| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20231214072839.2367-18-minda.chen@starfivetech.com>
Date: Thu, 14 Dec 2023 15:28:35 +0800
From: Minda Chen <minda.chen@...rfivetech.com>
To: Conor Dooley <conor@...nel.org>,
Krzysztof Wilczyński <kw@...ux.com>,
Rob Herring <robh+dt@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Lorenzo Pieralisi <lpieralisi@...nel.org>,
"Daire McNamara" <daire.mcnamara@...rochip.com>,
Emil Renner Berthing <emil.renner.berthing@...onical.com>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-riscv@...ts.infradead.org>, <linux-pci@...r.kernel.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Philipp Zabel <p.zabel@...gutronix.de>,
Mason Huo <mason.huo@...rfivetech.com>,
Leyfoon Tan <leyfoon.tan@...rfivetech.com>,
Kevin Xie <kevin.xie@...rfivetech.com>,
Minda Chen <minda.chen@...rfivetech.com>
Subject: [PATCH v13 17/21] PCI: plda: Add host init/deinit and map bus functions
Add PLDA host plda_pcie_host_init()/plda_pcie_host_deinit() and map bus
function. So vendor can use it to init PLDA PCIe host core.
Add struct plda_event instance to init PCIe interrupt.
Signed-off-by: Minda Chen <minda.chen@...rfivetech.com>
Reviewed-by: Mason Huo <mason.huo@...rfivetech.com>
---
drivers/pci/controller/plda/pcie-plda-host.c | 134 +++++++++++++++++--
drivers/pci/controller/plda/pcie-plda.h | 21 +++
2 files changed, 142 insertions(+), 13 deletions(-)
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
index 3cba58a37093..53a9bef353a3 100644
--- a/drivers/pci/controller/plda/pcie-plda-host.c
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -3,6 +3,7 @@
* PLDA PCIe XpressRich host controller driver
*
* Copyright (C) 2023 Microchip Co. Ltd
+ * StarFive Co. Ltd
*
* Author: Daire McNamara <daire.mcnamara@...rochip.com>
*/
@@ -18,6 +19,15 @@
#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);
@@ -375,6 +385,11 @@ static const struct irq_domain_ops plda_event_domain_ops = {
.map = plda_pcie_event_map,
};
+static const struct plda_event plda_default_event = {
+ .intx_event = EVENT_PM_MSI_INT_INTX,
+ .msi_event = EVENT_PM_MSI_INT_MSI
+};
+
static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
{
struct device *dev = port->dev;
@@ -421,8 +436,7 @@ 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;
if (!port->event_ops)
@@ -437,8 +451,8 @@ 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;
for (i = 0; i < port->num_events; i++) {
@@ -461,26 +475,26 @@ 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;
}
@@ -546,3 +560,97 @@ 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");
+
+ 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 fecef389d6cc..fd2e464552a9 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -136,6 +136,11 @@ 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;
@@ -147,13 +152,19 @@ 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 irq_chip *event_irq_chip;
+ const struct plda_pcie_host_ops *host_ops;
void __iomem *bridge_addr;
+ void __iomem *config_base;
+ int irq;
+ int msi_irq;
+ int intx_irq;
int num_events;
};
@@ -164,6 +175,8 @@ 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);
@@ -172,4 +185,12 @@ 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);
+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;
+}
#endif
--
2.17.1
Powered by blists - more mailing lists