[PATCH 4/9] x86/pci: Rename 'MMCONFIG' to 'ECAM', use pr_fmt

Bjorn Helgaas
2023-11-21T18:37:11Z

The "MMCONFIG" term is not used in PCI/PCIe specs. Replace it with "ECAM",
the term used in PCIe r6.0, sec 7.2.2.

Define pr_fmt() instead of repeating PREFIX in every log message.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/x86/pci/mmconfig-shared.c | 111 ++++++++++++++-------------------
arch/x86/pci/mmconfig_32.c | 2 +-
arch/x86/pci/mmconfig_64.c | 6 +-
3 files changed, 52 insertions(+), 67 deletions(-)

diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index bc1312d920da..896cc11013bd 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * mmconfig-shared.c - Low-level direct PCI config space access via
- * MMCONFIG - common code between i386 and x86-64.
+ * Low-level direct PCI config space access via ECAM - common code between
+ * i386 and x86-64.
*
* This code does:
* - known chipset handling
@@ -11,6 +11,8 @@
* themselves.
*/

+#define pr_fmt(fmt) "PCI: " fmt
+
#include <linux/acpi.h>
#include <linux/efi.h>
#include <linux/pci.h>
@@ -24,9 +26,7 @@
#include <asm/pci_x86.h>
#include <asm/acpi.h>

-#define PREFIX "PCI: "
-
-/* Indicate if the mmcfg resources have been placed into the resource table. */
+/* Indicate if the ECAM resources have been placed into the resource table */
static bool pci_mmcfg_running_state;
static bool pci_mmcfg_arch_init_failed;
static DEFINE_MUTEX(pci_mmcfg_lock);
@@ -90,7 +90,7 @@ static struct pci_mmcfg_region *pci_mmconfig_alloc(int segment, int start,
res->end = addr + PCI_MMCFG_BUS_OFFSET(end + 1) - 1;
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
snprintf(new->name, PCI_MMCFG_RESOURCE_NAME_LEN,
- "PCI MMCONFIG %04x [bus %02x-%02x]", segment, start, end);
+ "PCI ECAM %04x [bus %02x-%02x]", segment, start, end);
res->name = new->name;

return new;
@@ -107,10 +107,8 @@ struct pci_mmcfg_region *__init pci_mmconfig_add(int segment, int start,
list_add_sorted(new);
mutex_unlock(&pci_mmcfg_lock);

- pr_info(PREFIX
- "MMCONFIG for domain %04x [bus %02x-%02x] at %pR "
- "(base %#lx)\n",
- segment, start, end, &new->res, (unsigned long)addr);
+ pr_info("ECAM %pR (base %#lx) for domain %04x [bus %02x-%02x]\n",
+ &new->res, (unsigned long)addr, segment, start, end);
}

return new;
@@ -205,7 +203,7 @@ static const char *__init pci_mmcfg_amd_fam10h(void)
msr <<= 32;
msr |= low;

- /* mmconfig is not enable */
+ /* ECAM is not enabled */
if (!(msr & FAM10H_MMIO_CONF_ENABLE))
return NULL;

@@ -367,7 +365,7 @@ static int __init pci_mmcfg_check_hostbridge(void)
name = pci_mmcfg_probes[i].probe();

if (name)
- pr_info(PREFIX "%s with MMCONFIG support\n", name);
+ pr_info("%s with ECAM support\n", name);
}

/* some end_bus_number is crazy, fix it */
@@ -487,11 +485,10 @@ static bool __ref is_mmconf_reserved(check_reserved_t is_reserved,
return false;

if (dev)
- dev_info(dev, "MMCONFIG at %pR reserved as %s\n",
+ dev_info(dev, "ECAM %pR reserved as %s\n",
&cfg->res, method);
else
- pr_info(PREFIX "MMCONFIG at %pR reserved as %s\n",
- &cfg->res, method);
+ pr_info("ECAM %pR reserved as %s\n", &cfg->res, method);

if (old_size != size) {
/* update end_bus */
@@ -500,20 +497,16 @@ static bool __ref is_mmconf_reserved(check_reserved_t is_reserved,
cfg->res.end = cfg->res.start +
PCI_MMCFG_BUS_OFFSET(num_buses) - 1;
snprintf(cfg->name, PCI_MMCFG_RESOURCE_NAME_LEN,
- "PCI MMCONFIG %04x [bus %02x-%02x]",
+ "PCI ECAM %04x [bus %02x-%02x]",
cfg->segment, cfg->start_bus, cfg->end_bus);

if (dev)
- dev_info(dev,
- "MMCONFIG "
- "at %pR (base %#lx) (size reduced!)\n",
- &cfg->res, (unsigned long) cfg->address);
+ dev_info(dev, "ECAM %pR (base %#lx) (size reduced!)\n",
+ &cfg->res, (unsigned long) cfg->address);
else
- pr_info(PREFIX
- "MMCONFIG for %04x [bus%02x-%02x] "
- "at %pR (base %#lx) (size reduced!)\n",
- cfg->segment, cfg->start_bus, cfg->end_bus,
- &cfg->res, (unsigned long) cfg->address);
+ pr_info("ECAM %pR (base %#lx) for %04x [bus%02x-%02x] (size reduced!)\n",
+ &cfg->res, (unsigned long) cfg->address,
+ cfg->segment, cfg->start_bus, cfg->end_bus);
}

return true;
@@ -530,15 +523,11 @@ pci_mmcfg_check_reserved(struct device *dev, struct pci_mmcfg_region *cfg, int e
return true;

if (dev)
- dev_info(dev, FW_INFO
- "MMCONFIG at %pR not reserved in "
- "ACPI motherboard resources\n",
+ dev_info(dev, FW_INFO "ECAM %pR not reserved in ACPI motherboard resources\n",
&cfg->res);
else
- pr_info(FW_INFO PREFIX
- "MMCONFIG at %pR not reserved in "
- "ACPI motherboard resources\n",
- &cfg->res);
+ pr_info(FW_INFO "ECAM %pR not reserved in ACPI motherboard resources\n",
+ &cfg->res);

if (is_efi_mmio(&cfg->res)) {
pr_info("ECAM %pR is EfiMemoryMappedIO; assuming valid\n",
@@ -546,10 +535,10 @@ pci_mmcfg_check_reserved(struct device *dev, struct pci_mmcfg_region *cfg, int e
conflict = insert_resource_conflict(&iomem_resource,
&cfg->res);
if (conflict)
- pr_warn("MMCONFIG %pR conflicts with %s %pR\n",
+ pr_warn("ECAM %pR conflicts with %s %pR\n",
&cfg->res, conflict->name, conflict);
else
- pr_info("MMCONFIG %pR reserved to work around lack of ACPI motherboard _CRS\n",
+ pr_info("ECAM %pR reserved to work around lack of ACPI motherboard _CRS\n",
&cfg->res);
return true;
}
@@ -579,7 +568,7 @@ static void __init pci_mmcfg_reject_broken(int early)

list_for_each_entry(cfg, &pci_mmcfg_list, list) {
if (pci_mmcfg_check_reserved(NULL, cfg, early) == 0) {
- pr_info(PREFIX "not using MMCONFIG (%pR not reserved)\n",
+ pr_info("not using ECAM (%pR not reserved)\n",
&cfg->res);
free_all_mmcfg();
return;
@@ -599,9 +588,9 @@ static int __init acpi_mcfg_check_entry(struct acpi_table_mcfg *mcfg,
if ((mcfg->header.revision >= 1) && (dmi_get_bios_year() >= 2010))
return 0;

- pr_err(PREFIX "MCFG region for %04x [bus %02x-%02x] at %#llx "
- "is above 4GB, ignored\n", cfg->pci_segment,
- cfg->start_bus_number, cfg->end_bus_number, cfg->address);
+ pr_err("ECAM at %#llx for %04x [bus %02x-%02x] is above 4GB, ignored\n",
+ cfg->address, cfg->pci_segment, cfg->start_bus_number,
+ cfg->end_bus_number);
return -EINVAL;
}

@@ -626,7 +615,7 @@ static int __init pci_parse_mcfg(struct acpi_table_header *header)
i -= sizeof(struct acpi_mcfg_allocation);
}
if (entries == 0) {
- pr_err(PREFIX "MMCONFIG has no entries\n");
+ pr_err("MCFG has no entries\n");
return -ENODEV;
}

@@ -640,7 +629,7 @@ static int __init pci_parse_mcfg(struct acpi_table_header *header)

if (pci_mmconfig_add(cfg->pci_segment, cfg->start_bus_number,
cfg->end_bus_number, cfg->address) == NULL) {
- pr_warn(PREFIX "no memory for MCFG entries\n");
+ pr_warn("no memory for MCFG entries\n");
free_all_mmcfg();
return -ENOMEM;
}
@@ -677,7 +666,7 @@ static int pci_mmcfg_for_each_region(int (*func)(__u64 start, __u64 size,

static void __init __pci_mmcfg_init(int early)
{
- pr_debug(PREFIX "%s(%s)\n", __func__, early ? "early" : "late");
+ pr_debug("%s(%s)\n", __func__, early ? "early" : "late");

pci_mmcfg_reject_broken(early);
if (list_empty(&pci_mmcfg_list))
@@ -705,7 +694,7 @@ static int __initdata known_bridge;

void __init pci_mmcfg_early_init(void)
{
- pr_debug(PREFIX "%s() pci_probe %#x\n", __func__, pci_probe);
+ pr_debug("%s() pci_probe %#x\n", __func__, pci_probe);

if (pci_probe & PCI_PROBE_MMCONF) {
if (pci_mmcfg_check_hostbridge())
@@ -720,16 +709,16 @@ void __init pci_mmcfg_early_init(void)

void __init pci_mmcfg_late_init(void)
{
- pr_debug(PREFIX "%s() pci_probe %#x\n", __func__, pci_probe);
+ pr_debug("%s() pci_probe %#x\n", __func__, pci_probe);

- /* MMCONFIG disabled */
+ /* ECAM disabled */
if ((pci_probe & PCI_PROBE_MMCONF) == 0)
return;

if (known_bridge)
return;

- /* MMCONFIG hasn't been enabled yet, try again */
+ /* ECAM hasn't been enabled yet, try again */
if (pci_probe & PCI_PROBE_MASK & ~PCI_PROBE_MMCONF) {
acpi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg);
__pci_mmcfg_init(0);
@@ -742,9 +731,9 @@ static int __init pci_mmcfg_late_insert_resources(void)

pci_mmcfg_running_state = true;

- pr_debug(PREFIX "%s() pci_probe %#x\n", __func__, pci_probe);
+ pr_debug("%s() pci_probe %#x\n", __func__, pci_probe);

- /* If we are not using MMCONFIG, don't insert the resources. */
+ /* If we are not using ECAM, don't insert the resources. */
if ((pci_probe & PCI_PROBE_MMCONF) == 0)
return 1;

@@ -755,7 +744,7 @@ static int __init pci_mmcfg_late_insert_resources(void)
*/
list_for_each_entry(cfg, &pci_mmcfg_list, list) {
if (!cfg->res.parent) {
- pr_debug(PREFIX "%s() insert %pR\n", __func__, &cfg->res);
+ pr_debug("%s() insert %pR\n", __func__, &cfg->res);
insert_resource(&iomem_resource, &cfg->res);
}
}
@@ -764,13 +753,13 @@ static int __init pci_mmcfg_late_insert_resources(void)
}

/*
- * Perform MMCONFIG resource insertion after PCI initialization to allow for
+ * Perform ECAM resource insertion after PCI initialization to allow for
* misprogrammed MCFG tables that state larger sizes but actually conflict
* with other system resources.
*/
late_initcall(pci_mmcfg_late_insert_resources);

-/* Add MMCFG information for host bridges */
+/* Add ECAM information for host bridges */
int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
phys_addr_t addr)
{
@@ -790,11 +779,9 @@ int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
cfg = pci_mmconfig_lookup(seg, start);
if (cfg) {
if (cfg->end_bus < end)
- dev_info(dev, FW_INFO
- "MMCONFIG for "
- "domain %04x [bus %02x-%02x] "
- "only partially covers this bridge\n",
- cfg->segment, cfg->start_bus, cfg->end_bus);
+ dev_info(dev, FW_INFO "ECAM %pR for domain %04x [bus %02x-%02x] only partially covers this bridge\n",
+ &cfg->res, cfg->segment, cfg->start_bus,
+ cfg->end_bus);
mutex_unlock(&pci_mmcfg_lock);
return -EEXIST;
}
@@ -807,10 +794,10 @@ int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
rc = -EBUSY;
cfg = pci_mmconfig_alloc(seg, start, end, addr);
if (cfg == NULL) {
- dev_warn(dev, "fail to add MMCONFIG (out of memory)\n");
+ dev_warn(dev, "fail to add ECAM (out of memory)\n");
rc = -ENOMEM;
} else if (!pci_mmcfg_check_reserved(dev, cfg, 0)) {
- dev_warn(dev, FW_BUG "MMCONFIG %pR isn't reserved\n",
+ dev_warn(dev, FW_BUG "ECAM %pR isn't reserved\n",
&cfg->res);
} else {
/* Insert resource if it's not in boot stage */
@@ -819,15 +806,13 @@ int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
&cfg->res);

if (tmp) {
- dev_warn(dev,
- "MMCONFIG %pR conflicts with "
- "%s %pR\n",
+ dev_warn(dev, "ECAM %pR conflicts with %s %pR\n",
&cfg->res, tmp->name, tmp);
} else if (pci_mmcfg_arch_map(cfg)) {
- dev_warn(dev, "fail to map MMCONFIG %pR\n", &cfg->res);
+ dev_warn(dev, "fail to map ECAM %pR\n", &cfg->res);
} else {
list_add_sorted(cfg);
- dev_info(dev, "MMCONFIG at %pR (base %#lx)\n",
+ dev_info(dev, "ECAM %pR (base %#lx)\n",
&cfg->res, (unsigned long)addr);
cfg = NULL;
rc = 0;
@@ -845,7 +830,7 @@ int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
return rc;
}

-/* Delete MMCFG information for host bridges */
+/* Delete ECAM information for host bridges */
int pci_mmconfig_delete(u16 seg, u8 start, u8 end)
{
struct pci_mmcfg_region *cfg;
diff --git a/arch/x86/pci/mmconfig_32.c b/arch/x86/pci/mmconfig_32.c
index bfa789875322..f9ef97c593cf 100644
--- a/arch/x86/pci/mmconfig_32.c
+++ b/arch/x86/pci/mmconfig_32.c
@@ -131,7 +131,7 @@ const struct pci_raw_ops pci_mmcfg = {

int __init pci_mmcfg_arch_init(void)
{
- printk(KERN_INFO "PCI: Using MMCONFIG for extended config space\n");
+ printk(KERN_INFO "PCI: Using ECAM for extended config space\n");
raw_pci_ext_ops = &pci_mmcfg;
return 1;
}
diff --git a/arch/x86/pci/mmconfig_64.c b/arch/x86/pci/mmconfig_64.c
index 0c7b6e66c644..dfdeac0a7571 100644
--- a/arch/x86/pci/mmconfig_64.c
+++ b/arch/x86/pci/mmconfig_64.c
@@ -6,6 +6,8 @@
* space mapped. This allows lockless config space operation.
*/

+#define pr_fmt(fmt) "PCI: " fmt
+
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/acpi.h>
@@ -14,8 +16,6 @@
#include <asm/e820/api.h>
#include <asm/pci_x86.h>

-#define PREFIX "PCI: "
-
static char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn)
{
struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus);
@@ -138,7 +138,7 @@ int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg)
{
cfg->virt = mcfg_ioremap(cfg);
if (!cfg->virt) {
- pr_err(PREFIX "can't map MMCONFIG at %pR\n", &cfg->res);
+ pr_err("can't map ECAM at %pR\n", &cfg->res);
return -ENOMEM;
}

--
2.34.1