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Groups > linux.kernel > #1373869
| From | Yinghai Lu <yinghai@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v11 29/60] PCI: Don't add too much optional size for hotplug bridge MMIO |
| Date | 2016-04-08 02:30 +0200 |
| Message-ID | <rlstd-3DX-29@gated-at.bofh.it> (permalink) |
| References | <rlsjv-3zZ-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Current code will always add 2M for hotplug bridge MMIO even
there is child device under it already.
For example:
40:03.0 --- 43:00.0 --- 44:02.0 -+- 45:00.0
\- 45:00.1
44:02.0 will need 1M as must for 45:00.0 and 45:00.1
When we calculate add_size for 44:02.0, we pass 2M as additional
size for hotplug bridge, total will be 3M.
That is different from code before changes for optional support,
or even current code that treat optional as required directly by
not passing realloc list. We only need 2M as total.
The optional size should be 1M, and total size should be 2M.
This patch change to comparing required+optional with min_sum_size to
get smaller optional size.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/pci/setup-bus.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 12fd6d9..f6b7b8f 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1198,7 +1198,6 @@ out:
* @type2: second match type
* @type3: third match type
* @min_size : the minimum memory window that must to be allocated
- * @add_size : additional optional memory window
* @realloc_head : track the additional memory window on this list
*
* Calculate the size of the bus and minimal alignment which
@@ -1211,10 +1210,11 @@ out:
static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
unsigned long type, unsigned long type2,
unsigned long type3,
- resource_size_t min_size, resource_size_t add_size,
+ resource_size_t min_size,
struct list_head *realloc_head)
{
struct pci_dev *dev;
+ resource_size_t min_sum_size = 0;
resource_size_t min_align = 0, min_add_align = 0;
resource_size_t max_align = 0, max_add_align = 0;
resource_size_t size = 0, size0 = 0, size1 = 0, sum_add_size = 0;
@@ -1226,6 +1226,11 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
if (!b_res)
return -ENOSPC;
+ if (realloc_head) {
+ min_sum_size = min_size;
+ min_size = 0;
+ }
+
list_for_each_entry(dev, &bus->devices, bus_list) {
int i;
@@ -1298,8 +1303,8 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
}
free_align_test_list(&align_test_list);
- if ((sum_add_size - size) < add_size)
- sum_add_size = size + add_size;
+ if (sum_add_size < min_sum_size)
+ sum_add_size = min_sum_size;
if (sum_add_size > size && realloc_head) {
min_add_align = calculate_mem_align(&align_test_add_list,
max_add_align, sum_add_size,
@@ -1436,7 +1441,7 @@ 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 min_mem_size = 0, additional_io_size = 0;
struct resource *b_res;
int ret;
@@ -1473,7 +1478,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
case PCI_CLASS_BRIDGE_PCI:
if (bus->self->is_hotplug_bridge) {
additional_io_size = pci_hotplug_io_size;
- additional_mem_size = pci_hotplug_mem_size;
+ min_mem_size = pci_hotplug_mem_size;
}
/* Fall through */
default:
@@ -1493,8 +1498,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
prefmask |= IORESOURCE_MEM_64;
ret = pbus_size_mem(bus, prefmask, prefmask,
prefmask, prefmask,
- realloc_head ? 0 : additional_mem_size,
- additional_mem_size, realloc_head);
+ min_mem_size, realloc_head);
/*
* If successful, all non-prefetchable resources
@@ -1517,8 +1521,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
prefmask &= ~IORESOURCE_MEM_64;
ret = pbus_size_mem(bus, prefmask, prefmask,
prefmask, prefmask,
- realloc_head ? 0 : additional_mem_size,
- additional_mem_size, realloc_head);
+ min_mem_size, realloc_head);
/*
* If successful, only non-prefetchable resources
@@ -1527,7 +1530,7 @@ 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;
+ min_mem_size += min_mem_size;
type2 = type3 = IORESOURCE_MEM;
}
@@ -1548,8 +1551,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
* window.
*/
pbus_size_mem(bus, mask, IORESOURCE_MEM, type2, type3,
- realloc_head ? 0 : additional_mem_size,
- additional_mem_size, realloc_head);
+ min_mem_size, realloc_head);
break;
}
}
--
1.8.4.5
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[PATCH v11 00/60] PCI: Resource allocation cleanup for v4.7 Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 22/60] PCI: Get new realloc size for bridge for last try Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 42/60] PCI: Skip required+optional if there is no optional Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 25/60] PCI: Reuse res_to_dev_res() in reassign_resources_sorted() Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 29/60] PCI: Don't add too much optional size for hotplug bridge MMIO Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 35/60] PCI: Simplify res reference using in __assign_resources_sorted() Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 32/60] PCI: Rename pdev_sort_resources() to pdev_assign_resources_prepare() Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 34/60] PCI: Add debug printout during releasing partial assigned resources Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 26/60] PCI: Use correct align for optional only resources during sorting Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 38/60] PCI: Check if resource is allocated before trying to assign one Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 31/60] PCI: Remove duplicated code for resource sorting Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 56/60] PCI: Add debug print out for min_align and alt_size Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 12/60] PCI: Check pref compatible bit for mem64 resource of PCIe device Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 58/60] PCI: Introduce resource_disabled() Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 24/60] PCI: Cleanup res_to_dev_res() printout Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 39/60] PCI: Separate out save_resources()/restore_resources() Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 49/60] PCI: Don't add too much io port for hotplug bridge with old size Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 54/60] resources: Make allocate_resource() return best fit resource Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 46/60] PCI: Fix size calculation with old_size on rescan path Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 48/60] PCI: Move ISA io port align out of calculate_iosize() Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 02/60] alpha/PCI: Only check iomem_is_exclusive() for IORESOURCE_MEM, not IORESOURCE_IO Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 41/60] PCI: Separate required+optional assigning to another function Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 33/60] PCI: Treat ROM resource as optional during realloc Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:30 +0200
[PATCH v11 28/60] PCI: Optimize bus align/size calculation for optional during sizing Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 04/60] sparc/PCI: Use correct offset for bus address to resource Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 23/60] PCI: Don't release sibling bridge resources during hotplug Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 05/60] sparc/PCI: Reserve legacy mmio after PCI mmio Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 53/60] PCI: Kill macro checking for bus io port sizing Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 03/60] PCI: Add pci_find_bus_resource() Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 11/60] OF/PCI: Add IORESOURCE_MEM_64 for 64-bit resource Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 06/60] sparc/PCI: Add IORESOURCE_MEM_64 for 64-bit resource in OF parsing Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 08/60] PCI: Kill wrong quirk about M7101 Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 14/60] PCI: Add has_mem64 for struct host_bridge Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 30/60] PCI: Reorder resources list for required/optional resources Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 44/60] PCI: Add alt_size ressource allocation support Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
Re: [PATCH v11 44/60] PCI: Add alt_size ressource allocation support Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-08 03:00 +0200
Re: [PATCH v11 44/60] PCI: Add alt_size ressource allocation support Yinghai Lu <yinghai@kernel.org> - 2016-04-08 08:00 +0200
Re: [PATCH v11 44/60] PCI: Add alt_size ressource allocation support Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-04-08 08:40 +0200
[PATCH v11 13/60] PCI: Only treat non-pref mmio64 as pref if all bridges have MEM_64 Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
[PATCH v11 19/60] PCI: Set resource to FIXED for LSI devices Yinghai Lu <yinghai@kernel.org> - 2016-04-08 02:40 +0200
Re: [PATCH v11 00/60] PCI: Resource allocation cleanup for v4.7 Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-08 03:00 +0200
Re: [PATCH v11 00/60] PCI: Resource allocation cleanup for v4.7 Yinghai Lu <yinghai@kernel.org> - 2016-04-09 07:40 +0200
[PATCH v11 50/60] PCI: Unify calculate_size() for io port and MMIO Yinghai Lu <yinghai@kernel.org> - 2016-04-08 03:20 +0200
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