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cnss2: notify wlan fw to stop trace collection

Forráskód böngészése 
Cnss2 driver receives cnss_pci_smmu_fault_handler cb from smmu
driver whenever wlan fw access illegal IOVA address. In
cnss smmmu fault cb handler, cnss2 driver rings trace stop
door bell register to stop tracing in wlan fw. This will
help to get proper traces to debug where illegal access
is happening in wlan fw.

Change-Id: I953ced55d4d847ccaabad15f5f70150aec8aabd6
CRs-Fixed: 3459443
This commit is contained in:
Sandeep Singh
2023-03-10 00:15:35 +05:30
committed by Madan Koyyalamudi
szülő 03a337ba78
commit 18a4f28a8d
5 fájl változott, egészen pontosan 61 új sor hozzáadva és 0 régi sor törölve
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45
cnss2/pci.c
Fájl megtekintése

@@ -819,6 +819,13 @@ static int cnss_mhi_device_get_sync_atomic(struct cnss_pci_data *pci_priv,
timeout_us, in_panic);
}
#ifdef CONFIG_CNSS2_SMMU_DB_SUPPORT
static int cnss_mhi_host_notify_db_disable_trace(struct cnss_pci_data *pci_priv)
{
return mhi_host_notify_db_disable_trace(pci_priv->mhi_ctrl);
}
#endif
static void
cnss_mhi_controller_set_bw_scale_cb(struct cnss_pci_data *pci_priv,
int (*cb)(struct mhi_controller *mhi_ctrl,
@@ -875,6 +882,13 @@ static int cnss_mhi_device_get_sync_atomic(struct cnss_pci_data *pci_priv,
return -EOPNOTSUPP;
}
#ifdef CONFIG_CNSS2_SMMU_DB_SUPPORT
static int cnss_mhi_host_notify_db_disable_trace(struct cnss_pci_data *pci_priv)
{
return -EOPNOTSUPP;
}
#endif
static void
cnss_mhi_controller_set_bw_scale_cb(struct cnss_pci_data *pci_priv,
int (*cb)(struct mhi_controller *mhi_ctrl,
@@ -893,6 +907,37 @@ void cnss_mhi_controller_set_base(struct cnss_pci_data *pci_priv,
}
#endif /* CONFIG_MHI_BUS_MISC */
#ifdef CONFIG_CNSS2_SMMU_DB_SUPPORT
#define CNSS_MHI_WAKE_TIMEOUT 500000
static void cnss_pci_smmu_fault_handler_irq(struct iommu_domain *domain,
void *handler_token)
{
struct cnss_pci_data *pci_priv = handler_token;
int ret = 0;
ret = cnss_mhi_device_get_sync_atomic(pci_priv,
CNSS_MHI_WAKE_TIMEOUT, true);
if (ret < 0) {
cnss_pr_err("Failed to bring mhi in M0 state, ret %d\n", ret);
return;
}
ret = cnss_mhi_host_notify_db_disable_trace(pci_priv);
if (ret < 0)
cnss_pr_err("Fail to notify wlan fw to stop trace collection, ret %d\n", ret);
}
void cnss_register_iommu_fault_handler_irq(struct cnss_pci_data *pci_priv)
{
qcom_iommu_set_fault_handler_irq(pci_priv->iommu_domain,
cnss_pci_smmu_fault_handler_irq, pci_priv);
}
#else
void cnss_register_iommu_fault_handler_irq(struct cnss_pci_data *pci_priv)
{
}
#endif
int cnss_pci_check_link_status(struct cnss_pci_data *pci_priv)
{
u16 device_id;