/* * * 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) 2001-2002 Silicon Graphics, Inc. All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __ia64 #define rmallocmap atemapalloc #define rmfreemap atemapfree #define rmfree atefree #define rmalloc atealloc #endif extern pcibr_info_t pcibr_info_get(devfs_handle_t); extern int pcibr_widget_to_bus(devfs_handle_t pcibr_vhdl); extern pcibr_info_t pcibr_device_info_new(pcibr_soft_t, pciio_slot_t, pciio_function_t, pciio_vendor_id_t, pciio_device_id_t); extern int pcibr_slot_initial_rrb_alloc(devfs_handle_t,pciio_slot_t); extern int pcibr_pcix_rbars_calc(pcibr_soft_t); int pcibr_slot_info_init(devfs_handle_t pcibr_vhdl, pciio_slot_t slot); int pcibr_slot_info_free(devfs_handle_t pcibr_vhdl, pciio_slot_t slot); int pcibr_slot_addr_space_init(devfs_handle_t pcibr_vhdl, pciio_slot_t slot); int pcibr_slot_pcix_rbar_init(pcibr_soft_t pcibr_soft, pciio_slot_t slot); int pcibr_slot_device_init(devfs_handle_t pcibr_vhdl, pciio_slot_t slot); int pcibr_slot_guest_info_init(devfs_handle_t pcibr_vhdl, pciio_slot_t slot); int pcibr_slot_call_device_attach(devfs_handle_t pcibr_vhdl, pciio_slot_t slot, int drv_flags); int pcibr_slot_call_device_detach(devfs_handle_t pcibr_vhdl, pciio_slot_t slot, int drv_flags); int pcibr_slot_detach(devfs_handle_t pcibr_vhdl, pciio_slot_t slot, int drv_flags, char *l1_msg, int *sub_errorp); int pcibr_is_slot_sys_critical(devfs_handle_t pcibr_vhdl, pciio_slot_t slot); static int pcibr_probe_slot(bridge_t *, cfg_p, unsigned int *); void pcibr_device_info_free(devfs_handle_t, pciio_slot_t); iopaddr_t pcibr_bus_addr_alloc(pcibr_soft_t, pciio_win_info_t, pciio_space_t, int, int, int); void pciibr_bus_addr_free(pcibr_soft_t, pciio_win_info_t); cfg_p pcibr_find_capability(cfg_p, unsigned); extern uint64_t do_pcibr_config_get(int, cfg_p, unsigned, unsigned); void do_pcibr_config_set(int, cfg_p, unsigned, unsigned, uint64_t); int pcibr_slot_attach(devfs_handle_t pcibr_vhdl, pciio_slot_t slot, int drv_flags, char *l1_msg, int *sub_errorp); int pcibr_slot_info_return(pcibr_soft_t pcibr_soft, pciio_slot_t slot, pcibr_slot_info_resp_t respp); extern devfs_handle_t baseio_pci_vhdl; int scsi_ctlr_nums_add(devfs_handle_t, devfs_handle_t); /* For now .... */ /* * PCI Hot-Plug Capability Flags */ #define D_PCI_HOT_PLUG_ATTACH 0x200 /* Driver supports PCI hot-plug attach */ #define D_PCI_HOT_PLUG_DETACH 0x400 /* Driver supports PCI hot-plug detach */ /* * PCI-X Max Outstanding Split Transactions translation array and Max Memory * Read Byte Count translation array, as defined in the PCI-X Specification. * Section 7.2.3 & 7.2.4 of PCI-X Specification - rev 1.0 */ #define MAX_SPLIT_TABLE 8 #define MAX_READCNT_TABLE 4 int max_splittrans_to_numbuf[MAX_SPLIT_TABLE] = {1, 2, 3, 4, 8, 12, 16, 32}; int max_readcount_to_bufsize[MAX_READCNT_TABLE] = {512, 1024, 2048, 4096 }; /*========================================================================== * BRIDGE PCI SLOT RELATED IOCTLs */ /* * pcibr_slot_startup * Software start-up the PCI slot. */ #ifdef PIC_LATER int pcibr_slot_startup(devfs_handle_t pcibr_vhdl, pcibr_slot_req_t reqp) { pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl); pciio_slot_t slot; int error = 0; char l1_msg[BRL1_QSIZE+1]; struct pcibr_slot_up_resp_s tmp_up_resp; /* Make sure that we are dealing with a bridge device vertex */ if (!pcibr_soft) { return(PCI_NOT_A_BRIDGE); } /* req_slot is the 'external' slot number, convert for internal use */ slot = PCIBR_SLOT_TO_DEVICE(pcibr_soft, reqp->req_slot); /* Do not allow start-up of a slot in a shoehorn */ if(nic_vertex_info_match(pcibr_soft->bs_conn, XTALK_PCI_PART_NUM)) { return(PCI_SLOT_IN_SHOEHORN); } /* Check for the valid slot */ if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(PCI_NOT_A_SLOT); #ifdef PIC_LATER /* Acquire update access to the bus */ mrlock(pcibr_soft->bs_bus_lock, MR_UPDATE, PZERO); #endif if (pcibr_soft->bs_slot[slot].slot_status & SLOT_STARTUP_CMPLT) { error = PCI_SLOT_ALREADY_UP; goto startup_unlock; } error = pcibr_slot_attach(pcibr_vhdl, slot, D_PCI_HOT_PLUG_ATTACH, l1_msg, &tmp_up_resp.resp_sub_errno); strncpy(tmp_up_resp.resp_l1_msg, l1_msg, L1_QSIZE); tmp_up_resp.resp_l1_msg[L1_QSIZE] = '\0'; if (COPYOUT(&tmp_up_resp, reqp->req_respp.up, reqp->req_size)) { return(EFAULT); } startup_unlock: #ifdef PIC_LATER /* Release the bus lock */ mrunlock(pcibr_soft->bs_bus_lock); #endif return(error); } /* * pcibr_slot_shutdown * Software shut-down the PCI slot */ int pcibr_slot_shutdown(devfs_handle_t pcibr_vhdl, pcibr_slot_req_t reqp) { pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl); bridge_t *bridge; pciio_slot_t slot; int error = 0; char l1_msg[BRL1_QSIZE+1]; struct pcibr_slot_down_resp_s tmp_down_resp; pciio_slot_t tmp_slot; /* Make sure that we are dealing with a bridge device vertex */ if (!pcibr_soft) { return(PCI_NOT_A_BRIDGE); } /* req_slot is the 'external' slot number, convert for internal use */ slot = PCIBR_SLOT_TO_DEVICE(pcibr_soft, reqp->req_slot); bridge = pcibr_soft->bs_base; /* Check for valid slot */ if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(PCI_NOT_A_SLOT); /* Do not allow shut-down of a slot in a shoehorn */ if(nic_vertex_info_match(pcibr_soft->bs_conn, XTALK_PCI_PART_NUM)) { return(PCI_SLOT_IN_SHOEHORN); } #ifdef PIC_LATER /* Acquire update access to the bus */ mrlock(pcibr_soft->bs_bus_lock, MR_UPDATE, PZERO); #endif if ((pcibr_soft->bs_slot[slot].slot_status & SLOT_SHUTDOWN_CMPLT) || ((pcibr_soft->bs_slot[slot].slot_status & SLOT_STATUS_MASK) == 0)) { error = PCI_SLOT_ALREADY_DOWN; /* * RJR - Should we invoke an L1 slot power-down command just in case * a previous shut-down failed to power-down the slot? */ goto shutdown_unlock; } /* Do not allow a multi-function card to be hot-plug removed */ if (pcibr_soft->bs_slot[slot].bss_ninfo > 1) { tmp_down_resp.resp_sub_errno = EPERM; error = PCI_MULTI_FUNC_ERR; goto shutdown_copyout; } /* Do not allow the last 33 MHz card to be removed */ if ((bridge->b_wid_control & BRIDGE_CTRL_BUS_SPEED_MASK) == BRIDGE_CTRL_BUS_SPEED_33) { for (tmp_slot = pcibr_soft->bs_first_slot; tmp_slot <= pcibr_soft->bs_last_slot; tmp_slot++) if (tmp_slot != slot) if (pcibr_soft->bs_slot[tmp_slot].slot_status & SLOT_POWER_UP) { error++; break; } if (!error) { error = PCI_EMPTY_33MHZ; goto shutdown_unlock; } } error = pcibr_slot_detach(pcibr_vhdl, slot, D_PCI_HOT_PLUG_DETACH, l1_msg, &tmp_down_resp.resp_sub_errno); strncpy(tmp_down_resp.resp_l1_msg, l1_msg, L1_QSIZE); tmp_down_resp.resp_l1_msg[L1_QSIZE] = '\0'; shutdown_copyout: if (COPYOUT(&tmp_down_resp, reqp->req_respp.down, reqp->req_size)) { return(EFAULT); } shutdown_unlock: #ifdef PIC_LATER /* Release the bus lock */ mrunlock(pcibr_soft->bs_bus_lock); #endif return(error); } #endif /* PIC_LATER */ char *pci_space_name[] = {"NONE", "ROM", "IO", "", "MEM", "MEM32", "MEM64", "CFG", "WIN0", "WIN1", "WIN2", "WIN3", "WIN4", "WIN5", "", "BAD"}; void pcibr_slot_func_info_return(pcibr_info_h pcibr_infoh, int func, pcibr_slot_func_info_resp_t funcp) { pcibr_info_t pcibr_info = pcibr_infoh[func]; int win; boolean_t is_sys_critical_vertex(devfs_handle_t); funcp->resp_f_status = 0; if (!pcibr_info) { return; } funcp->resp_f_status |= FUNC_IS_VALID; #if defined(SUPPORT_PRINTING_V_FORMAT) sprintf(funcp->resp_f_slot_name, "%v", pcibr_info->f_vertex); #endif if(is_sys_critical_vertex(pcibr_info->f_vertex)) { funcp->resp_f_status |= FUNC_IS_SYS_CRITICAL; } funcp->resp_f_bus = pcibr_info->f_bus; funcp->resp_f_slot = PCIBR_INFO_SLOT_GET_EXT(pcibr_info); funcp->resp_f_func = pcibr_info->f_func; #if defined(SUPPORT_PRINTING_V_FORMAT) sprintf(funcp->resp_f_master_name, "%v", pcibr_info->f_master); #endif funcp->resp_f_pops = pcibr_info->f_pops; funcp->resp_f_efunc = pcibr_info->f_efunc; funcp->resp_f_einfo = pcibr_info->f_einfo; funcp->resp_f_vendor = pcibr_info->f_vendor; funcp->resp_f_device = pcibr_info->f_device; for(win = 0 ; win < 6 ; win++) { funcp->resp_f_window[win].resp_w_base = pcibr_info->f_window[win].w_base; funcp->resp_f_window[win].resp_w_size = pcibr_info->f_window[win].w_size; sprintf(funcp->resp_f_window[win].resp_w_space, "%s", pci_space_name[pcibr_info->f_window[win].w_space]); } funcp->resp_f_rbase = pcibr_info->f_rbase; funcp->resp_f_rsize = pcibr_info->f_rsize; for (win = 0 ; win < 4; win++) { funcp->resp_f_ibit[win] = pcibr_info->f_ibit[win]; } funcp->resp_f_att_det_error = pcibr_info->f_att_det_error; } int pcibr_slot_info_return(pcibr_soft_t pcibr_soft, pciio_slot_t slot, pcibr_slot_info_resp_t respp) { pcibr_soft_slot_t pss; int func; bridge_t *bridge = pcibr_soft->bs_base; reg_p b_respp; pcibr_slot_info_resp_t slotp; pcibr_slot_func_info_resp_t funcp; boolean_t is_sys_critical_vertex(devfs_handle_t); extern void snia_kmem_free(void *, int); slotp = snia_kmem_zalloc(sizeof(*slotp), 0); if (slotp == NULL) { return(ENOMEM); } pss = &pcibr_soft->bs_slot[slot]; slotp->resp_bs_bridge_mode = pcibr_soft->bs_bridge_mode; slotp->resp_bs_bridge_type = pcibr_soft->bs_bridge_type; slotp->resp_has_host = pss->has_host; slotp->resp_host_slot = pss->host_slot; #if defined(SUPPORT_PRINTING_V_FORMAT) sprintf(slotp->resp_slot_conn_name, "%v", pss->slot_conn); #else sprintf(slotp->resp_slot_conn_name, "%p", (void *)pss->slot_conn); #endif slotp->resp_slot_status = pss->slot_status; slotp->resp_l1_bus_num = pcibr_widget_to_bus(pcibr_soft->bs_vhdl); if (is_sys_critical_vertex(pss->slot_conn)) { slotp->resp_slot_status |= SLOT_IS_SYS_CRITICAL; } slotp->resp_bss_ninfo = pss->bss_ninfo; for (func = 0; func < pss->bss_ninfo; func++) { funcp = &(slotp->resp_func[func]); pcibr_slot_func_info_return(pss->bss_infos, func, funcp); } sprintf(slotp->resp_bss_devio_bssd_space, "%s", pci_space_name[pss->bss_devio.bssd_space]); slotp->resp_bss_devio_bssd_base = pss->bss_devio.bssd_base; slotp->resp_bss_device = pss->bss_device; slotp->resp_bss_pmu_uctr = pss->bss_pmu_uctr; slotp->resp_bss_d32_uctr = pss->bss_d32_uctr; slotp->resp_bss_d64_uctr = pss->bss_d64_uctr; slotp->resp_bss_d64_base = pss->bss_d64_base; slotp->resp_bss_d64_flags = pss->bss_d64_flags; slotp->resp_bss_d32_base = pss->bss_d32_base; slotp->resp_bss_d32_flags = pss->bss_d32_flags; slotp->resp_bss_ext_ates_active = pss->bss_ext_ates_active; slotp->resp_bss_cmd_pointer = pss->bss_cmd_pointer; slotp->resp_bss_cmd_shadow = pss->bss_cmd_shadow; slotp->resp_bs_rrb_valid = pcibr_soft->bs_rrb_valid[slot][VCHAN0]; slotp->resp_bs_rrb_valid_v1 = pcibr_soft->bs_rrb_valid[slot][VCHAN1]; slotp->resp_bs_rrb_valid_v2 = pcibr_soft->bs_rrb_valid[slot][VCHAN2]; slotp->resp_bs_rrb_valid_v3 = pcibr_soft->bs_rrb_valid[slot][VCHAN3]; slotp->resp_bs_rrb_res = pcibr_soft->bs_rrb_res[slot]; if (slot & 1) { b_respp = &bridge->b_odd_resp; } else { b_respp = &bridge->b_even_resp; } slotp->resp_b_resp = *b_respp; slotp->resp_b_int_device = bridge->b_int_device; if (IS_PIC_SOFT(pcibr_soft)) { slotp->resp_p_int_enable = bridge->p_int_enable_64; slotp->resp_p_int_host = bridge->p_int_addr_64[slot]; } else { slotp->resp_b_int_enable = bridge->b_int_enable; slotp->resp_b_int_host = bridge->b_int_addr[slot].addr; } if (COPYOUT(slotp, respp, sizeof(*respp))) { return(EFAULT); } snia_kmem_free(slotp, sizeof(*slotp)); return(0); } /* * pcibr_slot_query * Return information about the PCI slot maintained by the infrastructure. * Information is requested in the request structure. * * Information returned in the response structure: * Slot hwgraph name * Vendor/Device info * Base register info * Interrupt mapping from device pins to the bridge pins * Devio register * Software RRB info * RRB register info * Host/Gues info * PCI Bus #,slot #, function # * Slot provider hwgraph name * Provider Functions * Error handler * DMA mapping usage counters * DMA direct translation info * External SSRAM workaround info */ int pcibr_slot_query(devfs_handle_t pcibr_vhdl, pcibr_slot_req_t reqp) { pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl); pciio_slot_t slot; pciio_slot_t tmp_slot; pcibr_slot_info_resp_t respp = reqp->req_respp.query; int size = reqp->req_size; int error = 0; /* Make sure that we are dealing with a bridge device vertex */ if (!pcibr_soft) { return(PCI_NOT_A_BRIDGE); } /* req_slot is the 'external' slot number, convert for internal use */ slot = PCIBR_SLOT_TO_DEVICE(pcibr_soft, reqp->req_slot); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HOTPLUG, pcibr_vhdl, "pcibr_slot_query: pcibr_soft=0x%x, slot=%d, reqp=0x%x\n", pcibr_soft, slot, reqp)); /* Make sure that we have a valid PCI slot number or PCIIO_SLOT_NONE */ if ((!PCIBR_VALID_SLOT(pcibr_soft, slot)) && (slot != PCIIO_SLOT_NONE)) { return(PCI_NOT_A_SLOT); } /* Do not allow a query of a slot in a shoehorn */ if(nic_vertex_info_match(pcibr_soft->bs_conn, XTALK_PCI_PART_NUM)) { return(PCI_SLOT_IN_SHOEHORN); } /* Return information for the requested PCI slot */ if (slot != PCIIO_SLOT_NONE) { if (size < sizeof(*respp)) { return(PCI_RESP_AREA_TOO_SMALL); } #ifdef PIC_LATER /* Acquire read access to the bus */ mrlock(pcibr_soft->bs_bus_lock, MR_ACCESS, PZERO); #endif error = pcibr_slot_info_return(pcibr_soft, slot, respp); #ifdef PIC_LATER /* Release the bus lock */ mrunlock(pcibr_soft->bs_bus_lock); #endif return(error); } /* Return information for all the slots */ for (tmp_slot = pcibr_soft->bs_min_slot; tmp_slot < PCIBR_NUM_SLOTS(pcibr_soft); tmp_slot++) { if (size < sizeof(*respp)) { return(PCI_RESP_AREA_TOO_SMALL); } #ifdef PIC_LATER /* Acquire read access to the bus */ mrlock(pcibr_soft->bs_bus_lock, MR_ACCESS, PZERO); #endif error = pcibr_slot_info_return(pcibr_soft, tmp_slot, respp); #ifdef PCI_LATER /* Release the bus lock */ mrunlock(pcibr_soft->bs_bus_lock); #endif if (error) { return(error); } ++respp; size -= sizeof(*respp); } return(error); } #if 0 /* * pcibr_slot_reset * Reset the PCI device in the particular slot. * * The Xbridge does not comply with the PCI Specification * when resetting an indiviaudl slot. An individual slot is * is reset by toggling the slot's bit in the Xbridge Control * Register. The Xbridge will assert the target slot's * (non-bussed) RST signal, but does not assert the (bussed) * REQ64 signal as required by the specification. As * designed, the Xbridge cannot assert the REQ64 signal * becuase it may interfere with a bus transaction in progress. * The practical effects of this Xbridge implementation is * device dependent; it probably will not adversely effect * 32-bit cards, but may disable 64-bit data transfers by those * cards that normally support 64-bit data transfers. * * The Xbridge will assert REQ64 when all four slots are reset * by simultaneously toggling all four slot reset bits in the * Xbridge Control Register. This is basically a PCI bus reset * and asserting the (bussed) REQ64 signal will not interfere * with any bus transactions in progress. * * The Xbridge (and the SN0 Bridge) support resetting only * four PCI bus slots via the (X)bridge Control Register. * * To reset an individual slot for the PCI Hot-Plug feature * use the L1 console commands to power-down and then * power-up the slot, or use the kernel infrastructure * functions to power-down/up the slot when they are * implemented for SN1. */ int pcibr_slot_reset(devfs_handle_t pcibr_vhdl, pciio_slot_t slot) { pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl); bridge_t *bridge; bridgereg_t ctrlreg,tmp; volatile bridgereg_t *wrb_flush; if (!pcibr_soft) return(EINVAL); if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); /* Enable the DMA operations from this device of the xtalk widget * (PCI host bridge in this case). */ xtalk_widgetdev_enable(pcibr_soft->bs_conn, slot); /* Set the reset slot bit in the bridge's wid control register * to reset the PCI slot */ bridge = pcibr_soft->bs_base; /* Read the bridge widget control and clear out the reset pin * bit for the corresponding slot. */ tmp = ctrlreg = bridge->b_wid_control; tmp &= ~BRIDGE_CTRL_RST_PIN(slot); bridge->b_wid_control = tmp; tmp = bridge->b_wid_control; /* Restore the old control register back. * NOTE : PCI card gets reset when the reset pin bit * changes from 0 (set above) to 1 (going to be set now). */ bridge->b_wid_control = ctrlreg; /* Flush the write buffers if any !! */ wrb_flush = &(bridge->b_wr_req_buf[slot].reg); while (*wrb_flush); return(0); } #endif #define PROBE_LOCK 0 /* FIXME: we're attempting to lock around accesses * to b_int_enable. This hangs pcibr_probe_slot() */ /* * pcibr_slot_info_init * Probe for this slot and see if it is populated. * If it is populated initialize the generic PCI infrastructural * information associated with this particular PCI device. */ int pcibr_slot_info_init(devfs_handle_t pcibr_vhdl, pciio_slot_t slot) { pcibr_soft_t pcibr_soft; pcibr_info_h pcibr_infoh; pcibr_info_t pcibr_info; bridge_t *bridge; cfg_p cfgw; unsigned idword; unsigned pfail; unsigned idwords[8]; pciio_vendor_id_t vendor; pciio_device_id_t device; unsigned htype; unsigned lt_time; int nbars; cfg_p wptr; cfg_p pcix_cap; int win; pciio_space_t space; int nfunc; pciio_function_t rfunc; int func; devfs_handle_t conn_vhdl; pcibr_soft_slot_t slotp; /* Get the basic software information required to proceed */ pcibr_soft = pcibr_soft_get(pcibr_vhdl); if (!pcibr_soft) return(EINVAL); bridge = pcibr_soft->bs_base; if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); /* If we have a host slot (eg:- IOC3 has 2 PCI slots and the initialization * is done by the host slot then we are done. */ if (pcibr_soft->bs_slot[slot].has_host) { return(0); } /* Check for a slot with any system critical functions */ if (pcibr_is_slot_sys_critical(pcibr_vhdl, slot)) return(EPERM); /* Try to read the device-id/vendor-id from the config space */ cfgw = pcibr_slot_config_addr(bridge, slot, 0); #if PROBE_LOCK s = pcibr_lock(pcibr_soft); #endif if (pcibr_probe_slot(bridge, cfgw, &idword)) return(ENODEV); #if PROBE_LOCK pcibr_unlock(pcibr_soft, s); #endif slotp = &pcibr_soft->bs_slot[slot]; slotp->slot_status |= SLOT_POWER_UP; vendor = 0xFFFF & idword; device = 0xFFFF & (idword >> 16); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_PROBE, pcibr_vhdl, "pcibr_slot_info_init: slot=%d, vendor=0x%x, device=0x%x\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot), vendor, device)); /* If the vendor id is not valid then the slot is not populated * and we are done. */ if (vendor == 0xFFFF) return(ENODEV); htype = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_HEADER_TYPE, 1); nfunc = 1; rfunc = PCIIO_FUNC_NONE; pfail = 0; /* NOTE: if a card claims to be multifunction * but only responds to config space 0, treat * it as a unifunction card. */ if (htype & 0x80) { /* MULTIFUNCTION */ for (func = 1; func < 8; ++func) { cfgw = pcibr_func_config_addr(bridge, 0, slot, func, 0); #if PROBE_LOCK s = pcibr_lock(pcibr_soft); #endif if (pcibr_probe_slot(bridge, cfgw, &idwords[func])) { pfail |= 1 << func; continue; } #if PROBE_LOCK pcibr_unlock(pcibr_soft, s); #endif vendor = 0xFFFF & idwords[func]; if (vendor == 0xFFFF) { pfail |= 1 << func; continue; } nfunc = func + 1; rfunc = 0; } cfgw = pcibr_slot_config_addr(bridge, slot, 0); } NEWA(pcibr_infoh, nfunc); pcibr_soft->bs_slot[slot].bss_ninfo = nfunc; pcibr_soft->bs_slot[slot].bss_infos = pcibr_infoh; for (func = 0; func < nfunc; ++func) { unsigned cmd_reg; if (func) { if (pfail & (1 << func)) continue; idword = idwords[func]; cfgw = pcibr_func_config_addr(bridge, 0, slot, func, 0); device = 0xFFFF & (idword >> 16); htype = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_HEADER_TYPE, 1); rfunc = func; } htype &= 0x7f; if (htype != 0x00) { printk(KERN_WARNING "%s pcibr: pci slot %d func %d has strange header type 0x%x\n", pcibr_soft->bs_name, slot, func, htype); nbars = 2; } else { nbars = PCI_CFG_BASE_ADDRS; } PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_CONFIG, pcibr_vhdl, "pcibr_slot_info_init: slot=%d, func=%d, cfgw=0x%x\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft,slot), func, cfgw)); #ifdef PIC_LATER /* * Check for a Quad ATM PCI "card" and return all the PCI bus * memory and I/O space. This will work-around an apparent * hardware problem with the Quad ATM XIO card handling large * PIO addresses. Releasing all the space for use by the card * will lower the PIO addresses with the PCI bus address space. * This is OK since the PROM did not assign any BAR addresses. * * Only release all the PCI bus addresses once. * */ if ((vendor == LINC_VENDOR_ID_NUM) && (device == LINC_DEVICE_ID_NUM)) { iopaddr_t prom_base_addr = pcibr_soft->bs_xid << 24; int prom_base_size = 0x1000000; if (!(pcibr_soft->bs_bus_addr_status & PCIBR_BUS_ADDR_MEM_FREED)) { pciio_device_win_populate(&pcibr_soft->bs_mem_win_map, prom_base_addr, prom_base_size); pcibr_soft->bs_bus_addr_status |= PCIBR_BUS_ADDR_MEM_FREED; } if (!(pcibr_soft->bs_bus_addr_status & PCIBR_BUS_ADDR_IO_FREED)) { pciio_device_win_populate(&pcibr_soft->bs_io_win_map, prom_base_addr, prom_base_size); pcibr_soft->bs_bus_addr_status |= PCIBR_BUS_ADDR_IO_FREED; } } #endif /* PIC_LATER */ /* * If the latency timer has already been set, by prom or by the * card itself, use that value. Otherwise look at the device's * 'min_gnt' and attempt to calculate a latency time. * * NOTE: For now if the device is on the 'real time' arbitration * ring we don't set the latency timer. * * WAR: SGI's IOC3 and RAD devices target abort if you write a * single byte into their config space. So don't set the Latency * Timer for these devices */ lt_time = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_LATENCY_TIMER, 1); if ((lt_time == 0) && !(bridge->b_device[slot].reg & BRIDGE_DEV_RT) && !((vendor == IOC3_VENDOR_ID_NUM) && ( #ifdef PIC_LATER (device == IOC3_DEVICE_ID_NUM) || (device == LINC_DEVICE_ID_NUM) || #endif (device == 0x5 /* RAD_DEV */)))) { unsigned min_gnt; unsigned min_gnt_mult; /* 'min_gnt' indicates how long of a burst period a device * needs in increments of 250ns. But latency timer is in * PCI clock cycles, so a conversion is needed. */ min_gnt = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_MIN_GNT, 1); if (IS_133MHZ(pcibr_soft)) min_gnt_mult = 32; /* 250ns @ 133MHz in clocks */ else if (IS_100MHZ(pcibr_soft)) min_gnt_mult = 24; /* 250ns @ 100MHz in clocks */ else if (IS_66MHZ(pcibr_soft)) min_gnt_mult = 16; /* 250ns @ 66MHz, in clocks */ else min_gnt_mult = 8; /* 250ns @ 33MHz, in clocks */ if ((min_gnt != 0) && ((min_gnt * min_gnt_mult) < 256)) lt_time = (min_gnt * min_gnt_mult); else lt_time = 4 * min_gnt_mult; /* 1 micro second */ do_pcibr_config_set(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_LATENCY_TIMER, 1, lt_time); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_CONFIG, pcibr_vhdl, "pcibr_slot_info_init: set Latency Timer for slot=%d, " "func=%d, to 0x%x\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot), func, lt_time)); } /* Get the PCI-X capability if running in PCI-X mode. If the func * doesn't have a pcix capability, allocate a PCIIO_VENDOR_ID_NONE * pcibr_info struct so the device driver for that function is not * called. */ if (IS_PCIX(pcibr_soft)) { if (!(pcix_cap = pcibr_find_capability(cfgw, PCI_CAP_PCIX))) { printk(KERN_WARNING #if defined(SUPPORT_PRINTING_V_FORMAT) "%v: Bus running in PCI-X mode, But card in slot %d, " "func %d not PCI-X capable\n", pcibr_vhdl, slot, func); #else "0x%lx: Bus running in PCI-X mode, But card in slot %d, " "func %d not PCI-X capable\n", (unsigned long)pcibr_vhdl, slot, func); #endif pcibr_device_info_new(pcibr_soft, slot, PCIIO_FUNC_NONE, PCIIO_VENDOR_ID_NONE, PCIIO_DEVICE_ID_NONE); continue; } PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_CONFIG, pcibr_vhdl, "pcibr_slot_info_init: PCI-X capability at 0x%x for " "slot=%d, func=%d\n", pcix_cap, PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot), func)); } else { pcix_cap = NULL; } pcibr_info = pcibr_device_info_new (pcibr_soft, slot, rfunc, vendor, device); /* Keep a running total of the number of PIC-X functions on the bus * and the number of max outstanding split trasnactions that they * have requested. NOTE: "pcix_cap != NULL" implies IS_PCIX() */ pcibr_info->f_pcix_cap = (cap_pcix_type0_t *)pcix_cap; if (pcibr_info->f_pcix_cap) { int max_out; /* max outstanding splittrans from status reg */ pcibr_soft->bs_pcix_num_funcs++; max_out = pcibr_info->f_pcix_cap->pcix_type0_status.max_out_split; pcibr_soft->bs_pcix_split_tot += max_splittrans_to_numbuf[max_out]; } conn_vhdl = pciio_device_info_register(pcibr_vhdl, &pcibr_info->f_c); if (func == 0) slotp->slot_conn = conn_vhdl; cmd_reg = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_COMMAND, 4); wptr = cfgw + PCI_CFG_BASE_ADDR_0 / 4; for (win = 0; win < nbars; ++win) { iopaddr_t base, mask, code; size_t size; /* * GET THE BASE & SIZE OF THIS WINDOW: * * The low two or four bits of the BASE register * determines which address space we are in; the * rest is a base address. BASE registers * determine windows that are power-of-two sized * and naturally aligned, so we can get the size * of a window by writing all-ones to the * register, reading it back, and seeing which * bits are used for decode; the least * significant nonzero bit is also the size of * the window. * * WARNING: someone may already have allocated * some PCI space to this window, and in fact * PIO may be in process at this very moment * from another processor (or even from this * one, if we get interrupted)! So, if the BASE * already has a nonzero address, be generous * and use the LSBit of that address as the * size; this could overstate the window size. * Usually, when one card is set up, all are set * up; so, since we don't bitch about * overlapping windows, we are ok. * * UNFORTUNATELY, some cards do not clear their * BASE registers on reset. I have two heuristics * that can detect such cards: first, if the * decode enable is turned off for the space * that the window uses, we can disregard the * initial value. second, if the address is * outside the range that we use, we can disregard * it as well. * * This is looking very PCI generic. Except for * knowing how many slots and where their config * spaces are, this window loop and the next one * could probably be shared with other PCI host * adapters. It would be interesting to see if * this could be pushed up into pciio, when we * start supporting more PCI providers. */ base = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), wptr, (win * 4), 4); if (base & PCI_BA_IO_SPACE) { /* BASE is in I/O space. */ space = PCIIO_SPACE_IO; mask = -4; code = base & 3; base = base & mask; if (base == 0) { ; /* not assigned */ } else if (!(cmd_reg & PCI_CMD_IO_SPACE)) { base = 0; /* decode not enabled */ } } else { /* BASE is in MEM space. */ space = PCIIO_SPACE_MEM; mask = -16; code = base & PCI_BA_MEM_LOCATION; /* extract BAR type */ base = base & mask; if (base == 0) { ; /* not assigned */ } else if (!(cmd_reg & PCI_CMD_MEM_SPACE)) { base = 0; /* decode not enabled */ } else if (base & 0xC0000000) { base = 0; /* outside permissable range */ } else if ((code == PCI_BA_MEM_64BIT) && (do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), wptr, ((win + 1)*4), 4) != 0)) { base = 0; /* outside permissable range */ } } if (base != 0) { /* estimate size */ size = base & -base; } else { /* calculate size */ do_pcibr_config_set(IS_PIC_SOFT(pcibr_soft), wptr, (win * 4), 4, ~0); /* write 1's */ size = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), wptr, (win * 4), 4); /* read back */ size &= mask; /* keep addr */ size &= -size; /* keep lsbit */ if (size == 0) continue; } pcibr_info->f_window[win].w_space = space; pcibr_info->f_window[win].w_base = base; pcibr_info->f_window[win].w_size = size; #if defined(IOC3_VENDOR_ID_NUM) && defined(IOC3_DEVICE_ID_NUM) /* * IOC3 BASE_ADDR* BUG WORKAROUND * * If we write to BASE1 on the IOC3, the * data in BASE0 is replaced. The * original workaround was to remember * the value of BASE0 and restore it * when we ran off the end of the BASE * registers; however, a later * workaround was added (I think it was * rev 1.44) to avoid setting up * anything but BASE0, with the comment * that writing all ones to BASE1 set * the enable-parity-error test feature * in IOC3's SCR bit 14. * * So, unless we defer doing any PCI * space allocation until drivers * attach, and set up a way for drivers * (the IOC3 in paricular) to tell us * generically to keep our hands off * BASE registers, we gotta "know" about * the IOC3 here. * * Too bad the PCI folks didn't reserve the * all-zero value for 'no BASE here' (it is a * valid code for an uninitialized BASE in * 32-bit PCI memory space). */ if ((vendor == IOC3_VENDOR_ID_NUM) && (device == IOC3_DEVICE_ID_NUM)) break; #endif if (code == PCI_BA_MEM_64BIT) { win++; /* skip upper half */ do_pcibr_config_set(IS_PIC_SOFT(pcibr_soft), wptr, (win * 4), 4, 0); /* must be zero */ } } /* next win */ } /* next func */ return(0); } /* * pcibr_find_capability * Walk the list of capabilities (if it exists) looking for * the requested capability. Return a cfg_p pointer to the * capability if found, else return NULL */ cfg_p pcibr_find_capability(cfg_p cfgw, unsigned capability) { unsigned cap_nxt; unsigned cap_id; int defend_against_circular_linkedlist = 0; /* Check to see if there is a capabilities pointer in the cfg header */ if (!(do_pcibr_config_get(1, cfgw, PCI_CFG_STATUS, 2) & PCI_STAT_CAP_LIST)) { return (NULL); } /* * Read up the capabilities head pointer from the configuration header. * Capabilities are stored as a linked list in the lower 48 dwords of * config space and are dword aligned. (Note: spec states the least two * significant bits of the next pointer must be ignored, so we mask * with 0xfc). */ cap_nxt = (do_pcibr_config_get(1, cfgw, PCI_CAPABILITIES_PTR, 1) & 0xfc); while (cap_nxt && (defend_against_circular_linkedlist <= 48)) { cap_id = do_pcibr_config_get(1, cfgw, cap_nxt, 1); if (cap_id == capability) { return ((cfg_p)((char *)cfgw + cap_nxt)); } cap_nxt = (do_pcibr_config_get(1, cfgw, cap_nxt+1, 1) & 0xfc); defend_against_circular_linkedlist++; } return (NULL); } /* * pcibr_slot_info_free * Remove all the PCI infrastructural information associated * with a particular PCI device. */ int pcibr_slot_info_free(devfs_handle_t pcibr_vhdl, pciio_slot_t slot) { pcibr_soft_t pcibr_soft; pcibr_info_h pcibr_infoh; int nfunc; pcibr_soft = pcibr_soft_get(pcibr_vhdl); if (!pcibr_soft) return(EINVAL); if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); nfunc = pcibr_soft->bs_slot[slot].bss_ninfo; pcibr_device_info_free(pcibr_vhdl, slot); pcibr_infoh = pcibr_soft->bs_slot[slot].bss_infos; DELA(pcibr_infoh,nfunc); pcibr_soft->bs_slot[slot].bss_ninfo = 0; return(0); } /* * pcibr_slot_pcix_rbar_init * Allocate RBARs to the PCI-X functions on a given device */ int pcibr_slot_pcix_rbar_init(pcibr_soft_t pcibr_soft, pciio_slot_t slot) { pcibr_info_h pcibr_infoh; pcibr_info_t pcibr_info; char tmp_str[256]; int nfunc; int func; if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); if ((nfunc = pcibr_soft->bs_slot[slot].bss_ninfo) < 1) return(EINVAL); if (!(pcibr_infoh = pcibr_soft->bs_slot[slot].bss_infos)) return(EINVAL); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_RBAR, pcibr_soft->bs_vhdl, "pcibr_slot_pcix_rbar_init for slot %d\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot))); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_RBAR, pcibr_soft->bs_vhdl, "\tslot/func\trequested\tgiven\tinuse\tavail\n")); for (func = 0; func < nfunc; ++func) { cap_pcix_type0_t *pcix_cap_p; cap_pcix_stat_reg_t *pcix_statreg_p; cap_pcix_cmd_reg_t *pcix_cmdreg_p; int num_rbar; if (!(pcibr_info = pcibr_infoh[func])) continue; if (pcibr_info->f_vendor == PCIIO_VENDOR_ID_NONE) continue; if (!(pcix_cap_p = pcibr_info->f_pcix_cap)) continue; pcix_statreg_p = &pcix_cap_p->pcix_type0_status; pcix_cmdreg_p = &pcix_cap_p->pcix_type0_command; /* If there are enough RBARs to satify the number of "max outstanding * transactions" each function requested (bs_pcix_rbar_percent_allowed * is 100%), then give each function what it requested, otherwise give * the functions a "percentage of what they requested". */ if (pcibr_soft->bs_pcix_rbar_percent_allowed >= 100) { pcix_cmdreg_p->max_split = pcix_statreg_p->max_out_split; num_rbar = max_splittrans_to_numbuf[pcix_cmdreg_p->max_split]; pcibr_soft->bs_pcix_rbar_inuse += num_rbar; pcibr_soft->bs_pcix_rbar_avail -= num_rbar; pcix_cmdreg_p->max_mem_read_cnt = pcix_statreg_p->max_mem_read_cnt; } else { int index; /* index into max_splittrans_to_numbuf table */ int max_out; /* max outstanding transactions given to func */ /* Calculate the percentage of RBARs this function can have. * NOTE: Every function gets at least 1 RBAR (thus the "+1"). * bs_pcix_rbar_percent_allowed is the percentage of what was * requested less this 1 RBAR that all functions automatically * gets */ max_out = ((max_splittrans_to_numbuf[pcix_statreg_p->max_out_split] * pcibr_soft->bs_pcix_rbar_percent_allowed) / 100) + 1; /* round down the newly caclulated max_out to a valid number in * max_splittrans_to_numbuf[] */ for (index = 0; index < MAX_SPLIT_TABLE-1; index++) if (max_splittrans_to_numbuf[index + 1] > max_out) break; pcix_cmdreg_p->max_split = index; num_rbar = max_splittrans_to_numbuf[pcix_cmdreg_p->max_split]; pcibr_soft->bs_pcix_rbar_inuse += num_rbar; pcibr_soft->bs_pcix_rbar_avail -= num_rbar; pcix_cmdreg_p->max_mem_read_cnt = pcix_statreg_p->max_mem_read_cnt; } /* * The kernel only allows functions to have so many variable args, * attempting to call PCIBR_DEBUG_ALWAYS() with more than 5 printf * arguments fails so sprintf() it into a temporary string. */ if (pcibr_debug_mask & PCIBR_DEBUG_RBAR) { sprintf(tmp_str,"\t %d/%d \t %d \t %d \t %d \t %d\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot), func, max_splittrans_to_numbuf[pcix_statreg_p->max_out_split], max_splittrans_to_numbuf[pcix_cmdreg_p->max_split], pcibr_soft->bs_pcix_rbar_inuse, pcibr_soft->bs_pcix_rbar_avail); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_RBAR, pcibr_soft->bs_vhdl, "%s", tmp_str)); } } return(0); } int as_debug = 0; /* * pcibr_slot_addr_space_init * Reserve chunks of PCI address space as required by * the base registers in the card. */ int pcibr_slot_addr_space_init(devfs_handle_t pcibr_vhdl, pciio_slot_t slot) { pcibr_soft_t pcibr_soft; pcibr_info_h pcibr_infoh; pcibr_info_t pcibr_info; bridge_t *bridge; size_t align_slot; iopaddr_t mask; int nbars; int nfunc; int func; int win; int rc = 0; pcibr_soft = pcibr_soft_get(pcibr_vhdl); if (!pcibr_soft) return(EINVAL); if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); bridge = pcibr_soft->bs_base; /* allocate address space, * for windows that have not been * previously assigned. */ if (pcibr_soft->bs_slot[slot].has_host) { return(0); } nfunc = pcibr_soft->bs_slot[slot].bss_ninfo; if (nfunc < 1) return(EINVAL); pcibr_infoh = pcibr_soft->bs_slot[slot].bss_infos; if (!pcibr_infoh) return(EINVAL); /* * Try to make the DevIO windows not * overlap by pushing the "io" and "hi" * allocation areas up to the next one * or two megabyte bound. This also * keeps them from being zero. * * DO NOT do this with "pci_lo" since * the entire "lo" area is only a * megabyte, total ... */ align_slot = (slot < 2) ? 0x200000 : 0x100000; for (func = 0; func < nfunc; ++func) { cfg_p cfgw; cfg_p wptr; pciio_space_t space; iopaddr_t base; size_t size; #ifdef PCI_LATER char tmp_str[256]; #endif unsigned pci_cfg_cmd_reg; unsigned pci_cfg_cmd_reg_add = 0; pcibr_info = pcibr_infoh[func]; if (!pcibr_info) continue; if (pcibr_info->f_vendor == PCIIO_VENDOR_ID_NONE) continue; cfgw = pcibr_func_config_addr(bridge, 0, slot, func, 0); wptr = cfgw + PCI_CFG_BASE_ADDR_0 / 4; if ((do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_HEADER_TYPE, 1) & 0x7f) != 0) nbars = 2; else nbars = PCI_CFG_BASE_ADDRS; for (win = 0; win < nbars; ++win) { space = pcibr_info->f_window[win].w_space; base = pcibr_info->f_window[win].w_base; size = pcibr_info->f_window[win].w_size; if (size < 1) continue; if (base >= size) { /* * The kernel only allows functions to have so many variable * args attempting to call PCIBR_DEBUG_ALWAYS() with more than * 5 printf arguments fails so sprintf() it into a temporary * string (tmp_str). */ #if defined(SUPPORT_PRINTING_R_FORMAT) if (pcibr_debug_mask & PCIBR_DEBUG_BAR) { sprintf(tmp_str, "pcibr_slot_addr_space_init: slot=%d, " "func=%d win %d is in %r [0x%x..0x%x], allocated by " "prom\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot), func, win, space, space_desc, base, base + size - 1); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_BAR, pcibr_vhdl, "%s",tmp_str)); } #endif /* SUPPORT_PRINTING_R_FORMAT */ continue; /* already allocated */ } switch (space) { case PCIIO_SPACE_IO: base = pcibr_bus_addr_alloc(pcibr_soft, &pcibr_info->f_window[win], PCIIO_SPACE_IO, 0, size, align_slot); if (!base) rc = ENOSPC; break; case PCIIO_SPACE_MEM: if ((do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), wptr, (win * 4), 4) & PCI_BA_MEM_LOCATION) == PCI_BA_MEM_1MEG) { int align = size; /* ie. 0x00001000 */ if (align < _PAGESZ) align = _PAGESZ; /* ie. 0x00004000 */ /* allocate from 20-bit PCI space */ base = pcibr_bus_addr_alloc(pcibr_soft, &pcibr_info->f_window[win], PCIIO_SPACE_MEM, 0, size, align); if (!base) rc = ENOSPC; } else { /* allocate from 32-bit or 64-bit PCI space */ base = pcibr_bus_addr_alloc(pcibr_soft, &pcibr_info->f_window[win], PCIIO_SPACE_MEM32, 0, size, align_slot); if (!base) rc = ENOSPC; } break; default: base = 0; PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_BAR, pcibr_vhdl, "pcibr_slot_addr_space_init: slot=%d, window %d " "had bad space code %d\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft,slot), win, space)); } pcibr_info->f_window[win].w_base = base; do_pcibr_config_set(IS_PIC_SOFT(pcibr_soft), wptr, (win * 4), 4, base); #if defined(SUPPORT_PRINTING_R_FORMAT) if (pcibr_debug_mask & PCIBR_DEBUG_BAR) { if (base >= size) { sprintf(tmp_str,"pcibr_slot_addr_space_init: slot=%d, func=" "%d, win %d is in %r[0x%x..0x%x], " "allocated by pcibr\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot), func, win, space, space_desc, base, base + size - 1); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_BAR, pcibr_vhdl, "%s",tmp_str)); } else { sprintf(tmp_str,"pcibr_slot_addr_space_init: slot=%d, func=" "%d, win %d, unable to alloc 0x%x in %r\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot), func, win, size, space, space_desc); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_BAR, pcibr_vhdl, "%s",tmp_str)); } } #endif /* SUPPORT_PRINTING_R_FORMAT */ } /* next base */ /* * Allocate space for the EXPANSION ROM * NOTE: DO NOT DO THIS ON AN IOC3, * as it blows the system away. */ base = size = 0; if ((pcibr_soft->bs_slot[slot].bss_vendor_id != IOC3_VENDOR_ID_NUM) || (pcibr_soft->bs_slot[slot].bss_device_id != IOC3_DEVICE_ID_NUM)) { wptr = cfgw + PCI_EXPANSION_ROM / 4; do_pcibr_config_set(IS_PIC_SOFT(pcibr_soft), wptr, 0, 4, 0xFFFFF000); mask = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), wptr, 0, 4); if (mask & 0xFFFFF000) { size = mask & -mask; base = pcibr_bus_addr_alloc(pcibr_soft, &pcibr_info->f_rwindow, PCIIO_SPACE_MEM32, 0, size, align_slot); if (!base) rc = ENOSPC; else { do_pcibr_config_set(IS_PIC_SOFT(pcibr_soft), wptr, 0, 4, base); PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_BAR, pcibr_vhdl, "pcibr_slot_addr_space_init: slot=%d, func=%d, " "ROM in [0x%X..0x%X], allocated by pcibr\n", PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot), func, base, base + size - 1)); } } } pcibr_info->f_rbase = base; pcibr_info->f_rsize = size; /* * if necessary, update the board's * command register to enable decoding * in the windows we added. * * There are some bits we always want to * be sure are set. */ pci_cfg_cmd_reg_add |= PCI_CMD_IO_SPACE; /* * The Adaptec 1160 FC Controller WAR #767995: * The part incorrectly ignores the upper 32 bits of a 64 bit * address when decoding references to its registers so to * keep it from responding to a bus cycle that it shouldn't * we only use I/O space to get at it's registers. Don't * enable memory space accesses on that PCI device. */ #define FCADP_VENDID 0x9004 /* Adaptec Vendor ID from fcadp.h */ #define FCADP_DEVID 0x1160 /* Adaptec 1160 Device ID from fcadp.h */ if ((pcibr_info->f_vendor != FCADP_VENDID) || (pcibr_info->f_device != FCADP_DEVID)) pci_cfg_cmd_reg_add |= PCI_CMD_MEM_SPACE; pci_cfg_cmd_reg_add |= PCI_CMD_BUS_MASTER; pci_cfg_cmd_reg = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_COMMAND, 4); #if PCI_FBBE /* XXX- check here to see if dev can do fast-back-to-back */ if (!((pci_cfg_cmd_reg >> 16) & PCI_STAT_F_BK_BK_CAP)) fast_back_to_back_enable = 0; #endif pci_cfg_cmd_reg &= 0xFFFF; if (pci_cfg_cmd_reg_add & ~pci_cfg_cmd_reg) do_pcibr_config_set(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_COMMAND, 4, pci_cfg_cmd_reg | pci_cfg_cmd_reg_add); } /* next func */ return(rc); } /* * pcibr_slot_device_init * Setup the device register in the bridge for this PCI slot. */ int pcibr_slot_device_init(devfs_handle_t pcibr_vhdl, pciio_slot_t slot) { pcibr_soft_t pcibr_soft; bridge_t *bridge; bridgereg_t devreg; pcibr_soft = pcibr_soft_get(pcibr_vhdl); if (!pcibr_soft) return(EINVAL); if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); bridge = pcibr_soft->bs_base; /* * Adjustments to Device(x) * and init of bss_device shadow */ devreg = bridge->b_device[slot].reg; devreg &= ~BRIDGE_DEV_PAGE_CHK_DIS; /* * PIC WAR. PV# 855271 * Don't enable virtual channels in the PIC by default. * Can cause problems with 32-bit devices. (The bit is only intended * for 64-bit devices). We set the bit in pcibr_try_set_device() * if we're 64-bit and requesting virtual channels. */ if (IS_PIC_SOFT(pcibr_soft) && PCIBR_WAR_ENABLED(PV855271, pcibr_soft)) devreg |= BRIDGE_DEV_COH; else devreg |= BRIDGE_DEV_COH | BRIDGE_DEV_VIRTUAL_EN; pcibr_soft->bs_slot[slot].bss_device = devreg; bridge->b_device[slot].reg = devreg; #ifdef PIC_LATER PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DEVREG, pcibr_vhdl, "pcibr_slot_device_init: Device(%d): %R\n", slot, devreg, device_bits)); #else printk("pcibr_slot_device_init: Device(%d) 0x%x\n", slot, devreg); #endif return(0); } /* * pcibr_slot_guest_info_init * Setup the host/guest relations for a PCI slot. */ int pcibr_slot_guest_info_init(devfs_handle_t pcibr_vhdl, pciio_slot_t slot) { pcibr_soft_t pcibr_soft; pcibr_info_h pcibr_infoh; pcibr_info_t pcibr_info; pcibr_soft_slot_t slotp; pcibr_soft = pcibr_soft_get(pcibr_vhdl); if (!pcibr_soft) return(EINVAL); if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); slotp = &pcibr_soft->bs_slot[slot]; /* create info and verticies for guest slots; * for compatibilitiy macros, create info * for even unpopulated slots (but do not * build verticies for them). */ if (pcibr_soft->bs_slot[slot].bss_ninfo < 1) { NEWA(pcibr_infoh, 1); pcibr_soft->bs_slot[slot].bss_ninfo = 1; pcibr_soft->bs_slot[slot].bss_infos = pcibr_infoh; pcibr_info = pcibr_device_info_new (pcibr_soft, slot, PCIIO_FUNC_NONE, PCIIO_VENDOR_ID_NONE, PCIIO_DEVICE_ID_NONE); if (pcibr_soft->bs_slot[slot].has_host) { slotp->slot_conn = pciio_device_info_register (pcibr_vhdl, &pcibr_info->f_c); } } /* generate host/guest relations */ if (pcibr_soft->bs_slot[slot].has_host) { int host = pcibr_soft->bs_slot[slot].host_slot; pcibr_soft_slot_t host_slotp = &pcibr_soft->bs_slot[host]; hwgraph_edge_add(slotp->slot_conn, host_slotp->slot_conn, EDGE_LBL_HOST); /* XXX- only gives us one guest edge per * host. If/when we have a host with more than * one guest, we will need to figure out how * the host finds all its guests, and sorts * out which one is which. */ hwgraph_edge_add(host_slotp->slot_conn, slotp->slot_conn, EDGE_LBL_GUEST); } return(0); } /* * pcibr_slot_call_device_attach * This calls the associated driver attach routine for the PCI * card in this slot. */ int pcibr_slot_call_device_attach(devfs_handle_t pcibr_vhdl, pciio_slot_t slot, int drv_flags) { pcibr_soft_t pcibr_soft; pcibr_info_h pcibr_infoh; pcibr_info_t pcibr_info; async_attach_t aa = NULL; int func; devfs_handle_t xconn_vhdl, conn_vhdl; #ifdef PIC_LATER devfs_handle_t scsi_vhdl; #endif int nfunc; int error_func; int error_slot = 0; int error = ENODEV; #ifdef PIC_LATER int hwg_err; #endif pcibr_soft = pcibr_soft_get(pcibr_vhdl); if (!pcibr_soft) return(EINVAL); if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); if (pcibr_soft->bs_slot[slot].has_host) { return(EPERM); } xconn_vhdl = pcibr_soft->bs_conn; aa = async_attach_get_info(xconn_vhdl); nfunc = pcibr_soft->bs_slot[slot].bss_ninfo; pcibr_infoh = pcibr_soft->bs_slot[slot].bss_infos; for (func = 0; func < nfunc; ++func) { pcibr_info = pcibr_infoh[func]; if (!pcibr_info) continue; if (pcibr_info->f_vendor == PCIIO_VENDOR_ID_NONE) continue; conn_vhdl = pcibr_info->f_vertex; #ifdef LATER /* * Activate if and when we support cdl. */ if (aa) async_attach_add_info(conn_vhdl, aa); #endif /* LATER */ error_func = pciio_device_attach(conn_vhdl, drv_flags); #ifdef PIC_LATER /* * Try to assign well-known SCSI controller numbers for hot-plug * insert */ if (drv_flags) { hwg_err = hwgraph_path_lookup(conn_vhdl, EDGE_LBL_SCSI_CTLR "/0", &scsi_vhdl, NULL); if (hwg_err == GRAPH_SUCCESS) scsi_ctlr_nums_add(baseio_pci_vhdl, scsi_vhdl); /* scsi_vhdl will be the final vertex in either the complete path * on success or a partial path on failure; in either case, * unreference that vertex. */ hwgraph_vertex_unref(scsi_vhdl); hwg_err = hwgraph_path_lookup(conn_vhdl, EDGE_LBL_SCSI_CTLR "/1", &scsi_vhdl, NULL); if (hwg_err == GRAPH_SUCCESS) scsi_ctlr_nums_add(baseio_pci_vhdl, scsi_vhdl); /* scsi_vhdl will be the final vertex in either the complete path * on success or a partial path on failure; in either case, * unreference that vertex. */ hwgraph_vertex_unref(scsi_vhdl); } #endif /* PIC_LATER */ pcibr_info->f_att_det_error = error_func; if (error_func) error_slot = error_func; error = error_slot; } /* next func */ if (error) { if ((error != ENODEV) && (error != EUNATCH) && (error != EPERM)) { pcibr_soft->bs_slot[slot].slot_status &= ~SLOT_STATUS_MASK; pcibr_soft->bs_slot[slot].slot_status |= SLOT_STARTUP_INCMPLT; } } else { pcibr_soft->bs_slot[slot].slot_status &= ~SLOT_STATUS_MASK; pcibr_soft->bs_slot[slot].slot_status |= SLOT_STARTUP_CMPLT; } return(error); } /* * pcibr_slot_call_device_detach * This calls the associated driver detach routine for the PCI * card in this slot. */ int pcibr_slot_call_device_detach(devfs_handle_t pcibr_vhdl, pciio_slot_t slot, int drv_flags) { pcibr_soft_t pcibr_soft; pcibr_info_h pcibr_infoh; pcibr_info_t pcibr_info; int func; devfs_handle_t conn_vhdl = GRAPH_VERTEX_NONE; int nfunc; int error_func; int error_slot = 0; int error = ENODEV; pcibr_soft = pcibr_soft_get(pcibr_vhdl); if (!pcibr_soft) return(EINVAL); if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); if (pcibr_soft->bs_slot[slot].has_host) return(EPERM); nfunc = pcibr_soft->bs_slot[slot].bss_ninfo; pcibr_infoh = pcibr_soft->bs_slot[slot].bss_infos; for (func = 0; func < nfunc; ++func) { pcibr_info = pcibr_infoh[func]; if (!pcibr_info) continue; if (pcibr_info->f_vendor == PCIIO_VENDOR_ID_NONE) continue; if (IS_PCIX(pcibr_soft) && pcibr_info->f_pcix_cap) { int max_out; pcibr_soft->bs_pcix_num_funcs--; max_out = pcibr_info->f_pcix_cap->pcix_type0_status.max_out_split; pcibr_soft->bs_pcix_split_tot -= max_splittrans_to_numbuf[max_out]; } conn_vhdl = pcibr_info->f_vertex; error_func = pciio_device_detach(conn_vhdl, drv_flags); pcibr_info->f_att_det_error = error_func; if (error_func) error_slot = error_func; error = error_slot; } /* next func */ if (error) { if ((error != ENODEV) && (error != EUNATCH) && (error != EPERM)) { pcibr_soft->bs_slot[slot].slot_status &= ~SLOT_STATUS_MASK; pcibr_soft->bs_slot[slot].slot_status |= SLOT_SHUTDOWN_INCMPLT; } } else { if (conn_vhdl != GRAPH_VERTEX_NONE) pcibr_device_unregister(conn_vhdl); pcibr_soft->bs_slot[slot].slot_status &= ~SLOT_STATUS_MASK; pcibr_soft->bs_slot[slot].slot_status |= SLOT_SHUTDOWN_CMPLT; } return(error); } /* * pcibr_slot_attach * This is a place holder routine to keep track of all the * slot-specific initialization that needs to be done. * This is usually called when we want to initialize a new * PCI card on the bus. */ int pcibr_slot_attach(devfs_handle_t pcibr_vhdl, pciio_slot_t slot, int drv_flags, char *l1_msg, int *sub_errorp) { pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl); #ifdef PIC_LATER timespec_t ts; #endif int error; /* Do not allow a multi-function card to be hot-plug inserted */ if (pcibr_soft->bs_slot[slot].bss_ninfo > 1) { if (sub_errorp) *sub_errorp = EPERM; return(PCI_MULTI_FUNC_ERR); } /* Call the device attach */ error = pcibr_slot_call_device_attach(pcibr_vhdl, slot, drv_flags); if (error) { if (sub_errorp) *sub_errorp = error; if (error == EUNATCH) return(PCI_NO_DRIVER); else return(PCI_SLOT_DRV_ATTACH_ERR); } return(0); } /* * pcibr_slot_detach * This is a place holder routine to keep track of all the * slot-specific freeing that needs to be done. */ int pcibr_slot_detach(devfs_handle_t pcibr_vhdl, pciio_slot_t slot, int drv_flags, char *l1_msg, int *sub_errorp) { pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl); int error; /* Make sure that we do not detach a system critical function vertex */ if(pcibr_is_slot_sys_critical(pcibr_vhdl, slot)) return(PCI_IS_SYS_CRITICAL); /* Call the device detach function */ error = (pcibr_slot_call_device_detach(pcibr_vhdl, slot, drv_flags)); if (error) { if (sub_errorp) *sub_errorp = error; return(PCI_SLOT_DRV_DETACH_ERR); } /* Recalculate the RBARs for all the devices on the bus since we've * just freed some up and some of the devices could use them. */ if (IS_PCIX(pcibr_soft)) { int tmp_slot; pcibr_soft->bs_pcix_rbar_inuse = 0; pcibr_soft->bs_pcix_rbar_avail = NUM_RBAR; pcibr_soft->bs_pcix_rbar_percent_allowed = pcibr_pcix_rbars_calc(pcibr_soft); for (tmp_slot = pcibr_soft->bs_min_slot; tmp_slot < PCIBR_NUM_SLOTS(pcibr_soft); ++tmp_slot) (void)pcibr_slot_pcix_rbar_init(pcibr_soft, tmp_slot); } return (0); } /* * pcibr_is_slot_sys_critical * Check slot for any functions that are system critical. * Return 1 if any are system critical or 0 otherwise. * * This function will always return 0 when called by * pcibr_attach() because the system critical vertices * have not yet been set in the hwgraph. */ int pcibr_is_slot_sys_critical(devfs_handle_t pcibr_vhdl, pciio_slot_t slot) { pcibr_soft_t pcibr_soft; pcibr_info_h pcibr_infoh; pcibr_info_t pcibr_info; devfs_handle_t conn_vhdl = GRAPH_VERTEX_NONE; int nfunc; int func; boolean_t is_sys_critical_vertex(devfs_handle_t); pcibr_soft = pcibr_soft_get(pcibr_vhdl); if (!pcibr_soft) return(EINVAL); if (!PCIBR_VALID_SLOT(pcibr_soft, slot)) return(EINVAL); nfunc = pcibr_soft->bs_slot[slot].bss_ninfo; pcibr_infoh = pcibr_soft->bs_slot[slot].bss_infos; for (func = 0; func < nfunc; ++func) { pcibr_info = pcibr_infoh[func]; if (!pcibr_info) continue; if (pcibr_info->f_vendor == PCIIO_VENDOR_ID_NONE) continue; conn_vhdl = pcibr_info->f_vertex; if (is_sys_critical_vertex(conn_vhdl)) { #if defined(SUPPORT_PRINTING_V_FORMAT) printk(KERN_WARNING "%v is a system critical device vertex\n", conn_vhdl); #else printk(KERN_WARNING "%p is a system critical device vertex\n", (void *)conn_vhdl); #endif return(1); } } return(0); } /* * pcibr_probe_slot_pic: read a config space word * while trapping any errors; return zero if * all went OK, or nonzero if there was an error. * The value read, if any, is passed back * through the valp parameter. */ static int pcibr_probe_slot_pic(bridge_t *bridge, cfg_p cfg, unsigned *valp) { int rv; picreg_t p_old_enable = (picreg_t)0, p_new_enable; extern int badaddr_val(volatile void *, int, volatile void *); p_old_enable = bridge->p_int_enable_64; p_new_enable = p_old_enable & ~(BRIDGE_IMR_PCI_MST_TIMEOUT | PIC_ISR_PCIX_MTOUT); bridge->p_int_enable_64 = p_new_enable; if (bridge->p_err_int_view_64 & (BRIDGE_ISR_PCI_MST_TIMEOUT | PIC_ISR_PCIX_MTOUT)) bridge->p_int_rst_stat_64 = BRIDGE_IRR_MULTI_CLR; if (bridge->p_int_status_64 & (BRIDGE_IRR_PCI_GRP | PIC_PCIX_GRP_CLR)) { bridge->p_int_rst_stat_64 = (BRIDGE_IRR_PCI_GRP_CLR | PIC_PCIX_GRP_CLR); (void) bridge->b_wid_tflush; /* flushbus */ } rv = badaddr_val((void *) cfg, 4, valp); if (bridge->p_err_int_view_64 & (BRIDGE_ISR_PCI_MST_TIMEOUT | PIC_ISR_PCIX_MTOUT)) { bridge->p_int_rst_stat_64 = BRIDGE_IRR_MULTI_CLR; rv = 1; /* unoccupied slot */ } bridge->p_int_enable_64 = p_old_enable; bridge->b_wid_tflush; /* wait until Bridge PIO complete */ return(rv); } /* * pcibr_probe_slot_non_pic: read a config space word * while trapping any errors; return zero if * all went OK, or nonzero if there was an error. * The value read, if any, is passed back * through the valp parameter. */ static int pcibr_probe_slot_non_pic(bridge_t *bridge, cfg_p cfg, unsigned *valp) { int rv; bridgereg_t b_old_enable = (bridgereg_t)0, b_new_enable = (bridgereg_t)0; extern int badaddr_val(volatile void *, int, volatile void *); b_old_enable = bridge->b_int_enable; b_new_enable = b_old_enable & ~BRIDGE_IMR_PCI_MST_TIMEOUT; bridge->b_int_enable = b_new_enable; /* * The xbridge doesn't clear b_err_int_view unless * multi-err is cleared... */ if (is_xbridge(bridge)) { if (bridge->b_err_int_view & BRIDGE_ISR_PCI_MST_TIMEOUT) bridge->b_int_rst_stat = BRIDGE_IRR_MULTI_CLR; } if (bridge->b_int_status & BRIDGE_IRR_PCI_GRP) { bridge->b_int_rst_stat = BRIDGE_IRR_PCI_GRP_CLR; (void) bridge->b_wid_tflush; /* flushbus */ } rv = badaddr_val((void *) (((uint64_t)cfg) ^ 4), 4, valp); /* * The xbridge doesn't set master timeout in b_int_status * here. Fortunately it's in error_interrupt_view. */ if (is_xbridge(bridge)) { if (bridge->b_err_int_view & BRIDGE_ISR_PCI_MST_TIMEOUT) { bridge->b_int_rst_stat = BRIDGE_IRR_MULTI_CLR; rv = 1; /* unoccupied slot */ } } bridge->b_int_enable = b_old_enable; bridge->b_wid_tflush; /* wait until Bridge PIO complete */ return(rv); } /* * pcibr_probe_slot: read a config space word * while trapping any errors; return zero if * all went OK, or nonzero if there was an error. * The value read, if any, is passed back * through the valp parameter. */ static int pcibr_probe_slot(bridge_t *bridge, cfg_p cfg, unsigned *valp) { if ( is_pic(bridge) ) return(pcibr_probe_slot_pic(bridge, cfg, valp)); else return(pcibr_probe_slot_non_pic(bridge, cfg, valp)); } void pcibr_device_info_free(devfs_handle_t pcibr_vhdl, pciio_slot_t slot) { pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl); pcibr_info_t pcibr_info; pciio_function_t func; pcibr_soft_slot_t slotp = &pcibr_soft->bs_slot[slot]; bridge_t *bridge = pcibr_soft->bs_base; cfg_p cfgw; int nfunc = slotp->bss_ninfo; int bar; int devio_index; int s; unsigned cmd_reg; for (func = 0; func < nfunc; func++) { pcibr_info = slotp->bss_infos[func]; if (!pcibr_info) continue; s = pcibr_lock(pcibr_soft); /* Disable memory and I/O BARs */ cfgw = pcibr_func_config_addr(bridge, 0, slot, func, 0); cmd_reg = do_pcibr_config_get(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_COMMAND, 4); cmd_reg &= (PCI_CMD_MEM_SPACE | PCI_CMD_IO_SPACE); do_pcibr_config_set(IS_PIC_SOFT(pcibr_soft), cfgw, PCI_CFG_COMMAND, 4, cmd_reg); for (bar = 0; bar < PCI_CFG_BASE_ADDRS; bar++) { if (pcibr_info->f_window[bar].w_space == PCIIO_SPACE_NONE) continue; /* Free the PCI bus space */ pciibr_bus_addr_free(pcibr_soft, &pcibr_info->f_window[bar]); /* Get index of the DevIO(x) register used to access this BAR */ devio_index = pcibr_info->f_window[bar].w_devio_index; /* On last use, clear the DevIO(x) used to access this BAR */ if (! --pcibr_soft->bs_slot[devio_index].bss_devio.bssd_ref_cnt) { pcibr_soft->bs_slot[devio_index].bss_devio.bssd_space = PCIIO_SPACE_NONE; pcibr_soft->bs_slot[devio_index].bss_devio.bssd_base = PCIBR_D32_BASE_UNSET; pcibr_soft->bs_slot[devio_index].bss_device = 0; } } /* Free the Expansion ROM PCI bus space */ if(pcibr_info->f_rbase && pcibr_info->f_rsize) { pciibr_bus_addr_free(pcibr_soft, &pcibr_info->f_rwindow); } pcibr_unlock(pcibr_soft, s); slotp->bss_infos[func] = 0; pciio_device_info_unregister(pcibr_vhdl, &pcibr_info->f_c); pciio_device_info_free(&pcibr_info->f_c); DEL(pcibr_info); } /* Reset the mapping usage counters */ slotp->bss_pmu_uctr = 0; slotp->bss_d32_uctr = 0; slotp->bss_d64_uctr = 0; /* Clear the Direct translation info */ slotp->bss_d64_base = PCIBR_D64_BASE_UNSET; slotp->bss_d64_flags = 0; slotp->bss_d32_base = PCIBR_D32_BASE_UNSET; slotp->bss_d32_flags = 0; /* Clear out shadow info necessary for the external SSRAM workaround */ slotp->bss_ext_ates_active = ATOMIC_INIT(0); slotp->bss_cmd_pointer = 0; slotp->bss_cmd_shadow = 0; } iopaddr_t pcibr_bus_addr_alloc(pcibr_soft_t pcibr_soft, pciio_win_info_t win_info_p, pciio_space_t space, int start, int size, int align) { pciio_win_map_t win_map_p; switch (space) { case PCIIO_SPACE_IO: win_map_p = &pcibr_soft->bs_io_win_map; break; case PCIIO_SPACE_MEM: win_map_p = &pcibr_soft->bs_swin_map; break; case PCIIO_SPACE_MEM32: win_map_p = &pcibr_soft->bs_mem_win_map; break; default: return 0; } return pciio_device_win_alloc(win_map_p, win_info_p ? &win_info_p->w_win_alloc : NULL, start, size, align); } void pciibr_bus_addr_free(pcibr_soft_t pcibr_soft, pciio_win_info_t win_info_p) { pciio_device_win_free(&win_info_p->w_win_alloc); } /* * given a vertex_hdl to the pcibr_vhdl, return the brick's bus number * associated with that vertex_hdl. The true mapping happens from the * io_brick_tab[] array defined in ml/SN/iograph.c */ int pcibr_widget_to_bus(devfs_handle_t pcibr_vhdl) { pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl); xwidgetnum_t widget = pcibr_soft->bs_xid; int bricktype = pcibr_soft->bs_bricktype; int bus = pcibr_soft->bs_busnum; /* * For PIC there are 2 busses per widget and pcibr_soft->bs_busnum * will be 0 or 1. For [X]BRIDGE there is 1 bus per widget and * pcibr_soft->bs_busnum will always be zero. So we add bs_busnum * to what io_brick_map_widget returns to get the bus number. */ if ((bus += io_brick_map_widget(bricktype, widget)) > 0) { return bus; } else { return 0; } }