---

yaml --- r: 38424 b: refs/heads/master c: 589e367 h: refs/heads/master v: v3
git-mirror · Oct 4, 2006 · ac66b65 · ac66b65
1 parent 40931c0
commit ac66b65
Show file tree

Hide file tree

Showing 4 changed files with 124 additions and 6 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1ce03373a7f4b5fa8ca5be02ff35229800a6e12b
+refs/heads/master: 589e367f9b9117b3412da0d4e10ea6882db8da84
diff --git a/trunk/arch/x86_64/kernel/io_apic.c b/trunk/arch/x86_64/kernel/io_apic.c
@@ -26,6 +26,7 @@
 #include <linux/delay.h>
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
+#include <linux/pci.h>
 #include <linux/mc146818rtc.h>
 #include <linux/acpi.h>
 #include <linux/sysdev.h>
@@ -41,6 +42,7 @@
 #include <asm/acpi.h>
 #include <asm/dma.h>
 #include <asm/nmi.h>
+#include <asm/msidef.h>
 
 #define __apicdebuginit  __init
 
@@ -1739,6 +1741,78 @@ void destroy_irq(unsigned int irq)
 }
 #endif
 
+/*
+ * MSI mesage composition
+ */
+#ifdef CONFIG_PCI_MSI
+static int msi_msg_setup(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
+{
+	/* For now always this code always uses physical delivery
+	 * mode.
+	 */
+	int vector;
+	unsigned dest;
+
+	vector = assign_irq_vector(irq);
+	if (vector >= 0) {
+		cpumask_t tmp;
+
+		cpus_clear(tmp);
+		cpu_set(first_cpu(cpu_online_map), tmp);
+		dest = cpu_mask_to_apicid(tmp);
+
+		msg->address_hi = MSI_ADDR_BASE_HI;
+		msg->address_lo =
+			MSI_ADDR_BASE_LO |
+			((INT_DEST_MODE == 0) ?
+				MSI_ADDR_DEST_MODE_PHYSICAL:
+				MSI_ADDR_DEST_MODE_LOGICAL) |
+			((INT_DELIVERY_MODE != dest_LowestPrio) ?
+				MSI_ADDR_REDIRECTION_CPU:
+				MSI_ADDR_REDIRECTION_LOWPRI) |
+			MSI_ADDR_DEST_ID(dest);
+
+		msg->data =
+			MSI_DATA_TRIGGER_EDGE |
+			MSI_DATA_LEVEL_ASSERT |
+			((INT_DELIVERY_MODE != dest_LowestPrio) ?
+				MSI_DATA_DELIVERY_FIXED:
+				MSI_DATA_DELIVERY_LOWPRI) |
+			MSI_DATA_VECTOR(vector);
+	}
+	return vector;
+}
+
+static void msi_msg_teardown(unsigned int irq)
+{
+	return;
+}
+
+static void msi_msg_set_affinity(unsigned int irq, cpumask_t mask, struct msi_msg *msg)
+{
+	int vector;
+	unsigned dest;
+
+	vector = assign_irq_vector(irq);
+	if (vector > 0) {
+		dest = cpu_mask_to_apicid(mask);
+
+		msg->data &= ~MSI_DATA_VECTOR_MASK;
+		msg->data |= MSI_DATA_VECTOR(vector);
+		msg->address_lo &= ~MSI_ADDR_DEST_ID_MASK;
+		msg->address_lo |= MSI_ADDR_DEST_ID(dest);
+	}
+}
+
+struct msi_ops arch_msi_ops = {
+	.needs_64bit_address = 0,
+	.setup = msi_msg_setup,
+	.teardown = msi_msg_teardown,
+	.target = msi_msg_set_affinity,
+};
+
+#endif
+
 /* --------------------------------------------------------------------------
                           ACPI-based IOAPIC Configuration
    -------------------------------------------------------------------------- */

diff --git a/trunk/include/asm-x86_64/msi.h b/trunk/include/asm-x86_64/msi.h
@@ -10,14 +10,11 @@
 #include <asm/mach_apic.h>
 #include <asm/smp.h>
 
-#define LAST_DEVICE_VECTOR	(FIRST_SYSTEM_VECTOR - 1)
-#define MSI_TARGET_CPU_SHIFT	12
-
-extern struct msi_ops msi_apic_ops;
+extern struct msi_ops arch_msi_ops;
 
 static inline int msi_arch_init(void)
 {
-	msi_register(&msi_apic_ops);
+	msi_register(&arch_msi_ops);
 	return 0;
 }
 

diff --git a/trunk/include/asm-x86_64/msidef.h b/trunk/include/asm-x86_64/msidef.h
@@ -0,0 +1,47 @@
+#ifndef ASM_MSIDEF_H
+#define ASM_MSIDEF_H
+
+/*
+ * Constants for Intel APIC based MSI messages.
+ */
+
+/*
+ * Shifts for MSI data
+ */
+
+#define MSI_DATA_VECTOR_SHIFT		0
+#define  MSI_DATA_VECTOR_MASK		0x000000ff
+#define	 MSI_DATA_VECTOR(v)		(((v) << MSI_DATA_VECTOR_SHIFT) & MSI_DATA_VECTOR_MASK)
+
+#define MSI_DATA_DELIVERY_MODE_SHIFT	8
+#define  MSI_DATA_DELIVERY_FIXED	(0 << MSI_DATA_DELIVERY_MODE_SHIFT)
+#define  MSI_DATA_DELIVERY_LOWPRI	(1 << MSI_DATA_DELIVERY_MODE_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 msi address
+ */
+
+#define MSI_ADDR_BASE_HI		0
+#define MSI_ADDR_BASE_LO		0xfee00000
+
+#define MSI_ADDR_DEST_MODE_SHIFT	2
+#define  MSI_ADDR_DEST_MODE_PHYSICAL	(0 << MSI_ADDR_DEST_MODE_SHIFT)
+#define	 MSI_ADDR_DEST_MODE_LOGICAL	(1 << MSI_ADDR_DEST_MODE_SHIFT)
+
+#define MSI_ADDR_REDIRECTION_SHIFT	3
+#define  MSI_ADDR_REDIRECTION_CPU	(0 << MSI_ADDR_REDIRECTION_SHIFT) /* dedicated cpu */
+#define  MSI_ADDR_REDIRECTION_LOWPRI	(1 << MSI_ADDR_REDIRECTION_SHIFT) /* lowest priority */
+
+#define MSI_ADDR_DEST_ID_SHIFT		12
+#define	 MSI_ADDR_DEST_ID_MASK		0x00ffff0
+#define  MSI_ADDR_DEST_ID(dest)		(((dest) << MSI_ADDR_DEST_ID_SHIFT) & MSI_ADDR_DEST_ID_MASK)
+
+#endif /* ASM_MSIDEF_H */