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

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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>
This commit is contained in:
Matthew Wilcox
2009-12-13 08:11:32 -05:00
committed by Jesse Barnes
parent 536c8cb49e
commit 3749c51ac6
17 changed files with 246 additions and 498 deletions
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72
drivers/pci/hotplug/pciehp_hpc.c
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@@ -492,6 +492,7 @@ int pciehp_power_on_slot(struct slot * slot)
u16 slot_cmd;
u16 cmd_mask;
u16 slot_status;
u16 lnk_status;
int retval = 0;
/* Clear sticky power-fault bit from previous power failures */
@@ -523,6 +524,14 @@ int pciehp_power_on_slot(struct slot * slot)
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
retval = pciehp_readw(ctrl, PCI_EXP_LNKSTA, &lnk_status);
if (retval) {
ctrl_err(ctrl, "%s: Cannot read LNKSTA register\n",
__func__);
return retval;
}
pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status);
return retval;
}
@@ -610,37 +619,6 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
return IRQ_HANDLED;
}
int pciehp_get_max_link_speed(struct slot *slot, enum pci_bus_speed *value)
{
struct controller *ctrl = slot->ctrl;
enum pci_bus_speed lnk_speed;
u32 lnk_cap;
int retval = 0;
retval = pciehp_readl(ctrl, PCI_EXP_LNKCAP, &lnk_cap);
if (retval) {
ctrl_err(ctrl, "%s: Cannot read LNKCAP register\n", __func__);
return retval;
}
switch (lnk_cap & 0x000F) {
case 1:
lnk_speed = PCIE_SPEED_2_5GT;
break;
case 2:
lnk_speed = PCIE_SPEED_5_0GT;
break;
default:
lnk_speed = PCI_SPEED_UNKNOWN;
break;
}
*value = lnk_speed;
ctrl_dbg(ctrl, "Max link speed = %d\n", lnk_speed);
return retval;
}
int pciehp_get_max_lnk_width(struct slot *slot,
enum pcie_link_width *value)
{
@@ -691,38 +669,6 @@ int pciehp_get_max_lnk_width(struct slot *slot,
return retval;
}
int pciehp_get_cur_link_speed(struct slot *slot, enum pci_bus_speed *value)
{
struct controller *ctrl = slot->ctrl;
enum pci_bus_speed lnk_speed = PCI_SPEED_UNKNOWN;
int retval = 0;
u16 lnk_status;
retval = pciehp_readw(ctrl, PCI_EXP_LNKSTA, &lnk_status);
if (retval) {
ctrl_err(ctrl, "%s: Cannot read LNKSTATUS register\n",
__func__);
return retval;
}
switch (lnk_status & PCI_EXP_LNKSTA_CLS) {
case 1:
lnk_speed = PCIE_SPEED_2_5GT;
break;
case 2:
lnk_speed = PCIE_SPEED_5_0GT;
break;
default:
lnk_speed = PCI_SPEED_UNKNOWN;
break;
}
*value = lnk_speed;
ctrl_dbg(ctrl, "Current link speed = %d\n", lnk_speed);
return retval;
}
int pciehp_get_cur_lnk_width(struct slot *slot,
enum pcie_link_width *value)
{