This patch updates to support rq record doorbell for
the kernel space.
Signed-off-by: Yixian Liu <liuyixian@xxxxxxxxxx>
Signed-off-by: Lijun Ou <oulijun@xxxxxxxxxx>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@xxxxxxxxxx>
Signed-off-by: Shaobo Xu <xushaobo2@xxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_db.c | 112 ++++++++++++++++++++++++++++
drivers/infiniband/hw/hns/hns_roce_device.h | 6 ++
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 15 +---
drivers/infiniband/hw/hns/hns_roce_main.c | 5 ++
drivers/infiniband/hw/hns/hns_roce_qp.c | 17 ++++-
5 files changed, 142 insertions(+), 13 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_db.c b/drivers/infiniband/hw/hns/hns_roce_db.c
index 1604c95..f6edaf6 100644
--- a/drivers/infiniband/hw/hns/hns_roce_db.c
+++ b/drivers/infiniband/hw/hns/hns_roce_db.c
@@ -93,3 +93,115 @@ void hns_roce_db_unmap_user(struct hns_roce_ucontext *context,
mutex_unlock(&context->db_page_mutex);
}
EXPORT_SYMBOL(hns_roce_db_unmap_user);
+
+static struct hns_roce_db_pgdir *hns_roce_alloc_db_pgdir(
+ struct device *dma_device)
+{
+ struct hns_roce_db_pgdir *pgdir;
+
+ pgdir = kzalloc(sizeof(*pgdir), GFP_KERNEL);
+ if (!pgdir)
+ return NULL;
+
+ bitmap_fill(pgdir->order1, HNS_ROCE_DB_PER_PAGE / 2);
+ pgdir->bits[0] = pgdir->order0;
+ pgdir->bits[1] = pgdir->order1;
+ pgdir->db_page = dma_alloc_coherent(dma_device, PAGE_SIZE,
+ &pgdir->db_dma, GFP_KERNEL);
+ if (!pgdir->db_page) {
+ kfree(pgdir);
+ return NULL;
+ }
+
+ return pgdir;
+}
+
+static int hns_roce_alloc_db_from_pgdir(struct hns_roce_db_pgdir *pgdir,
+ struct hns_roce_db *db, int order)
+{
+ int o;
+ int i;
+
+ for (o = order; o <= 1; ++o) {
+ i = find_first_bit(pgdir->bits[o], HNS_ROCE_DB_PER_PAGE >> o);
+ if (i < HNS_ROCE_DB_PER_PAGE >> o)
+ goto found;
+ }
+
+ return -ENOMEM;
+
+found:
+ clear_bit(i, pgdir->bits[o]);
+
+ i <<= o;
+
+ if (o > order)
+ set_bit(i ^ 1, pgdir->bits[order]);
+
+ db->u.pgdir = pgdir;
+ db->index = i;
+ db->db_record = pgdir->db_page + db->index;
+ db->dma = pgdir->db_dma + db->index * 4;
+ db->order = order;
+
+ return 0;
+}
+
+int hns_roce_alloc_db(struct hns_roce_dev *hr_dev, struct hns_roce_db *db,
+ int order)
+{
+ struct hns_roce_db_pgdir *pgdir;
+ int ret = 0;
+
+ mutex_lock(&hr_dev->pgdir_mutex);
+
+ list_for_each_entry(pgdir, &hr_dev->pgdir_list, list)
+ if (!hns_roce_alloc_db_from_pgdir(pgdir, db, order))
+ goto out;
+
+ pgdir = hns_roce_alloc_db_pgdir(hr_dev->dev);
+ if (!pgdir) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ list_add(&pgdir->list, &hr_dev->pgdir_list);
+
+ /* This should never fail -- we just allocated an empty page: */
+ WARN_ON(hns_roce_alloc_db_from_pgdir(pgdir, db, order));
+
+out:
+ mutex_unlock(&hr_dev->pgdir_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(hns_roce_alloc_db);
+
+void hns_roce_free_db(struct hns_roce_dev *hr_dev, struct hns_roce_db *db)
+{
+ int o;
+ int i;
+
+ mutex_lock(&hr_dev->pgdir_mutex);
+
+ o = db->order;
+ i = db->index;
+
+ if (db->order == 0 && test_bit(i ^ 1, db->u.pgdir->order0)) {
+ clear_bit(i ^ 1, db->u.pgdir->order0);
+ ++o;
+ }
+
+ i >>= o;
+ set_bit(i, db->u.pgdir->bits[o]);
+
+ if (bitmap_full(db->u.pgdir->order1, HNS_ROCE_DB_PER_PAGE / 2)) {
+ dma_free_coherent(hr_dev->dev, PAGE_SIZE, db->u.pgdir->db_page,
+ db->u.pgdir->db_dma);
+ list_del(&db->u.pgdir->list);
+ kfree(db->u.pgdir);
+ }
+
+ mutex_unlock(&hr_dev->pgdir_mutex);
+}
+EXPORT_SYMBOL_GPL(hns_roce_free_db);
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index 7f44ecd..69d8c3f 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -771,6 +771,8 @@ struct hns_roce_dev {
spinlock_t bt_cmd_lock;
struct hns_roce_ib_iboe iboe;
+ struct list_head pgdir_list;
+ struct mutex pgdir_mutex;
int irq[HNS_ROCE_MAX_IRQ_NUM];
u8 __iomem *reg_base;
struct hns_roce_caps caps;
@@ -980,6 +982,10 @@ int hns_roce_db_map_user(struct hns_roce_ucontext *context, unsigned long virt,
struct hns_roce_db *db);
void hns_roce_db_unmap_user(struct hns_roce_ucontext *context,
struct hns_roce_db *db);
+int hns_roce_alloc_db(struct hns_roce_dev *hr_dev, struct hns_roce_db *db,
+ int order);
+void hns_roce_free_db(struct hns_roce_dev *hr_dev, struct hns_roce_db *db);
+
void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn);
void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type);
void hns_roce_qp_event(struct hns_roce_dev *hr_dev, u32 qpn, int event_type);
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 0cfa6d3..5dc57f6 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -482,7 +482,6 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
struct hns_roce_v2_wqe_data_seg *dseg;
struct hns_roce_rinl_sge *sge_list;
struct device *dev = hr_dev->dev;
- struct hns_roce_v2_db rq_db;
unsigned long flags;
void *wqe = NULL;
int ret = 0;
@@ -548,17 +547,7 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
/* Memory barrier */
wmb();
- rq_db.byte_4 = 0;
- rq_db.parameter = 0;
-
- roce_set_field(rq_db.byte_4, V2_DB_BYTE_4_TAG_M,
- V2_DB_BYTE_4_TAG_S, hr_qp->qpn);
- roce_set_field(rq_db.byte_4, V2_DB_BYTE_4_CMD_M,
- V2_DB_BYTE_4_CMD_S, HNS_ROCE_V2_RQ_DB);
- roce_set_field(rq_db.parameter, V2_DB_PARAMETER_CONS_IDX_M,
- V2_DB_PARAMETER_CONS_IDX_S, hr_qp->rq.head);
-
- hns_roce_write64_k((__be32 *)&rq_db, hr_qp->rq.db_reg_l);
+ *hr_qp->rdb.db_record = hr_qp->rq.head & 0xffff;
}
spin_unlock_irqrestore(&hr_qp->rq.lock, flags);
@@ -3461,6 +3450,8 @@ static int hns_roce_v2_destroy_qp_common(struct hns_roce_dev *hr_dev,
kfree(hr_qp->sq.wrid);
kfree(hr_qp->rq.wrid);
hns_roce_buf_free(hr_dev, hr_qp->buff_size, &hr_qp->hr_buf);
+ if (hr_qp->rq.wqe_cnt)
+ hns_roce_free_db(hr_dev, &hr_qp->rdb);
}
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RQ_INLINE) {
diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
index dd7d882..7f4dd22d 100644
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -665,6 +665,11 @@ static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
spin_lock_init(&hr_dev->sm_lock);
spin_lock_init(&hr_dev->bt_cmd_lock);
+ if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) {
+ INIT_LIST_HEAD(&hr_dev->pgdir_list);
+ mutex_init(&hr_dev->pgdir_mutex);
+ }
+
ret = hns_roce_init_uar_table(hr_dev);
if (ret) {
dev_err(dev, "Failed to initialize uar table. aborting\n");
diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c
index 2bb9cae..2d2c12b 100644
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -645,6 +645,16 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
hr_qp->rq.db_reg_l = hr_dev->reg_base + hr_dev->odb_offset +
DB_REG_OFFSET * hr_dev->priv_uar.index;
+ if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
+ hns_roce_qp_has_rq(init_attr)) {
+ ret = hns_roce_alloc_db(hr_dev, &hr_qp->rdb, 0);
+ if (ret) {
+ dev_err(dev, "rq record doorbell alloc failed!\n");
+ goto err_rq_sge_list;
+ }
+ *hr_qp->rdb.db_record = 0;
+ }
+
/* Allocate QP buf */
page_shift = PAGE_SHIFT + hr_dev->caps.mtt_buf_pg_sz;
if (hns_roce_buf_alloc(hr_dev, hr_qp->buff_size,
@@ -652,7 +662,7 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
&hr_qp->hr_buf, page_shift)) {
dev_err(dev, "hns_roce_buf_alloc error!\n");
ret = -ENOMEM;
- goto err_rq_sge_list;
+ goto err_db;
}
hr_qp->mtt.mtt_type = MTT_TYPE_WQE;
@@ -760,6 +770,11 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
else
hns_roce_buf_free(hr_dev, hr_qp->buff_size, &hr_qp->hr_buf);
+err_db:
+ if (!ib_pd->uobject && hns_roce_qp_has_rq(init_attr) &&
+ (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB))
+ hns_roce_free_db(hr_dev, &hr_qp->rdb);
+
err_rq_sge_list:
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RQ_INLINE)
if (hr_qp->rq_inl_buf.wqe_list) {
--
1.9.1
--
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