Displaying 20 results from an estimated 48 matches for "devm_memremap_pag".
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devm_memremap_pages
2019 Jun 17
2
[PATCH 07/25] memremap: validate the pagemap type passed to devm_memremap_pages
...gt; ---
> kernel/memremap.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/kernel/memremap.c b/kernel/memremap.c
> index 6e1970719dc2..6a2dd31a6250 100644
> --- a/kernel/memremap.c
> +++ b/kernel/memremap.c
> @@ -157,6 +157,33 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
> pgprot_t pgprot = PAGE_KERNEL;
> int error, nid, is_ram;
>
> + switch (pgmap->type) {
> + case MEMORY_DEVICE_PRIVATE:
> + if (!IS_ENABLED(CONFIG_DEVICE_PRIVATE)) {
> +...
2019 Jun 26
1
[PATCH 11/25] memremap: lift the devmap_enable manipulation into devm_memremap_pages
...= PFN_DEV;
> pmem->pgmap.ref = &q->q_usage_counter;
> if (is_nd_pfn(dev)) {
> - if (setup_pagemap_fsdax(dev, &pmem->pgmap))
> - return -ENOMEM;
> + pmem->pgmap.type = MEMORY_DEVICE_FS_DAX;
> + pmem->pgmap.ops = &fsdax_pagemap_ops;
> addr = devm_memremap_pages(dev, &pmem->pgmap);
> pfn_sb = nd_pfn->pfn_sb;
> pmem->data_offset = le64_to_cpu(pfn_sb->dataoff);
> @@ -428,8 +413,8 @@ static int pmem_attach_disk(struct device *dev,
> } else if (pmem_should_map_pages(dev)) {
> memcpy(&pmem->pgmap.res, &nsio...
2019 Jun 26
0
[PATCH 11/25] memremap: lift the devmap_enable manipulation into devm_memremap_pages
...device *dev,
pmem->pfn_flags = PFN_DEV;
pmem->pgmap.ref = &q->q_usage_counter;
if (is_nd_pfn(dev)) {
- if (setup_pagemap_fsdax(dev, &pmem->pgmap))
- return -ENOMEM;
+ pmem->pgmap.type = MEMORY_DEVICE_FS_DAX;
+ pmem->pgmap.ops = &fsdax_pagemap_ops;
addr = devm_memremap_pages(dev, &pmem->pgmap);
pfn_sb = nd_pfn->pfn_sb;
pmem->data_offset = le64_to_cpu(pfn_sb->dataoff);
@@ -428,8 +413,8 @@ static int pmem_attach_disk(struct device *dev,
} else if (pmem_should_map_pages(dev)) {
memcpy(&pmem->pgmap.res, &nsio->res, sizeof(pmem->...
2019 Jun 13
1
[PATCH 03/22] mm: remove hmm_devmem_add_resource
On Thu, Jun 13, 2019 at 11:43:06AM +0200, Christoph Hellwig wrote:
> This function has never been used since it was first added to the kernel
> more than a year and a half ago, and if we ever grow a consumer of the
> MEMORY_DEVICE_PUBLIC infrastructure it can easily use devm_memremap_pages
> directly now that we've simplified the API for it.
nit: Have we simplified the interface for devm_memremap_pages() at
this point, or are you talking about later patches in this series.
I checked this and all the called functions are exported symbols, so
there is no blocker for a future...
2019 Jun 26
0
[PATCH 08/25] memremap: validate the pagemap type passed to devm_memremap_pages
.../device.c
+++ b/drivers/dax/device.c
@@ -468,6 +468,7 @@ int dev_dax_probe(struct device *dev)
dev_dax->pgmap.ref = &dev_dax->ref;
dev_dax->pgmap.kill = dev_dax_percpu_kill;
dev_dax->pgmap.cleanup = dev_dax_percpu_exit;
+ dev_dax->pgmap.type = MEMORY_DEVICE_DEVDAX;
addr = devm_memremap_pages(dev, &dev_dax->pgmap);
if (IS_ERR(addr))
return PTR_ERR(addr);
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 995c62c5a48b..0c86f2c5ac9c 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -45,13 +45,21 @@ struct vmem_altmap {
* wakeup is...
2019 Jun 13
0
[PATCH 09/22] memremap: lift the devmap_enable manipulation into devm_memremap_pages
...device *dev,
pmem->pfn_flags = PFN_DEV;
pmem->pgmap.ref = &q->q_usage_counter;
if (is_nd_pfn(dev)) {
- if (setup_pagemap_fsdax(dev, &pmem->pgmap))
- return -ENOMEM;
+ pmem->pgmap.type = MEMORY_DEVICE_FS_DAX;
+ pmem->pgmap.ops = &fsdax_pagemap_ops;
addr = devm_memremap_pages(dev, &pmem->pgmap);
pfn_sb = nd_pfn->pfn_sb;
pmem->data_offset = le64_to_cpu(pfn_sb->dataoff);
@@ -434,8 +419,8 @@ static int pmem_attach_disk(struct device *dev,
} else if (pmem_should_map_pages(dev)) {
memcpy(&pmem->pgmap.res, &nsio->res, sizeof(pmem->...
2019 Jun 17
0
[PATCH 10/25] memremap: lift the devmap_enable manipulation into devm_memremap_pages
...device *dev,
pmem->pfn_flags = PFN_DEV;
pmem->pgmap.ref = &q->q_usage_counter;
if (is_nd_pfn(dev)) {
- if (setup_pagemap_fsdax(dev, &pmem->pgmap))
- return -ENOMEM;
+ pmem->pgmap.type = MEMORY_DEVICE_FS_DAX;
+ pmem->pgmap.ops = &fsdax_pagemap_ops;
addr = devm_memremap_pages(dev, &pmem->pgmap);
pfn_sb = nd_pfn->pfn_sb;
pmem->data_offset = le64_to_cpu(pfn_sb->dataoff);
@@ -436,8 +421,8 @@ static int pmem_attach_disk(struct device *dev,
} else if (pmem_should_map_pages(dev)) {
memcpy(&pmem->pgmap.res, &nsio->res, sizeof(pmem->...
2019 Jun 17
0
[PATCH 07/25] memremap: validate the pagemap type passed to devm_memremap_pages
...y: Christoph Hellwig <hch at lst.de>
---
kernel/memremap.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 6e1970719dc2..6a2dd31a6250 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -157,6 +157,33 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
pgprot_t pgprot = PAGE_KERNEL;
int error, nid, is_ram;
+ switch (pgmap->type) {
+ case MEMORY_DEVICE_PRIVATE:
+ if (!IS_ENABLED(CONFIG_DEVICE_PRIVATE)) {
+ WARN(1, "Device private memory not supported\n");
+ return ERR_PTR(-EI...
2019 Jun 26
0
[PATCH 15/25] memremap: provide an optional internal refcount in struct dev_pagemap
Provide an internal refcounting logic if no ->ref field is provided
in the pagemap passed into devm_memremap_pages so that callers don't
have to reinvent it poorly.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
include/linux/memremap.h | 4 ++
kernel/memremap.c | 64 ++++++++++++++++++++++++-------
tools/testing/nvdimm/test/iomap.c | 58 ++++++++++++++++++++++------...
2019 Jun 26
1
[PATCH 15/25] memremap: provide an optional internal refcount in struct dev_pagemap
On Wed, Jun 26, 2019 at 02:27:14PM +0200, Christoph Hellwig wrote:
> Provide an internal refcounting logic if no ->ref field is provided
> in the pagemap passed into devm_memremap_pages so that callers don't
> have to reinvent it poorly.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
> include/linux/memremap.h | 4 ++
> kernel/memremap.c | 64 ++++++++++++++++++++++++-------
> tools/testing/nvdimm/test/iomap....
2019 Jun 17
0
[PATCH 07/25] memremap: validate the pagemap type passed to devm_memremap_pages
On Mon, Jun 17, 2019 at 12:02:09PM -0700, Dan Williams wrote:
> Need a lead in patch that introduces MEMORY_DEVICE_DEVDAX, otherwise:
Or maybe a MEMORY_DEVICE_DEFAULT = 0 shared by fsdax and p2pdma?
2019 Jun 13
2
[PATCH 09/22] memremap: lift the devmap_enable manipulation into devm_memremap_pages
On Thu, Jun 13, 2019 at 11:43:12AM +0200, Christoph Hellwig wrote:
> Just check if there is a ->page_free operation set and take care of the
> static key enable, as well as the put using device managed resources.
> diff --git a/mm/hmm.c b/mm/hmm.c
> index c76a1b5defda..6dc769feb2e1 100644
> +++ b/mm/hmm.c
> @@ -1378,8 +1378,6 @@ struct hmm_devmem *hmm_devmem_add(const struct
2019 Jun 13
2
dev_pagemap related cleanups
...ray!
>
>> Git tree:
>>
>> git://git.infradead.org/users/hch/misc.git hmm-devmem-cleanup
>
> I just realized this collides with the dev_pagemap release rework in
> Andrew's tree (commit ids below are from next.git and are not stable)
>
> 4422ee8476f0 mm/devm_memremap_pages: fix final page put race
> 771f0714d0dc PCI/P2PDMA: track pgmap references per resource, not globally
> af37085de906 lib/genalloc: introduce chunk owners
> e0047ff8aa77 PCI/P2PDMA: fix the gen_pool_add_virt() failure path
> 0315d47d6ae9 mm/devm_memremap_pages: introduce devm_memunmap_...
2019 Jun 13
0
[PATCH 07/22] memremap: move dev_pagemap callbacks into a separate structure
...(struct device *dev)
{
struct dev_dax *dev_dax = to_dev_dax(dev);
@@ -471,7 +475,7 @@ int dev_dax_probe(struct device *dev)
return rc;
dev_dax->pgmap.ref = &dev_dax->ref;
- dev_dax->pgmap.kill = dev_dax_percpu_kill;
+ dev_dax->pgmap.ops = &dev_dax_pagemap_ops;
addr = devm_memremap_pages(dev, &dev_dax->pgmap);
if (IS_ERR(addr)) {
devm_remove_action(dev, dev_dax_percpu_exit, &dev_dax->ref);
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index d9d845077b8b..4efbf184ea68 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -316,7 +316,7 @@...
2019 Jun 17
0
[PATCH 08/25] memremap: move dev_pagemap callbacks into a separate structure
...to_dev_dax(dev);
@@ -466,8 +470,7 @@ int dev_dax_probe(struct device *dev)
return rc;
dev_dax->pgmap.ref = &dev_dax->ref;
- dev_dax->pgmap.kill = dev_dax_percpu_kill;
- dev_dax->pgmap.cleanup = dev_dax_percpu_exit;
+ dev_dax->pgmap.ops = &dev_dax_pagemap_ops;
addr = devm_memremap_pages(dev, &dev_dax->pgmap);
if (IS_ERR(addr))
return PTR_ERR(addr);
diff --git a/drivers/dax/pmem/core.c b/drivers/dax/pmem/core.c
index f9f51786d556..6eb6dfdf19bf 100644
--- a/drivers/dax/pmem/core.c
+++ b/drivers/dax/pmem/core.c
@@ -16,7 +16,7 @@ struct dev_dax *__dax_pmem_probe(struct d...
2019 Jun 26
41
dev_pagemap related cleanups v3
Hi Dan, Jérôme and Jason,
below is a series that cleans up the dev_pagemap interface so that
it is more easily usable, which removes the need to wrap it in hmm
and thus allowing to kill a lot of code
Note: this series is on top of Linux 5.2-rc5 and has some minor
conflicts with the hmm tree that are easy to resolve.
Diffstat summary:
32 files changed, 361 insertions(+), 1012 deletions(-)
Git
2019 Jun 13
1
dev_pagemap related cleanups
...;>> git://git.infradead.org/users/hch/misc.git hmm-devmem-cleanup
>>>
>>> I just realized this collides with the dev_pagemap release rework in
>>> Andrew's tree (commit ids below are from next.git and are not stable)
>>>
>>> 4422ee8476f0 mm/devm_memremap_pages: fix final page put race
>>> 771f0714d0dc PCI/P2PDMA: track pgmap references per resource, not globally
>>> af37085de906 lib/genalloc: introduce chunk owners
>>> e0047ff8aa77 PCI/P2PDMA: fix the gen_pool_add_virt() failure path
>>> 0315d47d6ae9 mm/devm_memremap...
2019 Jun 17
34
dev_pagemap related cleanups v2
Hi Dan, Jérôme and Jason,
below is a series that cleans up the dev_pagemap interface so that
it is more easily usable, which removes the need to wrap it in hmm
and thus allowing to kill a lot of code
Note: this series is on top of the rdma/hmm branch + the dev_pagemap
releas fix series from Dan that went into 5.2-rc5.
Git tree:
git://git.infradead.org/users/hch/misc.git
2019 Jun 26
0
[PATCH 14/25] memremap: replace the altmap_valid field with a PGMAP_ALTMAP_VALID flag
...art += pmem->data_offset;
} else if (pmem_should_map_pages(dev)) {
memcpy(&pmem->pgmap.res, &nsio->res, sizeof(pmem->pgmap.res));
- pmem->pgmap.altmap_valid = false;
pmem->pgmap.type = MEMORY_DEVICE_FS_DAX;
pmem->pgmap.ops = &fsdax_pagemap_ops;
addr = devm_memremap_pages(dev, &pmem->pgmap);
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 336eca601dad..e25685b878e9 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -88,6 +88,8 @@ struct dev_pagemap_ops {
vm_fault_t (*migrate_to_ram)(struct vm_fault *vmf);
};...
2019 Jun 13
3
dev_pagemap related cleanups
...!
>
> > Git tree:
> >
> > git://git.infradead.org/users/hch/misc.git hmm-devmem-cleanup
>
> I just realized this collides with the dev_pagemap release rework in
> Andrew's tree (commit ids below are from next.git and are not stable)
>
> 4422ee8476f0 mm/devm_memremap_pages: fix final page put race
> 771f0714d0dc PCI/P2PDMA: track pgmap references per resource, not globally
> af37085de906 lib/genalloc: introduce chunk owners
> e0047ff8aa77 PCI/P2PDMA: fix the gen_pool_add_virt() failure path
> 0315d47d6ae9 mm/devm_memremap_pages: introduce devm_memunmap_...