Commit 6e1b8bdc authored by Konstantin Taranov's avatar Konstantin Taranov Committed by Leon Romanovsky
Browse files

RDMA/mana_ib: implement get_dma_mr 



Implement allocation of DMA-mapped memory regions.

Signed-off-by: default avatarKonstantin Taranov <kotaranov@microsoft.com>
Link: https://patch.msgid.link/1737394039-28772-3-git-send-email-kotaranov@linux.microsoft.com


Reviewed-by: default avatarShiraz Saleem <shirazsaleem@microsoft.com>
Reviewed-by: default avatarLong Li <longli@microsoft.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 78683c25

drivers/infiniband/hw/mana/device.c

+1 −0
Original line number Diff line number Diff line
@@ -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,

drivers/infiniband/hw/mana/mr.c

+36 −0
Original line number Diff line number Diff line
@@ -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);

include/net/mana/gdma.h

+5 −0
Original line number Diff line number Diff line
@@ -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