PCI: Move pci_configure_slot() to drivers/pci/probe.c

Move pci_configure_slot() and related functions from
drivers/pci/hotplug/pcihp_slot to drivers/pci/probe.c.

This is to prepare for doing device configuration during the normal
enumeration process instead of just after hot-add.

No functional change.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index e3cf8a2e6292..6a198fc65999 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -6,6 +6,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/pci.h>
+#include <linux/pci_hotplug.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/cpumask.h>
@@ -1236,6 +1237,155 @@ int pci_setup_device(struct pci_dev *dev)
         return 0;
 }
 
+static struct hpp_type0 pci_default_type0 = {
+        .revision = 1,
+        .cache_line_size = 8,
+        .latency_timer = 0x40,
+        .enable_serr = 0,
+        .enable_perr = 0,
+};
+
+static void program_hpp_type0(struct pci_dev *dev, struct hpp_type0 *hpp)
+{
+        u16 pci_cmd, pci_bctl;
+
+        if (!hpp) {
+                /*
+                 * Perhaps we *should* use default settings for PCIe, but
+                 * pciehp didn't, so we won't either.
+                 */
+                if (pci_is_pcie(dev))
+                        return;
+                hpp = &pci_default_type0;
+        }
+
+        if (hpp->revision > 1) {
+                dev_warn(&dev->dev,
+                         "PCI settings rev %d not supported; using defaults\n",
+                         hpp->revision);
+                hpp = &pci_default_type0;
+        }
+
+        pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, hpp->cache_line_size);
+        pci_write_config_byte(dev, PCI_LATENCY_TIMER, hpp->latency_timer);
+        pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
+        if (hpp->enable_serr)
+                pci_cmd |= PCI_COMMAND_SERR;
+        else
+                pci_cmd &= ~PCI_COMMAND_SERR;
+        if (hpp->enable_perr)
+                pci_cmd |= PCI_COMMAND_PARITY;
+        else
+                pci_cmd &= ~PCI_COMMAND_PARITY;
+        pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
+
+        /* Program bridge control value */
+        if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
+                pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
+                                      hpp->latency_timer);
+                pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
+                if (hpp->enable_serr)
+                        pci_bctl |= PCI_BRIDGE_CTL_SERR;
+                else
+                        pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
+                if (hpp->enable_perr)
+                        pci_bctl |= PCI_BRIDGE_CTL_PARITY;
+                else
+                        pci_bctl &= ~PCI_BRIDGE_CTL_PARITY;
+                pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl);
+        }
+}
+
+static void program_hpp_type1(struct pci_dev *dev, struct hpp_type1 *hpp)
+{
+        if (hpp)
+                dev_warn(&dev->dev, "PCI-X settings not supported\n");
+}
+
+static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
+{
+        int pos;
+        u32 reg32;
+
+        if (!hpp)
+                return;
+
+        if (hpp->revision > 1) {
+                dev_warn(&dev->dev, "PCIe settings rev %d not supported\n",
+                         hpp->revision);
+                return;
+        }
+
+        /* Initialize Device Control Register */
+        pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL,
+                        ~hpp->pci_exp_devctl_and, hpp->pci_exp_devctl_or);
+
+        /* Initialize Link Control Register */
+        if (dev->subordinate)
+                pcie_capability_clear_and_set_word(dev, PCI_EXP_LNKCTL,
+                        ~hpp->pci_exp_lnkctl_and, hpp->pci_exp_lnkctl_or);
+
+        /* Find Advanced Error Reporting Enhanced Capability */
+        pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
+        if (!pos)
+                return;
+
+        /* Initialize Uncorrectable Error Mask Register */
+        pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &reg32);
+        reg32 = (reg32 & hpp->unc_err_mask_and) | hpp->unc_err_mask_or;
+        pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, reg32);
+
+        /* Initialize Uncorrectable Error Severity Register */
+        pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &reg32);
+        reg32 = (reg32 & hpp->unc_err_sever_and) | hpp->unc_err_sever_or;
+        pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, reg32);
+
+        /* Initialize Correctable Error Mask Register */
+        pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &reg32);
+        reg32 = (reg32 & hpp->cor_err_mask_and) | hpp->cor_err_mask_or;
+        pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, reg32);
+
+        /* Initialize Advanced Error Capabilities and Control Register */
+        pci_read_config_dword(dev, pos + PCI_ERR_CAP, &reg32);
+        reg32 = (reg32 & hpp->adv_err_cap_and) | hpp->adv_err_cap_or;
+        pci_write_config_dword(dev, pos + PCI_ERR_CAP, reg32);
+
+        /*
+         * FIXME: The following two registers are not supported yet.
+         *
+         *   o Secondary Uncorrectable Error Severity Register
+         *   o Secondary Uncorrectable Error Mask Register
+         */
+}
+
+void pci_configure_slot(struct pci_dev *dev)
+{
+        struct pci_dev *cdev;
+        struct hotplug_params hpp;
+        int ret;
+
+        if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL ||
+                        (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
+                        (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
+                return;
+
+        pcie_bus_configure_settings(dev->bus);
+
+        memset(&hpp, 0, sizeof(hpp));
+        ret = pci_get_hp_params(dev, &hpp);
+
+        program_hpp_type2(dev, hpp.t2);
+        program_hpp_type1(dev, hpp.t1);
+        program_hpp_type0(dev, hpp.t0);
+
+        if (dev->subordinate) {
+                list_for_each_entry(cdev, &dev->subordinate->devices,
+                                    bus_list)
+                        pci_configure_slot(cdev);
+        }
+}
+EXPORT_SYMBOL_GPL(pci_configure_slot);
+
 static void pci_release_capabilities(struct pci_dev *dev)
 {
         pci_vpd_release(dev);