This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / pci / msi-apic.c

diff --git a/drivers/pci/msi-apic.c b/drivers/pci/msi-apic.c
new file mode 100644 (file)
index 0000000..5ed798b
--- /dev/null
+++ b/drivers/pci/msi-apic.c
@@ -0,0 +1,101 @@
+/*
+ * MSI hooks for standard x86 apic
+ */
+
+#include <linux/pci.h>
+#include <linux/irq.h>
+#include <asm/smp.h>
+
+#include "msi.h"
+
+/*
+ * Shifts for APIC-based data
+ */
+
+#define MSI_DATA_VECTOR_SHIFT          0
+#define            MSI_DATA_VECTOR(v)          (((u8)v) << MSI_DATA_VECTOR_SHIFT)
+
+#define MSI_DATA_DELIVERY_SHIFT                8
+#define     MSI_DATA_DELIVERY_FIXED    (0 << MSI_DATA_DELIVERY_SHIFT)
+#define     MSI_DATA_DELIVERY_LOWPRI   (1 << MSI_DATA_DELIVERY_SHIFT)
+
+#define MSI_DATA_LEVEL_SHIFT           14
+#define     MSI_DATA_LEVEL_DEASSERT    (0 << MSI_DATA_LEVEL_SHIFT)
+#define     MSI_DATA_LEVEL_ASSERT      (1 << MSI_DATA_LEVEL_SHIFT)
+
+#define MSI_DATA_TRIGGER_SHIFT         15
+#define     MSI_DATA_TRIGGER_EDGE      (0 << MSI_DATA_TRIGGER_SHIFT)
+#define     MSI_DATA_TRIGGER_LEVEL     (1 << MSI_DATA_TRIGGER_SHIFT)
+
+/*
+ * Shift/mask fields for APIC-based bus address
+ */
+
+#define MSI_ADDR_HEADER                        0xfee00000
+
+#define MSI_ADDR_DESTID_MASK           0xfff0000f
+#define     MSI_ADDR_DESTID_CPU(cpu)   ((cpu) << MSI_TARGET_CPU_SHIFT)
+
+#define MSI_ADDR_DESTMODE_SHIFT                2
+#define     MSI_ADDR_DESTMODE_PHYS     (0 << MSI_ADDR_DESTMODE_SHIFT)
+#define            MSI_ADDR_DESTMODE_LOGIC     (1 << MSI_ADDR_DESTMODE_SHIFT)
+
+#define MSI_ADDR_REDIRECTION_SHIFT     3
+#define     MSI_ADDR_REDIRECTION_CPU   (0 << MSI_ADDR_REDIRECTION_SHIFT)
+#define     MSI_ADDR_REDIRECTION_LOWPRI        (1 << MSI_ADDR_REDIRECTION_SHIFT)
+
+
+static void
+msi_target_apic(unsigned int vector,
+               unsigned int dest_cpu,
+               u32 *address_hi,        /* in/out */
+               u32 *address_lo)        /* in/out */
+{
+       u32 addr = *address_lo;
+
+       addr &= MSI_ADDR_DESTID_MASK;
+       addr |= MSI_ADDR_DESTID_CPU(cpu_physical_id(dest_cpu));
+
+       *address_lo = addr;
+}
+
+static int
+msi_setup_apic(struct pci_dev *pdev,   /* unused in generic */
+               unsigned int vector,
+               u32 *address_hi,
+               u32 *address_lo,
+               u32 *data)
+{
+       unsigned long   dest_phys_id;
+
+       dest_phys_id = cpu_physical_id(first_cpu(cpu_online_map));
+
+       *address_hi = 0;
+       *address_lo =   MSI_ADDR_HEADER |
+                       MSI_ADDR_DESTMODE_PHYS |
+                       MSI_ADDR_REDIRECTION_CPU |
+                       MSI_ADDR_DESTID_CPU(dest_phys_id);
+
+       *data = MSI_DATA_TRIGGER_EDGE |
+               MSI_DATA_LEVEL_ASSERT |
+               MSI_DATA_DELIVERY_FIXED |
+               MSI_DATA_VECTOR(vector);
+
+       return 0;
+}
+
+static void
+msi_teardown_apic(unsigned int vector)
+{
+       return;         /* no-op */
+}
+
+/*
+ * Generic ops used on most IA archs/platforms.  Set with msi_register()
+ */
+
+struct msi_ops msi_apic_ops = {
+       .setup = msi_setup_apic,
+       .teardown = msi_teardown_apic,
+       .target = msi_target_apic,
+};