diff options
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_module.c')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_module.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_module.c b/drivers/gpu/drm/ttm/ttm_module.c index 997c458f68a9..aa137ead5cc5 100644 --- a/drivers/gpu/drm/ttm/ttm_module.c +++ b/drivers/gpu/drm/ttm/ttm_module.c @@ -40,6 +40,18 @@ #include "ttm_module.h" /** + * DOC: TTM + * + * TTM is a memory manager for accelerator devices with dedicated memory. + * + * The basic idea is that resources are grouped together in buffer objects of + * certain size and TTM handles lifetime, movement and CPU mappings of those + * objects. + * + * TODO: Add more design background and information here. + */ + +/** * ttm_prot_from_caching - Modify the page protection according to the * ttm cacing mode * @caching: The ttm caching mode @@ -56,11 +68,14 @@ pgprot_t ttm_prot_from_caching(enum ttm_caching caching, pgprot_t tmp) #if defined(__i386__) || defined(__x86_64__) if (caching == ttm_write_combined) tmp = pgprot_writecombine(tmp); +#ifndef CONFIG_UML else if (boot_cpu_data.x86 > 3) tmp = pgprot_noncached(tmp); -#endif +#endif /* CONFIG_UML */ +#endif /* __i386__ || __x86_64__ */ #if defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \ - defined(__powerpc__) || defined(__mips__) + defined(__powerpc__) || defined(__mips__) || defined(__loongarch__) || \ + defined(__riscv) if (caching == ttm_write_combined) tmp = pgprot_writecombine(tmp); else @@ -72,22 +87,6 @@ pgprot_t ttm_prot_from_caching(enum ttm_caching caching, pgprot_t tmp) return tmp; } -struct dentry *ttm_debugfs_root; - -static int __init ttm_init(void) -{ - ttm_debugfs_root = debugfs_create_dir("ttm", NULL); - return 0; -} - -static void __exit ttm_exit(void) -{ - debugfs_remove(ttm_debugfs_root); -} - -module_init(ttm_init); -module_exit(ttm_exit); - MODULE_AUTHOR("Thomas Hellstrom, Jerome Glisse"); MODULE_DESCRIPTION("TTM memory manager subsystem (for DRM device)"); MODULE_LICENSE("GPL and additional rights"); |