When VF BAR size is larger than 64MB, we group VFs in terms of M64 BAR,
which means those VFs in a group should form a compound PE.
This patch links those VF PEs into compound PE in this case.
Signed-off-by: Wei Yang <weiyang@xxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 843457b..157305f 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1345,6 +1345,7 @@ static void pnv_ioda_release_vf_PE(struct pci_dev *pdev, u16 num_vfs)
vf_index < (vf_group + 1) * vf_per_group &&
vf_index < num_vfs;
vf_index++)
+
for (vf_index1 = vf_group * vf_per_group;
vf_index1 < (vf_group + 1) * vf_per_group &&
vf_index1 < num_vfs;
@@ -1360,6 +1361,11 @@ static void pnv_ioda_release_vf_PE(struct pci_dev *pdev, u16 num_vfs)
__func__,
pdn->offset + vf_index1, rc);
}
+
+ /* Remove a Slave PE from Master PE */
+ pe = &phb->ioda.pe_array[pdn->offset + vf_index];
+ if (pe->flags & PNV_IODA_PE_SLAVE)
+ list_del(&pe->compound);
}
list_for_each_entry_safe(pe, pe_n, &phb->ioda.pe_list, list) {
@@ -1418,7 +1424,7 @@ static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs)
struct pci_bus *bus;
struct pci_controller *hose;
struct pnv_phb *phb;
- struct pnv_ioda_pe *pe;
+ struct pnv_ioda_pe *pe, *master_pe;
int pe_num;
u16 vf_index;
struct pci_dn *pdn;
@@ -1480,10 +1486,29 @@ static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs)
vf_per_group = roundup_pow_of_two(num_vfs) / pdn->m64_per_iov;
for (vf_group = 0; vf_group < M64_PER_IOV; vf_group++) {
+ master_pe = NULL;
+
for (vf_index = vf_group * vf_per_group;
vf_index < (vf_group + 1) * vf_per_group &&
vf_index < num_vfs;
vf_index++) {
+
+ /*
+ * Figure out the master PE and put all slave
+ * PEs to master PE's list.
+ */
+ pe = &phb->ioda.pe_array[pdn->offset + vf_index];
+ if (!master_pe) {
+ pe->flags |= PNV_IODA_PE_MASTER;
+ INIT_LIST_HEAD(&pe->slaves);
+ master_pe = pe;
+ } else {
+ pe->flags |= PNV_IODA_PE_SLAVE;
+ pe->master = master_pe;
+ list_add_tail(&pe->compound,
+ &master_pe->slaves);
+ }
+
for (vf_index1 = vf_group * vf_per_group;
vf_index1 < (vf_group + 1) * vf_per_group &&
vf_index1 < num_vfs;
--
1.7.9.5
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