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| author | Nick Terrell <terrelln@fb.com> | 2022-12-13 16:21:55 -0800 |
|---|---|---|
| committer | Nick Terrell <terrelln@fb.com> | 2022-12-13 16:21:55 -0800 |
| commit | 4f2c0a4acffbec01079c28f839422e64ddeff004 (patch) | |
| tree | 06ada4a8a6d94a94c93944806041b8c994cebfc5 /include/linux/platform_device.h | |
| parent | 88a309465b3f05a100c3b81966982c0f9f5d23a6 (diff) | |
| parent | 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 (diff) | |
| download | lwn-4f2c0a4acffbec01079c28f839422e64ddeff004.tar.gz lwn-4f2c0a4acffbec01079c28f839422e64ddeff004.zip | |
Merge branch 'main' into zstd-linus
Diffstat (limited to 'include/linux/platform_device.h')
| -rw-r--r-- | include/linux/platform_device.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 7c96f169d274..b0d5a253156e 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -31,7 +31,11 @@ struct platform_device { struct resource *resource; const struct platform_device_id *id_entry; - char *driver_override; /* Driver name to force a match */ + /* + * Driver name to force a match. Do not set directly, because core + * frees it. Use driver_set_override() to set or clear it. + */ + const char *driver_override; /* MFD cell pointer */ struct mfd_cell *mfd_cell; @@ -210,6 +214,14 @@ struct platform_driver { struct device_driver driver; const struct platform_device_id *id_table; bool prevent_deferred_probe; + /* + * For most device drivers, no need to care about this flag as long as + * all DMAs are handled through the kernel DMA API. For some special + * ones, for example VFIO drivers, they know how to manage the DMA + * themselves and set this flag so that the IOMMU layer will allow them + * to setup and manage their own I/O address space. + */ + bool driver_managed_dma; }; #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \ @@ -328,8 +340,6 @@ extern int platform_pm_restore(struct device *dev); #define platform_pm_restore NULL #endif -extern int platform_dma_configure(struct device *dev); - #ifdef CONFIG_PM_SLEEP #define USE_PLATFORM_PM_SLEEP_OPS \ .suspend = platform_pm_suspend, \ |