diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0073-of-pci-add-registry-of-MSI-chips.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0073-of-pci-add-registry-of-MSI-chips.patch | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-3.10/0073-of-pci-add-registry-of-MSI-chips.patch b/target/linux/mvebu/patches-3.10/0073-of-pci-add-registry-of-MSI-chips.patch new file mode 100644 index 0000000000..641b8d1701 --- /dev/null +++ b/target/linux/mvebu/patches-3.10/0073-of-pci-add-registry-of-MSI-chips.patch @@ -0,0 +1,106 @@ +From a05852e828063b6731fcac543b87367c137c16f8 Mon Sep 17 00:00:00 2001 +From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Date: Thu, 6 Jun 2013 18:21:18 +0200 +Subject: [PATCH 073/203] of: pci: add registry of MSI chips + +This commit adds a very basic registry of msi_chip structures, so that +an IRQ controller driver can register an msi_chip, and a PCIe host +controller can find it, based on a 'struct device_node'. + +Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> +Acked-by: Rob Herring <rob.herring@calxeda.com> +--- + drivers/of/of_pci.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ + include/linux/msi.h | 2 ++ + include/linux/of_pci.h | 12 ++++++++++++ + 3 files changed, 59 insertions(+) + +--- a/drivers/of/of_pci.c ++++ b/drivers/of/of_pci.c +@@ -89,3 +89,48 @@ int of_pci_parse_bus_range(struct device + return 0; + } + EXPORT_SYMBOL_GPL(of_pci_parse_bus_range); ++ ++#ifdef CONFIG_PCI_MSI ++ ++static LIST_HEAD(of_pci_msi_chip_list); ++static DEFINE_MUTEX(of_pci_msi_chip_mutex); ++ ++int of_pci_msi_chip_add(struct msi_chip *chip) ++{ ++ if (!of_property_read_bool(chip->of_node, "msi-controller")) ++ return -EINVAL; ++ ++ mutex_lock(&of_pci_msi_chip_mutex); ++ list_add(&chip->list, &of_pci_msi_chip_list); ++ mutex_unlock(&of_pci_msi_chip_mutex); ++ ++ return 0; ++} ++EXPORT_SYMBOL_GPL(of_pci_msi_chip_add); ++ ++void of_pci_msi_chip_remove(struct msi_chip *chip) ++{ ++ mutex_lock(&of_pci_msi_chip_mutex); ++ list_del(&chip->list); ++ mutex_unlock(&of_pci_msi_chip_mutex); ++} ++EXPORT_SYMBOL_GPL(of_pci_msi_chip_remove); ++ ++struct msi_chip *of_pci_find_msi_chip_by_node(struct device_node *of_node) ++{ ++ struct msi_chip *c; ++ ++ mutex_lock(&of_pci_msi_chip_mutex); ++ list_for_each_entry(c, &of_pci_msi_chip_list, list) { ++ if (c->of_node == of_node) { ++ mutex_unlock(&of_pci_msi_chip_mutex); ++ return c; ++ } ++ } ++ mutex_unlock(&of_pci_msi_chip_mutex); ++ ++ return NULL; ++} ++EXPORT_SYMBOL_GPL(of_pci_find_msi_chip_by_node); ++ ++#endif /* CONFIG_PCI_MSI */ +--- a/include/linux/msi.h ++++ b/include/linux/msi.h +@@ -67,6 +67,8 @@ void default_restore_msi_irqs(struct pci + struct msi_chip { + struct module *owner; + struct device *dev; ++ struct device_node *of_node; ++ struct list_head list; + + int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev, + struct msi_desc *desc); +--- a/include/linux/of_pci.h ++++ b/include/linux/of_pci.h +@@ -2,6 +2,7 @@ + #define __OF_PCI_H + + #include <linux/pci.h> ++#include <linux/msi.h> + + struct pci_dev; + struct of_irq; +@@ -13,4 +14,15 @@ struct device_node *of_pci_find_child_de + int of_pci_get_devfn(struct device_node *np); + int of_pci_parse_bus_range(struct device_node *node, struct resource *res); + ++#if defined(CONFIG_OF) && defined(CONFIG_PCI_MSI) ++int of_pci_msi_chip_add(struct msi_chip *chip); ++void of_pci_msi_chip_remove(struct msi_chip *chip); ++struct msi_chip *of_pci_find_msi_chip_by_node(struct device_node *of_node); ++#else ++static inline int of_pci_msi_chip_add(struct msi_chip *chip) { return -EINVAL; } ++static inline void of_pci_msi_chip_remove(struct msi_chip *chip) { } ++static inline struct msi_chip * ++of_pci_find_msi_chip_by_node(struct device_node *of_node) { return NULL; } ++#endif ++ + #endif |