RDMA/hns: Remove unused MTT functions

The MTT (Memory Translate Table) interface is no longer used to configure
the buffer address to BT (Base Address Table) that requires driver
mapping.  Because the MTT is not compatible with multi-hop addressing of
the hip08, it is replaced by MTR (Memory Translate Region) interface, and
all the MTT functions should be removed.

Link: https://lore.kernel.org/r/1588071823-40200-3-git-send-email-liweihang@huawei.com
Signed-off-by: Xi Wang <wangxi11@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 0 insertions, 521 deletions

diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c
index c65f1f682819..ecd76759d47a 100644
--- a/drivers/infiniband/hw/hns/hns_roce_mr.c
+++ b/drivers/infiniband/hw/hns/hns_roce_mr.c
@@ -66,233 +66,6 @@ int hns_roce_hw_destroy_mpt(struct hns_roce_dev *hr_dev,
 				 HNS_ROCE_CMD_TIMEOUT_MSECS);
 }
 
-static int hns_roce_buddy_alloc(struct hns_roce_buddy *buddy, int order,
-				unsigned long *seg)
-{
-	int o;
-	u32 m;
-
-	spin_lock(&buddy->lock);
-
-	for (o = order; o <= buddy->max_order; ++o) {
-		if (buddy->num_free[o]) {
-			m = 1 << (buddy->max_order - o);
-			*seg = find_first_bit(buddy->bits[o], m);
-			if (*seg < m)
-				goto found;
-		}
-	}
-	spin_unlock(&buddy->lock);
-	return -EINVAL;
-
- found:
-	clear_bit(*seg, buddy->bits[o]);
-	--buddy->num_free[o];
-
-	while (o > order) {
-		--o;
-		*seg <<= 1;
-		set_bit(*seg ^ 1, buddy->bits[o]);
-		++buddy->num_free[o];
-	}
-
-	spin_unlock(&buddy->lock);
-
-	*seg <<= order;
-	return 0;
-}
-
-static void hns_roce_buddy_free(struct hns_roce_buddy *buddy, unsigned long seg,
-				int order)
-{
-	seg >>= order;
-
-	spin_lock(&buddy->lock);
-
-	while (test_bit(seg ^ 1, buddy->bits[order])) {
-		clear_bit(seg ^ 1, buddy->bits[order]);
-		--buddy->num_free[order];
-		seg >>= 1;
-		++order;
-	}
-
-	set_bit(seg, buddy->bits[order]);
-	++buddy->num_free[order];
-
-	spin_unlock(&buddy->lock);
-}
-
-static int hns_roce_buddy_init(struct hns_roce_buddy *buddy, int max_order)
-{
-	int i, s;
-
-	buddy->max_order = max_order;
-	spin_lock_init(&buddy->lock);
-	buddy->bits = kcalloc(buddy->max_order + 1,
-			      sizeof(*buddy->bits),
-			      GFP_KERNEL);
-	buddy->num_free = kcalloc(buddy->max_order + 1,
-				  sizeof(*buddy->num_free),
-				  GFP_KERNEL);
-	if (!buddy->bits || !buddy->num_free)
-		goto err_out;
-
-	for (i = 0; i <= buddy->max_order; ++i) {
-		s = BITS_TO_LONGS(1 << (buddy->max_order - i));
-		buddy->bits[i] = kcalloc(s, sizeof(long), GFP_KERNEL |
-					 __GFP_NOWARN);
-		if (!buddy->bits[i]) {
-			buddy->bits[i] = vzalloc(array_size(s, sizeof(long)));
-			if (!buddy->bits[i])
-				goto err_out_free;
-		}
-	}
-
-	set_bit(0, buddy->bits[buddy->max_order]);
-	buddy->num_free[buddy->max_order] = 1;
-
-	return 0;
-
-err_out_free:
-	for (i = 0; i <= buddy->max_order; ++i)
-		kvfree(buddy->bits[i]);
-
-err_out:
-	kfree(buddy->bits);
-	kfree(buddy->num_free);
-	return -ENOMEM;
-}
-
-static void hns_roce_buddy_cleanup(struct hns_roce_buddy *buddy)
-{
-	int i;
-
-	for (i = 0; i <= buddy->max_order; ++i)
-		kvfree(buddy->bits[i]);
-
-	kfree(buddy->bits);
-	kfree(buddy->num_free);
-}
-
-static int hns_roce_alloc_mtt_range(struct hns_roce_dev *hr_dev, int order,
-				    unsigned long *seg, u32 mtt_type)
-{
-	struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
-	struct hns_roce_hem_table *table;
-	struct hns_roce_buddy *buddy;
-	int ret;
-
-	switch (mtt_type) {
-	case MTT_TYPE_WQE:
-		buddy = &mr_table->mtt_buddy;
-		table = &mr_table->mtt_table;
-		break;
-	case MTT_TYPE_CQE:
-		buddy = &mr_table->mtt_cqe_buddy;
-		table = &mr_table->mtt_cqe_table;
-		break;
-	case MTT_TYPE_SRQWQE:
-		buddy = &mr_table->mtt_srqwqe_buddy;
-		table = &mr_table->mtt_srqwqe_table;
-		break;
-	case MTT_TYPE_IDX:
-		buddy = &mr_table->mtt_idx_buddy;
-		table = &mr_table->mtt_idx_table;
-		break;
-	default:
-		dev_err(hr_dev->dev, "Unsupport MTT table type: %d\n",
-			mtt_type);
-		return -EINVAL;
-	}
-
-	ret = hns_roce_buddy_alloc(buddy, order, seg);
-	if (ret)
-		return ret;
-
-	ret = hns_roce_table_get_range(hr_dev, table, *seg,
-				       *seg + (1 << order) - 1);
-	if (ret) {
-		hns_roce_buddy_free(buddy, *seg, order);
-		return ret;
-	}
-
-	return 0;
-}
-
-int hns_roce_mtt_init(struct hns_roce_dev *hr_dev, int npages, int page_shift,
-		      struct hns_roce_mtt *mtt)
-{
-	int ret;
-	int i;
-
-	/* Page num is zero, correspond to DMA memory register */
-	if (!npages) {
-		mtt->order = -1;
-		mtt->page_shift = HNS_ROCE_HEM_PAGE_SHIFT;
-		return 0;
-	}
-
-	/* Note: if page_shift is zero, FAST memory register */
-	mtt->page_shift = page_shift;
-
-	/* Compute MTT entry necessary */
-	for (mtt->order = 0, i = HNS_ROCE_MTT_ENTRY_PER_SEG; i < npages;
-	     i <<= 1)
-		++mtt->order;
-
-	/* Allocate MTT entry */
-	ret = hns_roce_alloc_mtt_range(hr_dev, mtt->order, &mtt->first_seg,
-				       mtt->mtt_type);
-	if (ret)
-		return -ENOMEM;
-
-	return 0;
-}
-
-void hns_roce_mtt_cleanup(struct hns_roce_dev *hr_dev, struct hns_roce_mtt *mtt)
-{
-	struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
-
-	if (mtt->order < 0)
-		return;
-
-	switch (mtt->mtt_type) {
-	case MTT_TYPE_WQE:
-		hns_roce_buddy_free(&mr_table->mtt_buddy, mtt->first_seg,
-				    mtt->order);
-		hns_roce_table_put_range(hr_dev, &mr_table->mtt_table,
-					mtt->first_seg,
-					mtt->first_seg + (1 << mtt->order) - 1);
-		break;
-	case MTT_TYPE_CQE:
-		hns_roce_buddy_free(&mr_table->mtt_cqe_buddy, mtt->first_seg,
-				    mtt->order);
-		hns_roce_table_put_range(hr_dev, &mr_table->mtt_cqe_table,
-					mtt->first_seg,
-					mtt->first_seg + (1 << mtt->order) - 1);
-		break;
-	case MTT_TYPE_SRQWQE:
-		hns_roce_buddy_free(&mr_table->mtt_srqwqe_buddy, mtt->first_seg,
-				    mtt->order);
-		hns_roce_table_put_range(hr_dev, &mr_table->mtt_srqwqe_table,
-					mtt->first_seg,
-					mtt->first_seg + (1 << mtt->order) - 1);
-		break;
-	case MTT_TYPE_IDX:
-		hns_roce_buddy_free(&mr_table->mtt_idx_buddy, mtt->first_seg,
-				    mtt->order);
-		hns_roce_table_put_range(hr_dev, &mr_table->mtt_idx_table,
-					mtt->first_seg,
-					mtt->first_seg + (1 << mtt->order) - 1);
-		break;
-	default:
-		dev_err(hr_dev->dev,
-			"Unsupport mtt type %d, clean mtt failed\n",
-			mtt->mtt_type);
-		break;
-	}
-}
-
 static int alloc_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr,
 			u32 pd, u64 iova, u64 size, u32 access)
 {
@@ -433,131 +206,6 @@ err_page:
 	return ret;
 }
 
-static int hns_roce_write_mtt_chunk(struct hns_roce_dev *hr_dev,
-				    struct hns_roce_mtt *mtt, u32 start_index,
-				    u32 npages, u64 *page_list)
-{
-	struct hns_roce_hem_table *table;
-	dma_addr_t dma_handle;
-	__le64 *mtts;
-	u32 bt_page_size;
-	u32 i;
-
-	switch (mtt->mtt_type) {
-	case MTT_TYPE_WQE:
-		table = &hr_dev->mr_table.mtt_table;
-		bt_page_size = 1 << (hr_dev->caps.mtt_ba_pg_sz + PAGE_SHIFT);
-		break;
-	case MTT_TYPE_CQE:
-		table = &hr_dev->mr_table.mtt_cqe_table;
-		bt_page_size = 1 << (hr_dev->caps.cqe_ba_pg_sz + PAGE_SHIFT);
-		break;
-	case MTT_TYPE_SRQWQE:
-		table = &hr_dev->mr_table.mtt_srqwqe_table;
-		bt_page_size = 1 << (hr_dev->caps.srqwqe_ba_pg_sz + PAGE_SHIFT);
-		break;
-	case MTT_TYPE_IDX:
-		table = &hr_dev->mr_table.mtt_idx_table;
-		bt_page_size = 1 << (hr_dev->caps.idx_ba_pg_sz + PAGE_SHIFT);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	/* All MTTs must fit in the same page */
-	if (start_index / (bt_page_size / sizeof(u64)) !=
-		(start_index + npages - 1) / (bt_page_size / sizeof(u64)))
-		return -EINVAL;
-
-	if (start_index & (HNS_ROCE_MTT_ENTRY_PER_SEG - 1))
-		return -EINVAL;
-
-	mtts = hns_roce_table_find(hr_dev, table,
-				mtt->first_seg +
-				start_index / HNS_ROCE_MTT_ENTRY_PER_SEG,
-				&dma_handle);
-	if (!mtts)
-		return -ENOMEM;
-
-	/* Save page addr, low 12 bits : 0 */
-	for (i = 0; i < npages; ++i) {
-		if (!hr_dev->caps.mtt_hop_num)
-			mtts[i] = cpu_to_le64(page_list[i] >> PAGE_ADDR_SHIFT);
-		else
-			mtts[i] = cpu_to_le64(page_list[i]);
-	}
-
-	return 0;
-}
-
-static int hns_roce_write_mtt(struct hns_roce_dev *hr_dev,
-			      struct hns_roce_mtt *mtt, u32 start_index,
-			      u32 npages, u64 *page_list)
-{
-	int chunk;
-	int ret;
-	u32 bt_page_size;
-
-	if (mtt->order < 0)
-		return -EINVAL;
-
-	switch (mtt->mtt_type) {
-	case MTT_TYPE_WQE:
-		bt_page_size = 1 << (hr_dev->caps.mtt_ba_pg_sz + PAGE_SHIFT);
-		break;
-	case MTT_TYPE_CQE:
-		bt_page_size = 1 << (hr_dev->caps.cqe_ba_pg_sz + PAGE_SHIFT);
-		break;
-	case MTT_TYPE_SRQWQE:
-		bt_page_size = 1 << (hr_dev->caps.srqwqe_ba_pg_sz + PAGE_SHIFT);
-		break;
-	case MTT_TYPE_IDX:
-		bt_page_size = 1 << (hr_dev->caps.idx_ba_pg_sz + PAGE_SHIFT);
-		break;
-	default:
-		dev_err(hr_dev->dev,
-			"Unsupport mtt type %d, write mtt failed\n",
-			mtt->mtt_type);
-		return -EINVAL;
-	}
-
-	while (npages > 0) {
-		chunk = min_t(int, bt_page_size / sizeof(u64), npages);
-
-		ret = hns_roce_write_mtt_chunk(hr_dev, mtt, start_index, chunk,
-					       page_list);
-		if (ret)
-			return ret;
-
-		npages -= chunk;
-		start_index += chunk;
-		page_list += chunk;
-	}
-
-	return 0;
-}
-
-int hns_roce_buf_write_mtt(struct hns_roce_dev *hr_dev,
-			   struct hns_roce_mtt *mtt, struct hns_roce_buf *buf)
-{
-	u64 *page_list;
-	int ret;
-	u32 i;
-
-	page_list = kmalloc_array(buf->npages, sizeof(*page_list), GFP_KERNEL);
-	if (!page_list)
-		return -ENOMEM;
-
-	for (i = 0; i < buf->npages; ++i)
-		page_list[i] = hns_roce_buf_page(buf, i);
-
-	ret = hns_roce_write_mtt(hr_dev, mtt, 0, buf->npages, page_list);
-
-	kfree(page_list);
-
-	return ret;
-}
-
 int hns_roce_init_mr_table(struct hns_roce_dev *hr_dev)
 {
 	struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
@@ -567,50 +215,6 @@ int hns_roce_init_mr_table(struct hns_roce_dev *hr_dev)
 				   hr_dev->caps.num_mtpts,
 				   hr_dev->caps.num_mtpts - 1,
 				   hr_dev->caps.reserved_mrws, 0);
-	if (ret)
-		return ret;
-
-	ret = hns_roce_buddy_init(&mr_table->mtt_buddy,
-				  ilog2(hr_dev->caps.num_mtt_segs));
-	if (ret)
-		goto err_buddy;
-
-	if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE)) {
-		ret = hns_roce_buddy_init(&mr_table->mtt_cqe_buddy,
-					  ilog2(hr_dev->caps.num_cqe_segs));
-		if (ret)
-			goto err_buddy_cqe;
-	}
-
-	if (hr_dev->caps.num_srqwqe_segs) {
-		ret = hns_roce_buddy_init(&mr_table->mtt_srqwqe_buddy,
-					  ilog2(hr_dev->caps.num_srqwqe_segs));
-		if (ret)
-			goto err_buddy_srqwqe;
-	}
-
-	if (hr_dev->caps.num_idx_segs) {
-		ret = hns_roce_buddy_init(&mr_table->mtt_idx_buddy,
-					  ilog2(hr_dev->caps.num_idx_segs));
-		if (ret)
-			goto err_buddy_idx;
-	}
-
-	return 0;
-
-err_buddy_idx:
-	if (hr_dev->caps.num_srqwqe_segs)
-		hns_roce_buddy_cleanup(&mr_table->mtt_srqwqe_buddy);
-
-err_buddy_srqwqe:
-	if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE))
-		hns_roce_buddy_cleanup(&mr_table->mtt_cqe_buddy);
-
-err_buddy_cqe:
-	hns_roce_buddy_cleanup(&mr_table->mtt_buddy);
-
-err_buddy:
-	hns_roce_bitmap_cleanup(&mr_table->mtpt_bitmap);
 	return ret;
 }
 
@@ -618,13 +222,6 @@ void hns_roce_cleanup_mr_table(struct hns_roce_dev *hr_dev)
 {
 	struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
 
-	if (hr_dev->caps.num_idx_segs)
-		hns_roce_buddy_cleanup(&mr_table->mtt_idx_buddy);
-	if (hr_dev->caps.num_srqwqe_segs)
-		hns_roce_buddy_cleanup(&mr_table->mtt_srqwqe_buddy);
-	hns_roce_buddy_cleanup(&mr_table->mtt_buddy);
-	if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE))
-		hns_roce_buddy_cleanup(&mr_table->mtt_cqe_buddy);
 	hns_roce_bitmap_cleanup(&mr_table->mtpt_bitmap);
 }
 
@@ -661,77 +258,6 @@ err_free:
 	return ERR_PTR(ret);
 }
 
-int hns_roce_ib_umem_write_mtt(struct hns_roce_dev *hr_dev,
-			       struct hns_roce_mtt *mtt, struct ib_umem *umem)
-{
-	struct device *dev = hr_dev->dev;
-	struct sg_dma_page_iter sg_iter;
-	unsigned int order;
-	int npage = 0;
-	int ret = 0;
-	int i;
-	u64 page_addr;
-	u64 *pages;
-	u32 bt_page_size;
-	u32 n;
-
-	switch (mtt->mtt_type) {
-	case MTT_TYPE_WQE:
-		order = hr_dev->caps.mtt_ba_pg_sz;
-		break;
-	case MTT_TYPE_CQE:
-		order = hr_dev->caps.cqe_ba_pg_sz;
-		break;
-	case MTT_TYPE_SRQWQE:
-		order = hr_dev->caps.srqwqe_ba_pg_sz;
-		break;
-	case MTT_TYPE_IDX:
-		order = hr_dev->caps.idx_ba_pg_sz;
-		break;
-	default:
-		dev_err(dev, "Unsupport mtt type %d, write mtt failed\n",
-			mtt->mtt_type);
-		return -EINVAL;
-	}
-
-	bt_page_size = 1 << (order + PAGE_SHIFT);
-
-	pages = (u64 *) __get_free_pages(GFP_KERNEL, order);
-	if (!pages)
-		return -ENOMEM;
-
-	i = n = 0;
-
-	for_each_sg_dma_page(umem->sg_head.sgl, &sg_iter, umem->nmap, 0) {
-		page_addr = sg_page_iter_dma_address(&sg_iter);
-		if (!(npage % (1 << (mtt->page_shift - PAGE_SHIFT)))) {
-			if (page_addr & ((1 << mtt->page_shift) - 1)) {
-				dev_err(dev,
-					"page_addr is not page_shift %d alignment!\n",
-					mtt->page_shift);
-				ret = -EINVAL;
-				goto out;
-			}
-			pages[i++] = page_addr;
-		}
-		npage++;
-		if (i == bt_page_size / sizeof(u64)) {
-			ret = hns_roce_write_mtt(hr_dev, mtt, n, i, pages);
-			if (ret)
-				goto out;
-			n += i;
-			i = 0;
-		}
-	}
-
-	if (i)
-		ret = hns_roce_write_mtt(hr_dev, mtt, n, i, pages);
-
-out:
-	free_pages((unsigned long) pages, order);
-	return ret;
-}
-
 struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 				   u64 virt_addr, int access_flags,
 				   struct ib_udata *udata)
@@ -1112,20 +638,6 @@ int hns_roce_dealloc_mw(struct ib_mw *ibmw)
 	return 0;
 }
 
-void hns_roce_mtr_init(struct hns_roce_mtr *mtr, int bt_pg_shift,
-		       int buf_pg_shift)
-{
-	hns_roce_hem_list_init(&mtr->hem_list);
-	mtr->hem_cfg.buf_pg_shift = buf_pg_shift;
-	mtr->hem_cfg.ba_pg_shift = bt_pg_shift;
-}
-
-void hns_roce_mtr_cleanup(struct hns_roce_dev *hr_dev,
-			  struct hns_roce_mtr *mtr)
-{
-	hns_roce_hem_list_release(hr_dev, &mtr->hem_list);
-}
-
 static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 			  dma_addr_t *pages, struct hns_roce_buf_region *region)
 {
@@ -1165,39 +677,6 @@ static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 	return 0;
 }
 
-int hns_roce_mtr_attach(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
-			dma_addr_t **bufs, struct hns_roce_buf_region *regions,
-			int region_cnt)
-{
-	struct hns_roce_buf_region *r;
-	int ret;
-	int i;
-
-	ret = hns_roce_hem_list_request(hr_dev, &mtr->hem_list, regions,
-					region_cnt, mtr->hem_cfg.ba_pg_shift);
-	if (ret)
-		return ret;
-
-	mtr->hem_cfg.root_ba = mtr->hem_list.root_ba;
-	for (i = 0; i < region_cnt; i++) {
-		r = &regions[i];
-		ret = mtr_map_region(hr_dev, mtr, bufs[i], r);
-		if (ret) {
-			dev_err(hr_dev->dev,
-				"write mtr[%d/%d] err %d,offset=%d.\n",
-				i, region_cnt, ret,  r->offset);
-			goto err_write;
-		}
-	}
-
-	return 0;
-
-err_write:
-	hns_roce_hem_list_release(hr_dev, &mtr->hem_list);
-
-	return ret;
-}
-
 static inline bool mtr_has_mtt(struct hns_roce_buf_attr *attr)
 {
 	int i;