We need this for discrete.
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
lib/i915/gem_mman.c | 37 +++++++++++++++++++++++++++++++++++++
lib/i915/gem_mman.h | 4 ++++
2 files changed, 41 insertions(+)
diff --git a/lib/i915/gem_mman.c b/lib/i915/gem_mman.c
index 4b4f2114..e2514f0c 100644
--- a/lib/i915/gem_mman.c
+++ b/lib/i915/gem_mman.c
@@ -497,6 +497,43 @@ void *gem_mmap_offset__cpu(int fd, uint32_t handle, uint64_t offset,
return ptr;
}
+#define LOCAL_I915_MMAP_OFFSET_FIXED 4
+
+void *__gem_mmap_offset__fixed(int fd, uint32_t handle, uint64_t offset,
+ uint64_t size, unsigned prot)
+{
+ return __gem_mmap_offset(fd, handle, offset, size, prot,
+ LOCAL_I915_MMAP_OFFSET_FIXED);
+}
+
+/**
+ * gem_mmap_offset__fixed: Used to mmap objects on discrete platforms
+ * @fd: open i915 drm file descriptor
+ * @handle: gem buffer object handle
+ * @offset: offset in the gem buffer of the mmap arena
+ * @size: size of the mmap arena
+ * @prot: memory protection bits as used by mmap()
+ *
+ * Like __gem_mmap_offset__fixed() except we assert on failure.
+ *
+ * For discrete the caching attributes for the pages are fixed at allocation
+ * time, and can't be changed. The FIXED mode will simply use the same caching *
+ * mode of the allocated pages. This mode will always be coherent with GPU
+ * access.
+ *
+ * On non-discrete platforms this mode is not supported.
+ *
+ * Returns: A pointer to the created memory mapping
+ */
+void *gem_mmap_offset__fixed(int fd, uint32_t handle, uint64_t offset,
+ uint64_t size, unsigned prot)
+{
+ void *ptr = __gem_mmap_offset__fixed(fd, handle, offset, size, prot);
+
+ igt_assert(ptr);
+ return ptr;
+}
+
/**
* __gem_mmap__cpu_coherent:
* @fd: open i915 drm file descriptor
diff --git a/lib/i915/gem_mman.h b/lib/i915/gem_mman.h
index 5695d2ad..290c997d 100644
--- a/lib/i915/gem_mman.h
+++ b/lib/i915/gem_mman.h
@@ -37,6 +37,8 @@ bool gem_mmap_offset__has_wc(int fd);
void *gem_mmap__wc(int fd, uint32_t handle, uint64_t offset, uint64_t size, unsigned prot);
void *gem_mmap_offset__wc(int fd, uint32_t handle, uint64_t offset,
uint64_t size, unsigned prot);
+void *gem_mmap_offset__fixed(int fd, uint32_t handle, uint64_t offset,
+ uint64_t size, unsigned prot);
void *gem_mmap__device_coherent(int fd, uint32_t handle, uint64_t offset,
uint64_t size, unsigned prot);
void *gem_mmap__cpu_coherent(int fd, uint32_t handle, uint64_t offset,
@@ -54,6 +56,8 @@ void *__gem_mmap_offset__cpu(int fd, uint32_t handle, uint64_t offset,
void *__gem_mmap__wc(int fd, uint32_t handle, uint64_t offset, uint64_t size, unsigned prot);
void *__gem_mmap_offset__wc(int fd, uint32_t handle, uint64_t offset,
uint64_t size, unsigned prot);
+void *__gem_mmap_offset__fixed(int fd, uint32_t handle, uint64_t offset,
+ uint64_t size, unsigned prot);
void *__gem_mmap__device_coherent(int fd, uint32_t handle, uint64_t offset,
uint64_t size, unsigned prot);
void *__gem_mmap_offset(int fd, uint32_t handle, uint64_t offset, uint64_t size,
--
2.26.3
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