This is a note to let you know that I've just added the patch titled
PCI: keystone: Relocate ks_pcie_set/clear_dbi_mode()
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-keystone-relocate-ks_pcie_set-clear_dbi_mode.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 98a2444a5d44b3618f0b03c5954053a68fce0237
Author: Siddharth Vadapalli <s-vadapalli@xxxxxx>
Date: Thu Mar 28 14:20:40 2024 +0530
PCI: keystone: Relocate ks_pcie_set/clear_dbi_mode()
[ Upstream commit 5125fdc3292eea20870d4e6cefa62dc1245ce7ec ]
Relocate ks_pcie_set_dbi_mode() and ks_pcie_clear_dbi_mode() to avoid
forward declaration in a subsequent patch. No functional change intended.
Link: https://lore.kernel.org/linux-pci/20240328085041.2916899-2-s-vadapalli@xxxxxx
Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Stable-dep-of: 9ffa0e70b2da ("PCI: keystone: Don't enable BAR 0 for AM654x")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index cf3836561316d..bf907c8ca25bb 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -246,6 +246,48 @@ static struct irq_chip ks_pcie_msi_irq_chip = {
.irq_unmask = ks_pcie_msi_unmask,
};
+/**
+ * ks_pcie_set_dbi_mode() - Set DBI mode to access overlaid BAR mask registers
+ * @ks_pcie: A pointer to the keystone_pcie structure which holds the KeyStone
+ * PCIe host controller driver information.
+ *
+ * Since modification of dbi_cs2 involves different clock domain, read the
+ * status back to ensure the transition is complete.
+ */
+static void ks_pcie_set_dbi_mode(struct keystone_pcie *ks_pcie)
+{
+ u32 val;
+
+ val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
+ val |= DBI_CS2;
+ ks_pcie_app_writel(ks_pcie, CMD_STATUS, val);
+
+ do {
+ val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
+ } while (!(val & DBI_CS2));
+}
+
+/**
+ * ks_pcie_clear_dbi_mode() - Disable DBI mode
+ * @ks_pcie: A pointer to the keystone_pcie structure which holds the KeyStone
+ * PCIe host controller driver information.
+ *
+ * Since modification of dbi_cs2 involves different clock domain, read the
+ * status back to ensure the transition is complete.
+ */
+static void ks_pcie_clear_dbi_mode(struct keystone_pcie *ks_pcie)
+{
+ u32 val;
+
+ val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
+ val &= ~DBI_CS2;
+ ks_pcie_app_writel(ks_pcie, CMD_STATUS, val);
+
+ do {
+ val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
+ } while (val & DBI_CS2);
+}
+
static int ks_pcie_msi_host_init(struct dw_pcie_rp *pp)
{
pp->msi_irq_chip = &ks_pcie_msi_irq_chip;
@@ -342,48 +384,6 @@ static const struct irq_domain_ops ks_pcie_legacy_irq_domain_ops = {
.xlate = irq_domain_xlate_onetwocell,
};
-/**
- * ks_pcie_set_dbi_mode() - Set DBI mode to access overlaid BAR mask registers
- * @ks_pcie: A pointer to the keystone_pcie structure which holds the KeyStone
- * PCIe host controller driver information.
- *
- * Since modification of dbi_cs2 involves different clock domain, read the
- * status back to ensure the transition is complete.
- */
-static void ks_pcie_set_dbi_mode(struct keystone_pcie *ks_pcie)
-{
- u32 val;
-
- val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
- val |= DBI_CS2;
- ks_pcie_app_writel(ks_pcie, CMD_STATUS, val);
-
- do {
- val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
- } while (!(val & DBI_CS2));
-}
-
-/**
- * ks_pcie_clear_dbi_mode() - Disable DBI mode
- * @ks_pcie: A pointer to the keystone_pcie structure which holds the KeyStone
- * PCIe host controller driver information.
- *
- * Since modification of dbi_cs2 involves different clock domain, read the
- * status back to ensure the transition is complete.
- */
-static void ks_pcie_clear_dbi_mode(struct keystone_pcie *ks_pcie)
-{
- u32 val;
-
- val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
- val &= ~DBI_CS2;
- ks_pcie_app_writel(ks_pcie, CMD_STATUS, val);
-
- do {
- val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
- } while (val & DBI_CS2);
-}
-
static void ks_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie)
{
u32 val;
