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gpu: nvgpu: abstract away ioctl gpfifo read

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The biggest remaining Linuxism in the submit path is the
copy_from_user() calls for reading the gpfifo entries to the HW-visible
buffer. Abstract away the copy of one such segment starting at some
offset and keep the wraparound logic and vidmem proxy in the core submit
path.

Jira NVGPU-705

Change-Id: I0c6438045c695e5e3f5da4fbc0c92d2c6e7f32cb
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1730480
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Konsta Holtta
2018-05-18 11:35:29 +03:00
committed by mobile promotions
parent 0ca69a482d
commit 819f32bdf1
4 changed files with 80 additions and 40 deletions
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8
drivers/gpu/nvgpu/os/linux/ioctl_channel.c
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@@ -776,6 +776,7 @@ static int gk20a_ioctl_channel_submit_gpfifo(
u32 submit_flags = 0;
int fd = -1;
struct gk20a *g = ch->g;
struct nvgpu_gpfifo_userdata userdata;
int ret = 0;
nvgpu_log_fn(g, " ");
@@ -798,7 +799,12 @@ static int gk20a_ioctl_channel_submit_gpfifo(
return fd;
}
ret = gk20a_submit_channel_gpfifo_user(ch, args, args->num_entries,
userdata.entries = (struct nvgpu_gpfifo_entry __user*)
(uintptr_t)args->gpfifo;
userdata.context = NULL;
ret = gk20a_submit_channel_gpfifo_user(ch,
userdata, args->num_entries,
submit_flags, &fence, &fence_out, profile);
if (ret) {