| Message ID | 3-v1-f82a05539a64+5042-iommu_fwspec_p2_jgg@nvidia.com |
|---|---|
| State | New |
| Headers | show |
| Series | Make a new API for drivers to use to get their FW | expand |
On Thu, Nov 30, 2023 at 2:11 AM Jason Gunthorpe <jgg@nvidia.com> wrote: > > Similar to of_iommu_for_each_id() this parses the IORT ACPI description > and invokes a function over each entry in the table. > > Have iort_iommu_configure_id() use the new function to call > iort_iommu_xlate(). > > Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > --- > drivers/acpi/arm64/iort.c | 118 ++++++++++++++++++++++++-------------- > include/linux/acpi_iort.h | 12 ++++ > 2 files changed, 86 insertions(+), 44 deletions(-) > > diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c > index bdaf9256870d92..5c9b4c23f96a87 100644 > --- a/drivers/acpi/arm64/iort.c > +++ b/drivers/acpi/arm64/iort.c > @@ -1218,9 +1218,10 @@ static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node) > return pci_rc->ats_attribute & ACPI_IORT_ATS_SUPPORTED; > } > > -static int iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node, > - u32 streamid) > +static int iort_iommu_xlate(struct acpi_iort_node *node, u32 streamid, > + void *info) > { > + struct device *dev = info; > const struct iommu_ops *ops; > struct fwnode_handle *iort_fwnode; > > @@ -1250,9 +1251,11 @@ static int iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node, > struct iort_pci_alias_info { > struct device *dev; > struct acpi_iort_node *node; > + iort_for_each_fn fn; > + void *info; > }; > > -static int iort_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data) > +static int __for_each_pci_alias(struct pci_dev *pdev, u16 alias, void *data) > { > struct iort_pci_alias_info *info = data; > struct acpi_iort_node *parent; > @@ -1260,7 +1263,7 @@ static int iort_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data) > > parent = iort_node_map_id(info->node, alias, &streamid, > IORT_IOMMU_TYPE); > - return iort_iommu_xlate(info->dev, parent, streamid); > + return info->fn(parent, streamid, info->info); > } > > static void iort_named_component_init(struct device *dev, > @@ -1280,7 +1283,8 @@ static void iort_named_component_init(struct device *dev, > dev_warn(dev, "Could not add device properties\n"); > } > > -static int iort_nc_iommu_map(struct device *dev, struct acpi_iort_node *node) > +static int __for_each_platform(struct acpi_iort_node *node, iort_for_each_fn fn, > + void *info) > { > struct acpi_iort_node *parent; > int err = -ENODEV, i = 0; > @@ -1293,27 +1297,71 @@ static int iort_nc_iommu_map(struct device *dev, struct acpi_iort_node *node) > i++); > > if (parent) > - err = iort_iommu_xlate(dev, parent, streamid); > + err = fn(parent, streamid, info); > } while (parent && !err); > > return err; > } > > -static int iort_nc_iommu_map_id(struct device *dev, > - struct acpi_iort_node *node, > - const u32 *in_id) > +int iort_iommu_for_each_id(struct device *dev, const u32 *id_in, > + struct iort_params *params, iort_for_each_fn fn, > + void *info) > { > - struct acpi_iort_node *parent; > - u32 streamid; > + struct acpi_iort_named_component *nc; > + struct acpi_iort_node *node; > + int err = -ENODEV; > > - parent = iort_node_map_id(node, *in_id, &streamid, IORT_IOMMU_TYPE); > - if (parent) > - return iort_iommu_xlate(dev, parent, streamid); > + memset(params, 0, sizeof(*params)); > + if (dev_is_pci(dev)) { > + struct pci_bus *bus = to_pci_dev(dev)->bus; > + struct iort_pci_alias_info pci_info = { .dev = dev, > + .fn = fn, > + .info = info }; > > - return -ENODEV; > + node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, > + iort_match_node_callback, &bus->dev); > + if (!node) > + return -ENODEV; > + > + pci_info.node = node; > + err = pci_for_each_dma_alias(to_pci_dev(dev), > + __for_each_pci_alias, &pci_info); > + > + if (iort_pci_rc_supports_ats(node)) > + params->pci_rc_ats = true; > + return 0; > + } > + > + node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT, > + iort_match_node_callback, dev); > + if (!node) > + return -ENODEV; > + > + if (id_in) { > + struct acpi_iort_node *parent; > + u32 streamid; > + > + parent = iort_node_map_id(node, *id_in, &streamid, > + IORT_IOMMU_TYPE); > + if (!parent) > + return -ENODEV; > + err = fn(parent, streamid, info); > + } else { > + err = __for_each_platform(node, fn, info); > + } > + if (err) > + return err; > + > + nc = (struct acpi_iort_named_component *)node->node_data; > + params->pasid_num_bits = FIELD_GET(ACPI_IORT_NC_PASID_BITS, > + nc->node_flags); > + if (nc->node_flags & ACPI_IORT_NC_STALL_SUPPORTED) > + params->dma_can_stall = true; > + > + iort_named_component_init(dev, node); > + return 0; > } > > - > /** > * iort_iommu_configure_id - Set-up IOMMU configuration for a device. > * > @@ -1324,40 +1372,22 @@ static int iort_nc_iommu_map_id(struct device *dev, > */ > int iort_iommu_configure_id(struct device *dev, const u32 *id_in) > { > - struct acpi_iort_node *node; > - int err = -ENODEV; > + struct iort_params params; > + int err; > > - if (dev_is_pci(dev)) { > + err = iort_iommu_for_each_id(dev, id_in, ¶ms, &iort_iommu_xlate, > + dev); > + if (err) > + return err; > + > + if (params.pci_rc_ats) { > struct iommu_fwspec *fwspec; > - struct pci_bus *bus = to_pci_dev(dev)->bus; > - struct iort_pci_alias_info info = { .dev = dev }; > - > - node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, > - iort_match_node_callback, &bus->dev); > - if (!node) > - return -ENODEV; > - > - info.node = node; > - err = pci_for_each_dma_alias(to_pci_dev(dev), > - iort_pci_iommu_init, &info); > > fwspec = dev_iommu_fwspec_get(dev); > - if (fwspec && iort_pci_rc_supports_ats(node)) > + if (fwspec) > fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS; > - } else { > - node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT, > - iort_match_node_callback, dev); > - if (!node) > - return -ENODEV; > - > - err = id_in ? iort_nc_iommu_map_id(dev, node, id_in) : > - iort_nc_iommu_map(dev, node); > - > - if (!err) > - iort_named_component_init(dev, node); > } > - > - return err; > + return 0; > } > > #else > diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h > index 1cb65592c95dd3..5423abff9b6b09 100644 > --- a/include/linux/acpi_iort.h > +++ b/include/linux/acpi_iort.h > @@ -29,6 +29,18 @@ void iort_deregister_domain_token(int trans_id); > struct fwnode_handle *iort_find_domain_token(int trans_id); > int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); > > +struct iort_params { > + unsigned int pasid_num_bits; > + bool dma_can_stall : 1; > + bool pci_rc_ats : 1; > +}; > + > +typedef int (*iort_for_each_fn)(struct acpi_iort_node *iommu, u32 streamid, > + void *info); > +int iort_iommu_for_each_id(struct device *dev, const u32 *id_in, > + struct iort_params *params, iort_for_each_fn fn, > + void *info); > + > #ifdef CONFIG_ACPI_IORT > u32 iort_msi_map_id(struct device *dev, u32 id); > struct irq_domain *iort_get_device_domain(struct device *dev, u32 id, > -- > 2.42.0 >
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index bdaf9256870d92..5c9b4c23f96a87 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -1218,9 +1218,10 @@ static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node) return pci_rc->ats_attribute & ACPI_IORT_ATS_SUPPORTED; } -static int iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node, - u32 streamid) +static int iort_iommu_xlate(struct acpi_iort_node *node, u32 streamid, + void *info) { + struct device *dev = info; const struct iommu_ops *ops; struct fwnode_handle *iort_fwnode; @@ -1250,9 +1251,11 @@ static int iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node, struct iort_pci_alias_info { struct device *dev; struct acpi_iort_node *node; + iort_for_each_fn fn; + void *info; }; -static int iort_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data) +static int __for_each_pci_alias(struct pci_dev *pdev, u16 alias, void *data) { struct iort_pci_alias_info *info = data; struct acpi_iort_node *parent; @@ -1260,7 +1263,7 @@ static int iort_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data) parent = iort_node_map_id(info->node, alias, &streamid, IORT_IOMMU_TYPE); - return iort_iommu_xlate(info->dev, parent, streamid); + return info->fn(parent, streamid, info->info); } static void iort_named_component_init(struct device *dev, @@ -1280,7 +1283,8 @@ static void iort_named_component_init(struct device *dev, dev_warn(dev, "Could not add device properties\n"); } -static int iort_nc_iommu_map(struct device *dev, struct acpi_iort_node *node) +static int __for_each_platform(struct acpi_iort_node *node, iort_for_each_fn fn, + void *info) { struct acpi_iort_node *parent; int err = -ENODEV, i = 0; @@ -1293,27 +1297,71 @@ static int iort_nc_iommu_map(struct device *dev, struct acpi_iort_node *node) i++); if (parent) - err = iort_iommu_xlate(dev, parent, streamid); + err = fn(parent, streamid, info); } while (parent && !err); return err; } -static int iort_nc_iommu_map_id(struct device *dev, - struct acpi_iort_node *node, - const u32 *in_id) +int iort_iommu_for_each_id(struct device *dev, const u32 *id_in, + struct iort_params *params, iort_for_each_fn fn, + void *info) { - struct acpi_iort_node *parent; - u32 streamid; + struct acpi_iort_named_component *nc; + struct acpi_iort_node *node; + int err = -ENODEV; - parent = iort_node_map_id(node, *in_id, &streamid, IORT_IOMMU_TYPE); - if (parent) - return iort_iommu_xlate(dev, parent, streamid); + memset(params, 0, sizeof(*params)); + if (dev_is_pci(dev)) { + struct pci_bus *bus = to_pci_dev(dev)->bus; + struct iort_pci_alias_info pci_info = { .dev = dev, + .fn = fn, + .info = info }; - return -ENODEV; + node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, + iort_match_node_callback, &bus->dev); + if (!node) + return -ENODEV; + + pci_info.node = node; + err = pci_for_each_dma_alias(to_pci_dev(dev), + __for_each_pci_alias, &pci_info); + + if (iort_pci_rc_supports_ats(node)) + params->pci_rc_ats = true; + return 0; + } + + node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT, + iort_match_node_callback, dev); + if (!node) + return -ENODEV; + + if (id_in) { + struct acpi_iort_node *parent; + u32 streamid; + + parent = iort_node_map_id(node, *id_in, &streamid, + IORT_IOMMU_TYPE); + if (!parent) + return -ENODEV; + err = fn(parent, streamid, info); + } else { + err = __for_each_platform(node, fn, info); + } + if (err) + return err; + + nc = (struct acpi_iort_named_component *)node->node_data; + params->pasid_num_bits = FIELD_GET(ACPI_IORT_NC_PASID_BITS, + nc->node_flags); + if (nc->node_flags & ACPI_IORT_NC_STALL_SUPPORTED) + params->dma_can_stall = true; + + iort_named_component_init(dev, node); + return 0; } - /** * iort_iommu_configure_id - Set-up IOMMU configuration for a device. * @@ -1324,40 +1372,22 @@ static int iort_nc_iommu_map_id(struct device *dev, */ int iort_iommu_configure_id(struct device *dev, const u32 *id_in) { - struct acpi_iort_node *node; - int err = -ENODEV; + struct iort_params params; + int err; - if (dev_is_pci(dev)) { + err = iort_iommu_for_each_id(dev, id_in, ¶ms, &iort_iommu_xlate, + dev); + if (err) + return err; + + if (params.pci_rc_ats) { struct iommu_fwspec *fwspec; - struct pci_bus *bus = to_pci_dev(dev)->bus; - struct iort_pci_alias_info info = { .dev = dev }; - - node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, - iort_match_node_callback, &bus->dev); - if (!node) - return -ENODEV; - - info.node = node; - err = pci_for_each_dma_alias(to_pci_dev(dev), - iort_pci_iommu_init, &info); fwspec = dev_iommu_fwspec_get(dev); - if (fwspec && iort_pci_rc_supports_ats(node)) + if (fwspec) fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS; - } else { - node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT, - iort_match_node_callback, dev); - if (!node) - return -ENODEV; - - err = id_in ? iort_nc_iommu_map_id(dev, node, id_in) : - iort_nc_iommu_map(dev, node); - - if (!err) - iort_named_component_init(dev, node); } - - return err; + return 0; } #else diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index 1cb65592c95dd3..5423abff9b6b09 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -29,6 +29,18 @@ void iort_deregister_domain_token(int trans_id); struct fwnode_handle *iort_find_domain_token(int trans_id); int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); +struct iort_params { + unsigned int pasid_num_bits; + bool dma_can_stall : 1; + bool pci_rc_ats : 1; +}; + +typedef int (*iort_for_each_fn)(struct acpi_iort_node *iommu, u32 streamid, + void *info); +int iort_iommu_for_each_id(struct device *dev, const u32 *id_in, + struct iort_params *params, iort_for_each_fn fn, + void *info); + #ifdef CONFIG_ACPI_IORT u32 iort_msi_map_id(struct device *dev, u32 id); struct irq_domain *iort_get_device_domain(struct device *dev, u32 id,
Similar to of_iommu_for_each_id() this parses the IORT ACPI description and invokes a function over each entry in the table. Have iort_iommu_configure_id() use the new function to call iort_iommu_xlate(). Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> --- drivers/acpi/arm64/iort.c | 118 ++++++++++++++++++++++++-------------- include/linux/acpi_iort.h | 12 ++++ 2 files changed, 86 insertions(+), 44 deletions(-)