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authorJake Moilanen <moilanen@austin.ibm.com>2006-06-07 16:15:10 -0500
committerPaul Mackerras <paulus@samba.org>2006-06-15 19:31:25 +1000
commit204face4fb3ba2ca09a4073e7debc595e14c2388 (patch)
treec98c1b576d249b392669a0d534598718af40478d
parentbb53bb3dcb12d79efdee3d82bff46a204af377f3 (diff)
downloadop-kernel-dev-204face4fb3ba2ca09a4073e7debc595e14c2388.zip
op-kernel-dev-204face4fb3ba2ca09a4073e7debc595e14c2388.tar.gz
[POWERPC] MSI abstraction
Instead of trying to make PPC64 MSI fit in a Intel-centric MSI layer, a simple short-term solution is to hook the pci_{en/dis}able_msi() calls and make a machdep call. The rest of the MSI functions are superfluous for what is needed at this time. Many of which can have machdep calls added as needed. Ben and Michael Ellerman are looking into rewrite the MSI layer to be more generic. However, in the meantime this works as a interim solution. Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--arch/powerpc/kernel/irq.c25
-rw-r--r--include/asm-powerpc/machdep.h5
2 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 57d560c..bfcec4c 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -47,6 +47,7 @@
#include <linux/cpumask.h>
#include <linux/profile.h>
#include <linux/bitops.h>
+#include <linux/pci.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -436,6 +437,30 @@ void do_softirq(void)
}
EXPORT_SYMBOL(do_softirq);
+#ifdef CONFIG_PCI_MSI
+int pci_enable_msi(struct pci_dev * pdev)
+{
+ if (ppc_md.enable_msi)
+ return ppc_md.enable_msi(pdev);
+ else
+ return -1;
+}
+
+void pci_disable_msi(struct pci_dev * pdev)
+{
+ if (ppc_md.disable_msi)
+ ppc_md.disable_msi(pdev);
+}
+
+void pci_scan_msi_device(struct pci_dev *dev) {}
+int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec) {return -1;}
+void pci_disable_msix(struct pci_dev *dev) {}
+void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
+void disable_msi_mode(struct pci_dev *dev, int pos, int type) {}
+void pci_no_msi(void) {}
+
+#endif
+
#ifdef CONFIG_PPC64
static int __init setup_noirqdistrib(char *str)
{
diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h
index 0f9254c..fc984bd 100644
--- a/include/asm-powerpc/machdep.h
+++ b/include/asm-powerpc/machdep.h
@@ -238,6 +238,11 @@ struct machdep_calls {
*/
void (*machine_kexec)(struct kimage *image);
#endif /* CONFIG_KEXEC */
+
+#ifdef CONFIG_PCI_MSI
+ int (*enable_msi)(struct pci_dev *pdev);
+ void (*disable_msi)(struct pci_dev *pdev);
+#endif /* CONFIG_PCI_MSI */
};
extern void power4_idle(void);
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