diff options
| author | Siva Mullati <siva.mullati@intel.com> | 2021-12-08 07:12:15 +0300 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2021-12-09 00:26:14 +0300 |
| commit | 67c430bbaae153433f76807d07b8298ac4714822 (patch) | |
| tree | 9314384b21a1af645534144c260d80ebe97b455a /drivers/gpu/drm/i915/i915_mm.c | |
| parent | c9ee950a2ca55ea0f63d0893f796b2eb089e7900 (diff) | |
| download | linux-67c430bbaae153433f76807d07b8298ac4714822.tar.xz | |
drm/i915: Skip remap_io_mapping() for non-x86 platforms
Only hw that supports mappable aperture would hit this path
vm_fault_gtt/vm_fault_tmm, So we never hit this function
remap_io_mapping() in discrete, So skip this code for non-x86
architectures.
v2: use IS_ENABLED () instead of #if defined
v3: move function prototypes from i915_drv.h to i915_mm.h
v4: added kernel error message in stub function
v5: fixed compilation warnings
v6: checkpatch style
Signed-off-by: Siva Mullati <siva.mullati@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211208041215.763098-1-siva.mullati@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_mm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_mm.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/gpu/drm/i915/i915_mm.c b/drivers/gpu/drm/i915/i915_mm.c index 666808cb3a32..7998bc74ab49 100644 --- a/drivers/gpu/drm/i915/i915_mm.c +++ b/drivers/gpu/drm/i915/i915_mm.c @@ -27,6 +27,7 @@ #include "i915_drv.h" +#include "i915_mm.h" struct remap_pfn { struct mm_struct *mm; @@ -37,17 +38,6 @@ struct remap_pfn { resource_size_t iobase; }; -static int remap_pfn(pte_t *pte, unsigned long addr, void *data) -{ - struct remap_pfn *r = data; - - /* Special PTE are not associated with any struct page */ - set_pte_at(r->mm, addr, pte, pte_mkspecial(pfn_pte(r->pfn, r->prot))); - r->pfn++; - - return 0; -} - #define use_dma(io) ((io) != -1) static inline unsigned long sgt_pfn(const struct remap_pfn *r) @@ -77,6 +67,20 @@ static int remap_sg(pte_t *pte, unsigned long addr, void *data) return 0; } +#define EXPECTED_FLAGS (VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP) + +#if IS_ENABLED(CONFIG_X86) +static int remap_pfn(pte_t *pte, unsigned long addr, void *data) +{ + struct remap_pfn *r = data; + + /* Special PTE are not associated with any struct page */ + set_pte_at(r->mm, addr, pte, pte_mkspecial(pfn_pte(r->pfn, r->prot))); + r->pfn++; + + return 0; +} + /** * remap_io_mapping - remap an IO mapping to userspace * @vma: user vma to map to @@ -94,7 +98,6 @@ int remap_io_mapping(struct vm_area_struct *vma, struct remap_pfn r; int err; -#define EXPECTED_FLAGS (VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP) GEM_BUG_ON((vma->vm_flags & EXPECTED_FLAGS) != EXPECTED_FLAGS); /* We rely on prevalidation of the io-mapping to skip track_pfn(). */ @@ -111,6 +114,7 @@ int remap_io_mapping(struct vm_area_struct *vma, return 0; } +#endif /** * remap_io_sg - remap an IO mapping to userspace |