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Subject[PATCH 4/4] mthca: allow setting "dmaflush" attribute on user-allocated memory

Use the dma_flags_set_dmaflush() interface to allow a "dmaflush"
attribute to be associated with user-allocated memory. (For now,
it's only implemented for mthca.)
Signed-off-by: Arthur Kepner <akepner@sgi.com>
--
drivers/infiniband/core/umem.c | 7 +++++--
drivers/infiniband/hw/amso1100/c2_provider.c | 2 +-
drivers/infiniband/hw/cxgb3/iwch_provider.c | 2 +-
drivers/infiniband/hw/ehca/ehca_mrmw.c | 2 +-
drivers/infiniband/hw/ipath/ipath_mr.c | 2 +-
drivers/infiniband/hw/mlx4/cq.c | 2 +-
drivers/infiniband/hw/mlx4/doorbell.c | 2 +-
drivers/infiniband/hw/mlx4/mr.c | 3 ++-
drivers/infiniband/hw/mlx4/qp.c | 2 +-
drivers/infiniband/hw/mlx4/srq.c | 2 +-
drivers/infiniband/hw/mthca/mthca_provider.c | 7 ++++++-
drivers/infiniband/hw/mthca/mthca_user.h | 10 +++++++++-
include/rdma/ib_umem.h | 4 ++--
13 files changed, 32 insertions(+), 15 deletions(-)
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 664d2fa..e8a3dd4 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -69,9 +69,10 @@ static void __ib_umem_release(struct ib_device *dev, struct ib_umem *umem, int d
* @addr: userspace virtual address to start at
* @size: length of region to pin
* @access: IB_ACCESS_xxx flags for memory being pinned
+ * @dmaflush: set "dmaflush" attribute on this memory, if necessary
*/
struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
- size_t size, int access)
+ size_t size, int access, int dmaflush)
{
struct ib_umem *umem;
struct page **page_list;
@@ -83,6 +84,8 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
int ret;
int off;
int i;
+ int flags = dmaflush ? dma_flags_set_dmaflush(DMA_BIDIRECTIONAL):
+ DMA_BIDIRECTIONAL;

if (!can_do_mlock())
return ERR_PTR(-EPERM);
@@ -160,7 +163,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
chunk->nmap = ib_dma_map_sg(context->device,
&chunk->page_list[0],
chunk->nents,
- DMA_BIDIRECTIONAL);
+ flags);
if (chunk->nmap <= 0) {
for (i = 0; i < chunk->nents; ++i)
put_page(chunk->page_list[i].page);
diff --git a/drivers/infiniband/hw/amso1100/c2_provider.c b/drivers/infiniband/hw/amso1100/c2_provider.c
index 997cf15..17243b7 100644
--- a/drivers/infiniband/hw/amso1100/c2_provider.c
+++ b/drivers/infiniband/hw/amso1100/c2_provider.c
@@ -449,7 +449,7 @@ static struct ib_mr *c2_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
return ERR_PTR(-ENOMEM);
c2mr->pd = c2pd;

- c2mr->umem = ib_umem_get(pd->uobject->context, start, length, acc);
+ c2mr->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0);
if (IS_ERR(c2mr->umem)) {
err = PTR_ERR(c2mr->umem);
kfree(c2mr);
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index f0c7775..d0a514c 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -601,7 +601,7 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
if (!mhp)
return ERR_PTR(-ENOMEM);

- mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc);
+ mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0);
if (IS_ERR(mhp->umem)) {
err = PTR_ERR(mhp->umem);
kfree(mhp);
diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c
index d97eda3..c13c11c 100644
--- a/drivers/infiniband/hw/ehca/ehca_mrmw.c
+++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c
@@ -329,7 +329,7 @@ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
}

e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
- mr_access_flags);
+ mr_access_flags, 0);
if (IS_ERR(e_mr->umem)) {
ib_mr = (void *)e_mr->umem;
goto reg_user_mr_exit1;
diff --git a/drivers/infiniband/hw/ipath/ipath_mr.c b/drivers/infiniband/hw/ipath/ipath_mr.c
index e442470..e351222 100644
--- a/drivers/infiniband/hw/ipath/ipath_mr.c
+++ b/drivers/infiniband/hw/ipath/ipath_mr.c
@@ -195,7 +195,7 @@ struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
goto bail;
}

- umem = ib_umem_get(pd->uobject->context, start, length, mr_access_flags);
+ umem = ib_umem_get(pd->uobject->context, start, length, mr_access_flags, 0);
if (IS_ERR(umem))
return (void *) umem;

diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 8bf44da..96ec149 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -122,7 +122,7 @@ struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector
}

cq->umem = ib_umem_get(context, ucmd.buf_addr, buf_size,
- IB_ACCESS_LOCAL_WRITE);
+ IB_ACCESS_LOCAL_WRITE, 0);
if (IS_ERR(cq->umem)) {
err = PTR_ERR(cq->umem);
goto err_cq;
diff --git a/drivers/infiniband/hw/mlx4/doorbell.c b/drivers/infiniband/hw/mlx4/doorbell.c
index 1c36087..0afde2d 100644
--- a/drivers/infiniband/hw/mlx4/doorbell.c
+++ b/drivers/infiniband/hw/mlx4/doorbell.c
@@ -181,7 +181,7 @@ int mlx4_ib_db_map_user(struct mlx4_ib_ucontext *context, unsigned long virt,
page->user_virt = (virt & PAGE_MASK);
page->refcnt = 0;
page->umem = ib_umem_get(&context->ibucontext, virt & PAGE_MASK,
- PAGE_SIZE, 0);
+ PAGE_SIZE, 0, 0);
if (IS_ERR(page->umem)) {
err = PTR_ERR(page->umem);
kfree(page);
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index 85ae906..3e05eb6 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -133,7 +133,8 @@ struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
if (!mr)
return ERR_PTR(-ENOMEM);

- mr->umem = ib_umem_get(pd->uobject->context, start, length, access_flags);
+ mr->umem = ib_umem_get(pd->uobject->context, start, length,
+ access_flags, 0);
if (IS_ERR(mr->umem)) {
err = PTR_ERR(mr->umem);
goto err_free;
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 85c51bd..f4dd553 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -335,7 +335,7 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
goto err;

qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
- qp->buf_size, 0);
+ qp->buf_size, 0, 0);
if (IS_ERR(qp->umem)) {
err = PTR_ERR(qp->umem);
goto err;
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index 408748f..7c17b89 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -115,7 +115,7 @@ struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
}

srq->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
- buf_size, 0);
+ buf_size, 0, 0);
if (IS_ERR(srq->umem)) {
err = PTR_ERR(srq->umem);
goto err_srq;
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 6bcde1c..c818708 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -1017,17 +1017,22 @@ static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
struct mthca_dev *dev = to_mdev(pd->device);
struct ib_umem_chunk *chunk;
struct mthca_mr *mr;
+ struct mthca_reg_mr ucmd;
u64 *pages;
int shift, n, len;
int i, j, k;
int err = 0;
int write_mtt_size;

+ if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
+ return ERR_PTR(-EFAULT);
+
mr = kmalloc(sizeof *mr, GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);

- mr->umem = ib_umem_get(pd->uobject->context, start, length, acc);
+ mr->umem = ib_umem_get(pd->uobject->context, start, length, acc,
+ ucmd.mr_attrs & MTHCA_MR_DMAFLUSH);
if (IS_ERR(mr->umem)) {
err = PTR_ERR(mr->umem);
goto err;
diff --git a/drivers/infiniband/hw/mthca/mthca_user.h b/drivers/infiniband/hw/mthca/mthca_user.h
index 02cc0a7..5662aea 100644
--- a/drivers/infiniband/hw/mthca/mthca_user.h
+++ b/drivers/infiniband/hw/mthca/mthca_user.h
@@ -41,7 +41,7 @@
* Increment this value if any changes that break userspace ABI
* compatibility are made.
*/
-#define MTHCA_UVERBS_ABI_VERSION 1
+#define MTHCA_UVERBS_ABI_VERSION 2

/*
* Make sure that all structs defined in this file remain laid out so
@@ -61,6 +61,14 @@ struct mthca_alloc_pd_resp {
__u32 reserved;
};

+struct mthca_reg_mr {
+ __u32 mr_attrs;
+#define MTHCA_MR_DMAFLUSH 0x1 /* flush in-flight DMA on a write to
+ * memory region */
+ __u32 reserved;
+};
+
+
struct mthca_create_cq {
__u32 lkey;
__u32 pdn;
diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h
index c533d6c..b7aaeb0 100644
--- a/include/rdma/ib_umem.h
+++ b/include/rdma/ib_umem.h
@@ -61,7 +61,7 @@ struct ib_umem_chunk {
#ifdef CONFIG_INFINIBAND_USER_MEM

struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
- size_t size, int access);
+ size_t size, int access, int dmaflush);
void ib_umem_release(struct ib_umem *umem);
int ib_umem_page_count(struct ib_umem *umem);

@@ -71,7 +71,7 @@ int ib_umem_page_count(struct ib_umem *umem);

static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context,
unsigned long addr, size_t size,
- int access) {
+ int access, int dmaflush) {
return ERR_PTR(-EINVAL);
}
static inline void ib_umem_release(struct ib_umem *umem) { }
-
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