Except pnv_ioda_configure_pe(), all PE configuration related functions
are already PE oriented. The patch changes the return value from PE
number to PE instance for its callee for the purpose.
Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
---
v5:
* Split from PATCH[v4 07/21]
---
arch/powerpc/platforms/powernv/pci-ioda.c | 44 ++++++++++++++++---------------
arch/powerpc/platforms/powernv/pci.h | 3 ++-
2 files changed, 25 insertions(+), 22 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index fd2f898..6187f84 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -132,25 +132,26 @@ static inline bool pnv_pci_is_mem_pref_64(unsigned long flags)
(IORESOURCE_MEM_64 | IORESOURCE_PREFETCH));
}
-static void pnv_ioda_reserve_pe(struct pnv_phb *phb, int pe_no)
+static struct pnv_ioda_pe *pnv_ioda_reserve_pe(struct pnv_phb *phb, int pe_no)
{
if (!(pe_no >= 0 && pe_no < phb->ioda.total_pe)) {
pr_warn("%s: Invalid PE %d on PHB#%x\n",
__func__, pe_no, phb->hose->global_number);
- return;
+ return NULL;
}
if (test_and_set_bit(pe_no, phb->ioda.pe_alloc)) {
pr_warn("%s: PE %d was assigned on PHB#%x\n",
__func__, pe_no, phb->hose->global_number);
- return;
+ return NULL;
}
phb->ioda.pe_array[pe_no].phb = phb;
phb->ioda.pe_array[pe_no].pe_number = pe_no;
+ return &phb->ioda.pe_array[pe_no];
}
-static int pnv_ioda_alloc_pe(struct pnv_phb *phb)
+static struct pnv_ioda_pe *pnv_ioda_alloc_pe(struct pnv_phb *phb)
{
unsigned long pe_no;
unsigned long limit = phb->ioda.total_pe - 1;
@@ -163,12 +164,12 @@ static int pnv_ioda_alloc_pe(struct pnv_phb *phb)
break;
if (--limit >= phb->ioda.total_pe)
- return IODA_INVALID_PE;
+ return NULL;
} while (1);
phb->ioda.pe_array[pe_no].phb = phb;
phb->ioda.pe_array[pe_no].pe_number = pe_no;
- return pe_no;
+ return &phb->ioda.pe_array[pe_no];
}
static void pnv_ioda_free_pe(struct pnv_phb *phb, int pe)
@@ -389,8 +390,8 @@ static void pnv_ioda_reserve_m64_pe(struct pnv_phb *phb,
}
}
-static int pnv_ioda_pick_m64_pe(struct pnv_phb *phb,
- struct pci_bus *bus, int all)
+static struct pnv_ioda_pe *pnv_ioda_pick_m64_pe(struct pnv_phb *phb,
+ struct pci_bus *bus, int all)
{
resource_size_t segsz = phb->ioda.m64_segsize;
struct pci_dev *pdev;
@@ -401,13 +402,13 @@ static int pnv_ioda_pick_m64_pe(struct pnv_phb *phb,
int i;
if (!pnv_ioda_need_m64_pe(phb, bus))
- return IODA_INVALID_PE;
+ return NULL;
/* Allocate bitmap */
size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long));
pe_bitmap = kzalloc(size, GFP_KERNEL);
if (!pe_bitmap)
- return IODA_INVALID_PE;
+ return NULL;
/* The bridge's M64 window might be extended to PHB's M64
* window by intention to support PCI hotplug. So we have
@@ -444,7 +445,7 @@ static int pnv_ioda_pick_m64_pe(struct pnv_phb *phb,
/* No M64 window found ? */
if (bitmap_empty(pe_bitmap, phb->ioda.total_pe)) {
kfree(pe_bitmap);
- return IODA_INVALID_PE;
+ return NULL;
}
/* Figure out the master PE and put all slave PEs
@@ -495,7 +496,7 @@ static int pnv_ioda_pick_m64_pe(struct pnv_phb *phb,
}
kfree(pe_bitmap);
- return master_pe->pe_number;
+ return master_pe;
}
static void __init pnv_ioda_parse_m64_window(struct pnv_phb *phb)
@@ -1224,7 +1225,7 @@ static struct pnv_ioda_pe *pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all)
{
struct pci_controller *hose = pci_bus_to_host(bus);
struct pnv_phb *phb = hose->private_data;
- struct pnv_ioda_pe *pe;
+ struct pnv_ioda_pe *pe = NULL;
int pe_num = IODA_INVALID_PE;
/* For partial hotplug case, the PE instance hasn't been destroyed
@@ -1240,24 +1241,25 @@ static struct pnv_ioda_pe *pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all)
}
/* PE number for root bus should have been reserved */
- if (pci_is_root_bus(bus))
- pe_num = phb->ioda.root_pe;
+ if (pci_is_root_bus(bus) &&
+ phb->ioda.root_pe != IODA_INVALID_PE)
+ pe = &phb->ioda.pe_array[phb->ioda.root_pe];
/* Check if PE is determined by M64 */
- if (pe_num == IODA_INVALID_PE && phb->pick_m64_pe)
- pe_num = phb->pick_m64_pe(phb, bus, all);
+ if (!pe && phb->pick_m64_pe)
+ pe = phb->pick_m64_pe(phb, bus, all);
/* The PE number isn't pinned by M64 */
- if (pe_num == IODA_INVALID_PE)
- pe_num = pnv_ioda_alloc_pe(phb);
+ if (!pe)
+ pe = pnv_ioda_alloc_pe(phb);
- if (pe_num == IODA_INVALID_PE) {
+ if (!pe) {
pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n",
__func__, pci_domain_nr(bus), bus->number);
return NULL;
}
- pe = &phb->ioda.pe_array[pe_num];
+ pe_num = pe->pe_number;
pe->flags |= (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS);
pe->pbus = bus;
pe->pdev = NULL;
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index 45a6450..64c7f03 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -119,7 +119,8 @@ struct pnv_phb {
void (*shutdown)(struct pnv_phb *phb);
int (*init_m64)(struct pnv_phb *phb);
void (*reserve_m64_pe)(struct pnv_phb *phb, struct pci_bus *bus);
- int (*pick_m64_pe)(struct pnv_phb *phb, struct pci_bus *bus, int all);
+ struct pnv_ioda_pe * (*pick_m64_pe)(struct pnv_phb *phb,
+ struct pci_bus *bus, int all);
int (*get_pe_state)(struct pnv_phb *phb, int pe_no);
void (*freeze_pe)(struct pnv_phb *phb, int pe_no);
int (*unfreeze_pe)(struct pnv_phb *phb, int pe_no, int opt);
--
2.1.0
--
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