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 62 #include "thunder_pcie_common.h" 63 64 MALLOC_DEFINE(M_THUNDER_PCIE, "Thunder PCIe driver", "Thunder PCIe driver memory"); 65 66 #define THUNDER_CFG_BASE_TO_ECAM(x) ((((x) >> 36UL) & 0x3) | (((x) >> 42UL) & 0x4)) 67 68 uint32_t 69 range_addr_is_pci(struct pcie_range *ranges, uint64_t addr, uint64_t size) 70 { 71 struct pcie_range *r; 72 int tuple; 73 74 for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) { 75 r = &ranges[tuple]; 76 if (addr >= r->pci_base && 77 addr < (r->pci_base + r->size) && 78 size < r->size) { 79 /* Address is within PCI range */ 80 return (1); 81 } 82 } 83 84 /* Address is outside PCI range */ 85 return (0); 86 } 87 88 uint32_t 89 range_addr_is_phys(struct pcie_range *ranges, uint64_t addr, uint64_t size) 90 { 91 struct pcie_range *r; 92 int tuple; 93 94 for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) { 95 r = &ranges[tuple]; 96 if (addr >= r->phys_base && 97 addr < (r->phys_base + r->size) && 98 size < r->size) { 99 /* Address is within Physical range */ 100 return (1); 101 } 102 } 103 104 /* Address is outside Physical range */ 105 return (0); 106 } 107 108 uint64_t 109 range_addr_phys_to_pci(struct pcie_range *ranges, uint64_t phys_addr) 110 { 111 struct pcie_range *r; 112 uint64_t offset; 113 int tuple; 114 115 /* Find physical address corresponding to given bus address */ 116 for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) { 117 r = &ranges[tuple]; 118 if (phys_addr >= r->phys_base && 119 phys_addr < (r->phys_base + r->size)) { 120 /* Given phys addr is in this range. 121 * Translate phys addr to bus addr. 122 */ 123 offset = phys_addr - r->phys_base; 124 return (r->pci_base + offset); 125 } 126 } 127 return (0); 128 } 129 130 uint64_t 131 range_addr_pci_to_phys(struct pcie_range *ranges, uint64_t pci_addr) 132 { 133 struct pcie_range *r; 134 uint64_t offset; 135 int tuple; 136 137 /* Find physical address corresponding to given bus address */ 138 for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) { 139 r = &ranges[tuple]; 140 if (pci_addr >= r->pci_base && 141 pci_addr < (r->pci_base + r->size)) { 142 /* Given pci addr is in this range. 143 * Translate bus addr to phys addr. 144 */ 145 offset = pci_addr - r->pci_base; 146 return (r->phys_base + offset); 147 } 148 } 149 return (0); 150 } 151 152 int 153 thunder_pcie_identify_ecam(device_t dev, int *ecam) 154 { 155 rman_res_t start; 156 157 /* Check if we're running on Cavium ThunderX */ 158 if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK, 159 CPU_IMPL_CAVIUM, CPU_PART_THUNDER, 0, 0)) 160 return (EINVAL); 161 162 start = bus_get_resource_start(dev, SYS_RES_MEMORY, 0); 163 *ecam = THUNDER_CFG_BASE_TO_ECAM(start); 164 165 device_printf(dev, "ThunderX quirk, setting ECAM to %d\n", *ecam); 166 167 return (0); 168 } 169 170 #ifdef THUNDERX_PASS_1_1_ERRATA 171 struct resource * 172 thunder_pcie_alloc_resource(device_t dev, device_t child, int type, int *rid, 173 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 174 { 175 pci_addr_t map, testval; 176 177 /* 178 * If Enhanced Allocation is not used, we can't allocate any random 179 * range. All internal devices have hardcoded place where they can 180 * be located within PCI address space. Fortunately, we can read 181 * this value from BAR. 182 */ 183 if (((type == SYS_RES_IOPORT) || (type == SYS_RES_MEMORY)) && 184 RMAN_IS_DEFAULT_RANGE(start, end)) { 185 186 /* Read BAR manually to get resource address and size */ 187 pci_read_bar(child, *rid, &map, &testval, NULL); 188 189 /* Mask the information bits */ 190 if (PCI_BAR_MEM(map)) 191 map &= PCIM_BAR_MEM_BASE; 192 else 193 map &= PCIM_BAR_IO_BASE; 194 195 if (PCI_BAR_MEM(testval)) 196 testval &= PCIM_BAR_MEM_BASE; 197 else 198 testval &= PCIM_BAR_IO_BASE; 199 200 start = map; 201 end = start + count - 1; 202 } 203 204 return (pci_host_generic_alloc_resource(dev, child, type, rid, start, 205 end, count, flags)); 206 } 207 #endif 208