
	}

	sc->sc_memsize = LE_MEMSIZE;
	sc->sc_addr = lesc->sc_dmamap->dm_segs[0].ds_addr;
	sc->sc_conf3 = LE_C3_BSWP | LE_C3_BCON;
	(*platform.ether_addr)(sc->sc_enaddr);

	sc->sc_copytodesc = lance_copytobuf_contig;
	sc->sc_copyfromdesc = lance_copyfrombuf_contig;
	sc->sc_copytobuf = lance_copytobuf_contig;
	sc->sc_copyfrombuf = lance_copyfrombuf_contig;
	sc->sc_zerobuf = lance_zerobuf_contig;
#ifdef LEDEBUG
	sc->sc_debug = 0xff;
#endif
	sc->sc_rdcsr = le_sbdio_rdcsr;
	sc->sc_wrcsr = le_sbdio_wrcsr;

	am7990_config(&lesc->sc_am7990);
	intr_establish(sa->sa_irq, am7990_intr, sc);
}
开发者ID:krytarowski，项目名称:netbsd-current-src-sys，代码行数:60，代码来源:if_le_sbdio.c


示例4: ti_mmchs_activate

/**
 *	ti_mmchs_activate - activates the driver
 *	@dev: mmc device handle
 *
 *	Maps in the register set and requests an IRQ handler for the MMC controller.
 *
 *	LOCKING:
 *	None required
 *
 *	RETURNS:
 *	0 on sucess
 *	ENOMEM if failed to map register set
 */
static int
ti_mmchs_activate(device_t dev)
{
	struct ti_mmchs_softc *sc = device_get_softc(dev);
	unsigned long addr;
	int rid;
	int err;

	/* Get the memory resource for the register mapping */
	rid = 0;
	sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
	    RF_ACTIVE);
	if (sc->sc_mem_res == NULL)
		panic("%s: Cannot map registers", device_get_name(dev));

	/* Allocate an IRQ resource for the MMC controller */
	rid = 0;
	sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
	    RF_ACTIVE | RF_SHAREABLE);
	if (sc->sc_irq_res == NULL)
		goto errout;

	/* Allocate DMA tags and maps */
	err = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL,
	    NULL, MAXPHYS, 1, MAXPHYS, BUS_DMA_ALLOCNOW, NULL,
	    NULL, &sc->sc_dmatag);
	if (err != 0)
		goto errout;

	err = bus_dmamap_create(sc->sc_dmatag, 0,  &sc->sc_dmamap);
	if (err != 0)
		goto errout;

	/* Initialise the DMA channels to be used by the controller */
	err = ti_mmchs_init_dma_channels(sc);
	if (err != 0)
		goto errout;

	/* Set the register offset */
	if (ti_chip() == CHIP_OMAP_3)
		sc->sc_reg_off = OMAP3_MMCHS_REG_OFFSET;
	else if (ti_chip() == CHIP_OMAP_4)
		sc->sc_reg_off = OMAP4_MMCHS_REG_OFFSET;
	else
		panic("Unknown OMAP device\n");

	/* Get the physical address of the MMC data register, needed for DMA */
	addr = vtophys(rman_get_start(sc->sc_mem_res));
	sc->sc_data_reg_paddr = addr + sc->sc_reg_off + MMCHS_DATA;

	/* Set the initial power state to off */
	sc->sc_cur_power_mode = power_off;

	return (0);

errout:
	ti_mmchs_deactivate(dev);
	return (ENOMEM);
}
开发者ID:dmarion，项目名称:freebsd-armv6-sys，代码行数:73，代码来源:ti_mmchs.c


示例5: usb_pc_dmamap_create

/*------------------------------------------------------------------------*
 *	usb_pc_dmamap_create - create a DMA map
 *
 * Returns:
 *    0: Success
 * Else: Failure
 *------------------------------------------------------------------------*/
uint8_t
usb_pc_dmamap_create(struct usb_page_cache *pc, usb_size_t size)
{
	struct usb_xfer_root *info;
	struct usb_dma_tag *utag;

	/* get info */
	info = USB_DMATAG_TO_XROOT(pc->tag_parent);

	/* sanity check */
	if (info == NULL) {
		goto error;
	}
	utag = usb_dma_tag_find(pc->tag_parent, size, 1);
	if (utag == NULL) {
		goto error;
	}
	/* create DMA map */
	if (bus_dmamap_create(utag->tag, 0, &pc->map)) {
		goto error;
	}
	pc->tag = utag->tag;
	return 0;			/* success */

error:
	pc->map = NULL;
	pc->tag = NULL;
	return 1;			/* failure */
}
开发者ID:ragunath3252，项目名称:patch-rtems，代码行数:36，代码来源:usb_busdma.c


示例6: dcons_crom_attach

static int
dcons_crom_attach(device_t dev)
{
#ifdef NEED_NEW_DRIVER
	kprintf("dcons_crom: you need newer firewire driver\n");
	return (-1);
#else
	struct dcons_crom_softc *sc;

        sc = (struct dcons_crom_softc *) device_get_softc(dev);
	sc->fd.fc = device_get_ivars(dev);
	sc->fd.dev = dev;
	sc->fd.post_explore = NULL;
	sc->fd.post_busreset = (void *) dcons_crom_post_busreset;

	/* map dcons buffer */
	bus_dma_tag_create(
		/*parent*/ sc->fd.fc->dmat,
		/*alignment*/ sizeof(u_int32_t),
		/*boundary*/ 0,
		/*lowaddr*/ BUS_SPACE_MAXADDR,
		/*highaddr*/ BUS_SPACE_MAXADDR,
		/*filter*/NULL, /*filterarg*/NULL,
		/*maxsize*/ dcons_conf->size,
		/*nsegments*/ 1,
		/*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
		/*flags*/ BUS_DMA_ALLOCNOW,
		&sc->dma_tag);
	bus_dmamap_create(sc->dma_tag, 0, &sc->dma_map);
	bus_dmamap_load(sc->dma_tag, sc->dma_map,
	    (void *)dcons_conf->buf, dcons_conf->size,
	    dmamap_cb, sc, 0);
	return (0);
#endif
}
开发者ID:kusumi，项目名称:DragonFlyBSD，代码行数:35，代码来源:dcons_crom.c


示例7: lsi64854_attach

/*
 * Finish attaching this DMA device.
 * Front-end must fill in these fields:
 *	sc_bustag
 *	sc_dmatag
 *	sc_regs
 *	sc_burst
 *	sc_channel (one of SCSI, ENET, PP)
 *	sc_client (one of SCSI, ENET, PP `soft_c' pointers)
 */
void
lsi64854_attach(struct lsi64854_softc *sc)
{
	uint32_t csr;

	/* Indirect functions */
	switch (sc->sc_channel) {
	case L64854_CHANNEL_SCSI:
		sc->intr = lsi64854_scsi_intr;
		sc->setup = lsi64854_setup;
		break;
	case L64854_CHANNEL_ENET:
		sc->intr = lsi64854_enet_intr;
		break;
	case L64854_CHANNEL_PP:
		sc->setup = lsi64854_setup_pp;
		break;
	default:
		aprint_error(": unknown channel");
	}
	sc->reset = lsi64854_reset;

	/* Allocate a dmamap */
	if (bus_dmamap_create(sc->sc_dmatag, MAX_DMA_SZ, 1, MAX_DMA_SZ,
	    0, BUS_DMA_WAITOK, &sc->sc_dmamap) != 0) {
		aprint_error(": DMA map create failed\n");
		return;
	}

	csr = L64854_GCSR(sc);
	sc->sc_rev = csr & L64854_DEVID;
	if (sc->sc_rev == DMAREV_HME) {
		return;
	}
	aprint_normal(": DMA rev ");
	switch (sc->sc_rev) {
	case DMAREV_0:
		aprint_normal("0");
		break;
	case DMAREV_ESC:
		aprint_normal("esc");
		break;
	case DMAREV_1:
		aprint_normal("1");
		break;
	case DMAREV_PLUS:
		aprint_normal("1+");
		break;
	case DMAREV_2:
		aprint_normal("2");
		break;
	default:
		aprint_normal("unknown (0x%x)", sc->sc_rev);
	}

	DPRINTF(LDB_ANY, (", burst 0x%x, csr 0x%x", sc->sc_burst, csr));
	aprint_normal("\n");
}
开发者ID:Tommmster，项目名称:netbsd-avr32，代码行数:68，代码来源:lsi64854.c


示例8: imxenet_dma_malloc

/*
 * Manage DMA'able memory.
 */
int
imxenet_dma_malloc(struct imxenet_softc *sc, bus_size_t size,
    struct imxenet_dma_alloc *dma)
{
	int r;

	dma->dma_tag = sc->sc_dma_tag;
	r = bus_dmamem_alloc(dma->dma_tag, size, ENET_ALIGNMENT, 0, &dma->dma_seg,
	    1, &dma->dma_nseg, BUS_DMA_NOWAIT);
	if (r != 0) {
		printf("%s: imxenet_dma_malloc: bus_dmammem_alloc failed; "
			"size %lu, error %d\n", sc->sc_dev.dv_xname,
			(unsigned long)size, r);
		goto fail_0;
	}

	r = bus_dmamem_map(dma->dma_tag, &dma->dma_seg, dma->dma_nseg, size,
	    &dma->dma_vaddr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
	if (r != 0) {
		printf("%s: imxenet_dma_malloc: bus_dmammem_map failed; "
			"size %lu, error %d\n", sc->sc_dev.dv_xname,
			(unsigned long)size, r);
		goto fail_1;
	}

	r = bus_dmamap_create(dma->dma_tag, size, 1,
	    size, 0, BUS_DMA_NOWAIT, &dma->dma_map);
	if (r != 0) {
		printf("%s: imxenet_dma_malloc: bus_dmamap_create failed; "
			"error %u\n", sc->sc_dev.dv_xname, r);
		goto fail_2;
	}

	r = bus_dmamap_load(dma->dma_tag, dma->dma_map,
			    dma->dma_vaddr, size, NULL,
			    BUS_DMA_NOWAIT);
	if (r != 0) {
		printf("%s: imxenet_dma_malloc: bus_dmamap_load failed; "
			"error %u\n", sc->sc_dev.dv_xname, r);
		goto fail_3;
	}

	dma->dma_size = size;
	dma->dma_paddr = dma->dma_map->dm_segs[0].ds_addr;
	return (0);

fail_3:
	bus_dmamap_destroy(dma->dma_tag, dma->dma_map);
fail_2:
	bus_dmamem_unmap(dma->dma_tag, dma->dma_vaddr, size);
fail_1:
	bus_dmamem_free(dma->dma_tag, &dma->dma_seg, dma->dma_nseg);
fail_0:
	dma->dma_map = NULL;
	dma->dma_tag = NULL;

	return (r);
}
开发者ID:appleorange1，项目名称:bitrig，代码行数:61，代码来源:imxenet.c


示例9: ldc_map_alloc

struct ldc_map *
ldc_map_alloc(int nentries)
#endif
{
	struct ldc_map *lm;
	bus_size_t size;
	vaddr_t va = 0;

#if OPENBSD_BUSDMA
	int nsegs;
#endif
	lm = kmem_zalloc(sizeof(struct ldc_map), KM_NOSLEEP);
	if (lm == NULL)
		return NULL;

	size = roundup(nentries * sizeof(struct ldc_map_slot), PAGE_SIZE);

#if OPENBSD_BUSDMA
	if (bus_dmamap_create(t, size, 1, size, 0,
			      BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &lm->lm_map) != 0) {
		DPRINTF(("ldc_map_alloc() - bus_dmamap_create() failed\n"));
		return (NULL);
	}

	if (bus_dmamem_alloc(t, size, PAGE_SIZE, 0, &lm->lm_seg, 1,
			     &nsegs, BUS_DMA_NOWAIT) != 0) {
		DPRINTF(("ldc_map_alloc() - bus_dmamem_alloc() failed\n"));
		goto destroy;
	}

	if (bus_dmamem_map(t, &lm->lm_seg, 1, size, (void *)&va,
			   BUS_DMA_NOWAIT) != 0) {
		DPRINTF(("ldc_map_alloc() - bus_dmamem_map() failed\n"));
		goto free;
	}
	if (bus_dmamap_load(t, lm->lm_map, (void*)va, size, NULL,
			    BUS_DMA_NOWAIT) != 0) {
		DPRINTF(("ldc_map_alloc() - bus_dmamap_load() failed\n"));
		goto unmap;
	}
#else
	va = (vaddr_t)kmem_zalloc(size, KM_NOSLEEP);
#endif
	lm->lm_slot = (struct ldc_map_slot *)va;
	lm->lm_nentries = nentries;
	bzero(lm->lm_slot, nentries * sizeof(struct ldc_map_slot));
	return (lm);

#if OPENBSD_BUSDMA
unmap:
	bus_dmamem_unmap(t, (void*)va, size);
free:
	bus_dmamem_free(t, &lm->lm_seg, 1);
destroy:
	bus_dmamap_destroy(t, lm->lm_map);
#endif
	return (NULL);
}
开发者ID:ryo，项目名称:netbsd-src，代码行数:58，代码来源:ldc.c


示例10: pxa2x0_i2s_allocm

void *
pxa2x0_i2s_allocm(void *hdl, int direction, size_t size, int type, int flags)
{
	struct device *sc_dev = hdl;
	struct pxa2x0_i2s_softc *sc =
	    (struct pxa2x0_i2s_softc *)((struct device *)hdl + 1);
	struct pxa2x0_i2s_dma *p;
	int error;
	int rseg;

	p = malloc(sizeof(*p), type, flags);
	if (!p)
		return 0;

	p->size = size;
	if ((error = bus_dmamem_alloc(sc->sc_dmat, size, NBPG, 0, &p->seg, 1,
	    &rseg, BUS_DMA_NOWAIT)) != 0) {
		printf("%s: unable to allocate dma, error = %d\n",
		    sc_dev->dv_xname, error);
		goto fail_alloc;
	}

	if ((error = bus_dmamem_map(sc->sc_dmat, &p->seg, rseg, size, &p->addr,
	    BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
		printf("%s: unable to map dma, error = %d\n",
		    sc_dev->dv_xname, error);
		goto fail_map;
	}

	if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
	    BUS_DMA_NOWAIT, &p->map)) != 0) {
		printf("%s: unable to create dma map, error = %d\n",
		    sc_dev->dv_xname, error);
		goto fail_create;
	}

	if ((error = bus_dmamap_load(sc->sc_dmat, p->map, p->addr, size, NULL,
	    BUS_DMA_NOWAIT)) != 0) {
		printf("%s: unable to load dma map, error = %d\n",
		    sc_dev->dv_xname, error);
		goto fail_load;
	}

	p->next = sc->sc_dmas;
	sc->sc_dmas = p;

	return p->addr;

fail_load:
	bus_dmamap_destroy(sc->sc_dmat, p->map);
fail_create:
	bus_dmamem_unmap(sc->sc_dmat, p->addr, size);
fail_map:
	bus_dmamem_free(sc->sc_dmat, &p->seg, 1);
fail_alloc:
	free(p, type);
	return 0;
}
开发者ID:repos-holder，项目名称:openbsd-patches，代码行数:58，代码来源:pxa2x0_i2s.c


示例11: fms_malloc

static void *
fms_malloc(void *addr, int direction, size_t size)
{
	struct fms_softc *sc;
	struct fms_dma *p;
	int error;
	int rseg;

	sc = addr;
	p = kmem_alloc(sizeof(*p), KM_SLEEP);
	if (p == NULL)
		return NULL;

	p->size = size;
	if ((error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, &p->seg,
				      1, &rseg, BUS_DMA_WAITOK)) != 0) {
		aprint_error_dev(sc->sc_dev, "unable to allocate DMA, error = %d\n", error);
		goto fail_alloc;
	}

	if ((error = bus_dmamem_map(sc->sc_dmat, &p->seg, rseg, size, &p->addr,
				    BUS_DMA_WAITOK | BUS_DMA_COHERENT)) != 0) {
		aprint_error_dev(sc->sc_dev, "unable to map DMA, error = %d\n",
		       error);
		goto fail_map;
	}

	if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
				       BUS_DMA_WAITOK, &p->map)) != 0) {
		aprint_error_dev(sc->sc_dev, "unable to create DMA map, error = %d\n",
		       error);
		goto fail_create;
	}

	if ((error = bus_dmamap_load(sc->sc_dmat, p->map, p->addr, size, NULL,
				     BUS_DMA_WAITOK)) != 0) {
		aprint_error_dev(sc->sc_dev, "unable to load DMA map, error = %d\n",
		       error);
		goto fail_load;
	}

	p->next = sc->sc_dmas;
	sc->sc_dmas = p;

	return p->addr;


fail_load:
	bus_dmamap_destroy(sc->sc_dmat, p->map);
fail_create:
	bus_dmamem_unmap(sc->sc_dmat, p->addr, size);
fail_map:
	bus_dmamem_free(sc->sc_dmat, &p->seg, 1);
fail_alloc:
	kmem_free(p, sizeof(*p));
	return NULL;
}
开发者ID:RyanLucchese，项目名称:rumpkernel-netbsd-src，代码行数:57，代码来源:fms.c


示例12: ahaallocccbs

static void
ahaallocccbs(struct aha_softc *aha)
{
	struct aha_ccb *next_ccb;
	struct sg_map_node *sg_map;
	bus_addr_t physaddr;
	aha_sg_t *segs;
	int newcount;
	int i;

	next_ccb = &aha->aha_ccb_array[aha->num_ccbs];

	sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);

	if (sg_map == NULL)
		return;

	/* Allocate S/G space for the next batch of CCBS */
	if (bus_dmamem_alloc(aha->sg_dmat, (void **)&sg_map->sg_vaddr,
	    BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
		free(sg_map, M_DEVBUF);
		return;
	}

	SLIST_INSERT_HEAD(&aha->sg_maps, sg_map, links);

	bus_dmamap_load(aha->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
	    PAGE_SIZE, ahamapsgs, aha, /*flags*/0);

	segs = sg_map->sg_vaddr;
	physaddr = sg_map->sg_physaddr;

	newcount = (PAGE_SIZE / (AHA_NSEG * sizeof(aha_sg_t)));
	for (i = 0; aha->num_ccbs < aha->max_ccbs && i < newcount; i++) {
		int error;

		next_ccb->sg_list = segs;
		next_ccb->sg_list_phys = physaddr;
		next_ccb->flags = ACCB_FREE;
		callout_init_mtx(&next_ccb->timer, &aha->lock, 0);
		error = bus_dmamap_create(aha->buffer_dmat, /*flags*/0,
		    &next_ccb->dmamap);
		if (error != 0)
			break;
		SLIST_INSERT_HEAD(&aha->free_aha_ccbs, next_ccb, links);
		segs += AHA_NSEG;
		physaddr += (AHA_NSEG * sizeof(aha_sg_t));
		next_ccb++;
		aha->num_ccbs++;
	}

	/* Reserve a CCB for error recovery */
	if (aha->recovery_accb == NULL) {
		aha->recovery_accb = SLIST_FIRST(&aha->free_aha_ccbs);
		SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
	}
}
开发者ID:2trill2spill，项目名称:freebsd，代码行数:57，代码来源:aha.c


示例13: auich_alloc_cdata

static int
auich_alloc_cdata(struct auich_softc *sc)
{
	bus_dma_segment_t seg;
	int error, rseg;

	/*
	 * Allocate the control data structure, and create and load the
	 * DMA map for it.
	 */
	if ((error = bus_dmamem_alloc(sc->dmat,
				      sizeof(struct auich_cdata),
				      PAGE_SIZE, 0, &seg, 1, &rseg, 0)) != 0) {
		aprint_error_dev(sc->sc_dev, "unable to allocate control data, error = %d\n", error);
		goto fail_0;
	}

	if ((error = bus_dmamem_map(sc->dmat, &seg, rseg,
				    sizeof(struct auich_cdata),
				    (void **) &sc->sc_cdata,
				    sc->sc_dmamap_flags)) != 0) {
		aprint_error_dev(sc->sc_dev, "unable to map control data, error = %d\n", error);
		goto fail_1;
	}

	if ((error = bus_dmamap_create(sc->dmat, sizeof(struct auich_cdata), 1,
				       sizeof(struct auich_cdata), 0, 0,
				       &sc->sc_cddmamap)) != 0) {
		aprint_error_dev(sc->sc_dev, "unable to create control data DMA map, "
		    "error = %d\n", error);
		goto fail_2;
	}

	if ((error = bus_dmamap_load(sc->dmat, sc->sc_cddmamap,
				     sc->sc_cdata, sizeof(struct auich_cdata),
				     NULL, 0)) != 0) {
		aprint_error_dev(sc->sc_dev, "unable tp load control data DMA map, "
		    "error = %d\n", error);
		goto fail_3;
	}

	sc->pcmo.dmalist = sc->sc_cdata->ic_dmalist_pcmo;
	sc->pcmi.dmalist = sc->sc_cdata->ic_dmalist_pcmi;
	sc->mici.dmalist = sc->sc_cdata->ic_dmalist_mici;

	return 0;

 fail_3:
	bus_dmamap_destroy(sc->dmat, sc->sc_cddmamap);
 fail_2:
	bus_dmamem_unmap(sc->dmat, (void *) sc->sc_cdata,
	    sizeof(struct auich_cdata));
 fail_1:
	bus_dmamem_free(sc->dmat, &seg, rseg);
 fail_0:
	return error;
}
开发者ID:RyanLucchese，项目名称:rumpkernel-netbsd-src，代码行数:57，代码来源:auich.c


示例14: auvia_malloc

void *
auvia_malloc(void *addr, int direction, size_t size, int pool, int flags)
{
	struct auvia_softc *sc = addr;
	struct auvia_dma *p;
	int error;
	int rseg;

	p = malloc(sizeof(*p), pool, flags);
	if (!p)
		return 0;

	p->size = size;
	if ((error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, &p->seg,
	    1, &rseg, BUS_DMA_NOWAIT)) != 0) {
		printf("%s: unable to allocate dma, error = %d\n",
		    sc->sc_dev.dv_xname, error);
		goto fail_alloc;
	}

	if ((error = bus_dmamem_map(sc->sc_dmat, &p->seg, rseg, size, &p->addr,
	    BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
		printf("%s: unable to map dma, error = %d\n",
		    sc->sc_dev.dv_xname, error);
		goto fail_map;
	}

	if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
	    BUS_DMA_NOWAIT, &p->map)) != 0) {
		printf("%s: unable to create dma map, error = %d\n",
		    sc->sc_dev.dv_xname, error);
		goto fail_create;
	}

	if ((error = bus_dmamap_load(sc->sc_dmat, p->map, p->addr, size, NULL,
	    BUS_DMA_NOWAIT)) != 0) {
		printf("%s: unable to load dma map, error = %d\n",
		    sc->sc_dev.dv_xname, error);
		goto fail_load;
	}

	p->next = sc->sc_dmas;
	sc->sc_dmas = p;

	return p->addr;


fail_load:
	bus_dmamap_destroy(sc->sc_dmat, p->map);
fail_create:
	bus_dmamem_unmap(sc->sc_dmat, p->addr, size);
fail_map:
	bus_dmamem_free(sc->sc_dmat, &p->seg, 1);
fail_alloc:
	free(p, pool);
	return 0;
}
开发者ID:alenichev，项目名称:openbsd-kernel，代码行数:57，代码来源:auvia.c


示例15: ata_dmaalloc

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);
}
开发者ID:hmatyschok，项目名称:MeshBSD，代码行数:55，代码来源:ata-dma.c


示例16: at91_spi_attach

static int
at91_spi_attach(device_t dev)
{
	struct at91_spi_softc *sc = device_get_softc(dev);
	int err, i;

	sc->dev = dev;
	err = at91_spi_activate(dev);
	if (err)
		goto out;

	/*
	 * Allocate DMA tags and maps
	 */
	err = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 2058, 1,
	    2048, BUS_DMA_ALLOCNOW, NULL, NULL, &sc->dmatag);
	if (err != 0)
		goto out;
	for (i = 0; i < 4; i++) {
		err = bus_dmamap_create(sc->dmatag, 0,  &sc->map[i]);
		if (err != 0)
			goto out;
	}

	// reset the SPI
	WR4(sc, SPI_CR, SPI_CR_SWRST);
	WR4(sc, SPI_IDR, 0xffffffff);

	WR4(sc, SPI_MR, (0xf << 24) | SPI_MR_MSTR | SPI_MR_MODFDIS |
	    (0xE << 16));

	WR4(sc, SPI_CSR0, SPI_CSR_CPOL | (4 << 16) | (2 << 8));
	WR4(sc, SPI_CR, SPI_CR_SPIEN);

	WR4(sc, PDC_PTCR, PDC_PTCR_TXTDIS);
	WR4(sc, PDC_PTCR, PDC_PTCR_RXTDIS);
	WR4(sc, PDC_RNPR, 0);
	WR4(sc, PDC_RNCR, 0);
	WR4(sc, PDC_TNPR, 0);
	WR4(sc, PDC_TNCR, 0);
	WR4(sc, PDC_RPR, 0);
	WR4(sc, PDC_RCR, 0);
	WR4(sc, PDC_TPR, 0);
	WR4(sc, PDC_TCR, 0);
	RD4(sc, SPI_RDR);
	RD4(sc, SPI_SR);

	device_add_child(dev, "spibus", -1);
	bus_generic_attach(dev);
out:;
	if (err)
		at91_spi_deactivate(dev);
	return (err);
}
开发者ID:DangerDexter，项目名称:FreeBSD-8.0-dyntick，代码行数:55，代码来源:at91_spi.c


示例17: drm_pci_alloc

drm_dma_handle_t *
drm_pci_alloc(drm_device_t *dev, size_t size, size_t align, dma_addr_t maxaddr)
{
    drm_dma_handle_t *h;
    int error, nsegs;


    /* Need power-of-two alignment, so fail the allocation if it isn't. */
    if ((align & (align - 1)) != 0) {
        DRM_ERROR("drm_pci_alloc with non-power-of-two alignment %d\n",
                  (int)align);
        return NULL;
    }

    h = malloc(sizeof(drm_dma_handle_t), M_DRM, M_ZERO | M_NOWAIT);

    if (h == NULL)
        return NULL;
    if ((error = bus_dmamem_alloc(dev->pa.pa_dmat, size, align, 0,
                                  h->segs, 1, &nsegs, BUS_DMA_NOWAIT)) != 0) {
        printf("drm: Unable to allocate DMA, error %d\n", error);
        goto fail;
    }
    if ((error = bus_dmamem_map(dev->pa.pa_dmat, h->segs, nsegs, size,
                                &h->addr, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
        printf("drm: Unable to map DMA, error %d\n", error);
        goto free;
    }
    if ((error = bus_dmamap_create(dev->pa.pa_dmat, size, 1, size, 0,
                                   BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &h->map)) != 0) {
        printf("drm: Unable to create DMA map, error %d\n", error);
        goto unmap;
    }
    if ((error = bus_dmamap_load(dev->pa.pa_dmat, h->map, h->addr, size,
                                 NULL, BUS_DMA_NOWAIT)) != 0) {
        printf("drm: Unable to load DMA map, error %d\n", error);
        goto destroy;
    }
    h->busaddr = DRM_PCI_DMAADDR(h);
    h->vaddr = h->addr;
    h->size = size;

    return h;

destroy:
    bus_dmamap_destroy(dev->pa.pa_dmat, h->map);
unmap:
    bus_dmamem_unmap(dev->pa.pa_dmat, h->addr, size);
free:
    bus_dmamem_free(dev->pa.pa_dmat, h->segs, 1);
fail:
    free(h, M_DRM);
    return NULL;

}
开发者ID:lacombar，项目名称:netbsd-alc，代码行数:55，代码来源:drm_pci.c


示例18: wdsc_attach

/*
 * Attach the wdsc driver
 */
void
wdsc_attach(struct device *parent, struct device *self, void *aux)
{
	struct wdsc_softc *wsc = (struct wdsc_softc *)self;
	struct wd33c93_softc *sc = &wsc->sc_wd33c93;
	struct hpc_attach_args *haa = aux;
	int err;

	sc->sc_regt = haa->ha_st;
	wsc->sc_dmat = haa->ha_dmat;

	wsc->sc_hpcdma.hpc = haa->hpc_regs;

	if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh,
	    haa->ha_devoff + 3, 1, &sc->sc_asr_regh)) != 0) {
		printf(": unable to map asr reg, err=%d\n", err);
		return;
	}

	if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh,
	    haa->ha_devoff + 3 + 4,  1, &sc->sc_data_regh)) != 0) {
		printf(": unable to map data reg, err=%d\n", err);
		return;
	}

	if (bus_dmamap_create(wsc->sc_dmat, MAXPHYS,
	    wsc->sc_hpcdma.hpc->scsi_dma_segs,
	    wsc->sc_hpcdma.hpc->scsi_dma_segs_size,
	    wsc->sc_hpcdma.hpc->scsi_dma_segs_size,
	    BUS_DMA_WAITOK, &wsc->sc_dmamap) != 0) {
		printf(": failed to create dmamap\n");
		return;
	}

	sc->sc_dmasetup = wdsc_dmasetup;
	sc->sc_dmago    = wdsc_dmago;
	sc->sc_dmastop  = wdsc_dmastop;
	sc->sc_reset	= wdsc_reset;

	sc->sc_id = 0;					/* Host ID = 0 */
	sc->sc_clkfreq = 200;				/* 20MHz */
	sc->sc_dmamode = SBIC_CTL_BURST_DMA;

	if (hpc_intr_establish(haa->ha_irq, IPL_BIO,
	     wd33c93_intr, wsc, self->dv_xname) == NULL) {
		printf(": unable to establish interrupt!\n");
		return;
	}

	hpcdma_init(haa, &wsc->sc_hpcdma, wsc->sc_hpcdma.hpc->scsi_dma_segs);
	wd33c93_attach(sc, &wdsc_switch);
}
开发者ID:ajinkya93，项目名称:OpenBSD，代码行数:55，代码来源:wdsc.c


示例19: vioscsi_req_get

static struct vioscsi_req *
vioscsi_req_get(struct vioscsi_softc *sc)
{
	struct virtio_softc *vsc = device_private(device_parent(sc->sc_dev));
	struct virtqueue *vq = &sc->sc_vqs[2];
	struct vioscsi_req *vr;
	int r, slot;

	if ((r = virtio_enqueue_prep(vsc, vq, &slot)) != 0) {
		DPRINTF(("%s: virtio_enqueue_get error %d\n", __func__, r));
		goto err1;
	}
	vr = &sc->sc_reqs[slot];

	vr->vr_req.id = slot;
	vr->vr_req.task_attr = VIRTIO_SCSI_S_SIMPLE;

	r = bus_dmamap_create(vsc->sc_dmat,
	    offsetof(struct vioscsi_req, vr_xs), 1,
	    offsetof(struct vioscsi_req, vr_xs), 0,
	    BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &vr->vr_control);
	if (r != 0) {
		DPRINTF(("%s: bus_dmamap_create xs error %d\n", __func__, r));
		goto err2;
	}
	r = bus_dmamap_create(vsc->sc_dmat, MAXPHYS, sc->sc_seg_max,
	    MAXPHYS, 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &vr->vr_data);
	if (r != 0) {
		DPRINTF(("%s: bus_dmamap_create data error %d\n", __func__, r));
		goto err3;
	}
	r = bus_dmamap_load(vsc->sc_dmat, vr->vr_control,
	    vr, offsetof(struct vioscsi_req, vr_xs), NULL,
	    BUS_DMA_NOWAIT);
	if (r != 0) {
		DPRINTF(("%s: bus_dmamap_create ctrl error %d\n", __func__, r));
		goto err4;
	}

	DPRINTF(("%s: %p, %d\n", __func__, vr, slot));

	return vr;

err4:
	bus_dmamap_destroy(vsc->sc_dmat, vr->vr_data);
err3:
	bus_dmamap_destroy(vsc->sc_dmat, vr->vr_control);
err2:
	virtio_enqueue_abort(vsc, vq, slot);
err1:
	return NULL;
}
开发者ID:ycui1984，项目名称:netbsd-src，代码行数:52，代码来源:vioscsi.c


示例20: ldc_queue_alloc

struct ldc_queue *
ldc_queue_alloc(int nentries)
#endif
{
	struct ldc_queue *lq;
	bus_size_t size;
	vaddr_t va = 0;
#if OPENBSD_BUSDMA
	int nsegs;
#endif

	lq = kmem_zalloc(sizeof(struct ldc_queue), KM_NOSLEEP);
	if (lq == NULL)
		return NULL;

	mutex_init(&lq->lq_mtx, MUTEX_DEFAULT, IPL_TTY);

	size = roundup(nentries * sizeof(struct ldc_pkt), PAGE_SIZE);
#if OPENBSD_BUSDMA
	if (bus_dmamap_create(t, size, 1, size, 0,
	    BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &lq->lq_map) != 0)
		return (NULL);

	if (bus_dmamem_alloc(t, size, PAGE_SIZE, 0, &lq->lq_seg, 1,
	    &nsegs, BUS_DMA_NOWAIT) != 0)
		goto destroy;

	if (bus_dmamem_map(t, &lq->lq_seg, 1, size, (void *)&va,
	    BUS_DMA_NOWAIT) != 0)
		goto free;

	 if (bus_dmamap_load(t, lq->lq_map, (void*)va, size, NULL,
	    BUS_DMA_NOWAIT) != 0)
		goto unmap;
#else
	 va = (vaddr_t)kmem_zalloc(size, KM_NOSLEEP);
#endif
	lq->lq_va = (vaddr_t)va;
	lq->lq_nentries = nentries;
	return (lq);
#if OPENBSD_BUSDMA
unmap:
	bus_dmamem_unmap(t, (void*)va, size);
free:
	bus_dmamem_free(t, &lq->lq_seg, 1);
destroy:
	bus_dmamap_destroy(t, lq->lq_map);
#endif
	return (NULL);
}
开发者ID:ryo，项目名称:netbsd-src，代码行数:50，代码来源:ldc.c



注：本文中的bus_dmamap_create函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

鲜花
握手
雷人
路过
鸡蛋
该文章已有0人参与评论

请发表评论

全部评论

专题导读
More+
上一篇：
C++ bus_dmamap_destroy函数代码示例发布时间：2022-05-30
下一篇：
C++ bus_dma_tag_destroy函数代码示例发布时间：2022-05-30
热门推荐
More+
热门话题
More+
阅读排行榜

扫描微信二维码

查看手机版网站

随时了解更新最新资讯

139-2527-9053

在线客服（服务时间 9:00～18:00）

在线QQ客服
地址：深圳市南山区西丽大学城创智工业园
电邮：jeky_zhao#qq.com
移动电话：139-2527-9053

Powered by 互联科技 X3.4© 2001-2213 极客世界.|Sitemap