diff options
Diffstat (limited to 'hw/pcie_host.c')
| -rw-r--r-- | hw/pcie_host.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/hw/pcie_host.c b/hw/pcie_host.c deleted file mode 100644 index 28bbe72b37..0000000000 --- a/hw/pcie_host.c +++ /dev/null @@ -1,144 +0,0 @@ -/* - * pcie_host.c - * utility functions for pci express host bridge. - * - * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp> - * VA Linux Systems Japan K.K. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - - * You should have received a copy of the GNU General Public License along - * with this program; if not, see <http://www.gnu.org/licenses/>. - */ - -#include "hw.h" -#include "pci.h" -#include "pcie_host.h" -#include "exec-memory.h" - -/* - * PCI express mmcfig address - * bit 20 - 28: bus number - * bit 15 - 19: device number - * bit 12 - 14: function number - * bit 0 - 11: offset in configuration space of a given device - */ -#define PCIE_MMCFG_SIZE_MAX (1ULL << 28) -#define PCIE_MMCFG_SIZE_MIN (1ULL << 20) -#define PCIE_MMCFG_BUS_BIT 20 -#define PCIE_MMCFG_BUS_MASK 0x1ff -#define PCIE_MMCFG_DEVFN_BIT 12 -#define PCIE_MMCFG_DEVFN_MASK 0xff -#define PCIE_MMCFG_CONFOFFSET_MASK 0xfff -#define PCIE_MMCFG_BUS(addr) (((addr) >> PCIE_MMCFG_BUS_BIT) & \ - PCIE_MMCFG_BUS_MASK) -#define PCIE_MMCFG_DEVFN(addr) (((addr) >> PCIE_MMCFG_DEVFN_BIT) & \ - PCIE_MMCFG_DEVFN_MASK) -#define PCIE_MMCFG_CONFOFFSET(addr) ((addr) & PCIE_MMCFG_CONFOFFSET_MASK) - - -/* a helper function to get a PCIDevice for a given mmconfig address */ -static inline PCIDevice *pcie_dev_find_by_mmcfg_addr(PCIBus *s, - uint32_t mmcfg_addr) -{ - return pci_find_device(s, PCIE_MMCFG_BUS(mmcfg_addr), - PCIE_MMCFG_DEVFN(mmcfg_addr)); -} - -static void pcie_mmcfg_data_write(void *opaque, target_phys_addr_t mmcfg_addr, - uint64_t val, unsigned len) -{ - PCIExpressHost *e = opaque; - PCIBus *s = e->pci.bus; - PCIDevice *pci_dev = pcie_dev_find_by_mmcfg_addr(s, mmcfg_addr); - uint32_t addr; - uint32_t limit; - - if (!pci_dev) { - return; - } - addr = PCIE_MMCFG_CONFOFFSET(mmcfg_addr); - limit = pci_config_size(pci_dev); - if (limit <= addr) { - /* conventional pci device can be behind pcie-to-pci bridge. - 256 <= addr < 4K has no effects. */ - return; - } - pci_host_config_write_common(pci_dev, addr, limit, val, len); -} - -static uint64_t pcie_mmcfg_data_read(void *opaque, - target_phys_addr_t mmcfg_addr, - unsigned len) -{ - PCIExpressHost *e = opaque; - PCIBus *s = e->pci.bus; - PCIDevice *pci_dev = pcie_dev_find_by_mmcfg_addr(s, mmcfg_addr); - uint32_t addr; - uint32_t limit; - - if (!pci_dev) { - return ~0x0; - } - addr = PCIE_MMCFG_CONFOFFSET(mmcfg_addr); - limit = pci_config_size(pci_dev); - if (limit <= addr) { - /* conventional pci device can be behind pcie-to-pci bridge. - 256 <= addr < 4K has no effects. */ - return ~0x0; - } - return pci_host_config_read_common(pci_dev, addr, limit, len); -} - -static const MemoryRegionOps pcie_mmcfg_ops = { - .read = pcie_mmcfg_data_read, - .write = pcie_mmcfg_data_write, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -/* pcie_host::base_addr == PCIE_BASE_ADDR_UNMAPPED when it isn't mapped. */ -#define PCIE_BASE_ADDR_UNMAPPED ((target_phys_addr_t)-1ULL) - -int pcie_host_init(PCIExpressHost *e, uint32_t size) -{ - assert(!(size & (size - 1))); /* power of 2 */ - assert(size >= PCIE_MMCFG_SIZE_MIN); - assert(size <= PCIE_MMCFG_SIZE_MAX); - e->base_addr = PCIE_BASE_ADDR_UNMAPPED; - e->size = size; - memory_region_init_io(&e->mmio, &pcie_mmcfg_ops, e, "pcie-mmcfg", e->size); - - return 0; -} - -void pcie_host_mmcfg_unmap(PCIExpressHost *e) -{ - if (e->base_addr != PCIE_BASE_ADDR_UNMAPPED) { - memory_region_del_subregion(get_system_memory(), &e->mmio); - e->base_addr = PCIE_BASE_ADDR_UNMAPPED; - } -} - -void pcie_host_mmcfg_map(PCIExpressHost *e, target_phys_addr_t addr) -{ - e->base_addr = addr; - memory_region_add_subregion(get_system_memory(), e->base_addr, &e->mmio); -} - -void pcie_host_mmcfg_update(PCIExpressHost *e, - int enable, - target_phys_addr_t addr) -{ - pcie_host_mmcfg_unmap(e); - if (enable) { - pcie_host_mmcfg_map(e, addr); - } -} |