C++ pci_iounmap函数代码示例

static int __devinit ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
{
	int error = -ENOMEM;

	/* map the memory mapped i/o registers */
	hw->mmio_vaddr = pci_iomap(pdev, 1, 0);
	if (hw->mmio_vaddr == NULL) {
		dev_err(&pdev->dev, "Error mapping mmio\n");
		goto out;
	}

	/* map the adapter shared memory region */
	hw->ram_vaddr = pci_iomap(pdev, 2, MAX_CCB * ILOHW_CCB_SZ);
	if (hw->ram_vaddr == NULL) {
		dev_err(&pdev->dev, "Error mapping shared mem\n");
		goto mmio_free;
	}

	/* map the doorbell aperture */
	hw->db_vaddr = pci_iomap(pdev, 3, MAX_CCB * ONE_DB_SIZE);
	if (hw->db_vaddr == NULL) {
		dev_err(&pdev->dev, "Error mapping doorbell\n");
		goto ram_free;
	}

	return 0;
ram_free:
	pci_iounmap(pdev, hw->ram_vaddr);
mmio_free:
	pci_iounmap(pdev, hw->mmio_vaddr);
out:
	return error;
}

static void kvaser_pci_del_chan(struct net_device *dev)
{
	struct sja1000_priv *priv;
	struct kvaser_pci *board;
	int i;

	if (!dev)
		return;
	priv = netdev_priv(dev);
	board = priv->priv;
	if (!board)
		return;

	dev_info(&board->pci_dev->dev, "Removing device %s\n",
		 dev->name);

	/* Disable PCI interrupts */
	kvaser_pci_disable_irq(dev);

	for (i = 0; i < board->no_channels - 1; i++) {
		if (board->slave_dev[i]) {
			dev_info(&board->pci_dev->dev, "Removing device %s\n",
				 board->slave_dev[i]->name);
			unregister_sja1000dev(board->slave_dev[i]);
			free_sja1000dev(board->slave_dev[i]);
		}
	}
	unregister_sja1000dev(dev);

	pci_iounmap(board->pci_dev, priv->reg_base);
	pci_iounmap(board->pci_dev, board->conf_addr);
	pci_iounmap(board->pci_dev, board->res_addr);

	free_sja1000dev(dev);
}

static void __devexit peak_pci_remove(struct pci_dev *pdev)
{
    struct net_device *dev = pci_get_drvdata(pdev); /* Last device */
    struct sja1000_priv *priv = netdev_priv(dev);
    struct peak_pci_chan *chan = priv->priv;
    void __iomem *cfg_base = chan->cfg_base;
    void __iomem *reg_base = priv->reg_base;

    /* Disable interrupts */
    writew(0x0, cfg_base + PITA_ICR + 2);

    /* Loop over all registered devices */
    while (1) {
        dev_info(&pdev->dev, "removing device %s\n", dev->name);
        unregister_sja1000dev(dev);
        free_sja1000dev(dev);
        dev = chan->prev_dev;
        if (!dev)
            break;
        priv = netdev_priv(dev);
        chan = priv->priv;
    }

    pci_iounmap(pdev, reg_base);
    pci_iounmap(pdev, cfg_base);
    pci_release_regions(pdev);
    pci_disable_device(pdev);

    pci_set_drvdata(pdev, NULL);
}

static void ems_pci_del_card(struct pci_dev *pdev)
{
	struct ems_pci_card *card = pci_get_drvdata(pdev);
	struct net_device *dev;
	int i = 0;

	for (i = 0; i < card->channels; i++) {
		dev = card->net_dev[i];

		if (!dev)
			continue;

		dev_info(&pdev->dev, "Removing %s.\n", dev->name);
		unregister_sja1000dev(dev);
		free_sja1000dev(dev);
	}

	if (card->base_addr != NULL)
		pci_iounmap(card->pci_dev, card->base_addr);

	if (card->conf_addr != NULL)
		pci_iounmap(card->pci_dev, card->conf_addr);

	kfree(card);

	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
}

static void orinoco_tmd_remove_one(struct pci_dev *pdev)
{
	struct orinoco_private *priv = pci_get_drvdata(pdev);
	struct orinoco_pci_card *card = priv->card;

	orinoco_if_del(priv);
	free_irq(pdev->irq, priv);
	free_orinocodev(priv);
	pci_iounmap(pdev, priv->hw.iobase);
	pci_iounmap(pdev, card->bridge_io);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
}

int ast_driver_unload(struct drm_device *dev)
{
	struct ast_private *ast = dev->dev_private;

	ast_mode_fini(dev);
	ast_fbdev_fini(dev);
	drm_mode_config_cleanup(dev);

	ast_mm_fini(ast);
	pci_iounmap(dev->pdev, ast->ioregs);
	pci_iounmap(dev->pdev, ast->regs);
	kfree(ast);
	return 0;
}

static void ec_bhf_remove(struct pci_dev *dev)
{
	struct net_device *net_dev = pci_get_drvdata(dev);
	struct ec_bhf_priv *priv = netdev_priv(net_dev);

	unregister_netdev(net_dev);
	free_netdev(net_dev);

	pci_iounmap(dev, priv->dma_io);
	pci_iounmap(dev, priv->io);
	pci_release_regions(dev);
	pci_clear_master(dev);
	pci_disable_device(dev);
}

void virtio_pci_legacy_remove(struct virtio_pci_device *vp_dev)
{
	struct pci_dev *pci_dev = vp_dev->pci_dev;

	pci_iounmap(pci_dev, vp_dev->ioaddr);
	pci_release_region(pci_dev, 0);
}

/* Special reset function for Marathon CAN-bus-PCIe card */
static void plx_pci_reset_marathon_pcie(struct pci_dev *pdev)
{
	void __iomem *addr;
	void __iomem *reset_addr;
	int i;

	plx9056_pci_reset_common(pdev);

	for (i = 0; i < 2; i++) {
		struct plx_pci_channel_map *chan_map =
			&plx_pci_card_info_marathon_pcie.chan_map_tbl[i];
		addr = pci_iomap(pdev, chan_map->bar, chan_map->size);
		if (!addr) {
			dev_err(&pdev->dev, "Failed to remap reset "
				"space %d (BAR%d)\n", i, chan_map->bar);
		} else {
			/* reset the SJA1000 chip */
			#define MARATHON_PCIE_RESET_OFFSET 32
			reset_addr = addr + chan_map->offset +
			             MARATHON_PCIE_RESET_OFFSET;
			iowrite8(0x1, reset_addr);
			udelay(100);
			pci_iounmap(pdev, addr);
		}
	}
}

static int marvell_pata_active(struct pci_dev *pdev)
{
	int i;
	u32 devices;
	void __iomem *barp;

	/* We don't yet know how to do this for other devices */
	if (pdev->device != 0x6145)
		return 1;

	barp = pci_iomap(pdev, 5, 0x10);
	if (barp == NULL)
		return -ENOMEM;

	printk("BAR5:");
	for(i = 0; i <= 0x0F; i++)
		printk("%02X:%02X ", i, ioread8(barp + i));
	printk("\n");

	devices = ioread32(barp + 0x0C);
	pci_iounmap(pdev, barp);

	if (devices & 0x10)
		return 1;
	return 0;
}

/* Unmap the framebuffer from the core and release the memory */
static void mga_vram_fini(struct mga_device *mdev)
{
	pci_iounmap(mdev->dev->pdev, mdev->rmmio);
	mdev->rmmio = NULL;
	if (mdev->mc.vram_base)
		release_mem_region(mdev->mc.vram_base, mdev->mc.vram_window);
}

static void __devexit orinoco_plx_remove_one(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct orinoco_private *priv = netdev_priv(dev);
	struct orinoco_pci_card *card = priv->card;

	unregister_netdev(dev);
	free_irq(pdev->irq, dev);
	pci_set_drvdata(pdev, NULL);
	free_orinocodev(dev);
	pci_iounmap(pdev, priv->hw.iobase);
	pci_iounmap(pdev, card->attr_io);
	pci_iounmap(pdev, card->bridge_io);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
}

static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
{
	struct ata_port *ap = link->ap;
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	u32 devices;
	void __iomem *barp;
	int i;

	/* Check if our port is enabled */

	barp = pci_iomap(pdev, 5, 0x10);
	if (barp == NULL)
		return -ENOMEM;
	printk("BAR5:");
	for(i = 0; i <= 0x0F; i++)
		printk("%02X:%02X ", i, ioread8(barp + i));
	printk("\n");

	devices = ioread32(barp + 0x0C);
	pci_iounmap(pdev, barp);

	if ((pdev->device == 0x6145) && (ap->port_no == 0) &&
	    (!(devices & 0x10)))	/* PATA enable ? */
		return -ENOENT;

	return ata_std_prereset(link, deadline);
}

static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
{
	struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
	int i;

	adf_dev_shutdown(accel_dev);

	for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
		struct adf_bar *bar = &accel_pci_dev->pci_bars[i];

		if (bar->virt_addr)
			pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
	}

	if (accel_dev->hw_device) {
		switch (accel_dev->hw_device->pci_dev_id) {
		case ADF_DH895XCC_PCI_DEVICE_ID:
			adf_clean_hw_data_dh895xcc(accel_dev->hw_device);
			break;
		default:
			break;
		}
		kfree(accel_dev->hw_device);
	}
	adf_cfg_dev_remove(accel_dev);
	debugfs_remove(accel_dev->debugfs_dir);
	adf_devmgr_rm_dev(accel_dev);
	pci_release_regions(accel_pci_dev->pci_dev);
	pci_disable_device(accel_pci_dev->pci_dev);
	kfree(accel_dev);
}

/* Map the framebuffer from the card and configure the core */
static int mga_vram_init(struct mga_device *mdev)
{
	void __iomem *mem;
	struct apertures_struct *aper = alloc_apertures(1);
	if (!aper)
		return -ENOMEM;

	/* BAR 0 is VRAM */
	mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
	mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);

	aper->ranges[0].base = mdev->mc.vram_base;
	aper->ranges[0].size = mdev->mc.vram_window;

	remove_conflicting_framebuffers(aper, "mgafb", true);
	kfree(aper);

	if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window,
				"mgadrmfb_vram")) {
		DRM_ERROR("can't reserve VRAM\n");
		return -ENXIO;
	}

	mem = pci_iomap(mdev->dev->pdev, 0, 0);

	mdev->mc.vram_size = mga_probe_vram(mdev, mem);

	pci_iounmap(mdev->dev->pdev, mem);

	return 0;
}