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Date: Mon, 25 Jun 2012 19:49:43 +0200
From: sjur.brandeland@...ricsson.com
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, sjurbren@...il.com,
Sjur Brændeland <sjur.brandeland@...ricsson.com>
Subject: [net-next 11/11] caif-hsi: Remove use of module parameters
From: Sjur Brændeland <sjur.brandeland@...ricsson.com>
Remove use of module parameters on caif hsi device, as
rtnl configuration parameters are already supported.
All caif hsi configuration data is put in cfhsi_config,
and default values in hsi_default_config.
Signed-off-by: Sjur Brændeland <sjur.brandeland@...ricsson.com>
---
drivers/net/caif/caif_hsi.c | 151 ++++++++++++++++++++----------------------
include/net/caif/caif_hsi.h | 14 +++-
2 files changed, 82 insertions(+), 83 deletions(-)
diff --git a/drivers/net/caif/caif_hsi.c b/drivers/net/caif/caif_hsi.c
index 0927c10..1c2bd01 100644
--- a/drivers/net/caif/caif_hsi.c
+++ b/drivers/net/caif/caif_hsi.c
@@ -32,51 +32,39 @@ MODULE_DESCRIPTION("CAIF HSI driver");
#define PAD_POW2(x, pow) ((((x)&((pow)-1)) == 0) ? 0 :\
(((pow)-((x)&((pow)-1)))))
-static int inactivity_timeout = 1000;
-module_param(inactivity_timeout, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(inactivity_timeout, "Inactivity timeout on HSI, ms.");
+static const struct cfhsi_config hsi_default_config = {
-static int aggregation_timeout = 1;
-module_param(aggregation_timeout, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(aggregation_timeout, "Aggregation timeout on HSI, ms.");
+ /* Inactivity timeout on HSI, ms */
+ .inactivity_timeout = HZ,
-/*
- * HSI padding options.
- * Warning: must be a base of 2 (& operation used) and can not be zero !
- */
-static int hsi_head_align = 4;
-module_param(hsi_head_align, int, S_IRUGO);
-MODULE_PARM_DESC(hsi_head_align, "HSI head alignment.");
+ /* Aggregation timeout (ms) of zero means no aggregation is done*/
+ .aggregation_timeout = 1,
-static int hsi_tail_align = 4;
-module_param(hsi_tail_align, int, S_IRUGO);
-MODULE_PARM_DESC(hsi_tail_align, "HSI tail alignment.");
-
-/*
- * HSI link layer flowcontrol thresholds.
- * Warning: A high threshold value migth increase throughput but it will at
- * the same time prevent channel prioritization and increase the risk of
- * flooding the modem. The high threshold should be above the low.
- */
-static int hsi_high_threshold = 100;
-module_param(hsi_high_threshold, int, S_IRUGO);
-MODULE_PARM_DESC(hsi_high_threshold, "HSI high threshold (FLOW OFF).");
+ /*
+ * HSI link layer flow-control thresholds.
+ * Threshold values for the HSI packet queue. Flow-control will be
+ * asserted when the number of packets exceeds q_high_mark. It will
+ * not be de-asserted before the number of packets drops below
+ * q_low_mark.
+ * Warning: A high threshold value might increase throughput but it
+ * will at the same time prevent channel prioritization and increase
+ * the risk of flooding the modem. The high threshold should be above
+ * the low.
+ */
+ .q_high_mark = 100,
+ .q_low_mark = 50,
-static int hsi_low_threshold = 50;
-module_param(hsi_low_threshold, int, S_IRUGO);
-MODULE_PARM_DESC(hsi_low_threshold, "HSI high threshold (FLOW ON).");
+ /*
+ * HSI padding options.
+ * Warning: must be a base of 2 (& operation used) and can not be zero !
+ */
+ .head_align = 4,
+ .tail_align = 4,
+};
#define ON 1
#define OFF 0
-/*
- * Threshold values for the HSI packet queue. Flowcontrol will be asserted
- * when the number of packets exceeds HIGH_WATER_MARK. It will not be
- * de-asserted before the number of packets drops below LOW_WATER_MARK.
- */
-#define LOW_WATER_MARK hsi_low_threshold
-#define HIGH_WATER_MARK hsi_high_threshold
-
static LIST_HEAD(cfhsi_list);
static void cfhsi_inactivity_tout(unsigned long arg)
@@ -99,8 +87,8 @@ static void cfhsi_update_aggregation_stats(struct cfhsi *cfhsi,
int hpad, tpad, len;
info = (struct caif_payload_info *)&skb->cb;
- hpad = 1 + PAD_POW2((info->hdr_len + 1), hsi_head_align);
- tpad = PAD_POW2((skb->len + hpad), hsi_tail_align);
+ hpad = 1 + PAD_POW2((info->hdr_len + 1), cfhsi->cfg.head_align);
+ tpad = PAD_POW2((skb->len + hpad), cfhsi->cfg.tail_align);
len = skb->len + hpad + tpad;
if (direction > 0)
@@ -113,7 +101,7 @@ static bool cfhsi_can_send_aggregate(struct cfhsi *cfhsi)
{
int i;
- if (cfhsi->aggregation_timeout == 0)
+ if (cfhsi->cfg.aggregation_timeout == 0)
return true;
for (i = 0; i < CFHSI_PRIO_BEBK; ++i) {
@@ -169,7 +157,7 @@ static void cfhsi_abort_tx(struct cfhsi *cfhsi)
cfhsi->tx_state = CFHSI_TX_STATE_IDLE;
if (!test_bit(CFHSI_SHUTDOWN, &cfhsi->bits))
mod_timer(&cfhsi->inactivity_timer,
- jiffies + cfhsi->inactivity_timeout);
+ jiffies + cfhsi->cfg.inactivity_timeout);
spin_unlock_bh(&cfhsi->lock);
}
@@ -250,8 +238,8 @@ static int cfhsi_tx_frm(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
/* Calculate needed head alignment and tail alignment. */
info = (struct caif_payload_info *)&skb->cb;
- hpad = 1 + PAD_POW2((info->hdr_len + 1), hsi_head_align);
- tpad = PAD_POW2((skb->len + hpad), hsi_tail_align);
+ hpad = 1 + PAD_POW2((info->hdr_len + 1), cfhsi->cfg.head_align);
+ tpad = PAD_POW2((skb->len + hpad), cfhsi->cfg.tail_align);
/* Check if frame still fits with added alignment. */
if ((skb->len + hpad + tpad) <= CFHSI_MAX_EMB_FRM_SZ) {
@@ -292,8 +280,8 @@ static int cfhsi_tx_frm(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
/* Calculate needed head alignment and tail alignment. */
info = (struct caif_payload_info *)&skb->cb;
- hpad = 1 + PAD_POW2((info->hdr_len + 1), hsi_head_align);
- tpad = PAD_POW2((skb->len + hpad), hsi_tail_align);
+ hpad = 1 + PAD_POW2((info->hdr_len + 1), cfhsi->cfg.head_align);
+ tpad = PAD_POW2((skb->len + hpad), cfhsi->cfg.tail_align);
/* Fill in CAIF frame length in descriptor. */
desc->cffrm_len[nfrms] = hpad + skb->len + tpad;
@@ -364,7 +352,7 @@ static void cfhsi_start_tx(struct cfhsi *cfhsi)
cfhsi->tx_state = CFHSI_TX_STATE_IDLE;
/* Start inactivity timer. */
mod_timer(&cfhsi->inactivity_timer,
- jiffies + cfhsi->inactivity_timeout);
+ jiffies + cfhsi->cfg.inactivity_timeout);
spin_unlock_bh(&cfhsi->lock);
break;
}
@@ -390,7 +378,7 @@ static void cfhsi_tx_done(struct cfhsi *cfhsi)
*/
spin_lock_bh(&cfhsi->lock);
if (cfhsi->flow_off_sent &&
- cfhsi_tx_queue_len(cfhsi) <= cfhsi->q_low_mark &&
+ cfhsi_tx_queue_len(cfhsi) <= cfhsi->cfg.q_low_mark &&
cfhsi->cfdev.flowctrl) {
cfhsi->flow_off_sent = 0;
@@ -402,7 +390,7 @@ static void cfhsi_tx_done(struct cfhsi *cfhsi)
cfhsi_start_tx(cfhsi);
} else {
mod_timer(&cfhsi->aggregation_timer,
- jiffies + cfhsi->aggregation_timeout);
+ jiffies + cfhsi->cfg.aggregation_timeout);
spin_unlock_bh(&cfhsi->lock);
}
@@ -645,7 +633,7 @@ static void cfhsi_rx_done(struct cfhsi *cfhsi)
/* Update inactivity timer if pending. */
spin_lock_bh(&cfhsi->lock);
mod_timer_pending(&cfhsi->inactivity_timer,
- jiffies + cfhsi->inactivity_timeout);
+ jiffies + cfhsi->cfg.inactivity_timeout);
spin_unlock_bh(&cfhsi->lock);
if (cfhsi->rx_state.state == CFHSI_RX_STATE_DESC) {
@@ -880,7 +868,7 @@ wake_ack:
__func__);
/* Start inactivity timer. */
mod_timer(&cfhsi->inactivity_timer,
- jiffies + cfhsi->inactivity_timeout);
+ jiffies + cfhsi->cfg.inactivity_timeout);
spin_unlock_bh(&cfhsi->lock);
return;
}
@@ -1071,7 +1059,7 @@ static int cfhsi_xmit(struct sk_buff *skb, struct net_device *dev)
/* Send flow off if number of packets is above high water mark. */
if (!cfhsi->flow_off_sent &&
- cfhsi_tx_queue_len(cfhsi) > cfhsi->q_high_mark &&
+ cfhsi_tx_queue_len(cfhsi) > cfhsi->cfg.q_high_mark &&
cfhsi->cfdev.flowctrl) {
cfhsi->flow_off_sent = 1;
cfhsi->cfdev.flowctrl(cfhsi->ndev, OFF);
@@ -1143,6 +1131,7 @@ static void cfhsi_setup(struct net_device *dev)
cfhsi->cfdev.use_stx = false;
cfhsi->cfdev.use_fcs = false;
cfhsi->ndev = dev;
+ cfhsi->cfg = hsi_default_config;
}
static int cfhsi_open(struct net_device *ndev)
@@ -1158,9 +1147,6 @@ static int cfhsi_open(struct net_device *ndev)
/* Set flow info */
cfhsi->flow_off_sent = 0;
- cfhsi->q_low_mark = LOW_WATER_MARK;
- cfhsi->q_high_mark = HIGH_WATER_MARK;
-
/*
* Allocate a TX buffer with the size of a HSI packet descriptors
@@ -1188,20 +1174,8 @@ static int cfhsi_open(struct net_device *ndev)
goto err_alloc_rx_flip;
}
- /* Pre-calculate inactivity timeout. */
- if (inactivity_timeout != -1) {
- cfhsi->inactivity_timeout =
- inactivity_timeout * HZ / 1000;
- if (!cfhsi->inactivity_timeout)
- cfhsi->inactivity_timeout = 1;
- else if (cfhsi->inactivity_timeout > NEXT_TIMER_MAX_DELTA)
- cfhsi->inactivity_timeout = NEXT_TIMER_MAX_DELTA;
- } else {
- cfhsi->inactivity_timeout = NEXT_TIMER_MAX_DELTA;
- }
-
/* Initialize aggregation timeout */
- cfhsi->aggregation_timeout = aggregation_timeout;
+ cfhsi->cfg.aggregation_timeout = hsi_default_config.aggregation_timeout;
/* Initialize recieve vaiables. */
cfhsi->rx_ptr = cfhsi->rx_buf;
@@ -1350,24 +1324,39 @@ static void cfhsi_netlink_parms(struct nlattr *data[], struct cfhsi *cfhsi)
}
i = __IFLA_CAIF_HSI_INACTIVITY_TOUT;
- if (data[i])
- inactivity_timeout = nla_get_u32(data[i]);
+ /*
+ * Inactivity timeout in millisecs. Lowest possible value is 1,
+ * and highest possible is NEXT_TIMER_MAX_DELTA.
+ */
+ if (data[i]) {
+ u32 inactivity_timeout = nla_get_u32(data[i]);
+ /* Pre-calculate inactivity timeout. */
+ cfhsi->cfg.inactivity_timeout = inactivity_timeout * HZ / 1000;
+ if (cfhsi->cfg.inactivity_timeout == 0)
+ cfhsi->cfg.inactivity_timeout = 1;
+ else if (cfhsi->cfg.inactivity_timeout > NEXT_TIMER_MAX_DELTA)
+ cfhsi->cfg.inactivity_timeout = NEXT_TIMER_MAX_DELTA;
+ }
i = __IFLA_CAIF_HSI_AGGREGATION_TOUT;
if (data[i])
- aggregation_timeout = nla_get_u32(data[i]);
+ cfhsi->cfg.aggregation_timeout = nla_get_u32(data[i]);
i = __IFLA_CAIF_HSI_HEAD_ALIGN;
if (data[i])
- hsi_head_align = nla_get_u32(data[i]);
+ cfhsi->cfg.head_align = nla_get_u32(data[i]);
i = __IFLA_CAIF_HSI_TAIL_ALIGN;
if (data[i])
- hsi_tail_align = nla_get_u32(data[i]);
+ cfhsi->cfg.tail_align = nla_get_u32(data[i]);
i = __IFLA_CAIF_HSI_QHIGH_WATERMARK;
if (data[i])
- hsi_high_threshold = nla_get_u32(data[i]);
+ cfhsi->cfg.q_high_mark = nla_get_u32(data[i]);
+
+ i = __IFLA_CAIF_HSI_QLOW_WATERMARK;
+ if (data[i])
+ cfhsi->cfg.q_low_mark = nla_get_u32(data[i]);
}
static int caif_hsi_changelink(struct net_device *dev, struct nlattr *tb[],
@@ -1398,16 +1387,20 @@ static size_t caif_hsi_get_size(const struct net_device *dev)
static int caif_hsi_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
+ struct cfhsi *cfhsi = netdev_priv(dev);
+
if (nla_put_u32(skb, __IFLA_CAIF_HSI_INACTIVITY_TOUT,
- inactivity_timeout) ||
+ cfhsi->cfg.inactivity_timeout) ||
nla_put_u32(skb, __IFLA_CAIF_HSI_AGGREGATION_TOUT,
- aggregation_timeout) ||
- nla_put_u32(skb, __IFLA_CAIF_HSI_HEAD_ALIGN, hsi_head_align) ||
- nla_put_u32(skb, __IFLA_CAIF_HSI_TAIL_ALIGN, hsi_tail_align) ||
+ cfhsi->cfg.aggregation_timeout) ||
+ nla_put_u32(skb, __IFLA_CAIF_HSI_HEAD_ALIGN,
+ cfhsi->cfg.head_align) ||
+ nla_put_u32(skb, __IFLA_CAIF_HSI_TAIL_ALIGN,
+ cfhsi->cfg.tail_align) ||
nla_put_u32(skb, __IFLA_CAIF_HSI_QHIGH_WATERMARK,
- hsi_high_threshold) ||
+ cfhsi->cfg.q_high_mark) ||
nla_put_u32(skb, __IFLA_CAIF_HSI_QLOW_WATERMARK,
- hsi_low_threshold))
+ cfhsi->cfg.q_low_mark))
return -EMSGSIZE;
return 0;
diff --git a/include/net/caif/caif_hsi.h b/include/net/caif/caif_hsi.h
index 6dc7dc2..bcb9cc3 100644
--- a/include/net/caif/caif_hsi.h
+++ b/include/net/caif/caif_hsi.h
@@ -132,6 +132,15 @@ enum {
CFHSI_PRIO_LAST,
};
+struct cfhsi_config {
+ u32 inactivity_timeout;
+ u32 aggregation_timeout;
+ u32 head_align;
+ u32 tail_align;
+ u32 q_high_mark;
+ u32 q_low_mark;
+};
+
/* Structure implemented by CAIF HSI drivers. */
struct cfhsi {
struct caif_dev_common cfdev;
@@ -142,7 +151,7 @@ struct cfhsi {
struct cfhsi_ops *ops;
int tx_state;
struct cfhsi_rx_state rx_state;
- unsigned long inactivity_timeout;
+ struct cfhsi_config cfg;
int rx_len;
u8 *rx_ptr;
u8 *tx_buf;
@@ -150,8 +159,6 @@ struct cfhsi {
u8 *rx_flip_buf;
spinlock_t lock;
int flow_off_sent;
- u32 q_low_mark;
- u32 q_high_mark;
struct list_head list;
struct work_struct wake_up_work;
struct work_struct wake_down_work;
@@ -164,7 +171,6 @@ struct cfhsi {
struct timer_list rx_slowpath_timer;
/* TX aggregation */
- unsigned long aggregation_timeout;
int aggregation_len;
struct timer_list aggregation_timer;
--
1.7.5.4
--
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