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Commit add08d76 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Doug Ledford
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IB/mlx5: Convert UMR CQ to new CQ API 



Simplifies the code, and makes it more fair vs other users by using a
softirq for polling.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarHaggai Eran <haggaie@mellanox.com>
Reviewed-by: default avatarSagi Grimberg <sagig@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent d2370e0a

drivers/infiniband/hw/mlx5/main.c

+3 −7
Original line number Diff line number Diff line
@@ -1861,7 +1861,7 @@ static void destroy_umrc_res(struct mlx5_ib_dev *dev) 
		mlx5_ib_warn(dev, "mr cache cleanup failed\n");



	mlx5_ib_destroy_qp(dev->umrc.qp);

	ib_destroy_cq(dev->umrc.cq);

	ib_free_cq(dev->umrc.cq);

	ib_dealloc_pd(dev->umrc.pd);

}
@@ -1876,7 +1876,6 @@ static int create_umr_res(struct mlx5_ib_dev *dev) 
	struct ib_pd *pd;

	struct ib_cq *cq;

	struct ib_qp *qp;

	struct ib_cq_init_attr cq_attr = {};

	int ret;



	attr = kzalloc(sizeof(*attr), GFP_KERNEL);
@@ -1893,15 +1892,12 @@ static int create_umr_res(struct mlx5_ib_dev *dev) 
		goto error_0;

	}



	cq_attr.cqe = 128;

	cq = ib_create_cq(&dev->ib_dev, mlx5_umr_cq_handler, NULL, NULL,

			  &cq_attr);

	cq = ib_alloc_cq(&dev->ib_dev, NULL, 128, 0, IB_POLL_SOFTIRQ);

	if (IS_ERR(cq)) {

		mlx5_ib_dbg(dev, "Couldn't create CQ for sync UMR QP\n");

		ret = PTR_ERR(cq);

		goto error_2;

	}

	ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);



	init_attr->send_cq = cq;

	init_attr->recv_cq = cq;
@@ -1968,7 +1964,7 @@ static int create_umr_res(struct mlx5_ib_dev *dev) 
	mlx5_ib_destroy_qp(qp);



error_3:

	ib_destroy_cq(cq);

	ib_free_cq(cq);



error_2:

	ib_dealloc_pd(pd);

drivers/infiniband/hw/mlx5/mlx5_ib.h

+1 −7
Original line number Diff line number Diff line
@@ -468,16 +468,11 @@ struct mlx5_ib_mw { 
};



struct mlx5_ib_umr_context {

	struct ib_cqe		cqe;

	enum ib_wc_status	status;

	struct completion	done;

};



static inline void mlx5_ib_init_umr_context(struct mlx5_ib_umr_context *context)

{

	context->status = -1;

	init_completion(&context->done);

}



struct umr_common {

	struct ib_pd	*pd;

	struct ib_cq	*cq;
@@ -762,7 +757,6 @@ int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq); 
int mlx5_mr_cache_init(struct mlx5_ib_dev *dev);

int mlx5_mr_cache_cleanup(struct mlx5_ib_dev *dev);

int mlx5_mr_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift);

void mlx5_umr_cq_handler(struct ib_cq *cq, void *cq_context);

int mlx5_ib_check_mr_status(struct ib_mr *ibmr, u32 check_mask,

			    struct ib_mr_status *mr_status);

drivers/infiniband/hw/mlx5/mr.c

+23 −26
Original line number Diff line number Diff line
@@ -836,26 +836,20 @@ static struct ib_umem *mr_umem_get(struct ib_pd *pd, u64 start, u64 length, 
	return umem;

}



void mlx5_umr_cq_handler(struct ib_cq *cq, void *cq_context)

static void mlx5_ib_umr_done(struct ib_cq *cq, struct ib_wc *wc)

{

	struct mlx5_ib_umr_context *context;

	struct ib_wc wc;

	int err;



	while (1) {

		err = ib_poll_cq(cq, 1, &wc);

		if (err < 0) {

			pr_warn("poll cq error %d\n", err);

			return;

		}

		if (err == 0)

			break;

	struct mlx5_ib_umr_context *context =

		container_of(wc->wr_cqe, struct mlx5_ib_umr_context, cqe);



		context = (struct mlx5_ib_umr_context *) (unsigned long) wc.wr_id;

		context->status = wc.status;

	context->status = wc->status;

	complete(&context->done);

}

	ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);



static inline void mlx5_ib_init_umr_context(struct mlx5_ib_umr_context *context)

{

	context->cqe.done = mlx5_ib_umr_done;

	context->status = -1;

	init_completion(&context->done);

}



static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
@@ -896,12 +890,13 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem, 
	if (err)

		goto free_mr;



	mlx5_ib_init_umr_context(&umr_context);



	memset(&umrwr, 0, sizeof(umrwr));

	umrwr.wr.wr_id = (u64)(unsigned long)&umr_context;

	umrwr.wr.wr_cqe = &umr_context.cqe;

	prep_umr_reg_wqe(pd, &umrwr.wr, &sg, dma, npages, mr->mmkey.key,

			 page_shift, virt_addr, len, access_flags);



	mlx5_ib_init_umr_context(&umr_context);

	down(&umrc->sem);

	err = ib_post_send(umrc->qp, &umrwr.wr, &bad);

	if (err) {
@@ -1013,8 +1008,10 @@ int mlx5_ib_update_mtt(struct mlx5_ib_mr *mr, u64 start_page_index, int npages, 


		dma_sync_single_for_device(ddev, dma, size, DMA_TO_DEVICE);



		mlx5_ib_init_umr_context(&umr_context);



		memset(&wr, 0, sizeof(wr));

		wr.wr.wr_id = (u64)(unsigned long)&umr_context;

		wr.wr.wr_cqe = &umr_context.cqe;



		sg.addr = dma;

		sg.length = ALIGN(npages * sizeof(u64),
@@ -1031,7 +1028,6 @@ int mlx5_ib_update_mtt(struct mlx5_ib_mr *mr, u64 start_page_index, int npages, 
		wr.mkey = mr->mmkey.key;

		wr.target.offset = start_page_index;



		mlx5_ib_init_umr_context(&umr_context);

		down(&umrc->sem);

		err = ib_post_send(umrc->qp, &wr.wr, &bad);

		if (err) {
@@ -1204,11 +1200,12 @@ static int unreg_umr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr) 
	struct ib_send_wr *bad;

	int err;



	mlx5_ib_init_umr_context(&umr_context);



	memset(&umrwr.wr, 0, sizeof(umrwr));

	umrwr.wr.wr_id = (u64)(unsigned long)&umr_context;

	umrwr.wr.wr_cqe = &umr_context.cqe;

	prep_umr_unreg_wqe(dev, &umrwr.wr, mr->mmkey.key);



	mlx5_ib_init_umr_context(&umr_context);

	down(&umrc->sem);

	err = ib_post_send(umrc->qp, &umrwr.wr, &bad);

	if (err) {
@@ -1246,7 +1243,9 @@ static int rereg_umr(struct ib_pd *pd, struct mlx5_ib_mr *mr, u64 virt_addr, 
	int size;

	int err;



	umrwr.wr.wr_id = (u64)(unsigned long)&umr_context;

	mlx5_ib_init_umr_context(&umr_context);



	umrwr.wr.wr_cqe = &umr_context.cqe;

	umrwr.wr.send_flags = MLX5_IB_SEND_UMR_FAIL_IF_FREE;



	if (flags & IB_MR_REREG_TRANS) {
@@ -1273,8 +1272,6 @@ static int rereg_umr(struct ib_pd *pd, struct mlx5_ib_mr *mr, u64 virt_addr, 
		umrwr.wr.send_flags |= MLX5_IB_SEND_UMR_UPDATE_ACCESS;

	}



	mlx5_ib_init_umr_context(&umr_context);



	/* post send request to UMR QP */

	down(&umrc->sem);

	err = ib_post_send(umrc->qp, &umrwr.wr, &bad);