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gpu: nvgpu: add igpu support for clk_arbiter.

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This patch constructs clk_arbiter specific code for gp10b as well as
gv11b and does the necessary plumbing in the clk_arbiter code. The
changes made are as follows.

1) Constructed clk_arb_gp10b.* files which add support for clk_arb
related HALS including the nvgpu_clk_arb_init and nvgpu_clk_arb_cb.
This doesn't have support for debugfs nor the VFUpdateEvent yet and
consequently no support for arb->notifications.

2) Added gpcclk specific variables corresponding to every gpc2clk in
a given clk_arb related struct.

3) Linux specific support_clk_freq_controller is assigned true in
platform_gp10b.c and platform_gv11b.c files.

4) Incremented the clk_arb_worker.put atomic variable during
worker_deinit so as to allow the worker thread to be stopped.

5) Added the flag clk_arb_events_supported as part of struct
nvgpu_clk_arb. This flag is used to selectively account for the extra
refcounting present in OS specific code i.e.
nvgpu_clk_arb_commit_request_fd. For igpus, the extra refcount is
reduced during nvgpu_clk_arb_release_completion_dev.

Bug 2061372

Change-Id: Id00acb106db2b46e55aa0324034a16a73723c078
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1774281
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Debarshi Dutta
2018-09-04 10:55:33 +05:30
committed by mobile promotions
parent 1c7258411d
commit 519948a9c6
17 changed files with 544 additions and 9 deletions
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11
drivers/gpu/nvgpu/os/linux/ioctl_clk_arb.c
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@@ -55,6 +55,13 @@ static int nvgpu_clk_arb_release_completion_dev(struct inode *inode,
clk_arb_dbg(session->g, " ");
/* This is done to account for the extra refcount taken in
* nvgpu_clk_arb_commit_request_fd without events support in iGPU
*/
if (!session->g->clk_arb->clk_arb_events_supported) {
nvgpu_ref_put(&dev->refcount, nvgpu_clk_arb_free_fd);
}
nvgpu_ref_put(&session->refcount, nvgpu_clk_arb_free_session);
nvgpu_ref_put(&dev->refcount, nvgpu_clk_arb_free_fd);
return 0;
@@ -425,6 +432,10 @@ int nvgpu_clk_arb_commit_request_fd(struct gk20a *g,
err = -EINVAL;
goto fdput_fd;
}
clk_arb_dbg(g, "requested target = %u\n",
(u32)dev->gpc2clk_target_mhz);
nvgpu_ref_get(&dev->refcount);
nvgpu_spinlock_acquire(&session->session_lock);
nvgpu_list_add(&dev->node, &session->targets);