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Commit 33e6ada1 authored by Rupesh Gujare's avatar Rupesh Gujare Committed by Greg Kroah-Hartman
Browse files

staging: ozwpan: ISOC transfer in triggered mode 



This patch implements ISOC frame transfer while PD is in
 triggered mode.

Signed-off-by: default avatarRupesh Gujare <rgujare@ozmodevices.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3403cc0f

drivers/staging/ozwpan/ozmain.c

+1 −1
Original line number Diff line number Diff line
@@ -59,6 +59,6 @@ module_exit(ozwpan_exit); 


MODULE_AUTHOR("Chris Kelly");

MODULE_DESCRIPTION("Ozmo Devices USB over WiFi hcd driver");

MODULE_VERSION("1.0.9");

MODULE_VERSION("1.0.10");

MODULE_LICENSE("GPL");

drivers/staging/ozwpan/ozpd.c

+141 −30
Original line number Diff line number Diff line
@@ -24,18 +24,22 @@ 
/*------------------------------------------------------------------------------

 */

#define OZ_MAX_TX_POOL_SIZE	6

/* Maximum number of uncompleted isoc frames that can be pending.

/* Maximum number of uncompleted isoc frames that can be pending in network.

 */

#define OZ_MAX_SUBMITTED_ISOC	16

/* Maximum number of uncompleted isoc frames that can be pending in Tx Queue.

 */

#define OZ_MAX_TX_QUEUE_ISOC	32

/*------------------------------------------------------------------------------

 */

static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd);

static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f);

static void oz_tx_isoc_free(struct oz_pd *pd, struct oz_tx_frame *f);

static struct sk_buff *oz_build_frame(struct oz_pd *pd, struct oz_tx_frame *f);

static int oz_send_isoc_frame(struct oz_pd *pd);

static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f);

static void oz_isoc_stream_free(struct oz_isoc_stream *st);

static int oz_send_next_queued_frame(struct oz_pd *pd, int *more_data);

static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data);

static void oz_isoc_destructor(struct sk_buff *skb);

static int oz_def_app_init(void);

static void oz_def_app_term(void);
@@ -208,6 +212,8 @@ void oz_pd_destroy(struct oz_pd *pd) 
	while (e != &pd->tx_queue) {

		f = container_of(e, struct oz_tx_frame, link);

		e = e->next;

		if (f->skb != NULL)

			kfree_skb(f->skb);

		oz_retire_frame(pd, f);

	}

	oz_elt_buf_term(&pd->elt_buff);
@@ -372,6 +378,23 @@ static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd) 
	}

	return f;

}

/*------------------------------------------------------------------------------

 * Context: softirq or process

 */

static void oz_tx_isoc_free(struct oz_pd *pd, struct oz_tx_frame *f)

{

	pd->nb_queued_isoc_frames--;

	list_del_init(&f->link);

	if (pd->tx_pool_count < OZ_MAX_TX_POOL_SIZE) {

		f->link.next = pd->tx_pool;

		pd->tx_pool = &f->link;

		pd->tx_pool_count++;

	} else {

		kfree(f);

	}

	oz_trace2(OZ_TRACE_TX_FRAMES, "Releasing ISOC Frame isoc_nb= %d\n",

						pd->nb_queued_isoc_frames);

}

/*------------------------------------------------------------------------------

 * Context: softirq or process

 */
@@ -388,6 +411,14 @@ static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f) 
	if (f)

		kfree(f);

}

/*------------------------------------------------------------------------------

 * Context: softirq-serialized

 */

void oz_set_more_bit(struct sk_buff *skb)

{

	struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb);

	oz_hdr->control |= OZ_F_MORE_DATA;

}

/*------------------------------------------------------------------------------

 * Context: softirq

 */
@@ -403,6 +434,7 @@ int oz_prepare_frame(struct oz_pd *pd, int empty) 
	f = oz_tx_frame_alloc(pd);

	if (f == 0)

		return -1;

	f->skb = NULL;

	f->hdr.control =

		(OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT) | OZ_F_ACK_REQUESTED;

	++pd->last_tx_pkt_num;
@@ -486,24 +518,51 @@ static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f) 
/*------------------------------------------------------------------------------

 * Context: softirq-serialized

 */

static int oz_send_next_queued_frame(struct oz_pd *pd, int *more_data)

static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data)

{

	struct sk_buff *skb;

	struct oz_tx_frame *f;

	struct list_head *e;

	*more_data = 0;

	spin_lock(&pd->tx_frame_lock);

	e = pd->last_sent_frame->next;

	if (e == &pd->tx_queue) {

		spin_unlock(&pd->tx_frame_lock);

		return -1;

	}

	pd->last_sent_frame = e;

	if (e->next != &pd->tx_queue)

		*more_data = 1;

	f = container_of(e, struct oz_tx_frame, link);



	if (f->skb != NULL) {

		skb = f->skb;

		oz_tx_isoc_free(pd, f);

		spin_unlock(&pd->tx_frame_lock);

		if (more_data)

			oz_set_more_bit(skb);

		if ((int)atomic_read(&g_submitted_isoc) <

							OZ_MAX_SUBMITTED_ISOC) {

			if (dev_queue_xmit(skb) < 0) {

				oz_trace2(OZ_TRACE_TX_FRAMES,

						"Dropping ISOC Frame\n");

				oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0);

				return -1;

			}

			atomic_inc(&g_submitted_isoc);

			oz_trace2(OZ_TRACE_TX_FRAMES,

					"Sending ISOC Frame, nb_isoc= %d\n",

						pd->nb_queued_isoc_frames);

			return 0;

		} else {

			kfree_skb(skb);

			oz_trace2(OZ_TRACE_TX_FRAMES, "Dropping ISOC Frame>\n");

			oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0);

			return -1;

		}

	}



	pd->last_sent_frame = e;

	skb = oz_build_frame(pd, f);

	spin_unlock(&pd->tx_frame_lock);

	if (more_data)

		oz_set_more_bit(skb);

	oz_trace2(OZ_TRACE_TX_FRAMES, "TX frame PN=0x%x\n", f->hdr.pkt_num);

	if (skb) {

		oz_event_log(OZ_EVT_TX_FRAME,
@@ -512,6 +571,7 @@ static int oz_send_next_queued_frame(struct oz_pd *pd, int *more_data) 
			0, f->hdr.pkt_num);

		if (dev_queue_xmit(skb) < 0)

			return -1;



	}

	return 0;

}
@@ -520,21 +580,38 @@ static int oz_send_next_queued_frame(struct oz_pd *pd, int *more_data) 
 */

void oz_send_queued_frames(struct oz_pd *pd, int backlog)

{

	int more;

	if (backlog <  OZ_MAX_QUEUED_FRAMES) {

		if (oz_send_next_queued_frame(pd, &more) >= 0) {

			while (more && oz_send_next_queued_frame(pd, &more))

				;

		} else {

			if (((pd->mode & OZ_F_ISOC_ANYTIME) == 0)

				|| (pd->isoc_sent == 0)) {

				if (oz_prepare_frame(pd, 1) >= 0)

					oz_send_next_queued_frame(pd, &more);

	while (oz_prepare_frame(pd, 0) >= 0)

		backlog++;



	switch (pd->mode & (OZ_F_ISOC_NO_ELTS | OZ_F_ISOC_ANYTIME)) {



		case OZ_F_ISOC_NO_ELTS: {

			backlog += pd->nb_queued_isoc_frames;

			if (backlog <= 0)

				goto out;

			if (backlog > OZ_MAX_SUBMITTED_ISOC)

				backlog = OZ_MAX_SUBMITTED_ISOC;

			break;

		}

		case OZ_NO_ELTS_ANYTIME: {

			if ((backlog <= 0) && (pd->isoc_sent == 0))

				goto out;

			break;

		}

	} else {

		oz_send_next_queued_frame(pd, &more);

		default: {

			if (backlog <= 0)

				goto out;

			break;

		}

	}

	while (backlog--) {

		if (oz_send_next_queued_frame(pd, backlog) < 0)

			break;

	}

	return;



out:	oz_prepare_frame(pd, 1);

	oz_send_next_queued_frame(pd, 0);

}

/*------------------------------------------------------------------------------

 * Context: softirq
@@ -603,8 +680,10 @@ void oz_retire_tx_frames(struct oz_pd *pd, u8 lpn) 
		f = container_of(e, struct oz_tx_frame, link);

		pkt_num = le32_to_cpu(get_unaligned(&f->hdr.pkt_num));

		diff = (lpn - (pkt_num & OZ_LAST_PN_MASK)) & OZ_LAST_PN_MASK;

		if (diff > OZ_LAST_PN_HALF_CYCLE)

		if ((diff > OZ_LAST_PN_HALF_CYCLE) || (pkt_num == 0))

			break;

		oz_trace2(OZ_TRACE_TX_FRAMES, "Releasing pkt_num= %u, nb= %d\n",

						 pkt_num, pd->nb_queued_frames);

		if (first == 0)

			first = e;

		last = e;
@@ -756,21 +835,53 @@ int oz_send_isoc_unit(struct oz_pd *pd, u8 ep_num, u8 *data, int len) 
		memcpy(oz_hdr, &oz, sizeof(oz));

		memcpy(oz_hdr+1, &iso, sizeof(iso));

		if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr,

				dev->dev_addr, skb->len) < 0) {

			kfree_skb(skb);

			return -1;

				dev->dev_addr, skb->len) < 0)

			goto out;



		skb->destructor = oz_isoc_destructor;

		/*Queue for Xmit if mode is not ANYTIME*/

		if (!(pd->mode & OZ_F_ISOC_ANYTIME)) {

			struct oz_tx_frame *isoc_unit = NULL;

			int nb = pd->nb_queued_isoc_frames;

			if (nb >= OZ_MAX_TX_QUEUE_ISOC) {

				oz_trace2(OZ_TRACE_TX_FRAMES,

						"Dropping ISOC Unit nb= %d\n",

									nb);

				goto out;

			}

			isoc_unit = oz_tx_frame_alloc(pd);

			if (isoc_unit == NULL)

				goto out;

			isoc_unit->hdr = oz;

			isoc_unit->skb = skb;

			spin_lock_bh(&pd->tx_frame_lock);

			list_add_tail(&isoc_unit->link, &pd->tx_queue);

			pd->nb_queued_isoc_frames++;

			spin_unlock_bh(&pd->tx_frame_lock);

			oz_trace2(OZ_TRACE_TX_FRAMES,

			"Added ISOC Frame to Tx Queue isoc_nb= %d, nb= %d\n",

			pd->nb_queued_isoc_frames, pd->nb_queued_frames);

			oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number,

					skb, atomic_read(&g_submitted_isoc));

			return 0;

		}



		/*In ANYTIME mode Xmit unit immediately*/

		if (atomic_read(&g_submitted_isoc) < OZ_MAX_SUBMITTED_ISOC) {

			skb->destructor = oz_isoc_destructor;

			atomic_inc(&g_submitted_isoc);

			oz_event_log(OZ_EVT_TX_ISOC, nb_units, iso.frame_number,

					skb, atomic_read(&g_submitted_isoc));

			if (dev_queue_xmit(skb) < 0)

				return -1;

		} else {

			if (dev_queue_xmit(skb) < 0) {

				oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0);

			kfree_skb(skb);

				return -1;

			} else

				return 0;

		}



out:	oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0);

	kfree_skb(skb);

	return -1;



	}

	return 0;

}

drivers/staging/ozwpan/ozpd.h

+2 −1
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ struct oz_tx_frame { 
	struct list_head link;

	struct list_head elt_list;

	struct oz_hdr hdr;

	struct sk_buff *skb;

	int total_size;

};
@@ -83,6 +84,7 @@ struct oz_pd { 
	u8		ms_per_isoc;

	unsigned	max_stream_buffering;

	int		nb_queued_frames;

	int		nb_queued_isoc_frames;

	struct list_head *tx_pool;

	int		tx_pool_count;

	spinlock_t	tx_frame_lock;
@@ -118,4 +120,3 @@ void oz_apps_init(void); 
void oz_apps_term(void);



#endif /* Sentry */

drivers/staging/ozwpan/ozproto.c

+1 −3
Original line number Diff line number Diff line
@@ -217,7 +217,6 @@ static struct oz_pd *oz_connect_req(struct oz_pd *cur_pd, struct oz_elt *elt, 
	pd->mode = body->mode;

	pd->pd_info = body->pd_info;

	if (pd->mode & OZ_F_ISOC_NO_ELTS) {

		pd->mode |= OZ_F_ISOC_ANYTIME;

		pd->ms_per_isoc = body->ms_per_isoc;

		if (!pd->ms_per_isoc)

			pd->ms_per_isoc = 4;
@@ -366,6 +365,7 @@ static void oz_rx_frame(struct sk_buff *skb) 
	}



	if (pd && !dup && ((pd->mode & OZ_MODE_MASK) == OZ_MODE_TRIGGERED)) {

		oz_trace2(OZ_TRACE_RX_FRAMES, "Received TRIGGER Frame\n");

		pd->last_sent_frame = &pd->tx_queue;

		if (oz_hdr->control & OZ_F_ACK) {

			/* Retire completed frames */
@@ -376,8 +376,6 @@ static void oz_rx_frame(struct sk_buff *skb) 
			int backlog = pd->nb_queued_frames;

			pd->trigger_pkt_num = pkt_num;

			/* Send queued frames */

			while (oz_prepare_frame(pd, 0) >= 0)

				;

			oz_send_queued_frames(pd, backlog);

		}

	}

drivers/staging/ozwpan/ozprotocol.h

+1 −0
Original line number Diff line number Diff line
@@ -89,6 +89,7 @@ struct oz_elt_connect_req { 
#define OZ_MODE_MASK		0xf

#define OZ_F_ISOC_NO_ELTS	0x40

#define OZ_F_ISOC_ANYTIME	0x80

#define OZ_NO_ELTS_ANYTIME	0xc0



/* Keep alive field.

 */