This patchset final purpose is add PCIe driver for StarFive JH7110 SoC.
JH7110 using PLDA XpressRICH PCIe IP. Microchip PolarFire Using the
same IP and have commit their codes, which are mixed with PLDA
controller codes and Microchip platform codes.
For re-use the PLDA controller codes, I request refactoring microchip
codes, move PLDA common codes to PLDA files.
Desigware and Cadence is good example for refactoring codes.
----------------------------------------------------------
The refactoring patches total number is 17,(patch 1-17)
which do NOT contain changing logic of codes.
These patches just contain three type basic operations.
(rename, modify codes to support starfive platform, and moving to common file)
If these patched are all be reviewed. They can be accepted first.
Refactoring patches can be devided to different groups
1. (patch 1- 3 is the prepare work of refactoring)
patch1 is move PLDA XpressRICH PCIe host common properties dt-binding
docs from microchip,pcie-host.yaml
patch2 is move PolarFire codes to PLDA directory.
patch3 is move PLDA IP register macros to plda-pcie.h
2. (patch4 - 6 is processing and re-use PCIe host instance)
patch4 is add bridge_addr field to PCIe host instance.
patch5 is rename data structure in microchip codes.
patch6 is moving two data structures to head file
3. (patch 7 - 9 are for re-use two PCIe setup function)
patch7 is rename two setup functions in microchip codes, prepare to move
to common file.
patch8 is change the arguments of plda_pcie_setup_iomems()
patch9 is move the two setup functions to common file pcie-plda-host.c
4.(patch 10 - 17 are for re-use interupt processing codes)
patch10 add a plda default event handler function.
patch11 is rename the IRQ related functions, prepare to move to
pcie-plda-host.c
patch 12 - 16 is modify the interrupt event codes, preparing for support starfive
and microchip two platforms.
patch17 is move IRQ related functions to pcie-plda-host.c
------------------------------------------------------------
The remainder patches (patch 18 -22) are not refactoring patch.
They are for adding StarFive codes and dont modify the microchip's
codes.
patch18 is set plda_event_handler to static.
patch19 is Add PLDA event interrupt codes and IRQ domain ops.
patch20 is add StarFive JH7110 PCIe dt-binding doc.
patch21 is add StarFive JH7110 Soc PCIe codes.
patch22 is Starfive dts config
This patchset is base on v6.6-rc5
previous version:
v3:https://patchwork.kernel.org/project/linux-pci/cover/[email protected]/
v4:https://patchwork.kernel.org/project/linux-pci/cover/[email protected]/
v5:https://patchwork.kernel.org/project/linux-pci/cover/[email protected]/
v6:https://patchwork.kernel.org/project/linux-pci/cover/[email protected]/
v7:https://patchwork.kernel.org/project/linux-pci/cover/[email protected]/
change:
v8:
The patch description in cover-letter has been changed.
v7 patch 4 split to v8 patch 4 - 6.
(It is patches about re-use pcie host data structure, new patches just contain one
function modification. It is more reguluar and easier to review).
patch 7- 9: modify the commit messages and add reason of
modifcation.
patch10 : just new add a default event handler.
The PLDA event interrupt codes has been moved to patch19.
patch11- 17 :
Add review tag and add more commit messages to declear the
reason of modifying the codes.
patch19: plda_handle_events() using bit mask macro. The function are
easier to read.
v7:
patch19: fix the build warning.
patch21: Some format changes (Emil's comment)
patch22: change the pcie node sequences by alphabetical
delete the "interupt-parent" in pcie node.
v6:
v5 patch 4 split to patch 4 -9. New patches just contain one
function modification. It is more reguluar.
patch 9: Just move the two setup functions only
patch 19 : draw a graph of PLDA local register, make it easier to
review the codes.
v5 patch 7 split to patch 11- 17. Each patch just contain one
function modification. It is more regular.
patch 11: rename IRQ related functions.
patch 12 - 16 : modify the events codes, total five patch.
patch 17: move IRQ related functions to pcie-plda-host.c
patch 18: Add new patch 18.
patch 21- 22 using "linux,pci-domain" dts setting.
v5:
patch 10 -17:
- Some variables names changed (evt->event).
- plda_handle_event() using a unify callback function to get events
num.
- Add plda_event_ops data structure.
patch 21:
Add plda_event_ops instances.
v4:
patch 3:
Copy the interrupt events macros to pcie-plda-host.c
patch 15:
get_events() change in patch 7. Patch 8 is just move the codes.
other change:
All the functions in commit message add ().
v3:
patch 2- 19:
- splite refactoring patches to multiple patch.
- rename plda_pcie to plda_pcie_rp. Maybe other vendor will
upstream PLDA ep codes.
patch 20:
- Remove the redundant reference.
- move the offset value to codes in starfive,stg-syscon
- change reset-gpio to prest-gpio.
patch 21:
- Add 100ms delay after preset for PCIe 6.0 spec.
- stg-syscon related modification.
patch 22:
- Add dts configure.
Minda Chen (22):
dt-bindings: PCI: Add PLDA XpressRICH PCIe host common properties
PCI: microchip: Move pcie-microchip-host.c to plda directory
PCI: microchip: Move PLDA IP register macros to pcie-plda.h
PCI: microchip: Add bridge_addr field to struct mc_pcie
PCI: microchip: Rename two PCIe data structures
PCI: microchip: Move PCIe host data structure to plda-pcie.h
PCI: microchip: Rename two setup functions
PCI: microchip: Change the argument of plda_pcie_setup_iomems()
PCI: microchip: Move the setup functions to pcie-plda-host.c
PCI: plda: Add PLDA default event IRQ handler
PCI: microchip: Rename interrupt related functions
PCI: microchip: Add num_events field to struct plda_pcie_rp
PCI: microchip: Add request_event_irq() callback function
PCI: microchip: Add INTx and MSI event num to struct plda_event
PCI: microchip: Add get_events() callback function
PCI: microchip: Add event IRQ domain ops to struct plda_event
PCI: microchip: Move IRQ functions to pcie-plda-host.c
PCI: plda: Set plda_event_handler() to static
PCI: plda: Add event interrupt codes and IRQ domain ops
dt-bindings: PCI: Add StarFive JH7110 PCIe controller
PCI: starfive: Add JH7110 PCIe controller
riscv: dts: starfive: add PCIe dts configuration for JH7110
.../bindings/pci/microchip,pcie-host.yaml | 55 +-
.../pci/plda,xpressrich3-axi-common.yaml | 75 ++
.../bindings/pci/starfive,jh7110-pcie.yaml | 120 ++++
MAINTAINERS | 19 +-
.../jh7110-starfive-visionfive-2.dtsi | 64 ++
arch/riscv/boot/dts/starfive/jh7110.dtsi | 86 +++
drivers/pci/controller/Kconfig | 9 +-
drivers/pci/controller/Makefile | 2 +-
drivers/pci/controller/plda/Kconfig | 30 +
drivers/pci/controller/plda/Makefile | 4 +
.../{ => plda}/pcie-microchip-host.c | 602 ++--------------
drivers/pci/controller/plda/pcie-plda-host.c | 657 ++++++++++++++++++
drivers/pci/controller/plda/pcie-plda.h | 268 +++++++
drivers/pci/controller/plda/pcie-starfive.c | 448 ++++++++++++
14 files changed, 1835 insertions(+), 604 deletions(-)
create mode 100644 Documentation/devicetree/bindings/pci/plda,xpressrich3-axi-common.yaml
create mode 100644 Documentation/devicetree/bindings/pci/starfive,jh7110-pcie.yaml
create mode 100644 drivers/pci/controller/plda/Kconfig
create mode 100644 drivers/pci/controller/plda/Makefile
rename drivers/pci/controller/{ => plda}/pcie-microchip-host.c (54%)
create mode 100644 drivers/pci/controller/plda/pcie-plda-host.c
create mode 100644 drivers/pci/controller/plda/pcie-plda.h
create mode 100644 drivers/pci/controller/plda/pcie-starfive.c
base-commit: 94f6f0550c625fab1f373bb86a6669b45e9748b3
--
2.17.1
Move the common data structures definition to head file for
these data structure can be re-used.
Signed-off-by: Minda Chen <[email protected]>
---
.../pci/controller/plda/pcie-microchip-host.c | 20 ------------------
drivers/pci/controller/plda/pcie-plda.h | 21 +++++++++++++++++++
2 files changed, 21 insertions(+), 20 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 3dc4d4ca9d0c..261147a0a446 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -21,9 +21,6 @@
#include "../../pci.h"
#include "pcie-plda.h"
-/* Number of MSI IRQs */
-#define PLDA_MAX_NUM_MSI_IRQS 32
-
/* PCIe Bridge Phy and Controller Phy offsets */
#define MC_PCIE1_BRIDGE_ADDR 0x00008000u
#define MC_PCIE1_CTRL_ADDR 0x0000a000u
@@ -179,23 +176,6 @@ struct event_map {
u32 event_bit;
};
-struct plda_msi {
- struct mutex lock; /* Protect used bitmap */
- struct irq_domain *msi_domain;
- struct irq_domain *dev_domain;
- u32 num_vectors;
- u64 vector_phy;
- DECLARE_BITMAP(used, PLDA_MAX_NUM_MSI_IRQS);
-};
-
-struct plda_pcie_rp {
- struct device *dev;
- struct irq_domain *intx_domain;
- struct irq_domain *event_domain;
- raw_spinlock_t lock;
- struct plda_msi msi;
- void __iomem *bridge_addr;
-};
struct mc_pcie {
struct plda_pcie_rp plda;
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 727fc54312c9..363fcbbaf6ec 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -6,6 +6,9 @@
#ifndef _PCIE_PLDA_H
#define _PCIE_PLDA_H
+/* Number of MSI IRQs */
+#define PLDA_MAX_NUM_MSI_IRQS 32
+
/* PCIe Bridge Phy Regs */
#define PCIE_PCI_IRQ_DW0 0xa8
#define MSIX_CAP_MASK BIT(31)
@@ -99,4 +102,22 @@
#define EVENT_PM_MSI_INT_SYS_ERR 12
#define NUM_PLDA_EVENTS 13
+struct plda_msi {
+ struct mutex lock; /* Protect used bitmap */
+ struct irq_domain *msi_domain;
+ struct irq_domain *dev_domain;
+ u32 num_vectors;
+ u64 vector_phy;
+ DECLARE_BITMAP(used, PLDA_MAX_NUM_MSI_IRQS);
+};
+
+struct plda_pcie_rp {
+ struct device *dev;
+ struct irq_domain *intx_domain;
+ struct irq_domain *event_domain;
+ raw_spinlock_t lock;
+ struct plda_msi msi;
+ void __iomem *bridge_addr;
+};
+
#endif
--
2.17.1
Add PLDA default event IRQ handler.
This is first patch of refactoring IRQ handling codes.
The handler function will be referenced by later patch.
Signed-off-by: Minda Chen <[email protected]>
---
drivers/pci/controller/plda/pcie-plda-host.c | 5 +++++
drivers/pci/controller/plda/pcie-plda.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
index 19131181897f..21ca6b460f5e 100644
--- a/drivers/pci/controller/plda/pcie-plda-host.c
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -18,6 +18,11 @@
#include "pcie-plda.h"
+irqreturn_t plda_event_handler(int irq, void *dev_id)
+{
+ return IRQ_HANDLED;
+}
+
void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
phys_addr_t axi_addr, phys_addr_t pci_addr,
size_t size)
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 3deefd35fa5a..7ff7ff44c980 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -120,6 +120,7 @@ struct plda_pcie_rp {
void __iomem *bridge_addr;
};
+irqreturn_t plda_event_handler(int irq, void *dev_id);
void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
phys_addr_t axi_addr, phys_addr_t pci_addr,
size_t size);
--
2.17.1
If other vendor do not select PCI_HOST_COMMON,
The driver data is not struct pci_host_bridge.
So move calling platform_get_drvdata() to
mc_platform_init().
Signed-off-by: Minda Chen <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
---
drivers/pci/controller/plda/pcie-microchip-host.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 4877d130ee4c..31ca8d44ee2a 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -876,11 +876,10 @@ static void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
writel(0, bridge_base_addr + ATR0_PCIE_WIN0_SRC_ADDR);
}
-static int plda_pcie_setup_iomems(struct platform_device *pdev,
+static int plda_pcie_setup_iomems(struct pci_host_bridge *bridge,
struct plda_pcie_rp *port)
{
void __iomem *bridge_base_addr = port->bridge_addr;
- struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
struct resource_entry *entry;
u64 pci_addr;
u32 index = 1;
@@ -1018,6 +1017,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
{
struct device *dev = cfg->parent;
struct platform_device *pdev = to_platform_device(dev);
+ struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
void __iomem *bridge_base_addr =
port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
int ret;
@@ -1031,7 +1031,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
mc_pcie_enable_msi(port, cfg->win);
/* Configure non-config space outbound ranges */
- ret = plda_pcie_setup_iomems(pdev, &port->plda);
+ ret = plda_pcie_setup_iomems(bridge, &port->plda);
if (ret)
return ret;
--
2.17.1
The INTx and MSI interrupt event num is different in Microchip and
StarFive platform.
Signed-off-by: Minda Chen <[email protected]>
Acked-by: Conor Dooley <[email protected]>
---
drivers/pci/controller/plda/pcie-microchip-host.c | 6 ++++--
drivers/pci/controller/plda/pcie-plda.h | 2 ++
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 104332603e25..e99498b5b563 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -808,6 +808,8 @@ static int mc_request_event_irq(struct plda_pcie_rp *plda, int event_irq,
static const struct plda_event mc_event = {
.request_event_irq = mc_request_event_irq,
+ .intx_event = EVENT_LOCAL_PM_MSI_INT_INTX,
+ .msi_event = EVENT_LOCAL_PM_MSI_INT_MSI,
};
static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
@@ -948,7 +950,7 @@ static int plda_init_interrupts(struct platform_device *pdev,
}
intx_irq = irq_create_mapping(port->event_domain,
- EVENT_LOCAL_PM_MSI_INT_INTX);
+ event->intx_event);
if (!intx_irq) {
dev_err(dev, "failed to map INTx interrupt\n");
return -ENXIO;
@@ -958,7 +960,7 @@ static int plda_init_interrupts(struct platform_device *pdev,
irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port);
msi_irq = irq_create_mapping(port->event_domain,
- EVENT_LOCAL_PM_MSI_INT_MSI);
+ event->msi_event);
if (!msi_irq)
return -ENXIO;
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 907ad40f3188..5ad1b81c0086 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -124,6 +124,8 @@ struct plda_pcie_rp {
struct plda_event {
int (*request_event_irq)(struct plda_pcie_rp *pcie,
int event_irq, int event);
+ int intx_event;
+ int msi_event;
};
irqreturn_t plda_event_handler(int irq, void *dev_id);
--
2.17.1
PolarFire implements specific interrupts besides PLDA local
interrupt and register their interrupt symbol name. (Total 28
interrupts while PLDA contain 13 local interrupts). and
interrupt to event mapping is different.
So add a callback function to support different IRQ register
function.
Signed-off-by: Minda Chen <[email protected]>
---
.../pci/controller/plda/pcie-microchip-host.c | 25 ++++++++++++++++---
drivers/pci/controller/plda/pcie-plda.h | 5 ++++
2 files changed, 26 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 1799455989ac..104332603e25 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -799,6 +799,17 @@ static int mc_pcie_init_clks(struct device *dev)
return 0;
}
+static int mc_request_event_irq(struct plda_pcie_rp *plda, int event_irq,
+ int event)
+{
+ return devm_request_irq(plda->dev, event_irq, mc_event_handler,
+ 0, event_cause[event].sym, plda);
+}
+
+static const struct plda_event mc_event = {
+ .request_event_irq = mc_request_event_irq,
+};
+
static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
{
struct device *dev = port->dev;
@@ -898,7 +909,9 @@ static void mc_disable_interrupts(struct mc_pcie *port)
writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
}
-static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port)
+static int plda_init_interrupts(struct platform_device *pdev,
+ struct plda_pcie_rp *port,
+ const struct plda_event *event)
{
struct device *dev = &pdev->dev;
int irq;
@@ -922,8 +935,12 @@ static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_r
return -ENXIO;
}
- ret = devm_request_irq(dev, event_irq, mc_event_handler,
- 0, event_cause[i].sym, port);
+ if (event->request_event_irq)
+ ret = event->request_event_irq(port, event_irq, i);
+ else
+ ret = devm_request_irq(dev, event_irq, plda_event_handler,
+ 0, NULL, port);
+
if (ret) {
dev_err(dev, "failed to request IRQ %d\n", event_irq);
return ret;
@@ -977,7 +994,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
return ret;
/* Address translation is up; safe to enable interrupts */
- ret = plda_init_interrupts(pdev, &port->plda);
+ ret = plda_init_interrupts(pdev, &port->plda, &mc_event);
if (ret)
return ret;
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index b439160448b1..907ad40f3188 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -121,6 +121,11 @@ struct plda_pcie_rp {
int num_events;
};
+struct plda_event {
+ int (*request_event_irq)(struct plda_pcie_rp *pcie,
+ int event_irq, int event);
+};
+
irqreturn_t plda_event_handler(int irq, void *dev_id);
void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
phys_addr_t axi_addr, phys_addr_t pci_addr,
--
2.17.1
Move setup functions to common pcie-plda-host.c.
So these two functions can be re-used.
Signed-off-by: Minda Chen <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
---
drivers/pci/controller/plda/Kconfig | 4 +
drivers/pci/controller/plda/Makefile | 1 +
.../pci/controller/plda/pcie-microchip-host.c | 59 --------------
drivers/pci/controller/plda/pcie-plda-host.c | 80 +++++++++++++++++++
drivers/pci/controller/plda/pcie-plda.h | 5 ++
5 files changed, 90 insertions(+), 59 deletions(-)
create mode 100644 drivers/pci/controller/plda/pcie-plda-host.c
diff --git a/drivers/pci/controller/plda/Kconfig b/drivers/pci/controller/plda/Kconfig
index 5cb3be4fc98c..e54a82ee94f5 100644
--- a/drivers/pci/controller/plda/Kconfig
+++ b/drivers/pci/controller/plda/Kconfig
@@ -3,10 +3,14 @@
menu "PLDA-based PCIe controllers"
depends on PCI
+config PCIE_PLDA_HOST
+ bool
+
config PCIE_MICROCHIP_HOST
tristate "Microchip AXI PCIe controller"
depends on PCI_MSI && OF
select PCI_HOST_COMMON
+ select PCIE_PLDA_HOST
help
Say Y here if you want kernel to support the Microchip AXI PCIe
Host Bridge driver.
diff --git a/drivers/pci/controller/plda/Makefile b/drivers/pci/controller/plda/Makefile
index e1a265cbf91c..4340ab007f44 100644
--- a/drivers/pci/controller/plda/Makefile
+++ b/drivers/pci/controller/plda/Makefile
@@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PCIE_PLDA_HOST) += pcie-plda-host.o
obj-$(CONFIG_PCIE_MICROCHIP_HOST) += pcie-microchip-host.o
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 31ca8d44ee2a..2e79bcc7c0a5 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -838,65 +838,6 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
return mc_allocate_msi_domains(port);
}
-static void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
- phys_addr_t axi_addr, phys_addr_t pci_addr,
- size_t size)
-{
- u32 atr_sz = ilog2(size) - 1;
- u32 val;
-
- if (index == 0)
- val = PCIE_CONFIG_INTERFACE;
- else
- val = PCIE_TX_RX_INTERFACE;
-
- writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
- ATR0_AXI4_SLV0_TRSL_PARAM);
-
- val = lower_32_bits(axi_addr) | (atr_sz << ATR_SIZE_SHIFT) |
- ATR_IMPL_ENABLE;
- writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
- ATR0_AXI4_SLV0_SRCADDR_PARAM);
-
- val = upper_32_bits(axi_addr);
- writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
- ATR0_AXI4_SLV0_SRC_ADDR);
-
- val = lower_32_bits(pci_addr);
- writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
- ATR0_AXI4_SLV0_TRSL_ADDR_LSB);
-
- val = upper_32_bits(pci_addr);
- writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
- ATR0_AXI4_SLV0_TRSL_ADDR_UDW);
-
- val = readl(bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
- val |= (ATR0_PCIE_ATR_SIZE << ATR0_PCIE_ATR_SIZE_SHIFT);
- writel(val, bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
- writel(0, bridge_base_addr + ATR0_PCIE_WIN0_SRC_ADDR);
-}
-
-static int plda_pcie_setup_iomems(struct pci_host_bridge *bridge,
- struct plda_pcie_rp *port)
-{
- void __iomem *bridge_base_addr = port->bridge_addr;
- struct resource_entry *entry;
- u64 pci_addr;
- u32 index = 1;
-
- resource_list_for_each_entry(entry, &bridge->windows) {
- if (resource_type(entry->res) == IORESOURCE_MEM) {
- pci_addr = entry->res->start - entry->offset;
- plda_pcie_setup_window(bridge_base_addr, index,
- entry->res->start, pci_addr,
- resource_size(entry->res));
- index++;
- }
- }
-
- return 0;
-}
-
static inline void mc_clear_secs(struct mc_pcie *port)
{
void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR;
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
new file mode 100644
index 000000000000..19131181897f
--- /dev/null
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PLDA PCIe XpressRich host controller driver
+ *
+ * Copyright (C) 2023 Microchip Co. Ltd
+ *
+ * Author: Daire McNamara <[email protected]>
+ */
+
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/msi.h>
+#include <linux/of_address.h>
+#include <linux/of_pci.h>
+#include <linux/pci_regs.h>
+#include <linux/pci-ecam.h>
+#include <linux/platform_device.h>
+
+#include "pcie-plda.h"
+
+void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
+ phys_addr_t axi_addr, phys_addr_t pci_addr,
+ size_t size)
+{
+ u32 atr_sz = ilog2(size) - 1;
+ u32 val;
+
+ if (index == 0)
+ val = PCIE_CONFIG_INTERFACE;
+ else
+ val = PCIE_TX_RX_INTERFACE;
+
+ writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+ ATR0_AXI4_SLV0_TRSL_PARAM);
+
+ val = lower_32_bits(axi_addr) | (atr_sz << ATR_SIZE_SHIFT) |
+ ATR_IMPL_ENABLE;
+ writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+ ATR0_AXI4_SLV0_SRCADDR_PARAM);
+
+ val = upper_32_bits(axi_addr);
+ writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+ ATR0_AXI4_SLV0_SRC_ADDR);
+
+ val = lower_32_bits(pci_addr);
+ writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+ ATR0_AXI4_SLV0_TRSL_ADDR_LSB);
+
+ val = upper_32_bits(pci_addr);
+ writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+ ATR0_AXI4_SLV0_TRSL_ADDR_UDW);
+
+ val = readl(bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
+ val |= (ATR0_PCIE_ATR_SIZE << ATR0_PCIE_ATR_SIZE_SHIFT);
+ writel(val, bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
+ writel(0, bridge_base_addr + ATR0_PCIE_WIN0_SRC_ADDR);
+}
+EXPORT_SYMBOL_GPL(plda_pcie_setup_window);
+
+int plda_pcie_setup_iomems(struct pci_host_bridge *bridge,
+ struct plda_pcie_rp *port)
+{
+ void __iomem *bridge_base_addr = port->bridge_addr;
+ struct resource_entry *entry;
+ u64 pci_addr;
+ u32 index = 1;
+
+ resource_list_for_each_entry(entry, &bridge->windows) {
+ if (resource_type(entry->res) == IORESOURCE_MEM) {
+ pci_addr = entry->res->start - entry->offset;
+ plda_pcie_setup_window(bridge_base_addr, index,
+ entry->res->start, pci_addr,
+ resource_size(entry->res));
+ index++;
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(plda_pcie_setup_iomems);
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 363fcbbaf6ec..3deefd35fa5a 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -120,4 +120,9 @@ struct plda_pcie_rp {
void __iomem *bridge_addr;
};
+void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
+ phys_addr_t axi_addr, phys_addr_t pci_addr,
+ size_t size);
+int plda_pcie_setup_iomems(struct pci_host_bridge *bridge,
+ struct plda_pcie_rp *port);
#endif
--
2.17.1
PolarFire Implements none-PLDA event interrupts. So the whole event
domain ops can not be re-used.
PLDA event domain ops instances will be implemented
in later patch.
Signed-off-by: Minda Chen <[email protected]>
---
drivers/pci/controller/plda/pcie-microchip-host.c | 9 ++++++---
drivers/pci/controller/plda/pcie-plda.h | 1 +
2 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index fca1520d56c9..2825c1f5563d 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -811,13 +811,15 @@ static const struct plda_event_ops mc_event_ops = {
};
static const struct plda_event mc_event = {
+ .domain_ops = &mc_event_domain_ops,
.event_ops = &mc_event_ops,
.request_event_irq = mc_request_event_irq,
.intx_event = EVENT_LOCAL_PM_MSI_INT_INTX,
.msi_event = EVENT_LOCAL_PM_MSI_INT_MSI,
};
-static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
+static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port,
+ const struct irq_domain_ops *ops)
{
struct device *dev = port->dev;
struct device_node *node = dev->of_node;
@@ -831,7 +833,8 @@ static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
}
port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events,
- &mc_event_domain_ops, port);
+ ops, port);
+
if (!port->event_domain) {
dev_err(dev, "failed to get event domain\n");
of_node_put(pcie_intc_node);
@@ -930,7 +933,7 @@ static int plda_init_interrupts(struct platform_device *pdev,
return -EINVAL;
}
- ret = plda_pcie_init_irq_domains(port);
+ ret = plda_pcie_init_irq_domains(port, event->domain_ops);
if (ret) {
dev_err(dev, "failed creating IRQ domains\n");
return ret;
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 6571a4befac9..080932cbe8c4 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -129,6 +129,7 @@ struct plda_pcie_rp {
};
struct plda_event {
+ const struct irq_domain_ops *domain_ops;
const struct plda_event_ops *event_ops;
int (*request_event_irq)(struct plda_pcie_rp *pcie,
int event_irq, int event);
--
2.17.1
Rename mc_* to plda_* for IRQ functions and related
IRQ domain ops data instances.
MSI, INTx interrupt codes and IRQ init codes are all
can be re-used.
- function rename list:
mc_allocate_msi_domains() --> plda_allocate_msi_domains()
mc_init_interrupts() --> plda_init_interrupts()
mc_pcie_init_irq_domain() --> plda_pcie_init_irq_domains()
mc_handle_event() --> plda_handle_event()
get_events() --> mc_get_events()
MSI interrupts related functions and IRQ domain
(primary function is mc_handle_msi()):
mc_handle_msi() --> plda_handle_msi()
INTx interrupts related functions and IRQ domain
(primary function is mc_handle_intx()):
mc_handle_intx() --> plda_handle_intx()
Signed-off-by: Minda Chen <[email protected]>
Acked-by: Conor Dooley <[email protected]>
---
.../pci/controller/plda/pcie-microchip-host.c | 98 +++++++++----------
1 file changed, 49 insertions(+), 49 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 2e79bcc7c0a5..5a20d5a03d36 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -318,7 +318,7 @@ static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam)
ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_ADDRESS_HI);
}
-static void mc_handle_msi(struct irq_desc *desc)
+static void plda_handle_msi(struct irq_desc *desc)
{
struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -346,7 +346,7 @@ static void mc_handle_msi(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
-static void mc_msi_bottom_irq_ack(struct irq_data *data)
+static void plda_msi_bottom_irq_ack(struct irq_data *data)
{
struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
void __iomem *bridge_base_addr = port->bridge_addr;
@@ -355,7 +355,7 @@ static void mc_msi_bottom_irq_ack(struct irq_data *data)
writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
}
-static void mc_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+static void plda_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
{
struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
phys_addr_t addr = port->msi.vector_phy;
@@ -368,21 +368,21 @@ static void mc_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
(int)data->hwirq, msg->address_hi, msg->address_lo);
}
-static int mc_msi_set_affinity(struct irq_data *irq_data,
- const struct cpumask *mask, bool force)
+static int plda_msi_set_affinity(struct irq_data *irq_data,
+ const struct cpumask *mask, bool force)
{
return -EINVAL;
}
-static struct irq_chip mc_msi_bottom_irq_chip = {
- .name = "Microchip MSI",
- .irq_ack = mc_msi_bottom_irq_ack,
- .irq_compose_msi_msg = mc_compose_msi_msg,
- .irq_set_affinity = mc_msi_set_affinity,
+static struct irq_chip plda_msi_bottom_irq_chip = {
+ .name = "PLDA MSI",
+ .irq_ack = plda_msi_bottom_irq_ack,
+ .irq_compose_msi_msg = plda_compose_msi_msg,
+ .irq_set_affinity = plda_msi_set_affinity,
};
-static int mc_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
- unsigned int nr_irqs, void *args)
+static int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *args)
{
struct plda_pcie_rp *port = domain->host_data;
struct plda_msi *msi = &port->msi;
@@ -397,7 +397,7 @@ static int mc_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
set_bit(bit, msi->used);
- irq_domain_set_info(domain, virq, bit, &mc_msi_bottom_irq_chip,
+ irq_domain_set_info(domain, virq, bit, &plda_msi_bottom_irq_chip,
domain->host_data, handle_edge_irq, NULL, NULL);
mutex_unlock(&msi->lock);
@@ -405,8 +405,8 @@ static int mc_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
return 0;
}
-static void mc_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
- unsigned int nr_irqs)
+static void plda_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs)
{
struct irq_data *d = irq_domain_get_irq_data(domain, virq);
struct plda_pcie_rp *port = irq_data_get_irq_chip_data(d);
@@ -423,24 +423,24 @@ static void mc_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
}
static const struct irq_domain_ops msi_domain_ops = {
- .alloc = mc_irq_msi_domain_alloc,
- .free = mc_irq_msi_domain_free,
+ .alloc = plda_irq_msi_domain_alloc,
+ .free = plda_irq_msi_domain_free,
};
-static struct irq_chip mc_msi_irq_chip = {
- .name = "Microchip PCIe MSI",
+static struct irq_chip plda_msi_irq_chip = {
+ .name = "PLDA PCIe MSI",
.irq_ack = irq_chip_ack_parent,
.irq_mask = pci_msi_mask_irq,
.irq_unmask = pci_msi_unmask_irq,
};
-static struct msi_domain_info mc_msi_domain_info = {
+static struct msi_domain_info plda_msi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
MSI_FLAG_PCI_MSIX),
- .chip = &mc_msi_irq_chip,
+ .chip = &plda_msi_irq_chip,
};
-static int mc_allocate_msi_domains(struct plda_pcie_rp *port)
+static int plda_allocate_msi_domains(struct plda_pcie_rp *port)
{
struct device *dev = port->dev;
struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
@@ -455,7 +455,7 @@ static int mc_allocate_msi_domains(struct plda_pcie_rp *port)
return -ENOMEM;
}
- msi->msi_domain = pci_msi_create_irq_domain(fwnode, &mc_msi_domain_info,
+ msi->msi_domain = pci_msi_create_irq_domain(fwnode, &plda_msi_domain_info,
msi->dev_domain);
if (!msi->msi_domain) {
dev_err(dev, "failed to create MSI domain\n");
@@ -466,7 +466,7 @@ static int mc_allocate_msi_domains(struct plda_pcie_rp *port)
return 0;
}
-static void mc_handle_intx(struct irq_desc *desc)
+static void plda_handle_intx(struct irq_desc *desc)
{
struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -493,7 +493,7 @@ static void mc_handle_intx(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
-static void mc_ack_intx_irq(struct irq_data *data)
+static void plda_ack_intx_irq(struct irq_data *data)
{
struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
void __iomem *bridge_base_addr = port->bridge_addr;
@@ -502,7 +502,7 @@ static void mc_ack_intx_irq(struct irq_data *data)
writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
}
-static void mc_mask_intx_irq(struct irq_data *data)
+static void plda_mask_intx_irq(struct irq_data *data)
{
struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
void __iomem *bridge_base_addr = port->bridge_addr;
@@ -517,7 +517,7 @@ static void mc_mask_intx_irq(struct irq_data *data)
raw_spin_unlock_irqrestore(&port->lock, flags);
}
-static void mc_unmask_intx_irq(struct irq_data *data)
+static void plda_unmask_intx_irq(struct irq_data *data)
{
struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
void __iomem *bridge_base_addr = port->bridge_addr;
@@ -532,24 +532,24 @@ static void mc_unmask_intx_irq(struct irq_data *data)
raw_spin_unlock_irqrestore(&port->lock, flags);
}
-static struct irq_chip mc_intx_irq_chip = {
- .name = "Microchip PCIe INTx",
- .irq_ack = mc_ack_intx_irq,
- .irq_mask = mc_mask_intx_irq,
- .irq_unmask = mc_unmask_intx_irq,
+static struct irq_chip plda_intx_irq_chip = {
+ .name = "PLDA PCIe INTx",
+ .irq_ack = plda_ack_intx_irq,
+ .irq_mask = plda_mask_intx_irq,
+ .irq_unmask = plda_unmask_intx_irq,
};
-static int mc_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
- irq_hw_number_t hwirq)
+static int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
{
- irq_set_chip_and_handler(irq, &mc_intx_irq_chip, handle_level_irq);
+ irq_set_chip_and_handler(irq, &plda_intx_irq_chip, handle_level_irq);
irq_set_chip_data(irq, domain->host_data);
return 0;
}
static const struct irq_domain_ops intx_domain_ops = {
- .map = mc_pcie_intx_map,
+ .map = plda_pcie_intx_map,
};
static inline u32 reg_to_event(u32 reg, struct event_map field)
@@ -609,7 +609,7 @@ static u32 local_events(struct mc_pcie *port)
return val;
}
-static u32 get_events(struct plda_pcie_rp *port)
+static u32 mc_get_events(struct plda_pcie_rp *port)
{
struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda);
u32 events = 0;
@@ -638,7 +638,7 @@ static irqreturn_t mc_event_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static void mc_handle_event(struct irq_desc *desc)
+static void plda_handle_event(struct irq_desc *desc)
{
struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
unsigned long events;
@@ -647,7 +647,7 @@ static void mc_handle_event(struct irq_desc *desc)
chained_irq_enter(chip, desc);
- events = get_events(port);
+ events = mc_get_events(port);
for_each_set_bit(bit, &events, NUM_EVENTS)
generic_handle_domain_irq(port->event_domain, bit);
@@ -750,7 +750,7 @@ static int mc_pcie_event_map(struct irq_domain *domain, unsigned int irq,
return 0;
}
-static const struct irq_domain_ops event_domain_ops = {
+static const struct irq_domain_ops mc_event_domain_ops = {
.map = mc_pcie_event_map,
};
@@ -799,7 +799,7 @@ static int mc_pcie_init_clks(struct device *dev)
return 0;
}
-static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
+static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
{
struct device *dev = port->dev;
struct device_node *node = dev->of_node;
@@ -813,7 +813,7 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
}
port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS,
- &event_domain_ops, port);
+ &mc_event_domain_ops, port);
if (!port->event_domain) {
dev_err(dev, "failed to get event domain\n");
of_node_put(pcie_intc_node);
@@ -835,7 +835,7 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
of_node_put(pcie_intc_node);
raw_spin_lock_init(&port->lock);
- return mc_allocate_msi_domains(port);
+ return plda_allocate_msi_domains(port);
}
static inline void mc_clear_secs(struct mc_pcie *port)
@@ -898,14 +898,14 @@ static void mc_disable_interrupts(struct mc_pcie *port)
writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
}
-static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port)
+static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port)
{
struct device *dev = &pdev->dev;
int irq;
int i, intx_irq, msi_irq, event_irq;
int ret;
- ret = mc_pcie_init_irq_domains(port);
+ ret = plda_pcie_init_irq_domains(port);
if (ret) {
dev_err(dev, "failed creating IRQ domains\n");
return ret;
@@ -938,7 +938,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp
}
/* Plug the INTx chained handler */
- irq_set_chained_handler_and_data(intx_irq, mc_handle_intx, port);
+ irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port);
msi_irq = irq_create_mapping(port->event_domain,
EVENT_LOCAL_PM_MSI_INT_MSI);
@@ -946,10 +946,10 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp
return -ENXIO;
/* Plug the MSI chained handler */
- irq_set_chained_handler_and_data(msi_irq, mc_handle_msi, port);
+ irq_set_chained_handler_and_data(msi_irq, plda_handle_msi, port);
/* Plug the main event chained handler */
- irq_set_chained_handler_and_data(irq, mc_handle_event, port);
+ irq_set_chained_handler_and_data(irq, plda_handle_event, port);
return 0;
}
@@ -977,7 +977,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
return ret;
/* Address translation is up; safe to enable interrupts */
- ret = mc_init_interrupts(pdev, &port->plda);
+ ret = plda_init_interrupts(pdev, &port->plda);
if (ret)
return ret;
--
2.17.1
Move IRQ related functions to pcie-plda-host.c
for re-use these codes. Now Refactoring codes
complete.
Including MSI, INTx, event interrupts and IRQ
init functions.
Signed-off-by: Minda Chen <[email protected]>
Acked-by: Conor Dooley <[email protected]>
---
.../pci/controller/plda/pcie-microchip-host.c | 361 -----------------
drivers/pci/controller/plda/pcie-plda-host.c | 362 ++++++++++++++++++
drivers/pci/controller/plda/pcie-plda.h | 3 +
3 files changed, 365 insertions(+), 361 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 2825c1f5563d..62656a1eb968 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -318,240 +318,6 @@ static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam)
ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_ADDRESS_HI);
}
-static void plda_handle_msi(struct irq_desc *desc)
-{
- struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
- struct irq_chip *chip = irq_desc_get_chip(desc);
- struct device *dev = port->dev;
- struct plda_msi *msi = &port->msi;
- void __iomem *bridge_base_addr = port->bridge_addr;
- unsigned long status;
- u32 bit;
- int ret;
-
- chained_irq_enter(chip, desc);
-
- status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
- if (status & PM_MSI_INT_MSI_MASK) {
- writel_relaxed(status & PM_MSI_INT_MSI_MASK, bridge_base_addr + ISTATUS_LOCAL);
- status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
- for_each_set_bit(bit, &status, msi->num_vectors) {
- ret = generic_handle_domain_irq(msi->dev_domain, bit);
- if (ret)
- dev_err_ratelimited(dev, "bad MSI IRQ %d\n",
- bit);
- }
- }
-
- chained_irq_exit(chip, desc);
-}
-
-static void plda_msi_bottom_irq_ack(struct irq_data *data)
-{
- struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
- void __iomem *bridge_base_addr = port->bridge_addr;
- u32 bitpos = data->hwirq;
-
- writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
-}
-
-static void plda_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
-{
- struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
- phys_addr_t addr = port->msi.vector_phy;
-
- msg->address_lo = lower_32_bits(addr);
- msg->address_hi = upper_32_bits(addr);
- msg->data = data->hwirq;
-
- dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n",
- (int)data->hwirq, msg->address_hi, msg->address_lo);
-}
-
-static int plda_msi_set_affinity(struct irq_data *irq_data,
- const struct cpumask *mask, bool force)
-{
- return -EINVAL;
-}
-
-static struct irq_chip plda_msi_bottom_irq_chip = {
- .name = "PLDA MSI",
- .irq_ack = plda_msi_bottom_irq_ack,
- .irq_compose_msi_msg = plda_compose_msi_msg,
- .irq_set_affinity = plda_msi_set_affinity,
-};
-
-static int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
- unsigned int nr_irqs, void *args)
-{
- struct plda_pcie_rp *port = domain->host_data;
- struct plda_msi *msi = &port->msi;
- unsigned long bit;
-
- mutex_lock(&msi->lock);
- bit = find_first_zero_bit(msi->used, msi->num_vectors);
- if (bit >= msi->num_vectors) {
- mutex_unlock(&msi->lock);
- return -ENOSPC;
- }
-
- set_bit(bit, msi->used);
-
- irq_domain_set_info(domain, virq, bit, &plda_msi_bottom_irq_chip,
- domain->host_data, handle_edge_irq, NULL, NULL);
-
- mutex_unlock(&msi->lock);
-
- return 0;
-}
-
-static void plda_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
- unsigned int nr_irqs)
-{
- struct irq_data *d = irq_domain_get_irq_data(domain, virq);
- struct plda_pcie_rp *port = irq_data_get_irq_chip_data(d);
- struct plda_msi *msi = &port->msi;
-
- mutex_lock(&msi->lock);
-
- if (test_bit(d->hwirq, msi->used))
- __clear_bit(d->hwirq, msi->used);
- else
- dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq);
-
- mutex_unlock(&msi->lock);
-}
-
-static const struct irq_domain_ops msi_domain_ops = {
- .alloc = plda_irq_msi_domain_alloc,
- .free = plda_irq_msi_domain_free,
-};
-
-static struct irq_chip plda_msi_irq_chip = {
- .name = "PLDA PCIe MSI",
- .irq_ack = irq_chip_ack_parent,
- .irq_mask = pci_msi_mask_irq,
- .irq_unmask = pci_msi_unmask_irq,
-};
-
-static struct msi_domain_info plda_msi_domain_info = {
- .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
- MSI_FLAG_PCI_MSIX),
- .chip = &plda_msi_irq_chip,
-};
-
-static int plda_allocate_msi_domains(struct plda_pcie_rp *port)
-{
- struct device *dev = port->dev;
- struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
- struct plda_msi *msi = &port->msi;
-
- mutex_init(&port->msi.lock);
-
- msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors,
- &msi_domain_ops, port);
- if (!msi->dev_domain) {
- dev_err(dev, "failed to create IRQ domain\n");
- return -ENOMEM;
- }
-
- msi->msi_domain = pci_msi_create_irq_domain(fwnode, &plda_msi_domain_info,
- msi->dev_domain);
- if (!msi->msi_domain) {
- dev_err(dev, "failed to create MSI domain\n");
- irq_domain_remove(msi->dev_domain);
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static void plda_handle_intx(struct irq_desc *desc)
-{
- struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
- struct irq_chip *chip = irq_desc_get_chip(desc);
- struct device *dev = port->dev;
- void __iomem *bridge_base_addr = port->bridge_addr;
- unsigned long status;
- u32 bit;
- int ret;
-
- chained_irq_enter(chip, desc);
-
- status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
- if (status & PM_MSI_INT_INTX_MASK) {
- status &= PM_MSI_INT_INTX_MASK;
- status >>= PM_MSI_INT_INTX_SHIFT;
- for_each_set_bit(bit, &status, PCI_NUM_INTX) {
- ret = generic_handle_domain_irq(port->intx_domain, bit);
- if (ret)
- dev_err_ratelimited(dev, "bad INTx IRQ %d\n",
- bit);
- }
- }
-
- chained_irq_exit(chip, desc);
-}
-
-static void plda_ack_intx_irq(struct irq_data *data)
-{
- struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
- void __iomem *bridge_base_addr = port->bridge_addr;
- u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
-
- writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
-}
-
-static void plda_mask_intx_irq(struct irq_data *data)
-{
- struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
- void __iomem *bridge_base_addr = port->bridge_addr;
- unsigned long flags;
- u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
- u32 val;
-
- raw_spin_lock_irqsave(&port->lock, flags);
- val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
- val &= ~mask;
- writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
- raw_spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static void plda_unmask_intx_irq(struct irq_data *data)
-{
- struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
- void __iomem *bridge_base_addr = port->bridge_addr;
- unsigned long flags;
- u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
- u32 val;
-
- raw_spin_lock_irqsave(&port->lock, flags);
- val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
- val |= mask;
- writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
- raw_spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static struct irq_chip plda_intx_irq_chip = {
- .name = "PLDA PCIe INTx",
- .irq_ack = plda_ack_intx_irq,
- .irq_mask = plda_mask_intx_irq,
- .irq_unmask = plda_unmask_intx_irq,
-};
-
-static int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- irq_set_chip_and_handler(irq, &plda_intx_irq_chip, handle_level_irq);
- irq_set_chip_data(irq, domain->host_data);
-
- return 0;
-}
-
-static const struct irq_domain_ops intx_domain_ops = {
- .map = plda_pcie_intx_map,
-};
-
static inline u32 reg_to_event(u32 reg, struct event_map field)
{
return (reg & field.reg_mask) ? BIT(field.event_bit) : 0;
@@ -638,23 +404,6 @@ static irqreturn_t mc_event_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static void plda_handle_event(struct irq_desc *desc)
-{
- struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
- unsigned long events;
- u32 bit;
- struct irq_chip *chip = irq_desc_get_chip(desc);
-
- chained_irq_enter(chip, desc);
-
- events = port->event_ops->get_events(port);
-
- for_each_set_bit(bit, &events, port->num_events)
- generic_handle_domain_irq(port->event_domain, bit);
-
- chained_irq_exit(chip, desc);
-}
-
static void mc_ack_event_irq(struct irq_data *data)
{
struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
@@ -818,47 +567,6 @@ static const struct plda_event mc_event = {
.msi_event = EVENT_LOCAL_PM_MSI_INT_MSI,
};
-static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port,
- const struct irq_domain_ops *ops)
-{
- struct device *dev = port->dev;
- struct device_node *node = dev->of_node;
- struct device_node *pcie_intc_node;
-
- /* Setup INTx */
- pcie_intc_node = of_get_next_child(node, NULL);
- if (!pcie_intc_node) {
- dev_err(dev, "failed to find PCIe Intc node\n");
- return -EINVAL;
- }
-
- port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events,
- ops, port);
-
- if (!port->event_domain) {
- dev_err(dev, "failed to get event domain\n");
- of_node_put(pcie_intc_node);
- return -ENOMEM;
- }
-
- irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS);
-
- port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
- &intx_domain_ops, port);
- if (!port->intx_domain) {
- dev_err(dev, "failed to get an INTx IRQ domain\n");
- of_node_put(pcie_intc_node);
- return -ENOMEM;
- }
-
- irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED);
-
- of_node_put(pcie_intc_node);
- raw_spin_lock_init(&port->lock);
-
- return plda_allocate_msi_domains(port);
-}
-
static inline void mc_clear_secs(struct mc_pcie *port)
{
void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR;
@@ -919,75 +627,6 @@ static void mc_disable_interrupts(struct mc_pcie *port)
writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
}
-static int plda_init_interrupts(struct platform_device *pdev,
- struct plda_pcie_rp *port,
- const struct plda_event *event)
-{
- struct device *dev = &pdev->dev;
- int irq;
- int i, intx_irq, msi_irq, event_irq;
- int ret;
-
- if (!event->event_ops || !event->event_ops->get_events) {
- dev_err(dev, "no get events ops\n");
- return -EINVAL;
- }
-
- ret = plda_pcie_init_irq_domains(port, event->domain_ops);
- if (ret) {
- dev_err(dev, "failed creating IRQ domains\n");
- return ret;
- }
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return -ENODEV;
-
- port->event_ops = event->event_ops;
-
- for (i = 0; i < port->num_events; i++) {
- event_irq = irq_create_mapping(port->event_domain, i);
- if (!event_irq) {
- dev_err(dev, "failed to map hwirq %d\n", i);
- return -ENXIO;
- }
-
- if (event->request_event_irq)
- ret = event->request_event_irq(port, event_irq, i);
- else
- ret = devm_request_irq(dev, event_irq, plda_event_handler,
- 0, NULL, port);
-
- if (ret) {
- dev_err(dev, "failed to request IRQ %d\n", event_irq);
- return ret;
- }
- }
-
- intx_irq = irq_create_mapping(port->event_domain,
- event->intx_event);
- if (!intx_irq) {
- dev_err(dev, "failed to map INTx interrupt\n");
- return -ENXIO;
- }
-
- /* Plug the INTx chained handler */
- irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port);
-
- msi_irq = irq_create_mapping(port->event_domain,
- event->msi_event);
- if (!msi_irq)
- return -ENXIO;
-
- /* Plug the MSI chained handler */
- irq_set_chained_handler_and_data(msi_irq, plda_handle_msi, port);
-
- /* Plug the main event chained handler */
- irq_set_chained_handler_and_data(irq, plda_handle_event, port);
-
- return 0;
-}
-
static int mc_platform_init(struct pci_config_window *cfg)
{
struct device *dev = cfg->parent;
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
index 21ca6b460f5e..a3fae91927be 100644
--- a/drivers/pci/controller/plda/pcie-plda-host.c
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -18,11 +18,373 @@
#include "pcie-plda.h"
+static void plda_handle_msi(struct irq_desc *desc)
+{
+ struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct device *dev = port->dev;
+ struct plda_msi *msi = &port->msi;
+ void __iomem *bridge_base_addr = port->bridge_addr;
+ unsigned long status;
+ u32 bit;
+ int ret;
+
+ chained_irq_enter(chip, desc);
+
+ status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
+ if (status & PM_MSI_INT_MSI_MASK) {
+ writel_relaxed(status & PM_MSI_INT_MSI_MASK, bridge_base_addr + ISTATUS_LOCAL);
+ status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
+ for_each_set_bit(bit, &status, msi->num_vectors) {
+ ret = generic_handle_domain_irq(msi->dev_domain, bit);
+ if (ret)
+ dev_err_ratelimited(dev, "bad MSI IRQ %d\n",
+ bit);
+ }
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static void plda_msi_bottom_irq_ack(struct irq_data *data)
+{
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ void __iomem *bridge_base_addr = port->bridge_addr;
+ u32 bitpos = data->hwirq;
+
+ writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
+}
+
+static void plda_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ phys_addr_t addr = port->msi.vector_phy;
+
+ msg->address_lo = lower_32_bits(addr);
+ msg->address_hi = upper_32_bits(addr);
+ msg->data = data->hwirq;
+
+ dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n",
+ (int)data->hwirq, msg->address_hi, msg->address_lo);
+}
+
+static int plda_msi_set_affinity(struct irq_data *irq_data,
+ const struct cpumask *mask, bool force)
+{
+ return -EINVAL;
+}
+
+static struct irq_chip plda_msi_bottom_irq_chip = {
+ .name = "PLDA MSI",
+ .irq_ack = plda_msi_bottom_irq_ack,
+ .irq_compose_msi_msg = plda_compose_msi_msg,
+ .irq_set_affinity = plda_msi_set_affinity,
+};
+
+static int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *args)
+{
+ struct plda_pcie_rp *port = domain->host_data;
+ struct plda_msi *msi = &port->msi;
+ unsigned long bit;
+
+ mutex_lock(&msi->lock);
+ bit = find_first_zero_bit(msi->used, msi->num_vectors);
+ if (bit >= msi->num_vectors) {
+ mutex_unlock(&msi->lock);
+ return -ENOSPC;
+ }
+
+ set_bit(bit, msi->used);
+
+ irq_domain_set_info(domain, virq, bit, &plda_msi_bottom_irq_chip,
+ domain->host_data, handle_edge_irq, NULL, NULL);
+
+ mutex_unlock(&msi->lock);
+
+ return 0;
+}
+
+static void plda_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs)
+{
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(d);
+ struct plda_msi *msi = &port->msi;
+
+ mutex_lock(&msi->lock);
+
+ if (test_bit(d->hwirq, msi->used))
+ __clear_bit(d->hwirq, msi->used);
+ else
+ dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq);
+
+ mutex_unlock(&msi->lock);
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+ .alloc = plda_irq_msi_domain_alloc,
+ .free = plda_irq_msi_domain_free,
+};
+
+static struct irq_chip plda_msi_irq_chip = {
+ .name = "PLDA PCIe MSI",
+ .irq_ack = irq_chip_ack_parent,
+ .irq_mask = pci_msi_mask_irq,
+ .irq_unmask = pci_msi_unmask_irq,
+};
+
+static struct msi_domain_info plda_msi_domain_info = {
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+ MSI_FLAG_PCI_MSIX),
+ .chip = &plda_msi_irq_chip,
+};
+
+static int plda_allocate_msi_domains(struct plda_pcie_rp *port)
+{
+ struct device *dev = port->dev;
+ struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
+ struct plda_msi *msi = &port->msi;
+
+ mutex_init(&port->msi.lock);
+
+ msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors,
+ &msi_domain_ops, port);
+ if (!msi->dev_domain) {
+ dev_err(dev, "failed to create IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ msi->msi_domain = pci_msi_create_irq_domain(fwnode, &plda_msi_domain_info,
+ msi->dev_domain);
+ if (!msi->msi_domain) {
+ dev_err(dev, "failed to create MSI domain\n");
+ irq_domain_remove(msi->dev_domain);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void plda_handle_intx(struct irq_desc *desc)
+{
+ struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct device *dev = port->dev;
+ void __iomem *bridge_base_addr = port->bridge_addr;
+ unsigned long status;
+ u32 bit;
+ int ret;
+
+ chained_irq_enter(chip, desc);
+
+ status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
+ if (status & PM_MSI_INT_INTX_MASK) {
+ status &= PM_MSI_INT_INTX_MASK;
+ status >>= PM_MSI_INT_INTX_SHIFT;
+ for_each_set_bit(bit, &status, PCI_NUM_INTX) {
+ ret = generic_handle_domain_irq(port->intx_domain, bit);
+ if (ret)
+ dev_err_ratelimited(dev, "bad INTx IRQ %d\n",
+ bit);
+ }
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static void plda_ack_intx_irq(struct irq_data *data)
+{
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ void __iomem *bridge_base_addr = port->bridge_addr;
+ u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
+
+ writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
+}
+
+static void plda_mask_intx_irq(struct irq_data *data)
+{
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ void __iomem *bridge_base_addr = port->bridge_addr;
+ unsigned long flags;
+ u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
+ u32 val;
+
+ raw_spin_lock_irqsave(&port->lock, flags);
+ val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
+ val &= ~mask;
+ writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
+ raw_spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void plda_unmask_intx_irq(struct irq_data *data)
+{
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ void __iomem *bridge_base_addr = port->bridge_addr;
+ unsigned long flags;
+ u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
+ u32 val;
+
+ raw_spin_lock_irqsave(&port->lock, flags);
+ val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
+ val |= mask;
+ writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
+ raw_spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static struct irq_chip plda_intx_irq_chip = {
+ .name = "PLDA PCIe INTx",
+ .irq_ack = plda_ack_intx_irq,
+ .irq_mask = plda_mask_intx_irq,
+ .irq_unmask = plda_unmask_intx_irq,
+};
+
+static int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(irq, &plda_intx_irq_chip, handle_level_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops intx_domain_ops = {
+ .map = plda_pcie_intx_map,
+};
+
irqreturn_t plda_event_handler(int irq, void *dev_id)
{
return IRQ_HANDLED;
}
+static void plda_handle_event(struct irq_desc *desc)
+{
+ struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
+ unsigned long events;
+ u32 bit;
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+
+ chained_irq_enter(chip, desc);
+
+ events = port->event_ops->get_events(port);
+
+ for_each_set_bit(bit, &events, port->num_events)
+ generic_handle_domain_irq(port->event_domain, bit);
+
+ chained_irq_exit(chip, desc);
+}
+
+static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port,
+ const struct irq_domain_ops *ops)
+{
+ struct device *dev = port->dev;
+ struct device_node *node = dev->of_node;
+ struct device_node *pcie_intc_node;
+
+ /* Setup INTx */
+ pcie_intc_node = of_get_next_child(node, NULL);
+ if (!pcie_intc_node) {
+ dev_err(dev, "failed to find PCIe Intc node\n");
+ return -EINVAL;
+ }
+
+ port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events,
+ ops, port);
+
+ if (!port->event_domain) {
+ dev_err(dev, "failed to get event domain\n");
+ of_node_put(pcie_intc_node);
+ return -ENOMEM;
+ }
+
+ irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS);
+
+ port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
+ &intx_domain_ops, port);
+ if (!port->intx_domain) {
+ dev_err(dev, "failed to get an INTx IRQ domain\n");
+ of_node_put(pcie_intc_node);
+ return -ENOMEM;
+ }
+
+ irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED);
+
+ of_node_put(pcie_intc_node);
+ raw_spin_lock_init(&port->lock);
+
+ return plda_allocate_msi_domains(port);
+}
+
+int plda_init_interrupts(struct platform_device *pdev,
+ struct plda_pcie_rp *port,
+ const struct plda_event *event)
+{
+ struct device *dev = &pdev->dev;
+ int irq;
+ int i, intx_irq, msi_irq, event_irq;
+ int ret;
+
+ if (!event->event_ops || !event->event_ops->get_events) {
+ dev_err(dev, "no get events ops\n");
+ return -EINVAL;
+ }
+
+ ret = plda_pcie_init_irq_domains(port, event->domain_ops);
+ if (ret) {
+ dev_err(dev, "failed creating IRQ domains\n");
+ return ret;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
+
+ port->event_ops = event->event_ops;
+
+ for (i = 0; i < port->num_events; i++) {
+ event_irq = irq_create_mapping(port->event_domain, i);
+ if (!event_irq) {
+ dev_err(dev, "failed to map hwirq %d\n", i);
+ return -ENXIO;
+ }
+
+ if (event->request_event_irq)
+ ret = event->request_event_irq(port, event_irq, i);
+ else
+ ret = devm_request_irq(dev, event_irq, plda_event_handler,
+ 0, NULL, port);
+
+ if (ret) {
+ dev_err(dev, "failed to request IRQ %d\n", event_irq);
+ return ret;
+ }
+ }
+
+ intx_irq = irq_create_mapping(port->event_domain,
+ event->intx_event);
+ if (!intx_irq) {
+ dev_err(dev, "failed to map INTx interrupt\n");
+ return -ENXIO;
+ }
+
+ /* Plug the INTx chained handler */
+ irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port);
+
+ msi_irq = irq_create_mapping(port->event_domain,
+ event->msi_event);
+ if (!msi_irq)
+ return -ENXIO;
+
+ /* Plug the MSI chained handler */
+ irq_set_chained_handler_and_data(msi_irq, plda_handle_msi, port);
+
+ /* Plug the main event chained handler */
+ irq_set_chained_handler_and_data(irq, plda_handle_event, port);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(plda_init_interrupts);
+
void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
phys_addr_t axi_addr, phys_addr_t pci_addr,
size_t size)
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 080932cbe8c4..573ecf0bd9a8 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -138,6 +138,9 @@ struct plda_event {
};
irqreturn_t plda_event_handler(int irq, void *dev_id);
+int plda_init_interrupts(struct platform_device *pdev,
+ struct plda_pcie_rp *port,
+ const struct plda_event *event);
void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
phys_addr_t axi_addr, phys_addr_t pci_addr,
size_t size);
--
2.17.1
Add PLDA PCIe related data structures by rename
data structure name from mc_* to plda_*.
axi_base_addr is stayed in struct mc_pcie for it
is microchip its own data.
The event interrupt codes is still using struct
mc_pcie because the event interrupt codes can not
be re-used.
The modification includes:
mc_pcie --> plda_pcie_rp (Get most of data members)
mc_msi --> plda_msi
Signed-off-by: Minda Chen <[email protected]>
---
.../pci/controller/plda/pcie-microchip-host.c | 96 ++++++++++---------
1 file changed, 53 insertions(+), 43 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 60870ee1f1c9..3dc4d4ca9d0c 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -22,7 +22,7 @@
#include "pcie-plda.h"
/* Number of MSI IRQs */
-#define MC_MAX_NUM_MSI_IRQS 32
+#define PLDA_MAX_NUM_MSI_IRQS 32
/* PCIe Bridge Phy and Controller Phy offsets */
#define MC_PCIE1_BRIDGE_ADDR 0x00008000u
@@ -179,25 +179,29 @@ struct event_map {
u32 event_bit;
};
-struct mc_msi {
+struct plda_msi {
struct mutex lock; /* Protect used bitmap */
struct irq_domain *msi_domain;
struct irq_domain *dev_domain;
u32 num_vectors;
u64 vector_phy;
- DECLARE_BITMAP(used, MC_MAX_NUM_MSI_IRQS);
+ DECLARE_BITMAP(used, PLDA_MAX_NUM_MSI_IRQS);
};
-struct mc_pcie {
- void __iomem *axi_base_addr;
+struct plda_pcie_rp {
struct device *dev;
struct irq_domain *intx_domain;
struct irq_domain *event_domain;
raw_spinlock_t lock;
- struct mc_msi msi;
+ struct plda_msi msi;
void __iomem *bridge_addr;
};
+struct mc_pcie {
+ struct plda_pcie_rp plda;
+ void __iomem *axi_base_addr;
+};
+
struct cause {
const char *sym;
const char *str;
@@ -313,7 +317,7 @@ static struct mc_pcie *port;
static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam)
{
- struct mc_msi *msi = &port->msi;
+ struct plda_msi *msi = &port->plda.msi;
u16 reg;
u8 queue_size;
@@ -336,10 +340,10 @@ static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam)
static void mc_handle_msi(struct irq_desc *desc)
{
- struct mc_pcie *port = irq_desc_get_handler_data(desc);
+ struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
struct device *dev = port->dev;
- struct mc_msi *msi = &port->msi;
+ struct plda_msi *msi = &port->msi;
void __iomem *bridge_base_addr = port->bridge_addr;
unsigned long status;
u32 bit;
@@ -364,7 +368,7 @@ static void mc_handle_msi(struct irq_desc *desc)
static void mc_msi_bottom_irq_ack(struct irq_data *data)
{
- struct mc_pcie *port = irq_data_get_irq_chip_data(data);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
void __iomem *bridge_base_addr = port->bridge_addr;
u32 bitpos = data->hwirq;
@@ -373,7 +377,7 @@ static void mc_msi_bottom_irq_ack(struct irq_data *data)
static void mc_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
{
- struct mc_pcie *port = irq_data_get_irq_chip_data(data);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
phys_addr_t addr = port->msi.vector_phy;
msg->address_lo = lower_32_bits(addr);
@@ -400,8 +404,8 @@ static struct irq_chip mc_msi_bottom_irq_chip = {
static int mc_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *args)
{
- struct mc_pcie *port = domain->host_data;
- struct mc_msi *msi = &port->msi;
+ struct plda_pcie_rp *port = domain->host_data;
+ struct plda_msi *msi = &port->msi;
unsigned long bit;
mutex_lock(&msi->lock);
@@ -425,8 +429,8 @@ static void mc_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs)
{
struct irq_data *d = irq_domain_get_irq_data(domain, virq);
- struct mc_pcie *port = irq_data_get_irq_chip_data(d);
- struct mc_msi *msi = &port->msi;
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(d);
+ struct plda_msi *msi = &port->msi;
mutex_lock(&msi->lock);
@@ -456,11 +460,11 @@ static struct msi_domain_info mc_msi_domain_info = {
.chip = &mc_msi_irq_chip,
};
-static int mc_allocate_msi_domains(struct mc_pcie *port)
+static int mc_allocate_msi_domains(struct plda_pcie_rp *port)
{
struct device *dev = port->dev;
struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
- struct mc_msi *msi = &port->msi;
+ struct plda_msi *msi = &port->msi;
mutex_init(&port->msi.lock);
@@ -484,7 +488,7 @@ static int mc_allocate_msi_domains(struct mc_pcie *port)
static void mc_handle_intx(struct irq_desc *desc)
{
- struct mc_pcie *port = irq_desc_get_handler_data(desc);
+ struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
struct device *dev = port->dev;
void __iomem *bridge_base_addr = port->bridge_addr;
@@ -511,7 +515,7 @@ static void mc_handle_intx(struct irq_desc *desc)
static void mc_ack_intx_irq(struct irq_data *data)
{
- struct mc_pcie *port = irq_data_get_irq_chip_data(data);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
void __iomem *bridge_base_addr = port->bridge_addr;
u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
@@ -520,7 +524,7 @@ static void mc_ack_intx_irq(struct irq_data *data)
static void mc_mask_intx_irq(struct irq_data *data)
{
- struct mc_pcie *port = irq_data_get_irq_chip_data(data);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
void __iomem *bridge_base_addr = port->bridge_addr;
unsigned long flags;
u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
@@ -535,7 +539,7 @@ static void mc_mask_intx_irq(struct irq_data *data)
static void mc_unmask_intx_irq(struct irq_data *data)
{
- struct mc_pcie *port = irq_data_get_irq_chip_data(data);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
void __iomem *bridge_base_addr = port->bridge_addr;
unsigned long flags;
u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
@@ -625,21 +629,22 @@ static u32 local_events(struct mc_pcie *port)
return val;
}
-static u32 get_events(struct mc_pcie *port)
+static u32 get_events(struct plda_pcie_rp *port)
{
+ struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda);
u32 events = 0;
- events |= pcie_events(port);
- events |= sec_errors(port);
- events |= ded_errors(port);
- events |= local_events(port);
+ events |= pcie_events(mc_port);
+ events |= sec_errors(mc_port);
+ events |= ded_errors(mc_port);
+ events |= local_events(mc_port);
return events;
}
static irqreturn_t mc_event_handler(int irq, void *dev_id)
{
- struct mc_pcie *port = dev_id;
+ struct plda_pcie_rp *port = dev_id;
struct device *dev = port->dev;
struct irq_data *data;
@@ -655,7 +660,7 @@ static irqreturn_t mc_event_handler(int irq, void *dev_id)
static void mc_handle_event(struct irq_desc *desc)
{
- struct mc_pcie *port = irq_desc_get_handler_data(desc);
+ struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
unsigned long events;
u32 bit;
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -672,12 +677,13 @@ static void mc_handle_event(struct irq_desc *desc)
static void mc_ack_event_irq(struct irq_data *data)
{
- struct mc_pcie *port = irq_data_get_irq_chip_data(data);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda);
u32 event = data->hwirq;
void __iomem *addr;
u32 mask;
- addr = port->axi_base_addr + event_descs[event].base +
+ addr = mc_port->axi_base_addr + event_descs[event].base +
event_descs[event].offset;
mask = event_descs[event].mask;
mask |= event_descs[event].enb_mask;
@@ -687,13 +693,14 @@ static void mc_ack_event_irq(struct irq_data *data)
static void mc_mask_event_irq(struct irq_data *data)
{
- struct mc_pcie *port = irq_data_get_irq_chip_data(data);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda);
u32 event = data->hwirq;
void __iomem *addr;
u32 mask;
u32 val;
- addr = port->axi_base_addr + event_descs[event].base +
+ addr = mc_port->axi_base_addr + event_descs[event].base +
event_descs[event].mask_offset;
mask = event_descs[event].mask;
if (event_descs[event].enb_mask) {
@@ -717,13 +724,14 @@ static void mc_mask_event_irq(struct irq_data *data)
static void mc_unmask_event_irq(struct irq_data *data)
{
- struct mc_pcie *port = irq_data_get_irq_chip_data(data);
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda);
u32 event = data->hwirq;
void __iomem *addr;
u32 mask;
u32 val;
- addr = port->axi_base_addr + event_descs[event].base +
+ addr = mc_port->axi_base_addr + event_descs[event].base +
event_descs[event].mask_offset;
mask = event_descs[event].mask;
@@ -811,7 +819,7 @@ static int mc_pcie_init_clks(struct device *dev)
return 0;
}
-static int mc_pcie_init_irq_domains(struct mc_pcie *port)
+static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
{
struct device *dev = port->dev;
struct device_node *node = dev->of_node;
@@ -889,7 +897,7 @@ static void mc_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
}
static int mc_pcie_setup_windows(struct platform_device *pdev,
- struct mc_pcie *port)
+ struct plda_pcie_rp *port)
{
void __iomem *bridge_base_addr = port->bridge_addr;
struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
@@ -970,7 +978,7 @@ static void mc_disable_interrupts(struct mc_pcie *port)
writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
}
-static int mc_init_interrupts(struct platform_device *pdev, struct mc_pcie *port)
+static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port)
{
struct device *dev = &pdev->dev;
int irq;
@@ -1043,12 +1051,12 @@ static int mc_platform_init(struct pci_config_window *cfg)
mc_pcie_enable_msi(port, cfg->win);
/* Configure non-config space outbound ranges */
- ret = mc_pcie_setup_windows(pdev, port);
+ ret = mc_pcie_setup_windows(pdev, &port->plda);
if (ret)
return ret;
/* Address translation is up; safe to enable interrupts */
- ret = mc_init_interrupts(pdev, port);
+ ret = mc_init_interrupts(pdev, &port->plda);
if (ret)
return ret;
@@ -1059,6 +1067,7 @@ static int mc_host_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
void __iomem *bridge_base_addr;
+ struct plda_pcie_rp *plda;
int ret;
u32 val;
@@ -1066,7 +1075,8 @@ static int mc_host_probe(struct platform_device *pdev)
if (!port)
return -ENOMEM;
- port->dev = dev;
+ plda = &port->plda;
+ plda->dev = dev;
port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(port->axi_base_addr))
@@ -1075,7 +1085,7 @@ static int mc_host_probe(struct platform_device *pdev)
mc_disable_interrupts(port);
bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
- port->bridge_addr = bridge_base_addr;
+ plda->bridge_addr = bridge_base_addr;
/* Allow enabling MSI by disabling MSI-X */
val = readl(bridge_base_addr + PCIE_PCI_IRQ_DW0);
@@ -1087,10 +1097,10 @@ static int mc_host_probe(struct platform_device *pdev)
val &= NUM_MSI_MSGS_MASK;
val >>= NUM_MSI_MSGS_SHIFT;
- port->msi.num_vectors = 1 << val;
+ plda->msi.num_vectors = 1 << val;
/* Pick vector address from design */
- port->msi.vector_phy = readl_relaxed(bridge_base_addr + IMSI_ADDR);
+ plda->msi.vector_phy = readl_relaxed(bridge_base_addr + IMSI_ADDR);
ret = mc_pcie_init_clks(dev);
if (ret) {
--
2.17.1
Set plda_event_handler() to static for it is just
referenced in its file now.
Signed-off-by: Minda Chen <[email protected]>
---
drivers/pci/controller/plda/pcie-plda-host.c | 2 +-
drivers/pci/controller/plda/pcie-plda.h | 1 -
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
index a3fae91927be..4a4a2b5ef8fb 100644
--- a/drivers/pci/controller/plda/pcie-plda-host.c
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -252,7 +252,7 @@ static const struct irq_domain_ops intx_domain_ops = {
.map = plda_pcie_intx_map,
};
-irqreturn_t plda_event_handler(int irq, void *dev_id)
+static irqreturn_t plda_event_handler(int irq, void *dev_id)
{
return IRQ_HANDLED;
}
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 573ecf0bd9a8..ce7787aef4b7 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -137,7 +137,6 @@ struct plda_event {
int msi_event;
};
-irqreturn_t plda_event_handler(int irq, void *dev_id);
int plda_init_interrupts(struct platform_device *pdev,
struct plda_pcie_rp *port,
const struct plda_event *event);
--
2.17.1
Add StarFive JH7110 SoC PCIe controller dt-bindings.
JH7110 using PLDA XpressRICH PCIe host controller IP.
Signed-off-by: Minda Chen <[email protected]>
Reviewed-by: Hal Feng <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
---
.../bindings/pci/starfive,jh7110-pcie.yaml | 120 ++++++++++++++++++
1 file changed, 120 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/starfive,jh7110-pcie.yaml
diff --git a/Documentation/devicetree/bindings/pci/starfive,jh7110-pcie.yaml b/Documentation/devicetree/bindings/pci/starfive,jh7110-pcie.yaml
new file mode 100644
index 000000000000..67151aaa3948
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/starfive,jh7110-pcie.yaml
@@ -0,0 +1,120 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/starfive,jh7110-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JH7110 PCIe host controller
+
+maintainers:
+ - Kevin Xie <[email protected]>
+
+allOf:
+ - $ref: plda,xpressrich3-axi-common.yaml#
+
+properties:
+ compatible:
+ const: starfive,jh7110-pcie
+
+ clocks:
+ items:
+ - description: NOC bus clock
+ - description: Transport layer clock
+ - description: AXI MST0 clock
+ - description: APB clock
+
+ clock-names:
+ items:
+ - const: noc
+ - const: tl
+ - const: axi_mst0
+ - const: apb
+
+ resets:
+ items:
+ - description: AXI MST0 reset
+ - description: AXI SLAVE0 reset
+ - description: AXI SLAVE reset
+ - description: PCIE BRIDGE reset
+ - description: PCIE CORE reset
+ - description: PCIE APB reset
+
+ reset-names:
+ items:
+ - const: mst0
+ - const: slv0
+ - const: slv
+ - const: brg
+ - const: core
+ - const: apb
+
+ starfive,stg-syscon:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ description:
+ The phandle to System Register Controller syscon node.
+
+ perst-gpios:
+ description: GPIO controlled connection to PERST# signal
+ maxItems: 1
+
+ phys:
+ description:
+ Specified PHY is attached to PCIe controller.
+ maxItems: 1
+
+required:
+ - clocks
+ - resets
+ - starfive,stg-syscon
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ pcie@940000000 {
+ compatible = "starfive,jh7110-pcie";
+ reg = <0x9 0x40000000 0x0 0x10000000>,
+ <0x0 0x2b000000 0x0 0x1000000>;
+ reg-names = "cfg", "apb";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ device_type = "pci";
+ ranges = <0x82000000 0x0 0x30000000 0x0 0x30000000 0x0 0x08000000>,
+ <0xc3000000 0x9 0x00000000 0x9 0x00000000 0x0 0x40000000>;
+ starfive,stg-syscon = <&stg_syscon>;
+ bus-range = <0x0 0xff>;
+ interrupt-parent = <&plic>;
+ interrupts = <56>;
+ interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+ interrupt-map = <0x0 0x0 0x0 0x1 &pcie_intc0 0x1>,
+ <0x0 0x0 0x0 0x2 &pcie_intc0 0x2>,
+ <0x0 0x0 0x0 0x3 &pcie_intc0 0x3>,
+ <0x0 0x0 0x0 0x4 &pcie_intc0 0x4>;
+ msi-controller;
+ clocks = <&syscrg 86>,
+ <&stgcrg 10>,
+ <&stgcrg 8>,
+ <&stgcrg 9>;
+ clock-names = "noc", "tl", "axi_mst0", "apb";
+ resets = <&stgcrg 11>,
+ <&stgcrg 12>,
+ <&stgcrg 13>,
+ <&stgcrg 14>,
+ <&stgcrg 15>,
+ <&stgcrg 16>;
+ perst-gpios = <&gpios 26 GPIO_ACTIVE_LOW>;
+ phys = <&pciephy0>;
+
+ pcie_intc0: interrupt-controller {
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+ };
--
2.17.1
Add StarFive JH7110 SoC PCIe controller platform
driver codes, and add host init/deinit to pcie-plda-host.c
Signed-off-by: Minda Chen <[email protected]>
Co-developed-by: Kevin Xie <[email protected]>
Reviewed-by: Mason Huo <[email protected]>
---
MAINTAINERS | 7 +
drivers/pci/controller/plda/Kconfig | 12 +
drivers/pci/controller/plda/Makefile | 1 +
drivers/pci/controller/plda/pcie-plda-host.c | 135 +++++-
drivers/pci/controller/plda/pcie-plda.h | 94 +++-
drivers/pci/controller/plda/pcie-starfive.c | 448 +++++++++++++++++++
6 files changed, 682 insertions(+), 15 deletions(-)
create mode 100644 drivers/pci/controller/plda/pcie-starfive.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 5426966c89c7..333774a65aa0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16677,6 +16677,13 @@ S: Maintained
F: Documentation/devicetree/bindings/pci/socionext,uniphier-pcie*
F: drivers/pci/controller/dwc/pcie-uniphier*
+PCIE DRIVER FOR STARFIVE JH71x0
+M: Kevin Xie <[email protected]>
+L: [email protected]
+S: Maintained
+F: Documentation/devicetree/bindings/pci/starfive*
+F: drivers/pci/controller/plda/pcie-starfive.c
+
PCIE DRIVER FOR ST SPEAR13XX
M: Pratyush Anand <[email protected]>
L: [email protected]
diff --git a/drivers/pci/controller/plda/Kconfig b/drivers/pci/controller/plda/Kconfig
index e54a82ee94f5..8de661730aa5 100644
--- a/drivers/pci/controller/plda/Kconfig
+++ b/drivers/pci/controller/plda/Kconfig
@@ -15,4 +15,16 @@ config PCIE_MICROCHIP_HOST
Say Y here if you want kernel to support the Microchip AXI PCIe
Host Bridge driver.
+config PCIE_STARFIVE_HOST
+ tristate "StarFive PCIe host controller"
+ depends on OF && PCI_MSI
+ select PCIE_PLDA_HOST
+ help
+ Say Y here if you want to support the StarFive PCIe controller
+ in host mode. StarFive PCIe controller uses PLDA PCIe
+ core.
+ If you choose to build this driver as module it will
+ be dynamically linked and module will be called
+ pcie-starfive.ko
+
endmenu
diff --git a/drivers/pci/controller/plda/Makefile b/drivers/pci/controller/plda/Makefile
index 4340ab007f44..0ac6851bed48 100644
--- a/drivers/pci/controller/plda/Makefile
+++ b/drivers/pci/controller/plda/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PCIE_PLDA_HOST) += pcie-plda-host.o
obj-$(CONFIG_PCIE_MICROCHIP_HOST) += pcie-microchip-host.o
+obj-$(CONFIG_PCIE_STARFIVE_HOST) += pcie-starfive.o
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
index 4f2e4827bbf9..187f082dba19 100644
--- a/drivers/pci/controller/plda/pcie-plda-host.c
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -18,6 +18,15 @@
#include "pcie-plda.h"
+void __iomem *plda_pcie_map_bus(struct pci_bus *bus, unsigned int devfn,
+ int where)
+{
+ struct plda_pcie_rp *pcie = bus->sysdata;
+
+ return pcie->config_base + PCIE_ECAM_OFFSET(bus->number, devfn, where);
+}
+EXPORT_SYMBOL_GPL(plda_pcie_map_bus);
+
static void plda_handle_msi(struct irq_desc *desc)
{
struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
@@ -351,7 +360,7 @@ static const struct plda_event_ops plda_event_ops = {
.get_events = plda_get_events,
};
-struct plda_event plda_default_event = {
+static const struct plda_event plda_default_event = {
.event_ops = &plda_event_ops,
.intx_event = EVENT_PM_MSI_INT_INTX,
.msi_event = EVENT_PM_MSI_INT_MSI
@@ -420,8 +429,7 @@ int plda_init_interrupts(struct platform_device *pdev,
const struct plda_event *event)
{
struct device *dev = &pdev->dev;
- int irq;
- int i, intx_irq, msi_irq, event_irq;
+ int i, event_irq;
int ret;
const struct irq_domain_ops *irq_dom_ops;
@@ -438,8 +446,8 @@ int plda_init_interrupts(struct platform_device *pdev,
return ret;
}
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
+ port->irq = platform_get_irq(pdev, 0);
+ if (port->irq < 0)
return -ENODEV;
port->event_ops = event->event_ops;
@@ -463,26 +471,26 @@ int plda_init_interrupts(struct platform_device *pdev,
}
}
- intx_irq = irq_create_mapping(port->event_domain,
- event->intx_event);
- if (!intx_irq) {
+ port->intx_irq = irq_create_mapping(port->event_domain,
+ event->intx_event);
+ if (!port->intx_irq) {
dev_err(dev, "failed to map INTx interrupt\n");
return -ENXIO;
}
/* Plug the INTx chained handler */
- irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port);
+ irq_set_chained_handler_and_data(port->intx_irq, plda_handle_intx, port);
- msi_irq = irq_create_mapping(port->event_domain,
- event->msi_event);
- if (!msi_irq)
+ port->msi_irq = irq_create_mapping(port->event_domain,
+ event->msi_event);
+ if (!port->msi_irq)
return -ENXIO;
/* Plug the MSI chained handler */
- irq_set_chained_handler_and_data(msi_irq, plda_handle_msi, port);
+ irq_set_chained_handler_and_data(port->msi_irq, plda_handle_msi, port);
/* Plug the main event chained handler */
- irq_set_chained_handler_and_data(irq, plda_handle_event, port);
+ irq_set_chained_handler_and_data(port->irq, plda_handle_event, port);
return 0;
}
@@ -548,3 +556,102 @@ int plda_pcie_setup_iomems(struct pci_host_bridge *bridge,
return 0;
}
EXPORT_SYMBOL_GPL(plda_pcie_setup_iomems);
+
+static void plda_pcie_irq_domain_deinit(struct plda_pcie_rp *pcie)
+{
+ irq_set_chained_handler_and_data(pcie->irq, NULL, NULL);
+ irq_set_chained_handler_and_data(pcie->msi_irq, NULL, NULL);
+ irq_set_chained_handler_and_data(pcie->intx_irq, NULL, NULL);
+
+ irq_domain_remove(pcie->msi.msi_domain);
+ irq_domain_remove(pcie->msi.dev_domain);
+
+ irq_domain_remove(pcie->intx_domain);
+ irq_domain_remove(pcie->event_domain);
+}
+
+int plda_pcie_host_init(struct plda_pcie_rp *port, struct pci_ops *ops)
+{
+ struct device *dev = port->dev;
+ struct pci_host_bridge *bridge;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct resource *cfg_res;
+ int ret;
+
+ pdev = to_platform_device(dev);
+
+ port->bridge_addr =
+ devm_platform_ioremap_resource_byname(pdev, "apb");
+
+ if (IS_ERR(port->bridge_addr))
+ return dev_err_probe(dev, PTR_ERR(port->bridge_addr),
+ "failed to map reg memory\n");
+
+ cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
+ if (!cfg_res)
+ return dev_err_probe(dev, -ENODEV,
+ "failed to get config memory\n");
+
+ port->config_base = devm_ioremap_resource(dev, cfg_res);
+ if (IS_ERR(port->config_base))
+ return dev_err_probe(dev, PTR_ERR(port->config_base),
+ "failed to map config memory\n");
+
+ port->phy = devm_phy_optional_get(dev, NULL);
+ if (IS_ERR(port->phy))
+ return dev_err_probe(dev, PTR_ERR(port->phy),
+ "failed to get pcie phy\n");
+
+ bridge = devm_pci_alloc_host_bridge(dev, 0);
+ if (!bridge)
+ return dev_err_probe(dev, -ENOMEM,
+ "failed to alloc bridge\n");
+
+ if (port->host_ops && port->host_ops->host_init) {
+ ret = port->host_ops->host_init(port);
+ if (ret)
+ return ret;
+ }
+
+ port->bridge = bridge;
+ plda_pcie_setup_window(port->bridge_addr, 0, cfg_res->start, 0,
+ resource_size(cfg_res));
+ plda_pcie_setup_iomems(bridge, port);
+ plda_set_default_msi(&port->msi);
+ ret = plda_init_interrupts(pdev, port, &plda_default_event);
+ if (ret)
+ goto err_host;
+
+ /* Set default bus ops */
+ bridge->ops = ops;
+ bridge->sysdata = port;
+
+ ret = pci_host_probe(bridge);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "failed to probe pci host\n");
+ goto err_probe;
+ }
+
+ return ret;
+
+err_probe:
+ plda_pcie_irq_domain_deinit(port);
+err_host:
+ if (port->host_ops && port->host_ops->host_deinit)
+ port->host_ops->host_deinit(port);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(plda_pcie_host_init);
+
+void plda_pcie_host_deinit(struct plda_pcie_rp *port)
+{
+ pci_stop_root_bus(port->bridge->bus);
+ pci_remove_root_bus(port->bridge->bus);
+
+ plda_pcie_irq_domain_deinit(port);
+
+ if (port->host_ops && port->host_ops->host_deinit)
+ port->host_ops->host_deinit(port);
+}
+EXPORT_SYMBOL_GPL(plda_pcie_host_deinit);
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index e0f8fd5ed46a..0cd057a89f00 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -6,14 +6,26 @@
#ifndef _PCIE_PLDA_H
#define _PCIE_PLDA_H
+#include <linux/phy/phy.h>
+
/* Number of MSI IRQs */
#define PLDA_MAX_NUM_MSI_IRQS 32
/* PCIe Bridge Phy Regs */
+#define GEN_SETTINGS 0x80
+#define RP_ENABLE 1
+#define PCIE_PCI_IDS_DW1 0x9c
+#define IDS_CLASS_CODE_SHIFT 16
+#define REVISION_ID_MASK GENMASK(7, 0)
+#define CLASS_CODE_ID_MASK GENMASK(31, 8)
#define PCIE_PCI_IRQ_DW0 0xa8
#define MSIX_CAP_MASK BIT(31)
#define NUM_MSI_MSGS_MASK GENMASK(6, 4)
#define NUM_MSI_MSGS_SHIFT 4
+#define PCI_MISC 0xb4
+#define PHY_FUNCTION_DIS BIT(15)
+#define PCIE_WINROM 0xfc
+#define PREF_MEM_WIN_64_SUPPORT BIT(3)
#define IMASK_LOCAL 0x180
#define DMA_END_ENGINE_0_MASK 0x00000000u
@@ -66,6 +78,8 @@
#define ISTATUS_HOST 0x18c
#define IMSI_ADDR 0x190
#define ISTATUS_MSI 0x194
+#define PMSG_SUPPORT_RX 0x3f0
+#define PMSG_LTR_SUPPORT BIT(2)
/* PCIe Master table init defines */
#define ATR0_PCIE_WIN0_SRCADDR_PARAM 0x600u
@@ -87,6 +101,8 @@
#define PCIE_TX_RX_INTERFACE 0x00000000u
#define PCIE_CONFIG_INTERFACE 0x00000001u
+#define CONFIG_SPACE_ADDR 0x1000u
+
#define ATR_ENTRY_SIZE 32
#define EVENT_A_ATR_EVT_POST_ERR 0
@@ -136,6 +152,11 @@ struct plda_event_ops {
u32 (*get_events)(struct plda_pcie_rp *pcie);
};
+struct plda_pcie_host_ops {
+ int (*host_init)(struct plda_pcie_rp *pcie);
+ void (*host_deinit)(struct plda_pcie_rp *pcie);
+};
+
struct plda_msi {
struct mutex lock; /* Protect used bitmap */
struct irq_domain *msi_domain;
@@ -147,12 +168,19 @@ struct plda_msi {
struct plda_pcie_rp {
struct device *dev;
+ struct pci_host_bridge *bridge;
struct irq_domain *intx_domain;
struct irq_domain *event_domain;
raw_spinlock_t lock;
struct plda_msi msi;
const struct plda_event_ops *event_ops;
+ const struct plda_pcie_host_ops *host_ops;
+ struct phy *phy;
void __iomem *bridge_addr;
+ void __iomem *config_base;
+ int irq;
+ int msi_irq;
+ int intx_irq;
int num_events;
};
@@ -165,6 +193,7 @@ struct plda_event {
int msi_event;
};
+void __iomem *plda_pcie_map_bus(struct pci_bus *bus, unsigned int devfn, int where);
int plda_init_interrupts(struct platform_device *pdev,
struct plda_pcie_rp *port,
const struct plda_event *event);
@@ -173,4 +202,67 @@ void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
size_t size);
int plda_pcie_setup_iomems(struct pci_host_bridge *bridge,
struct plda_pcie_rp *port);
-#endif
+int plda_pcie_host_init(struct plda_pcie_rp *pcie, struct pci_ops *ops);
+void plda_pcie_host_deinit(struct plda_pcie_rp *pcie);
+
+static inline void plda_set_default_msi(struct plda_msi *msi)
+{
+ msi->vector_phy = IMSI_ADDR;
+ msi->num_vectors = PLDA_MAX_NUM_MSI_IRQS;
+}
+
+static inline void plda_pcie_enable_root_port(struct plda_pcie_rp *plda)
+{
+ u32 value;
+
+ value = readl_relaxed(plda->bridge_addr + GEN_SETTINGS);
+ value |= RP_ENABLE;
+ writel_relaxed(value, plda->bridge_addr + GEN_SETTINGS);
+}
+
+static inline void plda_pcie_set_standard_class(struct plda_pcie_rp *plda)
+{
+ u32 value;
+
+ /* set class code and reserve revision id */
+ value = readl_relaxed(plda->bridge_addr + PCIE_PCI_IDS_DW1);
+ value &= REVISION_ID_MASK;
+ value |= (PCI_CLASS_BRIDGE_PCI << IDS_CLASS_CODE_SHIFT);
+ writel_relaxed(value, plda->bridge_addr + PCIE_PCI_IDS_DW1);
+}
+
+static inline void plda_pcie_set_pref_win_64bit(struct plda_pcie_rp *plda)
+{
+ u32 value;
+
+ value = readl_relaxed(plda->bridge_addr + PCIE_WINROM);
+ value |= PREF_MEM_WIN_64_SUPPORT;
+ writel_relaxed(value, plda->bridge_addr + PCIE_WINROM);
+}
+
+static inline void plda_pcie_disable_ltr(struct plda_pcie_rp *plda)
+{
+ u32 value;
+
+ value = readl_relaxed(plda->bridge_addr + PMSG_SUPPORT_RX);
+ value &= ~PMSG_LTR_SUPPORT;
+ writel_relaxed(value, plda->bridge_addr + PMSG_SUPPORT_RX);
+}
+
+static inline void plda_pcie_disable_func(struct plda_pcie_rp *plda)
+{
+ u32 value;
+
+ value = readl_relaxed(plda->bridge_addr + PCI_MISC);
+ value |= PHY_FUNCTION_DIS;
+ writel_relaxed(value, plda->bridge_addr + PCI_MISC);
+}
+
+static inline void plda_pcie_write_rc_bar(struct plda_pcie_rp *plda, u64 val)
+{
+ void __iomem *addr = plda->bridge_addr + CONFIG_SPACE_ADDR;
+
+ writel_relaxed(lower_32_bits(val), addr + PCI_BASE_ADDRESS_0);
+ writel_relaxed(upper_32_bits(val), addr + PCI_BASE_ADDRESS_1);
+}
+#endif /* _PCIE_PLDA_H */
diff --git a/drivers/pci/controller/plda/pcie-starfive.c b/drivers/pci/controller/plda/pcie-starfive.c
new file mode 100644
index 000000000000..a90bc85fd40b
--- /dev/null
+++ b/drivers/pci/controller/plda/pcie-starfive.c
@@ -0,0 +1,448 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * PCIe host controller driver for StarFive JH7110 Soc.
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include "../../pci.h"
+
+#include "pcie-plda.h"
+
+#define PCIE_FUNC_NUM 4
+
+/* system control */
+#define STG_SYSCON_PCIE0_BASE 0x48
+#define STG_SYSCON_PCIE1_BASE 0x1f8
+
+#define STG_SYSCON_ARFUNC_OFFSET 0x78
+#define STG_SYSCON_AXI4_SLVL_ARFUNC_MASK GENMASK(22, 8)
+#define STG_SYSCON_AXI4_SLVL_PHY_ARFUNC(x) FIELD_PREP(GENMASK(20, 17), x)
+#define STG_SYSCON_AWFUNC_OFFSET 0x7c
+#define STG_SYSCON_AXI4_SLVL_AWFUNC_MASK GENMASK(14, 0)
+#define STG_SYSCON_AXI4_SLVL_PHY_AWFUNC(x) FIELD_PREP(GENMASK(12, 9), x)
+#define STG_SYSCON_CLKREQ BIT(22)
+#define STG_SYSCON_CKREF_SRC_MASK GENMASK(19, 18)
+#define STG_SYSCON_RP_NEP_OFFSET 0xe8
+#define STG_SYSCON_K_RP_NEP BIT(8)
+#define STG_SYSCON_LNKSTA_OFFSET 0x170
+#define DATA_LINK_ACTIVE BIT(5)
+
+/* Parameters for the waiting for link up routine */
+#define LINK_WAIT_MAX_RETRIES 10
+#define LINK_WAIT_USLEEP_MIN 90000
+#define LINK_WAIT_USLEEP_MAX 100000
+
+struct starfive_jh7110_pcie {
+ struct plda_pcie_rp plda;
+ struct reset_control *resets;
+ struct clk_bulk_data *clks;
+ struct regmap *reg_syscon;
+ struct gpio_desc *power_gpio;
+ struct gpio_desc *reset_gpio;
+
+ unsigned int stg_pcie_base;
+ int num_clks;
+};
+
+/*
+ * The BAR0/1 of bridge should be hidden during enumeration to
+ * avoid the sizing and resource allocation by PCIe core.
+ */
+static bool starfive_pcie_hide_rc_bar(struct pci_bus *bus, unsigned int devfn,
+ int offset)
+{
+ if (pci_is_root_bus(bus) && !devfn &&
+ (offset == PCI_BASE_ADDRESS_0 || offset == PCI_BASE_ADDRESS_1))
+ return true;
+
+ return false;
+}
+
+static int starfive_pcie_config_write(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 value)
+{
+ if (starfive_pcie_hide_rc_bar(bus, devfn, where))
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ return pci_generic_config_write(bus, devfn, where, size, value);
+}
+
+static int starfive_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *value)
+{
+ if (starfive_pcie_hide_rc_bar(bus, devfn, where))
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ return pci_generic_config_read(bus, devfn, where, size, value);
+}
+
+static int starfive_pcie_parse_dt(struct starfive_jh7110_pcie *pcie, struct device *dev)
+{
+ int domain_nr;
+
+ pcie->num_clks = devm_clk_bulk_get_all(dev, &pcie->clks);
+ if (pcie->num_clks < 0)
+ return dev_err_probe(dev, -ENODEV,
+ "failed to get pcie clocks\n");
+
+ pcie->resets = devm_reset_control_array_get_exclusive(dev);
+ if (IS_ERR(pcie->resets))
+ return dev_err_probe(dev, PTR_ERR(pcie->resets),
+ "failed to get pcie resets");
+
+ pcie->reg_syscon =
+ syscon_regmap_lookup_by_phandle(dev->of_node,
+ "starfive,stg-syscon");
+
+ if (IS_ERR(pcie->reg_syscon))
+ return dev_err_probe(dev, PTR_ERR(pcie->reg_syscon),
+ "failed to parse starfive,stg-syscon\n");
+
+ domain_nr = of_get_pci_domain_nr(dev->of_node);
+
+ if (domain_nr < 0 || domain_nr > 1)
+ return dev_err_probe(dev, -ENODEV,
+ "failed to get valid pcie id\n");
+
+ if (domain_nr == 0)
+ pcie->stg_pcie_base = STG_SYSCON_PCIE0_BASE;
+ else
+ pcie->stg_pcie_base = STG_SYSCON_PCIE1_BASE;
+
+ pcie->reset_gpio = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
+ if (IS_ERR(pcie->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(pcie->reset_gpio),
+ "failed to get perst-gpio\n");
+
+ pcie->power_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(pcie->power_gpio))
+ return dev_err_probe(dev, PTR_ERR(pcie->power_gpio),
+ "failed to get power-gpio\n");
+
+ return 0;
+}
+
+static struct pci_ops starfive_pcie_ops = {
+ .map_bus = plda_pcie_map_bus,
+ .read = starfive_pcie_config_read,
+ .write = starfive_pcie_config_write,
+};
+
+static int starfive_pcie_clk_rst_init(struct starfive_jh7110_pcie *pcie)
+{
+ struct device *dev = pcie->plda.dev;
+ int ret;
+
+ ret = clk_bulk_prepare_enable(pcie->num_clks, pcie->clks);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to enable clocks\n");
+
+ ret = reset_control_deassert(pcie->resets);
+ if (ret) {
+ clk_bulk_disable_unprepare(pcie->num_clks, pcie->clks);
+ dev_err_probe(dev, ret, "failed to resets\n");
+ }
+
+ return ret;
+}
+
+static void starfive_pcie_clk_rst_deinit(struct starfive_jh7110_pcie *pcie)
+{
+ reset_control_assert(pcie->resets);
+ clk_bulk_disable_unprepare(pcie->num_clks, pcie->clks);
+}
+
+static bool starfive_pcie_link_up(struct plda_pcie_rp *plda)
+{
+ struct starfive_jh7110_pcie *pcie =
+ container_of(plda, struct starfive_jh7110_pcie, plda);
+ int ret;
+ u32 stg_reg_val;
+
+ ret = regmap_read(pcie->reg_syscon,
+ pcie->stg_pcie_base + STG_SYSCON_LNKSTA_OFFSET,
+ &stg_reg_val);
+ if (ret) {
+ dev_err(pcie->plda.dev, "failed to read link status\n");
+ return false;
+ }
+
+ return !!(stg_reg_val & DATA_LINK_ACTIVE);
+}
+
+static int starfive_pcie_host_wait_for_link(struct starfive_jh7110_pcie *pcie)
+{
+ int retries;
+
+ /* Check if the link is up or not */
+ for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
+ if (starfive_pcie_link_up(&pcie->plda)) {
+ dev_info(pcie->plda.dev, "port link up\n");
+ return 0;
+ }
+ usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int starfive_pcie_enable_phy(struct device *dev, struct plda_pcie_rp *pcie)
+{
+ int ret;
+
+ if (!pcie->phy)
+ return 0;
+
+ ret = phy_init(pcie->phy);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to initialize pcie phy\n");
+
+ ret = phy_set_mode(pcie->phy, PHY_MODE_PCIE);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to set pcie mode\n");
+ goto err_phy_on;
+ }
+
+ ret = phy_power_on(pcie->phy);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to power on pcie phy\n");
+ goto err_phy_on;
+ }
+
+ return 0;
+
+err_phy_on:
+ phy_exit(pcie->phy);
+ return ret;
+}
+
+static void starfive_pcie_disable_phy(struct plda_pcie_rp *pcie)
+{
+ phy_power_off(pcie->phy);
+ phy_exit(pcie->phy);
+}
+
+static void starfive_pcie_host_deinit(struct plda_pcie_rp *plda)
+{
+ struct starfive_jh7110_pcie *pcie =
+ container_of(plda, struct starfive_jh7110_pcie, plda);
+
+ starfive_pcie_clk_rst_deinit(pcie);
+ if (pcie->power_gpio)
+ gpiod_set_value_cansleep(pcie->power_gpio, 0);
+ starfive_pcie_disable_phy(plda);
+}
+
+static int starfive_pcie_host_init(struct plda_pcie_rp *plda)
+{
+ struct starfive_jh7110_pcie *pcie =
+ container_of(plda, struct starfive_jh7110_pcie, plda);
+ struct device *dev = plda->dev;
+ int ret;
+ int i;
+
+ ret = starfive_pcie_enable_phy(dev, plda);
+ if (ret)
+ return ret;
+
+ regmap_update_bits(pcie->reg_syscon,
+ pcie->stg_pcie_base + STG_SYSCON_RP_NEP_OFFSET,
+ STG_SYSCON_K_RP_NEP, STG_SYSCON_K_RP_NEP);
+
+ regmap_update_bits(pcie->reg_syscon,
+ pcie->stg_pcie_base + STG_SYSCON_AWFUNC_OFFSET,
+ STG_SYSCON_CKREF_SRC_MASK,
+ FIELD_PREP(STG_SYSCON_CKREF_SRC_MASK, 2));
+
+ regmap_update_bits(pcie->reg_syscon,
+ pcie->stg_pcie_base + STG_SYSCON_AWFUNC_OFFSET,
+ STG_SYSCON_CLKREQ, STG_SYSCON_CLKREQ);
+
+ ret = starfive_pcie_clk_rst_init(pcie);
+ if (ret)
+ return ret;
+
+ if (pcie->power_gpio)
+ gpiod_set_value_cansleep(pcie->power_gpio, 1);
+
+ if (pcie->reset_gpio)
+ gpiod_set_value_cansleep(pcie->reset_gpio, 1);
+
+ /* Disable physical functions except #0 */
+ for (i = 1; i < PCIE_FUNC_NUM; i++) {
+ regmap_update_bits(pcie->reg_syscon,
+ pcie->stg_pcie_base + STG_SYSCON_ARFUNC_OFFSET,
+ STG_SYSCON_AXI4_SLVL_ARFUNC_MASK,
+ STG_SYSCON_AXI4_SLVL_PHY_ARFUNC(i));
+
+ regmap_update_bits(pcie->reg_syscon,
+ pcie->stg_pcie_base + STG_SYSCON_AWFUNC_OFFSET,
+ STG_SYSCON_AXI4_SLVL_AWFUNC_MASK,
+ STG_SYSCON_AXI4_SLVL_PHY_AWFUNC(i));
+
+ plda_pcie_disable_func(plda);
+ }
+
+ regmap_update_bits(pcie->reg_syscon,
+ pcie->stg_pcie_base + STG_SYSCON_ARFUNC_OFFSET,
+ STG_SYSCON_AXI4_SLVL_ARFUNC_MASK, 0);
+ regmap_update_bits(pcie->reg_syscon,
+ pcie->stg_pcie_base + STG_SYSCON_AWFUNC_OFFSET,
+ STG_SYSCON_AXI4_SLVL_AWFUNC_MASK, 0);
+
+ plda_pcie_enable_root_port(plda);
+ plda_pcie_write_rc_bar(plda, 0);
+
+ /* PCIe PCI Standard Configuration Identification Settings. */
+ plda_pcie_set_standard_class(plda);
+
+ /*
+ * The LTR message forwarding of PCIe Message Reception was set by core
+ * as default, but the forward id & addr are also need to be reset.
+ * If we do not disable LTR message forwarding here, or set a legal
+ * forwarding address, the kernel will get stuck after this driver probe.
+ * To workaround, disable the LTR message forwarding support on
+ * PCIe Message Reception.
+ */
+ plda_pcie_disable_ltr(plda);
+
+ /* Prefetchable memory window 64-bit addressing support */
+ plda_pcie_set_pref_win_64bit(plda);
+
+ /* Ensure that PERST has been asserted for at least 100 ms,
+ * the sleep value is T_PVPERL from PCIe CEM spec r2.0 (Table 2-4)
+ */
+ msleep(100);
+ if (pcie->reset_gpio)
+ gpiod_set_value_cansleep(pcie->reset_gpio, 0);
+
+ /* As the requirement in PCIe base spec r6.0, system (<=5GT/s) must
+ * wait a minimum of 100 ms following exit from a conventional reset
+ * before sending a configuration request to the device.
+ */
+ msleep(100);
+
+ if (starfive_pcie_host_wait_for_link(pcie))
+ dev_info(dev, "port link down\n");
+
+ return ret;
+}
+
+static const struct plda_pcie_host_ops sf_host_ops = {
+ .host_init = starfive_pcie_host_init,
+ .host_deinit = starfive_pcie_host_deinit,
+};
+
+static int starfive_pcie_probe(struct platform_device *pdev)
+{
+ struct starfive_jh7110_pcie *pcie;
+ struct device *dev = &pdev->dev;
+ struct plda_pcie_rp *plda;
+ int ret;
+
+ pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+
+ plda = &pcie->plda;
+ plda->dev = dev;
+
+ ret = starfive_pcie_parse_dt(pcie, dev);
+ if (ret)
+ return ret;
+
+ plda->host_ops = &sf_host_ops;
+ plda->num_events = NUM_PLDA_EVENTS;
+ ret = plda_pcie_host_init(&pcie->plda, &starfive_pcie_ops);
+ if (ret)
+ return ret;
+
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+ platform_set_drvdata(pdev, pcie);
+
+ return 0;
+}
+
+static void starfive_pcie_remove(struct platform_device *pdev)
+{
+ struct starfive_jh7110_pcie *pcie = platform_get_drvdata(pdev);
+
+ plda_pcie_host_deinit(&pcie->plda);
+ platform_set_drvdata(pdev, NULL);
+}
+
+static int starfive_pcie_suspend_noirq(struct device *dev)
+{
+ struct starfive_jh7110_pcie *pcie = dev_get_drvdata(dev);
+
+ if (!pcie)
+ return 0;
+
+ clk_bulk_disable_unprepare(pcie->num_clks, pcie->clks);
+ starfive_pcie_disable_phy(&pcie->plda);
+
+ return 0;
+}
+
+static int starfive_pcie_resume_noirq(struct device *dev)
+{
+ struct starfive_jh7110_pcie *pcie = dev_get_drvdata(dev);
+ int ret;
+
+ ret = starfive_pcie_enable_phy(dev, &pcie->plda);
+ if (ret)
+ return ret;
+
+ ret = clk_bulk_prepare_enable(pcie->num_clks, pcie->clks);
+ if (ret) {
+ dev_err(dev, "failed to enable clocks\n");
+ starfive_pcie_disable_phy(&pcie->plda);
+ return ret;
+ }
+
+ return ret;
+}
+
+static const struct dev_pm_ops starfive_pcie_pm_ops = {
+ NOIRQ_SYSTEM_SLEEP_PM_OPS(starfive_pcie_suspend_noirq,
+ starfive_pcie_resume_noirq)
+};
+
+static const struct of_device_id starfive_pcie_of_match[] = {
+ { .compatible = "starfive,jh7110-pcie", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, starfive_pcie_of_match);
+
+static struct platform_driver starfive_pcie_driver = {
+ .driver = {
+ .name = "pcie-starfive",
+ .of_match_table = of_match_ptr(starfive_pcie_of_match),
+ .pm = pm_sleep_ptr(&starfive_pcie_pm_ops),
+ },
+ .probe = starfive_pcie_probe,
+ .remove_new = starfive_pcie_remove,
+};
+module_platform_driver(starfive_pcie_driver);
+
+MODULE_DESCRIPTION("StarFive JH7110 PCIe host driver");
+MODULE_LICENSE("GPL v2");
--
2.17.1
For different interrupts to event num mapping function,
add get_events() function pointer.
For extenting event ops in the fucture, Add struct
plda_event_ops data structure.
plda_handle_events() will call the get_events() callback
function pointer directly. For the robustness of codes,
add checking in plda_init_interrupts().
Signed-off-by: Minda Chen <[email protected]>
---
drivers/pci/controller/plda/pcie-microchip-host.c | 14 +++++++++++++-
drivers/pci/controller/plda/pcie-plda.h | 8 ++++++++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index e99498b5b563..fca1520d56c9 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -647,7 +647,7 @@ static void plda_handle_event(struct irq_desc *desc)
chained_irq_enter(chip, desc);
- events = mc_get_events(port);
+ events = port->event_ops->get_events(port);
for_each_set_bit(bit, &events, port->num_events)
generic_handle_domain_irq(port->event_domain, bit);
@@ -806,7 +806,12 @@ static int mc_request_event_irq(struct plda_pcie_rp *plda, int event_irq,
0, event_cause[event].sym, plda);
}
+static const struct plda_event_ops mc_event_ops = {
+ .get_events = mc_get_events,
+};
+
static const struct plda_event mc_event = {
+ .event_ops = &mc_event_ops,
.request_event_irq = mc_request_event_irq,
.intx_event = EVENT_LOCAL_PM_MSI_INT_INTX,
.msi_event = EVENT_LOCAL_PM_MSI_INT_MSI,
@@ -920,6 +925,11 @@ static int plda_init_interrupts(struct platform_device *pdev,
int i, intx_irq, msi_irq, event_irq;
int ret;
+ if (!event->event_ops || !event->event_ops->get_events) {
+ dev_err(dev, "no get events ops\n");
+ return -EINVAL;
+ }
+
ret = plda_pcie_init_irq_domains(port);
if (ret) {
dev_err(dev, "failed creating IRQ domains\n");
@@ -930,6 +940,8 @@ static int plda_init_interrupts(struct platform_device *pdev,
if (irq < 0)
return -ENODEV;
+ port->event_ops = event->event_ops;
+
for (i = 0; i < port->num_events; i++) {
event_irq = irq_create_mapping(port->event_domain, i);
if (!event_irq) {
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 5ad1b81c0086..6571a4befac9 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -102,6 +102,12 @@
#define EVENT_PM_MSI_INT_SYS_ERR 12
#define NUM_PLDA_EVENTS 13
+struct plda_pcie_rp;
+
+struct plda_event_ops {
+ u32 (*get_events)(struct plda_pcie_rp *pcie);
+};
+
struct plda_msi {
struct mutex lock; /* Protect used bitmap */
struct irq_domain *msi_domain;
@@ -117,11 +123,13 @@ struct plda_pcie_rp {
struct irq_domain *event_domain;
raw_spinlock_t lock;
struct plda_msi msi;
+ const struct plda_event_ops *event_ops;
void __iomem *bridge_addr;
int num_events;
};
struct plda_event {
+ const struct plda_event_ops *event_ops;
int (*request_event_irq)(struct plda_pcie_rp *pcie,
int event_irq, int event);
int intx_event;
--
2.17.1
For PolarFire implements non-PLDA local interrupt events, most of
event interrupt process codes can not be re-used. PLDA implements
new codes and IRQ domain ops like PolarFire.
plda_get_events() adds interrupt register to event num mapping codes
for PLDA local event except DMA engine interrupt events. The DMA engine
interrupt events are implemented by vendors.
The codes basic logic is interrupt register and event num bi-direction
mapping. So draw a graph of interrupt register and event num
description.
Signed-off-by: Minda Chen <[email protected]>
---
drivers/pci/controller/plda/pcie-plda-host.c | 105 ++++++++++++++++++-
drivers/pci/controller/plda/pcie-plda.h | 28 +++++
2 files changed, 132 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
index 4a4a2b5ef8fb..4f2e4827bbf9 100644
--- a/drivers/pci/controller/plda/pcie-plda-host.c
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -257,6 +257,106 @@ static irqreturn_t plda_event_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static u32 plda_get_events(struct plda_pcie_rp *port)
+{
+ u32 events, val, origin;
+
+ origin = readl_relaxed(port->bridge_addr + ISTATUS_LOCAL);
+
+ /* Error events and doorbell events */
+ events = (origin & ERROR_AND_DOORBELL_MASK) >> A_ATR_EVT_POST_ERR_SHIFT;
+
+ /* INTx events */
+ if (origin & PM_MSI_INT_INTX_MASK)
+ events |= BIT(EVENT_PM_MSI_INT_INTX);
+
+ /* MSI event and sys events */
+ val = (origin & SYS_AND_MSI_MASK) >> PM_MSI_INT_MSI_SHIFT;
+ events |= val << EVENT_PM_MSI_INT_MSI;
+
+ return events;
+}
+
+static u32 plda_hwirq_to_mask(int hwirq)
+{
+ u32 mask;
+
+ if (hwirq < EVENT_PM_MSI_INT_INTX)
+ mask = BIT(hwirq + A_ATR_EVT_POST_ERR_SHIFT);
+ else if (hwirq == EVENT_PM_MSI_INT_INTX)
+ mask = PM_MSI_INT_INTX_MASK;
+ else
+ mask = BIT(hwirq + PM_MSI_TO_MASK_OFFSET);
+
+ return mask;
+}
+
+static void plda_ack_event_irq(struct irq_data *data)
+{
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+
+ writel_relaxed(plda_hwirq_to_mask(data->hwirq),
+ port->bridge_addr + ISTATUS_LOCAL);
+}
+
+static void plda_mask_event_irq(struct irq_data *data)
+{
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ u32 mask, val;
+
+ mask = plda_hwirq_to_mask(data->hwirq);
+
+ raw_spin_lock(&port->lock);
+ val = readl_relaxed(port->bridge_addr + IMASK_LOCAL);
+ val &= ~mask;
+ writel_relaxed(val, port->bridge_addr + IMASK_LOCAL);
+ raw_spin_unlock(&port->lock);
+}
+
+static void plda_unmask_event_irq(struct irq_data *data)
+{
+ struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+ u32 mask, val;
+
+ mask = plda_hwirq_to_mask(data->hwirq);
+
+ raw_spin_lock(&port->lock);
+ val = readl_relaxed(port->bridge_addr + IMASK_LOCAL);
+ val |= mask;
+ writel_relaxed(val, port->bridge_addr + IMASK_LOCAL);
+ raw_spin_unlock(&port->lock);
+}
+
+static struct irq_chip plda_event_irq_chip = {
+ .name = "PLDA PCIe EVENT",
+ .irq_ack = plda_ack_event_irq,
+ .irq_mask = plda_mask_event_irq,
+ .irq_unmask = plda_unmask_event_irq,
+};
+
+static int plda_pcie_event_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(irq, &plda_event_irq_chip, handle_level_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops plda_evt_dom_ops = {
+ .map = plda_pcie_event_map,
+};
+
+static const struct plda_event_ops plda_event_ops = {
+ .get_events = plda_get_events,
+};
+
+struct plda_event plda_default_event = {
+ .event_ops = &plda_event_ops,
+ .intx_event = EVENT_PM_MSI_INT_INTX,
+ .msi_event = EVENT_PM_MSI_INT_MSI
+};
+
static void plda_handle_event(struct irq_desc *desc)
{
struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
@@ -323,13 +423,16 @@ int plda_init_interrupts(struct platform_device *pdev,
int irq;
int i, intx_irq, msi_irq, event_irq;
int ret;
+ const struct irq_domain_ops *irq_dom_ops;
if (!event->event_ops || !event->event_ops->get_events) {
dev_err(dev, "no get events ops\n");
return -EINVAL;
}
- ret = plda_pcie_init_irq_domains(port, event->domain_ops);
+ irq_dom_ops = event->domain_ops ?: &plda_evt_dom_ops;
+
+ ret = plda_pcie_init_irq_domains(port, irq_dom_ops);
if (ret) {
dev_err(dev, "failed creating IRQ domains\n");
return ret;
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index ce7787aef4b7..e0f8fd5ed46a 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -40,6 +40,7 @@
#define P_ATR_EVT_DISCARD_ERR_SHIFT 22
#define P_ATR_EVT_DOORBELL_MASK 0x00000000u
#define P_ATR_EVT_DOORBELL_SHIFT 23
+#define ERROR_AND_DOORBELL_MASK GENMASK(23, 16)
#define PM_MSI_INT_INTA_MASK 0x01000000u
#define PM_MSI_INT_INTA_SHIFT 24
#define PM_MSI_INT_INTB_MASK 0x02000000u
@@ -58,6 +59,7 @@
#define PM_MSI_INT_EVENTS_SHIFT 30
#define PM_MSI_INT_SYS_ERR_MASK 0x80000000u
#define PM_MSI_INT_SYS_ERR_SHIFT 31
+#define SYS_AND_MSI_MASK GENMASK(31, 28)
#define NUM_LOCAL_EVENTS 15
#define ISTATUS_LOCAL 0x184
#define IMASK_HOST 0x188
@@ -102,6 +104,32 @@
#define EVENT_PM_MSI_INT_SYS_ERR 12
#define NUM_PLDA_EVENTS 13
+/*
+ * PLDA local interrupt register
+ *
+ * 31 27 23 15 7 0
+ * +--+--+--+-+------+-+-+-+-+-+-+-+-+-----------+-----------+
+ * |12|11|10|9| intx |7|6|5|4|3|2|1|0| DMA error | DMA end |
+ * +--+--+--+-+------+-+-+-+-+-+-+-+-+-----------+-----------+
+ * 0: AXI post error
+ * 1: AXI fetch error
+ * 2: AXI discard error
+ * 3: AXI doorbell
+ * 4: PCIe post error
+ * 5: PCIe fetch error
+ * 6: PCIe discard error
+ * 7: PCIe doorbell
+ * 8: 4 INTx interruts
+ * 9: MSI interrupt
+ * 10: AER event
+ * 11: PM/LTR/Hotplug
+ * 12: System error
+ * DMA error : reserved for vendor implement
+ * DMA end : reserved for vendor implement
+ */
+
+#define PM_MSI_TO_MASK_OFFSET 19
+
struct plda_pcie_rp;
struct plda_event_ops {
--
2.17.1
The event num is different in other platform. For re-use
interrupt process codes, replace with variable.
Signed-off-by: Minda Chen <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
---
drivers/pci/controller/plda/pcie-microchip-host.c | 7 ++++---
drivers/pci/controller/plda/pcie-plda.h | 1 +
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 5a20d5a03d36..1799455989ac 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -649,7 +649,7 @@ static void plda_handle_event(struct irq_desc *desc)
events = mc_get_events(port);
- for_each_set_bit(bit, &events, NUM_EVENTS)
+ for_each_set_bit(bit, &events, port->num_events)
generic_handle_domain_irq(port->event_domain, bit);
chained_irq_exit(chip, desc);
@@ -812,7 +812,7 @@ static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
return -EINVAL;
}
- port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS,
+ port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events,
&mc_event_domain_ops, port);
if (!port->event_domain) {
dev_err(dev, "failed to get event domain\n");
@@ -915,7 +915,7 @@ static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_r
if (irq < 0)
return -ENODEV;
- for (i = 0; i < NUM_EVENTS; i++) {
+ for (i = 0; i < port->num_events; i++) {
event_irq = irq_create_mapping(port->event_domain, i);
if (!event_irq) {
dev_err(dev, "failed to map hwirq %d\n", i);
@@ -1007,6 +1007,7 @@ static int mc_host_probe(struct platform_device *pdev)
bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
plda->bridge_addr = bridge_base_addr;
+ plda->num_events = NUM_EVENTS;
/* Allow enabling MSI by disabling MSI-X */
val = readl(bridge_base_addr + PCIE_PCI_IRQ_DW0);
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 7ff7ff44c980..b439160448b1 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -118,6 +118,7 @@ struct plda_pcie_rp {
raw_spinlock_t lock;
struct plda_msi msi;
void __iomem *bridge_addr;
+ int num_events;
};
irqreturn_t plda_event_handler(int irq, void *dev_id);
--
2.17.1
Add PCIe dts configuraion for JH7110 SoC platform.
Signed-off-by: Minda Chen <[email protected]>
Reviewed-by: Hal Feng <[email protected]>
---
.../jh7110-starfive-visionfive-2.dtsi | 64 ++++++++++++++
arch/riscv/boot/dts/starfive/jh7110.dtsi | 86 +++++++++++++++++++
2 files changed, 150 insertions(+)
diff --git a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
index 12ebe9792356..2e7bec59c3b8 100644
--- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
@@ -232,6 +232,22 @@
status = "okay";
};
+&pcie0 {
+ perst-gpios = <&sysgpio 26 GPIO_ACTIVE_LOW>;
+ phys = <&pciephy0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pcie0_pins>;
+ status = "okay";
+};
+
+&pcie1 {
+ perst-gpios = <&sysgpio 28 GPIO_ACTIVE_LOW>;
+ phys = <&pciephy1>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pcie1_pins>;
+ status = "okay";
+};
+
&qspi {
#address-cells = <1>;
#size-cells = <0>;
@@ -402,6 +418,54 @@
};
};
+ pcie0_pins: pcie0-0 {
+ clkreq-pins {
+ pinmux = <GPIOMUX(27, GPOUT_LOW,
+ GPOEN_DISABLE,
+ GPI_NONE)>;
+ bias-pull-down;
+ drive-strength = <2>;
+ input-enable;
+ input-schmitt-disable;
+ slew-rate = <0>;
+ };
+
+ wake-pins {
+ pinmux = <GPIOMUX(32, GPOUT_LOW,
+ GPOEN_DISABLE,
+ GPI_NONE)>;
+ bias-pull-up;
+ drive-strength = <2>;
+ input-enable;
+ input-schmitt-disable;
+ slew-rate = <0>;
+ };
+ };
+
+ pcie1_pins: pcie1-0 {
+ clkreq-pins {
+ pinmux = <GPIOMUX(29, GPOUT_LOW,
+ GPOEN_DISABLE,
+ GPI_NONE)>;
+ bias-pull-down;
+ drive-strength = <2>;
+ input-enable;
+ input-schmitt-disable;
+ slew-rate = <0>;
+ };
+
+ wake-pins {
+ pinmux = <GPIOMUX(21, GPOUT_LOW,
+ GPOEN_DISABLE,
+ GPI_NONE)>;
+ bias-pull-up;
+ drive-strength = <2>;
+ input-enable;
+ input-schmitt-disable;
+ slew-rate = <0>;
+ };
+ };
+
spi0_pins: spi0-0 {
mosi-pins {
pinmux = <GPIOMUX(52, GPOUT_SYS_SPI0_TXD,
diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi
index e85464c328d0..1a1e97287c5e 100644
--- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
@@ -1045,5 +1045,91 @@
#reset-cells = <1>;
power-domains = <&pwrc JH7110_PD_VOUT>;
};
+
+ pcie0: pcie@940000000 {
+ compatible = "starfive,jh7110-pcie";
+ reg = <0x9 0x40000000 0x0 0x1000000>,
+ <0x0 0x2b000000 0x0 0x100000>;
+ reg-names = "cfg", "apb";
+ linux,pci-domain = <0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ ranges = <0x82000000 0x0 0x30000000 0x0 0x30000000 0x0 0x08000000>,
+ <0xc3000000 0x9 0x00000000 0x9 0x00000000 0x0 0x40000000>;
+ interrupts = <56>;
+ interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+ interrupt-map = <0x0 0x0 0x0 0x1 &pcie_intc0 0x1>,
+ <0x0 0x0 0x0 0x2 &pcie_intc0 0x2>,
+ <0x0 0x0 0x0 0x3 &pcie_intc0 0x3>,
+ <0x0 0x0 0x0 0x4 &pcie_intc0 0x4>;
+ msi-controller;
+ device_type = "pci";
+ starfive,stg-syscon = <&stg_syscon>;
+ bus-range = <0x0 0xff>;
+ clocks = <&syscrg JH7110_SYSCLK_NOC_BUS_STG_AXI>,
+ <&stgcrg JH7110_STGCLK_PCIE0_TL>,
+ <&stgcrg JH7110_STGCLK_PCIE0_AXI_MST0>,
+ <&stgcrg JH7110_STGCLK_PCIE0_APB>;
+ clock-names = "noc", "tl", "axi_mst0", "apb";
+ resets = <&stgcrg JH7110_STGRST_PCIE0_AXI_MST0>,
+ <&stgcrg JH7110_STGRST_PCIE0_AXI_SLV0>,
+ <&stgcrg JH7110_STGRST_PCIE0_AXI_SLV>,
+ <&stgcrg JH7110_STGRST_PCIE0_BRG>,
+ <&stgcrg JH7110_STGRST_PCIE0_CORE>,
+ <&stgcrg JH7110_STGRST_PCIE0_APB>;
+ reset-names = "mst0", "slv0", "slv", "brg",
+ "core", "apb";
+ status = "disabled";
+
+ pcie_intc0: interrupt-controller {
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
+ pcie1: pcie@9c0000000 {
+ compatible = "starfive,jh7110-pcie";
+ reg = <0x9 0xc0000000 0x0 0x1000000>,
+ <0x0 0x2c000000 0x0 0x100000>;
+ reg-names = "cfg", "apb";
+ linux,pci-domain = <1>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ ranges = <0x82000000 0x0 0x38000000 0x0 0x38000000 0x0 0x08000000>,
+ <0xc3000000 0x9 0x80000000 0x9 0x80000000 0x0 0x40000000>;
+ interrupts = <57>;
+ interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+ interrupt-map = <0x0 0x0 0x0 0x1 &pcie_intc1 0x1>,
+ <0x0 0x0 0x0 0x2 &pcie_intc1 0x2>,
+ <0x0 0x0 0x0 0x3 &pcie_intc1 0x3>,
+ <0x0 0x0 0x0 0x4 &pcie_intc1 0x4>;
+ msi-controller;
+ device_type = "pci";
+ starfive,stg-syscon = <&stg_syscon>;
+ bus-range = <0x0 0xff>;
+ clocks = <&syscrg JH7110_SYSCLK_NOC_BUS_STG_AXI>,
+ <&stgcrg JH7110_STGCLK_PCIE1_TL>,
+ <&stgcrg JH7110_STGCLK_PCIE1_AXI_MST0>,
+ <&stgcrg JH7110_STGCLK_PCIE1_APB>;
+ clock-names = "noc", "tl", "axi_mst0", "apb";
+ resets = <&stgcrg JH7110_STGRST_PCIE1_AXI_MST0>,
+ <&stgcrg JH7110_STGRST_PCIE1_AXI_SLV0>,
+ <&stgcrg JH7110_STGRST_PCIE1_AXI_SLV>,
+ <&stgcrg JH7110_STGRST_PCIE1_BRG>,
+ <&stgcrg JH7110_STGRST_PCIE1_CORE>,
+ <&stgcrg JH7110_STGRST_PCIE1_APB>;
+ reset-names = "mst0", "slv0", "slv", "brg",
+ "core", "apb";
+ status = "disabled";
+
+ pcie_intc1: interrupt-controller {
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
};
};
--
2.17.1
On 2023/10/11 19:04, Minda Chen wrote:
> This patchset final purpose is add PCIe driver for StarFive JH7110 SoC.
> JH7110 using PLDA XpressRICH PCIe IP. Microchip PolarFire Using the
> same IP and have commit their codes, which are mixed with PLDA
> controller codes and Microchip platform codes.
>
> For re-use the PLDA controller codes, I request refactoring microchip
> codes, move PLDA common codes to PLDA files.
> Desigware and Cadence is good example for refactoring codes.
>
> ----------------------------------------------------------
> The refactoring patches total number is 17,(patch 1-17)
> which do NOT contain changing logic of codes.
>
> These patches just contain three type basic operations.
> (rename, modify codes to support starfive platform, and moving to common file)
> If these patched are all be reviewed. They can be accepted first.
>
> Refactoring patches can be devided to different groups
> 1. (patch 1- 3 is the prepare work of refactoring)
> patch1 is move PLDA XpressRICH PCIe host common properties dt-binding
> docs from microchip,pcie-host.yaml
> patch2 is move PolarFire codes to PLDA directory.
> patch3 is move PLDA IP register macros to plda-pcie.h
>
> 2. (patch4 - 6 is processing and re-use PCIe host instance)
> patch4 is add bridge_addr field to PCIe host instance.
> patch5 is rename data structure in microchip codes.
> patch6 is moving two data structures to head file
>
> 3. (patch 7 - 9 are for re-use two PCIe setup function)
> patch7 is rename two setup functions in microchip codes, prepare to move
> to common file.
> patch8 is change the arguments of plda_pcie_setup_iomems()
> patch9 is move the two setup functions to common file pcie-plda-host.c
>
> 4.(patch 10 - 17 are for re-use interupt processing codes)
> patch10 add a plda default event handler function.
> patch11 is rename the IRQ related functions, prepare to move to
> pcie-plda-host.c
> patch 12 - 16 is modify the interrupt event codes, preparing for support starfive
> and microchip two platforms.
> patch17 is move IRQ related functions to pcie-plda-host.c
>
> ------------------------------------------------------------
> The remainder patches (patch 18 -22) are not refactoring patch.
> They are for adding StarFive codes and dont modify the microchip's
> codes.
>
> patch18 is set plda_event_handler to static.
> patch19 is Add PLDA event interrupt codes and IRQ domain ops.
> patch20 is add StarFive JH7110 PCIe dt-binding doc.
> patch21 is add StarFive JH7110 Soc PCIe codes.
> patch22 is Starfive dts config
>
> This patchset is base on v6.6-rc5
>
Hi Kzysztof(K.W)
Could you please take time to review this series patches? Thanks.
Hi Conor
The patch 4- 6 is split from previous version patch. You have added your review tag to that patch.
May I add your review tag to patch 4 -6 ?
And linux-riscv do NOT run compile test to this patch set.
Reviewed-by: Conor Dooley <[email protected]>
Thanks,
Conor.
On Wed, Oct 11, 2023 at 07:04:58PM +0800, Minda Chen wrote:
> Move the common data structures definition to head file for
nit: "to a header file so that these data structures"
> these data structure can be re-used.
>
> Signed-off-by: Minda Chen <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Thanks,
Conor.
> ---
> .../pci/controller/plda/pcie-microchip-host.c | 20 ------------------
> drivers/pci/controller/plda/pcie-plda.h | 21 +++++++++++++++++++
> 2 files changed, 21 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
> index 3dc4d4ca9d0c..261147a0a446 100644
> --- a/drivers/pci/controller/plda/pcie-microchip-host.c
> +++ b/drivers/pci/controller/plda/pcie-microchip-host.c
> @@ -21,9 +21,6 @@
> #include "../../pci.h"
> #include "pcie-plda.h"
>
> -/* Number of MSI IRQs */
> -#define PLDA_MAX_NUM_MSI_IRQS 32
> -
> /* PCIe Bridge Phy and Controller Phy offsets */
> #define MC_PCIE1_BRIDGE_ADDR 0x00008000u
> #define MC_PCIE1_CTRL_ADDR 0x0000a000u
> @@ -179,23 +176,6 @@ struct event_map {
> u32 event_bit;
> };
>
> -struct plda_msi {
> - struct mutex lock; /* Protect used bitmap */
> - struct irq_domain *msi_domain;
> - struct irq_domain *dev_domain;
> - u32 num_vectors;
> - u64 vector_phy;
> - DECLARE_BITMAP(used, PLDA_MAX_NUM_MSI_IRQS);
> -};
> -
> -struct plda_pcie_rp {
> - struct device *dev;
> - struct irq_domain *intx_domain;
> - struct irq_domain *event_domain;
> - raw_spinlock_t lock;
> - struct plda_msi msi;
> - void __iomem *bridge_addr;
> -};
>
> struct mc_pcie {
> struct plda_pcie_rp plda;
> diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
> index 727fc54312c9..363fcbbaf6ec 100644
> --- a/drivers/pci/controller/plda/pcie-plda.h
> +++ b/drivers/pci/controller/plda/pcie-plda.h
> @@ -6,6 +6,9 @@
> #ifndef _PCIE_PLDA_H
> #define _PCIE_PLDA_H
>
> +/* Number of MSI IRQs */
> +#define PLDA_MAX_NUM_MSI_IRQS 32
> +
> /* PCIe Bridge Phy Regs */
> #define PCIE_PCI_IRQ_DW0 0xa8
> #define MSIX_CAP_MASK BIT(31)
> @@ -99,4 +102,22 @@
> #define EVENT_PM_MSI_INT_SYS_ERR 12
> #define NUM_PLDA_EVENTS 13
>
> +struct plda_msi {
> + struct mutex lock; /* Protect used bitmap */
> + struct irq_domain *msi_domain;
> + struct irq_domain *dev_domain;
> + u32 num_vectors;
> + u64 vector_phy;
> + DECLARE_BITMAP(used, PLDA_MAX_NUM_MSI_IRQS);
> +};
> +
> +struct plda_pcie_rp {
> + struct device *dev;
> + struct irq_domain *intx_domain;
> + struct irq_domain *event_domain;
> + raw_spinlock_t lock;
> + struct plda_msi msi;
> + void __iomem *bridge_addr;
> +};
> +
> #endif
> --
> 2.17.1
>
On Wed, Oct 11, 2023 at 07:05:02PM +0800, Minda Chen wrote:
> Add PLDA default event IRQ handler.
> This is first patch of refactoring IRQ handling codes.
> The handler function will be referenced by later patch.
>
> Signed-off-by: Minda Chen <[email protected]>
> ---
> drivers/pci/controller/plda/pcie-plda-host.c | 5 +++++
> drivers/pci/controller/plda/pcie-plda.h | 1 +
Dunno what hte PCI maintainers take is on this kind of thing, but this
patch adds dead code, as there is no user for it until the follow-on
patch you mention. Did someone ask you to split this out?
Cheers,
Conor.
> 2 files changed, 6 insertions(+)
>
> diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
> index 19131181897f..21ca6b460f5e 100644
> --- a/drivers/pci/controller/plda/pcie-plda-host.c
> +++ b/drivers/pci/controller/plda/pcie-plda-host.c
> @@ -18,6 +18,11 @@
>
> #include "pcie-plda.h"
>
> +irqreturn_t plda_event_handler(int irq, void *dev_id)
> +{
> + return IRQ_HANDLED;
> +}
> +
> void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
> phys_addr_t axi_addr, phys_addr_t pci_addr,
> size_t size)
> diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
> index 3deefd35fa5a..7ff7ff44c980 100644
> --- a/drivers/pci/controller/plda/pcie-plda.h
> +++ b/drivers/pci/controller/plda/pcie-plda.h
> @@ -120,6 +120,7 @@ struct plda_pcie_rp {
> void __iomem *bridge_addr;
> };
>
> +irqreturn_t plda_event_handler(int irq, void *dev_id);
> void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
> phys_addr_t axi_addr, phys_addr_t pci_addr,
> size_t size);
> --
> 2.17.1
>
On 2023/10/18 18:44, Conor Dooley wrote:
> On Wed, Oct 11, 2023 at 07:05:02PM +0800, Minda Chen wrote:
>> Add PLDA default event IRQ handler.
>> This is first patch of refactoring IRQ handling codes.
>> The handler function will be referenced by later patch.
>>
>> Signed-off-by: Minda Chen <[email protected]>
>> ---
>> drivers/pci/controller/plda/pcie-plda-host.c | 5 +++++
>> drivers/pci/controller/plda/pcie-plda.h | 1 +
>
> Dunno what hte PCI maintainers take is on this kind of thing, but this
> patch adds dead code, as there is no user for it until the follow-on
> patch you mention. Did someone ask you to split this out?
>
> Cheers,
> Conor.
>
No one. Previous this patch contain other codes. I modify this incorrect. I will squash this with other patch. Thanks.
>> 2 files changed, 6 insertions(+)
>>
>> diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
>> index 19131181897f..21ca6b460f5e 100644
>> --- a/drivers/pci/controller/plda/pcie-plda-host.c
>> +++ b/drivers/pci/controller/plda/pcie-plda-host.c
>> @@ -18,6 +18,11 @@
>>
>> #include "pcie-plda.h"
>>
>> +irqreturn_t plda_event_handler(int irq, void *dev_id)
>> +{
>> + return IRQ_HANDLED;
>> +}
>> +
>> void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
>> phys_addr_t axi_addr, phys_addr_t pci_addr,
>> size_t size)
>> diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
>> index 3deefd35fa5a..7ff7ff44c980 100644
>> --- a/drivers/pci/controller/plda/pcie-plda.h
>> +++ b/drivers/pci/controller/plda/pcie-plda.h
>> @@ -120,6 +120,7 @@ struct plda_pcie_rp {
>> void __iomem *bridge_addr;
>> };
>>
>> +irqreturn_t plda_event_handler(int irq, void *dev_id);
>> void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
>> phys_addr_t axi_addr, phys_addr_t pci_addr,
>> size_t size);
>> --
>> 2.17.1
>>
On Wed, Oct 11, 2023 at 07:05:05PM +0800, Minda Chen wrote:
> PolarFire implements specific interrupts besides PLDA local
> interrupt and register their interrupt symbol name.
> (Total 28
> interrupts while PLDA contain 13 local interrupts). and
> interrupt to event mapping is different.
Nit: drop the ()s & the first .
Daire would have to speak to why this is the case, but these commit
message appears to better explain why the patch is needed.
Acked-by: Conor Dooley <[email protected]>
> So add a callback function to support different IRQ register
> function.
>
> Signed-off-by: Minda Chen <[email protected]>
> ---
> .../pci/controller/plda/pcie-microchip-host.c | 25 ++++++++++++++++---
> drivers/pci/controller/plda/pcie-plda.h | 5 ++++
> 2 files changed, 26 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
> index 1799455989ac..104332603e25 100644
> --- a/drivers/pci/controller/plda/pcie-microchip-host.c
> +++ b/drivers/pci/controller/plda/pcie-microchip-host.c
> @@ -799,6 +799,17 @@ static int mc_pcie_init_clks(struct device *dev)
> return 0;
> }
>
> +static int mc_request_event_irq(struct plda_pcie_rp *plda, int event_irq,
> + int event)
> +{
> + return devm_request_irq(plda->dev, event_irq, mc_event_handler,
> + 0, event_cause[event].sym, plda);
> +}
> +
> +static const struct plda_event mc_event = {
> + .request_event_irq = mc_request_event_irq,
nit: these spaces for alignment look pointless when there's just one
element.
Cheers,
Conor.
> +};
> +
> static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
> {
> struct device *dev = port->dev;
> @@ -898,7 +909,9 @@ static void mc_disable_interrupts(struct mc_pcie *port)
> writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
> }
>
> -static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port)
> +static int plda_init_interrupts(struct platform_device *pdev,
> + struct plda_pcie_rp *port,
> + const struct plda_event *event)
> {
> struct device *dev = &pdev->dev;
> int irq;
> @@ -922,8 +935,12 @@ static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_r
> return -ENXIO;
> }
>
> - ret = devm_request_irq(dev, event_irq, mc_event_handler,
> - 0, event_cause[i].sym, port);
> + if (event->request_event_irq)
> + ret = event->request_event_irq(port, event_irq, i);
> + else
> + ret = devm_request_irq(dev, event_irq, plda_event_handler,
> + 0, NULL, port);
> +
> if (ret) {
> dev_err(dev, "failed to request IRQ %d\n", event_irq);
> return ret;
> @@ -977,7 +994,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
> return ret;
>
> /* Address translation is up; safe to enable interrupts */
> - ret = plda_init_interrupts(pdev, &port->plda);
> + ret = plda_init_interrupts(pdev, &port->plda, &mc_event);
> if (ret)
> return ret;
>
> diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
> index b439160448b1..907ad40f3188 100644
> --- a/drivers/pci/controller/plda/pcie-plda.h
> +++ b/drivers/pci/controller/plda/pcie-plda.h
> @@ -121,6 +121,11 @@ struct plda_pcie_rp {
> int num_events;
> };
>
> +struct plda_event {
> + int (*request_event_irq)(struct plda_pcie_rp *pcie,
> + int event_irq, int event);
> +};
> +
> irqreturn_t plda_event_handler(int irq, void *dev_id);
> void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
> phys_addr_t axi_addr, phys_addr_t pci_addr,
> --
> 2.17.1
>
On Wed, Oct 11, 2023 at 07:05:08PM +0800, Minda Chen wrote:
> PolarFire Implements none-PLDA event interrupts. So the whole event
> domain ops can not be re-used.
IIRC, the reason things are like this is to work around the lack of an
msi controller and are not as a result of changes made to the PLDA IP
by us.
> PLDA event domain ops instances will be implemented
> in later patch.
Acked-by: Conor Dooley <[email protected]>
Thanks,
Conor.
>
> Signed-off-by: Minda Chen <[email protected]>
> ---
> drivers/pci/controller/plda/pcie-microchip-host.c | 9 ++++++---
> drivers/pci/controller/plda/pcie-plda.h | 1 +
> 2 files changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
> index fca1520d56c9..2825c1f5563d 100644
> --- a/drivers/pci/controller/plda/pcie-microchip-host.c
> +++ b/drivers/pci/controller/plda/pcie-microchip-host.c
> @@ -811,13 +811,15 @@ static const struct plda_event_ops mc_event_ops = {
> };
>
> static const struct plda_event mc_event = {
> + .domain_ops = &mc_event_domain_ops,
> .event_ops = &mc_event_ops,
> .request_event_irq = mc_request_event_irq,
> .intx_event = EVENT_LOCAL_PM_MSI_INT_INTX,
> .msi_event = EVENT_LOCAL_PM_MSI_INT_MSI,
> };
>
> -static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
> +static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port,
> + const struct irq_domain_ops *ops)
> {
> struct device *dev = port->dev;
> struct device_node *node = dev->of_node;
> @@ -831,7 +833,8 @@ static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
> }
>
> port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events,
> - &mc_event_domain_ops, port);
> + ops, port);
> +
> if (!port->event_domain) {
> dev_err(dev, "failed to get event domain\n");
> of_node_put(pcie_intc_node);
> @@ -930,7 +933,7 @@ static int plda_init_interrupts(struct platform_device *pdev,
> return -EINVAL;
> }
>
> - ret = plda_pcie_init_irq_domains(port);
> + ret = plda_pcie_init_irq_domains(port, event->domain_ops);
> if (ret) {
> dev_err(dev, "failed creating IRQ domains\n");
> return ret;
> diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
> index 6571a4befac9..080932cbe8c4 100644
> --- a/drivers/pci/controller/plda/pcie-plda.h
> +++ b/drivers/pci/controller/plda/pcie-plda.h
> @@ -129,6 +129,7 @@ struct plda_pcie_rp {
> };
>
> struct plda_event {
> + const struct irq_domain_ops *domain_ops;
> const struct plda_event_ops *event_ops;
> int (*request_event_irq)(struct plda_pcie_rp *pcie,
> int event_irq, int event);
> --
> 2.17.1
>
On Wed, Oct 11, 2023 at 07:05:07PM +0800, Minda Chen wrote:
> For different interrupts to event num mapping function,
> add get_events() function pointer.
> For extenting event ops in the fucture, Add struct
> plda_event_ops data structure.
I still think these commit messages are a bit weak and should point out
the reasons why these are needed, rather than handwaving about future
users.
Otherwise,
Acked-by: Conor Dooley <[email protected]>
Thanks,
Conor.
>
> plda_handle_events() will call the get_events() callback
> function pointer directly. For the robustness of codes,
> add checking in plda_init_interrupts().
>
> Signed-off-by: Minda Chen <[email protected]>
> ---
> drivers/pci/controller/plda/pcie-microchip-host.c | 14 +++++++++++++-
> drivers/pci/controller/plda/pcie-plda.h | 8 ++++++++
> 2 files changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
> index e99498b5b563..fca1520d56c9 100644
> --- a/drivers/pci/controller/plda/pcie-microchip-host.c
> +++ b/drivers/pci/controller/plda/pcie-microchip-host.c
> @@ -647,7 +647,7 @@ static void plda_handle_event(struct irq_desc *desc)
>
> chained_irq_enter(chip, desc);
>
> - events = mc_get_events(port);
> + events = port->event_ops->get_events(port);
>
> for_each_set_bit(bit, &events, port->num_events)
> generic_handle_domain_irq(port->event_domain, bit);
> @@ -806,7 +806,12 @@ static int mc_request_event_irq(struct plda_pcie_rp *plda, int event_irq,
> 0, event_cause[event].sym, plda);
> }
>
> +static const struct plda_event_ops mc_event_ops = {
> + .get_events = mc_get_events,
> +};
> +
> static const struct plda_event mc_event = {
> + .event_ops = &mc_event_ops,
> .request_event_irq = mc_request_event_irq,
> .intx_event = EVENT_LOCAL_PM_MSI_INT_INTX,
> .msi_event = EVENT_LOCAL_PM_MSI_INT_MSI,
> @@ -920,6 +925,11 @@ static int plda_init_interrupts(struct platform_device *pdev,
> int i, intx_irq, msi_irq, event_irq;
> int ret;
>
> + if (!event->event_ops || !event->event_ops->get_events) {
> + dev_err(dev, "no get events ops\n");
> + return -EINVAL;
> + }
> +
> ret = plda_pcie_init_irq_domains(port);
> if (ret) {
> dev_err(dev, "failed creating IRQ domains\n");
> @@ -930,6 +940,8 @@ static int plda_init_interrupts(struct platform_device *pdev,
> if (irq < 0)
> return -ENODEV;
>
> + port->event_ops = event->event_ops;
> +
> for (i = 0; i < port->num_events; i++) {
> event_irq = irq_create_mapping(port->event_domain, i);
> if (!event_irq) {
> diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
> index 5ad1b81c0086..6571a4befac9 100644
> --- a/drivers/pci/controller/plda/pcie-plda.h
> +++ b/drivers/pci/controller/plda/pcie-plda.h
> @@ -102,6 +102,12 @@
> #define EVENT_PM_MSI_INT_SYS_ERR 12
> #define NUM_PLDA_EVENTS 13
>
> +struct plda_pcie_rp;
> +
> +struct plda_event_ops {
> + u32 (*get_events)(struct plda_pcie_rp *pcie);
> +};
> +
> struct plda_msi {
> struct mutex lock; /* Protect used bitmap */
> struct irq_domain *msi_domain;
> @@ -117,11 +123,13 @@ struct plda_pcie_rp {
> struct irq_domain *event_domain;
> raw_spinlock_t lock;
> struct plda_msi msi;
> + const struct plda_event_ops *event_ops;
> void __iomem *bridge_addr;
> int num_events;
> };
>
> struct plda_event {
> + const struct plda_event_ops *event_ops;
> int (*request_event_irq)(struct plda_pcie_rp *pcie,
> int event_irq, int event);
> int intx_event;
> --
> 2.17.1
>
On 2023/10/18 19:30, Conor Dooley wrote:
> On Wed, Oct 11, 2023 at 07:05:08PM +0800, Minda Chen wrote:
>> PolarFire Implements none-PLDA event interrupts. So the whole event
>> domain ops can not be re-used.
>
> IIRC, the reason things are like this is to work around the lack of an
> msi controller and are not as a result of changes made to the PLDA IP
> by us.
>
Oh. For this reason that new added interrupts have to add to
global events field, not the MSI. I will add this to commit messages.
Thanks
>> PLDA event domain ops instances will be implemented
>> in later patch.
>
> Acked-by: Conor Dooley <[email protected]>
>
> Thanks,
> Conor.
>
>>
>> Signed-off-by: Minda Chen <[email protected]>
>> ---
>> drivers/pci/controller/plda/pcie-microchip-host.c | 9 ++++++---
>> drivers/pci/controller/plda/pcie-plda.h | 1 +
>> 2 files changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
>> index fca1520d56c9..2825c1f5563d 100644
>> --- a/drivers/pci/controller/plda/pcie-microchip-host.c
>> +++ b/drivers/pci/controller/plda/pcie-microchip-host.c
>> @@ -811,13 +811,15 @@ static const struct plda_event_ops mc_event_ops = {
>> };
>>
>> static const struct plda_event mc_event = {
>> + .domain_ops = &mc_event_domain_ops,
>> .event_ops = &mc_event_ops,
>> .request_event_irq = mc_request_event_irq,
>> .intx_event = EVENT_LOCAL_PM_MSI_INT_INTX,
>> .msi_event = EVENT_LOCAL_PM_MSI_INT_MSI,
>> };
>>
>> -static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
>> +static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port,
>> + const struct irq_domain_ops *ops)
>> {
>> struct device *dev = port->dev;
>> struct device_node *node = dev->of_node;
>> @@ -831,7 +833,8 @@ static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
>> }
>>
>> port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events,
>> - &mc_event_domain_ops, port);
>> + ops, port);
>> +
>> if (!port->event_domain) {
>> dev_err(dev, "failed to get event domain\n");
>> of_node_put(pcie_intc_node);
>> @@ -930,7 +933,7 @@ static int plda_init_interrupts(struct platform_device *pdev,
>> return -EINVAL;
>> }
>>
>> - ret = plda_pcie_init_irq_domains(port);
>> + ret = plda_pcie_init_irq_domains(port, event->domain_ops);
>> if (ret) {
>> dev_err(dev, "failed creating IRQ domains\n");
>> return ret;
>> diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
>> index 6571a4befac9..080932cbe8c4 100644
>> --- a/drivers/pci/controller/plda/pcie-plda.h
>> +++ b/drivers/pci/controller/plda/pcie-plda.h
>> @@ -129,6 +129,7 @@ struct plda_pcie_rp {
>> };
>>
>> struct plda_event {
>> + const struct irq_domain_ops *domain_ops;
>> const struct plda_event_ops *event_ops;
>> int (*request_event_irq)(struct plda_pcie_rp *pcie,
>> int event_irq, int event);
>> --
>> 2.17.1
>>