powerpc/powernv: remove the unused pnv_pci_set_p2p function

[sfrench/cifs-2.6.git] / arch / powerpc / platforms / powernv / pci.c

diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index ef9448a907c63037d1da229f1cebc91573c0e575..8d28f2932c3b04bc5310ad6d950155b385248f5b 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -38,7 +38,6 @@
 #include "powernv.h"
 #include "pci.h"
 
-static DEFINE_MUTEX(p2p_mutex);
 static DEFINE_MUTEX(tunnel_mutex);
 
 int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id)
@@ -861,79 +860,6 @@ void pnv_pci_dma_bus_setup(struct pci_bus *bus)
        }
 }
 
-int pnv_pci_set_p2p(struct pci_dev *initiator, struct pci_dev *target, u64 desc)
-{
-       struct pci_controller *hose;
-       struct pnv_phb *phb_init, *phb_target;
-       struct pnv_ioda_pe *pe_init;
-       int rc;
-
-       if (!opal_check_token(OPAL_PCI_SET_P2P))
-               return -ENXIO;
-
-       hose = pci_bus_to_host(initiator->bus);
-       phb_init = hose->private_data;
-
-       hose = pci_bus_to_host(target->bus);
-       phb_target = hose->private_data;
-
-       pe_init = pnv_ioda_get_pe(initiator);
-       if (!pe_init)
-               return -ENODEV;
-
-       /*
-        * Configuring the initiator's PHB requires to adjust its
-        * TVE#1 setting. Since the same device can be an initiator
-        * several times for different target devices, we need to keep
-        * a reference count to know when we can restore the default
-        * bypass setting on its TVE#1 when disabling. Opal is not
-        * tracking PE states, so we add a reference count on the PE
-        * in linux.
-        *
-        * For the target, the configuration is per PHB, so we keep a
-        * target reference count on the PHB.
-        */
-       mutex_lock(&p2p_mutex);
-
-       if (desc & OPAL_PCI_P2P_ENABLE) {
-               /* always go to opal to validate the configuration */
-               rc = opal_pci_set_p2p(phb_init->opal_id, phb_target->opal_id,
-                                     desc, pe_init->pe_number);
-
-               if (rc != OPAL_SUCCESS) {
-                       rc = -EIO;
-                       goto out;
-               }
-
-               pe_init->p2p_initiator_count++;
-               phb_target->p2p_target_count++;
-       } else {
-               if (!pe_init->p2p_initiator_count ||
-                       !phb_target->p2p_target_count) {
-                       rc = -EINVAL;
-                       goto out;
-               }
-
-               if (--pe_init->p2p_initiator_count == 0)
-                       pnv_pci_ioda2_set_bypass(pe_init, true);
-
-               if (--phb_target->p2p_target_count == 0) {
-                       rc = opal_pci_set_p2p(phb_init->opal_id,
-                                             phb_target->opal_id, desc,
-                                             pe_init->pe_number);
-                       if (rc != OPAL_SUCCESS) {
-                               rc = -EIO;
-                               goto out;
-                       }
-               }
-       }
-       rc = 0;
-out:
-       mutex_unlock(&p2p_mutex);
-       return rc;
-}
-EXPORT_SYMBOL_GPL(pnv_pci_set_p2p);
-
 struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev)
 {
        struct pci_controller *hose = pci_bus_to_host(dev->bus);