1 // Initialize PCI devices (on emulators)
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2006 Fabrice Bellard
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "byteorder.h" // le64_to_cpu
9 #include "config.h" // CONFIG_*
10 #include "dev-q35.h" // Q35_HOST_BRIDGE_PCIEXBAR_ADDR
11 #include "dev-piix.h" // PIIX_*
12 #include "e820map.h" // e820_add
13 #include "hw/ata.h" // PORT_ATA1_CMD_BASE
14 #include "hw/pci.h" // pci_config_readl
15 #include "hw/pci_ids.h" // PCI_VENDOR_ID_INTEL
16 #include "hw/pci_regs.h" // PCI_COMMAND
17 #include "list.h" // struct hlist_node
18 #include "malloc.h" // free
19 #include "output.h" // dprintf
20 #include "paravirt.h" // RamSize
21 #include "romfile.h" // romfile_loadint
22 #include "string.h" // memset
23 #include "util.h" // pci_setup
24 #include "x86.h" // outb
26 #define PCI_DEVICE_MEM_MIN (1<<12) // 4k == page size
27 #define PCI_BRIDGE_MEM_MIN (1<<21) // 2M == hugepage size
28 #define PCI_BRIDGE_IO_MIN 0x1000 // mandated by pci bridge spec
30 static const char *region_type_name[] = {
31 [ PCI_REGION_TYPE_IO ] = "io",
32 [ PCI_REGION_TYPE_MEM ] = "mem",
33 [ PCI_REGION_TYPE_PREFMEM ] = "prefmem",
36 u64 pcimem_start = BUILD_PCIMEM_START;
37 u64 pcimem_end = BUILD_PCIMEM_END;
38 u64 pcimem64_start = BUILD_PCIMEM64_START;
39 u64 pcimem64_end = BUILD_PCIMEM64_END;
40 u64 pci_io_low_end = 0xa000;
42 struct pci_region_entry {
43 struct pci_device *dev;
48 enum pci_region_type type;
49 struct hlist_node node;
53 /* pci region assignments */
55 struct hlist_head list;
59 struct pci_region r[PCI_REGION_TYPE_COUNT];
60 struct pci_device *bus_dev;
63 static u32 pci_bar(struct pci_device *pci, int region_num)
65 if (region_num != PCI_ROM_SLOT) {
66 return PCI_BASE_ADDRESS_0 + region_num * 4;
69 #define PCI_HEADER_TYPE_MULTI_FUNCTION 0x80
70 u8 type = pci->header_type & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
71 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
75 pci_set_io_region_addr(struct pci_device *pci, int bar, u64 addr, int is64)
77 u32 ofs = pci_bar(pci, bar);
78 pci_config_writel(pci->bdf, ofs, addr);
80 pci_config_writel(pci->bdf, ofs + 4, addr >> 32);
84 /****************************************************************
86 ****************************************************************/
88 /* host irqs corresponding to PCI irqs A-D */
89 const u8 pci_irqs[4] = {
93 static int dummy_pci_slot_get_irq(struct pci_device *pci, int pin)
95 dprintf(1, "pci_slot_get_irq called with unknown routing\n");
97 return 0xff; /* PCI defined "unknown" or "no connection" for x86 */
100 static int (*pci_slot_get_irq)(struct pci_device *pci, int pin) =
101 dummy_pci_slot_get_irq;
103 // Return the global irq number corresponding to a host bus device irq pin.
104 static int piix_pci_slot_get_irq(struct pci_device *pci, int pin)
108 while (pci->parent != NULL) {
109 slot_addend += pci_bdf_to_dev(pci->bdf);
112 slot_addend += pci_bdf_to_dev(pci->bdf) - 1;
113 return pci_irqs[(pin - 1 + slot_addend) & 3];
116 static int mch_pci_slot_get_irq(struct pci_device *pci, int pin)
119 while (pci->parent != NULL) {
120 pin_addend += pci_bdf_to_dev(pci->bdf);
123 u8 slot = pci_bdf_to_dev(pci->bdf);
125 /* Slots 0-24 rotate slot:pin mapping similar to piix above, but
126 with a different starting index - see q35-acpi-dsdt.dsl */
127 return pci_irqs[(pin - 1 + pin_addend + slot) & 3];
128 /* Slots 25-31 all use LNKA mapping (or LNKE, but A:D = E:H) */
129 return pci_irqs[(pin - 1 + pin_addend) & 3];
132 /* PIIX3/PIIX4 PCI to ISA bridge */
133 static void piix_isa_bridge_setup(struct pci_device *pci, void *arg)
140 for (i = 0; i < 4; i++) {
142 /* set to trigger level */
143 elcr[irq >> 3] |= (1 << (irq & 7));
144 /* activate irq remapping in PIIX */
145 pci_config_writeb(pci->bdf, 0x60 + i, irq);
147 outb(elcr[0], PIIX_PORT_ELCR1);
148 outb(elcr[1], PIIX_PORT_ELCR2);
149 dprintf(1, "PIIX3/PIIX4 init: elcr=%02x %02x\n", elcr[0], elcr[1]);
152 /* ICH9 LPC PCI to ISA bridge */
153 /* PCI_VENDOR_ID_INTEL && PCI_DEVICE_ID_INTEL_ICH9_LPC */
154 static void mch_isa_bridge_setup(struct pci_device *dev, void *arg)
163 for (i = 0; i < 4; i++) {
165 /* set to trigger level */
166 elcr[irq >> 3] |= (1 << (irq & 7));
168 /* activate irq remapping in LPC */
170 /* PIRQ[A-D] routing */
171 pci_config_writeb(bdf, ICH9_LPC_PIRQA_ROUT + i, irq);
172 /* PIRQ[E-H] routing */
173 pci_config_writeb(bdf, ICH9_LPC_PIRQE_ROUT + i, irq);
175 outb(elcr[0], ICH9_LPC_PORT_ELCR1);
176 outb(elcr[1], ICH9_LPC_PORT_ELCR2);
177 dprintf(1, "Q35 LPC init: elcr=%02x %02x\n", elcr[0], elcr[1]);
180 pci_config_writel(bdf, ICH9_LPC_PMBASE,
181 acpi_pm_base | ICH9_LPC_PMBASE_RTE);
183 /* acpi enable, SCI: IRQ9 000b = irq9*/
184 pci_config_writeb(bdf, ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_ACPI_EN);
186 /* set root complex register block BAR */
187 pci_config_writel(bdf, ICH9_LPC_RCBA,
188 ICH9_LPC_RCBA_ADDR | ICH9_LPC_RCBA_EN);
189 e820_add(ICH9_LPC_RCBA_ADDR, 16*1024, E820_RESERVED);
191 acpi_pm1a_cnt = acpi_pm_base + 0x04;
192 pmtimer_setup(acpi_pm_base + 0x08);
195 static void storage_ide_setup(struct pci_device *pci, void *arg)
197 /* IDE: we map it as in ISA mode */
198 pci_set_io_region_addr(pci, 0, PORT_ATA1_CMD_BASE, 0);
199 pci_set_io_region_addr(pci, 1, PORT_ATA1_CTRL_BASE, 0);
200 pci_set_io_region_addr(pci, 2, PORT_ATA2_CMD_BASE, 0);
201 pci_set_io_region_addr(pci, 3, PORT_ATA2_CTRL_BASE, 0);
204 /* PIIX3/PIIX4 IDE */
205 static void piix_ide_setup(struct pci_device *pci, void *arg)
208 pci_config_writew(bdf, 0x40, 0x8000); // enable IDE0
209 pci_config_writew(bdf, 0x42, 0x8000); // enable IDE1
212 static void pic_ibm_setup(struct pci_device *pci, void *arg)
214 /* PIC, IBM, MPIC & MPIC2 */
215 pci_set_io_region_addr(pci, 0, 0x80800000 + 0x00040000, 0);
218 static void apple_macio_setup(struct pci_device *pci, void *arg)
221 pci_set_io_region_addr(pci, 0, 0x80800000, 0);
224 static void piix4_pm_config_setup(u16 bdf)
226 // acpi sci is hardwired to 9
227 pci_config_writeb(bdf, PCI_INTERRUPT_LINE, 9);
229 pci_config_writel(bdf, PIIX_PMBASE, acpi_pm_base | 1);
230 pci_config_writeb(bdf, PIIX_PMREGMISC, 0x01); /* enable PM io space */
231 pci_config_writel(bdf, PIIX_SMBHSTBASE, (acpi_pm_base + 0x100) | 1);
232 pci_config_writeb(bdf, PIIX_SMBHSTCFG, 0x09); /* enable SMBus io space */
235 static int PiixPmBDF = -1;
237 /* PIIX4 Power Management device (for ACPI) */
238 static void piix4_pm_setup(struct pci_device *pci, void *arg)
240 PiixPmBDF = pci->bdf;
241 piix4_pm_config_setup(pci->bdf);
243 acpi_pm1a_cnt = acpi_pm_base + 0x04;
244 pmtimer_setup(acpi_pm_base + 0x08);
248 /* PCI_VENDOR_ID_INTEL && PCI_DEVICE_ID_INTEL_ICH9_SMBUS */
249 static void ich9_smbus_setup(struct pci_device *dev, void *arg)
252 /* map smbus into io space */
253 pci_config_writel(bdf, ICH9_SMB_SMB_BASE,
254 (acpi_pm_base + 0x100) | PCI_BASE_ADDRESS_SPACE_IO);
257 pci_config_writeb(bdf, ICH9_SMB_HOSTC, ICH9_SMB_HOSTC_HST_EN);
260 static const struct pci_device_id pci_device_tbl[] = {
261 /* PIIX3/PIIX4 PCI to ISA bridge */
262 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0,
263 piix_isa_bridge_setup),
264 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
265 piix_isa_bridge_setup),
266 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_LPC,
267 mch_isa_bridge_setup),
270 PCI_DEVICE_CLASS(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1,
271 PCI_CLASS_STORAGE_IDE, piix_ide_setup),
272 PCI_DEVICE_CLASS(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB,
273 PCI_CLASS_STORAGE_IDE, piix_ide_setup),
274 PCI_DEVICE_CLASS(PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE,
277 /* PIC, IBM, MIPC & MPIC2 */
278 PCI_DEVICE_CLASS(PCI_VENDOR_ID_IBM, 0x0046, PCI_CLASS_SYSTEM_PIC,
280 PCI_DEVICE_CLASS(PCI_VENDOR_ID_IBM, 0xFFFF, PCI_CLASS_SYSTEM_PIC,
283 /* PIIX4 Power Management device (for ACPI) */
284 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3,
286 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_SMBUS,
290 PCI_DEVICE_CLASS(PCI_VENDOR_ID_APPLE, 0x0017, 0xff00, apple_macio_setup),
291 PCI_DEVICE_CLASS(PCI_VENDOR_ID_APPLE, 0x0022, 0xff00, apple_macio_setup),
296 void pci_resume(void)
302 if (PiixPmBDF >= 0) {
303 piix4_pm_config_setup(PiixPmBDF);
307 static void pci_bios_init_device(struct pci_device *pci)
310 dprintf(1, "PCI: init bdf=%02x:%02x.%x id=%04x:%04x\n"
311 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf)
312 , pci->vendor, pci->device);
314 /* map the interrupt */
315 int pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
317 pci_config_writeb(bdf, PCI_INTERRUPT_LINE, pci_slot_get_irq(pci, pin));
319 pci_init_device(pci_device_tbl, pci, NULL);
321 /* enable memory mappings */
322 pci_config_maskw(bdf, PCI_COMMAND, 0,
323 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_SERR);
324 /* enable SERR# for forwarding */
325 if (pci->header_type & PCI_HEADER_TYPE_BRIDGE)
326 pci_config_maskw(bdf, PCI_BRIDGE_CONTROL, 0,
327 PCI_BRIDGE_CTL_SERR);
330 static void pci_bios_init_devices(void)
332 struct pci_device *pci;
334 pci_bios_init_device(pci);
338 static void pci_enable_default_vga(void)
340 struct pci_device *pci;
343 if (is_pci_vga(pci)) {
344 dprintf(1, "PCI: Using %02x:%02x.%x for primary VGA\n",
345 pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf),
346 pci_bdf_to_fn(pci->bdf));
351 pci = pci_find_class(PCI_CLASS_DISPLAY_VGA);
353 dprintf(1, "PCI: No VGA devices found\n");
357 dprintf(1, "PCI: Enabling %02x:%02x.%x for primary VGA\n",
358 pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf),
359 pci_bdf_to_fn(pci->bdf));
361 pci_config_maskw(pci->bdf, PCI_COMMAND, 0,
362 PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
364 while (pci->parent) {
367 dprintf(1, "PCI: Setting VGA enable on bridge %02x:%02x.%x\n",
368 pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf),
369 pci_bdf_to_fn(pci->bdf));
371 pci_config_maskw(pci->bdf, PCI_BRIDGE_CONTROL, 0, PCI_BRIDGE_CTL_VGA);
372 pci_config_maskw(pci->bdf, PCI_COMMAND, 0,
373 PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
377 /****************************************************************
378 * Platform device initialization
379 ****************************************************************/
381 static void i440fx_mem_addr_setup(struct pci_device *dev, void *arg)
383 if (RamSize <= 0x80000000)
384 pcimem_start = 0x80000000;
385 else if (RamSize <= 0xc0000000)
386 pcimem_start = 0xc0000000;
388 pci_slot_get_irq = piix_pci_slot_get_irq;
391 static void mch_mem_addr_setup(struct pci_device *dev, void *arg)
393 u64 addr = Q35_HOST_BRIDGE_PCIEXBAR_ADDR;
394 u32 size = Q35_HOST_BRIDGE_PCIEXBAR_SIZE;
398 u32 upper = addr >> 32;
399 u32 lower = (addr & 0xffffffff) | Q35_HOST_BRIDGE_PCIEXBAREN;
400 pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR, 0);
401 pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR + 4, upper);
402 pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR, lower);
403 e820_add(addr, size, E820_RESERVED);
405 /* setup pci i/o window (above mmconfig) */
406 pcimem_start = addr + size;
408 pci_slot_get_irq = mch_pci_slot_get_irq;
410 /* setup io address space */
411 if (acpi_pm_base < 0x1000)
412 pci_io_low_end = 0x10000;
414 pci_io_low_end = acpi_pm_base;
417 static const struct pci_device_id pci_platform_tbl[] = {
418 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441,
419 i440fx_mem_addr_setup),
420 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_Q35_MCH,
425 static void pci_bios_init_platform(void)
427 struct pci_device *pci;
429 pci_init_device(pci_platform_tbl, pci, NULL);
434 /****************************************************************
436 ****************************************************************/
439 pci_bios_init_bus_rec(int bus, u8 *pci_bus)
444 dprintf(1, "PCI: %s bus = 0x%x\n", __func__, bus);
446 /* prevent accidental access to unintended devices */
447 foreachbdf(bdf, bus) {
448 class = pci_config_readw(bdf, PCI_CLASS_DEVICE);
449 if (class == PCI_CLASS_BRIDGE_PCI) {
450 pci_config_writeb(bdf, PCI_SECONDARY_BUS, 255);
451 pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, 0);
455 foreachbdf(bdf, bus) {
456 class = pci_config_readw(bdf, PCI_CLASS_DEVICE);
457 if (class != PCI_CLASS_BRIDGE_PCI) {
460 dprintf(1, "PCI: %s bdf = 0x%x\n", __func__, bdf);
462 u8 pribus = pci_config_readb(bdf, PCI_PRIMARY_BUS);
464 dprintf(1, "PCI: primary bus = 0x%x -> 0x%x\n", pribus, bus);
465 pci_config_writeb(bdf, PCI_PRIMARY_BUS, bus);
467 dprintf(1, "PCI: primary bus = 0x%x\n", pribus);
470 u8 secbus = pci_config_readb(bdf, PCI_SECONDARY_BUS);
472 if (*pci_bus != secbus) {
473 dprintf(1, "PCI: secondary bus = 0x%x -> 0x%x\n",
476 pci_config_writeb(bdf, PCI_SECONDARY_BUS, secbus);
478 dprintf(1, "PCI: secondary bus = 0x%x\n", secbus);
481 /* set to max for access to all subordinate buses.
482 later set it to accurate value */
483 u8 subbus = pci_config_readb(bdf, PCI_SUBORDINATE_BUS);
484 pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, 255);
486 pci_bios_init_bus_rec(secbus, pci_bus);
488 if (subbus != *pci_bus) {
489 dprintf(1, "PCI: subordinate bus = 0x%x -> 0x%x\n",
493 dprintf(1, "PCI: subordinate bus = 0x%x\n", subbus);
495 pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, subbus);
500 pci_bios_init_bus(void)
502 u8 extraroots = romfile_loadint("etc/extra-pci-roots", 0);
505 pci_bios_init_bus_rec(0 /* host bus */, &pci_bus);
508 while (pci_bus < 0xff) {
510 pci_bios_init_bus_rec(pci_bus, &pci_bus);
516 /****************************************************************
518 ****************************************************************/
521 pci_bios_get_bar(struct pci_device *pci, int bar,
522 int *ptype, u64 *psize, int *pis64)
524 u32 ofs = pci_bar(pci, bar);
526 u32 old = pci_config_readl(bdf, ofs);
527 int is64 = 0, type = PCI_REGION_TYPE_MEM;
530 if (bar == PCI_ROM_SLOT) {
531 mask = PCI_ROM_ADDRESS_MASK;
532 pci_config_writel(bdf, ofs, mask);
534 if (old & PCI_BASE_ADDRESS_SPACE_IO) {
535 mask = PCI_BASE_ADDRESS_IO_MASK;
536 type = PCI_REGION_TYPE_IO;
538 mask = PCI_BASE_ADDRESS_MEM_MASK;
539 if (old & PCI_BASE_ADDRESS_MEM_PREFETCH)
540 type = PCI_REGION_TYPE_PREFMEM;
541 is64 = ((old & PCI_BASE_ADDRESS_MEM_TYPE_MASK)
542 == PCI_BASE_ADDRESS_MEM_TYPE_64);
544 pci_config_writel(bdf, ofs, ~0);
546 u64 val = pci_config_readl(bdf, ofs);
547 pci_config_writel(bdf, ofs, old);
549 u32 hold = pci_config_readl(bdf, ofs + 4);
550 pci_config_writel(bdf, ofs + 4, ~0);
551 u32 high = pci_config_readl(bdf, ofs + 4);
552 pci_config_writel(bdf, ofs + 4, hold);
553 val |= ((u64)high << 32);
554 mask |= ((u64)0xffffffff << 32);
555 *psize = (~(val & mask)) + 1;
557 *psize = ((~(val & mask)) + 1) & 0xffffffff;
563 static int pci_bios_bridge_region_is64(struct pci_region *r,
564 struct pci_device *pci, int type)
566 if (type != PCI_REGION_TYPE_PREFMEM)
568 u32 pmem = pci_config_readl(pci->bdf, PCI_PREF_MEMORY_BASE);
570 pci_config_writel(pci->bdf, PCI_PREF_MEMORY_BASE, 0xfff0fff0);
571 pmem = pci_config_readl(pci->bdf, PCI_PREF_MEMORY_BASE);
572 pci_config_writel(pci->bdf, PCI_PREF_MEMORY_BASE, 0x0);
574 if ((pmem & PCI_PREF_RANGE_TYPE_MASK) != PCI_PREF_RANGE_TYPE_64)
576 struct pci_region_entry *entry;
577 hlist_for_each_entry(entry, &r->list, node) {
584 static u64 pci_region_align(struct pci_region *r)
586 struct pci_region_entry *entry;
587 hlist_for_each_entry(entry, &r->list, node) {
588 // The first entry in the sorted list has the largest alignment
594 static u64 pci_region_sum(struct pci_region *r)
597 struct pci_region_entry *entry;
598 hlist_for_each_entry(entry, &r->list, node) {
604 static void pci_region_migrate_64bit_entries(struct pci_region *from,
605 struct pci_region *to)
607 struct hlist_node *n, **last = &to->list.first;
608 struct pci_region_entry *entry;
609 hlist_for_each_entry_safe(entry, n, &from->list, node) {
612 if (entry->dev->class == PCI_CLASS_SERIAL_USB)
614 // Move from source list to destination list.
615 hlist_del(&entry->node);
616 hlist_add(&entry->node, last);
617 last = &entry->node.next;
621 static struct pci_region_entry *
622 pci_region_create_entry(struct pci_bus *bus, struct pci_device *dev,
623 int bar, u64 size, u64 align, int type, int is64)
625 struct pci_region_entry *entry = malloc_tmp(sizeof(*entry));
630 memset(entry, 0, sizeof(*entry));
634 entry->align = align;
637 // Insert into list in sorted order.
638 struct hlist_node **pprev;
639 struct pci_region_entry *pos;
640 hlist_for_each_entry_pprev(pos, pprev, &bus->r[type].list, node) {
641 if (pos->align < align || (pos->align == align && pos->size < size))
644 hlist_add(&entry->node, pprev);
648 static int pci_bus_hotplug_support(struct pci_bus *bus, u8 pcie_cap)
653 u16 pcie_flags = pci_config_readw(bus->bus_dev->bdf,
654 pcie_cap + PCI_EXP_FLAGS);
655 u8 port_type = ((pcie_flags & PCI_EXP_FLAGS_TYPE) >>
656 (__builtin_ffs(PCI_EXP_FLAGS_TYPE) - 1));
657 u8 downstream_port = (port_type == PCI_EXP_TYPE_DOWNSTREAM) ||
658 (port_type == PCI_EXP_TYPE_ROOT_PORT);
660 * PCI Express SPEC, 7.8.2:
661 * Slot Implemented – When Set, this bit indicates that the Link
662 * HwInit associated with this Port is connected to a slot (as
663 * compared to being connected to a system-integrated device or
665 * This bit is valid for Downstream Ports. This bit is undefined
666 * for Upstream Ports.
668 u16 slot_implemented = pcie_flags & PCI_EXP_FLAGS_SLOT;
670 return downstream_port && slot_implemented;
673 shpc_cap = pci_find_capability(bus->bus_dev, PCI_CAP_ID_SHPC, 0);
677 static int pci_bios_check_devices(struct pci_bus *busses)
679 dprintf(1, "PCI: check devices\n");
681 // Calculate resources needed for regular (non-bus) devices.
682 struct pci_device *pci;
684 if (pci->class == PCI_CLASS_BRIDGE_PCI)
685 busses[pci->secondary_bus].bus_dev = pci;
687 struct pci_bus *bus = &busses[pci_bdf_to_bus(pci->bdf)];
690 * Resources for all root busses go in busses[0]
694 for (i = 0; i < PCI_NUM_REGIONS; i++) {
695 if ((pci->class == PCI_CLASS_BRIDGE_PCI) &&
696 (i >= PCI_BRIDGE_NUM_REGIONS && i < PCI_ROM_SLOT))
700 pci_bios_get_bar(pci, i, &type, &size, &is64);
704 if (type != PCI_REGION_TYPE_IO && size < PCI_DEVICE_MEM_MIN)
705 size = PCI_DEVICE_MEM_MIN;
706 struct pci_region_entry *entry = pci_region_create_entry(
707 bus, pci, i, size, size, type, is64);
716 // Propagate required bus resources to parent busses.
718 for (secondary_bus=MaxPCIBus; secondary_bus>0; secondary_bus--) {
719 struct pci_bus *s = &busses[secondary_bus];
722 struct pci_bus *parent = &busses[pci_bdf_to_bus(s->bus_dev->bdf)];
723 if (!parent->bus_dev)
725 * Resources for all root busses go in busses[0]
729 u8 pcie_cap = pci_find_capability(s->bus_dev, PCI_CAP_ID_EXP, 0);
730 int hotplug_support = pci_bus_hotplug_support(s, pcie_cap);
731 for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) {
732 u64 align = (type == PCI_REGION_TYPE_IO) ?
733 PCI_BRIDGE_IO_MIN : PCI_BRIDGE_MEM_MIN;
734 if (!pci_bridge_has_region(s->bus_dev, type))
736 if (pci_region_align(&s->r[type]) > align)
737 align = pci_region_align(&s->r[type]);
738 u64 sum = pci_region_sum(&s->r[type]);
739 int resource_optional = pcie_cap && (type == PCI_REGION_TYPE_IO);
740 if (!sum && hotplug_support && !resource_optional)
741 sum = align; /* reserve min size for hot-plug */
742 u64 size = ALIGN(sum, align);
743 int is64 = pci_bios_bridge_region_is64(&s->r[type],
745 // entry->bar is -1 if the entry represents a bridge region
746 struct pci_region_entry *entry = pci_region_create_entry(
747 parent, s->bus_dev, -1, size, align, type, is64);
750 dprintf(1, "PCI: secondary bus %d size %08llx type %s\n",
751 entry->dev->secondary_bus, size,
752 region_type_name[entry->type]);
759 /****************************************************************
761 ****************************************************************/
763 // Setup region bases (given the regions' size and alignment)
764 static int pci_bios_init_root_regions_io(struct pci_bus *bus)
767 * QEMU I/O address space usage:
768 * 0000 - 0fff legacy isa, pci config, pci root bus, ...
770 * a000 - afff hotplug (cpu, pci via acpi, i440fx/piix only)
771 * b000 - bfff power management (PORT_ACPI_PM_BASE)
772 * [ qemu 1.4+ implements pci config registers
773 * properly so guests can place the registers
774 * where they want, on older versions its fixed ]
775 * c000 - ffff free, traditionally used for pci io
777 struct pci_region *r_io = &bus->r[PCI_REGION_TYPE_IO];
778 u64 sum = pci_region_sum(r_io);
780 /* traditional region is big enougth, use it */
782 } else if (sum < pci_io_low_end - 0x1000) {
783 /* use the larger region at 0x1000 */
786 /* not enouth io address space -> error out */
789 dprintf(1, "PCI: IO: %4llx - %4llx\n", r_io->base, r_io->base + sum - 1);
793 static int pci_bios_init_root_regions_mem(struct pci_bus *bus)
795 struct pci_region *r_end = &bus->r[PCI_REGION_TYPE_PREFMEM];
796 struct pci_region *r_start = &bus->r[PCI_REGION_TYPE_MEM];
798 if (pci_region_align(r_start) < pci_region_align(r_end)) {
799 // Swap regions to improve alignment.
801 r_start = &bus->r[PCI_REGION_TYPE_PREFMEM];
803 u64 sum = pci_region_sum(r_end);
804 u64 align = pci_region_align(r_end);
805 r_end->base = ALIGN_DOWN((pcimem_end - sum), align);
806 sum = pci_region_sum(r_start);
807 align = pci_region_align(r_start);
808 r_start->base = ALIGN_DOWN((r_end->base - sum), align);
810 if ((r_start->base < pcimem_start) ||
811 (r_start->base > pcimem_end))
812 // Memory range requested is larger than available.
817 #define PCI_IO_SHIFT 8
818 #define PCI_MEMORY_SHIFT 16
819 #define PCI_PREF_MEMORY_SHIFT 16
822 pci_region_map_one_entry(struct pci_region_entry *entry, u64 addr)
824 u16 bdf = entry->dev->bdf;
825 if (entry->bar >= 0) {
826 dprintf(1, "PCI: map device bdf=%02x:%02x.%x"
827 " bar %d, addr %08llx, size %08llx [%s]\n",
828 pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf),
829 entry->bar, addr, entry->size, region_type_name[entry->type]);
831 pci_set_io_region_addr(entry->dev, entry->bar, addr, entry->is64);
835 u64 limit = addr + entry->size - 1;
836 if (entry->type == PCI_REGION_TYPE_IO) {
837 pci_config_writeb(bdf, PCI_IO_BASE, addr >> PCI_IO_SHIFT);
838 pci_config_writew(bdf, PCI_IO_BASE_UPPER16, 0);
839 pci_config_writeb(bdf, PCI_IO_LIMIT, limit >> PCI_IO_SHIFT);
840 pci_config_writew(bdf, PCI_IO_LIMIT_UPPER16, 0);
842 if (entry->type == PCI_REGION_TYPE_MEM) {
843 pci_config_writew(bdf, PCI_MEMORY_BASE, addr >> PCI_MEMORY_SHIFT);
844 pci_config_writew(bdf, PCI_MEMORY_LIMIT, limit >> PCI_MEMORY_SHIFT);
846 if (entry->type == PCI_REGION_TYPE_PREFMEM) {
847 pci_config_writew(bdf, PCI_PREF_MEMORY_BASE, addr >> PCI_PREF_MEMORY_SHIFT);
848 pci_config_writew(bdf, PCI_PREF_MEMORY_LIMIT, limit >> PCI_PREF_MEMORY_SHIFT);
849 pci_config_writel(bdf, PCI_PREF_BASE_UPPER32, addr >> 32);
850 pci_config_writel(bdf, PCI_PREF_LIMIT_UPPER32, limit >> 32);
854 static void pci_region_map_entries(struct pci_bus *busses, struct pci_region *r)
856 struct hlist_node *n;
857 struct pci_region_entry *entry;
858 hlist_for_each_entry_safe(entry, n, &r->list, node) {
860 r->base += entry->size;
861 if (entry->bar == -1)
862 // Update bus base address if entry is a bridge region
863 busses[entry->dev->secondary_bus].r[entry->type].base = addr;
864 pci_region_map_one_entry(entry, addr);
865 hlist_del(&entry->node);
870 static void pci_bios_map_devices(struct pci_bus *busses)
872 if (pci_bios_init_root_regions_io(busses))
873 panic("PCI: out of I/O address space\n");
875 dprintf(1, "PCI: 32: %016llx - %016llx\n", pcimem_start, pcimem_end);
876 if (pci_bios_init_root_regions_mem(busses)) {
877 struct pci_region r64_mem, r64_pref;
878 r64_mem.list.first = NULL;
879 r64_pref.list.first = NULL;
880 pci_region_migrate_64bit_entries(&busses[0].r[PCI_REGION_TYPE_MEM],
882 pci_region_migrate_64bit_entries(&busses[0].r[PCI_REGION_TYPE_PREFMEM],
885 if (pci_bios_init_root_regions_mem(busses))
886 panic("PCI: out of 32bit address space\n");
888 u64 sum_mem = pci_region_sum(&r64_mem);
889 u64 sum_pref = pci_region_sum(&r64_pref);
890 u64 align_mem = pci_region_align(&r64_mem);
891 u64 align_pref = pci_region_align(&r64_pref);
893 r64_mem.base = le64_to_cpu(romfile_loadint("etc/reserved-memory-end", 0));
894 if (r64_mem.base < 0x100000000LL + RamSizeOver4G)
895 r64_mem.base = 0x100000000LL + RamSizeOver4G;
896 r64_mem.base = ALIGN(r64_mem.base, align_mem);
897 r64_mem.base = ALIGN(r64_mem.base, (1LL<<30)); // 1G hugepage
898 r64_pref.base = r64_mem.base + sum_mem;
899 r64_pref.base = ALIGN(r64_pref.base, align_pref);
900 r64_pref.base = ALIGN(r64_pref.base, (1LL<<30)); // 1G hugepage
901 pcimem64_start = r64_mem.base;
902 pcimem64_end = r64_pref.base + sum_pref;
903 pcimem64_end = ALIGN(pcimem64_end, (1LL<<30)); // 1G hugepage
904 dprintf(1, "PCI: 64: %016llx - %016llx\n", pcimem64_start, pcimem64_end);
906 pci_region_map_entries(busses, &r64_mem);
907 pci_region_map_entries(busses, &r64_pref);
909 // no bars mapped high -> drop 64bit window (see dsdt)
912 // Map regions on each device.
914 for (bus = 0; bus<=MaxPCIBus; bus++) {
916 for (type = 0; type < PCI_REGION_TYPE_COUNT; type++)
917 pci_region_map_entries(busses, &busses[bus].r[type]);
922 /****************************************************************
924 ****************************************************************/
932 dprintf(3, "pci setup\n");
934 dprintf(1, "=== PCI bus & bridge init ===\n");
935 if (pci_probe_host() != 0) {
940 dprintf(1, "=== PCI device probing ===\n");
943 pcimem_start = RamSize;
944 pci_bios_init_platform();
946 dprintf(1, "=== PCI new allocation pass #1 ===\n");
947 struct pci_bus *busses = malloc_tmp(sizeof(*busses) * (MaxPCIBus + 1));
952 memset(busses, 0, sizeof(*busses) * (MaxPCIBus + 1));
953 if (pci_bios_check_devices(busses))
956 dprintf(1, "=== PCI new allocation pass #2 ===\n");
957 pci_bios_map_devices(busses);
959 pci_bios_init_devices();
963 pci_enable_default_vga();