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Diffstat (limited to 'drivers/parisc/lba_pci.c')
| -rw-r--r-- | drivers/parisc/lba_pci.c | 1651 |
1 files changed, 1651 insertions, 0 deletions
diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c new file mode 100644 index 000000000..dceb9ddfd --- /dev/null +++ b/drivers/parisc/lba_pci.c @@ -0,0 +1,1651 @@ +/* +** +** PCI Lower Bus Adapter (LBA) manager +** +** (c) Copyright 1999,2000 Grant Grundler +** (c) Copyright 1999,2000 Hewlett-Packard Company +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License as published by +** the Free Software Foundation; either version 2 of the License, or +** (at your option) any later version. +** +** +** This module primarily provides access to PCI bus (config/IOport +** spaces) on platforms with an SBA/LBA chipset. A/B/C/J/L/N-class +** with 4 digit model numbers - eg C3000 (and A400...sigh). +** +** LBA driver isn't as simple as the Dino driver because: +** (a) this chip has substantial bug fixes between revisions +** (Only one Dino bug has a software workaround :^( ) +** (b) has more options which we don't (yet) support (DMA hints, OLARD) +** (c) IRQ support lives in the I/O SAPIC driver (not with PCI driver) +** (d) play nicely with both PAT and "Legacy" PA-RISC firmware (PDC). +** (dino only deals with "Legacy" PDC) +** +** LBA driver passes the I/O SAPIC HPA to the I/O SAPIC driver. +** (I/O SAPIC is integratd in the LBA chip). +** +** FIXME: Add support to SBA and LBA drivers for DMA hint sets +** FIXME: Add support for PCI card hot-plug (OLARD). +*/ + +#include <linux/delay.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/spinlock.h> +#include <linux/init.h> /* for __init */ +#include <linux/pci.h> +#include <linux/ioport.h> +#include <linux/slab.h> + +#include <asm/byteorder.h> +#include <asm/pdc.h> +#include <asm/pdcpat.h> +#include <asm/page.h> + +#include <asm/ropes.h> +#include <asm/hardware.h> /* for register_parisc_driver() stuff */ +#include <asm/parisc-device.h> +#include <asm/io.h> /* read/write stuff */ + +#undef DEBUG_LBA /* general stuff */ +#undef DEBUG_LBA_PORT /* debug I/O Port access */ +#undef DEBUG_LBA_CFG /* debug Config Space Access (ie PCI Bus walk) */ +#undef DEBUG_LBA_PAT /* debug PCI Resource Mgt code - PDC PAT only */ + +#undef FBB_SUPPORT /* Fast Back-Back xfers - NOT READY YET */ + + +#ifdef DEBUG_LBA +#define DBG(x...) printk(x) +#else +#define DBG(x...) +#endif + +#ifdef DEBUG_LBA_PORT +#define DBG_PORT(x...) printk(x) +#else +#define DBG_PORT(x...) +#endif + +#ifdef DEBUG_LBA_CFG +#define DBG_CFG(x...) printk(x) +#else +#define DBG_CFG(x...) +#endif + +#ifdef DEBUG_LBA_PAT +#define DBG_PAT(x...) printk(x) +#else +#define DBG_PAT(x...) +#endif + + +/* +** Config accessor functions only pass in the 8-bit bus number and not +** the 8-bit "PCI Segment" number. Each LBA will be assigned a PCI bus +** number based on what firmware wrote into the scratch register. +** +** The "secondary" bus number is set to this before calling +** pci_register_ops(). If any PPB's are present, the scan will +** discover them and update the "secondary" and "subordinate" +** fields in the pci_bus structure. +** +** Changes in the configuration *may* result in a different +** bus number for each LBA depending on what firmware does. +*/ + +#define MODULE_NAME "LBA" + +/* non-postable I/O port space, densely packed */ +#define LBA_PORT_BASE (PCI_F_EXTEND | 0xfee00000UL) +static void __iomem *astro_iop_base __read_mostly; + +static u32 lba_t32; + +/* lba flags */ +#define LBA_FLAG_SKIP_PROBE 0x10 + +#define LBA_SKIP_PROBE(d) ((d)->flags & LBA_FLAG_SKIP_PROBE) + + +/* Looks nice and keeps the compiler happy */ +#define LBA_DEV(d) ((struct lba_device *) (d)) + + +/* +** Only allow 8 subsidiary busses per LBA +** Problem is the PCI bus numbering is globally shared. +*/ +#define LBA_MAX_NUM_BUSES 8 + +/************************************ + * LBA register read and write support + * + * BE WARNED: register writes are posted. + * (ie follow writes which must reach HW with a read) + */ +#define READ_U8(addr) __raw_readb(addr) +#define READ_U16(addr) __raw_readw(addr) +#define READ_U32(addr) __raw_readl(addr) +#define WRITE_U8(value, addr) __raw_writeb(value, addr) +#define WRITE_U16(value, addr) __raw_writew(value, addr) +#define WRITE_U32(value, addr) __raw_writel(value, addr) + +#define READ_REG8(addr) readb(addr) +#define READ_REG16(addr) readw(addr) +#define READ_REG32(addr) readl(addr) +#define READ_REG64(addr) readq(addr) +#define WRITE_REG8(value, addr) writeb(value, addr) +#define WRITE_REG16(value, addr) writew(value, addr) +#define WRITE_REG32(value, addr) writel(value, addr) + + +#define LBA_CFG_TOK(bus,dfn) ((u32) ((bus)<<16 | (dfn)<<8)) +#define LBA_CFG_BUS(tok) ((u8) ((tok)>>16)) +#define LBA_CFG_DEV(tok) ((u8) ((tok)>>11) & 0x1f) +#define LBA_CFG_FUNC(tok) ((u8) ((tok)>>8 ) & 0x7) + + +/* +** Extract LBA (Rope) number from HPA +** REVISIT: 16 ropes for Stretch/Ike? +*/ +#define ROPES_PER_IOC 8 +#define LBA_NUM(x) ((((unsigned long) x) >> 13) & (ROPES_PER_IOC-1)) + + +static void +lba_dump_res(struct resource *r, int d) +{ + int i; + + if (NULL == r) + return; + + printk(KERN_DEBUG "(%p)", r->parent); + for (i = d; i ; --i) printk(" "); + 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); +} + + +/* +** LBA rev 2.0, 2.1, 2.2, and 3.0 bus walks require a complex +** workaround for cfg cycles: +** -- preserve LBA state +** -- prevent any DMA from occurring +** -- turn on smart mode +** -- probe with config writes before doing config reads +** -- check ERROR_STATUS +** -- clear ERROR_STATUS +** -- restore LBA state +** +** The workaround is only used for device discovery. +*/ + +static int lba_device_present(u8 bus, u8 dfn, struct lba_device *d) +{ + 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) || + ((bus - first_bus) >= LBA_MAX_NUM_BUSES)) { + return 0; + } + + return 1; +} + + + +#define LBA_CFG_SETUP(d, tok) { \ + /* Save contents of error config register. */ \ + error_config = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG); \ +\ + /* Save contents of status control register. */ \ + status_control = READ_REG32(d->hba.base_addr + LBA_STAT_CTL); \ +\ + /* For LBA rev 2.0, 2.1, 2.2, and 3.0, we must disable DMA \ + ** arbitration for full bus walks. \ + */ \ + /* Save contents of arb mask register. */ \ + arb_mask = READ_REG32(d->hba.base_addr + LBA_ARB_MASK); \ +\ + /* \ + * Turn off all device arbitration bits (i.e. everything \ + * except arbitration enable bit). \ + */ \ + WRITE_REG32(0x1, d->hba.base_addr + LBA_ARB_MASK); \ +\ + /* \ + * Set the smart mode bit so that master aborts don't cause \ + * LBA to go into PCI fatal mode (required). \ + */ \ + WRITE_REG32(error_config | LBA_SMART_MODE, d->hba.base_addr + LBA_ERROR_CONFIG); \ +} + + +#define LBA_CFG_PROBE(d, tok) { \ + /* \ + * Setup Vendor ID write and read back the address register \ + * to make sure that LBA is the bus master. \ + */ \ + WRITE_REG32(tok | PCI_VENDOR_ID, (d)->hba.base_addr + LBA_PCI_CFG_ADDR);\ + /* \ + * Read address register to ensure that LBA is the bus master, \ + * which implies that DMA traffic has stopped when DMA arb is off. \ + */ \ + lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \ + /* \ + * Generate a cfg write cycle (will have no affect on \ + * Vendor ID register since read-only). \ + */ \ + WRITE_REG32(~0, (d)->hba.base_addr + LBA_PCI_CFG_DATA); \ + /* \ + * Make sure write has completed before proceeding further, \ + * i.e. before setting clear enable. \ + */ \ + lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \ +} + + +/* + * HPREVISIT: + * -- Can't tell if config cycle got the error. + * + * OV bit is broken until rev 4.0, so can't use OV bit and + * LBA_ERROR_LOG_ADDR to tell if error belongs to config cycle. + * + * As of rev 4.0, no longer need the error check. + * + * -- Even if we could tell, we still want to return -1 + * for **ANY** error (not just master abort). + * + * -- Only clear non-fatal errors (we don't want to bring + * LBA out of pci-fatal mode). + * + * Actually, there is still a race in which + * we could be clearing a fatal error. We will + * live with this during our initial bus walk + * until rev 4.0 (no driver activity during + * initial bus walk). The initial bus walk + * has race conditions concerning the use of + * smart mode as well. + */ + +#define LBA_MASTER_ABORT_ERROR 0xc +#define LBA_FATAL_ERROR 0x10 + +#define LBA_CFG_MASTER_ABORT_CHECK(d, base, tok, error) { \ + u32 error_status = 0; \ + /* \ + * Set clear enable (CE) bit. Unset by HW when new \ + * errors are logged -- LBA HW ERS section 14.3.3). \ + */ \ + WRITE_REG32(status_control | CLEAR_ERRLOG_ENABLE, base + LBA_STAT_CTL); \ + error_status = READ_REG32(base + LBA_ERROR_STATUS); \ + if ((error_status & 0x1f) != 0) { \ + /* \ + * Fail the config read request. \ + */ \ + error = 1; \ + if ((error_status & LBA_FATAL_ERROR) == 0) { \ + /* \ + * Clear error status (if fatal bit not set) by setting \ + * clear error log bit (CL). \ + */ \ + WRITE_REG32(status_control | CLEAR_ERRLOG, base + LBA_STAT_CTL); \ + } \ + } \ +} + +#define LBA_CFG_TR4_ADDR_SETUP(d, addr) \ + WRITE_REG32(((addr) & ~3), (d)->hba.base_addr + LBA_PCI_CFG_ADDR); + +#define LBA_CFG_ADDR_SETUP(d, addr) { \ + WRITE_REG32(((addr) & ~3), (d)->hba.base_addr + LBA_PCI_CFG_ADDR); \ + /* \ + * Read address register to ensure that LBA is the bus master, \ + * which implies that DMA traffic has stopped when DMA arb is off. \ + */ \ + lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \ +} + + +#define LBA_CFG_RESTORE(d, base) { \ + /* \ + * Restore status control register (turn off clear enable). \ + */ \ + WRITE_REG32(status_control, base + LBA_STAT_CTL); \ + /* \ + * Restore error config register (turn off smart mode). \ + */ \ + WRITE_REG32(error_config, base + LBA_ERROR_CONFIG); \ + /* \ + * Restore arb mask register (reenables DMA arbitration). \ + */ \ + WRITE_REG32(arb_mask, base + LBA_ARB_MASK); \ +} + + + +static unsigned int +lba_rd_cfg(struct lba_device *d, u32 tok, u8 reg, u32 size) +{ + u32 data = ~0U; + int error = 0; + u32 arb_mask = 0; /* used by LBA_CFG_SETUP/RESTORE */ + u32 error_config = 0; /* used by LBA_CFG_SETUP/RESTORE */ + u32 status_control = 0; /* used by LBA_CFG_SETUP/RESTORE */ + + LBA_CFG_SETUP(d, tok); + LBA_CFG_PROBE(d, tok); + LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error); + if (!error) { + void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA; + + LBA_CFG_ADDR_SETUP(d, tok | reg); + switch (size) { + case 1: data = (u32) READ_REG8(data_reg + (reg & 3)); break; + case 2: data = (u32) READ_REG16(data_reg+ (reg & 2)); break; + case 4: data = READ_REG32(data_reg); break; + } + } + LBA_CFG_RESTORE(d, d->hba.base_addr); + return(data); +} + + +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->busn_res.start; + u32 tok = LBA_CFG_TOK(local_bus, devfn); + void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA; + + if ((pos > 255) || (devfn > 255)) + return -EINVAL; + +/* FIXME: B2K/C3600 workaround is always use old method... */ + /* if (!LBA_SKIP_PROBE(d)) */ { + /* original - Generate config cycle on broken elroy + with risk we will miss PCI bus errors. */ + *data = lba_rd_cfg(d, tok, pos, size); + DBG_CFG("%s(%x+%2x) -> 0x%x (a)\n", __func__, tok, pos, *data); + return 0; + } + + 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; + return(0); + } + + /* Basic Algorithm + ** Should only get here on fully working LBA rev. + ** This is how simple the code should have been. + */ + LBA_CFG_ADDR_SETUP(d, tok | pos); + switch(size) { + case 1: *data = READ_REG8 (data_reg + (pos & 3)); break; + case 2: *data = READ_REG16(data_reg + (pos & 2)); break; + case 4: *data = READ_REG32(data_reg); break; + } + DBG_CFG("%s(%x+%2x) -> 0x%x (c)\n", __func__, tok, pos, *data); + return 0; +} + + +static void +lba_wr_cfg(struct lba_device *d, u32 tok, u8 reg, u32 data, u32 size) +{ + int error = 0; + u32 arb_mask = 0; + u32 error_config = 0; + u32 status_control = 0; + void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA; + + LBA_CFG_SETUP(d, tok); + LBA_CFG_ADDR_SETUP(d, tok | reg); + switch (size) { + case 1: WRITE_REG8 (data, data_reg + (reg & 3)); break; + case 2: WRITE_REG16(data, data_reg + (reg & 2)); break; + case 4: WRITE_REG32(data, data_reg); break; + } + LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error); + LBA_CFG_RESTORE(d, d->hba.base_addr); +} + + +/* + * LBA 4.0 config write code implements non-postable semantics + * by doing a read of CONFIG ADDR after the write. + */ + +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->busn_res.start; + u32 tok = LBA_CFG_TOK(local_bus,devfn); + + if ((pos > 255) || (devfn > 255)) + return -EINVAL; + + if (!LBA_SKIP_PROBE(d)) { + /* Original Workaround */ + lba_wr_cfg(d, tok, pos, (u32) data, size); + DBG_CFG("%s(%x+%2x) = 0x%x (a)\n", __func__, tok, pos,data); + return 0; + } + + 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 */ + } + + DBG_CFG("%s(%x+%2x) = 0x%x (c)\n", __func__, tok, pos, data); + + /* Basic Algorithm */ + LBA_CFG_ADDR_SETUP(d, tok | pos); + switch(size) { + case 1: WRITE_REG8 (data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 3)); + break; + case 2: WRITE_REG16(data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 2)); + break; + case 4: WRITE_REG32(data, d->hba.base_addr + LBA_PCI_CFG_DATA); + break; + } + /* flush posted write */ + lba_t32 = READ_REG32(d->hba.base_addr + LBA_PCI_CFG_ADDR); + return 0; +} + + +static struct pci_ops elroy_cfg_ops = { + .read = elroy_cfg_read, + .write = elroy_cfg_write, +}; + +/* + * The mercury_cfg_ops are slightly misnamed; they're also used for Elroy + * TR4.0 as no additional bugs were found in this areea between Elroy and + * Mercury + */ + +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->busn_res.start; + u32 tok = LBA_CFG_TOK(local_bus, devfn); + void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA; + + if ((pos > 255) || (devfn > 255)) + return -EINVAL; + + LBA_CFG_TR4_ADDR_SETUP(d, tok | pos); + switch(size) { + case 1: + *data = READ_REG8(data_reg + (pos & 3)); + break; + case 2: + *data = READ_REG16(data_reg + (pos & 2)); + break; + case 4: + *data = READ_REG32(data_reg); break; + break; + } + + DBG_CFG("mercury_cfg_read(%x+%2x) -> 0x%x\n", tok, pos, *data); + return 0; +} + +/* + * LBA 4.0 config write code implements non-postable semantics + * by doing a read of CONFIG ADDR after the write. + */ + +static int mercury_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)); + void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA; + u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start; + u32 tok = LBA_CFG_TOK(local_bus,devfn); + + if ((pos > 255) || (devfn > 255)) + return -EINVAL; + + DBG_CFG("%s(%x+%2x) <- 0x%x (c)\n", __func__, tok, pos, data); + + LBA_CFG_TR4_ADDR_SETUP(d, tok | pos); + switch(size) { + case 1: + WRITE_REG8 (data, data_reg + (pos & 3)); + break; + case 2: + WRITE_REG16(data, data_reg + (pos & 2)); + break; + case 4: + WRITE_REG32(data, data_reg); + break; + } + + /* flush posted write */ + lba_t32 = READ_U32(d->hba.base_addr + LBA_PCI_CFG_ADDR); + return 0; +} + +static struct pci_ops mercury_cfg_ops = { + .read = mercury_cfg_read, + .write = mercury_cfg_write, +}; + + +static void +lba_bios_init(void) +{ + DBG(MODULE_NAME ": lba_bios_init\n"); +} + + +#ifdef CONFIG_64BIT + +/* + * 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 */ +} + +/* + * 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 + +/* +** The algorithm is generic code. +** But it needs to access local data structures to get the IRQ base. +** Could make this a "pci_fixup_irq(bus, region)" but not sure +** it's worth it. +** +** Called by do_pci_scan_bus() immediately after each PCI bus is walked. +** Resources aren't allocated until recursive buswalk below HBA is completed. +*/ +static void +lba_fixup_bus(struct pci_bus *bus) +{ + struct pci_dev *dev; +#ifdef FBB_SUPPORT + u16 status; +#endif + struct lba_device *ldev = LBA_DEV(parisc_walk_tree(bus->bridge)); + + DBG("lba_fixup_bus(0x%p) bus %d platform_data 0x%p\n", + bus, (int)bus->busn_res.start, bus->bridge->platform_data); + + /* + ** Properly Setup MMIO resources for this bus. + ** pci_alloc_primary_bus() mangles this. + */ + if (bus->parent) { + int i; + /* PCI-PCI Bridge */ + pci_read_bridge_bases(bus); + for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) + pci_claim_bridge_resource(bus->self, i); + } else { + /* Host-PCI Bridge */ + int err; + + DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n", + ldev->hba.io_space.name, + ldev->hba.io_space.start, ldev->hba.io_space.end, + ldev->hba.io_space.flags); + DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n", + ldev->hba.lmmio_space.name, + ldev->hba.lmmio_space.start, ldev->hba.lmmio_space.end, + ldev->hba.lmmio_space.flags); + + err = request_resource(&ioport_resource, &(ldev->hba.io_space)); + if (err < 0) { + lba_dump_res(&ioport_resource, 2); + BUG(); + } + + if (ldev->hba.elmmio_space.flags) { + err = request_resource(&iomem_resource, + &(ldev->hba.elmmio_space)); + if (err < 0) { + + printk("FAILED: lba_fixup_bus() request for " + "elmmio_space [%lx/%lx]\n", + (long)ldev->hba.elmmio_space.start, + (long)ldev->hba.elmmio_space.end); + + /* lba_dump_res(&iomem_resource, 2); */ + /* BUG(); */ + } + } + + 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); + } + } + +#ifdef CONFIG_64BIT + /* GMMIO is distributed range. Every LBA/Rope gets part it. */ + if (ldev->hba.gmmio_space.flags) { + err = request_resource(&iomem_resource, &(ldev->hba.gmmio_space)); + if (err < 0) { + printk("FAILED: lba_fixup_bus() request for " + "gmmio_space [%lx/%lx]\n", + (long)ldev->hba.gmmio_space.start, + (long)ldev->hba.gmmio_space.end); + lba_dump_res(&iomem_resource, 2); + BUG(); + } + } +#endif + + } + + list_for_each_entry(dev, &bus->devices, bus_list) { + int i; + + DBG("lba_fixup_bus() %s\n", pci_name(dev)); + + /* Virtualize Device/Bridge Resources. */ + for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) { + struct resource *res = &dev->resource[i]; + + /* If resource not allocated - skip it */ + if (!res->start) + continue; + + /* + ** FIXME: this will result in whinging for devices + ** that share expansion ROMs (think quad tulip), but + ** isn't harmful. + */ + pci_claim_resource(dev, i); + } + +#ifdef FBB_SUPPORT + /* + ** If one device does not support FBB transfers, + ** No one on the bus can be allowed to use them. + */ + (void) pci_read_config_word(dev, PCI_STATUS, &status); + bus->bridge_ctl &= ~(status & PCI_STATUS_FAST_BACK); +#endif + + /* + ** P2PB's have no IRQs. ignore them. + */ + if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) + continue; + + /* Adjust INTERRUPT_LINE for this dev */ + iosapic_fixup_irq(ldev->iosapic_obj, dev); + } + +#ifdef FBB_SUPPORT +/* FIXME/REVISIT - finish figuring out to set FBB on both +** pci_setup_bridge() clobbers PCI_BRIDGE_CONTROL. +** Can't fixup here anyway....garr... +*/ + if (fbb_enable) { + if (bus->parent) { + u8 control; + /* enable on PPB */ + (void) pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &control); + (void) pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, control | PCI_STATUS_FAST_BACK); + + } else { + /* enable on LBA */ + } + fbb_enable = PCI_COMMAND_FAST_BACK; + } + + /* Lastly enable FBB/PERR/SERR on all devices too */ + 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); + } +#endif +} + + +static struct pci_bios_ops lba_bios_ops = { + .init = lba_bios_init, + .fixup_bus = lba_fixup_bus, +}; + + + + +/******************************************************* +** +** LBA Sprockets "I/O Port" Space Accessor Functions +** +** This set of accessor functions is intended for use with +** "legacy firmware" (ie Sprockets on Allegro/Forte boxes). +** +** Many PCI devices don't require use of I/O port space (eg Tulip, +** NCR720) since they export the same registers to both MMIO and +** I/O port space. In general I/O port space is slower than +** MMIO since drivers are designed so PIO writes can be posted. +** +********************************************************/ + +#define LBA_PORT_IN(size, mask) \ +static u##size lba_astro_in##size (struct pci_hba_data *d, u16 addr) \ +{ \ + u##size t; \ + t = READ_REG##size(astro_iop_base + addr); \ + DBG_PORT(" 0x%x\n", t); \ + return (t); \ +} + +LBA_PORT_IN( 8, 3) +LBA_PORT_IN(16, 2) +LBA_PORT_IN(32, 0) + + + +/* +** BUG X4107: Ordering broken - DMA RD return can bypass PIO WR +** +** Fixed in Elroy 2.2. The READ_U32(..., LBA_FUNC_ID) below is +** guarantee non-postable completion semantics - not avoid X4107. +** The READ_U32 only guarantees the write data gets to elroy but +** out to the PCI bus. We can't read stuff from I/O port space +** since we don't know what has side-effects. Attempting to read +** from configuration space would be suicidal given the number of +** bugs in that elroy functionality. +** +** Description: +** DMA read results can improperly pass PIO writes (X4107). The +** result of this bug is that if a processor modifies a location in +** memory after having issued PIO writes, the PIO writes are not +** guaranteed to be completed before a PCI device is allowed to see +** the modified data in a DMA read. +** +** Note that IKE bug X3719 in TR1 IKEs will result in the same +** symptom. +** +** Workaround: +** The workaround for this bug is to always follow a PIO write with +** a PIO read to the same bus before starting DMA on that PCI bus. +** +*/ +#define LBA_PORT_OUT(size, mask) \ +static void lba_astro_out##size (struct pci_hba_data *d, u16 addr, u##size val) \ +{ \ + DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __func__, d, addr, val); \ + WRITE_REG##size(val, astro_iop_base + addr); \ + if (LBA_DEV(d)->hw_rev < 3) \ + lba_t32 = READ_U32(d->base_addr + LBA_FUNC_ID); \ +} + +LBA_PORT_OUT( 8, 3) +LBA_PORT_OUT(16, 2) +LBA_PORT_OUT(32, 0) + + +static struct pci_port_ops lba_astro_port_ops = { + .inb = lba_astro_in8, + .inw = lba_astro_in16, + .inl = lba_astro_in32, + .outb = lba_astro_out8, + .outw = lba_astro_out16, + .outl = lba_astro_out32 +}; + + +#ifdef CONFIG_64BIT +#define PIOP_TO_GMMIO(lba, addr) \ + ((lba)->iop_base + (((addr)&0xFFFC)<<10) + ((addr)&3)) + +/******************************************************* +** +** LBA PAT "I/O Port" Space Accessor Functions +** +** This set of accessor functions is intended for use with +** "PAT PDC" firmware (ie Prelude/Rhapsody/Piranha boxes). +** +** This uses the PIOP space located in the first 64MB of GMMIO. +** Each rope gets a full 64*KB* (ie 4 bytes per page) this way. +** bits 1:0 stay the same. bits 15:2 become 25:12. +** Then add the base and we can generate an I/O Port cycle. +********************************************************/ +#undef LBA_PORT_IN +#define LBA_PORT_IN(size, mask) \ +static u##size lba_pat_in##size (struct pci_hba_data *l, u16 addr) \ +{ \ + u##size t; \ + DBG_PORT("%s(0x%p, 0x%x) ->", __func__, l, addr); \ + t = READ_REG##size(PIOP_TO_GMMIO(LBA_DEV(l), addr)); \ + DBG_PORT(" 0x%x\n", t); \ + return (t); \ +} + +LBA_PORT_IN( 8, 3) +LBA_PORT_IN(16, 2) +LBA_PORT_IN(32, 0) + + +#undef LBA_PORT_OUT +#define LBA_PORT_OUT(size, mask) \ +static void lba_pat_out##size (struct pci_hba_data *l, u16 addr, u##size val) \ +{ \ + void __iomem *where = PIOP_TO_GMMIO(LBA_DEV(l), addr); \ + DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __func__, l, addr, val); \ + WRITE_REG##size(val, where); \ + /* flush the I/O down to the elroy at least */ \ + lba_t32 = READ_U32(l->base_addr + LBA_FUNC_ID); \ +} + +LBA_PORT_OUT( 8, 3) +LBA_PORT_OUT(16, 2) +LBA_PORT_OUT(32, 0) + + +static struct pci_port_ops lba_pat_port_ops = { + .inb = lba_pat_in8, + .inw = lba_pat_in16, + .inl = lba_pat_in32, + .outb = lba_pat_out8, + .outw = lba_pat_out16, + .outl = lba_pat_out32 +}; + + + +/* +** make range information from PDC available to PCI subsystem. +** We make the PDC call here in order to get the PCI bus range +** numbers. The rest will get forwarded in pcibios_fixup_bus(). +** We don't have a struct pci_bus assigned to us yet. +*/ +static void +lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev) +{ + unsigned long bytecnt; + long io_count; + long status; /* PDC return status */ + long pa_count; + pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; /* PA_VIEW */ + pdc_pat_cell_mod_maddr_block_t *io_pdc_cell; /* IO_VIEW */ + int i; + + pa_pdc_cell = kzalloc(sizeof(pdc_pat_cell_mod_maddr_block_t), GFP_KERNEL); + if (!pa_pdc_cell) + return; + + io_pdc_cell = kzalloc(sizeof(pdc_pat_cell_mod_maddr_block_t), GFP_KERNEL); + if (!io_pdc_cell) { + kfree(pa_pdc_cell); + return; + } + + /* return cell module (IO view) */ + status = pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index, + PA_VIEW, pa_pdc_cell); + pa_count = pa_pdc_cell->mod[1]; + + status |= pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index, + IO_VIEW, io_pdc_cell); + io_count = io_pdc_cell->mod[1]; + + /* We've already done this once for device discovery...*/ + if (status != PDC_OK) { + panic("pdc_pat_cell_module() call failed for LBA!\n"); + } + + if (PAT_GET_ENTITY(pa_pdc_cell->mod_info) != PAT_ENTITY_LBA) { + panic("pdc_pat_cell_module() entity returned != PAT_ENTITY_LBA!\n"); + } + + /* + ** Inspect the resources PAT tells us about + */ + for (i = 0; i < pa_count; i++) { + struct { + unsigned long type; + unsigned long start; + unsigned long end; /* aka finish */ + } *p, *io; + struct resource *r; + + p = (void *) &(pa_pdc_cell->mod[2+i*3]); + io = (void *) &(io_pdc_cell->mod[2+i*3]); + + /* Convert the PAT range data to PCI "struct resource" */ + switch(p->type & 0xff) { + 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.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); + 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.flags) { + sprintf(lba_dev->hba.elmmio_name, + "PCI%02x ELMMIO", + (int)lba_dev->hba.bus_num.start); + r = &lba_dev->hba.elmmio_space; + r->name = lba_dev->hba.elmmio_name; + } else { + printk(KERN_WARNING MODULE_NAME + " only supports 2 LMMIO resources!\n"); + break; + } + + r->start = p->start; + r->end = p->end; + r->flags = IORESOURCE_MEM; + r->parent = r->sibling = r->child = NULL; + break; + + case PAT_GMMIO: + /* MMIO space > 4GB phys addr; for 64-bit BAR */ + 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; + r->end = p->end; + r->flags = IORESOURCE_MEM; + r->parent = r->sibling = r->child = NULL; + break; + + case PAT_NPIOP: + printk(KERN_WARNING MODULE_NAME + " range[%d] : ignoring NPIOP (0x%lx)\n", + i, p->start); + break; + + case PAT_PIOP: + /* + ** Postable I/O port space is per PCI host adapter. + ** base of 64MB PIOP region + */ + lba_dev->iop_base = ioremap_nocache(p->start, 64 * 1024 * 1024); + + 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); + r->end = r->start + HBA_PORT_SPACE_SIZE - 1; + r->flags = IORESOURCE_IO; + r->parent = r->sibling = r->child = NULL; + break; + + default: + printk(KERN_WARNING MODULE_NAME + " range[%d] : unknown pat range type (0x%lx)\n", + i, p->type & 0xff); + break; + } + } + + kfree(pa_pdc_cell); + kfree(io_pdc_cell); +} +#else +/* keep compiler from complaining about missing declarations */ +#define lba_pat_port_ops lba_astro_port_ops +#define lba_pat_resources(pa_dev, lba_dev) +#endif /* CONFIG_64BIT */ + + +extern void sba_distributed_lmmio(struct parisc_device *, struct resource *); +extern void sba_directed_lmmio(struct parisc_device *, struct resource *); + + +static void +lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev) +{ + struct resource *r; + int lba_num; + + lba_dev->hba.lmmio_space_offset = PCI_F_EXTEND; + + /* + ** With "legacy" firmware, the lowest byte of FW_SCRATCH + ** represents bus->secondary and the second byte represents + ** bus->subsidiary (i.e. highest PPB programmed by firmware). + ** PCI bus walk *should* end up with the same result. + ** FIXME: But we don't have sanity checks in PCI or LBA. + */ + lba_num = READ_REG32(lba_dev->hba.base_addr + LBA_FW_SCRATCH); + r = &(lba_dev->hba.bus_num); + 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. + */ + r = &(lba_dev->hba.lmmio_space); + 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 + /* We want the CPU -> IO routing of addresses. + * The SBA BASE/MASK registers control CPU -> IO routing. + * Ask SBA what is routed to this rope/LBA. + */ + sba_distributed_lmmio(pa_dev, r); +#else + /* + * The LBA BASE/MASK registers control IO -> System routing. + * + * The following code works but doesn't get us what we want. + * Well, only because firmware (v5.0) on C3000 doesn't program + * the LBA BASE/MASE registers to be the exact inverse of + * the corresponding SBA registers. Other Astro/Pluto + * based platform firmware may do it right. + * + * Should someone want to mess with MSI, they may need to + * reprogram LBA BASE/MASK registers. Thus preserve the code + * below until MSI is known to work on C3000/A500/N4000/RP3440. + * + * Using the code below, /proc/iomem shows: + * ... + * f0000000-f0ffffff : PCI00 LMMIO + * f05d0000-f05d0000 : lcd_data + * f05d0008-f05d0008 : lcd_cmd + * f1000000-f1ffffff : PCI01 LMMIO + * f4000000-f4ffffff : PCI02 LMMIO + * f4000000-f4001fff : sym53c8xx + * f4002000-f4003fff : sym53c8xx + * f4004000-f40043ff : sym53c8xx + * f4005000-f40053ff : sym53c8xx + * f4007000-f4007fff : ohci_hcd + * f4008000-f40083ff : tulip + * f6000000-f6ffffff : PCI03 LMMIO + * f8000000-fbffffff : PCI00 ELMMIO + * fa100000-fa4fffff : stifb mmio + * fb000000-fb1fffff : stifb fb + * + * But everything listed under PCI02 actually lives under PCI00. + * This is clearly wrong. + * + * Asking SBA how things are routed tells the correct story: + * LMMIO_BASE/MASK/ROUTE f4000001 fc000000 00000000 + * DIR0_BASE/MASK/ROUTE fa000001 fe000000 00000006 + * DIR1_BASE/MASK/ROUTE f9000001 ff000000 00000004 + * DIR2_BASE/MASK/ROUTE f0000000 fc000000 00000000 + * DIR3_BASE/MASK/ROUTE f0000000 fc000000 00000000 + * + * Which looks like this in /proc/iomem: + * f4000000-f47fffff : PCI00 LMMIO + * f4000000-f4001fff : sym53c8xx + * ...[deteled core devices - same as above]... + * f4008000-f40083ff : tulip + * f4800000-f4ffffff : PCI01 LMMIO + * f6000000-f67fffff : PCI02 LMMIO + * f7000000-f77fffff : PCI03 LMMIO + * f9000000-f9ffffff : PCI02 ELMMIO + * fa000000-fbffffff : PCI03 ELMMIO + * fa100000-fa4fffff : stifb mmio + * fb000000-fb1fffff : stifb fb + * + * ie all Built-in core are under now correctly under PCI00. + * The "PCI02 ELMMIO" directed range is for: + * +-[02]---03.0 3Dfx Interactive, Inc. Voodoo 2 + * + * All is well now. + */ + r->start = READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_BASE); + if (r->start & 1) { + unsigned long rsize; + + r->flags = IORESOURCE_MEM; + /* mmio_mask also clears Enable bit */ + r->start &= mmio_mask; + r->start = PCI_HOST_ADDR(HBA_DATA(lba_dev), r->start); + rsize = ~ READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_MASK); + + /* + ** Each rope only gets part of the distributed range. + ** Adjust "window" for this rope. + */ + rsize /= ROPES_PER_IOC; + r->start += (rsize + 1) * LBA_NUM(pa_dev->hpa.start); + r->end = r->start + rsize; + } else { + r->end = r->start = 0; /* Not enabled. */ + } +#endif + + /* + ** "Directed" ranges are used when the "distributed range" isn't + ** sufficient for all devices below a given LBA. Typically devices + ** like graphics cards or X25 may need a directed range when the + ** bus has multiple slots (ie multiple devices) or the device + ** needs more than the typical 4 or 8MB a distributed range offers. + ** + ** The main reason for ignoring it now frigging complications. + ** Directed ranges may overlap (and have precedence) over + ** distributed ranges. Or a distributed range assigned to a unused + ** rope may be used by a directed range on a different rope. + ** Support for graphics devices may require fixing this + ** since they may be assigned a directed range which overlaps + ** an existing (but unused portion of) distributed range. + */ + r = &(lba_dev->hba.elmmio_space); + 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 + /* See comment which precedes call to sba_directed_lmmio() */ + sba_directed_lmmio(pa_dev, r); +#else + r->start = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_BASE); + + if (r->start & 1) { + unsigned long rsize; + r->flags = IORESOURCE_MEM; + /* mmio_mask also clears Enable bit */ + r->start &= mmio_mask; + r->start = PCI_HOST_ADDR(HBA_DATA(lba_dev), r->start); + rsize = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_MASK); + r->end = r->start + ~rsize; + } +#endif + + r = &(lba_dev->hba.io_space); + 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; + r->end = r->start + (READ_REG32(lba_dev->hba.base_addr + LBA_IOS_MASK) ^ (HBA_PORT_SPACE_SIZE - 1)); + + /* Virtualize the I/O Port space ranges */ + lba_num = HBA_PORT_BASE(lba_dev->hba.hba_num); + r->start |= lba_num; + r->end |= lba_num; +} + + +/************************************************************************** +** +** LBA initialization code (HW and SW) +** +** o identify LBA chip itself +** o initialize LBA chip modes (HardFail) +** o FIXME: initialize DMA hints for reasonable defaults +** o enable configuration functions +** o call pci_register_ops() to discover devs (fixup/fixup_bus get invoked) +** +**************************************************************************/ + +static int __init +lba_hw_init(struct lba_device *d) +{ + u32 stat; + u32 bus_reset; /* PDC_PAT_BUG */ + +#if 0 + printk(KERN_DEBUG "LBA %lx STAT_CTL %Lx ERROR_CFG %Lx STATUS %Lx DMA_CTL %Lx\n", + d->hba.base_addr, + READ_REG64(d->hba.base_addr + LBA_STAT_CTL), + READ_REG64(d->hba.base_addr + LBA_ERROR_CONFIG), + READ_REG64(d->hba.base_addr + LBA_ERROR_STATUS), + READ_REG64(d->hba.base_addr + LBA_DMA_CTL) ); + printk(KERN_DEBUG " ARB mask %Lx pri %Lx mode %Lx mtlt %Lx\n", + READ_REG64(d->hba.base_addr + LBA_ARB_MASK), + READ_REG64(d->hba.base_addr + LBA_ARB_PRI), + READ_REG64(d->hba.base_addr + LBA_ARB_MODE), + READ_REG64(d->hba.base_addr + LBA_ARB_MTLT) ); + printk(KERN_DEBUG " HINT cfg 0x%Lx\n", + READ_REG64(d->hba.base_addr + LBA_HINT_CFG)); + printk(KERN_DEBUG " HINT reg "); + { int i; + for (i=LBA_HINT_BASE; i< (14*8 + LBA_HINT_BASE); i+=8) + printk(" %Lx", READ_REG64(d->hba.base_addr + i)); + } + printk("\n"); +#endif /* DEBUG_LBA_PAT */ + +#ifdef CONFIG_64BIT +/* + * FIXME add support for PDC_PAT_IO "Get slot status" - OLAR support + * Only N-Class and up can really make use of Get slot status. + * maybe L-class too but I've never played with it there. + */ +#endif + + /* PDC_PAT_BUG: exhibited in rev 40.48 on L2000 */ + bus_reset = READ_REG32(d->hba.base_addr + LBA_STAT_CTL + 4) & 1; + if (bus_reset) { + printk(KERN_DEBUG "NOTICE: PCI bus reset still asserted! (clearing)\n"); + } + + stat = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG); + if (stat & LBA_SMART_MODE) { + printk(KERN_DEBUG "NOTICE: LBA in SMART mode! (cleared)\n"); + stat &= ~LBA_SMART_MODE; + WRITE_REG32(stat, d->hba.base_addr + LBA_ERROR_CONFIG); + } + + /* Set HF mode as the default (vs. -1 mode). */ + stat = READ_REG32(d->hba.base_addr + LBA_STAT_CTL); + WRITE_REG32(stat | HF_ENABLE, d->hba.base_addr + LBA_STAT_CTL); + + /* + ** Writing a zero to STAT_CTL.rf (bit 0) will clear reset signal + ** if it's not already set. If we just cleared the PCI Bus Reset + ** signal, wait a bit for the PCI devices to recover and setup. + */ + if (bus_reset) + mdelay(pci_post_reset_delay); + + if (0 == READ_REG32(d->hba.base_addr + LBA_ARB_MASK)) { + /* + ** PDC_PAT_BUG: PDC rev 40.48 on L2000. + ** B2000/C3600/J6000 also have this problem? + ** + ** Elroys with hot pluggable slots don't get configured + ** correctly if the slot is empty. ARB_MASK is set to 0 + ** and we can't master transactions on the bus if it's + ** not at least one. 0x3 enables elroy and first slot. + */ + printk(KERN_DEBUG "NOTICE: Enabling PCI Arbitration\n"); + WRITE_REG32(0x3, d->hba.base_addr + LBA_ARB_MASK); + } + + /* + ** FIXME: Hint registers are programmed with default hint + ** values by firmware. Hints should be sane even if we + ** can't reprogram them the way drivers want. + */ + 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. + */ +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); + + if (IS_ELROY(dev)) { + func_class &= 0xf; + switch (func_class) { + case 0: version = "TR1.0"; break; + case 1: version = "TR2.0"; break; + case 2: version = "TR2.1"; break; + case 3: version = "TR2.2"; break; + case 4: version = "TR3.0"; break; + case 5: version = "TR4.0"; break; + default: version = "TR4+"; + } + + 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 " + "TR2.1 - continuing under adversity.\n"); + } + +#if 0 +/* Elroy TR4.0 should work with simple algorithm. + But it doesn't. Still missing something. *sigh* +*/ + if (func_class > 4) { + cfg_ops = &mercury_cfg_ops; + } else +#endif + { + cfg_ops = &elroy_cfg_ops; + } + + } else if (IS_MERCURY(dev) || IS_QUICKSILVER(dev)) { + int major, minor; + + func_class &= 0xff; + 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 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", + (long)dev->hpa.start); + return -ENODEV; + } + + /* 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 = kzalloc(sizeof(struct lba_device), GFP_KERNEL); + if (!lba_dev) { + printk(KERN_ERR "lba_init_chip - couldn't alloc lba_device\n"); + return(1); + } + + + /* ---------- First : initialize data we already have --------- */ + + lba_dev->hw_rev = func_class; + lba_dev->hba.base_addr = addr; + 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; + pcibios_register_hba(HBA_DATA(lba_dev)); + spin_lock_init(&lba_dev->lba_lock); + + if (lba_hw_init(lba_dev)) + return(1); + + /* ---------- Third : setup I/O Port and MMIO resources --------- */ + + if (is_pdc_pat()) { + /* PDC PAT firmware uses PIOP region of GMMIO space. */ + pci_port = &lba_pat_port_ops; + /* Go ask PDC PAT what resources this LBA has */ + lba_pat_resources(dev, lba_dev); + } else { + if (!astro_iop_base) { + /* Sprockets PDC uses NPIOP region */ + astro_iop_base = ioremap_nocache(LBA_PORT_BASE, 64 * 1024); + pci_port = &lba_astro_port_ops; + } + + /* Poke the chip a bit for /proc output */ + lba_legacy_resources(dev, lba_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_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()) { + /* assign resources to un-initialized devices */ + + DBG_PAT("LBA pci_bus_size_bridges()\n"); + pci_bus_size_bridges(lba_bus); + + DBG_PAT("LBA pci_bus_assign_resources()\n"); + pci_bus_assign_resources(lba_bus); + +#ifdef DEBUG_LBA_PAT + DBG_PAT("\nLBA PIOP resource tree\n"); + lba_dump_res(&lba_dev->hba.io_space, 2); + DBG_PAT("\nLBA LMMIO resource tree\n"); + lba_dump_res(&lba_dev->hba.lmmio_space, 2); +#endif + } + + /* + ** Once PCI register ops has walked the bus, access to config + ** space is restricted. Avoids master aborts on config cycles. + ** Early LBA revs go fatal on *any* master abort. + */ + if (cfg_ops == &elroy_cfg_ops) { + lba_dev->flags |= LBA_FLAG_SKIP_PROBE; + } + + lba_next_bus = max + 1; + pci_bus_add_devices(lba_bus); + + /* Whew! Finally done! Tell services we got this one covered. */ + return 0; +} + +static struct parisc_device_id lba_tbl[] = { + { HPHW_BRIDGE, HVERSION_REV_ANY_ID, ELROY_HVERS, 0xa }, + { HPHW_BRIDGE, HVERSION_REV_ANY_ID, MERCURY_HVERS, 0xa }, + { HPHW_BRIDGE, HVERSION_REV_ANY_ID, QUICKSILVER_HVERS, 0xa }, + { 0, } +}; + +static struct parisc_driver lba_driver = { + .name = MODULE_NAME, + .id_table = lba_tbl, + .probe = lba_driver_probe, +}; + +/* +** One time initialization to let the world know the LBA was found. +** Must be called exactly once before pci_init(). +*/ +void __init lba_init(void) +{ + register_parisc_driver(&lba_driver); +} + +/* +** Initialize the IBASE/IMASK registers for LBA (Elroy). +** Only called from sba_iommu.c in order to route ranges (MMIO vs DMA). +** sba_iommu is responsible for locking (none needed at init time). +*/ +void lba_set_iregs(struct parisc_device *lba, u32 ibase, u32 imask) +{ + void __iomem * base_addr = ioremap_nocache(lba->hpa.start, 4096); + + imask <<= 2; /* adjust for hints - 2 more bits */ + + /* Make sure we aren't trying to set bits that aren't writeable. */ + WARN_ON((ibase & 0x001fffff) != 0); + WARN_ON((imask & 0x001fffff) != 0); + + DBG("%s() ibase 0x%x imask 0x%x\n", __func__, ibase, imask); + WRITE_REG32( imask, base_addr + LBA_IMASK); + WRITE_REG32( ibase, base_addr + LBA_IBASE); + iounmap(base_addr); +} + |