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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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18
drivers/gpu/nvgpu/os/linux/module.c
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@@ -648,6 +648,16 @@ void __iomem *nvgpu_devm_ioremap(struct device *dev, resource_size_t offset,
return devm_ioremap(dev, offset, size);
}
u64 nvgpu_resource_addr(struct platform_device *dev, int i)
{
struct resource *r = platform_get_resource(dev, IORESOURCE_MEM, i);
if (!r)
return 0;
return r->start;
}
static irqreturn_t gk20a_intr_isr_stall(int irq, void *dev_id)
{
struct gk20a *g = dev_id;
@@ -736,6 +746,14 @@ static int gk20a_init_support(struct platform_device *pdev)
goto fail;
}
l->regs_bus_addr = nvgpu_resource_addr(pdev,
GK20A_BAR0_IORESOURCE_MEM);
if (!l->regs_bus_addr) {
nvgpu_err(g, "failed to read register bus offset");
err = -ENODEV;
goto fail;
}
l->bar1 = nvgpu_devm_ioremap_resource(pdev,
GK20A_BAR1_IORESOURCE_MEM,
&l->bar1_mem);