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scsi: qedi: Move LL2 producer index processing in BH.

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1. Removed logic to update HW producer index in interrupt context.

2. Update HW producer index after UIO ring and buffer gets initialized.

Signed-off-by: Manish Rangankar <manish.rangankar@cavium.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Manish Rangankar 2018-11-21 01:25:22 -08:00 committed by Martin K. Petersen
parent dcceeeb71f
commit 9632a6b4b7
1 changed files with 20 additions and 13 deletions
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33
drivers/scsi/qedi/qedi_main.c
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@ -665,7 +665,6 @@ static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
struct qedi_uio_ctrl *uctrl;
struct skb_work_list *work;
struct ethhdr *eh;
u32 prod;
if (!qedi) {
QEDI_ERR(NULL, "qedi is NULL\n");
@ -724,17 +723,10 @@ static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
spin_lock_bh(&qedi->ll2_lock);
list_add_tail(&work->list, &qedi->ll2_skb_list);
++uctrl->hw_rx_prod_cnt;
prod = (uctrl->hw_rx_prod + 1) % RX_RING;
if (prod != uctrl->host_rx_cons) {
uctrl->hw_rx_prod = prod;
spin_unlock_bh(&qedi->ll2_lock);
wake_up_process(qedi->ll2_recv_thread);
return 0;
}
spin_unlock_bh(&qedi->ll2_lock);
wake_up_process(qedi->ll2_recv_thread);
return 0;
}
@ -749,6 +741,7 @@ static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
u32 rx_bd_prod;
void *pkt;
int len = 0;
u32 prod;
if (!qedi) {
QEDI_ERR(NULL, "qedi is NULL\n");
@ -757,12 +750,16 @@ static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
udev = qedi->udev;
uctrl = udev->uctrl;
pkt = udev->rx_pkt + (uctrl->hw_rx_prod * qedi_ll2_buf_size);
++uctrl->hw_rx_prod_cnt;
prod = (uctrl->hw_rx_prod + 1) % RX_RING;
pkt = udev->rx_pkt + (prod * qedi_ll2_buf_size);
len = min_t(u32, skb->len, (u32)qedi_ll2_buf_size);
memcpy(pkt, skb->data, len);
memset(&rxbd, 0, sizeof(rxbd));
rxbd.rx_pkt_index = uctrl->hw_rx_prod;
rxbd.rx_pkt_index = prod;
rxbd.rx_pkt_len = len;
rxbd.vlan_id = vlan_id;
@ -773,6 +770,16 @@ static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
memcpy(p_rxbd, &rxbd, sizeof(rxbd));
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
"hw_rx_prod [%d] prod [%d] hw_rx_bd_prod [%d] rx_pkt_idx [%d] rx_len [%d].\n",
uctrl->hw_rx_prod, prod, uctrl->hw_rx_bd_prod,
rxbd.rx_pkt_index, rxbd.rx_pkt_len);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
"host_rx_cons [%d] hw_rx_bd_cons [%d].\n",
uctrl->host_rx_cons, uctrl->host_rx_bd_cons);
uctrl->hw_rx_prod = prod;
/* notify the iscsiuio about new packet */
uio_event_notify(&udev->qedi_uinfo);