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msm: pci: Dump PCIe clock registers on link failure

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Dump PCie clocks on failure to enter link into L0,
linkdown interrupt, and on receiving wake IRQ  from device.

Change-Id: I89430b25feeb165709ac44d3af65c73b8ab4eada
Signed-off-by: Vivek Pernamitta <quic_vpernami@quicinc.com>
Signed-off-by: Prudhvi Yarlagadda <quic_pyarlaga@quicinc.com>
This commit is contained in:
Vivek Pernamitta 2022-04-05 17:21:34 +05:30 committed by Gerrit - the friendly Code Review server
parent 0b800d87c4
commit 51dafa59bf
1 changed files with 26 additions and 1 deletions
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27
drivers/pci/controller/pci-msm.c
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@ -35,6 +35,7 @@
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/kfifo.h>
#include <linux/clk/qcom.h>
#include "../pci.h"
@ -304,7 +305,6 @@
pr_err("%s: " fmt, __func__, arg); \
} while (0)
enum msm_pcie_res {
MSM_PCIE_RES_PARF,
MSM_PCIE_RES_PHY,
@ -2943,6 +2943,28 @@ static bool msm_pcie_check_ltssm_state(struct msm_pcie_dev_t *dev, u32 state)
return false;
}
void msm_pcie_clk_dump(struct msm_pcie_dev_t *pcie_dev)
{
struct msm_pcie_clk_info_t *clk_info;
int i;
PCIE_ERR(pcie_dev,
"PCIe: RC%d: Dump PCIe clocks\n",
pcie_dev->rc_idx);
clk_info = pcie_dev->clk;
for (i = 0; i < pcie_dev->num_clk; i++, clk_info++) {
if (clk_info->hdl)
qcom_clk_dump(clk_info->hdl, NULL, 0);
}
clk_info = pcie_dev->pipe_clk;
for (i = 0; i < pcie_dev->num_pipe_clk; i++, clk_info++) {
if (clk_info->hdl)
qcom_clk_dump(clk_info->hdl, NULL, 0);
}
}
/**
* msm_pcie_iatu_config - configure outbound address translation region
* @dev: root commpex
@ -5772,6 +5794,7 @@ static irqreturn_t handle_wake_irq(int irq, void *data)
if (dev->drv_supported && !dev->suspending &&
dev->link_status == MSM_PCIE_LINK_ENABLED) {
msm_pcie_clk_dump(dev);
pcie_phy_dump(dev);
pcie_parf_dump(dev);
pcie_dm_core_dump(dev);
@ -5847,6 +5870,7 @@ static void msm_pcie_handle_linkdown(struct msm_pcie_dev_t *dev)
PCIE_DUMP(dev,
"PCIe:Linkdown IRQ for RC%d Dumping PCIe registers\n",
dev->rc_idx);
msm_pcie_clk_dump(dev);
pcie_phy_dump(dev);
pcie_parf_dump(dev);
pcie_dm_core_dump(dev);
@ -7165,6 +7189,7 @@ int msm_pcie_prevent_l1(struct pci_dev *pci_dev)
PCIE_ERR(pcie_dev,
"PCIe: RC%d: dump PCIe registers\n",
pcie_dev->rc_idx);
msm_pcie_clk_dump(pcie_dev);
pcie_parf_dump(pcie_dev);
pcie_dm_core_dump(pcie_dev);
pcie_phy_dump(pcie_dev);