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Message-ID: <20191103211813.213227-8-jhubbard@nvidia.com>
Date: Sun, 3 Nov 2019 13:18:02 -0800
From: John Hubbard <jhubbard@...dia.com>
To: Andrew Morton <akpm@...ux-foundation.org>
CC: Al Viro <viro@...iv.linux.org.uk>,
Alex Williamson <alex.williamson@...hat.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Björn Töpel <bjorn.topel@...el.com>,
Christoph Hellwig <hch@...radead.org>,
Dan Williams <dan.j.williams@...el.com>,
Daniel Vetter <daniel@...ll.ch>,
Dave Chinner <david@...morbit.com>,
David Airlie <airlied@...ux.ie>,
"David S . Miller" <davem@...emloft.net>,
Ira Weiny <ira.weiny@...el.com>, Jan Kara <jack@...e.cz>,
Jason Gunthorpe <jgg@...pe.ca>, Jens Axboe <axboe@...nel.dk>,
Jonathan Corbet <corbet@....net>,
Jérôme Glisse <jglisse@...hat.com>,
Magnus Karlsson <magnus.karlsson@...el.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Michael Ellerman <mpe@...erman.id.au>,
Michal Hocko <mhocko@...e.com>,
Mike Kravetz <mike.kravetz@...cle.com>,
Paul Mackerras <paulus@...ba.org>,
Shuah Khan <shuah@...nel.org>,
Vlastimil Babka <vbabka@...e.cz>, <bpf@...r.kernel.org>,
<dri-devel@...ts.freedesktop.org>, <kvm@...r.kernel.org>,
<linux-block@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<linux-fsdevel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
<linux-media@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
<linuxppc-dev@...ts.ozlabs.org>, <netdev@...r.kernel.org>,
<linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
John Hubbard <jhubbard@...dia.com>
Subject: [PATCH v2 07/18] infiniband: set FOLL_PIN, FOLL_LONGTERM via pin_longterm_pages*()
Convert infiniband to use the new wrapper calls, and stop
explicitly setting FOLL_LONGTERM at the call sites.
The new pin_longterm_*() calls replace get_user_pages*()
calls, and set both FOLL_LONGTERM and a new FOLL_PIN
flag. The FOLL_PIN flag requires that the caller must
return the pages via put_user_page*() calls, but
infiniband was already doing that as part of an earlier
commit.
Reviewed-by: Ira Weiny <ira.weiny@...el.com>
Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
drivers/infiniband/core/umem.c | 5 ++---
drivers/infiniband/core/umem_odp.c | 10 +++++-----
drivers/infiniband/hw/hfi1/user_pages.c | 4 ++--
drivers/infiniband/hw/mthca/mthca_memfree.c | 3 +--
drivers/infiniband/hw/qib/qib_user_pages.c | 8 ++++----
drivers/infiniband/hw/qib/qib_user_sdma.c | 2 +-
drivers/infiniband/hw/usnic/usnic_uiom.c | 9 ++++-----
drivers/infiniband/sw/siw/siw_mem.c | 5 ++---
8 files changed, 21 insertions(+), 25 deletions(-)
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 24244a2f68cc..c5a78d3e674b 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -272,11 +272,10 @@ struct ib_umem *ib_umem_get(struct ib_udata *udata, unsigned long addr,
while (npages) {
down_read(&mm->mmap_sem);
- ret = get_user_pages(cur_base,
+ ret = pin_longterm_pages(cur_base,
min_t(unsigned long, npages,
PAGE_SIZE / sizeof (struct page *)),
- gup_flags | FOLL_LONGTERM,
- page_list, NULL);
+ gup_flags, page_list, NULL);
if (ret < 0) {
up_read(&mm->mmap_sem);
goto umem_release;
diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c
index 163ff7ba92b7..a38b67b83db5 100644
--- a/drivers/infiniband/core/umem_odp.c
+++ b/drivers/infiniband/core/umem_odp.c
@@ -534,7 +534,7 @@ static int ib_umem_odp_map_dma_single_page(
} else if (umem_odp->page_list[page_index] == page) {
umem_odp->dma_list[page_index] |= access_mask;
} else {
- pr_err("error: got different pages in IB device and from get_user_pages. IB device page: %p, gup page: %p\n",
+ pr_err("error: got different pages in IB device and from pin_longterm_pages. IB device page: %p, gup page: %p\n",
umem_odp->page_list[page_index], page);
/* Better remove the mapping now, to prevent any further
* damage. */
@@ -639,11 +639,11 @@ int ib_umem_odp_map_dma_pages(struct ib_umem_odp *umem_odp, u64 user_virt,
/*
* Note: this might result in redundent page getting. We can
* avoid this by checking dma_list to be 0 before calling
- * get_user_pages. However, this make the code much more
- * complex (and doesn't gain us much performance in most use
- * cases).
+ * pin_longterm_pages. However, this makes the code much
+ * more complex (and doesn't gain us much performance in most
+ * use cases).
*/
- npages = get_user_pages_remote(owning_process, owning_mm,
+ npages = pin_longterm_pages_remote(owning_process, owning_mm,
user_virt, gup_num_pages,
flags, local_page_list, NULL, NULL);
up_read(&owning_mm->mmap_sem);
diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c
index 469acb961fbd..9b55b0a73e29 100644
--- a/drivers/infiniband/hw/hfi1/user_pages.c
+++ b/drivers/infiniband/hw/hfi1/user_pages.c
@@ -104,9 +104,9 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np
bool writable, struct page **pages)
{
int ret;
- unsigned int gup_flags = FOLL_LONGTERM | (writable ? FOLL_WRITE : 0);
+ unsigned int gup_flags = (writable ? FOLL_WRITE : 0);
- ret = get_user_pages_fast(vaddr, npages, gup_flags, pages);
+ ret = pin_longterm_pages_fast(vaddr, npages, gup_flags, pages);
if (ret < 0)
return ret;
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c
index edccfd6e178f..beec7e4b8a96 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -472,8 +472,7 @@ int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
goto out;
}
- ret = get_user_pages_fast(uaddr & PAGE_MASK, 1,
- FOLL_WRITE | FOLL_LONGTERM, pages);
+ ret = pin_longterm_pages_fast(uaddr & PAGE_MASK, 1, FOLL_WRITE, pages);
if (ret < 0)
goto out;
diff --git a/drivers/infiniband/hw/qib/qib_user_pages.c b/drivers/infiniband/hw/qib/qib_user_pages.c
index 6bf764e41891..684a14e14d9b 100644
--- a/drivers/infiniband/hw/qib/qib_user_pages.c
+++ b/drivers/infiniband/hw/qib/qib_user_pages.c
@@ -108,10 +108,10 @@ int qib_get_user_pages(unsigned long start_page, size_t num_pages,
down_read(¤t->mm->mmap_sem);
for (got = 0; got < num_pages; got += ret) {
- ret = get_user_pages(start_page + got * PAGE_SIZE,
- num_pages - got,
- FOLL_LONGTERM | FOLL_WRITE | FOLL_FORCE,
- p + got, NULL);
+ ret = pin_longterm_pages(start_page + got * PAGE_SIZE,
+ num_pages - got,
+ FOLL_WRITE | FOLL_FORCE,
+ p + got, NULL);
if (ret < 0) {
up_read(¤t->mm->mmap_sem);
goto bail_release;
diff --git a/drivers/infiniband/hw/qib/qib_user_sdma.c b/drivers/infiniband/hw/qib/qib_user_sdma.c
index 05190edc2611..fd86a9d19370 100644
--- a/drivers/infiniband/hw/qib/qib_user_sdma.c
+++ b/drivers/infiniband/hw/qib/qib_user_sdma.c
@@ -670,7 +670,7 @@ static int qib_user_sdma_pin_pages(const struct qib_devdata *dd,
else
j = npages;
- ret = get_user_pages_fast(addr, j, FOLL_LONGTERM, pages);
+ ret = pin_longterm_pages_fast(addr, j, 0, pages);
if (ret != j) {
i = 0;
j = ret;
diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c
index 62e6ffa9ad78..6b90ca1c3771 100644
--- a/drivers/infiniband/hw/usnic/usnic_uiom.c
+++ b/drivers/infiniband/hw/usnic/usnic_uiom.c
@@ -141,11 +141,10 @@ static int usnic_uiom_get_pages(unsigned long addr, size_t size, int writable,
ret = 0;
while (npages) {
- ret = get_user_pages(cur_base,
- min_t(unsigned long, npages,
- PAGE_SIZE / sizeof(struct page *)),
- gup_flags | FOLL_LONGTERM,
- page_list, NULL);
+ ret = pin_longterm_pages(cur_base,
+ min_t(unsigned long, npages,
+ PAGE_SIZE / sizeof(struct page *)),
+ gup_flags, page_list, NULL);
if (ret < 0)
goto out;
diff --git a/drivers/infiniband/sw/siw/siw_mem.c b/drivers/infiniband/sw/siw/siw_mem.c
index e99983f07663..20e663d7ada8 100644
--- a/drivers/infiniband/sw/siw/siw_mem.c
+++ b/drivers/infiniband/sw/siw/siw_mem.c
@@ -426,9 +426,8 @@ struct siw_umem *siw_umem_get(u64 start, u64 len, bool writable)
while (nents) {
struct page **plist = &umem->page_chunk[i].plist[got];
- rv = get_user_pages(first_page_va, nents,
- foll_flags | FOLL_LONGTERM,
- plist, NULL);
+ rv = pin_longterm_pages(first_page_va, nents,
+ foll_flags, plist, NULL);
if (rv < 0)
goto out_sem_up;
--
2.23.0
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