Kyle Roarty has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/47523 )
Change subject: gpu-compute: Add mmap functionality to GPURenderDriver
......................................................................
gpu-compute: Add mmap functionality to GPURenderDriver
dGPUs mmap the GPURenderDriver, however it doesn't appear that they do
anything with it. This patch implements the mmap function by just
returning the address provided, while not doing anything else
Change-Id: Ia010a2aebcf7e2c75e22d93dfb440937d1bef3b1
---
M src/gpu-compute/gpu_render_driver.cc
M src/gpu-compute/gpu_render_driver.hh
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/src/gpu-compute/gpu_render_driver.cc
b/src/gpu-compute/gpu_render_driver.cc
index 1af83cb..41730d2 100644
--- a/src/gpu-compute/gpu_render_driver.cc
+++ b/src/gpu-compute/gpu_render_driver.cc
@@ -38,7 +38,7 @@
/* ROCm 4 utilizes the render driver located at /dev/dri/renderDXXX. This
* patch implements a very simple driver that just returns a file
- * descriptor when opened, as testing has shown that's all that's needed
+ * descriptor when opened.
*/
int
GPURenderDriver::open(ThreadContext *tc, int mode, int flags)
@@ -48,3 +48,12 @@
int tgt_fd = process->fds->allocFD(device_fd_entry);
return tgt_fd;
}
+
+/* DGPUs try to mmap the driver file. It doesn't appear they do anything
+ * with it, so we just return the address that's provided
+ */
+Addr GPURenderDriver::mmap(ThreadContext *tc, Addr start, uint64_t length,
+ int prot, int tgt_flags, int tgt_fd, off_t
offset)
+{
+ return start;
+}
diff --git a/src/gpu-compute/gpu_render_driver.hh
b/src/gpu-compute/gpu_render_driver.hh
index d070668..a992976 100644
--- a/src/gpu-compute/gpu_render_driver.hh
+++ b/src/gpu-compute/gpu_render_driver.hh
@@ -47,6 +47,9 @@
{
return -EBADF;
}
+
+ Addr mmap(ThreadContext *tc, Addr start, uint64_t length,
+ int prot, int tgt_flags, int tgt_fd, off_t offset) override;
};
#endif
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: Ia010a2aebcf7e2c75e22d93dfb440937d1bef3b1
Gerrit-Change-Number: 47523
Gerrit-PatchSet: 1
Gerrit-Owner: Kyle Roarty <[email protected]>
Gerrit-MessageType: newchange
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