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RDMA/mana_ib: implement get_dma_mr

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Implement allocation of DMA-mapped memory regions.

Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
Link: https://patch.msgid.link/1737394039-28772-3-git-send-email-kotaranov@linux.microsoft.com
Reviewed-by: Shiraz Saleem <shirazsaleem@microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Konstantin Taranov 2025-01-20 09:27:08 -08:00 committed by Leon Romanovsky
parent 78683c25c8
commit 6e1b8bdcd0
3 changed files with 42 additions and 0 deletions
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1
drivers/infiniband/hw/mana/device.c
View File

@ -32,6 +32,7 @@ static const struct ib_device_ops mana_ib_dev_ops = {
.destroy_rwq_ind_table = mana_ib_destroy_rwq_ind_table,
.destroy_wq = mana_ib_destroy_wq,
.disassociate_ucontext = mana_ib_disassociate_ucontext,
.get_dma_mr = mana_ib_get_dma_mr,
.get_link_layer = mana_ib_get_link_layer,
.get_port_immutable = mana_ib_get_port_immutable,
.mmap = mana_ib_mmap,

36
drivers/infiniband/hw/mana/mr.c
View File

@ -8,6 +8,8 @@
#define VALID_MR_FLAGS \
(IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ)
#define VALID_DMA_MR_FLAGS (IB_ACCESS_LOCAL_WRITE)
static enum gdma_mr_access_flags
mana_ib_verbs_to_gdma_access_flags(int access_flags)
{
@ -39,6 +41,8 @@ static int mana_ib_gd_create_mr(struct mana_ib_dev *dev, struct mana_ib_mr *mr,
req.mr_type = mr_params->mr_type;
switch (mr_params->mr_type) {
case GDMA_MR_TYPE_GPA:
break;
case GDMA_MR_TYPE_GVA:
req.gva.dma_region_handle = mr_params->gva.dma_region_handle;
req.gva.virtual_address = mr_params->gva.virtual_address;
@ -169,6 +173,38 @@ struct ib_mr *mana_ib_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 length,
return ERR_PTR(err);
}
struct ib_mr *mana_ib_get_dma_mr(struct ib_pd *ibpd, int access_flags)
{
struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd);
struct gdma_create_mr_params mr_params = {};
struct ib_device *ibdev = ibpd->device;
struct mana_ib_dev *dev;
struct mana_ib_mr *mr;
int err;
dev = container_of(ibdev, struct mana_ib_dev, ib_dev);
if (access_flags & ~VALID_DMA_MR_FLAGS)
return ERR_PTR(-EINVAL);
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
mr_params.pd_handle = pd->pd_handle;
mr_params.mr_type = GDMA_MR_TYPE_GPA;
err = mana_ib_gd_create_mr(dev, mr, &mr_params);
if (err)
goto err_free;
return &mr->ibmr;
err_free:
kfree(mr);
return ERR_PTR(err);
}
int mana_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
{
struct mana_ib_mr *mr = container_of(ibmr, struct mana_ib_mr, ibmr);

5
include/net/mana/gdma.h
View File

@ -801,6 +801,11 @@ struct gdma_destory_pd_resp {
};/* HW DATA */
enum gdma_mr_type {
/*
* Guest Physical Address - MRs of this type allow access
* to any DMA-mapped memory using bus-logical address
*/
GDMA_MR_TYPE_GPA = 1,
/* Guest Virtual Address - MRs of this type allow access
* to memory mapped by PTEs associated with this MR using a virtual
* address that is set up in the MST