Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1 | /* Applied Micro X-Gene SoC Ethernet Driver |
| 2 | * |
| 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> |
| 7 | * |
| 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. |
| 12 | * |
| 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. |
| 17 | * |
| 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/>. |
| 20 | */ |
| 21 | |
Iyappan Subramanian | 27ecf87 | 2016-08-12 22:05:44 -0700 | [diff] [blame] | 22 | #include <linux/gpio.h> |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 23 | #include "xgene_enet_main.h" |
| 24 | #include "xgene_enet_hw.h" |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 25 | #include "xgene_enet_sgmac.h" |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 26 | #include "xgene_enet_xgmac.h" |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 27 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 28 | #define RES_ENET_CSR 0 |
| 29 | #define RES_RING_CSR 1 |
| 30 | #define RES_RING_CMD 2 |
| 31 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 32 | static const struct of_device_id xgene_enet_of_match[]; |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 33 | static const struct acpi_device_id xgene_enet_acpi_match[]; |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 34 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 35 | static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool) |
| 36 | { |
| 37 | struct xgene_enet_raw_desc16 *raw_desc; |
| 38 | int i; |
| 39 | |
| 40 | for (i = 0; i < buf_pool->slots; i++) { |
| 41 | raw_desc = &buf_pool->raw_desc16[i]; |
| 42 | |
| 43 | /* Hardware expects descriptor in little endian format */ |
| 44 | raw_desc->m0 = cpu_to_le64(i | |
| 45 | SET_VAL(FPQNUM, buf_pool->dst_ring_num) | |
| 46 | SET_VAL(STASH, 3)); |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool, |
| 51 | u32 nbuf) |
| 52 | { |
| 53 | struct sk_buff *skb; |
| 54 | struct xgene_enet_raw_desc16 *raw_desc; |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 55 | struct xgene_enet_pdata *pdata; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 56 | struct net_device *ndev; |
| 57 | struct device *dev; |
| 58 | dma_addr_t dma_addr; |
| 59 | u32 tail = buf_pool->tail; |
| 60 | u32 slots = buf_pool->slots - 1; |
| 61 | u16 bufdatalen, len; |
| 62 | int i; |
| 63 | |
| 64 | ndev = buf_pool->ndev; |
| 65 | dev = ndev_to_dev(buf_pool->ndev); |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 66 | pdata = netdev_priv(ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 67 | bufdatalen = BUF_LEN_CODE_2K | (SKB_BUFFER_SIZE & GENMASK(11, 0)); |
| 68 | len = XGENE_ENET_MAX_MTU; |
| 69 | |
| 70 | for (i = 0; i < nbuf; i++) { |
| 71 | raw_desc = &buf_pool->raw_desc16[tail]; |
| 72 | |
| 73 | skb = netdev_alloc_skb_ip_align(ndev, len); |
| 74 | if (unlikely(!skb)) |
| 75 | return -ENOMEM; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 76 | |
| 77 | dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE); |
| 78 | if (dma_mapping_error(dev, dma_addr)) { |
| 79 | netdev_err(ndev, "DMA mapping error\n"); |
| 80 | dev_kfree_skb_any(skb); |
| 81 | return -EINVAL; |
| 82 | } |
| 83 | |
Iyappan Subramanian | 6e43462 | 2016-08-12 22:05:38 -0700 | [diff] [blame] | 84 | buf_pool->rx_skb[tail] = skb; |
| 85 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 86 | raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | |
| 87 | SET_VAL(BUFDATALEN, bufdatalen) | |
| 88 | SET_BIT(COHERENT)); |
| 89 | tail = (tail + 1) & slots; |
| 90 | } |
| 91 | |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 92 | pdata->ring_ops->wr_cmd(buf_pool, nbuf); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 93 | buf_pool->tail = tail; |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 98 | static u8 xgene_enet_hdr_len(const void *data) |
| 99 | { |
| 100 | const struct ethhdr *eth = data; |
| 101 | |
| 102 | return (eth->h_proto == htons(ETH_P_8021Q)) ? VLAN_ETH_HLEN : ETH_HLEN; |
| 103 | } |
| 104 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 105 | static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool) |
| 106 | { |
Iyappan Subramanian | 6e43462 | 2016-08-12 22:05:38 -0700 | [diff] [blame] | 107 | struct device *dev = ndev_to_dev(buf_pool->ndev); |
| 108 | struct xgene_enet_raw_desc16 *raw_desc; |
| 109 | dma_addr_t dma_addr; |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 110 | int i; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 111 | |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 112 | /* Free up the buffers held by hardware */ |
| 113 | for (i = 0; i < buf_pool->slots; i++) { |
Iyappan Subramanian | 6e43462 | 2016-08-12 22:05:38 -0700 | [diff] [blame] | 114 | if (buf_pool->rx_skb[i]) { |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 115 | dev_kfree_skb_any(buf_pool->rx_skb[i]); |
Iyappan Subramanian | 6e43462 | 2016-08-12 22:05:38 -0700 | [diff] [blame] | 116 | |
| 117 | raw_desc = &buf_pool->raw_desc16[i]; |
| 118 | dma_addr = GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)); |
| 119 | dma_unmap_single(dev, dma_addr, XGENE_ENET_MAX_MTU, |
| 120 | DMA_FROM_DEVICE); |
| 121 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 122 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | static irqreturn_t xgene_enet_rx_irq(const int irq, void *data) |
| 126 | { |
| 127 | struct xgene_enet_desc_ring *rx_ring = data; |
| 128 | |
| 129 | if (napi_schedule_prep(&rx_ring->napi)) { |
| 130 | disable_irq_nosync(irq); |
| 131 | __napi_schedule(&rx_ring->napi); |
| 132 | } |
| 133 | |
| 134 | return IRQ_HANDLED; |
| 135 | } |
| 136 | |
| 137 | static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring, |
| 138 | struct xgene_enet_raw_desc *raw_desc) |
| 139 | { |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 140 | struct xgene_enet_pdata *pdata = netdev_priv(cp_ring->ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 141 | struct sk_buff *skb; |
| 142 | struct device *dev; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 143 | skb_frag_t *frag; |
| 144 | dma_addr_t *frag_dma_addr; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 145 | u16 skb_index; |
| 146 | u8 status; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 147 | int i, ret = 0; |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 148 | u8 mss_index; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 149 | |
| 150 | skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); |
| 151 | skb = cp_ring->cp_skb[skb_index]; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 152 | frag_dma_addr = &cp_ring->frag_dma_addr[skb_index * MAX_SKB_FRAGS]; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 153 | |
| 154 | dev = ndev_to_dev(cp_ring->ndev); |
| 155 | dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)), |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 156 | skb_headlen(skb), |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 157 | DMA_TO_DEVICE); |
| 158 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 159 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| 160 | frag = &skb_shinfo(skb)->frags[i]; |
| 161 | dma_unmap_page(dev, frag_dma_addr[i], skb_frag_size(frag), |
| 162 | DMA_TO_DEVICE); |
| 163 | } |
| 164 | |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 165 | if (GET_BIT(ET, le64_to_cpu(raw_desc->m3))) { |
| 166 | mss_index = GET_VAL(MSS, le64_to_cpu(raw_desc->m3)); |
| 167 | spin_lock(&pdata->mss_lock); |
| 168 | pdata->mss_refcnt[mss_index]--; |
| 169 | spin_unlock(&pdata->mss_lock); |
| 170 | } |
| 171 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 172 | /* Checking for error */ |
| 173 | status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); |
| 174 | if (unlikely(status > 2)) { |
| 175 | xgene_enet_parse_error(cp_ring, netdev_priv(cp_ring->ndev), |
| 176 | status); |
| 177 | ret = -EIO; |
| 178 | } |
| 179 | |
| 180 | if (likely(skb)) { |
| 181 | dev_kfree_skb_any(skb); |
| 182 | } else { |
| 183 | netdev_err(cp_ring->ndev, "completion skb is NULL\n"); |
| 184 | ret = -EIO; |
| 185 | } |
| 186 | |
| 187 | return ret; |
| 188 | } |
| 189 | |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 190 | static int xgene_enet_setup_mss(struct net_device *ndev, u32 mss) |
| 191 | { |
| 192 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 193 | bool mss_index_found = false; |
| 194 | int mss_index; |
| 195 | int i; |
| 196 | |
| 197 | spin_lock(&pdata->mss_lock); |
| 198 | |
| 199 | /* Reuse the slot if MSS matches */ |
| 200 | for (i = 0; !mss_index_found && i < NUM_MSS_REG; i++) { |
| 201 | if (pdata->mss[i] == mss) { |
| 202 | pdata->mss_refcnt[i]++; |
| 203 | mss_index = i; |
| 204 | mss_index_found = true; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | /* Overwrite the slot with ref_count = 0 */ |
| 209 | for (i = 0; !mss_index_found && i < NUM_MSS_REG; i++) { |
| 210 | if (!pdata->mss_refcnt[i]) { |
| 211 | pdata->mss_refcnt[i]++; |
| 212 | pdata->mac_ops->set_mss(pdata, mss, i); |
| 213 | pdata->mss[i] = mss; |
| 214 | mss_index = i; |
| 215 | mss_index_found = true; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | spin_unlock(&pdata->mss_lock); |
| 220 | |
| 221 | /* No slots with ref_count = 0 available, return busy */ |
| 222 | if (!mss_index_found) |
| 223 | return -EBUSY; |
| 224 | |
| 225 | return mss_index; |
| 226 | } |
| 227 | |
| 228 | static int xgene_enet_work_msg(struct sk_buff *skb, u64 *hopinfo) |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 229 | { |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 230 | struct net_device *ndev = skb->dev; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 231 | struct iphdr *iph; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 232 | u8 l3hlen = 0, l4hlen = 0; |
| 233 | u8 ethhdr, proto = 0, csum_enable = 0; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 234 | u32 hdr_len, mss = 0; |
| 235 | u32 i, len, nr_frags; |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 236 | int mss_index; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 237 | |
| 238 | ethhdr = xgene_enet_hdr_len(skb->data); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 239 | |
| 240 | if (unlikely(skb->protocol != htons(ETH_P_IP)) && |
| 241 | unlikely(skb->protocol != htons(ETH_P_8021Q))) |
| 242 | goto out; |
| 243 | |
| 244 | if (unlikely(!(skb->dev->features & NETIF_F_IP_CSUM))) |
| 245 | goto out; |
| 246 | |
| 247 | iph = ip_hdr(skb); |
| 248 | if (unlikely(ip_is_fragment(iph))) |
| 249 | goto out; |
| 250 | |
| 251 | if (likely(iph->protocol == IPPROTO_TCP)) { |
| 252 | l4hlen = tcp_hdrlen(skb) >> 2; |
| 253 | csum_enable = 1; |
| 254 | proto = TSO_IPPROTO_TCP; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 255 | if (ndev->features & NETIF_F_TSO) { |
| 256 | hdr_len = ethhdr + ip_hdrlen(skb) + tcp_hdrlen(skb); |
| 257 | mss = skb_shinfo(skb)->gso_size; |
| 258 | |
| 259 | if (skb_is_nonlinear(skb)) { |
| 260 | len = skb_headlen(skb); |
| 261 | nr_frags = skb_shinfo(skb)->nr_frags; |
| 262 | |
| 263 | for (i = 0; i < 2 && i < nr_frags; i++) |
| 264 | len += skb_shinfo(skb)->frags[i].size; |
| 265 | |
| 266 | /* HW requires header must reside in 3 buffer */ |
| 267 | if (unlikely(hdr_len > len)) { |
| 268 | if (skb_linearize(skb)) |
| 269 | return 0; |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | if (!mss || ((skb->len - hdr_len) <= mss)) |
| 274 | goto out; |
| 275 | |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 276 | mss_index = xgene_enet_setup_mss(ndev, mss); |
| 277 | if (unlikely(mss_index < 0)) |
| 278 | return -EBUSY; |
| 279 | |
| 280 | *hopinfo |= SET_BIT(ET) | SET_VAL(MSS, mss_index); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 281 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 282 | } else if (iph->protocol == IPPROTO_UDP) { |
| 283 | l4hlen = UDP_HDR_SIZE; |
| 284 | csum_enable = 1; |
| 285 | } |
| 286 | out: |
| 287 | l3hlen = ip_hdrlen(skb) >> 2; |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 288 | *hopinfo |= SET_VAL(TCPHDR, l4hlen) | |
| 289 | SET_VAL(IPHDR, l3hlen) | |
| 290 | SET_VAL(ETHHDR, ethhdr) | |
| 291 | SET_VAL(EC, csum_enable) | |
| 292 | SET_VAL(IS, proto) | |
| 293 | SET_BIT(IC) | |
| 294 | SET_BIT(TYPE_ETH_WORK_MESSAGE); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 295 | |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 296 | return 0; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 297 | } |
| 298 | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 299 | static u16 xgene_enet_encode_len(u16 len) |
| 300 | { |
| 301 | return (len == BUFLEN_16K) ? 0 : len; |
| 302 | } |
| 303 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 304 | static void xgene_set_addr_len(__le64 *desc, u32 idx, dma_addr_t addr, u32 len) |
| 305 | { |
| 306 | desc[idx ^ 1] = cpu_to_le64(SET_VAL(DATAADDR, addr) | |
| 307 | SET_VAL(BUFDATALEN, len)); |
| 308 | } |
| 309 | |
| 310 | static __le64 *xgene_enet_get_exp_bufs(struct xgene_enet_desc_ring *ring) |
| 311 | { |
| 312 | __le64 *exp_bufs; |
| 313 | |
| 314 | exp_bufs = &ring->exp_bufs[ring->exp_buf_tail * MAX_EXP_BUFFS]; |
| 315 | memset(exp_bufs, 0, sizeof(__le64) * MAX_EXP_BUFFS); |
| 316 | ring->exp_buf_tail = (ring->exp_buf_tail + 1) & ((ring->slots / 2) - 1); |
| 317 | |
| 318 | return exp_bufs; |
| 319 | } |
| 320 | |
| 321 | static dma_addr_t *xgene_get_frag_dma_array(struct xgene_enet_desc_ring *ring) |
| 322 | { |
| 323 | return &ring->cp_ring->frag_dma_addr[ring->tail * MAX_SKB_FRAGS]; |
| 324 | } |
| 325 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 326 | static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring, |
| 327 | struct sk_buff *skb) |
| 328 | { |
| 329 | struct device *dev = ndev_to_dev(tx_ring->ndev); |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 330 | struct xgene_enet_pdata *pdata = netdev_priv(tx_ring->ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 331 | struct xgene_enet_raw_desc *raw_desc; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 332 | __le64 *exp_desc = NULL, *exp_bufs = NULL; |
| 333 | dma_addr_t dma_addr, pbuf_addr, *frag_dma_addr; |
| 334 | skb_frag_t *frag; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 335 | u16 tail = tx_ring->tail; |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 336 | u64 hopinfo = 0; |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 337 | u32 len, hw_len; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 338 | u8 ll = 0, nv = 0, idx = 0; |
| 339 | bool split = false; |
| 340 | u32 size, offset, ell_bytes = 0; |
| 341 | u32 i, fidx, nr_frags, count = 1; |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 342 | int ret; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 343 | |
| 344 | raw_desc = &tx_ring->raw_desc[tail]; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 345 | tail = (tail + 1) & (tx_ring->slots - 1); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 346 | memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc)); |
| 347 | |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 348 | ret = xgene_enet_work_msg(skb, &hopinfo); |
| 349 | if (ret) |
| 350 | return ret; |
| 351 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 352 | raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) | |
| 353 | hopinfo); |
| 354 | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 355 | len = skb_headlen(skb); |
| 356 | hw_len = xgene_enet_encode_len(len); |
| 357 | |
| 358 | dma_addr = dma_map_single(dev, skb->data, len, DMA_TO_DEVICE); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 359 | if (dma_mapping_error(dev, dma_addr)) { |
| 360 | netdev_err(tx_ring->ndev, "DMA mapping error\n"); |
| 361 | return -EINVAL; |
| 362 | } |
| 363 | |
| 364 | /* Hardware expects descriptor in little endian format */ |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 365 | raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 366 | SET_VAL(BUFDATALEN, hw_len) | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 367 | SET_BIT(COHERENT)); |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 368 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 369 | if (!skb_is_nonlinear(skb)) |
| 370 | goto out; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 371 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 372 | /* scatter gather */ |
| 373 | nv = 1; |
| 374 | exp_desc = (void *)&tx_ring->raw_desc[tail]; |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 375 | tail = (tail + 1) & (tx_ring->slots - 1); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 376 | memset(exp_desc, 0, sizeof(struct xgene_enet_raw_desc)); |
| 377 | |
| 378 | nr_frags = skb_shinfo(skb)->nr_frags; |
| 379 | for (i = nr_frags; i < 4 ; i++) |
| 380 | exp_desc[i ^ 1] = cpu_to_le64(LAST_BUFFER); |
| 381 | |
| 382 | frag_dma_addr = xgene_get_frag_dma_array(tx_ring); |
| 383 | |
| 384 | for (i = 0, fidx = 0; split || (fidx < nr_frags); i++) { |
| 385 | if (!split) { |
| 386 | frag = &skb_shinfo(skb)->frags[fidx]; |
| 387 | size = skb_frag_size(frag); |
| 388 | offset = 0; |
| 389 | |
| 390 | pbuf_addr = skb_frag_dma_map(dev, frag, 0, size, |
| 391 | DMA_TO_DEVICE); |
| 392 | if (dma_mapping_error(dev, pbuf_addr)) |
| 393 | return -EINVAL; |
| 394 | |
| 395 | frag_dma_addr[fidx] = pbuf_addr; |
| 396 | fidx++; |
| 397 | |
| 398 | if (size > BUFLEN_16K) |
| 399 | split = true; |
| 400 | } |
| 401 | |
| 402 | if (size > BUFLEN_16K) { |
| 403 | len = BUFLEN_16K; |
| 404 | size -= BUFLEN_16K; |
| 405 | } else { |
| 406 | len = size; |
| 407 | split = false; |
| 408 | } |
| 409 | |
| 410 | dma_addr = pbuf_addr + offset; |
| 411 | hw_len = xgene_enet_encode_len(len); |
| 412 | |
| 413 | switch (i) { |
| 414 | case 0: |
| 415 | case 1: |
| 416 | case 2: |
| 417 | xgene_set_addr_len(exp_desc, i, dma_addr, hw_len); |
| 418 | break; |
| 419 | case 3: |
| 420 | if (split || (fidx != nr_frags)) { |
| 421 | exp_bufs = xgene_enet_get_exp_bufs(tx_ring); |
| 422 | xgene_set_addr_len(exp_bufs, idx, dma_addr, |
| 423 | hw_len); |
| 424 | idx++; |
| 425 | ell_bytes += len; |
| 426 | } else { |
| 427 | xgene_set_addr_len(exp_desc, i, dma_addr, |
| 428 | hw_len); |
| 429 | } |
| 430 | break; |
| 431 | default: |
| 432 | xgene_set_addr_len(exp_bufs, idx, dma_addr, hw_len); |
| 433 | idx++; |
| 434 | ell_bytes += len; |
| 435 | break; |
| 436 | } |
| 437 | |
| 438 | if (split) |
| 439 | offset += BUFLEN_16K; |
| 440 | } |
| 441 | count++; |
| 442 | |
| 443 | if (idx) { |
| 444 | ll = 1; |
| 445 | dma_addr = dma_map_single(dev, exp_bufs, |
| 446 | sizeof(u64) * MAX_EXP_BUFFS, |
| 447 | DMA_TO_DEVICE); |
| 448 | if (dma_mapping_error(dev, dma_addr)) { |
| 449 | dev_kfree_skb_any(skb); |
| 450 | return -EINVAL; |
| 451 | } |
| 452 | i = ell_bytes >> LL_BYTES_LSB_LEN; |
| 453 | exp_desc[2] = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | |
| 454 | SET_VAL(LL_BYTES_MSB, i) | |
| 455 | SET_VAL(LL_LEN, idx)); |
| 456 | raw_desc->m2 = cpu_to_le64(SET_VAL(LL_BYTES_LSB, ell_bytes)); |
| 457 | } |
| 458 | |
| 459 | out: |
| 460 | raw_desc->m0 = cpu_to_le64(SET_VAL(LL, ll) | SET_VAL(NV, nv) | |
| 461 | SET_VAL(USERINFO, tx_ring->tail)); |
| 462 | tx_ring->cp_ring->cp_skb[tx_ring->tail] = skb; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 463 | pdata->tx_level[tx_ring->cp_ring->index] += count; |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 464 | tx_ring->tail = tail; |
| 465 | |
| 466 | return count; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, |
| 470 | struct net_device *ndev) |
| 471 | { |
| 472 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 473 | struct xgene_enet_desc_ring *tx_ring; |
| 474 | int index = skb->queue_mapping; |
| 475 | u32 tx_level = pdata->tx_level[index]; |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 476 | int count; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 477 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 478 | tx_ring = pdata->tx_ring[index]; |
| 479 | if (tx_level < pdata->txc_level[index]) |
| 480 | tx_level += ((typeof(pdata->tx_level[index]))~0U); |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 481 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 482 | if ((tx_level - pdata->txc_level[index]) > pdata->tx_qcnt_hi) { |
| 483 | netif_stop_subqueue(ndev, index); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 484 | return NETDEV_TX_BUSY; |
| 485 | } |
| 486 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 487 | if (skb_padto(skb, XGENE_MIN_ENET_FRAME_SIZE)) |
| 488 | return NETDEV_TX_OK; |
| 489 | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 490 | count = xgene_enet_setup_tx_desc(tx_ring, skb); |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 491 | if (count == -EBUSY) |
| 492 | return NETDEV_TX_BUSY; |
| 493 | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 494 | if (count <= 0) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 495 | dev_kfree_skb_any(skb); |
| 496 | return NETDEV_TX_OK; |
| 497 | } |
| 498 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 499 | skb_tx_timestamp(skb); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 500 | |
Iyappan Subramanian | 3bb502f | 2016-05-13 16:53:00 -0700 | [diff] [blame] | 501 | tx_ring->tx_packets++; |
| 502 | tx_ring->tx_bytes += skb->len; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 503 | |
Eric Dumazet | 9ffad80 | 2015-11-25 09:02:10 -0800 | [diff] [blame] | 504 | pdata->ring_ops->wr_cmd(tx_ring, count); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 505 | return NETDEV_TX_OK; |
| 506 | } |
| 507 | |
Iyappan Subramanian | 671eeac | 2017-03-15 13:27:18 -0700 | [diff] [blame] | 508 | static void xgene_enet_rx_csum(struct sk_buff *skb) |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 509 | { |
Iyappan Subramanian | 671eeac | 2017-03-15 13:27:18 -0700 | [diff] [blame] | 510 | struct net_device *ndev = skb->dev; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 511 | struct iphdr *iph = ip_hdr(skb); |
| 512 | |
Iyappan Subramanian | 671eeac | 2017-03-15 13:27:18 -0700 | [diff] [blame] | 513 | if (!(ndev->features & NETIF_F_RXCSUM)) |
| 514 | return; |
| 515 | |
| 516 | if (skb->protocol != htons(ETH_P_IP)) |
| 517 | return; |
| 518 | |
| 519 | if (ip_is_fragment(iph)) |
| 520 | return; |
| 521 | |
| 522 | if (iph->protocol != IPPROTO_TCP && iph->protocol != IPPROTO_UDP) |
| 523 | return; |
| 524 | |
| 525 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, |
| 529 | struct xgene_enet_raw_desc *raw_desc) |
| 530 | { |
| 531 | struct net_device *ndev; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 532 | struct device *dev; |
| 533 | struct xgene_enet_desc_ring *buf_pool; |
| 534 | u32 datalen, skb_index; |
| 535 | struct sk_buff *skb; |
| 536 | u8 status; |
| 537 | int ret = 0; |
| 538 | |
| 539 | ndev = rx_ring->ndev; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 540 | dev = ndev_to_dev(rx_ring->ndev); |
| 541 | buf_pool = rx_ring->buf_pool; |
| 542 | |
| 543 | dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)), |
| 544 | XGENE_ENET_MAX_MTU, DMA_FROM_DEVICE); |
| 545 | skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); |
| 546 | skb = buf_pool->rx_skb[skb_index]; |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 547 | buf_pool->rx_skb[skb_index] = NULL; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 548 | |
| 549 | /* checking for error */ |
Quan Nguyen | 67622b8 | 2017-03-15 13:27:17 -0700 | [diff] [blame] | 550 | status = (GET_VAL(ELERR, le64_to_cpu(raw_desc->m0)) << LERR_LEN) | |
Iyappan Subramanian | 3bb502f | 2016-05-13 16:53:00 -0700 | [diff] [blame] | 551 | GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); |
Quan Nguyen | 67622b8 | 2017-03-15 13:27:17 -0700 | [diff] [blame] | 552 | if (unlikely(status)) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 553 | dev_kfree_skb_any(skb); |
| 554 | xgene_enet_parse_error(rx_ring, netdev_priv(rx_ring->ndev), |
| 555 | status); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 556 | ret = -EIO; |
| 557 | goto out; |
| 558 | } |
| 559 | |
| 560 | /* strip off CRC as HW isn't doing this */ |
| 561 | datalen = GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1)); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 562 | datalen = (datalen & DATALEN_MASK) - 4; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 563 | prefetch(skb->data - NET_IP_ALIGN); |
| 564 | skb_put(skb, datalen); |
| 565 | |
| 566 | skb_checksum_none_assert(skb); |
| 567 | skb->protocol = eth_type_trans(skb, ndev); |
Iyappan Subramanian | 671eeac | 2017-03-15 13:27:18 -0700 | [diff] [blame] | 568 | xgene_enet_rx_csum(skb); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 569 | |
Iyappan Subramanian | 3bb502f | 2016-05-13 16:53:00 -0700 | [diff] [blame] | 570 | rx_ring->rx_packets++; |
| 571 | rx_ring->rx_bytes += datalen; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 572 | napi_gro_receive(&rx_ring->napi, skb); |
| 573 | out: |
| 574 | if (--rx_ring->nbufpool == 0) { |
| 575 | ret = xgene_enet_refill_bufpool(buf_pool, NUM_BUFPOOL); |
| 576 | rx_ring->nbufpool = NUM_BUFPOOL; |
| 577 | } |
| 578 | |
| 579 | return ret; |
| 580 | } |
| 581 | |
| 582 | static bool is_rx_desc(struct xgene_enet_raw_desc *raw_desc) |
| 583 | { |
| 584 | return GET_VAL(FPQNUM, le64_to_cpu(raw_desc->m0)) ? true : false; |
| 585 | } |
| 586 | |
| 587 | static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring, |
| 588 | int budget) |
| 589 | { |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 590 | struct net_device *ndev = ring->ndev; |
| 591 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 592 | struct xgene_enet_raw_desc *raw_desc, *exp_desc; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 593 | u16 head = ring->head; |
| 594 | u16 slots = ring->slots - 1; |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 595 | int ret, desc_count, count = 0, processed = 0; |
| 596 | bool is_completion; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 597 | |
| 598 | do { |
| 599 | raw_desc = &ring->raw_desc[head]; |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 600 | desc_count = 0; |
| 601 | is_completion = false; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 602 | exp_desc = NULL; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 603 | if (unlikely(xgene_enet_is_desc_slot_empty(raw_desc))) |
| 604 | break; |
| 605 | |
Iyappan Subramanian | ecf6ba8 | 2015-01-29 14:38:23 -0800 | [diff] [blame] | 606 | /* read fpqnum field after dataaddr field */ |
| 607 | dma_rmb(); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 608 | if (GET_BIT(NV, le64_to_cpu(raw_desc->m0))) { |
| 609 | head = (head + 1) & slots; |
| 610 | exp_desc = &ring->raw_desc[head]; |
| 611 | |
| 612 | if (unlikely(xgene_enet_is_desc_slot_empty(exp_desc))) { |
| 613 | head = (head - 1) & slots; |
| 614 | break; |
| 615 | } |
| 616 | dma_rmb(); |
| 617 | count++; |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 618 | desc_count++; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 619 | } |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 620 | if (is_rx_desc(raw_desc)) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 621 | ret = xgene_enet_rx_frame(ring, raw_desc); |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 622 | } else { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 623 | ret = xgene_enet_tx_completion(ring, raw_desc); |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 624 | is_completion = true; |
| 625 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 626 | xgene_enet_mark_desc_slot_empty(raw_desc); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 627 | if (exp_desc) |
| 628 | xgene_enet_mark_desc_slot_empty(exp_desc); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 629 | |
| 630 | head = (head + 1) & slots; |
| 631 | count++; |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 632 | desc_count++; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 633 | processed++; |
Iyappan Subramanian | 67894ee | 2015-12-16 22:26:05 -0800 | [diff] [blame] | 634 | if (is_completion) |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 635 | pdata->txc_level[ring->index] += desc_count; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 636 | |
| 637 | if (ret) |
| 638 | break; |
| 639 | } while (--budget); |
| 640 | |
| 641 | if (likely(count)) { |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 642 | pdata->ring_ops->wr_cmd(ring, -count); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 643 | ring->head = head; |
| 644 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 645 | if (__netif_subqueue_stopped(ndev, ring->index)) |
| 646 | netif_start_subqueue(ndev, ring->index); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 647 | } |
| 648 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 649 | return processed; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 650 | } |
| 651 | |
| 652 | static int xgene_enet_napi(struct napi_struct *napi, const int budget) |
| 653 | { |
| 654 | struct xgene_enet_desc_ring *ring; |
| 655 | int processed; |
| 656 | |
| 657 | ring = container_of(napi, struct xgene_enet_desc_ring, napi); |
| 658 | processed = xgene_enet_process_ring(ring, budget); |
| 659 | |
| 660 | if (processed != budget) { |
| 661 | napi_complete(napi); |
| 662 | enable_irq(ring->irq); |
| 663 | } |
| 664 | |
| 665 | return processed; |
| 666 | } |
| 667 | |
| 668 | static void xgene_enet_timeout(struct net_device *ndev) |
| 669 | { |
| 670 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 671 | struct netdev_queue *txq; |
| 672 | int i; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 673 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 674 | pdata->mac_ops->reset(pdata); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 675 | |
| 676 | for (i = 0; i < pdata->txq_cnt; i++) { |
| 677 | txq = netdev_get_tx_queue(ndev, i); |
| 678 | txq->trans_start = jiffies; |
| 679 | netif_tx_start_queue(txq); |
| 680 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 681 | } |
| 682 | |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 683 | static void xgene_enet_set_irq_name(struct net_device *ndev) |
| 684 | { |
| 685 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 686 | struct xgene_enet_desc_ring *ring; |
| 687 | int i; |
| 688 | |
| 689 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 690 | ring = pdata->rx_ring[i]; |
| 691 | if (!pdata->cq_cnt) { |
| 692 | snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-rx-txc", |
| 693 | ndev->name); |
| 694 | } else { |
| 695 | snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-rx-%d", |
| 696 | ndev->name, i); |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | for (i = 0; i < pdata->cq_cnt; i++) { |
| 701 | ring = pdata->tx_ring[i]->cp_ring; |
| 702 | snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-txc-%d", |
| 703 | ndev->name, i); |
| 704 | } |
| 705 | } |
| 706 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 707 | static int xgene_enet_register_irq(struct net_device *ndev) |
| 708 | { |
| 709 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 710 | struct device *dev = ndev_to_dev(ndev); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 711 | struct xgene_enet_desc_ring *ring; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 712 | int ret = 0, i; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 713 | |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 714 | xgene_enet_set_irq_name(ndev); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 715 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 716 | ring = pdata->rx_ring[i]; |
| 717 | irq_set_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); |
| 718 | ret = devm_request_irq(dev, ring->irq, xgene_enet_rx_irq, |
Iyappan Subramanian | 46a22d2 | 2016-05-13 16:52:58 -0700 | [diff] [blame] | 719 | 0, ring->irq_name, ring); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 720 | if (ret) { |
| 721 | netdev_err(ndev, "Failed to request irq %s\n", |
| 722 | ring->irq_name); |
| 723 | } |
| 724 | } |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 725 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 726 | for (i = 0; i < pdata->cq_cnt; i++) { |
| 727 | ring = pdata->tx_ring[i]->cp_ring; |
Iyappan Subramanian | b5d7a06 | 2016-01-21 16:07:41 -0800 | [diff] [blame] | 728 | irq_set_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 729 | ret = devm_request_irq(dev, ring->irq, xgene_enet_rx_irq, |
Iyappan Subramanian | 46a22d2 | 2016-05-13 16:52:58 -0700 | [diff] [blame] | 730 | 0, ring->irq_name, ring); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 731 | if (ret) { |
| 732 | netdev_err(ndev, "Failed to request irq %s\n", |
| 733 | ring->irq_name); |
| 734 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 735 | } |
| 736 | |
| 737 | return ret; |
| 738 | } |
| 739 | |
| 740 | static void xgene_enet_free_irq(struct net_device *ndev) |
| 741 | { |
| 742 | struct xgene_enet_pdata *pdata; |
Iyappan Subramanian | b5d7a06 | 2016-01-21 16:07:41 -0800 | [diff] [blame] | 743 | struct xgene_enet_desc_ring *ring; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 744 | struct device *dev; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 745 | int i; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 746 | |
| 747 | pdata = netdev_priv(ndev); |
| 748 | dev = ndev_to_dev(ndev); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 749 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 750 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 751 | ring = pdata->rx_ring[i]; |
| 752 | irq_clear_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); |
| 753 | devm_free_irq(dev, ring->irq, ring); |
| 754 | } |
| 755 | |
| 756 | for (i = 0; i < pdata->cq_cnt; i++) { |
| 757 | ring = pdata->tx_ring[i]->cp_ring; |
Iyappan Subramanian | b5d7a06 | 2016-01-21 16:07:41 -0800 | [diff] [blame] | 758 | irq_clear_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); |
| 759 | devm_free_irq(dev, ring->irq, ring); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 760 | } |
| 761 | } |
| 762 | |
| 763 | static void xgene_enet_napi_enable(struct xgene_enet_pdata *pdata) |
| 764 | { |
| 765 | struct napi_struct *napi; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 766 | int i; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 767 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 768 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 769 | napi = &pdata->rx_ring[i]->napi; |
| 770 | napi_enable(napi); |
| 771 | } |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 772 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 773 | for (i = 0; i < pdata->cq_cnt; i++) { |
| 774 | napi = &pdata->tx_ring[i]->cp_ring->napi; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 775 | napi_enable(napi); |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | static void xgene_enet_napi_disable(struct xgene_enet_pdata *pdata) |
| 780 | { |
| 781 | struct napi_struct *napi; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 782 | int i; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 783 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 784 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 785 | napi = &pdata->rx_ring[i]->napi; |
| 786 | napi_disable(napi); |
| 787 | } |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 788 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 789 | for (i = 0; i < pdata->cq_cnt; i++) { |
| 790 | napi = &pdata->tx_ring[i]->cp_ring->napi; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 791 | napi_disable(napi); |
| 792 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | static int xgene_enet_open(struct net_device *ndev) |
| 796 | { |
| 797 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
Julia Lawall | 3cdb730 | 2015-12-08 21:18:25 +0100 | [diff] [blame] | 798 | const struct xgene_mac_ops *mac_ops = pdata->mac_ops; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 799 | int ret; |
| 800 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 801 | ret = netif_set_real_num_tx_queues(ndev, pdata->txq_cnt); |
| 802 | if (ret) |
| 803 | return ret; |
| 804 | |
| 805 | ret = netif_set_real_num_rx_queues(ndev, pdata->rxq_cnt); |
| 806 | if (ret) |
| 807 | return ret; |
| 808 | |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame] | 809 | xgene_enet_napi_enable(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 810 | ret = xgene_enet_register_irq(ndev); |
| 811 | if (ret) |
| 812 | return ret; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 813 | |
Philippe Reynes | 971d3a4 | 2016-09-11 17:54:03 +0200 | [diff] [blame] | 814 | if (ndev->phydev) { |
| 815 | phy_start(ndev->phydev); |
Iyappan Subramanian | 47c62b6 | 2016-07-25 17:12:42 -0700 | [diff] [blame] | 816 | } else { |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 817 | schedule_delayed_work(&pdata->link_work, PHY_POLL_LINK_OFF); |
Iyappan Subramanian | 9a8c5dd | 2016-07-25 17:12:36 -0700 | [diff] [blame] | 818 | netif_carrier_off(ndev); |
| 819 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 820 | |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 821 | mac_ops->tx_enable(pdata); |
| 822 | mac_ops->rx_enable(pdata); |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 823 | netif_tx_start_all_queues(ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 824 | |
| 825 | return ret; |
| 826 | } |
| 827 | |
| 828 | static int xgene_enet_close(struct net_device *ndev) |
| 829 | { |
| 830 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
Julia Lawall | 3cdb730 | 2015-12-08 21:18:25 +0100 | [diff] [blame] | 831 | const struct xgene_mac_ops *mac_ops = pdata->mac_ops; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 832 | int i; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 833 | |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 834 | netif_tx_stop_all_queues(ndev); |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 835 | mac_ops->tx_disable(pdata); |
| 836 | mac_ops->rx_disable(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 837 | |
Philippe Reynes | 971d3a4 | 2016-09-11 17:54:03 +0200 | [diff] [blame] | 838 | if (ndev->phydev) |
| 839 | phy_stop(ndev->phydev); |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 840 | else |
| 841 | cancel_delayed_work_sync(&pdata->link_work); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 842 | |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame] | 843 | xgene_enet_free_irq(ndev); |
| 844 | xgene_enet_napi_disable(pdata); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 845 | for (i = 0; i < pdata->rxq_cnt; i++) |
| 846 | xgene_enet_process_ring(pdata->rx_ring[i], -1); |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame] | 847 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 848 | return 0; |
| 849 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 850 | static void xgene_enet_delete_ring(struct xgene_enet_desc_ring *ring) |
| 851 | { |
| 852 | struct xgene_enet_pdata *pdata; |
| 853 | struct device *dev; |
| 854 | |
| 855 | pdata = netdev_priv(ring->ndev); |
| 856 | dev = ndev_to_dev(ring->ndev); |
| 857 | |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 858 | pdata->ring_ops->clear(ring); |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 859 | dmam_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 860 | } |
| 861 | |
| 862 | static void xgene_enet_delete_desc_rings(struct xgene_enet_pdata *pdata) |
| 863 | { |
| 864 | struct xgene_enet_desc_ring *buf_pool; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 865 | struct xgene_enet_desc_ring *ring; |
| 866 | int i; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 867 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 868 | for (i = 0; i < pdata->txq_cnt; i++) { |
| 869 | ring = pdata->tx_ring[i]; |
| 870 | if (ring) { |
| 871 | xgene_enet_delete_ring(ring); |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 872 | pdata->port_ops->clear(pdata, ring); |
| 873 | if (pdata->cq_cnt) |
| 874 | xgene_enet_delete_ring(ring->cp_ring); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 875 | pdata->tx_ring[i] = NULL; |
| 876 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 877 | } |
| 878 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 879 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 880 | ring = pdata->rx_ring[i]; |
| 881 | if (ring) { |
| 882 | buf_pool = ring->buf_pool; |
| 883 | xgene_enet_delete_bufpool(buf_pool); |
| 884 | xgene_enet_delete_ring(buf_pool); |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 885 | pdata->port_ops->clear(pdata, buf_pool); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 886 | xgene_enet_delete_ring(ring); |
| 887 | pdata->rx_ring[i] = NULL; |
| 888 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 889 | } |
| 890 | } |
| 891 | |
| 892 | static int xgene_enet_get_ring_size(struct device *dev, |
| 893 | enum xgene_enet_ring_cfgsize cfgsize) |
| 894 | { |
| 895 | int size = -EINVAL; |
| 896 | |
| 897 | switch (cfgsize) { |
| 898 | case RING_CFGSIZE_512B: |
| 899 | size = 0x200; |
| 900 | break; |
| 901 | case RING_CFGSIZE_2KB: |
| 902 | size = 0x800; |
| 903 | break; |
| 904 | case RING_CFGSIZE_16KB: |
| 905 | size = 0x4000; |
| 906 | break; |
| 907 | case RING_CFGSIZE_64KB: |
| 908 | size = 0x10000; |
| 909 | break; |
| 910 | case RING_CFGSIZE_512KB: |
| 911 | size = 0x80000; |
| 912 | break; |
| 913 | default: |
| 914 | dev_err(dev, "Unsupported cfg ring size %d\n", cfgsize); |
| 915 | break; |
| 916 | } |
| 917 | |
| 918 | return size; |
| 919 | } |
| 920 | |
| 921 | static void xgene_enet_free_desc_ring(struct xgene_enet_desc_ring *ring) |
| 922 | { |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 923 | struct xgene_enet_pdata *pdata; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 924 | struct device *dev; |
| 925 | |
| 926 | if (!ring) |
| 927 | return; |
| 928 | |
| 929 | dev = ndev_to_dev(ring->ndev); |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 930 | pdata = netdev_priv(ring->ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 931 | |
| 932 | if (ring->desc_addr) { |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 933 | pdata->ring_ops->clear(ring); |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 934 | dmam_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 935 | } |
| 936 | devm_kfree(dev, ring); |
| 937 | } |
| 938 | |
| 939 | static void xgene_enet_free_desc_rings(struct xgene_enet_pdata *pdata) |
| 940 | { |
| 941 | struct device *dev = &pdata->pdev->dev; |
| 942 | struct xgene_enet_desc_ring *ring; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 943 | int i; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 944 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 945 | for (i = 0; i < pdata->txq_cnt; i++) { |
| 946 | ring = pdata->tx_ring[i]; |
| 947 | if (ring) { |
| 948 | if (ring->cp_ring && ring->cp_ring->cp_skb) |
| 949 | devm_kfree(dev, ring->cp_ring->cp_skb); |
| 950 | if (ring->cp_ring && pdata->cq_cnt) |
| 951 | xgene_enet_free_desc_ring(ring->cp_ring); |
| 952 | xgene_enet_free_desc_ring(ring); |
| 953 | } |
Iyappan Subramanian | c10e4ca | 2014-08-21 13:44:48 -0700 | [diff] [blame] | 954 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 955 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 956 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 957 | ring = pdata->rx_ring[i]; |
| 958 | if (ring) { |
| 959 | if (ring->buf_pool) { |
| 960 | if (ring->buf_pool->rx_skb) |
| 961 | devm_kfree(dev, ring->buf_pool->rx_skb); |
| 962 | xgene_enet_free_desc_ring(ring->buf_pool); |
| 963 | } |
| 964 | xgene_enet_free_desc_ring(ring); |
Iyappan Subramanian | c10e4ca | 2014-08-21 13:44:48 -0700 | [diff] [blame] | 965 | } |
Iyappan Subramanian | c10e4ca | 2014-08-21 13:44:48 -0700 | [diff] [blame] | 966 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 967 | } |
| 968 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 969 | static bool is_irq_mbox_required(struct xgene_enet_pdata *pdata, |
| 970 | struct xgene_enet_desc_ring *ring) |
| 971 | { |
| 972 | if ((pdata->enet_id == XGENE_ENET2) && |
| 973 | (xgene_enet_ring_owner(ring->id) == RING_OWNER_CPU)) { |
| 974 | return true; |
| 975 | } |
| 976 | |
| 977 | return false; |
| 978 | } |
| 979 | |
| 980 | static void __iomem *xgene_enet_ring_cmd_base(struct xgene_enet_pdata *pdata, |
| 981 | struct xgene_enet_desc_ring *ring) |
| 982 | { |
| 983 | u8 num_ring_id_shift = pdata->ring_ops->num_ring_id_shift; |
| 984 | |
| 985 | return pdata->ring_cmd_addr + (ring->num << num_ring_id_shift); |
| 986 | } |
| 987 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 988 | static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring( |
| 989 | struct net_device *ndev, u32 ring_num, |
| 990 | enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id) |
| 991 | { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 992 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 993 | struct device *dev = ndev_to_dev(ndev); |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 994 | struct xgene_enet_desc_ring *ring; |
| 995 | void *irq_mbox_addr; |
Tobias Klauser | 9b9ba82 | 2014-08-14 13:59:42 +0200 | [diff] [blame] | 996 | int size; |
| 997 | |
| 998 | size = xgene_enet_get_ring_size(dev, cfgsize); |
| 999 | if (size < 0) |
| 1000 | return NULL; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1001 | |
| 1002 | ring = devm_kzalloc(dev, sizeof(struct xgene_enet_desc_ring), |
| 1003 | GFP_KERNEL); |
| 1004 | if (!ring) |
| 1005 | return NULL; |
| 1006 | |
| 1007 | ring->ndev = ndev; |
| 1008 | ring->num = ring_num; |
| 1009 | ring->cfgsize = cfgsize; |
| 1010 | ring->id = ring_id; |
| 1011 | |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1012 | ring->desc_addr = dmam_alloc_coherent(dev, size, &ring->dma, |
| 1013 | GFP_KERNEL | __GFP_ZERO); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1014 | if (!ring->desc_addr) { |
| 1015 | devm_kfree(dev, ring); |
| 1016 | return NULL; |
| 1017 | } |
| 1018 | ring->size = size; |
| 1019 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1020 | if (is_irq_mbox_required(pdata, ring)) { |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1021 | irq_mbox_addr = dmam_alloc_coherent(dev, INTR_MBOX_SIZE, |
| 1022 | &ring->irq_mbox_dma, |
| 1023 | GFP_KERNEL | __GFP_ZERO); |
| 1024 | if (!irq_mbox_addr) { |
| 1025 | dmam_free_coherent(dev, size, ring->desc_addr, |
| 1026 | ring->dma); |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1027 | devm_kfree(dev, ring); |
| 1028 | return NULL; |
| 1029 | } |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1030 | ring->irq_mbox_addr = irq_mbox_addr; |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | ring->cmd_base = xgene_enet_ring_cmd_base(pdata, ring); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1034 | ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR; |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 1035 | ring = pdata->ring_ops->setup(ring); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1036 | netdev_dbg(ndev, "ring info: num=%d size=%d id=%d slots=%d\n", |
| 1037 | ring->num, ring->size, ring->id, ring->slots); |
| 1038 | |
| 1039 | return ring; |
| 1040 | } |
| 1041 | |
| 1042 | static u16 xgene_enet_get_ring_id(enum xgene_ring_owner owner, u8 bufnum) |
| 1043 | { |
| 1044 | return (owner << 6) | (bufnum & GENMASK(5, 0)); |
| 1045 | } |
| 1046 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1047 | static enum xgene_ring_owner xgene_derive_ring_owner(struct xgene_enet_pdata *p) |
| 1048 | { |
| 1049 | enum xgene_ring_owner owner; |
| 1050 | |
| 1051 | if (p->enet_id == XGENE_ENET1) { |
| 1052 | switch (p->phy_mode) { |
| 1053 | case PHY_INTERFACE_MODE_SGMII: |
| 1054 | owner = RING_OWNER_ETH0; |
| 1055 | break; |
| 1056 | default: |
| 1057 | owner = (!p->port_id) ? RING_OWNER_ETH0 : |
| 1058 | RING_OWNER_ETH1; |
| 1059 | break; |
| 1060 | } |
| 1061 | } else { |
| 1062 | owner = (!p->port_id) ? RING_OWNER_ETH0 : RING_OWNER_ETH1; |
| 1063 | } |
| 1064 | |
| 1065 | return owner; |
| 1066 | } |
| 1067 | |
Iyappan Subramanian | 2a37daa | 2016-04-29 11:10:13 -0700 | [diff] [blame] | 1068 | static u8 xgene_start_cpu_bufnum(struct xgene_enet_pdata *pdata) |
| 1069 | { |
| 1070 | struct device *dev = &pdata->pdev->dev; |
| 1071 | u32 cpu_bufnum; |
| 1072 | int ret; |
| 1073 | |
| 1074 | ret = device_property_read_u32(dev, "channel", &cpu_bufnum); |
| 1075 | |
| 1076 | return (!ret) ? cpu_bufnum : pdata->cpu_bufnum; |
| 1077 | } |
| 1078 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1079 | static int xgene_enet_create_desc_rings(struct net_device *ndev) |
| 1080 | { |
| 1081 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 1082 | struct device *dev = ndev_to_dev(ndev); |
| 1083 | struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring; |
| 1084 | struct xgene_enet_desc_ring *buf_pool = NULL; |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1085 | enum xgene_ring_owner owner; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 1086 | dma_addr_t dma_exp_bufs; |
Iyappan Subramanian | 2a37daa | 2016-04-29 11:10:13 -0700 | [diff] [blame] | 1087 | u8 cpu_bufnum; |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1088 | u8 eth_bufnum = pdata->eth_bufnum; |
| 1089 | u8 bp_bufnum = pdata->bp_bufnum; |
| 1090 | u16 ring_num = pdata->ring_num; |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1091 | __le64 *exp_bufs; |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1092 | u16 ring_id; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1093 | int i, ret, size; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1094 | |
Iyappan Subramanian | 2a37daa | 2016-04-29 11:10:13 -0700 | [diff] [blame] | 1095 | cpu_bufnum = xgene_start_cpu_bufnum(pdata); |
| 1096 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1097 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 1098 | /* allocate rx descriptor ring */ |
| 1099 | owner = xgene_derive_ring_owner(pdata); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1100 | ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, cpu_bufnum++); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1101 | rx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1102 | RING_CFGSIZE_16KB, |
| 1103 | ring_id); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1104 | if (!rx_ring) { |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1105 | ret = -ENOMEM; |
| 1106 | goto err; |
| 1107 | } |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1108 | |
| 1109 | /* allocate buffer pool for receiving packets */ |
| 1110 | owner = xgene_derive_ring_owner(pdata); |
| 1111 | ring_id = xgene_enet_get_ring_id(owner, bp_bufnum++); |
| 1112 | buf_pool = xgene_enet_create_desc_ring(ndev, ring_num++, |
| 1113 | RING_CFGSIZE_2KB, |
| 1114 | ring_id); |
| 1115 | if (!buf_pool) { |
| 1116 | ret = -ENOMEM; |
| 1117 | goto err; |
| 1118 | } |
| 1119 | |
| 1120 | rx_ring->nbufpool = NUM_BUFPOOL; |
| 1121 | rx_ring->buf_pool = buf_pool; |
| 1122 | rx_ring->irq = pdata->irqs[i]; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1123 | buf_pool->rx_skb = devm_kcalloc(dev, buf_pool->slots, |
| 1124 | sizeof(struct sk_buff *), |
| 1125 | GFP_KERNEL); |
| 1126 | if (!buf_pool->rx_skb) { |
| 1127 | ret = -ENOMEM; |
| 1128 | goto err; |
| 1129 | } |
| 1130 | |
| 1131 | buf_pool->dst_ring_num = xgene_enet_dst_ring_num(buf_pool); |
| 1132 | rx_ring->buf_pool = buf_pool; |
| 1133 | pdata->rx_ring[i] = rx_ring; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1134 | } |
| 1135 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1136 | for (i = 0; i < pdata->txq_cnt; i++) { |
| 1137 | /* allocate tx descriptor ring */ |
| 1138 | owner = xgene_derive_ring_owner(pdata); |
| 1139 | ring_id = xgene_enet_get_ring_id(owner, eth_bufnum++); |
| 1140 | tx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, |
| 1141 | RING_CFGSIZE_16KB, |
| 1142 | ring_id); |
| 1143 | if (!tx_ring) { |
| 1144 | ret = -ENOMEM; |
| 1145 | goto err; |
| 1146 | } |
| 1147 | |
| 1148 | size = (tx_ring->slots / 2) * sizeof(__le64) * MAX_EXP_BUFFS; |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1149 | exp_bufs = dmam_alloc_coherent(dev, size, &dma_exp_bufs, |
| 1150 | GFP_KERNEL | __GFP_ZERO); |
| 1151 | if (!exp_bufs) { |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1152 | ret = -ENOMEM; |
| 1153 | goto err; |
| 1154 | } |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1155 | tx_ring->exp_bufs = exp_bufs; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1156 | |
| 1157 | pdata->tx_ring[i] = tx_ring; |
| 1158 | |
| 1159 | if (!pdata->cq_cnt) { |
| 1160 | cp_ring = pdata->rx_ring[i]; |
| 1161 | } else { |
| 1162 | /* allocate tx completion descriptor ring */ |
| 1163 | ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, |
| 1164 | cpu_bufnum++); |
| 1165 | cp_ring = xgene_enet_create_desc_ring(ndev, ring_num++, |
| 1166 | RING_CFGSIZE_16KB, |
| 1167 | ring_id); |
| 1168 | if (!cp_ring) { |
| 1169 | ret = -ENOMEM; |
| 1170 | goto err; |
| 1171 | } |
| 1172 | |
| 1173 | cp_ring->irq = pdata->irqs[pdata->rxq_cnt + i]; |
| 1174 | cp_ring->index = i; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1175 | } |
| 1176 | |
| 1177 | cp_ring->cp_skb = devm_kcalloc(dev, tx_ring->slots, |
| 1178 | sizeof(struct sk_buff *), |
| 1179 | GFP_KERNEL); |
| 1180 | if (!cp_ring->cp_skb) { |
| 1181 | ret = -ENOMEM; |
| 1182 | goto err; |
| 1183 | } |
| 1184 | |
| 1185 | size = sizeof(dma_addr_t) * MAX_SKB_FRAGS; |
| 1186 | cp_ring->frag_dma_addr = devm_kcalloc(dev, tx_ring->slots, |
| 1187 | size, GFP_KERNEL); |
| 1188 | if (!cp_ring->frag_dma_addr) { |
| 1189 | devm_kfree(dev, cp_ring->cp_skb); |
| 1190 | ret = -ENOMEM; |
| 1191 | goto err; |
| 1192 | } |
| 1193 | |
| 1194 | tx_ring->cp_ring = cp_ring; |
| 1195 | tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1196 | } |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 1197 | |
Iyappan Subramanian | b5a4a3e | 2016-10-31 16:00:26 -0700 | [diff] [blame] | 1198 | if (pdata->ring_ops->coalesce) |
| 1199 | pdata->ring_ops->coalesce(pdata->tx_ring[0]); |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1200 | pdata->tx_qcnt_hi = pdata->tx_ring[0]->slots - 128; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1201 | |
| 1202 | return 0; |
| 1203 | |
| 1204 | err: |
| 1205 | xgene_enet_free_desc_rings(pdata); |
| 1206 | return ret; |
| 1207 | } |
| 1208 | |
| 1209 | static struct rtnl_link_stats64 *xgene_enet_get_stats64( |
| 1210 | struct net_device *ndev, |
| 1211 | struct rtnl_link_stats64 *storage) |
| 1212 | { |
| 1213 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 1214 | struct rtnl_link_stats64 *stats = &pdata->stats; |
Iyappan Subramanian | 3bb502f | 2016-05-13 16:53:00 -0700 | [diff] [blame] | 1215 | struct xgene_enet_desc_ring *ring; |
| 1216 | int i; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1217 | |
Iyappan Subramanian | 3bb502f | 2016-05-13 16:53:00 -0700 | [diff] [blame] | 1218 | memset(stats, 0, sizeof(struct rtnl_link_stats64)); |
| 1219 | for (i = 0; i < pdata->txq_cnt; i++) { |
| 1220 | ring = pdata->tx_ring[i]; |
| 1221 | if (ring) { |
| 1222 | stats->tx_packets += ring->tx_packets; |
| 1223 | stats->tx_bytes += ring->tx_bytes; |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 1228 | ring = pdata->rx_ring[i]; |
| 1229 | if (ring) { |
| 1230 | stats->rx_packets += ring->rx_packets; |
| 1231 | stats->rx_bytes += ring->rx_bytes; |
| 1232 | stats->rx_errors += ring->rx_length_errors + |
| 1233 | ring->rx_crc_errors + |
| 1234 | ring->rx_frame_errors + |
| 1235 | ring->rx_fifo_errors; |
| 1236 | stats->rx_dropped += ring->rx_dropped; |
| 1237 | } |
| 1238 | } |
| 1239 | memcpy(storage, stats, sizeof(struct rtnl_link_stats64)); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1240 | |
| 1241 | return storage; |
| 1242 | } |
| 1243 | |
| 1244 | static int xgene_enet_set_mac_address(struct net_device *ndev, void *addr) |
| 1245 | { |
| 1246 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 1247 | int ret; |
| 1248 | |
| 1249 | ret = eth_mac_addr(ndev, addr); |
| 1250 | if (ret) |
| 1251 | return ret; |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1252 | pdata->mac_ops->set_mac_addr(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1253 | |
| 1254 | return ret; |
| 1255 | } |
| 1256 | |
| 1257 | static const struct net_device_ops xgene_ndev_ops = { |
| 1258 | .ndo_open = xgene_enet_open, |
| 1259 | .ndo_stop = xgene_enet_close, |
| 1260 | .ndo_start_xmit = xgene_enet_start_xmit, |
| 1261 | .ndo_tx_timeout = xgene_enet_timeout, |
| 1262 | .ndo_get_stats64 = xgene_enet_get_stats64, |
| 1263 | .ndo_change_mtu = eth_change_mtu, |
| 1264 | .ndo_set_mac_address = xgene_enet_set_mac_address, |
| 1265 | }; |
| 1266 | |
Stephen Rothwell | 8beeef8 | 2015-06-24 17:29:51 +1000 | [diff] [blame] | 1267 | #ifdef CONFIG_ACPI |
Saurabh Sengar | 724fe69 | 2015-11-23 19:02:15 +0530 | [diff] [blame] | 1268 | static void xgene_get_port_id_acpi(struct device *dev, |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1269 | struct xgene_enet_pdata *pdata) |
| 1270 | { |
| 1271 | acpi_status status; |
| 1272 | u64 temp; |
| 1273 | |
| 1274 | status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_SUN", NULL, &temp); |
| 1275 | if (ACPI_FAILURE(status)) { |
| 1276 | pdata->port_id = 0; |
| 1277 | } else { |
| 1278 | pdata->port_id = temp; |
| 1279 | } |
| 1280 | |
Saurabh Sengar | 724fe69 | 2015-11-23 19:02:15 +0530 | [diff] [blame] | 1281 | return; |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1282 | } |
Stephen Rothwell | 8beeef8 | 2015-06-24 17:29:51 +1000 | [diff] [blame] | 1283 | #endif |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1284 | |
Saurabh Sengar | 724fe69 | 2015-11-23 19:02:15 +0530 | [diff] [blame] | 1285 | static void xgene_get_port_id_dt(struct device *dev, struct xgene_enet_pdata *pdata) |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1286 | { |
| 1287 | u32 id = 0; |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1288 | |
Saurabh Sengar | 724fe69 | 2015-11-23 19:02:15 +0530 | [diff] [blame] | 1289 | of_property_read_u32(dev->of_node, "port-id", &id); |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1290 | |
Saurabh Sengar | 724fe69 | 2015-11-23 19:02:15 +0530 | [diff] [blame] | 1291 | pdata->port_id = id & BIT(0); |
| 1292 | |
| 1293 | return; |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1294 | } |
| 1295 | |
Iyappan Subramanian | 16615a4c | 2015-10-26 15:25:15 -0700 | [diff] [blame] | 1296 | static int xgene_get_tx_delay(struct xgene_enet_pdata *pdata) |
| 1297 | { |
| 1298 | struct device *dev = &pdata->pdev->dev; |
| 1299 | int delay, ret; |
| 1300 | |
| 1301 | ret = of_property_read_u32(dev->of_node, "tx-delay", &delay); |
| 1302 | if (ret) { |
| 1303 | pdata->tx_delay = 4; |
| 1304 | return 0; |
| 1305 | } |
| 1306 | |
| 1307 | if (delay < 0 || delay > 7) { |
| 1308 | dev_err(dev, "Invalid tx-delay specified\n"); |
| 1309 | return -EINVAL; |
| 1310 | } |
| 1311 | |
| 1312 | pdata->tx_delay = delay; |
| 1313 | |
| 1314 | return 0; |
| 1315 | } |
| 1316 | |
| 1317 | static int xgene_get_rx_delay(struct xgene_enet_pdata *pdata) |
| 1318 | { |
| 1319 | struct device *dev = &pdata->pdev->dev; |
| 1320 | int delay, ret; |
| 1321 | |
| 1322 | ret = of_property_read_u32(dev->of_node, "rx-delay", &delay); |
| 1323 | if (ret) { |
| 1324 | pdata->rx_delay = 2; |
| 1325 | return 0; |
| 1326 | } |
| 1327 | |
| 1328 | if (delay < 0 || delay > 7) { |
| 1329 | dev_err(dev, "Invalid rx-delay specified\n"); |
| 1330 | return -EINVAL; |
| 1331 | } |
| 1332 | |
| 1333 | pdata->rx_delay = delay; |
| 1334 | |
| 1335 | return 0; |
| 1336 | } |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1337 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1338 | static int xgene_enet_get_irqs(struct xgene_enet_pdata *pdata) |
| 1339 | { |
| 1340 | struct platform_device *pdev = pdata->pdev; |
| 1341 | struct device *dev = &pdev->dev; |
| 1342 | int i, ret, max_irqs; |
| 1343 | |
| 1344 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) |
| 1345 | max_irqs = 1; |
| 1346 | else if (pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) |
| 1347 | max_irqs = 2; |
| 1348 | else |
| 1349 | max_irqs = XGENE_MAX_ENET_IRQ; |
| 1350 | |
| 1351 | for (i = 0; i < max_irqs; i++) { |
| 1352 | ret = platform_get_irq(pdev, i); |
| 1353 | if (ret <= 0) { |
Iyappan Subramanian | 1b090a4 | 2016-05-13 16:52:59 -0700 | [diff] [blame] | 1354 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
| 1355 | max_irqs = i; |
| 1356 | pdata->rxq_cnt = max_irqs / 2; |
| 1357 | pdata->txq_cnt = max_irqs / 2; |
| 1358 | pdata->cq_cnt = max_irqs / 2; |
| 1359 | break; |
| 1360 | } |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1361 | dev_err(dev, "Unable to get ENET IRQ\n"); |
| 1362 | ret = ret ? : -ENXIO; |
| 1363 | return ret; |
| 1364 | } |
| 1365 | pdata->irqs[i] = ret; |
| 1366 | } |
| 1367 | |
| 1368 | return 0; |
| 1369 | } |
| 1370 | |
Iyappan Subramanian | 8089a96 | 2016-07-25 17:12:41 -0700 | [diff] [blame] | 1371 | static int xgene_enet_check_phy_handle(struct xgene_enet_pdata *pdata) |
| 1372 | { |
| 1373 | int ret; |
| 1374 | |
| 1375 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) |
| 1376 | return 0; |
| 1377 | |
| 1378 | if (!IS_ENABLED(CONFIG_MDIO_XGENE)) |
| 1379 | return 0; |
| 1380 | |
| 1381 | ret = xgene_enet_phy_connect(pdata->ndev); |
| 1382 | if (!ret) |
| 1383 | pdata->mdio_driver = true; |
| 1384 | |
| 1385 | return 0; |
| 1386 | } |
| 1387 | |
Iyappan Subramanian | 27ecf87 | 2016-08-12 22:05:44 -0700 | [diff] [blame] | 1388 | static void xgene_enet_gpiod_get(struct xgene_enet_pdata *pdata) |
| 1389 | { |
| 1390 | struct device *dev = &pdata->pdev->dev; |
| 1391 | |
| 1392 | if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) |
| 1393 | return; |
| 1394 | |
| 1395 | pdata->sfp_rdy = gpiod_get(dev, "rxlos", GPIOD_IN); |
| 1396 | if (IS_ERR(pdata->sfp_rdy)) |
| 1397 | pdata->sfp_rdy = gpiod_get(dev, "sfp", GPIOD_IN); |
| 1398 | } |
| 1399 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1400 | static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) |
| 1401 | { |
| 1402 | struct platform_device *pdev; |
| 1403 | struct net_device *ndev; |
| 1404 | struct device *dev; |
| 1405 | struct resource *res; |
| 1406 | void __iomem *base_addr; |
Iyappan Subramanian | 561fea6 | 2015-04-28 13:52:40 -0700 | [diff] [blame] | 1407 | u32 offset; |
Geert Uytterhoeven | 2e59871 | 2015-06-25 15:13:29 +0200 | [diff] [blame] | 1408 | int ret = 0; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1409 | |
| 1410 | pdev = pdata->pdev; |
| 1411 | dev = &pdev->dev; |
| 1412 | ndev = pdata->ndev; |
| 1413 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1414 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_ENET_CSR); |
| 1415 | if (!res) { |
| 1416 | dev_err(dev, "Resource enet_csr not defined\n"); |
| 1417 | return -ENODEV; |
| 1418 | } |
| 1419 | pdata->base_addr = devm_ioremap(dev, res->start, resource_size(res)); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1420 | if (!pdata->base_addr) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1421 | dev_err(dev, "Unable to retrieve ENET Port CSR region\n"); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1422 | return -ENOMEM; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1423 | } |
| 1424 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1425 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CSR); |
| 1426 | if (!res) { |
| 1427 | dev_err(dev, "Resource ring_csr not defined\n"); |
| 1428 | return -ENODEV; |
| 1429 | } |
| 1430 | pdata->ring_csr_addr = devm_ioremap(dev, res->start, |
| 1431 | resource_size(res)); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1432 | if (!pdata->ring_csr_addr) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1433 | dev_err(dev, "Unable to retrieve ENET Ring CSR region\n"); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1434 | return -ENOMEM; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1435 | } |
| 1436 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1437 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CMD); |
| 1438 | if (!res) { |
| 1439 | dev_err(dev, "Resource ring_cmd not defined\n"); |
| 1440 | return -ENODEV; |
| 1441 | } |
| 1442 | pdata->ring_cmd_addr = devm_ioremap(dev, res->start, |
| 1443 | resource_size(res)); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1444 | if (!pdata->ring_cmd_addr) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1445 | dev_err(dev, "Unable to retrieve ENET Ring command region\n"); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1446 | return -ENOMEM; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1447 | } |
| 1448 | |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1449 | if (dev->of_node) |
Saurabh Sengar | 724fe69 | 2015-11-23 19:02:15 +0530 | [diff] [blame] | 1450 | xgene_get_port_id_dt(dev, pdata); |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1451 | #ifdef CONFIG_ACPI |
| 1452 | else |
Saurabh Sengar | 724fe69 | 2015-11-23 19:02:15 +0530 | [diff] [blame] | 1453 | xgene_get_port_id_acpi(dev, pdata); |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1454 | #endif |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1455 | |
Jeremy Linton | 938049e | 2015-08-19 13:56:42 -0500 | [diff] [blame] | 1456 | if (!device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1457 | eth_hw_addr_random(ndev); |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1458 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1459 | memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); |
| 1460 | |
Jeremy Linton | 938049e | 2015-08-19 13:56:42 -0500 | [diff] [blame] | 1461 | pdata->phy_mode = device_get_phy_mode(dev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1462 | if (pdata->phy_mode < 0) { |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1463 | dev_err(dev, "Unable to get phy-connection-type\n"); |
| 1464 | return pdata->phy_mode; |
| 1465 | } |
| 1466 | if (pdata->phy_mode != PHY_INTERFACE_MODE_RGMII && |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 1467 | pdata->phy_mode != PHY_INTERFACE_MODE_SGMII && |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1468 | pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) { |
| 1469 | dev_err(dev, "Incorrect phy-connection-type specified\n"); |
| 1470 | return -ENODEV; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1471 | } |
| 1472 | |
Iyappan Subramanian | 16615a4c | 2015-10-26 15:25:15 -0700 | [diff] [blame] | 1473 | ret = xgene_get_tx_delay(pdata); |
| 1474 | if (ret) |
| 1475 | return ret; |
| 1476 | |
| 1477 | ret = xgene_get_rx_delay(pdata); |
| 1478 | if (ret) |
| 1479 | return ret; |
| 1480 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1481 | ret = xgene_enet_get_irqs(pdata); |
| 1482 | if (ret) |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1483 | return ret; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1484 | |
Iyappan Subramanian | 8089a96 | 2016-07-25 17:12:41 -0700 | [diff] [blame] | 1485 | ret = xgene_enet_check_phy_handle(pdata); |
| 1486 | if (ret) |
| 1487 | return ret; |
| 1488 | |
Iyappan Subramanian | 27ecf87 | 2016-08-12 22:05:44 -0700 | [diff] [blame] | 1489 | xgene_enet_gpiod_get(pdata); |
| 1490 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1491 | pdata->clk = devm_clk_get(&pdev->dev, NULL); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1492 | if (IS_ERR(pdata->clk)) { |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1493 | /* Firmware may have set up the clock already. */ |
Suman Tripathi | c2d33bd | 2015-06-23 14:47:17 +0530 | [diff] [blame] | 1494 | dev_info(dev, "clocks have been setup already\n"); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1495 | } |
| 1496 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1497 | if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) |
| 1498 | base_addr = pdata->base_addr - (pdata->port_id * MAC_OFFSET); |
| 1499 | else |
| 1500 | base_addr = pdata->base_addr; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1501 | pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET; |
Iyappan Subramanian | 76f94a9 | 2016-02-17 15:00:39 -0800 | [diff] [blame] | 1502 | pdata->cle.base = base_addr + BLOCK_ETH_CLE_CSR_OFFSET; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1503 | pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET; |
| 1504 | pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET; |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 1505 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII || |
| 1506 | pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) { |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1507 | pdata->mcx_mac_addr = pdata->base_addr + BLOCK_ETH_MAC_OFFSET; |
Iyappan Subramanian | 561fea6 | 2015-04-28 13:52:40 -0700 | [diff] [blame] | 1508 | offset = (pdata->enet_id == XGENE_ENET1) ? |
| 1509 | BLOCK_ETH_MAC_CSR_OFFSET : |
| 1510 | X2_BLOCK_ETH_MAC_CSR_OFFSET; |
| 1511 | pdata->mcx_mac_csr_addr = base_addr + offset; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1512 | } else { |
| 1513 | pdata->mcx_mac_addr = base_addr + BLOCK_AXG_MAC_OFFSET; |
| 1514 | pdata->mcx_mac_csr_addr = base_addr + BLOCK_AXG_MAC_CSR_OFFSET; |
Iyappan Subramanian | 3eb7cb9 | 2016-08-12 22:05:43 -0700 | [diff] [blame] | 1515 | pdata->pcs_addr = base_addr + BLOCK_PCS_OFFSET; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1516 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1517 | pdata->rx_buff_cnt = NUM_PKT_BUF; |
| 1518 | |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1519 | return 0; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1520 | } |
| 1521 | |
| 1522 | static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata) |
| 1523 | { |
Iyappan Subramanian | 76f94a9 | 2016-02-17 15:00:39 -0800 | [diff] [blame] | 1524 | struct xgene_enet_cle *enet_cle = &pdata->cle; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1525 | struct net_device *ndev = pdata->ndev; |
| 1526 | struct xgene_enet_desc_ring *buf_pool; |
| 1527 | u16 dst_ring_num; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1528 | int i, ret; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1529 | |
Iyappan Subramanian | c3f4465 | 2014-11-03 11:59:55 -0800 | [diff] [blame] | 1530 | ret = pdata->port_ops->reset(pdata); |
| 1531 | if (ret) |
| 1532 | return ret; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1533 | |
| 1534 | ret = xgene_enet_create_desc_rings(ndev); |
| 1535 | if (ret) { |
| 1536 | netdev_err(ndev, "Error in ring configuration\n"); |
| 1537 | return ret; |
| 1538 | } |
| 1539 | |
| 1540 | /* setup buffer pool */ |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1541 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 1542 | buf_pool = pdata->rx_ring[i]->buf_pool; |
| 1543 | xgene_enet_init_bufpool(buf_pool); |
| 1544 | ret = xgene_enet_refill_bufpool(buf_pool, pdata->rx_buff_cnt); |
Iyappan Subramanian | 15e3229 | 2016-08-12 22:05:39 -0700 | [diff] [blame] | 1545 | if (ret) |
| 1546 | goto err; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1547 | } |
| 1548 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1549 | dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring[0]); |
| 1550 | buf_pool = pdata->rx_ring[0]->buf_pool; |
Iyappan Subramanian | 76f94a9 | 2016-02-17 15:00:39 -0800 | [diff] [blame] | 1551 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
| 1552 | /* Initialize and Enable PreClassifier Tree */ |
| 1553 | enet_cle->max_nodes = 512; |
| 1554 | enet_cle->max_dbptrs = 1024; |
| 1555 | enet_cle->parsers = 3; |
| 1556 | enet_cle->active_parser = PARSER_ALL; |
| 1557 | enet_cle->ptree.start_node = 0; |
| 1558 | enet_cle->ptree.start_dbptr = 0; |
| 1559 | enet_cle->jump_bytes = 8; |
| 1560 | ret = pdata->cle_ops->cle_init(pdata); |
| 1561 | if (ret) { |
| 1562 | netdev_err(ndev, "Preclass Tree init error\n"); |
Iyappan Subramanian | 15e3229 | 2016-08-12 22:05:39 -0700 | [diff] [blame] | 1563 | goto err; |
Iyappan Subramanian | 76f94a9 | 2016-02-17 15:00:39 -0800 | [diff] [blame] | 1564 | } |
| 1565 | } else { |
| 1566 | pdata->port_ops->cle_bypass(pdata, dst_ring_num, buf_pool->id); |
| 1567 | } |
| 1568 | |
Iyappan Subramanian | 9a8c5dd | 2016-07-25 17:12:36 -0700 | [diff] [blame] | 1569 | pdata->phy_speed = SPEED_UNKNOWN; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1570 | pdata->mac_ops->init(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1571 | |
| 1572 | return ret; |
Iyappan Subramanian | 15e3229 | 2016-08-12 22:05:39 -0700 | [diff] [blame] | 1573 | |
| 1574 | err: |
| 1575 | xgene_enet_delete_desc_rings(pdata); |
| 1576 | return ret; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1577 | } |
| 1578 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1579 | static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata) |
| 1580 | { |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1581 | switch (pdata->phy_mode) { |
| 1582 | case PHY_INTERFACE_MODE_RGMII: |
| 1583 | pdata->mac_ops = &xgene_gmac_ops; |
| 1584 | pdata->port_ops = &xgene_gport_ops; |
Iyappan Subramanian | dc8385f | 2014-10-13 17:05:33 -0700 | [diff] [blame] | 1585 | pdata->rm = RM3; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1586 | pdata->rxq_cnt = 1; |
| 1587 | pdata->txq_cnt = 1; |
| 1588 | pdata->cq_cnt = 0; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1589 | break; |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 1590 | case PHY_INTERFACE_MODE_SGMII: |
| 1591 | pdata->mac_ops = &xgene_sgmac_ops; |
| 1592 | pdata->port_ops = &xgene_sgport_ops; |
| 1593 | pdata->rm = RM1; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1594 | pdata->rxq_cnt = 1; |
| 1595 | pdata->txq_cnt = 1; |
| 1596 | pdata->cq_cnt = 1; |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 1597 | break; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1598 | default: |
| 1599 | pdata->mac_ops = &xgene_xgmac_ops; |
| 1600 | pdata->port_ops = &xgene_xgport_ops; |
Iyappan Subramanian | 76f94a9 | 2016-02-17 15:00:39 -0800 | [diff] [blame] | 1601 | pdata->cle_ops = &xgene_cle3in_ops; |
Iyappan Subramanian | dc8385f | 2014-10-13 17:05:33 -0700 | [diff] [blame] | 1602 | pdata->rm = RM0; |
Iyappan Subramanian | 1b090a4 | 2016-05-13 16:52:59 -0700 | [diff] [blame] | 1603 | if (!pdata->rxq_cnt) { |
| 1604 | pdata->rxq_cnt = XGENE_NUM_RX_RING; |
| 1605 | pdata->txq_cnt = XGENE_NUM_TX_RING; |
| 1606 | pdata->cq_cnt = XGENE_NUM_TXC_RING; |
| 1607 | } |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1608 | break; |
| 1609 | } |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1610 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1611 | if (pdata->enet_id == XGENE_ENET1) { |
| 1612 | switch (pdata->port_id) { |
| 1613 | case 0: |
Iyappan Subramanian | 1b090a4 | 2016-05-13 16:52:59 -0700 | [diff] [blame] | 1614 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
| 1615 | pdata->cpu_bufnum = X2_START_CPU_BUFNUM_0; |
| 1616 | pdata->eth_bufnum = X2_START_ETH_BUFNUM_0; |
| 1617 | pdata->bp_bufnum = X2_START_BP_BUFNUM_0; |
| 1618 | pdata->ring_num = START_RING_NUM_0; |
| 1619 | } else { |
| 1620 | pdata->cpu_bufnum = START_CPU_BUFNUM_0; |
| 1621 | pdata->eth_bufnum = START_ETH_BUFNUM_0; |
| 1622 | pdata->bp_bufnum = START_BP_BUFNUM_0; |
| 1623 | pdata->ring_num = START_RING_NUM_0; |
| 1624 | } |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1625 | break; |
| 1626 | case 1: |
Iyappan Subramanian | 149e9ab | 2015-09-08 15:50:26 -0700 | [diff] [blame] | 1627 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
| 1628 | pdata->cpu_bufnum = XG_START_CPU_BUFNUM_1; |
| 1629 | pdata->eth_bufnum = XG_START_ETH_BUFNUM_1; |
| 1630 | pdata->bp_bufnum = XG_START_BP_BUFNUM_1; |
| 1631 | pdata->ring_num = XG_START_RING_NUM_1; |
| 1632 | } else { |
| 1633 | pdata->cpu_bufnum = START_CPU_BUFNUM_1; |
| 1634 | pdata->eth_bufnum = START_ETH_BUFNUM_1; |
| 1635 | pdata->bp_bufnum = START_BP_BUFNUM_1; |
| 1636 | pdata->ring_num = START_RING_NUM_1; |
| 1637 | } |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1638 | break; |
| 1639 | default: |
| 1640 | break; |
| 1641 | } |
| 1642 | pdata->ring_ops = &xgene_ring1_ops; |
| 1643 | } else { |
| 1644 | switch (pdata->port_id) { |
| 1645 | case 0: |
| 1646 | pdata->cpu_bufnum = X2_START_CPU_BUFNUM_0; |
| 1647 | pdata->eth_bufnum = X2_START_ETH_BUFNUM_0; |
| 1648 | pdata->bp_bufnum = X2_START_BP_BUFNUM_0; |
| 1649 | pdata->ring_num = X2_START_RING_NUM_0; |
| 1650 | break; |
| 1651 | case 1: |
| 1652 | pdata->cpu_bufnum = X2_START_CPU_BUFNUM_1; |
| 1653 | pdata->eth_bufnum = X2_START_ETH_BUFNUM_1; |
| 1654 | pdata->bp_bufnum = X2_START_BP_BUFNUM_1; |
| 1655 | pdata->ring_num = X2_START_RING_NUM_1; |
| 1656 | break; |
| 1657 | default: |
| 1658 | break; |
| 1659 | } |
| 1660 | pdata->rm = RM0; |
| 1661 | pdata->ring_ops = &xgene_ring2_ops; |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1662 | } |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1663 | } |
| 1664 | |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1665 | static void xgene_enet_napi_add(struct xgene_enet_pdata *pdata) |
| 1666 | { |
| 1667 | struct napi_struct *napi; |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1668 | int i; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1669 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1670 | for (i = 0; i < pdata->rxq_cnt; i++) { |
| 1671 | napi = &pdata->rx_ring[i]->napi; |
| 1672 | netif_napi_add(pdata->ndev, napi, xgene_enet_napi, |
| 1673 | NAPI_POLL_WEIGHT); |
| 1674 | } |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1675 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1676 | for (i = 0; i < pdata->cq_cnt; i++) { |
| 1677 | napi = &pdata->tx_ring[i]->cp_ring->napi; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1678 | netif_napi_add(pdata->ndev, napi, xgene_enet_napi, |
| 1679 | NAPI_POLL_WEIGHT); |
| 1680 | } |
| 1681 | } |
| 1682 | |
Arnd Bergmann | 54af028 | 2017-02-01 17:46:02 +0100 | [diff] [blame] | 1683 | #ifdef CONFIG_ACPI |
| 1684 | static const struct acpi_device_id xgene_enet_acpi_match[] = { |
| 1685 | { "APMC0D05", XGENE_ENET1}, |
| 1686 | { "APMC0D30", XGENE_ENET1}, |
| 1687 | { "APMC0D31", XGENE_ENET1}, |
| 1688 | { "APMC0D3F", XGENE_ENET1}, |
| 1689 | { "APMC0D26", XGENE_ENET2}, |
| 1690 | { "APMC0D25", XGENE_ENET2}, |
| 1691 | { } |
| 1692 | }; |
| 1693 | MODULE_DEVICE_TABLE(acpi, xgene_enet_acpi_match); |
| 1694 | #endif |
| 1695 | |
| 1696 | static const struct of_device_id xgene_enet_of_match[] = { |
| 1697 | {.compatible = "apm,xgene-enet", .data = (void *)XGENE_ENET1}, |
| 1698 | {.compatible = "apm,xgene1-sgenet", .data = (void *)XGENE_ENET1}, |
| 1699 | {.compatible = "apm,xgene1-xgenet", .data = (void *)XGENE_ENET1}, |
| 1700 | {.compatible = "apm,xgene2-sgenet", .data = (void *)XGENE_ENET2}, |
| 1701 | {.compatible = "apm,xgene2-xgenet", .data = (void *)XGENE_ENET2}, |
| 1702 | {}, |
| 1703 | }; |
| 1704 | |
| 1705 | MODULE_DEVICE_TABLE(of, xgene_enet_of_match); |
| 1706 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1707 | static int xgene_enet_probe(struct platform_device *pdev) |
| 1708 | { |
| 1709 | struct net_device *ndev; |
| 1710 | struct xgene_enet_pdata *pdata; |
| 1711 | struct device *dev = &pdev->dev; |
Iyappan Subramanian | 8089a96 | 2016-07-25 17:12:41 -0700 | [diff] [blame] | 1712 | void (*link_state)(struct work_struct *); |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1713 | const struct of_device_id *of_id; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1714 | int ret; |
| 1715 | |
Iyappan Subramanian | 107dec2 | 2016-02-17 15:00:41 -0800 | [diff] [blame] | 1716 | ndev = alloc_etherdev_mqs(sizeof(struct xgene_enet_pdata), |
| 1717 | XGENE_NUM_RX_RING, XGENE_NUM_TX_RING); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1718 | if (!ndev) |
| 1719 | return -ENOMEM; |
| 1720 | |
| 1721 | pdata = netdev_priv(ndev); |
| 1722 | |
| 1723 | pdata->pdev = pdev; |
| 1724 | pdata->ndev = ndev; |
| 1725 | SET_NETDEV_DEV(ndev, dev); |
| 1726 | platform_set_drvdata(pdev, pdata); |
| 1727 | ndev->netdev_ops = &xgene_ndev_ops; |
| 1728 | xgene_enet_set_ethtool_ops(ndev); |
| 1729 | ndev->features |= NETIF_F_IP_CSUM | |
| 1730 | NETIF_F_GSO | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 1731 | NETIF_F_GRO | |
| 1732 | NETIF_F_SG; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1733 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1734 | of_id = of_match_device(xgene_enet_of_match, &pdev->dev); |
| 1735 | if (of_id) { |
| 1736 | pdata->enet_id = (enum xgene_enet_id)of_id->data; |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1737 | } |
| 1738 | #ifdef CONFIG_ACPI |
| 1739 | else { |
| 1740 | const struct acpi_device_id *acpi_id; |
| 1741 | |
| 1742 | acpi_id = acpi_match_device(xgene_enet_acpi_match, &pdev->dev); |
| 1743 | if (acpi_id) |
| 1744 | pdata->enet_id = (enum xgene_enet_id) acpi_id->driver_data; |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1745 | } |
| 1746 | #endif |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1747 | if (!pdata->enet_id) { |
Iyappan Subramanian | cecd6e5 | 2016-08-12 22:05:40 -0700 | [diff] [blame] | 1748 | ret = -ENODEV; |
| 1749 | goto err; |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1750 | } |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1751 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1752 | ret = xgene_enet_get_resources(pdata); |
| 1753 | if (ret) |
| 1754 | goto err; |
| 1755 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1756 | xgene_enet_setup_ops(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1757 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 1758 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
Iyappan Subramanian | 671eeac | 2017-03-15 13:27:18 -0700 | [diff] [blame] | 1759 | ndev->features |= NETIF_F_TSO | NETIF_F_RXCSUM; |
Iyappan Subramanian | e397867 | 2016-09-22 15:47:33 -0700 | [diff] [blame] | 1760 | spin_lock_init(&pdata->mss_lock); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 1761 | } |
| 1762 | ndev->hw_features = ndev->features; |
| 1763 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1764 | ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1765 | if (ret) { |
| 1766 | netdev_err(ndev, "No usable DMA configuration\n"); |
| 1767 | goto err; |
| 1768 | } |
| 1769 | |
| 1770 | ret = xgene_enet_init_hw(pdata); |
| 1771 | if (ret) |
Iyappan Subramanian | cecd6e5 | 2016-08-12 22:05:40 -0700 | [diff] [blame] | 1772 | goto err; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1773 | |
Iyappan Subramanian | 8089a96 | 2016-07-25 17:12:41 -0700 | [diff] [blame] | 1774 | link_state = pdata->mac_ops->link_state; |
| 1775 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
| 1776 | INIT_DELAYED_WORK(&pdata->link_work, link_state); |
| 1777 | } else if (!pdata->mdio_driver) { |
| 1778 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) |
| 1779 | ret = xgene_enet_mdio_config(pdata); |
| 1780 | else |
| 1781 | INIT_DELAYED_WORK(&pdata->link_work, link_state); |
Iyappan Subramanian | cecd6e5 | 2016-08-12 22:05:40 -0700 | [diff] [blame] | 1782 | |
| 1783 | if (ret) |
| 1784 | goto err1; |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame] | 1785 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1786 | |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame] | 1787 | xgene_enet_napi_add(pdata); |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1788 | ret = register_netdev(ndev); |
| 1789 | if (ret) { |
| 1790 | netdev_err(ndev, "Failed to register netdev\n"); |
Iyappan Subramanian | cecd6e5 | 2016-08-12 22:05:40 -0700 | [diff] [blame] | 1791 | goto err2; |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1792 | } |
| 1793 | |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame] | 1794 | return 0; |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1795 | |
Iyappan Subramanian | cecd6e5 | 2016-08-12 22:05:40 -0700 | [diff] [blame] | 1796 | err2: |
| 1797 | /* |
| 1798 | * If necessary, free_netdev() will call netif_napi_del() and undo |
| 1799 | * the effects of xgene_enet_napi_add()'s calls to netif_napi_add(). |
| 1800 | */ |
| 1801 | |
| 1802 | if (pdata->mdio_driver) |
| 1803 | xgene_enet_phy_disconnect(pdata); |
| 1804 | else if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) |
| 1805 | xgene_enet_mdio_remove(pdata); |
| 1806 | err1: |
| 1807 | xgene_enet_delete_desc_rings(pdata); |
Matthias Brugger | 20decb7 | 2016-05-03 16:05:07 +0200 | [diff] [blame] | 1808 | err: |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1809 | free_netdev(ndev); |
| 1810 | return ret; |
| 1811 | } |
| 1812 | |
| 1813 | static int xgene_enet_remove(struct platform_device *pdev) |
| 1814 | { |
| 1815 | struct xgene_enet_pdata *pdata; |
| 1816 | struct net_device *ndev; |
| 1817 | |
| 1818 | pdata = platform_get_drvdata(pdev); |
| 1819 | ndev = pdata->ndev; |
| 1820 | |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1821 | rtnl_lock(); |
| 1822 | if (netif_running(ndev)) |
| 1823 | dev_close(ndev); |
| 1824 | rtnl_unlock(); |
| 1825 | |
Iyappan Subramanian | 8089a96 | 2016-07-25 17:12:41 -0700 | [diff] [blame] | 1826 | if (pdata->mdio_driver) |
| 1827 | xgene_enet_phy_disconnect(pdata); |
| 1828 | else if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) |
Iyappan Subramanian | ccc02dd | 2015-08-25 15:03:03 -0700 | [diff] [blame] | 1829 | xgene_enet_mdio_remove(pdata); |
Iyappan Subramanian | 8089a96 | 2016-07-25 17:12:41 -0700 | [diff] [blame] | 1830 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1831 | unregister_netdev(ndev); |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1832 | pdata->port_ops->shutdown(pdata); |
Iyappan Subramanian | cb11c06 | 2016-07-25 17:12:37 -0700 | [diff] [blame] | 1833 | xgene_enet_delete_desc_rings(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1834 | free_netdev(ndev); |
| 1835 | |
| 1836 | return 0; |
| 1837 | } |
| 1838 | |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1839 | static void xgene_enet_shutdown(struct platform_device *pdev) |
| 1840 | { |
| 1841 | struct xgene_enet_pdata *pdata; |
| 1842 | |
| 1843 | pdata = platform_get_drvdata(pdev); |
| 1844 | if (!pdata) |
| 1845 | return; |
| 1846 | |
| 1847 | if (!pdata->ndev) |
| 1848 | return; |
| 1849 | |
| 1850 | xgene_enet_remove(pdev); |
| 1851 | } |
| 1852 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1853 | static struct platform_driver xgene_enet_driver = { |
| 1854 | .driver = { |
| 1855 | .name = "xgene-enet", |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1856 | .of_match_table = of_match_ptr(xgene_enet_of_match), |
| 1857 | .acpi_match_table = ACPI_PTR(xgene_enet_acpi_match), |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1858 | }, |
| 1859 | .probe = xgene_enet_probe, |
| 1860 | .remove = xgene_enet_remove, |
Iyappan Subramanian | cb0366b | 2016-07-25 17:12:38 -0700 | [diff] [blame] | 1861 | .shutdown = xgene_enet_shutdown, |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1862 | }; |
| 1863 | |
| 1864 | module_platform_driver(xgene_enet_driver); |
| 1865 | |
| 1866 | MODULE_DESCRIPTION("APM X-Gene SoC Ethernet driver"); |
| 1867 | MODULE_VERSION(XGENE_DRV_VERSION); |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1868 | MODULE_AUTHOR("Iyappan Subramanian <isubramanian@apm.com>"); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1869 | MODULE_AUTHOR("Keyur Chudgar <kchudgar@apm.com>"); |
| 1870 | MODULE_LICENSE("GPL"); |