diff options
| -rw-r--r-- | drivers/acpi/arm64/iort.c | 74 | ||||
| -rw-r--r-- | drivers/acpi/scan.c | 73 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 3 | ||||
| -rw-r--r-- | include/linux/acpi_iort.h | 8 |
4 files changed, 86 insertions, 72 deletions
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index a940be1cf2af..487d1095030d 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -806,23 +806,6 @@ static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev) return NULL; } -static inline const struct iommu_ops *iort_fwspec_iommu_ops(struct device *dev) -{ - struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - - return (fwspec && fwspec->ops) ? fwspec->ops : NULL; -} - -static inline int iort_add_device_replay(struct device *dev) -{ - int err = 0; - - if (dev->bus && !device_iommu_mapped(dev)) - err = iommu_probe_device(dev); - - return err; -} - /** * iort_iommu_msi_get_resv_regions - Reserved region driver helper * @dev: Device from iommu_get_resv_regions() @@ -900,18 +883,6 @@ static inline bool iort_iommu_driver_enabled(u8 type) } } -static int arm_smmu_iort_xlate(struct device *dev, u32 streamid, - struct fwnode_handle *fwnode, - const struct iommu_ops *ops) -{ - int ret = iommu_fwspec_init(dev, fwnode, ops); - - if (!ret) - ret = iommu_fwspec_add_ids(dev, &streamid, 1); - - return ret; -} - static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node) { struct acpi_iort_root_complex *pci_rc; @@ -946,7 +917,7 @@ static int iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node, return iort_iommu_driver_enabled(node->type) ? -EPROBE_DEFER : -ENODEV; - return arm_smmu_iort_xlate(dev, streamid, iort_fwnode, ops); + return acpi_iommu_fwspec_init(dev, streamid, iort_fwnode, ops); } struct iort_pci_alias_info { @@ -1020,24 +991,13 @@ static int iort_nc_iommu_map_id(struct device *dev, * @dev: device to configure * @id_in: optional input id const value pointer * - * Returns: iommu_ops pointer on configuration success - * NULL on configuration failure + * Returns: 0 on success, <0 on failure */ -const struct iommu_ops *iort_iommu_configure_id(struct device *dev, - const u32 *id_in) +int iort_iommu_configure_id(struct device *dev, const u32 *id_in) { struct acpi_iort_node *node; - const struct iommu_ops *ops; int err = -ENODEV; - /* - * If we already translated the fwspec there - * is nothing left to do, return the iommu_ops. - */ - ops = iort_fwspec_iommu_ops(dev); - if (ops) - return ops; - if (dev_is_pci(dev)) { struct iommu_fwspec *fwspec; struct pci_bus *bus = to_pci_dev(dev)->bus; @@ -1046,7 +1006,7 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev, node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, iort_match_node_callback, &bus->dev); if (!node) - return NULL; + return -ENODEV; info.node = node; err = pci_for_each_dma_alias(to_pci_dev(dev), @@ -1059,7 +1019,7 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev, node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT, iort_match_node_callback, dev); if (!node) - return NULL; + return -ENODEV; err = id_in ? iort_nc_iommu_map_id(dev, node, id_in) : iort_nc_iommu_map(dev, node); @@ -1068,32 +1028,14 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev, iort_named_component_init(dev, node); } - /* - * If we have reason to believe the IOMMU driver missed the initial - * add_device callback for dev, replay it to get things in order. - */ - if (!err) { - ops = iort_fwspec_iommu_ops(dev); - err = iort_add_device_replay(dev); - } - - /* Ignore all other errors apart from EPROBE_DEFER */ - if (err == -EPROBE_DEFER) { - ops = ERR_PTR(err); - } else if (err) { - dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); - ops = NULL; - } - - return ops; + return err; } #else int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) { return 0; } -const struct iommu_ops *iort_iommu_configure_id(struct device *dev, - const u32 *input_id) -{ return NULL; } +int iort_iommu_configure_id(struct device *dev, const u32 *input_id) +{ return -ENODEV; } #endif static int nc_dma_get_range(struct device *dev, u64 *size) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index ea613df8f913..2a2e690040e9 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -9,6 +9,7 @@ #include <linux/kernel.h> #include <linux/acpi.h> #include <linux/acpi_iort.h> +#include <linux/iommu.h> #include <linux/signal.h> #include <linux/kthread.h> #include <linux/dmi.h> @@ -1520,6 +1521,76 @@ int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset, return ret >= 0 ? 0 : ret; } +#ifdef CONFIG_IOMMU_API +int acpi_iommu_fwspec_init(struct device *dev, u32 id, + struct fwnode_handle *fwnode, + const struct iommu_ops *ops) +{ + int ret = iommu_fwspec_init(dev, fwnode, ops); + + if (!ret) + ret = iommu_fwspec_add_ids(dev, &id, 1); + + return ret; +} + +static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev) +{ + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + + return fwspec ? fwspec->ops : NULL; +} + +static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, + const u32 *id_in) +{ + int err; + const struct iommu_ops *ops; + + /* + * If we already translated the fwspec there is nothing left to do, + * return the iommu_ops. + */ + ops = acpi_iommu_fwspec_ops(dev); + if (ops) + return ops; + + err = iort_iommu_configure_id(dev, id_in); + + /* + * If we have reason to believe the IOMMU driver missed the initial + * iommu_probe_device() call for dev, replay it to get things in order. + */ + if (!err && dev->bus && !device_iommu_mapped(dev)) + err = iommu_probe_device(dev); + + /* Ignore all other errors apart from EPROBE_DEFER */ + if (err == -EPROBE_DEFER) { + return ERR_PTR(err); + } else if (err) { + dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); + return NULL; + } + return acpi_iommu_fwspec_ops(dev); +} + +#else /* !CONFIG_IOMMU_API */ + +int acpi_iommu_fwspec_init(struct device *dev, u32 id, + struct fwnode_handle *fwnode, + const struct iommu_ops *ops) +{ + return -ENODEV; +} + +static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, + const u32 *id_in) +{ + return NULL; +} + +#endif /* !CONFIG_IOMMU_API */ + /** * acpi_dma_configure_id - Set-up DMA configuration for the device. * @dev: The pointer to the device @@ -1539,7 +1610,7 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, acpi_arch_dma_setup(dev, &dma_addr, &size); - iommu = iort_iommu_configure_id(dev, input_id); + iommu = acpi_iommu_configure_id(dev, input_id); if (PTR_ERR(iommu) == -EPROBE_DEFER) return -EPROBE_DEFER; diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 3a82faac5767..41f092a269f6 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -588,6 +588,9 @@ struct acpi_pci_root { bool acpi_dma_supported(struct acpi_device *adev); enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); +int acpi_iommu_fwspec_init(struct device *dev, u32 id, + struct fwnode_handle *fwnode, + const struct iommu_ops *ops); int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset, u64 *size); int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index f7f054833afd..f1f0842a2cb2 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -35,8 +35,7 @@ void acpi_configure_pmsi_domain(struct device *dev); int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); /* IOMMU interface */ int iort_dma_get_ranges(struct device *dev, u64 *size); -const struct iommu_ops *iort_iommu_configure_id(struct device *dev, - const u32 *id_in); +int iort_iommu_configure_id(struct device *dev, const u32 *id_in); int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head); phys_addr_t acpi_iort_dma_get_max_cpu_address(void); #else @@ -50,9 +49,8 @@ static inline void acpi_configure_pmsi_domain(struct device *dev) { } /* IOMMU interface */ static inline int iort_dma_get_ranges(struct device *dev, u64 *size) { return -ENODEV; } -static inline const struct iommu_ops *iort_iommu_configure_id( - struct device *dev, const u32 *id_in) -{ return NULL; } +static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in) +{ return -ENODEV; } static inline int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) { return 0; } |