3 files changed, 51 insertions, 20 deletions

diff --git a/arch/ia64/hp/common/hwsw_iommu.c b/arch/ia64/hp/common/hwsw_iommu.c
index 1ba02baf2f9..a5a5637507b 100644
--- 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 *
diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c
index 21bffba78b6..bdccd0b1eb6 100644
--- a/arch/ia64/hp/common/sba_iommu.c
+++ b/arch/ia64/hp/common/sba_iommu.c
@@ -2028,9 +2028,40 @@ static struct acpi_driver acpi_sba_ioc_driver = {
 static int __init
 sba_init(void)
 {
+	if (!ia64_platform_is("hpzx1") && !ia64_platform_is("hpzx1_swiotlb"))
+		return 0;
+
 	acpi_bus_register_driver(&acpi_sba_ioc_driver);
-	if (!ioc_list)
+	if (!ioc_list) {
+#ifdef CONFIG_IA64_GENERIC
+		extern int swiotlb_late_init_with_default_size (size_t size);
+
+		/*
+		 * If we didn't find something sba_iommu can claim, we
+		 * need to setup the swiotlb and switch to the dig machvec.
+		 */
+		if (swiotlb_late_init_with_default_size(64 * (1<<20)) != 0)
+			panic("Unable to find SBA IOMMU or initialize "
+			      "software I/O TLB: Try machvec=dig boot option");
+		machvec_init("dig");
+#else
+		panic("Unable to find SBA IOMMU: Try a generic or DIG kernel");
+#endif
 		return 0;
+	}
+
+#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_HP_ZX1_SWIOTLB)
+	/*
+	 * hpzx1_swiotlb needs to have a fairly small swiotlb bounce
+	 * buffer setup to support devices with smaller DMA masks than
+	 * sba_iommu can handle.
+	 */
+	if (ia64_platform_is("hpzx1_swiotlb")) {
+		extern void hwsw_init(void);
+
+		hwsw_init();
+	}
+#endif
 
 #ifdef CONFIG_PCI
 	{
@@ -2048,18 +2079,6 @@ sba_init(void)
 
 subsys_initcall(sba_init); /* must be initialized after ACPI etc., but before any drivers... */
 
-extern void dig_setup(char**);
-/*
- * MAX_DMA_ADDRESS needs to be setup prior to paging_init to do any good,
- * so we use the platform_setup hook to fix it up.
- */
-void __init
-sba_setup(char **cmdline_p)
-{
-	MAX_DMA_ADDRESS = ~0UL;
-	dig_setup(cmdline_p);
-}
-
 static int __init
 nosbagart(char *str)
 {
diff --git a/arch/ia64/hp/sim/simscsi.c b/arch/ia64/hp/sim/simscsi.c
index a18983a3c93..a3fe9753113 100644
--- a/arch/ia64/hp/sim/simscsi.c
+++ b/arch/ia64/hp/sim/simscsi.c
@@ -205,10 +205,11 @@ simscsi_get_disk_size (int fd)
 	char buf[512];
 
 	/*
-	 * This is a bit kludgey: the simulator doesn't provide a direct way of determining
-	 * the disk size, so we do a binary search, assuming a maximum disk size of 4GB.
+	 * This is a bit kludgey: the simulator doesn't provide a
+	 * direct way of determining the disk size, so we do a binary
+	 * search, assuming a maximum disk size of 128GB.
 	 */
-	for (bit = (4UL << 30)/512; bit != 0; bit >>= 1) {
+	for (bit = (128UL << 30)/512; bit != 0; bit >>= 1) {
 		req.addr = __pa(&buf);
 		req.len = sizeof(buf);
 		ia64_ssc(fd, 1, __pa(&req), ((sectors | bit) - 1)*512, SSC_READ);
@@ -225,8 +226,10 @@ simscsi_readwrite10 (struct scsi_cmnd *sc, int mode)
 {
 	unsigned long offset;
 
-	offset = (  (sc->cmnd[2] << 24) | (sc->cmnd[3] << 16)
-		  | (sc->cmnd[4] <<  8) | (sc->cmnd[5] <<  0))*512;
+	offset = (((unsigned long)sc->cmnd[2] << 24) 
+		| ((unsigned long)sc->cmnd[3] << 16)
+		| ((unsigned long)sc->cmnd[4] <<  8) 
+		| ((unsigned long)sc->cmnd[5] <<  0))*512UL;
 	if (sc->use_sg > 0)
 		simscsi_sg_readwrite(sc, mode, offset);
 	else