[PATCH v7 12/50] powerpc/powernv: Track M64 segment consumption

Gavin Shan
2015-11-04T13:14:00Z

As we track M32 segment consumption, this introduces an array to
the PHB to track the mapping between M64 segment and PE number.
The information is going to be used to find M64 segment from the
PE number during PCI unplugging time in subsequent patches.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 10 ++++++++--
arch/powerpc/platforms/powernv/pci.h | 3 ++-
2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 4ab93f8..76ce694 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -315,6 +315,7 @@ static int pnv_ioda2_pick_m64_pe(struct pci_bus *bus, bool all)
phb->ioda.total_pe_num) {
pe = &phb->ioda.pe_array[i];

+ phb->ioda.m64_segmap[pe->pe_number] = pe->pe_number;
if (!master_pe) {
pe->flags |= PNV_IODA_PE_MASTER;
INIT_LIST_HEAD(&pe->slaves);
@@ -3018,7 +3019,7 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
{
struct pci_controller *hose;
struct pnv_phb *phb;
- unsigned long size, m32map_off, pemap_off, iomap_off = 0;
+ unsigned long size, m64map_off, m32map_off, pemap_off, iomap_off = 0;
const __be64 *prop64;
const __be32 *prop32;
int i, len;
@@ -3103,6 +3104,8 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,

/* Allocate aux data & arrays. We don't have IO ports on PHB3 */
size = _ALIGN_UP(phb->ioda.total_pe_num / 8, sizeof(unsigned long));
+ m64map_off = size;
+ size += phb->ioda.total_pe_num * sizeof(phb->ioda.m64_segmap[0]);
m32map_off = size;
size += phb->ioda.total_pe_num * sizeof(phb->ioda.m32_segmap[0]);
if (phb->type == PNV_PHB_IODA1) {
@@ -3113,9 +3116,12 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
size += phb->ioda.total_pe_num * sizeof(struct pnv_ioda_pe);
aux = memblock_virt_alloc(size, 0);
phb->ioda.pe_alloc = aux;
+ phb->ioda.m64_segmap = aux + m64map_off;
phb->ioda.m32_segmap = aux + m32map_off;
- for (i = 0; i < phb->ioda.total_pe_num; i++)
+ for (i = 0; i < phb->ioda.total_pe_num; i++) {
+ phb->ioda.m64_segmap[i] = IODA_INVALID_PE;
phb->ioda.m32_segmap[i] = IODA_INVALID_PE;
+ }
if (phb->type == PNV_PHB_IODA1) {
phb->ioda.io_segmap = aux + iomap_off;
for (i = 0; i < phb->ioda.total_pe_num; i++)
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index 2e01edd..671fd13 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -147,7 +147,8 @@ struct pnv_phb {
unsigned long *pe_alloc;
struct pnv_ioda_pe *pe_array;

- /* M32 & IO segment maps */
+ /* M64/M32/IO segment maps */
+ int *m64_segmap;
int *m32_segmap;
int *io_segmap;

--
2.1.0