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nvgpu:cic: API to handle fatal error interrupt

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Any corrected or uncorrected error reported by gpu hw
will be seen by nvgpu-mon. nvgpu-mon will raise a devctl call
to notify nvgpu-rm if its a fatal error interrupt.
nvgpu_cic_mon_handle_fatal_intr is the corresponding handler which will
walk through the entire tree structure of interrupts for all the subunits
and enter quiesce state.

Change-Id: I3c00c61a7f2c52ae1920f84ee7dfb65cba6b683d
Signed-off-by: Kishan <kpalankar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2801693
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Vaibhav Kachore <vkachore@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Kishan
2022-11-02 07:40:10 +00:00
committed by mobile promotions
parent 69adc6c91d
commit ea9aebb358
2 changed files with 28 additions and 0 deletions
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12
drivers/gpu/nvgpu/common/cic/mon/mon_intr.c
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@@ -153,6 +153,18 @@ void nvgpu_cic_mon_intr_nonstall_handle(struct gk20a *g)
(void)nvgpu_cic_rm_broadcast_last_irq_nonstall(g);
}
#endif
#ifdef CONFIG_NVGPU_MON_PRESENT
int nvgpu_cic_mon_handle_fatal_intr(struct gk20a *g)
{
if (nvgpu_is_powered_off(g)) {
nvgpu_err(g, "GPU is already powered off");
return -ENODEV;
}
g->ops.mc.isr_stall(g);
return 0U;
}
#endif
u32 nvgpu_cic_mon_intr_stall_isr(struct gk20a *g)
{

16
drivers/gpu/nvgpu/include/nvgpu/cic_mon.h
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@@ -409,6 +409,22 @@ int nvgpu_cic_mon_report_err_safety_services(struct gk20a *g,
*/
int nvgpu_cic_mon_get_num_hw_modules(struct gk20a *g);
#ifdef CONFIG_NVGPU_MON_PRESENT
/**
* @brief Fatal error interrupt handler for safety.
*
* @param g [in] The GPU driver struct.
*
* This function is invoked by NVGPU_MON_DEVCTL_NOTIFY_INTR devctl raised by nvgpu-mon.
* It is called to parse the interrupt tree and determine exact error.
* The unit ISR functions are invoked based on triggered interrupts.
*
* @retval -ENODEV if GPU is already powered off.
* @retval 0U if Fatal interrupt handling was performed succcessfully.
*/
int nvgpu_cic_mon_handle_fatal_intr(struct gk20a *g);
#endif
/**
* @brief Top half of stall interrupt ISR.
*