2 * Copyright (C) 1999 - 2010 Intel Corporation.
3 * Copyright (C) 2010 - 2012 LAPIS SEMICONDUCTOR CO., LTD.
5 * This code was derived from the Intel e1000e Linux driver.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include "pch_gbe_phy.h"
22 #include <linux/module.h>
23 #include <linux/net_tstamp.h>
24 #include <linux/ptp_classify.h>
25 #include <linux/gpio.h>
27 #define DRV_VERSION "1.01"
28 const char pch_driver_version[] = DRV_VERSION;
30 #define PCH_GBE_MAR_ENTRIES 16
31 #define PCH_GBE_SHORT_PKT 64
32 #define DSC_INIT16 0xC000
33 #define PCH_GBE_DMA_ALIGN 0
34 #define PCH_GBE_DMA_PADDING 2
35 #define PCH_GBE_WATCHDOG_PERIOD (5 * HZ) /* watchdog time */
36 #define PCH_GBE_PCI_BAR 1
37 #define PCH_GBE_RESERVE_MEMORY 0x200000 /* 2MB */
39 #define PCI_DEVICE_ID_INTEL_IOH1_GBE 0x8802
41 #define PCI_DEVICE_ID_ROHM_ML7223_GBE 0x8013
42 #define PCI_DEVICE_ID_ROHM_ML7831_GBE 0x8802
44 #define PCH_GBE_TX_WEIGHT 64
45 #define PCH_GBE_RX_WEIGHT 64
46 #define PCH_GBE_RX_BUFFER_WRITE 16
48 /* Initialize the wake-on-LAN settings */
49 #define PCH_GBE_WL_INIT_SETTING (PCH_GBE_WLC_MP)
51 #define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
52 PCH_GBE_CHIP_TYPE_INTERNAL | \
53 PCH_GBE_RGMII_MODE_RGMII \
56 /* Ethertype field values */
57 #define PCH_GBE_MAX_RX_BUFFER_SIZE 0x2880
58 #define PCH_GBE_MAX_JUMBO_FRAME_SIZE 10318
59 #define PCH_GBE_FRAME_SIZE_2048 2048
60 #define PCH_GBE_FRAME_SIZE_4096 4096
61 #define PCH_GBE_FRAME_SIZE_8192 8192
63 #define PCH_GBE_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
64 #define PCH_GBE_RX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_rx_desc)
65 #define PCH_GBE_TX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_tx_desc)
66 #define PCH_GBE_DESC_UNUSED(R) \
67 ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
68 (R)->next_to_clean - (R)->next_to_use - 1)
70 /* Pause packet value */
71 #define PCH_GBE_PAUSE_PKT1_VALUE 0x00C28001
72 #define PCH_GBE_PAUSE_PKT2_VALUE 0x00000100
73 #define PCH_GBE_PAUSE_PKT4_VALUE 0x01000888
74 #define PCH_GBE_PAUSE_PKT5_VALUE 0x0000FFFF
77 /* This defines the bits that are set in the Interrupt Mask
78 * Set/Read Register. Each bit is documented below:
79 * o RXT0 = Receiver Timer Interrupt (ring 0)
80 * o TXDW = Transmit Descriptor Written Back
81 * o RXDMT0 = Receive Descriptor Minimum Threshold hit (ring 0)
82 * o RXSEQ = Receive Sequence Error
83 * o LSC = Link Status Change
85 #define PCH_GBE_INT_ENABLE_MASK ( \
86 PCH_GBE_INT_RX_DMA_CMPLT | \
87 PCH_GBE_INT_RX_DSC_EMP | \
88 PCH_GBE_INT_RX_FIFO_ERR | \
89 PCH_GBE_INT_WOL_DET | \
90 PCH_GBE_INT_TX_CMPLT \
93 #define PCH_GBE_INT_DISABLE_ALL 0
95 /* Macros for ieee1588 */
96 /* 0x40 Time Synchronization Channel Control Register Bits */
97 #define MASTER_MODE (1<<0)
98 #define SLAVE_MODE (0)
99 #define V2_MODE (1<<31)
100 #define CAP_MODE0 (0)
101 #define CAP_MODE2 (1<<17)
103 /* 0x44 Time Synchronization Channel Event Register Bits */
104 #define TX_SNAPSHOT_LOCKED (1<<0)
105 #define RX_SNAPSHOT_LOCKED (1<<1)
107 #define PTP_L4_MULTICAST_SA "01:00:5e:00:01:81"
108 #define PTP_L2_MULTICAST_SA "01:1b:19:00:00:00"
110 #define MINNOW_PHY_RESET_GPIO 13
112 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
113 static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
115 static void pch_gbe_set_multi(struct net_device *netdev);
117 static int pch_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
119 u8 *data = skb->data;
124 if (ptp_classify_raw(skb) == PTP_CLASS_NONE)
127 offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
129 if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid))
132 hi = (u16 *)(data + offset + OFF_PTP_SOURCE_UUID);
133 id = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
135 memcpy(&lo, &hi[1], sizeof(lo));
137 return (uid_hi == *hi &&
143 pch_rx_timestamp(struct pch_gbe_adapter *adapter, struct sk_buff *skb)
145 struct skb_shared_hwtstamps *shhwtstamps;
146 struct pci_dev *pdev;
151 if (!adapter->hwts_rx_en)
154 /* Get ieee1588's dev information */
155 pdev = adapter->ptp_pdev;
157 val = pch_ch_event_read(pdev);
159 if (!(val & RX_SNAPSHOT_LOCKED))
162 lo = pch_src_uuid_lo_read(pdev);
163 hi = pch_src_uuid_hi_read(pdev);
166 seq = (hi >> 16) & 0xffff;
168 if (!pch_ptp_match(skb, htons(uid), htonl(lo), htons(seq)))
171 ns = pch_rx_snap_read(pdev);
173 shhwtstamps = skb_hwtstamps(skb);
174 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
175 shhwtstamps->hwtstamp = ns_to_ktime(ns);
177 pch_ch_event_write(pdev, RX_SNAPSHOT_LOCKED);
181 pch_tx_timestamp(struct pch_gbe_adapter *adapter, struct sk_buff *skb)
183 struct skb_shared_hwtstamps shhwtstamps;
184 struct pci_dev *pdev;
185 struct skb_shared_info *shtx;
189 shtx = skb_shinfo(skb);
190 if (likely(!(shtx->tx_flags & SKBTX_HW_TSTAMP && adapter->hwts_tx_en)))
193 shtx->tx_flags |= SKBTX_IN_PROGRESS;
195 /* Get ieee1588's dev information */
196 pdev = adapter->ptp_pdev;
199 * This really stinks, but we have to poll for the Tx time stamp.
201 for (cnt = 0; cnt < 100; cnt++) {
202 val = pch_ch_event_read(pdev);
203 if (val & TX_SNAPSHOT_LOCKED)
207 if (!(val & TX_SNAPSHOT_LOCKED)) {
208 shtx->tx_flags &= ~SKBTX_IN_PROGRESS;
212 ns = pch_tx_snap_read(pdev);
214 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
215 shhwtstamps.hwtstamp = ns_to_ktime(ns);
216 skb_tstamp_tx(skb, &shhwtstamps);
218 pch_ch_event_write(pdev, TX_SNAPSHOT_LOCKED);
221 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
223 struct hwtstamp_config cfg;
224 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
225 struct pci_dev *pdev;
228 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
231 if (cfg.flags) /* reserved for future extensions */
234 /* Get ieee1588's dev information */
235 pdev = adapter->ptp_pdev;
237 if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
240 switch (cfg.rx_filter) {
241 case HWTSTAMP_FILTER_NONE:
242 adapter->hwts_rx_en = 0;
244 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
245 adapter->hwts_rx_en = 0;
246 pch_ch_control_write(pdev, SLAVE_MODE | CAP_MODE0);
248 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
249 adapter->hwts_rx_en = 1;
250 pch_ch_control_write(pdev, MASTER_MODE | CAP_MODE0);
252 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
253 adapter->hwts_rx_en = 1;
254 pch_ch_control_write(pdev, V2_MODE | CAP_MODE2);
255 strcpy(station, PTP_L4_MULTICAST_SA);
256 pch_set_station_address(station, pdev);
258 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
259 adapter->hwts_rx_en = 1;
260 pch_ch_control_write(pdev, V2_MODE | CAP_MODE2);
261 strcpy(station, PTP_L2_MULTICAST_SA);
262 pch_set_station_address(station, pdev);
268 adapter->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
270 /* Clear out any old time stamps. */
271 pch_ch_event_write(pdev, TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED);
273 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
276 static inline void pch_gbe_mac_load_mac_addr(struct pch_gbe_hw *hw)
278 iowrite32(0x01, &hw->reg->MAC_ADDR_LOAD);
282 * pch_gbe_mac_read_mac_addr - Read MAC address
283 * @hw: Pointer to the HW structure
287 static s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
289 struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
292 adr1a = ioread32(&hw->reg->mac_adr[0].high);
293 adr1b = ioread32(&hw->reg->mac_adr[0].low);
295 hw->mac.addr[0] = (u8)(adr1a & 0xFF);
296 hw->mac.addr[1] = (u8)((adr1a >> 8) & 0xFF);
297 hw->mac.addr[2] = (u8)((adr1a >> 16) & 0xFF);
298 hw->mac.addr[3] = (u8)((adr1a >> 24) & 0xFF);
299 hw->mac.addr[4] = (u8)(adr1b & 0xFF);
300 hw->mac.addr[5] = (u8)((adr1b >> 8) & 0xFF);
302 netdev_dbg(adapter->netdev, "hw->mac.addr : %pM\n", hw->mac.addr);
307 * pch_gbe_wait_clr_bit - Wait to clear a bit
308 * @reg: Pointer of register
311 static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
317 while ((ioread32(reg) & bit) && --tmp)
320 pr_err("Error: busy bit is not cleared\n");
324 * pch_gbe_mac_mar_set - Set MAC address register
325 * @hw: Pointer to the HW structure
326 * @addr: Pointer to the MAC address
327 * @index: MAC address array register
329 static void pch_gbe_mac_mar_set(struct pch_gbe_hw *hw, u8 * addr, u32 index)
331 struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
332 u32 mar_low, mar_high, adrmask;
334 netdev_dbg(adapter->netdev, "index : 0x%x\n", index);
337 * HW expects these in little endian so we reverse the byte order
338 * from network order (big endian) to little endian
340 mar_high = ((u32) addr[0] | ((u32) addr[1] << 8) |
341 ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
342 mar_low = ((u32) addr[4] | ((u32) addr[5] << 8));
343 /* Stop the MAC Address of index. */
344 adrmask = ioread32(&hw->reg->ADDR_MASK);
345 iowrite32((adrmask | (0x0001 << index)), &hw->reg->ADDR_MASK);
347 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
348 /* Set the MAC address to the MAC address 1A/1B register */
349 iowrite32(mar_high, &hw->reg->mac_adr[index].high);
350 iowrite32(mar_low, &hw->reg->mac_adr[index].low);
351 /* Start the MAC address of index */
352 iowrite32((adrmask & ~(0x0001 << index)), &hw->reg->ADDR_MASK);
354 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
358 * pch_gbe_mac_reset_hw - Reset hardware
359 * @hw: Pointer to the HW structure
361 static void pch_gbe_mac_reset_hw(struct pch_gbe_hw *hw)
363 /* Read the MAC address. and store to the private data */
364 pch_gbe_mac_read_mac_addr(hw);
365 iowrite32(PCH_GBE_ALL_RST, &hw->reg->RESET);
366 iowrite32(PCH_GBE_MODE_GMII_ETHER, &hw->reg->MODE);
367 pch_gbe_wait_clr_bit(&hw->reg->RESET, PCH_GBE_ALL_RST);
368 /* Setup the receive addresses */
369 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
373 static void pch_gbe_disable_mac_rx(struct pch_gbe_hw *hw)
376 /* Disables Receive MAC */
377 rctl = ioread32(&hw->reg->MAC_RX_EN);
378 iowrite32((rctl & ~PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
381 static void pch_gbe_enable_mac_rx(struct pch_gbe_hw *hw)
384 /* Enables Receive MAC */
385 rctl = ioread32(&hw->reg->MAC_RX_EN);
386 iowrite32((rctl | PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
390 * pch_gbe_mac_init_rx_addrs - Initialize receive address's
391 * @hw: Pointer to the HW structure
392 * @mar_count: Receive address registers
394 static void pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw *hw, u16 mar_count)
398 /* Setup the receive address */
399 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
401 /* Zero out the other receive addresses */
402 for (i = 1; i < mar_count; i++) {
403 iowrite32(0, &hw->reg->mac_adr[i].high);
404 iowrite32(0, &hw->reg->mac_adr[i].low);
406 iowrite32(0xFFFE, &hw->reg->ADDR_MASK);
408 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
412 * pch_gbe_mac_force_mac_fc - Force the MAC's flow control settings
413 * @hw: Pointer to the HW structure
416 * Negative value: Failed.
418 s32 pch_gbe_mac_force_mac_fc(struct pch_gbe_hw *hw)
420 struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
421 struct pch_gbe_mac_info *mac = &hw->mac;
424 netdev_dbg(adapter->netdev, "mac->fc = %u\n", mac->fc);
426 rx_fctrl = ioread32(&hw->reg->RX_FCTRL);
429 case PCH_GBE_FC_NONE:
430 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
431 mac->tx_fc_enable = false;
433 case PCH_GBE_FC_RX_PAUSE:
434 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
435 mac->tx_fc_enable = false;
437 case PCH_GBE_FC_TX_PAUSE:
438 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
439 mac->tx_fc_enable = true;
441 case PCH_GBE_FC_FULL:
442 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
443 mac->tx_fc_enable = true;
446 netdev_err(adapter->netdev,
447 "Flow control param set incorrectly\n");
450 if (mac->link_duplex == DUPLEX_HALF)
451 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
452 iowrite32(rx_fctrl, &hw->reg->RX_FCTRL);
453 netdev_dbg(adapter->netdev,
454 "RX_FCTRL reg : 0x%08x mac->tx_fc_enable : %d\n",
455 ioread32(&hw->reg->RX_FCTRL), mac->tx_fc_enable);
460 * pch_gbe_mac_set_wol_event - Set wake-on-lan event
461 * @hw: Pointer to the HW structure
462 * @wu_evt: Wake up event
464 static void pch_gbe_mac_set_wol_event(struct pch_gbe_hw *hw, u32 wu_evt)
466 struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
469 netdev_dbg(adapter->netdev, "wu_evt : 0x%08x ADDR_MASK reg : 0x%08x\n",
470 wu_evt, ioread32(&hw->reg->ADDR_MASK));
473 /* Set Wake-On-Lan address mask */
474 addr_mask = ioread32(&hw->reg->ADDR_MASK);
475 iowrite32(addr_mask, &hw->reg->WOL_ADDR_MASK);
477 pch_gbe_wait_clr_bit(&hw->reg->WOL_ADDR_MASK, PCH_GBE_WLA_BUSY);
478 iowrite32(0, &hw->reg->WOL_ST);
479 iowrite32((wu_evt | PCH_GBE_WLC_WOL_MODE), &hw->reg->WOL_CTRL);
480 iowrite32(0x02, &hw->reg->TCPIP_ACC);
481 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
483 iowrite32(0, &hw->reg->WOL_CTRL);
484 iowrite32(0, &hw->reg->WOL_ST);
490 * pch_gbe_mac_ctrl_miim - Control MIIM interface
491 * @hw: Pointer to the HW structure
492 * @addr: Address of PHY
493 * @dir: Operetion. (Write or Read)
494 * @reg: Access register of PHY
497 * Returns: Read date.
499 u16 pch_gbe_mac_ctrl_miim(struct pch_gbe_hw *hw, u32 addr, u32 dir, u32 reg,
502 struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
507 spin_lock_irqsave(&hw->miim_lock, flags);
509 for (i = 100; i; --i) {
510 if ((ioread32(&hw->reg->MIIM) & PCH_GBE_MIIM_OPER_READY))
515 netdev_err(adapter->netdev, "pch-gbe.miim won't go Ready\n");
516 spin_unlock_irqrestore(&hw->miim_lock, flags);
517 return 0; /* No way to indicate timeout error */
519 iowrite32(((reg << PCH_GBE_MIIM_REG_ADDR_SHIFT) |
520 (addr << PCH_GBE_MIIM_PHY_ADDR_SHIFT) |
521 dir | data), &hw->reg->MIIM);
522 for (i = 0; i < 100; i++) {
524 data_out = ioread32(&hw->reg->MIIM);
525 if ((data_out & PCH_GBE_MIIM_OPER_READY))
528 spin_unlock_irqrestore(&hw->miim_lock, flags);
530 netdev_dbg(adapter->netdev, "PHY %s: reg=%d, data=0x%04X\n",
531 dir == PCH_GBE_MIIM_OPER_READ ? "READ" : "WRITE", reg,
532 dir == PCH_GBE_MIIM_OPER_READ ? data_out : data);
533 return (u16) data_out;
537 * pch_gbe_mac_set_pause_packet - Set pause packet
538 * @hw: Pointer to the HW structure
540 static void pch_gbe_mac_set_pause_packet(struct pch_gbe_hw *hw)
542 struct pch_gbe_adapter *adapter = pch_gbe_hw_to_adapter(hw);
543 unsigned long tmp2, tmp3;
545 /* Set Pause packet */
546 tmp2 = hw->mac.addr[1];
547 tmp2 = (tmp2 << 8) | hw->mac.addr[0];
548 tmp2 = PCH_GBE_PAUSE_PKT2_VALUE | (tmp2 << 16);
550 tmp3 = hw->mac.addr[5];
551 tmp3 = (tmp3 << 8) | hw->mac.addr[4];
552 tmp3 = (tmp3 << 8) | hw->mac.addr[3];
553 tmp3 = (tmp3 << 8) | hw->mac.addr[2];
555 iowrite32(PCH_GBE_PAUSE_PKT1_VALUE, &hw->reg->PAUSE_PKT1);
556 iowrite32(tmp2, &hw->reg->PAUSE_PKT2);
557 iowrite32(tmp3, &hw->reg->PAUSE_PKT3);
558 iowrite32(PCH_GBE_PAUSE_PKT4_VALUE, &hw->reg->PAUSE_PKT4);
559 iowrite32(PCH_GBE_PAUSE_PKT5_VALUE, &hw->reg->PAUSE_PKT5);
561 /* Transmit Pause Packet */
562 iowrite32(PCH_GBE_PS_PKT_RQ, &hw->reg->PAUSE_REQ);
564 netdev_dbg(adapter->netdev,
565 "PAUSE_PKT1-5 reg : 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
566 ioread32(&hw->reg->PAUSE_PKT1),
567 ioread32(&hw->reg->PAUSE_PKT2),
568 ioread32(&hw->reg->PAUSE_PKT3),
569 ioread32(&hw->reg->PAUSE_PKT4),
570 ioread32(&hw->reg->PAUSE_PKT5));
577 * pch_gbe_alloc_queues - Allocate memory for all rings
578 * @adapter: Board private structure to initialize
581 * Negative value: Failed
583 static int pch_gbe_alloc_queues(struct pch_gbe_adapter *adapter)
585 adapter->tx_ring = devm_kzalloc(&adapter->pdev->dev,
586 sizeof(*adapter->tx_ring), GFP_KERNEL);
587 if (!adapter->tx_ring)
590 adapter->rx_ring = devm_kzalloc(&adapter->pdev->dev,
591 sizeof(*adapter->rx_ring), GFP_KERNEL);
592 if (!adapter->rx_ring)
598 * pch_gbe_init_stats - Initialize status
599 * @adapter: Board private structure to initialize
601 static void pch_gbe_init_stats(struct pch_gbe_adapter *adapter)
603 memset(&adapter->stats, 0, sizeof(adapter->stats));
608 * pch_gbe_init_phy - Initialize PHY
609 * @adapter: Board private structure to initialize
612 * Negative value: Failed
614 static int pch_gbe_init_phy(struct pch_gbe_adapter *adapter)
616 struct net_device *netdev = adapter->netdev;
620 /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
621 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
622 adapter->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
623 bmcr = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMCR);
624 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
625 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
626 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
629 adapter->hw.phy.addr = adapter->mii.phy_id;
630 netdev_dbg(netdev, "phy_addr = %d\n", adapter->mii.phy_id);
631 if (addr == PCH_GBE_PHY_REGS_LEN)
633 /* Selected the phy and isolate the rest */
634 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
635 if (addr != adapter->mii.phy_id) {
636 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
639 bmcr = pch_gbe_mdio_read(netdev, addr, MII_BMCR);
640 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
641 bmcr & ~BMCR_ISOLATE);
646 adapter->mii.phy_id_mask = 0x1F;
647 adapter->mii.reg_num_mask = 0x1F;
648 adapter->mii.dev = adapter->netdev;
649 adapter->mii.mdio_read = pch_gbe_mdio_read;
650 adapter->mii.mdio_write = pch_gbe_mdio_write;
651 adapter->mii.supports_gmii = mii_check_gmii_support(&adapter->mii);
656 * pch_gbe_mdio_read - The read function for mii
657 * @netdev: Network interface device structure
659 * @reg: Access location
662 * Negative value: Failed
664 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg)
666 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
667 struct pch_gbe_hw *hw = &adapter->hw;
669 return pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_READ, reg,
674 * pch_gbe_mdio_write - The write function for mii
675 * @netdev: Network interface device structure
676 * @addr: Phy ID (not used)
677 * @reg: Access location
680 static void pch_gbe_mdio_write(struct net_device *netdev,
681 int addr, int reg, int data)
683 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
684 struct pch_gbe_hw *hw = &adapter->hw;
686 pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_WRITE, reg, data);
690 * pch_gbe_reset_task - Reset processing at the time of transmission timeout
691 * @work: Pointer of board private structure
693 static void pch_gbe_reset_task(struct work_struct *work)
695 struct pch_gbe_adapter *adapter;
696 adapter = container_of(work, struct pch_gbe_adapter, reset_task);
699 pch_gbe_reinit_locked(adapter);
704 * pch_gbe_reinit_locked- Re-initialization
705 * @adapter: Board private structure
707 void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
709 pch_gbe_down(adapter);
714 * pch_gbe_reset - Reset GbE
715 * @adapter: Board private structure
717 void pch_gbe_reset(struct pch_gbe_adapter *adapter)
719 struct net_device *netdev = adapter->netdev;
720 struct pch_gbe_hw *hw = &adapter->hw;
723 pch_gbe_mac_reset_hw(hw);
724 /* reprogram multicast address register after reset */
725 pch_gbe_set_multi(netdev);
726 /* Setup the receive address. */
727 pch_gbe_mac_init_rx_addrs(hw, PCH_GBE_MAR_ENTRIES);
729 ret_val = pch_gbe_phy_get_id(hw);
731 netdev_err(adapter->netdev, "pch_gbe_phy_get_id error\n");
734 pch_gbe_phy_init_setting(hw);
735 /* Setup Mac interface option RGMII */
736 pch_gbe_phy_set_rgmii(hw);
740 * pch_gbe_free_irq - Free an interrupt
741 * @adapter: Board private structure
743 static void pch_gbe_free_irq(struct pch_gbe_adapter *adapter)
745 struct net_device *netdev = adapter->netdev;
747 free_irq(adapter->irq, netdev);
748 pci_free_irq_vectors(adapter->pdev);
752 * pch_gbe_irq_disable - Mask off interrupt generation on the NIC
753 * @adapter: Board private structure
755 static void pch_gbe_irq_disable(struct pch_gbe_adapter *adapter)
757 struct pch_gbe_hw *hw = &adapter->hw;
759 atomic_inc(&adapter->irq_sem);
760 iowrite32(0, &hw->reg->INT_EN);
761 ioread32(&hw->reg->INT_ST);
762 synchronize_irq(adapter->irq);
764 netdev_dbg(adapter->netdev, "INT_EN reg : 0x%08x\n",
765 ioread32(&hw->reg->INT_EN));
769 * pch_gbe_irq_enable - Enable default interrupt generation settings
770 * @adapter: Board private structure
772 static void pch_gbe_irq_enable(struct pch_gbe_adapter *adapter)
774 struct pch_gbe_hw *hw = &adapter->hw;
776 if (likely(atomic_dec_and_test(&adapter->irq_sem)))
777 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
778 ioread32(&hw->reg->INT_ST);
779 netdev_dbg(adapter->netdev, "INT_EN reg : 0x%08x\n",
780 ioread32(&hw->reg->INT_EN));
786 * pch_gbe_setup_tctl - configure the Transmit control registers
787 * @adapter: Board private structure
789 static void pch_gbe_setup_tctl(struct pch_gbe_adapter *adapter)
791 struct pch_gbe_hw *hw = &adapter->hw;
794 tx_mode = PCH_GBE_TM_LONG_PKT |
795 PCH_GBE_TM_ST_AND_FD |
796 PCH_GBE_TM_SHORT_PKT |
797 PCH_GBE_TM_TH_TX_STRT_8 |
798 PCH_GBE_TM_TH_ALM_EMP_4 | PCH_GBE_TM_TH_ALM_FULL_8;
800 iowrite32(tx_mode, &hw->reg->TX_MODE);
802 tcpip = ioread32(&hw->reg->TCPIP_ACC);
803 tcpip |= PCH_GBE_TX_TCPIPACC_EN;
804 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
809 * pch_gbe_configure_tx - Configure Transmit Unit after Reset
810 * @adapter: Board private structure
812 static void pch_gbe_configure_tx(struct pch_gbe_adapter *adapter)
814 struct pch_gbe_hw *hw = &adapter->hw;
815 u32 tdba, tdlen, dctrl;
817 netdev_dbg(adapter->netdev, "dma addr = 0x%08llx size = 0x%08x\n",
818 (unsigned long long)adapter->tx_ring->dma,
819 adapter->tx_ring->size);
821 /* Setup the HW Tx Head and Tail descriptor pointers */
822 tdba = adapter->tx_ring->dma;
823 tdlen = adapter->tx_ring->size - 0x10;
824 iowrite32(tdba, &hw->reg->TX_DSC_BASE);
825 iowrite32(tdlen, &hw->reg->TX_DSC_SIZE);
826 iowrite32(tdba, &hw->reg->TX_DSC_SW_P);
828 /* Enables Transmission DMA */
829 dctrl = ioread32(&hw->reg->DMA_CTRL);
830 dctrl |= PCH_GBE_TX_DMA_EN;
831 iowrite32(dctrl, &hw->reg->DMA_CTRL);
835 * pch_gbe_setup_rctl - Configure the receive control registers
836 * @adapter: Board private structure
838 static void pch_gbe_setup_rctl(struct pch_gbe_adapter *adapter)
840 struct pch_gbe_hw *hw = &adapter->hw;
843 rx_mode = PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN |
844 PCH_GBE_RH_ALM_EMP_4 | PCH_GBE_RH_ALM_FULL_4 | PCH_GBE_RH_RD_TRG_8;
846 iowrite32(rx_mode, &hw->reg->RX_MODE);
848 tcpip = ioread32(&hw->reg->TCPIP_ACC);
850 tcpip |= PCH_GBE_RX_TCPIPACC_OFF;
851 tcpip &= ~PCH_GBE_RX_TCPIPACC_EN;
852 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
857 * pch_gbe_configure_rx - Configure Receive Unit after Reset
858 * @adapter: Board private structure
860 static void pch_gbe_configure_rx(struct pch_gbe_adapter *adapter)
862 struct pch_gbe_hw *hw = &adapter->hw;
863 u32 rdba, rdlen, rxdma;
865 netdev_dbg(adapter->netdev, "dma adr = 0x%08llx size = 0x%08x\n",
866 (unsigned long long)adapter->rx_ring->dma,
867 adapter->rx_ring->size);
869 pch_gbe_mac_force_mac_fc(hw);
871 pch_gbe_disable_mac_rx(hw);
873 /* Disables Receive DMA */
874 rxdma = ioread32(&hw->reg->DMA_CTRL);
875 rxdma &= ~PCH_GBE_RX_DMA_EN;
876 iowrite32(rxdma, &hw->reg->DMA_CTRL);
878 netdev_dbg(adapter->netdev,
879 "MAC_RX_EN reg = 0x%08x DMA_CTRL reg = 0x%08x\n",
880 ioread32(&hw->reg->MAC_RX_EN),
881 ioread32(&hw->reg->DMA_CTRL));
883 /* Setup the HW Rx Head and Tail Descriptor Pointers and
884 * the Base and Length of the Rx Descriptor Ring */
885 rdba = adapter->rx_ring->dma;
886 rdlen = adapter->rx_ring->size - 0x10;
887 iowrite32(rdba, &hw->reg->RX_DSC_BASE);
888 iowrite32(rdlen, &hw->reg->RX_DSC_SIZE);
889 iowrite32((rdba + rdlen), &hw->reg->RX_DSC_SW_P);
893 * pch_gbe_unmap_and_free_tx_resource - Unmap and free tx socket buffer
894 * @adapter: Board private structure
895 * @buffer_info: Buffer information structure
897 static void pch_gbe_unmap_and_free_tx_resource(
898 struct pch_gbe_adapter *adapter, struct pch_gbe_buffer *buffer_info)
900 if (buffer_info->mapped) {
901 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
902 buffer_info->length, DMA_TO_DEVICE);
903 buffer_info->mapped = false;
905 if (buffer_info->skb) {
906 dev_kfree_skb_any(buffer_info->skb);
907 buffer_info->skb = NULL;
912 * pch_gbe_unmap_and_free_rx_resource - Unmap and free rx socket buffer
913 * @adapter: Board private structure
914 * @buffer_info: Buffer information structure
916 static void pch_gbe_unmap_and_free_rx_resource(
917 struct pch_gbe_adapter *adapter,
918 struct pch_gbe_buffer *buffer_info)
920 if (buffer_info->mapped) {
921 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
922 buffer_info->length, DMA_FROM_DEVICE);
923 buffer_info->mapped = false;
925 if (buffer_info->skb) {
926 dev_kfree_skb_any(buffer_info->skb);
927 buffer_info->skb = NULL;
932 * pch_gbe_clean_tx_ring - Free Tx Buffers
933 * @adapter: Board private structure
934 * @tx_ring: Ring to be cleaned
936 static void pch_gbe_clean_tx_ring(struct pch_gbe_adapter *adapter,
937 struct pch_gbe_tx_ring *tx_ring)
939 struct pch_gbe_hw *hw = &adapter->hw;
940 struct pch_gbe_buffer *buffer_info;
944 /* Free all the Tx ring sk_buffs */
945 for (i = 0; i < tx_ring->count; i++) {
946 buffer_info = &tx_ring->buffer_info[i];
947 pch_gbe_unmap_and_free_tx_resource(adapter, buffer_info);
949 netdev_dbg(adapter->netdev,
950 "call pch_gbe_unmap_and_free_tx_resource() %d count\n", i);
952 size = (unsigned long)sizeof(struct pch_gbe_buffer) * tx_ring->count;
953 memset(tx_ring->buffer_info, 0, size);
955 /* Zero out the descriptor ring */
956 memset(tx_ring->desc, 0, tx_ring->size);
957 tx_ring->next_to_use = 0;
958 tx_ring->next_to_clean = 0;
959 iowrite32(tx_ring->dma, &hw->reg->TX_DSC_HW_P);
960 iowrite32((tx_ring->size - 0x10), &hw->reg->TX_DSC_SIZE);
964 * pch_gbe_clean_rx_ring - Free Rx Buffers
965 * @adapter: Board private structure
966 * @rx_ring: Ring to free buffers from
969 pch_gbe_clean_rx_ring(struct pch_gbe_adapter *adapter,
970 struct pch_gbe_rx_ring *rx_ring)
972 struct pch_gbe_hw *hw = &adapter->hw;
973 struct pch_gbe_buffer *buffer_info;
977 /* Free all the Rx ring sk_buffs */
978 for (i = 0; i < rx_ring->count; i++) {
979 buffer_info = &rx_ring->buffer_info[i];
980 pch_gbe_unmap_and_free_rx_resource(adapter, buffer_info);
982 netdev_dbg(adapter->netdev,
983 "call pch_gbe_unmap_and_free_rx_resource() %d count\n", i);
984 size = (unsigned long)sizeof(struct pch_gbe_buffer) * rx_ring->count;
985 memset(rx_ring->buffer_info, 0, size);
987 /* Zero out the descriptor ring */
988 memset(rx_ring->desc, 0, rx_ring->size);
989 rx_ring->next_to_clean = 0;
990 rx_ring->next_to_use = 0;
991 iowrite32(rx_ring->dma, &hw->reg->RX_DSC_HW_P);
992 iowrite32((rx_ring->size - 0x10), &hw->reg->RX_DSC_SIZE);
995 static void pch_gbe_set_rgmii_ctrl(struct pch_gbe_adapter *adapter, u16 speed,
998 struct pch_gbe_hw *hw = &adapter->hw;
999 unsigned long rgmii = 0;
1001 /* Set the RGMII control. */
1004 rgmii = (PCH_GBE_RGMII_RATE_2_5M |
1005 PCH_GBE_MAC_RGMII_CTRL_SETTING);
1008 rgmii = (PCH_GBE_RGMII_RATE_25M |
1009 PCH_GBE_MAC_RGMII_CTRL_SETTING);
1012 rgmii = (PCH_GBE_RGMII_RATE_125M |
1013 PCH_GBE_MAC_RGMII_CTRL_SETTING);
1016 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
1018 static void pch_gbe_set_mode(struct pch_gbe_adapter *adapter, u16 speed,
1021 struct net_device *netdev = adapter->netdev;
1022 struct pch_gbe_hw *hw = &adapter->hw;
1023 unsigned long mode = 0;
1025 /* Set the communication mode */
1028 mode = PCH_GBE_MODE_MII_ETHER;
1029 netdev->tx_queue_len = 10;
1032 mode = PCH_GBE_MODE_MII_ETHER;
1033 netdev->tx_queue_len = 100;
1036 mode = PCH_GBE_MODE_GMII_ETHER;
1039 if (duplex == DUPLEX_FULL)
1040 mode |= PCH_GBE_MODE_FULL_DUPLEX;
1042 mode |= PCH_GBE_MODE_HALF_DUPLEX;
1043 iowrite32(mode, &hw->reg->MODE);
1047 * pch_gbe_watchdog - Watchdog process
1048 * @data: Board private structure
1050 static void pch_gbe_watchdog(struct timer_list *t)
1052 struct pch_gbe_adapter *adapter = from_timer(adapter, t,
1054 struct net_device *netdev = adapter->netdev;
1055 struct pch_gbe_hw *hw = &adapter->hw;
1057 netdev_dbg(netdev, "right now = %ld\n", jiffies);
1059 pch_gbe_update_stats(adapter);
1060 if ((mii_link_ok(&adapter->mii)) && (!netif_carrier_ok(netdev))) {
1061 struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
1062 netdev->tx_queue_len = adapter->tx_queue_len;
1063 /* mii library handles link maintenance tasks */
1064 if (mii_ethtool_gset(&adapter->mii, &cmd)) {
1065 netdev_err(netdev, "ethtool get setting Error\n");
1066 mod_timer(&adapter->watchdog_timer,
1067 round_jiffies(jiffies +
1068 PCH_GBE_WATCHDOG_PERIOD));
1071 hw->mac.link_speed = ethtool_cmd_speed(&cmd);
1072 hw->mac.link_duplex = cmd.duplex;
1073 /* Set the RGMII control. */
1074 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
1075 hw->mac.link_duplex);
1076 /* Set the communication mode */
1077 pch_gbe_set_mode(adapter, hw->mac.link_speed,
1078 hw->mac.link_duplex);
1080 "Link is Up %d Mbps %s-Duplex\n",
1082 cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
1083 netif_carrier_on(netdev);
1084 netif_wake_queue(netdev);
1085 } else if ((!mii_link_ok(&adapter->mii)) &&
1086 (netif_carrier_ok(netdev))) {
1087 netdev_dbg(netdev, "NIC Link is Down\n");
1088 hw->mac.link_speed = SPEED_10;
1089 hw->mac.link_duplex = DUPLEX_HALF;
1090 netif_carrier_off(netdev);
1091 netif_stop_queue(netdev);
1093 mod_timer(&adapter->watchdog_timer,
1094 round_jiffies(jiffies + PCH_GBE_WATCHDOG_PERIOD));
1098 * pch_gbe_tx_queue - Carry out queuing of the transmission data
1099 * @adapter: Board private structure
1100 * @tx_ring: Tx descriptor ring structure
1101 * @skb: Sockt buffer structure
1103 static void pch_gbe_tx_queue(struct pch_gbe_adapter *adapter,
1104 struct pch_gbe_tx_ring *tx_ring,
1105 struct sk_buff *skb)
1107 struct pch_gbe_hw *hw = &adapter->hw;
1108 struct pch_gbe_tx_desc *tx_desc;
1109 struct pch_gbe_buffer *buffer_info;
1110 struct sk_buff *tmp_skb;
1111 unsigned int frame_ctrl;
1112 unsigned int ring_num;
1114 /*-- Set frame control --*/
1116 if (unlikely(skb->len < PCH_GBE_SHORT_PKT))
1117 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD;
1118 if (skb->ip_summed == CHECKSUM_NONE)
1119 frame_ctrl |= PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
1121 /* Performs checksum processing */
1123 * It is because the hardware accelerator does not support a checksum,
1124 * when the received data size is less than 64 bytes.
1126 if (skb->len < PCH_GBE_SHORT_PKT && skb->ip_summed != CHECKSUM_NONE) {
1127 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD |
1128 PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
1129 if (skb->protocol == htons(ETH_P_IP)) {
1130 struct iphdr *iph = ip_hdr(skb);
1131 unsigned int offset;
1132 offset = skb_transport_offset(skb);
1133 if (iph->protocol == IPPROTO_TCP) {
1135 tcp_hdr(skb)->check = 0;
1136 skb->csum = skb_checksum(skb, offset,
1137 skb->len - offset, 0);
1138 tcp_hdr(skb)->check =
1139 csum_tcpudp_magic(iph->saddr,
1144 } else if (iph->protocol == IPPROTO_UDP) {
1146 udp_hdr(skb)->check = 0;
1148 skb_checksum(skb, offset,
1149 skb->len - offset, 0);
1150 udp_hdr(skb)->check =
1151 csum_tcpudp_magic(iph->saddr,
1160 ring_num = tx_ring->next_to_use;
1161 if (unlikely((ring_num + 1) == tx_ring->count))
1162 tx_ring->next_to_use = 0;
1164 tx_ring->next_to_use = ring_num + 1;
1167 buffer_info = &tx_ring->buffer_info[ring_num];
1168 tmp_skb = buffer_info->skb;
1170 /* [Header:14][payload] ---> [Header:14][paddong:2][payload] */
1171 memcpy(tmp_skb->data, skb->data, ETH_HLEN);
1172 tmp_skb->data[ETH_HLEN] = 0x00;
1173 tmp_skb->data[ETH_HLEN + 1] = 0x00;
1174 tmp_skb->len = skb->len;
1175 memcpy(&tmp_skb->data[ETH_HLEN + 2], &skb->data[ETH_HLEN],
1176 (skb->len - ETH_HLEN));
1177 /*-- Set Buffer information --*/
1178 buffer_info->length = tmp_skb->len;
1179 buffer_info->dma = dma_map_single(&adapter->pdev->dev, tmp_skb->data,
1180 buffer_info->length,
1182 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1183 netdev_err(adapter->netdev, "TX DMA map failed\n");
1184 buffer_info->dma = 0;
1185 buffer_info->time_stamp = 0;
1186 tx_ring->next_to_use = ring_num;
1189 buffer_info->mapped = true;
1190 buffer_info->time_stamp = jiffies;
1192 /*-- Set Tx descriptor --*/
1193 tx_desc = PCH_GBE_TX_DESC(*tx_ring, ring_num);
1194 tx_desc->buffer_addr = (buffer_info->dma);
1195 tx_desc->length = (tmp_skb->len);
1196 tx_desc->tx_words_eob = ((tmp_skb->len + 3));
1197 tx_desc->tx_frame_ctrl = (frame_ctrl);
1198 tx_desc->gbec_status = (DSC_INIT16);
1200 if (unlikely(++ring_num == tx_ring->count))
1203 /* Update software pointer of TX descriptor */
1204 iowrite32(tx_ring->dma +
1205 (int)sizeof(struct pch_gbe_tx_desc) * ring_num,
1206 &hw->reg->TX_DSC_SW_P);
1208 pch_tx_timestamp(adapter, skb);
1210 dev_kfree_skb_any(skb);
1214 * pch_gbe_update_stats - Update the board statistics counters
1215 * @adapter: Board private structure
1217 void pch_gbe_update_stats(struct pch_gbe_adapter *adapter)
1219 struct net_device *netdev = adapter->netdev;
1220 struct pci_dev *pdev = adapter->pdev;
1221 struct pch_gbe_hw_stats *stats = &adapter->stats;
1222 unsigned long flags;
1225 * Prevent stats update while adapter is being reset, or if the pci
1226 * connection is down.
1228 if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
1231 spin_lock_irqsave(&adapter->stats_lock, flags);
1233 /* Update device status "adapter->stats" */
1234 stats->rx_errors = stats->rx_crc_errors + stats->rx_frame_errors;
1235 stats->tx_errors = stats->tx_length_errors +
1236 stats->tx_aborted_errors +
1237 stats->tx_carrier_errors + stats->tx_timeout_count;
1239 /* Update network device status "adapter->net_stats" */
1240 netdev->stats.rx_packets = stats->rx_packets;
1241 netdev->stats.rx_bytes = stats->rx_bytes;
1242 netdev->stats.rx_dropped = stats->rx_dropped;
1243 netdev->stats.tx_packets = stats->tx_packets;
1244 netdev->stats.tx_bytes = stats->tx_bytes;
1245 netdev->stats.tx_dropped = stats->tx_dropped;
1246 /* Fill out the OS statistics structure */
1247 netdev->stats.multicast = stats->multicast;
1248 netdev->stats.collisions = stats->collisions;
1250 netdev->stats.rx_errors = stats->rx_errors;
1251 netdev->stats.rx_crc_errors = stats->rx_crc_errors;
1252 netdev->stats.rx_frame_errors = stats->rx_frame_errors;
1254 netdev->stats.tx_errors = stats->tx_errors;
1255 netdev->stats.tx_aborted_errors = stats->tx_aborted_errors;
1256 netdev->stats.tx_carrier_errors = stats->tx_carrier_errors;
1258 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1261 static void pch_gbe_disable_dma_rx(struct pch_gbe_hw *hw)
1265 /* Disable Receive DMA */
1266 rxdma = ioread32(&hw->reg->DMA_CTRL);
1267 rxdma &= ~PCH_GBE_RX_DMA_EN;
1268 iowrite32(rxdma, &hw->reg->DMA_CTRL);
1271 static void pch_gbe_enable_dma_rx(struct pch_gbe_hw *hw)
1275 /* Enables Receive DMA */
1276 rxdma = ioread32(&hw->reg->DMA_CTRL);
1277 rxdma |= PCH_GBE_RX_DMA_EN;
1278 iowrite32(rxdma, &hw->reg->DMA_CTRL);
1282 * pch_gbe_intr - Interrupt Handler
1283 * @irq: Interrupt number
1284 * @data: Pointer to a network interface device structure
1286 * - IRQ_HANDLED: Our interrupt
1287 * - IRQ_NONE: Not our interrupt
1289 static irqreturn_t pch_gbe_intr(int irq, void *data)
1291 struct net_device *netdev = data;
1292 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1293 struct pch_gbe_hw *hw = &adapter->hw;
1297 /* Check request status */
1298 int_st = ioread32(&hw->reg->INT_ST);
1299 int_st = int_st & ioread32(&hw->reg->INT_EN);
1300 /* When request status is no interruption factor */
1301 if (unlikely(!int_st))
1302 return IRQ_NONE; /* Not our interrupt. End processing. */
1303 netdev_dbg(netdev, "%s occur int_st = 0x%08x\n", __func__, int_st);
1304 if (int_st & PCH_GBE_INT_RX_FRAME_ERR)
1305 adapter->stats.intr_rx_frame_err_count++;
1306 if (int_st & PCH_GBE_INT_RX_FIFO_ERR)
1307 if (!adapter->rx_stop_flag) {
1308 adapter->stats.intr_rx_fifo_err_count++;
1309 netdev_dbg(netdev, "Rx fifo over run\n");
1310 adapter->rx_stop_flag = true;
1311 int_en = ioread32(&hw->reg->INT_EN);
1312 iowrite32((int_en & ~PCH_GBE_INT_RX_FIFO_ERR),
1314 pch_gbe_disable_dma_rx(&adapter->hw);
1315 int_st |= ioread32(&hw->reg->INT_ST);
1316 int_st = int_st & ioread32(&hw->reg->INT_EN);
1318 if (int_st & PCH_GBE_INT_RX_DMA_ERR)
1319 adapter->stats.intr_rx_dma_err_count++;
1320 if (int_st & PCH_GBE_INT_TX_FIFO_ERR)
1321 adapter->stats.intr_tx_fifo_err_count++;
1322 if (int_st & PCH_GBE_INT_TX_DMA_ERR)
1323 adapter->stats.intr_tx_dma_err_count++;
1324 if (int_st & PCH_GBE_INT_TCPIP_ERR)
1325 adapter->stats.intr_tcpip_err_count++;
1326 /* When Rx descriptor is empty */
1327 if ((int_st & PCH_GBE_INT_RX_DSC_EMP)) {
1328 adapter->stats.intr_rx_dsc_empty_count++;
1329 netdev_dbg(netdev, "Rx descriptor is empty\n");
1330 int_en = ioread32(&hw->reg->INT_EN);
1331 iowrite32((int_en & ~PCH_GBE_INT_RX_DSC_EMP), &hw->reg->INT_EN);
1332 if (hw->mac.tx_fc_enable) {
1333 /* Set Pause packet */
1334 pch_gbe_mac_set_pause_packet(hw);
1338 /* When request status is Receive interruption */
1339 if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT)) ||
1340 (adapter->rx_stop_flag)) {
1341 if (likely(napi_schedule_prep(&adapter->napi))) {
1342 /* Enable only Rx Descriptor empty */
1343 atomic_inc(&adapter->irq_sem);
1344 int_en = ioread32(&hw->reg->INT_EN);
1346 ~(PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT);
1347 iowrite32(int_en, &hw->reg->INT_EN);
1348 /* Start polling for NAPI */
1349 __napi_schedule(&adapter->napi);
1352 netdev_dbg(netdev, "return = 0x%08x INT_EN reg = 0x%08x\n",
1353 IRQ_HANDLED, ioread32(&hw->reg->INT_EN));
1358 * pch_gbe_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1359 * @adapter: Board private structure
1360 * @rx_ring: Rx descriptor ring
1361 * @cleaned_count: Cleaned count
1364 pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter *adapter,
1365 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1367 struct net_device *netdev = adapter->netdev;
1368 struct pci_dev *pdev = adapter->pdev;
1369 struct pch_gbe_hw *hw = &adapter->hw;
1370 struct pch_gbe_rx_desc *rx_desc;
1371 struct pch_gbe_buffer *buffer_info;
1372 struct sk_buff *skb;
1376 bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
1377 i = rx_ring->next_to_use;
1379 while ((cleaned_count--)) {
1380 buffer_info = &rx_ring->buffer_info[i];
1381 skb = netdev_alloc_skb(netdev, bufsz);
1382 if (unlikely(!skb)) {
1383 /* Better luck next round */
1384 adapter->stats.rx_alloc_buff_failed++;
1388 skb_reserve(skb, NET_IP_ALIGN);
1389 buffer_info->skb = skb;
1391 buffer_info->dma = dma_map_single(&pdev->dev,
1392 buffer_info->rx_buffer,
1393 buffer_info->length,
1395 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1397 buffer_info->skb = NULL;
1398 buffer_info->dma = 0;
1399 adapter->stats.rx_alloc_buff_failed++;
1400 break; /* while !buffer_info->skb */
1402 buffer_info->mapped = true;
1403 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1404 rx_desc->buffer_addr = (buffer_info->dma);
1405 rx_desc->gbec_status = DSC_INIT16;
1408 "i = %d buffer_info->dma = 0x08%llx buffer_info->length = 0x%x\n",
1409 i, (unsigned long long)buffer_info->dma,
1410 buffer_info->length);
1412 if (unlikely(++i == rx_ring->count))
1415 if (likely(rx_ring->next_to_use != i)) {
1416 rx_ring->next_to_use = i;
1417 if (unlikely(i-- == 0))
1418 i = (rx_ring->count - 1);
1419 iowrite32(rx_ring->dma +
1420 (int)sizeof(struct pch_gbe_rx_desc) * i,
1421 &hw->reg->RX_DSC_SW_P);
1427 pch_gbe_alloc_rx_buffers_pool(struct pch_gbe_adapter *adapter,
1428 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1430 struct pci_dev *pdev = adapter->pdev;
1431 struct pch_gbe_buffer *buffer_info;
1436 bufsz = adapter->rx_buffer_len;
1438 size = rx_ring->count * bufsz + PCH_GBE_RESERVE_MEMORY;
1439 rx_ring->rx_buff_pool =
1440 dma_alloc_coherent(&pdev->dev, size,
1441 &rx_ring->rx_buff_pool_logic, GFP_KERNEL);
1442 if (!rx_ring->rx_buff_pool)
1445 rx_ring->rx_buff_pool_size = size;
1446 for (i = 0; i < rx_ring->count; i++) {
1447 buffer_info = &rx_ring->buffer_info[i];
1448 buffer_info->rx_buffer = rx_ring->rx_buff_pool + bufsz * i;
1449 buffer_info->length = bufsz;
1455 * pch_gbe_alloc_tx_buffers - Allocate transmit buffers
1456 * @adapter: Board private structure
1457 * @tx_ring: Tx descriptor ring
1459 static void pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter *adapter,
1460 struct pch_gbe_tx_ring *tx_ring)
1462 struct pch_gbe_buffer *buffer_info;
1463 struct sk_buff *skb;
1466 struct pch_gbe_tx_desc *tx_desc;
1469 adapter->hw.mac.max_frame_size + PCH_GBE_DMA_ALIGN + NET_IP_ALIGN;
1471 for (i = 0; i < tx_ring->count; i++) {
1472 buffer_info = &tx_ring->buffer_info[i];
1473 skb = netdev_alloc_skb(adapter->netdev, bufsz);
1474 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1475 buffer_info->skb = skb;
1476 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1477 tx_desc->gbec_status = (DSC_INIT16);
1483 * pch_gbe_clean_tx - Reclaim resources after transmit completes
1484 * @adapter: Board private structure
1485 * @tx_ring: Tx descriptor ring
1487 * true: Cleaned the descriptor
1488 * false: Not cleaned the descriptor
1491 pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
1492 struct pch_gbe_tx_ring *tx_ring)
1494 struct pch_gbe_tx_desc *tx_desc;
1495 struct pch_gbe_buffer *buffer_info;
1496 struct sk_buff *skb;
1498 unsigned int cleaned_count = 0;
1499 bool cleaned = false;
1502 netdev_dbg(adapter->netdev, "next_to_clean : %d\n",
1503 tx_ring->next_to_clean);
1505 i = tx_ring->next_to_clean;
1506 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1507 netdev_dbg(adapter->netdev, "gbec_status:0x%04x dma_status:0x%04x\n",
1508 tx_desc->gbec_status, tx_desc->dma_status);
1510 unused = PCH_GBE_DESC_UNUSED(tx_ring);
1511 thresh = tx_ring->count - PCH_GBE_TX_WEIGHT;
1512 if ((tx_desc->gbec_status == DSC_INIT16) && (unused < thresh))
1513 { /* current marked clean, tx queue filling up, do extra clean */
1515 if (unused < 8) { /* tx queue nearly full */
1516 netdev_dbg(adapter->netdev,
1517 "clean_tx: transmit queue warning (%x,%x) unused=%d\n",
1518 tx_ring->next_to_clean, tx_ring->next_to_use,
1522 /* current marked clean, scan for more that need cleaning. */
1524 for (j = 0; j < PCH_GBE_TX_WEIGHT; j++)
1526 tx_desc = PCH_GBE_TX_DESC(*tx_ring, k);
1527 if (tx_desc->gbec_status != DSC_INIT16) break; /*found*/
1528 if (++k >= tx_ring->count) k = 0; /*increment, wrap*/
1530 if (j < PCH_GBE_TX_WEIGHT) {
1531 netdev_dbg(adapter->netdev,
1532 "clean_tx: unused=%d loops=%d found tx_desc[%x,%x:%x].gbec_status=%04x\n",
1533 unused, j, i, k, tx_ring->next_to_use,
1534 tx_desc->gbec_status);
1535 i = k; /*found one to clean, usu gbec_status==2000.*/
1539 while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
1540 netdev_dbg(adapter->netdev, "gbec_status:0x%04x\n",
1541 tx_desc->gbec_status);
1542 buffer_info = &tx_ring->buffer_info[i];
1543 skb = buffer_info->skb;
1546 if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
1547 adapter->stats.tx_aborted_errors++;
1548 netdev_err(adapter->netdev, "Transfer Abort Error\n");
1549 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CRSER)
1551 adapter->stats.tx_carrier_errors++;
1552 netdev_err(adapter->netdev,
1553 "Transfer Carrier Sense Error\n");
1554 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_EXCOL)
1556 adapter->stats.tx_aborted_errors++;
1557 netdev_err(adapter->netdev,
1558 "Transfer Collision Abort Error\n");
1559 } else if ((tx_desc->gbec_status &
1560 (PCH_GBE_TXD_GMAC_STAT_SNGCOL |
1561 PCH_GBE_TXD_GMAC_STAT_MLTCOL))) {
1562 adapter->stats.collisions++;
1563 adapter->stats.tx_packets++;
1564 adapter->stats.tx_bytes += skb->len;
1565 netdev_dbg(adapter->netdev, "Transfer Collision\n");
1566 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CMPLT)
1568 adapter->stats.tx_packets++;
1569 adapter->stats.tx_bytes += skb->len;
1571 if (buffer_info->mapped) {
1572 netdev_dbg(adapter->netdev,
1573 "unmap buffer_info->dma : %d\n", i);
1574 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1575 buffer_info->length, DMA_TO_DEVICE);
1576 buffer_info->mapped = false;
1578 if (buffer_info->skb) {
1579 netdev_dbg(adapter->netdev,
1580 "trim buffer_info->skb : %d\n", i);
1581 skb_trim(buffer_info->skb, 0);
1583 tx_desc->gbec_status = DSC_INIT16;
1584 if (unlikely(++i == tx_ring->count))
1586 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1588 /* weight of a sort for tx, to avoid endless transmit cleanup */
1589 if (cleaned_count++ == PCH_GBE_TX_WEIGHT) {
1594 netdev_dbg(adapter->netdev,
1595 "called pch_gbe_unmap_and_free_tx_resource() %d count\n",
1597 if (cleaned_count > 0) { /*skip this if nothing cleaned*/
1598 /* Recover from running out of Tx resources in xmit_frame */
1599 netif_tx_lock(adapter->netdev);
1600 if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev))))
1602 netif_wake_queue(adapter->netdev);
1603 adapter->stats.tx_restart_count++;
1604 netdev_dbg(adapter->netdev, "Tx wake queue\n");
1607 tx_ring->next_to_clean = i;
1609 netdev_dbg(adapter->netdev, "next_to_clean : %d\n",
1610 tx_ring->next_to_clean);
1611 netif_tx_unlock(adapter->netdev);
1617 * pch_gbe_clean_rx - Send received data up the network stack; legacy
1618 * @adapter: Board private structure
1619 * @rx_ring: Rx descriptor ring
1620 * @work_done: Completed count
1621 * @work_to_do: Request count
1623 * true: Cleaned the descriptor
1624 * false: Not cleaned the descriptor
1627 pch_gbe_clean_rx(struct pch_gbe_adapter *adapter,
1628 struct pch_gbe_rx_ring *rx_ring,
1629 int *work_done, int work_to_do)
1631 struct net_device *netdev = adapter->netdev;
1632 struct pci_dev *pdev = adapter->pdev;
1633 struct pch_gbe_buffer *buffer_info;
1634 struct pch_gbe_rx_desc *rx_desc;
1637 unsigned int cleaned_count = 0;
1638 bool cleaned = false;
1639 struct sk_buff *skb;
1644 i = rx_ring->next_to_clean;
1646 while (*work_done < work_to_do) {
1647 /* Check Rx descriptor status */
1648 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1649 if (rx_desc->gbec_status == DSC_INIT16)
1654 dma_status = rx_desc->dma_status;
1655 gbec_status = rx_desc->gbec_status;
1656 tcp_ip_status = rx_desc->tcp_ip_status;
1657 rx_desc->gbec_status = DSC_INIT16;
1658 buffer_info = &rx_ring->buffer_info[i];
1659 skb = buffer_info->skb;
1660 buffer_info->skb = NULL;
1663 dma_unmap_single(&pdev->dev, buffer_info->dma,
1664 buffer_info->length, DMA_FROM_DEVICE);
1665 buffer_info->mapped = false;
1668 "RxDecNo = 0x%04x Status[DMA:0x%02x GBE:0x%04x TCP:0x%08x] BufInf = 0x%p\n",
1669 i, dma_status, gbec_status, tcp_ip_status,
1672 if (unlikely(gbec_status & PCH_GBE_RXD_GMAC_STAT_NOTOCTAL)) {
1673 adapter->stats.rx_frame_errors++;
1674 netdev_err(netdev, "Receive Not Octal Error\n");
1675 } else if (unlikely(gbec_status &
1676 PCH_GBE_RXD_GMAC_STAT_NBLERR)) {
1677 adapter->stats.rx_frame_errors++;
1678 netdev_err(netdev, "Receive Nibble Error\n");
1679 } else if (unlikely(gbec_status &
1680 PCH_GBE_RXD_GMAC_STAT_CRCERR)) {
1681 adapter->stats.rx_crc_errors++;
1682 netdev_err(netdev, "Receive CRC Error\n");
1684 /* get receive length */
1685 /* length convert[-3], length includes FCS length */
1686 length = (rx_desc->rx_words_eob) - 3 - ETH_FCS_LEN;
1687 if (rx_desc->rx_words_eob & 0x02)
1688 length = length - 4;
1690 * buffer_info->rx_buffer: [Header:14][payload]
1691 * skb->data: [Reserve:2][Header:14][payload]
1693 memcpy(skb->data, buffer_info->rx_buffer, length);
1695 /* update status of driver */
1696 adapter->stats.rx_bytes += length;
1697 adapter->stats.rx_packets++;
1698 if ((gbec_status & PCH_GBE_RXD_GMAC_STAT_MARMLT))
1699 adapter->stats.multicast++;
1700 /* Write meta date of skb */
1701 skb_put(skb, length);
1703 pch_rx_timestamp(adapter, skb);
1705 skb->protocol = eth_type_trans(skb, netdev);
1706 if (tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK)
1707 skb->ip_summed = CHECKSUM_UNNECESSARY;
1709 skb->ip_summed = CHECKSUM_NONE;
1711 napi_gro_receive(&adapter->napi, skb);
1714 "Receive skb->ip_summed: %d length: %d\n",
1715 skb->ip_summed, length);
1717 /* return some buffers to hardware, one at a time is too slow */
1718 if (unlikely(cleaned_count >= PCH_GBE_RX_BUFFER_WRITE)) {
1719 pch_gbe_alloc_rx_buffers(adapter, rx_ring,
1723 if (++i == rx_ring->count)
1726 rx_ring->next_to_clean = i;
1728 pch_gbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1733 * pch_gbe_setup_tx_resources - Allocate Tx resources (Descriptors)
1734 * @adapter: Board private structure
1735 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
1738 * Negative value: Failed
1740 int pch_gbe_setup_tx_resources(struct pch_gbe_adapter *adapter,
1741 struct pch_gbe_tx_ring *tx_ring)
1743 struct pci_dev *pdev = adapter->pdev;
1744 struct pch_gbe_tx_desc *tx_desc;
1748 size = (int)sizeof(struct pch_gbe_buffer) * tx_ring->count;
1749 tx_ring->buffer_info = vzalloc(size);
1750 if (!tx_ring->buffer_info)
1753 tx_ring->size = tx_ring->count * (int)sizeof(struct pch_gbe_tx_desc);
1755 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
1756 &tx_ring->dma, GFP_KERNEL);
1757 if (!tx_ring->desc) {
1758 vfree(tx_ring->buffer_info);
1762 tx_ring->next_to_use = 0;
1763 tx_ring->next_to_clean = 0;
1765 for (desNo = 0; desNo < tx_ring->count; desNo++) {
1766 tx_desc = PCH_GBE_TX_DESC(*tx_ring, desNo);
1767 tx_desc->gbec_status = DSC_INIT16;
1769 netdev_dbg(adapter->netdev,
1770 "tx_ring->desc = 0x%p tx_ring->dma = 0x%08llx next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1771 tx_ring->desc, (unsigned long long)tx_ring->dma,
1772 tx_ring->next_to_clean, tx_ring->next_to_use);
1777 * pch_gbe_setup_rx_resources - Allocate Rx resources (Descriptors)
1778 * @adapter: Board private structure
1779 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
1782 * Negative value: Failed
1784 int pch_gbe_setup_rx_resources(struct pch_gbe_adapter *adapter,
1785 struct pch_gbe_rx_ring *rx_ring)
1787 struct pci_dev *pdev = adapter->pdev;
1788 struct pch_gbe_rx_desc *rx_desc;
1792 size = (int)sizeof(struct pch_gbe_buffer) * rx_ring->count;
1793 rx_ring->buffer_info = vzalloc(size);
1794 if (!rx_ring->buffer_info)
1797 rx_ring->size = rx_ring->count * (int)sizeof(struct pch_gbe_rx_desc);
1798 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
1799 &rx_ring->dma, GFP_KERNEL);
1800 if (!rx_ring->desc) {
1801 vfree(rx_ring->buffer_info);
1804 rx_ring->next_to_clean = 0;
1805 rx_ring->next_to_use = 0;
1806 for (desNo = 0; desNo < rx_ring->count; desNo++) {
1807 rx_desc = PCH_GBE_RX_DESC(*rx_ring, desNo);
1808 rx_desc->gbec_status = DSC_INIT16;
1810 netdev_dbg(adapter->netdev,
1811 "rx_ring->desc = 0x%p rx_ring->dma = 0x%08llx next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1812 rx_ring->desc, (unsigned long long)rx_ring->dma,
1813 rx_ring->next_to_clean, rx_ring->next_to_use);
1818 * pch_gbe_free_tx_resources - Free Tx Resources
1819 * @adapter: Board private structure
1820 * @tx_ring: Tx descriptor ring for a specific queue
1822 void pch_gbe_free_tx_resources(struct pch_gbe_adapter *adapter,
1823 struct pch_gbe_tx_ring *tx_ring)
1825 struct pci_dev *pdev = adapter->pdev;
1827 pch_gbe_clean_tx_ring(adapter, tx_ring);
1828 vfree(tx_ring->buffer_info);
1829 tx_ring->buffer_info = NULL;
1830 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1831 tx_ring->desc = NULL;
1835 * pch_gbe_free_rx_resources - Free Rx Resources
1836 * @adapter: Board private structure
1837 * @rx_ring: Ring to clean the resources from
1839 void pch_gbe_free_rx_resources(struct pch_gbe_adapter *adapter,
1840 struct pch_gbe_rx_ring *rx_ring)
1842 struct pci_dev *pdev = adapter->pdev;
1844 pch_gbe_clean_rx_ring(adapter, rx_ring);
1845 vfree(rx_ring->buffer_info);
1846 rx_ring->buffer_info = NULL;
1847 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1848 rx_ring->desc = NULL;
1852 * pch_gbe_request_irq - Allocate an interrupt line
1853 * @adapter: Board private structure
1856 * Negative value: Failed
1858 static int pch_gbe_request_irq(struct pch_gbe_adapter *adapter)
1860 struct net_device *netdev = adapter->netdev;
1863 err = pci_alloc_irq_vectors(adapter->pdev, 1, 1, PCI_IRQ_ALL_TYPES);
1867 adapter->irq = pci_irq_vector(adapter->pdev, 0);
1869 err = request_irq(adapter->irq, &pch_gbe_intr, IRQF_SHARED,
1870 netdev->name, netdev);
1872 netdev_err(netdev, "Unable to allocate interrupt Error: %d\n",
1874 netdev_dbg(netdev, "have_msi : %d return : 0x%04x\n",
1875 pci_dev_msi_enabled(adapter->pdev), err);
1880 * pch_gbe_up - Up GbE network device
1881 * @adapter: Board private structure
1884 * Negative value: Failed
1886 int pch_gbe_up(struct pch_gbe_adapter *adapter)
1888 struct net_device *netdev = adapter->netdev;
1889 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1890 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1893 /* Ensure we have a valid MAC */
1894 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
1895 netdev_err(netdev, "Error: Invalid MAC address\n");
1899 /* hardware has been reset, we need to reload some things */
1900 pch_gbe_set_multi(netdev);
1902 pch_gbe_setup_tctl(adapter);
1903 pch_gbe_configure_tx(adapter);
1904 pch_gbe_setup_rctl(adapter);
1905 pch_gbe_configure_rx(adapter);
1907 err = pch_gbe_request_irq(adapter);
1910 "Error: can't bring device up - irq request failed\n");
1913 err = pch_gbe_alloc_rx_buffers_pool(adapter, rx_ring, rx_ring->count);
1916 "Error: can't bring device up - alloc rx buffers pool failed\n");
1919 pch_gbe_alloc_tx_buffers(adapter, tx_ring);
1920 pch_gbe_alloc_rx_buffers(adapter, rx_ring, rx_ring->count);
1921 adapter->tx_queue_len = netdev->tx_queue_len;
1922 pch_gbe_enable_dma_rx(&adapter->hw);
1923 pch_gbe_enable_mac_rx(&adapter->hw);
1925 mod_timer(&adapter->watchdog_timer, jiffies);
1927 napi_enable(&adapter->napi);
1928 pch_gbe_irq_enable(adapter);
1929 netif_start_queue(adapter->netdev);
1934 pch_gbe_free_irq(adapter);
1940 * pch_gbe_down - Down GbE network device
1941 * @adapter: Board private structure
1943 void pch_gbe_down(struct pch_gbe_adapter *adapter)
1945 struct net_device *netdev = adapter->netdev;
1946 struct pci_dev *pdev = adapter->pdev;
1947 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1949 /* signal that we're down so the interrupt handler does not
1950 * reschedule our watchdog timer */
1951 napi_disable(&adapter->napi);
1952 atomic_set(&adapter->irq_sem, 0);
1954 pch_gbe_irq_disable(adapter);
1955 pch_gbe_free_irq(adapter);
1957 del_timer_sync(&adapter->watchdog_timer);
1959 netdev->tx_queue_len = adapter->tx_queue_len;
1960 netif_carrier_off(netdev);
1961 netif_stop_queue(netdev);
1963 if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
1964 pch_gbe_reset(adapter);
1965 pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
1966 pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
1968 pci_free_consistent(adapter->pdev, rx_ring->rx_buff_pool_size,
1969 rx_ring->rx_buff_pool, rx_ring->rx_buff_pool_logic);
1970 rx_ring->rx_buff_pool_logic = 0;
1971 rx_ring->rx_buff_pool_size = 0;
1972 rx_ring->rx_buff_pool = NULL;
1976 * pch_gbe_sw_init - Initialize general software structures (struct pch_gbe_adapter)
1977 * @adapter: Board private structure to initialize
1980 * Negative value: Failed
1982 static int pch_gbe_sw_init(struct pch_gbe_adapter *adapter)
1984 struct pch_gbe_hw *hw = &adapter->hw;
1985 struct net_device *netdev = adapter->netdev;
1987 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
1988 hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1989 hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1990 hw->phy.reset_delay_us = PCH_GBE_PHY_RESET_DELAY_US;
1992 if (pch_gbe_alloc_queues(adapter)) {
1993 netdev_err(netdev, "Unable to allocate memory for queues\n");
1996 spin_lock_init(&adapter->hw.miim_lock);
1997 spin_lock_init(&adapter->stats_lock);
1998 spin_lock_init(&adapter->ethtool_lock);
1999 atomic_set(&adapter->irq_sem, 0);
2000 pch_gbe_irq_disable(adapter);
2002 pch_gbe_init_stats(adapter);
2005 "rx_buffer_len : %d mac.min_frame_size : %d mac.max_frame_size : %d\n",
2006 (u32) adapter->rx_buffer_len,
2007 hw->mac.min_frame_size, hw->mac.max_frame_size);
2012 * pch_gbe_open - Called when a network interface is made active
2013 * @netdev: Network interface device structure
2016 * Negative value: Failed
2018 static int pch_gbe_open(struct net_device *netdev)
2020 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2021 struct pch_gbe_hw *hw = &adapter->hw;
2024 /* allocate transmit descriptors */
2025 err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
2028 /* allocate receive descriptors */
2029 err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
2032 pch_gbe_phy_power_up(hw);
2033 err = pch_gbe_up(adapter);
2036 netdev_dbg(netdev, "Success End\n");
2040 if (!adapter->wake_up_evt)
2041 pch_gbe_phy_power_down(hw);
2042 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
2044 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
2046 pch_gbe_reset(adapter);
2047 netdev_err(netdev, "Error End\n");
2052 * pch_gbe_stop - Disables a network interface
2053 * @netdev: Network interface device structure
2057 static int pch_gbe_stop(struct net_device *netdev)
2059 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2060 struct pch_gbe_hw *hw = &adapter->hw;
2062 pch_gbe_down(adapter);
2063 if (!adapter->wake_up_evt)
2064 pch_gbe_phy_power_down(hw);
2065 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
2066 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
2071 * pch_gbe_xmit_frame - Packet transmitting start
2072 * @skb: Socket buffer structure
2073 * @netdev: Network interface device structure
2075 * - NETDEV_TX_OK: Normal end
2076 * - NETDEV_TX_BUSY: Error end
2078 static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2080 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2081 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
2083 if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) {
2084 netif_stop_queue(netdev);
2086 "Return : BUSY next_to use : 0x%08x next_to clean : 0x%08x\n",
2087 tx_ring->next_to_use, tx_ring->next_to_clean);
2088 return NETDEV_TX_BUSY;
2091 /* CRC,ITAG no support */
2092 pch_gbe_tx_queue(adapter, tx_ring, skb);
2093 return NETDEV_TX_OK;
2097 * pch_gbe_set_multi - Multicast and Promiscuous mode set
2098 * @netdev: Network interface device structure
2100 static void pch_gbe_set_multi(struct net_device *netdev)
2102 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2103 struct pch_gbe_hw *hw = &adapter->hw;
2104 struct netdev_hw_addr *ha;
2108 netdev_dbg(netdev, "netdev->flags : 0x%08x\n", netdev->flags);
2110 /* By default enable address & multicast filtering */
2111 rctl = ioread32(&hw->reg->RX_MODE);
2112 rctl |= PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN;
2114 /* Promiscuous mode disables all hardware address filtering */
2115 if (netdev->flags & IFF_PROMISC)
2116 rctl &= ~(PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN);
2118 /* If we want to monitor more multicast addresses than the hardware can
2119 * support then disable hardware multicast filtering.
2121 mc_count = netdev_mc_count(netdev);
2122 if ((netdev->flags & IFF_ALLMULTI) || mc_count >= PCH_GBE_MAR_ENTRIES)
2123 rctl &= ~PCH_GBE_MLT_FIL_EN;
2125 iowrite32(rctl, &hw->reg->RX_MODE);
2127 /* If we're not using multicast filtering then there's no point
2128 * configuring the unused MAC address registers.
2130 if (!(rctl & PCH_GBE_MLT_FIL_EN))
2133 /* Load the first set of multicast addresses into MAC address registers
2134 * for use by hardware filtering.
2137 netdev_for_each_mc_addr(ha, netdev)
2138 pch_gbe_mac_mar_set(hw, ha->addr, i++);
2140 /* If there are spare MAC registers, mask & clear them */
2141 for (; i < PCH_GBE_MAR_ENTRIES; i++) {
2142 /* Clear MAC address mask */
2143 adrmask = ioread32(&hw->reg->ADDR_MASK);
2144 iowrite32(adrmask | BIT(i), &hw->reg->ADDR_MASK);
2146 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
2147 /* Clear MAC address */
2148 iowrite32(0, &hw->reg->mac_adr[i].high);
2149 iowrite32(0, &hw->reg->mac_adr[i].low);
2153 "RX_MODE reg(check bit31,30 ADD,MLT) : 0x%08x netdev->mc_count : 0x%08x\n",
2154 ioread32(&hw->reg->RX_MODE), mc_count);
2158 * pch_gbe_set_mac - Change the Ethernet Address of the NIC
2159 * @netdev: Network interface device structure
2160 * @addr: Pointer to an address structure
2163 * -EADDRNOTAVAIL: Failed
2165 static int pch_gbe_set_mac(struct net_device *netdev, void *addr)
2167 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2168 struct sockaddr *skaddr = addr;
2171 if (!is_valid_ether_addr(skaddr->sa_data)) {
2172 ret_val = -EADDRNOTAVAIL;
2174 memcpy(netdev->dev_addr, skaddr->sa_data, netdev->addr_len);
2175 memcpy(adapter->hw.mac.addr, skaddr->sa_data, netdev->addr_len);
2176 pch_gbe_mac_mar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2179 netdev_dbg(netdev, "ret_val : 0x%08x\n", ret_val);
2180 netdev_dbg(netdev, "dev_addr : %pM\n", netdev->dev_addr);
2181 netdev_dbg(netdev, "mac_addr : %pM\n", adapter->hw.mac.addr);
2182 netdev_dbg(netdev, "MAC_ADR1AB reg : 0x%08x 0x%08x\n",
2183 ioread32(&adapter->hw.reg->mac_adr[0].high),
2184 ioread32(&adapter->hw.reg->mac_adr[0].low));
2189 * pch_gbe_change_mtu - Change the Maximum Transfer Unit
2190 * @netdev: Network interface device structure
2191 * @new_mtu: New value for maximum frame size
2196 static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
2198 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2199 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2200 unsigned long old_rx_buffer_len = adapter->rx_buffer_len;
2203 if (max_frame <= PCH_GBE_FRAME_SIZE_2048)
2204 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
2205 else if (max_frame <= PCH_GBE_FRAME_SIZE_4096)
2206 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_4096;
2207 else if (max_frame <= PCH_GBE_FRAME_SIZE_8192)
2208 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_8192;
2210 adapter->rx_buffer_len = PCH_GBE_MAX_RX_BUFFER_SIZE;
2212 if (netif_running(netdev)) {
2213 pch_gbe_down(adapter);
2214 err = pch_gbe_up(adapter);
2216 adapter->rx_buffer_len = old_rx_buffer_len;
2217 pch_gbe_up(adapter);
2220 netdev->mtu = new_mtu;
2221 adapter->hw.mac.max_frame_size = max_frame;
2224 pch_gbe_reset(adapter);
2225 netdev->mtu = new_mtu;
2226 adapter->hw.mac.max_frame_size = max_frame;
2230 "max_frame : %d rx_buffer_len : %d mtu : %d max_frame_size : %d\n",
2231 max_frame, (u32) adapter->rx_buffer_len, netdev->mtu,
2232 adapter->hw.mac.max_frame_size);
2237 * pch_gbe_set_features - Reset device after features changed
2238 * @netdev: Network interface device structure
2239 * @features: New features
2241 * 0: HW state updated successfully
2243 static int pch_gbe_set_features(struct net_device *netdev,
2244 netdev_features_t features)
2246 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2247 netdev_features_t changed = features ^ netdev->features;
2249 if (!(changed & NETIF_F_RXCSUM))
2252 if (netif_running(netdev))
2253 pch_gbe_reinit_locked(adapter);
2255 pch_gbe_reset(adapter);
2261 * pch_gbe_ioctl - Controls register through a MII interface
2262 * @netdev: Network interface device structure
2263 * @ifr: Pointer to ifr structure
2264 * @cmd: Control command
2267 * Negative value: Failed
2269 static int pch_gbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2271 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2273 netdev_dbg(netdev, "cmd : 0x%04x\n", cmd);
2275 if (cmd == SIOCSHWTSTAMP)
2276 return hwtstamp_ioctl(netdev, ifr, cmd);
2278 return generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
2282 * pch_gbe_tx_timeout - Respond to a Tx Hang
2283 * @netdev: Network interface device structure
2285 static void pch_gbe_tx_timeout(struct net_device *netdev)
2287 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2289 /* Do the reset outside of interrupt context */
2290 adapter->stats.tx_timeout_count++;
2291 schedule_work(&adapter->reset_task);
2295 * pch_gbe_napi_poll - NAPI receive and transfer polling callback
2296 * @napi: Pointer of polling device struct
2297 * @budget: The maximum number of a packet
2299 * false: Exit the polling mode
2300 * true: Continue the polling mode
2302 static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
2304 struct pch_gbe_adapter *adapter =
2305 container_of(napi, struct pch_gbe_adapter, napi);
2307 bool poll_end_flag = false;
2308 bool cleaned = false;
2310 netdev_dbg(adapter->netdev, "budget : %d\n", budget);
2312 pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
2313 cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
2317 /* If no Tx and not enough Rx work done,
2318 * exit the polling mode
2320 if (work_done < budget)
2321 poll_end_flag = true;
2323 if (poll_end_flag) {
2324 napi_complete_done(napi, work_done);
2325 pch_gbe_irq_enable(adapter);
2328 if (adapter->rx_stop_flag) {
2329 adapter->rx_stop_flag = false;
2330 pch_gbe_enable_dma_rx(&adapter->hw);
2333 netdev_dbg(adapter->netdev,
2334 "poll_end_flag : %d work_done : %d budget : %d\n",
2335 poll_end_flag, work_done, budget);
2340 #ifdef CONFIG_NET_POLL_CONTROLLER
2342 * pch_gbe_netpoll - Used by things like netconsole to send skbs
2343 * @netdev: Network interface device structure
2345 static void pch_gbe_netpoll(struct net_device *netdev)
2347 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2349 disable_irq(adapter->irq);
2350 pch_gbe_intr(adapter->irq, netdev);
2351 enable_irq(adapter->irq);
2355 static const struct net_device_ops pch_gbe_netdev_ops = {
2356 .ndo_open = pch_gbe_open,
2357 .ndo_stop = pch_gbe_stop,
2358 .ndo_start_xmit = pch_gbe_xmit_frame,
2359 .ndo_set_mac_address = pch_gbe_set_mac,
2360 .ndo_tx_timeout = pch_gbe_tx_timeout,
2361 .ndo_change_mtu = pch_gbe_change_mtu,
2362 .ndo_set_features = pch_gbe_set_features,
2363 .ndo_do_ioctl = pch_gbe_ioctl,
2364 .ndo_set_rx_mode = pch_gbe_set_multi,
2365 #ifdef CONFIG_NET_POLL_CONTROLLER
2366 .ndo_poll_controller = pch_gbe_netpoll,
2370 static pci_ers_result_t pch_gbe_io_error_detected(struct pci_dev *pdev,
2371 pci_channel_state_t state)
2373 struct net_device *netdev = pci_get_drvdata(pdev);
2374 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2376 netif_device_detach(netdev);
2377 if (netif_running(netdev))
2378 pch_gbe_down(adapter);
2379 pci_disable_device(pdev);
2380 /* Request a slot slot reset. */
2381 return PCI_ERS_RESULT_NEED_RESET;
2384 static pci_ers_result_t pch_gbe_io_slot_reset(struct pci_dev *pdev)
2386 struct net_device *netdev = pci_get_drvdata(pdev);
2387 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2388 struct pch_gbe_hw *hw = &adapter->hw;
2390 if (pci_enable_device(pdev)) {
2391 netdev_err(netdev, "Cannot re-enable PCI device after reset\n");
2392 return PCI_ERS_RESULT_DISCONNECT;
2394 pci_set_master(pdev);
2395 pci_enable_wake(pdev, PCI_D0, 0);
2396 pch_gbe_phy_power_up(hw);
2397 pch_gbe_reset(adapter);
2398 /* Clear wake up status */
2399 pch_gbe_mac_set_wol_event(hw, 0);
2401 return PCI_ERS_RESULT_RECOVERED;
2404 static void pch_gbe_io_resume(struct pci_dev *pdev)
2406 struct net_device *netdev = pci_get_drvdata(pdev);
2407 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2409 if (netif_running(netdev)) {
2410 if (pch_gbe_up(adapter)) {
2412 "can't bring device back up after reset\n");
2416 netif_device_attach(netdev);
2419 static int __pch_gbe_suspend(struct pci_dev *pdev)
2421 struct net_device *netdev = pci_get_drvdata(pdev);
2422 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2423 struct pch_gbe_hw *hw = &adapter->hw;
2424 u32 wufc = adapter->wake_up_evt;
2427 netif_device_detach(netdev);
2428 if (netif_running(netdev))
2429 pch_gbe_down(adapter);
2431 pch_gbe_set_multi(netdev);
2432 pch_gbe_setup_rctl(adapter);
2433 pch_gbe_configure_rx(adapter);
2434 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
2435 hw->mac.link_duplex);
2436 pch_gbe_set_mode(adapter, hw->mac.link_speed,
2437 hw->mac.link_duplex);
2438 pch_gbe_mac_set_wol_event(hw, wufc);
2439 pci_disable_device(pdev);
2441 pch_gbe_phy_power_down(hw);
2442 pch_gbe_mac_set_wol_event(hw, wufc);
2443 pci_disable_device(pdev);
2449 static int pch_gbe_suspend(struct device *device)
2451 struct pci_dev *pdev = to_pci_dev(device);
2453 return __pch_gbe_suspend(pdev);
2456 static int pch_gbe_resume(struct device *device)
2458 struct pci_dev *pdev = to_pci_dev(device);
2459 struct net_device *netdev = pci_get_drvdata(pdev);
2460 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2461 struct pch_gbe_hw *hw = &adapter->hw;
2464 err = pci_enable_device(pdev);
2466 netdev_err(netdev, "Cannot enable PCI device from suspend\n");
2469 pci_set_master(pdev);
2470 pch_gbe_phy_power_up(hw);
2471 pch_gbe_reset(adapter);
2472 /* Clear wake on lan control and status */
2473 pch_gbe_mac_set_wol_event(hw, 0);
2475 if (netif_running(netdev))
2476 pch_gbe_up(adapter);
2477 netif_device_attach(netdev);
2481 #endif /* CONFIG_PM */
2483 static void pch_gbe_shutdown(struct pci_dev *pdev)
2485 __pch_gbe_suspend(pdev);
2486 if (system_state == SYSTEM_POWER_OFF) {
2487 pci_wake_from_d3(pdev, true);
2488 pci_set_power_state(pdev, PCI_D3hot);
2492 static void pch_gbe_remove(struct pci_dev *pdev)
2494 struct net_device *netdev = pci_get_drvdata(pdev);
2495 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2497 cancel_work_sync(&adapter->reset_task);
2498 unregister_netdev(netdev);
2500 pch_gbe_phy_hw_reset(&adapter->hw);
2502 free_netdev(netdev);
2505 static int pch_gbe_probe(struct pci_dev *pdev,
2506 const struct pci_device_id *pci_id)
2508 struct net_device *netdev;
2509 struct pch_gbe_adapter *adapter;
2512 ret = pcim_enable_device(pdev);
2516 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
2517 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
2518 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2520 ret = pci_set_consistent_dma_mask(pdev,
2523 dev_err(&pdev->dev, "ERR: No usable DMA "
2524 "configuration, aborting\n");
2530 ret = pcim_iomap_regions(pdev, 1 << PCH_GBE_PCI_BAR, pci_name(pdev));
2533 "ERR: Can't reserve PCI I/O and memory resources\n");
2536 pci_set_master(pdev);
2538 netdev = alloc_etherdev((int)sizeof(struct pch_gbe_adapter));
2541 SET_NETDEV_DEV(netdev, &pdev->dev);
2543 pci_set_drvdata(pdev, netdev);
2544 adapter = netdev_priv(netdev);
2545 adapter->netdev = netdev;
2546 adapter->pdev = pdev;
2547 adapter->hw.back = adapter;
2548 adapter->hw.reg = pcim_iomap_table(pdev)[PCH_GBE_PCI_BAR];
2549 adapter->pdata = (struct pch_gbe_privdata *)pci_id->driver_data;
2550 if (adapter->pdata && adapter->pdata->platform_init)
2551 adapter->pdata->platform_init(pdev);
2554 pci_get_domain_bus_and_slot(pci_domain_nr(adapter->pdev->bus),
2555 adapter->pdev->bus->number,
2558 netdev->netdev_ops = &pch_gbe_netdev_ops;
2559 netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
2560 netif_napi_add(netdev, &adapter->napi,
2561 pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
2562 netdev->hw_features = NETIF_F_RXCSUM |
2563 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2564 netdev->features = netdev->hw_features;
2565 pch_gbe_set_ethtool_ops(netdev);
2567 /* MTU range: 46 - 10300 */
2568 netdev->min_mtu = ETH_ZLEN - ETH_HLEN;
2569 netdev->max_mtu = PCH_GBE_MAX_JUMBO_FRAME_SIZE -
2570 (ETH_HLEN + ETH_FCS_LEN);
2572 pch_gbe_mac_load_mac_addr(&adapter->hw);
2573 pch_gbe_mac_reset_hw(&adapter->hw);
2575 /* setup the private structure */
2576 ret = pch_gbe_sw_init(adapter);
2578 goto err_free_netdev;
2580 /* Initialize PHY */
2581 ret = pch_gbe_init_phy(adapter);
2583 dev_err(&pdev->dev, "PHY initialize error\n");
2584 goto err_free_adapter;
2587 /* Read the MAC address. and store to the private data */
2588 ret = pch_gbe_mac_read_mac_addr(&adapter->hw);
2590 dev_err(&pdev->dev, "MAC address Read Error\n");
2591 goto err_free_adapter;
2594 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2595 if (!is_valid_ether_addr(netdev->dev_addr)) {
2597 * If the MAC is invalid (or just missing), display a warning
2598 * but do not abort setting up the device. pch_gbe_up will
2599 * prevent the interface from being brought up until a valid MAC
2602 dev_err(&pdev->dev, "Invalid MAC address, "
2603 "interface disabled.\n");
2605 timer_setup(&adapter->watchdog_timer, pch_gbe_watchdog, 0);
2607 INIT_WORK(&adapter->reset_task, pch_gbe_reset_task);
2609 pch_gbe_check_options(adapter);
2611 /* initialize the wol settings based on the eeprom settings */
2612 adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
2613 dev_info(&pdev->dev, "MAC address : %pM\n", netdev->dev_addr);
2615 /* reset the hardware with the new settings */
2616 pch_gbe_reset(adapter);
2618 ret = register_netdev(netdev);
2620 goto err_free_adapter;
2621 /* tell the stack to leave us alone until pch_gbe_open() is called */
2622 netif_carrier_off(netdev);
2623 netif_stop_queue(netdev);
2625 dev_dbg(&pdev->dev, "PCH Network Connection\n");
2627 /* Disable hibernation on certain platforms */
2628 if (adapter->pdata && adapter->pdata->phy_disable_hibernate)
2629 pch_gbe_phy_disable_hibernate(&adapter->hw);
2631 device_set_wakeup_enable(&pdev->dev, 1);
2635 pch_gbe_phy_hw_reset(&adapter->hw);
2637 free_netdev(netdev);
2641 /* The AR803X PHY on the MinnowBoard requires a physical pin to be toggled to
2642 * ensure it is awake for probe and init. Request the line and reset the PHY.
2644 static int pch_gbe_minnow_platform_init(struct pci_dev *pdev)
2646 unsigned long flags = GPIOF_DIR_OUT | GPIOF_INIT_HIGH | GPIOF_EXPORT;
2647 unsigned gpio = MINNOW_PHY_RESET_GPIO;
2650 ret = devm_gpio_request_one(&pdev->dev, gpio, flags,
2651 "minnow_phy_reset");
2654 "ERR: Can't request PHY reset GPIO line '%d'\n", gpio);
2658 gpio_set_value(gpio, 0);
2659 usleep_range(1250, 1500);
2660 gpio_set_value(gpio, 1);
2661 usleep_range(1250, 1500);
2666 static struct pch_gbe_privdata pch_gbe_minnow_privdata = {
2667 .phy_tx_clk_delay = true,
2668 .phy_disable_hibernate = true,
2669 .platform_init = pch_gbe_minnow_platform_init,
2672 static const struct pci_device_id pch_gbe_pcidev_id[] = {
2673 {.vendor = PCI_VENDOR_ID_INTEL,
2674 .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2675 .subvendor = PCI_VENDOR_ID_CIRCUITCO,
2676 .subdevice = PCI_SUBSYSTEM_ID_CIRCUITCO_MINNOWBOARD,
2677 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2678 .class_mask = (0xFFFF00),
2679 .driver_data = (kernel_ulong_t)&pch_gbe_minnow_privdata
2681 {.vendor = PCI_VENDOR_ID_INTEL,
2682 .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2683 .subvendor = PCI_ANY_ID,
2684 .subdevice = PCI_ANY_ID,
2685 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2686 .class_mask = (0xFFFF00)
2688 {.vendor = PCI_VENDOR_ID_ROHM,
2689 .device = PCI_DEVICE_ID_ROHM_ML7223_GBE,
2690 .subvendor = PCI_ANY_ID,
2691 .subdevice = PCI_ANY_ID,
2692 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2693 .class_mask = (0xFFFF00)
2695 {.vendor = PCI_VENDOR_ID_ROHM,
2696 .device = PCI_DEVICE_ID_ROHM_ML7831_GBE,
2697 .subvendor = PCI_ANY_ID,
2698 .subdevice = PCI_ANY_ID,
2699 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2700 .class_mask = (0xFFFF00)
2702 /* required last entry */
2707 static const struct dev_pm_ops pch_gbe_pm_ops = {
2708 .suspend = pch_gbe_suspend,
2709 .resume = pch_gbe_resume,
2710 .freeze = pch_gbe_suspend,
2711 .thaw = pch_gbe_resume,
2712 .poweroff = pch_gbe_suspend,
2713 .restore = pch_gbe_resume,
2717 static const struct pci_error_handlers pch_gbe_err_handler = {
2718 .error_detected = pch_gbe_io_error_detected,
2719 .slot_reset = pch_gbe_io_slot_reset,
2720 .resume = pch_gbe_io_resume
2723 static struct pci_driver pch_gbe_driver = {
2724 .name = KBUILD_MODNAME,
2725 .id_table = pch_gbe_pcidev_id,
2726 .probe = pch_gbe_probe,
2727 .remove = pch_gbe_remove,
2729 .driver.pm = &pch_gbe_pm_ops,
2731 .shutdown = pch_gbe_shutdown,
2732 .err_handler = &pch_gbe_err_handler
2734 module_pci_driver(pch_gbe_driver);
2736 MODULE_DESCRIPTION("EG20T PCH Gigabit ethernet Driver");
2737 MODULE_AUTHOR("LAPIS SEMICONDUCTOR, <tshimizu818@gmail.com>");
2738 MODULE_LICENSE("GPL");
2739 MODULE_VERSION(DRV_VERSION);
2740 MODULE_DEVICE_TABLE(pci, pch_gbe_pcidev_id);
2742 /* pch_gbe_main.c */