From 33e6ada17fffc54c24607d5acb279363b30ac401 Mon Sep 17 00:00:00 2001 From: Rupesh Gujare Date: Wed, 20 Jun 2012 13:36:06 +0100 Subject: [PATCH] staging: ozwpan: ISOC transfer in triggered mode This patch implements ISOC frame transfer while PD is in triggered mode. Signed-off-by: Rupesh Gujare Signed-off-by: Greg Kroah-Hartman --- drivers/staging/ozwpan/ozmain.c | 2 +- drivers/staging/ozwpan/ozpd.c | 171 +++++++++++++++++++++++++++++------- drivers/staging/ozwpan/ozpd.h | 3 +- drivers/staging/ozwpan/ozproto.c | 4 +- drivers/staging/ozwpan/ozprotocol.h | 1 + 5 files changed, 146 insertions(+), 35 deletions(-) diff --git a/drivers/staging/ozwpan/ozmain.c b/drivers/staging/ozwpan/ozmain.c index 7579645..c1ed6b2 100644 --- a/drivers/staging/ozwpan/ozmain.c +++ b/drivers/staging/ozwpan/ozmain.c @@ -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"); diff --git a/drivers/staging/ozwpan/ozpd.c b/drivers/staging/ozwpan/ozpd.c index 04cd57f..6c566f5 100644 --- a/drivers/staging/ozwpan/ozpd.c +++ b/drivers/staging/ozwpan/ozpd.c @@ -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); @@ -375,6 +381,23 @@ static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd) /*------------------------------------------------------------------------------ * 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 + */ static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *f) { spin_lock_bh(&pd->tx_frame_lock); @@ -389,6 +412,14 @@ static void oz_tx_frame_free(struct oz_pd *pd, struct oz_tx_frame *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 */ int oz_prepare_frame(struct oz_pd *pd, int empty) @@ -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<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; } - } else { - oz_send_next_queued_frame(pd, &more); + case OZ_NO_ELTS_ANYTIME: { + if ((backlog <= 0) && (pd->isoc_sent == 0)) + goto out; + break; + } + 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) + skb, atomic_read(&g_submitted_isoc)); + if (dev_queue_xmit(skb) < 0) { + oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); return -1; - } else { - oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); - kfree_skb(skb); + } else + return 0; } + +out: oz_event_log(OZ_EVT_TX_ISOC_DROP, 0, 0, 0, 0); + kfree_skb(skb); + return -1; + } return 0; } diff --git a/drivers/staging/ozwpan/ozpd.h b/drivers/staging/ozwpan/ozpd.h index afc77f0..ddf1341 100644 --- a/drivers/staging/ozwpan/ozpd.h +++ b/drivers/staging/ozwpan/ozpd.h @@ -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 */ - diff --git a/drivers/staging/ozwpan/ozproto.c b/drivers/staging/ozwpan/ozproto.c index ad857ee..502e18a 100644 --- a/drivers/staging/ozwpan/ozproto.c +++ b/drivers/staging/ozwpan/ozproto.c @@ -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); } } diff --git a/drivers/staging/ozwpan/ozprotocol.h b/drivers/staging/ozwpan/ozprotocol.h index b3e7d77..1e4edbe 100644 --- a/drivers/staging/ozwpan/ozprotocol.h +++ b/drivers/staging/ozwpan/ozprotocol.h @@ -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. */ -- 2.7.4