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PCI: cadence: Add support to build pcie-cadence library as a kernel module

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Currently, the Cadence PCIe controller driver can be built as a built-in
module only. Since PCIe functionality is not a necessity for booting, add
support to build the Cadence PCIe driver as a loadable module as well.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://patch.msgid.link/20250417124408.2752248-2-s-vadapalli@ti.com
This commit is contained in:
Kishon Vijay Abraham I 2025-04-17 18:14:05 +05:30 committed by Bjorn Helgaas
parent 16b2da850f
commit f876904e44
5 changed files with 32 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/pci/controller/cadence/Kconfig
View File

@ -4,16 +4,16 @@ menu "Cadence-based PCIe controllers"
depends on PCI
config PCIE_CADENCE
bool
tristate
config PCIE_CADENCE_HOST
bool
tristate
depends on OF
select IRQ_DOMAIN
select PCIE_CADENCE
config PCIE_CADENCE_EP
bool
tristate
depends on OF
depends on PCI_ENDPOINT
select PCIE_CADENCE

6
drivers/pci/controller/cadence/pcie-cadence-ep.c
View File

@ -6,6 +6,7 @@
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pci-epc.h>
#include <linux/platform_device.h>
@ -752,3 +753,8 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
return ret;
}
EXPORT_SYMBOL_GPL(cdns_pcie_ep_setup);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cadence PCIe endpoint controller driver");
MODULE_AUTHOR("Cyrille Pitchen <cyrille.pitchen@free-electrons.com>");

9
drivers/pci/controller/cadence/pcie-cadence-host.c
View File

@ -5,6 +5,7 @@
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/list_sort.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
@ -72,6 +73,7 @@ void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
return rc->cfg_base + (where & 0xfff);
}
EXPORT_SYMBOL_GPL(cdns_pci_map_bus);
static struct pci_ops cdns_pcie_host_ops = {
.map_bus = cdns_pci_map_bus,
@ -495,6 +497,7 @@ int cdns_pcie_host_init(struct cdns_pcie_rc *rc)
return cdns_pcie_host_init_address_translation(rc);
}
EXPORT_SYMBOL_GPL(cdns_pcie_host_init);
int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc)
{
@ -519,6 +522,7 @@ int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc)
return 0;
}
EXPORT_SYMBOL_GPL(cdns_pcie_host_link_setup);
int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
{
@ -572,3 +576,8 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
return pci_host_probe(bridge);
}
EXPORT_SYMBOL_GPL(cdns_pcie_host_setup);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cadence PCIe host controller driver");
MODULE_AUTHOR("Cyrille Pitchen <cyrille.pitchen@free-electrons.com>");

12
drivers/pci/controller/cadence/pcie-cadence.c
View File

@ -4,6 +4,7 @@
// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include "pcie-cadence.h"
@ -23,6 +24,7 @@ void cdns_pcie_detect_quiet_min_delay_set(struct cdns_pcie *pcie)
cdns_pcie_writel(pcie, CDNS_PCIE_LTSSM_CONTROL_CAP, ltssm_control_cap);
}
EXPORT_SYMBOL_GPL(cdns_pcie_detect_quiet_min_delay_set);
void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn,
u32 r, bool is_io,
@ -100,6 +102,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn,
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r), addr0);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r), addr1);
}
EXPORT_SYMBOL_GPL(cdns_pcie_set_outbound_region);
void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie,
u8 busnr, u8 fn,
@ -134,6 +137,7 @@ void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie,
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r), addr0);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r), addr1);
}
EXPORT_SYMBOL_GPL(cdns_pcie_set_outbound_region_for_normal_msg);
void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r)
{
@ -146,6 +150,7 @@ void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r)
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r), 0);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r), 0);
}
EXPORT_SYMBOL_GPL(cdns_pcie_reset_outbound_region);
void cdns_pcie_disable_phy(struct cdns_pcie *pcie)
{
@ -156,6 +161,7 @@ void cdns_pcie_disable_phy(struct cdns_pcie *pcie)
phy_exit(pcie->phy[i]);
}
}
EXPORT_SYMBOL_GPL(cdns_pcie_disable_phy);
int cdns_pcie_enable_phy(struct cdns_pcie *pcie)
{
@ -184,6 +190,7 @@ int cdns_pcie_enable_phy(struct cdns_pcie *pcie)
return ret;
}
EXPORT_SYMBOL_GPL(cdns_pcie_enable_phy);
int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)
{
@ -243,6 +250,7 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)
return ret;
}
EXPORT_SYMBOL_GPL(cdns_pcie_init_phy);
static int cdns_pcie_suspend_noirq(struct device *dev)
{
@ -271,3 +279,7 @@ const struct dev_pm_ops cdns_pcie_pm_ops = {
NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq,
cdns_pcie_resume_noirq)
};
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cadence PCIe controller driver");
MODULE_AUTHOR("Cyrille Pitchen <cyrille.pitchen@free-electrons.com>");

4
drivers/pci/controller/cadence/pcie-cadence.h
View File

@ -508,7 +508,7 @@ static inline bool cdns_pcie_link_up(struct cdns_pcie *pcie)
return true;
}
#ifdef CONFIG_PCIE_CADENCE_HOST
#if IS_ENABLED(CONFIG_PCIE_CADENCE_HOST)
int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc);
int cdns_pcie_host_init(struct cdns_pcie_rc *rc);
int cdns_pcie_host_setup(struct cdns_pcie_rc *rc);
@ -537,7 +537,7 @@ static inline void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int d
}
#endif
#ifdef CONFIG_PCIE_CADENCE_EP
#if IS_ENABLED(CONFIG_PCIE_CADENCE_EP)
int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep);
#else
static inline int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)