From: Vidya Sagar <vidyas@nvidia.com>
Date: Thu, 21 Jul 2022 19:50:45 +0530
Subject: PCI: tegra194: Find RAS DES PCIe capability offset
Git-commit: 997b99e3b386bde1d519d39f5276b10c67a8f172
Patch-mainline: v6.0-rc1
References: jsc#PED-1763
Find RAS DES PCIe capability offset instead of hardcoding the offset
for each controller.
Link: https://lore.kernel.org/r/20220721142052.25971-10-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
drivers/pci/controller/dwc/pcie-designware.h | 19 +++++++
drivers/pci/controller/dwc/pcie-tegra194.c | 53 ++++++--------------
2 files changed, 35 insertions(+), 37 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 7d6e9b7576be5..56d93e67a9640 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -130,6 +130,25 @@
#define PCIE_ATU_UNR_UPPER_TARGET 0x18
#define PCIE_ATU_UNR_UPPER_LIMIT 0x20
+/*
+ * RAS-DES register definitions
+ */
+#define PCIE_RAS_DES_EVENT_COUNTER_CONTROL 0x8
+#define EVENT_COUNTER_ALL_CLEAR 0x3
+#define EVENT_COUNTER_ENABLE_ALL 0x7
+#define EVENT_COUNTER_ENABLE_SHIFT 2
+#define EVENT_COUNTER_EVENT_SEL_MASK GENMASK(7, 0)
+#define EVENT_COUNTER_EVENT_SEL_SHIFT 16
+#define EVENT_COUNTER_EVENT_Tx_L0S 0x2
+#define EVENT_COUNTER_EVENT_Rx_L0S 0x3
+#define EVENT_COUNTER_EVENT_L1 0x5
+#define EVENT_COUNTER_EVENT_L1_1 0x7
+#define EVENT_COUNTER_EVENT_L1_2 0x8
+#define EVENT_COUNTER_GROUP_SEL_SHIFT 24
+#define EVENT_COUNTER_GROUP_5 0x5
+
+#define PCIE_RAS_DES_EVENT_COUNTER_DATA 0xc
+
/*
* The default address offset between dbi_base and atu_base. Root controller
* drivers are not required to initialize atu_base if the offset matches this
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index bd16245fc2c44..6f890453021d1 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -170,19 +170,6 @@
#define CFG_TIMER_CTRL_MAX_FUNC_NUM_OFF 0x718
#define CFG_TIMER_CTRL_ACK_NAK_SHIFT (19)
-#define EVENT_COUNTER_ALL_CLEAR 0x3
-#define EVENT_COUNTER_ENABLE_ALL 0x7
-#define EVENT_COUNTER_ENABLE_SHIFT 2
-#define EVENT_COUNTER_EVENT_SEL_MASK GENMASK(7, 0)
-#define EVENT_COUNTER_EVENT_SEL_SHIFT 16
-#define EVENT_COUNTER_EVENT_Tx_L0S 0x2
-#define EVENT_COUNTER_EVENT_Rx_L0S 0x3
-#define EVENT_COUNTER_EVENT_L1 0x5
-#define EVENT_COUNTER_EVENT_L1_1 0x7
-#define EVENT_COUNTER_EVENT_L1_2 0x8
-#define EVENT_COUNTER_GROUP_SEL_SHIFT 24
-#define EVENT_COUNTER_GROUP_5 0x5
-
#define N_FTS_VAL 52
#define FTS_VAL 52
@@ -266,6 +253,7 @@ struct tegra_pcie_dw {
u32 num_lanes;
u32 cid;
u32 cfg_link_cap_l1sub;
+ u32 ras_des_cap;
u32 pcie_cap_base;
u32 aspm_cmrt;
u32 aspm_pwr_on_t;
@@ -574,24 +562,6 @@ static struct pci_ops tegra_pci_ops = {
};
#if defined(CONFIG_PCIEASPM)
-static const u32 event_cntr_ctrl_offset[] = {
- 0x1d8,
- 0x1a8,
- 0x1a8,
- 0x1a8,
- 0x1c4,
- 0x1d8
-};
-
-static const u32 event_cntr_data_offset[] = {
- 0x1dc,
- 0x1ac,
- 0x1ac,
- 0x1ac,
- 0x1c8,
- 0x1dc
-};
-
static void disable_aspm_l11(struct tegra_pcie_dw *pcie)
{
u32 val;
@@ -614,13 +584,16 @@ static inline u32 event_counter_prog(struct tegra_pcie_dw *pcie, u32 event)
{
u32 val;
- val = dw_pcie_readl_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid]);
+ val = dw_pcie_readl_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL);
val &= ~(EVENT_COUNTER_EVENT_SEL_MASK << EVENT_COUNTER_EVENT_SEL_SHIFT);
val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT;
val |= event << EVENT_COUNTER_EVENT_SEL_SHIFT;
val |= EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT;
- dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid], val);
- val = dw_pcie_readl_dbi(&pcie->pci, event_cntr_data_offset[pcie->cid]);
+ dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val);
+ val = dw_pcie_readl_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_DATA);
return val;
}
@@ -647,13 +620,15 @@ static int aspm_state_cnt(struct seq_file *s, void *data)
event_counter_prog(pcie, EVENT_COUNTER_EVENT_L1_2));
/* Clear all counters */
- dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid],
+ dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL,
EVENT_COUNTER_ALL_CLEAR);
/* Re-enable counting */
val = EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT;
val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT;
- dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid], val);
+ dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val);
return 0;
}
@@ -666,10 +641,14 @@ static void init_host_aspm(struct tegra_pcie_dw *pcie)
val = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_L1SS);
pcie->cfg_link_cap_l1sub = val + PCI_L1SS_CAP;
+ pcie->ras_des_cap = dw_pcie_find_ext_capability(&pcie->pci,
+ PCI_EXT_CAP_ID_VNDR);
+
/* Enable ASPM counters */
val = EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT;
val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT;
- dw_pcie_writel_dbi(pci, event_cntr_ctrl_offset[pcie->cid], val);
+ dw_pcie_writel_dbi(pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val);
/* Program T_cmrt and T_pwr_on values */
val = dw_pcie_readl_dbi(pci, pcie->cfg_link_cap_l1sub);
--
2.37.3