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-rw-r--r--arch/powerpc/include/asm/pci-bridge.h2
-rw-r--r--arch/powerpc/platforms/pseries/msi.c21
2 files changed, 20 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index ffbc5fd549ac..0694f73db22d 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -163,6 +163,8 @@ struct pci_dn {
int pci_ext_config_space; /* for pci devices */
+ int force_32bit_msi:1;
+
struct pci_dev *pcidev; /* back-pointer to the pci device */
#ifdef CONFIG_EEH
struct eeh_dev *edev; /* eeh device */
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index e5b084723131..420524e6f8c9 100644
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -24,6 +24,7 @@ static int query_token, change_token;
#define RTAS_RESET_FN 2
#define RTAS_CHANGE_MSI_FN 3
#define RTAS_CHANGE_MSIX_FN 4
+#define RTAS_CHANGE_32MSI_FN 5
static struct pci_dn *get_pdn(struct pci_dev *pdev)
{
@@ -58,7 +59,8 @@ static int rtas_change_msi(struct pci_dn *pdn, u32 func, u32 num_irqs)
seq_num = 1;
do {
- if (func == RTAS_CHANGE_MSI_FN || func == RTAS_CHANGE_MSIX_FN)
+ if (func == RTAS_CHANGE_MSI_FN || func == RTAS_CHANGE_MSIX_FN ||
+ func == RTAS_CHANGE_32MSI_FN)
rc = rtas_call(change_token, 6, 4, rtas_ret, addr,
BUID_HI(buid), BUID_LO(buid),
func, num_irqs, seq_num);
@@ -426,9 +428,12 @@ static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type)
*/
again:
if (type == PCI_CAP_ID_MSI) {
- rc = rtas_change_msi(pdn, RTAS_CHANGE_MSI_FN, nvec);
+ if (pdn->force_32bit_msi)
+ rc = rtas_change_msi(pdn, RTAS_CHANGE_32MSI_FN, nvec);
+ else
+ rc = rtas_change_msi(pdn, RTAS_CHANGE_MSI_FN, nvec);
- if (rc < 0) {
+ if (rc < 0 && !pdn->force_32bit_msi) {
pr_debug("rtas_msi: trying the old firmware call.\n");
rc = rtas_change_msi(pdn, RTAS_CHANGE_FN, nvec);
}
@@ -512,3 +517,13 @@ static int rtas_msi_init(void)
return 0;
}
arch_initcall(rtas_msi_init);
+
+static void quirk_radeon(struct pci_dev *dev)
+{
+ struct pci_dn *pdn = get_pdn(dev);
+
+ if (pdn)
+ pdn->force_32bit_msi = 1;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x68f2, quirk_radeon);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0xaa68, quirk_radeon);