[U-Boot] [PATCH 01/10] pci: Allow for PCI addresses to be 64-bit

[Kumar Gala <galak@kernel.crashing.org>]

PCI bus is inherently 64-bit.  While not all system require access to
the full 64-bit PCI address range some do.  This allows those systems
to enable the full PCI address width via CONFIG_SYS_PCI_64BIT.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 drivers/pci/pci.c      |   37 ++++++++++++++------
 drivers/pci/pci_auto.c |   88 ++++++++++++++++++++++++++++-------------------
 include/pci.h          |   40 +++++++++++++---------
 3 files changed, 102 insertions(+), 63 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 41780db..e2b05d8 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -218,12 +218,12 @@ pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index)
  *
  */
 
-unsigned long pci_hose_phys_to_bus (struct pci_controller *hose,
+pci_addr_t pci_hose_phys_to_bus (struct pci_controller *hose,
 				    phys_addr_t phys_addr,
 				    unsigned long flags)
 {
 	struct pci_region *res;
-	unsigned long bus_addr;
+	pci_addr_t bus_addr;
 	int i;
 
 	if (!hose) {
@@ -252,7 +252,7 @@ Done:
 }
 
 phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose,
-				 unsigned long bus_addr,
+				 pci_addr_t bus_addr,
 				 unsigned long flags)
 {
 	struct pci_region *res;
@@ -288,15 +288,17 @@ Done:
 int pci_hose_config_device(struct pci_controller *hose,
 			   pci_dev_t dev,
 			   unsigned long io,
-			   unsigned long mem,
+			   pci_addr_t mem,
 			   unsigned long command)
 {
-	unsigned int bar_response, bar_size, bar_value, old_command;
+	unsigned int bar_response, old_command;
+	pci_addr_t bar_value;
+	pci_size_t bar_size;
 	unsigned char pin;
 	int bar, found_mem64;
 
-	debug ("PCI Config: I/O=0x%lx, Memory=0x%lx, Command=0x%lx\n",
-		io, mem, command);
+	debug ("PCI Config: I/O=0x%lx, Memory=0x%llx, Command=0x%lx\n",
+		io, (u64)mem, command);
 
 	pci_hose_write_config_dword (hose, dev, PCI_COMMAND, 0);
 
@@ -319,10 +321,19 @@ int pci_hose_config_device(struct pci_controller *hose,
 			io = io + bar_size;
 		} else {
 			if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
-				PCI_BASE_ADDRESS_MEM_TYPE_64)
-				found_mem64 = 1;
+				PCI_BASE_ADDRESS_MEM_TYPE_64) {
+				u32 bar_response_upper;
+				u64 bar64;
+				pci_hose_write_config_dword(hose, dev, bar+4, 0xffffffff);
+				pci_hose_read_config_dword(hose, dev, bar+4, &bar_response_upper);
 
-			bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+				bar64 = ((u64)bar_response_upper << 32) | bar_response;
+
+				bar_size = ~(bar64 & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+				found_mem64 = 1;
+			} else {
+				bar_size = (u32)(~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1);
+			}
 
 			/* round up region base address to multiple of size */
 			mem = ((mem - 1) | (bar_size - 1)) + 1;
@@ -332,11 +343,15 @@ int pci_hose_config_device(struct pci_controller *hose,
 		}
 
 		/* Write it out and update our limit */
-		pci_hose_write_config_dword (hose, dev, bar, bar_value);
+		pci_hose_write_config_dword (hose, dev, bar, (u32)bar_value);
 
 		if (found_mem64) {
 			bar += 4;
+#ifdef CONFIG_SYS_PCI_64BIT
+			pci_hose_write_config_dword(hose, dev, bar, (u32)(bar_value>>32));
+#else
 			pci_hose_write_config_dword (hose, dev, bar, 0x00000000);
+#endif
 		}
 	}
 
diff --git a/drivers/pci/pci_auto.c b/drivers/pci/pci_auto.c
index 3844359..c20b981 100644
--- a/drivers/pci/pci_auto.c
+++ b/drivers/pci/pci_auto.c
@@ -45,14 +45,14 @@ void pciauto_region_init(struct pci_region* res)
 	res->bus_lower = res->bus_start ? res->bus_start : 0x1000;
 }
 
-void pciauto_region_align(struct pci_region *res, unsigned long size)
+void pciauto_region_align(struct pci_region *res, pci_size_t size)
 {
 	res->bus_lower = ((res->bus_lower - 1) | (size - 1)) + 1;
 }
 
-int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned int *bar)
+int pciauto_region_allocate(struct pci_region* res, pci_size_t size, pci_addr_t *bar)
 {
-	unsigned long addr;
+	pci_addr_t addr;
 
 	if (!res) {
 		DEBUGF("No resource");
@@ -68,13 +68,13 @@ int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned
 
 	res->bus_lower = addr + size;
 
-	DEBUGF("address=0x%lx bus_lower=%x", addr, res->bus_lower);
+	DEBUGF("address=0x%llx bus_lower=0x%llx", (u64)addr, (u64)res->bus_lower);
 
 	*bar = addr;
 	return 0;
 
  error:
-	*bar = 0xffffffff;
+	*bar = (pci_addr_t)-1;
 	return -1;
 }
 
@@ -88,7 +88,9 @@ void pciauto_setup_device(struct pci_controller *hose,
 			  struct pci_region *prefetch,
 			  struct pci_region *io)
 {
-	unsigned int bar_value, bar_response, bar_size;
+	unsigned int bar_response;
+	pci_addr_t bar_value;
+	pci_size_t bar_size;
 	unsigned int cmdstat = 0;
 	struct pci_region *bar_res;
 	int bar, bar_nr = 0;
@@ -114,33 +116,46 @@ void pciauto_setup_device(struct pci_controller *hose,
 				   & 0xffff) + 1;
 			bar_res = io;
 
-			DEBUGF("PCI Autoconfig: BAR %d, I/O, size=0x%x, ", bar_nr, bar_size);
+			DEBUGF("PCI Autoconfig: BAR %d, I/O, size=0x%llx, ", bar_nr, (u64)bar_size);
 		} else {
 			if ( (bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
-			     PCI_BASE_ADDRESS_MEM_TYPE_64)
-				found_mem64 = 1;
+			     PCI_BASE_ADDRESS_MEM_TYPE_64) {
+				u32 bar_response_upper;
+				u64 bar64;
+				pci_hose_write_config_dword(hose, dev, bar+4, 0xffffffff);
+				pci_hose_read_config_dword(hose, dev, bar+4, &bar_response_upper);
+
+				bar64 = ((u64)bar_response_upper << 32) | bar_response;
 
-			bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+				bar_size = ~(bar64 & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+				found_mem64 = 1;
+			} else {
+				bar_size = (u32)(~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1);
+			}
 			if (prefetch && (bar_response & PCI_BASE_ADDRESS_MEM_PREFETCH))
 				bar_res = prefetch;
 			else
 				bar_res = mem;
 
-			DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%x, ", bar_nr, bar_size);
+			DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%llx, ", bar_nr, (u64)bar_size);
 		}
 
 		if (pciauto_region_allocate(bar_res, bar_size, &bar_value) == 0) {
 			/* Write it out and update our limit */
-			pci_hose_write_config_dword(hose, dev, bar, bar_value);
+			pci_hose_write_config_dword(hose, dev, bar, (u32)bar_value);
 
-			/*
-			 * If we are a 64-bit decoder then increment to the
-			 * upper 32 bits of the bar and force it to locate
-			 * in the lower 4GB of memory.
-			 */
 			if (found_mem64) {
 				bar += 4;
+#ifdef CONFIG_SYS_PCI_64BIT
+				pci_hose_write_config_dword(hose, dev, bar, (u32)(bar_value>>32));
+#else
+				/*
+				 * If we are a 64-bit decoder then increment to the
+				 * upper 32 bits of the bar and force it to locate
+				 * in the lower 4GB of memory.
+				 */
 				pci_hose_write_config_dword(hose, dev, bar, 0x00000000);
+#endif
 			}
 
 			cmdstat |= (bar_response & PCI_BASE_ADDRESS_SPACE) ?
@@ -289,35 +304,36 @@ void pciauto_config_init(struct pci_controller *hose)
 	if (hose->pci_mem) {
 		pciauto_region_init(hose->pci_mem);
 
-		DEBUGF("PCI Autoconfig: Bus Memory region: [%lx-%lx],\n"
-		       "\t\tPhysical Memory [%x-%x]\n",
-		    hose->pci_mem->bus_start,
-		    hose->pci_mem->bus_start + hose->pci_mem->size - 1,
-		    hose->pci_mem->phys_start,
-		    hose->pci_mem->phys_start + hose->pci_mem->size - 1);
+		DEBUGF("PCI Autoconfig: Bus Memory region: [0x%llx-0x%llx],\n"
+		       "\t\tPhysical Memory [%llx-%llxx]\n",
+		    (u64)hose->pci_mem->bus_start,
+		    (u64)(hose->pci_mem->bus_start + hose->pci_mem->size - 1),
+		    (u64)hose->pci_mem->phys_start,
+		    (u64)(hose->pci_mem->phys_start + hose->pci_mem->size - 1));
 	}
 
 	if (hose->pci_prefetch) {
 		pciauto_region_init(hose->pci_prefetch);
 
-		DEBUGF("PCI Autoconfig: Bus Prefetchable Mem: [%lx-%lx],\n"
-		       "\t\tPhysical Memory [%x-%x]\n",
-		    hose->pci_prefetch->bus_start,
-		    hose->pci_prefetch->bus_start + hose->pci_prefetch->size - 1,
-		    hose->pci_prefetch->phys_start,
-		    hose->pci_prefetch->phys_start +
-				hose->pci_prefetch->size - 1);
+		DEBUGF("PCI Autoconfig: Bus Prefetchable Mem: [0x%llx-0x%llx],\n"
+		       "\t\tPhysical Memory [%llx-%llx]\n",
+		    (u64)hose->pci_prefetch->bus_start,
+		    (u64)(hose->pci_prefetch->bus_start +
+			    hose->pci_prefetch->size - 1),
+		    (u64)hose->pci_prefetch->phys_start,
+		    (u64)(hose->pci_prefetch->phys_start +
+			    hose->pci_prefetch->size - 1));
 	}
 
 	if (hose->pci_io) {
 		pciauto_region_init(hose->pci_io);
 
-		DEBUGF("PCI Autoconfig: Bus I/O region: [%lx-%lx],\n"
-		       "\t\tPhysical Memory: [%x-%x]\n",
-		    hose->pci_io->bus_start,
-		    hose->pci_io->bus_start + hose->pci_io->size - 1,
-		    hose->pci_io->phys_start,
-		    hose->pci_io->phys_start + hose->pci_io->size - 1);
+		DEBUGF("PCI Autoconfig: Bus I/O region: [0x%llx-0x%llx],\n"
+		       "\t\tPhysical Memory: [%llx-%llx]\n",
+		    (u64)hose->pci_io->bus_start,
+		    (u64)(hose->pci_io->bus_start + hose->pci_io->size - 1),
+		    (u64)hose->pci_io->phys_start,
+		    (u64)(hose->pci_io->phys_start + hose->pci_io->size - 1));
 
 	}
 }
diff --git a/include/pci.h b/include/pci.h
index 1c8e216..eebe8a8 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -101,8 +101,8 @@
 #define  PCI_BASE_ADDRESS_MEM_TYPE_1M	0x02	/* Below 1M [obsolete] */
 #define  PCI_BASE_ADDRESS_MEM_TYPE_64	0x04	/* 64 bit address */
 #define  PCI_BASE_ADDRESS_MEM_PREFETCH	0x08	/* prefetchable? */
-#define  PCI_BASE_ADDRESS_MEM_MASK	(~0x0fUL)
-#define  PCI_BASE_ADDRESS_IO_MASK	(~0x03UL)
+#define  PCI_BASE_ADDRESS_MEM_MASK	(~0x0fULL)
+#define  PCI_BASE_ADDRESS_IO_MASK	(~0x03ULL)
 /* bit 1 is reserved if address_space = 1 */
 
 /* Header type 0 (normal devices) */
@@ -111,7 +111,7 @@
 #define PCI_SUBSYSTEM_ID	0x2e
 #define PCI_ROM_ADDRESS		0x30	/* Bits 31..11 are address, 10..1 reserved */
 #define  PCI_ROM_ADDRESS_ENABLE 0x01
-#define PCI_ROM_ADDRESS_MASK	(~0x7ffUL)
+#define PCI_ROM_ADDRESS_MASK	(~0x7ffULL)
 
 #define PCI_CAPABILITY_LIST	0x34	/* Offset of first capability list entry */
 
@@ -312,13 +312,21 @@
 
 #include <pci_ids.h>
 
+#ifdef CONFIG_SYS_PCI_64BIT
+typedef u64 pci_addr_t;
+typedef u64 pci_size_t;
+#else
+typedef u32 pci_addr_t;
+typedef u32 pci_size_t;
+#endif
+
 struct pci_region {
-	unsigned long bus_start;		/* Start on the bus */
-	phys_addr_t phys_start;			/* Start in physical address space */
-	unsigned long size;			/* Size */
-	unsigned long flags;			/* Resource flags */
+	pci_addr_t bus_start;	/* Start on the bus */
+	phys_addr_t phys_start;	/* Start in physical address space */
+	pci_size_t size;	/* Size */
+	unsigned long flags;	/* Resource flags */
 
-	unsigned long bus_lower;
+	pci_addr_t bus_lower;
 };
 
 #define PCI_REGION_MEM		0x00000000	/* PCI memory space */
@@ -330,9 +338,9 @@ struct pci_region {
 #define PCI_REGION_RO		0x00000200	/* Read-only memory */
 
 extern __inline__ void pci_set_region(struct pci_region *reg,
-				      unsigned long bus_start,
+				      pci_addr_t bus_start,
 				      phys_addr_t phys_start,
-				      unsigned long size,
+				      pci_size_t size,
 				      unsigned long flags) {
 	reg->bus_start	= bus_start;
 	reg->phys_start = phys_start;
@@ -433,9 +441,9 @@ extern __inline__ void pci_set_ops(struct pci_controller *hose,
 extern void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data);
 
 extern phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose,
-					unsigned long addr, unsigned long flags);
-extern unsigned long pci_hose_phys_to_bus(struct pci_controller* hose,
-					  phys_addr_t addr, unsigned long flags);
+					pci_addr_t addr, unsigned long flags);
+extern pci_addr_t pci_hose_phys_to_bus(struct pci_controller* hose,
+					phys_addr_t addr, unsigned long flags);
 
 #define pci_phys_to_bus(dev, addr, flags) \
 	pci_hose_phys_to_bus(pci_bus_to_hose(PCI_BUS(dev)), (addr), (flags))
@@ -483,8 +491,8 @@ extern int pci_hose_scan(struct pci_controller *hose);
 extern int pci_hose_scan_bus(struct pci_controller *hose, int bus);
 
 extern void pciauto_region_init(struct pci_region* res);
-extern void pciauto_region_align(struct pci_region *res, unsigned long size);
-extern int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned int *bar);
+extern void pciauto_region_align(struct pci_region *res, pci_size_t size);
+extern int pciauto_region_allocate(struct pci_region* res, pci_size_t size, pci_addr_t *bar);
 extern void pciauto_setup_device(struct pci_controller *hose,
 				 pci_dev_t dev, int bars_num,
 				 struct pci_region *mem,
@@ -500,7 +508,7 @@ extern pci_dev_t pci_find_class(int wanted_class, int wanted_sub_code,
 extern int pci_hose_config_device(struct pci_controller *hose,
 				  pci_dev_t dev,
 				  unsigned long io,
-				  unsigned long mem,
+				  pci_addr_t mem,
 				  unsigned long command);
 
 #ifdef CONFIG_MPC824X
-- 
1.5.5.1