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