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iommu/amd: Implement add_device and remove_device
Implement these two iommu-ops call-backs to make use of the initialization and notifier features of the iommu core. Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel
parent
063071dff5
commit
aafd8ba0ca
@ -119,7 +119,7 @@ struct iommu_cmd {
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struct kmem_cache *amd_iommu_irq_cache;
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static void update_domain(struct protection_domain *domain);
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static int __init alloc_passthrough_domain(void);
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static int alloc_passthrough_domain(void);
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/****************************************************************************
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*
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@ -434,64 +434,15 @@ static void iommu_uninit_device(struct device *dev)
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/* Unlink from alias, it may change if another device is re-plugged */
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dev_data->alias_data = NULL;
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/* Remove dma-ops */
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dev->archdata.dma_ops = NULL;
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/*
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* We keep dev_data around for unplugged devices and reuse it when the
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* device is re-plugged - not doing so would introduce a ton of races.
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*/
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}
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void __init amd_iommu_uninit_devices(void)
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{
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struct iommu_dev_data *dev_data, *n;
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struct pci_dev *pdev = NULL;
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for_each_pci_dev(pdev) {
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if (!check_device(&pdev->dev))
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continue;
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iommu_uninit_device(&pdev->dev);
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}
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/* Free all of our dev_data structures */
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list_for_each_entry_safe(dev_data, n, &dev_data_list, dev_data_list)
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free_dev_data(dev_data);
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}
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int __init amd_iommu_init_devices(void)
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{
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struct pci_dev *pdev = NULL;
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int ret = 0;
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for_each_pci_dev(pdev) {
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if (!check_device(&pdev->dev))
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continue;
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ret = iommu_init_device(&pdev->dev);
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if (ret == -ENOTSUPP)
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iommu_ignore_device(&pdev->dev);
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else if (ret)
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goto out_free;
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}
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/*
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* Initialize IOMMU groups only after iommu_init_device() has
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* had a chance to populate any IVRS defined aliases.
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*/
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for_each_pci_dev(pdev) {
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if (check_device(&pdev->dev))
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init_iommu_group(&pdev->dev);
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}
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return 0;
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out_free:
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amd_iommu_uninit_devices();
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return ret;
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}
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#ifdef CONFIG_AMD_IOMMU_STATS
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/*
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@ -2402,81 +2353,79 @@ static struct protection_domain *domain_for_device(struct device *dev)
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return dom;
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}
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static int device_change_notifier(struct notifier_block *nb,
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unsigned long action, void *data)
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static int amd_iommu_add_device(struct device *dev)
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{
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struct dma_ops_domain *dma_domain;
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struct protection_domain *domain;
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struct iommu_dev_data *dev_data;
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struct device *dev = data;
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struct amd_iommu *iommu;
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unsigned long flags;
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u16 devid;
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int ret;
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if (!check_device(dev))
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if (!check_device(dev) || get_dev_data(dev))
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return 0;
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devid = get_device_id(dev);
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iommu = amd_iommu_rlookup_table[devid];
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devid = get_device_id(dev);
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iommu = amd_iommu_rlookup_table[devid];
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ret = iommu_init_device(dev);
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if (ret == -ENOTSUPP) {
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iommu_ignore_device(dev);
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goto out;
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}
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init_iommu_group(dev);
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dev_data = get_dev_data(dev);
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switch (action) {
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case BUS_NOTIFY_ADD_DEVICE:
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iommu_init_device(dev);
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init_iommu_group(dev);
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/*
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* dev_data is still NULL and
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* got initialized in iommu_init_device
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*/
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dev_data = get_dev_data(dev);
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if (iommu_pass_through || dev_data->iommu_v2) {
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dev_data->passthrough = true;
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attach_device(dev, pt_domain);
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break;
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}
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domain = domain_for_device(dev);
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/* allocate a protection domain if a device is added */
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dma_domain = find_protection_domain(devid);
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if (!dma_domain) {
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dma_domain = dma_ops_domain_alloc();
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if (!dma_domain)
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goto out;
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dma_domain->target_dev = devid;
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spin_lock_irqsave(&iommu_pd_list_lock, flags);
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list_add_tail(&dma_domain->list, &iommu_pd_list);
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spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
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}
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dev->archdata.dma_ops = &amd_iommu_dma_ops;
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break;
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case BUS_NOTIFY_REMOVED_DEVICE:
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iommu_uninit_device(dev);
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default:
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if (iommu_pass_through || dev_data->iommu_v2) {
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/* Make sure passthrough domain is allocated */
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alloc_passthrough_domain();
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dev_data->passthrough = true;
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attach_device(dev, pt_domain);
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goto out;
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}
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iommu_completion_wait(iommu);
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domain = domain_for_device(dev);
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/* allocate a protection domain if a device is added */
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dma_domain = find_protection_domain(devid);
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if (!dma_domain) {
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dma_domain = dma_ops_domain_alloc();
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if (!dma_domain)
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goto out;
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dma_domain->target_dev = devid;
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init_unity_mappings_for_device(dma_domain, devid);
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spin_lock_irqsave(&iommu_pd_list_lock, flags);
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list_add_tail(&dma_domain->list, &iommu_pd_list);
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spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
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}
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attach_device(dev, &dma_domain->domain);
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dev->archdata.dma_ops = &amd_iommu_dma_ops;
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out:
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iommu_completion_wait(iommu);
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return 0;
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}
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static struct notifier_block device_nb = {
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.notifier_call = device_change_notifier,
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};
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void amd_iommu_init_notifier(void)
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static void amd_iommu_remove_device(struct device *dev)
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{
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bus_register_notifier(&pci_bus_type, &device_nb);
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struct amd_iommu *iommu;
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u16 devid;
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if (!check_device(dev))
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return;
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devid = get_device_id(dev);
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iommu = amd_iommu_rlookup_table[devid];
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iommu_uninit_device(dev);
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iommu_completion_wait(iommu);
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}
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/*****************************************************************************
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@ -3018,54 +2967,6 @@ static int amd_iommu_dma_supported(struct device *dev, u64 mask)
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return check_device(dev);
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}
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/*
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* The function for pre-allocating protection domains.
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*
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* If the driver core informs the DMA layer if a driver grabs a device
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* we don't need to preallocate the protection domains anymore.
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* For now we have to.
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*/
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static void __init prealloc_protection_domains(void)
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{
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struct iommu_dev_data *dev_data;
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struct dma_ops_domain *dma_dom;
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struct pci_dev *dev = NULL;
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u16 devid;
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for_each_pci_dev(dev) {
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/* Do we handle this device? */
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if (!check_device(&dev->dev))
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continue;
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dev_data = get_dev_data(&dev->dev);
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if (!amd_iommu_force_isolation && dev_data->iommu_v2) {
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/* Make sure passthrough domain is allocated */
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alloc_passthrough_domain();
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dev_data->passthrough = true;
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attach_device(&dev->dev, pt_domain);
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pr_info("AMD-Vi: Using passthrough domain for device %s\n",
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dev_name(&dev->dev));
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}
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/* Is there already any domain for it? */
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if (domain_for_device(&dev->dev))
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continue;
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devid = get_device_id(&dev->dev);
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dma_dom = dma_ops_domain_alloc();
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if (!dma_dom)
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continue;
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init_unity_mappings_for_device(dma_dom, devid);
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dma_dom->target_dev = devid;
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attach_device(&dev->dev, &dma_dom->domain);
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list_add_tail(&dma_dom->list, &iommu_pd_list);
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}
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}
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static struct dma_map_ops amd_iommu_dma_ops = {
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.alloc = alloc_coherent,
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.free = free_coherent,
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@ -3131,11 +3032,6 @@ int __init amd_iommu_init_dma_ops(void)
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goto free_domains;
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}
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/*
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* Pre-allocate the protection domains for each device.
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*/
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prealloc_protection_domains();
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iommu_detected = 1;
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swiotlb = 0;
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@ -3228,7 +3124,7 @@ out_err:
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return NULL;
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}
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static int __init alloc_passthrough_domain(void)
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static int alloc_passthrough_domain(void)
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{
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if (pt_domain != NULL)
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return 0;
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@ -3470,6 +3366,8 @@ static const struct iommu_ops amd_iommu_ops = {
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.unmap = amd_iommu_unmap,
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.map_sg = default_iommu_map_sg,
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.iova_to_phys = amd_iommu_iova_to_phys,
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.add_device = amd_iommu_add_device,
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.remove_device = amd_iommu_remove_device,
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.get_dm_regions = amd_iommu_get_dm_regions,
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.put_dm_regions = amd_iommu_put_dm_regions,
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.pgsize_bitmap = AMD_IOMMU_PGSIZES,
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@ -226,6 +226,7 @@ static enum iommu_init_state init_state = IOMMU_START_STATE;
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static int amd_iommu_enable_interrupts(void);
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static int __init iommu_go_to_state(enum iommu_init_state state);
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static void init_device_table_dma(void);
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static inline void update_last_devid(u16 devid)
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{
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@ -1385,7 +1386,12 @@ static int __init amd_iommu_init_pci(void)
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break;
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}
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ret = amd_iommu_init_devices();
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init_device_table_dma();
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for_each_iommu(iommu)
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iommu_flush_all_caches(iommu);
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amd_iommu_init_api();
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print_iommu_info();
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@ -1825,8 +1831,6 @@ static bool __init check_ioapic_information(void)
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static void __init free_dma_resources(void)
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{
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amd_iommu_uninit_devices();
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free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
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get_order(MAX_DOMAIN_ID/8));
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@ -2019,27 +2023,10 @@ static bool detect_ivrs(void)
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static int amd_iommu_init_dma(void)
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{
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struct amd_iommu *iommu;
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int ret;
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if (iommu_pass_through)
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ret = amd_iommu_init_passthrough();
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return amd_iommu_init_passthrough();
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else
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ret = amd_iommu_init_dma_ops();
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if (ret)
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return ret;
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init_device_table_dma();
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for_each_iommu(iommu)
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iommu_flush_all_caches(iommu);
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amd_iommu_init_api();
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amd_iommu_init_notifier();
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return 0;
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return amd_iommu_init_dma_ops();
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}
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/****************************************************************************
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