1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2001 Dave Engebretsen, IBM Corporation 4 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM 5 * 6 * pSeries specific routines for PCI. 7 */ 8 9 #include <linux/init.h> 10 #include <linux/ioport.h> 11 #include <linux/kernel.h> 12 #include <linux/pci.h> 13 #include <linux/string.h> 14 15 #include <asm/eeh.h> 16 #include <asm/pci-bridge.h> 17 #include <asm/prom.h> 18 #include <asm/ppc-pci.h> 19 #include <asm/pci.h> 20 #include "pseries.h" 21 22 #if 0 23 void pcibios_name_device(struct pci_dev *dev) 24 { 25 struct device_node *dn; 26 27 /* 28 * Add IBM loc code (slot) as a prefix to the device names for service 29 */ 30 dn = pci_device_to_OF_node(dev); 31 if (dn) { 32 const char *loc_code = of_get_property(dn, "ibm,loc-code", 33 NULL); 34 if (loc_code) { 35 int loc_len = strlen(loc_code); 36 if (loc_len < sizeof(dev->dev.name)) { 37 memmove(dev->dev.name+loc_len+1, dev->dev.name, 38 sizeof(dev->dev.name)-loc_len-1); 39 memcpy(dev->dev.name, loc_code, loc_len); 40 dev->dev.name[loc_len] = ' '; 41 dev->dev.name[sizeof(dev->dev.name)-1] = '\0'; 42 } 43 } 44 } 45 } 46 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device); 47 #endif 48 49 #ifdef CONFIG_PCI_IOV 50 #define MAX_VFS_FOR_MAP_PE 256 51 struct pe_map_bar_entry { 52 __be64 bar; /* Input: Virtual Function BAR */ 53 __be16 rid; /* Input: Virtual Function Router ID */ 54 __be16 pe_num; /* Output: Virtual Function PE Number */ 55 __be32 reserved; /* Reserved Space */ 56 }; 57 58 int pseries_send_map_pe(struct pci_dev *pdev, 59 u16 num_vfs, 60 struct pe_map_bar_entry *vf_pe_array) 61 { 62 struct pci_dn *pdn; 63 int rc; 64 unsigned long buid, addr; 65 int ibm_map_pes = rtas_token("ibm,open-sriov-map-pe-number"); 66 67 if (ibm_map_pes == RTAS_UNKNOWN_SERVICE) 68 return -EINVAL; 69 70 pdn = pci_get_pdn(pdev); 71 addr = rtas_config_addr(pdn->busno, pdn->devfn, 0); 72 buid = pdn->phb->buid; 73 spin_lock(&rtas_data_buf_lock); 74 memcpy(rtas_data_buf, vf_pe_array, 75 RTAS_DATA_BUF_SIZE); 76 rc = rtas_call(ibm_map_pes, 5, 1, NULL, addr, 77 BUID_HI(buid), BUID_LO(buid), 78 rtas_data_buf, 79 num_vfs * sizeof(struct pe_map_bar_entry)); 80 memcpy(vf_pe_array, rtas_data_buf, RTAS_DATA_BUF_SIZE); 81 spin_unlock(&rtas_data_buf_lock); 82 83 if (rc) 84 dev_err(&pdev->dev, 85 "%s: Failed to associate pes PE#%lx, rc=%x\n", 86 __func__, addr, rc); 87 88 return rc; 89 } 90 91 void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num) 92 { 93 struct pci_dn *pdn; 94 95 pdn = pci_get_pdn(pdev); 96 pdn->pe_num_map[vf_index] = be16_to_cpu(pe_num); 97 dev_dbg(&pdev->dev, "VF %04x:%02x:%02x.%x associated with PE#%x\n", 98 pci_domain_nr(pdev->bus), 99 pdev->bus->number, 100 PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)), 101 PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)), 102 pdn->pe_num_map[vf_index]); 103 } 104 105 int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs) 106 { 107 struct pci_dn *pdn; 108 int i, rc, vf_index; 109 struct pe_map_bar_entry *vf_pe_array; 110 struct resource *res; 111 u64 size; 112 113 vf_pe_array = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL); 114 if (!vf_pe_array) 115 return -ENOMEM; 116 117 pdn = pci_get_pdn(pdev); 118 /* create firmware structure to associate pes */ 119 for (vf_index = 0; vf_index < num_vfs; vf_index++) { 120 pdn->pe_num_map[vf_index] = IODA_INVALID_PE; 121 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { 122 res = &pdev->resource[i + PCI_IOV_RESOURCES]; 123 if (!res->parent) 124 continue; 125 size = pcibios_iov_resource_alignment(pdev, i + 126 PCI_IOV_RESOURCES); 127 vf_pe_array[vf_index].bar = 128 cpu_to_be64(res->start + size * vf_index); 129 vf_pe_array[vf_index].rid = 130 cpu_to_be16((pci_iov_virtfn_bus(pdev, vf_index) 131 << 8) | pci_iov_virtfn_devfn(pdev, 132 vf_index)); 133 vf_pe_array[vf_index].pe_num = 134 cpu_to_be16(IODA_INVALID_PE); 135 } 136 } 137 138 rc = pseries_send_map_pe(pdev, num_vfs, vf_pe_array); 139 /* Only zero is success */ 140 if (!rc) 141 for (vf_index = 0; vf_index < num_vfs; vf_index++) 142 pseries_set_pe_num(pdev, vf_index, 143 vf_pe_array[vf_index].pe_num); 144 145 kfree(vf_pe_array); 146 return rc; 147 } 148 149 int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs) 150 { 151 struct pci_dn *pdn; 152 int rc; 153 const int *max_vfs; 154 int max_config_vfs; 155 struct device_node *dn = pci_device_to_OF_node(pdev); 156 157 max_vfs = of_get_property(dn, "ibm,number-of-configurable-vfs", NULL); 158 159 if (!max_vfs) 160 return -EINVAL; 161 162 /* First integer stores max config */ 163 max_config_vfs = of_read_number(&max_vfs[0], 1); 164 if (max_config_vfs < num_vfs && num_vfs > MAX_VFS_FOR_MAP_PE) { 165 dev_err(&pdev->dev, 166 "Num VFs %x > %x Configurable VFs\n", 167 num_vfs, (num_vfs > MAX_VFS_FOR_MAP_PE) ? 168 MAX_VFS_FOR_MAP_PE : max_config_vfs); 169 return -EINVAL; 170 } 171 172 pdn = pci_get_pdn(pdev); 173 pdn->pe_num_map = kmalloc_array(num_vfs, 174 sizeof(*pdn->pe_num_map), 175 GFP_KERNEL); 176 if (!pdn->pe_num_map) 177 return -ENOMEM; 178 179 rc = pseries_associate_pes(pdev, num_vfs); 180 181 /* Anything other than zero is failure */ 182 if (rc) { 183 dev_err(&pdev->dev, "Failure to enable sriov: %x\n", rc); 184 kfree(pdn->pe_num_map); 185 } else { 186 pci_vf_drivers_autoprobe(pdev, false); 187 } 188 189 return rc; 190 } 191 192 int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs) 193 { 194 /* Allocate PCI data */ 195 add_dev_pci_data(pdev); 196 return pseries_pci_sriov_enable(pdev, num_vfs); 197 } 198 199 int pseries_pcibios_sriov_disable(struct pci_dev *pdev) 200 { 201 struct pci_dn *pdn; 202 203 pdn = pci_get_pdn(pdev); 204 /* Releasing pe_num_map */ 205 kfree(pdn->pe_num_map); 206 /* Release PCI data */ 207 remove_dev_pci_data(pdev); 208 pci_vf_drivers_autoprobe(pdev, true); 209 return 0; 210 } 211 #endif 212 213 static void __init pSeries_request_regions(void) 214 { 215 if (!isa_io_base) 216 return; 217 218 request_region(0x20,0x20,"pic1"); 219 request_region(0xa0,0x20,"pic2"); 220 request_region(0x00,0x20,"dma1"); 221 request_region(0x40,0x20,"timer"); 222 request_region(0x80,0x10,"dma page reg"); 223 request_region(0xc0,0x20,"dma2"); 224 } 225 226 void __init pSeries_final_fixup(void) 227 { 228 struct pci_controller *hose; 229 230 pSeries_request_regions(); 231 232 eeh_show_enabled(); 233 234 #ifdef CONFIG_PCI_IOV 235 ppc_md.pcibios_sriov_enable = pseries_pcibios_sriov_enable; 236 ppc_md.pcibios_sriov_disable = pseries_pcibios_sriov_disable; 237 #endif 238 list_for_each_entry(hose, &hose_list, list_node) { 239 struct device_node *dn = hose->dn, *nvdn; 240 241 while (1) { 242 dn = of_find_all_nodes(dn); 243 if (!dn) 244 break; 245 nvdn = of_parse_phandle(dn, "ibm,nvlink", 0); 246 if (!nvdn) 247 continue; 248 if (!of_device_is_compatible(nvdn, "ibm,npu-link")) 249 continue; 250 if (!of_device_is_compatible(nvdn->parent, 251 "ibm,power9-npu")) 252 continue; 253 #ifdef CONFIG_PPC_POWERNV 254 WARN_ON_ONCE(pnv_npu2_init(hose)); 255 #endif 256 break; 257 } 258 } 259 } 260 261 /* 262 * Assume the winbond 82c105 is the IDE controller on a 263 * p610/p615/p630. We should probably be more careful in case 264 * someone tries to plug in a similar adapter. 265 */ 266 static void fixup_winbond_82c105(struct pci_dev* dev) 267 { 268 int i; 269 unsigned int reg; 270 271 if (!machine_is(pseries)) 272 return; 273 274 printk("Using INTC for W82c105 IDE controller.\n"); 275 pci_read_config_dword(dev, 0x40, ®); 276 /* Enable LEGIRQ to use INTC instead of ISA interrupts */ 277 pci_write_config_dword(dev, 0x40, reg | (1<<11)); 278 279 for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) { 280 /* zap the 2nd function of the winbond chip */ 281 if (dev->resource[i].flags & IORESOURCE_IO 282 && dev->bus->number == 0 && dev->devfn == 0x81) 283 dev->resource[i].flags &= ~IORESOURCE_IO; 284 if (dev->resource[i].start == 0 && dev->resource[i].end) { 285 dev->resource[i].flags = 0; 286 dev->resource[i].end = 0; 287 } 288 } 289 } 290 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, 291 fixup_winbond_82c105); 292 293 int pseries_root_bridge_prepare(struct pci_host_bridge *bridge) 294 { 295 struct device_node *dn, *pdn; 296 struct pci_bus *bus; 297 u32 pcie_link_speed_stats[2]; 298 int rc; 299 300 bus = bridge->bus; 301 302 /* Rely on the pcibios_free_controller_deferred() callback. */ 303 pci_set_host_bridge_release(bridge, pcibios_free_controller_deferred, 304 (void *) pci_bus_to_host(bus)); 305 306 dn = pcibios_get_phb_of_node(bus); 307 if (!dn) 308 return 0; 309 310 for (pdn = dn; pdn != NULL; pdn = of_get_next_parent(pdn)) { 311 rc = of_property_read_u32_array(pdn, 312 "ibm,pcie-link-speed-stats", 313 &pcie_link_speed_stats[0], 2); 314 if (!rc) 315 break; 316 } 317 318 of_node_put(pdn); 319 320 if (rc) { 321 pr_debug("no ibm,pcie-link-speed-stats property\n"); 322 return 0; 323 } 324 325 switch (pcie_link_speed_stats[0]) { 326 case 0x01: 327 bus->max_bus_speed = PCIE_SPEED_2_5GT; 328 break; 329 case 0x02: 330 bus->max_bus_speed = PCIE_SPEED_5_0GT; 331 break; 332 case 0x04: 333 bus->max_bus_speed = PCIE_SPEED_8_0GT; 334 break; 335 default: 336 bus->max_bus_speed = PCI_SPEED_UNKNOWN; 337 break; 338 } 339 340 switch (pcie_link_speed_stats[1]) { 341 case 0x01: 342 bus->cur_bus_speed = PCIE_SPEED_2_5GT; 343 break; 344 case 0x02: 345 bus->cur_bus_speed = PCIE_SPEED_5_0GT; 346 break; 347 case 0x04: 348 bus->cur_bus_speed = PCIE_SPEED_8_0GT; 349 break; 350 default: 351 bus->cur_bus_speed = PCI_SPEED_UNKNOWN; 352 break; 353 } 354 355 return 0; 356 } 357