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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/pci/hotplug.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/pci/hotplug.c')
-rw-r--r-- | drivers/pci/hotplug.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/pci/hotplug.c b/drivers/pci/hotplug.c new file mode 100644 index 0000000..d471b3e --- /dev/null +++ b/drivers/pci/hotplug.c @@ -0,0 +1,163 @@ +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/module.h> +#include "pci.h" + +int pci_hotplug (struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size) +{ + struct pci_dev *pdev; + char *scratch; + int i = 0; + int length = 0; + + if (!dev) + return -ENODEV; + + pdev = to_pci_dev(dev); + if (!pdev) + return -ENODEV; + + scratch = buffer; + + /* stuff we want to pass to /sbin/hotplug */ + envp[i++] = scratch; + length += scnprintf (scratch, buffer_size - length, "PCI_CLASS=%04X", + pdev->class); + if ((buffer_size - length <= 0) || (i >= num_envp)) + return -ENOMEM; + ++length; + scratch += length; + + envp[i++] = scratch; + length += scnprintf (scratch, buffer_size - length, "PCI_ID=%04X:%04X", + pdev->vendor, pdev->device); + if ((buffer_size - length <= 0) || (i >= num_envp)) + return -ENOMEM; + ++length; + scratch += length; + + envp[i++] = scratch; + length += scnprintf (scratch, buffer_size - length, + "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, + pdev->subsystem_device); + if ((buffer_size - length <= 0) || (i >= num_envp)) + return -ENOMEM; + ++length; + scratch += length; + + envp[i++] = scratch; + length += scnprintf (scratch, buffer_size - length, "PCI_SLOT_NAME=%s", + pci_name(pdev)); + if ((buffer_size - length <= 0) || (i >= num_envp)) + return -ENOMEM; + + envp[i] = NULL; + + return 0; +} + +static int pci_visit_bus (struct pci_visit * fn, struct pci_bus_wrapped *wrapped_bus, struct pci_dev_wrapped *wrapped_parent) +{ + struct list_head *ln; + struct pci_dev *dev; + struct pci_dev_wrapped wrapped_dev; + int result = 0; + + pr_debug("PCI: Scanning bus %04x:%02x\n", pci_domain_nr(wrapped_bus->bus), + wrapped_bus->bus->number); + + if (fn->pre_visit_pci_bus) { + result = fn->pre_visit_pci_bus(wrapped_bus, wrapped_parent); + if (result) + return result; + } + + ln = wrapped_bus->bus->devices.next; + while (ln != &wrapped_bus->bus->devices) { + dev = pci_dev_b(ln); + ln = ln->next; + + memset(&wrapped_dev, 0, sizeof(struct pci_dev_wrapped)); + wrapped_dev.dev = dev; + + result = pci_visit_dev(fn, &wrapped_dev, wrapped_bus); + if (result) + return result; + } + + if (fn->post_visit_pci_bus) + result = fn->post_visit_pci_bus(wrapped_bus, wrapped_parent); + + return result; +} + +static int pci_visit_bridge (struct pci_visit * fn, + struct pci_dev_wrapped *wrapped_dev, + struct pci_bus_wrapped *wrapped_parent) +{ + struct pci_bus *bus; + struct pci_bus_wrapped wrapped_bus; + int result = 0; + + pr_debug("PCI: Scanning bridge %s\n", pci_name(wrapped_dev->dev)); + + if (fn->visit_pci_dev) { + result = fn->visit_pci_dev(wrapped_dev, wrapped_parent); + if (result) + return result; + } + + bus = wrapped_dev->dev->subordinate; + if (bus) { + memset(&wrapped_bus, 0, sizeof(struct pci_bus_wrapped)); + wrapped_bus.bus = bus; + + result = pci_visit_bus(fn, &wrapped_bus, wrapped_dev); + } + return result; +} + +/** + * pci_visit_dev - scans the pci buses. + * Every bus and every function is presented to a custom + * function that can act upon it. + */ +int pci_visit_dev(struct pci_visit *fn, struct pci_dev_wrapped *wrapped_dev, + struct pci_bus_wrapped *wrapped_parent) +{ + struct pci_dev* dev = wrapped_dev ? wrapped_dev->dev : NULL; + int result = 0; + + if (!dev) + return 0; + + if (fn->pre_visit_pci_dev) { + result = fn->pre_visit_pci_dev(wrapped_dev, wrapped_parent); + if (result) + return result; + } + + switch (dev->class >> 8) { + case PCI_CLASS_BRIDGE_PCI: + result = pci_visit_bridge(fn, wrapped_dev, + wrapped_parent); + if (result) + return result; + break; + default: + pr_debug("PCI: Scanning device %s\n", pci_name(dev)); + if (fn->visit_pci_dev) { + result = fn->visit_pci_dev (wrapped_dev, + wrapped_parent); + if (result) + return result; + } + } + + if (fn->post_visit_pci_dev) + result = fn->post_visit_pci_dev(wrapped_dev, wrapped_parent); + + return result; +} +EXPORT_SYMBOL(pci_visit_dev); |