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authorJeya R <jeyr@codeaurora.org>2022-02-14 16:09:52 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-03-18 14:11:00 +0100
commit5c1b97c7d7b736e6439af4f43a65837bc72f56c1 (patch)
treeca750bb1ffd3e6c205f1dae1ff8bdbde65014cb1 /include/uapi/misc
parent965602eabb57d086466ad749e81941e3dd66b595 (diff)
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misc: fastrpc: add support for FASTRPC_IOCTL_MEM_MAP/UNMAP
Add support for IOCTL requests to map and unmap on DSP based on map flags. Signed-off-by: Jeya R <jeyr@codeaurora.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20220214161002.6831-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi/misc')
-rw-r--r--include/uapi/misc/fastrpc.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/include/uapi/misc/fastrpc.h b/include/uapi/misc/fastrpc.h
index 0a89f95463f6..d248eeb20e67 100644
--- a/include/uapi/misc/fastrpc.h
+++ b/include/uapi/misc/fastrpc.h
@@ -13,6 +13,37 @@
#define FASTRPC_IOCTL_MMAP _IOWR('R', 6, struct fastrpc_req_mmap)
#define FASTRPC_IOCTL_MUNMAP _IOWR('R', 7, struct fastrpc_req_munmap)
#define FASTRPC_IOCTL_INIT_ATTACH_SNS _IO('R', 8)
+#define FASTRPC_IOCTL_MEM_MAP _IOWR('R', 10, struct fastrpc_mem_map)
+#define FASTRPC_IOCTL_MEM_UNMAP _IOWR('R', 11, struct fastrpc_mem_unmap)
+
+/**
+ * enum fastrpc_map_flags - control flags for mapping memory on DSP user process
+ * @FASTRPC_MAP_STATIC: Map memory pages with RW- permission and CACHE WRITEBACK.
+ * The driver is responsible for cache maintenance when passed
+ * the buffer to FastRPC calls. Same virtual address will be
+ * assigned for subsequent FastRPC calls.
+ * @FASTRPC_MAP_RESERVED: Reserved
+ * @FASTRPC_MAP_FD: Map memory pages with RW- permission and CACHE WRITEBACK.
+ * Mapping tagged with a file descriptor. User is responsible for
+ * CPU and DSP cache maintenance for the buffer. Get virtual address
+ * of buffer on DSP using HAP_mmap_get() and HAP_mmap_put() APIs.
+ * @FASTRPC_MAP_FD_DELAYED: Mapping delayed until user call HAP_mmap() and HAP_munmap()
+ * functions on DSP. It is useful to map a buffer with cache modes
+ * other than default modes. User is responsible for CPU and DSP
+ * cache maintenance for the buffer.
+ * @FASTRPC_MAP_FD_NOMAP: This flag is used to skip CPU mapping,
+ * otherwise behaves similar to FASTRPC_MAP_FD_DELAYED flag.
+ * @FASTRPC_MAP_MAX: max count for flags
+ *
+ */
+enum fastrpc_map_flags {
+ FASTRPC_MAP_STATIC = 0,
+ FASTRPC_MAP_RESERVED,
+ FASTRPC_MAP_FD = 2,
+ FASTRPC_MAP_FD_DELAYED,
+ FASTRPC_MAP_FD_NOMAP = 16,
+ FASTRPC_MAP_MAX,
+};
struct fastrpc_invoke_args {
__u64 ptr;
@@ -49,9 +80,29 @@ struct fastrpc_req_mmap {
__u64 vaddrout; /* dsp virtual address */
};
+struct fastrpc_mem_map {
+ __s32 version;
+ __s32 fd; /* fd */
+ __s32 offset; /* buffer offset */
+ __u32 flags; /* flags defined in enum fastrpc_map_flags */
+ __u64 vaddrin; /* buffer virtual address */
+ __u64 length; /* buffer length */
+ __u64 vaddrout; /* [out] remote virtual address */
+ __s32 attrs; /* buffer attributes used for SMMU mapping */
+ __s32 reserved[4];
+};
+
struct fastrpc_req_munmap {
__u64 vaddrout; /* address to unmap */
__u64 size; /* size */
};
+struct fastrpc_mem_unmap {
+ __s32 vesion;
+ __s32 fd; /* fd */
+ __u64 vaddr; /* remote process (dsp) virtual address */
+ __u64 length; /* buffer size */
+ __s32 reserved[5];
+};
+
#endif /* __QCOM_FASTRPC_H__ */