[IA64] more robust zx1/sx1000 machvec support

[karo-tx-linux.git] / arch / ia64 / hp / common / hwsw_iommu.c

diff --git a/arch/ia64/hp/common/hwsw_iommu.c b/arch/ia64/hp/common/hwsw_iommu.c
index 80f8ef013939f4bc5c55686a97fa013c3e8ad3e8..317c334c5a18d7f7517dd8242305b3feaf210cb5 100644 (file)
--- a/arch/ia64/hp/common/hwsw_iommu.c
+++ b/arch/ia64/hp/common/hwsw_iommu.c
@@ -17,7 +17,7 @@
 #include <asm/machvec.h>
 
 /* swiotlb declarations & definitions: */
-extern void swiotlb_init_with_default_size (size_t size);
+extern int swiotlb_late_init_with_default_size (size_t size);
 extern ia64_mv_dma_alloc_coherent      swiotlb_alloc_coherent;
 extern ia64_mv_dma_free_coherent       swiotlb_free_coherent;
 extern ia64_mv_dma_map_single          swiotlb_map_single;
@@ -67,7 +67,16 @@ void
 hwsw_init (void)
 {
        /* default to a smallish 2MB sw I/O TLB */
-       swiotlb_init_with_default_size (2 * (1<<20));
+       if (swiotlb_late_init_with_default_size (2 * (1<<20)) != 0) {
+#ifdef CONFIG_IA64_GENERIC
+               /* Better to have normal DMA than panic */
+               printk(KERN_WARNING "%s: Failed to initialize software I/O TLB,"
+                      " reverting to hpzx1 platform vector\n", __FUNCTION__);
+               machvec_init("hpzx1");
+#else
+               panic("Unable to initialize software I/O TLB services");
+#endif
+       }
 }
 
 void *