X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fparisc%2Flba_pci.c;h=21c4c299b3d6c823ae92b6f8af86741a86207484;hb=645d11d4baa56c6830daac46a92d63b7093cbc09;hp=5e495dcbc58a5c61659425d50d675a4cd38563f5;hpb=2fc2991175bf77395e6b15fe6b2304d3bf72da40;p=linux-2.6 diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c index 5e495dcbc5..21c4c299b3 100644 --- a/drivers/parisc/lba_pci.c +++ b/drivers/parisc/lba_pci.c @@ -46,9 +46,9 @@ #include #include +#include #include /* for register_parisc_driver() stuff */ #include -#include /* for iosapic_register() */ #include /* read/write stuff */ #undef DEBUG_LBA /* general stuff */ @@ -100,112 +100,9 @@ #define MODULE_NAME "LBA" -#define LBA_FUNC_ID 0x0000 /* function id */ -#define LBA_FCLASS 0x0008 /* function class, bist, header, rev... */ -#define LBA_CAPABLE 0x0030 /* capabilities register */ - -#define LBA_PCI_CFG_ADDR 0x0040 /* poke CFG address here */ -#define LBA_PCI_CFG_DATA 0x0048 /* read or write data here */ - -#define LBA_PMC_MTLT 0x0050 /* Firmware sets this - read only. */ -#define LBA_FW_SCRATCH 0x0058 /* Firmware writes the PCI bus number here. */ -#define LBA_ERROR_ADDR 0x0070 /* On error, address gets logged here */ - -#define LBA_ARB_MASK 0x0080 /* bit 0 enable arbitration. PAT/PDC enables */ -#define LBA_ARB_PRI 0x0088 /* firmware sets this. */ -#define LBA_ARB_MODE 0x0090 /* firmware sets this. */ -#define LBA_ARB_MTLT 0x0098 /* firmware sets this. */ - -#define LBA_MOD_ID 0x0100 /* Module ID. PDC_PAT_CELL reports 4 */ - -#define LBA_STAT_CTL 0x0108 /* Status & Control */ -#define LBA_BUS_RESET 0x01 /* Deassert PCI Bus Reset Signal */ -#define CLEAR_ERRLOG 0x10 /* "Clear Error Log" cmd */ -#define CLEAR_ERRLOG_ENABLE 0x20 /* "Clear Error Log" Enable */ -#define HF_ENABLE 0x40 /* enable HF mode (default is -1 mode) */ - -#define LBA_LMMIO_BASE 0x0200 /* < 4GB I/O address range */ -#define LBA_LMMIO_MASK 0x0208 - -#define LBA_GMMIO_BASE 0x0210 /* > 4GB I/O address range */ -#define LBA_GMMIO_MASK 0x0218 - -#define LBA_WLMMIO_BASE 0x0220 /* All < 4GB ranges under the same *SBA* */ -#define LBA_WLMMIO_MASK 0x0228 - -#define LBA_WGMMIO_BASE 0x0230 /* All > 4GB ranges under the same *SBA* */ -#define LBA_WGMMIO_MASK 0x0238 - -#define LBA_IOS_BASE 0x0240 /* I/O port space for this LBA */ -#define LBA_IOS_MASK 0x0248 - -#define LBA_ELMMIO_BASE 0x0250 /* Extra LMMIO range */ -#define LBA_ELMMIO_MASK 0x0258 - -#define LBA_EIOS_BASE 0x0260 /* Extra I/O port space */ -#define LBA_EIOS_MASK 0x0268 - -#define LBA_GLOBAL_MASK 0x0270 /* Mercury only: Global Address Mask */ -#define LBA_DMA_CTL 0x0278 /* firmware sets this */ - -#define LBA_IBASE 0x0300 /* SBA DMA support */ -#define LBA_IMASK 0x0308 - -/* FIXME: ignore DMA Hint stuff until we can measure performance */ -#define LBA_HINT_CFG 0x0310 -#define LBA_HINT_BASE 0x0380 /* 14 registers at every 8 bytes. */ - -#define LBA_BUS_MODE 0x0620 - -/* ERROR regs are needed for config cycle kluges */ -#define LBA_ERROR_CONFIG 0x0680 -#define LBA_SMART_MODE 0x20 -#define LBA_ERROR_STATUS 0x0688 -#define LBA_ROPE_CTL 0x06A0 - -#define LBA_IOSAPIC_BASE 0x800 /* Offset of IRQ logic */ - /* non-postable I/O port space, densely packed */ #define LBA_PORT_BASE (PCI_F_EXTEND | 0xfee00000UL) -static void __iomem *astro_iop_base; - -#define ELROY_HVERS 0x782 -#define MERCURY_HVERS 0x783 -#define QUICKSILVER_HVERS 0x784 - -static inline int IS_ELROY(struct parisc_device *d) -{ - return (d->id.hversion == ELROY_HVERS); -} - -static inline int IS_MERCURY(struct parisc_device *d) -{ - return (d->id.hversion == MERCURY_HVERS); -} - -static inline int IS_QUICKSILVER(struct parisc_device *d) -{ - return (d->id.hversion == QUICKSILVER_HVERS); -} - - -/* -** lba_device: Per instance Elroy data structure -*/ -struct lba_device { - struct pci_hba_data hba; - - spinlock_t lba_lock; - void *iosapic_obj; - -#ifdef CONFIG_64BIT - void __iomem * iop_base; /* PA_VIEW - for IO port accessor funcs */ -#endif - - int flags; /* state/functionality enabled */ - int hw_rev; /* HW revision of chip */ -}; - +static void __iomem *astro_iop_base __read_mostly; static u32 lba_t32; @@ -271,7 +168,8 @@ lba_dump_res(struct resource *r, int d) printk(KERN_DEBUG "(%p)", r->parent); for (i = d; i ; --i) printk(" "); - printk(KERN_DEBUG "%p [%lx,%lx]/%lx\n", r, r->start, r->end, r->flags); + printk(KERN_DEBUG "%p [%lx,%lx]/%lx\n", r, + (long)r->start, (long)r->end, r->flags); lba_dump_res(r->child, d+2); lba_dump_res(r->sibling, d); } @@ -695,11 +593,71 @@ lba_claim_dev_resources(struct pci_dev *dev) } } } + + +/* + * truncate_pat_collision: Deal with overlaps or outright collisions + * between PAT PDC reported ranges. + * + * Broken PA8800 firmware will report lmmio range that + * overlaps with CPU HPA. Just truncate the lmmio range. + * + * BEWARE: conflicts with this lmmio range may be an + * elmmio range which is pointing down another rope. + * + * FIXME: only deals with one collision per range...theoretically we + * could have several. Supporting more than one collision will get messy. + */ +static unsigned long +truncate_pat_collision(struct resource *root, struct resource *new) +{ + unsigned long start = new->start; + unsigned long end = new->end; + struct resource *tmp = root->child; + + if (end <= start || start < root->start || !tmp) + return 0; + + /* find first overlap */ + while (tmp && tmp->end < start) + tmp = tmp->sibling; + + /* no entries overlap */ + if (!tmp) return 0; + + /* found one that starts behind the new one + ** Don't need to do anything. + */ + if (tmp->start >= end) return 0; + + if (tmp->start <= start) { + /* "front" of new one overlaps */ + new->start = tmp->end + 1; + + if (tmp->end >= end) { + /* AACCKK! totally overlaps! drop this range. */ + return 1; + } + } + + if (tmp->end < end ) { + /* "end" of new one overlaps */ + new->end = tmp->start - 1; + } + + printk(KERN_WARNING "LBA: Truncating lmmio_space [%lx/%lx] " + "to [%lx,%lx]\n", + start, end, + (long)new->start, (long)new->end ); + + return 0; /* truncation successful */ +} + #else -#define lba_claim_dev_resources(dev) +#define lba_claim_dev_resources(dev) do { } while (0) +#define truncate_pat_collision(r,n) (0) #endif - /* ** The algorithm is generic code. ** But it needs to access local data structures to get the IRQ base. @@ -747,6 +705,9 @@ 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) { err = request_resource(&iomem_resource, @@ -755,28 +716,40 @@ lba_fixup_bus(struct pci_bus *bus) printk("FAILED: lba_fixup_bus() request for " "elmmio_space [%lx/%lx]\n", - ldev->hba.elmmio_space.start, - ldev->hba.elmmio_space.end); + (long)ldev->hba.elmmio_space.start, + (long)ldev->hba.elmmio_space.end); /* lba_dump_res(&iomem_resource, 2); */ /* BUG(); */ - } + } else + bus->resource[i++] = &(ldev->hba.elmmio_space); } - err = request_resource(&iomem_resource, &(ldev->hba.lmmio_space)); - if (err < 0) { - /* FIXME overlaps with elmmio will fail here. - * Need to prune (or disable) the distributed range. - * - * BEWARE: conflicts with this lmmio range may be - * elmmio range which is pointing down another rope. - */ - - printk("FAILED: lba_fixup_bus() request for " + + /* 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 { + 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", - ldev->hba.lmmio_space.start, - ldev->hba.lmmio_space.end); - /* lba_dump_res(&iomem_resource, 2); */ + (long)ldev->hba.lmmio_space.start, + (long)ldev->hba.lmmio_space.end); + } else + bus->resource[i++] = &(ldev->hba.lmmio_space); } #ifdef CONFIG_64BIT @@ -786,23 +759,15 @@ lba_fixup_bus(struct pci_bus *bus) if (err < 0) { printk("FAILED: lba_fixup_bus() request for " "gmmio_space [%lx/%lx]\n", - ldev->hba.gmmio_space.start, - ldev->hba.gmmio_space.end); + (long)ldev->hba.gmmio_space.start, + (long)ldev->hba.gmmio_space.end); lba_dump_res(&iomem_resource, 2); BUG(); } + bus->resource[i++] = &(ldev->hba.gmmio_space); } #endif - /* advertize Host bridge resources to PCI bus */ - bus->resource[0] = &(ldev->hba.io_space); - bus->resource[1] = &(ldev->hba.lmmio_space); - i=2; - if (ldev->hba.elmmio_space.start) - bus->resource[i++] = &(ldev->hba.elmmio_space); - if (ldev->hba.gmmio_space.start) - bus->resource[i++] = &(ldev->hba.gmmio_space); - } list_for_each(ln, &bus->devices) { @@ -1016,7 +981,7 @@ LBA_PORT_IN(32, 0) #define LBA_PORT_OUT(size, mask) \ static void lba_pat_out##size (struct pci_hba_data *l, u16 addr, u##size val) \ { \ - void *where = (void *) PIOP_TO_GMMIO(LBA_DEV(l), addr); \ + void __iomem *where = PIOP_TO_GMMIO(LBA_DEV(l), addr); \ DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __FUNCTION__, l, addr, val); \ WRITE_REG##size(val, where); \ /* flush the I/O down to the elroy at least */ \ @@ -1099,16 +1064,16 @@ lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev) /* used to fix up pre-initialized MEM BARs */ if (!lba_dev->hba.lmmio_space.start) { sprintf(lba_dev->hba.lmmio_name, - "PCI%02lx LMMIO", - lba_dev->hba.bus_num.start); + "PCI%02x LMMIO", + (int)lba_dev->hba.bus_num.start); lba_dev->hba.lmmio_space_offset = p->start - io->start; r = &lba_dev->hba.lmmio_space; r->name = lba_dev->hba.lmmio_name; } else if (!lba_dev->hba.elmmio_space.start) { sprintf(lba_dev->hba.elmmio_name, - "PCI%02lx ELMMIO", - lba_dev->hba.bus_num.start); + "PCI%02x ELMMIO", + (int)lba_dev->hba.bus_num.start); r = &lba_dev->hba.elmmio_space; r->name = lba_dev->hba.elmmio_name; } else { @@ -1125,8 +1090,8 @@ lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev) case PAT_GMMIO: /* MMIO space > 4GB phys addr; for 64-bit BAR */ - sprintf(lba_dev->hba.gmmio_name, "PCI%02lx GMMIO", - lba_dev->hba.bus_num.start); + sprintf(lba_dev->hba.gmmio_name, "PCI%02x GMMIO", + (int)lba_dev->hba.bus_num.start); r = &lba_dev->hba.gmmio_space; r->name = lba_dev->hba.gmmio_name; r->start = p->start; @@ -1146,10 +1111,10 @@ lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev) ** Postable I/O port space is per PCI host adapter. ** base of 64MB PIOP region */ - lba_dev->iop_base = ioremap(p->start, 64 * 1024 * 1024); + lba_dev->iop_base = ioremap_nocache(p->start, 64 * 1024 * 1024); - sprintf(lba_dev->hba.io_name, "PCI%02lx Ports", - lba_dev->hba.bus_num.start); + sprintf(lba_dev->hba.io_name, "PCI%02x Ports", + (int)lba_dev->hba.bus_num.start); r = &lba_dev->hba.io_space; r->name = lba_dev->hba.io_name; r->start = HBA_PORT_BASE(lba_dev->hba.hba_num); @@ -1202,8 +1167,8 @@ lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev) ** Legacy boxes but it's nice to see in /proc/iomem. */ r = &(lba_dev->hba.lmmio_space); - sprintf(lba_dev->hba.lmmio_name, "PCI%02lx LMMIO", - lba_dev->hba.bus_num.start); + sprintf(lba_dev->hba.lmmio_name, "PCI%02x LMMIO", + (int)lba_dev->hba.bus_num.start); r->name = lba_dev->hba.lmmio_name; #if 1 @@ -1311,8 +1276,8 @@ lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev) ** an existing (but unused portion of) distributed range. */ r = &(lba_dev->hba.elmmio_space); - sprintf(lba_dev->hba.elmmio_name, "PCI%02lx ELMMIO", - lba_dev->hba.bus_num.start); + sprintf(lba_dev->hba.elmmio_name, "PCI%02x ELMMIO", + (int)lba_dev->hba.bus_num.start); r->name = lba_dev->hba.elmmio_name; #if 1 @@ -1333,8 +1298,8 @@ lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev) #endif r = &(lba_dev->hba.io_space); - sprintf(lba_dev->hba.io_name, "PCI%02lx Ports", - lba_dev->hba.bus_num.start); + sprintf(lba_dev->hba.io_name, "PCI%02x Ports", + (int)lba_dev->hba.bus_num.start); r->name = lba_dev->hba.io_name; r->flags = IORESOURCE_IO; r->start = READ_REG32(lba_dev->hba.base_addr + LBA_IOS_BASE) & ~1L; @@ -1442,13 +1407,20 @@ lba_hw_init(struct lba_device *d) return 0; } - +/* + * Unfortunately, when firmware numbers busses, it doesn't take into account + * Cardbus bridges. So we have to renumber the busses to suit ourselves. + * Elroy/Mercury don't actually know what bus number they're attached to; + * we use bus 0 to indicate the directly attached bus and any other bus + * number will be taken care of by the PCI-PCI bridge. + */ +static unsigned int lba_next_bus = 0; /* -** Determine if lba should claim this chip (return 0) or not (return 1). -** If so, initialize the chip and tell other partners in crime they -** have work to do. -*/ + * Determine if lba should claim this chip (return 0) or not (return 1). + * If so, initialize the chip and tell other partners in crime they + * have work to do. + */ static int __init lba_driver_probe(struct parisc_device *dev) { @@ -1458,7 +1430,7 @@ lba_driver_probe(struct parisc_device *dev) u32 func_class; void *tmp_obj; char *version; - void __iomem *addr = ioremap(dev->hpa.start, 4096); + void __iomem *addr = ioremap_nocache(dev->hpa.start, 4096); /* Read HW Rev First */ func_class = READ_REG32(addr + LBA_FCLASS); @@ -1475,8 +1447,8 @@ lba_driver_probe(struct parisc_device *dev) default: version = "TR4+"; } - printk(KERN_INFO "%s version %s (0x%x) found at 0x%lx\n", - MODULE_NAME, version, func_class & 0xf, dev->hpa.start); + printk(KERN_INFO "Elroy version %s (0x%x) found at 0x%lx\n", + version, func_class & 0xf, (long)dev->hpa.start); if (func_class < 2) { printk(KERN_WARNING "Can't support LBA older than " @@ -1496,37 +1468,38 @@ lba_driver_probe(struct parisc_device *dev) } } else if (IS_MERCURY(dev) || IS_QUICKSILVER(dev)) { + int major, minor; + func_class &= 0xff; - version = kmalloc(6, GFP_KERNEL); - sprintf(version,"TR%d.%d",(func_class >> 4),(func_class & 0xf)); + major = func_class >> 4, minor = func_class & 0xf; + /* We could use one printk for both Elroy and Mercury, * but for the mask for func_class. */ - printk(KERN_INFO "%s version %s (0x%x) found at 0x%lx\n", - MODULE_NAME, version, func_class & 0xff, dev->hpa.start); + printk(KERN_INFO "%s version TR%d.%d (0x%x) found at 0x%lx\n", + IS_MERCURY(dev) ? "Mercury" : "Quicksilver", major, + minor, func_class, (long)dev->hpa.start); + cfg_ops = &mercury_cfg_ops; } else { - printk(KERN_ERR "Unknown LBA found at 0x%lx\n", dev->hpa.start); + printk(KERN_ERR "Unknown LBA found at 0x%lx\n", + (long)dev->hpa.start); return -ENODEV; } - /* - ** Tell I/O SAPIC driver we have a IRQ handler/region. - */ + /* Tell I/O SAPIC driver we have a IRQ handler/region. */ tmp_obj = iosapic_register(dev->hpa.start + LBA_IOSAPIC_BASE); /* NOTE: PCI devices (e.g. 103c:1005 graphics card) which don't ** have an IRT entry will get NULL back from iosapic code. */ - lba_dev = kmalloc(sizeof(struct lba_device), GFP_KERNEL); + lba_dev = kzalloc(sizeof(struct lba_device), GFP_KERNEL); if (!lba_dev) { printk(KERN_ERR "lba_init_chip - couldn't alloc lba_device\n"); return(1); } - memset(lba_dev, 0, sizeof(struct lba_device)); - /* ---------- First : initialize data we already have --------- */ @@ -1535,6 +1508,7 @@ lba_driver_probe(struct parisc_device *dev) lba_dev->hba.dev = dev; lba_dev->iosapic_obj = tmp_obj; /* save interrupt handle */ lba_dev->hba.iommu = sba_get_iommu(dev); /* get iommu data */ + parisc_set_drvdata(dev, lba_dev); /* ------------ Second : initialize common stuff ---------- */ pci_bios = &lba_bios_ops; @@ -1554,7 +1528,7 @@ lba_driver_probe(struct parisc_device *dev) } else { if (!astro_iop_base) { /* Sprockets PDC uses NPIOP region */ - astro_iop_base = ioremap(LBA_PORT_BASE, 64 * 1024); + astro_iop_base = ioremap_nocache(LBA_PORT_BASE, 64 * 1024); pci_port = &lba_astro_port_ops; } @@ -1562,16 +1536,17 @@ lba_driver_probe(struct parisc_device *dev) lba_legacy_resources(dev, lba_dev); } - /* - ** Tell PCI support another PCI bus was found. - ** Walks PCI bus for us too. - */ + if (lba_dev->hba.bus_num.start < lba_next_bus) + lba_dev->hba.bus_num.start = lba_next_bus; + 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); - if (lba_bus) + if (lba_bus) { + lba_next_bus = lba_bus->subordinate + 1; pci_bus_add_devices(lba_bus); + } /* This is in lieu of calling pci_assign_unassigned_resources() */ if (is_pdc_pat()) { @@ -1635,7 +1610,7 @@ void __init lba_init(void) */ void lba_set_iregs(struct parisc_device *lba, u32 ibase, u32 imask) { - void __iomem * base_addr = ioremap(lba->hpa.start, 4096); + void __iomem * base_addr = ioremap_nocache(lba->hpa.start, 4096); imask <<= 2; /* adjust for hints - 2 more bits */