diff options
Diffstat (limited to 'package/kernel/lantiq/ltq-atm')
-rw-r--r-- | package/kernel/lantiq/ltq-atm/src/ifxmips_atm_core.h | 2 | ||||
-rw-r--r-- | package/kernel/lantiq/ltq-atm/src/ltq_atm.c | 132 |
2 files changed, 88 insertions, 46 deletions
diff --git a/package/kernel/lantiq/ltq-atm/src/ifxmips_atm_core.h b/package/kernel/lantiq/ltq-atm/src/ifxmips_atm_core.h index 2f754c982b..398be7d828 100644 --- a/package/kernel/lantiq/ltq-atm/src/ifxmips_atm_core.h +++ b/package/kernel/lantiq/ltq-atm/src/ifxmips_atm_core.h @@ -43,6 +43,7 @@ struct ltq_atm_ops { void (*fw_ver)(unsigned int *major, unsigned int *minor); }; +#include <linux/atomic.h> #include <lantiq_atm.h> /* @@ -195,6 +196,7 @@ struct connection { volatile struct tx_descriptor *tx_desc; unsigned int tx_desc_pos; struct sk_buff **tx_skb; + spinlock_t lock; unsigned int aal5_vcc_crc_err; /* number of packets with CRC error */ unsigned int aal5_vcc_oversize_sdu; /* number of packets with oversize error */ diff --git a/package/kernel/lantiq/ltq-atm/src/ltq_atm.c b/package/kernel/lantiq/ltq-atm/src/ltq_atm.c index a08fa22ce2..f306d19364 100644 --- a/package/kernel/lantiq/ltq-atm/src/ltq_atm.c +++ b/package/kernel/lantiq/ltq-atm/src/ltq_atm.c @@ -19,6 +19,8 @@ ** HISTORY ** $Date $Author $Comment ** 07 JUL 2009 Xu Liang Init Version +** +** Copyright 2017 Alexander Couzens <lynxis@fe80.eu> *******************************************************************************/ #define IFX_ATM_VER_MAJOR 1 @@ -444,6 +446,9 @@ static int ppe_open(struct atm_vcc *vcc) /* set htu entry */ set_htu_entry(vpi, vci, conn, vcc->qos.aal == ATM_AAL5 ? 1 : 0, 0); + *MBOX_IGU1_ISRC |= (1 << (conn + FIRST_QSB_QID + 16)); + *MBOX_IGU1_IER |= (1 << (conn + FIRST_QSB_QID + 16)); + ret = 0; PPE_OPEN_EXIT: @@ -511,14 +516,18 @@ static int ppe_send(struct atm_vcc *vcc, struct sk_buff *skb) int ret; int conn; int desc_base; + int byteoff; + int required; + /* the len of the data without offset and header */ + int datalen; + unsigned long flags; struct tx_descriptor reg_desc = {0}; + struct tx_inband_header *header; struct sk_buff *new_skb; if ( vcc == NULL || skb == NULL ) return -EINVAL; - skb_get(skb); - atm_free_tx_skb_vcc(skb, vcc); conn = find_vcc(vcc); if ( conn < 0 ) { @@ -532,31 +541,28 @@ static int ppe_send(struct atm_vcc *vcc, struct sk_buff *skb) goto PPE_SEND_FAIL; } - if ( vcc->qos.aal == ATM_AAL5 ) { - int byteoff; - int datalen; - struct tx_inband_header *header; + byteoff = (unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1); + required = sizeof(*header) + byteoff; + if (!skb_clone_writable(skb, required)) { + int expand_by = 0; + int ret; - byteoff = (unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1); - if ( skb_headroom(skb) < byteoff + TX_INBAND_HEADER_LENGTH ) - new_skb = skb_duplicate(skb); - else - new_skb = skb_break_away_from_protocol(skb); - if ( new_skb == NULL ) { - pr_err("either skb_duplicate or skb_break_away_from_protocol fail\n"); - ret = -ENOMEM; - goto PPE_SEND_FAIL; - } - dev_kfree_skb_any(skb); - skb = new_skb; + if (skb_headroom(skb) < required) + expand_by = required - skb_headroom(skb); - datalen = skb->len; - byteoff = (unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1); + ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC); + if (ret) { + printk("pskb_expand_head failed.\n"); + atm_free_tx_skb_vcc(skb, vcc); + return ret; + } + } - skb_push(skb, byteoff + TX_INBAND_HEADER_LENGTH); + datalen = skb->len; + header = (void *)skb_push(skb, byteoff + TX_INBAND_HEADER_LENGTH); - header = (struct tx_inband_header *)skb->data; + if ( vcc->qos.aal == ATM_AAL5 ) { /* setup inband trailer */ header->uu = 0; header->cpi = 0; @@ -576,23 +582,9 @@ static int ppe_send(struct atm_vcc *vcc, struct sk_buff *skb) reg_desc.byteoff = byteoff; reg_desc.iscell = 0; } else { - /* if data pointer is not aligned, allocate new sk_buff */ - if ( ((unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1)) != 0 ) { - pr_err("skb->data not aligned\n"); - new_skb = skb_duplicate(skb); - } else - new_skb = skb_break_away_from_protocol(skb); - if ( new_skb == NULL ) { - pr_err("either skb_duplicate or skb_break_away_from_protocol fail\n"); - ret = -ENOMEM; - goto PPE_SEND_FAIL; - } - dev_kfree_skb_any(skb); - skb = new_skb; - reg_desc.dataptr = (unsigned int)skb->data >> 2; reg_desc.datalen = skb->len; - reg_desc.byteoff = 0; + reg_desc.byteoff = byteoff; reg_desc.iscell = 1; } @@ -600,23 +592,25 @@ static int ppe_send(struct atm_vcc *vcc, struct sk_buff *skb) reg_desc.c = 1; reg_desc.sop = reg_desc.eop = 1; + spin_lock_irqsave(&g_atm_priv_data.conn[conn].lock, flags); desc_base = get_tx_desc(conn); if ( desc_base < 0 ) { + spin_unlock_irqrestore(&g_atm_priv_data.conn[conn].lock, flags); pr_debug("ALLOC_TX_CONNECTION_FAIL\n"); ret = -EIO; goto PPE_SEND_FAIL; } - - if ( vcc->stats ) - atomic_inc(&vcc->stats->tx); - if ( vcc->qos.aal == ATM_AAL5 ) - g_atm_priv_data.wtx_pdu++; - /* update descriptor send pointer */ if ( g_atm_priv_data.conn[conn].tx_skb[desc_base] != NULL ) dev_kfree_skb_any(g_atm_priv_data.conn[conn].tx_skb[desc_base]); g_atm_priv_data.conn[conn].tx_skb[desc_base] = skb; + spin_unlock_irqrestore(&g_atm_priv_data.conn[conn].lock, flags); + + if ( vcc->stats ) + atomic_inc(&vcc->stats->tx); + if ( vcc->qos.aal == ATM_AAL5 ) + g_atm_priv_data.wtx_pdu++; /* write discriptor to memory and write back cache */ g_atm_priv_data.conn[conn].tx_desc[desc_base] = reg_desc; dma_cache_wback((unsigned long)skb->data, skb->len); @@ -900,6 +894,42 @@ static struct sk_buff* skb_break_away_from_protocol(struct sk_buff *skb) return new_skb; } +static void free_tx_ring(unsigned int queue) +{ + unsigned long flags; + int i; + struct connection *conn = &g_atm_priv_data.conn[queue]; + struct sk_buff *skb; + + if (!conn) + return; + + spin_lock_irqsave(&conn->lock, flags); + + for (i = 0; i < dma_tx_descriptor_length; i++) { + if (conn->tx_desc[i].own == 0 && conn->tx_skb[i] != NULL) { + skb = conn->tx_skb[i]; + conn->tx_skb[i] = NULL; + atm_free_tx_skb_vcc(skb, ATM_SKB(skb)->vcc); + } + } + spin_unlock_irqrestore(&conn->lock, flags); +} + +static void mailbox_tx_handler(unsigned int queue_bitmap) +{ + int i; + int bit; + + /* only get valid queues */ + queue_bitmap &= g_atm_priv_data.conn_table; + + for ( i = 0, bit = 1; i < MAX_PVC_NUMBER; i++, bit <<= 1 ) { + if (queue_bitmap & bit) + free_tx_ring(i); + } +} + static inline void mailbox_oam_rx_handler(void) { unsigned int vlddes = WRX_DMA_CHANNEL_CONFIG(RX_DMA_CH_OAM)->vlddes; @@ -1050,12 +1080,22 @@ static inline void mailbox_aal_rx_handler(void) static void do_ppe_tasklet(unsigned long data) { + unsigned int irqs = *MBOX_IGU1_ISR; *MBOX_IGU1_ISRC = *MBOX_IGU1_ISR; - mailbox_oam_rx_handler(); - mailbox_aal_rx_handler(); + + if (irqs & (1 << RX_DMA_CH_AAL)) + mailbox_aal_rx_handler(); + if (irqs & (1 << RX_DMA_CH_OAM)) + mailbox_oam_rx_handler(); + + /* any valid tx irqs */ + if ((irqs >> (FIRST_QSB_QID + 16)) & g_atm_priv_data.conn_table) + mailbox_tx_handler(irqs >> (FIRST_QSB_QID + 16)); if ((*MBOX_IGU1_ISR & ((1 << RX_DMA_CH_AAL) | (1 << RX_DMA_CH_OAM))) != 0) tasklet_schedule(&g_dma_tasklet); + else if (*MBOX_IGU1_ISR >> (FIRST_QSB_QID + 16)) /* TX queue */ + tasklet_schedule(&g_dma_tasklet); else enable_irq(PPE_MAILBOX_IGU1_INT); } @@ -1512,6 +1552,7 @@ static inline int init_priv_data(void) p_tx_desc = (volatile struct tx_descriptor *)((((unsigned int)g_atm_priv_data.tx_desc_base + DESC_ALIGNMENT - 1) & ~(DESC_ALIGNMENT - 1)) | KSEG1); ppskb = (struct sk_buff **)(((unsigned int)g_atm_priv_data.tx_skb_base + 3) & ~3); for ( i = 0; i < MAX_PVC_NUMBER; i++ ) { + spin_lock_init(&g_atm_priv_data.conn[i].lock); g_atm_priv_data.conn[i].tx_desc = &p_tx_desc[i * dma_tx_descriptor_length]; g_atm_priv_data.conn[i].tx_skb = &ppskb[i * dma_tx_descriptor_length]; } @@ -1799,7 +1840,6 @@ static int ltq_atm_probe(struct platform_device *pdev) int ret; int port_num; struct port_cell_info port_cell = {0}; - int i, j; char ver_str[256]; match = of_match_device(ltq_atm_match, &pdev->dev); |