qlcnic: create file qlcnic_io.c for datapath routines

Physical refactoring of 82xx adapter data path routines.

Move data path code to new file qlcnic_io.c
Existing data path code has coding stye issues, the code is
moved to the new file without fixing the style issues.

There is a seperate patch to fix the style issues in qlcnic_io.c

Signed-off-by: Sony Chacko <sony.chacko@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 630 deletions

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c
index ccbef8491d2..d8610ea56a4 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c
@@ -25,10 +25,6 @@ static unsigned int crb_addr_xform[QLCNIC_MAX_CRB_XFORM];
 
 #define QLCNIC_ADDR_ERROR (0xffffffff)
 
-static void
-qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
-                struct qlcnic_host_rds_ring *rds_ring);
-
 static int
 qlcnic_check_fw_hearbeat(struct qlcnic_adapter *adapter);
 
@@ -1332,629 +1328,3 @@ qlcnic_release_firmware(struct qlcnic_adapter *adapter)
         release_firmware(adapter->fw);
         adapter->fw = NULL;
 }
-
-static void
-qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
-                                struct qlcnic_fw_msg *msg)
-{
-        u32 cable_OUI;
-        u16 cable_len;
-        u16 link_speed;
-        u8  link_status, module, duplex, autoneg;
-        u8 lb_status = 0;
-        struct net_device *netdev = adapter->netdev;
-
-        adapter->has_link_events = 1;
-
-        cable_OUI = msg->body[1] & 0xffffffff;
-        cable_len = (msg->body[1] >> 32) & 0xffff;
-        link_speed = (msg->body[1] >> 48) & 0xffff;
-
-        link_status = msg->body[2] & 0xff;
-        duplex = (msg->body[2] >> 16) & 0xff;
-        autoneg = (msg->body[2] >> 24) & 0xff;
-        lb_status = (msg->body[2] >> 32) & 0x3;
-
-        module = (msg->body[2] >> 8) & 0xff;
-        if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
-                dev_info(&netdev->dev, "unsupported cable: OUI 0x%x, "
-                                "length %d\n", cable_OUI, cable_len);
-        else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
-                dev_info(&netdev->dev, "unsupported cable length %d\n",
-                                cable_len);
-
-        if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
-            lb_status == QLCNIC_ELB_MODE))
-                adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
-
-        qlcnic_advert_link_change(adapter, link_status);
-
-        if (duplex == LINKEVENT_FULL_DUPLEX)
-                adapter->link_duplex = DUPLEX_FULL;
-        else
-                adapter->link_duplex = DUPLEX_HALF;
-
-        adapter->module_type = module;
-        adapter->link_autoneg = autoneg;
-
-        if (link_status) {
-                adapter->link_speed = link_speed;
-        } else {
-                adapter->link_speed = SPEED_UNKNOWN;
-                adapter->link_duplex = DUPLEX_UNKNOWN;
-        }
-}
-
-static void
-qlcnic_handle_fw_message(int desc_cnt, int index,
-                struct qlcnic_host_sds_ring *sds_ring)
-{
-        struct qlcnic_fw_msg msg;
-        struct status_desc *desc;
-        struct qlcnic_adapter *adapter;
-        struct device *dev;
-        int i = 0, opcode, ret;
-
-        while (desc_cnt > 0 && i < 8) {
-                desc = &sds_ring->desc_head[index];
-                msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
-                msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
-
-                index = get_next_index(index, sds_ring->num_desc);
-                desc_cnt--;
-        }
-
-        adapter = sds_ring->adapter;
-        dev = &adapter->pdev->dev;
-        opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
-
-        switch (opcode) {
-        case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
-                qlcnic_handle_linkevent(adapter, &msg);
-                break;
-        case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
-                ret = (u32)(msg.body[1]);
-                switch (ret) {
-                case 0:
-                        adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
-                        break;
-                case 1:
-                        dev_info(dev, "loopback already in progress\n");
-                        adapter->diag_cnt = -QLCNIC_TEST_IN_PROGRESS;
-                        break;
-                case 2:
-                        dev_info(dev, "loopback cable is not connected\n");
-                        adapter->diag_cnt = -QLCNIC_LB_CABLE_NOT_CONN;
-                        break;
-                default:
-                        dev_info(dev, "loopback configure request failed,"
-                                        " ret %x\n", ret);
-                        adapter->diag_cnt = -QLCNIC_UNDEFINED_ERROR;
-                        break;
-                }
-                break;
-        default:
-                break;
-        }
-}
-
-static int
-qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
-                struct qlcnic_host_rds_ring *rds_ring,
-                struct qlcnic_rx_buffer *buffer)
-{
-        struct sk_buff *skb;
-        dma_addr_t dma;
-        struct pci_dev *pdev = adapter->pdev;
-
-        skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
-        if (!skb) {
-                adapter->stats.skb_alloc_failure++;
-                return -ENOMEM;
-        }
-
-        skb_reserve(skb, NET_IP_ALIGN);
-
-        dma = pci_map_single(pdev, skb->data,
-                        rds_ring->dma_size, PCI_DMA_FROMDEVICE);
-
-        if (pci_dma_mapping_error(pdev, dma)) {
-                adapter->stats.rx_dma_map_error++;
-                dev_kfree_skb_any(skb);
-                return -ENOMEM;
-        }
-
-        buffer->skb = skb;
-        buffer->dma = dma;
-
-        return 0;
-}
-
-static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
-                struct qlcnic_host_rds_ring *rds_ring, u16 index, u16 cksum)
-{
-        struct qlcnic_rx_buffer *buffer;
-        struct sk_buff *skb;
-
-        buffer = &rds_ring->rx_buf_arr[index];
-
-        if (unlikely(buffer->skb == NULL)) {
-                WARN_ON(1);
-                return NULL;
-        }
-
-        pci_unmap_single(adapter->pdev, buffer->dma, rds_ring->dma_size,
-                        PCI_DMA_FROMDEVICE);
-
-        skb = buffer->skb;
-
-        if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
-            (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
-                adapter->stats.csummed++;
-                skb->ip_summed = CHECKSUM_UNNECESSARY;
-        } else {
-                skb_checksum_none_assert(skb);
-        }
-
-        buffer->skb = NULL;
-
-        return skb;
-}
-
-static inline int
-qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, struct sk_buff *skb,
-                        u16 *vlan_tag)
-{
-        struct ethhdr *eth_hdr;
-
-        if (!__vlan_get_tag(skb, vlan_tag)) {
-                eth_hdr = (struct ethhdr *) skb->data;
-                memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
-                skb_pull(skb, VLAN_HLEN);
-        }
-        if (!adapter->pvid)
-                return 0;
-
-        if (*vlan_tag == adapter->pvid) {
-                /* Outer vlan tag. Packet should follow non-vlan path */
-                *vlan_tag = 0xffff;
-                return 0;
-        }
-        if (adapter->flags & QLCNIC_TAGGING_ENABLED)
-                return 0;
-
-        return -EINVAL;
-}
-
-static struct qlcnic_rx_buffer *
-qlcnic_process_rcv(struct qlcnic_adapter *adapter,
-                struct qlcnic_host_sds_ring *sds_ring,
-                int ring, u64 sts_data0)
-{
-        struct net_device *netdev = adapter->netdev;
-        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
-        struct qlcnic_rx_buffer *buffer;
-        struct sk_buff *skb;
-        struct qlcnic_host_rds_ring *rds_ring;
-        int index, length, cksum, pkt_offset;
-        u16 vid = 0xffff;
-
-        if (unlikely(ring >= adapter->max_rds_rings))
-                return NULL;
-
-        rds_ring = &recv_ctx->rds_rings[ring];
-
-        index = qlcnic_get_sts_refhandle(sts_data0);
-        if (unlikely(index >= rds_ring->num_desc))
-                return NULL;
-
-        buffer = &rds_ring->rx_buf_arr[index];
-
-        length = qlcnic_get_sts_totallength(sts_data0);
-        cksum  = qlcnic_get_sts_status(sts_data0);
-        pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
-
-        skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
-        if (!skb)
-                return buffer;
-
-        if (length > rds_ring->skb_size)
-                skb_put(skb, rds_ring->skb_size);
-        else
-                skb_put(skb, length);
-
-        if (pkt_offset)
-                skb_pull(skb, pkt_offset);
-
-        if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
-                adapter->stats.rxdropped++;
-                dev_kfree_skb(skb);
-                return buffer;
-        }
-
-        skb->protocol = eth_type_trans(skb, netdev);
-
-        if (vid != 0xffff)
-                __vlan_hwaccel_put_tag(skb, vid);
-
-        napi_gro_receive(&sds_ring->napi, skb);
-
-        adapter->stats.rx_pkts++;
-        adapter->stats.rxbytes += length;
-
-        return buffer;
-}
-
-#define QLC_TCP_HDR_SIZE            20
-#define QLC_TCP_TS_OPTION_SIZE      12
-#define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
-
-static struct qlcnic_rx_buffer *
-qlcnic_process_lro(struct qlcnic_adapter *adapter,
-                int ring, u64 sts_data0, u64 sts_data1)
-{
-        struct net_device *netdev = adapter->netdev;
-        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
-        struct qlcnic_rx_buffer *buffer;
-        struct sk_buff *skb;
-        struct qlcnic_host_rds_ring *rds_ring;
-        struct iphdr *iph;
-        struct tcphdr *th;
-        bool push, timestamp;
-        int l2_hdr_offset, l4_hdr_offset;
-        int index;
-        u16 lro_length, length, data_offset;
-        u32 seq_number;
-        u16 vid = 0xffff;
-
-        if (unlikely(ring > adapter->max_rds_rings))
-                return NULL;
-
-        rds_ring = &recv_ctx->rds_rings[ring];
-
-        index = qlcnic_get_lro_sts_refhandle(sts_data0);
-        if (unlikely(index > rds_ring->num_desc))
-                return NULL;
-
-        buffer = &rds_ring->rx_buf_arr[index];
-
-        timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
-        lro_length = qlcnic_get_lro_sts_length(sts_data0);
-        l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
-        l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
-        push = qlcnic_get_lro_sts_push_flag(sts_data0);
-        seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
-
-        skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
-        if (!skb)
-                return buffer;
-
-        if (timestamp)
-                data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
-        else
-                data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
-
-        skb_put(skb, lro_length + data_offset);
-
-        skb_pull(skb, l2_hdr_offset);
-
-        if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
-                adapter->stats.rxdropped++;
-                dev_kfree_skb(skb);
-                return buffer;
-        }
-
-        skb->protocol = eth_type_trans(skb, netdev);
-
-        iph = (struct iphdr *)skb->data;
-        th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
-
-        length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
-        iph->tot_len = htons(length);
-        iph->check = 0;
-        iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
-        th->psh = push;
-        th->seq = htonl(seq_number);
-
-        length = skb->len;
-
-        if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP)
-                skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
-
-        if (vid != 0xffff)
-                __vlan_hwaccel_put_tag(skb, vid);
-        netif_receive_skb(skb);
-
-        adapter->stats.lro_pkts++;
-        adapter->stats.lrobytes += length;
-
-        return buffer;
-}
-
-int
-qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
-{
-        struct qlcnic_adapter *adapter = sds_ring->adapter;
-        struct list_head *cur;
-        struct status_desc *desc;
-        struct qlcnic_rx_buffer *rxbuf;
-        u64 sts_data0, sts_data1;
-
-        int count = 0;
-        int opcode, ring, desc_cnt;
-        u32 consumer = sds_ring->consumer;
-
-        while (count < max) {
-                desc = &sds_ring->desc_head[consumer];
-                sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
-
-                if (!(sts_data0 & STATUS_OWNER_HOST))
-                        break;
-
-                desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
-                opcode = qlcnic_get_sts_opcode(sts_data0);
-
-                switch (opcode) {
-                case QLCNIC_RXPKT_DESC:
-                case QLCNIC_OLD_RXPKT_DESC:
-                case QLCNIC_SYN_OFFLOAD:
-                        ring = qlcnic_get_sts_type(sts_data0);
-                        rxbuf = qlcnic_process_rcv(adapter, sds_ring,
-                                        ring, sts_data0);
-                        break;
-                case QLCNIC_LRO_DESC:
-                        ring = qlcnic_get_lro_sts_type(sts_data0);
-                        sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
-                        rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
-                                                   sts_data1);
-                        break;
-                case QLCNIC_RESPONSE_DESC:
-                        qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
-                default:
-                        goto skip;
-                }
-
-                WARN_ON(desc_cnt > 1);
-
-                if (likely(rxbuf))
-                        list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
-                else
-                        adapter->stats.null_rxbuf++;
-
-skip:
-                for (; desc_cnt > 0; desc_cnt--) {
-                        desc = &sds_ring->desc_head[consumer];
-                        desc->status_desc_data[0] =
-                                cpu_to_le64(STATUS_OWNER_PHANTOM);
-                        consumer = get_next_index(consumer, sds_ring->num_desc);
-                }
-                count++;
-        }
-
-        for (ring = 0; ring < adapter->max_rds_rings; ring++) {
-                struct qlcnic_host_rds_ring *rds_ring =
-                        &adapter->recv_ctx->rds_rings[ring];
-
-                if (!list_empty(&sds_ring->free_list[ring])) {
-                        list_for_each(cur, &sds_ring->free_list[ring]) {
-                                rxbuf = list_entry(cur,
-                                                struct qlcnic_rx_buffer, list);
-                                qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
-                        }
-                        spin_lock(&rds_ring->lock);
-                        list_splice_tail_init(&sds_ring->free_list[ring],
-                                                &rds_ring->free_list);
-                        spin_unlock(&rds_ring->lock);
-                }
-
-                qlcnic_post_rx_buffers_nodb(adapter, rds_ring);
-        }
-
-        if (count) {
-                sds_ring->consumer = consumer;
-                writel(consumer, sds_ring->crb_sts_consumer);
-        }
-
-        return count;
-}
-
-void
-qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
-        struct qlcnic_host_rds_ring *rds_ring)
-{
-        struct rcv_desc *pdesc;
-        struct qlcnic_rx_buffer *buffer;
-        int count = 0;
-        u32 producer;
-        struct list_head *head;
-
-        producer = rds_ring->producer;
-
-        head = &rds_ring->free_list;
-        while (!list_empty(head)) {
-
-                buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
-
-                if (!buffer->skb) {
-                        if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
-                                break;
-                }
-
-                count++;
-                list_del(&buffer->list);
-
-                /* make a rcv descriptor  */
-                pdesc = &rds_ring->desc_head[producer];
-                pdesc->addr_buffer = cpu_to_le64(buffer->dma);
-                pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
-                pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
-
-                producer = get_next_index(producer, rds_ring->num_desc);
-        }
-
-        if (count) {
-                rds_ring->producer = producer;
-                writel((producer-1) & (rds_ring->num_desc-1),
-                                rds_ring->crb_rcv_producer);
-        }
-}
-
-static void
-qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
-                struct qlcnic_host_rds_ring *rds_ring)
-{
-        struct rcv_desc *pdesc;
-        struct qlcnic_rx_buffer *buffer;
-        int  count = 0;
-        uint32_t producer;
-        struct list_head *head;
-
-        if (!spin_trylock(&rds_ring->lock))
-                return;
-
-        producer = rds_ring->producer;
-
-        head = &rds_ring->free_list;
-        while (!list_empty(head)) {
-
-                buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
-
-                if (!buffer->skb) {
-                        if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
-                                break;
-                }
-
-                count++;
-                list_del(&buffer->list);
-
-                /* make a rcv descriptor  */
-                pdesc = &rds_ring->desc_head[producer];
-                pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
-                pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
-                pdesc->addr_buffer = cpu_to_le64(buffer->dma);
-
-                producer = get_next_index(producer, rds_ring->num_desc);
-        }
-
-        if (count) {
-                rds_ring->producer = producer;
-                writel((producer - 1) & (rds_ring->num_desc - 1),
-                                rds_ring->crb_rcv_producer);
-        }
-        spin_unlock(&rds_ring->lock);
-}
-
-static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
-{
-        int i;
-        unsigned char *data = skb->data;
-
-        printk(KERN_INFO "\n");
-        for (i = 0; i < skb->len; i++) {
-                QLCDB(adapter, DRV, "%02x ", data[i]);
-                if ((i & 0x0f) == 8)
-                        printk(KERN_INFO "\n");
-        }
-}
-
-static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
-                                    u64 sts_data0)
-{
-        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
-        struct sk_buff *skb;
-        struct qlcnic_host_rds_ring *rds_ring;
-        int index, length, cksum, pkt_offset;
-
-        if (unlikely(ring >= adapter->max_rds_rings))
-                return;
-
-        rds_ring = &recv_ctx->rds_rings[ring];
-
-        index = qlcnic_get_sts_refhandle(sts_data0);
-        length = qlcnic_get_sts_totallength(sts_data0);
-        if (unlikely(index >= rds_ring->num_desc))
-                return;
-
-        cksum  = qlcnic_get_sts_status(sts_data0);
-        pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
-
-        skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
-        if (!skb)
-                return;
-
-        if (length > rds_ring->skb_size)
-                skb_put(skb, rds_ring->skb_size);
-        else
-                skb_put(skb, length);
-
-        if (pkt_offset)
-                skb_pull(skb, pkt_offset);
-
-        if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
-                adapter->diag_cnt++;
-        else
-                dump_skb(skb, adapter);
-
-        dev_kfree_skb_any(skb);
-        adapter->stats.rx_pkts++;
-        adapter->stats.rxbytes += length;
-
-        return;
-}
-
-void
-qlcnic_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
-{
-        struct qlcnic_adapter *adapter = sds_ring->adapter;
-        struct status_desc *desc;
-        u64 sts_data0;
-        int ring, opcode, desc_cnt;
-
-        u32 consumer = sds_ring->consumer;
-
-        desc = &sds_ring->desc_head[consumer];
-        sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
-
-        if (!(sts_data0 & STATUS_OWNER_HOST))
-                return;
-
-        desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
-        opcode = qlcnic_get_sts_opcode(sts_data0);
-        switch (opcode) {
-        case QLCNIC_RESPONSE_DESC:
-                qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
-                break;
-        default:
-                ring = qlcnic_get_sts_type(sts_data0);
-                qlcnic_process_rcv_diag(adapter, ring, sts_data0);
-                break;
-        }
-
-        for (; desc_cnt > 0; desc_cnt--) {
-                desc = &sds_ring->desc_head[consumer];
-                desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
-                consumer = get_next_index(consumer, sds_ring->num_desc);
-        }
-
-        sds_ring->consumer = consumer;
-        writel(consumer, sds_ring->crb_sts_consumer);
-}
-
-void qlcnic_fetch_mac(u32 off1, u32 off2, u8 alt_mac, u8 *mac)
-{
-        u32 mac_low, mac_high;
-        int i;
-
-        mac_low = off1;
-        mac_high = off2;
-
-        if (alt_mac) {
-                mac_low |= (mac_low >> 16) | (mac_high << 16);
-                mac_high >>= 16;
-        }
-
-        for (i = 0; i < 2; i++)
-                mac[i] = (u8)(mac_high >> ((1 - i) * 8));
-        for (i = 2; i < 6; i++)
-                mac[i] = (u8)(mac_low >> ((5 - i) * 8));
-}