From: Xi Wang <wangxi11@huawei.com>
Date: Tue, 17 Mar 2020 11:55:24 +0800
Subject: RDMA/hns: Optimize mhop put flow for multi-hop addressing
Patch-mainline: v5.7-rc1
Git-commit: 38dcb35048fdc9b11530b23c092b250b2e8135a1
References: jsc#SLE-14777
Optimizes hns_roce_table_mhop_get() by encapsulating code about clearing
hem into clear_mhop_hem(), which will make the code flow clearer.
Link: https://lore.kernel.org/r/1584417324-2255-3-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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/hns/hns_roce_hem.c | 161 +++++++++++--------------------
1 file changed, 61 insertions(+), 100 deletions(-)
--- a/drivers/infiniband/hw/hns/hns_roce_hem.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hem.c
@@ -94,25 +94,27 @@ bool hns_roce_check_whether_mhop(struct
return hop_num ? true : false;
}
-static bool hns_roce_check_hem_null(struct hns_roce_hem **hem, u64 start_idx,
- u32 bt_chunk_num, u64 hem_max_num)
+static bool hns_roce_check_hem_null(struct hns_roce_hem **hem, u64 hem_idx,
+ u32 bt_chunk_num, u64 hem_max_num)
{
+ u64 start_idx = round_down(hem_idx, bt_chunk_num);
u64 check_max_num = start_idx + bt_chunk_num;
u64 i;
for (i = start_idx; (i < check_max_num) && (i < hem_max_num); i++)
- if (hem[i])
+ if (i != hem_idx && hem[i])
return false;
return true;
}
-static bool hns_roce_check_bt_null(u64 **bt, u64 start_idx, u32 bt_chunk_num)
+static bool hns_roce_check_bt_null(u64 **bt, u64 ba_idx, u32 bt_chunk_num)
{
+ u64 start_idx = round_down(ba_idx, bt_chunk_num);
int i;
for (i = 0; i < bt_chunk_num; i++)
- if (bt[start_idx + i])
+ if (i != ba_idx && bt[start_idx + i])
return false;
return true;
@@ -723,116 +725,75 @@ out:
return ret;
}
+static void clear_mhop_hem(struct hns_roce_dev *hr_dev,
+ struct hns_roce_hem_table *table, unsigned long obj,
+ struct hns_roce_hem_mhop *mhop,
+ struct hns_roce_hem_index *index)
+{
+ struct ib_device *ibdev = &hr_dev->ib_dev;
+ u32 hop_num = mhop->hop_num;
+ u32 chunk_ba_num;
+ int step_idx;
+
+ index->inited = HEM_INDEX_BUF;
+ chunk_ba_num = mhop->bt_chunk_size / BA_BYTE_LEN;
+ if (check_whether_bt_num_2(table->type, hop_num)) {
+ if (hns_roce_check_hem_null(table->hem, index->buf,
+ chunk_ba_num, table->num_hem))
+ index->inited |= HEM_INDEX_L0;
+ } else if (check_whether_bt_num_3(table->type, hop_num)) {
+ if (hns_roce_check_hem_null(table->hem, index->buf,
+ chunk_ba_num, table->num_hem)) {
+ index->inited |= HEM_INDEX_L1;
+ if (hns_roce_check_bt_null(table->bt_l1, index->l1,
+ chunk_ba_num))
+ index->inited |= HEM_INDEX_L0;
+ }
+ }
+
+ if (table->type < HEM_TYPE_MTT) {
+ if (hop_num == HNS_ROCE_HOP_NUM_0)
+ step_idx = 0;
+ else
+ step_idx = hop_num;
+
+ if (hr_dev->hw->clear_hem(hr_dev, table, obj, step_idx))
+ ibdev_warn(ibdev, "Clear hop%d HEM failed.\n", hop_num);
+
+ if (index->inited & HEM_INDEX_L1)
+ if (hr_dev->hw->clear_hem(hr_dev, table, obj, 1))
+ ibdev_warn(ibdev, "Clear HEM step 1 failed.\n");
+
+ if (index->inited & HEM_INDEX_L0)
+ if (hr_dev->hw->clear_hem(hr_dev, table, obj, 0))
+ ibdev_warn(ibdev, "Clear HEM step 0 failed.\n");
+ }
+}
+
static void hns_roce_table_mhop_put(struct hns_roce_dev *hr_dev,
struct hns_roce_hem_table *table,
unsigned long obj,
int check_refcount)
{
- struct device *dev = hr_dev->dev;
- struct hns_roce_hem_mhop mhop;
- unsigned long mhop_obj = obj;
- u32 bt_chunk_size;
- u32 chunk_ba_num;
- u32 hop_num;
- u32 start_idx;
- u32 bt_num;
- u64 hem_idx;
- u64 bt_l1_idx = 0;
+ struct ib_device *ibdev = &hr_dev->ib_dev;
+ struct hns_roce_hem_index index = {};
+ struct hns_roce_hem_mhop mhop = {};
int ret;
- ret = hns_roce_calc_hem_mhop(hr_dev, table, &mhop_obj, &mhop);
- if (ret)
- return;
-
- bt_chunk_size = mhop.bt_chunk_size;
- hop_num = mhop.hop_num;
- chunk_ba_num = bt_chunk_size / BA_BYTE_LEN;
-
- bt_num = hns_roce_get_bt_num(table->type, hop_num);
- switch (bt_num) {
- case 3:
- hem_idx = mhop.l0_idx * chunk_ba_num * chunk_ba_num +
- mhop.l1_idx * chunk_ba_num + mhop.l2_idx;
- bt_l1_idx = mhop.l0_idx * chunk_ba_num + mhop.l1_idx;
- break;
- case 2:
- hem_idx = mhop.l0_idx * chunk_ba_num + mhop.l1_idx;
- break;
- case 1:
- hem_idx = mhop.l0_idx;
- break;
- default:
- dev_err(dev, "Table %d not support hop_num = %d!\n",
- table->type, hop_num);
+ ret = calc_hem_config(hr_dev, table, obj, &mhop, &index);
+ if (ret) {
+ ibdev_err(ibdev, "calc hem config failed!\n");
return;
}
mutex_lock(&table->mutex);
-
- if (check_refcount && (--table->hem[hem_idx]->refcount > 0)) {
+ if (check_refcount && (--table->hem[index.buf]->refcount > 0)) {
mutex_unlock(&table->mutex);
return;
}
- if (table->type < HEM_TYPE_MTT && hop_num == 1) {
- if (hr_dev->hw->clear_hem(hr_dev, table, obj, 1))
- dev_warn(dev, "Clear HEM base address failed.\n");
- } else if (table->type < HEM_TYPE_MTT && hop_num == 2) {
- if (hr_dev->hw->clear_hem(hr_dev, table, obj, 2))
- dev_warn(dev, "Clear HEM base address failed.\n");
- } else if (table->type < HEM_TYPE_MTT &&
- hop_num == HNS_ROCE_HOP_NUM_0) {
- if (hr_dev->hw->clear_hem(hr_dev, table, obj, 0))
- dev_warn(dev, "Clear HEM base address failed.\n");
- }
-
- /*
- * free buffer space chunk for QPC/MTPT/CQC/SRQC/SCCC.
- * free bt space chunk for MTT/CQE.
- */
- hns_roce_free_hem(hr_dev, table->hem[hem_idx]);
- table->hem[hem_idx] = NULL;
-
- if (check_whether_bt_num_2(table->type, hop_num)) {
- start_idx = mhop.l0_idx * chunk_ba_num;
- if (hns_roce_check_hem_null(table->hem, start_idx,
- chunk_ba_num, table->num_hem)) {
- if (table->type < HEM_TYPE_MTT &&
- hr_dev->hw->clear_hem(hr_dev, table, obj, 0))
- dev_warn(dev, "Clear HEM base address failed.\n");
-
- dma_free_coherent(dev, bt_chunk_size,
- table->bt_l0[mhop.l0_idx],
- table->bt_l0_dma_addr[mhop.l0_idx]);
- table->bt_l0[mhop.l0_idx] = NULL;
- }
- } else if (check_whether_bt_num_3(table->type, hop_num)) {
- start_idx = mhop.l0_idx * chunk_ba_num * chunk_ba_num +
- mhop.l1_idx * chunk_ba_num;
- if (hns_roce_check_hem_null(table->hem, start_idx,
- chunk_ba_num, table->num_hem)) {
- if (hr_dev->hw->clear_hem(hr_dev, table, obj, 1))
- dev_warn(dev, "Clear HEM base address failed.\n");
-
- dma_free_coherent(dev, bt_chunk_size,
- table->bt_l1[bt_l1_idx],
- table->bt_l1_dma_addr[bt_l1_idx]);
- table->bt_l1[bt_l1_idx] = NULL;
-
- start_idx = mhop.l0_idx * chunk_ba_num;
- if (hns_roce_check_bt_null(table->bt_l1, start_idx,
- chunk_ba_num)) {
- if (hr_dev->hw->clear_hem(hr_dev, table, obj,
- 0))
- dev_warn(dev, "Clear HEM base address failed.\n");
-
- dma_free_coherent(dev, bt_chunk_size,
- table->bt_l0[mhop.l0_idx],
- table->bt_l0_dma_addr[mhop.l0_idx]);
- table->bt_l0[mhop.l0_idx] = NULL;
- }
- }
- }
+ clear_mhop_hem(hr_dev, table, obj, &mhop, &index);
+ free_mhop_hem(hr_dev, table, &mhop, &index);
mutex_unlock(&table->mutex);
}