X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Fparisc%2Flba_pci.c;h=ba6769934c771718035f8ed35c2a99c89021afce;hb=4f2e639af4bd5e152fc79256e333643d3dd6c10f;hp=5e495dcbc58a5c61659425d50d675a4cd38563f5;hpb=1ef43204f4bd24dcd3156185b19b31b6b4151ae9;p=powerpc.git diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c index 5e495dcbc5..ba6769934c 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; @@ -695,11 +592,71 @@ 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, + new->start, 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 +704,9 @@ 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, @@ -760,23 +720,35 @@ lba_fixup_bus(struct pci_bus *bus) /* 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", + ldev->hba.lmmio_space.start, + 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); */ + } else + bus->resource[i++] = &(ldev->hba.lmmio_space); } #ifdef CONFIG_64BIT @@ -791,18 +763,10 @@ lba_fixup_bus(struct pci_bus *bus) 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) { @@ -1146,7 +1110,7 @@ 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); @@ -1458,7 +1422,7 @@ 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 +1439,8 @@ 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, dev->hpa.start); if (func_class < 2) { printk(KERN_WARNING "Can't support LBA older than " @@ -1496,14 +1460,18 @@ 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, dev->hpa.start); + cfg_ops = &mercury_cfg_ops; } else { printk(KERN_ERR "Unknown LBA found at 0x%lx\n", dev->hpa.start); @@ -1519,14 +1487,12 @@ lba_driver_probe(struct parisc_device *dev) ** 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 +1501,7 @@ 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 +1521,7 @@ 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; } @@ -1635,7 +1602,7 @@ 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 */