[PATCH] [SCSI] mpt fusion: Fix 32 bit platforms with 64 bit resources.

[pbathija at amcc.com]

From: Pravin Bathija <pbathija at amcc.com>

Powerpc 44x uses 36 bit real address while the real address defined
in MPT Fusion driver is of type 32 bit. This causes ioremap to fail and driver
fails to initialize. This fix changes the data types representing the real
address from unsigned long 32-bit types to "phys_addr_t" which is 64-bit. The
driver has been tested, the disks get discovered correctly and can do IO. Also,
replaced phys_addr_t with resource_size_t as suggested by Ben.

Signed-off-by: Pravin Bathija <pbathija at amcc.com>
Acked-by: Feng Kan <fkan at amcc.com>
Acked-by: Prodyut Hazarika <phazarika at amcc.com>
Acked-by: Loc Ho <lho at amcc.com>
Acked-by: Tirumala Reddy Marri <tmarri at amcc.com>
Acked-by: Victor Gallardo <vgallardo at amcc.com>

---
 drivers/message/fusion/mptbase.c |   34 +++++++++++++++++++++++++---------
 drivers/message/fusion/mptbase.h |    5 +++--
 2 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 5d496a9..e296f2e 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -1510,11 +1510,12 @@ static int
 mpt_mapresources(MPT_ADAPTER *ioc)
 {
 	u8		__iomem *mem;
+	u8		__iomem *port;
 	int		 ii;
-	unsigned long	 mem_phys;
-	unsigned long	 port;
-	u32		 msize;
-	u32		 psize;
+	resource_size_t	 mem_phys;
+	resource_size_t	 port_phys;
+	resource_size_t	 msize;
+	resource_size_t	 psize;
 	u8		 revision;
 	int		 r = -ENODEV;
 	struct pci_dev *pdev;
@@ -1552,13 +1553,13 @@ mpt_mapresources(MPT_ADAPTER *ioc)
 	}
 
 	mem_phys = msize = 0;
-	port = psize = 0;
+	port_phys = psize = 0;
 	for (ii = 0; ii < DEVICE_COUNT_RESOURCE; ii++) {
 		if (pci_resource_flags(pdev, ii) & PCI_BASE_ADDRESS_SPACE_IO) {
 			if (psize)
 				continue;
 			/* Get I/O space! */
-			port = pci_resource_start(pdev, ii);
+			port_phys = pci_resource_start(pdev, ii);
 			psize = pci_resource_len(pdev, ii);
 		} else {
 			if (msize)
@@ -1580,14 +1581,23 @@ mpt_mapresources(MPT_ADAPTER *ioc)
 		return -EINVAL;
 	}
 	ioc->memmap = mem;
-	dinitprintk(ioc, printk(MYIOC_s_INFO_FMT "mem = %p, mem_phys = %lx\n",
-	    ioc->name, mem, mem_phys));
+	dinitprintk(ioc, printk(MYIOC_s_INFO_FMT "mem = %p, mem_phys = %llx\n",
+	    ioc->name, mem, (u64)mem_phys));
 
 	ioc->mem_phys = mem_phys;
 	ioc->chip = (SYSIF_REGS __iomem *)mem;
 
 	/* Save Port IO values in case we need to do downloadboot */
-	ioc->pio_mem_phys = port;
+	port = ioremap(port_phys, psize);
+	if (port == NULL) {
+		printk(MYIOC_s_ERR_FMT " : ERROR - Unable to map adapter"
+			" port !\n", ioc->name);
+		return -EINVAL;
+	}
+	ioc->portmap = port;
+	dinitprintk(ioc, printk(MYIOC_s_INFO_FMT "port=%p, port_phys=%llx\n",
+			ioc->name, port, (u64)port_phys));
+	ioc->pio_mem_phys = port_phys;
 	ioc->pio_chip = (SYSIF_REGS __iomem *)port;
 
 	return 0;
@@ -1822,6 +1832,7 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
 		if (ioc->alt_ioc)
 			ioc->alt_ioc->alt_ioc = NULL;
 		iounmap(ioc->memmap);
+		iounmap(ioc->portmap);
 		if (r != -5)
 			pci_release_selected_regions(pdev, ioc->bars);
 
@@ -2583,6 +2594,11 @@ mpt_adapter_dispose(MPT_ADAPTER *ioc)
 		ioc->memmap = NULL;
 	}
 
+	if (ioc->portmap != NULL) {
+		iounmap(ioc->portmap);
+		ioc->portmap = NULL;
+	}
+
 	pci_disable_device(ioc->pcidev);
 	pci_release_selected_regions(ioc->pcidev, ioc->bars);
 
diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index b3e981d..7091f13 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -584,8 +584,8 @@ typedef struct _MPT_ADAPTER
 	SYSIF_REGS __iomem	*chip;		/* == c8817000 (mmap) */
 	SYSIF_REGS __iomem	*pio_chip;	/* Programmed IO (downloadboot) */
 	u8			 bus_type;
-	u32			 mem_phys;	/* == f4020000 (mmap) */
-	u32			 pio_mem_phys;	/* Programmed IO (downloadboot) */
+	resource_size_t		 mem_phys;	/* == f4020000 (mmap) */
+	resource_size_t		 pio_mem_phys;	/* Programmed IO (downloadboot) */
 	int			 mem_size;	/* mmap memory size */
 	int			 number_of_buses;
 	int			 devices_per_bus;
@@ -635,6 +635,7 @@ typedef struct _MPT_ADAPTER
 	int			bars;		/* bitmask of BAR's that must be configured */
 	int			msi_enable;
 	u8			__iomem *memmap;	/* mmap address */
+	u8			__iomem *portmap;	/* mmap port address */
 	struct Scsi_Host	*sh;		/* Scsi Host pointer */
 	SpiCfgData		spi_data;	/* Scsi config. data */
 	RaidCfgData		raid_data;	/* Raid config. data */
-- 
1.5.5