* [PATCH v2 1/1] PCI: Add hp_mmio_size and hp_mmio_pref_size parameters
@ 2019-10-23 12:12 Nicholas Johnson
2019-10-23 13:17 ` mika.westerberg
2019-10-23 14:27 ` Bjorn Helgaas
0 siblings, 2 replies; 3+ messages in thread
From: Nicholas Johnson @ 2019-10-23 12:12 UTC (permalink / raw)
To: linux-kernel; +Cc: linux-pci, bhelgaas, mika.westerberg, corbet, benh, logang
Add kernel parameter pci=hpmmiosize=nn[KMG] to set MMIO bridge window
size for hotplug bridges.
Add kernel parameter pci=hpmmioprefsize=nn[KMG] to set MMIO_PREF bridge
window size for hotplug bridges.
Leave pci=hpmemsize=nn[KMG] unchanged, to prevent disruptions to
existing users. This sets both MMIO and MMIO_PREF to the same size.
The two new parameters conform to the style of pci=hpiosize=nn[KMG].
Signed-off-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
---
.../admin-guide/kernel-parameters.txt | 9 ++++++-
drivers/pci/pci.c | 13 +++++++---
drivers/pci/pci.h | 3 ++-
drivers/pci/setup-bus.c | 24 ++++++++++---------
4 files changed, 33 insertions(+), 16 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index a84a83f88..cfe8c2b67 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3492,8 +3492,15 @@
hpiosize=nn[KMG] The fixed amount of bus space which is
reserved for hotplug bridge's IO window.
Default size is 256 bytes.
+ hpmmiosize=nn[KMG] The fixed amount of bus space which is
+ reserved for hotplug bridge's MMIO window.
+ Default size is 2 megabytes.
+ hpmmioprefsize=nn[KMG] The fixed amount of bus space which is
+ reserved for hotplug bridge's MMIO_PREF window.
+ Default size is 2 megabytes.
hpmemsize=nn[KMG] The fixed amount of bus space which is
- reserved for hotplug bridge's memory window.
+ reserved for hotplug bridge's MMIO and
+ MMIO_PREF window.
Default size is 2 megabytes.
hpbussize=nn The minimum amount of additional bus numbers
reserved for buses below a hotplug bridge.
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index a97e2571a..e0406c663 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -85,10 +85,12 @@ unsigned long pci_cardbus_io_size = DEFAULT_CARDBUS_IO_SIZE;
unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE;
#define DEFAULT_HOTPLUG_IO_SIZE (256)
-#define DEFAULT_HOTPLUG_MEM_SIZE (2*1024*1024)
+#define DEFAULT_HOTPLUG_MMIO_SIZE (2*1024*1024)
+#define DEFAULT_HOTPLUG_MMIO_PREF_SIZE (2*1024*1024)
/* pci=hpmemsize=nnM,hpiosize=nn can override this */
unsigned long pci_hotplug_io_size = DEFAULT_HOTPLUG_IO_SIZE;
-unsigned long pci_hotplug_mem_size = DEFAULT_HOTPLUG_MEM_SIZE;
+unsigned long pci_hotplug_mmio_size = DEFAULT_HOTPLUG_MMIO_SIZE;
+unsigned long pci_hotplug_mmio_pref_size = DEFAULT_HOTPLUG_MMIO_PREF_SIZE;
#define DEFAULT_HOTPLUG_BUS_SIZE 1
unsigned long pci_hotplug_bus_size = DEFAULT_HOTPLUG_BUS_SIZE;
@@ -6286,8 +6288,13 @@ static int __init pci_setup(char *str)
pcie_ecrc_get_policy(str + 5);
} else if (!strncmp(str, "hpiosize=", 9)) {
pci_hotplug_io_size = memparse(str + 9, &str);
+ } else if (!strncmp(str, "hpmmiosize=", 11)) {
+ pci_hotplug_mmio_size = memparse(str + 11, &str);
+ } else if (!strncmp(str, "hpmmioprefsize=", 15)) {
+ pci_hotplug_mmio_pref_size = memparse(str + 15, &str);
} else if (!strncmp(str, "hpmemsize=", 10)) {
- pci_hotplug_mem_size = memparse(str + 10, &str);
+ pci_hotplug_mmio_size = memparse(str + 10, &str);
+ pci_hotplug_mmio_pref_size = pci_hotplug_mmio_size;
} else if (!strncmp(str, "hpbussize=", 10)) {
pci_hotplug_bus_size =
simple_strtoul(str + 10, &str, 0);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 3f6947ee3..9faa55a15 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -218,7 +218,8 @@ extern const struct device_type pci_dev_type;
extern const struct attribute_group *pci_bus_groups[];
extern unsigned long pci_hotplug_io_size;
-extern unsigned long pci_hotplug_mem_size;
+extern unsigned long pci_hotplug_mmio_size;
+extern unsigned long pci_hotplug_mmio_pref_size;
extern unsigned long pci_hotplug_bus_size;
/**
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index e7dbe2170..93fd2070a 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1178,7 +1178,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
{
struct pci_dev *dev;
unsigned long mask, prefmask, type2 = 0, type3 = 0;
- resource_size_t additional_mem_size = 0, additional_io_size = 0;
+ resource_size_t additional_io_size = 0, additional_mmio_size = 0,
+ additional_mmio_pref_size = 0;
struct resource *b_res;
int ret;
@@ -1212,7 +1213,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
pci_bridge_check_ranges(bus);
if (bus->self->is_hotplug_bridge) {
additional_io_size = pci_hotplug_io_size;
- additional_mem_size = pci_hotplug_mem_size;
+ additional_mmio_size = pci_hotplug_mmio_size;
+ additional_mmio_pref_size = pci_hotplug_mmio_pref_size;
}
/* Fall through */
default:
@@ -1230,9 +1232,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
if (b_res[2].flags & IORESOURCE_MEM_64) {
prefmask |= IORESOURCE_MEM_64;
ret = pbus_size_mem(bus, prefmask, prefmask,
- prefmask, prefmask,
- realloc_head ? 0 : additional_mem_size,
- additional_mem_size, realloc_head);
+ prefmask, prefmask,
+ realloc_head ? 0 : additional_mmio_pref_size,
+ additional_mmio_pref_size, realloc_head);
/*
* If successful, all non-prefetchable resources
@@ -1254,9 +1256,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
if (!type2) {
prefmask &= ~IORESOURCE_MEM_64;
ret = pbus_size_mem(bus, prefmask, prefmask,
- prefmask, prefmask,
- realloc_head ? 0 : additional_mem_size,
- additional_mem_size, realloc_head);
+ prefmask, prefmask,
+ realloc_head ? 0 : additional_mmio_pref_size,
+ additional_mmio_pref_size, realloc_head);
/*
* If successful, only non-prefetchable resources
@@ -1265,7 +1267,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
if (ret == 0)
mask = prefmask;
else
- additional_mem_size += additional_mem_size;
+ additional_mmio_size += additional_mmio_pref_size;
type2 = type3 = IORESOURCE_MEM;
}
@@ -1285,8 +1287,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
* prefetchable resource in a 64-bit prefetchable window.
*/
pbus_size_mem(bus, mask, IORESOURCE_MEM, type2, type3,
- realloc_head ? 0 : additional_mem_size,
- additional_mem_size, realloc_head);
+ realloc_head ? 0 : additional_mmio_size,
+ additional_mmio_size, realloc_head);
break;
}
}
--
2.23.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2 1/1] PCI: Add hp_mmio_size and hp_mmio_pref_size parameters
2019-10-23 12:12 [PATCH v2 1/1] PCI: Add hp_mmio_size and hp_mmio_pref_size parameters Nicholas Johnson
@ 2019-10-23 13:17 ` mika.westerberg
2019-10-23 14:27 ` Bjorn Helgaas
1 sibling, 0 replies; 3+ messages in thread
From: mika.westerberg @ 2019-10-23 13:17 UTC (permalink / raw)
To: Nicholas Johnson; +Cc: linux-kernel, linux-pci, bhelgaas, corbet, benh, logang
On Wed, Oct 23, 2019 at 12:12:29PM +0000, Nicholas Johnson wrote:
> Add kernel parameter pci=hpmmiosize=nn[KMG] to set MMIO bridge window
> size for hotplug bridges.
>
> Add kernel parameter pci=hpmmioprefsize=nn[KMG] to set MMIO_PREF bridge
> window size for hotplug bridges.
>
> Leave pci=hpmemsize=nn[KMG] unchanged, to prevent disruptions to
> existing users. This sets both MMIO and MMIO_PREF to the same size.
>
> The two new parameters conform to the style of pci=hpiosize=nn[KMG].
>
> Signed-off-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2 1/1] PCI: Add hp_mmio_size and hp_mmio_pref_size parameters
2019-10-23 12:12 [PATCH v2 1/1] PCI: Add hp_mmio_size and hp_mmio_pref_size parameters Nicholas Johnson
2019-10-23 13:17 ` mika.westerberg
@ 2019-10-23 14:27 ` Bjorn Helgaas
1 sibling, 0 replies; 3+ messages in thread
From: Bjorn Helgaas @ 2019-10-23 14:27 UTC (permalink / raw)
To: Nicholas Johnson
Cc: linux-kernel, linux-pci, mika.westerberg, corbet, benh, logang
On Wed, Oct 23, 2019 at 12:12:29PM +0000, Nicholas Johnson wrote:
> Add kernel parameter pci=hpmmiosize=nn[KMG] to set MMIO bridge window
> size for hotplug bridges.
>
> Add kernel parameter pci=hpmmioprefsize=nn[KMG] to set MMIO_PREF bridge
> window size for hotplug bridges.
>
> Leave pci=hpmemsize=nn[KMG] unchanged, to prevent disruptions to
> existing users. This sets both MMIO and MMIO_PREF to the same size.
>
> The two new parameters conform to the style of pci=hpiosize=nn[KMG].
>
> Signed-off-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
Applied to pci/resource for v5.5, thanks!
> ---
> .../admin-guide/kernel-parameters.txt | 9 ++++++-
> drivers/pci/pci.c | 13 +++++++---
> drivers/pci/pci.h | 3 ++-
> drivers/pci/setup-bus.c | 24 ++++++++++---------
> 4 files changed, 33 insertions(+), 16 deletions(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index a84a83f88..cfe8c2b67 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -3492,8 +3492,15 @@
> hpiosize=nn[KMG] The fixed amount of bus space which is
> reserved for hotplug bridge's IO window.
> Default size is 256 bytes.
> + hpmmiosize=nn[KMG] The fixed amount of bus space which is
> + reserved for hotplug bridge's MMIO window.
> + Default size is 2 megabytes.
> + hpmmioprefsize=nn[KMG] The fixed amount of bus space which is
> + reserved for hotplug bridge's MMIO_PREF window.
> + Default size is 2 megabytes.
> hpmemsize=nn[KMG] The fixed amount of bus space which is
> - reserved for hotplug bridge's memory window.
> + reserved for hotplug bridge's MMIO and
> + MMIO_PREF window.
> Default size is 2 megabytes.
> hpbussize=nn The minimum amount of additional bus numbers
> reserved for buses below a hotplug bridge.
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> index a97e2571a..e0406c663 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -85,10 +85,12 @@ unsigned long pci_cardbus_io_size = DEFAULT_CARDBUS_IO_SIZE;
> unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE;
>
> #define DEFAULT_HOTPLUG_IO_SIZE (256)
> -#define DEFAULT_HOTPLUG_MEM_SIZE (2*1024*1024)
> +#define DEFAULT_HOTPLUG_MMIO_SIZE (2*1024*1024)
> +#define DEFAULT_HOTPLUG_MMIO_PREF_SIZE (2*1024*1024)
> /* pci=hpmemsize=nnM,hpiosize=nn can override this */
> unsigned long pci_hotplug_io_size = DEFAULT_HOTPLUG_IO_SIZE;
> -unsigned long pci_hotplug_mem_size = DEFAULT_HOTPLUG_MEM_SIZE;
> +unsigned long pci_hotplug_mmio_size = DEFAULT_HOTPLUG_MMIO_SIZE;
> +unsigned long pci_hotplug_mmio_pref_size = DEFAULT_HOTPLUG_MMIO_PREF_SIZE;
>
> #define DEFAULT_HOTPLUG_BUS_SIZE 1
> unsigned long pci_hotplug_bus_size = DEFAULT_HOTPLUG_BUS_SIZE;
> @@ -6286,8 +6288,13 @@ static int __init pci_setup(char *str)
> pcie_ecrc_get_policy(str + 5);
> } else if (!strncmp(str, "hpiosize=", 9)) {
> pci_hotplug_io_size = memparse(str + 9, &str);
> + } else if (!strncmp(str, "hpmmiosize=", 11)) {
> + pci_hotplug_mmio_size = memparse(str + 11, &str);
> + } else if (!strncmp(str, "hpmmioprefsize=", 15)) {
> + pci_hotplug_mmio_pref_size = memparse(str + 15, &str);
> } else if (!strncmp(str, "hpmemsize=", 10)) {
> - pci_hotplug_mem_size = memparse(str + 10, &str);
> + pci_hotplug_mmio_size = memparse(str + 10, &str);
> + pci_hotplug_mmio_pref_size = pci_hotplug_mmio_size;
> } else if (!strncmp(str, "hpbussize=", 10)) {
> pci_hotplug_bus_size =
> simple_strtoul(str + 10, &str, 0);
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 3f6947ee3..9faa55a15 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -218,7 +218,8 @@ extern const struct device_type pci_dev_type;
> extern const struct attribute_group *pci_bus_groups[];
>
> extern unsigned long pci_hotplug_io_size;
> -extern unsigned long pci_hotplug_mem_size;
> +extern unsigned long pci_hotplug_mmio_size;
> +extern unsigned long pci_hotplug_mmio_pref_size;
> extern unsigned long pci_hotplug_bus_size;
>
> /**
> diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
> index e7dbe2170..93fd2070a 100644
> --- a/drivers/pci/setup-bus.c
> +++ b/drivers/pci/setup-bus.c
> @@ -1178,7 +1178,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
> {
> struct pci_dev *dev;
> unsigned long mask, prefmask, type2 = 0, type3 = 0;
> - resource_size_t additional_mem_size = 0, additional_io_size = 0;
> + resource_size_t additional_io_size = 0, additional_mmio_size = 0,
> + additional_mmio_pref_size = 0;
> struct resource *b_res;
> int ret;
>
> @@ -1212,7 +1213,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
> pci_bridge_check_ranges(bus);
> if (bus->self->is_hotplug_bridge) {
> additional_io_size = pci_hotplug_io_size;
> - additional_mem_size = pci_hotplug_mem_size;
> + additional_mmio_size = pci_hotplug_mmio_size;
> + additional_mmio_pref_size = pci_hotplug_mmio_pref_size;
> }
> /* Fall through */
> default:
> @@ -1230,9 +1232,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
> if (b_res[2].flags & IORESOURCE_MEM_64) {
> prefmask |= IORESOURCE_MEM_64;
> ret = pbus_size_mem(bus, prefmask, prefmask,
> - prefmask, prefmask,
> - realloc_head ? 0 : additional_mem_size,
> - additional_mem_size, realloc_head);
> + prefmask, prefmask,
> + realloc_head ? 0 : additional_mmio_pref_size,
> + additional_mmio_pref_size, realloc_head);
>
> /*
> * If successful, all non-prefetchable resources
> @@ -1254,9 +1256,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
> if (!type2) {
> prefmask &= ~IORESOURCE_MEM_64;
> ret = pbus_size_mem(bus, prefmask, prefmask,
> - prefmask, prefmask,
> - realloc_head ? 0 : additional_mem_size,
> - additional_mem_size, realloc_head);
> + prefmask, prefmask,
> + realloc_head ? 0 : additional_mmio_pref_size,
> + additional_mmio_pref_size, realloc_head);
>
> /*
> * If successful, only non-prefetchable resources
> @@ -1265,7 +1267,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
> if (ret == 0)
> mask = prefmask;
> else
> - additional_mem_size += additional_mem_size;
> + additional_mmio_size += additional_mmio_pref_size;
>
> type2 = type3 = IORESOURCE_MEM;
> }
> @@ -1285,8 +1287,8 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
> * prefetchable resource in a 64-bit prefetchable window.
> */
> pbus_size_mem(bus, mask, IORESOURCE_MEM, type2, type3,
> - realloc_head ? 0 : additional_mem_size,
> - additional_mem_size, realloc_head);
> + realloc_head ? 0 : additional_mmio_size,
> + additional_mmio_size, realloc_head);
> break;
> }
> }
> --
> 2.23.0
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2019-10-23 12:12 [PATCH v2 1/1] PCI: Add hp_mmio_size and hp_mmio_pref_size parameters Nicholas Johnson
2019-10-23 13:17 ` mika.westerberg
2019-10-23 14:27 ` Bjorn Helgaas
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