1 /* Applied Micro X-Gene SoC Ethernet Driver
3 * Copyright (c) 2014, Applied Micro Circuits Corporation
4 * Authors: Iyappan Subramanian <isubramanian@apm.com>
5 * Ravi Patel <rapatel@apm.com>
6 * Keyur Chudgar <kchudgar@apm.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "xgene_enet_main.h"
23 #include "xgene_enet_hw.h"
24 #include "xgene_enet_sgmac.h"
25 #include "xgene_enet_xgmac.h"
27 static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool)
29 struct xgene_enet_raw_desc16 *raw_desc;
32 for (i = 0; i < buf_pool->slots; i++) {
33 raw_desc = &buf_pool->raw_desc16[i];
35 /* Hardware expects descriptor in little endian format */
36 raw_desc->m0 = cpu_to_le64(i |
37 SET_VAL(FPQNUM, buf_pool->dst_ring_num) |
42 static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool,
46 struct xgene_enet_raw_desc16 *raw_desc;
47 struct net_device *ndev;
50 u32 tail = buf_pool->tail;
51 u32 slots = buf_pool->slots - 1;
55 ndev = buf_pool->ndev;
56 dev = ndev_to_dev(buf_pool->ndev);
57 bufdatalen = BUF_LEN_CODE_2K | (SKB_BUFFER_SIZE & GENMASK(11, 0));
58 len = XGENE_ENET_MAX_MTU;
60 for (i = 0; i < nbuf; i++) {
61 raw_desc = &buf_pool->raw_desc16[tail];
63 skb = netdev_alloc_skb_ip_align(ndev, len);
66 buf_pool->rx_skb[tail] = skb;
68 dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE);
69 if (dma_mapping_error(dev, dma_addr)) {
70 netdev_err(ndev, "DMA mapping error\n");
71 dev_kfree_skb_any(skb);
75 raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) |
76 SET_VAL(BUFDATALEN, bufdatalen) |
78 tail = (tail + 1) & slots;
81 iowrite32(nbuf, buf_pool->cmd);
82 buf_pool->tail = tail;
87 static u16 xgene_enet_dst_ring_num(struct xgene_enet_desc_ring *ring)
89 struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
91 return ((u16)pdata->rm << 10) | ring->num;
94 static u8 xgene_enet_hdr_len(const void *data)
96 const struct ethhdr *eth = data;
98 return (eth->h_proto == htons(ETH_P_8021Q)) ? VLAN_ETH_HLEN : ETH_HLEN;
101 static u32 xgene_enet_ring_len(struct xgene_enet_desc_ring *ring)
103 u32 __iomem *cmd_base = ring->cmd_base;
104 u32 ring_state, num_msgs;
106 ring_state = ioread32(&cmd_base[1]);
107 num_msgs = ring_state & CREATE_MASK(NUMMSGSINQ_POS, NUMMSGSINQ_LEN);
109 return num_msgs >> NUMMSGSINQ_POS;
112 static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool)
114 struct xgene_enet_raw_desc16 *raw_desc;
115 u32 slots = buf_pool->slots - 1;
116 u32 tail = buf_pool->tail;
120 len = xgene_enet_ring_len(buf_pool);
121 for (i = 0; i < len; i++) {
122 tail = (tail - 1) & slots;
123 raw_desc = &buf_pool->raw_desc16[tail];
125 /* Hardware stores descriptor in little endian format */
126 userinfo = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0));
127 dev_kfree_skb_any(buf_pool->rx_skb[userinfo]);
130 iowrite32(-len, buf_pool->cmd);
131 buf_pool->tail = tail;
134 static irqreturn_t xgene_enet_rx_irq(const int irq, void *data)
136 struct xgene_enet_desc_ring *rx_ring = data;
138 if (napi_schedule_prep(&rx_ring->napi)) {
139 disable_irq_nosync(irq);
140 __napi_schedule(&rx_ring->napi);
146 static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring,
147 struct xgene_enet_raw_desc *raw_desc)
155 skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0));
156 skb = cp_ring->cp_skb[skb_index];
158 dev = ndev_to_dev(cp_ring->ndev);
159 dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)),
160 GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1)),
163 /* Checking for error */
164 status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0));
165 if (unlikely(status > 2)) {
166 xgene_enet_parse_error(cp_ring, netdev_priv(cp_ring->ndev),
172 dev_kfree_skb_any(skb);
174 netdev_err(cp_ring->ndev, "completion skb is NULL\n");
181 static u64 xgene_enet_work_msg(struct sk_buff *skb)
184 u8 l3hlen, l4hlen = 0;
190 if (unlikely(skb->protocol != htons(ETH_P_IP)) &&
191 unlikely(skb->protocol != htons(ETH_P_8021Q)))
194 if (unlikely(!(skb->dev->features & NETIF_F_IP_CSUM)))
198 if (unlikely(ip_is_fragment(iph)))
201 if (likely(iph->protocol == IPPROTO_TCP)) {
202 l4hlen = tcp_hdrlen(skb) >> 2;
204 proto = TSO_IPPROTO_TCP;
205 } else if (iph->protocol == IPPROTO_UDP) {
206 l4hlen = UDP_HDR_SIZE;
210 l3hlen = ip_hdrlen(skb) >> 2;
211 ethhdr = xgene_enet_hdr_len(skb->data);
212 hopinfo = SET_VAL(TCPHDR, l4hlen) |
213 SET_VAL(IPHDR, l3hlen) |
214 SET_VAL(ETHHDR, ethhdr) |
215 SET_VAL(EC, csum_enable) |
218 SET_BIT(TYPE_ETH_WORK_MESSAGE);
223 static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring,
226 struct device *dev = ndev_to_dev(tx_ring->ndev);
227 struct xgene_enet_raw_desc *raw_desc;
229 u16 tail = tx_ring->tail;
232 raw_desc = &tx_ring->raw_desc[tail];
233 memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc));
235 dma_addr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
236 if (dma_mapping_error(dev, dma_addr)) {
237 netdev_err(tx_ring->ndev, "DMA mapping error\n");
241 /* Hardware expects descriptor in little endian format */
242 raw_desc->m0 = cpu_to_le64(tail);
243 raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) |
244 SET_VAL(BUFDATALEN, skb->len) |
246 hopinfo = xgene_enet_work_msg(skb);
247 raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) |
249 tx_ring->cp_ring->cp_skb[tail] = skb;
254 static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb,
255 struct net_device *ndev)
257 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
258 struct xgene_enet_desc_ring *tx_ring = pdata->tx_ring;
259 struct xgene_enet_desc_ring *cp_ring = tx_ring->cp_ring;
260 u32 tx_level, cq_level;
262 tx_level = xgene_enet_ring_len(tx_ring);
263 cq_level = xgene_enet_ring_len(cp_ring);
264 if (unlikely(tx_level > pdata->tx_qcnt_hi ||
265 cq_level > pdata->cp_qcnt_hi)) {
266 netif_stop_queue(ndev);
267 return NETDEV_TX_BUSY;
270 if (xgene_enet_setup_tx_desc(tx_ring, skb)) {
271 dev_kfree_skb_any(skb);
275 iowrite32(1, tx_ring->cmd);
276 skb_tx_timestamp(skb);
277 tx_ring->tail = (tx_ring->tail + 1) & (tx_ring->slots - 1);
279 pdata->stats.tx_packets++;
280 pdata->stats.tx_bytes += skb->len;
285 static void xgene_enet_skip_csum(struct sk_buff *skb)
287 struct iphdr *iph = ip_hdr(skb);
289 if (!ip_is_fragment(iph) ||
290 (iph->protocol != IPPROTO_TCP && iph->protocol != IPPROTO_UDP)) {
291 skb->ip_summed = CHECKSUM_UNNECESSARY;
295 static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring,
296 struct xgene_enet_raw_desc *raw_desc)
298 struct net_device *ndev;
299 struct xgene_enet_pdata *pdata;
301 struct xgene_enet_desc_ring *buf_pool;
302 u32 datalen, skb_index;
307 ndev = rx_ring->ndev;
308 pdata = netdev_priv(ndev);
309 dev = ndev_to_dev(rx_ring->ndev);
310 buf_pool = rx_ring->buf_pool;
312 dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)),
313 XGENE_ENET_MAX_MTU, DMA_FROM_DEVICE);
314 skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0));
315 skb = buf_pool->rx_skb[skb_index];
317 /* checking for error */
318 status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0));
319 if (unlikely(status > 2)) {
320 dev_kfree_skb_any(skb);
321 xgene_enet_parse_error(rx_ring, netdev_priv(rx_ring->ndev),
323 pdata->stats.rx_dropped++;
328 /* strip off CRC as HW isn't doing this */
329 datalen = GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1));
331 prefetch(skb->data - NET_IP_ALIGN);
332 skb_put(skb, datalen);
334 skb_checksum_none_assert(skb);
335 skb->protocol = eth_type_trans(skb, ndev);
336 if (likely((ndev->features & NETIF_F_IP_CSUM) &&
337 skb->protocol == htons(ETH_P_IP))) {
338 xgene_enet_skip_csum(skb);
341 pdata->stats.rx_packets++;
342 pdata->stats.rx_bytes += datalen;
343 napi_gro_receive(&rx_ring->napi, skb);
345 if (--rx_ring->nbufpool == 0) {
346 ret = xgene_enet_refill_bufpool(buf_pool, NUM_BUFPOOL);
347 rx_ring->nbufpool = NUM_BUFPOOL;
353 static bool is_rx_desc(struct xgene_enet_raw_desc *raw_desc)
355 return GET_VAL(FPQNUM, le64_to_cpu(raw_desc->m0)) ? true : false;
358 static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring,
361 struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
362 struct xgene_enet_raw_desc *raw_desc;
363 u16 head = ring->head;
364 u16 slots = ring->slots - 1;
368 raw_desc = &ring->raw_desc[head];
369 if (unlikely(xgene_enet_is_desc_slot_empty(raw_desc)))
372 /* read fpqnum field after dataaddr field */
374 if (is_rx_desc(raw_desc))
375 ret = xgene_enet_rx_frame(ring, raw_desc);
377 ret = xgene_enet_tx_completion(ring, raw_desc);
378 xgene_enet_mark_desc_slot_empty(raw_desc);
380 head = (head + 1) & slots;
388 iowrite32(-count, ring->cmd);
391 if (netif_queue_stopped(ring->ndev)) {
392 if (xgene_enet_ring_len(ring) < pdata->cp_qcnt_low)
393 netif_wake_queue(ring->ndev);
400 static int xgene_enet_napi(struct napi_struct *napi, const int budget)
402 struct xgene_enet_desc_ring *ring;
405 ring = container_of(napi, struct xgene_enet_desc_ring, napi);
406 processed = xgene_enet_process_ring(ring, budget);
408 if (processed != budget) {
410 enable_irq(ring->irq);
416 static void xgene_enet_timeout(struct net_device *ndev)
418 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
420 pdata->mac_ops->reset(pdata);
423 static int xgene_enet_register_irq(struct net_device *ndev)
425 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
426 struct device *dev = ndev_to_dev(ndev);
429 ret = devm_request_irq(dev, pdata->rx_ring->irq, xgene_enet_rx_irq,
430 IRQF_SHARED, ndev->name, pdata->rx_ring);
432 netdev_err(ndev, "rx%d interrupt request failed\n",
433 pdata->rx_ring->irq);
439 static void xgene_enet_free_irq(struct net_device *ndev)
441 struct xgene_enet_pdata *pdata;
444 pdata = netdev_priv(ndev);
445 dev = ndev_to_dev(ndev);
446 devm_free_irq(dev, pdata->rx_ring->irq, pdata->rx_ring);
449 static int xgene_enet_open(struct net_device *ndev)
451 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
452 struct xgene_mac_ops *mac_ops = pdata->mac_ops;
455 mac_ops->tx_enable(pdata);
456 mac_ops->rx_enable(pdata);
458 ret = xgene_enet_register_irq(ndev);
461 napi_enable(&pdata->rx_ring->napi);
463 if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
464 phy_start(pdata->phy_dev);
466 schedule_delayed_work(&pdata->link_work, PHY_POLL_LINK_OFF);
468 netif_start_queue(ndev);
473 static int xgene_enet_close(struct net_device *ndev)
475 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
476 struct xgene_mac_ops *mac_ops = pdata->mac_ops;
478 netif_stop_queue(ndev);
480 if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
481 phy_stop(pdata->phy_dev);
483 cancel_delayed_work_sync(&pdata->link_work);
485 napi_disable(&pdata->rx_ring->napi);
486 xgene_enet_free_irq(ndev);
487 xgene_enet_process_ring(pdata->rx_ring, -1);
489 mac_ops->tx_disable(pdata);
490 mac_ops->rx_disable(pdata);
495 static void xgene_enet_delete_ring(struct xgene_enet_desc_ring *ring)
497 struct xgene_enet_pdata *pdata;
500 pdata = netdev_priv(ring->ndev);
501 dev = ndev_to_dev(ring->ndev);
503 xgene_enet_clear_ring(ring);
504 dma_free_coherent(dev, ring->size, ring->desc_addr, ring->dma);
507 static void xgene_enet_delete_desc_rings(struct xgene_enet_pdata *pdata)
509 struct xgene_enet_desc_ring *buf_pool;
511 if (pdata->tx_ring) {
512 xgene_enet_delete_ring(pdata->tx_ring);
513 pdata->tx_ring = NULL;
516 if (pdata->rx_ring) {
517 buf_pool = pdata->rx_ring->buf_pool;
518 xgene_enet_delete_bufpool(buf_pool);
519 xgene_enet_delete_ring(buf_pool);
520 xgene_enet_delete_ring(pdata->rx_ring);
521 pdata->rx_ring = NULL;
525 static int xgene_enet_get_ring_size(struct device *dev,
526 enum xgene_enet_ring_cfgsize cfgsize)
531 case RING_CFGSIZE_512B:
534 case RING_CFGSIZE_2KB:
537 case RING_CFGSIZE_16KB:
540 case RING_CFGSIZE_64KB:
543 case RING_CFGSIZE_512KB:
547 dev_err(dev, "Unsupported cfg ring size %d\n", cfgsize);
554 static void xgene_enet_free_desc_ring(struct xgene_enet_desc_ring *ring)
561 dev = ndev_to_dev(ring->ndev);
563 if (ring->desc_addr) {
564 xgene_enet_clear_ring(ring);
565 dma_free_coherent(dev, ring->size, ring->desc_addr, ring->dma);
567 devm_kfree(dev, ring);
570 static void xgene_enet_free_desc_rings(struct xgene_enet_pdata *pdata)
572 struct device *dev = &pdata->pdev->dev;
573 struct xgene_enet_desc_ring *ring;
575 ring = pdata->tx_ring;
577 if (ring->cp_ring && ring->cp_ring->cp_skb)
578 devm_kfree(dev, ring->cp_ring->cp_skb);
579 xgene_enet_free_desc_ring(ring);
582 ring = pdata->rx_ring;
584 if (ring->buf_pool) {
585 if (ring->buf_pool->rx_skb)
586 devm_kfree(dev, ring->buf_pool->rx_skb);
587 xgene_enet_free_desc_ring(ring->buf_pool);
589 xgene_enet_free_desc_ring(ring);
593 static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring(
594 struct net_device *ndev, u32 ring_num,
595 enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id)
597 struct xgene_enet_desc_ring *ring;
598 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
599 struct device *dev = ndev_to_dev(ndev);
602 size = xgene_enet_get_ring_size(dev, cfgsize);
606 ring = devm_kzalloc(dev, sizeof(struct xgene_enet_desc_ring),
612 ring->num = ring_num;
613 ring->cfgsize = cfgsize;
616 ring->desc_addr = dma_zalloc_coherent(dev, size, &ring->dma,
618 if (!ring->desc_addr) {
619 devm_kfree(dev, ring);
624 ring->cmd_base = pdata->ring_cmd_addr + (ring->num << 6);
625 ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR;
626 ring = xgene_enet_setup_ring(ring);
627 netdev_dbg(ndev, "ring info: num=%d size=%d id=%d slots=%d\n",
628 ring->num, ring->size, ring->id, ring->slots);
633 static u16 xgene_enet_get_ring_id(enum xgene_ring_owner owner, u8 bufnum)
635 return (owner << 6) | (bufnum & GENMASK(5, 0));
638 static int xgene_enet_create_desc_rings(struct net_device *ndev)
640 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
641 struct device *dev = ndev_to_dev(ndev);
642 struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring;
643 struct xgene_enet_desc_ring *buf_pool = NULL;
644 u8 cpu_bufnum = 0, eth_bufnum = START_ETH_BUFNUM;
645 u8 bp_bufnum = START_BP_BUFNUM;
646 u16 ring_id, ring_num = START_RING_NUM;
649 /* allocate rx descriptor ring */
650 ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, cpu_bufnum++);
651 rx_ring = xgene_enet_create_desc_ring(ndev, ring_num++,
652 RING_CFGSIZE_16KB, ring_id);
658 /* allocate buffer pool for receiving packets */
659 ring_id = xgene_enet_get_ring_id(RING_OWNER_ETH0, bp_bufnum++);
660 buf_pool = xgene_enet_create_desc_ring(ndev, ring_num++,
661 RING_CFGSIZE_2KB, ring_id);
667 rx_ring->nbufpool = NUM_BUFPOOL;
668 rx_ring->buf_pool = buf_pool;
669 rx_ring->irq = pdata->rx_irq;
670 buf_pool->rx_skb = devm_kcalloc(dev, buf_pool->slots,
671 sizeof(struct sk_buff *), GFP_KERNEL);
672 if (!buf_pool->rx_skb) {
677 buf_pool->dst_ring_num = xgene_enet_dst_ring_num(buf_pool);
678 rx_ring->buf_pool = buf_pool;
679 pdata->rx_ring = rx_ring;
681 /* allocate tx descriptor ring */
682 ring_id = xgene_enet_get_ring_id(RING_OWNER_ETH0, eth_bufnum++);
683 tx_ring = xgene_enet_create_desc_ring(ndev, ring_num++,
684 RING_CFGSIZE_16KB, ring_id);
689 pdata->tx_ring = tx_ring;
691 cp_ring = pdata->rx_ring;
692 cp_ring->cp_skb = devm_kcalloc(dev, tx_ring->slots,
693 sizeof(struct sk_buff *), GFP_KERNEL);
694 if (!cp_ring->cp_skb) {
698 pdata->tx_ring->cp_ring = cp_ring;
699 pdata->tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring);
701 pdata->tx_qcnt_hi = pdata->tx_ring->slots / 2;
702 pdata->cp_qcnt_hi = pdata->rx_ring->slots / 2;
703 pdata->cp_qcnt_low = pdata->cp_qcnt_hi / 2;
708 xgene_enet_free_desc_rings(pdata);
712 static struct rtnl_link_stats64 *xgene_enet_get_stats64(
713 struct net_device *ndev,
714 struct rtnl_link_stats64 *storage)
716 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
717 struct rtnl_link_stats64 *stats = &pdata->stats;
719 stats->rx_errors += stats->rx_length_errors +
720 stats->rx_crc_errors +
721 stats->rx_frame_errors +
722 stats->rx_fifo_errors;
723 memcpy(storage, &pdata->stats, sizeof(struct rtnl_link_stats64));
728 static int xgene_enet_set_mac_address(struct net_device *ndev, void *addr)
730 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
733 ret = eth_mac_addr(ndev, addr);
736 pdata->mac_ops->set_mac_addr(pdata);
741 static const struct net_device_ops xgene_ndev_ops = {
742 .ndo_open = xgene_enet_open,
743 .ndo_stop = xgene_enet_close,
744 .ndo_start_xmit = xgene_enet_start_xmit,
745 .ndo_tx_timeout = xgene_enet_timeout,
746 .ndo_get_stats64 = xgene_enet_get_stats64,
747 .ndo_change_mtu = eth_change_mtu,
748 .ndo_set_mac_address = xgene_enet_set_mac_address,
751 static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
753 struct platform_device *pdev;
754 struct net_device *ndev;
756 struct resource *res;
757 void __iomem *base_addr;
765 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "enet_csr");
766 pdata->base_addr = devm_ioremap_resource(dev, res);
767 if (IS_ERR(pdata->base_addr)) {
768 dev_err(dev, "Unable to retrieve ENET Port CSR region\n");
769 return PTR_ERR(pdata->base_addr);
772 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ring_csr");
773 pdata->ring_csr_addr = devm_ioremap_resource(dev, res);
774 if (IS_ERR(pdata->ring_csr_addr)) {
775 dev_err(dev, "Unable to retrieve ENET Ring CSR region\n");
776 return PTR_ERR(pdata->ring_csr_addr);
779 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ring_cmd");
780 pdata->ring_cmd_addr = devm_ioremap_resource(dev, res);
781 if (IS_ERR(pdata->ring_cmd_addr)) {
782 dev_err(dev, "Unable to retrieve ENET Ring command region\n");
783 return PTR_ERR(pdata->ring_cmd_addr);
786 ret = platform_get_irq(pdev, 0);
788 dev_err(dev, "Unable to get ENET Rx IRQ\n");
789 ret = ret ? : -ENXIO;
794 mac = of_get_mac_address(dev->of_node);
796 memcpy(ndev->dev_addr, mac, ndev->addr_len);
798 eth_hw_addr_random(ndev);
799 memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len);
801 pdata->phy_mode = of_get_phy_mode(pdev->dev.of_node);
802 if (pdata->phy_mode < 0) {
803 dev_err(dev, "Unable to get phy-connection-type\n");
804 return pdata->phy_mode;
806 if (pdata->phy_mode != PHY_INTERFACE_MODE_RGMII &&
807 pdata->phy_mode != PHY_INTERFACE_MODE_SGMII &&
808 pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) {
809 dev_err(dev, "Incorrect phy-connection-type specified\n");
813 pdata->clk = devm_clk_get(&pdev->dev, NULL);
814 ret = IS_ERR(pdata->clk);
815 if (IS_ERR(pdata->clk)) {
816 dev_err(&pdev->dev, "can't get clock\n");
817 ret = PTR_ERR(pdata->clk);
821 base_addr = pdata->base_addr;
822 pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET;
823 pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET;
824 pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET;
825 if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII ||
826 pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) {
827 pdata->mcx_mac_addr = base_addr + BLOCK_ETH_MAC_OFFSET;
828 pdata->mcx_mac_csr_addr = base_addr + BLOCK_ETH_MAC_CSR_OFFSET;
830 pdata->mcx_mac_addr = base_addr + BLOCK_AXG_MAC_OFFSET;
831 pdata->mcx_mac_csr_addr = base_addr + BLOCK_AXG_MAC_CSR_OFFSET;
833 pdata->rx_buff_cnt = NUM_PKT_BUF;
838 static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata)
840 struct net_device *ndev = pdata->ndev;
841 struct xgene_enet_desc_ring *buf_pool;
845 ret = pdata->port_ops->reset(pdata);
849 ret = xgene_enet_create_desc_rings(ndev);
851 netdev_err(ndev, "Error in ring configuration\n");
855 /* setup buffer pool */
856 buf_pool = pdata->rx_ring->buf_pool;
857 xgene_enet_init_bufpool(buf_pool);
858 ret = xgene_enet_refill_bufpool(buf_pool, pdata->rx_buff_cnt);
860 xgene_enet_delete_desc_rings(pdata);
864 dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring);
865 pdata->port_ops->cle_bypass(pdata, dst_ring_num, buf_pool->id);
866 pdata->mac_ops->init(pdata);
871 static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata)
873 switch (pdata->phy_mode) {
874 case PHY_INTERFACE_MODE_RGMII:
875 pdata->mac_ops = &xgene_gmac_ops;
876 pdata->port_ops = &xgene_gport_ops;
879 case PHY_INTERFACE_MODE_SGMII:
880 pdata->mac_ops = &xgene_sgmac_ops;
881 pdata->port_ops = &xgene_sgport_ops;
885 pdata->mac_ops = &xgene_xgmac_ops;
886 pdata->port_ops = &xgene_xgport_ops;
892 static int xgene_enet_probe(struct platform_device *pdev)
894 struct net_device *ndev;
895 struct xgene_enet_pdata *pdata;
896 struct device *dev = &pdev->dev;
897 struct napi_struct *napi;
898 struct xgene_mac_ops *mac_ops;
901 ndev = alloc_etherdev(sizeof(struct xgene_enet_pdata));
905 pdata = netdev_priv(ndev);
909 SET_NETDEV_DEV(ndev, dev);
910 platform_set_drvdata(pdev, pdata);
911 ndev->netdev_ops = &xgene_ndev_ops;
912 xgene_enet_set_ethtool_ops(ndev);
913 ndev->features |= NETIF_F_IP_CSUM |
917 ret = xgene_enet_get_resources(pdata);
921 xgene_enet_setup_ops(pdata);
923 ret = register_netdev(ndev);
925 netdev_err(ndev, "Failed to register netdev\n");
929 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
931 netdev_err(ndev, "No usable DMA configuration\n");
935 ret = xgene_enet_init_hw(pdata);
939 napi = &pdata->rx_ring->napi;
940 netif_napi_add(ndev, napi, xgene_enet_napi, NAPI_POLL_WEIGHT);
941 mac_ops = pdata->mac_ops;
942 if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
943 ret = xgene_enet_mdio_config(pdata);
945 INIT_DELAYED_WORK(&pdata->link_work, mac_ops->link_state);
949 unregister_netdev(ndev);
954 static int xgene_enet_remove(struct platform_device *pdev)
956 struct xgene_enet_pdata *pdata;
957 struct xgene_mac_ops *mac_ops;
958 struct net_device *ndev;
960 pdata = platform_get_drvdata(pdev);
961 mac_ops = pdata->mac_ops;
964 mac_ops->rx_disable(pdata);
965 mac_ops->tx_disable(pdata);
967 netif_napi_del(&pdata->rx_ring->napi);
968 xgene_enet_mdio_remove(pdata);
969 xgene_enet_delete_desc_rings(pdata);
970 unregister_netdev(ndev);
971 pdata->port_ops->shutdown(pdata);
977 static struct of_device_id xgene_enet_match[] = {
978 {.compatible = "apm,xgene-enet",},
982 MODULE_DEVICE_TABLE(of, xgene_enet_match);
984 static struct platform_driver xgene_enet_driver = {
986 .name = "xgene-enet",
987 .of_match_table = xgene_enet_match,
989 .probe = xgene_enet_probe,
990 .remove = xgene_enet_remove,
993 module_platform_driver(xgene_enet_driver);
995 MODULE_DESCRIPTION("APM X-Gene SoC Ethernet driver");
996 MODULE_VERSION(XGENE_DRV_VERSION);
997 MODULE_AUTHOR("Iyappan Subramanian <isubramanian@apm.com>");
998 MODULE_AUTHOR("Keyur Chudgar <kchudgar@apm.com>");
999 MODULE_LICENSE("GPL");