PCI: Make current and maximum bus speeds part of the PCI core

Move the max_bus_speed and cur_bus_speed into the pci_bus.  Expose the
values through the PCI slot driver instead of the hotplug slot driver.
Update all the hotplug drivers to use the pci_bus instead of their own
data structures.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/pci/slot.c b/drivers/pci/slot.c
index 8c02b6c..6f6b8d2 100644
--- a/drivers/pci/slot.c
+++ b/drivers/pci/slot.c
@@ -47,6 +47,54 @@ static ssize_t address_read_file(struct pci_slot *slot, char *buf)
 				slot->number);
 }
 
+/* these strings match up with the values in pci_bus_speed */
+static char *pci_bus_speed_strings[] = {
+	"33 MHz PCI",		/* 0x00 */
+	"66 MHz PCI",		/* 0x01 */
+	"66 MHz PCI-X", 	/* 0x02 */
+	"100 MHz PCI-X",	/* 0x03 */
+	"133 MHz PCI-X",	/* 0x04 */
+	NULL,			/* 0x05 */
+	NULL,			/* 0x06 */
+	NULL,			/* 0x07 */
+	NULL,			/* 0x08 */
+	"66 MHz PCI-X 266",	/* 0x09 */
+	"100 MHz PCI-X 266",	/* 0x0a */
+	"133 MHz PCI-X 266",	/* 0x0b */
+	NULL,			/* 0x0c */
+	NULL,			/* 0x0d */
+	NULL,			/* 0x0e */
+	NULL,			/* 0x0f */
+	NULL,			/* 0x10 */
+	"66 MHz PCI-X 533",	/* 0x11 */
+	"100 MHz PCI-X 533",	/* 0x12 */
+	"133 MHz PCI-X 533",	/* 0x13 */
+	"2.5 GT/s PCIe",	/* 0x14 */
+	"5.0 GT/s PCIe",	/* 0x15 */
+};
+
+static ssize_t bus_speed_read(enum pci_bus_speed speed, char *buf)
+{
+	const char *speed_string;
+
+	if (speed < ARRAY_SIZE(pci_bus_speed_strings))
+		speed_string = pci_bus_speed_strings[speed];
+	else
+		speed_string = "Unknown";
+
+	return sprintf(buf, "%s\n", speed_string);
+}
+
+static ssize_t max_speed_read_file(struct pci_slot *slot, char *buf)
+{
+	return bus_speed_read(slot->bus->max_bus_speed, buf);
+}
+
+static ssize_t cur_speed_read_file(struct pci_slot *slot, char *buf)
+{
+	return bus_speed_read(slot->bus->cur_bus_speed, buf);
+}
+
 static void pci_slot_release(struct kobject *kobj)
 {
 	struct pci_dev *dev;
@@ -66,9 +114,15 @@ static void pci_slot_release(struct kobject *kobj)
 
 static struct pci_slot_attribute pci_slot_attr_address =
 	__ATTR(address, (S_IFREG | S_IRUGO), address_read_file, NULL);
+static struct pci_slot_attribute pci_slot_attr_max_speed =
+	__ATTR(max_bus_speed, (S_IFREG | S_IRUGO), max_speed_read_file, NULL);
+static struct pci_slot_attribute pci_slot_attr_cur_speed =
+	__ATTR(cur_bus_speed, (S_IFREG | S_IRUGO), cur_speed_read_file, NULL);
 
 static struct attribute *pci_slot_default_attrs[] = {
 	&pci_slot_attr_address.attr,
+	&pci_slot_attr_max_speed.attr,
+	&pci_slot_attr_cur_speed.attr,
 	NULL,
 };