linux-kernel - [PATCH 1/2] mmc: sdhci-pci-gli: Use PCI AER definitions, not hard-coded values

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Message-Id: <20240327214831.1544595-2-helgaas@kernel.org>
Date: Wed, 27 Mar 2024 16:48:30 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Adrian Hunter <adrian.hunter@...el.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Victor Shih <victor.shih@...esyslogic.com.tw>,
	Ben Chuang <ben.chuang@...esyslogic.com.tw>
Cc: Kai-Heng Feng <kai.heng.geng@...onical.com>,
	Sven van Ashbrook <svenva@...omium.org>,
	Stanislaw Kardach <skardach@...gle.com>,
	Brian Norris <briannorris@...omium.org>,
	Jason Lai <jasonlai.genesyslogic@...il.com>,
	Renius Chen <reniuschengl@...il.com>,
	linux-pci@...r.kernel.org,
	linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH 1/2] mmc: sdhci-pci-gli: Use PCI AER definitions, not hard-coded values

From: Bjorn Helgaas <bhelgaas@...gle.com>

015c9cbcf0ad ("mmc: sdhci-pci-gli: GL9750: Mask the replay timer timeout of
AER") added PCI_GLI_9750_CORRERR_MASK, the offset of the AER Capability in
config space, and PCI_GLI_9750_CORRERR_MASK_REPLAY_TIMER_TIMEOUT, the
Replay Timer Timeout bit in the AER Correctable Error Status register.

Use pci_find_ext_capability() to locate the AER Capability and use the
existing PCI_ERR_COR_REP_TIMER definition to mask the bit.

This removes a little bit of unnecessarily device-specific code and makes
AER-related things more greppable.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/mmc/host/sdhci-pci-gli.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index 77911a57b12c..3d5543581537 100644
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -28,9 +28,6 @@
 #define PCI_GLI_9750_PM_CTRL	0xFC
 #define   PCI_GLI_9750_PM_STATE	  GENMASK(1, 0)
 
-#define PCI_GLI_9750_CORRERR_MASK				0x214
-#define   PCI_GLI_9750_CORRERR_MASK_REPLAY_TIMER_TIMEOUT	  BIT(12)
-
 #define SDHCI_GLI_9750_CFG2          0x848
 #define   SDHCI_GLI_9750_CFG2_L1DLY    GENMASK(28, 24)
 #define   GLI_9750_CFG2_L1DLY_VALUE    0x1F
@@ -155,9 +152,6 @@
 #define PCI_GLI_9755_PM_CTRL     0xFC
 #define   PCI_GLI_9755_PM_STATE    GENMASK(1, 0)
 
-#define PCI_GLI_9755_CORRERR_MASK				0x214
-#define   PCI_GLI_9755_CORRERR_MASK_REPLAY_TIMER_TIMEOUT	  BIT(12)
-
 #define SDHCI_GLI_9767_GM_BURST_SIZE			0x510
 #define   SDHCI_GLI_9767_GM_BURST_SIZE_AXI_ALWAYS_SET	  BIT(8)
 
@@ -547,6 +541,7 @@ static void gl9750_hw_setting(struct sdhci_host *host)
 {
 	struct sdhci_pci_slot *slot = sdhci_priv(host);
 	struct pci_dev *pdev;
+	int aer;
 	u32 value;
 
 	pdev = slot->chip->pdev;
@@ -568,9 +563,12 @@ static void gl9750_hw_setting(struct sdhci_host *host)
 	pci_write_config_dword(pdev, PCI_GLI_9750_PM_CTRL, value);
 
 	/* mask the replay timer timeout of AER */
-	pci_read_config_dword(pdev, PCI_GLI_9750_CORRERR_MASK, &value);
-	value |= PCI_GLI_9750_CORRERR_MASK_REPLAY_TIMER_TIMEOUT;
-	pci_write_config_dword(pdev, PCI_GLI_9750_CORRERR_MASK, value);
+	aer = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
+	if (aer) {
+		pci_read_config_dword(pdev, aer + PCI_ERR_COR_MASK, &value);
+		value |= PCI_ERR_COR_REP_TIMER;
+		pci_write_config_dword(pdev, aer + PCI_ERR_COR_MASK, value);
+	}
 
 	gl9750_wt_off(host);
 }
@@ -745,6 +743,7 @@ static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock)
 static void gl9755_hw_setting(struct sdhci_pci_slot *slot)
 {
 	struct pci_dev *pdev = slot->chip->pdev;
+	int aer;
 	u32 value;
 
 	gl9755_wt_on(pdev);
@@ -782,9 +781,12 @@ static void gl9755_hw_setting(struct sdhci_pci_slot *slot)
 	pci_write_config_dword(pdev, PCI_GLI_9755_PM_CTRL, value);
 
 	/* mask the replay timer timeout of AER */
-	pci_read_config_dword(pdev, PCI_GLI_9755_CORRERR_MASK, &value);
-	value |= PCI_GLI_9755_CORRERR_MASK_REPLAY_TIMER_TIMEOUT;
-	pci_write_config_dword(pdev, PCI_GLI_9755_CORRERR_MASK, value);
+	aer = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
+	if (aer) {
+		pci_read_config_dword(pdev, aer + PCI_ERR_COR_MASK, &value);
+		value |= PCI_ERR_COR_REP_TIMER;
+		pci_write_config_dword(pdev, aer + PCI_ERR_COR_MASK, value);
+	}
 
 	gl9755_wt_off(pdev);
 }
-- 
2.34.1