This patch encapsulate pci_mmcfg_config[] updates. All alloc/free is now
done in pci_mmconfig_add() and free_all_mcfg(), so all updates to
pci_mmcfg_config[] and pci_mmcfg_config_num are in those two functions.
This replaces the previous sequence of extend_mmcfg(), fill_one_mmcfg()
with the single pci_mmconfig_add() interface. This interface is currently
static but will eventually be used in the host bridge hot-add path.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
---
arch/x86/pci/mmconfig-shared.c | 85 ++++++++++++++++++----------------------
1 files changed, 39 insertions(+), 46 deletions(-)
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 7a7b6ba..62a8ecd 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -26,14 +26,24 @@
/* Indicate if the mmcfg resources have been placed into the resource table. */
static int __initdata pci_mmcfg_resources_inserted;
-static __init int extend_mmcfg(int num)
+static __init void free_all_mmcfg(void)
+{
+ pci_mmcfg_arch_free();
+ pci_mmcfg_config_num = 0;
+ kfree(pci_mmcfg_config);
+ pci_mmcfg_config = NULL;
+}
+
+static __init struct acpi_mcfg_allocation *pci_mmconfig_add(int segment,
+ int start, int end, u64 addr)
{
struct acpi_mcfg_allocation *new;
- int new_num = pci_mmcfg_config_num + num;
+ int new_num = pci_mmcfg_config_num + 1;
+ int i = pci_mmcfg_config_num;
new = kzalloc(sizeof(pci_mmcfg_config[0]) * new_num, GFP_KERNEL);
if (!new)
- return -1;
+ return NULL;
if (pci_mmcfg_config) {
memcpy(new, pci_mmcfg_config,
@@ -42,18 +52,13 @@ static __init int extend_mmcfg(int num)
}
pci_mmcfg_config = new;
- return 0;
-}
-
-static __init void fill_one_mmcfg(u64 addr, int segment, int start, int end)
-{
- int i = pci_mmcfg_config_num;
-
pci_mmcfg_config_num++;
pci_mmcfg_config[i].address = addr;
pci_mmcfg_config[i].pci_segment = segment;
pci_mmcfg_config[i].start_bus_number = start;
pci_mmcfg_config[i].end_bus_number = end;
+
+ return &pci_mmcfg_config[i];
}
static const char __init *pci_mmcfg_e7520(void)
@@ -65,11 +70,9 @@ static const char __init *pci_mmcfg_e7520(void)
if (win == 0x0000 || win == 0xf000)
return NULL;
- if (extend_mmcfg(1) == -1)
+ if (pci_mmconfig_add(0, 0, 255, win << 16) == NULL)
return NULL;
- fill_one_mmcfg(win << 16, 0, 0, 255);
-
return "Intel Corporation E7520 Memory Controller Hub";
}
@@ -111,11 +114,9 @@ static const char __init *pci_mmcfg_intel_945(void)
if ((pciexbar & mask) >= 0xf0000000U)
return NULL;
- if (extend_mmcfg(1) == -1)
+ if (pci_mmconfig_add(0, 0, (len >> 20) - 1, pciexbar & mask) == NULL)
return NULL;
- fill_one_mmcfg(pciexbar & mask, 0, 0, (len >> 20) - 1);
-
return "Intel Corporation 945G/GZ/P/PL Express Memory Controller Hub";
}
@@ -124,7 +125,7 @@ static const char __init *pci_mmcfg_amd_fam10h(void)
u32 low, high, address;
u64 base, msr;
int i;
- unsigned segnbits = 0, busnbits;
+ unsigned segnbits = 0, busnbits, end_bus;
if (!(pci_probe & PCI_CHECK_ENABLE_AMD_MMCONF))
return NULL;
@@ -158,11 +159,13 @@ static const char __init *pci_mmcfg_amd_fam10h(void)
busnbits = 8;
}
- if (extend_mmcfg(1 << segnbits) == -1)
- return NULL;
-
+ end_bus = (1 << busnbits) - 1;
for (i = 0; i < (1 << segnbits); i++)
- fill_one_mmcfg(base + (1<<28) * i, i, 0, (1 << busnbits) - 1);
+ if (pci_mmconfig_add(i, 0, end_bus,
+ base + (1<<28) * i) == NULL) {
+ free_all_mmcfg();
+ return NULL;
+ }
return "AMD Family 10h NB";
}
@@ -210,16 +213,14 @@ static const char __init *pci_mmcfg_nvidia_mcp55(void)
if (!(extcfg & extcfg_enable_mask))
continue;
- if (extend_mmcfg(1) == -1)
- continue;
-
size_index = (extcfg & extcfg_size_mask) >> extcfg_size_shift;
base = extcfg & extcfg_base_mask[size_index];
/* base could > 4G */
base <<= extcfg_base_lshift;
start = (extcfg & extcfg_start_mask) >> extcfg_start_shift;
end = start + extcfg_sizebus[size_index] - 1;
- fill_one_mmcfg(base, 0, start, end);
+ if (pci_mmconfig_add(0, start, end, base) == NULL)
+ continue;
mcp55_mmconf_found++;
}
@@ -303,8 +304,7 @@ static int __init pci_mmcfg_check_hostbridge(void)
if (!raw_pci_ops)
return 0;
- pci_mmcfg_config_num = 0;
- pci_mmcfg_config = NULL;
+ free_all_mmcfg();
for (i = 0; i < ARRAY_SIZE(pci_mmcfg_probes); i++) {
bus = pci_mmcfg_probes[i].bus;
@@ -516,10 +516,7 @@ static void __init pci_mmcfg_reject_broken(int early)
reject:
printk(KERN_INFO "PCI: Not using MMCONFIG.\n");
- pci_mmcfg_arch_free();
- kfree(pci_mmcfg_config);
- pci_mmcfg_config = NULL;
- pci_mmcfg_config_num = 0;
+ free_all_mmcfg();
}
static int __initdata known_bridge;
@@ -556,7 +553,7 @@ static int __init pci_parse_mcfg(struct acpi_table_header *header)
struct acpi_table_mcfg *mcfg;
struct acpi_mcfg_allocation *cfg_table, *cfg;
unsigned long i;
- int entries, config_size;
+ int entries;
if (!header)
return -EINVAL;
@@ -564,7 +561,7 @@ static int __init pci_parse_mcfg(struct acpi_table_header *header)
mcfg = (struct acpi_table_mcfg *)header;
/* how many config structures do we have */
- pci_mmcfg_config_num = 0;
+ free_all_mmcfg();
entries = 0;
i = header->length - sizeof(struct acpi_table_mcfg);
while (i >= sizeof(struct acpi_mcfg_allocation)) {
@@ -576,25 +573,21 @@ static int __init pci_parse_mcfg(struct acpi_table_header *header)
return -ENODEV;
}
- config_size = entries * sizeof(*pci_mmcfg_config);
- pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
- if (!pci_mmcfg_config) {
- printk(KERN_WARNING PREFIX
- "No memory for MCFG config tables\n");
- return -ENOMEM;
- }
-
- memcpy(pci_mmcfg_config, &mcfg[1], config_size);
- pci_mmcfg_config_num = entries;
-
cfg_table = (struct acpi_mcfg_allocation *) &mcfg[1];
for (i = 0; i < entries; i++) {
cfg = &cfg_table[i];
if (acpi_mcfg_check_entry(mcfg, cfg)) {
- kfree(pci_mmcfg_config);
- pci_mmcfg_config_num = 0;
+ free_all_mmcfg();
return -ENODEV;
}
+
+ if (pci_mmconfig_add(cfg->pci_segment, cfg->start_bus_number,
+ cfg->end_bus_number, cfg->address) == NULL) {
+ printk(KERN_WARNING PREFIX
+ "no memory for MCFG entries\n");
+ free_all_mmcfg();
+ return -ENOMEM;
+ }
}
return 0;
--
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