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Diffstat (limited to 'arch/mips/pci/pci-ip27.c')
-rw-r--r--arch/mips/pci/pci-ip27.c370
1 files changed, 52 insertions, 318 deletions
diff --git a/arch/mips/pci/pci-ip27.c b/arch/mips/pci/pci-ip27.c
index efc96ce99ee..0f09eafa5e3 100644
--- a/arch/mips/pci/pci-ip27.c
+++ b/arch/mips/pci/pci-ip27.c
@@ -7,17 +7,16 @@
* Copyright (C) 1999, 2000, 04 Ralf Baechle (ralf@linux-mips.org)
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
-#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/export.h>
#include <linux/pci.h>
+#include <linux/smp.h>
#include <asm/sn/arch.h>
#include <asm/pci/bridge.h>
#include <asm/paccess.h>
#include <asm/sn/intr.h>
#include <asm/sn/sn0/hub.h>
-extern unsigned int allocate_irqno(void);
-
/*
* Max #PCI busses we can handle; ie, max #PCI bridges.
*/
@@ -30,7 +29,7 @@ extern unsigned int allocate_irqno(void);
/*
* XXX: No kmalloc available when we do our crosstalk scan,
- * we should try to move it later in the boot process.
+ * we should try to move it later in the boot process.
*/
static struct bridge_controller bridges[MAX_PCI_BUSSES];
@@ -40,299 +39,9 @@ static struct bridge_controller bridges[MAX_PCI_BUSSES];
struct bridge_controller *irq_to_bridge[MAX_PCI_BUSSES * MAX_DEVICES_PER_PCIBUS];
int irq_to_slot[MAX_PCI_BUSSES * MAX_DEVICES_PER_PCIBUS];
-/*
- * The Bridge ASIC supports both type 0 and type 1 access. Type 1 is
- * not really documented, so right now I can't write code which uses it.
- * Therefore we use type 0 accesses for now even though they won't work
- * correcly for PCI-to-PCI bridges.
- *
- * The function is complicated by the ultimate brokeness of the IOC3 chip
- * which is used in SGI systems. The IOC3 can only handle 32-bit PCI
- * accesses and does only decode parts of it's address space.
- */
-
-static int pci_conf0_read_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 * value)
-{
- struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
- bridge_t *bridge = bc->base;
- int slot = PCI_SLOT(devfn);
- int fn = PCI_FUNC(devfn);
- volatile void *addr;
- u32 cf, shift, mask;
- int res;
-
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[PCI_VENDOR_ID];
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at it for real ...
- */
- if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
- goto oh_my_gawd;
-
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[where ^ (4 - size)];
-
- if (size == 1)
- res = get_dbe(*value, (u8 *) addr);
- else if (size == 2)
- res = get_dbe(*value, (u16 *) addr);
- else
- res = get_dbe(*value, (u32 *) addr);
-
- return res ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
-
-oh_my_gawd:
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at the wrong register.
- */
- if ((where >= 0x14 && where < 0x40) || (where >= 0x48)) {
- *value = 0;
- return PCIBIOS_SUCCESSFUL;
- }
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't try to access
- * anything but 32-bit words ...
- */
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- shift = ((where & 3) << 3);
- mask = (0xffffffffU >> ((4 - size) << 3));
- *value = (cf >> shift) & mask;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_read_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 * value)
-{
- struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
- bridge_t *bridge = bc->base;
- int busno = bus->number;
- int slot = PCI_SLOT(devfn);
- int fn = PCI_FUNC(devfn);
- volatile void *addr;
- u32 cf, shift, mask;
- int res;
-
- bridge->b_pci_cfg = (busno << 16) | (slot << 11);
- addr = &bridge->b_type1_cfg.c[(fn << 8) | PCI_VENDOR_ID];
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at it for real ...
- */
- if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
- goto oh_my_gawd;
-
- bridge->b_pci_cfg = (busno << 16) | (slot << 11);
- addr = &bridge->b_type1_cfg.c[(fn << 8) | (where ^ (4 - size))];
-
- if (size == 1)
- res = get_dbe(*value, (u8 *) addr);
- else if (size == 2)
- res = get_dbe(*value, (u16 *) addr);
- else
- res = get_dbe(*value, (u32 *) addr);
-
- return res ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
-
-oh_my_gawd:
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at the wrong register.
- */
- if ((where >= 0x14 && where < 0x40) || (where >= 0x48)) {
- *value = 0;
- return PCIBIOS_SUCCESSFUL;
- }
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't try to access
- * anything but 32-bit words ...
- */
- bridge->b_pci_cfg = (busno << 16) | (slot << 11);
- addr = &bridge->b_type1_cfg.c[(fn << 8) | where];
-
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- shift = ((where & 3) << 3);
- mask = (0xffffffffU >> ((4 - size) << 3));
- *value = (cf >> shift) & mask;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_read_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 * value)
-{
- if (bus->number > 0)
- return pci_conf1_read_config(bus, devfn, where, size, value);
-
- return pci_conf0_read_config(bus, devfn, where, size, value);
-}
+extern struct pci_ops bridge_pci_ops;
-static int pci_conf0_write_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 value)
-{
- struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
- bridge_t *bridge = bc->base;
- int slot = PCI_SLOT(devfn);
- int fn = PCI_FUNC(devfn);
- volatile void *addr;
- u32 cf, shift, mask, smask;
- int res;
-
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[PCI_VENDOR_ID];
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at it for real ...
- */
- if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
- goto oh_my_gawd;
-
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[where ^ (4 - size)];
-
- if (size == 1) {
- res = put_dbe(value, (u8 *) addr);
- } else if (size == 2) {
- res = put_dbe(value, (u16 *) addr);
- } else {
- res = put_dbe(value, (u32 *) addr);
- }
-
- if (res)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-
-oh_my_gawd:
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to touch the wrong register.
- */
- if ((where >= 0x14 && where < 0x40) || (where >= 0x48))
- return PCIBIOS_SUCCESSFUL;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't try to access
- * anything but 32-bit words ...
- */
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- shift = ((where & 3) << 3);
- mask = (0xffffffffU >> ((4 - size) << 3));
- smask = mask << shift;
-
- cf = (cf & ~smask) | ((value & mask) << shift);
- if (put_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_write_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 value)
-{
- struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
- bridge_t *bridge = bc->base;
- int slot = PCI_SLOT(devfn);
- int fn = PCI_FUNC(devfn);
- int busno = bus->number;
- volatile void *addr;
- u32 cf, shift, mask, smask;
- int res;
-
- bridge->b_pci_cfg = (busno << 16) | (slot << 11);
- addr = &bridge->b_type1_cfg.c[(fn << 8) | PCI_VENDOR_ID];
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at it for real ...
- */
- if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
- goto oh_my_gawd;
-
- addr = &bridge->b_type1_cfg.c[(fn << 8) | (where ^ (4 - size))];
-
- if (size == 1) {
- res = put_dbe(value, (u8 *) addr);
- } else if (size == 2) {
- res = put_dbe(value, (u16 *) addr);
- } else {
- res = put_dbe(value, (u32 *) addr);
- }
-
- if (res)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-
-oh_my_gawd:
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to touch the wrong register.
- */
- if ((where >= 0x14 && where < 0x40) || (where >= 0x48))
- return PCIBIOS_SUCCESSFUL;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't try to access
- * anything but 32-bit words ...
- */
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- shift = ((where & 3) << 3);
- mask = (0xffffffffU >> ((4 - size) << 3));
- smask = mask << shift;
-
- cf = (cf & ~smask) | ((value & mask) << shift);
- if (put_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_write_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 value)
-{
- if (bus->number > 0)
- return pci_conf1_write_config(bus, devfn, where, size, value);
-
- return pci_conf0_write_config(bus, devfn, where, size, value);
-}
-
-static struct pci_ops bridge_pci_ops = {
- .read = pci_read_config,
- .write = pci_write_config,
-};
-
-int __init bridge_probe(nasid_t nasid, int widget_id, int masterwid)
+int bridge_probe(nasid_t nasid, int widget_id, int masterwid)
{
unsigned long offset = NODE_OFFSET(nasid);
struct bridge_controller *bc;
@@ -340,6 +49,8 @@ int __init bridge_probe(nasid_t nasid, int widget_id, int masterwid)
bridge_t *bridge;
int slot;
+ pci_set_flags(PCI_PROBE_ONLY);
+
printk("a bridge\n");
/* XXX: kludge alert.. */
@@ -370,8 +81,7 @@ int __init bridge_probe(nasid_t nasid, int widget_id, int masterwid)
bc->widget_id = widget_id;
bc->nasid = nasid;
- bc->baddr = (u64)masterwid << 60;
- bc->baddr |= (1UL << 56); /* Barrier set */
+ bc->baddr = (u64)masterwid << 60 | PCI64_ATTR_BAR;
/*
* point to this bridge
@@ -379,20 +89,25 @@ int __init bridge_probe(nasid_t nasid, int widget_id, int masterwid)
bridge = (bridge_t *) RAW_NODE_SWIN_BASE(nasid, widget_id);
/*
- * Clear all pending interrupts.
- */
+ * Clear all pending interrupts.
+ */
bridge->b_int_rst_stat = BRIDGE_IRR_ALL_CLR;
/*
- * Until otherwise set up, assume all interrupts are from slot 0
- */
+ * Until otherwise set up, assume all interrupts are from slot 0
+ */
bridge->b_int_device = 0x0;
/*
- * swap pio's to pci mem and io space (big windows)
- */
+ * swap pio's to pci mem and io space (big windows)
+ */
bridge->b_wid_control |= BRIDGE_CTRL_IO_SWAP |
- BRIDGE_CTRL_MEM_SWAP;
+ BRIDGE_CTRL_MEM_SWAP;
+#ifdef CONFIG_PAGE_SIZE_4KB
+ bridge->b_wid_control &= ~BRIDGE_CTRL_PAGE_SIZE;
+#else /* 16kB or larger */
+ bridge->b_wid_control |= BRIDGE_CTRL_PAGE_SIZE;
+#endif
/*
* Hmm... IRIX sets additional bits in the address which
@@ -407,7 +122,7 @@ int __init bridge_probe(nasid_t nasid, int widget_id, int masterwid)
bridge->b_device[slot].reg |= BRIDGE_DEV_SWAP_DIR;
bc->pci_int[slot] = -1;
}
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
+ bridge->b_wid_tflush; /* wait until Bridge PIO complete */
bc->base = bridge;
@@ -427,32 +142,48 @@ int __init bridge_probe(nasid_t nasid, int widget_id, int masterwid)
* A given PCI device, in general, should be able to intr any of the cpus
* on any one of the hubs connected to its xbow.
*/
-int __devinit pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+ return 0;
+}
+
+static inline struct pci_dev *bridge_root_dev(struct pci_dev *dev)
+{
+ while (dev->bus->parent) {
+ /* Move up the chain of bridges. */
+ dev = dev->bus->self;
+ }
+
+ return dev;
+}
+
+/* Do platform specific device initialization at pci_enable_device() time */
+int pcibios_plat_dev_init(struct pci_dev *dev)
{
struct bridge_controller *bc = BRIDGE_CONTROLLER(dev->bus);
- int irq = bc->pci_int[slot];
+ struct pci_dev *rdev = bridge_root_dev(dev);
+ int slot = PCI_SLOT(rdev->devfn);
+ int irq;
+ irq = bc->pci_int[slot];
if (irq == -1) {
- irq = bc->pci_int[slot] = request_bridge_irq(bc);
+ irq = request_bridge_irq(bc);
if (irq < 0)
- panic("Can't allocate interrupt for PCI device %s\n",
- pci_name(dev));
+ return irq;
+
+ bc->pci_int[slot] = irq;
}
irq_to_bridge[irq] = bc;
irq_to_slot[irq] = slot;
- return irq;
-}
+ dev->irq = irq;
-/* Do platform specific device initialization at pci_enable_device() time */
-int pcibios_plat_dev_init(struct pci_dev *dev)
-{
return 0;
}
/*
- * Device might live on a subordinate PCI bus. XXX Walk up the chain of buses
+ * Device might live on a subordinate PCI bus. XXX Walk up the chain of buses
* to find the slot number in sense of the bridge device register.
* XXX This also means multiple devices might rely on conflicting bridge
* settings.
@@ -480,17 +211,20 @@ static inline void pci_enable_swapping(struct pci_dev *dev)
bridge->b_widget.w_tflush; /* Flush */
}
-static void __init pci_fixup_ioc3(struct pci_dev *d)
+static void pci_fixup_ioc3(struct pci_dev *d)
{
pci_disable_swapping(d);
}
+#ifdef CONFIG_NUMA
int pcibus_to_node(struct pci_bus *bus)
{
struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
return bc->nasid;
}
+EXPORT_SYMBOL(pcibus_to_node);
+#endif /* CONFIG_NUMA */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3,
pci_fixup_ioc3);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 00:10:41 +0000