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PCI: keystone: Relocate ks_pcie_set/clear_dbi_mode()

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[ Upstream commit 5125fdc329 ]

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@ti.com
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Stable-dep-of: 9ffa0e70b2 ("PCI: keystone: Don't enable BAR 0 for AM654x")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Siddharth Vadapalli 2024-03-28 14:20:40 +05:30 committed by Greg Kroah-Hartman
parent 4cd2eca07f
commit 764d75ce55
1 changed files with 42 additions and 42 deletions
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84
drivers/pci/controller/dwc/pci-keystone.c
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@ -246,6 +246,48 @@ static struct irq_chip ks_pcie_msi_irq_chip = {
.irq_unmask = ks_pcie_msi_unmask, .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) static int ks_pcie_msi_host_init(struct dw_pcie_rp *pp)
{ {
pp->msi_irq_chip = &ks_pcie_msi_irq_chip; 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, .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) static void ks_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie)
{ {
u32 val; u32 val;