RDMA/hns: Remove redundant 'use_lowmem' argument from hns_roce_init_hem_table()

mainline inclusion
from mainline-v6.1-rc1
commit 29dc0635
category: cleanup
bugzilla: https://gitee.com/openeuler/kernel/issues/I7A4LC
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=29dc063596772368aa896f293f5c5aef06381712

----------------------------------------------------------------------

As hns_roce_init_hem_table() is always called with use_lowmem
being '1', and table->lowmem is set according to that argument,
so remove table->lowmem too.

Also, as the table->lowmem is used to indicate a dma buffer
is allocated with GFP_HIGHUSER or GFP_KERNEL, and calling
dma_alloc_coherent() with GFP_KERNEL seems like a common
pattern.

Link: https://lore.kernel.org/r/20220922123315.3732205-7-xuhaoyue1@hisilicon.comSigned-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NHaoyue Xu <xuhaoyue1@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: NZhou Juan <nnuzj07170227@163.com>

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -293,7 +293,6 @@ struct hns_roce_hem_table {
 	/* Single obj size */
 	unsigned long	obj_size;
 	unsigned long	table_chunk_size;
-	int		lowmem;
 	struct mutex	mutex;
 	struct hns_roce_hem **hem;
 	u64		**bt_l1;

drivers/infiniband/hw/hns/hns_roce_hem.c

@@ -455,7 +455,7 @@ static int alloc_mhop_hem(struct hns_roce_dev *hr_dev,
 	 * alloc bt space chunk for MTT/CQE.
 	 */
 	size = table->type < HEM_TYPE_MTT ? mhop->buf_chunk_size : bt_size;
-	flag = (table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) | __GFP_NOWARN;
+	flag = GFP_KERNEL | __GFP_NOWARN;
 	table->hem[index->buf] = hns_roce_alloc_hem(hr_dev, size >> PAGE_SHIFT,
 						    size, flag);
 	if (!table->hem[index->buf]) {
@@ -588,8 +588,7 @@ int hns_roce_table_get(struct hns_roce_dev *hr_dev,
 	table->hem[i] = hns_roce_alloc_hem(hr_dev,
 				       table->table_chunk_size >> PAGE_SHIFT,
 				       table->table_chunk_size,
-				       (table->lowmem ? GFP_KERNEL :
-					GFP_HIGHUSER) | __GFP_NOWARN);
+				       GFP_KERNEL | __GFP_NOWARN);
 	if (!table->hem[i]) {
 		ret = -ENOMEM;
 		goto out;
@@ -738,9 +737,6 @@ void *hns_roce_table_find(struct hns_roce_dev *hr_dev,
 	int length;
 	int i, j;
 
-	if (!table->lowmem)
-		return NULL;
-
 	mutex_lock(&table->mutex);
 
 	if (!hns_roce_check_whether_mhop(hr_dev, table->type)) {
@@ -796,8 +792,7 @@ void *hns_roce_table_find(struct hns_roce_dev *hr_dev,
 
 int hns_roce_init_hem_table(struct hns_roce_dev *hr_dev,
 			    struct hns_roce_hem_table *table, u32 type,
-			    unsigned long obj_size, unsigned long nobj,
-			    int use_lowmem)
+			    unsigned long obj_size, unsigned long nobj)
 {
 	unsigned long obj_per_chunk;
 	unsigned long num_hem;
@@ -874,7 +869,6 @@ int hns_roce_init_hem_table(struct hns_roce_dev *hr_dev,
 	table->type = type;
 	table->num_hem = num_hem;
 	table->obj_size = obj_size;
-	table->lowmem = use_lowmem;
 	mutex_init(&table->mutex);
 
 	return 0;

drivers/infiniband/hw/hns/hns_roce_hem.h

@@ -111,8 +111,7 @@ void *hns_roce_table_find(struct hns_roce_dev *hr_dev,
 			  dma_addr_t *dma_handle);
 int hns_roce_init_hem_table(struct hns_roce_dev *hr_dev,
 			    struct hns_roce_hem_table *table, u32 type,
-			    unsigned long obj_size, unsigned long nobj,
-			    int use_lowmem);
+			    unsigned long obj_size, unsigned long nobj);
 void hns_roce_cleanup_hem_table(struct hns_roce_dev *hr_dev,
 				struct hns_roce_hem_table *table);
 void hns_roce_cleanup_hem(struct hns_roce_dev *hr_dev);

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -1105,7 +1105,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 
 	ret = hns_roce_init_hem_table(hr_dev, &hr_dev->mr_table.mtpt_table,
 				      HEM_TYPE_MTPT, hr_dev->caps.mtpt_entry_sz,
-				      hr_dev->caps.num_mtpts, 1);
+				      hr_dev->caps.num_mtpts);
 	if (ret) {
 		dev_err(dev, "Failed to init MTPT context memory, aborting.\n");
 		return ret;
@@ -1113,7 +1113,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 
 	ret = hns_roce_init_hem_table(hr_dev, &hr_dev->qp_table.qp_table,
 				      HEM_TYPE_QPC, hr_dev->caps.qpc_sz,
-				      hr_dev->caps.num_qps, 1);
+				      hr_dev->caps.num_qps);
 	if (ret) {
 		dev_err(dev, "Failed to init QP context memory, aborting.\n");
 		goto err_unmap_dmpt;
@@ -1123,7 +1123,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 				      HEM_TYPE_IRRL,
 				      hr_dev->caps.irrl_entry_sz *
 				      hr_dev->caps.max_qp_init_rdma,
-				      hr_dev->caps.num_qps, 1);
+				      hr_dev->caps.num_qps);
 	if (ret) {
 		dev_err(dev, "Failed to init irrl_table memory, aborting.\n");
 		goto err_unmap_qp;
@@ -1135,7 +1135,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 					      HEM_TYPE_TRRL,
 					      hr_dev->caps.trrl_entry_sz *
 					      hr_dev->caps.max_qp_dest_rdma,
-					      hr_dev->caps.num_qps, 1);
+					      hr_dev->caps.num_qps);
 		if (ret) {
 			dev_err(dev,
 				"Failed to init trrl_table memory, aborting.\n");
@@ -1145,7 +1145,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 
 	ret = hns_roce_init_hem_table(hr_dev, &hr_dev->cq_table.table,
 				      HEM_TYPE_CQC, hr_dev->caps.cqc_entry_sz,
-				      hr_dev->caps.num_cqs, 1);
+				      hr_dev->caps.num_cqs);
 	if (ret) {
 		dev_err(dev, "Failed to init CQ context memory, aborting.\n");
 		goto err_unmap_trrl;
@@ -1155,7 +1155,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 		ret = hns_roce_init_hem_table(hr_dev, &hr_dev->srq_table.table,
 					      HEM_TYPE_SRQC,
 					      hr_dev->caps.srqc_entry_sz,
-					      hr_dev->caps.num_srqs, 1);
+					      hr_dev->caps.num_srqs);
 		if (ret) {
 			dev_err(dev,
 				"Failed to init SRQ context memory, aborting.\n");
@@ -1168,7 +1168,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 					      &hr_dev->qp_table.sccc_table,
 					      HEM_TYPE_SCCC,
 					      hr_dev->caps.sccc_sz,
-					      hr_dev->caps.num_qps, 1);
+					      hr_dev->caps.num_qps);
 		if (ret) {
 			dev_err(dev,
 				"Failed to init SCC context memory, aborting.\n");
@@ -1180,7 +1180,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 		ret = hns_roce_init_hem_table(hr_dev, &hr_dev->qpc_timer_table,
 					      HEM_TYPE_QPC_TIMER,
 					      hr_dev->caps.qpc_timer_entry_sz,
-					      hr_dev->caps.num_qpc_timer, 1);
+					      hr_dev->caps.num_qpc_timer);
 		if (ret) {
 			dev_err(dev,
 				"Failed to init QPC timer memory, aborting.\n");
@@ -1192,7 +1192,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 		ret = hns_roce_init_hem_table(hr_dev, &hr_dev->cqc_timer_table,
 					      HEM_TYPE_CQC_TIMER,
 					      hr_dev->caps.cqc_timer_entry_sz,
-					      hr_dev->caps.cqc_timer_bt_num, 1);
+					      hr_dev->caps.cqc_timer_bt_num);
 		if (ret) {
 			dev_err(dev,
 				"Failed to init CQC timer memory, aborting.\n");
@@ -1204,7 +1204,7 @@ static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 		ret = hns_roce_init_hem_table(hr_dev, &hr_dev->gmv_table,
 					      HEM_TYPE_GMV,
 					      hr_dev->caps.gmv_entry_sz,
-					      hr_dev->caps.gmv_entry_num, 1);
+					      hr_dev->caps.gmv_entry_num);
 		if (ret) {
 			dev_err(dev,
 				"failed to init gmv table memory, ret = %d\n",