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Date: Mon, 11 Feb 2019 05:47:37 -0800
From: Steve deRosier <derosier@...il.com>
To: Lubomir Rintel <lkundrak@...sk>
Cc: Kalle Valo <kvalo@...eaurora.org>,
"David S. Miller" <davem@...emloft.net>,
linux-wireless <linux-wireless@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] libertas_tf: move hardware callbacks to a separate structure
On Sun, Feb 10, 2019 at 11:52 AM Lubomir Rintel <lkundrak@...sk> wrote:
>
> We'll need to talk to the firmware to get a hardware address before
> device is registered with ieee80211 subsystem at the end of
> lbtf_add_card(). Hooking the callbacks after that is too late.
>
> Signed-off-by: Lubomir Rintel <lkundrak@...sk>
> ---
> drivers/net/wireless/marvell/libertas_tf/cmd.c | 2 +-
> .../net/wireless/marvell/libertas_tf/if_usb.c | 12 +++++++-----
> .../wireless/marvell/libertas_tf/libertas_tf.h | 17 +++++++++++------
> drivers/net/wireless/marvell/libertas_tf/main.c | 10 ++++++----
> 4 files changed, 25 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/net/wireless/marvell/libertas_tf/cmd.c b/drivers/net/wireless/marvell/libertas_tf/cmd.c
> index 64b147dd2432..130f578daafd 100644
> --- a/drivers/net/wireless/marvell/libertas_tf/cmd.c
> +++ b/drivers/net/wireless/marvell/libertas_tf/cmd.c
> @@ -256,7 +256,7 @@ static void lbtf_submit_command(struct lbtf_private *priv,
> command, le16_to_cpu(cmd->seqnum), cmdsize);
> lbtf_deb_hex(LBTF_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
>
> - ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
> + ret = priv->ops->hw_host_to_card(priv, MVMS_CMD, (u8 *)cmd, cmdsize);
> spin_unlock_irqrestore(&priv->driver_lock, flags);
>
> if (ret) {
> diff --git a/drivers/net/wireless/marvell/libertas_tf/if_usb.c b/drivers/net/wireless/marvell/libertas_tf/if_usb.c
> index 6ede6168bd85..7a5a1a85dcf7 100644
> --- a/drivers/net/wireless/marvell/libertas_tf/if_usb.c
> +++ b/drivers/net/wireless/marvell/libertas_tf/if_usb.c
> @@ -131,6 +131,12 @@ static void if_usb_fw_timeo(struct timer_list *t)
> lbtf_deb_leave(LBTF_DEB_USB);
> }
>
> +static const struct lbtf_ops if_usb_ops = {
> + .hw_host_to_card = if_usb_host_to_card,
> + .hw_prog_firmware = if_usb_prog_firmware,
> + .hw_reset_device = if_usb_reset_device,
> +};
> +
> /**
> * if_usb_probe - sets the configuration values
> *
> @@ -216,15 +222,11 @@ static int if_usb_probe(struct usb_interface *intf,
> goto dealloc;
> }
>
> - priv = lbtf_add_card(cardp, &udev->dev);
> + priv = lbtf_add_card(cardp, &udev->dev, &if_usb_ops);
> if (!priv)
> goto dealloc;
>
> cardp->priv = priv;
> -
> - priv->hw_host_to_card = if_usb_host_to_card;
> - priv->hw_prog_firmware = if_usb_prog_firmware;
> - priv->hw_reset_device = if_usb_reset_device;
> cardp->boot2_version = udev->descriptor.bcdDevice;
>
> usb_get_dev(udev);
> diff --git a/drivers/net/wireless/marvell/libertas_tf/libertas_tf.h b/drivers/net/wireless/marvell/libertas_tf/libertas_tf.h
> index ad77b92d0b41..11d5ff68bc5e 100644
> --- a/drivers/net/wireless/marvell/libertas_tf/libertas_tf.h
> +++ b/drivers/net/wireless/marvell/libertas_tf/libertas_tf.h
> @@ -173,10 +173,19 @@ struct channel_range {
>
> struct if_usb_card;
>
> +struct lbtf_ops {
> + /** Hardware access */
> + int (*hw_host_to_card)(struct lbtf_private *priv, u8 type,
> + u8 *payload, u16 nb);
> + int (*hw_prog_firmware)(struct if_usb_card *cardp);
> + int (*hw_reset_device)(struct if_usb_card *cardp);
> +};
> +
> /** Private structure for the MV device */
> struct lbtf_private {
> void *card;
> struct ieee80211_hw *hw;
> + const struct lbtf_ops *ops;
>
> /* Command response buffer */
> u8 cmd_resp_buff[LBS_UPLD_SIZE];
> @@ -188,11 +197,6 @@ struct lbtf_private {
>
> struct work_struct cmd_work;
> struct work_struct tx_work;
> - /** Hardware access */
> - int (*hw_host_to_card) (struct lbtf_private *priv, u8 type, u8 *payload, u16 nb);
> - int (*hw_prog_firmware) (struct if_usb_card *cardp);
> - int (*hw_reset_device) (struct if_usb_card *cardp);
> -
>
> /** Wlan adapter data structure*/
> /** STATUS variables */
> @@ -486,7 +490,8 @@ void lbtf_cmd_response_rx(struct lbtf_private *priv);
> /* main.c */
> struct chan_freq_power *lbtf_get_region_cfp_table(u8 region,
> int *cfp_no);
> -struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev);
> +struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,
> + const struct lbtf_ops *ops);
> int lbtf_remove_card(struct lbtf_private *priv);
> int lbtf_start_card(struct lbtf_private *priv);
> int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb);
> diff --git a/drivers/net/wireless/marvell/libertas_tf/main.c b/drivers/net/wireless/marvell/libertas_tf/main.c
> index f93b400db949..8ed3cd158cf5 100644
> --- a/drivers/net/wireless/marvell/libertas_tf/main.c
> +++ b/drivers/net/wireless/marvell/libertas_tf/main.c
> @@ -281,7 +281,7 @@ static void lbtf_tx_work(struct work_struct *work)
> BUG_ON(priv->tx_skb);
> spin_lock_irq(&priv->driver_lock);
> priv->tx_skb = skb;
> - err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
> + err = priv->ops->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
> spin_unlock_irq(&priv->driver_lock);
> if (err) {
> dev_kfree_skb_any(skb);
> @@ -301,7 +301,7 @@ static int lbtf_op_start(struct ieee80211_hw *hw)
>
> if (!priv->fw_ready)
> /* Upload firmware */
> - if (priv->hw_prog_firmware(card))
> + if (priv->ops->hw_prog_firmware(card))
> goto err_prog_firmware;
>
> /* poke the firmware */
> @@ -322,7 +322,7 @@ static int lbtf_op_start(struct ieee80211_hw *hw)
> return 0;
>
> err_prog_firmware:
> - priv->hw_reset_device(card);
> + priv->ops->hw_reset_device(card);
> lbtf_deb_leave_args(LBTF_DEB_MACOPS, "error programming fw; ret=%d", ret);
> return ret;
> }
> @@ -605,7 +605,8 @@ EXPORT_SYMBOL_GPL(lbtf_rx);
> *
> * Returns: pointer to struct lbtf_priv.
> */
> -struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
> +struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,
> + const struct lbtf_ops *ops)
> {
> struct ieee80211_hw *hw;
> struct lbtf_private *priv = NULL;
> @@ -622,6 +623,7 @@ struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
>
> priv->hw = hw;
> priv->card = card;
> + priv->ops = ops;
> priv->tx_skb = NULL;
>
> hw->queues = 1;
> --
> 2.20.1
>
Reviewed-by: Steve deRosier <derosier@...-sierra.com>
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