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gpu: nvgpu: store bus addr of gpu regs

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Usermode submit needs to access the usermode region of registers from
userspace. Store the start address of register resource in struct
nvgpu_os_linux to be used in remap to userspace.

Bug 200145225

Change-Id: I3796b6bf67942af0cc16c86accb82a013032bfc8
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1811838
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Konsta Holtta
2018-09-11 14:35:09 +03:00
committed by mobile promotions
parent 757f028320
commit 38c11db264
4 changed files with 28 additions and 0 deletions
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7
drivers/gpu/nvgpu/os/linux/pci.c
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@@ -537,6 +537,13 @@ static int nvgpu_pci_init_support(struct pci_dev *pdev)
goto fail;
}
l->regs_bus_addr = pci_resource_start(pdev, 0);
if (!l->regs_bus_addr) {
nvgpu_err(g, "failed to read register bus offset");
err = -ENODEV;
goto fail;
}
l->bar1 = nvgpu_devm_ioremap(dev, pci_resource_start(pdev, 1),
pci_resource_len(pdev, 1));
if (IS_ERR(l->bar1)) {