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Date: Mon, 1 Jun 2015 16:09:39 -0400
From: Andy Gospodarek <gospo@...ulusnetworks.com>
To: Simon Horman <simon.horman@...ronome.com>
Cc: Scott Feldman <sfeldma@...il.com>, Jiri Pirko <jiri@...nulli.us>,
David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2] rocker: remove rocker parameter from
functions that have rocker_port parameter
On Mon, Jun 01, 2015 at 01:25:04PM +0900, Simon Horman wrote:
> The rocker (switch) of a rocker_port may be trivially obtained from
> the latter it seems cleaner not to pass the former to a function when
> the latter is being passed anyway.
Excellent idea and commonly used in many other hardware drivers.
>
> rocker_port_rx_proc() is omitted from this change as it is a hot path case.
>
> Signed-off-by: Simon Horman <simon.horman@...ronome.com>
> Acked-by: Scott Feldman <sfeldma@...il.com>
Acked-by: Andy Gospodarek <gospo@...ulusnetworks.com>
>
> ---
> v2
> * Dropped RFC designation
> * Omit rocker_port_rx_proc() from this change as it is a hot path case,
> as suggested by Scott Feldman
> * Added Scott Feldman's Ack
> ---
> drivers/net/ethernet/rocker/rocker.c | 115 ++++++++++++++---------------------
> 1 file changed, 45 insertions(+), 70 deletions(-)
>
> diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
> index 36f7edfc3c7a..d246647b3653 100644
> --- a/drivers/net/ethernet/rocker/rocker.c
> +++ b/drivers/net/ethernet/rocker/rocker.c
> @@ -1172,11 +1172,11 @@ static void rocker_dma_rings_fini(struct rocker *rocker)
> rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
> }
>
> -static int rocker_dma_rx_ring_skb_map(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> struct sk_buff *skb, size_t buf_len)
> {
> + const struct rocker *rocker = rocker_port->rocker;
> struct pci_dev *pdev = rocker->pdev;
> dma_addr_t dma_handle;
>
> @@ -1201,8 +1201,7 @@ static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
> return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
> }
>
> -static int rocker_dma_rx_ring_skb_alloc(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info)
> {
> struct net_device *dev = rocker_port->dev;
> @@ -1219,8 +1218,7 @@ static int rocker_dma_rx_ring_skb_alloc(const struct rocker *rocker,
> skb = netdev_alloc_skb_ip_align(dev, buf_len);
> if (!skb)
> return -ENOMEM;
> - err = rocker_dma_rx_ring_skb_map(rocker, rocker_port, desc_info,
> - skb, buf_len);
> + err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
> if (err) {
> dev_kfree_skb_any(skb);
> return err;
> @@ -1257,15 +1255,15 @@ static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
> dev_kfree_skb_any(skb);
> }
>
> -static int rocker_dma_rx_ring_skbs_alloc(const struct rocker *rocker,
> - const struct rocker_port *rocker_port)
> +static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
> {
> const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
> + const struct rocker *rocker = rocker_port->rocker;
> int i;
> int err;
>
> for (i = 0; i < rx_ring->size; i++) {
> - err = rocker_dma_rx_ring_skb_alloc(rocker, rocker_port,
> + err = rocker_dma_rx_ring_skb_alloc(rocker_port,
> &rx_ring->desc_info[i]);
> if (err)
> goto rollback;
> @@ -1278,10 +1276,10 @@ rollback:
> return err;
> }
>
> -static void rocker_dma_rx_ring_skbs_free(const struct rocker *rocker,
> - const struct rocker_port *rocker_port)
> +static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
> {
> const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
> + const struct rocker *rocker = rocker_port->rocker;
> int i;
>
> for (i = 0; i < rx_ring->size; i++)
> @@ -1327,7 +1325,7 @@ static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
> goto err_dma_rx_ring_bufs_alloc;
> }
>
> - err = rocker_dma_rx_ring_skbs_alloc(rocker, rocker_port);
> + err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
> if (err) {
> netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
> goto err_dma_rx_ring_skbs_alloc;
> @@ -1353,7 +1351,7 @@ static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
> {
> struct rocker *rocker = rocker_port->rocker;
>
> - rocker_dma_rx_ring_skbs_free(rocker, rocker_port);
> + rocker_dma_rx_ring_skbs_free(rocker_port);
> rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
> PCI_DMA_BIDIRECTIONAL);
> rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
> @@ -1588,22 +1586,20 @@ static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
> * Command interface
> ********************/
>
> -typedef int (*rocker_cmd_prep_cb_t)(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +typedef int (*rocker_cmd_prep_cb_t)(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv);
>
> -typedef int (*rocker_cmd_proc_cb_t)(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +typedef int (*rocker_cmd_proc_cb_t)(const struct rocker_port *rocker_port,
> const struct rocker_desc_info *desc_info,
> void *priv);
>
> -static int rocker_cmd_exec(struct rocker *rocker,
> - struct rocker_port *rocker_port,
> +static int rocker_cmd_exec(struct rocker_port *rocker_port,
> enum switchdev_trans trans,
> rocker_cmd_prep_cb_t prepare, void *prepare_priv,
> rocker_cmd_proc_cb_t process, void *process_priv)
> {
> + struct rocker *rocker = rocker_port->rocker;
> struct rocker_desc_info *desc_info;
> struct rocker_wait *wait;
> unsigned long flags;
> @@ -1622,7 +1618,7 @@ static int rocker_cmd_exec(struct rocker *rocker,
> goto out;
> }
>
> - err = prepare(rocker, rocker_port, desc_info, prepare_priv);
> + err = prepare(rocker_port, desc_info, prepare_priv);
> if (err) {
> spin_unlock_irqrestore(&rocker->cmd_ring_lock, flags);
> goto out;
> @@ -1644,7 +1640,7 @@ static int rocker_cmd_exec(struct rocker *rocker,
> return err;
>
> if (process)
> - err = process(rocker, rocker_port, desc_info, process_priv);
> + err = process(rocker_port, desc_info, process_priv);
>
> rocker_desc_gen_clear(desc_info);
> out:
> @@ -1653,8 +1649,7 @@ out:
> }
>
> static int
> -rocker_cmd_get_port_settings_prep(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -1674,8 +1669,7 @@ rocker_cmd_get_port_settings_prep(const struct rocker *rocker,
> }
>
> static int
> -rocker_cmd_get_port_settings_ethtool_proc(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
> const struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -1713,8 +1707,7 @@ rocker_cmd_get_port_settings_ethtool_proc(const struct rocker *rocker,
> }
>
> static int
> -rocker_cmd_get_port_settings_macaddr_proc(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
> const struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -1746,8 +1739,7 @@ struct port_name {
> };
>
> static int
> -rocker_cmd_get_port_settings_phys_name_proc(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
> const struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -1788,8 +1780,7 @@ rocker_cmd_get_port_settings_phys_name_proc(const struct rocker *rocker,
> }
>
> static int
> -rocker_cmd_set_port_settings_ethtool_prep(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -1819,8 +1810,7 @@ rocker_cmd_set_port_settings_ethtool_prep(const struct rocker *rocker,
> }
>
> static int
> -rocker_cmd_set_port_settings_macaddr_prep(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -1844,8 +1834,7 @@ rocker_cmd_set_port_settings_macaddr_prep(const struct rocker *rocker,
> }
>
> static int
> -rocker_cmd_set_port_learning_prep(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -1870,8 +1859,7 @@ rocker_cmd_set_port_learning_prep(const struct rocker *rocker,
> static int rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
> struct ethtool_cmd *ecmd)
> {
> - return rocker_cmd_exec(rocker_port->rocker, rocker_port,
> - SWITCHDEV_TRANS_NONE,
> + return rocker_cmd_exec(rocker_port, SWITCHDEV_TRANS_NONE,
> rocker_cmd_get_port_settings_prep, NULL,
> rocker_cmd_get_port_settings_ethtool_proc,
> ecmd);
> @@ -1880,8 +1868,7 @@ static int rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
> static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
> unsigned char *macaddr)
> {
> - return rocker_cmd_exec(rocker_port->rocker, rocker_port,
> - SWITCHDEV_TRANS_NONE,
> + return rocker_cmd_exec(rocker_port, SWITCHDEV_TRANS_NONE,
> rocker_cmd_get_port_settings_prep, NULL,
> rocker_cmd_get_port_settings_macaddr_proc,
> macaddr);
> @@ -1890,8 +1877,7 @@ static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
> static int rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
> struct ethtool_cmd *ecmd)
> {
> - return rocker_cmd_exec(rocker_port->rocker, rocker_port,
> - SWITCHDEV_TRANS_NONE,
> + return rocker_cmd_exec(rocker_port, SWITCHDEV_TRANS_NONE,
> rocker_cmd_set_port_settings_ethtool_prep,
> ecmd, NULL, NULL);
> }
> @@ -1899,8 +1885,7 @@ static int rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
> static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
> unsigned char *macaddr)
> {
> - return rocker_cmd_exec(rocker_port->rocker, rocker_port,
> - SWITCHDEV_TRANS_NONE,
> + return rocker_cmd_exec(rocker_port, SWITCHDEV_TRANS_NONE,
> rocker_cmd_set_port_settings_macaddr_prep,
> macaddr, NULL, NULL);
> }
> @@ -1908,7 +1893,7 @@ static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
> static int rocker_port_set_learning(struct rocker_port *rocker_port,
> enum switchdev_trans trans)
> {
> - return rocker_cmd_exec(rocker_port->rocker, rocker_port, trans,
> + return rocker_cmd_exec(rocker_port, trans,
> rocker_cmd_set_port_learning_prep,
> NULL, NULL, NULL);
> }
> @@ -2114,8 +2099,7 @@ rocker_cmd_flow_tbl_add_acl(struct rocker_desc_info *desc_info,
> return 0;
> }
>
> -static int rocker_cmd_flow_tbl_add(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +static int rocker_cmd_flow_tbl_add(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -2172,8 +2156,7 @@ static int rocker_cmd_flow_tbl_add(const struct rocker *rocker,
> return 0;
> }
>
> -static int rocker_cmd_flow_tbl_del(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +static int rocker_cmd_flow_tbl_del(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -2282,8 +2265,7 @@ rocker_cmd_group_tbl_add_l3_unicast(struct rocker_desc_info *desc_info,
> return 0;
> }
>
> -static int rocker_cmd_group_tbl_add(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +static int rocker_cmd_group_tbl_add(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -2328,8 +2310,7 @@ static int rocker_cmd_group_tbl_add(const struct rocker *rocker,
> return 0;
> }
>
> -static int rocker_cmd_group_tbl_del(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +static int rocker_cmd_group_tbl_del(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -2460,8 +2441,7 @@ static int rocker_flow_tbl_add(struct rocker_port *rocker_port,
>
> spin_unlock_irqrestore(&rocker->flow_tbl_lock, flags);
>
> - return rocker_cmd_exec(rocker, rocker_port, trans,
> - rocker_cmd_flow_tbl_add,
> + return rocker_cmd_exec(rocker_port, trans, rocker_cmd_flow_tbl_add,
> found, NULL, NULL);
> }
>
> @@ -2492,7 +2472,7 @@ static int rocker_flow_tbl_del(struct rocker_port *rocker_port,
> rocker_port_kfree(trans, match);
>
> if (found) {
> - err = rocker_cmd_exec(rocker, rocker_port, trans,
> + err = rocker_cmd_exec(rocker_port, trans,
> rocker_cmd_flow_tbl_del,
> found, NULL, NULL);
> rocker_port_kfree(trans, found);
> @@ -2782,8 +2762,7 @@ static int rocker_group_tbl_add(struct rocker_port *rocker_port,
>
> spin_unlock_irqrestore(&rocker->group_tbl_lock, flags);
>
> - return rocker_cmd_exec(rocker, rocker_port, trans,
> - rocker_cmd_group_tbl_add,
> + return rocker_cmd_exec(rocker_port, trans, rocker_cmd_group_tbl_add,
> found, NULL, NULL);
> }
>
> @@ -2811,7 +2790,7 @@ static int rocker_group_tbl_del(struct rocker_port *rocker_port,
> rocker_group_tbl_entry_free(trans, match);
>
> if (found) {
> - err = rocker_cmd_exec(rocker, rocker_port, trans,
> + err = rocker_cmd_exec(rocker_port, trans,
> rocker_cmd_group_tbl_del,
> found, NULL, NULL);
> rocker_group_tbl_entry_free(trans, found);
> @@ -4219,8 +4198,7 @@ static int rocker_port_get_phys_port_name(struct net_device *dev,
> struct port_name name = { .buf = buf, .len = len };
> int err;
>
> - err = rocker_cmd_exec(rocker_port->rocker, rocker_port,
> - SWITCHDEV_TRANS_NONE,
> + err = rocker_cmd_exec(rocker_port, SWITCHDEV_TRANS_NONE,
> rocker_cmd_get_port_settings_prep, NULL,
> rocker_cmd_get_port_settings_phys_name_proc,
> &name);
> @@ -4600,8 +4578,7 @@ static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
> }
>
> static int
> -rocker_cmd_get_port_stats_prep(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
> struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -4625,8 +4602,7 @@ rocker_cmd_get_port_stats_prep(const struct rocker *rocker,
> }
>
> static int
> -rocker_cmd_get_port_stats_ethtool_proc(const struct rocker *rocker,
> - const struct rocker_port *rocker_port,
> +rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
> const struct rocker_desc_info *desc_info,
> void *priv)
> {
> @@ -4666,8 +4642,7 @@ rocker_cmd_get_port_stats_ethtool_proc(const struct rocker *rocker,
> static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
> void *priv)
> {
> - return rocker_cmd_exec(rocker_port->rocker, rocker_port,
> - SWITCHDEV_TRANS_NONE,
> + return rocker_cmd_exec(rocker_port, SWITCHDEV_TRANS_NONE,
> rocker_cmd_get_port_stats_prep, NULL,
> rocker_cmd_get_port_stats_ethtool_proc,
> priv);
> @@ -4780,7 +4755,7 @@ static int rocker_port_rx_proc(const struct rocker *rocker,
>
> netif_receive_skb(skb);
>
> - return rocker_dma_rx_ring_skb_alloc(rocker, rocker_port, desc_info);
> + return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
> }
>
> static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
> @@ -4858,9 +4833,9 @@ static void rocker_remove_ports(const struct rocker *rocker)
> kfree(rocker->ports);
> }
>
> -static void rocker_port_dev_addr_init(const struct rocker *rocker,
> - struct rocker_port *rocker_port)
> +static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
> {
> + const struct rocker *rocker = rocker_port->rocker;
> const struct pci_dev *pdev = rocker->pdev;
> int err;
>
> @@ -4890,7 +4865,7 @@ static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
> rocker_port->brport_flags = BR_LEARNING | BR_LEARNING_SYNC;
> INIT_LIST_HEAD(&rocker_port->trans_mem);
>
> - rocker_port_dev_addr_init(rocker, rocker_port);
> + rocker_port_dev_addr_init(rocker_port);
> dev->netdev_ops = &rocker_port_netdev_ops;
> dev->ethtool_ops = &rocker_port_ethtool_ops;
> dev->switchdev_ops = &rocker_port_switchdev_ops;
> --
> 2.1.4
>
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