[PATCH openEuler-5.10 055/129] net: hns3: refactor function hns3_get_vector_ring_chain()

From: Jie Wang wangjie125@huawei.com

mainline inclusion from mainline-master commit 1b33341e3dc0 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4M1HB CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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Currently hns3_get_vector_ring_chain() is a bit long. Refactor it by extracting sub process to improve the readability.

Signed-off-by: Jie Wang wangjie125@huawei.com Signed-off-by: Guangbin Huang huangguangbin2@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Reviewed-by: Yongxin Li liyongxin1@huawei.com Signed-off-by: Junxin Chen chenjunxin1@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- .../net/ethernet/hisilicon/hns3/hns3_enet.c | 121 ++++++++---------- 1 file changed, 53 insertions(+), 68 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index aa513567f066..c1444dd93195 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -4341,87 +4341,70 @@ static int hns3_nic_common_poll(struct napi_struct *napi, int budget) return rx_pkt_total; }

-static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector, - struct hnae3_ring_chain_node *head) +static int hns3_create_ring_chain(struct hns3_enet_tqp_vector *tqp_vector, + struct hnae3_ring_chain_node **head, + bool is_tx) { + u32 bit_value = is_tx ? HNAE3_RING_TYPE_TX : HNAE3_RING_TYPE_RX; + u32 field_value = is_tx ? HNAE3_RING_GL_TX : HNAE3_RING_GL_RX; + struct hnae3_ring_chain_node *cur_chain = *head; struct pci_dev *pdev = tqp_vector->handle->pdev; - struct hnae3_ring_chain_node *cur_chain = head; struct hnae3_ring_chain_node *chain; - struct hns3_enet_ring *tx_ring; - struct hns3_enet_ring *rx_ring; - - tx_ring = tqp_vector->tx_group.ring; - if (tx_ring) { - cur_chain->tqp_index = tx_ring->tqp->tqp_index; - hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B, - HNAE3_RING_TYPE_TX); - hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M, - HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX); - - cur_chain->next = NULL; - - while (tx_ring->next) { - tx_ring = tx_ring->next; - - chain = devm_kzalloc(&pdev->dev, sizeof(*chain), - GFP_KERNEL); - if (!chain) - goto err_free_chain; - - cur_chain->next = chain; - chain->tqp_index = tx_ring->tqp->tqp_index; - hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B, - HNAE3_RING_TYPE_TX); - hnae3_set_field(chain->int_gl_idx, - HNAE3_RING_GL_IDX_M, - HNAE3_RING_GL_IDX_S, - HNAE3_RING_GL_TX); - - cur_chain = chain; - } - } + struct hns3_enet_ring *ring;

- rx_ring = tqp_vector->rx_group.ring; - if (!tx_ring && rx_ring) { - cur_chain->next = NULL; - cur_chain->tqp_index = rx_ring->tqp->tqp_index; - hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B, - HNAE3_RING_TYPE_RX); - hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M, - HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX); + ring = is_tx ? tqp_vector->tx_group.ring : tqp_vector->rx_group.ring;

- rx_ring = rx_ring->next; + if (cur_chain) { + while (cur_chain->next) + cur_chain = cur_chain->next; }

- while (rx_ring) { + while (ring) { chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL); if (!chain) - goto err_free_chain; - - cur_chain->next = chain; - chain->tqp_index = rx_ring->tqp->tqp_index; + return -ENOMEM; + if (cur_chain) + cur_chain->next = chain; + else + *head = chain; + chain->tqp_index = ring->tqp->tqp_index; hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B, - HNAE3_RING_TYPE_RX); - hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M, - HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX); + bit_value); + hnae3_set_field(chain->int_gl_idx, + HNAE3_RING_GL_IDX_M, + HNAE3_RING_GL_IDX_S, field_value);

cur_chain = chain;

- rx_ring = rx_ring->next; + ring = ring->next; }

return 0; +} + +static struct hnae3_ring_chain_node * +hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector) +{ + struct pci_dev *pdev = tqp_vector->handle->pdev; + struct hnae3_ring_chain_node *cur_chain = NULL; + struct hnae3_ring_chain_node *chain; + + if (hns3_create_ring_chain(tqp_vector, &cur_chain, true)) + goto err_free_chain; + + if (hns3_create_ring_chain(tqp_vector, &cur_chain, false)) + goto err_free_chain; + + return cur_chain;

err_free_chain: - cur_chain = head->next; while (cur_chain) { chain = cur_chain->next; devm_kfree(&pdev->dev, cur_chain); cur_chain = chain; } - head->next = NULL;

- return -ENOMEM; + return NULL; }

static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector, @@ -4430,7 +4413,7 @@ static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector, struct pci_dev *pdev = tqp_vector->handle->pdev; struct hnae3_ring_chain_node *chain_tmp, *chain;

- chain = head->next; + chain = head;

while (chain) { chain_tmp = chain->next; @@ -4545,7 +4528,7 @@ static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv) }

for (i = 0; i < priv->vector_num; i++) { - struct hnae3_ring_chain_node vector_ring_chain; + struct hnae3_ring_chain_node *vector_ring_chain;

tqp_vector = &priv->tqp_vector[i];

@@ -4555,15 +4538,16 @@ static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv) tqp_vector->tx_group.total_packets = 0; tqp_vector->handle = h;

- ret = hns3_get_vector_ring_chain(tqp_vector, - &vector_ring_chain); - if (ret) + vector_ring_chain = hns3_get_vector_ring_chain(tqp_vector); + if (!vector_ring_chain) { + ret = -ENOMEM; goto map_ring_fail; + }

ret = h->ae_algo->ops->map_ring_to_vector(h, - tqp_vector->vector_irq, &vector_ring_chain); + tqp_vector->vector_irq, vector_ring_chain);

- hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain); + hns3_free_vector_ring_chain(tqp_vector, vector_ring_chain);

if (ret) goto map_ring_fail; @@ -4662,7 +4646,7 @@ static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)

static void hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv) { - struct hnae3_ring_chain_node vector_ring_chain; + struct hnae3_ring_chain_node *vector_ring_chain; struct hnae3_handle *h = priv->ae_handle; struct hns3_enet_tqp_vector *tqp_vector; int i; @@ -4677,13 +4661,14 @@ static void hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv) * chain between vector and ring, we should go on to deal with * the remaining options. */ - if (hns3_get_vector_ring_chain(tqp_vector, &vector_ring_chain)) + vector_ring_chain = hns3_get_vector_ring_chain(tqp_vector); + if (!vector_ring_chain) dev_warn(priv->dev, "failed to get ring chain\n");

h->ae_algo->ops->unmap_ring_from_vector(h, - tqp_vector->vector_irq, &vector_ring_chain); + tqp_vector->vector_irq, vector_ring_chain);

- hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain); + hns3_free_vector_ring_chain(tqp_vector, vector_ring_chain);

hns3_clear_ring_group(&tqp_vector->rx_group); hns3_clear_ring_group(&tqp_vector->tx_group);