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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22 #include "pch_gbe_api.h"
23 #include <linux/module.h>
25 #include <linux/net_tstamp.h>
26 #include <linux/ptp_classify.h>
29 #define DRV_VERSION "1.01"
30 const char pch_driver_version[] = DRV_VERSION;
32 #define PCI_DEVICE_ID_INTEL_IOH1_GBE 0x8802 /* Pci device ID */
33 #define PCH_GBE_MAR_ENTRIES 16
34 #define PCH_GBE_SHORT_PKT 64
35 #define DSC_INIT16 0xC000
36 #define PCH_GBE_DMA_ALIGN 0
37 #define PCH_GBE_DMA_PADDING 2
38 #define PCH_GBE_WATCHDOG_PERIOD (5 * HZ) /* watchdog time */
39 #define PCH_GBE_COPYBREAK_DEFAULT 256
40 #define PCH_GBE_PCI_BAR 1
41 #define PCH_GBE_RESERVE_MEMORY 0x200000 /* 2MB */
43 /* Macros for ML7223 */
44 #define PCI_VENDOR_ID_ROHM 0x10db
45 #define PCI_DEVICE_ID_ROHM_ML7223_GBE 0x8013
47 /* Macros for ML7831 */
48 #define PCI_DEVICE_ID_ROHM_ML7831_GBE 0x8802
50 #define PCH_GBE_TX_WEIGHT 64
51 #define PCH_GBE_RX_WEIGHT 64
52 #define PCH_GBE_RX_BUFFER_WRITE 16
54 /* Initialize the wake-on-LAN settings */
55 #define PCH_GBE_WL_INIT_SETTING (PCH_GBE_WLC_MP)
57 #define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
58 PCH_GBE_CHIP_TYPE_INTERNAL | \
59 PCH_GBE_RGMII_MODE_RGMII \
62 /* Ethertype field values */
63 #define PCH_GBE_MAX_RX_BUFFER_SIZE 0x2880
64 #define PCH_GBE_MAX_JUMBO_FRAME_SIZE 10318
65 #define PCH_GBE_FRAME_SIZE_2048 2048
66 #define PCH_GBE_FRAME_SIZE_4096 4096
67 #define PCH_GBE_FRAME_SIZE_8192 8192
69 #define PCH_GBE_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
70 #define PCH_GBE_RX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_rx_desc)
71 #define PCH_GBE_TX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_tx_desc)
72 #define PCH_GBE_DESC_UNUSED(R) \
73 ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
74 (R)->next_to_clean - (R)->next_to_use - 1)
76 /* Pause packet value */
77 #define PCH_GBE_PAUSE_PKT1_VALUE 0x00C28001
78 #define PCH_GBE_PAUSE_PKT2_VALUE 0x00000100
79 #define PCH_GBE_PAUSE_PKT4_VALUE 0x01000888
80 #define PCH_GBE_PAUSE_PKT5_VALUE 0x0000FFFF
83 /* This defines the bits that are set in the Interrupt Mask
84 * Set/Read Register. Each bit is documented below:
85 * o RXT0 = Receiver Timer Interrupt (ring 0)
86 * o TXDW = Transmit Descriptor Written Back
87 * o RXDMT0 = Receive Descriptor Minimum Threshold hit (ring 0)
88 * o RXSEQ = Receive Sequence Error
89 * o LSC = Link Status Change
91 #define PCH_GBE_INT_ENABLE_MASK ( \
92 PCH_GBE_INT_RX_DMA_CMPLT | \
93 PCH_GBE_INT_RX_DSC_EMP | \
94 PCH_GBE_INT_RX_FIFO_ERR | \
95 PCH_GBE_INT_WOL_DET | \
96 PCH_GBE_INT_TX_CMPLT \
99 #define PCH_GBE_INT_DISABLE_ALL 0
101 #ifdef CONFIG_PCH_PTP
102 /* Macros for ieee1588 */
103 /* 0x40 Time Synchronization Channel Control Register Bits */
104 #define MASTER_MODE (1<<0)
105 #define SLAVE_MODE (0)
106 #define V2_MODE (1<<31)
107 #define CAP_MODE0 (0)
108 #define CAP_MODE2 (1<<17)
110 /* 0x44 Time Synchronization Channel Event Register Bits */
111 #define TX_SNAPSHOT_LOCKED (1<<0)
112 #define RX_SNAPSHOT_LOCKED (1<<1)
114 #define PTP_L4_MULTICAST_SA "01:00:5e:00:01:81"
115 #define PTP_L2_MULTICAST_SA "01:1b:19:00:00:00"
118 static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
120 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
121 static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
123 static void pch_gbe_set_multi(struct net_device *netdev);
125 #ifdef CONFIG_PCH_PTP
126 static struct sock_filter ptp_filter[] = {
130 static int pch_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
132 u8 *data = skb->data;
137 if (sk_run_filter(skb, ptp_filter) == PTP_CLASS_NONE)
140 offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
142 if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid))
145 hi = (u16 *)(data + offset + OFF_PTP_SOURCE_UUID);
146 id = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
148 memcpy(&lo, &hi[1], sizeof(lo));
150 return (uid_hi == *hi &&
156 pch_rx_timestamp(struct pch_gbe_adapter *adapter, struct sk_buff *skb)
158 struct skb_shared_hwtstamps *shhwtstamps;
159 struct pci_dev *pdev;
164 if (!adapter->hwts_rx_en)
167 /* Get ieee1588's dev information */
168 pdev = adapter->ptp_pdev;
170 val = pch_ch_event_read(pdev);
172 if (!(val & RX_SNAPSHOT_LOCKED))
175 lo = pch_src_uuid_lo_read(pdev);
176 hi = pch_src_uuid_hi_read(pdev);
179 seq = (hi >> 16) & 0xffff;
181 if (!pch_ptp_match(skb, htons(uid), htonl(lo), htons(seq)))
184 ns = pch_rx_snap_read(pdev);
186 shhwtstamps = skb_hwtstamps(skb);
187 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
188 shhwtstamps->hwtstamp = ns_to_ktime(ns);
190 pch_ch_event_write(pdev, RX_SNAPSHOT_LOCKED);
194 pch_tx_timestamp(struct pch_gbe_adapter *adapter, struct sk_buff *skb)
196 struct skb_shared_hwtstamps shhwtstamps;
197 struct pci_dev *pdev;
198 struct skb_shared_info *shtx;
202 shtx = skb_shinfo(skb);
203 if (likely(!(shtx->tx_flags & SKBTX_HW_TSTAMP && adapter->hwts_tx_en)))
206 shtx->tx_flags |= SKBTX_IN_PROGRESS;
208 /* Get ieee1588's dev information */
209 pdev = adapter->ptp_pdev;
212 * This really stinks, but we have to poll for the Tx time stamp.
214 for (cnt = 0; cnt < 100; cnt++) {
215 val = pch_ch_event_read(pdev);
216 if (val & TX_SNAPSHOT_LOCKED)
220 if (!(val & TX_SNAPSHOT_LOCKED)) {
221 shtx->tx_flags &= ~SKBTX_IN_PROGRESS;
225 ns = pch_tx_snap_read(pdev);
227 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
228 shhwtstamps.hwtstamp = ns_to_ktime(ns);
229 skb_tstamp_tx(skb, &shhwtstamps);
231 pch_ch_event_write(pdev, TX_SNAPSHOT_LOCKED);
234 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
236 struct hwtstamp_config cfg;
237 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
238 struct pci_dev *pdev;
241 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
244 if (cfg.flags) /* reserved for future extensions */
247 /* Get ieee1588's dev information */
248 pdev = adapter->ptp_pdev;
250 switch (cfg.tx_type) {
251 case HWTSTAMP_TX_OFF:
252 adapter->hwts_tx_en = 0;
255 adapter->hwts_tx_en = 1;
261 switch (cfg.rx_filter) {
262 case HWTSTAMP_FILTER_NONE:
263 adapter->hwts_rx_en = 0;
265 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
266 adapter->hwts_rx_en = 0;
267 pch_ch_control_write(pdev, SLAVE_MODE | CAP_MODE0);
269 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
270 adapter->hwts_rx_en = 1;
271 pch_ch_control_write(pdev, MASTER_MODE | CAP_MODE0);
273 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
274 adapter->hwts_rx_en = 1;
275 pch_ch_control_write(pdev, V2_MODE | CAP_MODE2);
276 strcpy(station, PTP_L4_MULTICAST_SA);
277 pch_set_station_address(station, pdev);
279 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
280 adapter->hwts_rx_en = 1;
281 pch_ch_control_write(pdev, V2_MODE | CAP_MODE2);
282 strcpy(station, PTP_L2_MULTICAST_SA);
283 pch_set_station_address(station, pdev);
289 /* Clear out any old time stamps. */
290 pch_ch_event_write(pdev, TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED);
292 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
296 inline void pch_gbe_mac_load_mac_addr(struct pch_gbe_hw *hw)
298 iowrite32(0x01, &hw->reg->MAC_ADDR_LOAD);
302 * pch_gbe_mac_read_mac_addr - Read MAC address
303 * @hw: Pointer to the HW structure
307 s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
311 adr1a = ioread32(&hw->reg->mac_adr[0].high);
312 adr1b = ioread32(&hw->reg->mac_adr[0].low);
314 hw->mac.addr[0] = (u8)(adr1a & 0xFF);
315 hw->mac.addr[1] = (u8)((adr1a >> 8) & 0xFF);
316 hw->mac.addr[2] = (u8)((adr1a >> 16) & 0xFF);
317 hw->mac.addr[3] = (u8)((adr1a >> 24) & 0xFF);
318 hw->mac.addr[4] = (u8)(adr1b & 0xFF);
319 hw->mac.addr[5] = (u8)((adr1b >> 8) & 0xFF);
321 pr_debug("hw->mac.addr : %pM\n", hw->mac.addr);
326 * pch_gbe_wait_clr_bit - Wait to clear a bit
327 * @reg: Pointer of register
330 static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
335 while ((ioread32(reg) & bit) && --tmp)
338 pr_err("Error: busy bit is not cleared\n");
342 * pch_gbe_wait_clr_bit_irq - Wait to clear a bit for interrupt context
343 * @reg: Pointer of register
346 static int pch_gbe_wait_clr_bit_irq(void *reg, u32 bit)
352 while ((ioread32(reg) & bit) && --tmp)
355 pr_err("Error: busy bit is not cleared\n");
362 * pch_gbe_mac_mar_set - Set MAC address register
363 * @hw: Pointer to the HW structure
364 * @addr: Pointer to the MAC address
365 * @index: MAC address array register
367 static void pch_gbe_mac_mar_set(struct pch_gbe_hw *hw, u8 * addr, u32 index)
369 u32 mar_low, mar_high, adrmask;
371 pr_debug("index : 0x%x\n", index);
374 * HW expects these in little endian so we reverse the byte order
375 * from network order (big endian) to little endian
377 mar_high = ((u32) addr[0] | ((u32) addr[1] << 8) |
378 ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
379 mar_low = ((u32) addr[4] | ((u32) addr[5] << 8));
380 /* Stop the MAC Address of index. */
381 adrmask = ioread32(&hw->reg->ADDR_MASK);
382 iowrite32((adrmask | (0x0001 << index)), &hw->reg->ADDR_MASK);
384 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
385 /* Set the MAC address to the MAC address 1A/1B register */
386 iowrite32(mar_high, &hw->reg->mac_adr[index].high);
387 iowrite32(mar_low, &hw->reg->mac_adr[index].low);
388 /* Start the MAC address of index */
389 iowrite32((adrmask & ~(0x0001 << index)), &hw->reg->ADDR_MASK);
391 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
395 * pch_gbe_mac_reset_hw - Reset hardware
396 * @hw: Pointer to the HW structure
398 static void pch_gbe_mac_reset_hw(struct pch_gbe_hw *hw)
400 /* Read the MAC address. and store to the private data */
401 pch_gbe_mac_read_mac_addr(hw);
402 iowrite32(PCH_GBE_ALL_RST, &hw->reg->RESET);
403 #ifdef PCH_GBE_MAC_IFOP_RGMII
404 iowrite32(PCH_GBE_MODE_GMII_ETHER, &hw->reg->MODE);
406 pch_gbe_wait_clr_bit(&hw->reg->RESET, PCH_GBE_ALL_RST);
407 /* Setup the receive addresses */
408 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
412 static void pch_gbe_mac_reset_rx(struct pch_gbe_hw *hw)
414 /* Read the MAC addresses. and store to the private data */
415 pch_gbe_mac_read_mac_addr(hw);
416 iowrite32(PCH_GBE_RX_RST, &hw->reg->RESET);
417 pch_gbe_wait_clr_bit_irq(&hw->reg->RESET, PCH_GBE_RX_RST);
418 /* Setup the MAC addresses */
419 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
424 * pch_gbe_mac_init_rx_addrs - Initialize receive address's
425 * @hw: Pointer to the HW structure
426 * @mar_count: Receive address registers
428 static void pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw *hw, u16 mar_count)
432 /* Setup the receive address */
433 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
435 /* Zero out the other receive addresses */
436 for (i = 1; i < mar_count; i++) {
437 iowrite32(0, &hw->reg->mac_adr[i].high);
438 iowrite32(0, &hw->reg->mac_adr[i].low);
440 iowrite32(0xFFFE, &hw->reg->ADDR_MASK);
442 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
447 * pch_gbe_mac_mc_addr_list_update - Update Multicast addresses
448 * @hw: Pointer to the HW structure
449 * @mc_addr_list: Array of multicast addresses to program
450 * @mc_addr_count: Number of multicast addresses to program
451 * @mar_used_count: The first MAC Address register free to program
452 * @mar_total_num: Total number of supported MAC Address Registers
454 static void pch_gbe_mac_mc_addr_list_update(struct pch_gbe_hw *hw,
455 u8 *mc_addr_list, u32 mc_addr_count,
456 u32 mar_used_count, u32 mar_total_num)
460 /* Load the first set of multicast addresses into the exact
461 * filters (RAR). If there are not enough to fill the RAR
462 * array, clear the filters.
464 for (i = mar_used_count; i < mar_total_num; i++) {
466 pch_gbe_mac_mar_set(hw, mc_addr_list, i);
468 mc_addr_list += ETH_ALEN;
470 /* Clear MAC address mask */
471 adrmask = ioread32(&hw->reg->ADDR_MASK);
472 iowrite32((adrmask | (0x0001 << i)),
473 &hw->reg->ADDR_MASK);
475 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
476 /* Clear MAC address */
477 iowrite32(0, &hw->reg->mac_adr[i].high);
478 iowrite32(0, &hw->reg->mac_adr[i].low);
484 * pch_gbe_mac_force_mac_fc - Force the MAC's flow control settings
485 * @hw: Pointer to the HW structure
488 * Negative value: Failed.
490 s32 pch_gbe_mac_force_mac_fc(struct pch_gbe_hw *hw)
492 struct pch_gbe_mac_info *mac = &hw->mac;
495 pr_debug("mac->fc = %u\n", mac->fc);
497 rx_fctrl = ioread32(&hw->reg->RX_FCTRL);
500 case PCH_GBE_FC_NONE:
501 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
502 mac->tx_fc_enable = false;
504 case PCH_GBE_FC_RX_PAUSE:
505 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
506 mac->tx_fc_enable = false;
508 case PCH_GBE_FC_TX_PAUSE:
509 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
510 mac->tx_fc_enable = true;
512 case PCH_GBE_FC_FULL:
513 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
514 mac->tx_fc_enable = true;
517 pr_err("Flow control param set incorrectly\n");
520 if (mac->link_duplex == DUPLEX_HALF)
521 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
522 iowrite32(rx_fctrl, &hw->reg->RX_FCTRL);
523 pr_debug("RX_FCTRL reg : 0x%08x mac->tx_fc_enable : %d\n",
524 ioread32(&hw->reg->RX_FCTRL), mac->tx_fc_enable);
529 * pch_gbe_mac_set_wol_event - Set wake-on-lan event
530 * @hw: Pointer to the HW structure
531 * @wu_evt: Wake up event
533 static void pch_gbe_mac_set_wol_event(struct pch_gbe_hw *hw, u32 wu_evt)
537 pr_debug("wu_evt : 0x%08x ADDR_MASK reg : 0x%08x\n",
538 wu_evt, ioread32(&hw->reg->ADDR_MASK));
541 /* Set Wake-On-Lan address mask */
542 addr_mask = ioread32(&hw->reg->ADDR_MASK);
543 iowrite32(addr_mask, &hw->reg->WOL_ADDR_MASK);
545 pch_gbe_wait_clr_bit(&hw->reg->WOL_ADDR_MASK, PCH_GBE_WLA_BUSY);
546 iowrite32(0, &hw->reg->WOL_ST);
547 iowrite32((wu_evt | PCH_GBE_WLC_WOL_MODE), &hw->reg->WOL_CTRL);
548 iowrite32(0x02, &hw->reg->TCPIP_ACC);
549 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
551 iowrite32(0, &hw->reg->WOL_CTRL);
552 iowrite32(0, &hw->reg->WOL_ST);
558 * pch_gbe_mac_ctrl_miim - Control MIIM interface
559 * @hw: Pointer to the HW structure
560 * @addr: Address of PHY
561 * @dir: Operetion. (Write or Read)
562 * @reg: Access register of PHY
565 * Returns: Read date.
567 u16 pch_gbe_mac_ctrl_miim(struct pch_gbe_hw *hw, u32 addr, u32 dir, u32 reg,
574 spin_lock_irqsave(&hw->miim_lock, flags);
576 for (i = 100; i; --i) {
577 if ((ioread32(&hw->reg->MIIM) & PCH_GBE_MIIM_OPER_READY))
582 pr_err("pch-gbe.miim won't go Ready\n");
583 spin_unlock_irqrestore(&hw->miim_lock, flags);
584 return 0; /* No way to indicate timeout error */
586 iowrite32(((reg << PCH_GBE_MIIM_REG_ADDR_SHIFT) |
587 (addr << PCH_GBE_MIIM_PHY_ADDR_SHIFT) |
588 dir | data), &hw->reg->MIIM);
589 for (i = 0; i < 100; i++) {
591 data_out = ioread32(&hw->reg->MIIM);
592 if ((data_out & PCH_GBE_MIIM_OPER_READY))
595 spin_unlock_irqrestore(&hw->miim_lock, flags);
597 pr_debug("PHY %s: reg=%d, data=0x%04X\n",
598 dir == PCH_GBE_MIIM_OPER_READ ? "READ" : "WRITE", reg,
599 dir == PCH_GBE_MIIM_OPER_READ ? data_out : data);
600 return (u16) data_out;
604 * pch_gbe_mac_set_pause_packet - Set pause packet
605 * @hw: Pointer to the HW structure
607 static void pch_gbe_mac_set_pause_packet(struct pch_gbe_hw *hw)
609 unsigned long tmp2, tmp3;
611 /* Set Pause packet */
612 tmp2 = hw->mac.addr[1];
613 tmp2 = (tmp2 << 8) | hw->mac.addr[0];
614 tmp2 = PCH_GBE_PAUSE_PKT2_VALUE | (tmp2 << 16);
616 tmp3 = hw->mac.addr[5];
617 tmp3 = (tmp3 << 8) | hw->mac.addr[4];
618 tmp3 = (tmp3 << 8) | hw->mac.addr[3];
619 tmp3 = (tmp3 << 8) | hw->mac.addr[2];
621 iowrite32(PCH_GBE_PAUSE_PKT1_VALUE, &hw->reg->PAUSE_PKT1);
622 iowrite32(tmp2, &hw->reg->PAUSE_PKT2);
623 iowrite32(tmp3, &hw->reg->PAUSE_PKT3);
624 iowrite32(PCH_GBE_PAUSE_PKT4_VALUE, &hw->reg->PAUSE_PKT4);
625 iowrite32(PCH_GBE_PAUSE_PKT5_VALUE, &hw->reg->PAUSE_PKT5);
627 /* Transmit Pause Packet */
628 iowrite32(PCH_GBE_PS_PKT_RQ, &hw->reg->PAUSE_REQ);
630 pr_debug("PAUSE_PKT1-5 reg : 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
631 ioread32(&hw->reg->PAUSE_PKT1), ioread32(&hw->reg->PAUSE_PKT2),
632 ioread32(&hw->reg->PAUSE_PKT3), ioread32(&hw->reg->PAUSE_PKT4),
633 ioread32(&hw->reg->PAUSE_PKT5));
640 * pch_gbe_alloc_queues - Allocate memory for all rings
641 * @adapter: Board private structure to initialize
644 * Negative value: Failed
646 static int pch_gbe_alloc_queues(struct pch_gbe_adapter *adapter)
648 adapter->tx_ring = kzalloc(sizeof(*adapter->tx_ring), GFP_KERNEL);
649 if (!adapter->tx_ring)
652 adapter->rx_ring = kzalloc(sizeof(*adapter->rx_ring), GFP_KERNEL);
653 if (!adapter->rx_ring) {
654 kfree(adapter->tx_ring);
661 * pch_gbe_init_stats - Initialize status
662 * @adapter: Board private structure to initialize
664 static void pch_gbe_init_stats(struct pch_gbe_adapter *adapter)
666 memset(&adapter->stats, 0, sizeof(adapter->stats));
671 * pch_gbe_init_phy - Initialize PHY
672 * @adapter: Board private structure to initialize
675 * Negative value: Failed
677 static int pch_gbe_init_phy(struct pch_gbe_adapter *adapter)
679 struct net_device *netdev = adapter->netdev;
683 /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
684 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
685 adapter->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
686 bmcr = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMCR);
687 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
688 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
689 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
692 adapter->hw.phy.addr = adapter->mii.phy_id;
693 pr_debug("phy_addr = %d\n", adapter->mii.phy_id);
696 /* Selected the phy and isolate the rest */
697 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
698 if (addr != adapter->mii.phy_id) {
699 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
702 bmcr = pch_gbe_mdio_read(netdev, addr, MII_BMCR);
703 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
704 bmcr & ~BMCR_ISOLATE);
709 adapter->mii.phy_id_mask = 0x1F;
710 adapter->mii.reg_num_mask = 0x1F;
711 adapter->mii.dev = adapter->netdev;
712 adapter->mii.mdio_read = pch_gbe_mdio_read;
713 adapter->mii.mdio_write = pch_gbe_mdio_write;
714 adapter->mii.supports_gmii = mii_check_gmii_support(&adapter->mii);
719 * pch_gbe_mdio_read - The read function for mii
720 * @netdev: Network interface device structure
722 * @reg: Access location
725 * Negative value: Failed
727 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg)
729 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
730 struct pch_gbe_hw *hw = &adapter->hw;
732 return pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_READ, reg,
737 * pch_gbe_mdio_write - The write function for mii
738 * @netdev: Network interface device structure
739 * @addr: Phy ID (not used)
740 * @reg: Access location
743 static void pch_gbe_mdio_write(struct net_device *netdev,
744 int addr, int reg, int data)
746 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
747 struct pch_gbe_hw *hw = &adapter->hw;
749 pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_WRITE, reg, data);
753 * pch_gbe_reset_task - Reset processing at the time of transmission timeout
754 * @work: Pointer of board private structure
756 static void pch_gbe_reset_task(struct work_struct *work)
758 struct pch_gbe_adapter *adapter;
759 adapter = container_of(work, struct pch_gbe_adapter, reset_task);
762 pch_gbe_reinit_locked(adapter);
767 * pch_gbe_reinit_locked- Re-initialization
768 * @adapter: Board private structure
770 void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
772 pch_gbe_down(adapter);
777 * pch_gbe_reset - Reset GbE
778 * @adapter: Board private structure
780 void pch_gbe_reset(struct pch_gbe_adapter *adapter)
782 pch_gbe_mac_reset_hw(&adapter->hw);
783 /* reprogram multicast address register after reset */
784 pch_gbe_set_multi(adapter->netdev);
785 /* Setup the receive address. */
786 pch_gbe_mac_init_rx_addrs(&adapter->hw, PCH_GBE_MAR_ENTRIES);
787 if (pch_gbe_hal_init_hw(&adapter->hw))
788 pr_err("Hardware Error\n");
792 * pch_gbe_free_irq - Free an interrupt
793 * @adapter: Board private structure
795 static void pch_gbe_free_irq(struct pch_gbe_adapter *adapter)
797 struct net_device *netdev = adapter->netdev;
799 free_irq(adapter->pdev->irq, netdev);
800 if (adapter->have_msi) {
801 pci_disable_msi(adapter->pdev);
802 pr_debug("call pci_disable_msi\n");
807 * pch_gbe_irq_disable - Mask off interrupt generation on the NIC
808 * @adapter: Board private structure
810 static void pch_gbe_irq_disable(struct pch_gbe_adapter *adapter)
812 struct pch_gbe_hw *hw = &adapter->hw;
814 atomic_inc(&adapter->irq_sem);
815 iowrite32(0, &hw->reg->INT_EN);
816 ioread32(&hw->reg->INT_ST);
817 synchronize_irq(adapter->pdev->irq);
819 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
823 * pch_gbe_irq_enable - Enable default interrupt generation settings
824 * @adapter: Board private structure
826 static void pch_gbe_irq_enable(struct pch_gbe_adapter *adapter)
828 struct pch_gbe_hw *hw = &adapter->hw;
830 if (likely(atomic_dec_and_test(&adapter->irq_sem)))
831 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
832 ioread32(&hw->reg->INT_ST);
833 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
839 * pch_gbe_setup_tctl - configure the Transmit control registers
840 * @adapter: Board private structure
842 static void pch_gbe_setup_tctl(struct pch_gbe_adapter *adapter)
844 struct pch_gbe_hw *hw = &adapter->hw;
847 tx_mode = PCH_GBE_TM_LONG_PKT |
848 PCH_GBE_TM_ST_AND_FD |
849 PCH_GBE_TM_SHORT_PKT |
850 PCH_GBE_TM_TH_TX_STRT_8 |
851 PCH_GBE_TM_TH_ALM_EMP_4 | PCH_GBE_TM_TH_ALM_FULL_8;
853 iowrite32(tx_mode, &hw->reg->TX_MODE);
855 tcpip = ioread32(&hw->reg->TCPIP_ACC);
856 tcpip |= PCH_GBE_TX_TCPIPACC_EN;
857 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
862 * pch_gbe_configure_tx - Configure Transmit Unit after Reset
863 * @adapter: Board private structure
865 static void pch_gbe_configure_tx(struct pch_gbe_adapter *adapter)
867 struct pch_gbe_hw *hw = &adapter->hw;
868 u32 tdba, tdlen, dctrl;
870 pr_debug("dma addr = 0x%08llx size = 0x%08x\n",
871 (unsigned long long)adapter->tx_ring->dma,
872 adapter->tx_ring->size);
874 /* Setup the HW Tx Head and Tail descriptor pointers */
875 tdba = adapter->tx_ring->dma;
876 tdlen = adapter->tx_ring->size - 0x10;
877 iowrite32(tdba, &hw->reg->TX_DSC_BASE);
878 iowrite32(tdlen, &hw->reg->TX_DSC_SIZE);
879 iowrite32(tdba, &hw->reg->TX_DSC_SW_P);
881 /* Enables Transmission DMA */
882 dctrl = ioread32(&hw->reg->DMA_CTRL);
883 dctrl |= PCH_GBE_TX_DMA_EN;
884 iowrite32(dctrl, &hw->reg->DMA_CTRL);
888 * pch_gbe_setup_rctl - Configure the receive control registers
889 * @adapter: Board private structure
891 static void pch_gbe_setup_rctl(struct pch_gbe_adapter *adapter)
893 struct pch_gbe_hw *hw = &adapter->hw;
896 rx_mode = PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN |
897 PCH_GBE_RH_ALM_EMP_4 | PCH_GBE_RH_ALM_FULL_4 | PCH_GBE_RH_RD_TRG_8;
899 iowrite32(rx_mode, &hw->reg->RX_MODE);
901 tcpip = ioread32(&hw->reg->TCPIP_ACC);
903 tcpip |= PCH_GBE_RX_TCPIPACC_OFF;
904 tcpip &= ~PCH_GBE_RX_TCPIPACC_EN;
905 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
910 * pch_gbe_configure_rx - Configure Receive Unit after Reset
911 * @adapter: Board private structure
913 static void pch_gbe_configure_rx(struct pch_gbe_adapter *adapter)
915 struct pch_gbe_hw *hw = &adapter->hw;
916 u32 rdba, rdlen, rctl, rxdma;
918 pr_debug("dma adr = 0x%08llx size = 0x%08x\n",
919 (unsigned long long)adapter->rx_ring->dma,
920 adapter->rx_ring->size);
922 pch_gbe_mac_force_mac_fc(hw);
924 /* Disables Receive MAC */
925 rctl = ioread32(&hw->reg->MAC_RX_EN);
926 iowrite32((rctl & ~PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
928 /* Disables Receive DMA */
929 rxdma = ioread32(&hw->reg->DMA_CTRL);
930 rxdma &= ~PCH_GBE_RX_DMA_EN;
931 iowrite32(rxdma, &hw->reg->DMA_CTRL);
933 pr_debug("MAC_RX_EN reg = 0x%08x DMA_CTRL reg = 0x%08x\n",
934 ioread32(&hw->reg->MAC_RX_EN),
935 ioread32(&hw->reg->DMA_CTRL));
937 /* Setup the HW Rx Head and Tail Descriptor Pointers and
938 * the Base and Length of the Rx Descriptor Ring */
939 rdba = adapter->rx_ring->dma;
940 rdlen = adapter->rx_ring->size - 0x10;
941 iowrite32(rdba, &hw->reg->RX_DSC_BASE);
942 iowrite32(rdlen, &hw->reg->RX_DSC_SIZE);
943 iowrite32((rdba + rdlen), &hw->reg->RX_DSC_SW_P);
947 * pch_gbe_unmap_and_free_tx_resource - Unmap and free tx socket buffer
948 * @adapter: Board private structure
949 * @buffer_info: Buffer information structure
951 static void pch_gbe_unmap_and_free_tx_resource(
952 struct pch_gbe_adapter *adapter, struct pch_gbe_buffer *buffer_info)
954 if (buffer_info->mapped) {
955 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
956 buffer_info->length, DMA_TO_DEVICE);
957 buffer_info->mapped = false;
959 if (buffer_info->skb) {
960 dev_kfree_skb_any(buffer_info->skb);
961 buffer_info->skb = NULL;
966 * pch_gbe_unmap_and_free_rx_resource - Unmap and free rx socket buffer
967 * @adapter: Board private structure
968 * @buffer_info: Buffer information structure
970 static void pch_gbe_unmap_and_free_rx_resource(
971 struct pch_gbe_adapter *adapter,
972 struct pch_gbe_buffer *buffer_info)
974 if (buffer_info->mapped) {
975 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
976 buffer_info->length, DMA_FROM_DEVICE);
977 buffer_info->mapped = false;
979 if (buffer_info->skb) {
980 dev_kfree_skb_any(buffer_info->skb);
981 buffer_info->skb = NULL;
986 * pch_gbe_clean_tx_ring - Free Tx Buffers
987 * @adapter: Board private structure
988 * @tx_ring: Ring to be cleaned
990 static void pch_gbe_clean_tx_ring(struct pch_gbe_adapter *adapter,
991 struct pch_gbe_tx_ring *tx_ring)
993 struct pch_gbe_hw *hw = &adapter->hw;
994 struct pch_gbe_buffer *buffer_info;
998 /* Free all the Tx ring sk_buffs */
999 for (i = 0; i < tx_ring->count; i++) {
1000 buffer_info = &tx_ring->buffer_info[i];
1001 pch_gbe_unmap_and_free_tx_resource(adapter, buffer_info);
1003 pr_debug("call pch_gbe_unmap_and_free_tx_resource() %d count\n", i);
1005 size = (unsigned long)sizeof(struct pch_gbe_buffer) * tx_ring->count;
1006 memset(tx_ring->buffer_info, 0, size);
1008 /* Zero out the descriptor ring */
1009 memset(tx_ring->desc, 0, tx_ring->size);
1010 tx_ring->next_to_use = 0;
1011 tx_ring->next_to_clean = 0;
1012 iowrite32(tx_ring->dma, &hw->reg->TX_DSC_HW_P);
1013 iowrite32((tx_ring->size - 0x10), &hw->reg->TX_DSC_SIZE);
1017 * pch_gbe_clean_rx_ring - Free Rx Buffers
1018 * @adapter: Board private structure
1019 * @rx_ring: Ring to free buffers from
1022 pch_gbe_clean_rx_ring(struct pch_gbe_adapter *adapter,
1023 struct pch_gbe_rx_ring *rx_ring)
1025 struct pch_gbe_hw *hw = &adapter->hw;
1026 struct pch_gbe_buffer *buffer_info;
1030 /* Free all the Rx ring sk_buffs */
1031 for (i = 0; i < rx_ring->count; i++) {
1032 buffer_info = &rx_ring->buffer_info[i];
1033 pch_gbe_unmap_and_free_rx_resource(adapter, buffer_info);
1035 pr_debug("call pch_gbe_unmap_and_free_rx_resource() %d count\n", i);
1036 size = (unsigned long)sizeof(struct pch_gbe_buffer) * rx_ring->count;
1037 memset(rx_ring->buffer_info, 0, size);
1039 /* Zero out the descriptor ring */
1040 memset(rx_ring->desc, 0, rx_ring->size);
1041 rx_ring->next_to_clean = 0;
1042 rx_ring->next_to_use = 0;
1043 iowrite32(rx_ring->dma, &hw->reg->RX_DSC_HW_P);
1044 iowrite32((rx_ring->size - 0x10), &hw->reg->RX_DSC_SIZE);
1047 static void pch_gbe_set_rgmii_ctrl(struct pch_gbe_adapter *adapter, u16 speed,
1050 struct pch_gbe_hw *hw = &adapter->hw;
1051 unsigned long rgmii = 0;
1053 /* Set the RGMII control. */
1054 #ifdef PCH_GBE_MAC_IFOP_RGMII
1057 rgmii = (PCH_GBE_RGMII_RATE_2_5M |
1058 PCH_GBE_MAC_RGMII_CTRL_SETTING);
1061 rgmii = (PCH_GBE_RGMII_RATE_25M |
1062 PCH_GBE_MAC_RGMII_CTRL_SETTING);
1065 rgmii = (PCH_GBE_RGMII_RATE_125M |
1066 PCH_GBE_MAC_RGMII_CTRL_SETTING);
1069 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
1072 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
1075 static void pch_gbe_set_mode(struct pch_gbe_adapter *adapter, u16 speed,
1078 struct net_device *netdev = adapter->netdev;
1079 struct pch_gbe_hw *hw = &adapter->hw;
1080 unsigned long mode = 0;
1082 /* Set the communication mode */
1085 mode = PCH_GBE_MODE_MII_ETHER;
1086 netdev->tx_queue_len = 10;
1089 mode = PCH_GBE_MODE_MII_ETHER;
1090 netdev->tx_queue_len = 100;
1093 mode = PCH_GBE_MODE_GMII_ETHER;
1096 if (duplex == DUPLEX_FULL)
1097 mode |= PCH_GBE_MODE_FULL_DUPLEX;
1099 mode |= PCH_GBE_MODE_HALF_DUPLEX;
1100 iowrite32(mode, &hw->reg->MODE);
1104 * pch_gbe_watchdog - Watchdog process
1105 * @data: Board private structure
1107 static void pch_gbe_watchdog(unsigned long data)
1109 struct pch_gbe_adapter *adapter = (struct pch_gbe_adapter *)data;
1110 struct net_device *netdev = adapter->netdev;
1111 struct pch_gbe_hw *hw = &adapter->hw;
1113 pr_debug("right now = %ld\n", jiffies);
1115 pch_gbe_update_stats(adapter);
1116 if ((mii_link_ok(&adapter->mii)) && (!netif_carrier_ok(netdev))) {
1117 struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
1118 netdev->tx_queue_len = adapter->tx_queue_len;
1119 /* mii library handles link maintenance tasks */
1120 if (mii_ethtool_gset(&adapter->mii, &cmd)) {
1121 pr_err("ethtool get setting Error\n");
1122 mod_timer(&adapter->watchdog_timer,
1123 round_jiffies(jiffies +
1124 PCH_GBE_WATCHDOG_PERIOD));
1127 hw->mac.link_speed = ethtool_cmd_speed(&cmd);
1128 hw->mac.link_duplex = cmd.duplex;
1129 /* Set the RGMII control. */
1130 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
1131 hw->mac.link_duplex);
1132 /* Set the communication mode */
1133 pch_gbe_set_mode(adapter, hw->mac.link_speed,
1134 hw->mac.link_duplex);
1136 "Link is Up %d Mbps %s-Duplex\n",
1138 cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
1139 netif_carrier_on(netdev);
1140 netif_wake_queue(netdev);
1141 } else if ((!mii_link_ok(&adapter->mii)) &&
1142 (netif_carrier_ok(netdev))) {
1143 netdev_dbg(netdev, "NIC Link is Down\n");
1144 hw->mac.link_speed = SPEED_10;
1145 hw->mac.link_duplex = DUPLEX_HALF;
1146 netif_carrier_off(netdev);
1147 netif_stop_queue(netdev);
1149 mod_timer(&adapter->watchdog_timer,
1150 round_jiffies(jiffies + PCH_GBE_WATCHDOG_PERIOD));
1154 * pch_gbe_tx_queue - Carry out queuing of the transmission data
1155 * @adapter: Board private structure
1156 * @tx_ring: Tx descriptor ring structure
1157 * @skb: Sockt buffer structure
1159 static void pch_gbe_tx_queue(struct pch_gbe_adapter *adapter,
1160 struct pch_gbe_tx_ring *tx_ring,
1161 struct sk_buff *skb)
1163 struct pch_gbe_hw *hw = &adapter->hw;
1164 struct pch_gbe_tx_desc *tx_desc;
1165 struct pch_gbe_buffer *buffer_info;
1166 struct sk_buff *tmp_skb;
1167 unsigned int frame_ctrl;
1168 unsigned int ring_num;
1170 /*-- Set frame control --*/
1172 if (unlikely(skb->len < PCH_GBE_SHORT_PKT))
1173 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD;
1174 if (skb->ip_summed == CHECKSUM_NONE)
1175 frame_ctrl |= PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
1177 /* Performs checksum processing */
1179 * It is because the hardware accelerator does not support a checksum,
1180 * when the received data size is less than 64 bytes.
1182 if (skb->len < PCH_GBE_SHORT_PKT && skb->ip_summed != CHECKSUM_NONE) {
1183 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD |
1184 PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
1185 if (skb->protocol == htons(ETH_P_IP)) {
1186 struct iphdr *iph = ip_hdr(skb);
1187 unsigned int offset;
1188 offset = skb_transport_offset(skb);
1189 if (iph->protocol == IPPROTO_TCP) {
1191 tcp_hdr(skb)->check = 0;
1192 skb->csum = skb_checksum(skb, offset,
1193 skb->len - offset, 0);
1194 tcp_hdr(skb)->check =
1195 csum_tcpudp_magic(iph->saddr,
1200 } else if (iph->protocol == IPPROTO_UDP) {
1202 udp_hdr(skb)->check = 0;
1204 skb_checksum(skb, offset,
1205 skb->len - offset, 0);
1206 udp_hdr(skb)->check =
1207 csum_tcpudp_magic(iph->saddr,
1216 ring_num = tx_ring->next_to_use;
1217 if (unlikely((ring_num + 1) == tx_ring->count))
1218 tx_ring->next_to_use = 0;
1220 tx_ring->next_to_use = ring_num + 1;
1223 buffer_info = &tx_ring->buffer_info[ring_num];
1224 tmp_skb = buffer_info->skb;
1226 /* [Header:14][payload] ---> [Header:14][paddong:2][payload] */
1227 memcpy(tmp_skb->data, skb->data, ETH_HLEN);
1228 tmp_skb->data[ETH_HLEN] = 0x00;
1229 tmp_skb->data[ETH_HLEN + 1] = 0x00;
1230 tmp_skb->len = skb->len;
1231 memcpy(&tmp_skb->data[ETH_HLEN + 2], &skb->data[ETH_HLEN],
1232 (skb->len - ETH_HLEN));
1233 /*-- Set Buffer information --*/
1234 buffer_info->length = tmp_skb->len;
1235 buffer_info->dma = dma_map_single(&adapter->pdev->dev, tmp_skb->data,
1236 buffer_info->length,
1238 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1239 pr_err("TX DMA map failed\n");
1240 buffer_info->dma = 0;
1241 buffer_info->time_stamp = 0;
1242 tx_ring->next_to_use = ring_num;
1245 buffer_info->mapped = true;
1246 buffer_info->time_stamp = jiffies;
1248 /*-- Set Tx descriptor --*/
1249 tx_desc = PCH_GBE_TX_DESC(*tx_ring, ring_num);
1250 tx_desc->buffer_addr = (buffer_info->dma);
1251 tx_desc->length = (tmp_skb->len);
1252 tx_desc->tx_words_eob = ((tmp_skb->len + 3));
1253 tx_desc->tx_frame_ctrl = (frame_ctrl);
1254 tx_desc->gbec_status = (DSC_INIT16);
1256 if (unlikely(++ring_num == tx_ring->count))
1259 /* Update software pointer of TX descriptor */
1260 iowrite32(tx_ring->dma +
1261 (int)sizeof(struct pch_gbe_tx_desc) * ring_num,
1262 &hw->reg->TX_DSC_SW_P);
1264 #ifdef CONFIG_PCH_PTP
1265 pch_tx_timestamp(adapter, skb);
1268 dev_kfree_skb_any(skb);
1272 * pch_gbe_update_stats - Update the board statistics counters
1273 * @adapter: Board private structure
1275 void pch_gbe_update_stats(struct pch_gbe_adapter *adapter)
1277 struct net_device *netdev = adapter->netdev;
1278 struct pci_dev *pdev = adapter->pdev;
1279 struct pch_gbe_hw_stats *stats = &adapter->stats;
1280 unsigned long flags;
1283 * Prevent stats update while adapter is being reset, or if the pci
1284 * connection is down.
1286 if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
1289 spin_lock_irqsave(&adapter->stats_lock, flags);
1291 /* Update device status "adapter->stats" */
1292 stats->rx_errors = stats->rx_crc_errors + stats->rx_frame_errors;
1293 stats->tx_errors = stats->tx_length_errors +
1294 stats->tx_aborted_errors +
1295 stats->tx_carrier_errors + stats->tx_timeout_count;
1297 /* Update network device status "adapter->net_stats" */
1298 netdev->stats.rx_packets = stats->rx_packets;
1299 netdev->stats.rx_bytes = stats->rx_bytes;
1300 netdev->stats.rx_dropped = stats->rx_dropped;
1301 netdev->stats.tx_packets = stats->tx_packets;
1302 netdev->stats.tx_bytes = stats->tx_bytes;
1303 netdev->stats.tx_dropped = stats->tx_dropped;
1304 /* Fill out the OS statistics structure */
1305 netdev->stats.multicast = stats->multicast;
1306 netdev->stats.collisions = stats->collisions;
1308 netdev->stats.rx_errors = stats->rx_errors;
1309 netdev->stats.rx_crc_errors = stats->rx_crc_errors;
1310 netdev->stats.rx_frame_errors = stats->rx_frame_errors;
1312 netdev->stats.tx_errors = stats->tx_errors;
1313 netdev->stats.tx_aborted_errors = stats->tx_aborted_errors;
1314 netdev->stats.tx_carrier_errors = stats->tx_carrier_errors;
1316 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1319 static void pch_gbe_stop_receive(struct pch_gbe_adapter *adapter)
1321 struct pch_gbe_hw *hw = &adapter->hw;
1326 /* Disable Receive DMA */
1327 rxdma = ioread32(&hw->reg->DMA_CTRL);
1328 rxdma &= ~PCH_GBE_RX_DMA_EN;
1329 iowrite32(rxdma, &hw->reg->DMA_CTRL);
1330 /* Wait Rx DMA BUS is IDLE */
1331 ret = pch_gbe_wait_clr_bit_irq(&hw->reg->RX_DMA_ST, PCH_GBE_IDLE_CHECK);
1333 /* Disable Bus master */
1334 pci_read_config_word(adapter->pdev, PCI_COMMAND, &value);
1335 value &= ~PCI_COMMAND_MASTER;
1336 pci_write_config_word(adapter->pdev, PCI_COMMAND, value);
1338 pch_gbe_mac_reset_rx(hw);
1339 /* Enable Bus master */
1340 value |= PCI_COMMAND_MASTER;
1341 pci_write_config_word(adapter->pdev, PCI_COMMAND, value);
1344 pch_gbe_mac_reset_rx(hw);
1346 /* reprogram multicast address register after reset */
1347 pch_gbe_set_multi(adapter->netdev);
1350 static void pch_gbe_start_receive(struct pch_gbe_hw *hw)
1354 /* Enables Receive DMA */
1355 rxdma = ioread32(&hw->reg->DMA_CTRL);
1356 rxdma |= PCH_GBE_RX_DMA_EN;
1357 iowrite32(rxdma, &hw->reg->DMA_CTRL);
1358 /* Enables Receive */
1359 iowrite32(PCH_GBE_MRE_MAC_RX_EN, &hw->reg->MAC_RX_EN);
1364 * pch_gbe_intr - Interrupt Handler
1365 * @irq: Interrupt number
1366 * @data: Pointer to a network interface device structure
1368 * - IRQ_HANDLED: Our interrupt
1369 * - IRQ_NONE: Not our interrupt
1371 static irqreturn_t pch_gbe_intr(int irq, void *data)
1373 struct net_device *netdev = data;
1374 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1375 struct pch_gbe_hw *hw = &adapter->hw;
1379 /* Check request status */
1380 int_st = ioread32(&hw->reg->INT_ST);
1381 int_st = int_st & ioread32(&hw->reg->INT_EN);
1382 /* When request status is no interruption factor */
1383 if (unlikely(!int_st))
1384 return IRQ_NONE; /* Not our interrupt. End processing. */
1385 pr_debug("%s occur int_st = 0x%08x\n", __func__, int_st);
1386 if (int_st & PCH_GBE_INT_RX_FRAME_ERR)
1387 adapter->stats.intr_rx_frame_err_count++;
1388 if (int_st & PCH_GBE_INT_RX_FIFO_ERR)
1389 if (!adapter->rx_stop_flag) {
1390 adapter->stats.intr_rx_fifo_err_count++;
1391 pr_debug("Rx fifo over run\n");
1392 adapter->rx_stop_flag = true;
1393 int_en = ioread32(&hw->reg->INT_EN);
1394 iowrite32((int_en & ~PCH_GBE_INT_RX_FIFO_ERR),
1396 pch_gbe_stop_receive(adapter);
1397 int_st |= ioread32(&hw->reg->INT_ST);
1398 int_st = int_st & ioread32(&hw->reg->INT_EN);
1400 if (int_st & PCH_GBE_INT_RX_DMA_ERR)
1401 adapter->stats.intr_rx_dma_err_count++;
1402 if (int_st & PCH_GBE_INT_TX_FIFO_ERR)
1403 adapter->stats.intr_tx_fifo_err_count++;
1404 if (int_st & PCH_GBE_INT_TX_DMA_ERR)
1405 adapter->stats.intr_tx_dma_err_count++;
1406 if (int_st & PCH_GBE_INT_TCPIP_ERR)
1407 adapter->stats.intr_tcpip_err_count++;
1408 /* When Rx descriptor is empty */
1409 if ((int_st & PCH_GBE_INT_RX_DSC_EMP)) {
1410 adapter->stats.intr_rx_dsc_empty_count++;
1411 pr_debug("Rx descriptor is empty\n");
1412 int_en = ioread32(&hw->reg->INT_EN);
1413 iowrite32((int_en & ~PCH_GBE_INT_RX_DSC_EMP), &hw->reg->INT_EN);
1414 if (hw->mac.tx_fc_enable) {
1415 /* Set Pause packet */
1416 pch_gbe_mac_set_pause_packet(hw);
1420 /* When request status is Receive interruption */
1421 if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT)) ||
1422 (adapter->rx_stop_flag)) {
1423 if (likely(napi_schedule_prep(&adapter->napi))) {
1424 /* Enable only Rx Descriptor empty */
1425 atomic_inc(&adapter->irq_sem);
1426 int_en = ioread32(&hw->reg->INT_EN);
1428 ~(PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT);
1429 iowrite32(int_en, &hw->reg->INT_EN);
1430 /* Start polling for NAPI */
1431 __napi_schedule(&adapter->napi);
1434 pr_debug("return = 0x%08x INT_EN reg = 0x%08x\n",
1435 IRQ_HANDLED, ioread32(&hw->reg->INT_EN));
1440 * pch_gbe_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1441 * @adapter: Board private structure
1442 * @rx_ring: Rx descriptor ring
1443 * @cleaned_count: Cleaned count
1446 pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter *adapter,
1447 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1449 struct net_device *netdev = adapter->netdev;
1450 struct pci_dev *pdev = adapter->pdev;
1451 struct pch_gbe_hw *hw = &adapter->hw;
1452 struct pch_gbe_rx_desc *rx_desc;
1453 struct pch_gbe_buffer *buffer_info;
1454 struct sk_buff *skb;
1458 bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
1459 i = rx_ring->next_to_use;
1461 while ((cleaned_count--)) {
1462 buffer_info = &rx_ring->buffer_info[i];
1463 skb = netdev_alloc_skb(netdev, bufsz);
1464 if (unlikely(!skb)) {
1465 /* Better luck next round */
1466 adapter->stats.rx_alloc_buff_failed++;
1470 skb_reserve(skb, NET_IP_ALIGN);
1471 buffer_info->skb = skb;
1473 buffer_info->dma = dma_map_single(&pdev->dev,
1474 buffer_info->rx_buffer,
1475 buffer_info->length,
1477 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1479 buffer_info->skb = NULL;
1480 buffer_info->dma = 0;
1481 adapter->stats.rx_alloc_buff_failed++;
1482 break; /* while !buffer_info->skb */
1484 buffer_info->mapped = true;
1485 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1486 rx_desc->buffer_addr = (buffer_info->dma);
1487 rx_desc->gbec_status = DSC_INIT16;
1489 pr_debug("i = %d buffer_info->dma = 0x08%llx buffer_info->length = 0x%x\n",
1490 i, (unsigned long long)buffer_info->dma,
1491 buffer_info->length);
1493 if (unlikely(++i == rx_ring->count))
1496 if (likely(rx_ring->next_to_use != i)) {
1497 rx_ring->next_to_use = i;
1498 if (unlikely(i-- == 0))
1499 i = (rx_ring->count - 1);
1500 iowrite32(rx_ring->dma +
1501 (int)sizeof(struct pch_gbe_rx_desc) * i,
1502 &hw->reg->RX_DSC_SW_P);
1508 pch_gbe_alloc_rx_buffers_pool(struct pch_gbe_adapter *adapter,
1509 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1511 struct pci_dev *pdev = adapter->pdev;
1512 struct pch_gbe_buffer *buffer_info;
1517 bufsz = adapter->rx_buffer_len;
1519 size = rx_ring->count * bufsz + PCH_GBE_RESERVE_MEMORY;
1520 rx_ring->rx_buff_pool = dma_alloc_coherent(&pdev->dev, size,
1521 &rx_ring->rx_buff_pool_logic,
1523 if (!rx_ring->rx_buff_pool) {
1524 pr_err("Unable to allocate memory for the receive pool buffer\n");
1527 memset(rx_ring->rx_buff_pool, 0, size);
1528 rx_ring->rx_buff_pool_size = size;
1529 for (i = 0; i < rx_ring->count; i++) {
1530 buffer_info = &rx_ring->buffer_info[i];
1531 buffer_info->rx_buffer = rx_ring->rx_buff_pool + bufsz * i;
1532 buffer_info->length = bufsz;
1538 * pch_gbe_alloc_tx_buffers - Allocate transmit buffers
1539 * @adapter: Board private structure
1540 * @tx_ring: Tx descriptor ring
1542 static void pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter *adapter,
1543 struct pch_gbe_tx_ring *tx_ring)
1545 struct pch_gbe_buffer *buffer_info;
1546 struct sk_buff *skb;
1549 struct pch_gbe_tx_desc *tx_desc;
1552 adapter->hw.mac.max_frame_size + PCH_GBE_DMA_ALIGN + NET_IP_ALIGN;
1554 for (i = 0; i < tx_ring->count; i++) {
1555 buffer_info = &tx_ring->buffer_info[i];
1556 skb = netdev_alloc_skb(adapter->netdev, bufsz);
1557 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1558 buffer_info->skb = skb;
1559 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1560 tx_desc->gbec_status = (DSC_INIT16);
1566 * pch_gbe_clean_tx - Reclaim resources after transmit completes
1567 * @adapter: Board private structure
1568 * @tx_ring: Tx descriptor ring
1570 * true: Cleaned the descriptor
1571 * false: Not cleaned the descriptor
1574 pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
1575 struct pch_gbe_tx_ring *tx_ring)
1577 struct pch_gbe_tx_desc *tx_desc;
1578 struct pch_gbe_buffer *buffer_info;
1579 struct sk_buff *skb;
1581 unsigned int cleaned_count = 0;
1582 bool cleaned = false;
1585 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1587 i = tx_ring->next_to_clean;
1588 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1589 pr_debug("gbec_status:0x%04x dma_status:0x%04x\n",
1590 tx_desc->gbec_status, tx_desc->dma_status);
1592 unused = PCH_GBE_DESC_UNUSED(tx_ring);
1593 thresh = tx_ring->count - PCH_GBE_TX_WEIGHT;
1594 if ((tx_desc->gbec_status == DSC_INIT16) && (unused < thresh))
1595 { /* current marked clean, tx queue filling up, do extra clean */
1597 if (unused < 8) { /* tx queue nearly full */
1598 pr_debug("clean_tx: transmit queue warning (%x,%x) unused=%d\n",
1599 tx_ring->next_to_clean,tx_ring->next_to_use,unused);
1602 /* current marked clean, scan for more that need cleaning. */
1604 for (j = 0; j < PCH_GBE_TX_WEIGHT; j++)
1606 tx_desc = PCH_GBE_TX_DESC(*tx_ring, k);
1607 if (tx_desc->gbec_status != DSC_INIT16) break; /*found*/
1608 if (++k >= tx_ring->count) k = 0; /*increment, wrap*/
1610 if (j < PCH_GBE_TX_WEIGHT) {
1611 pr_debug("clean_tx: unused=%d loops=%d found tx_desc[%x,%x:%x].gbec_status=%04x\n",
1612 unused,j, i,k, tx_ring->next_to_use, tx_desc->gbec_status);
1613 i = k; /*found one to clean, usu gbec_status==2000.*/
1617 while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
1618 pr_debug("gbec_status:0x%04x\n", tx_desc->gbec_status);
1619 buffer_info = &tx_ring->buffer_info[i];
1620 skb = buffer_info->skb;
1623 if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
1624 adapter->stats.tx_aborted_errors++;
1625 pr_err("Transfer Abort Error\n");
1626 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CRSER)
1628 adapter->stats.tx_carrier_errors++;
1629 pr_err("Transfer Carrier Sense Error\n");
1630 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_EXCOL)
1632 adapter->stats.tx_aborted_errors++;
1633 pr_err("Transfer Collision Abort Error\n");
1634 } else if ((tx_desc->gbec_status &
1635 (PCH_GBE_TXD_GMAC_STAT_SNGCOL |
1636 PCH_GBE_TXD_GMAC_STAT_MLTCOL))) {
1637 adapter->stats.collisions++;
1638 adapter->stats.tx_packets++;
1639 adapter->stats.tx_bytes += skb->len;
1640 pr_debug("Transfer Collision\n");
1641 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CMPLT)
1643 adapter->stats.tx_packets++;
1644 adapter->stats.tx_bytes += skb->len;
1646 if (buffer_info->mapped) {
1647 pr_debug("unmap buffer_info->dma : %d\n", i);
1648 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1649 buffer_info->length, DMA_TO_DEVICE);
1650 buffer_info->mapped = false;
1652 if (buffer_info->skb) {
1653 pr_debug("trim buffer_info->skb : %d\n", i);
1654 skb_trim(buffer_info->skb, 0);
1656 tx_desc->gbec_status = DSC_INIT16;
1657 if (unlikely(++i == tx_ring->count))
1659 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1661 /* weight of a sort for tx, to avoid endless transmit cleanup */
1662 if (cleaned_count++ == PCH_GBE_TX_WEIGHT) {
1667 pr_debug("called pch_gbe_unmap_and_free_tx_resource() %d count\n",
1669 if (cleaned_count > 0) { /*skip this if nothing cleaned*/
1670 /* Recover from running out of Tx resources in xmit_frame */
1671 spin_lock(&tx_ring->tx_lock);
1672 if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev))))
1674 netif_wake_queue(adapter->netdev);
1675 adapter->stats.tx_restart_count++;
1676 pr_debug("Tx wake queue\n");
1679 tx_ring->next_to_clean = i;
1681 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1682 spin_unlock(&tx_ring->tx_lock);
1688 * pch_gbe_clean_rx - Send received data up the network stack; legacy
1689 * @adapter: Board private structure
1690 * @rx_ring: Rx descriptor ring
1691 * @work_done: Completed count
1692 * @work_to_do: Request count
1694 * true: Cleaned the descriptor
1695 * false: Not cleaned the descriptor
1698 pch_gbe_clean_rx(struct pch_gbe_adapter *adapter,
1699 struct pch_gbe_rx_ring *rx_ring,
1700 int *work_done, int work_to_do)
1702 struct net_device *netdev = adapter->netdev;
1703 struct pci_dev *pdev = adapter->pdev;
1704 struct pch_gbe_buffer *buffer_info;
1705 struct pch_gbe_rx_desc *rx_desc;
1708 unsigned int cleaned_count = 0;
1709 bool cleaned = false;
1710 struct sk_buff *skb;
1715 i = rx_ring->next_to_clean;
1717 while (*work_done < work_to_do) {
1718 /* Check Rx descriptor status */
1719 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1720 if (rx_desc->gbec_status == DSC_INIT16)
1725 dma_status = rx_desc->dma_status;
1726 gbec_status = rx_desc->gbec_status;
1727 tcp_ip_status = rx_desc->tcp_ip_status;
1728 rx_desc->gbec_status = DSC_INIT16;
1729 buffer_info = &rx_ring->buffer_info[i];
1730 skb = buffer_info->skb;
1731 buffer_info->skb = NULL;
1734 dma_unmap_single(&pdev->dev, buffer_info->dma,
1735 buffer_info->length, DMA_FROM_DEVICE);
1736 buffer_info->mapped = false;
1738 pr_debug("RxDecNo = 0x%04x Status[DMA:0x%02x GBE:0x%04x "
1739 "TCP:0x%08x] BufInf = 0x%p\n",
1740 i, dma_status, gbec_status, tcp_ip_status,
1743 if (unlikely(gbec_status & PCH_GBE_RXD_GMAC_STAT_NOTOCTAL)) {
1744 adapter->stats.rx_frame_errors++;
1745 pr_err("Receive Not Octal Error\n");
1746 } else if (unlikely(gbec_status &
1747 PCH_GBE_RXD_GMAC_STAT_NBLERR)) {
1748 adapter->stats.rx_frame_errors++;
1749 pr_err("Receive Nibble Error\n");
1750 } else if (unlikely(gbec_status &
1751 PCH_GBE_RXD_GMAC_STAT_CRCERR)) {
1752 adapter->stats.rx_crc_errors++;
1753 pr_err("Receive CRC Error\n");
1755 /* get receive length */
1756 /* length convert[-3], length includes FCS length */
1757 length = (rx_desc->rx_words_eob) - 3 - ETH_FCS_LEN;
1758 if (rx_desc->rx_words_eob & 0x02)
1759 length = length - 4;
1761 * buffer_info->rx_buffer: [Header:14][payload]
1762 * skb->data: [Reserve:2][Header:14][payload]
1764 memcpy(skb->data, buffer_info->rx_buffer, length);
1766 /* update status of driver */
1767 adapter->stats.rx_bytes += length;
1768 adapter->stats.rx_packets++;
1769 if ((gbec_status & PCH_GBE_RXD_GMAC_STAT_MARMLT))
1770 adapter->stats.multicast++;
1771 /* Write meta date of skb */
1772 skb_put(skb, length);
1774 #ifdef CONFIG_PCH_PTP
1775 pch_rx_timestamp(adapter, skb);
1778 skb->protocol = eth_type_trans(skb, netdev);
1779 if (tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK)
1780 skb->ip_summed = CHECKSUM_NONE;
1782 skb->ip_summed = CHECKSUM_UNNECESSARY;
1784 napi_gro_receive(&adapter->napi, skb);
1786 pr_debug("Receive skb->ip_summed: %d length: %d\n",
1787 skb->ip_summed, length);
1789 /* return some buffers to hardware, one at a time is too slow */
1790 if (unlikely(cleaned_count >= PCH_GBE_RX_BUFFER_WRITE)) {
1791 pch_gbe_alloc_rx_buffers(adapter, rx_ring,
1795 if (++i == rx_ring->count)
1798 rx_ring->next_to_clean = i;
1800 pch_gbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1805 * pch_gbe_setup_tx_resources - Allocate Tx resources (Descriptors)
1806 * @adapter: Board private structure
1807 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
1810 * Negative value: Failed
1812 int pch_gbe_setup_tx_resources(struct pch_gbe_adapter *adapter,
1813 struct pch_gbe_tx_ring *tx_ring)
1815 struct pci_dev *pdev = adapter->pdev;
1816 struct pch_gbe_tx_desc *tx_desc;
1820 size = (int)sizeof(struct pch_gbe_buffer) * tx_ring->count;
1821 tx_ring->buffer_info = vzalloc(size);
1822 if (!tx_ring->buffer_info)
1825 tx_ring->size = tx_ring->count * (int)sizeof(struct pch_gbe_tx_desc);
1827 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
1828 &tx_ring->dma, GFP_KERNEL);
1829 if (!tx_ring->desc) {
1830 vfree(tx_ring->buffer_info);
1831 pr_err("Unable to allocate memory for the transmit descriptor ring\n");
1834 memset(tx_ring->desc, 0, tx_ring->size);
1836 tx_ring->next_to_use = 0;
1837 tx_ring->next_to_clean = 0;
1838 spin_lock_init(&tx_ring->tx_lock);
1840 for (desNo = 0; desNo < tx_ring->count; desNo++) {
1841 tx_desc = PCH_GBE_TX_DESC(*tx_ring, desNo);
1842 tx_desc->gbec_status = DSC_INIT16;
1844 pr_debug("tx_ring->desc = 0x%p tx_ring->dma = 0x%08llx\n"
1845 "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1846 tx_ring->desc, (unsigned long long)tx_ring->dma,
1847 tx_ring->next_to_clean, tx_ring->next_to_use);
1852 * pch_gbe_setup_rx_resources - Allocate Rx resources (Descriptors)
1853 * @adapter: Board private structure
1854 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
1857 * Negative value: Failed
1859 int pch_gbe_setup_rx_resources(struct pch_gbe_adapter *adapter,
1860 struct pch_gbe_rx_ring *rx_ring)
1862 struct pci_dev *pdev = adapter->pdev;
1863 struct pch_gbe_rx_desc *rx_desc;
1867 size = (int)sizeof(struct pch_gbe_buffer) * rx_ring->count;
1868 rx_ring->buffer_info = vzalloc(size);
1869 if (!rx_ring->buffer_info)
1872 rx_ring->size = rx_ring->count * (int)sizeof(struct pch_gbe_rx_desc);
1873 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
1874 &rx_ring->dma, GFP_KERNEL);
1876 if (!rx_ring->desc) {
1877 pr_err("Unable to allocate memory for the receive descriptor ring\n");
1878 vfree(rx_ring->buffer_info);
1881 memset(rx_ring->desc, 0, rx_ring->size);
1882 rx_ring->next_to_clean = 0;
1883 rx_ring->next_to_use = 0;
1884 for (desNo = 0; desNo < rx_ring->count; desNo++) {
1885 rx_desc = PCH_GBE_RX_DESC(*rx_ring, desNo);
1886 rx_desc->gbec_status = DSC_INIT16;
1888 pr_debug("rx_ring->desc = 0x%p rx_ring->dma = 0x%08llx "
1889 "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1890 rx_ring->desc, (unsigned long long)rx_ring->dma,
1891 rx_ring->next_to_clean, rx_ring->next_to_use);
1896 * pch_gbe_free_tx_resources - Free Tx Resources
1897 * @adapter: Board private structure
1898 * @tx_ring: Tx descriptor ring for a specific queue
1900 void pch_gbe_free_tx_resources(struct pch_gbe_adapter *adapter,
1901 struct pch_gbe_tx_ring *tx_ring)
1903 struct pci_dev *pdev = adapter->pdev;
1905 pch_gbe_clean_tx_ring(adapter, tx_ring);
1906 vfree(tx_ring->buffer_info);
1907 tx_ring->buffer_info = NULL;
1908 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1909 tx_ring->desc = NULL;
1913 * pch_gbe_free_rx_resources - Free Rx Resources
1914 * @adapter: Board private structure
1915 * @rx_ring: Ring to clean the resources from
1917 void pch_gbe_free_rx_resources(struct pch_gbe_adapter *adapter,
1918 struct pch_gbe_rx_ring *rx_ring)
1920 struct pci_dev *pdev = adapter->pdev;
1922 pch_gbe_clean_rx_ring(adapter, rx_ring);
1923 vfree(rx_ring->buffer_info);
1924 rx_ring->buffer_info = NULL;
1925 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1926 rx_ring->desc = NULL;
1930 * pch_gbe_request_irq - Allocate an interrupt line
1931 * @adapter: Board private structure
1934 * Negative value: Failed
1936 static int pch_gbe_request_irq(struct pch_gbe_adapter *adapter)
1938 struct net_device *netdev = adapter->netdev;
1942 flags = IRQF_SHARED;
1943 adapter->have_msi = false;
1944 err = pci_enable_msi(adapter->pdev);
1945 pr_debug("call pci_enable_msi\n");
1947 pr_debug("call pci_enable_msi - Error: %d\n", err);
1950 adapter->have_msi = true;
1952 err = request_irq(adapter->pdev->irq, &pch_gbe_intr,
1953 flags, netdev->name, netdev);
1955 pr_err("Unable to allocate interrupt Error: %d\n", err);
1956 pr_debug("adapter->have_msi : %d flags : 0x%04x return : 0x%04x\n",
1957 adapter->have_msi, flags, err);
1963 * pch_gbe_up - Up GbE network device
1964 * @adapter: Board private structure
1967 * Negative value: Failed
1969 int pch_gbe_up(struct pch_gbe_adapter *adapter)
1971 struct net_device *netdev = adapter->netdev;
1972 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1973 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1976 /* Ensure we have a valid MAC */
1977 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
1978 pr_err("Error: Invalid MAC address\n");
1982 /* hardware has been reset, we need to reload some things */
1983 pch_gbe_set_multi(netdev);
1985 pch_gbe_setup_tctl(adapter);
1986 pch_gbe_configure_tx(adapter);
1987 pch_gbe_setup_rctl(adapter);
1988 pch_gbe_configure_rx(adapter);
1990 err = pch_gbe_request_irq(adapter);
1992 pr_err("Error: can't bring device up\n");
1995 err = pch_gbe_alloc_rx_buffers_pool(adapter, rx_ring, rx_ring->count);
1997 pr_err("Error: can't bring device up\n");
2000 pch_gbe_alloc_tx_buffers(adapter, tx_ring);
2001 pch_gbe_alloc_rx_buffers(adapter, rx_ring, rx_ring->count);
2002 adapter->tx_queue_len = netdev->tx_queue_len;
2003 pch_gbe_start_receive(&adapter->hw);
2005 mod_timer(&adapter->watchdog_timer, jiffies);
2007 napi_enable(&adapter->napi);
2008 pch_gbe_irq_enable(adapter);
2009 netif_start_queue(adapter->netdev);
2015 * pch_gbe_down - Down GbE network device
2016 * @adapter: Board private structure
2018 void pch_gbe_down(struct pch_gbe_adapter *adapter)
2020 struct net_device *netdev = adapter->netdev;
2021 struct pci_dev *pdev = adapter->pdev;
2022 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
2024 /* signal that we're down so the interrupt handler does not
2025 * reschedule our watchdog timer */
2026 napi_disable(&adapter->napi);
2027 atomic_set(&adapter->irq_sem, 0);
2029 pch_gbe_irq_disable(adapter);
2030 pch_gbe_free_irq(adapter);
2032 del_timer_sync(&adapter->watchdog_timer);
2034 netdev->tx_queue_len = adapter->tx_queue_len;
2035 netif_carrier_off(netdev);
2036 netif_stop_queue(netdev);
2038 if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
2039 pch_gbe_reset(adapter);
2040 pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
2041 pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
2043 pci_free_consistent(adapter->pdev, rx_ring->rx_buff_pool_size,
2044 rx_ring->rx_buff_pool, rx_ring->rx_buff_pool_logic);
2045 rx_ring->rx_buff_pool_logic = 0;
2046 rx_ring->rx_buff_pool_size = 0;
2047 rx_ring->rx_buff_pool = NULL;
2051 * pch_gbe_sw_init - Initialize general software structures (struct pch_gbe_adapter)
2052 * @adapter: Board private structure to initialize
2055 * Negative value: Failed
2057 static int pch_gbe_sw_init(struct pch_gbe_adapter *adapter)
2059 struct pch_gbe_hw *hw = &adapter->hw;
2060 struct net_device *netdev = adapter->netdev;
2062 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
2063 hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2064 hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
2066 /* Initialize the hardware-specific values */
2067 if (pch_gbe_hal_setup_init_funcs(hw)) {
2068 pr_err("Hardware Initialization Failure\n");
2071 if (pch_gbe_alloc_queues(adapter)) {
2072 pr_err("Unable to allocate memory for queues\n");
2075 spin_lock_init(&adapter->hw.miim_lock);
2076 spin_lock_init(&adapter->stats_lock);
2077 spin_lock_init(&adapter->ethtool_lock);
2078 atomic_set(&adapter->irq_sem, 0);
2079 pch_gbe_irq_disable(adapter);
2081 pch_gbe_init_stats(adapter);
2083 pr_debug("rx_buffer_len : %d mac.min_frame_size : %d mac.max_frame_size : %d\n",
2084 (u32) adapter->rx_buffer_len,
2085 hw->mac.min_frame_size, hw->mac.max_frame_size);
2090 * pch_gbe_open - Called when a network interface is made active
2091 * @netdev: Network interface device structure
2094 * Negative value: Failed
2096 static int pch_gbe_open(struct net_device *netdev)
2098 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2099 struct pch_gbe_hw *hw = &adapter->hw;
2102 /* allocate transmit descriptors */
2103 err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
2106 /* allocate receive descriptors */
2107 err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
2110 pch_gbe_hal_power_up_phy(hw);
2111 err = pch_gbe_up(adapter);
2114 pr_debug("Success End\n");
2118 if (!adapter->wake_up_evt)
2119 pch_gbe_hal_power_down_phy(hw);
2120 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
2122 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
2124 pch_gbe_reset(adapter);
2125 pr_err("Error End\n");
2130 * pch_gbe_stop - Disables a network interface
2131 * @netdev: Network interface device structure
2135 static int pch_gbe_stop(struct net_device *netdev)
2137 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2138 struct pch_gbe_hw *hw = &adapter->hw;
2140 pch_gbe_down(adapter);
2141 if (!adapter->wake_up_evt)
2142 pch_gbe_hal_power_down_phy(hw);
2143 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
2144 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
2149 * pch_gbe_xmit_frame - Packet transmitting start
2150 * @skb: Socket buffer structure
2151 * @netdev: Network interface device structure
2153 * - NETDEV_TX_OK: Normal end
2154 * - NETDEV_TX_BUSY: Error end
2156 static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2158 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2159 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
2160 unsigned long flags;
2162 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags)) {
2163 /* Collision - tell upper layer to requeue */
2164 return NETDEV_TX_LOCKED;
2166 if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) {
2167 netif_stop_queue(netdev);
2168 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2169 pr_debug("Return : BUSY next_to use : 0x%08x next_to clean : 0x%08x\n",
2170 tx_ring->next_to_use, tx_ring->next_to_clean);
2171 return NETDEV_TX_BUSY;
2174 /* CRC,ITAG no support */
2175 pch_gbe_tx_queue(adapter, tx_ring, skb);
2176 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2177 return NETDEV_TX_OK;
2181 * pch_gbe_get_stats - Get System Network Statistics
2182 * @netdev: Network interface device structure
2183 * Returns: The current stats
2185 static struct net_device_stats *pch_gbe_get_stats(struct net_device *netdev)
2187 /* only return the current stats */
2188 return &netdev->stats;
2192 * pch_gbe_set_multi - Multicast and Promiscuous mode set
2193 * @netdev: Network interface device structure
2195 static void pch_gbe_set_multi(struct net_device *netdev)
2197 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2198 struct pch_gbe_hw *hw = &adapter->hw;
2199 struct netdev_hw_addr *ha;
2205 pr_debug("netdev->flags : 0x%08x\n", netdev->flags);
2207 /* Check for Promiscuous and All Multicast modes */
2208 rctl = ioread32(&hw->reg->RX_MODE);
2209 mc_count = netdev_mc_count(netdev);
2210 if ((netdev->flags & IFF_PROMISC)) {
2211 rctl &= ~PCH_GBE_ADD_FIL_EN;
2212 rctl &= ~PCH_GBE_MLT_FIL_EN;
2213 } else if ((netdev->flags & IFF_ALLMULTI)) {
2214 /* all the multicasting receive permissions */
2215 rctl |= PCH_GBE_ADD_FIL_EN;
2216 rctl &= ~PCH_GBE_MLT_FIL_EN;
2218 if (mc_count >= PCH_GBE_MAR_ENTRIES) {
2219 /* all the multicasting receive permissions */
2220 rctl |= PCH_GBE_ADD_FIL_EN;
2221 rctl &= ~PCH_GBE_MLT_FIL_EN;
2223 rctl |= (PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN);
2226 iowrite32(rctl, &hw->reg->RX_MODE);
2228 if (mc_count >= PCH_GBE_MAR_ENTRIES)
2230 mta_list = kmalloc(mc_count * ETH_ALEN, GFP_ATOMIC);
2234 /* The shared function expects a packed array of only addresses. */
2236 netdev_for_each_mc_addr(ha, netdev) {
2239 memcpy(mta_list + (i++ * ETH_ALEN), &ha->addr, ETH_ALEN);
2241 pch_gbe_mac_mc_addr_list_update(hw, mta_list, i, 1,
2242 PCH_GBE_MAR_ENTRIES);
2245 pr_debug("RX_MODE reg(check bit31,30 ADD,MLT) : 0x%08x netdev->mc_count : 0x%08x\n",
2246 ioread32(&hw->reg->RX_MODE), mc_count);
2250 * pch_gbe_set_mac - Change the Ethernet Address of the NIC
2251 * @netdev: Network interface device structure
2252 * @addr: Pointer to an address structure
2255 * -EADDRNOTAVAIL: Failed
2257 static int pch_gbe_set_mac(struct net_device *netdev, void *addr)
2259 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2260 struct sockaddr *skaddr = addr;
2263 if (!is_valid_ether_addr(skaddr->sa_data)) {
2264 ret_val = -EADDRNOTAVAIL;
2266 memcpy(netdev->dev_addr, skaddr->sa_data, netdev->addr_len);
2267 memcpy(adapter->hw.mac.addr, skaddr->sa_data, netdev->addr_len);
2268 pch_gbe_mac_mar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2271 pr_debug("ret_val : 0x%08x\n", ret_val);
2272 pr_debug("dev_addr : %pM\n", netdev->dev_addr);
2273 pr_debug("mac_addr : %pM\n", adapter->hw.mac.addr);
2274 pr_debug("MAC_ADR1AB reg : 0x%08x 0x%08x\n",
2275 ioread32(&adapter->hw.reg->mac_adr[0].high),
2276 ioread32(&adapter->hw.reg->mac_adr[0].low));
2281 * pch_gbe_change_mtu - Change the Maximum Transfer Unit
2282 * @netdev: Network interface device structure
2283 * @new_mtu: New value for maximum frame size
2288 static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
2290 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2292 unsigned long old_rx_buffer_len = adapter->rx_buffer_len;
2295 max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2296 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
2297 (max_frame > PCH_GBE_MAX_JUMBO_FRAME_SIZE)) {
2298 pr_err("Invalid MTU setting\n");
2301 if (max_frame <= PCH_GBE_FRAME_SIZE_2048)
2302 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
2303 else if (max_frame <= PCH_GBE_FRAME_SIZE_4096)
2304 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_4096;
2305 else if (max_frame <= PCH_GBE_FRAME_SIZE_8192)
2306 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_8192;
2308 adapter->rx_buffer_len = PCH_GBE_MAX_RX_BUFFER_SIZE;
2310 if (netif_running(netdev)) {
2311 pch_gbe_down(adapter);
2312 err = pch_gbe_up(adapter);
2314 adapter->rx_buffer_len = old_rx_buffer_len;
2315 pch_gbe_up(adapter);
2318 netdev->mtu = new_mtu;
2319 adapter->hw.mac.max_frame_size = max_frame;
2322 pch_gbe_reset(adapter);
2323 netdev->mtu = new_mtu;
2324 adapter->hw.mac.max_frame_size = max_frame;
2327 pr_debug("max_frame : %d rx_buffer_len : %d mtu : %d max_frame_size : %d\n",
2328 max_frame, (u32) adapter->rx_buffer_len, netdev->mtu,
2329 adapter->hw.mac.max_frame_size);
2334 * pch_gbe_set_features - Reset device after features changed
2335 * @netdev: Network interface device structure
2336 * @features: New features
2338 * 0: HW state updated successfully
2340 static int pch_gbe_set_features(struct net_device *netdev,
2341 netdev_features_t features)
2343 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2344 netdev_features_t changed = features ^ netdev->features;
2346 if (!(changed & NETIF_F_RXCSUM))
2349 if (netif_running(netdev))
2350 pch_gbe_reinit_locked(adapter);
2352 pch_gbe_reset(adapter);
2358 * pch_gbe_ioctl - Controls register through a MII interface
2359 * @netdev: Network interface device structure
2360 * @ifr: Pointer to ifr structure
2361 * @cmd: Control command
2364 * Negative value: Failed
2366 static int pch_gbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2368 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2370 pr_debug("cmd : 0x%04x\n", cmd);
2372 #ifdef CONFIG_PCH_PTP
2373 if (cmd == SIOCSHWTSTAMP)
2374 return hwtstamp_ioctl(netdev, ifr, cmd);
2377 return generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
2381 * pch_gbe_tx_timeout - Respond to a Tx Hang
2382 * @netdev: Network interface device structure
2384 static void pch_gbe_tx_timeout(struct net_device *netdev)
2386 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2388 /* Do the reset outside of interrupt context */
2389 adapter->stats.tx_timeout_count++;
2390 schedule_work(&adapter->reset_task);
2394 * pch_gbe_napi_poll - NAPI receive and transfer polling callback
2395 * @napi: Pointer of polling device struct
2396 * @budget: The maximum number of a packet
2398 * false: Exit the polling mode
2399 * true: Continue the polling mode
2401 static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
2403 struct pch_gbe_adapter *adapter =
2404 container_of(napi, struct pch_gbe_adapter, napi);
2406 bool poll_end_flag = false;
2407 bool cleaned = false;
2410 pr_debug("budget : %d\n", budget);
2412 pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
2413 cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
2417 /* If no Tx and not enough Rx work done,
2418 * exit the polling mode
2420 if (work_done < budget)
2421 poll_end_flag = true;
2423 if (poll_end_flag) {
2424 napi_complete(napi);
2425 if (adapter->rx_stop_flag) {
2426 adapter->rx_stop_flag = false;
2427 pch_gbe_start_receive(&adapter->hw);
2429 pch_gbe_irq_enable(adapter);
2431 if (adapter->rx_stop_flag) {
2432 adapter->rx_stop_flag = false;
2433 pch_gbe_start_receive(&adapter->hw);
2434 int_en = ioread32(&adapter->hw.reg->INT_EN);
2435 iowrite32((int_en | PCH_GBE_INT_RX_FIFO_ERR),
2436 &adapter->hw.reg->INT_EN);
2439 pr_debug("poll_end_flag : %d work_done : %d budget : %d\n",
2440 poll_end_flag, work_done, budget);
2445 #ifdef CONFIG_NET_POLL_CONTROLLER
2447 * pch_gbe_netpoll - Used by things like netconsole to send skbs
2448 * @netdev: Network interface device structure
2450 static void pch_gbe_netpoll(struct net_device *netdev)
2452 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2454 disable_irq(adapter->pdev->irq);
2455 pch_gbe_intr(adapter->pdev->irq, netdev);
2456 enable_irq(adapter->pdev->irq);
2460 static const struct net_device_ops pch_gbe_netdev_ops = {
2461 .ndo_open = pch_gbe_open,
2462 .ndo_stop = pch_gbe_stop,
2463 .ndo_start_xmit = pch_gbe_xmit_frame,
2464 .ndo_get_stats = pch_gbe_get_stats,
2465 .ndo_set_mac_address = pch_gbe_set_mac,
2466 .ndo_tx_timeout = pch_gbe_tx_timeout,
2467 .ndo_change_mtu = pch_gbe_change_mtu,
2468 .ndo_set_features = pch_gbe_set_features,
2469 .ndo_do_ioctl = pch_gbe_ioctl,
2470 .ndo_set_rx_mode = pch_gbe_set_multi,
2471 #ifdef CONFIG_NET_POLL_CONTROLLER
2472 .ndo_poll_controller = pch_gbe_netpoll,
2476 static pci_ers_result_t pch_gbe_io_error_detected(struct pci_dev *pdev,
2477 pci_channel_state_t state)
2479 struct net_device *netdev = pci_get_drvdata(pdev);
2480 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2482 netif_device_detach(netdev);
2483 if (netif_running(netdev))
2484 pch_gbe_down(adapter);
2485 pci_disable_device(pdev);
2486 /* Request a slot slot reset. */
2487 return PCI_ERS_RESULT_NEED_RESET;
2490 static pci_ers_result_t pch_gbe_io_slot_reset(struct pci_dev *pdev)
2492 struct net_device *netdev = pci_get_drvdata(pdev);
2493 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2494 struct pch_gbe_hw *hw = &adapter->hw;
2496 if (pci_enable_device(pdev)) {
2497 pr_err("Cannot re-enable PCI device after reset\n");
2498 return PCI_ERS_RESULT_DISCONNECT;
2500 pci_set_master(pdev);
2501 pci_enable_wake(pdev, PCI_D0, 0);
2502 pch_gbe_hal_power_up_phy(hw);
2503 pch_gbe_reset(adapter);
2504 /* Clear wake up status */
2505 pch_gbe_mac_set_wol_event(hw, 0);
2507 return PCI_ERS_RESULT_RECOVERED;
2510 static void pch_gbe_io_resume(struct pci_dev *pdev)
2512 struct net_device *netdev = pci_get_drvdata(pdev);
2513 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2515 if (netif_running(netdev)) {
2516 if (pch_gbe_up(adapter)) {
2517 pr_debug("can't bring device back up after reset\n");
2521 netif_device_attach(netdev);
2524 static int __pch_gbe_suspend(struct pci_dev *pdev)
2526 struct net_device *netdev = pci_get_drvdata(pdev);
2527 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2528 struct pch_gbe_hw *hw = &adapter->hw;
2529 u32 wufc = adapter->wake_up_evt;
2532 netif_device_detach(netdev);
2533 if (netif_running(netdev))
2534 pch_gbe_down(adapter);
2536 pch_gbe_set_multi(netdev);
2537 pch_gbe_setup_rctl(adapter);
2538 pch_gbe_configure_rx(adapter);
2539 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
2540 hw->mac.link_duplex);
2541 pch_gbe_set_mode(adapter, hw->mac.link_speed,
2542 hw->mac.link_duplex);
2543 pch_gbe_mac_set_wol_event(hw, wufc);
2544 pci_disable_device(pdev);
2546 pch_gbe_hal_power_down_phy(hw);
2547 pch_gbe_mac_set_wol_event(hw, wufc);
2548 pci_disable_device(pdev);
2554 static int pch_gbe_suspend(struct device *device)
2556 struct pci_dev *pdev = to_pci_dev(device);
2558 return __pch_gbe_suspend(pdev);
2561 static int pch_gbe_resume(struct device *device)
2563 struct pci_dev *pdev = to_pci_dev(device);
2564 struct net_device *netdev = pci_get_drvdata(pdev);
2565 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2566 struct pch_gbe_hw *hw = &adapter->hw;
2569 err = pci_enable_device(pdev);
2571 pr_err("Cannot enable PCI device from suspend\n");
2574 pci_set_master(pdev);
2575 pch_gbe_hal_power_up_phy(hw);
2576 pch_gbe_reset(adapter);
2577 /* Clear wake on lan control and status */
2578 pch_gbe_mac_set_wol_event(hw, 0);
2580 if (netif_running(netdev))
2581 pch_gbe_up(adapter);
2582 netif_device_attach(netdev);
2586 #endif /* CONFIG_PM */
2588 static void pch_gbe_shutdown(struct pci_dev *pdev)
2590 __pch_gbe_suspend(pdev);
2591 if (system_state == SYSTEM_POWER_OFF) {
2592 pci_wake_from_d3(pdev, true);
2593 pci_set_power_state(pdev, PCI_D3hot);
2597 static void pch_gbe_remove(struct pci_dev *pdev)
2599 struct net_device *netdev = pci_get_drvdata(pdev);
2600 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2602 cancel_work_sync(&adapter->reset_task);
2603 unregister_netdev(netdev);
2605 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2607 kfree(adapter->tx_ring);
2608 kfree(adapter->rx_ring);
2610 iounmap(adapter->hw.reg);
2611 pci_release_regions(pdev);
2612 free_netdev(netdev);
2613 pci_disable_device(pdev);
2616 static int pch_gbe_probe(struct pci_dev *pdev,
2617 const struct pci_device_id *pci_id)
2619 struct net_device *netdev;
2620 struct pch_gbe_adapter *adapter;
2623 ret = pci_enable_device(pdev);
2627 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
2628 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
2629 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2631 ret = pci_set_consistent_dma_mask(pdev,
2634 dev_err(&pdev->dev, "ERR: No usable DMA "
2635 "configuration, aborting\n");
2636 goto err_disable_device;
2641 ret = pci_request_regions(pdev, KBUILD_MODNAME);
2644 "ERR: Can't reserve PCI I/O and memory resources\n");
2645 goto err_disable_device;
2647 pci_set_master(pdev);
2649 netdev = alloc_etherdev((int)sizeof(struct pch_gbe_adapter));
2652 goto err_release_pci;
2654 SET_NETDEV_DEV(netdev, &pdev->dev);
2656 pci_set_drvdata(pdev, netdev);
2657 adapter = netdev_priv(netdev);
2658 adapter->netdev = netdev;
2659 adapter->pdev = pdev;
2660 adapter->hw.back = adapter;
2661 adapter->hw.reg = pci_iomap(pdev, PCH_GBE_PCI_BAR, 0);
2662 if (!adapter->hw.reg) {
2664 dev_err(&pdev->dev, "Can't ioremap\n");
2665 goto err_free_netdev;
2668 #ifdef CONFIG_PCH_PTP
2669 adapter->ptp_pdev = pci_get_bus_and_slot(adapter->pdev->bus->number,
2671 if (ptp_filter_init(ptp_filter, ARRAY_SIZE(ptp_filter))) {
2672 pr_err("Bad ptp filter\n");
2677 netdev->netdev_ops = &pch_gbe_netdev_ops;
2678 netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
2679 netif_napi_add(netdev, &adapter->napi,
2680 pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
2681 netdev->hw_features = NETIF_F_RXCSUM |
2682 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2683 netdev->features = netdev->hw_features;
2684 pch_gbe_set_ethtool_ops(netdev);
2686 pch_gbe_mac_load_mac_addr(&adapter->hw);
2687 pch_gbe_mac_reset_hw(&adapter->hw);
2689 /* setup the private structure */
2690 ret = pch_gbe_sw_init(adapter);
2694 /* Initialize PHY */
2695 ret = pch_gbe_init_phy(adapter);
2697 dev_err(&pdev->dev, "PHY initialize error\n");
2698 goto err_free_adapter;
2700 pch_gbe_hal_get_bus_info(&adapter->hw);
2702 /* Read the MAC address. and store to the private data */
2703 ret = pch_gbe_hal_read_mac_addr(&adapter->hw);
2705 dev_err(&pdev->dev, "MAC address Read Error\n");
2706 goto err_free_adapter;
2709 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2710 if (!is_valid_ether_addr(netdev->dev_addr)) {
2712 * If the MAC is invalid (or just missing), display a warning
2713 * but do not abort setting up the device. pch_gbe_up will
2714 * prevent the interface from being brought up until a valid MAC
2717 dev_err(&pdev->dev, "Invalid MAC address, "
2718 "interface disabled.\n");
2720 setup_timer(&adapter->watchdog_timer, pch_gbe_watchdog,
2721 (unsigned long)adapter);
2723 INIT_WORK(&adapter->reset_task, pch_gbe_reset_task);
2725 pch_gbe_check_options(adapter);
2727 /* initialize the wol settings based on the eeprom settings */
2728 adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
2729 dev_info(&pdev->dev, "MAC address : %pM\n", netdev->dev_addr);
2731 /* reset the hardware with the new settings */
2732 pch_gbe_reset(adapter);
2734 ret = register_netdev(netdev);
2736 goto err_free_adapter;
2737 /* tell the stack to leave us alone until pch_gbe_open() is called */
2738 netif_carrier_off(netdev);
2739 netif_stop_queue(netdev);
2741 dev_dbg(&pdev->dev, "PCH Network Connection\n");
2743 device_set_wakeup_enable(&pdev->dev, 1);
2747 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2748 kfree(adapter->tx_ring);
2749 kfree(adapter->rx_ring);
2751 iounmap(adapter->hw.reg);
2753 free_netdev(netdev);
2755 pci_release_regions(pdev);
2757 pci_disable_device(pdev);
2761 static DEFINE_PCI_DEVICE_TABLE(pch_gbe_pcidev_id) = {
2762 {.vendor = PCI_VENDOR_ID_INTEL,
2763 .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2764 .subvendor = PCI_ANY_ID,
2765 .subdevice = PCI_ANY_ID,
2766 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2767 .class_mask = (0xFFFF00)
2769 {.vendor = PCI_VENDOR_ID_ROHM,
2770 .device = PCI_DEVICE_ID_ROHM_ML7223_GBE,
2771 .subvendor = PCI_ANY_ID,
2772 .subdevice = PCI_ANY_ID,
2773 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2774 .class_mask = (0xFFFF00)
2776 {.vendor = PCI_VENDOR_ID_ROHM,
2777 .device = PCI_DEVICE_ID_ROHM_ML7831_GBE,
2778 .subvendor = PCI_ANY_ID,
2779 .subdevice = PCI_ANY_ID,
2780 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2781 .class_mask = (0xFFFF00)
2783 /* required last entry */
2788 static const struct dev_pm_ops pch_gbe_pm_ops = {
2789 .suspend = pch_gbe_suspend,
2790 .resume = pch_gbe_resume,
2791 .freeze = pch_gbe_suspend,
2792 .thaw = pch_gbe_resume,
2793 .poweroff = pch_gbe_suspend,
2794 .restore = pch_gbe_resume,
2798 static const struct pci_error_handlers pch_gbe_err_handler = {
2799 .error_detected = pch_gbe_io_error_detected,
2800 .slot_reset = pch_gbe_io_slot_reset,
2801 .resume = pch_gbe_io_resume
2804 static struct pci_driver pch_gbe_driver = {
2805 .name = KBUILD_MODNAME,
2806 .id_table = pch_gbe_pcidev_id,
2807 .probe = pch_gbe_probe,
2808 .remove = pch_gbe_remove,
2810 .driver.pm = &pch_gbe_pm_ops,
2812 .shutdown = pch_gbe_shutdown,
2813 .err_handler = &pch_gbe_err_handler
2817 static int __init pch_gbe_init_module(void)
2821 pr_info("EG20T PCH Gigabit Ethernet Driver - version %s\n",DRV_VERSION);
2822 ret = pci_register_driver(&pch_gbe_driver);
2823 if (copybreak != PCH_GBE_COPYBREAK_DEFAULT) {
2824 if (copybreak == 0) {
2825 pr_info("copybreak disabled\n");
2827 pr_info("copybreak enabled for packets <= %u bytes\n",
2834 static void __exit pch_gbe_exit_module(void)
2836 pci_unregister_driver(&pch_gbe_driver);
2839 module_init(pch_gbe_init_module);
2840 module_exit(pch_gbe_exit_module);
2842 MODULE_DESCRIPTION("EG20T PCH Gigabit ethernet Driver");
2843 MODULE_AUTHOR("LAPIS SEMICONDUCTOR, <tshimizu818@gmail.com>");
2844 MODULE_LICENSE("GPL");
2845 MODULE_VERSION(DRV_VERSION);
2846 MODULE_DEVICE_TABLE(pci, pch_gbe_pcidev_id);
2848 module_param(copybreak, uint, 0644);
2849 MODULE_PARM_DESC(copybreak,
2850 "Maximum size of packet that is copied to a new buffer on receive");
2852 /* pch_gbe_main.c */