1 /*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Semihalf under 6 * the sponsorship of the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /* Common PCIe functions for Cavium Thunder SOC */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_platform.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/bus.h> 42 #include <sys/rman.h> 43 44 #include <machine/bus.h> 45 #include <machine/cpu.h> 46 #include <machine/intr.h> 47 48 #ifdef FDT 49 #include <dev/ofw/openfirm.h> 50 #include <dev/ofw/ofw_bus.h> 51 #include <dev/ofw/ofw_bus_subr.h> 52 #include <dev/ofw/ofw_pci.h> 53 #endif 54 55 #include <sys/pciio.h> 56 #include <dev/pci/pcireg.h> 57 #include <dev/pci/pcivar.h> 58 #include <dev/pci/pci_private.h> 59 #include <dev/pci/pcib_private.h> 60 #include <dev/pci/pci_host_generic.h> 61 #ifdef FDT 62 #include <dev/pci/pci_host_generic_fdt.h> 63 #endif 64 65 #include "thunder_pcie_common.h" 66 67 MALLOC_DEFINE(M_THUNDER_PCIE, "Thunder PCIe driver", "Thunder PCIe driver memory"); 68 69 #define THUNDER_CFG_BASE_TO_ECAM(x) ((((x) >> 36UL) & 0x3) | (((x) >> 42UL) & 0x4)) 70 71 uint32_t 72 range_addr_is_pci(struct pcie_range *ranges, uint64_t addr, uint64_t size) 73 { 74 struct pcie_range *r; 75 int tuple; 76 77 for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) { 78 r = &ranges[tuple]; 79 if (addr >= r->pci_base && 80 addr < (r->pci_base + r->size) && 81 size < r->size) { 82 /* Address is within PCI range */ 83 return (1); 84 } 85 } 86 87 /* Address is outside PCI range */ 88 return (0); 89 } 90 91 uint32_t 92 range_addr_is_phys(struct pcie_range *ranges, uint64_t addr, uint64_t size) 93 { 94 struct pcie_range *r; 95 int tuple; 96 97 for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) { 98 r = &ranges[tuple]; 99 if (addr >= r->phys_base && 100 addr < (r->phys_base + r->size) && 101 size < r->size) { 102 /* Address is within Physical range */ 103 return (1); 104 } 105 } 106 107 /* Address is outside Physical range */ 108 return (0); 109 } 110 111 uint64_t 112 range_addr_phys_to_pci(struct pcie_range *ranges, uint64_t phys_addr) 113 { 114 struct pcie_range *r; 115 uint64_t offset; 116 int tuple; 117 118 /* Find physical address corresponding to given bus address */ 119 for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) { 120 r = &ranges[tuple]; 121 if (phys_addr >= r->phys_base && 122 phys_addr < (r->phys_base + r->size)) { 123 /* Given phys addr is in this range. 124 * Translate phys addr to bus addr. 125 */ 126 offset = phys_addr - r->phys_base; 127 return (r->pci_base + offset); 128 } 129 } 130 return (0); 131 } 132 133 uint64_t 134 range_addr_pci_to_phys(struct pcie_range *ranges, uint64_t pci_addr) 135 { 136 struct pcie_range *r; 137 uint64_t offset; 138 int tuple; 139 140 /* Find physical address corresponding to given bus address */ 141 for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) { 142 r = &ranges[tuple]; 143 if (pci_addr >= r->pci_base && 144 pci_addr < (r->pci_base + r->size)) { 145 /* Given pci addr is in this range. 146 * Translate bus addr to phys addr. 147 */ 148 offset = pci_addr - r->pci_base; 149 return (r->phys_base + offset); 150 } 151 } 152 return (0); 153 } 154 155 int 156 thunder_pcie_identify_ecam(device_t dev, int *ecam) 157 { 158 rman_res_t start; 159 160 /* Check if we're running on Cavium ThunderX */ 161 if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK, 162 CPU_IMPL_CAVIUM, CPU_PART_THUNDER, 0, 0)) 163 return (EINVAL); 164 165 start = bus_get_resource_start(dev, SYS_RES_MEMORY, 0); 166 *ecam = THUNDER_CFG_BASE_TO_ECAM(start); 167 168 device_printf(dev, "ThunderX quirk, setting ECAM to %d\n", *ecam); 169 170 return (0); 171 } 172 173 #ifdef THUNDERX_PASS_1_1_ERRATA 174 struct resource * 175 thunder_pcie_alloc_resource(device_t dev, device_t child, int type, int *rid, 176 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 177 { 178 pci_addr_t map, testval; 179 180 /* 181 * If Enhanced Allocation is not used, we can't allocate any random 182 * range. All internal devices have hardcoded place where they can 183 * be located within PCI address space. Fortunately, we can read 184 * this value from BAR. 185 */ 186 if (((type == SYS_RES_IOPORT) || (type == SYS_RES_MEMORY)) && 187 RMAN_IS_DEFAULT_RANGE(start, end)) { 188 189 /* Read BAR manually to get resource address and size */ 190 pci_read_bar(child, *rid, &map, &testval, NULL); 191 192 /* Mask the information bits */ 193 if (PCI_BAR_MEM(map)) 194 map &= PCIM_BAR_MEM_BASE; 195 else 196 map &= PCIM_BAR_IO_BASE; 197 198 if (PCI_BAR_MEM(testval)) 199 testval &= PCIM_BAR_MEM_BASE; 200 else 201 testval &= PCIM_BAR_IO_BASE; 202 203 start = map; 204 end = start + count - 1; 205 } 206 207 return (pci_host_generic_core_alloc_resource(dev, child, type, rid, 208 start, end, count, flags)); 209 } 210 #endif 211