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path: root/drivers/parisc/lba_pci.c
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Diffstat (limited to 'drivers/parisc/lba_pci.c')
-rw-r--r--drivers/parisc/lba_pci.c193
1 files changed, 120 insertions, 73 deletions
diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c
index 3aeb3279c92..37e71ff6408 100644
--- a/drivers/parisc/lba_pci.c
+++ b/drivers/parisc/lba_pci.c
@@ -34,7 +34,7 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
-#include <linux/init.h> /* for __init and __devinit */
+#include <linux/init.h> /* for __init */
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/slab.h>
@@ -43,7 +43,6 @@
#include <asm/pdc.h>
#include <asm/pdcpat.h>
#include <asm/page.h>
-#include <asm/system.h>
#include <asm/ropes.h>
#include <asm/hardware.h> /* for register_parisc_driver() stuff */
@@ -190,8 +189,8 @@ lba_dump_res(struct resource *r, int d)
static int lba_device_present(u8 bus, u8 dfn, struct lba_device *d)
{
- u8 first_bus = d->hba.hba_bus->secondary;
- u8 last_sub_bus = d->hba.hba_bus->subordinate;
+ u8 first_bus = d->hba.hba_bus->busn_res.start;
+ u8 last_sub_bus = d->hba.hba_bus->busn_res.end;
if ((bus < first_bus) ||
(bus > last_sub_bus) ||
@@ -365,7 +364,7 @@ lba_rd_cfg(struct lba_device *d, u32 tok, u8 reg, u32 size)
static int elroy_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
{
struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
- u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
+ u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
u32 tok = LBA_CFG_TOK(local_bus, devfn);
void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
@@ -381,7 +380,7 @@ static int elroy_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int
return 0;
}
- if (LBA_SKIP_PROBE(d) && !lba_device_present(bus->secondary, devfn, d)) {
+ if (LBA_SKIP_PROBE(d) && !lba_device_present(bus->busn_res.start, devfn, d)) {
DBG_CFG("%s(%x+%2x) -> -1 (b)\n", __func__, tok, pos);
/* either don't want to look or know device isn't present. */
*data = ~0U;
@@ -432,7 +431,7 @@ lba_wr_cfg(struct lba_device *d, u32 tok, u8 reg, u32 data, u32 size)
static int elroy_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
{
struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
- u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
+ u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
u32 tok = LBA_CFG_TOK(local_bus,devfn);
if ((pos > 255) || (devfn > 255))
@@ -445,7 +444,7 @@ static int elroy_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int
return 0;
}
- if (LBA_SKIP_PROBE(d) && (!lba_device_present(bus->secondary, devfn, d))) {
+ if (LBA_SKIP_PROBE(d) && (!lba_device_present(bus->busn_res.start, devfn, d))) {
DBG_CFG("%s(%x+%2x) = 0x%x (b)\n", __func__, tok, pos,data);
return 1; /* New Workaround */
}
@@ -482,7 +481,7 @@ static struct pci_ops elroy_cfg_ops = {
static int mercury_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
{
struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
- u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
+ u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
u32 tok = LBA_CFG_TOK(local_bus, devfn);
void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
@@ -515,7 +514,7 @@ static int mercury_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, i
{
struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
- u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
+ u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
u32 tok = LBA_CFG_TOK(local_bus,devfn);
if ((pos > 255) || (devfn > 255))
@@ -614,6 +613,54 @@ truncate_pat_collision(struct resource *root, struct resource *new)
return 0; /* truncation successful */
}
+/*
+ * extend_lmmio_len: extend lmmio range to maximum length
+ *
+ * This is needed at least on C8000 systems to get the ATI FireGL card
+ * working. On other systems we will currently not extend the lmmio space.
+ */
+static unsigned long
+extend_lmmio_len(unsigned long start, unsigned long end, unsigned long lba_len)
+{
+ struct resource *tmp;
+
+ pr_debug("LMMIO mismatch: PAT length = 0x%lx, MASK register = 0x%lx\n",
+ end - start, lba_len);
+
+ lba_len = min(lba_len+1, 256UL*1024*1024); /* limit to 256 MB */
+
+ pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - original\n", start, end);
+
+ if (boot_cpu_data.cpu_type < mako) {
+ pr_info("LBA: Not a C8000 system - not extending LMMIO range.\n");
+ return end;
+ }
+
+ end += lba_len;
+ if (end < start) /* fix overflow */
+ end = -1ULL;
+
+ pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - current\n", start, end);
+
+ /* first overlap */
+ for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
+ pr_debug("LBA: testing %pR\n", tmp);
+ if (tmp->start == start)
+ continue; /* ignore ourself */
+ if (tmp->end < start)
+ continue;
+ if (tmp->start > end)
+ continue;
+ if (end >= tmp->start)
+ end = tmp->start - 1;
+ }
+
+ pr_info("LBA: lmmio_space [0x%lx-0x%lx] - new\n", start, end);
+
+ /* return new end */
+ return end;
+}
+
#else
#define truncate_pat_collision(r,n) (0)
#endif
@@ -630,15 +677,14 @@ truncate_pat_collision(struct resource *root, struct resource *new)
static void
lba_fixup_bus(struct pci_bus *bus)
{
- struct list_head *ln;
+ struct pci_dev *dev;
#ifdef FBB_SUPPORT
u16 status;
#endif
struct lba_device *ldev = LBA_DEV(parisc_walk_tree(bus->bridge));
- int lba_portbase = HBA_PORT_BASE(ldev->hba.hba_num);
DBG("lba_fixup_bus(0x%p) bus %d platform_data 0x%p\n",
- bus, bus->secondary, bus->bridge->platform_data);
+ bus, (int)bus->busn_res.start, bus->bridge->platform_data);
/*
** Properly Setup MMIO resources for this bus.
@@ -653,7 +699,7 @@ lba_fixup_bus(struct pci_bus *bus)
}
} else {
/* Host-PCI Bridge */
- int err, i;
+ int err;
DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n",
ldev->hba.io_space.name,
@@ -669,11 +715,8 @@ lba_fixup_bus(struct pci_bus *bus)
lba_dump_res(&ioport_resource, 2);
BUG();
}
- /* advertize Host bridge resources to PCI bus */
- bus->resource[0] = &(ldev->hba.io_space);
- i = 1;
- if (ldev->hba.elmmio_space.start) {
+ if (ldev->hba.elmmio_space.flags) {
err = request_resource(&iomem_resource,
&(ldev->hba.elmmio_space));
if (err < 0) {
@@ -685,35 +728,17 @@ lba_fixup_bus(struct pci_bus *bus)
/* lba_dump_res(&iomem_resource, 2); */
/* BUG(); */
- } else
- bus->resource[i++] = &(ldev->hba.elmmio_space);
+ }
}
-
- /* Overlaps with elmmio can (and should) fail here.
- * We will prune (or ignore) the distributed range.
- *
- * FIXME: SBA code should register all elmmio ranges first.
- * that would take care of elmmio ranges routed
- * to a different rope (already discovered) from
- * getting registered *after* LBA code has already
- * registered it's distributed lmmio range.
- */
- if (truncate_pat_collision(&iomem_resource,
- &(ldev->hba.lmmio_space))) {
-
- printk(KERN_WARNING "LBA: lmmio_space [%lx/%lx] duplicate!\n",
- (long)ldev->hba.lmmio_space.start,
- (long)ldev->hba.lmmio_space.end);
- } else {
+ if (ldev->hba.lmmio_space.flags) {
err = request_resource(&iomem_resource, &(ldev->hba.lmmio_space));
if (err < 0) {
printk(KERN_ERR "FAILED: lba_fixup_bus() request for "
"lmmio_space [%lx/%lx]\n",
(long)ldev->hba.lmmio_space.start,
(long)ldev->hba.lmmio_space.end);
- } else
- bus->resource[i++] = &(ldev->hba.lmmio_space);
+ }
}
#ifdef CONFIG_64BIT
@@ -728,15 +753,13 @@ lba_fixup_bus(struct pci_bus *bus)
lba_dump_res(&iomem_resource, 2);
BUG();
}
- bus->resource[i++] = &(ldev->hba.gmmio_space);
}
#endif
}
- list_for_each(ln, &bus->devices) {
+ list_for_each_entry(dev, &bus->devices, bus_list) {
int i;
- struct pci_dev *dev = pci_dev_b(ln);
DBG("lba_fixup_bus() %s\n", pci_name(dev));
@@ -748,27 +771,6 @@ lba_fixup_bus(struct pci_bus *bus)
if (!res->start)
continue;
- if (res->flags & IORESOURCE_IO) {
- DBG("lba_fixup_bus() I/O Ports [%lx/%lx] -> ",
- res->start, res->end);
- res->start |= lba_portbase;
- res->end |= lba_portbase;
- DBG("[%lx/%lx]\n", res->start, res->end);
- } else if (res->flags & IORESOURCE_MEM) {
- /*
- ** Convert PCI (IO_VIEW) addresses to
- ** processor (PA_VIEW) addresses
- */
- DBG("lba_fixup_bus() MMIO [%lx/%lx] -> ",
- res->start, res->end);
- res->start = PCI_HOST_ADDR(HBA_DATA(ldev), res->start);
- res->end = PCI_HOST_ADDR(HBA_DATA(ldev), res->end);
- DBG("[%lx/%lx]\n", res->start, res->end);
- } else {
- DBG("lba_fixup_bus() WTF? 0x%lx [%lx/%lx] XXX",
- res->flags, res->start, res->end);
- }
-
/*
** FIXME: this will result in whinging for devices
** that share expansion ROMs (think quad tulip), but
@@ -815,7 +817,7 @@ lba_fixup_bus(struct pci_bus *bus)
}
/* Lastly enable FBB/PERR/SERR on all devices too */
- list_for_each(ln, &bus->devices) {
+ list_for_each_entry(dev, &bus->devices, bus_list) {
(void) pci_read_config_word(dev, PCI_COMMAND, &status);
status |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR | fbb_enable;
(void) pci_write_config_word(dev, PCI_COMMAND, status);
@@ -1034,11 +1036,20 @@ lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
case PAT_PBNUM:
lba_dev->hba.bus_num.start = p->start;
lba_dev->hba.bus_num.end = p->end;
+ lba_dev->hba.bus_num.flags = IORESOURCE_BUS;
break;
case PAT_LMMIO:
/* used to fix up pre-initialized MEM BARs */
- if (!lba_dev->hba.lmmio_space.start) {
+ if (!lba_dev->hba.lmmio_space.flags) {
+ unsigned long lba_len;
+
+ lba_len = ~READ_REG32(lba_dev->hba.base_addr
+ + LBA_LMMIO_MASK);
+ if ((p->end - p->start) != lba_len)
+ p->end = extend_lmmio_len(p->start,
+ p->end, lba_len);
+
sprintf(lba_dev->hba.lmmio_name,
"PCI%02x LMMIO",
(int)lba_dev->hba.bus_num.start);
@@ -1046,7 +1057,7 @@ lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
io->start;
r = &lba_dev->hba.lmmio_space;
r->name = lba_dev->hba.lmmio_name;
- } else if (!lba_dev->hba.elmmio_space.start) {
+ } else if (!lba_dev->hba.elmmio_space.flags) {
sprintf(lba_dev->hba.elmmio_name,
"PCI%02x ELMMIO",
(int)lba_dev->hba.bus_num.start);
@@ -1141,6 +1152,7 @@ lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
r->name = "LBA PCI Busses";
r->start = lba_num & 0xff;
r->end = (lba_num>>8) & 0xff;
+ r->flags = IORESOURCE_BUS;
/* Set up local PCI Bus resources - we don't need them for
** Legacy boxes but it's nice to see in /proc/iomem.
@@ -1404,12 +1416,14 @@ static int __init
lba_driver_probe(struct parisc_device *dev)
{
struct lba_device *lba_dev;
+ LIST_HEAD(resources);
struct pci_bus *lba_bus;
struct pci_ops *cfg_ops;
u32 func_class;
void *tmp_obj;
char *version;
void __iomem *addr = ioremap_nocache(dev->hpa.start, 4096);
+ int max;
/* Read HW Rev First */
func_class = READ_REG32(addr + LBA_FCLASS);
@@ -1518,10 +1532,46 @@ lba_driver_probe(struct parisc_device *dev)
if (lba_dev->hba.bus_num.start < lba_next_bus)
lba_dev->hba.bus_num.start = lba_next_bus;
+ /* Overlaps with elmmio can (and should) fail here.
+ * We will prune (or ignore) the distributed range.
+ *
+ * FIXME: SBA code should register all elmmio ranges first.
+ * that would take care of elmmio ranges routed
+ * to a different rope (already discovered) from
+ * getting registered *after* LBA code has already
+ * registered it's distributed lmmio range.
+ */
+ if (truncate_pat_collision(&iomem_resource,
+ &(lba_dev->hba.lmmio_space))) {
+ printk(KERN_WARNING "LBA: lmmio_space [%lx/%lx] duplicate!\n",
+ (long)lba_dev->hba.lmmio_space.start,
+ (long)lba_dev->hba.lmmio_space.end);
+ lba_dev->hba.lmmio_space.flags = 0;
+ }
+
+ pci_add_resource_offset(&resources, &lba_dev->hba.io_space,
+ HBA_PORT_BASE(lba_dev->hba.hba_num));
+ if (lba_dev->hba.elmmio_space.flags)
+ pci_add_resource_offset(&resources, &lba_dev->hba.elmmio_space,
+ lba_dev->hba.lmmio_space_offset);
+ if (lba_dev->hba.lmmio_space.flags)
+ pci_add_resource_offset(&resources, &lba_dev->hba.lmmio_space,
+ lba_dev->hba.lmmio_space_offset);
+ if (lba_dev->hba.gmmio_space.flags)
+ pci_add_resource(&resources, &lba_dev->hba.gmmio_space);
+
+ pci_add_resource(&resources, &lba_dev->hba.bus_num);
+
dev->dev.platform_data = lba_dev;
lba_bus = lba_dev->hba.hba_bus =
- pci_scan_bus_parented(&dev->dev, lba_dev->hba.bus_num.start,
- cfg_ops, NULL);
+ pci_create_root_bus(&dev->dev, lba_dev->hba.bus_num.start,
+ cfg_ops, NULL, &resources);
+ if (!lba_bus) {
+ pci_free_resource_list(&resources);
+ return 0;
+ }
+
+ max = pci_scan_child_bus(lba_bus);
/* This is in lieu of calling pci_assign_unassigned_resources() */
if (is_pdc_pat()) {
@@ -1540,7 +1590,6 @@ lba_driver_probe(struct parisc_device *dev)
lba_dump_res(&lba_dev->hba.lmmio_space, 2);
#endif
}
- pci_enable_bridges(lba_bus);
/*
** Once PCI register ops has walked the bus, access to config
@@ -1551,10 +1600,8 @@ lba_driver_probe(struct parisc_device *dev)
lba_dev->flags |= LBA_FLAG_SKIP_PROBE;
}
- if (lba_bus) {
- lba_next_bus = lba_bus->subordinate + 1;
- pci_bus_add_devices(lba_bus);
- }
+ lba_next_bus = max + 1;
+ pci_bus_add_devices(lba_bus);
/* Whew! Finally done! Tell services we got this one covered. */
return 0;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 11:52:07 +0000