2 * QEMU sPAPR PCI host originated from Uninorth PCI host
4 * Copyright (c) 2011 Alexey Kardashevskiy, IBM Corporation.
5 * Copyright (C) 2011 David Gibson, IBM Corporation.
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
29 #include "hw/spapr_pci.h"
30 #include "exec-memory.h"
33 #include "hw/pci_internals.h"
35 static PCIDevice *find_dev(sPAPREnvironment *spapr,
36 uint64_t buid, uint32_t config_addr)
39 int devfn = (config_addr >> 8) & 0xFF;
42 QLIST_FOREACH(phb, &spapr->phbs, list) {
43 if (phb->buid != buid) {
47 QTAILQ_FOREACH(qdev, &phb->host_state.bus->qbus.children, sibling) {
48 PCIDevice *dev = (PCIDevice *)qdev;
49 if (dev->devfn == devfn) {
58 static uint32_t rtas_pci_cfgaddr(uint32_t arg)
60 return ((arg >> 20) & 0xf00) | (arg & 0xff);
63 static uint32_t rtas_read_pci_config_do(PCIDevice *pci_dev, uint32_t addr,
64 uint32_t limit, uint32_t len)
66 if ((addr + len) <= limit) {
67 return pci_host_config_read_common(pci_dev, addr, limit, len);
73 static void rtas_write_pci_config_do(PCIDevice *pci_dev, uint32_t addr,
74 uint32_t limit, uint32_t val,
77 if ((addr + len) <= limit) {
78 pci_host_config_write_common(pci_dev, addr, limit, val, len);
82 static void rtas_ibm_read_pci_config(sPAPREnvironment *spapr,
83 uint32_t token, uint32_t nargs,
85 uint32_t nret, target_ulong rets)
87 uint32_t val, size, addr;
88 uint64_t buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
89 PCIDevice *dev = find_dev(spapr, buid, rtas_ld(args, 0));
95 size = rtas_ld(args, 3);
96 addr = rtas_pci_cfgaddr(rtas_ld(args, 0));
97 val = rtas_read_pci_config_do(dev, addr, pci_config_size(dev), size);
99 rtas_st(rets, 1, val);
102 static void rtas_read_pci_config(sPAPREnvironment *spapr,
103 uint32_t token, uint32_t nargs,
105 uint32_t nret, target_ulong rets)
107 uint32_t val, size, addr;
108 PCIDevice *dev = find_dev(spapr, 0, rtas_ld(args, 0));
111 rtas_st(rets, 0, -1);
114 size = rtas_ld(args, 1);
115 addr = rtas_pci_cfgaddr(rtas_ld(args, 0));
116 val = rtas_read_pci_config_do(dev, addr, pci_config_size(dev), size);
118 rtas_st(rets, 1, val);
121 static void rtas_ibm_write_pci_config(sPAPREnvironment *spapr,
122 uint32_t token, uint32_t nargs,
124 uint32_t nret, target_ulong rets)
126 uint32_t val, size, addr;
127 uint64_t buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
128 PCIDevice *dev = find_dev(spapr, buid, rtas_ld(args, 0));
131 rtas_st(rets, 0, -1);
134 val = rtas_ld(args, 4);
135 size = rtas_ld(args, 3);
136 addr = rtas_pci_cfgaddr(rtas_ld(args, 0));
137 rtas_write_pci_config_do(dev, addr, pci_config_size(dev), val, size);
141 static void rtas_write_pci_config(sPAPREnvironment *spapr,
142 uint32_t token, uint32_t nargs,
144 uint32_t nret, target_ulong rets)
146 uint32_t val, size, addr;
147 PCIDevice *dev = find_dev(spapr, 0, rtas_ld(args, 0));
150 rtas_st(rets, 0, -1);
153 val = rtas_ld(args, 2);
154 size = rtas_ld(args, 1);
155 addr = rtas_pci_cfgaddr(rtas_ld(args, 0));
156 rtas_write_pci_config_do(dev, addr, pci_config_size(dev), val, size);
160 static int pci_spapr_map_irq(PCIDevice *pci_dev, int irq_num)
163 * Here we need to convert pci_dev + irq_num to some unique value
164 * which is less than number of IRQs on the specific bus (now it
165 * is 16). At the moment irq_num == device_id (number of the
167 * FIXME: we should swizzle in fn and irq_num
169 return (pci_dev->devfn >> 3) % SPAPR_PCI_NUM_LSI;
172 static void pci_spapr_set_irq(void *opaque, int irq_num, int level)
175 * Here we use the number returned by pci_spapr_map_irq to find a
176 * corresponding qemu_irq.
178 sPAPRPHBState *phb = opaque;
180 qemu_set_irq(phb->lsi_table[irq_num].qirq, level);
183 static int spapr_phb_init(SysBusDevice *s)
185 sPAPRPHBState *phb = FROM_SYSBUS(sPAPRPHBState, s);
188 /* Initialize the LSI table */
189 for (i = 0; i < SPAPR_PCI_NUM_LSI; i++) {
193 qirq = spapr_allocate_irq(0, &num);
198 phb->lsi_table[i].dt_irq = num;
199 phb->lsi_table[i].qirq = qirq;
205 static int spapr_main_pci_host_init(PCIDevice *d)
210 static void spapr_main_pci_host_class_init(ObjectClass *klass, void *data)
212 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
214 k->init = spapr_main_pci_host_init;
217 static TypeInfo spapr_main_pci_host_info = {
218 .name = "spapr-pci-host-bridge-pci",
219 .parent = TYPE_PCI_DEVICE,
220 .instance_size = sizeof(PCIDevice),
221 .class_init = spapr_main_pci_host_class_init,
224 static void spapr_phb_class_init(ObjectClass *klass, void *data)
226 SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
228 sdc->init = spapr_phb_init;
231 static TypeInfo spapr_phb_info = {
232 .name = "spapr-pci-host-bridge",
233 .parent = TYPE_SYS_BUS_DEVICE,
234 .instance_size = sizeof(sPAPRPHBState),
235 .class_init = spapr_phb_class_init,
238 static void spapr_register_types(void)
240 type_register_static(&spapr_phb_info);
241 type_register_static(&spapr_main_pci_host_info);
244 type_init(spapr_register_types)
246 static uint64_t spapr_io_read(void *opaque, target_phys_addr_t addr,
251 return cpu_inb(addr);
253 return cpu_inw(addr);
255 return cpu_inl(addr);
260 static void spapr_io_write(void *opaque, target_phys_addr_t addr,
261 uint64_t data, unsigned size)
265 cpu_outb(addr, data);
268 cpu_outw(addr, data);
271 cpu_outl(addr, data);
277 static const MemoryRegionOps spapr_io_ops = {
278 .endianness = DEVICE_LITTLE_ENDIAN,
279 .read = spapr_io_read,
280 .write = spapr_io_write
283 void spapr_create_phb(sPAPREnvironment *spapr,
284 const char *busname, uint64_t buid,
285 uint64_t mem_win_addr, uint64_t mem_win_size,
286 uint64_t io_win_addr)
292 char namebuf[strlen(busname)+11];
294 dev = qdev_create(NULL, "spapr-pci-host-bridge");
295 qdev_init_nofail(dev);
296 s = sysbus_from_qdev(dev);
297 phb = FROM_SYSBUS(sPAPRPHBState, s);
299 phb->mem_win_addr = mem_win_addr;
301 sprintf(namebuf, "%s-mem", busname);
302 memory_region_init(&phb->memspace, namebuf, INT64_MAX);
304 sprintf(namebuf, "%s-memwindow", busname);
305 memory_region_init_alias(&phb->memwindow, namebuf, &phb->memspace,
306 SPAPR_PCI_MEM_WIN_BUS_OFFSET, mem_win_size);
307 memory_region_add_subregion(get_system_memory(), mem_win_addr,
310 phb->io_win_addr = io_win_addr;
312 /* On ppc, we only have MMIO no specific IO space from the CPU
313 * perspective. In theory we ought to be able to embed the PCI IO
314 * memory region direction in the system memory space. However,
315 * if any of the IO BAR subregions use the old_portio mechanism,
316 * that won't be processed properly unless accessed from the
317 * system io address space. This hack to bounce things via
318 * system_io works around the problem until all the users of
319 * old_portion are updated */
320 sprintf(namebuf, "%s-io", busname);
321 memory_region_init(&phb->iospace, namebuf, SPAPR_PCI_IO_WIN_SIZE);
322 /* FIXME: fix to support multiple PHBs */
323 memory_region_add_subregion(get_system_io(), 0, &phb->iospace);
325 sprintf(namebuf, "%s-iowindow", busname);
326 memory_region_init_io(&phb->iowindow, &spapr_io_ops, phb,
327 namebuf, SPAPR_PCI_IO_WIN_SIZE);
328 memory_region_add_subregion(get_system_memory(), io_win_addr,
331 phb->host_state.bus = bus = pci_register_bus(&phb->busdev.qdev, busname,
335 &phb->memspace, &phb->iospace,
339 spapr_rtas_register("read-pci-config", rtas_read_pci_config);
340 spapr_rtas_register("write-pci-config", rtas_write_pci_config);
341 spapr_rtas_register("ibm,read-pci-config", rtas_ibm_read_pci_config);
342 spapr_rtas_register("ibm,write-pci-config", rtas_ibm_write_pci_config);
344 QLIST_INSERT_HEAD(&spapr->phbs, phb, list);
346 /* pci_bus_set_mem_base(bus, mem_va_start - SPAPR_PCI_MEM_BAR_START); */
349 /* Macros to operate with address in OF binding to PCI */
350 #define b_x(x, p, l) (((x) & ((1<<(l))-1)) << (p))
351 #define b_n(x) b_x((x), 31, 1) /* 0 if relocatable */
352 #define b_p(x) b_x((x), 30, 1) /* 1 if prefetchable */
353 #define b_t(x) b_x((x), 29, 1) /* 1 if the address is aliased */
354 #define b_ss(x) b_x((x), 24, 2) /* the space code */
355 #define b_bbbbbbbb(x) b_x((x), 16, 8) /* bus number */
356 #define b_ddddd(x) b_x((x), 11, 5) /* device number */
357 #define b_fff(x) b_x((x), 8, 3) /* function number */
358 #define b_rrrrrrrr(x) b_x((x), 0, 8) /* register number */
360 int spapr_populate_pci_devices(sPAPRPHBState *phb,
361 uint32_t xics_phandle,
364 PCIBus *bus = phb->host_state.bus;
367 uint32_t bus_range[] = { cpu_to_be32(0), cpu_to_be32(0xff) };
373 } __attribute__((packed)) ranges[] = {
375 cpu_to_be32(b_ss(1)), cpu_to_be64(0),
376 cpu_to_be64(phb->io_win_addr),
377 cpu_to_be64(memory_region_size(&phb->iospace)),
380 cpu_to_be32(b_ss(2)), cpu_to_be64(SPAPR_PCI_MEM_WIN_BUS_OFFSET),
381 cpu_to_be64(phb->mem_win_addr),
382 cpu_to_be64(memory_region_size(&phb->memwindow)),
385 uint64_t bus_reg[] = { cpu_to_be64(phb->buid), 0 };
386 uint32_t interrupt_map_mask[] = {
387 cpu_to_be32(b_ddddd(-1)|b_fff(0)), 0x0, 0x0, 0x0};
388 uint32_t interrupt_map[bus->nirq][7];
390 /* Start populating the FDT */
391 sprintf(nodename, "pci@%" PRIx64, phb->buid);
392 bus_off = fdt_add_subnode(fdt, 0, nodename);
405 /* Write PHB properties */
406 _FDT(fdt_setprop_string(fdt, bus_off, "device_type", "pci"));
407 _FDT(fdt_setprop_string(fdt, bus_off, "compatible", "IBM,Logical_PHB"));
408 _FDT(fdt_setprop_cell(fdt, bus_off, "#address-cells", 0x3));
409 _FDT(fdt_setprop_cell(fdt, bus_off, "#size-cells", 0x2));
410 _FDT(fdt_setprop_cell(fdt, bus_off, "#interrupt-cells", 0x1));
411 _FDT(fdt_setprop(fdt, bus_off, "used-by-rtas", NULL, 0));
412 _FDT(fdt_setprop(fdt, bus_off, "bus-range", &bus_range, sizeof(bus_range)));
413 _FDT(fdt_setprop(fdt, bus_off, "ranges", &ranges, sizeof(ranges)));
414 _FDT(fdt_setprop(fdt, bus_off, "reg", &bus_reg, sizeof(bus_reg)));
415 _FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pci-config-space-type", 0x1));
417 /* Build the interrupt-map, this must matches what is done
418 * in pci_spapr_map_irq
420 _FDT(fdt_setprop(fdt, bus_off, "interrupt-map-mask",
421 &interrupt_map_mask, sizeof(interrupt_map_mask)));
422 for (i = 0; i < 7; i++) {
423 uint32_t *irqmap = interrupt_map[i];
424 irqmap[0] = cpu_to_be32(b_ddddd(i)|b_fff(0));
428 irqmap[4] = cpu_to_be32(xics_phandle);
429 irqmap[5] = cpu_to_be32(phb->lsi_table[i % SPAPR_PCI_NUM_LSI].dt_irq);
430 irqmap[6] = cpu_to_be32(0x8);
432 /* Write interrupt map */
433 _FDT(fdt_setprop(fdt, bus_off, "interrupt-map", &interrupt_map,
434 7 * sizeof(interrupt_map[0])));