/* Copyright 2013-2016 IBM Corp. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or * implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* * PHB4 support * */ /* * * FIXME: * More stuff for EEH support: * - PBCQ error reporting interrupt * - I2C-based power management (replacing SHPC) * - Directly detect fenced PHB through one dedicated HW reg */ #undef NO_ASB #undef LOG_CFG #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 /* Enable this to disable error interrupts for debug purposes */ #define DISABLE_ERR_INTS static void phb4_init_hw(struct phb4 *p, bool first_init); #define PHBDBG(p, fmt, a...) prlog(PR_DEBUG, "PHB#%04x[%d:%d]: " fmt, \ (p)->phb.opal_id, (p)->chip_id, \ (p)->index, ## a) #define PHBINF(p, fmt, a...) prlog(PR_INFO, "PHB#%04x[%d:%d]: " fmt, \ (p)->phb.opal_id, (p)->chip_id, \ (p)->index, ## a) #define PHBERR(p, fmt, a...) prlog(PR_ERR, "PHB#%04x[%d:%d]: " fmt, \ (p)->phb.opal_id, (p)->chip_id, \ (p)->index, ## a) #ifdef LOG_CFG #define PHBLOGCFG(p, fmt, a...) PHBDBG(p, fmt, ## a) #else #define PHBLOGCFG(p, fmt, a...) do {} while (0) #endif /* Note: The "ASB" name is historical, practically this means access via * the XSCOM backdoor */ static inline uint64_t phb4_read_reg_asb(struct phb4 *p, uint32_t offset) { #ifdef NO_ASB return in_be64(p->regs + offset); #else int64_t rc; uint64_t addr, val; /* Address register: must use 4 bytes for built-in config space. * * This path isn't usable for outbound configuration space */ if ((offset & 0xfffffffc) == PHB_CONFIG_DATA) { PHBERR(p, "XSCOM access to CONFIG_DATA unsupported\n"); return -1ull; } addr = XETU_HV_IND_ADDR_VALID | offset; if (offset >= 0x1000 && offset < 0x1800) addr |= XETU_HV_IND_ADDR_4B; rc = xscom_write(p->chip_id, p->etu_xscom + XETU_HV_IND_ADDRESS, addr); if (rc != 0) { PHBERR(p, "XSCOM error addressing register 0x%x\n", offset); return -1ull; } rc = xscom_read(p->chip_id, p->etu_xscom + XETU_HV_IND_DATA, &val); if (rc != 0) { PHBERR(p, "XSCOM error reading register 0x%x\n", offset); return -1ull; } return val; #endif } static inline void phb4_write_reg_asb(struct phb4 *p, uint32_t offset, uint64_t val) { #ifdef NO_ASB out_be64(p->regs + offset, val); #else int64_t rc; uint64_t addr; /* Address register: must use 4 bytes for built-in config space. * * This path isn't usable for outbound configuration space */ if ((offset & 0xfffffffc) == PHB_CONFIG_DATA) { PHBERR(p, "XSCOM access to CONFIG_DATA unsupported\n"); return; } addr = XETU_HV_IND_ADDR_VALID | offset; if (offset >= 0x1000 && offset < 0x1800) addr |= XETU_HV_IND_ADDR_4B; rc = xscom_write(p->chip_id, p->etu_xscom + XETU_HV_IND_ADDRESS, addr); if (rc != 0) { PHBERR(p, "XSCOM error addressing register 0x%x\n", offset); return; } rc = xscom_write(p->chip_id, p->etu_xscom + XETU_HV_IND_DATA, val); if (rc != 0) { PHBERR(p, "XSCOM error writing register 0x%x\n", offset); return; } #endif } /* Helper to select an IODA table entry */ static inline void phb4_ioda_sel(struct phb4 *p, uint32_t table, uint32_t addr, bool autoinc) { out_be64(p->regs + PHB_IODA_ADDR, (autoinc ? PHB_IODA_AD_AUTOINC : 0) | SETFIELD(PHB_IODA_AD_TSEL, 0ul, table) | SETFIELD(PHB_IODA_AD_TADR, 0ul, addr)); } /* Check if AIB is fenced via PBCQ NFIR */ static bool phb4_fenced(struct phb4 *p) { uint64_t nfir; xscom_read(p->chip_id, p->pe_stk_xscom + 0x0, &nfir); if (nfir & PPC_BIT(16)) { p->flags |= PHB4_AIB_FENCED; p->state = PHB4_STATE_FENCED; return true; } return false; } /* * Configuration space access * * The PHB lock is assumed to be already held */ static int64_t phb4_pcicfg_check(struct phb4 *p, uint32_t bdfn, uint32_t offset, uint32_t size, uint8_t *pe) { uint32_t sm = size - 1; if (offset > 0xfff || bdfn > 0xffff) return OPAL_PARAMETER; if (offset & sm) return OPAL_PARAMETER; /* The root bus only has a device at 0 and we get into an * error state if we try to probe beyond that, so let's * avoid that and just return an error to Linux */ if ((bdfn >> 8) == 0 && (bdfn & 0xff)) return OPAL_HARDWARE; /* Check PHB state */ if (p->state == PHB4_STATE_BROKEN) return OPAL_HARDWARE; /* Fetch the PE# from cache */ *pe = p->rte_cache[bdfn]; return OPAL_SUCCESS; } static int64_t phb4_rc_read(struct phb4 *p, uint32_t offset, uint8_t sz, void *data) { uint32_t reg = offset & ~3; uint32_t oval; /* Some registers are handled locally */ switch (reg) { /* Bridge base/limit registers are cached here as HW * doesn't implement them (it hard codes values that * will confuse a proper PCI implementation). */ case PCI_CFG_MEM_BASE: /* Includes PCI_CFG_MEM_LIMIT */ oval = p->rc_cache[(reg - 0x20) >> 2] & 0xfff0fff0; break; case PCI_CFG_PREF_MEM_BASE: /* Includes PCI_CFG_PREF_MEM_LIMIT */ oval = p->rc_cache[(reg - 0x20) >> 2] & 0xfff0fff0; oval |= 0x00010001; break; case PCI_CFG_IO_BASE_U16: /* Includes PCI_CFG_IO_LIMIT_U16 */ oval = 0; break; case PCI_CFG_PREF_MEM_BASE_U32: case PCI_CFG_PREF_MEM_LIMIT_U32: oval = p->rc_cache[(reg - 0x20) >> 2]; break; default: oval = 0xffffffff; /* default if offset too big */ if (reg < PHB_RC_CONFIG_SIZE) /* XXX Add ASB support ? */ oval = in_le32(p->regs + PHB_RC_CONFIG_BASE + reg); } switch (sz) { case 1: offset &= 3; *((uint8_t *)data) = (oval >> (offset << 3)) & 0xff; break; case 2: offset &= 2; *((uint16_t *)data) = (oval >> (offset << 3)) & 0xffff; break; case 4: *((uint32_t *)data) = oval; break; default: assert(false); } return OPAL_SUCCESS; } static int64_t phb4_rc_write(struct phb4 *p, uint32_t offset, uint8_t sz, uint32_t val) { uint32_t reg = offset & ~3; uint32_t old, mask, shift; int64_t rc; if (reg > PHB_RC_CONFIG_SIZE) return OPAL_SUCCESS; /* If size isn't 4-bytes, do a RMW cycle * * XXX TODO: Filter out registers that do write-1-to-clear !!! */ if (sz < 4) { rc = phb4_rc_read(p, reg, 4, &old); if (rc != OPAL_SUCCESS) return rc; if (sz == 1) { shift = (offset & 3) << 3; mask = 0xff << shift; val = (old & ~mask) | ((val & 0xff) << shift); } else { shift = (offset & 2) << 3; mask = 0xffff << shift; val = (old & ~mask) | ((val & 0xffff) << shift); } } /* Some registers are handled locally */ switch (reg) { /* See comment in phb4_rc_read() */ case PCI_CFG_MEM_BASE: /* Includes PCI_CFG_MEM_LIMIT */ case PCI_CFG_PREF_MEM_BASE: /* Includes PCI_CFG_PREF_MEM_LIMIT */ case PCI_CFG_PREF_MEM_BASE_U32: case PCI_CFG_PREF_MEM_LIMIT_U32: p->rc_cache[(reg - 0x20) >> 2] = val; break; case PCI_CFG_IO_BASE_U16: /* Includes PCI_CFG_IO_LIMIT_U16 */ break; default: /* XXX Add ASB support ? */ /* Workaround PHB config space enable */ if ((p->rev == PHB4_REV_NIMBUS_DD10) && (reg == PCI_CFG_CMD)) val |= PCI_CFG_CMD_MEM_EN | PCI_CFG_CMD_BUS_MASTER_EN; out_le32(p->regs + PHB_RC_CONFIG_BASE + reg, val); } return OPAL_SUCCESS; } static int64_t phb4_pcicfg_read(struct phb4 *p, uint32_t bdfn, uint32_t offset, uint32_t size, void *data) { uint64_t addr, val64; int64_t rc; uint8_t pe; bool use_asb = false; rc = phb4_pcicfg_check(p, bdfn, offset, size, &pe); if (rc) return rc; if (p->flags & PHB4_AIB_FENCED) { if (!(p->flags & PHB4_CFG_USE_ASB)) return OPAL_HARDWARE; use_asb = true; } else if ((p->flags & PHB4_CFG_BLOCKED) && bdfn != 0) { return OPAL_HARDWARE; } /* Handle per-device filters */ rc = pci_handle_cfg_filters(&p->phb, bdfn, offset, size, (uint32_t *)data, false); if (rc != OPAL_PARTIAL) return rc; /* Handle root complex MMIO based config space */ if (bdfn == 0) return phb4_rc_read(p, offset, size, data); addr = PHB_CA_ENABLE; addr = SETFIELD(PHB_CA_BDFN, addr, bdfn); addr = SETFIELD(PHB_CA_REG, addr, offset & ~3u); addr = SETFIELD(PHB_CA_PE, addr, pe); if (use_asb) { phb4_write_reg_asb(p, PHB_CONFIG_ADDRESS, addr); sync(); val64 = bswap_64(phb4_read_reg_asb(p, PHB_CONFIG_DATA)); switch(size) { case 1: *((uint8_t *)data) = val64 >> (8 * (offset & 3)); break; case 2: *((uint16_t *)data) = val64 >> (8 * (offset & 2)); break; case 4: *((uint32_t *)data) = val64; break; default: return OPAL_PARAMETER; } } else { out_be64(p->regs + PHB_CONFIG_ADDRESS, addr); switch(size) { case 1: *((uint8_t *)data) = in_8(p->regs + PHB_CONFIG_DATA + (offset & 3)); PHBLOGCFG(p, "CFG8 Rd %02x=%02x\n", offset, *((uint8_t *)data)); break; case 2: *((uint16_t *)data) = in_le16(p->regs + PHB_CONFIG_DATA + (offset & 2)); PHBLOGCFG(p, "CFG16 Rd %02x=%04x\n", offset, *((uint16_t *)data)); break; case 4: *((uint32_t *)data) = in_le32(p->regs + PHB_CONFIG_DATA); PHBLOGCFG(p, "CFG32 Rd %02x=%08x\n", offset, *((uint32_t *)data)); break; default: return OPAL_PARAMETER; } } return OPAL_SUCCESS; } #define PHB4_PCI_CFG_READ(size, type) \ static int64_t phb4_pcicfg_read##size(struct phb *phb, uint32_t bdfn, \ uint32_t offset, type *data) \ { \ struct phb4 *p = phb_to_phb4(phb); \ \ /* Initialize data in case of error */ \ *data = (type)0xffffffff; \ return phb4_pcicfg_read(p, bdfn, offset, sizeof(type), data); \ } static int64_t phb4_pcicfg_write(struct phb4 *p, uint32_t bdfn, uint32_t offset, uint32_t size, uint32_t data) { uint64_t addr; int64_t rc; uint8_t pe; bool use_asb = false; rc = phb4_pcicfg_check(p, bdfn, offset, size, &pe); if (rc) return rc; if (p->flags & PHB4_AIB_FENCED) { if (!(p->flags & PHB4_CFG_USE_ASB)) return OPAL_HARDWARE; use_asb = true; } else if ((p->flags & PHB4_CFG_BLOCKED) && bdfn != 0) { return OPAL_HARDWARE; } /* Handle per-device filters */ rc = pci_handle_cfg_filters(&p->phb, bdfn, offset, size, (uint32_t *)&data, true); if (rc != OPAL_PARTIAL) return rc; /* Handle root complex MMIO based config space */ if (bdfn == 0) return phb4_rc_write(p, offset, size, data); addr = PHB_CA_ENABLE; addr = SETFIELD(PHB_CA_BDFN, addr, bdfn); addr = SETFIELD(PHB_CA_REG, addr, offset & ~3u); addr = SETFIELD(PHB_CA_PE, addr, pe); if (use_asb) { /* We don't support ASB config space writes */ return OPAL_UNSUPPORTED; } else { out_be64(p->regs + PHB_CONFIG_ADDRESS, addr); switch(size) { case 1: out_8(p->regs + PHB_CONFIG_DATA + (offset & 3), data); break; case 2: out_le16(p->regs + PHB_CONFIG_DATA + (offset & 2), data); break; case 4: out_le32(p->regs + PHB_CONFIG_DATA, data); break; default: return OPAL_PARAMETER; } } PHBLOGCFG(p, "CFG%d Wr %02x=%08x\n", 8 * size, offset, data); return OPAL_SUCCESS; } #define PHB4_PCI_CFG_WRITE(size, type) \ static int64_t phb4_pcicfg_write##size(struct phb *phb, uint32_t bdfn, \ uint32_t offset, type data) \ { \ struct phb4 *p = phb_to_phb4(phb); \ \ return phb4_pcicfg_write(p, bdfn, offset, sizeof(type), data); \ } PHB4_PCI_CFG_READ(8, u8) PHB4_PCI_CFG_READ(16, u16) PHB4_PCI_CFG_READ(32, u32) PHB4_PCI_CFG_WRITE(8, u8) PHB4_PCI_CFG_WRITE(16, u16) PHB4_PCI_CFG_WRITE(32, u32) static uint8_t phb4_choose_bus(struct phb *phb __unused, struct pci_device *bridge __unused, uint8_t candidate, uint8_t *max_bus __unused, bool *use_max) { /* Use standard bus number selection */ *use_max = false; return candidate; } static int64_t phb4_get_reserved_pe_number(struct phb *phb) { struct phb4 *p = phb_to_phb4(phb); return PHB4_RESERVED_PE_NUM(p); } static void phb4_root_port_init(struct phb *phb __unused, struct pci_device *dev __unused, int ecap __unused, int aercap __unused) { #if 0 uint16_t bdfn = dev->bdfn; uint16_t val16; uint32_t val32; // FIXME: check recommended init values for phb4 /* Enable SERR and parity checking */ pci_cfg_read16(phb, bdfn, PCI_CFG_CMD, &val16); val16 |= (PCI_CFG_CMD_SERR_EN | PCI_CFG_CMD_PERR_RESP); pci_cfg_write16(phb, bdfn, PCI_CFG_CMD, val16); /* Enable reporting various errors */ if (!ecap) return; pci_cfg_read16(phb, bdfn, ecap + PCICAP_EXP_DEVCTL, &val16); val16 |= (PCICAP_EXP_DEVCTL_CE_REPORT | PCICAP_EXP_DEVCTL_NFE_REPORT | PCICAP_EXP_DEVCTL_FE_REPORT | PCICAP_EXP_DEVCTL_UR_REPORT); pci_cfg_write16(phb, bdfn, ecap + PCICAP_EXP_DEVCTL, val16); if (!aercap) return; /* Mask various unrecoverable errors */ pci_cfg_read32(phb, bdfn, aercap + PCIECAP_AER_UE_MASK, &val32); val32 |= (PCIECAP_AER_UE_MASK_POISON_TLP | PCIECAP_AER_UE_MASK_COMPL_TIMEOUT | PCIECAP_AER_UE_MASK_COMPL_ABORT | PCIECAP_AER_UE_MASK_ECRC); pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_UE_MASK, val32); /* Report various unrecoverable errors as fatal errors */ pci_cfg_read32(phb, bdfn, aercap + PCIECAP_AER_UE_SEVERITY, &val32); val32 |= (PCIECAP_AER_UE_SEVERITY_DLLP | PCIECAP_AER_UE_SEVERITY_SURPRISE_DOWN | PCIECAP_AER_UE_SEVERITY_FLOW_CTL_PROT | PCIECAP_AER_UE_SEVERITY_UNEXP_COMPL | PCIECAP_AER_UE_SEVERITY_RECV_OVFLOW | PCIECAP_AER_UE_SEVERITY_MALFORMED_TLP); pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_UE_SEVERITY, val32); /* Mask various recoverable errors */ pci_cfg_read32(phb, bdfn, aercap + PCIECAP_AER_CE_MASK, &val32); val32 |= PCIECAP_AER_CE_MASK_ADV_NONFATAL; pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_CE_MASK, val32); /* Enable ECRC check */ pci_cfg_read32(phb, bdfn, aercap + PCIECAP_AER_CAPCTL, &val32); val32 |= (PCIECAP_AER_CAPCTL_ECRCG_EN | PCIECAP_AER_CAPCTL_ECRCC_EN); pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_CAPCTL, val32); /* Enable all error reporting */ pci_cfg_read32(phb, bdfn, aercap + PCIECAP_AER_RERR_CMD, &val32); val32 |= (PCIECAP_AER_RERR_CMD_FE | PCIECAP_AER_RERR_CMD_NFE | PCIECAP_AER_RERR_CMD_CE); pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_RERR_CMD, val32); #endif } static void phb4_switch_port_init(struct phb *phb, struct pci_device *dev, int ecap, int aercap) { uint16_t bdfn = dev->bdfn; uint16_t val16; uint32_t val32; // FIXME: update AER settings for phb4 /* Enable SERR and parity checking and disable INTx */ pci_cfg_read16(phb, bdfn, PCI_CFG_CMD, &val16); val16 |= (PCI_CFG_CMD_PERR_RESP | PCI_CFG_CMD_SERR_EN | PCI_CFG_CMD_INTx_DIS); pci_cfg_write16(phb, bdfn, PCI_CFG_CMD, val16); /* Disable partity error and enable system error */ pci_cfg_read16(phb, bdfn, PCI_CFG_BRCTL, &val16); val16 &= ~PCI_CFG_BRCTL_PERR_RESP_EN; val16 |= PCI_CFG_BRCTL_SERR_EN; pci_cfg_write16(phb, bdfn, PCI_CFG_BRCTL, val16); /* Enable reporting various errors */ if (!ecap) return; pci_cfg_read16(phb, bdfn, ecap + PCICAP_EXP_DEVCTL, &val16); val16 |= (PCICAP_EXP_DEVCTL_CE_REPORT | PCICAP_EXP_DEVCTL_NFE_REPORT | PCICAP_EXP_DEVCTL_FE_REPORT); /* HW279570 - Disable reporting of correctable errors */ val16 &= ~PCICAP_EXP_DEVCTL_CE_REPORT; pci_cfg_write16(phb, bdfn, ecap + PCICAP_EXP_DEVCTL, val16); /* Unmask all unrecoverable errors */ if (!aercap) return; pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_UE_MASK, 0x0); /* Severity of unrecoverable errors */ if (dev->dev_type == PCIE_TYPE_SWITCH_UPPORT) val32 = (PCIECAP_AER_UE_SEVERITY_DLLP | PCIECAP_AER_UE_SEVERITY_SURPRISE_DOWN | PCIECAP_AER_UE_SEVERITY_FLOW_CTL_PROT | PCIECAP_AER_UE_SEVERITY_RECV_OVFLOW | PCIECAP_AER_UE_SEVERITY_MALFORMED_TLP | PCIECAP_AER_UE_SEVERITY_INTERNAL); else val32 = (PCIECAP_AER_UE_SEVERITY_FLOW_CTL_PROT | PCIECAP_AER_UE_SEVERITY_INTERNAL); pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_UE_SEVERITY, val32); /* * Mask various correctable errors */ val32 = PCIECAP_AER_CE_MASK_ADV_NONFATAL; pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_CE_MASK, val32); /* Enable ECRC generation and disable ECRC check */ pci_cfg_read32(phb, bdfn, aercap + PCIECAP_AER_CAPCTL, &val32); val32 |= PCIECAP_AER_CAPCTL_ECRCG_EN; val32 &= ~PCIECAP_AER_CAPCTL_ECRCC_EN; pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_CAPCTL, val32); } static void phb4_endpoint_init(struct phb *phb, struct pci_device *dev, int ecap, int aercap) { uint16_t bdfn = dev->bdfn; uint16_t val16; uint32_t val32; /* Enable SERR and parity checking */ pci_cfg_read16(phb, bdfn, PCI_CFG_CMD, &val16); val16 |= (PCI_CFG_CMD_PERR_RESP | PCI_CFG_CMD_SERR_EN); pci_cfg_write16(phb, bdfn, PCI_CFG_CMD, val16); /* Enable reporting various errors */ if (!ecap) return; pci_cfg_read16(phb, bdfn, ecap + PCICAP_EXP_DEVCTL, &val16); val16 &= ~PCICAP_EXP_DEVCTL_CE_REPORT; val16 |= (PCICAP_EXP_DEVCTL_NFE_REPORT | PCICAP_EXP_DEVCTL_FE_REPORT | PCICAP_EXP_DEVCTL_UR_REPORT); /* Enable ECRC generation and check */ pci_cfg_read32(phb, bdfn, aercap + PCIECAP_AER_CAPCTL, &val32); val32 |= (PCIECAP_AER_CAPCTL_ECRCG_EN | PCIECAP_AER_CAPCTL_ECRCC_EN); pci_cfg_write32(phb, bdfn, aercap + PCIECAP_AER_CAPCTL, val32); } static int64_t phb4_pcicfg_no_dstate(void *dev, struct pci_cfg_reg_filter *pcrf, uint32_t offset, uint32_t len, uint32_t *data, bool write) { uint32_t loff = offset - pcrf->start; /* Disable D-state change on children of the PHB. For now we * simply block all writes to the PM control/status */ if (write && loff >= 4 && loff < 6) return OPAL_SUCCESS; return OPAL_PARTIAL; } static void phb4_check_device_quirks(struct phb *phb, struct pci_device *dev) { /* Some special adapter tweaks for devices directly under the PHB */ if (dev->primary_bus != 1) return; /* PM quirk */ if (!pci_has_cap(dev, PCI_CFG_CAP_ID_PM, false)) return; pci_add_cfg_reg_filter(dev, pci_cap(dev, PCI_CFG_CAP_ID_PM, false), 8, PCI_REG_FLAG_WRITE, phb4_pcicfg_no_dstate); } static int phb4_device_init(struct phb *phb, struct pci_device *dev, void *data __unused) { int ecap, aercap; /* Setup special device quirks */ phb4_check_device_quirks(phb, dev); /* Common initialization for the device */ pci_device_init(phb, dev); ecap = pci_cap(dev, PCI_CFG_CAP_ID_EXP, false); aercap = pci_cap(dev, PCIECAP_ID_AER, true); if (dev->dev_type == PCIE_TYPE_ROOT_PORT) phb4_root_port_init(phb, dev, ecap, aercap); else if (dev->dev_type == PCIE_TYPE_SWITCH_UPPORT || dev->dev_type == PCIE_TYPE_SWITCH_DNPORT) phb4_switch_port_init(phb, dev, ecap, aercap); else phb4_endpoint_init(phb, dev, ecap, aercap); return 0; } static int64_t phb4_pci_reinit(struct phb *phb, uint64_t scope, uint64_t data) { struct pci_device *pd; uint16_t bdfn = data; int ret; if (scope != OPAL_REINIT_PCI_DEV) return OPAL_PARAMETER; pd = pci_find_dev(phb, bdfn); if (!pd) return OPAL_PARAMETER; ret = phb4_device_init(phb, pd, NULL); if (ret) return OPAL_HARDWARE; return OPAL_SUCCESS; } /* Clear IODA cache tables */ static void phb4_init_ioda_cache(struct phb4 *p) { uint32_t i; uint64_t mbt0; /* * RTT and PELTV. RTE should be 0xFF's to indicate * invalid PE# for the corresponding RID. * * Note: Instead we set all RTE entries to 0x00 to * work around a problem where PE lookups might be * done before Linux has established valid PE's * (during PCI probing). We can revisit that once/if * Linux has been fixed to always setup valid PEs. * * The value 0x00 corresponds to the default PE# Linux * uses to check for config space freezes before it * has assigned PE# to busses. * * WARNING: Additionally, we need to be careful, there's * a HW issue, if we get an MSI on an RTT entry that is * FF, things will go bad. We need to ensure we don't * ever let a live FF RTT even temporarily when resetting * for EEH etc... (HW278969). */ for (i = 0; i < ARRAY_SIZE(p->rte_cache); i++) p->rte_cache[i] = PHB4_RESERVED_PE_NUM(p); memset(p->peltv_cache, 0x0, sizeof(p->peltv_cache)); memset(p->tve_cache, 0x0, sizeof(p->tve_cache)); /* Since we configure the PHB4 with half the PE's, we need * to give the illusion that we support only 128/256 segments * half the segments. * * To achieve that, we configure *all* the M64 windows to use * column 1 of the MDT, which is itself set so that segment 0 and 1 * map to PE0, 2 and 3 to PE1 etc... * * Column 0, 2 and 3 are left all 0, column 0 will be used for M32 * and configured by the OS. */ mbt0 = SETFIELD(IODA3_MBT0_MODE, 0ull, IODA3_MBT0_MODE_MDT); mbt0 = SETFIELD(IODA3_MBT0_MDT_COLUMN, mbt0, 1); for (i = 0; i < p->mbt_size; i++) { p->mbt_cache[i][0] = mbt0; p->mbt_cache[i][1] = 0; } for (i = 0; i < p->max_num_pes; i++) p->mdt_cache[i] = SETFIELD(IODA3_MDT_PE_B, 0ull, i >> 1); /* XXX Should we mask them ? */ memset(p->mist_cache, 0x0, sizeof(p->mist_cache)); /* Initialise M32 bar using MDT entry 0 */ p->mbt_cache[0][0] = IODA3_MBT0_TYPE_M32 | SETFIELD(IODA3_MBT0_MODE, 0ull, IODA3_MBT0_MODE_MDT) | SETFIELD(IODA3_MBT0_MDT_COLUMN, 0ull, 0) | (p->mm1_base & IODA3_MBT0_BASE_ADDR); p->mbt_cache[0][1] = IODA3_MBT1_ENABLE | ((~(M32_PCI_SIZE - 1)) & IODA3_MBT1_MASK); } static int64_t phb4_wait_bit(struct phb4 *p, uint32_t reg, uint64_t mask, uint64_t want_val) { uint64_t val; /* Wait for all pending TCE kills to complete * * XXX Add timeout... */ /* XXX SIMICS is nasty... */ if ((reg == PHB_TCE_KILL || reg == PHB_DMARD_SYNC) && chip_quirk(QUIRK_SIMICS)) return OPAL_SUCCESS; for (;;) { val = in_be64(p->regs + reg); if (val == 0xffffffffffffffffull) { /* XXX Fenced ? */ return OPAL_HARDWARE; } if ((val & mask) == want_val) break; } return OPAL_SUCCESS; } static int64_t phb4_tce_kill(struct phb *phb, uint32_t kill_type, uint64_t pe_number, uint32_t tce_size, uint64_t dma_addr, uint32_t npages) { struct phb4 *p = phb_to_phb4(phb); uint64_t val; int64_t rc; sync(); switch(kill_type) { case OPAL_PCI_TCE_KILL_PAGES: while (npages--) { /* Wait for a slot in the HW kill queue */ rc = phb4_wait_bit(p, PHB_TCE_KILL, PHB_TCE_KILL_ALL | PHB_TCE_KILL_PE | PHB_TCE_KILL_ONE, 0); if (rc) return rc; val = SETFIELD(PHB_TCE_KILL_PENUM, dma_addr, pe_number); /* Set appropriate page size */ switch(tce_size) { case 0x1000: if (dma_addr & 0xf000000000000fffull) return OPAL_PARAMETER; break; case 0x10000: if (dma_addr & 0xf00000000000ffffull) return OPAL_PARAMETER; val |= PHB_TCE_KILL_PSEL | PHB_TCE_KILL_64K; break; case 0x200000: if (dma_addr & 0xf0000000001fffffull) return OPAL_PARAMETER; val |= PHB_TCE_KILL_PSEL | PHB_TCE_KILL_2M; break; case 0x40000000: if (dma_addr & 0xf00000003fffffffull) return OPAL_PARAMETER; val |= PHB_TCE_KILL_PSEL | PHB_TCE_KILL_1G; break; default: return OPAL_PARAMETER; } /* Perform kill */ out_be64(p->regs + PHB_TCE_KILL, PHB_TCE_KILL_ONE | val); /* Next page */ dma_addr += tce_size; } break; case OPAL_PCI_TCE_KILL_PE: /* Wait for a slot in the HW kill queue */ rc = phb4_wait_bit(p, PHB_TCE_KILL, PHB_TCE_KILL_ALL | PHB_TCE_KILL_PE | PHB_TCE_KILL_ONE, 0); if (rc) return rc; /* Perform kill */ out_be64(p->regs + PHB_TCE_KILL, PHB_TCE_KILL_PE | SETFIELD(PHB_TCE_KILL_PENUM, 0ull, pe_number)); break; case OPAL_PCI_TCE_KILL_ALL: /* Wait for a slot in the HW kill queue */ rc = phb4_wait_bit(p, PHB_TCE_KILL, PHB_TCE_KILL_ALL | PHB_TCE_KILL_PE | PHB_TCE_KILL_ONE, 0); if (rc) return rc; /* Perform kill */ out_be64(p->regs + PHB_TCE_KILL, PHB_TCE_KILL_ALL); break; default: return OPAL_PARAMETER; } /* Start DMA sync process */ out_be64(p->regs + PHB_DMARD_SYNC, PHB_DMARD_SYNC_START); /* Wait for kill to complete */ rc = phb4_wait_bit(p, PHB_Q_DMA_R, PHB_Q_DMA_R_TCE_KILL_STATUS, 0); if (rc) return rc; /* Wait for DMA sync to complete */ return phb4_wait_bit(p, PHB_DMARD_SYNC, PHB_DMARD_SYNC_COMPLETE, PHB_DMARD_SYNC_COMPLETE); } /* phb4_ioda_reset - Reset the IODA tables * * @purge: If true, the cache is cleared and the cleared values * are applied to HW. If false, the cached values are * applied to HW * * This reset the IODA tables in the PHB. It is called at * initialization time, on PHB reset, and can be called * explicitly from OPAL */ static int64_t phb4_ioda_reset(struct phb *phb, bool purge) { struct phb4 *p = phb_to_phb4(phb); uint32_t i; uint64_t val; if (purge) { PHBDBG(p, "Purging all IODA tables...\n"); phb4_init_ioda_cache(p); } /* Init_29..30 - Errata workaround, clear PEST */ /* ... We do that further down as part of our normal IODA reset */ /* Init_31..32 - MIST */ phb4_ioda_sel(p, IODA3_TBL_MIST, 0, true); val = in_be64(p->regs + PHB_IODA_ADDR); val = SETFIELD(PHB_IODA_AD_MIST_PWV, val, 0xf); out_be64(p->regs + PHB_IODA_ADDR, val); for (i = 0; i < (p->num_irqs/4); i++) out_be64(p->regs + PHB_IODA_DATA0, p->mist_cache[i]); /* Init_33..34 - MRT */ phb4_ioda_sel(p, IODA3_TBL_MRT, 0, true); for (i = 0; i < p->mrt_size; i++) out_be64(p->regs + PHB_IODA_DATA0, 0); /* Init_35..36 - TVT */ phb4_ioda_sel(p, IODA3_TBL_TVT, 0, true); for (i = 0; i < p->tvt_size; i++) out_be64(p->regs + PHB_IODA_DATA0, p->tve_cache[i]); /* Init_37..38 - MBT */ phb4_ioda_sel(p, IODA3_TBL_MBT, 0, true); for (i = 0; i < p->mbt_size; i++) { out_be64(p->regs + PHB_IODA_DATA0, p->mbt_cache[i][0]); out_be64(p->regs + PHB_IODA_DATA0, p->mbt_cache[i][1]); } /* Init_39..40 - MDT */ phb4_ioda_sel(p, IODA3_TBL_MDT, 0, true); for (i = 0; i < p->max_num_pes; i++) out_be64(p->regs + PHB_IODA_DATA0, p->mdt_cache[i]); /* Clear RTT and PELTV */ if (p->tbl_rtt) memcpy((void *)p->tbl_rtt, p->rte_cache, RTT_TABLE_SIZE); if (p->tbl_peltv) memcpy((void *)p->tbl_peltv, p->peltv_cache, p->tbl_peltv_size); /* Clear PEST & PEEV */ for (i = 0; i < p->max_num_pes; i++) { phb4_ioda_sel(p, IODA3_TBL_PESTA, i, false); out_be64(p->regs + PHB_IODA_DATA0, 0); phb4_ioda_sel(p, IODA3_TBL_PESTB, i, false); out_be64(p->regs + PHB_IODA_DATA0, 0); } phb4_ioda_sel(p, IODA3_TBL_PEEV, 0, true); for (i = 0; i < p->max_num_pes/64; i++) out_be64(p->regs + PHB_IODA_DATA0, 0); /* Invalidate RTE, TCE cache */ out_be64(p->regs + PHB_RTC_INVALIDATE, PHB_RTC_INVALIDATE_ALL); return phb4_tce_kill(&p->phb, OPAL_PCI_TCE_KILL_ALL, 0, 0, 0, 0); } /* * Clear anything we have in PAPR Error Injection registers. Though * the spec says the PAPR error injection should be one-shot without * the "sticky" bit. However, that's false according to the experiments * I had. So we have to clear it at appropriate point in kernel to * avoid endless frozen PE. */ static int64_t phb4_papr_errinjct_reset(struct phb *phb) { struct phb4 *p = phb_to_phb4(phb); out_be64(p->regs + PHB_PAPR_ERR_INJ_CTL, 0x0ul); out_be64(p->regs + PHB_PAPR_ERR_INJ_ADDR, 0x0ul); out_be64(p->regs + PHB_PAPR_ERR_INJ_MASK, 0x0ul); return OPAL_SUCCESS; } static int64_t phb4_set_phb_mem_window(struct phb *phb, uint16_t window_type, uint16_t window_num, uint64_t addr, uint64_t pci_addr, uint64_t size) { struct phb4 *p = phb_to_phb4(phb); uint64_t mbt0, mbt1; /* * We have a unified MBT for all BARs on PHB4. However we * also have a current limitation that only half of the PEs * are available (in order to have 2 TVT entries per PE). * * So we use it as follow: * * - M32 is hard wired to be MBT[0] and uses MDT column 0 * for remapping. * * - MBT[1..n] are available to the OS, currently only as * fully segmented or single PE (we don't yet expose the * new segmentation modes). * * - In order to deal with the above PE# limitations, since * the OS assumes the segmentation is done with as many * segments as PEs, we effectively fake it by mapping all * MBT[1..n] to NDT column 1 which has been configured to * give 2 adjacent segments the same PE# (see comment in * ioda cache init). We don't expose the other columns to * the OS. */ switch (window_type) { case OPAL_IO_WINDOW_TYPE: case OPAL_M32_WINDOW_TYPE: return OPAL_UNSUPPORTED; case OPAL_M64_WINDOW_TYPE: if (window_num == 0 || window_num >= p->mbt_size) { PHBERR(p, "%s: Invalid window %d\n", __func__, window_num); return OPAL_PARAMETER; } mbt0 = p->mbt_cache[window_num][0]; mbt1 = p->mbt_cache[window_num][1]; /* XXX For now we assume the 4K minimum alignment, * todo: check with the HW folks what the exact limits * are based on the segmentation model. */ if ((addr & 0xFFFul) || (size & 0xFFFul)) { PHBERR(p, "%s: Bad addr/size alignment %llx/%llx\n", __func__, addr, size); return OPAL_PARAMETER; } /* size should be 2^N */ if (!size || size & (size-1)) { PHBERR(p, "%s: size not a power of 2: %llx\n", __func__, size); return OPAL_PARAMETER; } /* address should be size aligned */ if (addr & (size - 1)) { PHBERR(p, "%s: addr not size aligned %llx/%llx\n", __func__, addr, size); return OPAL_PARAMETER; } break; default: return OPAL_PARAMETER; } /* The BAR shouldn't be enabled yet */ if (mbt0 & IODA3_MBT0_ENABLE) return OPAL_PARTIAL; /* Apply the settings */ mbt0 = SETFIELD(IODA3_MBT0_BASE_ADDR, mbt0, addr >> 12); mbt1 = SETFIELD(IODA3_MBT1_MASK, mbt1, ~((size >> 12) -1)); p->mbt_cache[window_num][0] = mbt0; p->mbt_cache[window_num][1] = mbt1; return OPAL_SUCCESS; } /* * For one specific M64 BAR, it can be shared by all PEs, * or owned by single PE exclusively. */ static int64_t phb4_phb_mmio_enable(struct phb __unused *phb, uint16_t window_type, uint16_t window_num, uint16_t enable) { struct phb4 *p = phb_to_phb4(phb); uint64_t mbt0, mbt1, base, mask; /* * By design, PHB4 doesn't support IODT any more. * Besides, we can't enable M32 BAR as well. So * the function is used to do M64 mapping and each * BAR is supposed to be shared by all PEs. * * TODO: Add support for some of the new PHB4 split modes */ switch (window_type) { case OPAL_IO_WINDOW_TYPE: case OPAL_M32_WINDOW_TYPE: return OPAL_UNSUPPORTED; case OPAL_M64_WINDOW_TYPE: /* Window 0 is reserved for M32 */ if (window_num == 0 || window_num >= p->mbt_size || enable > OPAL_ENABLE_M64_NON_SPLIT) return OPAL_PARAMETER; break; default: return OPAL_PARAMETER; } /* * We need check the base/mask while enabling * the M64 BAR. Otherwise, invalid base/mask * might cause fenced AIB unintentionally */ mbt0 = p->mbt_cache[window_num][0]; mbt1 = p->mbt_cache[window_num][1]; if (enable == OPAL_DISABLE_M64) { /* Reset the window to disabled & MDT mode */ mbt0 = SETFIELD(IODA3_MBT0_MODE, 0ull, IODA3_MBT0_MODE_MDT); mbt1 = 0; } else { /* Verify that the mode is valid and consistent */ if (enable == OPAL_ENABLE_M64_SPLIT) { if (GETFIELD(IODA3_MBT0_MODE, mbt0) != IODA3_MBT0_MODE_MDT) return OPAL_PARAMETER; } else if (enable == OPAL_ENABLE_M64_NON_SPLIT) { if (GETFIELD(IODA3_MBT0_MODE, mbt0) != IODA3_MBT0_MODE_SINGLE_PE) return OPAL_PARAMETER; } else return OPAL_PARAMETER; base = GETFIELD(IODA3_MBT0_BASE_ADDR, mbt0); base = (base << 12); mask = GETFIELD(IODA3_MBT1_MASK, mbt1); if (base < p->mm0_base || !mask) return OPAL_PARTIAL; mbt0 |= IODA3_MBT0_ENABLE; mbt1 |= IODA3_MBT1_ENABLE; } /* Update HW and cache */ p->mbt_cache[window_num][0] = mbt0; p->mbt_cache[window_num][1] = mbt1; phb4_ioda_sel(p, IODA3_TBL_MBT, window_num << 1, true); out_be64(p->regs + PHB_IODA_DATA0, mbt0); out_be64(p->regs + PHB_IODA_DATA0, mbt1); return OPAL_SUCCESS; } static int64_t phb4_map_pe_mmio_window(struct phb *phb, uint64_t pe_number, uint16_t window_type, uint16_t window_num, uint16_t segment_num) { struct phb4 *p = phb_to_phb4(phb); uint64_t mbt0, mbt1, mdt0, mdt1; if (pe_number >= p->num_pes) return OPAL_PARAMETER; /* * We support a combined MDT that has 4 columns. We let the OS * use kernel 0 for now, and we configure column1 ourselves * to handle the "half PEs" problem and thus simulate having * smaller segments. columns 2 and 3 are currently unused. We * might later on find a way to let the OS exploit them. */ switch(window_type) { case OPAL_IO_WINDOW_TYPE: return OPAL_UNSUPPORTED; case OPAL_M32_WINDOW_TYPE: if (window_num != 0 || segment_num >= p->max_num_pes) return OPAL_PARAMETER; mdt0 = p->mdt_cache[segment_num << 1]; mdt1 = p->mdt_cache[(segment_num << 1) + 1]; mdt0 = SETFIELD(IODA3_MDT_PE_A, mdt0, pe_number); mdt1 = SETFIELD(IODA3_MDT_PE_A, mdt1, pe_number); p->mdt_cache[segment_num << 1] = mdt0; p->mdt_cache[(segment_num << 1) + 1] = mdt1; phb4_ioda_sel(p, IODA3_TBL_MDT, segment_num << 1, true); out_be64(p->regs + PHB_IODA_DATA0, mdt0); out_be64(p->regs + PHB_IODA_DATA0, mdt1); break; case OPAL_M64_WINDOW_TYPE: if (window_num == 0 || window_num >= p->mbt_size) return OPAL_PARAMETER; mbt0 = p->mbt_cache[window_num][0]; mbt1 = p->mbt_cache[window_num][1]; /* The BAR shouldn't be enabled yet */ if (mbt0 & IODA3_MBT0_ENABLE) return OPAL_PARTIAL; /* Set to single PE mode and configure the PE */ mbt0 = SETFIELD(IODA3_MBT0_MODE, mbt0, IODA3_MBT0_MODE_SINGLE_PE); mbt1 = SETFIELD(IODA3_MBT1_SINGLE_PE_NUM, mbt1, pe_number); p->mbt_cache[window_num][0] = mbt0; p->mbt_cache[window_num][1] = mbt1; break; default: return OPAL_PARAMETER; } return OPAL_SUCCESS; } static int64_t phb4_map_pe_dma_window(struct phb *phb, uint64_t pe_number, uint16_t window_id, uint16_t tce_levels, uint64_t tce_table_addr, uint64_t tce_table_size, uint64_t tce_page_size) { struct phb4 *p = phb_to_phb4(phb); uint64_t tts_encoded; uint64_t data64 = 0; /* * We configure the PHB in 2 TVE per PE mode to match phb3. * Current Linux implementation *requires* the two windows per * PE. */ /* * Sanity check. We currently only support "2 window per PE" mode * ie, only bit 59 of the PCI address is used to select the window */ if (pe_number >= p->num_pes || (window_id >> 1) != pe_number) return OPAL_PARAMETER; /* * tce_table_size == 0 is used to disable an entry, in this case * we ignore other arguments */ if (tce_table_size == 0) { phb4_ioda_sel(p, IODA3_TBL_TVT, window_id, false); out_be64(p->regs + PHB_IODA_DATA0, 0); p->tve_cache[window_id] = 0; return OPAL_SUCCESS; } /* Additional arguments validation */ if (tce_levels < 1 || tce_levels > 5 || !is_pow2(tce_table_size) || tce_table_size < 0x1000) return OPAL_PARAMETER; /* Encode TCE table size */ data64 = SETFIELD(IODA3_TVT_TABLE_ADDR, 0ul, tce_table_addr >> 12); tts_encoded = ilog2(tce_table_size) - 11; if (tts_encoded > 31) return OPAL_PARAMETER; data64 = SETFIELD(IODA3_TVT_TCE_TABLE_SIZE, data64, tts_encoded); /* Encode TCE page size */ switch (tce_page_size) { case 0x1000: /* 4K */ data64 = SETFIELD(IODA3_TVT_IO_PSIZE, data64, 1); break; case 0x10000: /* 64K */ data64 = SETFIELD(IODA3_TVT_IO_PSIZE, data64, 5); break; case 0x1000000: /* 16M */ data64 = SETFIELD(IODA3_TVT_IO_PSIZE, data64, 13); break; case 0x10000000: /* 256M */ data64 = SETFIELD(IODA3_TVT_IO_PSIZE, data64, 17); break; default: return OPAL_PARAMETER; } /* Encode number of levels */ data64 = SETFIELD(IODA3_TVT_NUM_LEVELS, data64, tce_levels - 1); phb4_ioda_sel(p, IODA3_TBL_TVT, window_id, false); out_be64(p->regs + PHB_IODA_DATA0, data64); p->tve_cache[window_id] = data64; return OPAL_SUCCESS; } static int64_t phb4_map_pe_dma_window_real(struct phb *phb, uint64_t pe_number, uint16_t window_id, uint64_t pci_start_addr, uint64_t pci_mem_size) { struct phb4 *p = phb_to_phb4(phb); uint64_t end = pci_start_addr + pci_mem_size; uint64_t tve; if (pe_number >= p->num_pes || (window_id >> 1) != pe_number) return OPAL_PARAMETER; if (pci_mem_size) { /* Enable */ /* * Check that the start address has the right TVE index, * we only support the 1 bit mode where each PE has 2 * TVEs */ if ((pci_start_addr >> 59) != (window_id & 1)) return OPAL_PARAMETER; pci_start_addr &= ((1ull << 59) - 1); end = pci_start_addr + pci_mem_size; /* We have to be 16M aligned */ if ((pci_start_addr & 0x00ffffff) || (pci_mem_size & 0x00ffffff)) return OPAL_PARAMETER; /* * It *looks* like this is the max we can support (we need * to verify this. Also we are not checking for rollover, * but then we aren't trying too hard to protect ourselves * againt a completely broken OS. */ if (end > 0x0003ffffffffffffull) return OPAL_PARAMETER; /* * Put start address bits 49:24 into TVE[52:53]||[0:23] * and end address bits 49:24 into TVE[54:55]||[24:47] * and set TVE[51] */ tve = (pci_start_addr << 16) & (0xffffffull << 40); tve |= (pci_start_addr >> 38) & (3ull << 10); tve |= (end >> 8) & (0xfffffful << 16); tve |= (end >> 40) & (3ull << 8); tve |= PPC_BIT(51) | IODA3_TVT_NON_TRANSLATE_50; } else { /* Disable */ tve = 0; } phb4_ioda_sel(p, IODA3_TBL_TVT, window_id, false); out_be64(p->regs + PHB_IODA_DATA0, tve); p->tve_cache[window_id] = tve; return OPAL_SUCCESS; } static int64_t phb4_set_ive_pe(struct phb *phb, uint64_t pe_number, uint32_t ive_num) { struct phb4 *p = phb_to_phb4(phb); uint32_t mist_idx; uint32_t mist_quad; uint32_t mist_shift; uint64_t val; if (pe_number >= p->num_pes || ive_num >= (p->num_irqs - 8)) return OPAL_PARAMETER; mist_idx = ive_num >> 2; mist_quad = ive_num & 3; mist_shift = (3 - mist_quad) << 4; p->mist_cache[mist_idx] &= ~(0x0fffull << mist_shift); p->mist_cache[mist_idx] |= ((uint64_t)pe_number) << mist_shift; /* Note: This has the side effect of clearing P/Q, so this * shouldn't be called while the interrupt is "hot" */ phb4_ioda_sel(p, IODA3_TBL_MIST, mist_idx, false); /* We need to inject the appropriate MIST write enable bit * in the IODA table address register */ val = in_be64(p->regs + PHB_IODA_ADDR); val = SETFIELD(PHB_IODA_AD_MIST_PWV, val, 8 >> mist_quad); out_be64(p->regs + PHB_IODA_ADDR, val); /* Write entry */ out_be64(p->regs + PHB_IODA_DATA0, p->mist_cache[mist_idx]); return OPAL_SUCCESS; } static int64_t phb4_get_msi_32(struct phb *phb, uint64_t pe_number, uint32_t ive_num, uint8_t msi_range, uint32_t *msi_address, uint32_t *message_data) { struct phb4 *p = phb_to_phb4(phb); /* * Sanity check. We needn't check on mve_number (PE#) * on PHB3 since the interrupt source is purely determined * by its DMA address and data, but the check isn't * harmful. */ if (pe_number >= p->num_pes || ive_num >= (p->num_irqs - 8) || msi_range != 1 || !msi_address|| !message_data) return OPAL_PARAMETER; /* * DMA address and data will form the IVE index. * For more details, please refer to IODA2 spec. */ *msi_address = 0xFFFF0000 | ((ive_num << 4) & 0xFFFFFE0F); *message_data = ive_num & 0x1F; return OPAL_SUCCESS; } static int64_t phb4_get_msi_64(struct phb *phb, uint64_t pe_number, uint32_t ive_num, uint8_t msi_range, uint64_t *msi_address, uint32_t *message_data) { struct phb4 *p = phb_to_phb4(phb); /* Sanity check */ if (pe_number >= p->num_pes || ive_num >= (p->num_irqs - 8) || msi_range != 1 || !msi_address || !message_data) return OPAL_PARAMETER; /* * DMA address and data will form the IVE index. * For more details, please refer to IODA2 spec. */ *msi_address = (0x1ul << 60) | ((ive_num << 4) & 0xFFFFFFFFFFFFFE0Ful); *message_data = ive_num & 0x1F; return OPAL_SUCCESS; } /* * The function can be called during error recovery for INF * and ER class. For INF case, it's expected to be called * when grabbing the error log. We will call it explicitly * when clearing frozen PE state for ER case. */ static void phb4_err_ER_clear(struct phb4 *p) { #if 0 uint32_t val32; uint64_t val64; uint64_t fir = in_be64(p->regs + PHB_LEM_FIR_ACCUM); /* Rec 1: Grab the PCI config lock */ /* Removed... unnecessary. We have our own lock here */ /* Rec 2/3/4: Take all inbound transactions */ out_be64(p->regs + PHB_CONFIG_ADDRESS, 0x8000001c00000000ul); out_be32(p->regs + PHB_CONFIG_DATA, 0x10000000); /* Rec 5/6/7: Clear pending non-fatal errors */ out_be64(p->regs + PHB_CONFIG_ADDRESS, 0x8000005000000000ul); val32 = in_be32(p->regs + PHB_CONFIG_DATA); out_be32(p->regs + PHB_CONFIG_DATA, (val32 & 0xe0700000) | 0x0f000f00); /* Rec 8/9/10: Clear pending fatal errors for AER */ out_be64(p->regs + PHB_CONFIG_ADDRESS, 0x8000010400000000ul); out_be32(p->regs + PHB_CONFIG_DATA, 0xffffffff); /* Rec 11/12/13: Clear pending non-fatal errors for AER */ out_be64(p->regs + PHB_CONFIG_ADDRESS, 0x8000011000000000ul); out_be32(p->regs + PHB_CONFIG_DATA, 0xffffffff); /* Rec 22/23/24: Clear root port errors */ out_be64(p->regs + PHB_CONFIG_ADDRESS, 0x8000013000000000ul); out_be32(p->regs + PHB_CONFIG_DATA, 0xffffffff); /* Rec 25/26/27: Enable IO and MMIO bar */ out_be64(p->regs + PHB_CONFIG_ADDRESS, 0x8000004000000000ul); out_be32(p->regs + PHB_CONFIG_DATA, 0x470100f8); /* Rec 28: Release the PCI config lock */ /* Removed... unnecessary. We have our own lock here */ /* Rec 29...34: Clear UTL errors */ val64 = in_be64(p->regs + UTL_SYS_BUS_AGENT_STATUS); out_be64(p->regs + UTL_SYS_BUS_AGENT_STATUS, val64); val64 = in_be64(p->regs + UTL_PCIE_PORT_STATUS); out_be64(p->regs + UTL_PCIE_PORT_STATUS, val64); val64 = in_be64(p->regs + UTL_RC_STATUS); out_be64(p->regs + UTL_RC_STATUS, val64); /* Rec 39...66: Clear PHB error trap */ val64 = in_be64(p->regs + PHB_ERR_STATUS); out_be64(p->regs + PHB_ERR_STATUS, val64); out_be64(p->regs + PHB_ERR1_STATUS, 0x0ul); out_be64(p->regs + PHB_ERR_LOG_0, 0x0ul); out_be64(p->regs + PHB_ERR_LOG_1, 0x0ul); val64 = in_be64(p->regs + PHB_OUT_ERR_STATUS); out_be64(p->regs + PHB_OUT_ERR_STATUS, val64); out_be64(p->regs + PHB_OUT_ERR1_STATUS, 0x0ul); out_be64(p->regs + PHB_OUT_ERR_LOG_0, 0x0ul); out_be64(p->regs + PHB_OUT_ERR_LOG_1, 0x0ul); val64 = in_be64(p->regs + PHB_INA_ERR_STATUS); out_be64(p->regs + PHB_INA_ERR_STATUS, val64); out_be64(p->regs + PHB_INA_ERR1_STATUS, 0x0ul); out_be64(p->regs + PHB_INA_ERR_LOG_0, 0x0ul); out_be64(p->regs + PHB_INA_ERR_LOG_1, 0x0ul); val64 = in_be64(p->regs + PHB_INB_ERR_STATUS); out_be64(p->regs + PHB_INB_ERR_STATUS, val64); out_be64(p->regs + PHB_INB_ERR1_STATUS, 0x0ul); out_be64(p->regs + PHB_INB_ERR_LOG_0, 0x0ul); out_be64(p->regs + PHB_INB_ERR_LOG_1, 0x0ul); /* Rec 67/68: Clear FIR/WOF */ out_be64(p->regs + PHB_LEM_FIR_AND_MASK, ~fir); out_be64(p->regs + PHB_LEM_WOF, 0x0ul); #endif } static void phb4_read_phb_status(struct phb4 *p, struct OpalIoPhb4ErrorData *stat) { uint16_t val = 0; uint32_t i; uint64_t val64 = 0; uint64_t *pPEST; memset(stat, 0, sizeof(struct OpalIoPhb4ErrorData)); /* Error data common part */ stat->common.version = OPAL_PHB_ERROR_DATA_VERSION_1; stat->common.ioType = OPAL_PHB_ERROR_DATA_TYPE_PHB4; stat->common.len = sizeof(struct OpalIoPhb4ErrorData); /* * TODO: investigate reading registers through ASB instead of AIB. * * Until this is implemented, some registers may be unreadable through * a fence. */ /* Grab RC bridge control, make it 32-bit */ phb4_pcicfg_read16(&p->phb, 0, PCI_CFG_BRCTL, &val); stat->brdgCtl = val; /* XXX: No UTL registers on PHB4? */ /* * Grab various RC PCIe capability registers. All device, slot * and link status are 16-bit, so we grab the pair control+status * for each of them */ phb4_pcicfg_read32(&p->phb, 0, p->ecap + PCICAP_EXP_DEVCTL, &stat->deviceStatus); phb4_pcicfg_read32(&p->phb, 0, p->ecap + PCICAP_EXP_SLOTCTL, &stat->slotStatus); phb4_pcicfg_read32(&p->phb, 0, p->ecap + PCICAP_EXP_LCTL, &stat->linkStatus); /* * I assume those are the standard config space header, cmd & status * together makes 32-bit. Secondary status is 16-bit so I'll clear * the top on that one */ phb4_pcicfg_read32(&p->phb, 0, PCI_CFG_CMD, &stat->devCmdStatus); phb4_pcicfg_read16(&p->phb, 0, PCI_CFG_SECONDARY_STATUS, &val); stat->devSecStatus = val; /* Grab a bunch of AER regs */ phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_RERR_STA, &stat->rootErrorStatus); phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_UE_STATUS, &stat->uncorrErrorStatus); phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_CE_STATUS, &stat->corrErrorStatus); phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_HDR_LOG0, &stat->tlpHdr1); phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_HDR_LOG1, &stat->tlpHdr2); phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_HDR_LOG2, &stat->tlpHdr3); phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_HDR_LOG3, &stat->tlpHdr4); phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_SRCID, &stat->sourceId); /* PEC NFIR, same as P8/PHB3 */ xscom_read(p->chip_id, p->pe_stk_xscom + 0x0, &stat->nFir); xscom_read(p->chip_id, p->pe_stk_xscom + 0x3, &stat->nFirMask); xscom_read(p->chip_id, p->pe_stk_xscom + 0x8, &stat->nFirWOF); /* PHB4 inbound and outbound error Regs */ stat->phbPlssr = phb4_read_reg_asb(p, PHB_CPU_LOADSTORE_STATUS); stat->phbCsr = phb4_read_reg_asb(p, PHB_DMA_CHAN_STATUS); stat->lemFir = phb4_read_reg_asb(p, PHB_LEM_FIR_ACCUM); stat->lemErrorMask = phb4_read_reg_asb(p, PHB_LEM_ERROR_MASK); stat->lemWOF = phb4_read_reg_asb(p, PHB_LEM_WOF); stat->phbErrorStatus = phb4_read_reg_asb(p, PHB_ERR_STATUS); stat->phbFirstErrorStatus = phb4_read_reg_asb(p, PHB_ERR1_STATUS); stat->phbErrorLog0 = phb4_read_reg_asb(p, PHB_ERR_LOG_0); stat->phbErrorLog1 = phb4_read_reg_asb(p, PHB_ERR_LOG_1); stat->phbTxeErrorStatus = phb4_read_reg_asb(p, PHB_TXE_ERR_STATUS); stat->phbTxeFirstErrorStatus = phb4_read_reg_asb(p, PHB_TXE_ERR1_STATUS); stat->phbTxeErrorLog0 = phb4_read_reg_asb(p, PHB_TXE_ERR_LOG_0); stat->phbTxeErrorLog1 = phb4_read_reg_asb(p, PHB_TXE_ERR_LOG_1); stat->phbRxeArbErrorStatus = phb4_read_reg_asb(p, PHB_RXE_ARB_ERR_STATUS); stat->phbRxeArbFirstErrorStatus = phb4_read_reg_asb(p, PHB_RXE_ARB_ERR1_STATUS); stat->phbRxeArbErrorLog0 = phb4_read_reg_asb(p, PHB_RXE_ARB_ERR_LOG_0); stat->phbRxeArbErrorLog1 = phb4_read_reg_asb(p, PHB_RXE_ARB_ERR_LOG_1); stat->phbRxeMrgErrorStatus = phb4_read_reg_asb(p, PHB_RXE_MRG_ERR_STATUS); stat->phbRxeMrgFirstErrorStatus = phb4_read_reg_asb(p, PHB_RXE_MRG_ERR1_STATUS); stat->phbRxeMrgErrorLog0 = phb4_read_reg_asb(p, PHB_RXE_MRG_ERR_LOG_0); stat->phbRxeMrgErrorLog1 = phb4_read_reg_asb(p, PHB_RXE_MRG_ERR_LOG_1); stat->phbRxeTceErrorStatus = phb4_read_reg_asb(p, PHB_RXE_TCE_ERR_STATUS); stat->phbRxeTceFirstErrorStatus = phb4_read_reg_asb(p, PHB_RXE_TCE_ERR1_STATUS); stat->phbRxeTceErrorLog0 = phb4_read_reg_asb(p, PHB_RXE_TCE_ERR_LOG_0); stat->phbRxeTceErrorLog1 = phb4_read_reg_asb(p, PHB_RXE_TCE_ERR_LOG_1); /* PHB4 REGB error registers */ stat->phbPblErrorStatus = phb4_read_reg_asb(p, PHB_PBL_ERR_STATUS); stat->phbPblFirstErrorStatus = phb4_read_reg_asb(p, PHB_PBL_ERR1_STATUS); stat->phbPblErrorLog0 = phb4_read_reg_asb(p, PHB_PBL_ERR_LOG_0); stat->phbPblErrorLog1 = phb4_read_reg_asb(p, PHB_PBL_ERR_LOG_0); stat->phbPcieDlpErrorStatus = phb4_read_reg_asb(p, PHB_PCIE_DLP_ERR_STATUS); stat->phbPcieDlpErrorLog1 = phb4_read_reg_asb(p, PHB_PCIE_DLP_ERRLOG1); stat->phbPcieDlpErrorLog2 = phb4_read_reg_asb(p, PHB_PCIE_DLP_ERRLOG2); stat->phbRegbErrorStatus = phb4_read_reg_asb(p, PHB_REGB_ERR_STATUS); stat->phbRegbFirstErrorStatus = phb4_read_reg_asb(p, PHB_REGB_ERR1_STATUS); stat->phbRegbErrorLog0 = phb4_read_reg_asb(p, PHB_REGB_ERR_LOG_0); stat->phbRegbErrorLog1 = phb4_read_reg_asb(p, PHB_REGB_ERR_LOG_1); /* * Grab PESTA & B content. The error bit (bit#0) should * be fetched from IODA and the left content from memory * resident tables. */ pPEST = (uint64_t *)p->tbl_pest; val64 = PHB_IODA_AD_AUTOINC; val64 = SETFIELD(PHB_IODA_AD_TSEL, val64, IODA3_TBL_PESTA); phb4_write_reg_asb(p, PHB_IODA_ADDR, val64); for (i = 0; i < OPAL_PHB4_NUM_PEST_REGS; i++) { stat->pestA[i] = phb4_read_reg_asb(p, PHB_IODA_DATA0); stat->pestA[i] |= pPEST[2 * i]; } val64 = PHB_IODA_AD_AUTOINC; val64 = SETFIELD(PHB_IODA_AD_TSEL, val64, IODA3_TBL_PESTB); phb4_write_reg_asb(p, PHB_IODA_ADDR, val64); for (i = 0; i < OPAL_PHB4_NUM_PEST_REGS; i++) { stat->pestB[i] = phb4_read_reg_asb(p, PHB_IODA_DATA0); stat->pestB[i] |= pPEST[2 * i + 1]; } } static int64_t phb4_set_pe(struct phb *phb, uint64_t pe_number, uint64_t bdfn, uint8_t bcompare, uint8_t dcompare, uint8_t fcompare, uint8_t action) { struct phb4 *p = phb_to_phb4(phb); uint64_t mask, val, tmp, idx; int32_t all = 0; uint16_t *rte; /* Sanity check */ if (!p->tbl_rtt) return OPAL_HARDWARE; if (action != OPAL_MAP_PE && action != OPAL_UNMAP_PE) return OPAL_PARAMETER; if (pe_number >= p->num_pes || bdfn > 0xffff || bcompare > OpalPciBusAll || dcompare > OPAL_COMPARE_RID_DEVICE_NUMBER || fcompare > OPAL_COMPARE_RID_FUNCTION_NUMBER) return OPAL_PARAMETER; /* Figure out the RID range */ if (bcompare == OpalPciBusAny) { mask = 0x0; val = 0x0; all = 0x1; } else { tmp = ((0x1 << (bcompare + 1)) - 1) << (15 - bcompare); mask = tmp; val = bdfn & tmp; } if (dcompare == OPAL_IGNORE_RID_DEVICE_NUMBER) all = (all << 1) | 0x1; else { mask |= 0xf8; val |= (bdfn & 0xf8); } if (fcompare == OPAL_IGNORE_RID_FUNCTION_NUMBER) all = (all << 1) | 0x1; else { mask |= 0x7; val |= (bdfn & 0x7); } /* Map or unmap the RTT range */ if (all == 0x7) { if (action == OPAL_MAP_PE) { for (idx = 0; idx < RTT_TABLE_ENTRIES; idx++) p->rte_cache[idx] = pe_number; } else { for ( idx = 0; idx < ARRAY_SIZE(p->rte_cache); idx++) p->rte_cache[idx] = PHB4_RESERVED_PE_NUM(p); } memcpy((void *)p->tbl_rtt, p->rte_cache, RTT_TABLE_SIZE); } else { rte = (uint16_t *)p->tbl_rtt; for (idx = 0; idx < RTT_TABLE_ENTRIES; idx++, rte++) { if ((idx & mask) != val) continue; if (action == OPAL_MAP_PE) p->rte_cache[idx] = pe_number; else p->rte_cache[idx] = PHB4_RESERVED_PE_NUM(p); *rte = p->rte_cache[idx]; } } /* Invalidate the entire RTC */ out_be64(p->regs + PHB_RTC_INVALIDATE, PHB_RTC_INVALIDATE_ALL); return OPAL_SUCCESS; } static int64_t phb4_set_peltv(struct phb *phb, uint32_t parent_pe, uint32_t child_pe, uint8_t state) { struct phb4 *p = phb_to_phb4(phb); uint8_t *peltv; uint32_t idx, mask; /* Sanity check */ if (!p->tbl_peltv) return OPAL_HARDWARE; if (parent_pe >= p->num_pes || child_pe >= p->num_pes) return OPAL_PARAMETER; /* Find index for parent PE */ idx = parent_pe * (p->max_num_pes / 8); idx += (child_pe / 8); mask = 0x1 << (7 - (child_pe % 8)); peltv = (uint8_t *)p->tbl_peltv; peltv += idx; if (state) { *peltv |= mask; p->peltv_cache[idx] |= mask; } else { *peltv &= ~mask; p->peltv_cache[idx] &= ~mask; } return OPAL_SUCCESS; } static void phb4_prepare_link_change(struct pci_slot *slot, bool is_up) { struct phb4 *p = phb_to_phb4(slot->phb); uint32_t reg32; p->has_link = is_up; if (is_up) { /* Clear AER receiver error status */ phb4_pcicfg_write32(&p->phb, 0, p->aercap + PCIECAP_AER_CE_STATUS, PCIECAP_AER_CE_RECVR_ERR); /* Unmask receiver error status in AER */ phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_CE_MASK, ®32); reg32 &= ~PCIECAP_AER_CE_RECVR_ERR; phb4_pcicfg_write32(&p->phb, 0, p->aercap + PCIECAP_AER_CE_MASK, reg32); /* Don't block PCI-CFG */ p->flags &= ~PHB4_CFG_BLOCKED; /* * We might lose the bus numbers during the reset operation * and we need to restore them. Otherwise, some adapters (e.g. * IPR) can't be probed properly by the kernel. We don't need * to restore bus numbers for every kind of reset, however, * it's not harmful to always restore the bus numbers, which * simplifies the logic. */ pci_restore_bridge_buses(slot->phb, slot->pd); if (slot->phb->ops->device_init) pci_walk_dev(slot->phb, slot->pd, slot->phb->ops->device_init, NULL); } else { /* Mask AER receiver error */ phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_CE_MASK, ®32); reg32 |= PCIECAP_AER_CE_RECVR_ERR; phb4_pcicfg_write32(&p->phb, 0, p->aercap + PCIECAP_AER_CE_MASK, reg32); /* Block PCI-CFG access */ p->flags |= PHB4_CFG_BLOCKED; } } static int64_t phb4_get_presence_state(struct pci_slot *slot, uint8_t *val) { struct phb4 *p = phb_to_phb4(slot->phb); uint64_t hps, dtctl; /* Test for PHB in error state ? */ if (p->state == PHB4_STATE_BROKEN) return OPAL_HARDWARE; /* Read hotplug status */ hps = in_be64(p->regs + PHB_PCIE_HOTPLUG_STATUS); /* Read link status */ dtctl = in_be64(p->regs + PHB_PCIE_DLP_TRAIN_CTL); PHBDBG(p, "hp_status=0x%016llx, dlp_train_ctl=0x%016llx\n", hps, dtctl); *val = OPAL_PCI_SLOT_PRESENT; /* Check presence detect */ if (hps & PHB_PCIE_HPSTAT_PRESENCE) { /* If it says not present but link is up, then we assume * we are on a broken simulation environment and still * return a valid presence. Otherwise, not present. */ if (dtctl & PHB_PCIE_DLP_TL_LINKACT) { PHBERR(p, "Presence detect 0 but link set !\n"); return OPAL_SHPC_DEV_PRESENT; } *val = OPAL_PCI_SLOT_EMPTY; return OPAL_SHPC_DEV_NOT_PRESENT; } /* * Anything else, we assume device present, the link state * machine will perform an early bail out if no electrical * signaling is established after a second. */ return OPAL_SHPC_DEV_PRESENT; } static int64_t phb4_get_link_state(struct pci_slot *slot, uint8_t *val) { struct phb4 *p = phb_to_phb4(slot->phb); uint64_t reg; uint16_t state; int64_t rc; /* Link is up, let's find the actual speed */ reg = in_be64(p->regs + PHB_PCIE_DLP_TRAIN_CTL); if (!(reg & PHB_PCIE_DLP_TL_LINKACT)) { *val = 0; return OPAL_SUCCESS; } rc = phb4_pcicfg_read16(&p->phb, 0, p->ecap + PCICAP_EXP_LSTAT, &state); if (rc != OPAL_SUCCESS) { PHBERR(p, "%s: Error %lld getting link state\n", __func__, rc); return OPAL_HARDWARE; } if (state & PCICAP_EXP_LSTAT_DLLL_ACT) *val = ((state & PCICAP_EXP_LSTAT_WIDTH) >> 4); else *val = 0; return OPAL_SUCCESS; } static int64_t phb4_retry_state(struct pci_slot *slot) { struct phb4 *p = phb_to_phb4(slot->phb); if (slot->retry_state == PCI_SLOT_STATE_NORMAL) return OPAL_WRONG_STATE; PHBDBG(p, "Retry state %08x\n", slot->retry_state); slot->delay_tgt_tb = 0; pci_slot_set_state(slot, slot->retry_state); slot->retry_state = PCI_SLOT_STATE_NORMAL; return slot->ops.run_sm(slot); } static int64_t phb4_poll_link(struct pci_slot *slot) { struct phb4 *p = phb_to_phb4(slot->phb); uint64_t reg; int64_t rc; switch (slot->state) { case PHB4_SLOT_NORMAL: case PHB4_SLOT_LINK_START: PHBDBG(p, "LINK: Start polling\n"); slot->retries = PHB4_LINK_ELECTRICAL_RETRIES; pci_slot_set_state(slot, PHB4_SLOT_LINK_WAIT_ELECTRICAL); return pci_slot_set_sm_timeout(slot, msecs_to_tb(100)); case PHB4_SLOT_LINK_WAIT_ELECTRICAL: /* * Wait for the link electrical connection to be * established (shorter timeout). This allows us to * workaround spurrious presence detect on some machines * without waiting 10s each time * * Note: We *also* check for the full link up bit here * because simics doesn't seem to implement the electrical * link bit at all */ reg = in_be64(p->regs + PHB_PCIE_DLP_TRAIN_CTL); if (reg & (PHB_PCIE_DLP_INBAND_PRESENCE | PHB_PCIE_DLP_TL_LINKACT)) { PHBDBG(p, "LINK: Electrical link detected\n"); pci_slot_set_state(slot, PHB4_SLOT_LINK_WAIT); slot->retries = PHB4_LINK_WAIT_RETRIES; return pci_slot_set_sm_timeout(slot, msecs_to_tb(100)); } if (slot->retries-- == 0) { PHBDBG(p, "LINK: Timeout waiting for electrical link\n"); PHBDBG(p, "LINK: DLP train control: 0x%016llx\n", reg); rc = phb4_retry_state(slot); if (rc >= OPAL_SUCCESS) return rc; pci_slot_set_state(slot, PHB4_SLOT_NORMAL); return OPAL_SUCCESS; } return pci_slot_set_sm_timeout(slot, msecs_to_tb(100)); case PHB4_SLOT_LINK_WAIT: reg = in_be64(p->regs + PHB_PCIE_DLP_TRAIN_CTL); if (reg & PHB_PCIE_DLP_TL_LINKACT) { PHBDBG(p, "LINK: Link is up\n"); if (slot->ops.prepare_link_change) slot->ops.prepare_link_change(slot, true); pci_slot_set_state(slot, PHB4_SLOT_NORMAL); return OPAL_SUCCESS; } if (slot->retries-- == 0) { PHBDBG(p, "LINK: Timeout waiting for link up\n"); PHBDBG(p, "LINK: DLP train control: 0x%016llx\n", reg); rc = phb4_retry_state(slot); if (rc >= OPAL_SUCCESS) return rc; pci_slot_set_state(slot, PHB4_SLOT_NORMAL); return OPAL_SUCCESS; } return pci_slot_set_sm_timeout(slot, msecs_to_tb(100)); default: PHBERR(p, "LINK: Unexpected slot state %08x\n", slot->state); } pci_slot_set_state(slot, PHB4_SLOT_NORMAL); return OPAL_HARDWARE; } static int64_t phb4_hreset(struct pci_slot *slot) { struct phb4 *p = phb_to_phb4(slot->phb); uint16_t brctl; uint8_t presence = 1; switch (slot->state) { case PHB4_SLOT_NORMAL: PHBDBG(p, "HRESET: Starts\n"); if (slot->ops.get_presence_state) slot->ops.get_presence_state(slot, &presence); if (!presence) { PHBDBG(p, "HRESET: No device\n"); return OPAL_SUCCESS; } PHBDBG(p, "HRESET: Prepare for link down\n"); if (slot->ops.prepare_link_change) slot->ops.prepare_link_change(slot, false); /* fall through */ case PHB4_SLOT_HRESET_START: PHBDBG(p, "HRESET: Assert\n"); phb4_pcicfg_read16(&p->phb, 0, PCI_CFG_BRCTL, &brctl); brctl |= PCI_CFG_BRCTL_SECONDARY_RESET; phb4_pcicfg_write16(&p->phb, 0, PCI_CFG_BRCTL, brctl); pci_slot_set_state(slot, PHB4_SLOT_HRESET_DELAY); return pci_slot_set_sm_timeout(slot, secs_to_tb(1)); case PHB4_SLOT_HRESET_DELAY: PHBDBG(p, "HRESET: Deassert\n"); phb4_pcicfg_read16(&p->phb, 0, PCI_CFG_BRCTL, &brctl); brctl &= ~PCI_CFG_BRCTL_SECONDARY_RESET; phb4_pcicfg_write16(&p->phb, 0, PCI_CFG_BRCTL, brctl); /* * Due to some oddball adapters bouncing the link * training a couple of times, we wait for a full second * before we start checking the link status, otherwise * we can get a spurrious link down interrupt which * causes us to EEH immediately. */ pci_slot_set_state(slot, PHB4_SLOT_HRESET_DELAY2); return pci_slot_set_sm_timeout(slot, secs_to_tb(1)); case PHB4_SLOT_HRESET_DELAY2: pci_slot_set_state(slot, PHB4_SLOT_LINK_START); return slot->ops.poll_link(slot); default: PHBERR(p, "Unexpected slot state %08x\n", slot->state); } pci_slot_set_state(slot, PHB4_SLOT_NORMAL); return OPAL_HARDWARE; } static int64_t phb4_freset(struct pci_slot *slot) { struct phb4 *p = phb_to_phb4(slot->phb); uint8_t presence = 1; uint64_t reg; switch(slot->state) { case PHB4_SLOT_NORMAL: PHBDBG(p, "FRESET: Starts\n"); /* Nothing to do without adapter connected */ if (slot->ops.get_presence_state) slot->ops.get_presence_state(slot, &presence); if (!presence) { PHBDBG(p, "FRESET: No device\n"); return OPAL_SUCCESS; } PHBDBG(p, "FRESET: Prepare for link down\n"); slot->retry_state = PHB4_SLOT_FRESET_START; if (slot->ops.prepare_link_change) slot->ops.prepare_link_change(slot, false); /* fall through */ case PHB4_SLOT_FRESET_START: if (!p->skip_perst) { PHBDBG(p, "FRESET: Assert\n"); reg = in_be64(p->regs + PHB_PCIE_CRESET); reg &= ~PHB_PCIE_CRESET_PERST_N; out_be64(p->regs + PHB_PCIE_CRESET, reg); pci_slot_set_state(slot, PHB4_SLOT_FRESET_ASSERT_DELAY); return pci_slot_set_sm_timeout(slot, secs_to_tb(1)); } /* To skip the assert during boot time */ PHBDBG(p, "FRESET: Assert skipped\n"); pci_slot_set_state(slot, PHB4_SLOT_FRESET_ASSERT_DELAY); p->skip_perst = false; /* fall through */ case PHB4_SLOT_FRESET_ASSERT_DELAY: PHBDBG(p, "FRESET: Deassert\n"); reg = in_be64(p->regs + PHB_PCIE_CRESET); reg |= PHB_PCIE_CRESET_PERST_N; out_be64(p->regs + PHB_PCIE_CRESET, reg); pci_slot_set_state(slot, PHB4_SLOT_FRESET_DEASSERT_DELAY); /* CAPP FPGA requires 1s to flash before polling link */ return pci_slot_set_sm_timeout(slot, secs_to_tb(1)); case PHB4_SLOT_FRESET_DEASSERT_DELAY: pci_slot_set_state(slot, PHB4_SLOT_LINK_START); return slot->ops.poll_link(slot); default: PHBERR(p, "Unexpected slot state %08x\n", slot->state); } pci_slot_set_state(slot, PHB4_SLOT_NORMAL); return OPAL_HARDWARE; } static int64_t phb4_creset(struct pci_slot *slot) { struct phb4 *p = phb_to_phb4(slot->phb); switch (slot->state) { case PHB4_SLOT_NORMAL: case PHB4_SLOT_CRESET_START: PHBDBG(p, "CRESET: Starts\n"); /* do steps 3-5 of capp recovery procedure */ #if 0 if (p->flags & PHB4_CAPP_RECOVERY) do_capp_recovery_scoms(p); #endif /* XXX TODO XXX */ pci_slot_set_state(slot, PHB4_SLOT_CRESET_WAIT_CQ); slot->retries = 500; return pci_slot_set_sm_timeout(slot, msecs_to_tb(10)); case PHB4_SLOT_CRESET_WAIT_CQ: /* XXX TODO XXX */ pci_slot_set_state(slot, PHB4_SLOT_CRESET_REINIT); return pci_slot_set_sm_timeout(slot, msecs_to_tb(100)); case PHB4_SLOT_CRESET_REINIT: p->flags &= ~PHB4_AIB_FENCED; p->flags &= ~PHB4_CAPP_RECOVERY; phb4_init_hw(p, false); pci_slot_set_state(slot, PHB4_SLOT_CRESET_FRESET); return pci_slot_set_sm_timeout(slot, msecs_to_tb(100)); case PHB4_SLOT_CRESET_FRESET: pci_slot_set_state(slot, PHB4_SLOT_NORMAL); return slot->ops.freset(slot); default: PHBERR(p, "CRESET: Unexpected slot state %08x\n", slot->state); } /* Mark the PHB as dead and expect it to be removed */ p->state = PHB4_STATE_BROKEN; return OPAL_HARDWARE; } /* * Initialize root complex slot, which is mainly used to * do fundamental reset before PCI enumeration in PCI core. * When probing root complex and building its real slot, * the operations will be copied over. */ static struct pci_slot *phb4_slot_create(struct phb *phb) { struct pci_slot *slot; slot = pci_slot_alloc(phb, NULL); if (!slot) return slot; /* Elementary functions */ slot->ops.get_presence_state = phb4_get_presence_state; slot->ops.get_link_state = phb4_get_link_state; slot->ops.get_power_state = NULL; slot->ops.get_attention_state = NULL; slot->ops.get_latch_state = NULL; slot->ops.set_power_state = NULL; slot->ops.set_attention_state = NULL; /* * For PHB slots, we have to split the fundamental reset * into 2 steps. We might not have the first step which * is to power off/on the slot, or it's controlled by * individual platforms. */ slot->ops.prepare_link_change = phb4_prepare_link_change; slot->ops.poll_link = phb4_poll_link; slot->ops.hreset = phb4_hreset; slot->ops.freset = phb4_freset; slot->ops.creset = phb4_creset; return slot; } static int64_t phb4_eeh_freeze_status(struct phb *phb, uint64_t pe_number, uint8_t *freeze_state, uint16_t *pci_error_type, uint16_t *severity, uint64_t *phb_status) { struct phb4 *p = phb_to_phb4(phb); uint64_t peev_bit = PPC_BIT(pe_number & 0x3f); uint64_t peev, pesta, pestb; /* Defaults: not frozen */ *freeze_state = OPAL_EEH_STOPPED_NOT_FROZEN; *pci_error_type = OPAL_EEH_NO_ERROR; /* Check dead */ if (p->state == PHB4_STATE_BROKEN) { *freeze_state = OPAL_EEH_STOPPED_MMIO_DMA_FREEZE; *pci_error_type = OPAL_EEH_PHB_ERROR; if (severity) *severity = OPAL_EEH_SEV_PHB_DEAD; return OPAL_HARDWARE; } /* Check fence and CAPP recovery */ if (phb4_fenced(p) || (p->flags & PHB4_CAPP_RECOVERY)) { *freeze_state = OPAL_EEH_STOPPED_MMIO_DMA_FREEZE; *pci_error_type = OPAL_EEH_PHB_ERROR; if (severity) *severity = OPAL_EEH_SEV_PHB_FENCED; goto bail; } /* Check the PEEV */ phb4_ioda_sel(p, IODA3_TBL_PEEV, pe_number / 64, false); peev = in_be64(p->regs + PHB_IODA_DATA0); if (!(peev & peev_bit)) return OPAL_SUCCESS; /* Indicate that we have an ER pending */ phb4_set_err_pending(p, true); if (severity) *severity = OPAL_EEH_SEV_PE_ER; /* Read the PESTA & PESTB */ phb4_ioda_sel(p, IODA3_TBL_PESTA, pe_number, false); pesta = in_be64(p->regs + PHB_IODA_DATA0); phb4_ioda_sel(p, IODA3_TBL_PESTB, pe_number, false); pestb = in_be64(p->regs + PHB_IODA_DATA0); /* Convert them */ if (pesta & IODA3_PESTA_MMIO_FROZEN) *freeze_state |= OPAL_EEH_STOPPED_MMIO_FREEZE; if (pestb & IODA3_PESTB_DMA_STOPPED) *freeze_state |= OPAL_EEH_STOPPED_DMA_FREEZE; bail: if (phb_status) PHBERR(p, "%s: deprecated PHB status\n", __func__); return OPAL_SUCCESS; } static int64_t phb4_eeh_freeze_clear(struct phb *phb, uint64_t pe_number, uint64_t eeh_action_token) { struct phb4 *p = phb_to_phb4(phb); uint64_t err, peev; int32_t i; bool frozen_pe = false; if (p->state == PHB4_STATE_BROKEN) return OPAL_HARDWARE; /* Summary. If nothing, move to clearing the PESTs which can * contain a freeze state from a previous error or simply set * explicitely by the user */ err = in_be64(p->regs + PHB_ETU_ERR_SUMMARY); if (err == 0xffffffffffffffff) { if (phb4_fenced(p)) { PHBERR(p, "eeh_freeze_clear on fenced PHB\n"); return OPAL_HARDWARE; } } if (err != 0) phb4_err_ER_clear(p); /* * We have PEEV in system memory. It would give more performance * to access that directly. */ if (eeh_action_token & OPAL_EEH_ACTION_CLEAR_FREEZE_MMIO) { phb4_ioda_sel(p, IODA3_TBL_PESTA, pe_number, false); out_be64(p->regs + PHB_IODA_DATA0, 0); } if (eeh_action_token & OPAL_EEH_ACTION_CLEAR_FREEZE_DMA) { phb4_ioda_sel(p, IODA3_TBL_PESTB, pe_number, false); out_be64(p->regs + PHB_IODA_DATA0, 0); } /* Update ER pending indication */ phb4_ioda_sel(p, IODA3_TBL_PEEV, 0, true); for (i = 0; i < p->num_pes/64; i++) { peev = in_be64(p->regs + PHB_IODA_DATA0); if (peev) { frozen_pe = true; break; } } if (frozen_pe) { p->err.err_src = PHB4_ERR_SRC_PHB; p->err.err_class = PHB4_ERR_CLASS_ER; p->err.err_bit = -1; phb4_set_err_pending(p, true); } else phb4_set_err_pending(p, false); return OPAL_SUCCESS; } static int64_t phb4_eeh_freeze_set(struct phb *phb, uint64_t pe_number, uint64_t eeh_action_token) { struct phb4 *p = phb_to_phb4(phb); uint64_t data; if (p->state == PHB4_STATE_BROKEN) return OPAL_HARDWARE; if (pe_number >= p->num_pes) return OPAL_PARAMETER; if (eeh_action_token != OPAL_EEH_ACTION_SET_FREEZE_MMIO && eeh_action_token != OPAL_EEH_ACTION_SET_FREEZE_DMA && eeh_action_token != OPAL_EEH_ACTION_SET_FREEZE_ALL) return OPAL_PARAMETER; if (eeh_action_token & OPAL_EEH_ACTION_SET_FREEZE_MMIO) { phb4_ioda_sel(p, IODA3_TBL_PESTA, pe_number, false); data = in_be64(p->regs + PHB_IODA_DATA0); data |= IODA3_PESTA_MMIO_FROZEN; out_be64(p->regs + PHB_IODA_DATA0, data); } if (eeh_action_token & OPAL_EEH_ACTION_SET_FREEZE_DMA) { phb4_ioda_sel(p, IODA3_TBL_PESTB, pe_number, false); data = in_be64(p->regs + PHB_IODA_DATA0); data |= IODA3_PESTB_DMA_STOPPED; out_be64(p->regs + PHB_IODA_DATA0, data); } return OPAL_SUCCESS; } static int64_t phb4_eeh_next_error(struct phb *phb, uint64_t *first_frozen_pe, uint16_t *pci_error_type, uint16_t *severity) { struct phb4 *p = phb_to_phb4(phb); uint64_t peev; uint32_t peev_size = p->num_pes/64; int32_t i, j; /* If the PHB is broken, we needn't go forward */ if (p->state == PHB4_STATE_BROKEN) { *pci_error_type = OPAL_EEH_PHB_ERROR; *severity = OPAL_EEH_SEV_PHB_DEAD; return OPAL_SUCCESS; } if ((p->flags & PHB4_CAPP_RECOVERY)) { *pci_error_type = OPAL_EEH_PHB_ERROR; *severity = OPAL_EEH_SEV_PHB_FENCED; return OPAL_SUCCESS; } /* * Check if we already have pending errors. If that's * the case, then to get more information about the * pending errors. Here we try PBCQ prior to PHB. */ if (phb4_err_pending(p) /*&& !phb4_err_check_pbcq(p) && !phb4_err_check_lem(p) */) phb4_set_err_pending(p, false); /* Clear result */ *pci_error_type = OPAL_EEH_NO_ERROR; *severity = OPAL_EEH_SEV_NO_ERROR; *first_frozen_pe = (uint64_t)-1; /* Check frozen PEs */ if (!phb4_err_pending(p)) { phb4_ioda_sel(p, IODA3_TBL_PEEV, 0, true); for (i = 0; i < peev_size; i++) { peev = in_be64(p->regs + PHB_IODA_DATA0); if (peev) { p->err.err_src = PHB4_ERR_SRC_PHB; p->err.err_class = PHB4_ERR_CLASS_ER; p->err.err_bit = -1; phb4_set_err_pending(p, true); break; } } } /* Mapping errors */ if (phb4_err_pending(p)) { /* * If the frozen PE is caused by a malfunctioning TLP, we * need reset the PHB. So convert ER to PHB-fatal error * for the case. */ if (p->err.err_class == PHB4_ERR_CLASS_ER) { #if 0 // FIXME XXXXX fir = phb4_read_reg_asb(p, PHB_LEM_FIR_ACCUM); if (fir & PPC_BIT(60)) { phb4_pcicfg_read32(&p->phb, 0, p->aercap + PCIECAP_AER_UE_STATUS, &cfg32); if (cfg32 & PCIECAP_AER_UE_MALFORMED_TLP) p->err.err_class = PHB4_ERR_CLASS_FENCED; } #endif } switch (p->err.err_class) { case PHB4_ERR_CLASS_DEAD: *pci_error_type = OPAL_EEH_PHB_ERROR; *severity = OPAL_EEH_SEV_PHB_DEAD; break; case PHB4_ERR_CLASS_FENCED: *pci_error_type = OPAL_EEH_PHB_ERROR; *severity = OPAL_EEH_SEV_PHB_FENCED; break; case PHB4_ERR_CLASS_ER: *pci_error_type = OPAL_EEH_PE_ERROR; *severity = OPAL_EEH_SEV_PE_ER; for (i = peev_size - 1; i >= 0; i--) { phb4_ioda_sel(p, IODA3_TBL_PEEV, i, false); peev = in_be64(p->regs + PHB_IODA_DATA0); for (j = 0; j < 64; j++) { if (peev & PPC_BIT(j)) { *first_frozen_pe = i * 64 + j; break; } } if (*first_frozen_pe != (uint64_t)(-1)) break; } /* No frozen PE ? */ if (*first_frozen_pe == (uint64_t)-1) { *pci_error_type = OPAL_EEH_NO_ERROR; *severity = OPAL_EEH_SEV_NO_ERROR; phb4_set_err_pending(p, false); } break; case PHB4_ERR_CLASS_INF: *pci_error_type = OPAL_EEH_PHB_ERROR; *severity = OPAL_EEH_SEV_INF; break; default: *pci_error_type = OPAL_EEH_NO_ERROR; *severity = OPAL_EEH_SEV_NO_ERROR; phb4_set_err_pending(p, false); } } return OPAL_SUCCESS; } static int64_t phb4_err_inject(struct phb *phb, uint64_t pe_number, uint32_t type, uint32_t func, uint64_t addr, uint64_t mask) { return OPAL_UNSUPPORTED; } static int64_t phb4_get_diag_data(struct phb *phb, void *diag_buffer, uint64_t diag_buffer_len) { struct phb4 *p = phb_to_phb4(phb); struct OpalIoPhb4ErrorData *data = diag_buffer; if (diag_buffer_len < sizeof(struct OpalIoPhb4ErrorData)) return OPAL_PARAMETER; if (p->state == PHB4_STATE_BROKEN) return OPAL_HARDWARE; /* * Dummy check for fence so that phb4_read_phb_status knows * whether to use ASB or AIB */ phb4_fenced(p); phb4_read_phb_status(p, data); /* * We're running to here probably because of errors * (INF class). For that case, we need clear the error * explicitly. */ if (phb4_err_pending(p) && p->err.err_class == PHB4_ERR_CLASS_INF && p->err.err_src == PHB4_ERR_SRC_PHB) { phb4_err_ER_clear(p); phb4_set_err_pending(p, false); } return OPAL_SUCCESS; } static const struct phb_ops phb4_ops = { .cfg_read8 = phb4_pcicfg_read8, .cfg_read16 = phb4_pcicfg_read16, .cfg_read32 = phb4_pcicfg_read32, .cfg_write8 = phb4_pcicfg_write8, .cfg_write16 = phb4_pcicfg_write16, .cfg_write32 = phb4_pcicfg_write32, .choose_bus = phb4_choose_bus, .get_reserved_pe_number = phb4_get_reserved_pe_number, .device_init = phb4_device_init, .device_remove = NULL, .ioda_reset = phb4_ioda_reset, .papr_errinjct_reset = phb4_papr_errinjct_reset, .pci_reinit = phb4_pci_reinit, .set_phb_mem_window = phb4_set_phb_mem_window, .phb_mmio_enable = phb4_phb_mmio_enable, .map_pe_mmio_window = phb4_map_pe_mmio_window, .map_pe_dma_window = phb4_map_pe_dma_window, .map_pe_dma_window_real = phb4_map_pe_dma_window_real, .set_xive_pe = phb4_set_ive_pe, .get_msi_32 = phb4_get_msi_32, .get_msi_64 = phb4_get_msi_64, .set_pe = phb4_set_pe, .set_peltv = phb4_set_peltv, .eeh_freeze_status = phb4_eeh_freeze_status, .eeh_freeze_clear = phb4_eeh_freeze_clear, .eeh_freeze_set = phb4_eeh_freeze_set, .next_error = phb4_eeh_next_error, .err_inject = phb4_err_inject, .get_diag_data = NULL, .get_diag_data2 = phb4_get_diag_data, .tce_kill = phb4_tce_kill, }; static void phb4_init_ioda3(struct phb4 *p) { /* Init_17 - Interrupt Notify Base Address */ out_be64(p->regs + PHB_INT_NOTIFY_ADDR, p->irq_port); /* Init_18 - Interrupt Notify Base Index */ out_be64(p->regs + PHB_INT_NOTIFY_INDEX, xive_get_notify_base(p->base_msi)); /* Init_xx - Not in spec: Initialize source ID */ PHBDBG(p, "Reset state SRC_ID: %016llx\n", in_be64(p->regs + PHB_LSI_SOURCE_ID)); out_be64(p->regs + PHB_LSI_SOURCE_ID, SETFIELD(PHB_LSI_SRC_ID, 0ull, (p->num_irqs - 1) >> 3)); /* Init_19 - RTT BAR */ out_be64(p->regs + PHB_RTT_BAR, p->tbl_rtt | PHB_RTT_BAR_ENABLE); /* Init_20 - PELT-V BAR */ out_be64(p->regs + PHB_PELTV_BAR, p->tbl_peltv | PHB_PELTV_BAR_ENABLE); /* Init_21 - Setup M32 starting address */ out_be64(p->regs + PHB_M32_START_ADDR, M32_PCI_START); /* Init_22 - Setup PEST BAR */ out_be64(p->regs + PHB_PEST_BAR, p->tbl_pest | PHB_PEST_BAR_ENABLE); /* Init_23 - CRW Base Address Reg */ // XXX FIXME learn CAPI :-( /* Init_24 - ASN Compare/Mask */ // XXX FIXME learn CAPI :-( /* Init_25 - CAPI Compare/Mask */ // XXX FIXME learn CAPI :-( /* Init_26 - PCIE Outbound upper address */ out_be64(p->regs + PHB_M64_UPPER_BITS, 0); /* Init_27 - PHB4 Configuration */ out_be64(p->regs + PHB_PHB4_CONFIG, PHB_PHB4C_32BIT_MSI_EN | PHB_PHB4C_64BIT_MSI_EN); /* Init_28 - At least 256ns delay according to spec. Do a dummy * read first to flush posted writes */ in_be64(p->regs + PHB_PHB4_CONFIG); time_wait_us(2); /* Init_29..40 - On-chip IODA tables init */ phb4_ioda_reset(&p->phb, false); } /* phb4_init_rc - Initialize the Root Complex config space */ static bool phb4_init_rc_cfg(struct phb4 *p) { int64_t ecap, aercap; /* XXX Handle errors ? */ /* Init_45: * * Set primary bus to 0, secondary to 1 and subordinate to 0xff */ phb4_pcicfg_write32(&p->phb, 0, PCI_CFG_PRIMARY_BUS, 0x00ff0100); /* Init_46 - Clear errors */ phb4_pcicfg_write16(&p->phb, 0, PCI_CFG_SECONDARY_STATUS, 0xffff); /* Init_47 * * PCIE Device control/status, enable error reporting, disable relaxed * ordering, set MPS to 128 (see note), clear errors. * * Note: The doc recommends to set MPS to 512. This has proved to have * some issues as it requires specific claming of MRSS on devices and * we've found devices in the field that misbehave when doing that. * * We currently leave it all to 128 bytes (minimum setting) at init * time. The generic PCIe probing later on might apply a different * value, or the kernel will, but we play it safe at early init */ if (p->ecap <= 0) { ecap = pci_find_cap(&p->phb, 0, PCI_CFG_CAP_ID_EXP); if (ecap < 0) { PHBERR(p, "Can't locate PCI-E capability\n"); return false; } p->ecap = ecap; } else { ecap = p->ecap; } phb4_pcicfg_write16(&p->phb, 0, ecap + PCICAP_EXP_DEVSTAT, PCICAP_EXP_DEVSTAT_CE | PCICAP_EXP_DEVSTAT_NFE | PCICAP_EXP_DEVSTAT_FE | PCICAP_EXP_DEVSTAT_UE); phb4_pcicfg_write16(&p->phb, 0, ecap + PCICAP_EXP_DEVCTL, PCICAP_EXP_DEVCTL_CE_REPORT | PCICAP_EXP_DEVCTL_NFE_REPORT | PCICAP_EXP_DEVCTL_FE_REPORT | PCICAP_EXP_DEVCTL_UR_REPORT | SETFIELD(PCICAP_EXP_DEVCTL_MPS, 0, PCIE_MPS_128B)); /* Init_48 - Device Control/Status 2 */ phb4_pcicfg_write16(&p->phb, 0, ecap + PCICAP_EXP_DCTL2, SETFIELD(PCICAP_EXP_DCTL2_CMPTOUT, 0, 0x5) | PCICAP_EXP_DCTL2_ARI_FWD); /* Init_49..53 * * AER inits */ if (p->aercap <= 0) { aercap = pci_find_ecap(&p->phb, 0, PCIECAP_ID_AER, NULL); if (aercap < 0) { PHBERR(p, "Can't locate AER capability\n"); return false; } p->aercap = aercap; } else { aercap = p->aercap; } /* Clear all UE status */ phb4_pcicfg_write32(&p->phb, 0, aercap + PCIECAP_AER_UE_STATUS, 0xffffffff); /* Disable some error reporting as per the PHB4 spec */ phb4_pcicfg_write32(&p->phb, 0, aercap + PCIECAP_AER_UE_MASK, PCIECAP_AER_UE_POISON_TLP | PCIECAP_AER_UE_COMPL_TIMEOUT | PCIECAP_AER_UE_COMPL_ABORT); /* Clear all CE status */ phb4_pcicfg_write32(&p->phb, 0, aercap + PCIECAP_AER_CE_STATUS, 0xffffffff); /* Enable ECRC generation & checking */ phb4_pcicfg_write32(&p->phb, 0, aercap + PCIECAP_AER_CAPCTL, PCIECAP_AER_CAPCTL_ECRCG_EN | PCIECAP_AER_CAPCTL_ECRCC_EN); /* Clear root error status */ phb4_pcicfg_write32(&p->phb, 0, aercap + PCIECAP_AER_RERR_STA, 0xffffffff); return true; } static void phb4_init_errors(struct phb4 *p) { /* Init_54..62 - PBL errors */ out_be64(p->regs + 0x1900, 0xffffffffffffffffull); out_be64(p->regs + 0x1908, 0x0000000000000000ull); out_be64(p->regs + 0x1920, 0x000000004d1780f8ull); out_be64(p->regs + 0x1928, 0x0000000000000000ull); out_be64(p->regs + 0x1930, 0xffffffffb2e87f07ull); out_be64(p->regs + 0x1940, 0x0000000000000000ull); out_be64(p->regs + 0x1948, 0x0000000000000000ull); out_be64(p->regs + 0x1950, 0x0000000000000000ull); out_be64(p->regs + 0x1958, 0x0000000000000000ull); /* Init_63..71 - REGB errors */ out_be64(p->regs + 0x1c00, 0xffffffffffffffffull); out_be64(p->regs + 0x1c08, 0x0000000000000000ull); out_be64(p->regs + 0x1c20, 0x2130006efca8bc00ull); out_be64(p->regs + 0x1c28, 0x0000000000000000ull); out_be64(p->regs + 0x1c30, 0xde8fff91035743ffull); out_be64(p->regs + 0x1c40, 0x0000000000000000ull); out_be64(p->regs + 0x1c48, 0x0000000000000000ull); out_be64(p->regs + 0x1c50, 0x0000000000000000ull); out_be64(p->regs + 0x1c58, 0x0000000000000000ull); /* Init_72..80 - TXE errors */ out_be64(p->regs + 0x0d00, 0xffffffffffffffffull); out_be64(p->regs + 0x0d08, 0x0000000000000000ull); out_be64(p->regs + 0x0d18, 0xffffffffffffffffull); out_be64(p->regs + 0x0d28, 0x0000400a00000000ull); out_be64(p->regs + 0x0d30, 0xdff7fd01f7ddfff0ull); /* XXX CAPI has diff. value */ out_be64(p->regs + 0x0d40, 0x0000000000000000ull); out_be64(p->regs + 0x0d48, 0x0000000000000000ull); out_be64(p->regs + 0x0d50, 0x0000000000000000ull); out_be64(p->regs + 0x0d58, 0x0000000000000000ull); /* Init_81..89 - RXE_ARB errors */ out_be64(p->regs + 0x0d80, 0xffffffffffffffffull); out_be64(p->regs + 0x0d88, 0x0000000000000000ull); out_be64(p->regs + 0x0d98, 0xffffffffffffffffull); if (p->rev == PHB4_REV_NIMBUS_DD10) out_be64(p->regs + 0x0da8, 0xc00000b801000060ull); else out_be64(p->regs + 0x0da8, 0xc00008b801000060ull); out_be64(p->regs + 0x0db0, 0x3bffd703fe7fbf8full); /* XXX CAPI has diff. value */ out_be64(p->regs + 0x0dc0, 0x0000000000000000ull); out_be64(p->regs + 0x0dc8, 0x0000000000000000ull); out_be64(p->regs + 0x0dd0, 0x0000000000000000ull); out_be64(p->regs + 0x0dd8, 0x0000000000000000ull); /* Init_90..98 - RXE_MRG errors */ out_be64(p->regs + 0x0e00, 0xffffffffffffffffull); out_be64(p->regs + 0x0e08, 0x0000000000000000ull); out_be64(p->regs + 0x0e18, 0xffffffffffffffffull); out_be64(p->regs + 0x0e28, 0x0000600000000000ull); out_be64(p->regs + 0x0e30, 0xffff9effff7fff57ull); /* XXX CAPI has diff. value */ out_be64(p->regs + 0x0e40, 0x0000000000000000ull); out_be64(p->regs + 0x0e48, 0x0000000000000000ull); out_be64(p->regs + 0x0e50, 0x0000000000000000ull); out_be64(p->regs + 0x0e58, 0x0000000000000000ull); /* Init_99..107 - RXE_TCE errors */ out_be64(p->regs + 0x0e80, 0xffffffffffffffffull); out_be64(p->regs + 0x0e88, 0x0000000000000000ull); out_be64(p->regs + 0x0e98, 0xffffffffffffffffull); if (p->rev == PHB4_REV_NIMBUS_DD10) out_be64(p->regs + 0x0ea8, 0x6000000000000000ull); else out_be64(p->regs + 0x0ea8, 0x60000000c0000000ull); out_be64(p->regs + 0x0eb0, 0x9faeffaf3fffffffull); /* XXX CAPI has diff. value */ out_be64(p->regs + 0x0ec0, 0x0000000000000000ull); out_be64(p->regs + 0x0ec8, 0x0000000000000000ull); out_be64(p->regs + 0x0ed0, 0x0000000000000000ull); out_be64(p->regs + 0x0ed8, 0x0000000000000000ull); /* Init_108..116 - RXPHB errors */ out_be64(p->regs + 0x0c80, 0xffffffffffffffffull); out_be64(p->regs + 0x0c88, 0x0000000000000000ull); out_be64(p->regs + 0x0c98, 0xffffffffffffffffull); out_be64(p->regs + 0x0ca8, 0x0000004000000000ull); out_be64(p->regs + 0x0cb0, 0x35777033ff000000ull); /* XXX CAPI has diff. value */ out_be64(p->regs + 0x0cc0, 0x0000000000000000ull); out_be64(p->regs + 0x0cc8, 0x0000000000000000ull); out_be64(p->regs + 0x0cd0, 0x0000000000000000ull); out_be64(p->regs + 0x0cd8, 0x0000000000000000ull); /* Init_117..120 - LEM */ out_be64(p->regs + 0x0c00, 0x0000000000000000ull); out_be64(p->regs + 0x0c30, 0xffffffffffffffffull); out_be64(p->regs + 0x0c38, 0xffffffffffffffffull); out_be64(p->regs + 0x0c40, 0x0000000000000000ull); } static void phb4_init_hw(struct phb4 *p, bool first_init) { uint64_t val, creset; PHBDBG(p, "Initializing PHB4...\n"); /* Init_1 - Async reset * * At this point we assume the PHB has already been reset. */ /* Init_2 - Mask FIRs */ out_be64(p->regs + 0xc18, 0xffffffffffffffffull); /* Init_3 - TCE tag enable */ out_be64(p->regs + 0x868, 0xffffffffffffffffull); /* Init_4 - PCIE System Configuration Register * * Adjust max speed based on system config */ val = in_be64(p->regs + PHB_PCIE_SCR); PHBDBG(p, "Default system config: 0x%016llx\n", val); val = SETFIELD(PHB_PCIE_SCR_MAXLINKSPEED, val, p->max_link_speed); out_be64(p->regs + PHB_PCIE_SCR, val); PHBDBG(p, "New system config : 0x%016llx\n", in_be64(p->regs + PHB_PCIE_SCR)); /* Init_5 - deassert CFG reset */ creset = in_be64(p->regs + PHB_PCIE_CRESET); PHBDBG(p, "Initial PHB CRESET is 0x%016llx\n", creset); creset &= ~PHB_PCIE_CRESET_CFG_CORE; out_be64(p->regs + PHB_PCIE_CRESET, creset); /* Init_6..13 - PCIE DLP Lane EQ control */ if (p->lane_eq) { out_be64(p->regs + PHB_PCIE_LANE_EQ_CNTL0, be64_to_cpu(p->lane_eq[0])); out_be64(p->regs + PHB_PCIE_LANE_EQ_CNTL1, be64_to_cpu(p->lane_eq[1])); out_be64(p->regs + PHB_PCIE_LANE_EQ_CNTL2, be64_to_cpu(p->lane_eq[2])); out_be64(p->regs + PHB_PCIE_LANE_EQ_CNTL3, be64_to_cpu(p->lane_eq[3])); out_be64(p->regs + PHB_PCIE_LANE_EQ_CNTL20, be64_to_cpu(p->lane_eq[4])); out_be64(p->regs + PHB_PCIE_LANE_EQ_CNTL21, be64_to_cpu(p->lane_eq[5])); if (p->rev == PHB4_REV_NIMBUS_DD10) { out_be64(p->regs + PHB_PCIE_LANE_EQ_CNTL22, be64_to_cpu(p->lane_eq[6])); out_be64(p->regs + PHB_PCIE_LANE_EQ_CNTL23, be64_to_cpu(p->lane_eq[7])); } } /* Init_14 - Clear link training */ phb4_pcicfg_write32(&p->phb, 0, 0x78, 0x07FE0000 | p->max_link_speed); /* Init_15 - deassert cores reset */ /* * Lift the PHB resets but not PERST, this will be lifted * later by the initial PERST state machine */ creset &= ~(PHB_PCIE_CRESET_TLDLP | PHB_PCIE_CRESET_PBL); creset |= PHB_PCIE_CRESET_PIPE_N; out_be64(p->regs + PHB_PCIE_CRESET, creset); /* Init_16 - PHB Control */ val = PHB_CTRLR_IRQ_PGSZ_64K | SETFIELD(PHB_CTRLR_TVT_ADDR_SEL, 0ull, TVT_2_PER_PE); if (nvram_query_eq("pci-eeh-mmio", "disabled")) val |= PHB_CTRLR_MMIO_EEH_DISABLE; out_be64(p->regs + PHB_CTRLR, val); /* Init_17..40 - Architected IODA3 inits */ phb4_init_ioda3(p); /* Init_41..44 - Clear DLP error logs */ out_be64(p->regs + 0x1aa0, 0xffffffffffffffffull); out_be64(p->regs + 0x1aa8, 0xffffffffffffffffull); out_be64(p->regs + 0x1ab0, 0xffffffffffffffffull); out_be64(p->regs + 0x1ab8, 0x0); /* Init_45..53 : Init root complex config space */ if (!phb4_init_rc_cfg(p)) goto failed; /* Init_54..120 : Setup error registers */ phb4_init_errors(p); /* Init_121..122 : Wait for link * NOTE: At this point the spec waits for the link to come up. We * don't bother as we are doing a PERST soon. */ /* Init_123 : NBW. XXX TODO */ // XXX FIXME learn CAPI :-( /* Init_124 : Setup PCI command/status on root complex * I don't know why the spec does this now and not earlier, so * to be sure to get it right we might want to move it to the freset * state machine, though the generic PCI layer will probably do * this anyway (ie, enable MEM, etc... in the RC) */ phb4_pcicfg_write16(&p->phb, 0, PCI_CFG_CMD, PCI_CFG_CMD_MEM_EN | PCI_CFG_CMD_BUS_MASTER_EN); /* Clear errors */ phb4_pcicfg_write16(&p->phb, 0, PCI_CFG_STAT, PCI_CFG_STAT_SENT_TABORT | PCI_CFG_STAT_RECV_TABORT | PCI_CFG_STAT_RECV_MABORT | PCI_CFG_STAT_SENT_SERR | PCI_CFG_STAT_RECV_PERR); /* Init_125..130 - Re-enable error interrupts */ /* XXX TODO along with EEH/error interrupts support */ /* Init_131 - Enable DMA address speculation */ out_be64(p->regs + PHB_TCE_SPEC_CTL, 0xf000000000000000ull); /* Init_132 - Timeout Control Register 1 */ out_be64(p->regs + PHB_TIMEOUT_CTRL1, 0x0018150000200000ull); /* Init_133 - Timeout Control Register 2 */ out_be64(p->regs + PHB_TIMEOUT_CTRL2, 0x0000181700000000ull); /* Init_134 - PBL Timeout Control Register */ out_be64(p->regs + PHB_PBL_TIMEOUT_CTRL, 0x2015000000000000ull); /* Mark the PHB as functional which enables all the various sequences */ p->state = PHB4_STATE_FUNCTIONAL; PHBDBG(p, "Initialization complete\n"); return; failed: PHBERR(p, "Initialization failed\n"); p->state = PHB4_STATE_BROKEN; } /* FIXME: Use scoms rather than MMIO incase we are fenced */ static bool phb4_read_capabilities(struct phb4 *p) { uint64_t val; /* XXX Should make sure ETU is out of reset ! */ /* Grab version and fit it in an int */ val = phb4_read_reg_asb(p, PHB_VERSION); if (val == 0 || val == 0xffffffffffffffff) { PHBERR(p, "Failed to read version, PHB appears broken\n"); return false; } p->rev = ((val >> 16) & 0x00ff0000) | (val & 0xffff); PHBDBG(p, "Core revision 0x%x\n", p->rev); /* Read EEH capabilities */ val = in_be64(p->regs + PHB_PHB4_EEH_CAP); p->max_num_pes = val >> 52; if (p->max_num_pes >= 512) { p->mrt_size = 16; p->mbt_size = 32; p->tvt_size = 512; } else { p->mrt_size = 8; p->mbt_size = 16; p->tvt_size = 256; } val = in_be64(p->regs + PHB_PHB4_IRQ_CAP); p->num_irqs = val & 0xffff; /* This works for 512 PEs. FIXME calculate for any hardware * size returned above */ p->tbl_peltv_size = PELTV_TABLE_SIZE_MAX; p->tbl_pest_size = p->max_num_pes*16; PHBDBG(p, "Found %d max PEs and %d IRQs \n", p->max_num_pes, p->num_irqs); return true; } static void phb4_allocate_tables(struct phb4 *p) { uint16_t *rte; uint32_t i; /* XXX Our current memalign implementation sucks, * * It will do the job, however it doesn't support freeing * the memory and wastes space by always allocating twice * as much as requested (size + alignment) */ p->tbl_rtt = (uint64_t)local_alloc(p->chip_id, RTT_TABLE_SIZE, RTT_TABLE_SIZE); assert(p->tbl_rtt); rte = (uint16_t *)(p->tbl_rtt); for (i = 0; i < RTT_TABLE_ENTRIES; i++, rte++) *rte = PHB4_RESERVED_PE_NUM(p); p->tbl_peltv = (uint64_t)local_alloc(p->chip_id, p->tbl_peltv_size, p->tbl_peltv_size); assert(p->tbl_peltv); memset((void *)p->tbl_peltv, 0, p->tbl_peltv_size); p->tbl_pest = (uint64_t)local_alloc(p->chip_id, p->tbl_pest_size, p->tbl_pest_size); assert(p->tbl_pest); memset((void *)p->tbl_pest, 0, p->tbl_pest_size); } static void phb4_add_properties(struct phb4 *p) { struct dt_node *np = p->phb.dt_node; uint32_t lsibase, icsp = get_ics_phandle(); uint64_t m32b, m64b, m64s; /* Add various properties that HB doesn't have to * add, some of them simply because they result from * policy decisions made in skiboot rather than in HB * such as the MMIO windows going to PCI, interrupts, * etc... */ dt_add_property_cells(np, "#address-cells", 3); dt_add_property_cells(np, "#size-cells", 2); dt_add_property_cells(np, "#interrupt-cells", 1); dt_add_property_cells(np, "bus-range", 0, 0xff); dt_add_property_cells(np, "clock-frequency", 0x200, 0); /* ??? */ dt_add_property_cells(np, "interrupt-parent", icsp); /* XXX FIXME: add slot-name */ //dt_property_cell("bus-width", 8); /* Figure it out from VPD ? */ /* "ranges", we only expose M32 (PHB4 doesn't do IO) * * Note: The kernel expects us to have chopped of 64k from the * M32 size (for the 32-bit MSIs). If we don't do that, it will * get confused (OPAL does it) */ m32b = cleanup_addr(p->mm1_base); m64b = cleanup_addr(p->mm0_base); m64s = p->mm0_size; dt_add_property_cells(np, "ranges", /* M32 space */ 0x02000000, 0x00000000, M32_PCI_START, hi32(m32b), lo32(m32b), 0, M32_PCI_SIZE - 0x10000); /* XXX FIXME: add opal-memwin32, dmawins, etc... */ dt_add_property_u64s(np, "ibm,opal-m64-window", m64b, m64b, m64s); dt_add_property(np, "ibm,opal-single-pe", NULL, 0); dt_add_property_cells(np, "ibm,opal-num-pes", p->num_pes); dt_add_property_cells(np, "ibm,opal-reserved-pe", PHB4_RESERVED_PE_NUM(p)); dt_add_property_cells(np, "ibm,opal-msi-ranges", p->base_msi, p->num_irqs - 8); /* M64 ranges start at 1 as MBT0 is used for M32 */ dt_add_property_cells(np, "ibm,opal-available-m64-ranges", 1, p->mbt_size - 1); /* Tell Linux about alignment limits for segment splits. * * XXX We currently only expose splits of 1 and "num PEs", */ dt_add_property_cells(np, "ibm,opal-m64-segment-splits", /* Full split, number of segments: */ p->num_pes, /* Encoding passed to the enable call */ OPAL_ENABLE_M64_SPLIT, /* Alignement/size restriction in #bits*/ /* XXX VERIFY VALUE */ 12, /* Unused */ 0, /* single PE, number of segments: */ 1, /* Encoding passed to the enable call */ OPAL_ENABLE_M64_NON_SPLIT, /* Alignement/size restriction in #bits*/ /* XXX VERIFY VALUE */ 12, /* Unused */ 0); /* The interrupt maps will be generated in the RC node by the * PCI code based on the content of this structure: */ lsibase = p->base_lsi; p->phb.lstate.int_size = 2; p->phb.lstate.int_val[0][0] = lsibase + PHB4_LSI_PCIE_INTA; p->phb.lstate.int_val[0][1] = 1; p->phb.lstate.int_val[1][0] = lsibase + PHB4_LSI_PCIE_INTB; p->phb.lstate.int_val[1][1] = 1; p->phb.lstate.int_val[2][0] = lsibase + PHB4_LSI_PCIE_INTC; p->phb.lstate.int_val[2][1] = 1; p->phb.lstate.int_val[3][0] = lsibase + PHB4_LSI_PCIE_INTD; p->phb.lstate.int_val[3][1] = 1; p->phb.lstate.int_parent[0] = icsp; p->phb.lstate.int_parent[1] = icsp; p->phb.lstate.int_parent[2] = icsp; p->phb.lstate.int_parent[3] = icsp; /* Indicators for variable tables */ dt_add_property_cells(np, "ibm,opal-rtt-table", hi32(p->tbl_rtt), lo32(p->tbl_rtt), RTT_TABLE_SIZE); dt_add_property_cells(np, "ibm,opal-peltv-table", hi32(p->tbl_peltv), lo32(p->tbl_peltv), p->tbl_peltv_size); dt_add_property_cells(np, "ibm,opal-pest-table", hi32(p->tbl_pest), lo32(p->tbl_pest), p->tbl_pest_size); dt_add_property_cells(np, "ibm,phb-diag-data-size", sizeof(struct OpalIoPhb4ErrorData)); } static bool phb4_calculate_windows(struct phb4 *p) { const struct dt_property *prop; /* Get PBCQ MMIO windows from device-tree */ prop = dt_require_property(p->phb.dt_node, "ibm,mmio-windows", -1); assert(prop->len >= (2 * sizeof(uint64_t))); p->mm0_base = ((const uint64_t *)prop->prop)[0]; p->mm0_size = ((const uint64_t *)prop->prop)[1]; if (prop->len > 16) { p->mm1_base = ((const uint64_t *)prop->prop)[2]; p->mm1_size = ((const uint64_t *)prop->prop)[3]; } /* Sort them so that 0 is big and 1 is small */ if (p->mm1_size && p->mm1_size > p->mm0_size) { uint64_t b = p->mm0_base; uint64_t s = p->mm0_size; p->mm0_base = p->mm1_base; p->mm0_size = p->mm1_size; p->mm1_base = b; p->mm1_size = s; } /* If 1 is too small, ditch it */ if (p->mm1_size < M32_PCI_SIZE) p->mm1_size = 0; /* If 1 doesn't exist, carve it out of 0 */ if (p->mm1_size == 0) { p->mm0_size /= 2; p->mm1_base = p->mm0_base + p->mm0_size; p->mm1_size = p->mm0_size; } /* Crop mm1 to our desired size */ if (p->mm1_size > M32_PCI_SIZE) p->mm1_size = M32_PCI_SIZE; return true; } static void phb4_err_interrupt(struct irq_source *is, uint32_t isn) { struct phb4 *p = is->data; PHBDBG(p, "Got interrupt 0x%08x\n", isn); #if 0 /* Update pending event */ opal_update_pending_evt(OPAL_EVENT_PCI_ERROR, OPAL_EVENT_PCI_ERROR); /* If the PHB is broken, go away */ if (p->state == PHB3_STATE_BROKEN) return; /* * Mark the PHB has pending error so that the OS * can handle it at late point. */ phb3_set_err_pending(p, true); #endif } static uint64_t phb4_lsi_attributes(struct irq_source *is __unused, uint32_t isn __unused) { #ifndef DISABLE_ERR_INTS struct phb3 *p = is->data; uint32_t idx = isn - p->base_lsi; if (idx == PHB3_LSI_PCIE_INF || idx == PHB3_LSI_PCIE_ER) return IRQ_ATTR_TARGET_OPAL | IRQ_ATTR_TARGET_RARE; #endif return IRQ_ATTR_TARGET_LINUX; } static int64_t phb4_dd1_lsi_set_xive(struct irq_source *is, uint32_t isn, uint16_t server, uint8_t priority) { struct phb4 *p = is->data; uint32_t idx = isn - p->base_lsi; if (idx > 8) return OPAL_PARAMETER; phb_lock(&p->phb); phb4_ioda_sel(p, IODA3_TBL_LIST, idx, false); /* Mask using P=0,Q=1, unmask using P=1,Q=0 followed by EOI */ /* XXX FIXME: A quick mask/umask can make us shoot an interrupt * more than once to a queue. We need to keep track better. * * Thankfully, this is only on DD1 and for LSIs, so will go away * soon enough. */ if (priority == 0xff) out_be64(p->regs + PHB_IODA_DATA0, IODA3_LIST_Q); else { out_be64(p->regs + PHB_IODA_DATA0, IODA3_LIST_P); __irq_source_eoi(is, isn); } phb_unlock(&p->phb); return 0; } static const struct irq_source_ops phb4_dd1_lsi_ops = { .set_xive = phb4_dd1_lsi_set_xive, .interrupt = phb4_err_interrupt, .attributes = phb4_lsi_attributes, }; static const struct irq_source_ops phb4_lsi_ops = { .interrupt = phb4_err_interrupt, .attributes = phb4_lsi_attributes, }; static void phb4_create(struct dt_node *np) { const struct dt_property *prop; struct phb4 *p = zalloc(sizeof(struct phb4)); struct pci_slot *slot; size_t lane_eq_len; struct dt_node *iplp; char *path; uint32_t irq_base; assert(p); /* Populate base stuff */ p->index = dt_prop_get_u32(np, "ibm,phb-index"); p->chip_id = dt_prop_get_u32(np, "ibm,chip-id"); p->regs = (void *)dt_get_address(np, 0, NULL); p->int_mmio = (void *)dt_get_address(np, 1, NULL); p->phb.dt_node = np; p->phb.ops = &phb4_ops; p->phb.phb_type = phb_type_pcie_v4; p->phb.scan_map = 0x1; /* Only device 0 to scan */ p->state = PHB4_STATE_UNINITIALIZED; if (!phb4_calculate_windows(p)) return; /* Get the various XSCOM register bases from the device-tree */ prop = dt_require_property(np, "ibm,xscom-bases", 5 * sizeof(uint32_t)); p->pe_xscom = ((const uint32_t *)prop->prop)[0]; p->pe_stk_xscom = ((const uint32_t *)prop->prop)[1]; p->pci_xscom = ((const uint32_t *)prop->prop)[2]; p->pci_stk_xscom = ((const uint32_t *)prop->prop)[3]; p->etu_xscom = ((const uint32_t *)prop->prop)[4]; /* * We skip the initial PERST assertion requested by the generic code * when doing a cold boot because we are coming out of cold boot already * so we save boot time that way. The PERST state machine will still * handle waiting for the link to come up, it will just avoid actually * asserting & deasserting the PERST output * * For a hot IPL, we still do a PERST * * Note: In absence of property (ie, FSP-less), we stick to the old * behaviour and set skip_perst to true */ p->skip_perst = true; /* Default */ iplp = dt_find_by_path(dt_root, "ipl-params/ipl-params"); if (iplp) { const char *ipl_type = dt_prop_get_def(iplp, "cec-major-type", NULL); if (ipl_type && (!strcmp(ipl_type, "hot"))) p->skip_perst = false; } /* By default link is assumed down */ p->has_link = false; /* We register the PHB before we initialize it so we * get a useful OPAL ID for it */ pci_register_phb(&p->phb, phb4_get_opal_id(p->chip_id, p->index)); /* Create slot structure */ slot = phb4_slot_create(&p->phb); if (!slot) PHBERR(p, "Cannot create PHB slot\n"); /* Hello ! */ path = dt_get_path(np); PHBINF(p, "Found %s @%p\n", path, p->regs); PHBINF(p, " M32 [0x%016llx..0x%016llx]\n", p->mm1_base, p->mm1_base + p->mm1_size - 1); PHBINF(p, " M64 [0x%016llx..0x%016llx]\n", p->mm0_base, p->mm0_base + p->mm0_size - 1); free(path); /* Find base location code from root node */ p->phb.base_loc_code = dt_prop_get_def(dt_root, "ibm,io-base-loc-code", NULL); if (!p->phb.base_loc_code) PHBERR(p, "Base location code not found !\n"); /* * Grab CEC IO VPD load info from the root of the device-tree, * on P8 there's a single such VPD for the whole machine */ prop = dt_find_property(dt_root, "ibm,io-vpd"); if (!prop) { /* LX VPD Lid not already loaded */ vpd_iohub_load(dt_root); } /* Obtain informatin about the PHB from the hardware directly */ if (!phb4_read_capabilities(p)) goto failed; /* Priority order: NVRAM -> dt -> GEN2 dd1 -> GEN4 */ p->max_link_speed = 4; if (p->rev == PHB4_REV_NIMBUS_DD10) p->max_link_speed = 2; if (dt_has_node_property(np, "ibm,max-link-speed", NULL)) p->max_link_speed = dt_prop_get_u32(np, "ibm,max-link-speed"); if (pcie_max_link_speed) p->max_link_speed = pcie_max_link_speed; if (p->max_link_speed > 4) /* clamp to 4 */ p->max_link_speed = 4; PHBINF(p, "Max link speed: GEN%i\n", p->max_link_speed); /* Check for lane equalization values from HB or HDAT */ p->lane_eq = dt_prop_get_def_size(np, "ibm,lane-eq", NULL, &lane_eq_len); if (p->lane_eq) { uint32_t want_len; if (p->rev == PHB4_REV_NIMBUS_DD10) want_len = 8 * 8; else want_len = 6 * 8; if (lane_eq_len != want_len) { PHBERR(p, "Device-tree has ibm,lane-eq with wrong len %ld" " (want %d)\n", lane_eq_len, want_len); p->lane_eq = NULL; } } if (p->lane_eq) { PHBDBG(p, "Override lane equalization settings:\n"); PHBDBG(p, " 0x%016llx 0x%016llx\n", be64_to_cpu(p->lane_eq[0]), be64_to_cpu(p->lane_eq[1])); PHBDBG(p, " 0x%016llx 0x%016llx\n", be64_to_cpu(p->lane_eq[2]), be64_to_cpu(p->lane_eq[3])); PHBDBG(p, " 0x%016llx 0x%016llx\n", be64_to_cpu(p->lane_eq[4]), be64_to_cpu(p->lane_eq[5])); PHBDBG(p, " 0x%016llx 0x%016llx\n", be64_to_cpu(p->lane_eq[6]), be64_to_cpu(p->lane_eq[7])); } /* Allocate a block of interrupts. We need to know if it needs * 2K or 4K interrupts ... for now we just use 4K but that * needs to be fixed */ irq_base = xive_alloc_hw_irqs(p->chip_id, p->num_irqs, p->num_irqs); if (irq_base == XIVE_IRQ_ERROR) { PHBERR(p, "Failed to allocate %d interrupt sources\n", p->num_irqs); goto failed; } p->base_msi = irq_base; p->base_lsi = irq_base + p->num_irqs - 8; p->irq_port = xive_get_notify_port(p->chip_id, XIVE_HW_SRC_PHBn(p->index)); /* * XXXX FIXME: figure out how to deal with TVT entry mess * For now configure for 2 entries per PE and half #PEs. * WARNING: if changing this, update PHB_CTRLR in Init_16 */ p->num_pes = p->max_num_pes/2; /* Allocate the SkiBoot internal in-memory tables for the PHB */ phb4_allocate_tables(p); phb4_add_properties(p); /* Clear IODA3 cache */ phb4_init_ioda_cache(p); /* Get the HW up and running */ phb4_init_hw(p, true); /* Register all interrupt sources with XIVE */ xive_register_hw_source(p->base_msi, p->num_irqs - 8, 16, p->int_mmio, XIVE_SRC_SHIFT_BUG | XIVE_SRC_TRIGGER_PAGE, NULL, NULL); xive_register_hw_source(p->base_lsi, 8, 16, p->int_mmio + ((p->num_irqs - 8) << 16), XIVE_SRC_LSI | XIVE_SRC_SHIFT_BUG, p, (p->rev == PHB4_REV_NIMBUS_DD10) ? &phb4_dd1_lsi_ops : &phb4_lsi_ops); /* Platform additional setup */ if (platform.pci_setup_phb) platform.pci_setup_phb(&p->phb, p->index); dt_add_property_string(np, "status", "okay"); return; failed: p->state = PHB4_STATE_BROKEN; /* Tell Linux it's broken */ dt_add_property_string(np, "status", "error"); } static void phb4_probe_stack(struct dt_node *stk_node, uint32_t pec_index, uint32_t nest_base, uint32_t pci_base) { uint32_t pci_stack, nest_stack, etu_base, gcid, phb_num, stk_index; uint64_t val, phb_bar = 0, irq_bar = 0, bar_en; uint64_t mmio0_bar = 0, mmio0_bmask, mmio0_sz; uint64_t mmio1_bar, mmio1_bmask, mmio1_sz; uint64_t reg[4]; void *foo; uint64_t mmio_win[4]; unsigned int mmio_win_sz; struct dt_node *np; struct proc_chip *chip; char *path; uint64_t capp_ucode_base; unsigned int max_link_speed; gcid = dt_get_chip_id(stk_node); chip = get_chip(gcid); stk_index = dt_prop_get_u32(stk_node, "reg"); phb_num = dt_prop_get_u32(stk_node, "ibm,phb-index"); path = dt_get_path(stk_node); prlog(PR_NOTICE, "PHB: Chip %d Found PHB4 PBCQ%d Stack %d at %s\n", gcid, pec_index, stk_index, path); free(path); pci_stack = pci_base + 0x40 * (stk_index + 1); nest_stack = nest_base + 0x40 * (stk_index + 1); etu_base = pci_base + 0x100 + 0x40 * stk_index; prlog(PR_DEBUG, "PHB[%d:%d] X[PE]=0x%08x/0x%08x X[PCI]=0x%08x/0x%08x X[ETU]=0x%08x\n", gcid, phb_num, nest_base, nest_stack, pci_base, pci_stack, etu_base); /* Default BAR enables */ bar_en = 0; /* Initialize PHB register BAR */ phys_map_get(chip, PHB4_REG_SPC, phb_num, &phb_bar, NULL); xscom_write(gcid, nest_stack + XPEC_NEST_STK_PHB_REG_BAR, phb_bar << 8); bar_en |= XPEC_NEST_STK_BAR_EN_PHB; /* Same with INT BAR (ESB) */ phys_map_get(chip, PHB4_XIVE_ESB, phb_num, &irq_bar, NULL); xscom_write(gcid, nest_stack + XPEC_NEST_STK_IRQ_BAR, irq_bar << 8); bar_en |= XPEC_NEST_STK_BAR_EN_INT; /* Same with MMIO windows */ phys_map_get(chip, PHB4_64BIT_MMIO, phb_num, &mmio0_bar, &mmio0_sz); mmio0_bmask = (~(mmio0_sz - 1)) & 0x00FFFFFFFFFFFFFFULL; xscom_write(gcid, nest_stack + XPEC_NEST_STK_MMIO_BAR0, mmio0_bar << 8); xscom_write(gcid, nest_stack + XPEC_NEST_STK_MMIO_BAR0_MASK, mmio0_bmask << 8); phys_map_get(chip, PHB4_32BIT_MMIO, phb_num, &mmio1_bar, &mmio1_sz); mmio1_bmask = (~(mmio1_sz - 1)) & 0x00FFFFFFFFFFFFFFULL; xscom_write(gcid, nest_stack + XPEC_NEST_STK_MMIO_BAR1, mmio1_bar << 8); xscom_write(gcid, nest_stack + XPEC_NEST_STK_MMIO_BAR1_MASK, mmio1_bmask << 8); bar_en |= XPEC_NEST_STK_BAR_EN_MMIO0 | XPEC_NEST_STK_BAR_EN_MMIO1; prlog(PR_ERR, "PHB[%d:%d] PHB@0x%016llx IRQ@0x%016llx\n", gcid, phb_num, phb_bar, irq_bar); prlog(PR_ERR, "PHB[%d:%d] MMIO0@0x%016llx MMIO1@0x%016llx \n", gcid, phb_num, mmio0_bar, mmio1_bar); /* Build MMIO windows list */ mmio_win_sz = 0; if (mmio0_bar) { mmio_win[mmio_win_sz++] = mmio0_bar; mmio_win[mmio_win_sz++] = mmio0_sz; bar_en |= XPEC_NEST_STK_BAR_EN_MMIO0; } if (mmio1_bar) { mmio_win[mmio_win_sz++] = mmio1_bar; mmio_win[mmio_win_sz++] = mmio1_sz; bar_en |= XPEC_NEST_STK_BAR_EN_MMIO1; } /* Set the appropriate enables */ xscom_read(gcid, nest_stack + XPEC_NEST_STK_BAR_EN, &val); val |= bar_en; xscom_write(gcid, nest_stack + XPEC_NEST_STK_BAR_EN, val); /* No MMIO windows ? Barf ! */ if (mmio_win_sz == 0) { prerror("PHB[%d:%d] No MMIO windows enabled !\n", gcid, phb_num); return; } /* Check ETU reset */ xscom_read(gcid, pci_stack + XPEC_PCI_STK_ETU_RESET, &val); prlog_once(PR_ERR, "ETU reset: %llx\n", val); xscom_write(gcid, pci_stack + XPEC_PCI_STK_ETU_RESET, 0); time_wait_ms(1); // show we can read phb mmio space foo = (void *)(phb_bar + 0x800); // phb version register prlog_once(PR_ERR, "Version reg: 0x%016llx\n", in_be64(foo)); /* Create PHB node */ reg[0] = phb_bar; reg[1] = 0x1000; reg[2] = irq_bar; reg[3] = 0x10000000; np = dt_new_addr(dt_root, "pciex", reg[0]); if (!np) return; dt_add_property_strings(np, "compatible", "ibm,power9-pciex", "ibm,ioda3-phb"); dt_add_property_strings(np, "device_type", "pciex"); dt_add_property(np, "reg", reg, sizeof(reg)); /* Everything else is handled later by skiboot, we just * stick a few hints here */ dt_add_property_cells(np, "ibm,xscom-bases", nest_base, nest_stack, pci_base, pci_stack, etu_base); dt_add_property(np, "ibm,mmio-windows", mmio_win, 8 * mmio_win_sz); dt_add_property_cells(np, "ibm,phb-index", phb_num); dt_add_property_cells(np, "ibm,phb-stack", stk_node->phandle); dt_add_property_cells(np, "ibm,phb-stack-index", stk_index); dt_add_property_cells(np, "ibm,chip-id", gcid); if (dt_has_node_property(stk_node, "ibm,hub-id", NULL)) dt_add_property_cells(np, "ibm,hub-id", dt_prop_get_u32(stk_node, "ibm,hub-id")); if (dt_has_node_property(stk_node, "ibm,loc-code", NULL)) { const char *lc = dt_prop_get(stk_node, "ibm,loc-code"); dt_add_property_string(np, "ibm,loc-code", lc); } if (dt_has_node_property(stk_node, "ibm,lane-eq", NULL)) { size_t leq_size; const void *leq = dt_prop_get_def_size(stk_node, "ibm,lane-eq", NULL, &leq_size); if (leq != NULL && leq_size == 4 * 8) dt_add_property(np, "ibm,lane-eq", leq, leq_size); } if (dt_has_node_property(stk_node, "ibm,capp-ucode", NULL)) { capp_ucode_base = dt_prop_get_u32(stk_node, "ibm,capp-ucode"); dt_add_property_cells(np, "ibm,capp-ucode", capp_ucode_base); } if (dt_has_node_property(stk_node, "ibm,max-link-speed", NULL)) { max_link_speed = dt_prop_get_u32(stk_node, "ibm,max-link-speed"); dt_add_property_cells(np, "ibm,max-link-speed", max_link_speed); } dt_add_property_cells(np, "ibm,capi-flags", OPAL_PHB_CAPI_FLAG_SNOOP_CONTROL); add_chip_dev_associativity(np); } static void phb4_probe_pbcq(struct dt_node *pbcq) { uint32_t nest_base, pci_base, pec_index; struct dt_node *stk; nest_base = dt_get_address(pbcq, 0, NULL); pci_base = dt_get_address(pbcq, 1, NULL); pec_index = dt_prop_get_u32(pbcq, "ibm,pec-index"); dt_for_each_child(pbcq, stk) { if (dt_node_is_enabled(stk)) phb4_probe_stack(stk, pec_index, nest_base, pci_base); } } void phb4_preload_vpd(void) { const struct dt_property *prop; prop = dt_find_property(dt_root, "ibm,io-vpd"); if (!prop) { /* LX VPD Lid not already loaded */ vpd_preload(dt_root); } } void probe_phb4(void) { struct dt_node *np; /* Look for PBCQ XSCOM nodes */ dt_for_each_compatible(dt_root, np, "ibm,power9-pbcq") phb4_probe_pbcq(np); /* Look for newly created PHB nodes */ dt_for_each_compatible(dt_root, np, "ibm,power9-pciex") phb4_create(np); }