1184cd4a3SBenjamin Herrenschmidt /* 2184cd4a3SBenjamin Herrenschmidt * Support PCI/PCIe on PowerNV platforms 3184cd4a3SBenjamin Herrenschmidt * 4184cd4a3SBenjamin Herrenschmidt * Copyright 2011 Benjamin Herrenschmidt, IBM Corp. 5184cd4a3SBenjamin Herrenschmidt * 6184cd4a3SBenjamin Herrenschmidt * This program is free software; you can redistribute it and/or 7184cd4a3SBenjamin Herrenschmidt * modify it under the terms of the GNU General Public License 8184cd4a3SBenjamin Herrenschmidt * as published by the Free Software Foundation; either version 9184cd4a3SBenjamin Herrenschmidt * 2 of the License, or (at your option) any later version. 10184cd4a3SBenjamin Herrenschmidt */ 11184cd4a3SBenjamin Herrenschmidt 12cee72d5bSBenjamin Herrenschmidt #undef DEBUG 13184cd4a3SBenjamin Herrenschmidt 14184cd4a3SBenjamin Herrenschmidt #include <linux/kernel.h> 15184cd4a3SBenjamin Herrenschmidt #include <linux/pci.h> 16361f2a2aSGavin Shan #include <linux/crash_dump.h> 1737c367f2SGavin Shan #include <linux/debugfs.h> 18184cd4a3SBenjamin Herrenschmidt #include <linux/delay.h> 19184cd4a3SBenjamin Herrenschmidt #include <linux/string.h> 20184cd4a3SBenjamin Herrenschmidt #include <linux/init.h> 21184cd4a3SBenjamin Herrenschmidt #include <linux/bootmem.h> 22184cd4a3SBenjamin Herrenschmidt #include <linux/irq.h> 23184cd4a3SBenjamin Herrenschmidt #include <linux/io.h> 24184cd4a3SBenjamin Herrenschmidt #include <linux/msi.h> 25cd15b048SBenjamin Herrenschmidt #include <linux/memblock.h> 26ac9a5889SAlexey Kardashevskiy #include <linux/iommu.h> 27e57080f1SAlexey Kardashevskiy #include <linux/rculist.h> 284793d65dSAlexey Kardashevskiy #include <linux/sizes.h> 29184cd4a3SBenjamin Herrenschmidt 30184cd4a3SBenjamin Herrenschmidt #include <asm/sections.h> 31184cd4a3SBenjamin Herrenschmidt #include <asm/io.h> 32184cd4a3SBenjamin Herrenschmidt #include <asm/prom.h> 33184cd4a3SBenjamin Herrenschmidt #include <asm/pci-bridge.h> 34184cd4a3SBenjamin Herrenschmidt #include <asm/machdep.h> 35fb1b55d6SGavin Shan #include <asm/msi_bitmap.h> 36184cd4a3SBenjamin Herrenschmidt #include <asm/ppc-pci.h> 37184cd4a3SBenjamin Herrenschmidt #include <asm/opal.h> 38184cd4a3SBenjamin Herrenschmidt #include <asm/iommu.h> 39184cd4a3SBenjamin Herrenschmidt #include <asm/tce.h> 40137436c9SGavin Shan #include <asm/xics.h> 4137c367f2SGavin Shan #include <asm/debug.h> 42262af557SGuo Chao #include <asm/firmware.h> 4380c49c7eSIan Munsie #include <asm/pnv-pci.h> 44aca6913fSAlexey Kardashevskiy #include <asm/mmzone.h> 4580c49c7eSIan Munsie 46ec249dd8SMichael Neuling #include <misc/cxl-base.h> 47184cd4a3SBenjamin Herrenschmidt 48184cd4a3SBenjamin Herrenschmidt #include "powernv.h" 49184cd4a3SBenjamin Herrenschmidt #include "pci.h" 50184cd4a3SBenjamin Herrenschmidt 5199451551SGavin Shan #define PNV_IODA1_M64_NUM 16 /* Number of M64 BARs */ 5299451551SGavin Shan #define PNV_IODA1_M64_SEGS 8 /* Segments per M64 BAR */ 53acce971cSGavin Shan #define PNV_IODA1_DMA32_SEGSIZE 0x10000000 54781a868fSWei Yang 55bbb845c4SAlexey Kardashevskiy #define POWERNV_IOMMU_DEFAULT_LEVELS 1 56bbb845c4SAlexey Kardashevskiy #define POWERNV_IOMMU_MAX_LEVELS 5 57bbb845c4SAlexey Kardashevskiy 58aca6913fSAlexey Kardashevskiy static void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl); 59aca6913fSAlexey Kardashevskiy 607d623e42SAlexey Kardashevskiy void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level, 616d31c2faSJoe Perches const char *fmt, ...) 626d31c2faSJoe Perches { 636d31c2faSJoe Perches struct va_format vaf; 646d31c2faSJoe Perches va_list args; 656d31c2faSJoe Perches char pfix[32]; 66184cd4a3SBenjamin Herrenschmidt 676d31c2faSJoe Perches va_start(args, fmt); 686d31c2faSJoe Perches 696d31c2faSJoe Perches vaf.fmt = fmt; 706d31c2faSJoe Perches vaf.va = &args; 716d31c2faSJoe Perches 72781a868fSWei Yang if (pe->flags & PNV_IODA_PE_DEV) 736d31c2faSJoe Perches strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix)); 74781a868fSWei Yang else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) 756d31c2faSJoe Perches sprintf(pfix, "%04x:%02x ", 766d31c2faSJoe Perches pci_domain_nr(pe->pbus), pe->pbus->number); 77781a868fSWei Yang #ifdef CONFIG_PCI_IOV 78781a868fSWei Yang else if (pe->flags & PNV_IODA_PE_VF) 79781a868fSWei Yang sprintf(pfix, "%04x:%02x:%2x.%d", 80781a868fSWei Yang pci_domain_nr(pe->parent_dev->bus), 81781a868fSWei Yang (pe->rid & 0xff00) >> 8, 82781a868fSWei Yang PCI_SLOT(pe->rid), PCI_FUNC(pe->rid)); 83781a868fSWei Yang #endif /* CONFIG_PCI_IOV*/ 846d31c2faSJoe Perches 856d31c2faSJoe Perches printk("%spci %s: [PE# %.3d] %pV", 866d31c2faSJoe Perches level, pfix, pe->pe_number, &vaf); 876d31c2faSJoe Perches 886d31c2faSJoe Perches va_end(args); 896d31c2faSJoe Perches } 906d31c2faSJoe Perches 914e287840SThadeu Lima de Souza Cascardo static bool pnv_iommu_bypass_disabled __read_mostly; 924e287840SThadeu Lima de Souza Cascardo 934e287840SThadeu Lima de Souza Cascardo static int __init iommu_setup(char *str) 944e287840SThadeu Lima de Souza Cascardo { 954e287840SThadeu Lima de Souza Cascardo if (!str) 964e287840SThadeu Lima de Souza Cascardo return -EINVAL; 974e287840SThadeu Lima de Souza Cascardo 984e287840SThadeu Lima de Souza Cascardo while (*str) { 994e287840SThadeu Lima de Souza Cascardo if (!strncmp(str, "nobypass", 8)) { 1004e287840SThadeu Lima de Souza Cascardo pnv_iommu_bypass_disabled = true; 1014e287840SThadeu Lima de Souza Cascardo pr_info("PowerNV: IOMMU bypass window disabled.\n"); 1024e287840SThadeu Lima de Souza Cascardo break; 1034e287840SThadeu Lima de Souza Cascardo } 1044e287840SThadeu Lima de Souza Cascardo str += strcspn(str, ","); 1054e287840SThadeu Lima de Souza Cascardo if (*str == ',') 1064e287840SThadeu Lima de Souza Cascardo str++; 1074e287840SThadeu Lima de Souza Cascardo } 1084e287840SThadeu Lima de Souza Cascardo 1094e287840SThadeu Lima de Souza Cascardo return 0; 1104e287840SThadeu Lima de Souza Cascardo } 1114e287840SThadeu Lima de Souza Cascardo early_param("iommu", iommu_setup); 1124e287840SThadeu Lima de Souza Cascardo 113262af557SGuo Chao static inline bool pnv_pci_is_mem_pref_64(unsigned long flags) 114262af557SGuo Chao { 115262af557SGuo Chao return ((flags & (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)) == 116262af557SGuo Chao (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)); 117262af557SGuo Chao } 118262af557SGuo Chao 1191e916772SGavin Shan static struct pnv_ioda_pe *pnv_ioda_init_pe(struct pnv_phb *phb, int pe_no) 1201e916772SGavin Shan { 1211e916772SGavin Shan phb->ioda.pe_array[pe_no].phb = phb; 1221e916772SGavin Shan phb->ioda.pe_array[pe_no].pe_number = pe_no; 1231e916772SGavin Shan 1241e916772SGavin Shan return &phb->ioda.pe_array[pe_no]; 1251e916772SGavin Shan } 1261e916772SGavin Shan 1274b82ab18SGavin Shan static void pnv_ioda_reserve_pe(struct pnv_phb *phb, int pe_no) 1284b82ab18SGavin Shan { 12992b8f137SGavin Shan if (!(pe_no >= 0 && pe_no < phb->ioda.total_pe_num)) { 1304b82ab18SGavin Shan pr_warn("%s: Invalid PE %d on PHB#%x\n", 1314b82ab18SGavin Shan __func__, pe_no, phb->hose->global_number); 1324b82ab18SGavin Shan return; 1334b82ab18SGavin Shan } 1344b82ab18SGavin Shan 135e9dc4d7fSGavin Shan if (test_and_set_bit(pe_no, phb->ioda.pe_alloc)) 136e9dc4d7fSGavin Shan pr_debug("%s: PE %d was reserved on PHB#%x\n", 1374b82ab18SGavin Shan __func__, pe_no, phb->hose->global_number); 1384b82ab18SGavin Shan 1391e916772SGavin Shan pnv_ioda_init_pe(phb, pe_no); 1404b82ab18SGavin Shan } 1414b82ab18SGavin Shan 1421e916772SGavin Shan static struct pnv_ioda_pe *pnv_ioda_alloc_pe(struct pnv_phb *phb) 143184cd4a3SBenjamin Herrenschmidt { 144184cd4a3SBenjamin Herrenschmidt unsigned long pe; 145184cd4a3SBenjamin Herrenschmidt 146184cd4a3SBenjamin Herrenschmidt do { 147184cd4a3SBenjamin Herrenschmidt pe = find_next_zero_bit(phb->ioda.pe_alloc, 14892b8f137SGavin Shan phb->ioda.total_pe_num, 0); 14992b8f137SGavin Shan if (pe >= phb->ioda.total_pe_num) 1501e916772SGavin Shan return NULL; 151184cd4a3SBenjamin Herrenschmidt } while(test_and_set_bit(pe, phb->ioda.pe_alloc)); 152184cd4a3SBenjamin Herrenschmidt 1531e916772SGavin Shan return pnv_ioda_init_pe(phb, pe); 154184cd4a3SBenjamin Herrenschmidt } 155184cd4a3SBenjamin Herrenschmidt 1561e916772SGavin Shan static void pnv_ioda_free_pe(struct pnv_ioda_pe *pe) 157184cd4a3SBenjamin Herrenschmidt { 1581e916772SGavin Shan struct pnv_phb *phb = pe->phb; 159184cd4a3SBenjamin Herrenschmidt 1601e916772SGavin Shan WARN_ON(pe->pdev); 1611e916772SGavin Shan 1621e916772SGavin Shan memset(pe, 0, sizeof(struct pnv_ioda_pe)); 1631e916772SGavin Shan clear_bit(pe->pe_number, phb->ioda.pe_alloc); 164184cd4a3SBenjamin Herrenschmidt } 165184cd4a3SBenjamin Herrenschmidt 166262af557SGuo Chao /* The default M64 BAR is shared by all PEs */ 167262af557SGuo Chao static int pnv_ioda2_init_m64(struct pnv_phb *phb) 168262af557SGuo Chao { 169262af557SGuo Chao const char *desc; 170262af557SGuo Chao struct resource *r; 171262af557SGuo Chao s64 rc; 172262af557SGuo Chao 173262af557SGuo Chao /* Configure the default M64 BAR */ 174262af557SGuo Chao rc = opal_pci_set_phb_mem_window(phb->opal_id, 175262af557SGuo Chao OPAL_M64_WINDOW_TYPE, 176262af557SGuo Chao phb->ioda.m64_bar_idx, 177262af557SGuo Chao phb->ioda.m64_base, 178262af557SGuo Chao 0, /* unused */ 179262af557SGuo Chao phb->ioda.m64_size); 180262af557SGuo Chao if (rc != OPAL_SUCCESS) { 181262af557SGuo Chao desc = "configuring"; 182262af557SGuo Chao goto fail; 183262af557SGuo Chao } 184262af557SGuo Chao 185262af557SGuo Chao /* Enable the default M64 BAR */ 186262af557SGuo Chao rc = opal_pci_phb_mmio_enable(phb->opal_id, 187262af557SGuo Chao OPAL_M64_WINDOW_TYPE, 188262af557SGuo Chao phb->ioda.m64_bar_idx, 189262af557SGuo Chao OPAL_ENABLE_M64_SPLIT); 190262af557SGuo Chao if (rc != OPAL_SUCCESS) { 191262af557SGuo Chao desc = "enabling"; 192262af557SGuo Chao goto fail; 193262af557SGuo Chao } 194262af557SGuo Chao 195262af557SGuo Chao /* Mark the M64 BAR assigned */ 196262af557SGuo Chao set_bit(phb->ioda.m64_bar_idx, &phb->ioda.m64_bar_alloc); 197262af557SGuo Chao 198262af557SGuo Chao /* 199262af557SGuo Chao * Strip off the segment used by the reserved PE, which is 200262af557SGuo Chao * expected to be 0 or last one of PE capabicity. 201262af557SGuo Chao */ 202262af557SGuo Chao r = &phb->hose->mem_resources[1]; 20392b8f137SGavin Shan if (phb->ioda.reserved_pe_idx == 0) 204262af557SGuo Chao r->start += phb->ioda.m64_segsize; 20592b8f137SGavin Shan else if (phb->ioda.reserved_pe_idx == (phb->ioda.total_pe_num - 1)) 206262af557SGuo Chao r->end -= phb->ioda.m64_segsize; 207262af557SGuo Chao else 208262af557SGuo Chao pr_warn(" Cannot strip M64 segment for reserved PE#%d\n", 20992b8f137SGavin Shan phb->ioda.reserved_pe_idx); 210262af557SGuo Chao 211262af557SGuo Chao return 0; 212262af557SGuo Chao 213262af557SGuo Chao fail: 214262af557SGuo Chao pr_warn(" Failure %lld %s M64 BAR#%d\n", 215262af557SGuo Chao rc, desc, phb->ioda.m64_bar_idx); 216262af557SGuo Chao opal_pci_phb_mmio_enable(phb->opal_id, 217262af557SGuo Chao OPAL_M64_WINDOW_TYPE, 218262af557SGuo Chao phb->ioda.m64_bar_idx, 219262af557SGuo Chao OPAL_DISABLE_M64); 220262af557SGuo Chao return -EIO; 221262af557SGuo Chao } 222262af557SGuo Chao 223c430670aSGavin Shan static void pnv_ioda_reserve_dev_m64_pe(struct pci_dev *pdev, 22496a2f92bSGavin Shan unsigned long *pe_bitmap) 225262af557SGuo Chao { 22696a2f92bSGavin Shan struct pci_controller *hose = pci_bus_to_host(pdev->bus); 22796a2f92bSGavin Shan struct pnv_phb *phb = hose->private_data; 228262af557SGuo Chao struct resource *r; 22996a2f92bSGavin Shan resource_size_t base, sgsz, start, end; 23096a2f92bSGavin Shan int segno, i; 231262af557SGuo Chao 23296a2f92bSGavin Shan base = phb->ioda.m64_base; 23396a2f92bSGavin Shan sgsz = phb->ioda.m64_segsize; 23496a2f92bSGavin Shan for (i = 0; i <= PCI_ROM_RESOURCE; i++) { 23596a2f92bSGavin Shan r = &pdev->resource[i]; 23696a2f92bSGavin Shan if (!r->parent || !pnv_pci_is_mem_pref_64(r->flags)) 237262af557SGuo Chao continue; 238262af557SGuo Chao 23996a2f92bSGavin Shan start = _ALIGN_DOWN(r->start - base, sgsz); 24096a2f92bSGavin Shan end = _ALIGN_UP(r->end - base, sgsz); 24196a2f92bSGavin Shan for (segno = start / sgsz; segno < end / sgsz; segno++) { 24296a2f92bSGavin Shan if (pe_bitmap) 24396a2f92bSGavin Shan set_bit(segno, pe_bitmap); 24496a2f92bSGavin Shan else 24596a2f92bSGavin Shan pnv_ioda_reserve_pe(phb, segno); 246262af557SGuo Chao } 247262af557SGuo Chao } 248262af557SGuo Chao } 249262af557SGuo Chao 25099451551SGavin Shan static int pnv_ioda1_init_m64(struct pnv_phb *phb) 25199451551SGavin Shan { 25299451551SGavin Shan struct resource *r; 25399451551SGavin Shan int index; 25499451551SGavin Shan 25599451551SGavin Shan /* 25699451551SGavin Shan * There are 16 M64 BARs, each of which has 8 segments. So 25799451551SGavin Shan * there are as many M64 segments as the maximum number of 25899451551SGavin Shan * PEs, which is 128. 25999451551SGavin Shan */ 26099451551SGavin Shan for (index = 0; index < PNV_IODA1_M64_NUM; index++) { 26199451551SGavin Shan unsigned long base, segsz = phb->ioda.m64_segsize; 26299451551SGavin Shan int64_t rc; 26399451551SGavin Shan 26499451551SGavin Shan base = phb->ioda.m64_base + 26599451551SGavin Shan index * PNV_IODA1_M64_SEGS * segsz; 26699451551SGavin Shan rc = opal_pci_set_phb_mem_window(phb->opal_id, 26799451551SGavin Shan OPAL_M64_WINDOW_TYPE, index, base, 0, 26899451551SGavin Shan PNV_IODA1_M64_SEGS * segsz); 26999451551SGavin Shan if (rc != OPAL_SUCCESS) { 27099451551SGavin Shan pr_warn(" Error %lld setting M64 PHB#%d-BAR#%d\n", 27199451551SGavin Shan rc, phb->hose->global_number, index); 27299451551SGavin Shan goto fail; 27399451551SGavin Shan } 27499451551SGavin Shan 27599451551SGavin Shan rc = opal_pci_phb_mmio_enable(phb->opal_id, 27699451551SGavin Shan OPAL_M64_WINDOW_TYPE, index, 27799451551SGavin Shan OPAL_ENABLE_M64_SPLIT); 27899451551SGavin Shan if (rc != OPAL_SUCCESS) { 27999451551SGavin Shan pr_warn(" Error %lld enabling M64 PHB#%d-BAR#%d\n", 28099451551SGavin Shan rc, phb->hose->global_number, index); 28199451551SGavin Shan goto fail; 28299451551SGavin Shan } 28399451551SGavin Shan } 28499451551SGavin Shan 28599451551SGavin Shan /* 28699451551SGavin Shan * Exclude the segment used by the reserved PE, which 28799451551SGavin Shan * is expected to be 0 or last supported PE#. 28899451551SGavin Shan */ 28999451551SGavin Shan r = &phb->hose->mem_resources[1]; 29099451551SGavin Shan if (phb->ioda.reserved_pe_idx == 0) 29199451551SGavin Shan r->start += phb->ioda.m64_segsize; 29299451551SGavin Shan else if (phb->ioda.reserved_pe_idx == (phb->ioda.total_pe_num - 1)) 29399451551SGavin Shan r->end -= phb->ioda.m64_segsize; 29499451551SGavin Shan else 29599451551SGavin Shan WARN(1, "Wrong reserved PE#%d on PHB#%d\n", 29699451551SGavin Shan phb->ioda.reserved_pe_idx, phb->hose->global_number); 29799451551SGavin Shan 29899451551SGavin Shan return 0; 29999451551SGavin Shan 30099451551SGavin Shan fail: 30199451551SGavin Shan for ( ; index >= 0; index--) 30299451551SGavin Shan opal_pci_phb_mmio_enable(phb->opal_id, 30399451551SGavin Shan OPAL_M64_WINDOW_TYPE, index, OPAL_DISABLE_M64); 30499451551SGavin Shan 30599451551SGavin Shan return -EIO; 30699451551SGavin Shan } 30799451551SGavin Shan 308c430670aSGavin Shan static void pnv_ioda_reserve_m64_pe(struct pci_bus *bus, 30996a2f92bSGavin Shan unsigned long *pe_bitmap, 31096a2f92bSGavin Shan bool all) 311262af557SGuo Chao { 312262af557SGuo Chao struct pci_dev *pdev; 31396a2f92bSGavin Shan 31496a2f92bSGavin Shan list_for_each_entry(pdev, &bus->devices, bus_list) { 315c430670aSGavin Shan pnv_ioda_reserve_dev_m64_pe(pdev, pe_bitmap); 31696a2f92bSGavin Shan 31796a2f92bSGavin Shan if (all && pdev->subordinate) 318c430670aSGavin Shan pnv_ioda_reserve_m64_pe(pdev->subordinate, 31996a2f92bSGavin Shan pe_bitmap, all); 32096a2f92bSGavin Shan } 32196a2f92bSGavin Shan } 32296a2f92bSGavin Shan 3231e916772SGavin Shan static struct pnv_ioda_pe *pnv_ioda_pick_m64_pe(struct pci_bus *bus, bool all) 324262af557SGuo Chao { 32526ba248dSGavin Shan struct pci_controller *hose = pci_bus_to_host(bus); 32626ba248dSGavin Shan struct pnv_phb *phb = hose->private_data; 327262af557SGuo Chao struct pnv_ioda_pe *master_pe, *pe; 328262af557SGuo Chao unsigned long size, *pe_alloc; 32926ba248dSGavin Shan int i; 330262af557SGuo Chao 331262af557SGuo Chao /* Root bus shouldn't use M64 */ 332262af557SGuo Chao if (pci_is_root_bus(bus)) 3331e916772SGavin Shan return NULL; 334262af557SGuo Chao 335262af557SGuo Chao /* Allocate bitmap */ 33692b8f137SGavin Shan size = _ALIGN_UP(phb->ioda.total_pe_num / 8, sizeof(unsigned long)); 337262af557SGuo Chao pe_alloc = kzalloc(size, GFP_KERNEL); 338262af557SGuo Chao if (!pe_alloc) { 339262af557SGuo Chao pr_warn("%s: Out of memory !\n", 340262af557SGuo Chao __func__); 3411e916772SGavin Shan return NULL; 342262af557SGuo Chao } 343262af557SGuo Chao 34426ba248dSGavin Shan /* Figure out reserved PE numbers by the PE */ 345c430670aSGavin Shan pnv_ioda_reserve_m64_pe(bus, pe_alloc, all); 346262af557SGuo Chao 347262af557SGuo Chao /* 348262af557SGuo Chao * the current bus might not own M64 window and that's all 349262af557SGuo Chao * contributed by its child buses. For the case, we needn't 350262af557SGuo Chao * pick M64 dependent PE#. 351262af557SGuo Chao */ 35292b8f137SGavin Shan if (bitmap_empty(pe_alloc, phb->ioda.total_pe_num)) { 353262af557SGuo Chao kfree(pe_alloc); 3541e916772SGavin Shan return NULL; 355262af557SGuo Chao } 356262af557SGuo Chao 357262af557SGuo Chao /* 358262af557SGuo Chao * Figure out the master PE and put all slave PEs to master 359262af557SGuo Chao * PE's list to form compound PE. 360262af557SGuo Chao */ 361262af557SGuo Chao master_pe = NULL; 362262af557SGuo Chao i = -1; 36392b8f137SGavin Shan while ((i = find_next_bit(pe_alloc, phb->ioda.total_pe_num, i + 1)) < 36492b8f137SGavin Shan phb->ioda.total_pe_num) { 365262af557SGuo Chao pe = &phb->ioda.pe_array[i]; 366262af557SGuo Chao 36793289d8cSGavin Shan phb->ioda.m64_segmap[pe->pe_number] = pe->pe_number; 368262af557SGuo Chao if (!master_pe) { 369262af557SGuo Chao pe->flags |= PNV_IODA_PE_MASTER; 370262af557SGuo Chao INIT_LIST_HEAD(&pe->slaves); 371262af557SGuo Chao master_pe = pe; 372262af557SGuo Chao } else { 373262af557SGuo Chao pe->flags |= PNV_IODA_PE_SLAVE; 374262af557SGuo Chao pe->master = master_pe; 375262af557SGuo Chao list_add_tail(&pe->list, &master_pe->slaves); 376262af557SGuo Chao } 37799451551SGavin Shan 37899451551SGavin Shan /* 37999451551SGavin Shan * P7IOC supports M64DT, which helps mapping M64 segment 38099451551SGavin Shan * to one particular PE#. However, PHB3 has fixed mapping 38199451551SGavin Shan * between M64 segment and PE#. In order to have same logic 38299451551SGavin Shan * for P7IOC and PHB3, we enforce fixed mapping between M64 38399451551SGavin Shan * segment and PE# on P7IOC. 38499451551SGavin Shan */ 38599451551SGavin Shan if (phb->type == PNV_PHB_IODA1) { 38699451551SGavin Shan int64_t rc; 38799451551SGavin Shan 38899451551SGavin Shan rc = opal_pci_map_pe_mmio_window(phb->opal_id, 38999451551SGavin Shan pe->pe_number, OPAL_M64_WINDOW_TYPE, 39099451551SGavin Shan pe->pe_number / PNV_IODA1_M64_SEGS, 39199451551SGavin Shan pe->pe_number % PNV_IODA1_M64_SEGS); 39299451551SGavin Shan if (rc != OPAL_SUCCESS) 39399451551SGavin Shan pr_warn("%s: Error %lld mapping M64 for PHB#%d-PE#%d\n", 39499451551SGavin Shan __func__, rc, phb->hose->global_number, 39599451551SGavin Shan pe->pe_number); 39699451551SGavin Shan } 397262af557SGuo Chao } 398262af557SGuo Chao 399262af557SGuo Chao kfree(pe_alloc); 4001e916772SGavin Shan return master_pe; 401262af557SGuo Chao } 402262af557SGuo Chao 403262af557SGuo Chao static void __init pnv_ioda_parse_m64_window(struct pnv_phb *phb) 404262af557SGuo Chao { 405262af557SGuo Chao struct pci_controller *hose = phb->hose; 406262af557SGuo Chao struct device_node *dn = hose->dn; 407262af557SGuo Chao struct resource *res; 408262af557SGuo Chao const u32 *r; 409262af557SGuo Chao u64 pci_addr; 410262af557SGuo Chao 41199451551SGavin Shan if (phb->type != PNV_PHB_IODA1 && phb->type != PNV_PHB_IODA2) { 4121665c4a8SGavin Shan pr_info(" Not support M64 window\n"); 4131665c4a8SGavin Shan return; 4141665c4a8SGavin Shan } 4151665c4a8SGavin Shan 416e4d54f71SStewart Smith if (!firmware_has_feature(FW_FEATURE_OPAL)) { 417262af557SGuo Chao pr_info(" Firmware too old to support M64 window\n"); 418262af557SGuo Chao return; 419262af557SGuo Chao } 420262af557SGuo Chao 421262af557SGuo Chao r = of_get_property(dn, "ibm,opal-m64-window", NULL); 422262af557SGuo Chao if (!r) { 423262af557SGuo Chao pr_info(" No <ibm,opal-m64-window> on %s\n", 424262af557SGuo Chao dn->full_name); 425262af557SGuo Chao return; 426262af557SGuo Chao } 427262af557SGuo Chao 428262af557SGuo Chao res = &hose->mem_resources[1]; 429e80c4e7cSGavin Shan res->name = dn->full_name; 430262af557SGuo Chao res->start = of_translate_address(dn, r + 2); 431262af557SGuo Chao res->end = res->start + of_read_number(r + 4, 2) - 1; 432262af557SGuo Chao res->flags = (IORESOURCE_MEM | IORESOURCE_MEM_64 | IORESOURCE_PREFETCH); 433262af557SGuo Chao pci_addr = of_read_number(r, 2); 434262af557SGuo Chao hose->mem_offset[1] = res->start - pci_addr; 435262af557SGuo Chao 436262af557SGuo Chao phb->ioda.m64_size = resource_size(res); 43792b8f137SGavin Shan phb->ioda.m64_segsize = phb->ioda.m64_size / phb->ioda.total_pe_num; 438262af557SGuo Chao phb->ioda.m64_base = pci_addr; 439262af557SGuo Chao 440e9863e68SWei Yang pr_info(" MEM64 0x%016llx..0x%016llx -> 0x%016llx\n", 441e9863e68SWei Yang res->start, res->end, pci_addr); 442e9863e68SWei Yang 443262af557SGuo Chao /* Use last M64 BAR to cover M64 window */ 444262af557SGuo Chao phb->ioda.m64_bar_idx = 15; 44599451551SGavin Shan if (phb->type == PNV_PHB_IODA1) 44699451551SGavin Shan phb->init_m64 = pnv_ioda1_init_m64; 44799451551SGavin Shan else 448262af557SGuo Chao phb->init_m64 = pnv_ioda2_init_m64; 449c430670aSGavin Shan phb->reserve_m64_pe = pnv_ioda_reserve_m64_pe; 450c430670aSGavin Shan phb->pick_m64_pe = pnv_ioda_pick_m64_pe; 451262af557SGuo Chao } 452262af557SGuo Chao 45349dec922SGavin Shan static void pnv_ioda_freeze_pe(struct pnv_phb *phb, int pe_no) 45449dec922SGavin Shan { 45549dec922SGavin Shan struct pnv_ioda_pe *pe = &phb->ioda.pe_array[pe_no]; 45649dec922SGavin Shan struct pnv_ioda_pe *slave; 45749dec922SGavin Shan s64 rc; 45849dec922SGavin Shan 45949dec922SGavin Shan /* Fetch master PE */ 46049dec922SGavin Shan if (pe->flags & PNV_IODA_PE_SLAVE) { 46149dec922SGavin Shan pe = pe->master; 462ec8e4e9dSGavin Shan if (WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER))) 463ec8e4e9dSGavin Shan return; 464ec8e4e9dSGavin Shan 46549dec922SGavin Shan pe_no = pe->pe_number; 46649dec922SGavin Shan } 46749dec922SGavin Shan 46849dec922SGavin Shan /* Freeze master PE */ 46949dec922SGavin Shan rc = opal_pci_eeh_freeze_set(phb->opal_id, 47049dec922SGavin Shan pe_no, 47149dec922SGavin Shan OPAL_EEH_ACTION_SET_FREEZE_ALL); 47249dec922SGavin Shan if (rc != OPAL_SUCCESS) { 47349dec922SGavin Shan pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n", 47449dec922SGavin Shan __func__, rc, phb->hose->global_number, pe_no); 47549dec922SGavin Shan return; 47649dec922SGavin Shan } 47749dec922SGavin Shan 47849dec922SGavin Shan /* Freeze slave PEs */ 47949dec922SGavin Shan if (!(pe->flags & PNV_IODA_PE_MASTER)) 48049dec922SGavin Shan return; 48149dec922SGavin Shan 48249dec922SGavin Shan list_for_each_entry(slave, &pe->slaves, list) { 48349dec922SGavin Shan rc = opal_pci_eeh_freeze_set(phb->opal_id, 48449dec922SGavin Shan slave->pe_number, 48549dec922SGavin Shan OPAL_EEH_ACTION_SET_FREEZE_ALL); 48649dec922SGavin Shan if (rc != OPAL_SUCCESS) 48749dec922SGavin Shan pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n", 48849dec922SGavin Shan __func__, rc, phb->hose->global_number, 48949dec922SGavin Shan slave->pe_number); 49049dec922SGavin Shan } 49149dec922SGavin Shan } 49249dec922SGavin Shan 493e51df2c1SAnton Blanchard static int pnv_ioda_unfreeze_pe(struct pnv_phb *phb, int pe_no, int opt) 49449dec922SGavin Shan { 49549dec922SGavin Shan struct pnv_ioda_pe *pe, *slave; 49649dec922SGavin Shan s64 rc; 49749dec922SGavin Shan 49849dec922SGavin Shan /* Find master PE */ 49949dec922SGavin Shan pe = &phb->ioda.pe_array[pe_no]; 50049dec922SGavin Shan if (pe->flags & PNV_IODA_PE_SLAVE) { 50149dec922SGavin Shan pe = pe->master; 50249dec922SGavin Shan WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)); 50349dec922SGavin Shan pe_no = pe->pe_number; 50449dec922SGavin Shan } 50549dec922SGavin Shan 50649dec922SGavin Shan /* Clear frozen state for master PE */ 50749dec922SGavin Shan rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no, opt); 50849dec922SGavin Shan if (rc != OPAL_SUCCESS) { 50949dec922SGavin Shan pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n", 51049dec922SGavin Shan __func__, rc, opt, phb->hose->global_number, pe_no); 51149dec922SGavin Shan return -EIO; 51249dec922SGavin Shan } 51349dec922SGavin Shan 51449dec922SGavin Shan if (!(pe->flags & PNV_IODA_PE_MASTER)) 51549dec922SGavin Shan return 0; 51649dec922SGavin Shan 51749dec922SGavin Shan /* Clear frozen state for slave PEs */ 51849dec922SGavin Shan list_for_each_entry(slave, &pe->slaves, list) { 51949dec922SGavin Shan rc = opal_pci_eeh_freeze_clear(phb->opal_id, 52049dec922SGavin Shan slave->pe_number, 52149dec922SGavin Shan opt); 52249dec922SGavin Shan if (rc != OPAL_SUCCESS) { 52349dec922SGavin Shan pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n", 52449dec922SGavin Shan __func__, rc, opt, phb->hose->global_number, 52549dec922SGavin Shan slave->pe_number); 52649dec922SGavin Shan return -EIO; 52749dec922SGavin Shan } 52849dec922SGavin Shan } 52949dec922SGavin Shan 53049dec922SGavin Shan return 0; 53149dec922SGavin Shan } 53249dec922SGavin Shan 53349dec922SGavin Shan static int pnv_ioda_get_pe_state(struct pnv_phb *phb, int pe_no) 53449dec922SGavin Shan { 53549dec922SGavin Shan struct pnv_ioda_pe *slave, *pe; 53649dec922SGavin Shan u8 fstate, state; 53749dec922SGavin Shan __be16 pcierr; 53849dec922SGavin Shan s64 rc; 53949dec922SGavin Shan 54049dec922SGavin Shan /* Sanity check on PE number */ 54192b8f137SGavin Shan if (pe_no < 0 || pe_no >= phb->ioda.total_pe_num) 54249dec922SGavin Shan return OPAL_EEH_STOPPED_PERM_UNAVAIL; 54349dec922SGavin Shan 54449dec922SGavin Shan /* 54549dec922SGavin Shan * Fetch the master PE and the PE instance might be 54649dec922SGavin Shan * not initialized yet. 54749dec922SGavin Shan */ 54849dec922SGavin Shan pe = &phb->ioda.pe_array[pe_no]; 54949dec922SGavin Shan if (pe->flags & PNV_IODA_PE_SLAVE) { 55049dec922SGavin Shan pe = pe->master; 55149dec922SGavin Shan WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)); 55249dec922SGavin Shan pe_no = pe->pe_number; 55349dec922SGavin Shan } 55449dec922SGavin Shan 55549dec922SGavin Shan /* Check the master PE */ 55649dec922SGavin Shan rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no, 55749dec922SGavin Shan &state, &pcierr, NULL); 55849dec922SGavin Shan if (rc != OPAL_SUCCESS) { 55949dec922SGavin Shan pr_warn("%s: Failure %lld getting " 56049dec922SGavin Shan "PHB#%x-PE#%x state\n", 56149dec922SGavin Shan __func__, rc, 56249dec922SGavin Shan phb->hose->global_number, pe_no); 56349dec922SGavin Shan return OPAL_EEH_STOPPED_TEMP_UNAVAIL; 56449dec922SGavin Shan } 56549dec922SGavin Shan 56649dec922SGavin Shan /* Check the slave PE */ 56749dec922SGavin Shan if (!(pe->flags & PNV_IODA_PE_MASTER)) 56849dec922SGavin Shan return state; 56949dec922SGavin Shan 57049dec922SGavin Shan list_for_each_entry(slave, &pe->slaves, list) { 57149dec922SGavin Shan rc = opal_pci_eeh_freeze_status(phb->opal_id, 57249dec922SGavin Shan slave->pe_number, 57349dec922SGavin Shan &fstate, 57449dec922SGavin Shan &pcierr, 57549dec922SGavin Shan NULL); 57649dec922SGavin Shan if (rc != OPAL_SUCCESS) { 57749dec922SGavin Shan pr_warn("%s: Failure %lld getting " 57849dec922SGavin Shan "PHB#%x-PE#%x state\n", 57949dec922SGavin Shan __func__, rc, 58049dec922SGavin Shan phb->hose->global_number, slave->pe_number); 58149dec922SGavin Shan return OPAL_EEH_STOPPED_TEMP_UNAVAIL; 58249dec922SGavin Shan } 58349dec922SGavin Shan 58449dec922SGavin Shan /* 58549dec922SGavin Shan * Override the result based on the ascending 58649dec922SGavin Shan * priority. 58749dec922SGavin Shan */ 58849dec922SGavin Shan if (fstate > state) 58949dec922SGavin Shan state = fstate; 59049dec922SGavin Shan } 59149dec922SGavin Shan 59249dec922SGavin Shan return state; 59349dec922SGavin Shan } 59449dec922SGavin Shan 595184cd4a3SBenjamin Herrenschmidt /* Currently those 2 are only used when MSIs are enabled, this will change 596184cd4a3SBenjamin Herrenschmidt * but in the meantime, we need to protect them to avoid warnings 597184cd4a3SBenjamin Herrenschmidt */ 598184cd4a3SBenjamin Herrenschmidt #ifdef CONFIG_PCI_MSI 599cad5cef6SGreg Kroah-Hartman static struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev) 600184cd4a3SBenjamin Herrenschmidt { 601184cd4a3SBenjamin Herrenschmidt struct pci_controller *hose = pci_bus_to_host(dev->bus); 602184cd4a3SBenjamin Herrenschmidt struct pnv_phb *phb = hose->private_data; 603b72c1f65SBenjamin Herrenschmidt struct pci_dn *pdn = pci_get_pdn(dev); 604184cd4a3SBenjamin Herrenschmidt 605184cd4a3SBenjamin Herrenschmidt if (!pdn) 606184cd4a3SBenjamin Herrenschmidt return NULL; 607184cd4a3SBenjamin Herrenschmidt if (pdn->pe_number == IODA_INVALID_PE) 608184cd4a3SBenjamin Herrenschmidt return NULL; 609184cd4a3SBenjamin Herrenschmidt return &phb->ioda.pe_array[pdn->pe_number]; 610184cd4a3SBenjamin Herrenschmidt } 611184cd4a3SBenjamin Herrenschmidt #endif /* CONFIG_PCI_MSI */ 612184cd4a3SBenjamin Herrenschmidt 613b131a842SGavin Shan static int pnv_ioda_set_one_peltv(struct pnv_phb *phb, 614b131a842SGavin Shan struct pnv_ioda_pe *parent, 615b131a842SGavin Shan struct pnv_ioda_pe *child, 616b131a842SGavin Shan bool is_add) 617b131a842SGavin Shan { 618b131a842SGavin Shan const char *desc = is_add ? "adding" : "removing"; 619b131a842SGavin Shan uint8_t op = is_add ? OPAL_ADD_PE_TO_DOMAIN : 620b131a842SGavin Shan OPAL_REMOVE_PE_FROM_DOMAIN; 621b131a842SGavin Shan struct pnv_ioda_pe *slave; 622b131a842SGavin Shan long rc; 623b131a842SGavin Shan 624b131a842SGavin Shan /* Parent PE affects child PE */ 625b131a842SGavin Shan rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number, 626b131a842SGavin Shan child->pe_number, op); 627b131a842SGavin Shan if (rc != OPAL_SUCCESS) { 628b131a842SGavin Shan pe_warn(child, "OPAL error %ld %s to parent PELTV\n", 629b131a842SGavin Shan rc, desc); 630b131a842SGavin Shan return -ENXIO; 631b131a842SGavin Shan } 632b131a842SGavin Shan 633b131a842SGavin Shan if (!(child->flags & PNV_IODA_PE_MASTER)) 634b131a842SGavin Shan return 0; 635b131a842SGavin Shan 636b131a842SGavin Shan /* Compound case: parent PE affects slave PEs */ 637b131a842SGavin Shan list_for_each_entry(slave, &child->slaves, list) { 638b131a842SGavin Shan rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number, 639b131a842SGavin Shan slave->pe_number, op); 640b131a842SGavin Shan if (rc != OPAL_SUCCESS) { 641b131a842SGavin Shan pe_warn(slave, "OPAL error %ld %s to parent PELTV\n", 642b131a842SGavin Shan rc, desc); 643b131a842SGavin Shan return -ENXIO; 644b131a842SGavin Shan } 645b131a842SGavin Shan } 646b131a842SGavin Shan 647b131a842SGavin Shan return 0; 648b131a842SGavin Shan } 649b131a842SGavin Shan 650b131a842SGavin Shan static int pnv_ioda_set_peltv(struct pnv_phb *phb, 651b131a842SGavin Shan struct pnv_ioda_pe *pe, 652b131a842SGavin Shan bool is_add) 653b131a842SGavin Shan { 654b131a842SGavin Shan struct pnv_ioda_pe *slave; 655781a868fSWei Yang struct pci_dev *pdev = NULL; 656b131a842SGavin Shan int ret; 657b131a842SGavin Shan 658b131a842SGavin Shan /* 659b131a842SGavin Shan * Clear PE frozen state. If it's master PE, we need 660b131a842SGavin Shan * clear slave PE frozen state as well. 661b131a842SGavin Shan */ 662b131a842SGavin Shan if (is_add) { 663b131a842SGavin Shan opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, 664b131a842SGavin Shan OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); 665b131a842SGavin Shan if (pe->flags & PNV_IODA_PE_MASTER) { 666b131a842SGavin Shan list_for_each_entry(slave, &pe->slaves, list) 667b131a842SGavin Shan opal_pci_eeh_freeze_clear(phb->opal_id, 668b131a842SGavin Shan slave->pe_number, 669b131a842SGavin Shan OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); 670b131a842SGavin Shan } 671b131a842SGavin Shan } 672b131a842SGavin Shan 673b131a842SGavin Shan /* 674b131a842SGavin Shan * Associate PE in PELT. We need add the PE into the 675b131a842SGavin Shan * corresponding PELT-V as well. Otherwise, the error 676b131a842SGavin Shan * originated from the PE might contribute to other 677b131a842SGavin Shan * PEs. 678b131a842SGavin Shan */ 679b131a842SGavin Shan ret = pnv_ioda_set_one_peltv(phb, pe, pe, is_add); 680b131a842SGavin Shan if (ret) 681b131a842SGavin Shan return ret; 682b131a842SGavin Shan 683b131a842SGavin Shan /* For compound PEs, any one affects all of them */ 684b131a842SGavin Shan if (pe->flags & PNV_IODA_PE_MASTER) { 685b131a842SGavin Shan list_for_each_entry(slave, &pe->slaves, list) { 686b131a842SGavin Shan ret = pnv_ioda_set_one_peltv(phb, slave, pe, is_add); 687b131a842SGavin Shan if (ret) 688b131a842SGavin Shan return ret; 689b131a842SGavin Shan } 690b131a842SGavin Shan } 691b131a842SGavin Shan 692b131a842SGavin Shan if (pe->flags & (PNV_IODA_PE_BUS_ALL | PNV_IODA_PE_BUS)) 693b131a842SGavin Shan pdev = pe->pbus->self; 694781a868fSWei Yang else if (pe->flags & PNV_IODA_PE_DEV) 695b131a842SGavin Shan pdev = pe->pdev->bus->self; 696781a868fSWei Yang #ifdef CONFIG_PCI_IOV 697781a868fSWei Yang else if (pe->flags & PNV_IODA_PE_VF) 698283e2d8aSGavin Shan pdev = pe->parent_dev; 699781a868fSWei Yang #endif /* CONFIG_PCI_IOV */ 700b131a842SGavin Shan while (pdev) { 701b131a842SGavin Shan struct pci_dn *pdn = pci_get_pdn(pdev); 702b131a842SGavin Shan struct pnv_ioda_pe *parent; 703b131a842SGavin Shan 704b131a842SGavin Shan if (pdn && pdn->pe_number != IODA_INVALID_PE) { 705b131a842SGavin Shan parent = &phb->ioda.pe_array[pdn->pe_number]; 706b131a842SGavin Shan ret = pnv_ioda_set_one_peltv(phb, parent, pe, is_add); 707b131a842SGavin Shan if (ret) 708b131a842SGavin Shan return ret; 709b131a842SGavin Shan } 710b131a842SGavin Shan 711b131a842SGavin Shan pdev = pdev->bus->self; 712b131a842SGavin Shan } 713b131a842SGavin Shan 714b131a842SGavin Shan return 0; 715b131a842SGavin Shan } 716b131a842SGavin Shan 717781a868fSWei Yang #ifdef CONFIG_PCI_IOV 718781a868fSWei Yang static int pnv_ioda_deconfigure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) 719781a868fSWei Yang { 720781a868fSWei Yang struct pci_dev *parent; 721781a868fSWei Yang uint8_t bcomp, dcomp, fcomp; 722781a868fSWei Yang int64_t rc; 723781a868fSWei Yang long rid_end, rid; 724781a868fSWei Yang 725781a868fSWei Yang /* Currently, we just deconfigure VF PE. Bus PE will always there.*/ 726781a868fSWei Yang if (pe->pbus) { 727781a868fSWei Yang int count; 728781a868fSWei Yang 729781a868fSWei Yang dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; 730781a868fSWei Yang fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; 731781a868fSWei Yang parent = pe->pbus->self; 732781a868fSWei Yang if (pe->flags & PNV_IODA_PE_BUS_ALL) 733781a868fSWei Yang count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; 734781a868fSWei Yang else 735781a868fSWei Yang count = 1; 736781a868fSWei Yang 737781a868fSWei Yang switch(count) { 738781a868fSWei Yang case 1: bcomp = OpalPciBusAll; break; 739781a868fSWei Yang case 2: bcomp = OpalPciBus7Bits; break; 740781a868fSWei Yang case 4: bcomp = OpalPciBus6Bits; break; 741781a868fSWei Yang case 8: bcomp = OpalPciBus5Bits; break; 742781a868fSWei Yang case 16: bcomp = OpalPciBus4Bits; break; 743781a868fSWei Yang case 32: bcomp = OpalPciBus3Bits; break; 744781a868fSWei Yang default: 745781a868fSWei Yang dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n", 746781a868fSWei Yang count); 747781a868fSWei Yang /* Do an exact match only */ 748781a868fSWei Yang bcomp = OpalPciBusAll; 749781a868fSWei Yang } 750781a868fSWei Yang rid_end = pe->rid + (count << 8); 751781a868fSWei Yang } else { 752781a868fSWei Yang if (pe->flags & PNV_IODA_PE_VF) 753781a868fSWei Yang parent = pe->parent_dev; 754781a868fSWei Yang else 755781a868fSWei Yang parent = pe->pdev->bus->self; 756781a868fSWei Yang bcomp = OpalPciBusAll; 757781a868fSWei Yang dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; 758781a868fSWei Yang fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; 759781a868fSWei Yang rid_end = pe->rid + 1; 760781a868fSWei Yang } 761781a868fSWei Yang 762781a868fSWei Yang /* Clear the reverse map */ 763781a868fSWei Yang for (rid = pe->rid; rid < rid_end; rid++) 764781a868fSWei Yang phb->ioda.pe_rmap[rid] = 0; 765781a868fSWei Yang 766781a868fSWei Yang /* Release from all parents PELT-V */ 767781a868fSWei Yang while (parent) { 768781a868fSWei Yang struct pci_dn *pdn = pci_get_pdn(parent); 769781a868fSWei Yang if (pdn && pdn->pe_number != IODA_INVALID_PE) { 770781a868fSWei Yang rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number, 771781a868fSWei Yang pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN); 772781a868fSWei Yang /* XXX What to do in case of error ? */ 773781a868fSWei Yang } 774781a868fSWei Yang parent = parent->bus->self; 775781a868fSWei Yang } 776781a868fSWei Yang 777f951e510SGavin Shan opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, 778781a868fSWei Yang OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); 779781a868fSWei Yang 780781a868fSWei Yang /* Disassociate PE in PELT */ 781781a868fSWei Yang rc = opal_pci_set_peltv(phb->opal_id, pe->pe_number, 782781a868fSWei Yang pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN); 783781a868fSWei Yang if (rc) 784781a868fSWei Yang pe_warn(pe, "OPAL error %ld remove self from PELTV\n", rc); 785781a868fSWei Yang rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, 786781a868fSWei Yang bcomp, dcomp, fcomp, OPAL_UNMAP_PE); 787781a868fSWei Yang if (rc) 788781a868fSWei Yang pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); 789781a868fSWei Yang 790781a868fSWei Yang pe->pbus = NULL; 791781a868fSWei Yang pe->pdev = NULL; 792781a868fSWei Yang pe->parent_dev = NULL; 793781a868fSWei Yang 794781a868fSWei Yang return 0; 795781a868fSWei Yang } 796781a868fSWei Yang #endif /* CONFIG_PCI_IOV */ 797781a868fSWei Yang 798cad5cef6SGreg Kroah-Hartman static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) 799184cd4a3SBenjamin Herrenschmidt { 800184cd4a3SBenjamin Herrenschmidt struct pci_dev *parent; 801184cd4a3SBenjamin Herrenschmidt uint8_t bcomp, dcomp, fcomp; 802184cd4a3SBenjamin Herrenschmidt long rc, rid_end, rid; 803184cd4a3SBenjamin Herrenschmidt 804184cd4a3SBenjamin Herrenschmidt /* Bus validation ? */ 805184cd4a3SBenjamin Herrenschmidt if (pe->pbus) { 806184cd4a3SBenjamin Herrenschmidt int count; 807184cd4a3SBenjamin Herrenschmidt 808184cd4a3SBenjamin Herrenschmidt dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; 809184cd4a3SBenjamin Herrenschmidt fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; 810184cd4a3SBenjamin Herrenschmidt parent = pe->pbus->self; 811fb446ad0SGavin Shan if (pe->flags & PNV_IODA_PE_BUS_ALL) 812b918c62eSYinghai Lu count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; 813fb446ad0SGavin Shan else 814fb446ad0SGavin Shan count = 1; 815fb446ad0SGavin Shan 816184cd4a3SBenjamin Herrenschmidt switch(count) { 817184cd4a3SBenjamin Herrenschmidt case 1: bcomp = OpalPciBusAll; break; 818184cd4a3SBenjamin Herrenschmidt case 2: bcomp = OpalPciBus7Bits; break; 819184cd4a3SBenjamin Herrenschmidt case 4: bcomp = OpalPciBus6Bits; break; 820184cd4a3SBenjamin Herrenschmidt case 8: bcomp = OpalPciBus5Bits; break; 821184cd4a3SBenjamin Herrenschmidt case 16: bcomp = OpalPciBus4Bits; break; 822184cd4a3SBenjamin Herrenschmidt case 32: bcomp = OpalPciBus3Bits; break; 823184cd4a3SBenjamin Herrenschmidt default: 824781a868fSWei Yang dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n", 825781a868fSWei Yang count); 826184cd4a3SBenjamin Herrenschmidt /* Do an exact match only */ 827184cd4a3SBenjamin Herrenschmidt bcomp = OpalPciBusAll; 828184cd4a3SBenjamin Herrenschmidt } 829184cd4a3SBenjamin Herrenschmidt rid_end = pe->rid + (count << 8); 830184cd4a3SBenjamin Herrenschmidt } else { 831781a868fSWei Yang #ifdef CONFIG_PCI_IOV 832781a868fSWei Yang if (pe->flags & PNV_IODA_PE_VF) 833781a868fSWei Yang parent = pe->parent_dev; 834781a868fSWei Yang else 835781a868fSWei Yang #endif /* CONFIG_PCI_IOV */ 836184cd4a3SBenjamin Herrenschmidt parent = pe->pdev->bus->self; 837184cd4a3SBenjamin Herrenschmidt bcomp = OpalPciBusAll; 838184cd4a3SBenjamin Herrenschmidt dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; 839184cd4a3SBenjamin Herrenschmidt fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; 840184cd4a3SBenjamin Herrenschmidt rid_end = pe->rid + 1; 841184cd4a3SBenjamin Herrenschmidt } 842184cd4a3SBenjamin Herrenschmidt 843631ad691SGavin Shan /* 844631ad691SGavin Shan * Associate PE in PELT. We need add the PE into the 845631ad691SGavin Shan * corresponding PELT-V as well. Otherwise, the error 846631ad691SGavin Shan * originated from the PE might contribute to other 847631ad691SGavin Shan * PEs. 848631ad691SGavin Shan */ 849184cd4a3SBenjamin Herrenschmidt rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, 850184cd4a3SBenjamin Herrenschmidt bcomp, dcomp, fcomp, OPAL_MAP_PE); 851184cd4a3SBenjamin Herrenschmidt if (rc) { 852184cd4a3SBenjamin Herrenschmidt pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); 853184cd4a3SBenjamin Herrenschmidt return -ENXIO; 854184cd4a3SBenjamin Herrenschmidt } 855631ad691SGavin Shan 8565d2aa710SAlistair Popple /* 8575d2aa710SAlistair Popple * Configure PELTV. NPUs don't have a PELTV table so skip 8585d2aa710SAlistair Popple * configuration on them. 8595d2aa710SAlistair Popple */ 8605d2aa710SAlistair Popple if (phb->type != PNV_PHB_NPU) 861b131a842SGavin Shan pnv_ioda_set_peltv(phb, pe, true); 862184cd4a3SBenjamin Herrenschmidt 863184cd4a3SBenjamin Herrenschmidt /* Setup reverse map */ 864184cd4a3SBenjamin Herrenschmidt for (rid = pe->rid; rid < rid_end; rid++) 865184cd4a3SBenjamin Herrenschmidt phb->ioda.pe_rmap[rid] = pe->pe_number; 866184cd4a3SBenjamin Herrenschmidt 867184cd4a3SBenjamin Herrenschmidt /* Setup one MVTs on IODA1 */ 8684773f76bSGavin Shan if (phb->type != PNV_PHB_IODA1) { 8694773f76bSGavin Shan pe->mve_number = 0; 8704773f76bSGavin Shan goto out; 8714773f76bSGavin Shan } 8724773f76bSGavin Shan 873184cd4a3SBenjamin Herrenschmidt pe->mve_number = pe->pe_number; 8744773f76bSGavin Shan rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, pe->pe_number); 8754773f76bSGavin Shan if (rc != OPAL_SUCCESS) { 876184cd4a3SBenjamin Herrenschmidt pe_err(pe, "OPAL error %ld setting up MVE %d\n", 877184cd4a3SBenjamin Herrenschmidt rc, pe->mve_number); 878184cd4a3SBenjamin Herrenschmidt pe->mve_number = -1; 879184cd4a3SBenjamin Herrenschmidt } else { 880184cd4a3SBenjamin Herrenschmidt rc = opal_pci_set_mve_enable(phb->opal_id, 881cee72d5bSBenjamin Herrenschmidt pe->mve_number, OPAL_ENABLE_MVE); 882184cd4a3SBenjamin Herrenschmidt if (rc) { 883184cd4a3SBenjamin Herrenschmidt pe_err(pe, "OPAL error %ld enabling MVE %d\n", 884184cd4a3SBenjamin Herrenschmidt rc, pe->mve_number); 885184cd4a3SBenjamin Herrenschmidt pe->mve_number = -1; 886184cd4a3SBenjamin Herrenschmidt } 887184cd4a3SBenjamin Herrenschmidt } 888184cd4a3SBenjamin Herrenschmidt 8894773f76bSGavin Shan out: 890184cd4a3SBenjamin Herrenschmidt return 0; 891184cd4a3SBenjamin Herrenschmidt } 892184cd4a3SBenjamin Herrenschmidt 893781a868fSWei Yang #ifdef CONFIG_PCI_IOV 894781a868fSWei Yang static int pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset) 895781a868fSWei Yang { 896781a868fSWei Yang struct pci_dn *pdn = pci_get_pdn(dev); 897781a868fSWei Yang int i; 898781a868fSWei Yang struct resource *res, res2; 899781a868fSWei Yang resource_size_t size; 900781a868fSWei Yang u16 num_vfs; 901781a868fSWei Yang 902781a868fSWei Yang if (!dev->is_physfn) 903781a868fSWei Yang return -EINVAL; 904781a868fSWei Yang 905781a868fSWei Yang /* 906781a868fSWei Yang * "offset" is in VFs. The M64 windows are sized so that when they 907781a868fSWei Yang * are segmented, each segment is the same size as the IOV BAR. 908781a868fSWei Yang * Each segment is in a separate PE, and the high order bits of the 909781a868fSWei Yang * address are the PE number. Therefore, each VF's BAR is in a 910781a868fSWei Yang * separate PE, and changing the IOV BAR start address changes the 911781a868fSWei Yang * range of PEs the VFs are in. 912781a868fSWei Yang */ 913781a868fSWei Yang num_vfs = pdn->num_vfs; 914781a868fSWei Yang for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { 915781a868fSWei Yang res = &dev->resource[i + PCI_IOV_RESOURCES]; 916781a868fSWei Yang if (!res->flags || !res->parent) 917781a868fSWei Yang continue; 918781a868fSWei Yang 919781a868fSWei Yang /* 920781a868fSWei Yang * The actual IOV BAR range is determined by the start address 921781a868fSWei Yang * and the actual size for num_vfs VFs BAR. This check is to 922781a868fSWei Yang * make sure that after shifting, the range will not overlap 923781a868fSWei Yang * with another device. 924781a868fSWei Yang */ 925781a868fSWei Yang size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES); 926781a868fSWei Yang res2.flags = res->flags; 927781a868fSWei Yang res2.start = res->start + (size * offset); 928781a868fSWei Yang res2.end = res2.start + (size * num_vfs) - 1; 929781a868fSWei Yang 930781a868fSWei Yang if (res2.end > res->end) { 931781a868fSWei Yang dev_err(&dev->dev, "VF BAR%d: %pR would extend past %pR (trying to enable %d VFs shifted by %d)\n", 932781a868fSWei Yang i, &res2, res, num_vfs, offset); 933781a868fSWei Yang return -EBUSY; 934781a868fSWei Yang } 935781a868fSWei Yang } 936781a868fSWei Yang 937781a868fSWei Yang /* 938781a868fSWei Yang * After doing so, there would be a "hole" in the /proc/iomem when 939781a868fSWei Yang * offset is a positive value. It looks like the device return some 940781a868fSWei Yang * mmio back to the system, which actually no one could use it. 941781a868fSWei Yang */ 942781a868fSWei Yang for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { 943781a868fSWei Yang res = &dev->resource[i + PCI_IOV_RESOURCES]; 944781a868fSWei Yang if (!res->flags || !res->parent) 945781a868fSWei Yang continue; 946781a868fSWei Yang 947781a868fSWei Yang size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES); 948781a868fSWei Yang res2 = *res; 949781a868fSWei Yang res->start += size * offset; 950781a868fSWei Yang 95174703cc4SWei Yang dev_info(&dev->dev, "VF BAR%d: %pR shifted to %pR (%sabling %d VFs shifted by %d)\n", 95274703cc4SWei Yang i, &res2, res, (offset > 0) ? "En" : "Dis", 95374703cc4SWei Yang num_vfs, offset); 954781a868fSWei Yang pci_update_resource(dev, i + PCI_IOV_RESOURCES); 955781a868fSWei Yang } 956781a868fSWei Yang return 0; 957781a868fSWei Yang } 958781a868fSWei Yang #endif /* CONFIG_PCI_IOV */ 959781a868fSWei Yang 960cad5cef6SGreg Kroah-Hartman static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) 961184cd4a3SBenjamin Herrenschmidt { 962184cd4a3SBenjamin Herrenschmidt struct pci_controller *hose = pci_bus_to_host(dev->bus); 963184cd4a3SBenjamin Herrenschmidt struct pnv_phb *phb = hose->private_data; 964b72c1f65SBenjamin Herrenschmidt struct pci_dn *pdn = pci_get_pdn(dev); 965184cd4a3SBenjamin Herrenschmidt struct pnv_ioda_pe *pe; 966184cd4a3SBenjamin Herrenschmidt 967184cd4a3SBenjamin Herrenschmidt if (!pdn) { 968184cd4a3SBenjamin Herrenschmidt pr_err("%s: Device tree node not associated properly\n", 969184cd4a3SBenjamin Herrenschmidt pci_name(dev)); 970184cd4a3SBenjamin Herrenschmidt return NULL; 971184cd4a3SBenjamin Herrenschmidt } 972184cd4a3SBenjamin Herrenschmidt if (pdn->pe_number != IODA_INVALID_PE) 973184cd4a3SBenjamin Herrenschmidt return NULL; 974184cd4a3SBenjamin Herrenschmidt 9751e916772SGavin Shan pe = pnv_ioda_alloc_pe(phb); 9761e916772SGavin Shan if (!pe) { 977184cd4a3SBenjamin Herrenschmidt pr_warning("%s: Not enough PE# available, disabling device\n", 978184cd4a3SBenjamin Herrenschmidt pci_name(dev)); 979184cd4a3SBenjamin Herrenschmidt return NULL; 980184cd4a3SBenjamin Herrenschmidt } 981184cd4a3SBenjamin Herrenschmidt 982184cd4a3SBenjamin Herrenschmidt /* NOTE: We get only one ref to the pci_dev for the pdn, not for the 983184cd4a3SBenjamin Herrenschmidt * pointer in the PE data structure, both should be destroyed at the 984184cd4a3SBenjamin Herrenschmidt * same time. However, this needs to be looked at more closely again 985184cd4a3SBenjamin Herrenschmidt * once we actually start removing things (Hotplug, SR-IOV, ...) 986184cd4a3SBenjamin Herrenschmidt * 987184cd4a3SBenjamin Herrenschmidt * At some point we want to remove the PDN completely anyways 988184cd4a3SBenjamin Herrenschmidt */ 989184cd4a3SBenjamin Herrenschmidt pci_dev_get(dev); 990184cd4a3SBenjamin Herrenschmidt pdn->pcidev = dev; 9911e916772SGavin Shan pdn->pe_number = pe->pe_number; 9925d2aa710SAlistair Popple pe->flags = PNV_IODA_PE_DEV; 993184cd4a3SBenjamin Herrenschmidt pe->pdev = dev; 994184cd4a3SBenjamin Herrenschmidt pe->pbus = NULL; 995184cd4a3SBenjamin Herrenschmidt pe->mve_number = -1; 996184cd4a3SBenjamin Herrenschmidt pe->rid = dev->bus->number << 8 | pdn->devfn; 997184cd4a3SBenjamin Herrenschmidt 998184cd4a3SBenjamin Herrenschmidt pe_info(pe, "Associated device to PE\n"); 999184cd4a3SBenjamin Herrenschmidt 1000184cd4a3SBenjamin Herrenschmidt if (pnv_ioda_configure_pe(phb, pe)) { 1001184cd4a3SBenjamin Herrenschmidt /* XXX What do we do here ? */ 10021e916772SGavin Shan pnv_ioda_free_pe(pe); 1003184cd4a3SBenjamin Herrenschmidt pdn->pe_number = IODA_INVALID_PE; 1004184cd4a3SBenjamin Herrenschmidt pe->pdev = NULL; 1005184cd4a3SBenjamin Herrenschmidt pci_dev_put(dev); 1006184cd4a3SBenjamin Herrenschmidt return NULL; 1007184cd4a3SBenjamin Herrenschmidt } 1008184cd4a3SBenjamin Herrenschmidt 1009184cd4a3SBenjamin Herrenschmidt return pe; 1010184cd4a3SBenjamin Herrenschmidt } 1011184cd4a3SBenjamin Herrenschmidt 1012184cd4a3SBenjamin Herrenschmidt static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) 1013184cd4a3SBenjamin Herrenschmidt { 1014184cd4a3SBenjamin Herrenschmidt struct pci_dev *dev; 1015184cd4a3SBenjamin Herrenschmidt 1016184cd4a3SBenjamin Herrenschmidt list_for_each_entry(dev, &bus->devices, bus_list) { 1017b72c1f65SBenjamin Herrenschmidt struct pci_dn *pdn = pci_get_pdn(dev); 1018184cd4a3SBenjamin Herrenschmidt 1019184cd4a3SBenjamin Herrenschmidt if (pdn == NULL) { 1020184cd4a3SBenjamin Herrenschmidt pr_warn("%s: No device node associated with device !\n", 1021184cd4a3SBenjamin Herrenschmidt pci_name(dev)); 1022184cd4a3SBenjamin Herrenschmidt continue; 1023184cd4a3SBenjamin Herrenschmidt } 102494973b24SAlistair Popple pdn->pcidev = dev; 1025184cd4a3SBenjamin Herrenschmidt pdn->pe_number = pe->pe_number; 1026fb446ad0SGavin Shan if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) 1027184cd4a3SBenjamin Herrenschmidt pnv_ioda_setup_same_PE(dev->subordinate, pe); 1028184cd4a3SBenjamin Herrenschmidt } 1029184cd4a3SBenjamin Herrenschmidt } 1030184cd4a3SBenjamin Herrenschmidt 1031fb446ad0SGavin Shan /* 1032fb446ad0SGavin Shan * There're 2 types of PCI bus sensitive PEs: One that is compromised of 1033fb446ad0SGavin Shan * single PCI bus. Another one that contains the primary PCI bus and its 1034fb446ad0SGavin Shan * subordinate PCI devices and buses. The second type of PE is normally 1035fb446ad0SGavin Shan * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports. 1036fb446ad0SGavin Shan */ 10371e916772SGavin Shan static struct pnv_ioda_pe *pnv_ioda_setup_bus_PE(struct pci_bus *bus, bool all) 1038184cd4a3SBenjamin Herrenschmidt { 1039fb446ad0SGavin Shan struct pci_controller *hose = pci_bus_to_host(bus); 1040184cd4a3SBenjamin Herrenschmidt struct pnv_phb *phb = hose->private_data; 10411e916772SGavin Shan struct pnv_ioda_pe *pe = NULL; 1042184cd4a3SBenjamin Herrenschmidt 1043262af557SGuo Chao /* Check if PE is determined by M64 */ 1044262af557SGuo Chao if (phb->pick_m64_pe) 10451e916772SGavin Shan pe = phb->pick_m64_pe(bus, all); 1046262af557SGuo Chao 1047262af557SGuo Chao /* The PE number isn't pinned by M64 */ 10481e916772SGavin Shan if (!pe) 10491e916772SGavin Shan pe = pnv_ioda_alloc_pe(phb); 1050262af557SGuo Chao 10511e916772SGavin Shan if (!pe) { 1052fb446ad0SGavin Shan pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n", 1053fb446ad0SGavin Shan __func__, pci_domain_nr(bus), bus->number); 10541e916772SGavin Shan return NULL; 1055184cd4a3SBenjamin Herrenschmidt } 1056184cd4a3SBenjamin Herrenschmidt 1057262af557SGuo Chao pe->flags |= (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS); 1058184cd4a3SBenjamin Herrenschmidt pe->pbus = bus; 1059184cd4a3SBenjamin Herrenschmidt pe->pdev = NULL; 1060184cd4a3SBenjamin Herrenschmidt pe->mve_number = -1; 1061b918c62eSYinghai Lu pe->rid = bus->busn_res.start << 8; 1062184cd4a3SBenjamin Herrenschmidt 1063fb446ad0SGavin Shan if (all) 1064fb446ad0SGavin Shan pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n", 10651e916772SGavin Shan bus->busn_res.start, bus->busn_res.end, pe->pe_number); 1066fb446ad0SGavin Shan else 1067fb446ad0SGavin Shan pe_info(pe, "Secondary bus %d associated with PE#%d\n", 10681e916772SGavin Shan bus->busn_res.start, pe->pe_number); 1069184cd4a3SBenjamin Herrenschmidt 1070184cd4a3SBenjamin Herrenschmidt if (pnv_ioda_configure_pe(phb, pe)) { 1071184cd4a3SBenjamin Herrenschmidt /* XXX What do we do here ? */ 10721e916772SGavin Shan pnv_ioda_free_pe(pe); 1073184cd4a3SBenjamin Herrenschmidt pe->pbus = NULL; 10741e916772SGavin Shan return NULL; 1075184cd4a3SBenjamin Herrenschmidt } 1076184cd4a3SBenjamin Herrenschmidt 1077184cd4a3SBenjamin Herrenschmidt /* Associate it with all child devices */ 1078184cd4a3SBenjamin Herrenschmidt pnv_ioda_setup_same_PE(bus, pe); 1079184cd4a3SBenjamin Herrenschmidt 10807ebdf956SGavin Shan /* Put PE to the list */ 10817ebdf956SGavin Shan list_add_tail(&pe->list, &phb->ioda.pe_list); 10821e916772SGavin Shan 10831e916772SGavin Shan return pe; 1084184cd4a3SBenjamin Herrenschmidt } 1085184cd4a3SBenjamin Herrenschmidt 1086b521549aSAlistair Popple static struct pnv_ioda_pe *pnv_ioda_setup_npu_PE(struct pci_dev *npu_pdev) 10875d2aa710SAlistair Popple { 1088b521549aSAlistair Popple int pe_num, found_pe = false, rc; 1089b521549aSAlistair Popple long rid; 1090b521549aSAlistair Popple struct pnv_ioda_pe *pe; 1091b521549aSAlistair Popple struct pci_dev *gpu_pdev; 1092b521549aSAlistair Popple struct pci_dn *npu_pdn; 1093b521549aSAlistair Popple struct pci_controller *hose = pci_bus_to_host(npu_pdev->bus); 1094b521549aSAlistair Popple struct pnv_phb *phb = hose->private_data; 1095b521549aSAlistair Popple 1096b521549aSAlistair Popple /* 1097b521549aSAlistair Popple * Due to a hardware errata PE#0 on the NPU is reserved for 1098b521549aSAlistair Popple * error handling. This means we only have three PEs remaining 1099b521549aSAlistair Popple * which need to be assigned to four links, implying some 1100b521549aSAlistair Popple * links must share PEs. 1101b521549aSAlistair Popple * 1102b521549aSAlistair Popple * To achieve this we assign PEs such that NPUs linking the 1103b521549aSAlistair Popple * same GPU get assigned the same PE. 1104b521549aSAlistair Popple */ 1105b521549aSAlistair Popple gpu_pdev = pnv_pci_get_gpu_dev(npu_pdev); 110692b8f137SGavin Shan for (pe_num = 0; pe_num < phb->ioda.total_pe_num; pe_num++) { 1107b521549aSAlistair Popple pe = &phb->ioda.pe_array[pe_num]; 1108b521549aSAlistair Popple if (!pe->pdev) 1109b521549aSAlistair Popple continue; 1110b521549aSAlistair Popple 1111b521549aSAlistair Popple if (pnv_pci_get_gpu_dev(pe->pdev) == gpu_pdev) { 1112b521549aSAlistair Popple /* 1113b521549aSAlistair Popple * This device has the same peer GPU so should 1114b521549aSAlistair Popple * be assigned the same PE as the existing 1115b521549aSAlistair Popple * peer NPU. 1116b521549aSAlistair Popple */ 1117b521549aSAlistair Popple dev_info(&npu_pdev->dev, 1118b521549aSAlistair Popple "Associating to existing PE %d\n", pe_num); 1119b521549aSAlistair Popple pci_dev_get(npu_pdev); 1120b521549aSAlistair Popple npu_pdn = pci_get_pdn(npu_pdev); 1121b521549aSAlistair Popple rid = npu_pdev->bus->number << 8 | npu_pdn->devfn; 1122b521549aSAlistair Popple npu_pdn->pcidev = npu_pdev; 1123b521549aSAlistair Popple npu_pdn->pe_number = pe_num; 1124b521549aSAlistair Popple phb->ioda.pe_rmap[rid] = pe->pe_number; 1125b521549aSAlistair Popple 1126b521549aSAlistair Popple /* Map the PE to this link */ 1127b521549aSAlistair Popple rc = opal_pci_set_pe(phb->opal_id, pe_num, rid, 1128b521549aSAlistair Popple OpalPciBusAll, 1129b521549aSAlistair Popple OPAL_COMPARE_RID_DEVICE_NUMBER, 1130b521549aSAlistair Popple OPAL_COMPARE_RID_FUNCTION_NUMBER, 1131b521549aSAlistair Popple OPAL_MAP_PE); 1132b521549aSAlistair Popple WARN_ON(rc != OPAL_SUCCESS); 1133b521549aSAlistair Popple found_pe = true; 1134b521549aSAlistair Popple break; 1135b521549aSAlistair Popple } 1136b521549aSAlistair Popple } 1137b521549aSAlistair Popple 1138b521549aSAlistair Popple if (!found_pe) 1139b521549aSAlistair Popple /* 1140b521549aSAlistair Popple * Could not find an existing PE so allocate a new 1141b521549aSAlistair Popple * one. 1142b521549aSAlistair Popple */ 1143b521549aSAlistair Popple return pnv_ioda_setup_dev_PE(npu_pdev); 1144b521549aSAlistair Popple else 1145b521549aSAlistair Popple return pe; 1146b521549aSAlistair Popple } 1147b521549aSAlistair Popple 1148b521549aSAlistair Popple static void pnv_ioda_setup_npu_PEs(struct pci_bus *bus) 1149b521549aSAlistair Popple { 11505d2aa710SAlistair Popple struct pci_dev *pdev; 11515d2aa710SAlistair Popple 11525d2aa710SAlistair Popple list_for_each_entry(pdev, &bus->devices, bus_list) 1153b521549aSAlistair Popple pnv_ioda_setup_npu_PE(pdev); 11545d2aa710SAlistair Popple } 11555d2aa710SAlistair Popple 1156cad5cef6SGreg Kroah-Hartman static void pnv_ioda_setup_PEs(struct pci_bus *bus) 1157184cd4a3SBenjamin Herrenschmidt { 1158184cd4a3SBenjamin Herrenschmidt struct pci_dev *dev; 1159fb446ad0SGavin Shan 1160d1203852SGavin Shan pnv_ioda_setup_bus_PE(bus, false); 1161184cd4a3SBenjamin Herrenschmidt 1162184cd4a3SBenjamin Herrenschmidt list_for_each_entry(dev, &bus->devices, bus_list) { 1163fb446ad0SGavin Shan if (dev->subordinate) { 116462f87c0eSYijing Wang if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) 1165d1203852SGavin Shan pnv_ioda_setup_bus_PE(dev->subordinate, true); 1166fb446ad0SGavin Shan else 1167184cd4a3SBenjamin Herrenschmidt pnv_ioda_setup_PEs(dev->subordinate); 1168184cd4a3SBenjamin Herrenschmidt } 1169184cd4a3SBenjamin Herrenschmidt } 1170fb446ad0SGavin Shan } 1171fb446ad0SGavin Shan 1172fb446ad0SGavin Shan /* 1173fb446ad0SGavin Shan * Configure PEs so that the downstream PCI buses and devices 1174fb446ad0SGavin Shan * could have their associated PE#. Unfortunately, we didn't 1175fb446ad0SGavin Shan * figure out the way to identify the PLX bridge yet. So we 1176fb446ad0SGavin Shan * simply put the PCI bus and the subordinate behind the root 1177fb446ad0SGavin Shan * port to PE# here. The game rule here is expected to be changed 1178fb446ad0SGavin Shan * as soon as we can detected PLX bridge correctly. 1179fb446ad0SGavin Shan */ 1180cad5cef6SGreg Kroah-Hartman static void pnv_pci_ioda_setup_PEs(void) 1181fb446ad0SGavin Shan { 1182fb446ad0SGavin Shan struct pci_controller *hose, *tmp; 1183262af557SGuo Chao struct pnv_phb *phb; 1184fb446ad0SGavin Shan 1185fb446ad0SGavin Shan list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { 1186262af557SGuo Chao phb = hose->private_data; 1187262af557SGuo Chao 1188262af557SGuo Chao /* M64 layout might affect PE allocation */ 11895ef73567SGavin Shan if (phb->reserve_m64_pe) 119096a2f92bSGavin Shan phb->reserve_m64_pe(hose->bus, NULL, true); 1191262af557SGuo Chao 11925d2aa710SAlistair Popple /* 11935d2aa710SAlistair Popple * On NPU PHB, we expect separate PEs for individual PCI 11945d2aa710SAlistair Popple * functions. PCI bus dependent PEs are required for the 11955d2aa710SAlistair Popple * remaining types of PHBs. 11965d2aa710SAlistair Popple */ 119708f48f32SAlistair Popple if (phb->type == PNV_PHB_NPU) { 119808f48f32SAlistair Popple /* PE#0 is needed for error reporting */ 119908f48f32SAlistair Popple pnv_ioda_reserve_pe(phb, 0); 1200b521549aSAlistair Popple pnv_ioda_setup_npu_PEs(hose->bus); 120108f48f32SAlistair Popple } else 1202fb446ad0SGavin Shan pnv_ioda_setup_PEs(hose->bus); 1203fb446ad0SGavin Shan } 1204fb446ad0SGavin Shan } 1205184cd4a3SBenjamin Herrenschmidt 1206a8b2f828SGavin Shan #ifdef CONFIG_PCI_IOV 1207ee8222feSWei Yang static int pnv_pci_vf_release_m64(struct pci_dev *pdev, u16 num_vfs) 1208781a868fSWei Yang { 1209781a868fSWei Yang struct pci_bus *bus; 1210781a868fSWei Yang struct pci_controller *hose; 1211781a868fSWei Yang struct pnv_phb *phb; 1212781a868fSWei Yang struct pci_dn *pdn; 121302639b0eSWei Yang int i, j; 1214ee8222feSWei Yang int m64_bars; 1215781a868fSWei Yang 1216781a868fSWei Yang bus = pdev->bus; 1217781a868fSWei Yang hose = pci_bus_to_host(bus); 1218781a868fSWei Yang phb = hose->private_data; 1219781a868fSWei Yang pdn = pci_get_pdn(pdev); 1220781a868fSWei Yang 1221ee8222feSWei Yang if (pdn->m64_single_mode) 1222ee8222feSWei Yang m64_bars = num_vfs; 1223ee8222feSWei Yang else 1224ee8222feSWei Yang m64_bars = 1; 1225ee8222feSWei Yang 122602639b0eSWei Yang for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) 1227ee8222feSWei Yang for (j = 0; j < m64_bars; j++) { 1228ee8222feSWei Yang if (pdn->m64_map[j][i] == IODA_INVALID_M64) 1229781a868fSWei Yang continue; 1230781a868fSWei Yang opal_pci_phb_mmio_enable(phb->opal_id, 1231ee8222feSWei Yang OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 0); 1232ee8222feSWei Yang clear_bit(pdn->m64_map[j][i], &phb->ioda.m64_bar_alloc); 1233ee8222feSWei Yang pdn->m64_map[j][i] = IODA_INVALID_M64; 1234781a868fSWei Yang } 1235781a868fSWei Yang 1236ee8222feSWei Yang kfree(pdn->m64_map); 1237781a868fSWei Yang return 0; 1238781a868fSWei Yang } 1239781a868fSWei Yang 124002639b0eSWei Yang static int pnv_pci_vf_assign_m64(struct pci_dev *pdev, u16 num_vfs) 1241781a868fSWei Yang { 1242781a868fSWei Yang struct pci_bus *bus; 1243781a868fSWei Yang struct pci_controller *hose; 1244781a868fSWei Yang struct pnv_phb *phb; 1245781a868fSWei Yang struct pci_dn *pdn; 1246781a868fSWei Yang unsigned int win; 1247781a868fSWei Yang struct resource *res; 124802639b0eSWei Yang int i, j; 1249781a868fSWei Yang int64_t rc; 125002639b0eSWei Yang int total_vfs; 125102639b0eSWei Yang resource_size_t size, start; 125202639b0eSWei Yang int pe_num; 1253ee8222feSWei Yang int m64_bars; 1254781a868fSWei Yang 1255781a868fSWei Yang bus = pdev->bus; 1256781a868fSWei Yang hose = pci_bus_to_host(bus); 1257781a868fSWei Yang phb = hose->private_data; 1258781a868fSWei Yang pdn = pci_get_pdn(pdev); 125902639b0eSWei Yang total_vfs = pci_sriov_get_totalvfs(pdev); 1260781a868fSWei Yang 1261ee8222feSWei Yang if (pdn->m64_single_mode) 1262ee8222feSWei Yang m64_bars = num_vfs; 1263ee8222feSWei Yang else 1264ee8222feSWei Yang m64_bars = 1; 126502639b0eSWei Yang 1266ee8222feSWei Yang pdn->m64_map = kmalloc(sizeof(*pdn->m64_map) * m64_bars, GFP_KERNEL); 1267ee8222feSWei Yang if (!pdn->m64_map) 1268ee8222feSWei Yang return -ENOMEM; 1269ee8222feSWei Yang /* Initialize the m64_map to IODA_INVALID_M64 */ 1270ee8222feSWei Yang for (i = 0; i < m64_bars ; i++) 1271ee8222feSWei Yang for (j = 0; j < PCI_SRIOV_NUM_BARS; j++) 1272ee8222feSWei Yang pdn->m64_map[i][j] = IODA_INVALID_M64; 1273ee8222feSWei Yang 1274781a868fSWei Yang 1275781a868fSWei Yang for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { 1276781a868fSWei Yang res = &pdev->resource[i + PCI_IOV_RESOURCES]; 1277781a868fSWei Yang if (!res->flags || !res->parent) 1278781a868fSWei Yang continue; 1279781a868fSWei Yang 1280ee8222feSWei Yang for (j = 0; j < m64_bars; j++) { 1281781a868fSWei Yang do { 1282781a868fSWei Yang win = find_next_zero_bit(&phb->ioda.m64_bar_alloc, 1283781a868fSWei Yang phb->ioda.m64_bar_idx + 1, 0); 1284781a868fSWei Yang 1285781a868fSWei Yang if (win >= phb->ioda.m64_bar_idx + 1) 1286781a868fSWei Yang goto m64_failed; 1287781a868fSWei Yang } while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc)); 1288781a868fSWei Yang 1289ee8222feSWei Yang pdn->m64_map[j][i] = win; 129002639b0eSWei Yang 1291ee8222feSWei Yang if (pdn->m64_single_mode) { 129202639b0eSWei Yang size = pci_iov_resource_size(pdev, 129302639b0eSWei Yang PCI_IOV_RESOURCES + i); 129402639b0eSWei Yang start = res->start + size * j; 129502639b0eSWei Yang } else { 129602639b0eSWei Yang size = resource_size(res); 129702639b0eSWei Yang start = res->start; 129802639b0eSWei Yang } 1299781a868fSWei Yang 1300781a868fSWei Yang /* Map the M64 here */ 1301ee8222feSWei Yang if (pdn->m64_single_mode) { 1302be283eebSWei Yang pe_num = pdn->pe_num_map[j]; 130302639b0eSWei Yang rc = opal_pci_map_pe_mmio_window(phb->opal_id, 130402639b0eSWei Yang pe_num, OPAL_M64_WINDOW_TYPE, 1305ee8222feSWei Yang pdn->m64_map[j][i], 0); 130602639b0eSWei Yang } 130702639b0eSWei Yang 1308781a868fSWei Yang rc = opal_pci_set_phb_mem_window(phb->opal_id, 1309781a868fSWei Yang OPAL_M64_WINDOW_TYPE, 1310ee8222feSWei Yang pdn->m64_map[j][i], 131102639b0eSWei Yang start, 1312781a868fSWei Yang 0, /* unused */ 131302639b0eSWei Yang size); 131402639b0eSWei Yang 131502639b0eSWei Yang 1316781a868fSWei Yang if (rc != OPAL_SUCCESS) { 1317781a868fSWei Yang dev_err(&pdev->dev, "Failed to map M64 window #%d: %lld\n", 1318781a868fSWei Yang win, rc); 1319781a868fSWei Yang goto m64_failed; 1320781a868fSWei Yang } 1321781a868fSWei Yang 1322ee8222feSWei Yang if (pdn->m64_single_mode) 1323781a868fSWei Yang rc = opal_pci_phb_mmio_enable(phb->opal_id, 1324ee8222feSWei Yang OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 2); 132502639b0eSWei Yang else 132602639b0eSWei Yang rc = opal_pci_phb_mmio_enable(phb->opal_id, 1327ee8222feSWei Yang OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 1); 132802639b0eSWei Yang 1329781a868fSWei Yang if (rc != OPAL_SUCCESS) { 1330781a868fSWei Yang dev_err(&pdev->dev, "Failed to enable M64 window #%d: %llx\n", 1331781a868fSWei Yang win, rc); 1332781a868fSWei Yang goto m64_failed; 1333781a868fSWei Yang } 1334781a868fSWei Yang } 133502639b0eSWei Yang } 1336781a868fSWei Yang return 0; 1337781a868fSWei Yang 1338781a868fSWei Yang m64_failed: 1339ee8222feSWei Yang pnv_pci_vf_release_m64(pdev, num_vfs); 1340781a868fSWei Yang return -EBUSY; 1341781a868fSWei Yang } 1342781a868fSWei Yang 1343c035e37bSAlexey Kardashevskiy static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group, 1344c035e37bSAlexey Kardashevskiy int num); 1345c035e37bSAlexey Kardashevskiy static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable); 1346c035e37bSAlexey Kardashevskiy 1347781a868fSWei Yang static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe *pe) 1348781a868fSWei Yang { 1349781a868fSWei Yang struct iommu_table *tbl; 1350781a868fSWei Yang int64_t rc; 1351781a868fSWei Yang 1352b348aa65SAlexey Kardashevskiy tbl = pe->table_group.tables[0]; 1353c035e37bSAlexey Kardashevskiy rc = pnv_pci_ioda2_unset_window(&pe->table_group, 0); 1354781a868fSWei Yang if (rc) 1355781a868fSWei Yang pe_warn(pe, "OPAL error %ld release DMA window\n", rc); 1356781a868fSWei Yang 1357c035e37bSAlexey Kardashevskiy pnv_pci_ioda2_set_bypass(pe, false); 13580eaf4defSAlexey Kardashevskiy if (pe->table_group.group) { 13590eaf4defSAlexey Kardashevskiy iommu_group_put(pe->table_group.group); 13600eaf4defSAlexey Kardashevskiy BUG_ON(pe->table_group.group); 1361ac9a5889SAlexey Kardashevskiy } 1362aca6913fSAlexey Kardashevskiy pnv_pci_ioda2_table_free_pages(tbl); 1363781a868fSWei Yang iommu_free_table(tbl, of_node_full_name(dev->dev.of_node)); 1364781a868fSWei Yang } 1365781a868fSWei Yang 1366ee8222feSWei Yang static void pnv_ioda_release_vf_PE(struct pci_dev *pdev) 1367781a868fSWei Yang { 1368781a868fSWei Yang struct pci_bus *bus; 1369781a868fSWei Yang struct pci_controller *hose; 1370781a868fSWei Yang struct pnv_phb *phb; 1371781a868fSWei Yang struct pnv_ioda_pe *pe, *pe_n; 1372781a868fSWei Yang struct pci_dn *pdn; 1373781a868fSWei Yang 1374781a868fSWei Yang bus = pdev->bus; 1375781a868fSWei Yang hose = pci_bus_to_host(bus); 1376781a868fSWei Yang phb = hose->private_data; 137702639b0eSWei Yang pdn = pci_get_pdn(pdev); 1378781a868fSWei Yang 1379781a868fSWei Yang if (!pdev->is_physfn) 1380781a868fSWei Yang return; 1381781a868fSWei Yang 1382781a868fSWei Yang list_for_each_entry_safe(pe, pe_n, &phb->ioda.pe_list, list) { 1383781a868fSWei Yang if (pe->parent_dev != pdev) 1384781a868fSWei Yang continue; 1385781a868fSWei Yang 1386781a868fSWei Yang pnv_pci_ioda2_release_dma_pe(pdev, pe); 1387781a868fSWei Yang 1388781a868fSWei Yang /* Remove from list */ 1389781a868fSWei Yang mutex_lock(&phb->ioda.pe_list_mutex); 1390781a868fSWei Yang list_del(&pe->list); 1391781a868fSWei Yang mutex_unlock(&phb->ioda.pe_list_mutex); 1392781a868fSWei Yang 1393781a868fSWei Yang pnv_ioda_deconfigure_pe(phb, pe); 1394781a868fSWei Yang 13951e916772SGavin Shan pnv_ioda_free_pe(pe); 1396781a868fSWei Yang } 1397781a868fSWei Yang } 1398781a868fSWei Yang 1399781a868fSWei Yang void pnv_pci_sriov_disable(struct pci_dev *pdev) 1400781a868fSWei Yang { 1401781a868fSWei Yang struct pci_bus *bus; 1402781a868fSWei Yang struct pci_controller *hose; 1403781a868fSWei Yang struct pnv_phb *phb; 14041e916772SGavin Shan struct pnv_ioda_pe *pe; 1405781a868fSWei Yang struct pci_dn *pdn; 1406781a868fSWei Yang struct pci_sriov *iov; 1407be283eebSWei Yang u16 num_vfs, i; 1408781a868fSWei Yang 1409781a868fSWei Yang bus = pdev->bus; 1410781a868fSWei Yang hose = pci_bus_to_host(bus); 1411781a868fSWei Yang phb = hose->private_data; 1412781a868fSWei Yang pdn = pci_get_pdn(pdev); 1413781a868fSWei Yang iov = pdev->sriov; 1414781a868fSWei Yang num_vfs = pdn->num_vfs; 1415781a868fSWei Yang 1416781a868fSWei Yang /* Release VF PEs */ 1417ee8222feSWei Yang pnv_ioda_release_vf_PE(pdev); 1418781a868fSWei Yang 1419781a868fSWei Yang if (phb->type == PNV_PHB_IODA2) { 1420ee8222feSWei Yang if (!pdn->m64_single_mode) 1421be283eebSWei Yang pnv_pci_vf_resource_shift(pdev, -*pdn->pe_num_map); 1422781a868fSWei Yang 1423781a868fSWei Yang /* Release M64 windows */ 1424ee8222feSWei Yang pnv_pci_vf_release_m64(pdev, num_vfs); 1425781a868fSWei Yang 1426781a868fSWei Yang /* Release PE numbers */ 1427be283eebSWei Yang if (pdn->m64_single_mode) { 1428be283eebSWei Yang for (i = 0; i < num_vfs; i++) { 14291e916772SGavin Shan if (pdn->pe_num_map[i] == IODA_INVALID_PE) 14301e916772SGavin Shan continue; 14311e916772SGavin Shan 14321e916772SGavin Shan pe = &phb->ioda.pe_array[pdn->pe_num_map[i]]; 14331e916772SGavin Shan pnv_ioda_free_pe(pe); 1434be283eebSWei Yang } 1435be283eebSWei Yang } else 1436be283eebSWei Yang bitmap_clear(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs); 1437be283eebSWei Yang /* Releasing pe_num_map */ 1438be283eebSWei Yang kfree(pdn->pe_num_map); 1439781a868fSWei Yang } 1440781a868fSWei Yang } 1441781a868fSWei Yang 1442781a868fSWei Yang static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, 1443781a868fSWei Yang struct pnv_ioda_pe *pe); 1444781a868fSWei Yang static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs) 1445781a868fSWei Yang { 1446781a868fSWei Yang struct pci_bus *bus; 1447781a868fSWei Yang struct pci_controller *hose; 1448781a868fSWei Yang struct pnv_phb *phb; 1449781a868fSWei Yang struct pnv_ioda_pe *pe; 1450781a868fSWei Yang int pe_num; 1451781a868fSWei Yang u16 vf_index; 1452781a868fSWei Yang struct pci_dn *pdn; 1453781a868fSWei Yang 1454781a868fSWei Yang bus = pdev->bus; 1455781a868fSWei Yang hose = pci_bus_to_host(bus); 1456781a868fSWei Yang phb = hose->private_data; 1457781a868fSWei Yang pdn = pci_get_pdn(pdev); 1458781a868fSWei Yang 1459781a868fSWei Yang if (!pdev->is_physfn) 1460781a868fSWei Yang return; 1461781a868fSWei Yang 1462781a868fSWei Yang /* Reserve PE for each VF */ 1463781a868fSWei Yang for (vf_index = 0; vf_index < num_vfs; vf_index++) { 1464be283eebSWei Yang if (pdn->m64_single_mode) 1465be283eebSWei Yang pe_num = pdn->pe_num_map[vf_index]; 1466be283eebSWei Yang else 1467be283eebSWei Yang pe_num = *pdn->pe_num_map + vf_index; 1468781a868fSWei Yang 1469781a868fSWei Yang pe = &phb->ioda.pe_array[pe_num]; 1470781a868fSWei Yang pe->pe_number = pe_num; 1471781a868fSWei Yang pe->phb = phb; 1472781a868fSWei Yang pe->flags = PNV_IODA_PE_VF; 1473781a868fSWei Yang pe->pbus = NULL; 1474781a868fSWei Yang pe->parent_dev = pdev; 1475781a868fSWei Yang pe->mve_number = -1; 1476781a868fSWei Yang pe->rid = (pci_iov_virtfn_bus(pdev, vf_index) << 8) | 1477781a868fSWei Yang pci_iov_virtfn_devfn(pdev, vf_index); 1478781a868fSWei Yang 1479781a868fSWei Yang pe_info(pe, "VF %04d:%02d:%02d.%d associated with PE#%d\n", 1480781a868fSWei Yang hose->global_number, pdev->bus->number, 1481781a868fSWei Yang PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)), 1482781a868fSWei Yang PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)), pe_num); 1483781a868fSWei Yang 1484781a868fSWei Yang if (pnv_ioda_configure_pe(phb, pe)) { 1485781a868fSWei Yang /* XXX What do we do here ? */ 14861e916772SGavin Shan pnv_ioda_free_pe(pe); 1487781a868fSWei Yang pe->pdev = NULL; 1488781a868fSWei Yang continue; 1489781a868fSWei Yang } 1490781a868fSWei Yang 1491781a868fSWei Yang /* Put PE to the list */ 1492781a868fSWei Yang mutex_lock(&phb->ioda.pe_list_mutex); 1493781a868fSWei Yang list_add_tail(&pe->list, &phb->ioda.pe_list); 1494781a868fSWei Yang mutex_unlock(&phb->ioda.pe_list_mutex); 1495781a868fSWei Yang 1496781a868fSWei Yang pnv_pci_ioda2_setup_dma_pe(phb, pe); 1497781a868fSWei Yang } 1498781a868fSWei Yang } 1499781a868fSWei Yang 1500781a868fSWei Yang int pnv_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs) 1501781a868fSWei Yang { 1502781a868fSWei Yang struct pci_bus *bus; 1503781a868fSWei Yang struct pci_controller *hose; 1504781a868fSWei Yang struct pnv_phb *phb; 15051e916772SGavin Shan struct pnv_ioda_pe *pe; 1506781a868fSWei Yang struct pci_dn *pdn; 1507781a868fSWei Yang int ret; 1508be283eebSWei Yang u16 i; 1509781a868fSWei Yang 1510781a868fSWei Yang bus = pdev->bus; 1511781a868fSWei Yang hose = pci_bus_to_host(bus); 1512781a868fSWei Yang phb = hose->private_data; 1513781a868fSWei Yang pdn = pci_get_pdn(pdev); 1514781a868fSWei Yang 1515781a868fSWei Yang if (phb->type == PNV_PHB_IODA2) { 1516b0331854SWei Yang if (!pdn->vfs_expanded) { 1517b0331854SWei Yang dev_info(&pdev->dev, "don't support this SRIOV device" 1518b0331854SWei Yang " with non 64bit-prefetchable IOV BAR\n"); 1519b0331854SWei Yang return -ENOSPC; 1520b0331854SWei Yang } 1521b0331854SWei Yang 1522ee8222feSWei Yang /* 1523ee8222feSWei Yang * When M64 BARs functions in Single PE mode, the number of VFs 1524ee8222feSWei Yang * could be enabled must be less than the number of M64 BARs. 1525ee8222feSWei Yang */ 1526ee8222feSWei Yang if (pdn->m64_single_mode && num_vfs > phb->ioda.m64_bar_idx) { 1527ee8222feSWei Yang dev_info(&pdev->dev, "Not enough M64 BAR for VFs\n"); 1528ee8222feSWei Yang return -EBUSY; 1529ee8222feSWei Yang } 1530ee8222feSWei Yang 1531be283eebSWei Yang /* Allocating pe_num_map */ 1532be283eebSWei Yang if (pdn->m64_single_mode) 1533be283eebSWei Yang pdn->pe_num_map = kmalloc(sizeof(*pdn->pe_num_map) * num_vfs, 1534be283eebSWei Yang GFP_KERNEL); 1535be283eebSWei Yang else 1536be283eebSWei Yang pdn->pe_num_map = kmalloc(sizeof(*pdn->pe_num_map), GFP_KERNEL); 1537be283eebSWei Yang 1538be283eebSWei Yang if (!pdn->pe_num_map) 1539be283eebSWei Yang return -ENOMEM; 1540be283eebSWei Yang 1541be283eebSWei Yang if (pdn->m64_single_mode) 1542be283eebSWei Yang for (i = 0; i < num_vfs; i++) 1543be283eebSWei Yang pdn->pe_num_map[i] = IODA_INVALID_PE; 1544be283eebSWei Yang 1545781a868fSWei Yang /* Calculate available PE for required VFs */ 1546be283eebSWei Yang if (pdn->m64_single_mode) { 1547be283eebSWei Yang for (i = 0; i < num_vfs; i++) { 15481e916772SGavin Shan pe = pnv_ioda_alloc_pe(phb); 15491e916772SGavin Shan if (!pe) { 1550be283eebSWei Yang ret = -EBUSY; 1551be283eebSWei Yang goto m64_failed; 1552be283eebSWei Yang } 15531e916772SGavin Shan 15541e916772SGavin Shan pdn->pe_num_map[i] = pe->pe_number; 1555be283eebSWei Yang } 1556be283eebSWei Yang } else { 1557781a868fSWei Yang mutex_lock(&phb->ioda.pe_alloc_mutex); 1558be283eebSWei Yang *pdn->pe_num_map = bitmap_find_next_zero_area( 155992b8f137SGavin Shan phb->ioda.pe_alloc, phb->ioda.total_pe_num, 1560781a868fSWei Yang 0, num_vfs, 0); 156192b8f137SGavin Shan if (*pdn->pe_num_map >= phb->ioda.total_pe_num) { 1562781a868fSWei Yang mutex_unlock(&phb->ioda.pe_alloc_mutex); 1563781a868fSWei Yang dev_info(&pdev->dev, "Failed to enable VF%d\n", num_vfs); 1564be283eebSWei Yang kfree(pdn->pe_num_map); 1565781a868fSWei Yang return -EBUSY; 1566781a868fSWei Yang } 1567be283eebSWei Yang bitmap_set(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs); 1568781a868fSWei Yang mutex_unlock(&phb->ioda.pe_alloc_mutex); 1569be283eebSWei Yang } 1570be283eebSWei Yang pdn->num_vfs = num_vfs; 1571781a868fSWei Yang 1572781a868fSWei Yang /* Assign M64 window accordingly */ 157302639b0eSWei Yang ret = pnv_pci_vf_assign_m64(pdev, num_vfs); 1574781a868fSWei Yang if (ret) { 1575781a868fSWei Yang dev_info(&pdev->dev, "Not enough M64 window resources\n"); 1576781a868fSWei Yang goto m64_failed; 1577781a868fSWei Yang } 1578781a868fSWei Yang 1579781a868fSWei Yang /* 1580781a868fSWei Yang * When using one M64 BAR to map one IOV BAR, we need to shift 1581781a868fSWei Yang * the IOV BAR according to the PE# allocated to the VFs. 1582781a868fSWei Yang * Otherwise, the PE# for the VF will conflict with others. 1583781a868fSWei Yang */ 1584ee8222feSWei Yang if (!pdn->m64_single_mode) { 1585be283eebSWei Yang ret = pnv_pci_vf_resource_shift(pdev, *pdn->pe_num_map); 1586781a868fSWei Yang if (ret) 1587781a868fSWei Yang goto m64_failed; 1588781a868fSWei Yang } 158902639b0eSWei Yang } 1590781a868fSWei Yang 1591781a868fSWei Yang /* Setup VF PEs */ 1592781a868fSWei Yang pnv_ioda_setup_vf_PE(pdev, num_vfs); 1593781a868fSWei Yang 1594781a868fSWei Yang return 0; 1595781a868fSWei Yang 1596781a868fSWei Yang m64_failed: 1597be283eebSWei Yang if (pdn->m64_single_mode) { 1598be283eebSWei Yang for (i = 0; i < num_vfs; i++) { 15991e916772SGavin Shan if (pdn->pe_num_map[i] == IODA_INVALID_PE) 16001e916772SGavin Shan continue; 16011e916772SGavin Shan 16021e916772SGavin Shan pe = &phb->ioda.pe_array[pdn->pe_num_map[i]]; 16031e916772SGavin Shan pnv_ioda_free_pe(pe); 1604be283eebSWei Yang } 1605be283eebSWei Yang } else 1606be283eebSWei Yang bitmap_clear(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs); 1607be283eebSWei Yang 1608be283eebSWei Yang /* Releasing pe_num_map */ 1609be283eebSWei Yang kfree(pdn->pe_num_map); 1610781a868fSWei Yang 1611781a868fSWei Yang return ret; 1612781a868fSWei Yang } 1613781a868fSWei Yang 1614a8b2f828SGavin Shan int pcibios_sriov_disable(struct pci_dev *pdev) 1615a8b2f828SGavin Shan { 1616781a868fSWei Yang pnv_pci_sriov_disable(pdev); 1617781a868fSWei Yang 1618a8b2f828SGavin Shan /* Release PCI data */ 1619a8b2f828SGavin Shan remove_dev_pci_data(pdev); 1620a8b2f828SGavin Shan return 0; 1621a8b2f828SGavin Shan } 1622a8b2f828SGavin Shan 1623a8b2f828SGavin Shan int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs) 1624a8b2f828SGavin Shan { 1625a8b2f828SGavin Shan /* Allocate PCI data */ 1626a8b2f828SGavin Shan add_dev_pci_data(pdev); 1627781a868fSWei Yang 1628ee8222feSWei Yang return pnv_pci_sriov_enable(pdev, num_vfs); 1629a8b2f828SGavin Shan } 1630a8b2f828SGavin Shan #endif /* CONFIG_PCI_IOV */ 1631a8b2f828SGavin Shan 1632959c9bddSGavin Shan static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev) 1633184cd4a3SBenjamin Herrenschmidt { 1634b72c1f65SBenjamin Herrenschmidt struct pci_dn *pdn = pci_get_pdn(pdev); 1635959c9bddSGavin Shan struct pnv_ioda_pe *pe; 1636184cd4a3SBenjamin Herrenschmidt 1637959c9bddSGavin Shan /* 1638959c9bddSGavin Shan * The function can be called while the PE# 1639959c9bddSGavin Shan * hasn't been assigned. Do nothing for the 1640959c9bddSGavin Shan * case. 1641959c9bddSGavin Shan */ 1642959c9bddSGavin Shan if (!pdn || pdn->pe_number == IODA_INVALID_PE) 1643959c9bddSGavin Shan return; 1644184cd4a3SBenjamin Herrenschmidt 1645959c9bddSGavin Shan pe = &phb->ioda.pe_array[pdn->pe_number]; 1646cd15b048SBenjamin Herrenschmidt WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops); 16470e1ffef0SAlexey Kardashevskiy set_dma_offset(&pdev->dev, pe->tce_bypass_base); 1648b348aa65SAlexey Kardashevskiy set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]); 16494617082eSAlexey Kardashevskiy /* 16504617082eSAlexey Kardashevskiy * Note: iommu_add_device() will fail here as 16514617082eSAlexey Kardashevskiy * for physical PE: the device is already added by now; 16524617082eSAlexey Kardashevskiy * for virtual PE: sysfs entries are not ready yet and 16534617082eSAlexey Kardashevskiy * tce_iommu_bus_notifier will add the device to a group later. 16544617082eSAlexey Kardashevskiy */ 1655184cd4a3SBenjamin Herrenschmidt } 1656184cd4a3SBenjamin Herrenschmidt 1657763d2d8dSDaniel Axtens static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask) 1658cd15b048SBenjamin Herrenschmidt { 1659763d2d8dSDaniel Axtens struct pci_controller *hose = pci_bus_to_host(pdev->bus); 1660763d2d8dSDaniel Axtens struct pnv_phb *phb = hose->private_data; 1661cd15b048SBenjamin Herrenschmidt struct pci_dn *pdn = pci_get_pdn(pdev); 1662cd15b048SBenjamin Herrenschmidt struct pnv_ioda_pe *pe; 1663cd15b048SBenjamin Herrenschmidt uint64_t top; 1664cd15b048SBenjamin Herrenschmidt bool bypass = false; 1665cd15b048SBenjamin Herrenschmidt 1666cd15b048SBenjamin Herrenschmidt if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) 1667cd15b048SBenjamin Herrenschmidt return -ENODEV;; 1668cd15b048SBenjamin Herrenschmidt 1669cd15b048SBenjamin Herrenschmidt pe = &phb->ioda.pe_array[pdn->pe_number]; 1670cd15b048SBenjamin Herrenschmidt if (pe->tce_bypass_enabled) { 1671cd15b048SBenjamin Herrenschmidt top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1; 1672cd15b048SBenjamin Herrenschmidt bypass = (dma_mask >= top); 1673cd15b048SBenjamin Herrenschmidt } 1674cd15b048SBenjamin Herrenschmidt 1675cd15b048SBenjamin Herrenschmidt if (bypass) { 1676cd15b048SBenjamin Herrenschmidt dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n"); 1677cd15b048SBenjamin Herrenschmidt set_dma_ops(&pdev->dev, &dma_direct_ops); 1678cd15b048SBenjamin Herrenschmidt } else { 1679cd15b048SBenjamin Herrenschmidt dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n"); 1680cd15b048SBenjamin Herrenschmidt set_dma_ops(&pdev->dev, &dma_iommu_ops); 1681cd15b048SBenjamin Herrenschmidt } 1682a32305bfSBrian W Hart *pdev->dev.dma_mask = dma_mask; 16835d2aa710SAlistair Popple 16845d2aa710SAlistair Popple /* Update peer npu devices */ 1685f9f83456SAlexey Kardashevskiy pnv_npu_try_dma_set_bypass(pdev, bypass); 16865d2aa710SAlistair Popple 1687cd15b048SBenjamin Herrenschmidt return 0; 1688cd15b048SBenjamin Herrenschmidt } 1689cd15b048SBenjamin Herrenschmidt 169053522982SAndrew Donnellan static u64 pnv_pci_ioda_dma_get_required_mask(struct pci_dev *pdev) 1691fe7e85c6SGavin Shan { 169253522982SAndrew Donnellan struct pci_controller *hose = pci_bus_to_host(pdev->bus); 169353522982SAndrew Donnellan struct pnv_phb *phb = hose->private_data; 1694fe7e85c6SGavin Shan struct pci_dn *pdn = pci_get_pdn(pdev); 1695fe7e85c6SGavin Shan struct pnv_ioda_pe *pe; 1696fe7e85c6SGavin Shan u64 end, mask; 1697fe7e85c6SGavin Shan 1698fe7e85c6SGavin Shan if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) 1699fe7e85c6SGavin Shan return 0; 1700fe7e85c6SGavin Shan 1701fe7e85c6SGavin Shan pe = &phb->ioda.pe_array[pdn->pe_number]; 1702fe7e85c6SGavin Shan if (!pe->tce_bypass_enabled) 1703fe7e85c6SGavin Shan return __dma_get_required_mask(&pdev->dev); 1704fe7e85c6SGavin Shan 1705fe7e85c6SGavin Shan 1706fe7e85c6SGavin Shan end = pe->tce_bypass_base + memblock_end_of_DRAM(); 1707fe7e85c6SGavin Shan mask = 1ULL << (fls64(end) - 1); 1708fe7e85c6SGavin Shan mask += mask - 1; 1709fe7e85c6SGavin Shan 1710fe7e85c6SGavin Shan return mask; 1711fe7e85c6SGavin Shan } 1712fe7e85c6SGavin Shan 1713dff4a39eSGavin Shan static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, 1714ea30e99eSAlexey Kardashevskiy struct pci_bus *bus) 171574251fe2SBenjamin Herrenschmidt { 171674251fe2SBenjamin Herrenschmidt struct pci_dev *dev; 171774251fe2SBenjamin Herrenschmidt 171874251fe2SBenjamin Herrenschmidt list_for_each_entry(dev, &bus->devices, bus_list) { 1719b348aa65SAlexey Kardashevskiy set_iommu_table_base(&dev->dev, pe->table_group.tables[0]); 1720e91c2511SBenjamin Herrenschmidt set_dma_offset(&dev->dev, pe->tce_bypass_base); 17214617082eSAlexey Kardashevskiy iommu_add_device(&dev->dev); 1722dff4a39eSGavin Shan 17235c89a87dSAlexey Kardashevskiy if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) 1724ea30e99eSAlexey Kardashevskiy pnv_ioda_setup_bus_dma(pe, dev->subordinate); 172574251fe2SBenjamin Herrenschmidt } 172674251fe2SBenjamin Herrenschmidt } 172774251fe2SBenjamin Herrenschmidt 1728decbda25SAlexey Kardashevskiy static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl, 1729decbda25SAlexey Kardashevskiy unsigned long index, unsigned long npages, bool rm) 17304cce9550SGavin Shan { 17310eaf4defSAlexey Kardashevskiy struct iommu_table_group_link *tgl = list_first_entry_or_null( 17320eaf4defSAlexey Kardashevskiy &tbl->it_group_list, struct iommu_table_group_link, 17330eaf4defSAlexey Kardashevskiy next); 17340eaf4defSAlexey Kardashevskiy struct pnv_ioda_pe *pe = container_of(tgl->table_group, 1735b348aa65SAlexey Kardashevskiy struct pnv_ioda_pe, table_group); 17363ad26e5cSBenjamin Herrenschmidt __be64 __iomem *invalidate = rm ? 17375780fb04SAlexey Kardashevskiy (__be64 __iomem *)pe->phb->ioda.tce_inval_reg_phys : 17385780fb04SAlexey Kardashevskiy pe->phb->ioda.tce_inval_reg; 17394cce9550SGavin Shan unsigned long start, end, inc; 1740b0376c9bSAlexey Kardashevskiy const unsigned shift = tbl->it_page_shift; 17414cce9550SGavin Shan 1742decbda25SAlexey Kardashevskiy start = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset); 1743decbda25SAlexey Kardashevskiy end = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset + 1744decbda25SAlexey Kardashevskiy npages - 1); 17454cce9550SGavin Shan 17464cce9550SGavin Shan /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */ 17474cce9550SGavin Shan if (tbl->it_busno) { 1748b0376c9bSAlexey Kardashevskiy start <<= shift; 1749b0376c9bSAlexey Kardashevskiy end <<= shift; 1750b0376c9bSAlexey Kardashevskiy inc = 128ull << shift; 17514cce9550SGavin Shan start |= tbl->it_busno; 17524cce9550SGavin Shan end |= tbl->it_busno; 17534cce9550SGavin Shan } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) { 17544cce9550SGavin Shan /* p7ioc-style invalidation, 2 TCEs per write */ 17554cce9550SGavin Shan start |= (1ull << 63); 17564cce9550SGavin Shan end |= (1ull << 63); 17574cce9550SGavin Shan inc = 16; 17584cce9550SGavin Shan } else { 17594cce9550SGavin Shan /* Default (older HW) */ 17604cce9550SGavin Shan inc = 128; 17614cce9550SGavin Shan } 17624cce9550SGavin Shan 17634cce9550SGavin Shan end |= inc - 1; /* round up end to be different than start */ 17644cce9550SGavin Shan 17654cce9550SGavin Shan mb(); /* Ensure above stores are visible */ 17664cce9550SGavin Shan while (start <= end) { 17678e0a1611SAlexey Kardashevskiy if (rm) 17683ad26e5cSBenjamin Herrenschmidt __raw_rm_writeq(cpu_to_be64(start), invalidate); 17698e0a1611SAlexey Kardashevskiy else 17703a1a4661SBenjamin Herrenschmidt __raw_writeq(cpu_to_be64(start), invalidate); 17714cce9550SGavin Shan start += inc; 17724cce9550SGavin Shan } 17734cce9550SGavin Shan 17744cce9550SGavin Shan /* 17754cce9550SGavin Shan * The iommu layer will do another mb() for us on build() 17764cce9550SGavin Shan * and we don't care on free() 17774cce9550SGavin Shan */ 17784cce9550SGavin Shan } 17794cce9550SGavin Shan 1780decbda25SAlexey Kardashevskiy static int pnv_ioda1_tce_build(struct iommu_table *tbl, long index, 1781decbda25SAlexey Kardashevskiy long npages, unsigned long uaddr, 1782decbda25SAlexey Kardashevskiy enum dma_data_direction direction, 1783decbda25SAlexey Kardashevskiy struct dma_attrs *attrs) 1784decbda25SAlexey Kardashevskiy { 1785decbda25SAlexey Kardashevskiy int ret = pnv_tce_build(tbl, index, npages, uaddr, direction, 1786decbda25SAlexey Kardashevskiy attrs); 1787decbda25SAlexey Kardashevskiy 1788decbda25SAlexey Kardashevskiy if (!ret && (tbl->it_type & TCE_PCI_SWINV_CREATE)) 1789decbda25SAlexey Kardashevskiy pnv_pci_ioda1_tce_invalidate(tbl, index, npages, false); 1790decbda25SAlexey Kardashevskiy 1791decbda25SAlexey Kardashevskiy return ret; 1792decbda25SAlexey Kardashevskiy } 1793decbda25SAlexey Kardashevskiy 179405c6cfb9SAlexey Kardashevskiy #ifdef CONFIG_IOMMU_API 179505c6cfb9SAlexey Kardashevskiy static int pnv_ioda1_tce_xchg(struct iommu_table *tbl, long index, 179605c6cfb9SAlexey Kardashevskiy unsigned long *hpa, enum dma_data_direction *direction) 179705c6cfb9SAlexey Kardashevskiy { 179805c6cfb9SAlexey Kardashevskiy long ret = pnv_tce_xchg(tbl, index, hpa, direction); 179905c6cfb9SAlexey Kardashevskiy 180005c6cfb9SAlexey Kardashevskiy if (!ret && (tbl->it_type & 180105c6cfb9SAlexey Kardashevskiy (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE))) 180205c6cfb9SAlexey Kardashevskiy pnv_pci_ioda1_tce_invalidate(tbl, index, 1, false); 180305c6cfb9SAlexey Kardashevskiy 180405c6cfb9SAlexey Kardashevskiy return ret; 180505c6cfb9SAlexey Kardashevskiy } 180605c6cfb9SAlexey Kardashevskiy #endif 180705c6cfb9SAlexey Kardashevskiy 1808decbda25SAlexey Kardashevskiy static void pnv_ioda1_tce_free(struct iommu_table *tbl, long index, 1809decbda25SAlexey Kardashevskiy long npages) 1810decbda25SAlexey Kardashevskiy { 1811decbda25SAlexey Kardashevskiy pnv_tce_free(tbl, index, npages); 1812decbda25SAlexey Kardashevskiy 1813decbda25SAlexey Kardashevskiy if (tbl->it_type & TCE_PCI_SWINV_FREE) 1814decbda25SAlexey Kardashevskiy pnv_pci_ioda1_tce_invalidate(tbl, index, npages, false); 1815decbda25SAlexey Kardashevskiy } 1816decbda25SAlexey Kardashevskiy 1817da004c36SAlexey Kardashevskiy static struct iommu_table_ops pnv_ioda1_iommu_ops = { 1818decbda25SAlexey Kardashevskiy .set = pnv_ioda1_tce_build, 181905c6cfb9SAlexey Kardashevskiy #ifdef CONFIG_IOMMU_API 182005c6cfb9SAlexey Kardashevskiy .exchange = pnv_ioda1_tce_xchg, 182105c6cfb9SAlexey Kardashevskiy #endif 1822decbda25SAlexey Kardashevskiy .clear = pnv_ioda1_tce_free, 1823da004c36SAlexey Kardashevskiy .get = pnv_tce_get, 1824da004c36SAlexey Kardashevskiy }; 1825da004c36SAlexey Kardashevskiy 18260bbcdb43SAlexey Kardashevskiy #define TCE_KILL_INVAL_ALL PPC_BIT(0) 1827bef9253fSAlexey Kardashevskiy #define TCE_KILL_INVAL_PE PPC_BIT(1) 1828bef9253fSAlexey Kardashevskiy #define TCE_KILL_INVAL_TCE PPC_BIT(2) 1829bef9253fSAlexey Kardashevskiy 18300bbcdb43SAlexey Kardashevskiy void pnv_pci_ioda2_tce_invalidate_entire(struct pnv_phb *phb, bool rm) 18310bbcdb43SAlexey Kardashevskiy { 18320bbcdb43SAlexey Kardashevskiy const unsigned long val = TCE_KILL_INVAL_ALL; 18330bbcdb43SAlexey Kardashevskiy 18340bbcdb43SAlexey Kardashevskiy mb(); /* Ensure previous TCE table stores are visible */ 18350bbcdb43SAlexey Kardashevskiy if (rm) 18360bbcdb43SAlexey Kardashevskiy __raw_rm_writeq(cpu_to_be64(val), 18370bbcdb43SAlexey Kardashevskiy (__be64 __iomem *) 18380bbcdb43SAlexey Kardashevskiy phb->ioda.tce_inval_reg_phys); 18390bbcdb43SAlexey Kardashevskiy else 18400bbcdb43SAlexey Kardashevskiy __raw_writeq(cpu_to_be64(val), phb->ioda.tce_inval_reg); 18410bbcdb43SAlexey Kardashevskiy } 18420bbcdb43SAlexey Kardashevskiy 1843a7cf13caSAlexey Kardashevskiy static inline void pnv_pci_ioda2_tce_invalidate_pe(struct pnv_ioda_pe *pe) 18445780fb04SAlexey Kardashevskiy { 18455780fb04SAlexey Kardashevskiy /* 01xb - invalidate TCEs that match the specified PE# */ 1846bef9253fSAlexey Kardashevskiy unsigned long val = TCE_KILL_INVAL_PE | (pe->pe_number & 0xFF); 18475780fb04SAlexey Kardashevskiy struct pnv_phb *phb = pe->phb; 18485780fb04SAlexey Kardashevskiy 18495780fb04SAlexey Kardashevskiy if (!phb->ioda.tce_inval_reg) 18505780fb04SAlexey Kardashevskiy return; 18515780fb04SAlexey Kardashevskiy 18525780fb04SAlexey Kardashevskiy mb(); /* Ensure above stores are visible */ 18535780fb04SAlexey Kardashevskiy __raw_writeq(cpu_to_be64(val), phb->ioda.tce_inval_reg); 18545780fb04SAlexey Kardashevskiy } 18555780fb04SAlexey Kardashevskiy 1856e57080f1SAlexey Kardashevskiy static void pnv_pci_ioda2_do_tce_invalidate(unsigned pe_number, bool rm, 1857e57080f1SAlexey Kardashevskiy __be64 __iomem *invalidate, unsigned shift, 1858e57080f1SAlexey Kardashevskiy unsigned long index, unsigned long npages) 18594cce9550SGavin Shan { 18604cce9550SGavin Shan unsigned long start, end, inc; 18614cce9550SGavin Shan 18624cce9550SGavin Shan /* We'll invalidate DMA address in PE scope */ 1863bef9253fSAlexey Kardashevskiy start = TCE_KILL_INVAL_TCE; 1864e57080f1SAlexey Kardashevskiy start |= (pe_number & 0xFF); 18654cce9550SGavin Shan end = start; 18664cce9550SGavin Shan 18674cce9550SGavin Shan /* Figure out the start, end and step */ 1868decbda25SAlexey Kardashevskiy start |= (index << shift); 1869decbda25SAlexey Kardashevskiy end |= ((index + npages - 1) << shift); 1870b0376c9bSAlexey Kardashevskiy inc = (0x1ull << shift); 18714cce9550SGavin Shan mb(); 18724cce9550SGavin Shan 18734cce9550SGavin Shan while (start <= end) { 18748e0a1611SAlexey Kardashevskiy if (rm) 18753ad26e5cSBenjamin Herrenschmidt __raw_rm_writeq(cpu_to_be64(start), invalidate); 18768e0a1611SAlexey Kardashevskiy else 18773a1a4661SBenjamin Herrenschmidt __raw_writeq(cpu_to_be64(start), invalidate); 18784cce9550SGavin Shan start += inc; 18794cce9550SGavin Shan } 18804cce9550SGavin Shan } 18814cce9550SGavin Shan 1882e57080f1SAlexey Kardashevskiy static void pnv_pci_ioda2_tce_invalidate(struct iommu_table *tbl, 1883e57080f1SAlexey Kardashevskiy unsigned long index, unsigned long npages, bool rm) 1884e57080f1SAlexey Kardashevskiy { 1885e57080f1SAlexey Kardashevskiy struct iommu_table_group_link *tgl; 1886e57080f1SAlexey Kardashevskiy 1887e57080f1SAlexey Kardashevskiy list_for_each_entry_rcu(tgl, &tbl->it_group_list, next) { 1888e57080f1SAlexey Kardashevskiy struct pnv_ioda_pe *pe = container_of(tgl->table_group, 1889e57080f1SAlexey Kardashevskiy struct pnv_ioda_pe, table_group); 1890e57080f1SAlexey Kardashevskiy __be64 __iomem *invalidate = rm ? 1891e57080f1SAlexey Kardashevskiy (__be64 __iomem *)pe->phb->ioda.tce_inval_reg_phys : 1892e57080f1SAlexey Kardashevskiy pe->phb->ioda.tce_inval_reg; 1893e57080f1SAlexey Kardashevskiy 189485674868SAlexey Kardashevskiy if (pe->phb->type == PNV_PHB_NPU) { 18950bbcdb43SAlexey Kardashevskiy /* 18960bbcdb43SAlexey Kardashevskiy * The NVLink hardware does not support TCE kill 18970bbcdb43SAlexey Kardashevskiy * per TCE entry so we have to invalidate 18980bbcdb43SAlexey Kardashevskiy * the entire cache for it. 18990bbcdb43SAlexey Kardashevskiy */ 190085674868SAlexey Kardashevskiy pnv_pci_ioda2_tce_invalidate_entire(pe->phb, rm); 19015d2aa710SAlistair Popple continue; 19025d2aa710SAlistair Popple } 190385674868SAlexey Kardashevskiy pnv_pci_ioda2_do_tce_invalidate(pe->pe_number, rm, 190485674868SAlexey Kardashevskiy invalidate, tbl->it_page_shift, 190585674868SAlexey Kardashevskiy index, npages); 1906e57080f1SAlexey Kardashevskiy } 1907e57080f1SAlexey Kardashevskiy } 1908e57080f1SAlexey Kardashevskiy 1909decbda25SAlexey Kardashevskiy static int pnv_ioda2_tce_build(struct iommu_table *tbl, long index, 1910decbda25SAlexey Kardashevskiy long npages, unsigned long uaddr, 1911decbda25SAlexey Kardashevskiy enum dma_data_direction direction, 1912decbda25SAlexey Kardashevskiy struct dma_attrs *attrs) 19134cce9550SGavin Shan { 1914decbda25SAlexey Kardashevskiy int ret = pnv_tce_build(tbl, index, npages, uaddr, direction, 1915decbda25SAlexey Kardashevskiy attrs); 19164cce9550SGavin Shan 1917decbda25SAlexey Kardashevskiy if (!ret && (tbl->it_type & TCE_PCI_SWINV_CREATE)) 1918decbda25SAlexey Kardashevskiy pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false); 1919decbda25SAlexey Kardashevskiy 1920decbda25SAlexey Kardashevskiy return ret; 1921decbda25SAlexey Kardashevskiy } 1922decbda25SAlexey Kardashevskiy 192305c6cfb9SAlexey Kardashevskiy #ifdef CONFIG_IOMMU_API 192405c6cfb9SAlexey Kardashevskiy static int pnv_ioda2_tce_xchg(struct iommu_table *tbl, long index, 192505c6cfb9SAlexey Kardashevskiy unsigned long *hpa, enum dma_data_direction *direction) 192605c6cfb9SAlexey Kardashevskiy { 192705c6cfb9SAlexey Kardashevskiy long ret = pnv_tce_xchg(tbl, index, hpa, direction); 192805c6cfb9SAlexey Kardashevskiy 192905c6cfb9SAlexey Kardashevskiy if (!ret && (tbl->it_type & 193005c6cfb9SAlexey Kardashevskiy (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE))) 193105c6cfb9SAlexey Kardashevskiy pnv_pci_ioda2_tce_invalidate(tbl, index, 1, false); 193205c6cfb9SAlexey Kardashevskiy 193305c6cfb9SAlexey Kardashevskiy return ret; 193405c6cfb9SAlexey Kardashevskiy } 193505c6cfb9SAlexey Kardashevskiy #endif 193605c6cfb9SAlexey Kardashevskiy 1937decbda25SAlexey Kardashevskiy static void pnv_ioda2_tce_free(struct iommu_table *tbl, long index, 1938decbda25SAlexey Kardashevskiy long npages) 1939decbda25SAlexey Kardashevskiy { 1940decbda25SAlexey Kardashevskiy pnv_tce_free(tbl, index, npages); 1941decbda25SAlexey Kardashevskiy 1942decbda25SAlexey Kardashevskiy if (tbl->it_type & TCE_PCI_SWINV_FREE) 1943decbda25SAlexey Kardashevskiy pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false); 19444cce9550SGavin Shan } 19454cce9550SGavin Shan 19464793d65dSAlexey Kardashevskiy static void pnv_ioda2_table_free(struct iommu_table *tbl) 19474793d65dSAlexey Kardashevskiy { 19484793d65dSAlexey Kardashevskiy pnv_pci_ioda2_table_free_pages(tbl); 19494793d65dSAlexey Kardashevskiy iommu_free_table(tbl, "pnv"); 19504793d65dSAlexey Kardashevskiy } 19514793d65dSAlexey Kardashevskiy 1952da004c36SAlexey Kardashevskiy static struct iommu_table_ops pnv_ioda2_iommu_ops = { 1953decbda25SAlexey Kardashevskiy .set = pnv_ioda2_tce_build, 195405c6cfb9SAlexey Kardashevskiy #ifdef CONFIG_IOMMU_API 195505c6cfb9SAlexey Kardashevskiy .exchange = pnv_ioda2_tce_xchg, 195605c6cfb9SAlexey Kardashevskiy #endif 1957decbda25SAlexey Kardashevskiy .clear = pnv_ioda2_tce_free, 1958da004c36SAlexey Kardashevskiy .get = pnv_tce_get, 19594793d65dSAlexey Kardashevskiy .free = pnv_ioda2_table_free, 1960da004c36SAlexey Kardashevskiy }; 1961da004c36SAlexey Kardashevskiy 1962801846d1SGavin Shan static int pnv_pci_ioda_dev_dma_weight(struct pci_dev *dev, void *data) 1963801846d1SGavin Shan { 1964801846d1SGavin Shan unsigned int *weight = (unsigned int *)data; 1965801846d1SGavin Shan 1966801846d1SGavin Shan /* This is quite simplistic. The "base" weight of a device 1967801846d1SGavin Shan * is 10. 0 means no DMA is to be accounted for it. 1968801846d1SGavin Shan */ 1969801846d1SGavin Shan if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) 1970801846d1SGavin Shan return 0; 1971801846d1SGavin Shan 1972801846d1SGavin Shan if (dev->class == PCI_CLASS_SERIAL_USB_UHCI || 1973801846d1SGavin Shan dev->class == PCI_CLASS_SERIAL_USB_OHCI || 1974801846d1SGavin Shan dev->class == PCI_CLASS_SERIAL_USB_EHCI) 1975801846d1SGavin Shan *weight += 3; 1976801846d1SGavin Shan else if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) 1977801846d1SGavin Shan *weight += 15; 1978801846d1SGavin Shan else 1979801846d1SGavin Shan *weight += 10; 1980801846d1SGavin Shan 1981801846d1SGavin Shan return 0; 1982801846d1SGavin Shan } 1983801846d1SGavin Shan 1984801846d1SGavin Shan static unsigned int pnv_pci_ioda_pe_dma_weight(struct pnv_ioda_pe *pe) 1985801846d1SGavin Shan { 1986801846d1SGavin Shan unsigned int weight = 0; 1987801846d1SGavin Shan 1988801846d1SGavin Shan /* SRIOV VF has same DMA32 weight as its PF */ 1989801846d1SGavin Shan #ifdef CONFIG_PCI_IOV 1990801846d1SGavin Shan if ((pe->flags & PNV_IODA_PE_VF) && pe->parent_dev) { 1991801846d1SGavin Shan pnv_pci_ioda_dev_dma_weight(pe->parent_dev, &weight); 1992801846d1SGavin Shan return weight; 1993801846d1SGavin Shan } 1994801846d1SGavin Shan #endif 1995801846d1SGavin Shan 1996801846d1SGavin Shan if ((pe->flags & PNV_IODA_PE_DEV) && pe->pdev) { 1997801846d1SGavin Shan pnv_pci_ioda_dev_dma_weight(pe->pdev, &weight); 1998801846d1SGavin Shan } else if ((pe->flags & PNV_IODA_PE_BUS) && pe->pbus) { 1999801846d1SGavin Shan struct pci_dev *pdev; 2000801846d1SGavin Shan 2001801846d1SGavin Shan list_for_each_entry(pdev, &pe->pbus->devices, bus_list) 2002801846d1SGavin Shan pnv_pci_ioda_dev_dma_weight(pdev, &weight); 2003801846d1SGavin Shan } else if ((pe->flags & PNV_IODA_PE_BUS_ALL) && pe->pbus) { 2004801846d1SGavin Shan pci_walk_bus(pe->pbus, pnv_pci_ioda_dev_dma_weight, &weight); 2005801846d1SGavin Shan } 2006801846d1SGavin Shan 2007801846d1SGavin Shan return weight; 2008801846d1SGavin Shan } 2009801846d1SGavin Shan 2010b30d936fSGavin Shan static void pnv_pci_ioda1_setup_dma_pe(struct pnv_phb *phb, 20112b923ed1SGavin Shan struct pnv_ioda_pe *pe) 2012184cd4a3SBenjamin Herrenschmidt { 2013184cd4a3SBenjamin Herrenschmidt 2014184cd4a3SBenjamin Herrenschmidt struct page *tce_mem = NULL; 2015184cd4a3SBenjamin Herrenschmidt struct iommu_table *tbl; 20162b923ed1SGavin Shan unsigned int weight, total_weight = 0; 20172b923ed1SGavin Shan unsigned int tce32_segsz, base, segs, avail, i; 2018184cd4a3SBenjamin Herrenschmidt int64_t rc; 2019184cd4a3SBenjamin Herrenschmidt void *addr; 2020184cd4a3SBenjamin Herrenschmidt 2021184cd4a3SBenjamin Herrenschmidt /* XXX FIXME: Handle 64-bit only DMA devices */ 2022184cd4a3SBenjamin Herrenschmidt /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */ 2023184cd4a3SBenjamin Herrenschmidt /* XXX FIXME: Allocate multi-level tables on PHB3 */ 20242b923ed1SGavin Shan weight = pnv_pci_ioda_pe_dma_weight(pe); 20252b923ed1SGavin Shan if (!weight) 20262b923ed1SGavin Shan return; 2027184cd4a3SBenjamin Herrenschmidt 20282b923ed1SGavin Shan pci_walk_bus(phb->hose->bus, pnv_pci_ioda_dev_dma_weight, 20292b923ed1SGavin Shan &total_weight); 20302b923ed1SGavin Shan segs = (weight * phb->ioda.dma32_count) / total_weight; 20312b923ed1SGavin Shan if (!segs) 20322b923ed1SGavin Shan segs = 1; 20332b923ed1SGavin Shan 20342b923ed1SGavin Shan /* 20352b923ed1SGavin Shan * Allocate contiguous DMA32 segments. We begin with the expected 20362b923ed1SGavin Shan * number of segments. With one more attempt, the number of DMA32 20372b923ed1SGavin Shan * segments to be allocated is decreased by one until one segment 20382b923ed1SGavin Shan * is allocated successfully. 20392b923ed1SGavin Shan */ 20402b923ed1SGavin Shan do { 20412b923ed1SGavin Shan for (base = 0; base <= phb->ioda.dma32_count - segs; base++) { 20422b923ed1SGavin Shan for (avail = 0, i = base; i < base + segs; i++) { 20432b923ed1SGavin Shan if (phb->ioda.dma32_segmap[i] == 20442b923ed1SGavin Shan IODA_INVALID_PE) 20452b923ed1SGavin Shan avail++; 20462b923ed1SGavin Shan } 20472b923ed1SGavin Shan 20482b923ed1SGavin Shan if (avail == segs) 20492b923ed1SGavin Shan goto found; 20502b923ed1SGavin Shan } 20512b923ed1SGavin Shan } while (--segs); 20522b923ed1SGavin Shan 20532b923ed1SGavin Shan if (!segs) { 20542b923ed1SGavin Shan pe_warn(pe, "No available DMA32 segments\n"); 20552b923ed1SGavin Shan return; 20562b923ed1SGavin Shan } 20572b923ed1SGavin Shan 20582b923ed1SGavin Shan found: 20590eaf4defSAlexey Kardashevskiy tbl = pnv_pci_table_alloc(phb->hose->node); 2060b348aa65SAlexey Kardashevskiy iommu_register_group(&pe->table_group, phb->hose->global_number, 2061b348aa65SAlexey Kardashevskiy pe->pe_number); 20620eaf4defSAlexey Kardashevskiy pnv_pci_link_table_and_group(phb->hose->node, 0, tbl, &pe->table_group); 2063c5773822SAlexey Kardashevskiy 2064184cd4a3SBenjamin Herrenschmidt /* Grab a 32-bit TCE table */ 20652b923ed1SGavin Shan pe_info(pe, "DMA weight %d (%d), assigned (%d) %d DMA32 segments\n", 20662b923ed1SGavin Shan weight, total_weight, base, segs); 2067184cd4a3SBenjamin Herrenschmidt pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", 2068acce971cSGavin Shan base * PNV_IODA1_DMA32_SEGSIZE, 2069acce971cSGavin Shan (base + segs) * PNV_IODA1_DMA32_SEGSIZE - 1); 2070184cd4a3SBenjamin Herrenschmidt 2071184cd4a3SBenjamin Herrenschmidt /* XXX Currently, we allocate one big contiguous table for the 2072184cd4a3SBenjamin Herrenschmidt * TCEs. We only really need one chunk per 256M of TCE space 2073184cd4a3SBenjamin Herrenschmidt * (ie per segment) but that's an optimization for later, it 2074184cd4a3SBenjamin Herrenschmidt * requires some added smarts with our get/put_tce implementation 2075acce971cSGavin Shan * 2076acce971cSGavin Shan * Each TCE page is 4KB in size and each TCE entry occupies 8 2077acce971cSGavin Shan * bytes 2078184cd4a3SBenjamin Herrenschmidt */ 2079acce971cSGavin Shan tce32_segsz = PNV_IODA1_DMA32_SEGSIZE >> (IOMMU_PAGE_SHIFT_4K - 3); 2080184cd4a3SBenjamin Herrenschmidt tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, 2081acce971cSGavin Shan get_order(tce32_segsz * segs)); 2082184cd4a3SBenjamin Herrenschmidt if (!tce_mem) { 2083184cd4a3SBenjamin Herrenschmidt pe_err(pe, " Failed to allocate a 32-bit TCE memory\n"); 2084184cd4a3SBenjamin Herrenschmidt goto fail; 2085184cd4a3SBenjamin Herrenschmidt } 2086184cd4a3SBenjamin Herrenschmidt addr = page_address(tce_mem); 2087acce971cSGavin Shan memset(addr, 0, tce32_segsz * segs); 2088184cd4a3SBenjamin Herrenschmidt 2089184cd4a3SBenjamin Herrenschmidt /* Configure HW */ 2090184cd4a3SBenjamin Herrenschmidt for (i = 0; i < segs; i++) { 2091184cd4a3SBenjamin Herrenschmidt rc = opal_pci_map_pe_dma_window(phb->opal_id, 2092184cd4a3SBenjamin Herrenschmidt pe->pe_number, 2093184cd4a3SBenjamin Herrenschmidt base + i, 1, 2094acce971cSGavin Shan __pa(addr) + tce32_segsz * i, 2095acce971cSGavin Shan tce32_segsz, IOMMU_PAGE_SIZE_4K); 2096184cd4a3SBenjamin Herrenschmidt if (rc) { 2097184cd4a3SBenjamin Herrenschmidt pe_err(pe, " Failed to configure 32-bit TCE table," 2098184cd4a3SBenjamin Herrenschmidt " err %ld\n", rc); 2099184cd4a3SBenjamin Herrenschmidt goto fail; 2100184cd4a3SBenjamin Herrenschmidt } 2101184cd4a3SBenjamin Herrenschmidt } 2102184cd4a3SBenjamin Herrenschmidt 21032b923ed1SGavin Shan /* Setup DMA32 segment mapping */ 21042b923ed1SGavin Shan for (i = base; i < base + segs; i++) 21052b923ed1SGavin Shan phb->ioda.dma32_segmap[i] = pe->pe_number; 21062b923ed1SGavin Shan 2107184cd4a3SBenjamin Herrenschmidt /* Setup linux iommu table */ 2108acce971cSGavin Shan pnv_pci_setup_iommu_table(tbl, addr, tce32_segsz * segs, 2109acce971cSGavin Shan base * PNV_IODA1_DMA32_SEGSIZE, 2110acce971cSGavin Shan IOMMU_PAGE_SHIFT_4K); 2111184cd4a3SBenjamin Herrenschmidt 2112184cd4a3SBenjamin Herrenschmidt /* OPAL variant of P7IOC SW invalidated TCEs */ 21135780fb04SAlexey Kardashevskiy if (phb->ioda.tce_inval_reg) 211465fd766bSGavin Shan tbl->it_type |= (TCE_PCI_SWINV_CREATE | 211565fd766bSGavin Shan TCE_PCI_SWINV_FREE | 211665fd766bSGavin Shan TCE_PCI_SWINV_PAIR); 21175780fb04SAlexey Kardashevskiy 2118da004c36SAlexey Kardashevskiy tbl->it_ops = &pnv_ioda1_iommu_ops; 21194793d65dSAlexey Kardashevskiy pe->table_group.tce32_start = tbl->it_offset << tbl->it_page_shift; 21204793d65dSAlexey Kardashevskiy pe->table_group.tce32_size = tbl->it_size << tbl->it_page_shift; 2121184cd4a3SBenjamin Herrenschmidt iommu_init_table(tbl, phb->hose->node); 2122184cd4a3SBenjamin Herrenschmidt 2123781a868fSWei Yang if (pe->flags & PNV_IODA_PE_DEV) { 21244617082eSAlexey Kardashevskiy /* 21254617082eSAlexey Kardashevskiy * Setting table base here only for carrying iommu_group 21264617082eSAlexey Kardashevskiy * further down to let iommu_add_device() do the job. 21274617082eSAlexey Kardashevskiy * pnv_pci_ioda_dma_dev_setup will override it later anyway. 21284617082eSAlexey Kardashevskiy */ 21294617082eSAlexey Kardashevskiy set_iommu_table_base(&pe->pdev->dev, tbl); 21304617082eSAlexey Kardashevskiy iommu_add_device(&pe->pdev->dev); 2131c5773822SAlexey Kardashevskiy } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) 2132ea30e99eSAlexey Kardashevskiy pnv_ioda_setup_bus_dma(pe, pe->pbus); 213374251fe2SBenjamin Herrenschmidt 2134184cd4a3SBenjamin Herrenschmidt return; 2135184cd4a3SBenjamin Herrenschmidt fail: 2136184cd4a3SBenjamin Herrenschmidt /* XXX Failure: Try to fallback to 64-bit only ? */ 2137184cd4a3SBenjamin Herrenschmidt if (tce_mem) 2138acce971cSGavin Shan __free_pages(tce_mem, get_order(tce32_segsz * segs)); 21390eaf4defSAlexey Kardashevskiy if (tbl) { 21400eaf4defSAlexey Kardashevskiy pnv_pci_unlink_table_and_group(tbl, &pe->table_group); 21410eaf4defSAlexey Kardashevskiy iommu_free_table(tbl, "pnv"); 21420eaf4defSAlexey Kardashevskiy } 2143184cd4a3SBenjamin Herrenschmidt } 2144184cd4a3SBenjamin Herrenschmidt 214543cb60abSAlexey Kardashevskiy static long pnv_pci_ioda2_set_window(struct iommu_table_group *table_group, 214643cb60abSAlexey Kardashevskiy int num, struct iommu_table *tbl) 214743cb60abSAlexey Kardashevskiy { 214843cb60abSAlexey Kardashevskiy struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, 214943cb60abSAlexey Kardashevskiy table_group); 215043cb60abSAlexey Kardashevskiy struct pnv_phb *phb = pe->phb; 215143cb60abSAlexey Kardashevskiy int64_t rc; 2152bbb845c4SAlexey Kardashevskiy const unsigned long size = tbl->it_indirect_levels ? 2153bbb845c4SAlexey Kardashevskiy tbl->it_level_size : tbl->it_size; 215443cb60abSAlexey Kardashevskiy const __u64 start_addr = tbl->it_offset << tbl->it_page_shift; 215543cb60abSAlexey Kardashevskiy const __u64 win_size = tbl->it_size << tbl->it_page_shift; 215643cb60abSAlexey Kardashevskiy 21574793d65dSAlexey Kardashevskiy pe_info(pe, "Setting up window#%d %llx..%llx pg=%x\n", num, 215843cb60abSAlexey Kardashevskiy start_addr, start_addr + win_size - 1, 215943cb60abSAlexey Kardashevskiy IOMMU_PAGE_SIZE(tbl)); 216043cb60abSAlexey Kardashevskiy 216143cb60abSAlexey Kardashevskiy /* 216243cb60abSAlexey Kardashevskiy * Map TCE table through TVT. The TVE index is the PE number 216343cb60abSAlexey Kardashevskiy * shifted by 1 bit for 32-bits DMA space. 216443cb60abSAlexey Kardashevskiy */ 216543cb60abSAlexey Kardashevskiy rc = opal_pci_map_pe_dma_window(phb->opal_id, 216643cb60abSAlexey Kardashevskiy pe->pe_number, 21674793d65dSAlexey Kardashevskiy (pe->pe_number << 1) + num, 2168bbb845c4SAlexey Kardashevskiy tbl->it_indirect_levels + 1, 216943cb60abSAlexey Kardashevskiy __pa(tbl->it_base), 2170bbb845c4SAlexey Kardashevskiy size << 3, 217143cb60abSAlexey Kardashevskiy IOMMU_PAGE_SIZE(tbl)); 217243cb60abSAlexey Kardashevskiy if (rc) { 217343cb60abSAlexey Kardashevskiy pe_err(pe, "Failed to configure TCE table, err %ld\n", rc); 217443cb60abSAlexey Kardashevskiy return rc; 217543cb60abSAlexey Kardashevskiy } 217643cb60abSAlexey Kardashevskiy 217743cb60abSAlexey Kardashevskiy pnv_pci_link_table_and_group(phb->hose->node, num, 217843cb60abSAlexey Kardashevskiy tbl, &pe->table_group); 2179a7cf13caSAlexey Kardashevskiy pnv_pci_ioda2_tce_invalidate_pe(pe); 218043cb60abSAlexey Kardashevskiy 218143cb60abSAlexey Kardashevskiy return 0; 218243cb60abSAlexey Kardashevskiy } 218343cb60abSAlexey Kardashevskiy 2184f87a8864SAlexey Kardashevskiy static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable) 2185cd15b048SBenjamin Herrenschmidt { 2186cd15b048SBenjamin Herrenschmidt uint16_t window_id = (pe->pe_number << 1 ) + 1; 2187cd15b048SBenjamin Herrenschmidt int64_t rc; 2188cd15b048SBenjamin Herrenschmidt 2189cd15b048SBenjamin Herrenschmidt pe_info(pe, "%sabling 64-bit DMA bypass\n", enable ? "En" : "Dis"); 2190cd15b048SBenjamin Herrenschmidt if (enable) { 2191cd15b048SBenjamin Herrenschmidt phys_addr_t top = memblock_end_of_DRAM(); 2192cd15b048SBenjamin Herrenschmidt 2193cd15b048SBenjamin Herrenschmidt top = roundup_pow_of_two(top); 2194cd15b048SBenjamin Herrenschmidt rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, 2195cd15b048SBenjamin Herrenschmidt pe->pe_number, 2196cd15b048SBenjamin Herrenschmidt window_id, 2197cd15b048SBenjamin Herrenschmidt pe->tce_bypass_base, 2198cd15b048SBenjamin Herrenschmidt top); 2199cd15b048SBenjamin Herrenschmidt } else { 2200cd15b048SBenjamin Herrenschmidt rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, 2201cd15b048SBenjamin Herrenschmidt pe->pe_number, 2202cd15b048SBenjamin Herrenschmidt window_id, 2203cd15b048SBenjamin Herrenschmidt pe->tce_bypass_base, 2204cd15b048SBenjamin Herrenschmidt 0); 2205cd15b048SBenjamin Herrenschmidt } 2206cd15b048SBenjamin Herrenschmidt if (rc) 2207cd15b048SBenjamin Herrenschmidt pe_err(pe, "OPAL error %lld configuring bypass window\n", rc); 2208cd15b048SBenjamin Herrenschmidt else 2209cd15b048SBenjamin Herrenschmidt pe->tce_bypass_enabled = enable; 2210cd15b048SBenjamin Herrenschmidt } 2211cd15b048SBenjamin Herrenschmidt 22124793d65dSAlexey Kardashevskiy static long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset, 22134793d65dSAlexey Kardashevskiy __u32 page_shift, __u64 window_size, __u32 levels, 22144793d65dSAlexey Kardashevskiy struct iommu_table *tbl); 22154793d65dSAlexey Kardashevskiy 22164793d65dSAlexey Kardashevskiy static long pnv_pci_ioda2_create_table(struct iommu_table_group *table_group, 22174793d65dSAlexey Kardashevskiy int num, __u32 page_shift, __u64 window_size, __u32 levels, 22184793d65dSAlexey Kardashevskiy struct iommu_table **ptbl) 22194793d65dSAlexey Kardashevskiy { 22204793d65dSAlexey Kardashevskiy struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, 22214793d65dSAlexey Kardashevskiy table_group); 22224793d65dSAlexey Kardashevskiy int nid = pe->phb->hose->node; 22234793d65dSAlexey Kardashevskiy __u64 bus_offset = num ? pe->tce_bypass_base : table_group->tce32_start; 22244793d65dSAlexey Kardashevskiy long ret; 22254793d65dSAlexey Kardashevskiy struct iommu_table *tbl; 22264793d65dSAlexey Kardashevskiy 22274793d65dSAlexey Kardashevskiy tbl = pnv_pci_table_alloc(nid); 22284793d65dSAlexey Kardashevskiy if (!tbl) 22294793d65dSAlexey Kardashevskiy return -ENOMEM; 22304793d65dSAlexey Kardashevskiy 22314793d65dSAlexey Kardashevskiy ret = pnv_pci_ioda2_table_alloc_pages(nid, 22324793d65dSAlexey Kardashevskiy bus_offset, page_shift, window_size, 22334793d65dSAlexey Kardashevskiy levels, tbl); 22344793d65dSAlexey Kardashevskiy if (ret) { 22354793d65dSAlexey Kardashevskiy iommu_free_table(tbl, "pnv"); 22364793d65dSAlexey Kardashevskiy return ret; 22374793d65dSAlexey Kardashevskiy } 22384793d65dSAlexey Kardashevskiy 22394793d65dSAlexey Kardashevskiy tbl->it_ops = &pnv_ioda2_iommu_ops; 22404793d65dSAlexey Kardashevskiy if (pe->phb->ioda.tce_inval_reg) 22414793d65dSAlexey Kardashevskiy tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); 22424793d65dSAlexey Kardashevskiy 22434793d65dSAlexey Kardashevskiy *ptbl = tbl; 22444793d65dSAlexey Kardashevskiy 22454793d65dSAlexey Kardashevskiy return 0; 22464793d65dSAlexey Kardashevskiy } 22474793d65dSAlexey Kardashevskiy 224846d3e1e1SAlexey Kardashevskiy static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe) 224946d3e1e1SAlexey Kardashevskiy { 225046d3e1e1SAlexey Kardashevskiy struct iommu_table *tbl = NULL; 225146d3e1e1SAlexey Kardashevskiy long rc; 225246d3e1e1SAlexey Kardashevskiy 2253bb005455SNishanth Aravamudan /* 2254fa144869SNishanth Aravamudan * crashkernel= specifies the kdump kernel's maximum memory at 2255fa144869SNishanth Aravamudan * some offset and there is no guaranteed the result is a power 2256fa144869SNishanth Aravamudan * of 2, which will cause errors later. 2257fa144869SNishanth Aravamudan */ 2258fa144869SNishanth Aravamudan const u64 max_memory = __rounddown_pow_of_two(memory_hotplug_max()); 2259fa144869SNishanth Aravamudan 2260fa144869SNishanth Aravamudan /* 2261bb005455SNishanth Aravamudan * In memory constrained environments, e.g. kdump kernel, the 2262bb005455SNishanth Aravamudan * DMA window can be larger than available memory, which will 2263bb005455SNishanth Aravamudan * cause errors later. 2264bb005455SNishanth Aravamudan */ 2265fa144869SNishanth Aravamudan const u64 window_size = min((u64)pe->table_group.tce32_size, max_memory); 2266bb005455SNishanth Aravamudan 226746d3e1e1SAlexey Kardashevskiy rc = pnv_pci_ioda2_create_table(&pe->table_group, 0, 226846d3e1e1SAlexey Kardashevskiy IOMMU_PAGE_SHIFT_4K, 2269bb005455SNishanth Aravamudan window_size, 227046d3e1e1SAlexey Kardashevskiy POWERNV_IOMMU_DEFAULT_LEVELS, &tbl); 227146d3e1e1SAlexey Kardashevskiy if (rc) { 227246d3e1e1SAlexey Kardashevskiy pe_err(pe, "Failed to create 32-bit TCE table, err %ld", 227346d3e1e1SAlexey Kardashevskiy rc); 227446d3e1e1SAlexey Kardashevskiy return rc; 227546d3e1e1SAlexey Kardashevskiy } 227646d3e1e1SAlexey Kardashevskiy 227746d3e1e1SAlexey Kardashevskiy iommu_init_table(tbl, pe->phb->hose->node); 227846d3e1e1SAlexey Kardashevskiy 227946d3e1e1SAlexey Kardashevskiy rc = pnv_pci_ioda2_set_window(&pe->table_group, 0, tbl); 228046d3e1e1SAlexey Kardashevskiy if (rc) { 228146d3e1e1SAlexey Kardashevskiy pe_err(pe, "Failed to configure 32-bit TCE table, err %ld\n", 228246d3e1e1SAlexey Kardashevskiy rc); 228346d3e1e1SAlexey Kardashevskiy pnv_ioda2_table_free(tbl); 228446d3e1e1SAlexey Kardashevskiy return rc; 228546d3e1e1SAlexey Kardashevskiy } 228646d3e1e1SAlexey Kardashevskiy 228746d3e1e1SAlexey Kardashevskiy if (!pnv_iommu_bypass_disabled) 228846d3e1e1SAlexey Kardashevskiy pnv_pci_ioda2_set_bypass(pe, true); 228946d3e1e1SAlexey Kardashevskiy 229046d3e1e1SAlexey Kardashevskiy /* OPAL variant of PHB3 invalidated TCEs */ 229146d3e1e1SAlexey Kardashevskiy if (pe->phb->ioda.tce_inval_reg) 229246d3e1e1SAlexey Kardashevskiy tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); 229346d3e1e1SAlexey Kardashevskiy 229446d3e1e1SAlexey Kardashevskiy /* 229546d3e1e1SAlexey Kardashevskiy * Setting table base here only for carrying iommu_group 229646d3e1e1SAlexey Kardashevskiy * further down to let iommu_add_device() do the job. 229746d3e1e1SAlexey Kardashevskiy * pnv_pci_ioda_dma_dev_setup will override it later anyway. 229846d3e1e1SAlexey Kardashevskiy */ 229946d3e1e1SAlexey Kardashevskiy if (pe->flags & PNV_IODA_PE_DEV) 230046d3e1e1SAlexey Kardashevskiy set_iommu_table_base(&pe->pdev->dev, tbl); 230146d3e1e1SAlexey Kardashevskiy 230246d3e1e1SAlexey Kardashevskiy return 0; 230346d3e1e1SAlexey Kardashevskiy } 230446d3e1e1SAlexey Kardashevskiy 2305b5926430SAlexey Kardashevskiy #if defined(CONFIG_IOMMU_API) || defined(CONFIG_PCI_IOV) 2306b5926430SAlexey Kardashevskiy static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group, 2307b5926430SAlexey Kardashevskiy int num) 2308b5926430SAlexey Kardashevskiy { 2309b5926430SAlexey Kardashevskiy struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, 2310b5926430SAlexey Kardashevskiy table_group); 2311b5926430SAlexey Kardashevskiy struct pnv_phb *phb = pe->phb; 2312b5926430SAlexey Kardashevskiy long ret; 2313b5926430SAlexey Kardashevskiy 2314b5926430SAlexey Kardashevskiy pe_info(pe, "Removing DMA window #%d\n", num); 2315b5926430SAlexey Kardashevskiy 2316b5926430SAlexey Kardashevskiy ret = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, 2317b5926430SAlexey Kardashevskiy (pe->pe_number << 1) + num, 2318b5926430SAlexey Kardashevskiy 0/* levels */, 0/* table address */, 2319b5926430SAlexey Kardashevskiy 0/* table size */, 0/* page size */); 2320b5926430SAlexey Kardashevskiy if (ret) 2321b5926430SAlexey Kardashevskiy pe_warn(pe, "Unmapping failed, ret = %ld\n", ret); 2322b5926430SAlexey Kardashevskiy else 2323a7cf13caSAlexey Kardashevskiy pnv_pci_ioda2_tce_invalidate_pe(pe); 2324b5926430SAlexey Kardashevskiy 2325b5926430SAlexey Kardashevskiy pnv_pci_unlink_table_and_group(table_group->tables[num], table_group); 2326b5926430SAlexey Kardashevskiy 2327b5926430SAlexey Kardashevskiy return ret; 2328b5926430SAlexey Kardashevskiy } 2329b5926430SAlexey Kardashevskiy #endif 2330b5926430SAlexey Kardashevskiy 2331f87a8864SAlexey Kardashevskiy #ifdef CONFIG_IOMMU_API 233200547193SAlexey Kardashevskiy static unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift, 233300547193SAlexey Kardashevskiy __u64 window_size, __u32 levels) 233400547193SAlexey Kardashevskiy { 233500547193SAlexey Kardashevskiy unsigned long bytes = 0; 233600547193SAlexey Kardashevskiy const unsigned window_shift = ilog2(window_size); 233700547193SAlexey Kardashevskiy unsigned entries_shift = window_shift - page_shift; 233800547193SAlexey Kardashevskiy unsigned table_shift = entries_shift + 3; 233900547193SAlexey Kardashevskiy unsigned long tce_table_size = max(0x1000UL, 1UL << table_shift); 234000547193SAlexey Kardashevskiy unsigned long direct_table_size; 234100547193SAlexey Kardashevskiy 234200547193SAlexey Kardashevskiy if (!levels || (levels > POWERNV_IOMMU_MAX_LEVELS) || 234300547193SAlexey Kardashevskiy (window_size > memory_hotplug_max()) || 234400547193SAlexey Kardashevskiy !is_power_of_2(window_size)) 234500547193SAlexey Kardashevskiy return 0; 234600547193SAlexey Kardashevskiy 234700547193SAlexey Kardashevskiy /* Calculate a direct table size from window_size and levels */ 234800547193SAlexey Kardashevskiy entries_shift = (entries_shift + levels - 1) / levels; 234900547193SAlexey Kardashevskiy table_shift = entries_shift + 3; 235000547193SAlexey Kardashevskiy table_shift = max_t(unsigned, table_shift, PAGE_SHIFT); 235100547193SAlexey Kardashevskiy direct_table_size = 1UL << table_shift; 235200547193SAlexey Kardashevskiy 235300547193SAlexey Kardashevskiy for ( ; levels; --levels) { 235400547193SAlexey Kardashevskiy bytes += _ALIGN_UP(tce_table_size, direct_table_size); 235500547193SAlexey Kardashevskiy 235600547193SAlexey Kardashevskiy tce_table_size /= direct_table_size; 235700547193SAlexey Kardashevskiy tce_table_size <<= 3; 235800547193SAlexey Kardashevskiy tce_table_size = _ALIGN_UP(tce_table_size, direct_table_size); 235900547193SAlexey Kardashevskiy } 236000547193SAlexey Kardashevskiy 236100547193SAlexey Kardashevskiy return bytes; 236200547193SAlexey Kardashevskiy } 236300547193SAlexey Kardashevskiy 2364f87a8864SAlexey Kardashevskiy static void pnv_ioda2_take_ownership(struct iommu_table_group *table_group) 2365cd15b048SBenjamin Herrenschmidt { 2366f87a8864SAlexey Kardashevskiy struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, 2367f87a8864SAlexey Kardashevskiy table_group); 236846d3e1e1SAlexey Kardashevskiy /* Store @tbl as pnv_pci_ioda2_unset_window() resets it */ 236946d3e1e1SAlexey Kardashevskiy struct iommu_table *tbl = pe->table_group.tables[0]; 2370cd15b048SBenjamin Herrenschmidt 2371f87a8864SAlexey Kardashevskiy pnv_pci_ioda2_set_bypass(pe, false); 237246d3e1e1SAlexey Kardashevskiy pnv_pci_ioda2_unset_window(&pe->table_group, 0); 237346d3e1e1SAlexey Kardashevskiy pnv_ioda2_table_free(tbl); 2374cd15b048SBenjamin Herrenschmidt } 2375cd15b048SBenjamin Herrenschmidt 2376f87a8864SAlexey Kardashevskiy static void pnv_ioda2_release_ownership(struct iommu_table_group *table_group) 2377f87a8864SAlexey Kardashevskiy { 2378f87a8864SAlexey Kardashevskiy struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, 2379f87a8864SAlexey Kardashevskiy table_group); 2380f87a8864SAlexey Kardashevskiy 238146d3e1e1SAlexey Kardashevskiy pnv_pci_ioda2_setup_default_config(pe); 2382f87a8864SAlexey Kardashevskiy } 2383f87a8864SAlexey Kardashevskiy 2384f87a8864SAlexey Kardashevskiy static struct iommu_table_group_ops pnv_pci_ioda2_ops = { 238500547193SAlexey Kardashevskiy .get_table_size = pnv_pci_ioda2_get_table_size, 23864793d65dSAlexey Kardashevskiy .create_table = pnv_pci_ioda2_create_table, 23874793d65dSAlexey Kardashevskiy .set_window = pnv_pci_ioda2_set_window, 23884793d65dSAlexey Kardashevskiy .unset_window = pnv_pci_ioda2_unset_window, 2389f87a8864SAlexey Kardashevskiy .take_ownership = pnv_ioda2_take_ownership, 2390f87a8864SAlexey Kardashevskiy .release_ownership = pnv_ioda2_release_ownership, 2391f87a8864SAlexey Kardashevskiy }; 2392b5cb9ab1SAlexey Kardashevskiy 2393b5cb9ab1SAlexey Kardashevskiy static int gpe_table_group_to_npe_cb(struct device *dev, void *opaque) 2394b5cb9ab1SAlexey Kardashevskiy { 2395b5cb9ab1SAlexey Kardashevskiy struct pci_controller *hose; 2396b5cb9ab1SAlexey Kardashevskiy struct pnv_phb *phb; 2397b5cb9ab1SAlexey Kardashevskiy struct pnv_ioda_pe **ptmppe = opaque; 2398b5cb9ab1SAlexey Kardashevskiy struct pci_dev *pdev = container_of(dev, struct pci_dev, dev); 2399b5cb9ab1SAlexey Kardashevskiy struct pci_dn *pdn = pci_get_pdn(pdev); 2400b5cb9ab1SAlexey Kardashevskiy 2401b5cb9ab1SAlexey Kardashevskiy if (!pdn || pdn->pe_number == IODA_INVALID_PE) 2402b5cb9ab1SAlexey Kardashevskiy return 0; 2403b5cb9ab1SAlexey Kardashevskiy 2404b5cb9ab1SAlexey Kardashevskiy hose = pci_bus_to_host(pdev->bus); 2405b5cb9ab1SAlexey Kardashevskiy phb = hose->private_data; 2406b5cb9ab1SAlexey Kardashevskiy if (phb->type != PNV_PHB_NPU) 2407b5cb9ab1SAlexey Kardashevskiy return 0; 2408b5cb9ab1SAlexey Kardashevskiy 2409b5cb9ab1SAlexey Kardashevskiy *ptmppe = &phb->ioda.pe_array[pdn->pe_number]; 2410b5cb9ab1SAlexey Kardashevskiy 2411b5cb9ab1SAlexey Kardashevskiy return 1; 2412b5cb9ab1SAlexey Kardashevskiy } 2413b5cb9ab1SAlexey Kardashevskiy 2414b5cb9ab1SAlexey Kardashevskiy /* 2415b5cb9ab1SAlexey Kardashevskiy * This returns PE of associated NPU. 2416b5cb9ab1SAlexey Kardashevskiy * This assumes that NPU is in the same IOMMU group with GPU and there is 2417b5cb9ab1SAlexey Kardashevskiy * no other PEs. 2418b5cb9ab1SAlexey Kardashevskiy */ 2419b5cb9ab1SAlexey Kardashevskiy static struct pnv_ioda_pe *gpe_table_group_to_npe( 2420b5cb9ab1SAlexey Kardashevskiy struct iommu_table_group *table_group) 2421b5cb9ab1SAlexey Kardashevskiy { 2422b5cb9ab1SAlexey Kardashevskiy struct pnv_ioda_pe *npe = NULL; 2423b5cb9ab1SAlexey Kardashevskiy int ret = iommu_group_for_each_dev(table_group->group, &npe, 2424b5cb9ab1SAlexey Kardashevskiy gpe_table_group_to_npe_cb); 2425b5cb9ab1SAlexey Kardashevskiy 2426b5cb9ab1SAlexey Kardashevskiy BUG_ON(!ret || !npe); 2427b5cb9ab1SAlexey Kardashevskiy 2428b5cb9ab1SAlexey Kardashevskiy return npe; 2429b5cb9ab1SAlexey Kardashevskiy } 2430b5cb9ab1SAlexey Kardashevskiy 2431b5cb9ab1SAlexey Kardashevskiy static long pnv_pci_ioda2_npu_set_window(struct iommu_table_group *table_group, 2432b5cb9ab1SAlexey Kardashevskiy int num, struct iommu_table *tbl) 2433b5cb9ab1SAlexey Kardashevskiy { 2434b5cb9ab1SAlexey Kardashevskiy long ret = pnv_pci_ioda2_set_window(table_group, num, tbl); 2435b5cb9ab1SAlexey Kardashevskiy 2436b5cb9ab1SAlexey Kardashevskiy if (ret) 2437b5cb9ab1SAlexey Kardashevskiy return ret; 2438b5cb9ab1SAlexey Kardashevskiy 2439b5cb9ab1SAlexey Kardashevskiy ret = pnv_npu_set_window(gpe_table_group_to_npe(table_group), num, tbl); 2440b5cb9ab1SAlexey Kardashevskiy if (ret) 2441b5cb9ab1SAlexey Kardashevskiy pnv_pci_ioda2_unset_window(table_group, num); 2442b5cb9ab1SAlexey Kardashevskiy 2443b5cb9ab1SAlexey Kardashevskiy return ret; 2444b5cb9ab1SAlexey Kardashevskiy } 2445b5cb9ab1SAlexey Kardashevskiy 2446b5cb9ab1SAlexey Kardashevskiy static long pnv_pci_ioda2_npu_unset_window( 2447b5cb9ab1SAlexey Kardashevskiy struct iommu_table_group *table_group, 2448b5cb9ab1SAlexey Kardashevskiy int num) 2449b5cb9ab1SAlexey Kardashevskiy { 2450b5cb9ab1SAlexey Kardashevskiy long ret = pnv_pci_ioda2_unset_window(table_group, num); 2451b5cb9ab1SAlexey Kardashevskiy 2452b5cb9ab1SAlexey Kardashevskiy if (ret) 2453b5cb9ab1SAlexey Kardashevskiy return ret; 2454b5cb9ab1SAlexey Kardashevskiy 2455b5cb9ab1SAlexey Kardashevskiy return pnv_npu_unset_window(gpe_table_group_to_npe(table_group), num); 2456b5cb9ab1SAlexey Kardashevskiy } 2457b5cb9ab1SAlexey Kardashevskiy 2458b5cb9ab1SAlexey Kardashevskiy static void pnv_ioda2_npu_take_ownership(struct iommu_table_group *table_group) 2459b5cb9ab1SAlexey Kardashevskiy { 2460b5cb9ab1SAlexey Kardashevskiy /* 2461b5cb9ab1SAlexey Kardashevskiy * Detach NPU first as pnv_ioda2_take_ownership() will destroy 2462b5cb9ab1SAlexey Kardashevskiy * the iommu_table if 32bit DMA is enabled. 2463b5cb9ab1SAlexey Kardashevskiy */ 2464b5cb9ab1SAlexey Kardashevskiy pnv_npu_take_ownership(gpe_table_group_to_npe(table_group)); 2465b5cb9ab1SAlexey Kardashevskiy pnv_ioda2_take_ownership(table_group); 2466b5cb9ab1SAlexey Kardashevskiy } 2467b5cb9ab1SAlexey Kardashevskiy 2468b5cb9ab1SAlexey Kardashevskiy static struct iommu_table_group_ops pnv_pci_ioda2_npu_ops = { 2469b5cb9ab1SAlexey Kardashevskiy .get_table_size = pnv_pci_ioda2_get_table_size, 2470b5cb9ab1SAlexey Kardashevskiy .create_table = pnv_pci_ioda2_create_table, 2471b5cb9ab1SAlexey Kardashevskiy .set_window = pnv_pci_ioda2_npu_set_window, 2472b5cb9ab1SAlexey Kardashevskiy .unset_window = pnv_pci_ioda2_npu_unset_window, 2473b5cb9ab1SAlexey Kardashevskiy .take_ownership = pnv_ioda2_npu_take_ownership, 2474b5cb9ab1SAlexey Kardashevskiy .release_ownership = pnv_ioda2_release_ownership, 2475b5cb9ab1SAlexey Kardashevskiy }; 2476b5cb9ab1SAlexey Kardashevskiy 2477b5cb9ab1SAlexey Kardashevskiy static void pnv_pci_ioda_setup_iommu_api(void) 2478b5cb9ab1SAlexey Kardashevskiy { 2479b5cb9ab1SAlexey Kardashevskiy struct pci_controller *hose, *tmp; 2480b5cb9ab1SAlexey Kardashevskiy struct pnv_phb *phb; 2481b5cb9ab1SAlexey Kardashevskiy struct pnv_ioda_pe *pe, *gpe; 2482b5cb9ab1SAlexey Kardashevskiy 2483b5cb9ab1SAlexey Kardashevskiy /* 2484b5cb9ab1SAlexey Kardashevskiy * Now we have all PHBs discovered, time to add NPU devices to 2485b5cb9ab1SAlexey Kardashevskiy * the corresponding IOMMU groups. 2486b5cb9ab1SAlexey Kardashevskiy */ 2487b5cb9ab1SAlexey Kardashevskiy list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { 2488b5cb9ab1SAlexey Kardashevskiy phb = hose->private_data; 2489b5cb9ab1SAlexey Kardashevskiy 2490b5cb9ab1SAlexey Kardashevskiy if (phb->type != PNV_PHB_NPU) 2491b5cb9ab1SAlexey Kardashevskiy continue; 2492b5cb9ab1SAlexey Kardashevskiy 2493b5cb9ab1SAlexey Kardashevskiy list_for_each_entry(pe, &phb->ioda.pe_list, list) { 2494b5cb9ab1SAlexey Kardashevskiy gpe = pnv_pci_npu_setup_iommu(pe); 2495b5cb9ab1SAlexey Kardashevskiy if (gpe) 2496b5cb9ab1SAlexey Kardashevskiy gpe->table_group.ops = &pnv_pci_ioda2_npu_ops; 2497b5cb9ab1SAlexey Kardashevskiy } 2498b5cb9ab1SAlexey Kardashevskiy } 2499b5cb9ab1SAlexey Kardashevskiy } 2500b5cb9ab1SAlexey Kardashevskiy #else /* !CONFIG_IOMMU_API */ 2501b5cb9ab1SAlexey Kardashevskiy static void pnv_pci_ioda_setup_iommu_api(void) { }; 2502f87a8864SAlexey Kardashevskiy #endif 2503f87a8864SAlexey Kardashevskiy 25045780fb04SAlexey Kardashevskiy static void pnv_pci_ioda_setup_opal_tce_kill(struct pnv_phb *phb) 25055780fb04SAlexey Kardashevskiy { 25065780fb04SAlexey Kardashevskiy const __be64 *swinvp; 25075780fb04SAlexey Kardashevskiy 25085780fb04SAlexey Kardashevskiy /* OPAL variant of PHB3 invalidated TCEs */ 25095780fb04SAlexey Kardashevskiy swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); 25105780fb04SAlexey Kardashevskiy if (!swinvp) 25115780fb04SAlexey Kardashevskiy return; 25125780fb04SAlexey Kardashevskiy 25135780fb04SAlexey Kardashevskiy phb->ioda.tce_inval_reg_phys = be64_to_cpup(swinvp); 25145780fb04SAlexey Kardashevskiy phb->ioda.tce_inval_reg = ioremap(phb->ioda.tce_inval_reg_phys, 8); 25155780fb04SAlexey Kardashevskiy } 25165780fb04SAlexey Kardashevskiy 2517bbb845c4SAlexey Kardashevskiy static __be64 *pnv_pci_ioda2_table_do_alloc_pages(int nid, unsigned shift, 2518bbb845c4SAlexey Kardashevskiy unsigned levels, unsigned long limit, 25193ba3a73eSAlexey Kardashevskiy unsigned long *current_offset, unsigned long *total_allocated) 2520aca6913fSAlexey Kardashevskiy { 2521aca6913fSAlexey Kardashevskiy struct page *tce_mem = NULL; 2522bbb845c4SAlexey Kardashevskiy __be64 *addr, *tmp; 2523aca6913fSAlexey Kardashevskiy unsigned order = max_t(unsigned, shift, PAGE_SHIFT) - PAGE_SHIFT; 2524bbb845c4SAlexey Kardashevskiy unsigned long allocated = 1UL << (order + PAGE_SHIFT); 2525bbb845c4SAlexey Kardashevskiy unsigned entries = 1UL << (shift - 3); 2526bbb845c4SAlexey Kardashevskiy long i; 2527aca6913fSAlexey Kardashevskiy 2528aca6913fSAlexey Kardashevskiy tce_mem = alloc_pages_node(nid, GFP_KERNEL, order); 2529aca6913fSAlexey Kardashevskiy if (!tce_mem) { 2530aca6913fSAlexey Kardashevskiy pr_err("Failed to allocate a TCE memory, order=%d\n", order); 2531aca6913fSAlexey Kardashevskiy return NULL; 2532aca6913fSAlexey Kardashevskiy } 2533aca6913fSAlexey Kardashevskiy addr = page_address(tce_mem); 2534bbb845c4SAlexey Kardashevskiy memset(addr, 0, allocated); 25353ba3a73eSAlexey Kardashevskiy *total_allocated += allocated; 2536bbb845c4SAlexey Kardashevskiy 2537bbb845c4SAlexey Kardashevskiy --levels; 2538bbb845c4SAlexey Kardashevskiy if (!levels) { 2539bbb845c4SAlexey Kardashevskiy *current_offset += allocated; 2540bbb845c4SAlexey Kardashevskiy return addr; 2541bbb845c4SAlexey Kardashevskiy } 2542bbb845c4SAlexey Kardashevskiy 2543bbb845c4SAlexey Kardashevskiy for (i = 0; i < entries; ++i) { 2544bbb845c4SAlexey Kardashevskiy tmp = pnv_pci_ioda2_table_do_alloc_pages(nid, shift, 25453ba3a73eSAlexey Kardashevskiy levels, limit, current_offset, total_allocated); 2546bbb845c4SAlexey Kardashevskiy if (!tmp) 2547bbb845c4SAlexey Kardashevskiy break; 2548bbb845c4SAlexey Kardashevskiy 2549bbb845c4SAlexey Kardashevskiy addr[i] = cpu_to_be64(__pa(tmp) | 2550bbb845c4SAlexey Kardashevskiy TCE_PCI_READ | TCE_PCI_WRITE); 2551bbb845c4SAlexey Kardashevskiy 2552bbb845c4SAlexey Kardashevskiy if (*current_offset >= limit) 2553bbb845c4SAlexey Kardashevskiy break; 2554bbb845c4SAlexey Kardashevskiy } 2555aca6913fSAlexey Kardashevskiy 2556aca6913fSAlexey Kardashevskiy return addr; 2557aca6913fSAlexey Kardashevskiy } 2558aca6913fSAlexey Kardashevskiy 2559bbb845c4SAlexey Kardashevskiy static void pnv_pci_ioda2_table_do_free_pages(__be64 *addr, 2560bbb845c4SAlexey Kardashevskiy unsigned long size, unsigned level); 2561bbb845c4SAlexey Kardashevskiy 2562aca6913fSAlexey Kardashevskiy static long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset, 2563bbb845c4SAlexey Kardashevskiy __u32 page_shift, __u64 window_size, __u32 levels, 2564bbb845c4SAlexey Kardashevskiy struct iommu_table *tbl) 2565aca6913fSAlexey Kardashevskiy { 2566aca6913fSAlexey Kardashevskiy void *addr; 25673ba3a73eSAlexey Kardashevskiy unsigned long offset = 0, level_shift, total_allocated = 0; 2568aca6913fSAlexey Kardashevskiy const unsigned window_shift = ilog2(window_size); 2569aca6913fSAlexey Kardashevskiy unsigned entries_shift = window_shift - page_shift; 2570aca6913fSAlexey Kardashevskiy unsigned table_shift = max_t(unsigned, entries_shift + 3, PAGE_SHIFT); 2571aca6913fSAlexey Kardashevskiy const unsigned long tce_table_size = 1UL << table_shift; 2572aca6913fSAlexey Kardashevskiy 2573bbb845c4SAlexey Kardashevskiy if (!levels || (levels > POWERNV_IOMMU_MAX_LEVELS)) 2574bbb845c4SAlexey Kardashevskiy return -EINVAL; 2575bbb845c4SAlexey Kardashevskiy 2576aca6913fSAlexey Kardashevskiy if ((window_size > memory_hotplug_max()) || !is_power_of_2(window_size)) 2577aca6913fSAlexey Kardashevskiy return -EINVAL; 2578aca6913fSAlexey Kardashevskiy 2579bbb845c4SAlexey Kardashevskiy /* Adjust direct table size from window_size and levels */ 2580bbb845c4SAlexey Kardashevskiy entries_shift = (entries_shift + levels - 1) / levels; 2581bbb845c4SAlexey Kardashevskiy level_shift = entries_shift + 3; 2582bbb845c4SAlexey Kardashevskiy level_shift = max_t(unsigned, level_shift, PAGE_SHIFT); 2583bbb845c4SAlexey Kardashevskiy 2584aca6913fSAlexey Kardashevskiy /* Allocate TCE table */ 2585bbb845c4SAlexey Kardashevskiy addr = pnv_pci_ioda2_table_do_alloc_pages(nid, level_shift, 25863ba3a73eSAlexey Kardashevskiy levels, tce_table_size, &offset, &total_allocated); 2587bbb845c4SAlexey Kardashevskiy 2588bbb845c4SAlexey Kardashevskiy /* addr==NULL means that the first level allocation failed */ 2589aca6913fSAlexey Kardashevskiy if (!addr) 2590aca6913fSAlexey Kardashevskiy return -ENOMEM; 2591aca6913fSAlexey Kardashevskiy 2592bbb845c4SAlexey Kardashevskiy /* 2593bbb845c4SAlexey Kardashevskiy * First level was allocated but some lower level failed as 2594bbb845c4SAlexey Kardashevskiy * we did not allocate as much as we wanted, 2595bbb845c4SAlexey Kardashevskiy * release partially allocated table. 2596bbb845c4SAlexey Kardashevskiy */ 2597bbb845c4SAlexey Kardashevskiy if (offset < tce_table_size) { 2598bbb845c4SAlexey Kardashevskiy pnv_pci_ioda2_table_do_free_pages(addr, 2599bbb845c4SAlexey Kardashevskiy 1ULL << (level_shift - 3), levels - 1); 2600bbb845c4SAlexey Kardashevskiy return -ENOMEM; 2601bbb845c4SAlexey Kardashevskiy } 2602bbb845c4SAlexey Kardashevskiy 2603aca6913fSAlexey Kardashevskiy /* Setup linux iommu table */ 2604aca6913fSAlexey Kardashevskiy pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, bus_offset, 2605aca6913fSAlexey Kardashevskiy page_shift); 2606bbb845c4SAlexey Kardashevskiy tbl->it_level_size = 1ULL << (level_shift - 3); 2607bbb845c4SAlexey Kardashevskiy tbl->it_indirect_levels = levels - 1; 26083ba3a73eSAlexey Kardashevskiy tbl->it_allocated_size = total_allocated; 2609aca6913fSAlexey Kardashevskiy 2610aca6913fSAlexey Kardashevskiy pr_devel("Created TCE table: ws=%08llx ts=%lx @%08llx\n", 2611aca6913fSAlexey Kardashevskiy window_size, tce_table_size, bus_offset); 2612aca6913fSAlexey Kardashevskiy 2613aca6913fSAlexey Kardashevskiy return 0; 2614aca6913fSAlexey Kardashevskiy } 2615aca6913fSAlexey Kardashevskiy 2616bbb845c4SAlexey Kardashevskiy static void pnv_pci_ioda2_table_do_free_pages(__be64 *addr, 2617bbb845c4SAlexey Kardashevskiy unsigned long size, unsigned level) 2618bbb845c4SAlexey Kardashevskiy { 2619bbb845c4SAlexey Kardashevskiy const unsigned long addr_ul = (unsigned long) addr & 2620bbb845c4SAlexey Kardashevskiy ~(TCE_PCI_READ | TCE_PCI_WRITE); 2621bbb845c4SAlexey Kardashevskiy 2622bbb845c4SAlexey Kardashevskiy if (level) { 2623bbb845c4SAlexey Kardashevskiy long i; 2624bbb845c4SAlexey Kardashevskiy u64 *tmp = (u64 *) addr_ul; 2625bbb845c4SAlexey Kardashevskiy 2626bbb845c4SAlexey Kardashevskiy for (i = 0; i < size; ++i) { 2627bbb845c4SAlexey Kardashevskiy unsigned long hpa = be64_to_cpu(tmp[i]); 2628bbb845c4SAlexey Kardashevskiy 2629bbb845c4SAlexey Kardashevskiy if (!(hpa & (TCE_PCI_READ | TCE_PCI_WRITE))) 2630bbb845c4SAlexey Kardashevskiy continue; 2631bbb845c4SAlexey Kardashevskiy 2632bbb845c4SAlexey Kardashevskiy pnv_pci_ioda2_table_do_free_pages(__va(hpa), size, 2633bbb845c4SAlexey Kardashevskiy level - 1); 2634bbb845c4SAlexey Kardashevskiy } 2635bbb845c4SAlexey Kardashevskiy } 2636bbb845c4SAlexey Kardashevskiy 2637bbb845c4SAlexey Kardashevskiy free_pages(addr_ul, get_order(size << 3)); 2638bbb845c4SAlexey Kardashevskiy } 2639bbb845c4SAlexey Kardashevskiy 2640aca6913fSAlexey Kardashevskiy static void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl) 2641aca6913fSAlexey Kardashevskiy { 2642bbb845c4SAlexey Kardashevskiy const unsigned long size = tbl->it_indirect_levels ? 2643bbb845c4SAlexey Kardashevskiy tbl->it_level_size : tbl->it_size; 2644bbb845c4SAlexey Kardashevskiy 2645aca6913fSAlexey Kardashevskiy if (!tbl->it_size) 2646aca6913fSAlexey Kardashevskiy return; 2647aca6913fSAlexey Kardashevskiy 2648bbb845c4SAlexey Kardashevskiy pnv_pci_ioda2_table_do_free_pages((__be64 *)tbl->it_base, size, 2649bbb845c4SAlexey Kardashevskiy tbl->it_indirect_levels); 2650aca6913fSAlexey Kardashevskiy } 2651aca6913fSAlexey Kardashevskiy 2652373f5657SGavin Shan static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, 2653373f5657SGavin Shan struct pnv_ioda_pe *pe) 2654373f5657SGavin Shan { 2655373f5657SGavin Shan int64_t rc; 2656373f5657SGavin Shan 2657f87a8864SAlexey Kardashevskiy /* TVE #1 is selected by PCI address bit 59 */ 2658f87a8864SAlexey Kardashevskiy pe->tce_bypass_base = 1ull << 59; 2659f87a8864SAlexey Kardashevskiy 2660b348aa65SAlexey Kardashevskiy iommu_register_group(&pe->table_group, phb->hose->global_number, 2661b348aa65SAlexey Kardashevskiy pe->pe_number); 2662c5773822SAlexey Kardashevskiy 2663373f5657SGavin Shan /* The PE will reserve all possible 32-bits space */ 2664373f5657SGavin Shan pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n", 2665aca6913fSAlexey Kardashevskiy phb->ioda.m32_pci_base); 2666373f5657SGavin Shan 2667e5aad1e6SAlexey Kardashevskiy /* Setup linux iommu table */ 26684793d65dSAlexey Kardashevskiy pe->table_group.tce32_start = 0; 26694793d65dSAlexey Kardashevskiy pe->table_group.tce32_size = phb->ioda.m32_pci_base; 26704793d65dSAlexey Kardashevskiy pe->table_group.max_dynamic_windows_supported = 26714793d65dSAlexey Kardashevskiy IOMMU_TABLE_GROUP_MAX_TABLES; 26724793d65dSAlexey Kardashevskiy pe->table_group.max_levels = POWERNV_IOMMU_MAX_LEVELS; 26734793d65dSAlexey Kardashevskiy pe->table_group.pgsizes = SZ_4K | SZ_64K | SZ_16M; 2674e5aad1e6SAlexey Kardashevskiy #ifdef CONFIG_IOMMU_API 2675e5aad1e6SAlexey Kardashevskiy pe->table_group.ops = &pnv_pci_ioda2_ops; 2676e5aad1e6SAlexey Kardashevskiy #endif 2677e5aad1e6SAlexey Kardashevskiy 267846d3e1e1SAlexey Kardashevskiy rc = pnv_pci_ioda2_setup_default_config(pe); 2679801846d1SGavin Shan if (rc) 268046d3e1e1SAlexey Kardashevskiy return; 268146d3e1e1SAlexey Kardashevskiy 268246d3e1e1SAlexey Kardashevskiy if (pe->flags & PNV_IODA_PE_DEV) 268346d3e1e1SAlexey Kardashevskiy iommu_add_device(&pe->pdev->dev); 268446d3e1e1SAlexey Kardashevskiy else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) 268546d3e1e1SAlexey Kardashevskiy pnv_ioda_setup_bus_dma(pe, pe->pbus); 2686373f5657SGavin Shan } 2687373f5657SGavin Shan 2688cad5cef6SGreg Kroah-Hartman static void pnv_ioda_setup_dma(struct pnv_phb *phb) 2689184cd4a3SBenjamin Herrenschmidt { 2690184cd4a3SBenjamin Herrenschmidt struct pci_controller *hose = phb->hose; 2691184cd4a3SBenjamin Herrenschmidt struct pnv_ioda_pe *pe; 26922b923ed1SGavin Shan unsigned int weight; 2693801846d1SGavin Shan 2694184cd4a3SBenjamin Herrenschmidt /* If we have more PE# than segments available, hand out one 2695184cd4a3SBenjamin Herrenschmidt * per PE until we run out and let the rest fail. If not, 2696184cd4a3SBenjamin Herrenschmidt * then we assign at least one segment per PE, plus more based 2697184cd4a3SBenjamin Herrenschmidt * on the amount of devices under that PE 2698184cd4a3SBenjamin Herrenschmidt */ 26992b923ed1SGavin Shan pr_info("PCI: Domain %04x has %d available 32-bit DMA segments\n", 27002b923ed1SGavin Shan hose->global_number, phb->ioda.dma32_count); 2701184cd4a3SBenjamin Herrenschmidt 27025780fb04SAlexey Kardashevskiy pnv_pci_ioda_setup_opal_tce_kill(phb); 27035780fb04SAlexey Kardashevskiy 27042b923ed1SGavin Shan /* Walk our PE list and configure their DMA segments */ 2705801846d1SGavin Shan list_for_each_entry(pe, &phb->ioda.pe_list, list) { 2706801846d1SGavin Shan weight = pnv_pci_ioda_pe_dma_weight(pe); 2707801846d1SGavin Shan if (!weight) 2708184cd4a3SBenjamin Herrenschmidt continue; 2709801846d1SGavin Shan 2710373f5657SGavin Shan /* 2711373f5657SGavin Shan * For IODA2 compliant PHB3, we needn't care about the weight. 2712373f5657SGavin Shan * The all available 32-bits DMA space will be assigned to 2713373f5657SGavin Shan * the specific PE. 2714373f5657SGavin Shan */ 2715373f5657SGavin Shan if (phb->type == PNV_PHB_IODA1) { 27162b923ed1SGavin Shan pnv_pci_ioda1_setup_dma_pe(phb, pe); 27175d2aa710SAlistair Popple } else if (phb->type == PNV_PHB_IODA2) { 2718373f5657SGavin Shan pe_info(pe, "Assign DMA32 space\n"); 2719373f5657SGavin Shan pnv_pci_ioda2_setup_dma_pe(phb, pe); 27205d2aa710SAlistair Popple } else if (phb->type == PNV_PHB_NPU) { 27215d2aa710SAlistair Popple /* 27225d2aa710SAlistair Popple * We initialise the DMA space for an NPU PHB 27235d2aa710SAlistair Popple * after setup of the PHB is complete as we 27245d2aa710SAlistair Popple * point the NPU TVT to the the same location 27255d2aa710SAlistair Popple * as the PHB3 TVT. 27265d2aa710SAlistair Popple */ 2727373f5657SGavin Shan } 2728184cd4a3SBenjamin Herrenschmidt } 2729184cd4a3SBenjamin Herrenschmidt } 2730184cd4a3SBenjamin Herrenschmidt 2731184cd4a3SBenjamin Herrenschmidt #ifdef CONFIG_PCI_MSI 2732137436c9SGavin Shan static void pnv_ioda2_msi_eoi(struct irq_data *d) 2733137436c9SGavin Shan { 2734137436c9SGavin Shan unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); 2735137436c9SGavin Shan struct irq_chip *chip = irq_data_get_irq_chip(d); 2736137436c9SGavin Shan struct pnv_phb *phb = container_of(chip, struct pnv_phb, 2737137436c9SGavin Shan ioda.irq_chip); 2738137436c9SGavin Shan int64_t rc; 2739137436c9SGavin Shan 2740137436c9SGavin Shan rc = opal_pci_msi_eoi(phb->opal_id, hw_irq); 2741137436c9SGavin Shan WARN_ON_ONCE(rc); 2742137436c9SGavin Shan 2743137436c9SGavin Shan icp_native_eoi(d); 2744137436c9SGavin Shan } 2745137436c9SGavin Shan 2746fd9a1c26SIan Munsie 2747fd9a1c26SIan Munsie static void set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq) 2748fd9a1c26SIan Munsie { 2749fd9a1c26SIan Munsie struct irq_data *idata; 2750fd9a1c26SIan Munsie struct irq_chip *ichip; 2751fd9a1c26SIan Munsie 2752fd9a1c26SIan Munsie if (phb->type != PNV_PHB_IODA2) 2753fd9a1c26SIan Munsie return; 2754fd9a1c26SIan Munsie 2755fd9a1c26SIan Munsie if (!phb->ioda.irq_chip_init) { 2756fd9a1c26SIan Munsie /* 2757fd9a1c26SIan Munsie * First time we setup an MSI IRQ, we need to setup the 2758fd9a1c26SIan Munsie * corresponding IRQ chip to route correctly. 2759fd9a1c26SIan Munsie */ 2760fd9a1c26SIan Munsie idata = irq_get_irq_data(virq); 2761fd9a1c26SIan Munsie ichip = irq_data_get_irq_chip(idata); 2762fd9a1c26SIan Munsie phb->ioda.irq_chip_init = 1; 2763fd9a1c26SIan Munsie phb->ioda.irq_chip = *ichip; 2764fd9a1c26SIan Munsie phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi; 2765fd9a1c26SIan Munsie } 2766fd9a1c26SIan Munsie irq_set_chip(virq, &phb->ioda.irq_chip); 2767fd9a1c26SIan Munsie } 2768fd9a1c26SIan Munsie 276980c49c7eSIan Munsie #ifdef CONFIG_CXL_BASE 277080c49c7eSIan Munsie 27716f963ec2SRyan Grimm struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev) 277280c49c7eSIan Munsie { 277380c49c7eSIan Munsie struct pci_controller *hose = pci_bus_to_host(dev->bus); 277480c49c7eSIan Munsie 27756f963ec2SRyan Grimm return of_node_get(hose->dn); 277680c49c7eSIan Munsie } 27776f963ec2SRyan Grimm EXPORT_SYMBOL(pnv_pci_get_phb_node); 277880c49c7eSIan Munsie 27791212aa1cSRyan Grimm int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode) 278080c49c7eSIan Munsie { 278180c49c7eSIan Munsie struct pci_controller *hose = pci_bus_to_host(dev->bus); 278280c49c7eSIan Munsie struct pnv_phb *phb = hose->private_data; 278380c49c7eSIan Munsie struct pnv_ioda_pe *pe; 278480c49c7eSIan Munsie int rc; 278580c49c7eSIan Munsie 278680c49c7eSIan Munsie pe = pnv_ioda_get_pe(dev); 278780c49c7eSIan Munsie if (!pe) 278880c49c7eSIan Munsie return -ENODEV; 278980c49c7eSIan Munsie 279080c49c7eSIan Munsie pe_info(pe, "Switching PHB to CXL\n"); 279180c49c7eSIan Munsie 27921212aa1cSRyan Grimm rc = opal_pci_set_phb_cxl_mode(phb->opal_id, mode, pe->pe_number); 279380c49c7eSIan Munsie if (rc) 279480c49c7eSIan Munsie dev_err(&dev->dev, "opal_pci_set_phb_cxl_mode failed: %i\n", rc); 279580c49c7eSIan Munsie 279680c49c7eSIan Munsie return rc; 279780c49c7eSIan Munsie } 27981212aa1cSRyan Grimm EXPORT_SYMBOL(pnv_phb_to_cxl_mode); 279980c49c7eSIan Munsie 280080c49c7eSIan Munsie /* Find PHB for cxl dev and allocate MSI hwirqs? 280180c49c7eSIan Munsie * Returns the absolute hardware IRQ number 280280c49c7eSIan Munsie */ 280380c49c7eSIan Munsie int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num) 280480c49c7eSIan Munsie { 280580c49c7eSIan Munsie struct pci_controller *hose = pci_bus_to_host(dev->bus); 280680c49c7eSIan Munsie struct pnv_phb *phb = hose->private_data; 280780c49c7eSIan Munsie int hwirq = msi_bitmap_alloc_hwirqs(&phb->msi_bmp, num); 280880c49c7eSIan Munsie 280980c49c7eSIan Munsie if (hwirq < 0) { 281080c49c7eSIan Munsie dev_warn(&dev->dev, "Failed to find a free MSI\n"); 281180c49c7eSIan Munsie return -ENOSPC; 281280c49c7eSIan Munsie } 281380c49c7eSIan Munsie 281480c49c7eSIan Munsie return phb->msi_base + hwirq; 281580c49c7eSIan Munsie } 281680c49c7eSIan Munsie EXPORT_SYMBOL(pnv_cxl_alloc_hwirqs); 281780c49c7eSIan Munsie 281880c49c7eSIan Munsie void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num) 281980c49c7eSIan Munsie { 282080c49c7eSIan Munsie struct pci_controller *hose = pci_bus_to_host(dev->bus); 282180c49c7eSIan Munsie struct pnv_phb *phb = hose->private_data; 282280c49c7eSIan Munsie 282380c49c7eSIan Munsie msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq - phb->msi_base, num); 282480c49c7eSIan Munsie } 282580c49c7eSIan Munsie EXPORT_SYMBOL(pnv_cxl_release_hwirqs); 282680c49c7eSIan Munsie 282780c49c7eSIan Munsie void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs, 282880c49c7eSIan Munsie struct pci_dev *dev) 282980c49c7eSIan Munsie { 283080c49c7eSIan Munsie struct pci_controller *hose = pci_bus_to_host(dev->bus); 283180c49c7eSIan Munsie struct pnv_phb *phb = hose->private_data; 283280c49c7eSIan Munsie int i, hwirq; 283380c49c7eSIan Munsie 283480c49c7eSIan Munsie for (i = 1; i < CXL_IRQ_RANGES; i++) { 283580c49c7eSIan Munsie if (!irqs->range[i]) 283680c49c7eSIan Munsie continue; 283780c49c7eSIan Munsie pr_devel("cxl release irq range 0x%x: offset: 0x%lx limit: %ld\n", 283880c49c7eSIan Munsie i, irqs->offset[i], 283980c49c7eSIan Munsie irqs->range[i]); 284080c49c7eSIan Munsie hwirq = irqs->offset[i] - phb->msi_base; 284180c49c7eSIan Munsie msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq, 284280c49c7eSIan Munsie irqs->range[i]); 284380c49c7eSIan Munsie } 284480c49c7eSIan Munsie } 284580c49c7eSIan Munsie EXPORT_SYMBOL(pnv_cxl_release_hwirq_ranges); 284680c49c7eSIan Munsie 284780c49c7eSIan Munsie int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs, 284880c49c7eSIan Munsie struct pci_dev *dev, int num) 284980c49c7eSIan Munsie { 285080c49c7eSIan Munsie struct pci_controller *hose = pci_bus_to_host(dev->bus); 285180c49c7eSIan Munsie struct pnv_phb *phb = hose->private_data; 285280c49c7eSIan Munsie int i, hwirq, try; 285380c49c7eSIan Munsie 285480c49c7eSIan Munsie memset(irqs, 0, sizeof(struct cxl_irq_ranges)); 285580c49c7eSIan Munsie 285680c49c7eSIan Munsie /* 0 is reserved for the multiplexed PSL DSI interrupt */ 285780c49c7eSIan Munsie for (i = 1; i < CXL_IRQ_RANGES && num; i++) { 285880c49c7eSIan Munsie try = num; 285980c49c7eSIan Munsie while (try) { 286080c49c7eSIan Munsie hwirq = msi_bitmap_alloc_hwirqs(&phb->msi_bmp, try); 286180c49c7eSIan Munsie if (hwirq >= 0) 286280c49c7eSIan Munsie break; 286380c49c7eSIan Munsie try /= 2; 286480c49c7eSIan Munsie } 286580c49c7eSIan Munsie if (!try) 286680c49c7eSIan Munsie goto fail; 286780c49c7eSIan Munsie 286880c49c7eSIan Munsie irqs->offset[i] = phb->msi_base + hwirq; 286980c49c7eSIan Munsie irqs->range[i] = try; 287080c49c7eSIan Munsie pr_devel("cxl alloc irq range 0x%x: offset: 0x%lx limit: %li\n", 287180c49c7eSIan Munsie i, irqs->offset[i], irqs->range[i]); 287280c49c7eSIan Munsie num -= try; 287380c49c7eSIan Munsie } 287480c49c7eSIan Munsie if (num) 287580c49c7eSIan Munsie goto fail; 287680c49c7eSIan Munsie 287780c49c7eSIan Munsie return 0; 287880c49c7eSIan Munsie fail: 287980c49c7eSIan Munsie pnv_cxl_release_hwirq_ranges(irqs, dev); 288080c49c7eSIan Munsie return -ENOSPC; 288180c49c7eSIan Munsie } 288280c49c7eSIan Munsie EXPORT_SYMBOL(pnv_cxl_alloc_hwirq_ranges); 288380c49c7eSIan Munsie 288480c49c7eSIan Munsie int pnv_cxl_get_irq_count(struct pci_dev *dev) 288580c49c7eSIan Munsie { 288680c49c7eSIan Munsie struct pci_controller *hose = pci_bus_to_host(dev->bus); 288780c49c7eSIan Munsie struct pnv_phb *phb = hose->private_data; 288880c49c7eSIan Munsie 288980c49c7eSIan Munsie return phb->msi_bmp.irq_count; 289080c49c7eSIan Munsie } 289180c49c7eSIan Munsie EXPORT_SYMBOL(pnv_cxl_get_irq_count); 289280c49c7eSIan Munsie 289380c49c7eSIan Munsie int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq, 289480c49c7eSIan Munsie unsigned int virq) 289580c49c7eSIan Munsie { 289680c49c7eSIan Munsie struct pci_controller *hose = pci_bus_to_host(dev->bus); 289780c49c7eSIan Munsie struct pnv_phb *phb = hose->private_data; 289880c49c7eSIan Munsie unsigned int xive_num = hwirq - phb->msi_base; 289980c49c7eSIan Munsie struct pnv_ioda_pe *pe; 290080c49c7eSIan Munsie int rc; 290180c49c7eSIan Munsie 290280c49c7eSIan Munsie if (!(pe = pnv_ioda_get_pe(dev))) 290380c49c7eSIan Munsie return -ENODEV; 290480c49c7eSIan Munsie 290580c49c7eSIan Munsie /* Assign XIVE to PE */ 290680c49c7eSIan Munsie rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); 290780c49c7eSIan Munsie if (rc) { 290880c49c7eSIan Munsie pe_warn(pe, "%s: OPAL error %d setting msi_base 0x%x " 290980c49c7eSIan Munsie "hwirq 0x%x XIVE 0x%x PE\n", 291080c49c7eSIan Munsie pci_name(dev), rc, phb->msi_base, hwirq, xive_num); 291180c49c7eSIan Munsie return -EIO; 291280c49c7eSIan Munsie } 291380c49c7eSIan Munsie set_msi_irq_chip(phb, virq); 291480c49c7eSIan Munsie 291580c49c7eSIan Munsie return 0; 291680c49c7eSIan Munsie } 291780c49c7eSIan Munsie EXPORT_SYMBOL(pnv_cxl_ioda_msi_setup); 291880c49c7eSIan Munsie #endif 291980c49c7eSIan Munsie 2920184cd4a3SBenjamin Herrenschmidt static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, 2921137436c9SGavin Shan unsigned int hwirq, unsigned int virq, 2922137436c9SGavin Shan unsigned int is_64, struct msi_msg *msg) 2923184cd4a3SBenjamin Herrenschmidt { 2924184cd4a3SBenjamin Herrenschmidt struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev); 2925184cd4a3SBenjamin Herrenschmidt unsigned int xive_num = hwirq - phb->msi_base; 29263a1a4661SBenjamin Herrenschmidt __be32 data; 2927184cd4a3SBenjamin Herrenschmidt int rc; 2928184cd4a3SBenjamin Herrenschmidt 2929184cd4a3SBenjamin Herrenschmidt /* No PE assigned ? bail out ... no MSI for you ! */ 2930184cd4a3SBenjamin Herrenschmidt if (pe == NULL) 2931184cd4a3SBenjamin Herrenschmidt return -ENXIO; 2932184cd4a3SBenjamin Herrenschmidt 2933184cd4a3SBenjamin Herrenschmidt /* Check if we have an MVE */ 2934184cd4a3SBenjamin Herrenschmidt if (pe->mve_number < 0) 2935184cd4a3SBenjamin Herrenschmidt return -ENXIO; 2936184cd4a3SBenjamin Herrenschmidt 2937b72c1f65SBenjamin Herrenschmidt /* Force 32-bit MSI on some broken devices */ 293836074381SBenjamin Herrenschmidt if (dev->no_64bit_msi) 2939b72c1f65SBenjamin Herrenschmidt is_64 = 0; 2940b72c1f65SBenjamin Herrenschmidt 2941184cd4a3SBenjamin Herrenschmidt /* Assign XIVE to PE */ 2942184cd4a3SBenjamin Herrenschmidt rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); 2943184cd4a3SBenjamin Herrenschmidt if (rc) { 2944184cd4a3SBenjamin Herrenschmidt pr_warn("%s: OPAL error %d setting XIVE %d PE\n", 2945184cd4a3SBenjamin Herrenschmidt pci_name(dev), rc, xive_num); 2946184cd4a3SBenjamin Herrenschmidt return -EIO; 2947184cd4a3SBenjamin Herrenschmidt } 2948184cd4a3SBenjamin Herrenschmidt 2949184cd4a3SBenjamin Herrenschmidt if (is_64) { 29503a1a4661SBenjamin Herrenschmidt __be64 addr64; 29513a1a4661SBenjamin Herrenschmidt 2952184cd4a3SBenjamin Herrenschmidt rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1, 2953184cd4a3SBenjamin Herrenschmidt &addr64, &data); 2954184cd4a3SBenjamin Herrenschmidt if (rc) { 2955184cd4a3SBenjamin Herrenschmidt pr_warn("%s: OPAL error %d getting 64-bit MSI data\n", 2956184cd4a3SBenjamin Herrenschmidt pci_name(dev), rc); 2957184cd4a3SBenjamin Herrenschmidt return -EIO; 2958184cd4a3SBenjamin Herrenschmidt } 29593a1a4661SBenjamin Herrenschmidt msg->address_hi = be64_to_cpu(addr64) >> 32; 29603a1a4661SBenjamin Herrenschmidt msg->address_lo = be64_to_cpu(addr64) & 0xfffffffful; 2961184cd4a3SBenjamin Herrenschmidt } else { 29623a1a4661SBenjamin Herrenschmidt __be32 addr32; 29633a1a4661SBenjamin Herrenschmidt 2964184cd4a3SBenjamin Herrenschmidt rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1, 2965184cd4a3SBenjamin Herrenschmidt &addr32, &data); 2966184cd4a3SBenjamin Herrenschmidt if (rc) { 2967184cd4a3SBenjamin Herrenschmidt pr_warn("%s: OPAL error %d getting 32-bit MSI data\n", 2968184cd4a3SBenjamin Herrenschmidt pci_name(dev), rc); 2969184cd4a3SBenjamin Herrenschmidt return -EIO; 2970184cd4a3SBenjamin Herrenschmidt } 2971184cd4a3SBenjamin Herrenschmidt msg->address_hi = 0; 29723a1a4661SBenjamin Herrenschmidt msg->address_lo = be32_to_cpu(addr32); 2973184cd4a3SBenjamin Herrenschmidt } 29743a1a4661SBenjamin Herrenschmidt msg->data = be32_to_cpu(data); 2975184cd4a3SBenjamin Herrenschmidt 2976fd9a1c26SIan Munsie set_msi_irq_chip(phb, virq); 2977137436c9SGavin Shan 2978184cd4a3SBenjamin Herrenschmidt pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d)," 2979184cd4a3SBenjamin Herrenschmidt " address=%x_%08x data=%x PE# %d\n", 2980184cd4a3SBenjamin Herrenschmidt pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num, 2981184cd4a3SBenjamin Herrenschmidt msg->address_hi, msg->address_lo, data, pe->pe_number); 2982184cd4a3SBenjamin Herrenschmidt 2983184cd4a3SBenjamin Herrenschmidt return 0; 2984184cd4a3SBenjamin Herrenschmidt } 2985184cd4a3SBenjamin Herrenschmidt 2986184cd4a3SBenjamin Herrenschmidt static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) 2987184cd4a3SBenjamin Herrenschmidt { 2988fb1b55d6SGavin Shan unsigned int count; 2989184cd4a3SBenjamin Herrenschmidt const __be32 *prop = of_get_property(phb->hose->dn, 2990184cd4a3SBenjamin Herrenschmidt "ibm,opal-msi-ranges", NULL); 2991184cd4a3SBenjamin Herrenschmidt if (!prop) { 2992184cd4a3SBenjamin Herrenschmidt /* BML Fallback */ 2993184cd4a3SBenjamin Herrenschmidt prop = of_get_property(phb->hose->dn, "msi-ranges", NULL); 2994184cd4a3SBenjamin Herrenschmidt } 2995184cd4a3SBenjamin Herrenschmidt if (!prop) 2996184cd4a3SBenjamin Herrenschmidt return; 2997184cd4a3SBenjamin Herrenschmidt 2998184cd4a3SBenjamin Herrenschmidt phb->msi_base = be32_to_cpup(prop); 2999fb1b55d6SGavin Shan count = be32_to_cpup(prop + 1); 3000fb1b55d6SGavin Shan if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) { 3001184cd4a3SBenjamin Herrenschmidt pr_err("PCI %d: Failed to allocate MSI bitmap !\n", 3002184cd4a3SBenjamin Herrenschmidt phb->hose->global_number); 3003184cd4a3SBenjamin Herrenschmidt return; 3004184cd4a3SBenjamin Herrenschmidt } 3005fb1b55d6SGavin Shan 3006184cd4a3SBenjamin Herrenschmidt phb->msi_setup = pnv_pci_ioda_msi_setup; 3007184cd4a3SBenjamin Herrenschmidt phb->msi32_support = 1; 3008184cd4a3SBenjamin Herrenschmidt pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n", 3009fb1b55d6SGavin Shan count, phb->msi_base); 3010184cd4a3SBenjamin Herrenschmidt } 3011184cd4a3SBenjamin Herrenschmidt #else 3012184cd4a3SBenjamin Herrenschmidt static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { } 3013184cd4a3SBenjamin Herrenschmidt #endif /* CONFIG_PCI_MSI */ 3014184cd4a3SBenjamin Herrenschmidt 30156e628c7dSWei Yang #ifdef CONFIG_PCI_IOV 30166e628c7dSWei Yang static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev) 30176e628c7dSWei Yang { 3018f2dd0afeSWei Yang struct pci_controller *hose = pci_bus_to_host(pdev->bus); 3019f2dd0afeSWei Yang struct pnv_phb *phb = hose->private_data; 3020f2dd0afeSWei Yang const resource_size_t gate = phb->ioda.m64_segsize >> 2; 30216e628c7dSWei Yang struct resource *res; 30226e628c7dSWei Yang int i; 3023dfcc8d45SWei Yang resource_size_t size, total_vf_bar_sz; 30246e628c7dSWei Yang struct pci_dn *pdn; 30255b88ec22SWei Yang int mul, total_vfs; 30266e628c7dSWei Yang 30276e628c7dSWei Yang if (!pdev->is_physfn || pdev->is_added) 30286e628c7dSWei Yang return; 30296e628c7dSWei Yang 30306e628c7dSWei Yang pdn = pci_get_pdn(pdev); 30316e628c7dSWei Yang pdn->vfs_expanded = 0; 3032ee8222feSWei Yang pdn->m64_single_mode = false; 30336e628c7dSWei Yang 30345b88ec22SWei Yang total_vfs = pci_sriov_get_totalvfs(pdev); 303592b8f137SGavin Shan mul = phb->ioda.total_pe_num; 3036dfcc8d45SWei Yang total_vf_bar_sz = 0; 30375b88ec22SWei Yang 30385b88ec22SWei Yang for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { 30395b88ec22SWei Yang res = &pdev->resource[i + PCI_IOV_RESOURCES]; 30405b88ec22SWei Yang if (!res->flags || res->parent) 30415b88ec22SWei Yang continue; 30425b88ec22SWei Yang if (!pnv_pci_is_mem_pref_64(res->flags)) { 3043b0331854SWei Yang dev_warn(&pdev->dev, "Don't support SR-IOV with" 3044b0331854SWei Yang " non M64 VF BAR%d: %pR. \n", 30455b88ec22SWei Yang i, res); 3046b0331854SWei Yang goto truncate_iov; 30475b88ec22SWei Yang } 30485b88ec22SWei Yang 3049dfcc8d45SWei Yang total_vf_bar_sz += pci_iov_resource_size(pdev, 3050dfcc8d45SWei Yang i + PCI_IOV_RESOURCES); 30515b88ec22SWei Yang 3052f2dd0afeSWei Yang /* 3053f2dd0afeSWei Yang * If bigger than quarter of M64 segment size, just round up 3054f2dd0afeSWei Yang * power of two. 3055f2dd0afeSWei Yang * 3056f2dd0afeSWei Yang * Generally, one M64 BAR maps one IOV BAR. To avoid conflict 3057f2dd0afeSWei Yang * with other devices, IOV BAR size is expanded to be 3058f2dd0afeSWei Yang * (total_pe * VF_BAR_size). When VF_BAR_size is half of M64 3059f2dd0afeSWei Yang * segment size , the expanded size would equal to half of the 3060f2dd0afeSWei Yang * whole M64 space size, which will exhaust the M64 Space and 3061f2dd0afeSWei Yang * limit the system flexibility. This is a design decision to 3062f2dd0afeSWei Yang * set the boundary to quarter of the M64 segment size. 3063f2dd0afeSWei Yang */ 3064dfcc8d45SWei Yang if (total_vf_bar_sz > gate) { 30655b88ec22SWei Yang mul = roundup_pow_of_two(total_vfs); 3066dfcc8d45SWei Yang dev_info(&pdev->dev, 3067dfcc8d45SWei Yang "VF BAR Total IOV size %llx > %llx, roundup to %d VFs\n", 3068dfcc8d45SWei Yang total_vf_bar_sz, gate, mul); 3069ee8222feSWei Yang pdn->m64_single_mode = true; 30705b88ec22SWei Yang break; 30715b88ec22SWei Yang } 30725b88ec22SWei Yang } 30735b88ec22SWei Yang 30746e628c7dSWei Yang for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { 30756e628c7dSWei Yang res = &pdev->resource[i + PCI_IOV_RESOURCES]; 30766e628c7dSWei Yang if (!res->flags || res->parent) 30776e628c7dSWei Yang continue; 30786e628c7dSWei Yang 30796e628c7dSWei Yang size = pci_iov_resource_size(pdev, i + PCI_IOV_RESOURCES); 3080ee8222feSWei Yang /* 3081ee8222feSWei Yang * On PHB3, the minimum size alignment of M64 BAR in single 3082ee8222feSWei Yang * mode is 32MB. 3083ee8222feSWei Yang */ 3084ee8222feSWei Yang if (pdn->m64_single_mode && (size < SZ_32M)) 3085ee8222feSWei Yang goto truncate_iov; 3086ee8222feSWei Yang dev_dbg(&pdev->dev, " Fixing VF BAR%d: %pR to\n", i, res); 30875b88ec22SWei Yang res->end = res->start + size * mul - 1; 30886e628c7dSWei Yang dev_dbg(&pdev->dev, " %pR\n", res); 30896e628c7dSWei Yang dev_info(&pdev->dev, "VF BAR%d: %pR (expanded to %d VFs for PE alignment)", 30905b88ec22SWei Yang i, res, mul); 30916e628c7dSWei Yang } 30925b88ec22SWei Yang pdn->vfs_expanded = mul; 3093b0331854SWei Yang 3094b0331854SWei Yang return; 3095b0331854SWei Yang 3096b0331854SWei Yang truncate_iov: 3097b0331854SWei Yang /* To save MMIO space, IOV BAR is truncated. */ 3098b0331854SWei Yang for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { 3099b0331854SWei Yang res = &pdev->resource[i + PCI_IOV_RESOURCES]; 3100b0331854SWei Yang res->flags = 0; 3101b0331854SWei Yang res->end = res->start - 1; 3102b0331854SWei Yang } 31036e628c7dSWei Yang } 31046e628c7dSWei Yang #endif /* CONFIG_PCI_IOV */ 31056e628c7dSWei Yang 310623e79425SGavin Shan static void pnv_ioda_setup_pe_res(struct pnv_ioda_pe *pe, 310723e79425SGavin Shan struct resource *res) 310811685becSGavin Shan { 310923e79425SGavin Shan struct pnv_phb *phb = pe->phb; 311011685becSGavin Shan struct pci_bus_region region; 311123e79425SGavin Shan int index; 311223e79425SGavin Shan int64_t rc; 311311685becSGavin Shan 311423e79425SGavin Shan if (!res || !res->flags || res->start > res->end) 311523e79425SGavin Shan return; 311611685becSGavin Shan 311711685becSGavin Shan if (res->flags & IORESOURCE_IO) { 311811685becSGavin Shan region.start = res->start - phb->ioda.io_pci_base; 311911685becSGavin Shan region.end = res->end - phb->ioda.io_pci_base; 312011685becSGavin Shan index = region.start / phb->ioda.io_segsize; 312111685becSGavin Shan 312292b8f137SGavin Shan while (index < phb->ioda.total_pe_num && 312311685becSGavin Shan region.start <= region.end) { 312411685becSGavin Shan phb->ioda.io_segmap[index] = pe->pe_number; 312511685becSGavin Shan rc = opal_pci_map_pe_mmio_window(phb->opal_id, 312611685becSGavin Shan pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index); 312711685becSGavin Shan if (rc != OPAL_SUCCESS) { 312823e79425SGavin Shan pr_err("%s: Error %lld mapping IO segment#%d to PE#%d\n", 312911685becSGavin Shan __func__, rc, index, pe->pe_number); 313011685becSGavin Shan break; 313111685becSGavin Shan } 313211685becSGavin Shan 313311685becSGavin Shan region.start += phb->ioda.io_segsize; 313411685becSGavin Shan index++; 313511685becSGavin Shan } 3136027fa02fSGavin Shan } else if ((res->flags & IORESOURCE_MEM) && 3137027fa02fSGavin Shan !pnv_pci_is_mem_pref_64(res->flags)) { 313811685becSGavin Shan region.start = res->start - 313923e79425SGavin Shan phb->hose->mem_offset[0] - 314011685becSGavin Shan phb->ioda.m32_pci_base; 314111685becSGavin Shan region.end = res->end - 314223e79425SGavin Shan phb->hose->mem_offset[0] - 314311685becSGavin Shan phb->ioda.m32_pci_base; 314411685becSGavin Shan index = region.start / phb->ioda.m32_segsize; 314511685becSGavin Shan 314692b8f137SGavin Shan while (index < phb->ioda.total_pe_num && 314711685becSGavin Shan region.start <= region.end) { 314811685becSGavin Shan phb->ioda.m32_segmap[index] = pe->pe_number; 314911685becSGavin Shan rc = opal_pci_map_pe_mmio_window(phb->opal_id, 315011685becSGavin Shan pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index); 315111685becSGavin Shan if (rc != OPAL_SUCCESS) { 315223e79425SGavin Shan pr_err("%s: Error %lld mapping M32 segment#%d to PE#%d", 315311685becSGavin Shan __func__, rc, index, pe->pe_number); 315411685becSGavin Shan break; 315511685becSGavin Shan } 315611685becSGavin Shan 315711685becSGavin Shan region.start += phb->ioda.m32_segsize; 315811685becSGavin Shan index++; 315911685becSGavin Shan } 316011685becSGavin Shan } 316111685becSGavin Shan } 316223e79425SGavin Shan 316323e79425SGavin Shan /* 316423e79425SGavin Shan * This function is supposed to be called on basis of PE from top 316523e79425SGavin Shan * to bottom style. So the the I/O or MMIO segment assigned to 316623e79425SGavin Shan * parent PE could be overrided by its child PEs if necessary. 316723e79425SGavin Shan */ 316823e79425SGavin Shan static void pnv_ioda_setup_pe_seg(struct pnv_ioda_pe *pe) 316923e79425SGavin Shan { 317069d733e7SGavin Shan struct pci_dev *pdev; 317123e79425SGavin Shan int i; 317223e79425SGavin Shan 317323e79425SGavin Shan /* 317423e79425SGavin Shan * NOTE: We only care PCI bus based PE for now. For PCI 317523e79425SGavin Shan * device based PE, for example SRIOV sensitive VF should 317623e79425SGavin Shan * be figured out later. 317723e79425SGavin Shan */ 317823e79425SGavin Shan BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))); 317923e79425SGavin Shan 318069d733e7SGavin Shan list_for_each_entry(pdev, &pe->pbus->devices, bus_list) { 318169d733e7SGavin Shan for (i = 0; i <= PCI_ROM_RESOURCE; i++) 318269d733e7SGavin Shan pnv_ioda_setup_pe_res(pe, &pdev->resource[i]); 318369d733e7SGavin Shan 318469d733e7SGavin Shan /* 318569d733e7SGavin Shan * If the PE contains all subordinate PCI buses, the 318669d733e7SGavin Shan * windows of the child bridges should be mapped to 318769d733e7SGavin Shan * the PE as well. 318869d733e7SGavin Shan */ 318969d733e7SGavin Shan if (!(pe->flags & PNV_IODA_PE_BUS_ALL) || !pci_is_bridge(pdev)) 319069d733e7SGavin Shan continue; 319169d733e7SGavin Shan for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) 319269d733e7SGavin Shan pnv_ioda_setup_pe_res(pe, 319369d733e7SGavin Shan &pdev->resource[PCI_BRIDGE_RESOURCES + i]); 319469d733e7SGavin Shan } 319511685becSGavin Shan } 319611685becSGavin Shan 3197cad5cef6SGreg Kroah-Hartman static void pnv_pci_ioda_setup_seg(void) 319811685becSGavin Shan { 319911685becSGavin Shan struct pci_controller *tmp, *hose; 320011685becSGavin Shan struct pnv_phb *phb; 320111685becSGavin Shan struct pnv_ioda_pe *pe; 320211685becSGavin Shan 320311685becSGavin Shan list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { 320411685becSGavin Shan phb = hose->private_data; 32055d2aa710SAlistair Popple 32065d2aa710SAlistair Popple /* NPU PHB does not support IO or MMIO segmentation */ 32075d2aa710SAlistair Popple if (phb->type == PNV_PHB_NPU) 32085d2aa710SAlistair Popple continue; 32095d2aa710SAlistair Popple 321011685becSGavin Shan list_for_each_entry(pe, &phb->ioda.pe_list, list) { 321123e79425SGavin Shan pnv_ioda_setup_pe_seg(pe); 321211685becSGavin Shan } 321311685becSGavin Shan } 321411685becSGavin Shan } 321511685becSGavin Shan 3216cad5cef6SGreg Kroah-Hartman static void pnv_pci_ioda_setup_DMA(void) 321713395c48SGavin Shan { 321813395c48SGavin Shan struct pci_controller *hose, *tmp; 3219db1266c8SGavin Shan struct pnv_phb *phb; 322013395c48SGavin Shan 322113395c48SGavin Shan list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { 322213395c48SGavin Shan pnv_ioda_setup_dma(hose->private_data); 3223db1266c8SGavin Shan 3224db1266c8SGavin Shan /* Mark the PHB initialization done */ 3225db1266c8SGavin Shan phb = hose->private_data; 3226db1266c8SGavin Shan phb->initialized = 1; 322713395c48SGavin Shan } 3228b5cb9ab1SAlexey Kardashevskiy 3229b5cb9ab1SAlexey Kardashevskiy pnv_pci_ioda_setup_iommu_api(); 323013395c48SGavin Shan } 323113395c48SGavin Shan 323237c367f2SGavin Shan static void pnv_pci_ioda_create_dbgfs(void) 323337c367f2SGavin Shan { 323437c367f2SGavin Shan #ifdef CONFIG_DEBUG_FS 323537c367f2SGavin Shan struct pci_controller *hose, *tmp; 323637c367f2SGavin Shan struct pnv_phb *phb; 323737c367f2SGavin Shan char name[16]; 323837c367f2SGavin Shan 323937c367f2SGavin Shan list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { 324037c367f2SGavin Shan phb = hose->private_data; 324137c367f2SGavin Shan 324237c367f2SGavin Shan sprintf(name, "PCI%04x", hose->global_number); 324337c367f2SGavin Shan phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root); 324437c367f2SGavin Shan if (!phb->dbgfs) 324537c367f2SGavin Shan pr_warning("%s: Error on creating debugfs on PHB#%x\n", 324637c367f2SGavin Shan __func__, hose->global_number); 324737c367f2SGavin Shan } 324837c367f2SGavin Shan #endif /* CONFIG_DEBUG_FS */ 324937c367f2SGavin Shan } 325037c367f2SGavin Shan 3251cad5cef6SGreg Kroah-Hartman static void pnv_pci_ioda_fixup(void) 3252fb446ad0SGavin Shan { 3253fb446ad0SGavin Shan pnv_pci_ioda_setup_PEs(); 325411685becSGavin Shan pnv_pci_ioda_setup_seg(); 325513395c48SGavin Shan pnv_pci_ioda_setup_DMA(); 3256e9cc17d4SGavin Shan 325737c367f2SGavin Shan pnv_pci_ioda_create_dbgfs(); 325837c367f2SGavin Shan 3259e9cc17d4SGavin Shan #ifdef CONFIG_EEH 3260e9cc17d4SGavin Shan eeh_init(); 3261dadcd6d6SMike Qiu eeh_addr_cache_build(); 3262e9cc17d4SGavin Shan #endif 3263fb446ad0SGavin Shan } 3264fb446ad0SGavin Shan 3265271fd03aSGavin Shan /* 3266271fd03aSGavin Shan * Returns the alignment for I/O or memory windows for P2P 3267271fd03aSGavin Shan * bridges. That actually depends on how PEs are segmented. 3268271fd03aSGavin Shan * For now, we return I/O or M32 segment size for PE sensitive 3269271fd03aSGavin Shan * P2P bridges. Otherwise, the default values (4KiB for I/O, 3270271fd03aSGavin Shan * 1MiB for memory) will be returned. 3271271fd03aSGavin Shan * 3272271fd03aSGavin Shan * The current PCI bus might be put into one PE, which was 3273271fd03aSGavin Shan * create against the parent PCI bridge. For that case, we 3274271fd03aSGavin Shan * needn't enlarge the alignment so that we can save some 3275271fd03aSGavin Shan * resources. 3276271fd03aSGavin Shan */ 3277271fd03aSGavin Shan static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, 3278271fd03aSGavin Shan unsigned long type) 3279271fd03aSGavin Shan { 3280271fd03aSGavin Shan struct pci_dev *bridge; 3281271fd03aSGavin Shan struct pci_controller *hose = pci_bus_to_host(bus); 3282271fd03aSGavin Shan struct pnv_phb *phb = hose->private_data; 3283271fd03aSGavin Shan int num_pci_bridges = 0; 3284271fd03aSGavin Shan 3285271fd03aSGavin Shan bridge = bus->self; 3286271fd03aSGavin Shan while (bridge) { 3287271fd03aSGavin Shan if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) { 3288271fd03aSGavin Shan num_pci_bridges++; 3289271fd03aSGavin Shan if (num_pci_bridges >= 2) 3290271fd03aSGavin Shan return 1; 3291271fd03aSGavin Shan } 3292271fd03aSGavin Shan 3293271fd03aSGavin Shan bridge = bridge->bus->self; 3294271fd03aSGavin Shan } 3295271fd03aSGavin Shan 3296262af557SGuo Chao /* We fail back to M32 if M64 isn't supported */ 3297262af557SGuo Chao if (phb->ioda.m64_segsize && 3298262af557SGuo Chao pnv_pci_is_mem_pref_64(type)) 3299262af557SGuo Chao return phb->ioda.m64_segsize; 3300271fd03aSGavin Shan if (type & IORESOURCE_MEM) 3301271fd03aSGavin Shan return phb->ioda.m32_segsize; 3302271fd03aSGavin Shan 3303271fd03aSGavin Shan return phb->ioda.io_segsize; 3304271fd03aSGavin Shan } 3305271fd03aSGavin Shan 33065350ab3fSWei Yang #ifdef CONFIG_PCI_IOV 33075350ab3fSWei Yang static resource_size_t pnv_pci_iov_resource_alignment(struct pci_dev *pdev, 33085350ab3fSWei Yang int resno) 33095350ab3fSWei Yang { 3310ee8222feSWei Yang struct pci_controller *hose = pci_bus_to_host(pdev->bus); 3311ee8222feSWei Yang struct pnv_phb *phb = hose->private_data; 33125350ab3fSWei Yang struct pci_dn *pdn = pci_get_pdn(pdev); 33137fbe7a93SWei Yang resource_size_t align; 33145350ab3fSWei Yang 33157fbe7a93SWei Yang /* 33167fbe7a93SWei Yang * On PowerNV platform, IOV BAR is mapped by M64 BAR to enable the 33177fbe7a93SWei Yang * SR-IOV. While from hardware perspective, the range mapped by M64 33187fbe7a93SWei Yang * BAR should be size aligned. 33197fbe7a93SWei Yang * 3320ee8222feSWei Yang * When IOV BAR is mapped with M64 BAR in Single PE mode, the extra 3321ee8222feSWei Yang * powernv-specific hardware restriction is gone. But if just use the 3322ee8222feSWei Yang * VF BAR size as the alignment, PF BAR / VF BAR may be allocated with 3323ee8222feSWei Yang * in one segment of M64 #15, which introduces the PE conflict between 3324ee8222feSWei Yang * PF and VF. Based on this, the minimum alignment of an IOV BAR is 3325ee8222feSWei Yang * m64_segsize. 3326ee8222feSWei Yang * 33277fbe7a93SWei Yang * This function returns the total IOV BAR size if M64 BAR is in 33287fbe7a93SWei Yang * Shared PE mode or just VF BAR size if not. 3329ee8222feSWei Yang * If the M64 BAR is in Single PE mode, return the VF BAR size or 3330ee8222feSWei Yang * M64 segment size if IOV BAR size is less. 33317fbe7a93SWei Yang */ 33325350ab3fSWei Yang align = pci_iov_resource_size(pdev, resno); 33337fbe7a93SWei Yang if (!pdn->vfs_expanded) 33345350ab3fSWei Yang return align; 3335ee8222feSWei Yang if (pdn->m64_single_mode) 3336ee8222feSWei Yang return max(align, (resource_size_t)phb->ioda.m64_segsize); 33377fbe7a93SWei Yang 33387fbe7a93SWei Yang return pdn->vfs_expanded * align; 33395350ab3fSWei Yang } 33405350ab3fSWei Yang #endif /* CONFIG_PCI_IOV */ 33415350ab3fSWei Yang 3342184cd4a3SBenjamin Herrenschmidt /* Prevent enabling devices for which we couldn't properly 3343184cd4a3SBenjamin Herrenschmidt * assign a PE 3344184cd4a3SBenjamin Herrenschmidt */ 3345c88c2a18SDaniel Axtens static bool pnv_pci_enable_device_hook(struct pci_dev *dev) 3346184cd4a3SBenjamin Herrenschmidt { 3347db1266c8SGavin Shan struct pci_controller *hose = pci_bus_to_host(dev->bus); 3348db1266c8SGavin Shan struct pnv_phb *phb = hose->private_data; 3349db1266c8SGavin Shan struct pci_dn *pdn; 3350184cd4a3SBenjamin Herrenschmidt 3351db1266c8SGavin Shan /* The function is probably called while the PEs have 3352db1266c8SGavin Shan * not be created yet. For example, resource reassignment 3353db1266c8SGavin Shan * during PCI probe period. We just skip the check if 3354db1266c8SGavin Shan * PEs isn't ready. 3355db1266c8SGavin Shan */ 3356db1266c8SGavin Shan if (!phb->initialized) 3357c88c2a18SDaniel Axtens return true; 3358db1266c8SGavin Shan 3359b72c1f65SBenjamin Herrenschmidt pdn = pci_get_pdn(dev); 3360184cd4a3SBenjamin Herrenschmidt if (!pdn || pdn->pe_number == IODA_INVALID_PE) 3361c88c2a18SDaniel Axtens return false; 3362db1266c8SGavin Shan 3363c88c2a18SDaniel Axtens return true; 3364184cd4a3SBenjamin Herrenschmidt } 3365184cd4a3SBenjamin Herrenschmidt 33667a8e6bbfSMichael Neuling static void pnv_pci_ioda_shutdown(struct pci_controller *hose) 336773ed148aSBenjamin Herrenschmidt { 33687a8e6bbfSMichael Neuling struct pnv_phb *phb = hose->private_data; 33697a8e6bbfSMichael Neuling 3370d1a85eeeSGavin Shan opal_pci_reset(phb->opal_id, OPAL_RESET_PCI_IODA_TABLE, 337173ed148aSBenjamin Herrenschmidt OPAL_ASSERT_RESET); 337273ed148aSBenjamin Herrenschmidt } 337373ed148aSBenjamin Herrenschmidt 337492ae0353SDaniel Axtens static const struct pci_controller_ops pnv_pci_ioda_controller_ops = { 337592ae0353SDaniel Axtens .dma_dev_setup = pnv_pci_dma_dev_setup, 33761bc74f1cSGavin Shan .dma_bus_setup = pnv_pci_dma_bus_setup, 337792ae0353SDaniel Axtens #ifdef CONFIG_PCI_MSI 337892ae0353SDaniel Axtens .setup_msi_irqs = pnv_setup_msi_irqs, 337992ae0353SDaniel Axtens .teardown_msi_irqs = pnv_teardown_msi_irqs, 338092ae0353SDaniel Axtens #endif 338192ae0353SDaniel Axtens .enable_device_hook = pnv_pci_enable_device_hook, 338292ae0353SDaniel Axtens .window_alignment = pnv_pci_window_alignment, 338392ae0353SDaniel Axtens .reset_secondary_bus = pnv_pci_reset_secondary_bus, 3384763d2d8dSDaniel Axtens .dma_set_mask = pnv_pci_ioda_dma_set_mask, 338553522982SAndrew Donnellan .dma_get_required_mask = pnv_pci_ioda_dma_get_required_mask, 33867a8e6bbfSMichael Neuling .shutdown = pnv_pci_ioda_shutdown, 338792ae0353SDaniel Axtens }; 338892ae0353SDaniel Axtens 3389f9f83456SAlexey Kardashevskiy static int pnv_npu_dma_set_mask(struct pci_dev *npdev, u64 dma_mask) 3390f9f83456SAlexey Kardashevskiy { 3391f9f83456SAlexey Kardashevskiy dev_err_once(&npdev->dev, 3392f9f83456SAlexey Kardashevskiy "%s operation unsupported for NVLink devices\n", 3393f9f83456SAlexey Kardashevskiy __func__); 3394f9f83456SAlexey Kardashevskiy return -EPERM; 3395f9f83456SAlexey Kardashevskiy } 3396f9f83456SAlexey Kardashevskiy 33975d2aa710SAlistair Popple static const struct pci_controller_ops pnv_npu_ioda_controller_ops = { 33985d2aa710SAlistair Popple .dma_dev_setup = pnv_pci_dma_dev_setup, 33995d2aa710SAlistair Popple #ifdef CONFIG_PCI_MSI 34005d2aa710SAlistair Popple .setup_msi_irqs = pnv_setup_msi_irqs, 34015d2aa710SAlistair Popple .teardown_msi_irqs = pnv_teardown_msi_irqs, 34025d2aa710SAlistair Popple #endif 34035d2aa710SAlistair Popple .enable_device_hook = pnv_pci_enable_device_hook, 34045d2aa710SAlistair Popple .window_alignment = pnv_pci_window_alignment, 34055d2aa710SAlistair Popple .reset_secondary_bus = pnv_pci_reset_secondary_bus, 34065d2aa710SAlistair Popple .dma_set_mask = pnv_npu_dma_set_mask, 34075d2aa710SAlistair Popple .shutdown = pnv_pci_ioda_shutdown, 34085d2aa710SAlistair Popple }; 34095d2aa710SAlistair Popple 3410e51df2c1SAnton Blanchard static void __init pnv_pci_init_ioda_phb(struct device_node *np, 3411e9cc17d4SGavin Shan u64 hub_id, int ioda_type) 3412184cd4a3SBenjamin Herrenschmidt { 3413184cd4a3SBenjamin Herrenschmidt struct pci_controller *hose; 3414184cd4a3SBenjamin Herrenschmidt struct pnv_phb *phb; 34152b923ed1SGavin Shan unsigned long size, m64map_off, m32map_off, pemap_off; 34162b923ed1SGavin Shan unsigned long iomap_off = 0, dma32map_off = 0; 3417c681b93cSAlistair Popple const __be64 *prop64; 34183a1a4661SBenjamin Herrenschmidt const __be32 *prop32; 3419f1b7cc3eSGavin Shan int len; 34203fa23ff8SGavin Shan unsigned int segno; 3421184cd4a3SBenjamin Herrenschmidt u64 phb_id; 3422184cd4a3SBenjamin Herrenschmidt void *aux; 3423184cd4a3SBenjamin Herrenschmidt long rc; 3424184cd4a3SBenjamin Herrenschmidt 3425aa0c033fSGavin Shan pr_info("Initializing IODA%d OPAL PHB %s\n", ioda_type, np->full_name); 3426184cd4a3SBenjamin Herrenschmidt 3427184cd4a3SBenjamin Herrenschmidt prop64 = of_get_property(np, "ibm,opal-phbid", NULL); 3428184cd4a3SBenjamin Herrenschmidt if (!prop64) { 3429184cd4a3SBenjamin Herrenschmidt pr_err(" Missing \"ibm,opal-phbid\" property !\n"); 3430184cd4a3SBenjamin Herrenschmidt return; 3431184cd4a3SBenjamin Herrenschmidt } 3432184cd4a3SBenjamin Herrenschmidt phb_id = be64_to_cpup(prop64); 3433184cd4a3SBenjamin Herrenschmidt pr_debug(" PHB-ID : 0x%016llx\n", phb_id); 3434184cd4a3SBenjamin Herrenschmidt 3435e39f223fSMichael Ellerman phb = memblock_virt_alloc(sizeof(struct pnv_phb), 0); 343658d714ecSGavin Shan 343758d714ecSGavin Shan /* Allocate PCI controller */ 3438184cd4a3SBenjamin Herrenschmidt phb->hose = hose = pcibios_alloc_controller(np); 343958d714ecSGavin Shan if (!phb->hose) { 344058d714ecSGavin Shan pr_err(" Can't allocate PCI controller for %s\n", 3441184cd4a3SBenjamin Herrenschmidt np->full_name); 3442e39f223fSMichael Ellerman memblock_free(__pa(phb), sizeof(struct pnv_phb)); 3443184cd4a3SBenjamin Herrenschmidt return; 3444184cd4a3SBenjamin Herrenschmidt } 3445184cd4a3SBenjamin Herrenschmidt 3446184cd4a3SBenjamin Herrenschmidt spin_lock_init(&phb->lock); 3447f1b7cc3eSGavin Shan prop32 = of_get_property(np, "bus-range", &len); 3448f1b7cc3eSGavin Shan if (prop32 && len == 8) { 34493a1a4661SBenjamin Herrenschmidt hose->first_busno = be32_to_cpu(prop32[0]); 34503a1a4661SBenjamin Herrenschmidt hose->last_busno = be32_to_cpu(prop32[1]); 3451f1b7cc3eSGavin Shan } else { 3452f1b7cc3eSGavin Shan pr_warn(" Broken <bus-range> on %s\n", np->full_name); 3453184cd4a3SBenjamin Herrenschmidt hose->first_busno = 0; 3454184cd4a3SBenjamin Herrenschmidt hose->last_busno = 0xff; 3455f1b7cc3eSGavin Shan } 3456184cd4a3SBenjamin Herrenschmidt hose->private_data = phb; 3457e9cc17d4SGavin Shan phb->hub_id = hub_id; 3458184cd4a3SBenjamin Herrenschmidt phb->opal_id = phb_id; 3459aa0c033fSGavin Shan phb->type = ioda_type; 3460781a868fSWei Yang mutex_init(&phb->ioda.pe_alloc_mutex); 3461184cd4a3SBenjamin Herrenschmidt 3462cee72d5bSBenjamin Herrenschmidt /* Detect specific models for error handling */ 3463cee72d5bSBenjamin Herrenschmidt if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) 3464cee72d5bSBenjamin Herrenschmidt phb->model = PNV_PHB_MODEL_P7IOC; 3465f3d40c25SBenjamin Herrenschmidt else if (of_device_is_compatible(np, "ibm,power8-pciex")) 3466aa0c033fSGavin Shan phb->model = PNV_PHB_MODEL_PHB3; 34675d2aa710SAlistair Popple else if (of_device_is_compatible(np, "ibm,power8-npu-pciex")) 34685d2aa710SAlistair Popple phb->model = PNV_PHB_MODEL_NPU; 3469cee72d5bSBenjamin Herrenschmidt else 3470cee72d5bSBenjamin Herrenschmidt phb->model = PNV_PHB_MODEL_UNKNOWN; 3471cee72d5bSBenjamin Herrenschmidt 3472aa0c033fSGavin Shan /* Parse 32-bit and IO ranges (if any) */ 34732f1ec02eSGavin Shan pci_process_bridge_OF_ranges(hose, np, !hose->global_number); 3474184cd4a3SBenjamin Herrenschmidt 3475aa0c033fSGavin Shan /* Get registers */ 3476184cd4a3SBenjamin Herrenschmidt phb->regs = of_iomap(np, 0); 3477184cd4a3SBenjamin Herrenschmidt if (phb->regs == NULL) 3478184cd4a3SBenjamin Herrenschmidt pr_err(" Failed to map registers !\n"); 3479184cd4a3SBenjamin Herrenschmidt 3480184cd4a3SBenjamin Herrenschmidt /* Initialize more IODA stuff */ 348192b8f137SGavin Shan phb->ioda.total_pe_num = 1; 348236954dc7SGavin Shan prop32 = of_get_property(np, "ibm,opal-num-pes", NULL); 348336954dc7SGavin Shan if (prop32) 348492b8f137SGavin Shan phb->ioda.total_pe_num = be32_to_cpup(prop32); 348536954dc7SGavin Shan prop32 = of_get_property(np, "ibm,opal-reserved-pe", NULL); 348636954dc7SGavin Shan if (prop32) 348792b8f137SGavin Shan phb->ioda.reserved_pe_idx = be32_to_cpup(prop32); 3488262af557SGuo Chao 3489262af557SGuo Chao /* Parse 64-bit MMIO range */ 3490262af557SGuo Chao pnv_ioda_parse_m64_window(phb); 3491262af557SGuo Chao 3492184cd4a3SBenjamin Herrenschmidt phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); 3493aa0c033fSGavin Shan /* FW Has already off top 64k of M32 space (MSI space) */ 3494184cd4a3SBenjamin Herrenschmidt phb->ioda.m32_size += 0x10000; 3495184cd4a3SBenjamin Herrenschmidt 349692b8f137SGavin Shan phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe_num; 34973fd47f06SBenjamin Herrenschmidt phb->ioda.m32_pci_base = hose->mem_resources[0].start - hose->mem_offset[0]; 3498184cd4a3SBenjamin Herrenschmidt phb->ioda.io_size = hose->pci_io_size; 349992b8f137SGavin Shan phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe_num; 3500184cd4a3SBenjamin Herrenschmidt phb->ioda.io_pci_base = 0; /* XXX calculate this ? */ 3501184cd4a3SBenjamin Herrenschmidt 35022b923ed1SGavin Shan /* Calculate how many 32-bit TCE segments we have */ 35032b923ed1SGavin Shan phb->ioda.dma32_count = phb->ioda.m32_pci_base / 35042b923ed1SGavin Shan PNV_IODA1_DMA32_SEGSIZE; 35052b923ed1SGavin Shan 3506c35d2a8cSGavin Shan /* Allocate aux data & arrays. We don't have IO ports on PHB3 */ 350792b8f137SGavin Shan size = _ALIGN_UP(phb->ioda.total_pe_num / 8, sizeof(unsigned long)); 350893289d8cSGavin Shan m64map_off = size; 350993289d8cSGavin Shan size += phb->ioda.total_pe_num * sizeof(phb->ioda.m64_segmap[0]); 3510184cd4a3SBenjamin Herrenschmidt m32map_off = size; 351192b8f137SGavin Shan size += phb->ioda.total_pe_num * sizeof(phb->ioda.m32_segmap[0]); 3512c35d2a8cSGavin Shan if (phb->type == PNV_PHB_IODA1) { 3513c35d2a8cSGavin Shan iomap_off = size; 351492b8f137SGavin Shan size += phb->ioda.total_pe_num * sizeof(phb->ioda.io_segmap[0]); 35152b923ed1SGavin Shan dma32map_off = size; 35162b923ed1SGavin Shan size += phb->ioda.dma32_count * 35172b923ed1SGavin Shan sizeof(phb->ioda.dma32_segmap[0]); 3518c35d2a8cSGavin Shan } 3519184cd4a3SBenjamin Herrenschmidt pemap_off = size; 352092b8f137SGavin Shan size += phb->ioda.total_pe_num * sizeof(struct pnv_ioda_pe); 3521e39f223fSMichael Ellerman aux = memblock_virt_alloc(size, 0); 3522184cd4a3SBenjamin Herrenschmidt phb->ioda.pe_alloc = aux; 352393289d8cSGavin Shan phb->ioda.m64_segmap = aux + m64map_off; 3524184cd4a3SBenjamin Herrenschmidt phb->ioda.m32_segmap = aux + m32map_off; 352593289d8cSGavin Shan for (segno = 0; segno < phb->ioda.total_pe_num; segno++) { 352693289d8cSGavin Shan phb->ioda.m64_segmap[segno] = IODA_INVALID_PE; 35273fa23ff8SGavin Shan phb->ioda.m32_segmap[segno] = IODA_INVALID_PE; 352893289d8cSGavin Shan } 35293fa23ff8SGavin Shan if (phb->type == PNV_PHB_IODA1) { 3530184cd4a3SBenjamin Herrenschmidt phb->ioda.io_segmap = aux + iomap_off; 35313fa23ff8SGavin Shan for (segno = 0; segno < phb->ioda.total_pe_num; segno++) 35323fa23ff8SGavin Shan phb->ioda.io_segmap[segno] = IODA_INVALID_PE; 35332b923ed1SGavin Shan 35342b923ed1SGavin Shan phb->ioda.dma32_segmap = aux + dma32map_off; 35352b923ed1SGavin Shan for (segno = 0; segno < phb->ioda.dma32_count; segno++) 35362b923ed1SGavin Shan phb->ioda.dma32_segmap[segno] = IODA_INVALID_PE; 35373fa23ff8SGavin Shan } 3538184cd4a3SBenjamin Herrenschmidt phb->ioda.pe_array = aux + pemap_off; 353992b8f137SGavin Shan set_bit(phb->ioda.reserved_pe_idx, phb->ioda.pe_alloc); 3540184cd4a3SBenjamin Herrenschmidt 3541184cd4a3SBenjamin Herrenschmidt INIT_LIST_HEAD(&phb->ioda.pe_list); 3542781a868fSWei Yang mutex_init(&phb->ioda.pe_list_mutex); 3543184cd4a3SBenjamin Herrenschmidt 3544184cd4a3SBenjamin Herrenschmidt /* Calculate how many 32-bit TCE segments we have */ 35452b923ed1SGavin Shan phb->ioda.dma32_count = phb->ioda.m32_pci_base / 3546acce971cSGavin Shan PNV_IODA1_DMA32_SEGSIZE; 3547184cd4a3SBenjamin Herrenschmidt 3548aa0c033fSGavin Shan #if 0 /* We should really do that ... */ 3549184cd4a3SBenjamin Herrenschmidt rc = opal_pci_set_phb_mem_window(opal->phb_id, 3550184cd4a3SBenjamin Herrenschmidt window_type, 3551184cd4a3SBenjamin Herrenschmidt window_num, 3552184cd4a3SBenjamin Herrenschmidt starting_real_address, 3553184cd4a3SBenjamin Herrenschmidt starting_pci_address, 3554184cd4a3SBenjamin Herrenschmidt segment_size); 3555184cd4a3SBenjamin Herrenschmidt #endif 3556184cd4a3SBenjamin Herrenschmidt 3557262af557SGuo Chao pr_info(" %03d (%03d) PE's M32: 0x%x [segment=0x%x]\n", 355892b8f137SGavin Shan phb->ioda.total_pe_num, phb->ioda.reserved_pe_idx, 3559262af557SGuo Chao phb->ioda.m32_size, phb->ioda.m32_segsize); 3560262af557SGuo Chao if (phb->ioda.m64_size) 3561262af557SGuo Chao pr_info(" M64: 0x%lx [segment=0x%lx]\n", 3562262af557SGuo Chao phb->ioda.m64_size, phb->ioda.m64_segsize); 3563262af557SGuo Chao if (phb->ioda.io_size) 3564262af557SGuo Chao pr_info(" IO: 0x%x [segment=0x%x]\n", 3565184cd4a3SBenjamin Herrenschmidt phb->ioda.io_size, phb->ioda.io_segsize); 3566184cd4a3SBenjamin Herrenschmidt 3567262af557SGuo Chao 3568184cd4a3SBenjamin Herrenschmidt phb->hose->ops = &pnv_pci_ops; 356949dec922SGavin Shan phb->get_pe_state = pnv_ioda_get_pe_state; 357049dec922SGavin Shan phb->freeze_pe = pnv_ioda_freeze_pe; 357149dec922SGavin Shan phb->unfreeze_pe = pnv_ioda_unfreeze_pe; 3572184cd4a3SBenjamin Herrenschmidt 3573184cd4a3SBenjamin Herrenschmidt /* Setup MSI support */ 3574184cd4a3SBenjamin Herrenschmidt pnv_pci_init_ioda_msis(phb); 3575184cd4a3SBenjamin Herrenschmidt 3576c40a4210SGavin Shan /* 3577c40a4210SGavin Shan * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here 3578c40a4210SGavin Shan * to let the PCI core do resource assignment. It's supposed 3579c40a4210SGavin Shan * that the PCI core will do correct I/O and MMIO alignment 3580c40a4210SGavin Shan * for the P2P bridge bars so that each PCI bus (excluding 3581c40a4210SGavin Shan * the child P2P bridges) can form individual PE. 3582184cd4a3SBenjamin Herrenschmidt */ 3583fb446ad0SGavin Shan ppc_md.pcibios_fixup = pnv_pci_ioda_fixup; 35845d2aa710SAlistair Popple 3585f9f83456SAlexey Kardashevskiy if (phb->type == PNV_PHB_NPU) { 35865d2aa710SAlistair Popple hose->controller_ops = pnv_npu_ioda_controller_ops; 3587f9f83456SAlexey Kardashevskiy } else { 3588f9f83456SAlexey Kardashevskiy phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup; 358992ae0353SDaniel Axtens hose->controller_ops = pnv_pci_ioda_controller_ops; 3590f9f83456SAlexey Kardashevskiy } 3591ad30cb99SMichael Ellerman 35926e628c7dSWei Yang #ifdef CONFIG_PCI_IOV 35936e628c7dSWei Yang ppc_md.pcibios_fixup_sriov = pnv_pci_ioda_fixup_iov_resources; 35945350ab3fSWei Yang ppc_md.pcibios_iov_resource_alignment = pnv_pci_iov_resource_alignment; 3595ad30cb99SMichael Ellerman #endif 3596ad30cb99SMichael Ellerman 3597c40a4210SGavin Shan pci_add_flags(PCI_REASSIGN_ALL_RSRC); 3598184cd4a3SBenjamin Herrenschmidt 3599184cd4a3SBenjamin Herrenschmidt /* Reset IODA tables to a clean state */ 3600d1a85eeeSGavin Shan rc = opal_pci_reset(phb_id, OPAL_RESET_PCI_IODA_TABLE, OPAL_ASSERT_RESET); 3601184cd4a3SBenjamin Herrenschmidt if (rc) 3602f11fe552SBenjamin Herrenschmidt pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); 3603361f2a2aSGavin Shan 3604361f2a2aSGavin Shan /* If we're running in kdump kerenl, the previous kerenl never 3605361f2a2aSGavin Shan * shutdown PCI devices correctly. We already got IODA table 3606361f2a2aSGavin Shan * cleaned out. So we have to issue PHB reset to stop all PCI 3607361f2a2aSGavin Shan * transactions from previous kerenl. 3608361f2a2aSGavin Shan */ 3609361f2a2aSGavin Shan if (is_kdump_kernel()) { 3610361f2a2aSGavin Shan pr_info(" Issue PHB reset ...\n"); 3611cadf364dSGavin Shan pnv_eeh_phb_reset(hose, EEH_RESET_FUNDAMENTAL); 3612cadf364dSGavin Shan pnv_eeh_phb_reset(hose, EEH_RESET_DEACTIVATE); 3613361f2a2aSGavin Shan } 3614262af557SGuo Chao 36159e9e8935SGavin Shan /* Remove M64 resource if we can't configure it successfully */ 36169e9e8935SGavin Shan if (!phb->init_m64 || phb->init_m64(phb)) 3617262af557SGuo Chao hose->mem_resources[1].flags = 0; 3618184cd4a3SBenjamin Herrenschmidt } 3619184cd4a3SBenjamin Herrenschmidt 362067975005SBjorn Helgaas void __init pnv_pci_init_ioda2_phb(struct device_node *np) 3621aa0c033fSGavin Shan { 3622e9cc17d4SGavin Shan pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2); 3623aa0c033fSGavin Shan } 3624aa0c033fSGavin Shan 36255d2aa710SAlistair Popple void __init pnv_pci_init_npu_phb(struct device_node *np) 36265d2aa710SAlistair Popple { 36275d2aa710SAlistair Popple pnv_pci_init_ioda_phb(np, 0, PNV_PHB_NPU); 36285d2aa710SAlistair Popple } 36295d2aa710SAlistair Popple 3630184cd4a3SBenjamin Herrenschmidt void __init pnv_pci_init_ioda_hub(struct device_node *np) 3631184cd4a3SBenjamin Herrenschmidt { 3632184cd4a3SBenjamin Herrenschmidt struct device_node *phbn; 3633c681b93cSAlistair Popple const __be64 *prop64; 3634184cd4a3SBenjamin Herrenschmidt u64 hub_id; 3635184cd4a3SBenjamin Herrenschmidt 3636184cd4a3SBenjamin Herrenschmidt pr_info("Probing IODA IO-Hub %s\n", np->full_name); 3637184cd4a3SBenjamin Herrenschmidt 3638184cd4a3SBenjamin Herrenschmidt prop64 = of_get_property(np, "ibm,opal-hubid", NULL); 3639184cd4a3SBenjamin Herrenschmidt if (!prop64) { 3640184cd4a3SBenjamin Herrenschmidt pr_err(" Missing \"ibm,opal-hubid\" property !\n"); 3641184cd4a3SBenjamin Herrenschmidt return; 3642184cd4a3SBenjamin Herrenschmidt } 3643184cd4a3SBenjamin Herrenschmidt hub_id = be64_to_cpup(prop64); 3644184cd4a3SBenjamin Herrenschmidt pr_devel(" HUB-ID : 0x%016llx\n", hub_id); 3645184cd4a3SBenjamin Herrenschmidt 3646184cd4a3SBenjamin Herrenschmidt /* Count child PHBs */ 3647184cd4a3SBenjamin Herrenschmidt for_each_child_of_node(np, phbn) { 3648184cd4a3SBenjamin Herrenschmidt /* Look for IODA1 PHBs */ 3649184cd4a3SBenjamin Herrenschmidt if (of_device_is_compatible(phbn, "ibm,ioda-phb")) 3650e9cc17d4SGavin Shan pnv_pci_init_ioda_phb(phbn, hub_id, PNV_PHB_IODA1); 3651184cd4a3SBenjamin Herrenschmidt } 3652184cd4a3SBenjamin Herrenschmidt } 3653