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/*
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* QEMU PCI bus manager
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*
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* Copyright (c) 2004 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "vl.h" |
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//#define DEBUG_PCI
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struct PCIBus {
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int bus_num;
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int devfn_min;
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pci_set_irq_fn set_irq; |
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pci_map_irq_fn map_irq; |
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uint32_t config_reg; /* XXX: suppress */
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/* low level pic */
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SetIRQFunc *low_set_irq; |
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void *irq_opaque;
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PCIDevice *devices[256];
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PCIDevice *parent_dev; |
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PCIBus *next; |
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/* The bus IRQ state is the logical OR of the connected devices.
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Keep a count of the number of devices with raised IRQs. */
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int irq_count[];
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}; |
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static void pci_update_mappings(PCIDevice *d); |
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target_phys_addr_t pci_mem_base; |
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static int pci_irq_index; |
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static PCIBus *first_bus;
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|
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PCIBus *pci_register_bus(pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, |
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void *pic, int devfn_min, int nirq) |
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{ |
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PCIBus *bus; |
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bus = qemu_mallocz(sizeof(PCIBus) + (nirq * sizeof(int))); |
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bus->set_irq = set_irq; |
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bus->map_irq = map_irq; |
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bus->irq_opaque = pic; |
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bus->devfn_min = devfn_min; |
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first_bus = bus; |
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return bus;
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} |
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PCIBus *pci_register_secondary_bus(PCIDevice *dev, pci_map_irq_fn map_irq) |
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{ |
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PCIBus *bus; |
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bus = qemu_mallocz(sizeof(PCIBus));
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bus->map_irq = map_irq; |
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bus->parent_dev = dev; |
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bus->next = dev->bus->next; |
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dev->bus->next = bus; |
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return bus;
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} |
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int pci_bus_num(PCIBus *s)
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{ |
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return s->bus_num;
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} |
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void pci_device_save(PCIDevice *s, QEMUFile *f)
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{ |
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qemu_put_be32(f, 1); /* PCI device version */ |
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qemu_put_buffer(f, s->config, 256);
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} |
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int pci_device_load(PCIDevice *s, QEMUFile *f)
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{ |
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uint32_t version_id; |
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version_id = qemu_get_be32(f); |
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if (version_id != 1) |
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return -EINVAL;
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qemu_get_buffer(f, s->config, 256);
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pci_update_mappings(s); |
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return 0; |
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} |
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/* -1 for devfn means auto assign */
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PCIDevice *pci_register_device(PCIBus *bus, const char *name, |
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int instance_size, int devfn, |
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PCIConfigReadFunc *config_read, |
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PCIConfigWriteFunc *config_write) |
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{ |
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PCIDevice *pci_dev; |
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if (pci_irq_index >= PCI_DEVICES_MAX)
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return NULL; |
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if (devfn < 0) { |
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for(devfn = bus->devfn_min ; devfn < 256; devfn += 8) { |
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if (!bus->devices[devfn])
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goto found;
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} |
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return NULL; |
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found: ;
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} |
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pci_dev = qemu_mallocz(instance_size); |
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if (!pci_dev)
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return NULL; |
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pci_dev->bus = bus; |
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pci_dev->devfn = devfn; |
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pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
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memset(pci_dev->irq_state, 0, sizeof(pci_dev->irq_state)); |
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if (!config_read)
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config_read = pci_default_read_config; |
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if (!config_write)
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config_write = pci_default_write_config; |
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pci_dev->config_read = config_read; |
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pci_dev->config_write = config_write; |
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pci_dev->irq_index = pci_irq_index++; |
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bus->devices[devfn] = pci_dev; |
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return pci_dev;
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} |
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void pci_register_io_region(PCIDevice *pci_dev, int region_num, |
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uint32_t size, int type,
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PCIMapIORegionFunc *map_func) |
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{ |
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PCIIORegion *r; |
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uint32_t addr; |
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if ((unsigned int)region_num >= PCI_NUM_REGIONS) |
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return;
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r = &pci_dev->io_regions[region_num]; |
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r->addr = -1;
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r->size = size; |
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r->type = type; |
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r->map_func = map_func; |
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if (region_num == PCI_ROM_SLOT) {
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addr = 0x30;
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} else {
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addr = 0x10 + region_num * 4; |
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} |
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*(uint32_t *)(pci_dev->config + addr) = cpu_to_le32(type); |
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} |
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target_phys_addr_t pci_to_cpu_addr(target_phys_addr_t addr) |
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{ |
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return addr + pci_mem_base;
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} |
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static void pci_update_mappings(PCIDevice *d) |
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{ |
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PCIIORegion *r; |
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int cmd, i;
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uint32_t last_addr, new_addr, config_ofs; |
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cmd = le16_to_cpu(*(uint16_t *)(d->config + PCI_COMMAND)); |
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for(i = 0; i < PCI_NUM_REGIONS; i++) { |
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r = &d->io_regions[i]; |
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if (i == PCI_ROM_SLOT) {
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config_ofs = 0x30;
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} else {
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config_ofs = 0x10 + i * 4; |
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} |
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if (r->size != 0) { |
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if (r->type & PCI_ADDRESS_SPACE_IO) {
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if (cmd & PCI_COMMAND_IO) {
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new_addr = le32_to_cpu(*(uint32_t *)(d->config + |
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config_ofs)); |
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new_addr = new_addr & ~(r->size - 1);
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last_addr = new_addr + r->size - 1;
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/* NOTE: we have only 64K ioports on PC */
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if (last_addr <= new_addr || new_addr == 0 || |
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last_addr >= 0x10000) {
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new_addr = -1;
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} |
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} else {
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new_addr = -1;
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} |
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} else {
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if (cmd & PCI_COMMAND_MEMORY) {
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new_addr = le32_to_cpu(*(uint32_t *)(d->config + |
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config_ofs)); |
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/* the ROM slot has a specific enable bit */
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if (i == PCI_ROM_SLOT && !(new_addr & 1)) |
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goto no_mem_map;
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new_addr = new_addr & ~(r->size - 1);
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last_addr = new_addr + r->size - 1;
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/* NOTE: we do not support wrapping */
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/* XXX: as we cannot support really dynamic
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mappings, we handle specific values as invalid
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mappings. */
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if (last_addr <= new_addr || new_addr == 0 || |
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last_addr == -1) {
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new_addr = -1;
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} |
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} else {
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no_mem_map:
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new_addr = -1;
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} |
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} |
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/* now do the real mapping */
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if (new_addr != r->addr) {
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if (r->addr != -1) { |
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if (r->type & PCI_ADDRESS_SPACE_IO) {
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int class;
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/* NOTE: specific hack for IDE in PC case:
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only one byte must be mapped. */
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class = d->config[0x0a] | (d->config[0x0b] << 8); |
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if (class == 0x0101 && r->size == 4) { |
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isa_unassign_ioport(r->addr + 2, 1); |
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} else {
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isa_unassign_ioport(r->addr, r->size); |
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} |
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} else {
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cpu_register_physical_memory(pci_to_cpu_addr(r->addr), |
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r->size, |
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IO_MEM_UNASSIGNED); |
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} |
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} |
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r->addr = new_addr; |
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if (r->addr != -1) { |
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r->map_func(d, i, r->addr, r->size, r->type); |
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} |
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} |
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} |
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} |
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} |
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uint32_t pci_default_read_config(PCIDevice *d, |
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uint32_t address, int len)
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{ |
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uint32_t val; |
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switch(len) {
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default:
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case 4: |
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if (address <= 0xfc) { |
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val = le32_to_cpu(*(uint32_t *)(d->config + address)); |
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break;
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} |
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/* fall through */
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case 2: |
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if (address <= 0xfe) { |
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val = le16_to_cpu(*(uint16_t *)(d->config + address)); |
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break;
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} |
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/* fall through */
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case 1: |
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val = d->config[address]; |
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break;
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} |
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return val;
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} |
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void pci_default_write_config(PCIDevice *d,
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uint32_t address, uint32_t val, int len)
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{ |
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int can_write, i;
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uint32_t end, addr; |
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if (len == 4 && ((address >= 0x10 && address < 0x10 + 4 * 6) || |
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(address >= 0x30 && address < 0x34))) { |
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PCIIORegion *r; |
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int reg;
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if ( address >= 0x30 ) { |
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reg = PCI_ROM_SLOT; |
280 |
}else{
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reg = (address - 0x10) >> 2; |
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} |
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r = &d->io_regions[reg]; |
284 |
if (r->size == 0) |
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goto default_config;
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/* compute the stored value */
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if (reg == PCI_ROM_SLOT) {
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/* keep ROM enable bit */
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val &= (~(r->size - 1)) | 1; |
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} else {
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val &= ~(r->size - 1);
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val |= r->type; |
293 |
} |
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*(uint32_t *)(d->config + address) = cpu_to_le32(val); |
295 |
pci_update_mappings(d); |
296 |
return;
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} |
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default_config:
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/* not efficient, but simple */
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addr = address; |
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for(i = 0; i < len; i++) { |
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/* default read/write accesses */
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switch(d->config[0x0e]) { |
304 |
case 0x00: |
305 |
case 0x80: |
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switch(addr) {
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case 0x00: |
308 |
case 0x01: |
309 |
case 0x02: |
310 |
case 0x03: |
311 |
case 0x08: |
312 |
case 0x09: |
313 |
case 0x0a: |
314 |
case 0x0b: |
315 |
case 0x0e: |
316 |
case 0x10 ... 0x27: /* base */ |
317 |
case 0x30 ... 0x33: /* rom */ |
318 |
case 0x3d: |
319 |
can_write = 0;
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320 |
break;
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321 |
default:
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322 |
can_write = 1;
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break;
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324 |
} |
325 |
break;
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326 |
default:
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327 |
case 0x01: |
328 |
switch(addr) {
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329 |
case 0x00: |
330 |
case 0x01: |
331 |
case 0x02: |
332 |
case 0x03: |
333 |
case 0x08: |
334 |
case 0x09: |
335 |
case 0x0a: |
336 |
case 0x0b: |
337 |
case 0x0e: |
338 |
case 0x38 ... 0x3b: /* rom */ |
339 |
case 0x3d: |
340 |
can_write = 0;
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341 |
break;
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342 |
default:
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343 |
can_write = 1;
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break;
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345 |
} |
346 |
break;
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347 |
} |
348 |
if (can_write) {
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349 |
d->config[addr] = val; |
350 |
} |
351 |
if (++addr > 0xff) |
352 |
break;
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353 |
val >>= 8;
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354 |
} |
355 |
|
356 |
end = address + len; |
357 |
if (end > PCI_COMMAND && address < (PCI_COMMAND + 2)) { |
358 |
/* if the command register is modified, we must modify the mappings */
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359 |
pci_update_mappings(d); |
360 |
} |
361 |
} |
362 |
|
363 |
void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len) |
364 |
{ |
365 |
PCIBus *s = opaque; |
366 |
PCIDevice *pci_dev; |
367 |
int config_addr, bus_num;
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368 |
|
369 |
#if defined(DEBUG_PCI) && 0 |
370 |
printf("pci_data_write: addr=%08x val=%08x len=%d\n",
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371 |
addr, val, len); |
372 |
#endif
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373 |
bus_num = (addr >> 16) & 0xff; |
374 |
while (s && s->bus_num != bus_num)
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375 |
s = s->next; |
376 |
if (!s)
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377 |
return;
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378 |
pci_dev = s->devices[(addr >> 8) & 0xff]; |
379 |
if (!pci_dev)
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380 |
return;
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381 |
config_addr = addr & 0xff;
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382 |
#if defined(DEBUG_PCI)
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383 |
printf("pci_config_write: %s: addr=%02x val=%08x len=%d\n",
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384 |
pci_dev->name, config_addr, val, len); |
385 |
#endif
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386 |
pci_dev->config_write(pci_dev, config_addr, val, len); |
387 |
} |
388 |
|
389 |
uint32_t pci_data_read(void *opaque, uint32_t addr, int len) |
390 |
{ |
391 |
PCIBus *s = opaque; |
392 |
PCIDevice *pci_dev; |
393 |
int config_addr, bus_num;
|
394 |
uint32_t val; |
395 |
|
396 |
bus_num = (addr >> 16) & 0xff; |
397 |
while (s && s->bus_num != bus_num)
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398 |
s= s->next; |
399 |
if (!s)
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400 |
goto fail;
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401 |
pci_dev = s->devices[(addr >> 8) & 0xff]; |
402 |
if (!pci_dev) {
|
403 |
fail:
|
404 |
switch(len) {
|
405 |
case 1: |
406 |
val = 0xff;
|
407 |
break;
|
408 |
case 2: |
409 |
val = 0xffff;
|
410 |
break;
|
411 |
default:
|
412 |
case 4: |
413 |
val = 0xffffffff;
|
414 |
break;
|
415 |
} |
416 |
goto the_end;
|
417 |
} |
418 |
config_addr = addr & 0xff;
|
419 |
val = pci_dev->config_read(pci_dev, config_addr, len); |
420 |
#if defined(DEBUG_PCI)
|
421 |
printf("pci_config_read: %s: addr=%02x val=%08x len=%d\n",
|
422 |
pci_dev->name, config_addr, val, len); |
423 |
#endif
|
424 |
the_end:
|
425 |
#if defined(DEBUG_PCI) && 0 |
426 |
printf("pci_data_read: addr=%08x val=%08x len=%d\n",
|
427 |
addr, val, len); |
428 |
#endif
|
429 |
return val;
|
430 |
} |
431 |
|
432 |
/***********************************************************/
|
433 |
/* generic PCI irq support */
|
434 |
|
435 |
/* 0 <= irq_num <= 3. level must be 0 or 1 */
|
436 |
void pci_set_irq(PCIDevice *pci_dev, int irq_num, int level) |
437 |
{ |
438 |
PCIBus *bus; |
439 |
int change;
|
440 |
|
441 |
change = level - pci_dev->irq_state[irq_num]; |
442 |
if (!change)
|
443 |
return;
|
444 |
|
445 |
pci_dev->irq_state[irq_num] = level; |
446 |
for (;;) {
|
447 |
bus = pci_dev->bus; |
448 |
irq_num = bus->map_irq(pci_dev, irq_num); |
449 |
if (bus->set_irq)
|
450 |
break;
|
451 |
pci_dev = bus->parent_dev; |
452 |
} |
453 |
bus->irq_count[irq_num] += change; |
454 |
bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
|
455 |
} |
456 |
|
457 |
/***********************************************************/
|
458 |
/* monitor info on PCI */
|
459 |
|
460 |
typedef struct { |
461 |
uint16_t class; |
462 |
const char *desc; |
463 |
} pci_class_desc; |
464 |
|
465 |
static pci_class_desc pci_class_descriptions[] =
|
466 |
{ |
467 |
{ 0x0100, "SCSI controller"}, |
468 |
{ 0x0101, "IDE controller"}, |
469 |
{ 0x0200, "Ethernet controller"}, |
470 |
{ 0x0300, "VGA controller"}, |
471 |
{ 0x0600, "Host bridge"}, |
472 |
{ 0x0601, "ISA bridge"}, |
473 |
{ 0x0604, "PCI bridge"}, |
474 |
{ 0x0c03, "USB controller"}, |
475 |
{ 0, NULL} |
476 |
}; |
477 |
|
478 |
static void pci_info_device(PCIDevice *d) |
479 |
{ |
480 |
int i, class;
|
481 |
PCIIORegion *r; |
482 |
pci_class_desc *desc; |
483 |
|
484 |
term_printf(" Bus %2d, device %3d, function %d:\n",
|
485 |
d->bus->bus_num, d->devfn >> 3, d->devfn & 7); |
486 |
class = le16_to_cpu(*((uint16_t *)(d->config + PCI_CLASS_DEVICE))); |
487 |
term_printf(" ");
|
488 |
desc = pci_class_descriptions; |
489 |
while (desc->desc && class != desc->class)
|
490 |
desc++; |
491 |
if (desc->desc) {
|
492 |
term_printf("%s", desc->desc);
|
493 |
} else {
|
494 |
term_printf("Class %04x", class);
|
495 |
} |
496 |
term_printf(": PCI device %04x:%04x\n",
|
497 |
le16_to_cpu(*((uint16_t *)(d->config + PCI_VENDOR_ID))), |
498 |
le16_to_cpu(*((uint16_t *)(d->config + PCI_DEVICE_ID)))); |
499 |
|
500 |
if (d->config[PCI_INTERRUPT_PIN] != 0) { |
501 |
term_printf(" IRQ %d.\n", d->config[PCI_INTERRUPT_LINE]);
|
502 |
} |
503 |
if (class == 0x0604) { |
504 |
term_printf(" BUS %d.\n", d->config[0x19]); |
505 |
} |
506 |
for(i = 0;i < PCI_NUM_REGIONS; i++) { |
507 |
r = &d->io_regions[i]; |
508 |
if (r->size != 0) { |
509 |
term_printf(" BAR%d: ", i);
|
510 |
if (r->type & PCI_ADDRESS_SPACE_IO) {
|
511 |
term_printf("I/O at 0x%04x [0x%04x].\n",
|
512 |
r->addr, r->addr + r->size - 1);
|
513 |
} else {
|
514 |
term_printf("32 bit memory at 0x%08x [0x%08x].\n",
|
515 |
r->addr, r->addr + r->size - 1);
|
516 |
} |
517 |
} |
518 |
} |
519 |
if (class == 0x0604 && d->config[0x19] != 0) { |
520 |
pci_for_each_device(d->config[0x19], pci_info_device);
|
521 |
} |
522 |
} |
523 |
|
524 |
void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d)) |
525 |
{ |
526 |
PCIBus *bus = first_bus; |
527 |
PCIDevice *d; |
528 |
int devfn;
|
529 |
|
530 |
while (bus && bus->bus_num != bus_num)
|
531 |
bus = bus->next; |
532 |
if (bus) {
|
533 |
for(devfn = 0; devfn < 256; devfn++) { |
534 |
d = bus->devices[devfn]; |
535 |
if (d)
|
536 |
fn(d); |
537 |
} |
538 |
} |
539 |
} |
540 |
|
541 |
void pci_info(void) |
542 |
{ |
543 |
pci_for_each_device(0, pci_info_device);
|
544 |
} |
545 |
|
546 |
/* Initialize a PCI NIC. */
|
547 |
void pci_nic_init(PCIBus *bus, NICInfo *nd, int devfn) |
548 |
{ |
549 |
if (strcmp(nd->model, "ne2k_pci") == 0) { |
550 |
pci_ne2000_init(bus, nd, devfn); |
551 |
} else if (strcmp(nd->model, "rtl8139") == 0) { |
552 |
pci_rtl8139_init(bus, nd, devfn); |
553 |
} else if (strcmp(nd->model, "pcnet") == 0) { |
554 |
pci_pcnet_init(bus, nd, devfn); |
555 |
} else {
|
556 |
fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd->model);
|
557 |
exit (1);
|
558 |
} |
559 |
} |
560 |
|
561 |
typedef struct { |
562 |
PCIDevice dev; |
563 |
PCIBus *bus; |
564 |
} PCIBridge; |
565 |
|
566 |
void pci_bridge_write_config(PCIDevice *d,
|
567 |
uint32_t address, uint32_t val, int len)
|
568 |
{ |
569 |
PCIBridge *s = (PCIBridge *)d; |
570 |
|
571 |
if (address == 0x19 || (address == 0x18 && len > 1)) { |
572 |
if (address == 0x19) |
573 |
s->bus->bus_num = val & 0xff;
|
574 |
else
|
575 |
s->bus->bus_num = (val >> 8) & 0xff; |
576 |
#if defined(DEBUG_PCI)
|
577 |
printf ("pci-bridge: %s: Assigned bus %d\n", d->name, s->bus->bus_num);
|
578 |
#endif
|
579 |
} |
580 |
pci_default_write_config(d, address, val, len); |
581 |
} |
582 |
|
583 |
PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint32_t id,
|
584 |
pci_map_irq_fn map_irq, const char *name) |
585 |
{ |
586 |
PCIBridge *s; |
587 |
s = (PCIBridge *)pci_register_device(bus, name, sizeof(PCIBridge),
|
588 |
devfn, NULL, pci_bridge_write_config);
|
589 |
s->dev.config[0x00] = id >> 16; |
590 |
s->dev.config[0x01] = id >> 24; |
591 |
s->dev.config[0x02] = id; // device_id |
592 |
s->dev.config[0x03] = id >> 8; |
593 |
s->dev.config[0x04] = 0x06; // command = bus master, pci mem |
594 |
s->dev.config[0x05] = 0x00; |
595 |
s->dev.config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error |
596 |
s->dev.config[0x07] = 0x00; // status = fast devsel |
597 |
s->dev.config[0x08] = 0x00; // revision |
598 |
s->dev.config[0x09] = 0x00; // programming i/f |
599 |
s->dev.config[0x0A] = 0x04; // class_sub = PCI to PCI bridge |
600 |
s->dev.config[0x0B] = 0x06; // class_base = PCI_bridge |
601 |
s->dev.config[0x0D] = 0x10; // latency_timer |
602 |
s->dev.config[0x0E] = 0x81; // header_type |
603 |
s->dev.config[0x1E] = 0xa0; // secondary status |
604 |
|
605 |
s->bus = pci_register_secondary_bus(&s->dev, map_irq); |
606 |
return s->bus;
|
607 |
} |