tests/libqos/pci-spapr.c

   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 "libqos/pci-spapr.h"
  11 #include "libqos/rtas.h"
  12
  13 #include "hw/pci/pci_regs.h"
  14
  15 #include "qemu-common.h"
  16 #include "qemu/host-utils.h"
  17
  18
  19 /* From include/hw/pci-host/spapr.h */
  20
  21 typedef struct QPCIWindow {
  22     uint64_t pci_base;    /* window address in PCI space */
  23     uint64_t size;        /* window size */
  24 } QPCIWindow;
  25
  26 typedef struct QPCIBusSPAPR {
  27     QPCIBus bus;
  28     QGuestAllocator *alloc;
  29
  30     uint64_t buid;
  31
  32     uint64_t pio_cpu_base;
  33     QPCIWindow pio;
  34
  35     uint64_t mmio32_cpu_base;
  36     QPCIWindow mmio32;
  37 } QPCIBusSPAPR;
  38
  39 /*
  40  * PCI devices are always little-endian
  41  * SPAPR by default is big-endian
  42  * so PCI accessors need to swap data endianness
  43  */
  44
  45 static uint8_t qpci_spapr_pio_readb(QPCIBus *bus, uint32_t addr)
  46 {
  47     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  48     return readb(s->pio_cpu_base + addr);
  49 }
  50
  51 static void qpci_spapr_pio_writeb(QPCIBus *bus, uint32_t addr, uint8_t val)
  52 {
  53     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  54     writeb(s->pio_cpu_base + addr, val);
  55 }
  56
  57 static uint16_t qpci_spapr_pio_readw(QPCIBus *bus, uint32_t addr)
  58 {
  59     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  60     return bswap16(readw(s->pio_cpu_base + addr));
  61 }
  62
  63 static void qpci_spapr_pio_writew(QPCIBus *bus, uint32_t addr, uint16_t val)
  64 {
  65     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  66     writew(s->pio_cpu_base + addr, bswap16(val));
  67 }
  68
  69 static uint32_t qpci_spapr_pio_readl(QPCIBus *bus, uint32_t addr)
  70 {
  71     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  72     return bswap32(readl(s->pio_cpu_base + addr));
  73 }
  74
  75 static void qpci_spapr_pio_writel(QPCIBus *bus, uint32_t addr, uint32_t val)
  76 {
  77     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  78     writel(s->pio_cpu_base + addr, bswap32(val));
  79 }
  80
  81 static uint64_t qpci_spapr_pio_readq(QPCIBus *bus, uint32_t addr)
  82 {
  83     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  84     return bswap64(readq(s->pio_cpu_base + addr));
  85 }
  86
  87 static void qpci_spapr_pio_writeq(QPCIBus *bus, uint32_t addr, uint64_t val)
  88 {
  89     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  90     writeq(s->pio_cpu_base + addr, bswap64(val));
  91 }
  92
  93 static void qpci_spapr_memread(QPCIBus *bus, uint32_t addr,
  94                                void *buf, size_t len)
  95 {
  96     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
  97     memread(s->mmio32_cpu_base + addr, buf, len);
  98 }
  99
 100 static void qpci_spapr_memwrite(QPCIBus *bus, uint32_t addr,
 101                                 const void *buf, size_t len)
 102 {
 103     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
 104     memwrite(s->mmio32_cpu_base + addr, buf, len);
 105 }
 106
 107 static uint8_t qpci_spapr_config_readb(QPCIBus *bus, int devfn, uint8_t offset)
 108 {
 109     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
 110     uint32_t config_addr = (devfn << 8) | offset;
 111     return qrtas_ibm_read_pci_config(s->alloc, s->buid, config_addr, 1);
 112 }
 113
 114 static uint16_t qpci_spapr_config_readw(QPCIBus *bus, int devfn, uint8_t offset)
 115 {
 116     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
 117     uint32_t config_addr = (devfn << 8) | offset;
 118     return qrtas_ibm_read_pci_config(s->alloc, s->buid, config_addr, 2);
 119 }
 120
 121 static uint32_t qpci_spapr_config_readl(QPCIBus *bus, int devfn, uint8_t offset)
 122 {
 123     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
 124     uint32_t config_addr = (devfn << 8) | offset;
 125     return qrtas_ibm_read_pci_config(s->alloc, s->buid, config_addr, 4);
 126 }
 127
 128 static void qpci_spapr_config_writeb(QPCIBus *bus, int devfn, uint8_t offset,
 129                                      uint8_t value)
 130 {
 131     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
 132     uint32_t config_addr = (devfn << 8) | offset;
 133     qrtas_ibm_write_pci_config(s->alloc, s->buid, config_addr, 1, value);
 134 }
 135
 136 static void qpci_spapr_config_writew(QPCIBus *bus, int devfn, uint8_t offset,
 137                                      uint16_t value)
 138 {
 139     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
 140     uint32_t config_addr = (devfn << 8) | offset;
 141     qrtas_ibm_write_pci_config(s->alloc, s->buid, config_addr, 2, value);
 142 }
 143
 144 static void qpci_spapr_config_writel(QPCIBus *bus, int devfn, uint8_t offset,
 145                                      uint32_t value)
 146 {
 147     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
 148     uint32_t config_addr = (devfn << 8) | offset;
 149     qrtas_ibm_write_pci_config(s->alloc, s->buid, config_addr, 4, value);
 150 }
 151
 152 #define SPAPR_PCI_BASE               (1ULL << 45)
 153
 154 #define SPAPR_PCI_MMIO32_WIN_SIZE    0x80000000 /* 2 GiB */
 155 #define SPAPR_PCI_IO_WIN_SIZE        0x10000
 156
 157 QPCIBus *qpci_init_spapr(QGuestAllocator *alloc)
 158 {
 159     QPCIBusSPAPR *ret;
 160
 161     ret = g_malloc(sizeof(*ret));
 162
 163     ret->alloc = alloc;
 164
 165     ret->bus.pio_readb = qpci_spapr_pio_readb;
 166     ret->bus.pio_readw = qpci_spapr_pio_readw;
 167     ret->bus.pio_readl = qpci_spapr_pio_readl;
 168     ret->bus.pio_readq = qpci_spapr_pio_readq;
 169
 170     ret->bus.pio_writeb = qpci_spapr_pio_writeb;
 171     ret->bus.pio_writew = qpci_spapr_pio_writew;
 172     ret->bus.pio_writel = qpci_spapr_pio_writel;
 173     ret->bus.pio_writeq = qpci_spapr_pio_writeq;
 174
 175     ret->bus.memread = qpci_spapr_memread;
 176     ret->bus.memwrite = qpci_spapr_memwrite;
 177
 178     ret->bus.config_readb = qpci_spapr_config_readb;
 179     ret->bus.config_readw = qpci_spapr_config_readw;
 180     ret->bus.config_readl = qpci_spapr_config_readl;
 181
 182     ret->bus.config_writeb = qpci_spapr_config_writeb;
 183     ret->bus.config_writew = qpci_spapr_config_writew;
 184     ret->bus.config_writel = qpci_spapr_config_writel;
 185
 186     /* FIXME: We assume the default location of the PHB for now.
 187      * Ideally we'd parse the device tree deposited in the guest to
 188      * get the window locations */
 189     ret->buid = 0x800000020000000ULL;
 190
 191     ret->pio_cpu_base = SPAPR_PCI_BASE;
 192     ret->pio.pci_base = 0;
 193     ret->pio.size = SPAPR_PCI_IO_WIN_SIZE;
 194
 195     /* 32-bit portion of the MMIO window is at PCI address 2..4 GiB */
 196     ret->mmio32_cpu_base = SPAPR_PCI_BASE;
 197     ret->mmio32.pci_base = SPAPR_PCI_MMIO32_WIN_SIZE;
 198     ret->mmio32.size = SPAPR_PCI_MMIO32_WIN_SIZE;
 199
 200     ret->bus.pio_alloc_ptr = 0xc000;
 201     ret->bus.mmio_alloc_ptr = ret->mmio32.pci_base;
 202     ret->bus.mmio_limit = ret->mmio32.pci_base + ret->mmio32.size;
 203
 204     return &ret->bus;
 205 }
 206
 207 void qpci_free_spapr(QPCIBus *bus)
 208 {
 209     QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
 210
 211     g_free(s);
 212 }