pci_cfgacc_x86.c revision 137632774395dba0eb9b77257da1d8732bd5413d
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * CDDL HEADER START
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * The contents of this file are subject to the terms of the
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * Common Development and Distribution License (the "License").
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * You may not use this file except in compliance with the License.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * or http://www.opensolaris.org/os/licensing.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * See the License for the specific language governing permissions
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * and limitations under the License.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * When distributing Covered Code, include this CDDL HEADER in each
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * CDDL HEADER END
137632774395dba0eb9b77257da1d8732bd5413dGuoli Shu * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * Use is subject to license terms.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu#define PCIE_CFG_SPACE_SIZE (PCI_CONF_HDR_SIZE << 4)
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu#define PCI_BDF_BUS(bdf) ((((uint16_t)bdf) & 0xff00) >> 8)
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu#define PCI_BDF_DEV(bdf) ((((uint16_t)bdf) & 0xf8) >> 3)
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu#define PCI_BDF_FUNC(bdf) (((uint16_t)bdf) & 0x7)
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu/* patchable variables */
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fuvolatile boolean_t pci_cfgacc_force_io = B_FALSE;
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fuextern uintptr_t alloc_vaddr(size_t, paddr_t);
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fuboolean_t pci_cfgacc_find_workaround(uint16_t);
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * IS_P2ALIGNED() is used to make sure offset is 'size'-aligned, so
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * it's guaranteed that the access will not cross 4k page boundary.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * Thus only 1 page is allocated for all config space access, and the
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * virtual address of that page is cached in pci_cfgacc_virt_base.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu phys_addr = pfn_to_pa(xen_assign_pfn(mmu_btop(phys_addr))) |
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * pci_cfgacc_virt_base may hold address left from early
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * boot, which points to low mem. Realloc virtual address
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * in kernel space since it's already late in boot now.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * Note: no need to unmap first, clear_boot_mappings() will
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * do that for us.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu if (pci_cfgacc_virt_base < (caddr_t)kernelbase) {
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu if ((pci_cfgacc_virt_base = vmem_alloc(heap_arena,
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu hat_devload(kas.a_hat, pci_cfgacc_virt_base,
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu MMU_PAGESIZE, pfn, PROT_READ | PROT_WRITE |
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu paddr_t pa_base = P2ALIGN(phys_addr, MMU_PAGESIZE);
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu alloc_vaddr(MMU_PAGESIZE, MMU_PAGESIZE)) == NULL)
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu kbm_map((uintptr_t)pci_cfgacc_virt_base, pa_base, 0, 0);
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu return (pci_cfgacc_virt_base + (phys_addr & MMU_PAGEOFFSET));
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu hat_unload(kas.a_hat, pci_cfgacc_virt_base, MMU_PAGESIZE,
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu VAL8(req) = (*pci_getb_func)(bus, dev, func,
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu VAL16(req) = (*pci_getw_func)(bus, dev, func,
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu VAL32(req) = (*pci_getl_func)(bus, dev, func,
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu if ((vaddr = pci_cfgacc_map(paddr)) == NULL) {
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu return (IS_P2ALIGNED(req->offset, req->size) &&
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu if (pci_cfgacc_force_io || (mcfg_mem_base == NULL) ||
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu (bus < mcfg_bus_start) || (bus > mcfg_bus_end))
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu /* check if workaround is needed */
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fucfgacc_bus_range_t *pci_cfgacc_bus_head = NULL;
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * This function is only supposed to be called in device tree setup time,
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * thus no lock is needed.
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fupci_cfgacc_add_workaround(uint16_t bdf, uchar_t secbus, uchar_t subbus)
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu entry = kmem_zalloc(sizeof (cfgacc_bus_range_t), KM_SLEEP);
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu for (entry = pci_cfgacc_bus_head; entry != NULL;
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu /* found a device which is known to be broken */
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu if ((bus != 0) && (bus >= entry->secbus) &&
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * found a device whose parent/grandparent is
c0da627439dfb642fb41ab7d78406fc69d2c64b2Zhi-Jun Robin Fu * known to be broken.