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iommu/vt-d: Remove aux-domain related callbacks

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The aux-domain related callbacks are not called in the tree. Remove them
to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20220216025249.3459465-4-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2022-02-16 10:52:43 +08:00 committed by Joerg Roedel
parent 0c9f178778
commit 241469685d
3 changed files with 3 additions and 326 deletions
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3
drivers/iommu/intel/debugfs.c
View File

@ -351,8 +351,7 @@ static int show_device_domain_translation(struct device *dev, void *data)
if (!domain)
return 0;
seq_printf(m, "Device %s with pasid %d @0x%llx\n",
dev_name(dev), domain->default_pasid,
seq_printf(m, "Device %s @0x%llx\n", dev_name(dev),
(u64)virt_to_phys(domain->pgd));
seq_puts(m, "IOVA_PFN\t\tPML5E\t\t\tPML4E\t\t\tPDPE\t\t\tPDE\t\t\tPTE\n");

309
drivers/iommu/intel/iommu.c
View File

@ -1573,18 +1573,6 @@ static void domain_update_iotlb(struct dmar_domain *domain)
break;
}
if (!has_iotlb_device) {
struct subdev_domain_info *sinfo;
list_for_each_entry(sinfo, &domain->subdevices, link_domain) {
info = get_domain_info(sinfo->pdev);
if (info && info->ats_enabled) {
has_iotlb_device = true;
break;
}
}
}
domain->has_iotlb_device = has_iotlb_device;
}
@ -1682,7 +1670,6 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
{
unsigned long flags;
struct device_domain_info *info;
struct subdev_domain_info *sinfo;
if (!domain->has_iotlb_device)
return;
@ -1691,27 +1678,9 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
list_for_each_entry(info, &domain->devices, link)
__iommu_flush_dev_iotlb(info, addr, mask);
list_for_each_entry(sinfo, &domain->subdevices, link_domain) {
info = get_domain_info(sinfo->pdev);
__iommu_flush_dev_iotlb(info, addr, mask);
}
spin_unlock_irqrestore(&device_domain_lock, flags);
}
static void domain_flush_piotlb(struct intel_iommu *iommu,
struct dmar_domain *domain,
u64 addr, unsigned long npages, bool ih)
{
u16 did = domain->iommu_did[iommu->seq_id];
if (domain->default_pasid)
qi_flush_piotlb(iommu, did, domain->default_pasid,
addr, npages, ih);
if (!list_empty(&domain->devices))
qi_flush_piotlb(iommu, did, PASID_RID2PASID, addr, npages, ih);
}
static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
struct dmar_domain *domain,
unsigned long pfn, unsigned int pages,
@ -1727,7 +1696,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
ih = 1 << 6;
if (domain_use_first_level(domain)) {
domain_flush_piotlb(iommu, domain, addr, pages, ih);
qi_flush_piotlb(iommu, did, PASID_RID2PASID, addr, pages, ih);
} else {
/*
* Fallback to domain selective flush if no PSI support or
@ -1776,7 +1745,7 @@ static void intel_flush_iotlb_all(struct iommu_domain *domain)
u16 did = dmar_domain->iommu_did[iommu->seq_id];
if (domain_use_first_level(dmar_domain))
domain_flush_piotlb(iommu, dmar_domain, 0, -1, 0);
qi_flush_piotlb(iommu, did, PASID_RID2PASID, 0, -1, 0);
else
iommu->flush.flush_iotlb(iommu, did, 0, 0,
DMA_TLB_DSI_FLUSH);
@ -1983,7 +1952,6 @@ static struct dmar_domain *alloc_domain(unsigned int type)
domain->flags |= DOMAIN_FLAG_USE_FIRST_LEVEL;
domain->has_iotlb_device = false;
INIT_LIST_HEAD(&domain->devices);
INIT_LIST_HEAD(&domain->subdevices);
return domain;
}
@ -2676,8 +2644,6 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
info->domain = domain;
info->iommu = iommu;
info->pasid_table = NULL;
info->auxd_enabled = 0;
INIT_LIST_HEAD(&info->subdevices);
if (dev && dev_is_pci(dev)) {
struct pci_dev *pdev = to_pci_dev(info->dev);
@ -4637,183 +4603,6 @@ static void intel_iommu_domain_free(struct iommu_domain *domain)
domain_exit(to_dmar_domain(domain));
}
/*
* Check whether a @domain could be attached to the @dev through the
* aux-domain attach/detach APIs.
*/
static inline bool
is_aux_domain(struct device *dev, struct iommu_domain *domain)
{
struct device_domain_info *info = get_domain_info(dev);
return info && info->auxd_enabled &&
domain->type == IOMMU_DOMAIN_UNMANAGED;
}
static inline struct subdev_domain_info *
lookup_subdev_info(struct dmar_domain *domain, struct device *dev)
{
struct subdev_domain_info *sinfo;
if (!list_empty(&domain->subdevices)) {
list_for_each_entry(sinfo, &domain->subdevices, link_domain) {
if (sinfo->pdev == dev)
return sinfo;
}
}
return NULL;
}
static int auxiliary_link_device(struct dmar_domain *domain,
struct device *dev)
{
struct device_domain_info *info = get_domain_info(dev);
struct subdev_domain_info *sinfo = lookup_subdev_info(domain, dev);
assert_spin_locked(&device_domain_lock);
if (WARN_ON(!info))
return -EINVAL;
if (!sinfo) {
sinfo = kzalloc(sizeof(*sinfo), GFP_ATOMIC);
if (!sinfo)
return -ENOMEM;
sinfo->domain = domain;
sinfo->pdev = dev;
list_add(&sinfo->link_phys, &info->subdevices);
list_add(&sinfo->link_domain, &domain->subdevices);
}
return ++sinfo->users;
}
static int auxiliary_unlink_device(struct dmar_domain *domain,
struct device *dev)
{
struct device_domain_info *info = get_domain_info(dev);
struct subdev_domain_info *sinfo = lookup_subdev_info(domain, dev);
int ret;
assert_spin_locked(&device_domain_lock);
if (WARN_ON(!info || !sinfo || sinfo->users <= 0))
return -EINVAL;
ret = --sinfo->users;
if (!ret) {
list_del(&sinfo->link_phys);
list_del(&sinfo->link_domain);
kfree(sinfo);
}
return ret;
}
static int aux_domain_add_dev(struct dmar_domain *domain,
struct device *dev)
{
int ret;
unsigned long flags;
struct intel_iommu *iommu;
iommu = device_to_iommu(dev, NULL, NULL);
if (!iommu)
return -ENODEV;
if (domain->default_pasid <= 0) {
u32 pasid;
/* No private data needed for the default pasid */
pasid = ioasid_alloc(NULL, PASID_MIN,
pci_max_pasids(to_pci_dev(dev)) - 1,
NULL);
if (pasid == INVALID_IOASID) {
pr_err("Can't allocate default pasid\n");
return -ENODEV;
}
domain->default_pasid = pasid;
}
spin_lock_irqsave(&device_domain_lock, flags);
ret = auxiliary_link_device(domain, dev);
if (ret <= 0)
goto link_failed;
/*
* Subdevices from the same physical device can be attached to the
* same domain. For such cases, only the first subdevice attachment
* needs to go through the full steps in this function. So if ret >
* 1, just goto out.
*/
if (ret > 1)
goto out;
/*
* iommu->lock must be held to attach domain to iommu and setup the
* pasid entry for second level translation.
*/
spin_lock(&iommu->lock);
ret = domain_attach_iommu(domain, iommu);
if (ret)
goto attach_failed;
/* Setup the PASID entry for mediated devices: */
if (domain_use_first_level(domain))
ret = domain_setup_first_level(iommu, domain, dev,
domain->default_pasid);
else
ret = intel_pasid_setup_second_level(iommu, domain, dev,
domain->default_pasid);
if (ret)
goto table_failed;
spin_unlock(&iommu->lock);
out:
spin_unlock_irqrestore(&device_domain_lock, flags);
return 0;
table_failed:
domain_detach_iommu(domain, iommu);
attach_failed:
spin_unlock(&iommu->lock);
auxiliary_unlink_device(domain, dev);
link_failed:
spin_unlock_irqrestore(&device_domain_lock, flags);
if (list_empty(&domain->subdevices) && domain->default_pasid > 0)
ioasid_put(domain->default_pasid);
return ret;
}
static void aux_domain_remove_dev(struct dmar_domain *domain,
struct device *dev)
{
struct device_domain_info *info;
struct intel_iommu *iommu;
unsigned long flags;
if (!is_aux_domain(dev, &domain->domain))
return;
spin_lock_irqsave(&device_domain_lock, flags);
info = get_domain_info(dev);
iommu = info->iommu;
if (!auxiliary_unlink_device(domain, dev)) {
spin_lock(&iommu->lock);
intel_pasid_tear_down_entry(iommu, dev,
domain->default_pasid, false);
domain_detach_iommu(domain, iommu);
spin_unlock(&iommu->lock);
}
spin_unlock_irqrestore(&device_domain_lock, flags);
if (list_empty(&domain->subdevices) && domain->default_pasid > 0)
ioasid_put(domain->default_pasid);
}
static int prepare_domain_attach_device(struct iommu_domain *domain,
struct device *dev)
{
@ -4866,9 +4655,6 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
return -EPERM;
}
if (is_aux_domain(dev, domain))
return -EPERM;
/* normally dev is not mapped */
if (unlikely(domain_context_mapped(dev))) {
struct dmar_domain *old_domain;
@ -4885,33 +4671,12 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
return domain_add_dev_info(to_dmar_domain(domain), dev);
}
static int intel_iommu_aux_attach_device(struct iommu_domain *domain,
struct device *dev)
{
int ret;
if (!is_aux_domain(dev, domain))
return -EPERM;
ret = prepare_domain_attach_device(domain, dev);
if (ret)
return ret;
return aux_domain_add_dev(to_dmar_domain(domain), dev);
}
static void intel_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
dmar_remove_one_dev_info(dev);
}
static void intel_iommu_aux_detach_device(struct iommu_domain *domain,
struct device *dev)
{
aux_domain_remove_dev(to_dmar_domain(domain), dev);
}
static int intel_iommu_map(struct iommu_domain *domain,
unsigned long iova, phys_addr_t hpa,
size_t size, int iommu_prot, gfp_t gfp)
@ -5205,46 +4970,6 @@ static struct iommu_group *intel_iommu_device_group(struct device *dev)
return generic_device_group(dev);
}
static int intel_iommu_enable_auxd(struct device *dev)
{
struct device_domain_info *info;
struct intel_iommu *iommu;
unsigned long flags;
int ret;
iommu = device_to_iommu(dev, NULL, NULL);
if (!iommu || dmar_disabled)
return -EINVAL;
if (!sm_supported(iommu) || !pasid_supported(iommu))
return -EINVAL;
ret = intel_iommu_enable_pasid(iommu, dev);
if (ret)
return -ENODEV;
spin_lock_irqsave(&device_domain_lock, flags);
info = get_domain_info(dev);
info->auxd_enabled = 1;
spin_unlock_irqrestore(&device_domain_lock, flags);
return 0;
}
static int intel_iommu_disable_auxd(struct device *dev)
{
struct device_domain_info *info;
unsigned long flags;
spin_lock_irqsave(&device_domain_lock, flags);
info = get_domain_info(dev);
if (!WARN_ON(!info))
info->auxd_enabled = 0;
spin_unlock_irqrestore(&device_domain_lock, flags);
return 0;
}
static int intel_iommu_enable_sva(struct device *dev)
{
struct device_domain_info *info = get_domain_info(dev);
@ -5301,9 +5026,6 @@ static int
intel_iommu_dev_enable_feat(struct device *dev, enum iommu_dev_features feat)
{
switch (feat) {
case IOMMU_DEV_FEAT_AUX:
return intel_iommu_enable_auxd(dev);
case IOMMU_DEV_FEAT_IOPF:
return intel_iommu_enable_iopf(dev);
@ -5319,9 +5041,6 @@ static int
intel_iommu_dev_disable_feat(struct device *dev, enum iommu_dev_features feat)
{
switch (feat) {
case IOMMU_DEV_FEAT_AUX:
return intel_iommu_disable_auxd(dev);
case IOMMU_DEV_FEAT_IOPF:
return 0;
@ -5333,26 +5052,6 @@ intel_iommu_dev_disable_feat(struct device *dev, enum iommu_dev_features feat)
}
}
static bool
intel_iommu_dev_feat_enabled(struct device *dev, enum iommu_dev_features feat)
{
struct device_domain_info *info = get_domain_info(dev);
if (feat == IOMMU_DEV_FEAT_AUX)
return scalable_mode_support() && info && info->auxd_enabled;
return false;
}
static int
intel_iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
{
struct dmar_domain *dmar_domain = to_dmar_domain(domain);
return dmar_domain->default_pasid > 0 ?
dmar_domain->default_pasid : -EINVAL;
}
static bool intel_iommu_is_attach_deferred(struct iommu_domain *domain,
struct device *dev)
{
@ -5397,9 +5096,6 @@ const struct iommu_ops intel_iommu_ops = {
.domain_free = intel_iommu_domain_free,
.attach_dev = intel_iommu_attach_device,
.detach_dev = intel_iommu_detach_device,
.aux_attach_dev = intel_iommu_aux_attach_device,
.aux_detach_dev = intel_iommu_aux_detach_device,
.aux_get_pasid = intel_iommu_aux_get_pasid,
.map_pages = intel_iommu_map_pages,
.unmap_pages = intel_iommu_unmap_pages,
.iotlb_sync_map = intel_iommu_iotlb_sync_map,
@ -5412,7 +5108,6 @@ const struct iommu_ops intel_iommu_ops = {
.get_resv_regions = intel_iommu_get_resv_regions,
.put_resv_regions = generic_iommu_put_resv_regions,
.device_group = intel_iommu_device_group,
.dev_feat_enabled = intel_iommu_dev_feat_enabled,
.dev_enable_feat = intel_iommu_dev_enable_feat,
.dev_disable_feat = intel_iommu_dev_disable_feat,
.is_attach_deferred = intel_iommu_is_attach_deferred,

17
include/linux/intel-iommu.h
View File

@ -542,7 +542,6 @@ struct dmar_domain {
u8 iommu_snooping: 1; /* indicate snooping control feature */
struct list_head devices; /* all devices' list */
struct list_head subdevices; /* all subdevices' list */
struct iova_domain iovad; /* iova's that belong to this domain */
struct dma_pte *pgd; /* virtual address */
@ -557,11 +556,6 @@ struct dmar_domain {
2 == 1GiB, 3 == 512GiB, 4 == 1TiB */
u64 max_addr; /* maximum mapped address */
u32 default_pasid; /*
* The default pasid used for non-SVM
* traffic on mediated devices.
*/
struct iommu_domain domain; /* generic domain data structure for
iommu core */
};
@ -614,21 +608,11 @@ struct intel_iommu {
void *perf_statistic;
};
/* Per subdevice private data */
struct subdev_domain_info {
struct list_head link_phys; /* link to phys device siblings */
struct list_head link_domain; /* link to domain siblings */
struct device *pdev; /* physical device derived from */
struct dmar_domain *domain; /* aux-domain */
int users; /* user count */
};
/* PCI domain-device relationship */
struct device_domain_info {
struct list_head link; /* link to domain siblings */
struct list_head global; /* link to global list */
struct list_head table; /* link to pasid table */
struct list_head subdevices; /* subdevices sibling */
u32 segment; /* PCI segment number */
u8 bus; /* PCI bus number */
u8 devfn; /* PCI devfn number */
@ -639,7 +623,6 @@ struct device_domain_info {
u8 pri_enabled:1;
u8 ats_supported:1;
u8 ats_enabled:1;
u8 auxd_enabled:1; /* Multiple domains per device */
u8 ats_qdep;
struct device *dev; /* it's NULL for PCIe-to-PCI bridge */
struct intel_iommu *iommu; /* IOMMU used by this device */