LOG_MODULE("PCI")
static DEFINE_LLIST(pci_devices);
+static DECLARE_HASHTABLE(pci_devcache, 8);
static struct device* pcidev_cat;
+static struct device_def pci_def;
void
pci_probe_msi_info(struct pci_device* device);
+static inline void
+pci_log_device(struct pci_device* pcidev)
+{
+ pciaddr_t loc = pcidev->loc;
+ struct device_def* binddef = pcidev->binding.def;
+
+ if (!binddef) {
+ kprintf("pci.%d:%d:%d, no binding",
+ PCILOC_BUS(loc),
+ PCILOC_DEV(loc),
+ PCILOC_FN(loc));
+ return;
+ }
+
+ kprintf("pci.%d:%d:%d, dev.%xh:%xh.%d, %s",
+ PCILOC_BUS(loc),
+ PCILOC_DEV(loc),
+ PCILOC_FN(loc),
+ binddef->class.fn_grp,
+ binddef->class.device,
+ binddef->class.variant,
+ binddef->name);
+}
+
static struct pci_device*
-pci_create_device(ptr_t pci_base, int devinfo)
+pci_create_device(pciaddr_t loc, ptr_t pci_base, int devinfo)
{
pci_reg_t class = pci_read_cspace(pci_base, 0x8);
struct hbucket* bucket = device_definitions_byif(DEVIF_PCI);
u32_t devid = PCI_DEV_DEVID(devinfo);
u32_t vendor = PCI_DEV_VENDOR(devinfo);
+ pci_reg_t intr = pci_read_cspace(pci_base, 0x3c);
+
+ struct pci_device* device = vzalloc(sizeof(struct pci_device));
+ device->class_info = class;
+ device->device_info = devinfo;
+ device->cspace_base = pci_base;
+ device->intr_info = intr;
+
+ device_create(&device->dev, pcidev_cat, DEV_IFSYS, NULL);
+
+ pci_probe_msi_info(device);
+ pci_probe_bar_info(device);
+
+ llist_append(&pci_devices, &device->dev_chain);
+ device_register(&device->dev, &pci_def.class, "%x", loc);
+ pci_def.class.variant++;
- kappendf(".%x:%x, ", vendor, devid);
+ // find a suitable binding
struct pci_device_def *pos, *n;
hashtable_bucket_foreach(bucket, pos, n, devdef.hlist_if)
}
}
- kappendf(KWARN "unknown device\n");
-
- return NULL;
+ goto done;
found:
- pci_reg_t intr = pci_read_cspace(pci_base, 0x3c);
-
- struct pci_device* device = vzalloc(sizeof(struct pci_device));
- device->class_info = class;
- device->device_info = devinfo;
- device->cspace_base = pci_base;
- device->intr_info = intr;
-
- device_create(&device->dev, pcidev_cat, DEV_IFSYS, NULL);
-
- pci_probe_msi_info(device);
- pci_probe_bar_info(device);
-
- kappendf("%s (dev.%x:%x:%x) \n",
- pos->devdef.name,
- pos->devdef.class.fn_grp,
- pos->devdef.class.device,
- pos->devdef.class.variant);
-
- if (!pos->devdef.init_for) {
- kappendf(KERROR "bad def\n");
- goto fail;
+ if (!pos->devdef.bind) {
+ kprintf(KERROR "pci_loc:%x, (%xh:%xh.%d) unbindable",
+ loc,
+ pos->devdef.class.fn_grp,
+ pos->devdef.class.device,
+ pos->devdef.class.variant);
+ goto done;
}
- int errno = pos->devdef.init_for(&pos->devdef, &device->dev);
+ int errno = pos->devdef.bind(&pos->devdef, &device->dev);
if (errno) {
- kappendf(KERROR "failed (e=%d)\n", errno);
- goto fail;
+ kprintf(KERROR "pci_loc:%x, (%xh:%xh.%d) failed, e=%d",
+ loc,
+ pos->devdef.class.fn_grp,
+ pos->devdef.class.device,
+ pos->devdef.class.variant,
+ errno);
+ goto done;
}
- llist_append(&pci_devices, &device->dev_chain);
- device_register(&device->dev, &pos->devdef.class, "%x:%x", vendor, devid);
+ device->binding.def = &pos->devdef;
+done:
return device;
-
-fail:
- vfree(device);
- return NULL;
}
void
-pci_probe_device(int bus, int dev, int funct)
+pci_probe_device(pciaddr_t pci_loc)
{
- u32_t base = PCI_ADDRESS(bus, dev, funct);
+ u32_t base = PCI_CFGADDR(pci_loc);
pci_reg_t reg1 = pci_read_cspace(base, 0);
// Vendor=0xffff则表示设备不存在
// 防止堆栈溢出
// QEMU的ICH9/Q35实现似乎有点问题，对于多功能设备的每一个功能的header type
// 都将第七位置位。而virtualbox 就没有这个毛病。
- if ((hdr_type & 0x80) && funct == 0) {
+ if ((hdr_type & 0x80) && PCILOC_FN(pci_loc) == 0) {
hdr_type = hdr_type & ~0x80;
// 探测多用途设备（multi-function device）
for (int i = 1; i < 7; i++) {
- pci_probe_device(bus, dev, i);
+ pci_probe_device(pci_loc + i);
}
}
- if (hdr_type != PCI_TDEV) {
- // XXX: 目前忽略所有桥接设备，比如PCI-PCI桥接器，或者是CardBus桥接器
- return;
+ struct pci_device *pos, *n;
+ hashtable_hash_foreach(pci_devcache, pci_loc, pos, n, dev_cache)
+ {
+ if (pos->loc == pci_loc) {
+ pci_log_device(pos);
+ return;
+ }
}
- kprintf("pci.%d:%d:%d", bus, dev, funct);
-
- pci_create_device(base, reg1);
+ struct pci_device* pcidev = pci_create_device(pci_loc, base, reg1);
+ if (pcidev) {
+ pcidev->loc = pci_loc;
+ hashtable_hash_in(pci_devcache, &pcidev->dev_cache, pci_loc);
+ pci_log_device(pcidev);
+ }
}
void
pci_scan()
{
- for (int bus = 0; bus < 256; bus++) {
- for (int dev = 0; dev < 32; dev++) {
- pci_probe_device(bus, dev, 0);
- }
+ for (u32_t loc = 0; loc < (pciaddr_t)-1; loc += 8) {
+ pci_probe_device((pciaddr_t)loc);
}
}
twimap_printf(map, "0x%x", PCI_DEV_CLASS(class));
}
+static void
+__pci_read_devinfo(struct twimap* map)
+{
+ int devinfo = twimap_data(map, struct pci_device*)->device_info;
+ twimap_printf(
+ map, "%x:%x", PCI_DEV_VENDOR(devinfo), PCI_DEV_DEVID(devinfo));
+}
+
static void
__pci_bar_read(struct twimap* map)
{
__pci_read_binding(struct twimap* map)
{
struct pci_device* pcidev = twimap_data(map, struct pci_device*);
- // check if device binding has been initialized
- struct device* dev = device_cast(&pcidev->dev);
- if (!dev) {
+ struct device_def* devdef = pcidev->binding.def;
+ if (!devdef) {
return;
}
- twimap_printf(map, "0x%x:0x%x", dev->ident.fn_grp, dev->ident.unique);
+ twimap_printf(map,
+ "%xh:%xh.%d",
+ devdef->class.fn_grp,
+ devdef->class.device,
+ devdef->class.variant);
+}
+
+static void
+__pci_trigger_bus_rescan(struct twimap* map)
+{
+ pci_scan();
}
void
struct twifs_node *pci_class = twifs_dir_node(NULL, "pci"), *pci_dev;
struct pci_device *pos, *n;
struct twimap* map;
+
+ map = twifs_mapping(pci_class, NULL, "rescan");
+ map->read = __pci_trigger_bus_rescan;
+
llist_for_each(pos, n, &pci_devices, dev_chain)
{
- pci_dev = twifs_dir_node(pci_class,
- "%.2d:%.2d:%.2d.%.4x:%.4x",
- PCI_BUS_NUM(pos->cspace_base),
- PCI_SLOT_NUM(pos->cspace_base),
- PCI_FUNCT_NUM(pos->cspace_base),
- PCI_DEV_VENDOR(pos->device_info),
- PCI_DEV_DEVID(pos->device_info));
+ pci_dev = twifs_dir_node(pci_class, "%x", pos->loc);
map = twifs_mapping(pci_dev, pos, "config");
map->read = __pci_read_cspace;
return 0;
}
+void
+pci_bind_instance(struct pci_device* pcidev, void* devobj)
+{
+ pcidev->dev.underlay = devobj;
+ pcidev->binding.dev = devobj;
+}
+
static struct device_def pci_def = {
.name = "pci3.0-hba",
.class = DEVCLASS(DEVIF_SOC, DEVFN_BUSIF, DEV_PCI),
git://scm.lunaixsky.com / lunaix-os.git / blobdiff