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authorLinus Torvalds <torvalds@linux-foundation.org>2011-08-19 13:02:37 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-08-19 13:02:37 -0400
commit0c3bef612881ee6216a36952ffaabfc35b83545c (patch)
tree46e69e46d557c319ff3f261f37f1c184eaa9b844 /drivers/pci/hotplug
parent01b883358ba4b616d9d161b43af4bb5ee8124fe8 (diff)
parent69566dd8be42dea7a22f625abc96e65bb4b45d1f (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI: OF: Don't crash when bridge parent is NULL. PCI: export pcie_bus_configure_settings symbol PCI: code and comments cleanup PCI: make cardbus-bridge resources optional PCI: make SRIOV resources optional PCI : ability to relocate assigned pci-resources PCI: honor child buses add_size in hot plug configuration PCI: Set PCI-E Max Payload Size on fabric
Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/pcihp_slot.c45
1 files changed, 1 insertions, 44 deletions
diff --git a/drivers/pci/hotplug/pcihp_slot.c b/drivers/pci/hotplug/pcihp_slot.c
index 749fdf070319..753b21aaea61 100644
--- a/drivers/pci/hotplug/pcihp_slot.c
+++ b/drivers/pci/hotplug/pcihp_slot.c
@@ -158,47 +158,6 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
158 */ 158 */
159} 159}
160 160
161/* Program PCIE MaxPayload setting on device: ensure parent maxpayload <= device */
162static int pci_set_payload(struct pci_dev *dev)
163{
164 int pos, ppos;
165 u16 pctl, psz;
166 u16 dctl, dsz, dcap, dmax;
167 struct pci_dev *parent;
168
169 parent = dev->bus->self;
170 pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
171 if (!pos)
172 return 0;
173
174 /* Read Device MaxPayload capability and setting */
175 pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &dctl);
176 pci_read_config_word(dev, pos + PCI_EXP_DEVCAP, &dcap);
177 dsz = (dctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5;
178 dmax = (dcap & PCI_EXP_DEVCAP_PAYLOAD);
179
180 /* Read Parent MaxPayload setting */
181 ppos = pci_find_capability(parent, PCI_CAP_ID_EXP);
182 if (!ppos)
183 return 0;
184 pci_read_config_word(parent, ppos + PCI_EXP_DEVCTL, &pctl);
185 psz = (pctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5;
186
187 /* If parent payload > device max payload -> error
188 * If parent payload > device payload -> set speed
189 * If parent payload <= device payload -> do nothing
190 */
191 if (psz > dmax)
192 return -1;
193 else if (psz > dsz) {
194 dev_info(&dev->dev, "Setting MaxPayload to %d\n", 128 << psz);
195 pci_write_config_word(dev, pos + PCI_EXP_DEVCTL,
196 (dctl & ~PCI_EXP_DEVCTL_PAYLOAD) +
197 (psz << 5));
198 }
199 return 0;
200}
201
202void pci_configure_slot(struct pci_dev *dev) 161void pci_configure_slot(struct pci_dev *dev)
203{ 162{
204 struct pci_dev *cdev; 163 struct pci_dev *cdev;
@@ -210,9 +169,7 @@ void pci_configure_slot(struct pci_dev *dev)
210 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) 169 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
211 return; 170 return;
212 171
213 ret = pci_set_payload(dev); 172 pcie_bus_configure_settings(dev->bus, dev->bus->self->pcie_mpss);
214 if (ret)
215 dev_warn(&dev->dev, "could not set device max payload\n");
216 173
217 memset(&hpp, 0, sizeof(hpp)); 174 memset(&hpp, 0, sizeof(hpp));
218 ret = pci_get_hp_params(dev, &hpp); 175 ret = pci_get_hp_params(dev, &hpp);