/* * libqos PCI bindings * * Copyright IBM, Corp. 2012-2013 * * Authors: * Anthony Liguori * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "libqos/pci.h" #include "hw/pci/pci_regs.h" #include "qemu/host-utils.h" void qpci_device_foreach(QPCIBus *bus, int vendor_id, int device_id, void (*func)(QPCIDevice *dev, int devfn, void *data), void *data) { int slot; for (slot = 0; slot < 32; slot++) { int fn; for (fn = 0; fn < 8; fn++) { QPCIDevice *dev; dev = qpci_device_find(bus, QPCI_DEVFN(slot, fn)); if (!dev) { continue; } if (vendor_id != -1 && qpci_config_readw(dev, PCI_VENDOR_ID) != vendor_id) { g_free(dev); continue; } if (device_id != -1 && qpci_config_readw(dev, PCI_DEVICE_ID) != device_id) { g_free(dev); continue; } func(dev, QPCI_DEVFN(slot, fn), data); } } } QPCIDevice *qpci_device_find(QPCIBus *bus, int devfn) { QPCIDevice *dev; dev = g_malloc0(sizeof(*dev)); dev->bus = bus; dev->devfn = devfn; if (qpci_config_readw(dev, PCI_VENDOR_ID) == 0xFFFF) { g_free(dev); return NULL; } return dev; } void qpci_device_enable(QPCIDevice *dev) { uint16_t cmd; /* FIXME -- does this need to be a bus callout? */ cmd = qpci_config_readw(dev, PCI_COMMAND); cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER; qpci_config_writew(dev, PCI_COMMAND, cmd); /* Verify the bits are now set. */ cmd = qpci_config_readw(dev, PCI_COMMAND); g_assert_cmphex(cmd & PCI_COMMAND_IO, ==, PCI_COMMAND_IO); g_assert_cmphex(cmd & PCI_COMMAND_MEMORY, ==, PCI_COMMAND_MEMORY); g_assert_cmphex(cmd & PCI_COMMAND_MASTER, ==, PCI_COMMAND_MASTER); } uint8_t qpci_find_capability(QPCIDevice *dev, uint8_t id) { uint8_t cap; uint8_t addr = qpci_config_readb(dev, PCI_CAPABILITY_LIST); do { cap = qpci_config_readb(dev, addr); if (cap != id) { addr = qpci_config_readb(dev, addr + PCI_CAP_LIST_NEXT); } } while (cap != id && addr != 0); return addr; } void qpci_msix_enable(QPCIDevice *dev) { uint8_t addr; uint16_t val; uint32_t table; uint8_t bir_table; uint8_t bir_pba; void *offset; addr = qpci_find_capability(dev, PCI_CAP_ID_MSIX); g_assert_cmphex(addr, !=, 0); val = qpci_config_readw(dev, addr + PCI_MSIX_FLAGS); qpci_config_writew(dev, addr + PCI_MSIX_FLAGS, val | PCI_MSIX_FLAGS_ENABLE); table = qpci_config_readl(dev, addr + PCI_MSIX_TABLE); bir_table = table & PCI_MSIX_FLAGS_BIRMASK; offset = qpci_iomap(dev, bir_table, NULL); dev->msix_table = offset + (table & ~PCI_MSIX_FLAGS_BIRMASK); table = qpci_config_readl(dev, addr + PCI_MSIX_PBA); bir_pba = table & PCI_MSIX_FLAGS_BIRMASK; if (bir_pba != bir_table) { offset = qpci_iomap(dev, bir_pba, NULL); } dev->msix_pba = offset + (table & ~PCI_MSIX_FLAGS_BIRMASK); g_assert(dev->msix_table != NULL); g_assert(dev->msix_pba != NULL); dev->msix_enabled = true; } void qpci_msix_disable(QPCIDevice *dev) { uint8_t addr; uint16_t val; g_assert(dev->msix_enabled); addr = qpci_find_capability(dev, PCI_CAP_ID_MSIX); g_assert_cmphex(addr, !=, 0); val = qpci_config_readw(dev, addr + PCI_MSIX_FLAGS); qpci_config_writew(dev, addr + PCI_MSIX_FLAGS, val & ~PCI_MSIX_FLAGS_ENABLE); qpci_iounmap(dev, dev->msix_table); qpci_iounmap(dev, dev->msix_pba); dev->msix_enabled = 0; dev->msix_table = NULL; dev->msix_pba = NULL; } bool qpci_msix_pending(QPCIDevice *dev, uint16_t entry) { uint32_t pba_entry; uint8_t bit_n = entry % 32; void *addr = dev->msix_pba + (entry / 32) * PCI_MSIX_ENTRY_SIZE / 4; g_assert(dev->msix_enabled); pba_entry = qpci_io_readl(dev, addr); qpci_io_writel(dev, addr, pba_entry & ~(1 << bit_n)); return (pba_entry & (1 << bit_n)) != 0; } bool qpci_msix_masked(QPCIDevice *dev, uint16_t entry) { uint8_t addr; uint16_t val; void *vector_addr = dev->msix_table + (entry * PCI_MSIX_ENTRY_SIZE); g_assert(dev->msix_enabled); addr = qpci_find_capability(dev, PCI_CAP_ID_MSIX); g_assert_cmphex(addr, !=, 0); val = qpci_config_readw(dev, addr + PCI_MSIX_FLAGS); if (val & PCI_MSIX_FLAGS_MASKALL) { return true; } else { return (qpci_io_readl(dev, vector_addr + PCI_MSIX_ENTRY_VECTOR_CTRL) & PCI_MSIX_ENTRY_CTRL_MASKBIT) != 0; } } uint16_t qpci_msix_table_size(QPCIDevice *dev) { uint8_t addr; uint16_t control; addr = qpci_find_capability(dev, PCI_CAP_ID_MSIX); g_assert_cmphex(addr, !=, 0); control = qpci_config_readw(dev, addr + PCI_MSIX_FLAGS); return (control & PCI_MSIX_FLAGS_QSIZE) + 1; } uint8_t qpci_config_readb(QPCIDevice *dev, uint8_t offset) { return dev->bus->config_readb(dev->bus, dev->devfn, offset); } uint16_t qpci_config_readw(QPCIDevice *dev, uint8_t offset) { return dev->bus->config_readw(dev->bus, dev->devfn, offset); } uint32_t qpci_config_readl(QPCIDevice *dev, uint8_t offset) { return dev->bus->config_readl(dev->bus, dev->devfn, offset); } void qpci_config_writeb(QPCIDevice *dev, uint8_t offset, uint8_t value) { dev->bus->config_writeb(dev->bus, dev->devfn, offset, value); } void qpci_config_writew(QPCIDevice *dev, uint8_t offset, uint16_t value) { dev->bus->config_writew(dev->bus, dev->devfn, offset, value); } void qpci_config_writel(QPCIDevice *dev, uint8_t offset, uint32_t value) { dev->bus->config_writel(dev->bus, dev->devfn, offset, value); } uint8_t qpci_io_readb(QPCIDevice *dev, void *data) { uintptr_t addr = (uintptr_t)data; if (addr < QPCI_PIO_LIMIT) { return dev->bus->pio_readb(dev->bus, addr); } else { return dev->bus->mmio_readb(dev->bus, addr); } } uint16_t qpci_io_readw(QPCIDevice *dev, void *data) { uintptr_t addr = (uintptr_t)data; if (addr < QPCI_PIO_LIMIT) { return dev->bus->pio_readw(dev->bus, addr); } else { return dev->bus->mmio_readw(dev->bus, addr); } } uint32_t qpci_io_readl(QPCIDevice *dev, void *data) { uintptr_t addr = (uintptr_t)data; if (addr < QPCI_PIO_LIMIT) { return dev->bus->pio_readl(dev->bus, addr); } else { return dev->bus->mmio_readl(dev->bus, addr); } } void qpci_io_writeb(QPCIDevice *dev, void *data, uint8_t value) { uintptr_t addr = (uintptr_t)data; if (addr < QPCI_PIO_LIMIT) { dev->bus->pio_writeb(dev->bus, addr, value); } else { dev->bus->mmio_writeb(dev->bus, addr, value); } } void qpci_io_writew(QPCIDevice *dev, void *data, uint16_t value) { uintptr_t addr = (uintptr_t)data; if (addr < QPCI_PIO_LIMIT) { dev->bus->pio_writew(dev->bus, addr, value); } else { dev->bus->mmio_writew(dev->bus, addr, value); } } void qpci_io_writel(QPCIDevice *dev, void *data, uint32_t value) { uintptr_t addr = (uintptr_t)data; if (addr < QPCI_PIO_LIMIT) { dev->bus->pio_writel(dev->bus, addr, value); } else { dev->bus->mmio_writel(dev->bus, addr, value); } } void *qpci_iomap(QPCIDevice *dev, int barno, uint64_t *sizeptr) { QPCIBus *bus = dev->bus; static const int bar_reg_map[] = { PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_1, PCI_BASE_ADDRESS_2, PCI_BASE_ADDRESS_3, PCI_BASE_ADDRESS_4, PCI_BASE_ADDRESS_5, }; int bar_reg; uint32_t addr, size; uint32_t io_type; uint64_t loc; g_assert(barno >= 0 && barno <= 5); bar_reg = bar_reg_map[barno]; qpci_config_writel(dev, bar_reg, 0xFFFFFFFF); addr = qpci_config_readl(dev, bar_reg); io_type = addr & PCI_BASE_ADDRESS_SPACE; if (io_type == PCI_BASE_ADDRESS_SPACE_IO) { addr &= PCI_BASE_ADDRESS_IO_MASK; } else { addr &= PCI_BASE_ADDRESS_MEM_MASK; } g_assert(addr); /* Must have *some* size bits */ size = 1U << ctz32(addr); if (sizeptr) { *sizeptr = size; } if (io_type == PCI_BASE_ADDRESS_SPACE_IO) { loc = QEMU_ALIGN_UP(bus->pio_alloc_ptr, size); g_assert(loc >= bus->pio_alloc_ptr); g_assert(loc + size <= QPCI_PIO_LIMIT); /* Keep PIO below 64kiB */ bus->pio_alloc_ptr = loc + size; qpci_config_writel(dev, bar_reg, loc | PCI_BASE_ADDRESS_SPACE_IO); } else { loc = QEMU_ALIGN_UP(bus->mmio_alloc_ptr, size); /* Check for space */ g_assert(loc >= bus->mmio_alloc_ptr); g_assert(loc + size <= bus->mmio_limit); bus->mmio_alloc_ptr = loc + size; qpci_config_writel(dev, bar_reg, loc); } return (void *)(uintptr_t)loc; } void qpci_iounmap(QPCIDevice *dev, void *data) { /* FIXME */ } void *qpci_legacy_iomap(QPCIDevice *dev, uint16_t addr) { return (void *)(uintptr_t)addr; } void qpci_plug_device_test(const char *driver, const char *id, uint8_t slot, const char *opts) { QDict *response; char *cmd; cmd = g_strdup_printf("{'execute': 'device_add'," " 'arguments': {" " 'driver': '%s'," " 'addr': '%d'," " %s%s" " 'id': '%s'" "}}", driver, slot, opts ? opts : "", opts ? "," : "", id); response = qmp(cmd); g_free(cmd); g_assert(response); g_assert(!qdict_haskey(response, "error")); QDECREF(response); }