genirq: Provide default callbacks for msi_domain_ops

Extend struct msi_domain_info and provide default callbacks for
msi_domain_ops.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Alexander Gordeev <agordeev@redhat.com>
Link: http://lkml.kernel.org/r/1416061447-9472-8-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 37 insertions, 5 deletions

diff --git a/include/linux/msi.h b/include/linux/msi.h
index 7a93a988dce8..0098e2c8fd42 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -116,6 +116,7 @@ struct msi_controller {
 
 #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
 
+#include <linux/irqhandler.h>
 #include <asm/msi.h>
 
 struct irq_domain;
@@ -142,11 +143,12 @@ struct msi_domain_info;
  * interfaces which are based on msi_desc.
  */
 struct msi_domain_ops {
-        irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info, void *arg);
+        irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info,
+                                     msi_alloc_info_t *arg);
         int             (*msi_init)(struct irq_domain *domain,
                                     struct msi_domain_info *info,
                                     unsigned int virq, irq_hw_number_t hwirq,
-                                    void *arg);
+                                    msi_alloc_info_t *arg);
         void            (*msi_free)(struct irq_domain *domain,
                                     struct msi_domain_info *info,
                                     unsigned int virq);
@@ -165,16 +167,46 @@ struct msi_domain_ops {
 
 /**
  * struct msi_domain_info - MSI interrupt domain data
- * @ops:        The callback data structure
- * @chip:       The associated interrupt chip
- * @data:       Domain specific data
+ * @flags:              Flags to decribe features and capabilities
+ * @ops:                The callback data structure
+ * @chip:               Optional: associated interrupt chip
+ * @chip_data:          Optional: associated interrupt chip data
+ * @handler:            Optional: associated interrupt flow handler
+ * @handler_data:       Optional: associated interrupt flow handler data
+ * @handler_name:       Optional: associated interrupt flow handler name
+ * @data:               Optional: domain specific data
  */
 struct msi_domain_info {
+        u32                     flags;
         struct msi_domain_ops   *ops;
         struct irq_chip         *chip;
+        void                    *chip_data;
+        irq_flow_handler_t      handler;
+        void                    *handler_data;
+        const char              *handler_name;
         void                    *data;
 };
 
+/* Flags for msi_domain_info */
+enum {
+        /*
+         * Init non implemented ops callbacks with default MSI domain
+         * callbacks.
+         */
+        MSI_FLAG_USE_DEF_DOM_OPS        = (1 << 0),
+        /*
+         * Init non implemented chip callbacks with default MSI chip
+         * callbacks.
+         */
+        MSI_FLAG_USE_DEF_CHIP_OPS       = (1 << 1),
+        /* Build identity map between hwirq and irq */
+        MSI_FLAG_IDENTITY_MAP           = (1 << 2),
+        /* Support multiple PCI MSI interrupts */
+        MSI_FLAG_MULTI_PCI_MSI          = (1 << 3),
+        /* Support PCI MSIX interrupts */
+        MSI_FLAG_PCI_MSIX               = (1 << 4),
+};
+
 int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
                             bool force);