Merge "pci: msm: Dump PCIe registers to debug linkdown" (5bc1f887) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/pci/controller/pci-msm.c

+33 −0

Original line number	Diff line number	Diff line
		@@ -1280,6 +1280,29 @@ static void pcie_parf_dump(struct msm_pcie_dev_t *dev)
		}
		}

		static void pcie_dm_core_dump(struct msm_pcie_dev_t *dev)
		{
		int i, size;

		PCIE_DUMP(dev, "PCIe: RC%d DBI/dm_core register dump\n", dev->rc_idx);

		size = resource_size(dev->res[MSM_PCIE_RES_DM_CORE].resource);

		for (i = 0; i < size; i += 32) {
		PCIE_DUMP(dev,
		"RC%d: 0x%04x %08x %08x %08x %08x %08x %08x %08x %08x\n",
		dev->rc_idx, i,
		readl_relaxed(dev->dm_core + i),
		readl_relaxed(dev->dm_core + (i + 4)),
		readl_relaxed(dev->dm_core + (i + 8)),
		readl_relaxed(dev->dm_core + (i + 12)),
		readl_relaxed(dev->dm_core + (i + 16)),
		readl_relaxed(dev->dm_core + (i + 20)),
		readl_relaxed(dev->dm_core + (i + 24)),
		readl_relaxed(dev->dm_core + (i + 28)));
		}
		}

		static void msm_pcie_show_status(struct msm_pcie_dev_t *dev)
		{
		PCIE_DBG_FS(dev, "PCIe: RC%d is %s enumerated\n",
		@@ -5034,6 +5057,16 @@ static irqreturn_t handle_linkdown_irq(int irq, void *data)
		dev->link_status = MSM_PCIE_LINK_DOWN;
		dev->shadow_en = false;

		/* PCIe registers dump on link down */
		if ((dev->rc_idx == 0) \|\| (dev->rc_idx == 2)) {
		PCIE_DUMP(dev,
		"PCIe:Linkdown IRQ for RC%d Dumping PCIe registers\n",
		dev->rc_idx);
		pcie_phy_dump(dev);
		pcie_parf_dump(dev);
		pcie_dm_core_dump(dev);
		}

		if (dev->linkdown_panic)
		panic("User has chosen to panic on linkdown\n");