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-rw-r--r--xorg-server/hw/xfree86/os-support/bus/Makefile.am51
-rw-r--r--xorg-server/hw/xfree86/os-support/bus/Pci.c11
-rw-r--r--xorg-server/hw/xfree86/os-support/bus/Pci.h5
-rw-r--r--xorg-server/hw/xfree86/os-support/bus/linuxPci.c904
4 files changed, 475 insertions, 496 deletions
diff --git a/xorg-server/hw/xfree86/os-support/bus/Makefile.am b/xorg-server/hw/xfree86/os-support/bus/Makefile.am
index 92a519bcc..41d8875fb 100644
--- a/xorg-server/hw/xfree86/os-support/bus/Makefile.am
+++ b/xorg-server/hw/xfree86/os-support/bus/Makefile.am
@@ -1,26 +1,25 @@
-noinst_LTLIBRARIES = libbus.la
-sdk_HEADERS = xf86Pci.h
-
-PCI_SOURCES =
-
-if XORG_BUS_LINUXPCI
-PCI_SOURCES += linuxPci.c
-endif
-
-if XORG_BUS_BSDPCI
-PCI_SOURCES += bsd_pci.c
-endif
-
-if XORG_BUS_SPARC
-PLATFORM_SOURCES = Sbus.c
-sdk_HEADERS += xf86Sbus.h
-endif
-
-libbus_la_SOURCES = Pci.c Pci.h $(PCI_SOURCES) $(PLATFORM_PCI_SOURCES) \
- $(PLATFORM_SOURCES)
-
-INCLUDES = $(XORG_INCS)
-
-AM_CFLAGS = $(XORG_CFLAGS) $(DIX_CFLAGS)
-
-EXTRA_DIST = $(sdk_HEADERS)
+noinst_LTLIBRARIES = libbus.la
+sdk_HEADERS = xf86Pci.h
+
+PCI_SOURCES = Pci.c Pci.h
+
+if XORG_BUS_LINUXPCI
+PCI_SOURCES += linuxPci.c
+endif
+
+if XORG_BUS_BSDPCI
+PCI_SOURCES += bsd_pci.c
+endif
+
+if XORG_BUS_SPARC
+PLATFORM_SOURCES = Sbus.c
+sdk_HEADERS += xf86Sbus.h
+endif
+
+libbus_la_SOURCES = $(PCI_SOURCES) $(PLATFORM_SOURCES)
+
+INCLUDES = $(XORG_INCS)
+
+AM_CFLAGS = $(XORG_CFLAGS) $(DIX_CFLAGS)
+
+EXTRA_DIST = $(sdk_HEADERS)
diff --git a/xorg-server/hw/xfree86/os-support/bus/Pci.c b/xorg-server/hw/xfree86/os-support/bus/Pci.c
index 7151cc885..8da149d16 100644
--- a/xorg-server/hw/xfree86/os-support/bus/Pci.c
+++ b/xorg-server/hw/xfree86/os-support/bus/Pci.c
@@ -124,19 +124,8 @@
#include <xorg-config.h>
#endif
-#include <errno.h>
-#include <signal.h>
-#include "compiler.h"
-#include "xf86.h"
-#include "xf86Priv.h"
-#define XF86_OS_PRIVS
-#include "xf86_OSproc.h"
#include "Pci.h"
-#include <pciaccess.h>
-
-/* Global data */
-
PCITAG
pciTag(int busnum, int devnum, int funcnum)
{
diff --git a/xorg-server/hw/xfree86/os-support/bus/Pci.h b/xorg-server/hw/xfree86/os-support/bus/Pci.h
index 618dd3783..fb0ad41f6 100644
--- a/xorg-server/hw/xfree86/os-support/bus/Pci.h
+++ b/xorg-server/hw/xfree86/os-support/bus/Pci.h
@@ -133,11 +133,6 @@
#define PCI_MAKE_BUS(d,b) ((((d) & (PCI_DOM_MASK)) << 8) | ((b) & 0xffu))
-#define PCI_DOM_FROM_TAG(tag) (((tag) >> 24) & (PCI_DOM_MASK))
-#define PCI_BUS_FROM_TAG(tag) (((tag) >> 16) & (PCI_DOMBUS_MASK))
-#define PCI_DEV_FROM_TAG(tag) (((tag) & 0x0000f800u) >> 11)
-#define PCI_FUNC_FROM_TAG(tag) (((tag) & 0x00000700u) >> 8)
-
#define PCI_DOM_FROM_BUS(bus) (((bus) >> 8) & (PCI_DOM_MASK))
#define PCI_BUS_NO_DOMAIN(bus) ((bus) & 0xffu)
#define PCI_TAG_NO_DOMAIN(tag) ((tag) & 0x00ffff00u)
diff --git a/xorg-server/hw/xfree86/os-support/bus/linuxPci.c b/xorg-server/hw/xfree86/os-support/bus/linuxPci.c
index 289315ebc..77f724bf1 100644
--- a/xorg-server/hw/xfree86/os-support/bus/linuxPci.c
+++ b/xorg-server/hw/xfree86/os-support/bus/linuxPci.c
@@ -1,454 +1,450 @@
-/*
- * Copyright 1998 by Concurrent Computer Corporation
- *
- * Permission to use, copy, modify, distribute, and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and that
- * both that copyright notice and this permission notice appear in
- * supporting documentation, and that the name of Concurrent Computer
- * Corporation not be used in advertising or publicity pertaining to
- * distribution of the software without specific, written prior
- * permission. Concurrent Computer Corporation makes no representations
- * about the suitability of this software for any purpose. It is
- * provided "as is" without express or implied warranty.
- *
- * CONCURRENT COMPUTER CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD
- * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS, IN NO EVENT SHALL CONCURRENT COMPUTER CORPORATION BE
- * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
- * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- *
- * Copyright 1998 by Metro Link Incorporated
- *
- * Permission to use, copy, modify, distribute, and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and that
- * both that copyright notice and this permission notice appear in
- * supporting documentation, and that the name of Metro Link
- * Incorporated not be used in advertising or publicity pertaining to
- * distribution of the software without specific, written prior
- * permission. Metro Link Incorporated makes no representations
- * about the suitability of this software for any purpose. It is
- * provided "as is" without express or implied warranty.
- *
- * METRO LINK INCORPORATED DISCLAIMS ALL WARRANTIES WITH REGARD
- * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS, IN NO EVENT SHALL METRO LINK INCORPORATED BE
- * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
- * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- */
-
-#ifdef HAVE_XORG_CONFIG_H
-#include <xorg-config.h>
-#endif
-
-#include <stdio.h>
-#include "compiler.h"
-#include "xf86.h"
-#include "xf86Priv.h"
-#include "xf86_OSlib.h"
-#include "Pci.h"
-#include <dirent.h>
-
-static const struct pci_id_match match_host_bridge = {
- PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY,
- (PCI_CLASS_BRIDGE << 16) | (PCI_SUBCLASS_BRIDGE_HOST << 8),
- 0x0000ffff00, 0
-};
-
-#define MAX_DOMAINS 257
-static pointer DomainMmappedIO[MAX_DOMAINS];
-
-void
-linuxPciInit(void)
-{
- memset(DomainMmappedIO, 0, sizeof(DomainMmappedIO));
-}
-
-/**
- * \bug
- * The generation of the procfs file name for the domain != 0 case may not be
- * correct.
- */
-static int
-linuxPciOpenFile(struct pci_device *dev, Bool write)
-{
- static struct pci_device *last_dev = NULL;
- static int fd = -1,is_write = 0;
- char file[64];
- struct stat ignored;
- static int is26 = -1;
-
- if (dev == NULL) {
- return -1;
- }
-
- if (is26 == -1) {
- is26 = (stat("/sys/bus/pci", &ignored) < 0) ? 0 : 1;
- }
-
- if (fd == -1 || (write && (!is_write)) || (last_dev != dev)) {
- if (fd != -1) {
- close(fd);
- fd = -1;
- }
-
- if (is26) {
- sprintf(file,"/sys/bus/pci/devices/%04u:%02x:%02x.%01x/config",
- dev->domain, dev->bus, dev->dev, dev->func);
- } else {
- if (dev->domain == 0) {
- sprintf(file,"/proc/bus/pci/%02x", dev->bus);
- if (stat(file, &ignored) < 0) {
- sprintf(file, "/proc/bus/pci/0000:%02x/%02x.%1x",
- dev->bus, dev->dev, dev->func);
- } else {
- sprintf(file, "/proc/bus/pci/%02x/%02x.%1x",
- dev->bus, dev->dev, dev->func);
- }
- } else {
- sprintf(file,"/proc/bus/pci/%02x%02x", dev->domain, dev->bus);
- if (stat(file, &ignored) < 0) {
- sprintf(file, "/proc/bus/pci/%04x:%04x/%02x.%1x",
- dev->domain, dev->bus, dev->dev, dev->func);
- } else {
- sprintf(file, "/proc/bus/pci/%02x%02x/%02x.%1x",
- dev->domain, dev->bus, dev->dev, dev->func);
- }
- }
- }
-
- if (write) {
- fd = open(file,O_RDWR);
- if (fd != -1) is_write = TRUE;
- } else {
- switch (is_write) {
- case TRUE:
- fd = open(file,O_RDWR);
- if (fd > -1)
- break;
- default:
- fd = open(file,O_RDONLY);
- is_write = FALSE;
- }
- }
-
- last_dev = dev;
- }
-
- return fd;
-}
-
-/*
- * Compiling the following simply requires the presence of <linux/pci.c>.
- * Actually running this is another matter altogether...
- *
- * This scheme requires that the kernel allow mmap()'ing of a host bridge's I/O
- * and memory spaces through its /proc/bus/pci/BUS/DFN entry. Which one is
- * determined by a prior ioctl().
- *
- * For the sparc64 port, this means 2.4.12 or later. For ppc, this
- * functionality is almost, but not quite there yet. Alpha and other kernel
- * ports to multi-domain architectures still need to implement this.
- *
- * This scheme is also predicated on the use of an IOADDRESS compatible type to
- * designate I/O addresses. Although IOADDRESS is defined as an unsigned
- * integral type, it is actually the virtual address of, i.e. a pointer to, the
- * I/O port to access. And so, the inX/outX macros in "compiler.h" need to be
- * #define'd appropriately (as is done on SPARC's).
- *
- * Another requirement to port this scheme to another multi-domain architecture
- * is to add the appropriate entries in the pciControllerSizes array below.
- *
- * TO DO: Address the deleterious reaction some host bridges have to master
- * aborts. This is already done for secondary PCI buses, but not yet
- * for accesses to primary buses (except for the SPARC port, where
- * master aborts are avoided during PCI scans).
- */
-
-#include <linux/pci.h>
-
-#ifndef PCIIOC_BASE /* Ioctls for /proc/bus/pci/X/Y nodes. */
-#define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
-
-/* Get controller for PCI device. */
-#define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00)
-/* Set mmap state to I/O space. */
-#define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01)
-/* Set mmap state to MEM space. */
-#define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02)
-/* Enable/disable write-combining. */
-#define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03)
-
-#endif
-
-/* This probably shouldn't be Linux-specific */
-static struct pci_device *
-get_parent_bridge(struct pci_device *dev)
-{
- struct pci_id_match bridge_match = {
- PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY,
- (PCI_CLASS_BRIDGE << 16) | (PCI_SUBCLASS_BRIDGE_PCI << 8),
- 0
- };
- struct pci_device *bridge;
- struct pci_device_iterator *iter;
-
- if (dev == NULL) {
- return NULL;
- }
-
- iter = pci_id_match_iterator_create(& bridge_match);
- if (iter == NULL) {
- return NULL;
- }
-
- while ((bridge = pci_device_next(iter)) != NULL) {
- if (bridge->domain == dev->domain) {
- const struct pci_bridge_info *info =
- pci_device_get_bridge_info(bridge);
-
- if (info != NULL) {
- if (info->secondary_bus == dev->bus) {
- break;
- }
- }
- }
- }
-
- pci_iterator_destroy(iter);
-
- return bridge;
-}
-
-/*
- * This is ugly, but until I can extract this information from the kernel,
- * it'll have to do. The default I/O space size is 64K, and 4G for memory.
- * Anything else needs to go in this table. (PowerPC folk take note.)
- *
- * Note that Linux/SPARC userland is 32-bit, so 4G overflows to zero here.
- *
- * Please keep this table in ascending vendor/device order.
- */
-static const struct pciSizes {
- unsigned short vendor, device;
- unsigned long io_size, mem_size;
-} pciControllerSizes[] = {
- {
- PCI_VENDOR_SUN, PCI_CHIP_PSYCHO,
- 1U << 16, 1U << 31
- },
- {
- PCI_VENDOR_SUN, PCI_CHIP_SCHIZO,
- 1U << 24, 1U << 31 /* ??? */
- },
- {
- PCI_VENDOR_SUN, PCI_CHIP_SABRE,
- 1U << 24, (unsigned long)(1ULL << 32)
- },
- {
- PCI_VENDOR_SUN, PCI_CHIP_HUMMINGBIRD,
- 1U << 24, (unsigned long)(1ULL << 32)
- }
-};
-#define NUM_SIZES (sizeof(pciControllerSizes) / sizeof(pciControllerSizes[0]))
-
-static const struct pciSizes *
-linuxGetSizesStruct(const struct pci_device *dev)
-{
- static const struct pciSizes default_size = {
- 0, 0, 1U << 16, (unsigned long)(1ULL << 32)
- };
- int i;
-
- /* Look up vendor/device */
- if (dev != NULL) {
- for (i = 0; i < NUM_SIZES; i++) {
- if ((dev->vendor_id == pciControllerSizes[i].vendor)
- && (dev->device_id == pciControllerSizes[i].device)) {
- return & pciControllerSizes[i];
- }
- }
- }
-
- /* Default to 64KB I/O and 4GB memory. */
- return & default_size;
-}
-
-static __inline__ unsigned long
-linuxGetIOSize(const struct pci_device *dev)
-{
- const struct pciSizes * const sizes = linuxGetSizesStruct(dev);
- return sizes->io_size;
-}
-
-static pointer
-linuxMapPci(int ScreenNum, int Flags, struct pci_device *dev,
- ADDRESS Base, unsigned long Size, int mmap_ioctl)
-{
- /* Align to page boundary */
- const ADDRESS realBase = Base & ~(getpagesize() - 1);
- const ADDRESS Offset = Base - realBase;
-
- do {
- unsigned char *result;
- int fd, mmapflags, prot;
-
- xf86InitVidMem();
-
- /* If dev is NULL, linuxPciOpenFile will return -1, and this routine
- * will fail gracefully.
- */
- prot = ((Flags & VIDMEM_READONLY) == 0);
- if (((fd = linuxPciOpenFile(dev, prot)) < 0) ||
- (ioctl(fd, mmap_ioctl, 0) < 0))
- break;
-
-/* Note: IA-64 doesn't compile this and doesn't need to */
-#ifdef __ia64__
-
-# ifndef MAP_WRITECOMBINED
-# define MAP_WRITECOMBINED 0x00010000
-# endif
-# ifndef MAP_NONCACHED
-# define MAP_NONCACHED 0x00020000
-# endif
-
- if (Flags & VIDMEM_FRAMEBUFFER)
- mmapflags = MAP_SHARED | MAP_WRITECOMBINED;
- else
- mmapflags = MAP_SHARED | MAP_NONCACHED;
-
-#else /* !__ia64__ */
-
- mmapflags = (Flags & VIDMEM_FRAMEBUFFER) / VIDMEM_FRAMEBUFFER;
-
- if (ioctl(fd, PCIIOC_WRITE_COMBINE, mmapflags) < 0)
- break;
-
- mmapflags = MAP_SHARED;
-
-#endif /* ?__ia64__ */
-
-
- if (Flags & VIDMEM_READONLY)
- prot = PROT_READ;
- else
- prot = PROT_READ | PROT_WRITE;
-
- result = mmap(NULL, Size + Offset, prot, mmapflags, fd, realBase);
-
- if (!result || ((pointer)result == MAP_FAILED))
- return NULL;
-
- xf86MakeNewMapping(ScreenNum, Flags, realBase, Size + Offset, result);
-
- return result + Offset;
- } while (0);
-
- if (mmap_ioctl == PCIIOC_MMAP_IS_MEM)
- return xf86MapVidMem(ScreenNum, Flags, Base, Size);
-
- return NULL;
-}
-
-static int
-linuxOpenLegacy(struct pci_device *dev, char *name)
-{
- static const char PREFIX[] = "/sys/class/pci_bus/%04x:%02x/%s";
- char path[sizeof(PREFIX) + 10];
- int fd = -1;
-
- while (dev != NULL) {
- snprintf(path, sizeof(path) - 1, PREFIX, dev->domain, dev->bus, name);
- fd = open(path, O_RDWR);
- if (fd >= 0) {
- return fd;
- }
-
- dev = get_parent_bridge(dev);
- }
-
- return fd;
-}
-
-/*
- * xf86MapDomainMemory - memory map PCI domain memory
- *
- * This routine maps the memory region in the domain specified by Tag and
- * returns a pointer to it. The pointer is saved for future use if it's in
- * the legacy ISA memory space (memory in a domain between 0 and 1MB).
- */
-pointer
-xf86MapDomainMemory(int ScreenNum, int Flags, struct pci_device *dev,
- ADDRESS Base, unsigned long Size)
-{
- int fd = -1;
- pointer addr;
-
- /*
- * We use /proc/bus/pci on non-legacy addresses or if the Linux sysfs
- * legacy_mem interface is unavailable.
- */
- if ((Base > 1024*1024) || ((fd = linuxOpenLegacy(dev, "legacy_mem")) < 0))
- return linuxMapPci(ScreenNum, Flags, dev, Base, Size,
- PCIIOC_MMAP_IS_MEM);
- else
- addr = mmap(NULL, Size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, Base);
-
- if (fd >= 0)
- close(fd);
- if (addr == NULL || addr == MAP_FAILED) {
- perror("mmap failure");
- FatalError("xf86MapDomainMem(): mmap() failure\n");
- }
- return addr;
-}
-
-/**
- * Map I/O space in this domain
- *
- * Each domain has a legacy ISA I/O space. This routine will try to
- * map it using the Linux sysfs legacy_io interface. If that fails,
- * it'll fall back to using /proc/bus/pci.
- *
- * If the legacy_io interface \b does exist, the file descriptor (\c fd below)
- * will be saved in the \c DomainMmappedIO array in the upper bits of the
- * pointer. Callers will do I/O with small port numbers (<64k values), so
- * the platform I/O code can extract the port number and the \c fd, \c lseek
- * to the port number in the legacy_io file, and issue the read or write.
- *
- * This has no means of returning failure, so all errors are fatal
- */
-IOADDRESS
-xf86MapLegacyIO(struct pci_device *dev)
-{
- const int domain = dev->domain;
- struct pci_device *bridge = get_parent_bridge(dev);
- int fd;
-
- if (domain >= MAX_DOMAINS)
- FatalError("xf86MapLegacyIO(): domain out of range\n");
-
- if (DomainMmappedIO[domain] == NULL) {
- /* Permanently map all of I/O space */
- fd = linuxOpenLegacy(bridge, "legacy_io");
- if (fd < 0) {
- DomainMmappedIO[domain] = linuxMapPci(-1, VIDMEM_MMIO, bridge,
- 0, linuxGetIOSize(bridge),
- PCIIOC_MMAP_IS_IO);
- }
- else { /* legacy_io file exists, encode fd */
- DomainMmappedIO[domain] = (pointer)(intptr_t)(fd << 24);
- }
- }
-
- return (IOADDRESS)DomainMmappedIO[domain];
-}
-
+/*
+ * Copyright 1998 by Concurrent Computer Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Concurrent Computer
+ * Corporation not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Concurrent Computer Corporation makes no representations
+ * about the suitability of this software for any purpose. It is
+ * provided "as is" without express or implied warranty.
+ *
+ * CONCURRENT COMPUTER CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD
+ * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CONCURRENT COMPUTER CORPORATION BE
+ * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
+ * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ *
+ * Copyright 1998 by Metro Link Incorporated
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Metro Link
+ * Incorporated not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Metro Link Incorporated makes no representations
+ * about the suitability of this software for any purpose. It is
+ * provided "as is" without express or implied warranty.
+ *
+ * METRO LINK INCORPORATED DISCLAIMS ALL WARRANTIES WITH REGARD
+ * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL METRO LINK INCORPORATED BE
+ * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
+ * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include <stdio.h>
+#include "xf86_OSlib.h"
+#include "Pci.h"
+
+static const struct pci_id_match match_host_bridge = {
+ PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY,
+ (PCI_CLASS_BRIDGE << 16) | (PCI_SUBCLASS_BRIDGE_HOST << 8),
+ 0x0000ffff00, 0
+};
+
+#define MAX_DOMAINS 257
+static pointer DomainMmappedIO[MAX_DOMAINS];
+
+void
+linuxPciInit(void)
+{
+ memset(DomainMmappedIO, 0, sizeof(DomainMmappedIO));
+}
+
+/**
+ * \bug
+ * The generation of the procfs file name for the domain != 0 case may not be
+ * correct.
+ */
+static int
+linuxPciOpenFile(struct pci_device *dev, Bool write)
+{
+ static struct pci_device *last_dev = NULL;
+ static int fd = -1,is_write = 0;
+ char file[64];
+ struct stat ignored;
+ static int is26 = -1;
+
+ if (dev == NULL) {
+ return -1;
+ }
+
+ if (is26 == -1) {
+ is26 = (stat("/sys/bus/pci", &ignored) < 0) ? 0 : 1;
+ }
+
+ if (fd == -1 || (write && (!is_write)) || (last_dev != dev)) {
+ if (fd != -1) {
+ close(fd);
+ fd = -1;
+ }
+
+ if (is26) {
+ sprintf(file,"/sys/bus/pci/devices/%04u:%02x:%02x.%01x/config",
+ dev->domain, dev->bus, dev->dev, dev->func);
+ } else {
+ if (dev->domain == 0) {
+ sprintf(file,"/proc/bus/pci/%02x", dev->bus);
+ if (stat(file, &ignored) < 0) {
+ sprintf(file, "/proc/bus/pci/0000:%02x/%02x.%1x",
+ dev->bus, dev->dev, dev->func);
+ } else {
+ sprintf(file, "/proc/bus/pci/%02x/%02x.%1x",
+ dev->bus, dev->dev, dev->func);
+ }
+ } else {
+ sprintf(file,"/proc/bus/pci/%02x%02x", dev->domain, dev->bus);
+ if (stat(file, &ignored) < 0) {
+ sprintf(file, "/proc/bus/pci/%04x:%04x/%02x.%1x",
+ dev->domain, dev->bus, dev->dev, dev->func);
+ } else {
+ sprintf(file, "/proc/bus/pci/%02x%02x/%02x.%1x",
+ dev->domain, dev->bus, dev->dev, dev->func);
+ }
+ }
+ }
+
+ if (write) {
+ fd = open(file,O_RDWR);
+ if (fd != -1) is_write = TRUE;
+ } else {
+ switch (is_write) {
+ case TRUE:
+ fd = open(file,O_RDWR);
+ if (fd > -1)
+ break;
+ default:
+ fd = open(file,O_RDONLY);
+ is_write = FALSE;
+ }
+ }
+
+ last_dev = dev;
+ }
+
+ return fd;
+}
+
+/*
+ * Compiling the following simply requires the presence of <linux/pci.c>.
+ * Actually running this is another matter altogether...
+ *
+ * This scheme requires that the kernel allow mmap()'ing of a host bridge's I/O
+ * and memory spaces through its /proc/bus/pci/BUS/DFN entry. Which one is
+ * determined by a prior ioctl().
+ *
+ * For the sparc64 port, this means 2.4.12 or later. For ppc, this
+ * functionality is almost, but not quite there yet. Alpha and other kernel
+ * ports to multi-domain architectures still need to implement this.
+ *
+ * This scheme is also predicated on the use of an IOADDRESS compatible type to
+ * designate I/O addresses. Although IOADDRESS is defined as an unsigned
+ * integral type, it is actually the virtual address of, i.e. a pointer to, the
+ * I/O port to access. And so, the inX/outX macros in "compiler.h" need to be
+ * #define'd appropriately (as is done on SPARC's).
+ *
+ * Another requirement to port this scheme to another multi-domain architecture
+ * is to add the appropriate entries in the pciControllerSizes array below.
+ *
+ * TO DO: Address the deleterious reaction some host bridges have to master
+ * aborts. This is already done for secondary PCI buses, but not yet
+ * for accesses to primary buses (except for the SPARC port, where
+ * master aborts are avoided during PCI scans).
+ */
+
+#include <linux/pci.h>
+
+#ifndef PCIIOC_BASE /* Ioctls for /proc/bus/pci/X/Y nodes. */
+#define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
+
+/* Get controller for PCI device. */
+#define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00)
+/* Set mmap state to I/O space. */
+#define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01)
+/* Set mmap state to MEM space. */
+#define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02)
+/* Enable/disable write-combining. */
+#define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03)
+
+#endif
+
+/* This probably shouldn't be Linux-specific */
+static struct pci_device *
+get_parent_bridge(struct pci_device *dev)
+{
+ struct pci_id_match bridge_match = {
+ PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY,
+ (PCI_CLASS_BRIDGE << 16) | (PCI_SUBCLASS_BRIDGE_PCI << 8),
+ 0
+ };
+ struct pci_device *bridge;
+ struct pci_device_iterator *iter;
+
+ if (dev == NULL) {
+ return NULL;
+ }
+
+ iter = pci_id_match_iterator_create(& bridge_match);
+ if (iter == NULL) {
+ return NULL;
+ }
+
+ while ((bridge = pci_device_next(iter)) != NULL) {
+ if (bridge->domain == dev->domain) {
+ const struct pci_bridge_info *info =
+ pci_device_get_bridge_info(bridge);
+
+ if (info != NULL) {
+ if (info->secondary_bus == dev->bus) {
+ break;
+ }
+ }
+ }
+ }
+
+ pci_iterator_destroy(iter);
+
+ return bridge;
+}
+
+/*
+ * This is ugly, but until I can extract this information from the kernel,
+ * it'll have to do. The default I/O space size is 64K, and 4G for memory.
+ * Anything else needs to go in this table. (PowerPC folk take note.)
+ *
+ * Note that Linux/SPARC userland is 32-bit, so 4G overflows to zero here.
+ *
+ * Please keep this table in ascending vendor/device order.
+ */
+static const struct pciSizes {
+ unsigned short vendor, device;
+ unsigned long io_size, mem_size;
+} pciControllerSizes[] = {
+ {
+ PCI_VENDOR_SUN, PCI_CHIP_PSYCHO,
+ 1U << 16, 1U << 31
+ },
+ {
+ PCI_VENDOR_SUN, PCI_CHIP_SCHIZO,
+ 1U << 24, 1U << 31 /* ??? */
+ },
+ {
+ PCI_VENDOR_SUN, PCI_CHIP_SABRE,
+ 1U << 24, (unsigned long)(1ULL << 32)
+ },
+ {
+ PCI_VENDOR_SUN, PCI_CHIP_HUMMINGBIRD,
+ 1U << 24, (unsigned long)(1ULL << 32)
+ }
+};
+#define NUM_SIZES (sizeof(pciControllerSizes) / sizeof(pciControllerSizes[0]))
+
+static const struct pciSizes *
+linuxGetSizesStruct(const struct pci_device *dev)
+{
+ static const struct pciSizes default_size = {
+ 0, 0, 1U << 16, (unsigned long)(1ULL << 32)
+ };
+ int i;
+
+ /* Look up vendor/device */
+ if (dev != NULL) {
+ for (i = 0; i < NUM_SIZES; i++) {
+ if ((dev->vendor_id == pciControllerSizes[i].vendor)
+ && (dev->device_id == pciControllerSizes[i].device)) {
+ return & pciControllerSizes[i];
+ }
+ }
+ }
+
+ /* Default to 64KB I/O and 4GB memory. */
+ return & default_size;
+}
+
+static __inline__ unsigned long
+linuxGetIOSize(const struct pci_device *dev)
+{
+ const struct pciSizes * const sizes = linuxGetSizesStruct(dev);
+ return sizes->io_size;
+}
+
+static pointer
+linuxMapPci(int ScreenNum, int Flags, struct pci_device *dev,
+ ADDRESS Base, unsigned long Size, int mmap_ioctl)
+{
+ /* Align to page boundary */
+ const ADDRESS realBase = Base & ~(getpagesize() - 1);
+ const ADDRESS Offset = Base - realBase;
+
+ do {
+ unsigned char *result;
+ int fd, mmapflags, prot;
+
+ xf86InitVidMem();
+
+ /* If dev is NULL, linuxPciOpenFile will return -1, and this routine
+ * will fail gracefully.
+ */
+ prot = ((Flags & VIDMEM_READONLY) == 0);
+ if (((fd = linuxPciOpenFile(dev, prot)) < 0) ||
+ (ioctl(fd, mmap_ioctl, 0) < 0))
+ break;
+
+/* Note: IA-64 doesn't compile this and doesn't need to */
+#ifdef __ia64__
+
+# ifndef MAP_WRITECOMBINED
+# define MAP_WRITECOMBINED 0x00010000
+# endif
+# ifndef MAP_NONCACHED
+# define MAP_NONCACHED 0x00020000
+# endif
+
+ if (Flags & VIDMEM_FRAMEBUFFER)
+ mmapflags = MAP_SHARED | MAP_WRITECOMBINED;
+ else
+ mmapflags = MAP_SHARED | MAP_NONCACHED;
+
+#else /* !__ia64__ */
+
+ mmapflags = (Flags & VIDMEM_FRAMEBUFFER) / VIDMEM_FRAMEBUFFER;
+
+ if (ioctl(fd, PCIIOC_WRITE_COMBINE, mmapflags) < 0)
+ break;
+
+ mmapflags = MAP_SHARED;
+
+#endif /* ?__ia64__ */
+
+
+ if (Flags & VIDMEM_READONLY)
+ prot = PROT_READ;
+ else
+ prot = PROT_READ | PROT_WRITE;
+
+ result = mmap(NULL, Size + Offset, prot, mmapflags, fd, realBase);
+
+ if (!result || ((pointer)result == MAP_FAILED))
+ return NULL;
+
+ xf86MakeNewMapping(ScreenNum, Flags, realBase, Size + Offset, result);
+
+ return result + Offset;
+ } while (0);
+
+ if (mmap_ioctl == PCIIOC_MMAP_IS_MEM)
+ return xf86MapVidMem(ScreenNum, Flags, Base, Size);
+
+ return NULL;
+}
+
+static int
+linuxOpenLegacy(struct pci_device *dev, char *name)
+{
+ static const char PREFIX[] = "/sys/class/pci_bus/%04x:%02x/%s";
+ char path[sizeof(PREFIX) + 10];
+ int fd = -1;
+
+ while (dev != NULL) {
+ snprintf(path, sizeof(path) - 1, PREFIX, dev->domain, dev->bus, name);
+ fd = open(path, O_RDWR);
+ if (fd >= 0) {
+ return fd;
+ }
+
+ dev = get_parent_bridge(dev);
+ }
+
+ return fd;
+}
+
+/*
+ * xf86MapDomainMemory - memory map PCI domain memory
+ *
+ * This routine maps the memory region in the domain specified by Tag and
+ * returns a pointer to it. The pointer is saved for future use if it's in
+ * the legacy ISA memory space (memory in a domain between 0 and 1MB).
+ */
+pointer
+xf86MapDomainMemory(int ScreenNum, int Flags, struct pci_device *dev,
+ ADDRESS Base, unsigned long Size)
+{
+ int fd = -1;
+ pointer addr;
+
+ /*
+ * We use /proc/bus/pci on non-legacy addresses or if the Linux sysfs
+ * legacy_mem interface is unavailable.
+ */
+ if ((Base > 1024*1024) || ((fd = linuxOpenLegacy(dev, "legacy_mem")) < 0))
+ return linuxMapPci(ScreenNum, Flags, dev, Base, Size,
+ PCIIOC_MMAP_IS_MEM);
+ else
+ addr = mmap(NULL, Size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, Base);
+
+ if (fd >= 0)
+ close(fd);
+ if (addr == NULL || addr == MAP_FAILED) {
+ perror("mmap failure");
+ FatalError("xf86MapDomainMem(): mmap() failure\n");
+ }
+ return addr;
+}
+
+/**
+ * Map I/O space in this domain
+ *
+ * Each domain has a legacy ISA I/O space. This routine will try to
+ * map it using the Linux sysfs legacy_io interface. If that fails,
+ * it'll fall back to using /proc/bus/pci.
+ *
+ * If the legacy_io interface \b does exist, the file descriptor (\c fd below)
+ * will be saved in the \c DomainMmappedIO array in the upper bits of the
+ * pointer. Callers will do I/O with small port numbers (<64k values), so
+ * the platform I/O code can extract the port number and the \c fd, \c lseek
+ * to the port number in the legacy_io file, and issue the read or write.
+ *
+ * This has no means of returning failure, so all errors are fatal
+ */
+IOADDRESS
+xf86MapLegacyIO(struct pci_device *dev)
+{
+ const int domain = dev->domain;
+ struct pci_device *bridge = get_parent_bridge(dev);
+ int fd;
+
+ if (domain >= MAX_DOMAINS)
+ FatalError("xf86MapLegacyIO(): domain out of range\n");
+
+ if (DomainMmappedIO[domain] == NULL) {
+ /* Permanently map all of I/O space */
+ fd = linuxOpenLegacy(bridge, "legacy_io");
+ if (fd < 0) {
+ DomainMmappedIO[domain] = linuxMapPci(-1, VIDMEM_MMIO, bridge,
+ 0, linuxGetIOSize(bridge),
+ PCIIOC_MMAP_IS_IO);
+ }
+ else { /* legacy_io file exists, encode fd */
+ DomainMmappedIO[domain] = (pointer)(intptr_t)(fd << 24);
+ }
+ }
+
+ return (IOADDRESS)DomainMmappedIO[domain];
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 05:49:47 +0000