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gpu: nvgpu: use devm variants to ioremap

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While removing nvgpu driver, devm mapped reg mappings
are released on driver_unregister. For iGPU, these
regs are explicitly unmapped with iounmap(). This
results in "Trying to vfree() nonexistent vm area"
warnings on driver removal.

Address this by using devm* variants to map all IO regions
of both iGPU and dGPU and let the driver unregister
release these mappings.

Also, lock out GPU regs in driver removal path.

Bug 1987855

Change-Id: I0388daf90bea3eaf8752255059cfd3ceabf66e7d
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1730539
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Nitin Kumbhar
2018-05-25 16:39:07 +05:30
committed by mobile promotions
parent c8347c8369
commit 4b889fb8b0
4 changed files with 38 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/gpu/nvgpu/os/linux/module.c
View File

@@ -606,8 +606,8 @@ static int gk20a_do_unidle(void *_g)
}
#endif
void __iomem *nvgpu_ioremap_resource(struct platform_device *dev, int i,
struct resource **out)
void __iomem *nvgpu_devm_ioremap_resource(struct platform_device *dev, int i,
struct resource **out)
{
struct resource *r = platform_get_resource(dev, IORESOURCE_MEM, i);
@@ -618,6 +618,12 @@ void __iomem *nvgpu_ioremap_resource(struct platform_device *dev, int i,
return devm_ioremap_resource(&dev->dev, r);
}
void __iomem *nvgpu_devm_ioremap(struct device *dev, resource_size_t offset,
resource_size_t size)
{
return devm_ioremap(dev, offset, size);
}
static irqreturn_t gk20a_intr_isr_stall(int irq, void *dev_id)
{
struct gk20a *g = dev_id;
@@ -673,46 +679,41 @@ void gk20a_remove_support(struct gk20a *g)
sim_linux->remove_support_linux(g);
}
/* free mappings to registers, etc */
if (l->regs) {
iounmap(l->regs);
l->regs = NULL;
}
if (l->bar1) {
iounmap(l->bar1);
l->bar1 = NULL;
}
nvgpu_remove_usermode_support(g);
nvgpu_free_enabled_flags(g);
gk20a_lockout_registers(g);
}
static int gk20a_init_support(struct platform_device *dev)
static int gk20a_init_support(struct platform_device *pdev)
{
int err = -ENOMEM;
struct gk20a *g = get_gk20a(&dev->dev);
struct device *dev = &pdev->dev;
struct gk20a *g = get_gk20a(dev);
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
int err = -ENOMEM;
tegra_register_idle_unidle(gk20a_do_idle, gk20a_do_unidle, g);
l->regs = nvgpu_ioremap_resource(dev, GK20A_BAR0_IORESOURCE_MEM,
&l->reg_mem);
l->regs = nvgpu_devm_ioremap_resource(pdev,
GK20A_BAR0_IORESOURCE_MEM,
&l->reg_mem);
if (IS_ERR(l->regs)) {
nvgpu_err(g, "failed to remap gk20a registers");
err = PTR_ERR(l->regs);
goto fail;
}
l->bar1 = nvgpu_ioremap_resource(dev, GK20A_BAR1_IORESOURCE_MEM,
&l->bar1_mem);
l->bar1 = nvgpu_devm_ioremap_resource(pdev,
GK20A_BAR1_IORESOURCE_MEM,
&l->bar1_mem);
if (IS_ERR(l->bar1)) {
nvgpu_err(g, "failed to remap gk20a bar1");
err = PTR_ERR(l->bar1);
goto fail;
}
err = nvgpu_init_sim_support_linux(g, dev);
err = nvgpu_init_sim_support_linux(g, pdev);
if (err)
goto fail;
err = nvgpu_init_sim_support(g);
@@ -725,14 +726,11 @@ static int gk20a_init_support(struct platform_device *dev)
fail_sim:
nvgpu_remove_sim_support_linux(g);
fail:
if (l->regs) {
iounmap(l->regs);
if (l->regs)
l->regs = NULL;
}
if (l->bar1) {
iounmap(l->bar1);
if (l->bar1)
l->bar1 = NULL;
}
return err;
}