1 /* 2 * libqos PCI bindings for SPAPR 3 * 4 * This work is licensed under the terms of the GNU GPL, version 2 or later. 5 * See the COPYING file in the top-level directory. 6 */ 7 8 #include "qemu/osdep.h" 9 #include "libqtest.h" 10 #include "pci-spapr.h" 11 #include "rtas.h" 12 #include "qgraph.h" 13 14 #include "hw/pci/pci_regs.h" 15 16 #include "qemu/host-utils.h" 17 #include "qemu/module.h" 18 19 /* 20 * PCI devices are always little-endian 21 * SPAPR by default is big-endian 22 * so PCI accessors need to swap data endianness 23 */ 24 25 static uint8_t qpci_spapr_pio_readb(QPCIBus *bus, uint32_t addr) 26 { 27 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 28 return qtest_readb(bus->qts, s->pio_cpu_base + addr); 29 } 30 31 static void qpci_spapr_pio_writeb(QPCIBus *bus, uint32_t addr, uint8_t val) 32 { 33 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 34 qtest_writeb(bus->qts, s->pio_cpu_base + addr, val); 35 } 36 37 static uint16_t qpci_spapr_pio_readw(QPCIBus *bus, uint32_t addr) 38 { 39 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 40 return bswap16(qtest_readw(bus->qts, s->pio_cpu_base + addr)); 41 } 42 43 static void qpci_spapr_pio_writew(QPCIBus *bus, uint32_t addr, uint16_t val) 44 { 45 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 46 qtest_writew(bus->qts, s->pio_cpu_base + addr, bswap16(val)); 47 } 48 49 static uint32_t qpci_spapr_pio_readl(QPCIBus *bus, uint32_t addr) 50 { 51 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 52 return bswap32(qtest_readl(bus->qts, s->pio_cpu_base + addr)); 53 } 54 55 static void qpci_spapr_pio_writel(QPCIBus *bus, uint32_t addr, uint32_t val) 56 { 57 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 58 qtest_writel(bus->qts, s->pio_cpu_base + addr, bswap32(val)); 59 } 60 61 static uint64_t qpci_spapr_pio_readq(QPCIBus *bus, uint32_t addr) 62 { 63 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 64 return bswap64(qtest_readq(bus->qts, s->pio_cpu_base + addr)); 65 } 66 67 static void qpci_spapr_pio_writeq(QPCIBus *bus, uint32_t addr, uint64_t val) 68 { 69 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 70 qtest_writeq(bus->qts, s->pio_cpu_base + addr, bswap64(val)); 71 } 72 73 static void qpci_spapr_memread(QPCIBus *bus, uint32_t addr, 74 void *buf, size_t len) 75 { 76 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 77 qtest_memread(bus->qts, s->mmio32_cpu_base + addr, buf, len); 78 } 79 80 static void qpci_spapr_memwrite(QPCIBus *bus, uint32_t addr, 81 const void *buf, size_t len) 82 { 83 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 84 qtest_memwrite(bus->qts, s->mmio32_cpu_base + addr, buf, len); 85 } 86 87 static uint8_t qpci_spapr_config_readb(QPCIBus *bus, int devfn, uint8_t offset) 88 { 89 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 90 uint32_t config_addr = (devfn << 8) | offset; 91 return qrtas_ibm_read_pci_config(bus->qts, s->alloc, s->buid, 92 config_addr, 1); 93 } 94 95 static uint16_t qpci_spapr_config_readw(QPCIBus *bus, int devfn, uint8_t offset) 96 { 97 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 98 uint32_t config_addr = (devfn << 8) | offset; 99 return qrtas_ibm_read_pci_config(bus->qts, s->alloc, s->buid, 100 config_addr, 2); 101 } 102 103 static uint32_t qpci_spapr_config_readl(QPCIBus *bus, int devfn, uint8_t offset) 104 { 105 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 106 uint32_t config_addr = (devfn << 8) | offset; 107 return qrtas_ibm_read_pci_config(bus->qts, s->alloc, s->buid, 108 config_addr, 4); 109 } 110 111 static void qpci_spapr_config_writeb(QPCIBus *bus, int devfn, uint8_t offset, 112 uint8_t value) 113 { 114 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 115 uint32_t config_addr = (devfn << 8) | offset; 116 qrtas_ibm_write_pci_config(bus->qts, s->alloc, s->buid, 117 config_addr, 1, value); 118 } 119 120 static void qpci_spapr_config_writew(QPCIBus *bus, int devfn, uint8_t offset, 121 uint16_t value) 122 { 123 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 124 uint32_t config_addr = (devfn << 8) | offset; 125 qrtas_ibm_write_pci_config(bus->qts, s->alloc, s->buid, 126 config_addr, 2, value); 127 } 128 129 static void qpci_spapr_config_writel(QPCIBus *bus, int devfn, uint8_t offset, 130 uint32_t value) 131 { 132 QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus); 133 uint32_t config_addr = (devfn << 8) | offset; 134 qrtas_ibm_write_pci_config(bus->qts, s->alloc, s->buid, 135 config_addr, 4, value); 136 } 137 138 #define SPAPR_PCI_BASE (1ULL << 45) 139 140 #define SPAPR_PCI_MMIO32_WIN_SIZE 0x80000000 /* 2 GiB */ 141 #define SPAPR_PCI_IO_WIN_SIZE 0x10000 142 143 static void *qpci_spapr_get_driver(void *obj, const char *interface) 144 { 145 QPCIBusSPAPR *qpci = obj; 146 if (!g_strcmp0(interface, "pci-bus")) { 147 return &qpci->bus; 148 } 149 fprintf(stderr, "%s not present in pci-bus-spapr", interface); 150 g_assert_not_reached(); 151 } 152 153 void qpci_init_spapr(QPCIBusSPAPR *qpci, QTestState *qts, 154 QGuestAllocator *alloc) 155 { 156 assert(qts); 157 158 /* tests cannot use spapr, needs to be fixed first */ 159 qpci->bus.has_buggy_msi = true; 160 161 qpci->alloc = alloc; 162 163 qpci->bus.pio_readb = qpci_spapr_pio_readb; 164 qpci->bus.pio_readw = qpci_spapr_pio_readw; 165 qpci->bus.pio_readl = qpci_spapr_pio_readl; 166 qpci->bus.pio_readq = qpci_spapr_pio_readq; 167 168 qpci->bus.pio_writeb = qpci_spapr_pio_writeb; 169 qpci->bus.pio_writew = qpci_spapr_pio_writew; 170 qpci->bus.pio_writel = qpci_spapr_pio_writel; 171 qpci->bus.pio_writeq = qpci_spapr_pio_writeq; 172 173 qpci->bus.memread = qpci_spapr_memread; 174 qpci->bus.memwrite = qpci_spapr_memwrite; 175 176 qpci->bus.config_readb = qpci_spapr_config_readb; 177 qpci->bus.config_readw = qpci_spapr_config_readw; 178 qpci->bus.config_readl = qpci_spapr_config_readl; 179 180 qpci->bus.config_writeb = qpci_spapr_config_writeb; 181 qpci->bus.config_writew = qpci_spapr_config_writew; 182 qpci->bus.config_writel = qpci_spapr_config_writel; 183 184 /* FIXME: We assume the default location of the PHB for now. 185 * Ideally we'd parse the device tree deposited in the guest to 186 * get the window locations */ 187 qpci->buid = 0x800000020000000ULL; 188 189 qpci->pio_cpu_base = SPAPR_PCI_BASE; 190 qpci->pio.pci_base = 0; 191 qpci->pio.size = SPAPR_PCI_IO_WIN_SIZE; 192 193 /* 32-bit portion of the MMIO window is at PCI address 2..4 GiB */ 194 qpci->mmio32_cpu_base = SPAPR_PCI_BASE; 195 qpci->mmio32.pci_base = SPAPR_PCI_MMIO32_WIN_SIZE; 196 qpci->mmio32.size = SPAPR_PCI_MMIO32_WIN_SIZE; 197 198 qpci->bus.qts = qts; 199 qpci->bus.pio_alloc_ptr = 0xc000; 200 qpci->bus.mmio_alloc_ptr = qpci->mmio32.pci_base; 201 qpci->bus.mmio_limit = qpci->mmio32.pci_base + qpci->mmio32.size; 202 203 qpci->obj.get_driver = qpci_spapr_get_driver; 204 } 205 206 QPCIBus *qpci_new_spapr(QTestState *qts, QGuestAllocator *alloc) 207 { 208 QPCIBusSPAPR *qpci = g_new0(QPCIBusSPAPR, 1); 209 qpci_init_spapr(qpci, qts, alloc); 210 211 return &qpci->bus; 212 } 213 214 void qpci_free_spapr(QPCIBus *bus) 215 { 216 QPCIBusSPAPR *s; 217 218 if (!bus) { 219 return; 220 } 221 s = container_of(bus, QPCIBusSPAPR, bus); 222 223 g_free(s); 224 } 225 226 static void qpci_spapr_register_nodes(void) 227 { 228 qos_node_create_driver("pci-bus-spapr", NULL); 229 qos_node_produces("pci-bus-spapr", "pci-bus"); 230 } 231 232 libqos_init(qpci_spapr_register_nodes); 233