/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved. */ #include #include char pciio_info_fingerprint[] = "pciio_info"; /* ===================================================================== * PCI Generic Bus Provider * Implement PCI provider operations. The pciio* layer provides a * platform-independent interface for PCI devices. This layer * switches among the possible implementations of a PCI adapter. */ /* ===================================================================== * Provider Function Location * * If there is more than one possible provider for * this platform, we need to examine the master * vertex of the current vertex for a provider * function structure, and indirect through the * appropriately named member. */ pciio_provider_t * pciio_to_provider_fns(vertex_hdl_t dev) { pciio_info_t card_info; pciio_provider_t *provider_fns; /* * We're called with two types of vertices, one is * the bridge vertex (ends with "pci") and the other is the * pci slot vertex (ends with "pci/[0-8]"). For the first type * we need to get the provider from the PFUNCS label. For * the second we get it from fastinfo/c_pops. */ provider_fns = pciio_provider_fns_get(dev); if (provider_fns == NULL) { card_info = pciio_info_get(dev); if (card_info != NULL) { provider_fns = pciio_info_pops_get(card_info); } } if (provider_fns == NULL) { char devname[MAXDEVNAME]; panic("%s: provider_fns == NULL", vertex_to_name(dev, devname, MAXDEVNAME)); } return provider_fns; } #define DEV_FUNC(dev,func) pciio_to_provider_fns(dev)->func #define CAST_PIOMAP(x) ((pciio_piomap_t)(x)) #define CAST_DMAMAP(x) ((pciio_dmamap_t)(x)) #define CAST_INTR(x) ((pciio_intr_t)(x)) /* * Many functions are not passed their vertex * information directly; rather, they must * dive through a resource map. These macros * are available to coordinate this detail. */ #define PIOMAP_FUNC(map,func) DEV_FUNC((map)->pp_dev,func) #define DMAMAP_FUNC(map,func) DEV_FUNC((map)->pd_dev,func) #define INTR_FUNC(intr_hdl,func) DEV_FUNC((intr_hdl)->pi_dev,func) /* ===================================================================== * PIO MANAGEMENT * * For mapping system virtual address space to * pciio space on a specified card */ pciio_piomap_t pciio_piomap_alloc(vertex_hdl_t dev, /* set up mapping for this device */ device_desc_t dev_desc, /* device descriptor */ pciio_space_t space, /* CFG, MEM, IO, or a device-decoded window */ iopaddr_t addr, /* lowest address (or offset in window) */ size_t byte_count, /* size of region containing our mappings */ size_t byte_count_max, /* maximum size of a mapping */ unsigned flags) { /* defined in sys/pio.h */ return (pciio_piomap_t) DEV_FUNC(dev, piomap_alloc) (dev, dev_desc, space, addr, byte_count, byte_count_max, flags); } void pciio_piomap_free(pciio_piomap_t pciio_piomap) { PIOMAP_FUNC(pciio_piomap, piomap_free) (CAST_PIOMAP(pciio_piomap)); } caddr_t pciio_piomap_addr(pciio_piomap_t pciio_piomap, /* mapping resources */ iopaddr_t pciio_addr, /* map for this pciio address */ size_t byte_count) { /* map this many bytes */ pciio_piomap->pp_kvaddr = PIOMAP_FUNC(pciio_piomap, piomap_addr) (CAST_PIOMAP(pciio_piomap), pciio_addr, byte_count); return pciio_piomap->pp_kvaddr; } void pciio_piomap_done(pciio_piomap_t pciio_piomap) { PIOMAP_FUNC(pciio_piomap, piomap_done) (CAST_PIOMAP(pciio_piomap)); } caddr_t pciio_piotrans_addr(vertex_hdl_t dev, /* translate for this device */ device_desc_t dev_desc, /* device descriptor */ pciio_space_t space, /* CFG, MEM, IO, or a device-decoded window */ iopaddr_t addr, /* starting address (or offset in window) */ size_t byte_count, /* map this many bytes */ unsigned flags) { /* (currently unused) */ return DEV_FUNC(dev, piotrans_addr) (dev, dev_desc, space, addr, byte_count, flags); } caddr_t pciio_pio_addr(vertex_hdl_t dev, /* translate for this device */ device_desc_t dev_desc, /* device descriptor */ pciio_space_t space, /* CFG, MEM, IO, or a device-decoded window */ iopaddr_t addr, /* starting address (or offset in window) */ size_t byte_count, /* map this many bytes */ pciio_piomap_t *mapp, /* where to return the map pointer */ unsigned flags) { /* PIO flags */ pciio_piomap_t map = 0; int errfree = 0; caddr_t res; if (mapp) { map = *mapp; /* possible pre-allocated map */ *mapp = 0; /* record "no map used" */ } res = pciio_piotrans_addr (dev, dev_desc, space, addr, byte_count, flags); if (res) return res; /* pciio_piotrans worked */ if (!map) { map = pciio_piomap_alloc (dev, dev_desc, space, addr, byte_count, byte_count, flags); if (!map) return res; /* pciio_piomap_alloc failed */ errfree = 1; } res = pciio_piomap_addr (map, addr, byte_count); if (!res) { if (errfree) pciio_piomap_free(map); return res; /* pciio_piomap_addr failed */ } if (mapp) *mapp = map; /* pass back map used */ return res; /* pciio_piomap_addr succeeded */ } iopaddr_t pciio_piospace_alloc(vertex_hdl_t dev, /* Device requiring space */ device_desc_t dev_desc, /* Device descriptor */ pciio_space_t space, /* MEM32/MEM64/IO */ size_t byte_count, /* Size of mapping */ size_t align) { /* Alignment needed */ if (align < PAGE_SIZE) align = PAGE_SIZE; return DEV_FUNC(dev, piospace_alloc) (dev, dev_desc, space, byte_count, align); } void pciio_piospace_free(vertex_hdl_t dev, /* Device freeing space */ pciio_space_t space, /* Type of space */ iopaddr_t pciaddr, /* starting address */ size_t byte_count) { /* Range of address */ DEV_FUNC(dev, piospace_free) (dev, space, pciaddr, byte_count); } /* ===================================================================== * DMA MANAGEMENT * * For mapping from pci space to system * physical space. */ pciio_dmamap_t pciio_dmamap_alloc(vertex_hdl_t dev, /* set up mappings for this device */ device_desc_t dev_desc, /* device descriptor */ size_t byte_count_max, /* max size of a mapping */ unsigned flags) { /* defined in dma.h */ return (pciio_dmamap_t) DEV_FUNC(dev, dmamap_alloc) (dev, dev_desc, byte_count_max, flags); } void pciio_dmamap_free(pciio_dmamap_t pciio_dmamap) { DMAMAP_FUNC(pciio_dmamap, dmamap_free) (CAST_DMAMAP(pciio_dmamap)); } iopaddr_t pciio_dmamap_addr(pciio_dmamap_t pciio_dmamap, /* use these mapping resources */ paddr_t paddr, /* map for this address */ size_t byte_count) { /* map this many bytes */ return DMAMAP_FUNC(pciio_dmamap, dmamap_addr) (CAST_DMAMAP(pciio_dmamap), paddr, byte_count); } void pciio_dmamap_done(pciio_dmamap_t pciio_dmamap) { DMAMAP_FUNC(pciio_dmamap, dmamap_done) (CAST_DMAMAP(pciio_dmamap)); } iopaddr_t pciio_dmatrans_addr(vertex_hdl_t dev, /* translate for this device */ device_desc_t dev_desc, /* device descriptor */ paddr_t paddr, /* system physical address */ size_t byte_count, /* length */ unsigned flags) { /* defined in dma.h */ return DEV_FUNC(dev, dmatrans_addr) (dev, dev_desc, paddr, byte_count, flags); } iopaddr_t pciio_dma_addr(vertex_hdl_t dev, /* translate for this device */ device_desc_t dev_desc, /* device descriptor */ paddr_t paddr, /* system physical address */ size_t byte_count, /* length */ pciio_dmamap_t *mapp, /* map to use, then map we used */ unsigned flags) { /* PIO flags */ pciio_dmamap_t map = 0; int errfree = 0; iopaddr_t res; if (mapp) { map = *mapp; /* possible pre-allocated map */ *mapp = 0; /* record "no map used" */ } res = pciio_dmatrans_addr (dev, dev_desc, paddr, byte_count, flags); if (res) return res; /* pciio_dmatrans worked */ if (!map) { map = pciio_dmamap_alloc (dev, dev_desc, byte_count, flags); if (!map) return res; /* pciio_dmamap_alloc failed */ errfree = 1; } res = pciio_dmamap_addr (map, paddr, byte_count); if (!res) { if (errfree) pciio_dmamap_free(map); return res; /* pciio_dmamap_addr failed */ } if (mapp) *mapp = map; /* pass back map used */ return res; /* pciio_dmamap_addr succeeded */ } void pciio_dmamap_drain(pciio_dmamap_t map) { DMAMAP_FUNC(map, dmamap_drain) (CAST_DMAMAP(map)); } void pciio_dmaaddr_drain(vertex_hdl_t dev, paddr_t addr, size_t size) { DEV_FUNC(dev, dmaaddr_drain) (dev, addr, size); } /* ===================================================================== * INTERRUPT MANAGEMENT * * Allow crosstalk devices to establish interrupts */ /* * Allocate resources required for an interrupt as specified in intr_desc. * Return resource handle in intr_hdl. */ pciio_intr_t pciio_intr_alloc(vertex_hdl_t dev, /* which Crosstalk device */ device_desc_t dev_desc, /* device descriptor */ pciio_intr_line_t lines, /* INTR line(s) to attach */ vertex_hdl_t owner_dev) { /* owner of this interrupt */ return (pciio_intr_t) DEV_FUNC(dev, intr_alloc) (dev, dev_desc, lines, owner_dev); } /* * Free resources consumed by intr_alloc. */ void pciio_intr_free(pciio_intr_t intr_hdl) { INTR_FUNC(intr_hdl, intr_free) (CAST_INTR(intr_hdl)); } /* * Associate resources allocated with a previous pciio_intr_alloc call with the * described handler, arg, name, etc. * * Returns 0 on success, returns <0 on failure. */ int pciio_intr_connect(pciio_intr_t intr_hdl, intr_func_t intr_func, intr_arg_t intr_arg) /* pciio intr resource handle */ { return INTR_FUNC(intr_hdl, intr_connect) (CAST_INTR(intr_hdl), intr_func, intr_arg); } /* * Disassociate handler with the specified interrupt. */ void pciio_intr_disconnect(pciio_intr_t intr_hdl) { INTR_FUNC(intr_hdl, intr_disconnect) (CAST_INTR(intr_hdl)); } /* * Return a hwgraph vertex that represents the CPU currently * targeted by an interrupt. */ vertex_hdl_t pciio_intr_cpu_get(pciio_intr_t intr_hdl) { return INTR_FUNC(intr_hdl, intr_cpu_get) (CAST_INTR(intr_hdl)); } void pciio_slot_func_to_name(char *name, pciio_slot_t slot, pciio_function_t func) { /* * standard connection points: * * PCIIO_SLOT_NONE: .../pci/direct * PCIIO_FUNC_NONE: .../pci/ ie. .../pci/3 * multifunction: .../pci/ ie. .../pci/3c */ if (slot == PCIIO_SLOT_NONE) sprintf(name, EDGE_LBL_DIRECT); else if (func == PCIIO_FUNC_NONE) sprintf(name, "%d", slot); else sprintf(name, "%d%c", slot, 'a'+func); } /* * pciio_cardinfo_get * * Get the pciio info structure corresponding to the * specified PCI "slot" (we like it when the same index * number is used for the PCI IDSEL, the REQ/GNT pair, * and the interrupt line being used for INTA. We like * it so much we call it the slot number). */ static pciio_info_t pciio_cardinfo_get( vertex_hdl_t pciio_vhdl, pciio_slot_t pci_slot) { char namebuf[16]; pciio_info_t info = 0; vertex_hdl_t conn; pciio_slot_func_to_name(namebuf, pci_slot, PCIIO_FUNC_NONE); if (GRAPH_SUCCESS == hwgraph_traverse(pciio_vhdl, namebuf, &conn)) { info = pciio_info_chk(conn); hwgraph_vertex_unref(conn); } return info; } /* * pciio_error_handler: * dispatch an error to the appropriate * pciio connection point, or process * it as a generic pci error. * Yes, the first parameter is the * provider vertex at the middle of * the bus; we get to the pciio connect * point using the ioerror widgetdev field. * * This function is called by the * specific PCI provider, after it has figured * out where on the PCI bus (including which slot, * if it can tell) the error came from. */ /*ARGSUSED */ int pciio_error_handler( vertex_hdl_t pciio_vhdl, int error_code, ioerror_mode_t mode, ioerror_t *ioerror) { pciio_info_t pciio_info; vertex_hdl_t pconn_vhdl; pciio_slot_t slot; int retval; #if DEBUG && ERROR_DEBUG printk("%v: pciio_error_handler\n", pciio_vhdl); #endif IOERR_PRINTF(printk(KERN_NOTICE "%v: PCI Bus Error: Error code: %d Error mode: %d\n", pciio_vhdl, error_code, mode)); /* If there is an error handler sitting on * the "no-slot" connection point, give it * first crack at the error. NOTE: it is * quite possible that this function may * do further refining of the ioerror. */ pciio_info = pciio_cardinfo_get(pciio_vhdl, PCIIO_SLOT_NONE); if (pciio_info && pciio_info->c_efunc) { pconn_vhdl = pciio_info_dev_get(pciio_info); retval = pciio_info->c_efunc (pciio_info->c_einfo, error_code, mode, ioerror); if (retval != IOERROR_UNHANDLED) return retval; } /* Is the error associated with a particular slot? */ if (IOERROR_FIELDVALID(ioerror, widgetdev)) { short widgetdev; /* * NOTE : * widgetdev is a 4byte value encoded as slot in the higher order * 2 bytes and function in the lower order 2 bytes. */ IOERROR_GETVALUE(widgetdev, ioerror, widgetdev); slot = pciio_widgetdev_slot_get(widgetdev); /* If this slot has an error handler, * deliver the error to it. */ pciio_info = pciio_cardinfo_get(pciio_vhdl, slot); if (pciio_info != NULL) { if (pciio_info->c_efunc != NULL) { pconn_vhdl = pciio_info_dev_get(pciio_info); retval = pciio_info->c_efunc (pciio_info->c_einfo, error_code, mode, ioerror); if (retval != IOERROR_UNHANDLED) return retval; } } } return (mode == MODE_DEVPROBE) ? IOERROR_HANDLED /* probes are OK */ : IOERROR_UNHANDLED; /* otherwise, foo! */ } /* ===================================================================== * CONFIGURATION MANAGEMENT */ /* * Startup a crosstalk provider */ void pciio_provider_startup(vertex_hdl_t pciio_provider) { DEV_FUNC(pciio_provider, provider_startup) (pciio_provider); } /* * Shutdown a crosstalk provider */ void pciio_provider_shutdown(vertex_hdl_t pciio_provider) { DEV_FUNC(pciio_provider, provider_shutdown) (pciio_provider); } /* * Read value of configuration register */ uint64_t pciio_config_get(vertex_hdl_t dev, unsigned reg, unsigned size) { uint64_t value = 0; unsigned shift = 0; /* handle accesses that cross words here, * since that's common code between all * possible providers. */ while (size > 0) { unsigned biw = 4 - (reg&3); if (biw > size) biw = size; value |= DEV_FUNC(dev, config_get) (dev, reg, biw) << shift; shift += 8*biw; reg += biw; size -= biw; } return value; } /* * Change value of configuration register */ void pciio_config_set(vertex_hdl_t dev, unsigned reg, unsigned size, uint64_t value) { /* handle accesses that cross words here, * since that's common code between all * possible providers. */ while (size > 0) { unsigned biw = 4 - (reg&3); if (biw > size) biw = size; DEV_FUNC(dev, config_set) (dev, reg, biw, value); reg += biw; size -= biw; value >>= biw * 8; } } /* ===================================================================== * GENERIC PCI SUPPORT FUNCTIONS */ /* * Issue a hardware reset to a card. */ int pciio_reset(vertex_hdl_t dev) { return DEV_FUNC(dev, reset) (dev); } /****** Generic pci slot information interfaces ******/ pciio_info_t pciio_info_chk(vertex_hdl_t pciio) { arbitrary_info_t ainfo = 0; hwgraph_info_get_LBL(pciio, INFO_LBL_PCIIO, &ainfo); return (pciio_info_t) ainfo; } pciio_info_t pciio_info_get(vertex_hdl_t pciio) { pciio_info_t pciio_info; pciio_info = (pciio_info_t) hwgraph_fastinfo_get(pciio); if ((pciio_info != NULL) && (pciio_info->c_fingerprint != pciio_info_fingerprint) && (pciio_info->c_fingerprint != NULL)) { return((pciio_info_t)-1); /* Should panic .. */ } return pciio_info; } void pciio_info_set(vertex_hdl_t pciio, pciio_info_t pciio_info) { if (pciio_info != NULL) pciio_info->c_fingerprint = pciio_info_fingerprint; hwgraph_fastinfo_set(pciio, (arbitrary_info_t) pciio_info); /* Also, mark this vertex as a PCI slot * and use the pciio_info, so pciio_info_chk * can work (and be fairly efficient). */ hwgraph_info_add_LBL(pciio, INFO_LBL_PCIIO, (arbitrary_info_t) pciio_info); } vertex_hdl_t pciio_info_dev_get(pciio_info_t pciio_info) { return (pciio_info->c_vertex); } /*ARGSUSED*/ pciio_bus_t pciio_info_bus_get(pciio_info_t pciio_info) { return (pciio_info->c_bus); } pciio_slot_t pciio_info_slot_get(pciio_info_t pciio_info) { return (pciio_info->c_slot); } pciio_function_t pciio_info_function_get(pciio_info_t pciio_info) { return (pciio_info->c_func); } pciio_vendor_id_t pciio_info_vendor_id_get(pciio_info_t pciio_info) { return (pciio_info->c_vendor); } pciio_device_id_t pciio_info_device_id_get(pciio_info_t pciio_info) { return (pciio_info->c_device); } vertex_hdl_t pciio_info_master_get(pciio_info_t pciio_info) { return (pciio_info->c_master); } arbitrary_info_t pciio_info_mfast_get(pciio_info_t pciio_info) { return (pciio_info->c_mfast); } pciio_provider_t * pciio_info_pops_get(pciio_info_t pciio_info) { return (pciio_info->c_pops); } /* ===================================================================== * GENERIC PCI INITIALIZATION FUNCTIONS */ /* * pciioattach: called for each vertex in the graph * that is a PCI provider. */ /*ARGSUSED */ int pciio_attach(vertex_hdl_t pciio) { #if DEBUG && ATTACH_DEBUG char devname[MAXDEVNAME]; printk("%s: pciio_attach\n", vertex_to_name(pciio, devname, MAXDEVNAME)); #endif return 0; } /* * Associate a set of pciio_provider functions with a vertex. */ void pciio_provider_register(vertex_hdl_t provider, pciio_provider_t *pciio_fns) { hwgraph_info_add_LBL(provider, INFO_LBL_PFUNCS, (arbitrary_info_t) pciio_fns); } /* * Disassociate a set of pciio_provider functions with a vertex. */ void pciio_provider_unregister(vertex_hdl_t provider) { arbitrary_info_t ainfo; hwgraph_info_remove_LBL(provider, INFO_LBL_PFUNCS, (long *) &ainfo); } /* * Obtain a pointer to the pciio_provider functions for a specified Crosstalk * provider. */ pciio_provider_t * pciio_provider_fns_get(vertex_hdl_t provider) { arbitrary_info_t ainfo = 0; (void) hwgraph_info_get_LBL(provider, INFO_LBL_PFUNCS, &ainfo); return (pciio_provider_t *) ainfo; } pciio_info_t pciio_device_info_new( pciio_info_t pciio_info, vertex_hdl_t master, pciio_slot_t slot, pciio_function_t func, pciio_vendor_id_t vendor_id, pciio_device_id_t device_id) { if (!pciio_info) { pciio_info = kmalloc(sizeof (*(pciio_info)), GFP_KERNEL); if ( pciio_info ) memset(pciio_info, 0, sizeof (*(pciio_info))); else { printk(KERN_WARNING "pciio_device_info_new(): Unable to " "allocate memory\n"); return NULL; } } pciio_info->c_slot = slot; pciio_info->c_func = func; pciio_info->c_vendor = vendor_id; pciio_info->c_device = device_id; pciio_info->c_master = master; pciio_info->c_mfast = hwgraph_fastinfo_get(master); pciio_info->c_pops = pciio_provider_fns_get(master); pciio_info->c_efunc = 0; pciio_info->c_einfo = 0; return pciio_info; } void pciio_device_info_free(pciio_info_t pciio_info) { /* NOTE : pciio_info is a structure within the pcibr_info * and not a pointer to memory allocated on the heap !! */ memset((char *)pciio_info, 0, sizeof(pciio_info)); } vertex_hdl_t pciio_device_info_register( vertex_hdl_t connectpt, /* vertex at center of bus */ pciio_info_t pciio_info) /* details about the connectpt */ { char name[32]; vertex_hdl_t pconn; int device_master_set(vertex_hdl_t, vertex_hdl_t); pciio_slot_func_to_name(name, pciio_info->c_slot, pciio_info->c_func); if (GRAPH_SUCCESS != hwgraph_path_add(connectpt, name, &pconn)) return pconn; pciio_info->c_vertex = pconn; pciio_info_set(pconn, pciio_info); /* * create link to our pci provider */ device_master_set(pconn, pciio_info->c_master); return pconn; } void pciio_device_info_unregister(vertex_hdl_t connectpt, pciio_info_t pciio_info) { char name[32]; vertex_hdl_t pconn = NULL; if (!pciio_info) return; pciio_slot_func_to_name(name, pciio_info->c_slot, pciio_info->c_func); pciio_info_set(pconn,0); hwgraph_vertex_unref(pconn); hwgraph_vertex_destroy(pconn); } /*ARGSUSED */ int pciio_device_attach(vertex_hdl_t pconn, int drv_flags) { pciio_info_t pciio_info; pciio_vendor_id_t vendor_id; pciio_device_id_t device_id; pciio_info = pciio_info_get(pconn); vendor_id = pciio_info->c_vendor; device_id = pciio_info->c_device; /* we don't start attaching things until * all the driver init routines (including * pciio_init) have been called; so we * can assume here that we have a registry. */ return(cdl_add_connpt(vendor_id, device_id, pconn, drv_flags)); } int pciio_device_detach(vertex_hdl_t pconn, int drv_flags) { return(0); } /* * Allocate space from the specified PCI window mapping resource. On * success record information about the allocation in the supplied window * allocation cookie (if non-NULL) and return the address of the allocated * window. On failure return NULL. * * The "size" parameter is usually from a PCI device's Base Address Register * (BAR) decoder. As such, the allocation must be aligned to be a multiple of * that. The "align" parameter acts as a ``minimum alignment'' allocation * constraint. The alignment contraint reflects system or device addressing * restrictions such as the inability to share higher level ``windows'' * between devices, etc. The returned PCI address allocation will be a * multiple of the alignment constraint both in alignment and size. Thus, the * returned PCI address block is aligned to the maximum of the requested size * and alignment. */ iopaddr_t pciio_device_win_alloc(struct resource *root_resource, pciio_win_alloc_t win_alloc, size_t start, size_t size, size_t align) { struct resource *new_res; int status; new_res = (struct resource *) kmalloc( sizeof(struct resource), GFP_KERNEL); if (!new_res) return 0; if (start > 0) { status = allocate_resource( root_resource, new_res, size, start /* Min start addr. */, (start + size) - 1, 1, NULL, NULL); } else { if (size > align) align = size; status = allocate_resource( root_resource, new_res, size, align /* Min start addr. */, root_resource->end, align, NULL, NULL); } if (status) { kfree(new_res); return((iopaddr_t) NULL); } /* * If a window allocation cookie has been supplied, use it to keep * track of all the allocated space assigned to this window. */ if (win_alloc) { win_alloc->wa_resource = new_res; win_alloc->wa_base = new_res->start; win_alloc->wa_pages = size; } return new_res->start; } /* * Free the specified window allocation back into the PCI window mapping * resource. As noted above, we keep page addresses offset by 1 ... */ void pciio_device_win_free(pciio_win_alloc_t win_alloc) { int status; if (win_alloc->wa_resource) { status = release_resource(win_alloc->wa_resource); if (!status) kfree(win_alloc->wa_resource); else BUG(); } } /* * pciio_error_register: * arrange for a function to be called with * a specified first parameter plus other * information when an error is encountered * and traced to the pci slot corresponding * to the connection point pconn. * * may also be called with a null function * pointer to "unregister" the error handler. * * NOTE: subsequent calls silently overwrite * previous data for this vertex. We assume that * cooperating drivers, well, cooperate ... */ void pciio_error_register(vertex_hdl_t pconn, error_handler_f *efunc, error_handler_arg_t einfo) { pciio_info_t pciio_info; pciio_info = pciio_info_get(pconn); ASSERT(pciio_info != NULL); pciio_info->c_efunc = efunc; pciio_info->c_einfo = einfo; } /* * Check if any device has been found in this slot, and return * true or false * vhdl is the vertex for the slot */ int pciio_slot_inuse(vertex_hdl_t pconn_vhdl) { pciio_info_t pciio_info = pciio_info_get(pconn_vhdl); ASSERT(pciio_info); ASSERT(pciio_info->c_vertex == pconn_vhdl); if (pciio_info->c_vendor) { /* * Non-zero value for vendor indicate * a board being found in this slot. */ return 1; } return 0; } int pciio_info_type1_get(pciio_info_t pci_info) { return (pci_info->c_type1); }