1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * New driver for Marvell Yukon 2 chipset.
4  * Based on earlier sk98lin, and skge driver.
5  *
6  * This driver intentionally does not support all the features
7  * of the original driver such as link fail-over and link management because
8  * those should be done at higher levels.
9  *
10  * Copyright (C) 2005 Stephen Hemminger <shemminger@osdl.org>
11  */
12 
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 
15 #include <linux/crc32.h>
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/netdevice.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/etherdevice.h>
21 #include <linux/ethtool.h>
22 #include <linux/pci.h>
23 #include <linux/interrupt.h>
24 #include <linux/ip.h>
25 #include <linux/slab.h>
26 #include <net/ip.h>
27 #include <linux/tcp.h>
28 #include <linux/in.h>
29 #include <linux/delay.h>
30 #include <linux/workqueue.h>
31 #include <linux/if_vlan.h>
32 #include <linux/prefetch.h>
33 #include <linux/debugfs.h>
34 #include <linux/mii.h>
35 #include <linux/of_device.h>
36 #include <linux/of_net.h>
37 #include <linux/dmi.h>
38 
39 #include <asm/irq.h>
40 
41 #include "sky2.h"
42 
43 #define DRV_NAME		"sky2"
44 #define DRV_VERSION		"1.30"
45 
46 /*
47  * The Yukon II chipset takes 64 bit command blocks (called list elements)
48  * that are organized into three (receive, transmit, status) different rings
49  * similar to Tigon3.
50  */
51 
52 #define RX_LE_SIZE	    	1024
53 #define RX_LE_BYTES		(RX_LE_SIZE*sizeof(struct sky2_rx_le))
54 #define RX_MAX_PENDING		(RX_LE_SIZE/6 - 2)
55 #define RX_DEF_PENDING		RX_MAX_PENDING
56 
57 /* This is the worst case number of transmit list elements for a single skb:
58  * VLAN:GSO + CKSUM + Data + skb_frags * DMA
59  */
60 #define MAX_SKB_TX_LE	(2 + (sizeof(dma_addr_t)/sizeof(u32))*(MAX_SKB_FRAGS+1))
61 #define TX_MIN_PENDING		(MAX_SKB_TX_LE+1)
62 #define TX_MAX_PENDING		1024
63 #define TX_DEF_PENDING		63
64 
65 #define TX_WATCHDOG		(5 * HZ)
66 #define PHY_RETRIES		1000
67 
68 #define SKY2_EEPROM_MAGIC	0x9955aabb
69 
70 #define RING_NEXT(x, s)	(((x)+1) & ((s)-1))
71 
72 static const u32 default_msg =
73     NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK
74     | NETIF_MSG_TIMER | NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR
75     | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN;
76 
77 static int debug = -1;		/* defaults above */
78 module_param(debug, int, 0);
79 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
80 
81 static int copybreak __read_mostly = 128;
82 module_param(copybreak, int, 0);
83 MODULE_PARM_DESC(copybreak, "Receive copy threshold");
84 
85 static int disable_msi = -1;
86 module_param(disable_msi, int, 0);
87 MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)");
88 
89 static int legacy_pme = 0;
90 module_param(legacy_pme, int, 0);
91 MODULE_PARM_DESC(legacy_pme, "Legacy power management");
92 
93 static const struct pci_device_id sky2_id_table[] = {
94 	{ PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9000) }, /* SK-9Sxx */
95 	{ PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9E00) }, /* SK-9Exx */
96 	{ PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9E01) }, /* SK-9E21M */
97 	{ PCI_DEVICE(PCI_VENDOR_ID_DLINK, 0x4b00) },	/* DGE-560T */
98 	{ PCI_DEVICE(PCI_VENDOR_ID_DLINK, 0x4001) }, 	/* DGE-550SX */
99 	{ PCI_DEVICE(PCI_VENDOR_ID_DLINK, 0x4B02) },	/* DGE-560SX */
100 	{ PCI_DEVICE(PCI_VENDOR_ID_DLINK, 0x4B03) },	/* DGE-550T */
101 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4340) }, /* 88E8021 */
102 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4341) }, /* 88E8022 */
103 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4342) }, /* 88E8061 */
104 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4343) }, /* 88E8062 */
105 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4344) }, /* 88E8021 */
106 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4345) }, /* 88E8022 */
107 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4346) }, /* 88E8061 */
108 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4347) }, /* 88E8062 */
109 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4350) }, /* 88E8035 */
110 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4351) }, /* 88E8036 */
111 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4352) }, /* 88E8038 */
112 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4353) }, /* 88E8039 */
113 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4354) }, /* 88E8040 */
114 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4355) }, /* 88E8040T */
115 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4356) }, /* 88EC033 */
116 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4357) }, /* 88E8042 */
117 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x435A) }, /* 88E8048 */
118 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4360) }, /* 88E8052 */
119 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4361) }, /* 88E8050 */
120 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4362) }, /* 88E8053 */
121 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4363) }, /* 88E8055 */
122 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4364) }, /* 88E8056 */
123 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4365) }, /* 88E8070 */
124 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4366) }, /* 88EC036 */
125 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4367) }, /* 88EC032 */
126 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4368) }, /* 88EC034 */
127 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4369) }, /* 88EC042 */
128 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x436A) }, /* 88E8058 */
129 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x436B) }, /* 88E8071 */
130 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x436C) }, /* 88E8072 */
131 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x436D) }, /* 88E8055 */
132 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4370) }, /* 88E8075 */
133 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4380) }, /* 88E8057 */
134 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4381) }, /* 88E8059 */
135 	{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x4382) }, /* 88E8079 */
136 	{ 0 }
137 };
138 
139 MODULE_DEVICE_TABLE(pci, sky2_id_table);
140 
141 /* Avoid conditionals by using array */
142 static const unsigned txqaddr[] = { Q_XA1, Q_XA2 };
143 static const unsigned rxqaddr[] = { Q_R1, Q_R2 };
144 static const u32 portirq_msk[] = { Y2_IS_PORT_1, Y2_IS_PORT_2 };
145 
146 static void sky2_set_multicast(struct net_device *dev);
147 static irqreturn_t sky2_intr(int irq, void *dev_id);
148 
149 /* Access to PHY via serial interconnect */
150 static int gm_phy_write(struct sky2_hw *hw, unsigned port, u16 reg, u16 val)
151 {
152 	int i;
153 
154 	gma_write16(hw, port, GM_SMI_DATA, val);
155 	gma_write16(hw, port, GM_SMI_CTRL,
156 		    GM_SMI_CT_PHY_AD(PHY_ADDR_MARV) | GM_SMI_CT_REG_AD(reg));
157 
158 	for (i = 0; i < PHY_RETRIES; i++) {
159 		u16 ctrl = gma_read16(hw, port, GM_SMI_CTRL);
160 		if (ctrl == 0xffff)
161 			goto io_error;
162 
163 		if (!(ctrl & GM_SMI_CT_BUSY))
164 			return 0;
165 
166 		udelay(10);
167 	}
168 
169 	dev_warn(&hw->pdev->dev, "%s: phy write timeout\n", hw->dev[port]->name);
170 	return -ETIMEDOUT;
171 
172 io_error:
173 	dev_err(&hw->pdev->dev, "%s: phy I/O error\n", hw->dev[port]->name);
174 	return -EIO;
175 }
176 
177 static int __gm_phy_read(struct sky2_hw *hw, unsigned port, u16 reg, u16 *val)
178 {
179 	int i;
180 
181 	gma_write16(hw, port, GM_SMI_CTRL, GM_SMI_CT_PHY_AD(PHY_ADDR_MARV)
182 		    | GM_SMI_CT_REG_AD(reg) | GM_SMI_CT_OP_RD);
183 
184 	for (i = 0; i < PHY_RETRIES; i++) {
185 		u16 ctrl = gma_read16(hw, port, GM_SMI_CTRL);
186 		if (ctrl == 0xffff)
187 			goto io_error;
188 
189 		if (ctrl & GM_SMI_CT_RD_VAL) {
190 			*val = gma_read16(hw, port, GM_SMI_DATA);
191 			return 0;
192 		}
193 
194 		udelay(10);
195 	}
196 
197 	dev_warn(&hw->pdev->dev, "%s: phy read timeout\n", hw->dev[port]->name);
198 	return -ETIMEDOUT;
199 io_error:
200 	dev_err(&hw->pdev->dev, "%s: phy I/O error\n", hw->dev[port]->name);
201 	return -EIO;
202 }
203 
204 static inline u16 gm_phy_read(struct sky2_hw *hw, unsigned port, u16 reg)
205 {
206 	u16 v = 0;
207 	__gm_phy_read(hw, port, reg, &v);
208 	return v;
209 }
210 
211 
212 static void sky2_power_on(struct sky2_hw *hw)
213 {
214 	/* switch power to VCC (WA for VAUX problem) */
215 	sky2_write8(hw, B0_POWER_CTRL,
216 		    PC_VAUX_ENA | PC_VCC_ENA | PC_VAUX_OFF | PC_VCC_ON);
217 
218 	/* disable Core Clock Division, */
219 	sky2_write32(hw, B2_Y2_CLK_CTRL, Y2_CLK_DIV_DIS);
220 
221 	if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > CHIP_REV_YU_XL_A1)
222 		/* enable bits are inverted */
223 		sky2_write8(hw, B2_Y2_CLK_GATE,
224 			    Y2_PCI_CLK_LNK1_DIS | Y2_COR_CLK_LNK1_DIS |
225 			    Y2_CLK_GAT_LNK1_DIS | Y2_PCI_CLK_LNK2_DIS |
226 			    Y2_COR_CLK_LNK2_DIS | Y2_CLK_GAT_LNK2_DIS);
227 	else
228 		sky2_write8(hw, B2_Y2_CLK_GATE, 0);
229 
230 	if (hw->flags & SKY2_HW_ADV_POWER_CTL) {
231 		u32 reg;
232 
233 		sky2_pci_write32(hw, PCI_DEV_REG3, 0);
234 
235 		reg = sky2_pci_read32(hw, PCI_DEV_REG4);
236 		/* set all bits to 0 except bits 15..12 and 8 */
237 		reg &= P_ASPM_CONTROL_MSK;
238 		sky2_pci_write32(hw, PCI_DEV_REG4, reg);
239 
240 		reg = sky2_pci_read32(hw, PCI_DEV_REG5);
241 		/* set all bits to 0 except bits 28 & 27 */
242 		reg &= P_CTL_TIM_VMAIN_AV_MSK;
243 		sky2_pci_write32(hw, PCI_DEV_REG5, reg);
244 
245 		sky2_pci_write32(hw, PCI_CFG_REG_1, 0);
246 
247 		sky2_write16(hw, B0_CTST, Y2_HW_WOL_ON);
248 
249 		/* Enable workaround for dev 4.107 on Yukon-Ultra & Extreme */
250 		reg = sky2_read32(hw, B2_GP_IO);
251 		reg |= GLB_GPIO_STAT_RACE_DIS;
252 		sky2_write32(hw, B2_GP_IO, reg);
253 
254 		sky2_read32(hw, B2_GP_IO);
255 	}
256 
257 	/* Turn on "driver loaded" LED */
258 	sky2_write16(hw, B0_CTST, Y2_LED_STAT_ON);
259 }
260 
261 static void sky2_power_aux(struct sky2_hw *hw)
262 {
263 	if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > CHIP_REV_YU_XL_A1)
264 		sky2_write8(hw, B2_Y2_CLK_GATE, 0);
265 	else
266 		/* enable bits are inverted */
267 		sky2_write8(hw, B2_Y2_CLK_GATE,
268 			    Y2_PCI_CLK_LNK1_DIS | Y2_COR_CLK_LNK1_DIS |
269 			    Y2_CLK_GAT_LNK1_DIS | Y2_PCI_CLK_LNK2_DIS |
270 			    Y2_COR_CLK_LNK2_DIS | Y2_CLK_GAT_LNK2_DIS);
271 
272 	/* switch power to VAUX if supported and PME from D3cold */
273 	if ( (sky2_read32(hw, B0_CTST) & Y2_VAUX_AVAIL) &&
274 	     pci_pme_capable(hw->pdev, PCI_D3cold))
275 		sky2_write8(hw, B0_POWER_CTRL,
276 			    (PC_VAUX_ENA | PC_VCC_ENA |
277 			     PC_VAUX_ON | PC_VCC_OFF));
278 
279 	/* turn off "driver loaded LED" */
280 	sky2_write16(hw, B0_CTST, Y2_LED_STAT_OFF);
281 }
282 
283 static void sky2_gmac_reset(struct sky2_hw *hw, unsigned port)
284 {
285 	u16 reg;
286 
287 	/* disable all GMAC IRQ's */
288 	sky2_write8(hw, SK_REG(port, GMAC_IRQ_MSK), 0);
289 
290 	gma_write16(hw, port, GM_MC_ADDR_H1, 0);	/* clear MC hash */
291 	gma_write16(hw, port, GM_MC_ADDR_H2, 0);
292 	gma_write16(hw, port, GM_MC_ADDR_H3, 0);
293 	gma_write16(hw, port, GM_MC_ADDR_H4, 0);
294 
295 	reg = gma_read16(hw, port, GM_RX_CTRL);
296 	reg |= GM_RXCR_UCF_ENA | GM_RXCR_MCF_ENA;
297 	gma_write16(hw, port, GM_RX_CTRL, reg);
298 }
299 
300 /* flow control to advertise bits */
301 static const u16 copper_fc_adv[] = {
302 	[FC_NONE]	= 0,
303 	[FC_TX]		= PHY_M_AN_ASP,
304 	[FC_RX]		= PHY_M_AN_PC,
305 	[FC_BOTH]	= PHY_M_AN_PC | PHY_M_AN_ASP,
306 };
307 
308 /* flow control to advertise bits when using 1000BaseX */
309 static const u16 fiber_fc_adv[] = {
310 	[FC_NONE] = PHY_M_P_NO_PAUSE_X,
311 	[FC_TX]   = PHY_M_P_ASYM_MD_X,
312 	[FC_RX]	  = PHY_M_P_SYM_MD_X,
313 	[FC_BOTH] = PHY_M_P_BOTH_MD_X,
314 };
315 
316 /* flow control to GMA disable bits */
317 static const u16 gm_fc_disable[] = {
318 	[FC_NONE] = GM_GPCR_FC_RX_DIS | GM_GPCR_FC_TX_DIS,
319 	[FC_TX]	  = GM_GPCR_FC_RX_DIS,
320 	[FC_RX]	  = GM_GPCR_FC_TX_DIS,
321 	[FC_BOTH] = 0,
322 };
323 
324 
325 static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
326 {
327 	struct sky2_port *sky2 = netdev_priv(hw->dev[port]);
328 	u16 ctrl, ct1000, adv, pg, ledctrl, ledover, reg;
329 
330 	if ( (sky2->flags & SKY2_FLAG_AUTO_SPEED) &&
331 	    !(hw->flags & SKY2_HW_NEWER_PHY)) {
332 		u16 ectrl = gm_phy_read(hw, port, PHY_MARV_EXT_CTRL);
333 
334 		ectrl &= ~(PHY_M_EC_M_DSC_MSK | PHY_M_EC_S_DSC_MSK |
335 			   PHY_M_EC_MAC_S_MSK);
336 		ectrl |= PHY_M_EC_MAC_S(MAC_TX_CLK_25_MHZ);
337 
338 		/* on PHY 88E1040 Rev.D0 (and newer) downshift control changed */
339 		if (hw->chip_id == CHIP_ID_YUKON_EC)
340 			/* set downshift counter to 3x and enable downshift */
341 			ectrl |= PHY_M_EC_DSC_2(2) | PHY_M_EC_DOWN_S_ENA;
342 		else
343 			/* set master & slave downshift counter to 1x */
344 			ectrl |= PHY_M_EC_M_DSC(0) | PHY_M_EC_S_DSC(1);
345 
346 		gm_phy_write(hw, port, PHY_MARV_EXT_CTRL, ectrl);
347 	}
348 
349 	ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
350 	if (sky2_is_copper(hw)) {
351 		if (!(hw->flags & SKY2_HW_GIGABIT)) {
352 			/* enable automatic crossover */
353 			ctrl |= PHY_M_PC_MDI_XMODE(PHY_M_PC_ENA_AUTO) >> 1;
354 
355 			if (hw->chip_id == CHIP_ID_YUKON_FE_P &&
356 			    hw->chip_rev == CHIP_REV_YU_FE2_A0) {
357 				u16 spec;
358 
359 				/* Enable Class A driver for FE+ A0 */
360 				spec = gm_phy_read(hw, port, PHY_MARV_FE_SPEC_2);
361 				spec |= PHY_M_FESC_SEL_CL_A;
362 				gm_phy_write(hw, port, PHY_MARV_FE_SPEC_2, spec);
363 			}
364 		} else {
365 			/* disable energy detect */
366 			ctrl &= ~PHY_M_PC_EN_DET_MSK;
367 
368 			/* enable automatic crossover */
369 			ctrl |= PHY_M_PC_MDI_XMODE(PHY_M_PC_ENA_AUTO);
370 
371 			/* downshift on PHY 88E1112 and 88E1149 is changed */
372 			if ( (sky2->flags & SKY2_FLAG_AUTO_SPEED) &&
373 			     (hw->flags & SKY2_HW_NEWER_PHY)) {
374 				/* set downshift counter to 3x and enable downshift */
375 				ctrl &= ~PHY_M_PC_DSC_MSK;
376 				ctrl |= PHY_M_PC_DSC(2) | PHY_M_PC_DOWN_S_ENA;
377 			}
378 		}
379 	} else {
380 		/* workaround for deviation #4.88 (CRC errors) */
381 		/* disable Automatic Crossover */
382 
383 		ctrl &= ~PHY_M_PC_MDIX_MSK;
384 	}
385 
386 	gm_phy_write(hw, port, PHY_MARV_PHY_CTRL, ctrl);
387 
388 	/* special setup for PHY 88E1112 Fiber */
389 	if (hw->chip_id == CHIP_ID_YUKON_XL && (hw->flags & SKY2_HW_FIBRE_PHY)) {
390 		pg = gm_phy_read(hw, port, PHY_MARV_EXT_ADR);
391 
392 		/* Fiber: select 1000BASE-X only mode MAC Specific Ctrl Reg. */
393 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 2);
394 		ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
395 		ctrl &= ~PHY_M_MAC_MD_MSK;
396 		ctrl |= PHY_M_MAC_MODE_SEL(PHY_M_MAC_MD_1000BX);
397 		gm_phy_write(hw, port, PHY_MARV_PHY_CTRL, ctrl);
398 
399 		if (hw->pmd_type  == 'P') {
400 			/* select page 1 to access Fiber registers */
401 			gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 1);
402 
403 			/* for SFP-module set SIGDET polarity to low */
404 			ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
405 			ctrl |= PHY_M_FIB_SIGD_POL;
406 			gm_phy_write(hw, port, PHY_MARV_PHY_CTRL, ctrl);
407 		}
408 
409 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, pg);
410 	}
411 
412 	ctrl = PHY_CT_RESET;
413 	ct1000 = 0;
414 	adv = PHY_AN_CSMA;
415 	reg = 0;
416 
417 	if (sky2->flags & SKY2_FLAG_AUTO_SPEED) {
418 		if (sky2_is_copper(hw)) {
419 			if (sky2->advertising & ADVERTISED_1000baseT_Full)
420 				ct1000 |= PHY_M_1000C_AFD;
421 			if (sky2->advertising & ADVERTISED_1000baseT_Half)
422 				ct1000 |= PHY_M_1000C_AHD;
423 			if (sky2->advertising & ADVERTISED_100baseT_Full)
424 				adv |= PHY_M_AN_100_FD;
425 			if (sky2->advertising & ADVERTISED_100baseT_Half)
426 				adv |= PHY_M_AN_100_HD;
427 			if (sky2->advertising & ADVERTISED_10baseT_Full)
428 				adv |= PHY_M_AN_10_FD;
429 			if (sky2->advertising & ADVERTISED_10baseT_Half)
430 				adv |= PHY_M_AN_10_HD;
431 
432 		} else {	/* special defines for FIBER (88E1040S only) */
433 			if (sky2->advertising & ADVERTISED_1000baseT_Full)
434 				adv |= PHY_M_AN_1000X_AFD;
435 			if (sky2->advertising & ADVERTISED_1000baseT_Half)
436 				adv |= PHY_M_AN_1000X_AHD;
437 		}
438 
439 		/* Restart Auto-negotiation */
440 		ctrl |= PHY_CT_ANE | PHY_CT_RE_CFG;
441 	} else {
442 		/* forced speed/duplex settings */
443 		ct1000 = PHY_M_1000C_MSE;
444 
445 		/* Disable auto update for duplex flow control and duplex */
446 		reg |= GM_GPCR_AU_DUP_DIS | GM_GPCR_AU_SPD_DIS;
447 
448 		switch (sky2->speed) {
449 		case SPEED_1000:
450 			ctrl |= PHY_CT_SP1000;
451 			reg |= GM_GPCR_SPEED_1000;
452 			break;
453 		case SPEED_100:
454 			ctrl |= PHY_CT_SP100;
455 			reg |= GM_GPCR_SPEED_100;
456 			break;
457 		}
458 
459 		if (sky2->duplex == DUPLEX_FULL) {
460 			reg |= GM_GPCR_DUP_FULL;
461 			ctrl |= PHY_CT_DUP_MD;
462 		} else if (sky2->speed < SPEED_1000)
463 			sky2->flow_mode = FC_NONE;
464 	}
465 
466 	if (sky2->flags & SKY2_FLAG_AUTO_PAUSE) {
467 		if (sky2_is_copper(hw))
468 			adv |= copper_fc_adv[sky2->flow_mode];
469 		else
470 			adv |= fiber_fc_adv[sky2->flow_mode];
471 	} else {
472 		reg |= GM_GPCR_AU_FCT_DIS;
473 		reg |= gm_fc_disable[sky2->flow_mode];
474 
475 		/* Forward pause packets to GMAC? */
476 		if (sky2->flow_mode & FC_RX)
477 			sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_ON);
478 		else
479 			sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
480 	}
481 
482 	gma_write16(hw, port, GM_GP_CTRL, reg);
483 
484 	if (hw->flags & SKY2_HW_GIGABIT)
485 		gm_phy_write(hw, port, PHY_MARV_1000T_CTRL, ct1000);
486 
487 	gm_phy_write(hw, port, PHY_MARV_AUNE_ADV, adv);
488 	gm_phy_write(hw, port, PHY_MARV_CTRL, ctrl);
489 
490 	/* Setup Phy LED's */
491 	ledctrl = PHY_M_LED_PULS_DUR(PULS_170MS);
492 	ledover = 0;
493 
494 	switch (hw->chip_id) {
495 	case CHIP_ID_YUKON_FE:
496 		/* on 88E3082 these bits are at 11..9 (shifted left) */
497 		ledctrl |= PHY_M_LED_BLINK_RT(BLINK_84MS) << 1;
498 
499 		ctrl = gm_phy_read(hw, port, PHY_MARV_FE_LED_PAR);
500 
501 		/* delete ACT LED control bits */
502 		ctrl &= ~PHY_M_FELP_LED1_MSK;
503 		/* change ACT LED control to blink mode */
504 		ctrl |= PHY_M_FELP_LED1_CTRL(LED_PAR_CTRL_ACT_BL);
505 		gm_phy_write(hw, port, PHY_MARV_FE_LED_PAR, ctrl);
506 		break;
507 
508 	case CHIP_ID_YUKON_FE_P:
509 		/* Enable Link Partner Next Page */
510 		ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
511 		ctrl |= PHY_M_PC_ENA_LIP_NP;
512 
513 		/* disable Energy Detect and enable scrambler */
514 		ctrl &= ~(PHY_M_PC_ENA_ENE_DT | PHY_M_PC_DIS_SCRAMB);
515 		gm_phy_write(hw, port, PHY_MARV_PHY_CTRL, ctrl);
516 
517 		/* set LED2 -> ACT, LED1 -> LINK, LED0 -> SPEED */
518 		ctrl = PHY_M_FELP_LED2_CTRL(LED_PAR_CTRL_ACT_BL) |
519 			PHY_M_FELP_LED1_CTRL(LED_PAR_CTRL_LINK) |
520 			PHY_M_FELP_LED0_CTRL(LED_PAR_CTRL_SPEED);
521 
522 		gm_phy_write(hw, port, PHY_MARV_FE_LED_PAR, ctrl);
523 		break;
524 
525 	case CHIP_ID_YUKON_XL:
526 		pg = gm_phy_read(hw, port, PHY_MARV_EXT_ADR);
527 
528 		/* select page 3 to access LED control register */
529 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 3);
530 
531 		/* set LED Function Control register */
532 		gm_phy_write(hw, port, PHY_MARV_PHY_CTRL,
533 			     (PHY_M_LEDC_LOS_CTRL(1) |	/* LINK/ACT */
534 			      PHY_M_LEDC_INIT_CTRL(7) |	/* 10 Mbps */
535 			      PHY_M_LEDC_STA1_CTRL(7) |	/* 100 Mbps */
536 			      PHY_M_LEDC_STA0_CTRL(7)));	/* 1000 Mbps */
537 
538 		/* set Polarity Control register */
539 		gm_phy_write(hw, port, PHY_MARV_PHY_STAT,
540 			     (PHY_M_POLC_LS1_P_MIX(4) |
541 			      PHY_M_POLC_IS0_P_MIX(4) |
542 			      PHY_M_POLC_LOS_CTRL(2) |
543 			      PHY_M_POLC_INIT_CTRL(2) |
544 			      PHY_M_POLC_STA1_CTRL(2) |
545 			      PHY_M_POLC_STA0_CTRL(2)));
546 
547 		/* restore page register */
548 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, pg);
549 		break;
550 
551 	case CHIP_ID_YUKON_EC_U:
552 	case CHIP_ID_YUKON_EX:
553 	case CHIP_ID_YUKON_SUPR:
554 		pg = gm_phy_read(hw, port, PHY_MARV_EXT_ADR);
555 
556 		/* select page 3 to access LED control register */
557 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 3);
558 
559 		/* set LED Function Control register */
560 		gm_phy_write(hw, port, PHY_MARV_PHY_CTRL,
561 			     (PHY_M_LEDC_LOS_CTRL(1) |	/* LINK/ACT */
562 			      PHY_M_LEDC_INIT_CTRL(8) |	/* 10 Mbps */
563 			      PHY_M_LEDC_STA1_CTRL(7) |	/* 100 Mbps */
564 			      PHY_M_LEDC_STA0_CTRL(7)));/* 1000 Mbps */
565 
566 		/* set Blink Rate in LED Timer Control Register */
567 		gm_phy_write(hw, port, PHY_MARV_INT_MASK,
568 			     ledctrl | PHY_M_LED_BLINK_RT(BLINK_84MS));
569 		/* restore page register */
570 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, pg);
571 		break;
572 
573 	default:
574 		/* set Tx LED (LED_TX) to blink mode on Rx OR Tx activity */
575 		ledctrl |= PHY_M_LED_BLINK_RT(BLINK_84MS) | PHY_M_LEDC_TX_CTRL;
576 
577 		/* turn off the Rx LED (LED_RX) */
578 		ledover |= PHY_M_LED_MO_RX(MO_LED_OFF);
579 	}
580 
581 	if (hw->chip_id == CHIP_ID_YUKON_EC_U || hw->chip_id == CHIP_ID_YUKON_UL_2) {
582 		/* apply fixes in PHY AFE */
583 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 255);
584 
585 		/* increase differential signal amplitude in 10BASE-T */
586 		gm_phy_write(hw, port, 0x18, 0xaa99);
587 		gm_phy_write(hw, port, 0x17, 0x2011);
588 
589 		if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
590 			/* fix for IEEE A/B Symmetry failure in 1000BASE-T */
591 			gm_phy_write(hw, port, 0x18, 0xa204);
592 			gm_phy_write(hw, port, 0x17, 0x2002);
593 		}
594 
595 		/* set page register to 0 */
596 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0);
597 	} else if (hw->chip_id == CHIP_ID_YUKON_FE_P &&
598 		   hw->chip_rev == CHIP_REV_YU_FE2_A0) {
599 		/* apply workaround for integrated resistors calibration */
600 		gm_phy_write(hw, port, PHY_MARV_PAGE_ADDR, 17);
601 		gm_phy_write(hw, port, PHY_MARV_PAGE_DATA, 0x3f60);
602 	} else if (hw->chip_id == CHIP_ID_YUKON_OPT && hw->chip_rev == 0) {
603 		/* apply fixes in PHY AFE */
604 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0x00ff);
605 
606 		/* apply RDAC termination workaround */
607 		gm_phy_write(hw, port, 24, 0x2800);
608 		gm_phy_write(hw, port, 23, 0x2001);
609 
610 		/* set page register back to 0 */
611 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0);
612 	} else if (hw->chip_id != CHIP_ID_YUKON_EX &&
613 		   hw->chip_id < CHIP_ID_YUKON_SUPR) {
614 		/* no effect on Yukon-XL */
615 		gm_phy_write(hw, port, PHY_MARV_LED_CTRL, ledctrl);
616 
617 		if (!(sky2->flags & SKY2_FLAG_AUTO_SPEED) ||
618 		    sky2->speed == SPEED_100) {
619 			/* turn on 100 Mbps LED (LED_LINK100) */
620 			ledover |= PHY_M_LED_MO_100(MO_LED_ON);
621 		}
622 
623 		if (ledover)
624 			gm_phy_write(hw, port, PHY_MARV_LED_OVER, ledover);
625 
626 	} else if (hw->chip_id == CHIP_ID_YUKON_PRM &&
627 		   (sky2_read8(hw, B2_MAC_CFG) & 0xf) == 0x7) {
628 		int i;
629 		/* This a phy register setup workaround copied from vendor driver. */
630 		static const struct {
631 			u16 reg, val;
632 		} eee_afe[] = {
633 			{ 0x156, 0x58ce },
634 			{ 0x153, 0x99eb },
635 			{ 0x141, 0x8064 },
636 			/* { 0x155, 0x130b },*/
637 			{ 0x000, 0x0000 },
638 			{ 0x151, 0x8433 },
639 			{ 0x14b, 0x8c44 },
640 			{ 0x14c, 0x0f90 },
641 			{ 0x14f, 0x39aa },
642 			/* { 0x154, 0x2f39 },*/
643 			{ 0x14d, 0xba33 },
644 			{ 0x144, 0x0048 },
645 			{ 0x152, 0x2010 },
646 			/* { 0x158, 0x1223 },*/
647 			{ 0x140, 0x4444 },
648 			{ 0x154, 0x2f3b },
649 			{ 0x158, 0xb203 },
650 			{ 0x157, 0x2029 },
651 		};
652 
653 		/* Start Workaround for OptimaEEE Rev.Z0 */
654 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0x00fb);
655 
656 		gm_phy_write(hw, port,  1, 0x4099);
657 		gm_phy_write(hw, port,  3, 0x1120);
658 		gm_phy_write(hw, port, 11, 0x113c);
659 		gm_phy_write(hw, port, 14, 0x8100);
660 		gm_phy_write(hw, port, 15, 0x112a);
661 		gm_phy_write(hw, port, 17, 0x1008);
662 
663 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0x00fc);
664 		gm_phy_write(hw, port,  1, 0x20b0);
665 
666 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0x00ff);
667 
668 		for (i = 0; i < ARRAY_SIZE(eee_afe); i++) {
669 			/* apply AFE settings */
670 			gm_phy_write(hw, port, 17, eee_afe[i].val);
671 			gm_phy_write(hw, port, 16, eee_afe[i].reg | 1u<<13);
672 		}
673 
674 		/* End Workaround for OptimaEEE */
675 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0);
676 
677 		/* Enable 10Base-Te (EEE) */
678 		if (hw->chip_id >= CHIP_ID_YUKON_PRM) {
679 			reg = gm_phy_read(hw, port, PHY_MARV_EXT_CTRL);
680 			gm_phy_write(hw, port, PHY_MARV_EXT_CTRL,
681 				     reg | PHY_M_10B_TE_ENABLE);
682 		}
683 	}
684 
685 	/* Enable phy interrupt on auto-negotiation complete (or link up) */
686 	if (sky2->flags & SKY2_FLAG_AUTO_SPEED)
687 		gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_IS_AN_COMPL);
688 	else
689 		gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_DEF_MSK);
690 }
691 
692 static const u32 phy_power[] = { PCI_Y2_PHY1_POWD, PCI_Y2_PHY2_POWD };
693 static const u32 coma_mode[] = { PCI_Y2_PHY1_COMA, PCI_Y2_PHY2_COMA };
694 
695 static void sky2_phy_power_up(struct sky2_hw *hw, unsigned port)
696 {
697 	u32 reg1;
698 
699 	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
700 	reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
701 	reg1 &= ~phy_power[port];
702 
703 	if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > CHIP_REV_YU_XL_A1)
704 		reg1 |= coma_mode[port];
705 
706 	sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
707 	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
708 	sky2_pci_read32(hw, PCI_DEV_REG1);
709 
710 	if (hw->chip_id == CHIP_ID_YUKON_FE)
711 		gm_phy_write(hw, port, PHY_MARV_CTRL, PHY_CT_ANE);
712 	else if (hw->flags & SKY2_HW_ADV_POWER_CTL)
713 		sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_CLR);
714 }
715 
716 static void sky2_phy_power_down(struct sky2_hw *hw, unsigned port)
717 {
718 	u32 reg1;
719 	u16 ctrl;
720 
721 	/* release GPHY Control reset */
722 	sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_CLR);
723 
724 	/* release GMAC reset */
725 	sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_RST_CLR);
726 
727 	if (hw->flags & SKY2_HW_NEWER_PHY) {
728 		/* select page 2 to access MAC control register */
729 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 2);
730 
731 		ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
732 		/* allow GMII Power Down */
733 		ctrl &= ~PHY_M_MAC_GMIF_PUP;
734 		gm_phy_write(hw, port, PHY_MARV_PHY_CTRL, ctrl);
735 
736 		/* set page register back to 0 */
737 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0);
738 	}
739 
740 	/* setup General Purpose Control Register */
741 	gma_write16(hw, port, GM_GP_CTRL,
742 		    GM_GPCR_FL_PASS | GM_GPCR_SPEED_100 |
743 		    GM_GPCR_AU_DUP_DIS | GM_GPCR_AU_FCT_DIS |
744 		    GM_GPCR_AU_SPD_DIS);
745 
746 	if (hw->chip_id != CHIP_ID_YUKON_EC) {
747 		if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
748 			/* select page 2 to access MAC control register */
749 			gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 2);
750 
751 			ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
752 			/* enable Power Down */
753 			ctrl |= PHY_M_PC_POW_D_ENA;
754 			gm_phy_write(hw, port, PHY_MARV_PHY_CTRL, ctrl);
755 
756 			/* set page register back to 0 */
757 			gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 0);
758 		}
759 
760 		/* set IEEE compatible Power Down Mode (dev. #4.99) */
761 		gm_phy_write(hw, port, PHY_MARV_CTRL, PHY_CT_PDOWN);
762 	}
763 
764 	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
765 	reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
766 	reg1 |= phy_power[port];		/* set PHY to PowerDown/COMA Mode */
767 	sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
768 	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
769 }
770 
771 /* configure IPG according to used link speed */
772 static void sky2_set_ipg(struct sky2_port *sky2)
773 {
774 	u16 reg;
775 
776 	reg = gma_read16(sky2->hw, sky2->port, GM_SERIAL_MODE);
777 	reg &= ~GM_SMOD_IPG_MSK;
778 	if (sky2->speed > SPEED_100)
779 		reg |= IPG_DATA_VAL(IPG_DATA_DEF_1000);
780 	else
781 		reg |= IPG_DATA_VAL(IPG_DATA_DEF_10_100);
782 	gma_write16(sky2->hw, sky2->port, GM_SERIAL_MODE, reg);
783 }
784 
785 /* Enable Rx/Tx */
786 static void sky2_enable_rx_tx(struct sky2_port *sky2)
787 {
788 	struct sky2_hw *hw = sky2->hw;
789 	unsigned port = sky2->port;
790 	u16 reg;
791 
792 	reg = gma_read16(hw, port, GM_GP_CTRL);
793 	reg |= GM_GPCR_RX_ENA | GM_GPCR_TX_ENA;
794 	gma_write16(hw, port, GM_GP_CTRL, reg);
795 }
796 
797 /* Force a renegotiation */
798 static void sky2_phy_reinit(struct sky2_port *sky2)
799 {
800 	spin_lock_bh(&sky2->phy_lock);
801 	sky2_phy_init(sky2->hw, sky2->port);
802 	sky2_enable_rx_tx(sky2);
803 	spin_unlock_bh(&sky2->phy_lock);
804 }
805 
806 /* Put device in state to listen for Wake On Lan */
807 static void sky2_wol_init(struct sky2_port *sky2)
808 {
809 	struct sky2_hw *hw = sky2->hw;
810 	unsigned port = sky2->port;
811 	enum flow_control save_mode;
812 	u16 ctrl;
813 
814 	/* Bring hardware out of reset */
815 	sky2_write16(hw, B0_CTST, CS_RST_CLR);
816 	sky2_write16(hw, SK_REG(port, GMAC_LINK_CTRL), GMLC_RST_CLR);
817 
818 	sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_CLR);
819 	sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_RST_CLR);
820 
821 	/* Force to 10/100
822 	 * sky2_reset will re-enable on resume
823 	 */
824 	save_mode = sky2->flow_mode;
825 	ctrl = sky2->advertising;
826 
827 	sky2->advertising &= ~(ADVERTISED_1000baseT_Half|ADVERTISED_1000baseT_Full);
828 	sky2->flow_mode = FC_NONE;
829 
830 	spin_lock_bh(&sky2->phy_lock);
831 	sky2_phy_power_up(hw, port);
832 	sky2_phy_init(hw, port);
833 	spin_unlock_bh(&sky2->phy_lock);
834 
835 	sky2->flow_mode = save_mode;
836 	sky2->advertising = ctrl;
837 
838 	/* Set GMAC to no flow control and auto update for speed/duplex */
839 	gma_write16(hw, port, GM_GP_CTRL,
840 		    GM_GPCR_FC_TX_DIS|GM_GPCR_TX_ENA|GM_GPCR_RX_ENA|
841 		    GM_GPCR_DUP_FULL|GM_GPCR_FC_RX_DIS|GM_GPCR_AU_FCT_DIS);
842 
843 	/* Set WOL address */
844 	memcpy_toio(hw->regs + WOL_REGS(port, WOL_MAC_ADDR),
845 		    sky2->netdev->dev_addr, ETH_ALEN);
846 
847 	/* Turn on appropriate WOL control bits */
848 	sky2_write16(hw, WOL_REGS(port, WOL_CTRL_STAT), WOL_CTL_CLEAR_RESULT);
849 	ctrl = 0;
850 	if (sky2->wol & WAKE_PHY)
851 		ctrl |= WOL_CTL_ENA_PME_ON_LINK_CHG|WOL_CTL_ENA_LINK_CHG_UNIT;
852 	else
853 		ctrl |= WOL_CTL_DIS_PME_ON_LINK_CHG|WOL_CTL_DIS_LINK_CHG_UNIT;
854 
855 	if (sky2->wol & WAKE_MAGIC)
856 		ctrl |= WOL_CTL_ENA_PME_ON_MAGIC_PKT|WOL_CTL_ENA_MAGIC_PKT_UNIT;
857 	else
858 		ctrl |= WOL_CTL_DIS_PME_ON_MAGIC_PKT|WOL_CTL_DIS_MAGIC_PKT_UNIT;
859 
860 	ctrl |= WOL_CTL_DIS_PME_ON_PATTERN|WOL_CTL_DIS_PATTERN_UNIT;
861 	sky2_write16(hw, WOL_REGS(port, WOL_CTRL_STAT), ctrl);
862 
863 	/* Disable PiG firmware */
864 	sky2_write16(hw, B0_CTST, Y2_HW_WOL_OFF);
865 
866 	/* Needed by some broken BIOSes, use PCI rather than PCI-e for WOL */
867 	if (legacy_pme) {
868 		u32 reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
869 		reg1 |= PCI_Y2_PME_LEGACY;
870 		sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
871 	}
872 
873 	/* block receiver */
874 	sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET);
875 	sky2_read32(hw, B0_CTST);
876 }
877 
878 static void sky2_set_tx_stfwd(struct sky2_hw *hw, unsigned port)
879 {
880 	struct net_device *dev = hw->dev[port];
881 
882 	if ( (hw->chip_id == CHIP_ID_YUKON_EX &&
883 	      hw->chip_rev != CHIP_REV_YU_EX_A0) ||
884 	     hw->chip_id >= CHIP_ID_YUKON_FE_P) {
885 		/* Yukon-Extreme B0 and further Extreme devices */
886 		sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T), TX_STFW_ENA);
887 	} else if (dev->mtu > ETH_DATA_LEN) {
888 		/* set Tx GMAC FIFO Almost Empty Threshold */
889 		sky2_write32(hw, SK_REG(port, TX_GMF_AE_THR),
890 			     (ECU_JUMBO_WM << 16) | ECU_AE_THR);
891 
892 		sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T), TX_STFW_DIS);
893 	} else
894 		sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T), TX_STFW_ENA);
895 }
896 
897 static void sky2_mac_init(struct sky2_hw *hw, unsigned port)
898 {
899 	struct sky2_port *sky2 = netdev_priv(hw->dev[port]);
900 	u16 reg;
901 	u32 rx_reg;
902 	int i;
903 	const u8 *addr = hw->dev[port]->dev_addr;
904 
905 	sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_SET);
906 	sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_CLR);
907 
908 	sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_RST_CLR);
909 
910 	if (hw->chip_id == CHIP_ID_YUKON_XL &&
911 	    hw->chip_rev == CHIP_REV_YU_XL_A0 &&
912 	    port == 1) {
913 		/* WA DEV_472 -- looks like crossed wires on port 2 */
914 		/* clear GMAC 1 Control reset */
915 		sky2_write8(hw, SK_REG(0, GMAC_CTRL), GMC_RST_CLR);
916 		do {
917 			sky2_write8(hw, SK_REG(1, GMAC_CTRL), GMC_RST_SET);
918 			sky2_write8(hw, SK_REG(1, GMAC_CTRL), GMC_RST_CLR);
919 		} while (gm_phy_read(hw, 1, PHY_MARV_ID0) != PHY_MARV_ID0_VAL ||
920 			 gm_phy_read(hw, 1, PHY_MARV_ID1) != PHY_MARV_ID1_Y2 ||
921 			 gm_phy_read(hw, 1, PHY_MARV_INT_MASK) != 0);
922 	}
923 
924 	sky2_read16(hw, SK_REG(port, GMAC_IRQ_SRC));
925 
926 	/* Enable Transmit FIFO Underrun */
927 	sky2_write8(hw, SK_REG(port, GMAC_IRQ_MSK), GMAC_DEF_MSK);
928 
929 	spin_lock_bh(&sky2->phy_lock);
930 	sky2_phy_power_up(hw, port);
931 	sky2_phy_init(hw, port);
932 	spin_unlock_bh(&sky2->phy_lock);
933 
934 	/* MIB clear */
935 	reg = gma_read16(hw, port, GM_PHY_ADDR);
936 	gma_write16(hw, port, GM_PHY_ADDR, reg | GM_PAR_MIB_CLR);
937 
938 	for (i = GM_MIB_CNT_BASE; i <= GM_MIB_CNT_END; i += 4)
939 		gma_read16(hw, port, i);
940 	gma_write16(hw, port, GM_PHY_ADDR, reg);
941 
942 	/* transmit control */
943 	gma_write16(hw, port, GM_TX_CTRL, TX_COL_THR(TX_COL_DEF));
944 
945 	/* receive control reg: unicast + multicast + no FCS  */
946 	gma_write16(hw, port, GM_RX_CTRL,
947 		    GM_RXCR_UCF_ENA | GM_RXCR_CRC_DIS | GM_RXCR_MCF_ENA);
948 
949 	/* transmit flow control */
950 	gma_write16(hw, port, GM_TX_FLOW_CTRL, 0xffff);
951 
952 	/* transmit parameter */
953 	gma_write16(hw, port, GM_TX_PARAM,
954 		    TX_JAM_LEN_VAL(TX_JAM_LEN_DEF) |
955 		    TX_JAM_IPG_VAL(TX_JAM_IPG_DEF) |
956 		    TX_IPG_JAM_DATA(TX_IPG_JAM_DEF) |
957 		    TX_BACK_OFF_LIM(TX_BOF_LIM_DEF));
958 
959 	/* serial mode register */
960 	reg = DATA_BLIND_VAL(DATA_BLIND_DEF) |
961 		GM_SMOD_VLAN_ENA | IPG_DATA_VAL(IPG_DATA_DEF_1000);
962 
963 	if (hw->dev[port]->mtu > ETH_DATA_LEN)
964 		reg |= GM_SMOD_JUMBO_ENA;
965 
966 	if (hw->chip_id == CHIP_ID_YUKON_EC_U &&
967 	    hw->chip_rev == CHIP_REV_YU_EC_U_B1)
968 		reg |= GM_NEW_FLOW_CTRL;
969 
970 	gma_write16(hw, port, GM_SERIAL_MODE, reg);
971 
972 	/* virtual address for data */
973 	gma_set_addr(hw, port, GM_SRC_ADDR_2L, addr);
974 
975 	/* physical address: used for pause frames */
976 	gma_set_addr(hw, port, GM_SRC_ADDR_1L, addr);
977 
978 	/* ignore counter overflows */
979 	gma_write16(hw, port, GM_TX_IRQ_MSK, 0);
980 	gma_write16(hw, port, GM_RX_IRQ_MSK, 0);
981 	gma_write16(hw, port, GM_TR_IRQ_MSK, 0);
982 
983 	/* Configure Rx MAC FIFO */
984 	sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_CLR);
985 	rx_reg = GMF_OPER_ON | GMF_RX_F_FL_ON;
986 	if (hw->chip_id == CHIP_ID_YUKON_EX ||
987 	    hw->chip_id == CHIP_ID_YUKON_FE_P)
988 		rx_reg |= GMF_RX_OVER_ON;
989 
990 	sky2_write32(hw, SK_REG(port, RX_GMF_CTRL_T), rx_reg);
991 
992 	if (hw->chip_id == CHIP_ID_YUKON_XL) {
993 		/* Hardware errata - clear flush mask */
994 		sky2_write16(hw, SK_REG(port, RX_GMF_FL_MSK), 0);
995 	} else {
996 		/* Flush Rx MAC FIFO on any flow control or error */
997 		sky2_write16(hw, SK_REG(port, RX_GMF_FL_MSK), GMR_FS_ANY_ERR);
998 	}
999 
1000 	/* Set threshold to 0xa (64 bytes) + 1 to workaround pause bug  */
1001 	reg = RX_GMF_FL_THR_DEF + 1;
1002 	/* Another magic mystery workaround from sk98lin */
1003 	if (hw->chip_id == CHIP_ID_YUKON_FE_P &&
1004 	    hw->chip_rev == CHIP_REV_YU_FE2_A0)
1005 		reg = 0x178;
1006 	sky2_write16(hw, SK_REG(port, RX_GMF_FL_THR), reg);
1007 
1008 	/* Configure Tx MAC FIFO */
1009 	sky2_write8(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_RST_CLR);
1010 	sky2_write16(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_OPER_ON);
1011 
1012 	/* On chips without ram buffer, pause is controlled by MAC level */
1013 	if (!(hw->flags & SKY2_HW_RAM_BUFFER)) {
1014 		/* Pause threshold is scaled by 8 in bytes */
1015 		if (hw->chip_id == CHIP_ID_YUKON_FE_P &&
1016 		    hw->chip_rev == CHIP_REV_YU_FE2_A0)
1017 			reg = 1568 / 8;
1018 		else
1019 			reg = 1024 / 8;
1020 		sky2_write16(hw, SK_REG(port, RX_GMF_UP_THR), reg);
1021 		sky2_write16(hw, SK_REG(port, RX_GMF_LP_THR), 768 / 8);
1022 
1023 		sky2_set_tx_stfwd(hw, port);
1024 	}
1025 
1026 	if (hw->chip_id == CHIP_ID_YUKON_FE_P &&
1027 	    hw->chip_rev == CHIP_REV_YU_FE2_A0) {
1028 		/* disable dynamic watermark */
1029 		reg = sky2_read16(hw, SK_REG(port, TX_GMF_EA));
1030 		reg &= ~TX_DYN_WM_ENA;
1031 		sky2_write16(hw, SK_REG(port, TX_GMF_EA), reg);
1032 	}
1033 }
1034 
1035 /* Assign Ram Buffer allocation to queue */
1036 static void sky2_ramset(struct sky2_hw *hw, u16 q, u32 start, u32 space)
1037 {
1038 	u32 end;
1039 
1040 	/* convert from K bytes to qwords used for hw register */
1041 	start *= 1024/8;
1042 	space *= 1024/8;
1043 	end = start + space - 1;
1044 
1045 	sky2_write8(hw, RB_ADDR(q, RB_CTRL), RB_RST_CLR);
1046 	sky2_write32(hw, RB_ADDR(q, RB_START), start);
1047 	sky2_write32(hw, RB_ADDR(q, RB_END), end);
1048 	sky2_write32(hw, RB_ADDR(q, RB_WP), start);
1049 	sky2_write32(hw, RB_ADDR(q, RB_RP), start);
1050 
1051 	if (q == Q_R1 || q == Q_R2) {
1052 		u32 tp = space - space/4;
1053 
1054 		/* On receive queue's set the thresholds
1055 		 * give receiver priority when > 3/4 full
1056 		 * send pause when down to 2K
1057 		 */
1058 		sky2_write32(hw, RB_ADDR(q, RB_RX_UTHP), tp);
1059 		sky2_write32(hw, RB_ADDR(q, RB_RX_LTHP), space/2);
1060 
1061 		tp = space - 8192/8;
1062 		sky2_write32(hw, RB_ADDR(q, RB_RX_UTPP), tp);
1063 		sky2_write32(hw, RB_ADDR(q, RB_RX_LTPP), space/4);
1064 	} else {
1065 		/* Enable store & forward on Tx queue's because
1066 		 * Tx FIFO is only 1K on Yukon
1067 		 */
1068 		sky2_write8(hw, RB_ADDR(q, RB_CTRL), RB_ENA_STFWD);
1069 	}
1070 
1071 	sky2_write8(hw, RB_ADDR(q, RB_CTRL), RB_ENA_OP_MD);
1072 	sky2_read8(hw, RB_ADDR(q, RB_CTRL));
1073 }
1074 
1075 /* Setup Bus Memory Interface */
1076 static void sky2_qset(struct sky2_hw *hw, u16 q)
1077 {
1078 	sky2_write32(hw, Q_ADDR(q, Q_CSR), BMU_CLR_RESET);
1079 	sky2_write32(hw, Q_ADDR(q, Q_CSR), BMU_OPER_INIT);
1080 	sky2_write32(hw, Q_ADDR(q, Q_CSR), BMU_FIFO_OP_ON);
1081 	sky2_write32(hw, Q_ADDR(q, Q_WM),  BMU_WM_DEFAULT);
1082 }
1083 
1084 /* Setup prefetch unit registers. This is the interface between
1085  * hardware and driver list elements
1086  */
1087 static void sky2_prefetch_init(struct sky2_hw *hw, u32 qaddr,
1088 			       dma_addr_t addr, u32 last)
1089 {
1090 	sky2_write32(hw, Y2_QADDR(qaddr, PREF_UNIT_CTRL), PREF_UNIT_RST_SET);
1091 	sky2_write32(hw, Y2_QADDR(qaddr, PREF_UNIT_CTRL), PREF_UNIT_RST_CLR);
1092 	sky2_write32(hw, Y2_QADDR(qaddr, PREF_UNIT_ADDR_HI), upper_32_bits(addr));
1093 	sky2_write32(hw, Y2_QADDR(qaddr, PREF_UNIT_ADDR_LO), lower_32_bits(addr));
1094 	sky2_write16(hw, Y2_QADDR(qaddr, PREF_UNIT_LAST_IDX), last);
1095 	sky2_write32(hw, Y2_QADDR(qaddr, PREF_UNIT_CTRL), PREF_UNIT_OP_ON);
1096 
1097 	sky2_read32(hw, Y2_QADDR(qaddr, PREF_UNIT_CTRL));
1098 }
1099 
1100 static inline struct sky2_tx_le *get_tx_le(struct sky2_port *sky2, u16 *slot)
1101 {
1102 	struct sky2_tx_le *le = sky2->tx_le + *slot;
1103 
1104 	*slot = RING_NEXT(*slot, sky2->tx_ring_size);
1105 	le->ctrl = 0;
1106 	return le;
1107 }
1108 
1109 static void tx_init(struct sky2_port *sky2)
1110 {
1111 	struct sky2_tx_le *le;
1112 
1113 	sky2->tx_prod = sky2->tx_cons = 0;
1114 	sky2->tx_tcpsum = 0;
1115 	sky2->tx_last_mss = 0;
1116 	netdev_reset_queue(sky2->netdev);
1117 
1118 	le = get_tx_le(sky2, &sky2->tx_prod);
1119 	le->addr = 0;
1120 	le->opcode = OP_ADDR64 | HW_OWNER;
1121 	sky2->tx_last_upper = 0;
1122 }
1123 
1124 /* Update chip's next pointer */
1125 static inline void sky2_put_idx(struct sky2_hw *hw, unsigned q, u16 idx)
1126 {
1127 	/* Make sure write' to descriptors are complete before we tell hardware */
1128 	wmb();
1129 	sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX), idx);
1130 }
1131 
1132 
1133 static inline struct sky2_rx_le *sky2_next_rx(struct sky2_port *sky2)
1134 {
1135 	struct sky2_rx_le *le = sky2->rx_le + sky2->rx_put;
1136 	sky2->rx_put = RING_NEXT(sky2->rx_put, RX_LE_SIZE);
1137 	le->ctrl = 0;
1138 	return le;
1139 }
1140 
1141 static unsigned sky2_get_rx_threshold(struct sky2_port *sky2)
1142 {
1143 	unsigned size;
1144 
1145 	/* Space needed for frame data + headers rounded up */
1146 	size = roundup(sky2->netdev->mtu + ETH_HLEN + VLAN_HLEN, 8);
1147 
1148 	/* Stopping point for hardware truncation */
1149 	return (size - 8) / sizeof(u32);
1150 }
1151 
1152 static unsigned sky2_get_rx_data_size(struct sky2_port *sky2)
1153 {
1154 	struct rx_ring_info *re;
1155 	unsigned size;
1156 
1157 	/* Space needed for frame data + headers rounded up */
1158 	size = roundup(sky2->netdev->mtu + ETH_HLEN + VLAN_HLEN, 8);
1159 
1160 	sky2->rx_nfrags = size >> PAGE_SHIFT;
1161 	BUG_ON(sky2->rx_nfrags > ARRAY_SIZE(re->frag_addr));
1162 
1163 	/* Compute residue after pages */
1164 	size -= sky2->rx_nfrags << PAGE_SHIFT;
1165 
1166 	/* Optimize to handle small packets and headers */
1167 	if (size < copybreak)
1168 		size = copybreak;
1169 	if (size < ETH_HLEN)
1170 		size = ETH_HLEN;
1171 
1172 	return size;
1173 }
1174 
1175 /* Build description to hardware for one receive segment */
1176 static void sky2_rx_add(struct sky2_port *sky2, u8 op,
1177 			dma_addr_t map, unsigned len)
1178 {
1179 	struct sky2_rx_le *le;
1180 
1181 	if (sizeof(dma_addr_t) > sizeof(u32)) {
1182 		le = sky2_next_rx(sky2);
1183 		le->addr = cpu_to_le32(upper_32_bits(map));
1184 		le->opcode = OP_ADDR64 | HW_OWNER;
1185 	}
1186 
1187 	le = sky2_next_rx(sky2);
1188 	le->addr = cpu_to_le32(lower_32_bits(map));
1189 	le->length = cpu_to_le16(len);
1190 	le->opcode = op | HW_OWNER;
1191 }
1192 
1193 /* Build description to hardware for one possibly fragmented skb */
1194 static void sky2_rx_submit(struct sky2_port *sky2,
1195 			   const struct rx_ring_info *re)
1196 {
1197 	int i;
1198 
1199 	sky2_rx_add(sky2, OP_PACKET, re->data_addr, sky2->rx_data_size);
1200 
1201 	for (i = 0; i < skb_shinfo(re->skb)->nr_frags; i++)
1202 		sky2_rx_add(sky2, OP_BUFFER, re->frag_addr[i], PAGE_SIZE);
1203 }
1204 
1205 
1206 static int sky2_rx_map_skb(struct pci_dev *pdev, struct rx_ring_info *re,
1207 			    unsigned size)
1208 {
1209 	struct sk_buff *skb = re->skb;
1210 	int i;
1211 
1212 	re->data_addr = dma_map_single(&pdev->dev, skb->data, size,
1213 				       DMA_FROM_DEVICE);
1214 	if (dma_mapping_error(&pdev->dev, re->data_addr))
1215 		goto mapping_error;
1216 
1217 	dma_unmap_len_set(re, data_size, size);
1218 
1219 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1220 		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1221 
1222 		re->frag_addr[i] = skb_frag_dma_map(&pdev->dev, frag, 0,
1223 						    skb_frag_size(frag),
1224 						    DMA_FROM_DEVICE);
1225 
1226 		if (dma_mapping_error(&pdev->dev, re->frag_addr[i]))
1227 			goto map_page_error;
1228 	}
1229 	return 0;
1230 
1231 map_page_error:
1232 	while (--i >= 0) {
1233 		dma_unmap_page(&pdev->dev, re->frag_addr[i],
1234 			       skb_frag_size(&skb_shinfo(skb)->frags[i]),
1235 			       DMA_FROM_DEVICE);
1236 	}
1237 
1238 	dma_unmap_single(&pdev->dev, re->data_addr,
1239 			 dma_unmap_len(re, data_size), DMA_FROM_DEVICE);
1240 
1241 mapping_error:
1242 	if (net_ratelimit())
1243 		dev_warn(&pdev->dev, "%s: rx mapping error\n",
1244 			 skb->dev->name);
1245 	return -EIO;
1246 }
1247 
1248 static void sky2_rx_unmap_skb(struct pci_dev *pdev, struct rx_ring_info *re)
1249 {
1250 	struct sk_buff *skb = re->skb;
1251 	int i;
1252 
1253 	dma_unmap_single(&pdev->dev, re->data_addr,
1254 			 dma_unmap_len(re, data_size), DMA_FROM_DEVICE);
1255 
1256 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
1257 		dma_unmap_page(&pdev->dev, re->frag_addr[i],
1258 			       skb_frag_size(&skb_shinfo(skb)->frags[i]),
1259 			       DMA_FROM_DEVICE);
1260 }
1261 
1262 /* Tell chip where to start receive checksum.
1263  * Actually has two checksums, but set both same to avoid possible byte
1264  * order problems.
1265  */
1266 static void rx_set_checksum(struct sky2_port *sky2)
1267 {
1268 	struct sky2_rx_le *le = sky2_next_rx(sky2);
1269 
1270 	le->addr = cpu_to_le32((ETH_HLEN << 16) | ETH_HLEN);
1271 	le->ctrl = 0;
1272 	le->opcode = OP_TCPSTART | HW_OWNER;
1273 
1274 	sky2_write32(sky2->hw,
1275 		     Q_ADDR(rxqaddr[sky2->port], Q_CSR),
1276 		     (sky2->netdev->features & NETIF_F_RXCSUM)
1277 		     ? BMU_ENA_RX_CHKSUM : BMU_DIS_RX_CHKSUM);
1278 }
1279 
1280 /* Enable/disable receive hash calculation (RSS) */
1281 static void rx_set_rss(struct net_device *dev, netdev_features_t features)
1282 {
1283 	struct sky2_port *sky2 = netdev_priv(dev);
1284 	struct sky2_hw *hw = sky2->hw;
1285 	int i, nkeys = 4;
1286 
1287 	/* Supports IPv6 and other modes */
1288 	if (hw->flags & SKY2_HW_NEW_LE) {
1289 		nkeys = 10;
1290 		sky2_write32(hw, SK_REG(sky2->port, RSS_CFG), HASH_ALL);
1291 	}
1292 
1293 	/* Program RSS initial values */
1294 	if (features & NETIF_F_RXHASH) {
1295 		u32 rss_key[10];
1296 
1297 		netdev_rss_key_fill(rss_key, sizeof(rss_key));
1298 		for (i = 0; i < nkeys; i++)
1299 			sky2_write32(hw, SK_REG(sky2->port, RSS_KEY + i * 4),
1300 				     rss_key[i]);
1301 
1302 		/* Need to turn on (undocumented) flag to make hashing work  */
1303 		sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T),
1304 			     RX_STFW_ENA);
1305 
1306 		sky2_write32(hw, Q_ADDR(rxqaddr[sky2->port], Q_CSR),
1307 			     BMU_ENA_RX_RSS_HASH);
1308 	} else
1309 		sky2_write32(hw, Q_ADDR(rxqaddr[sky2->port], Q_CSR),
1310 			     BMU_DIS_RX_RSS_HASH);
1311 }
1312 
1313 /*
1314  * The RX Stop command will not work for Yukon-2 if the BMU does not
1315  * reach the end of packet and since we can't make sure that we have
1316  * incoming data, we must reset the BMU while it is not doing a DMA
1317  * transfer. Since it is possible that the RX path is still active,
1318  * the RX RAM buffer will be stopped first, so any possible incoming
1319  * data will not trigger a DMA. After the RAM buffer is stopped, the
1320  * BMU is polled until any DMA in progress is ended and only then it
1321  * will be reset.
1322  */
1323 static void sky2_rx_stop(struct sky2_port *sky2)
1324 {
1325 	struct sky2_hw *hw = sky2->hw;
1326 	unsigned rxq = rxqaddr[sky2->port];
1327 	int i;
1328 
1329 	/* disable the RAM Buffer receive queue */
1330 	sky2_write8(hw, RB_ADDR(rxq, RB_CTRL), RB_DIS_OP_MD);
1331 
1332 	for (i = 0; i < 0xffff; i++)
1333 		if (sky2_read8(hw, RB_ADDR(rxq, Q_RSL))
1334 		    == sky2_read8(hw, RB_ADDR(rxq, Q_RL)))
1335 			goto stopped;
1336 
1337 	netdev_warn(sky2->netdev, "receiver stop failed\n");
1338 stopped:
1339 	sky2_write32(hw, Q_ADDR(rxq, Q_CSR), BMU_RST_SET | BMU_FIFO_RST);
1340 
1341 	/* reset the Rx prefetch unit */
1342 	sky2_write32(hw, Y2_QADDR(rxq, PREF_UNIT_CTRL), PREF_UNIT_RST_SET);
1343 }
1344 
1345 /* Clean out receive buffer area, assumes receiver hardware stopped */
1346 static void sky2_rx_clean(struct sky2_port *sky2)
1347 {
1348 	unsigned i;
1349 
1350 	if (sky2->rx_le)
1351 		memset(sky2->rx_le, 0, RX_LE_BYTES);
1352 
1353 	for (i = 0; i < sky2->rx_pending; i++) {
1354 		struct rx_ring_info *re = sky2->rx_ring + i;
1355 
1356 		if (re->skb) {
1357 			sky2_rx_unmap_skb(sky2->hw->pdev, re);
1358 			kfree_skb(re->skb);
1359 			re->skb = NULL;
1360 		}
1361 	}
1362 }
1363 
1364 /* Basic MII support */
1365 static int sky2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1366 {
1367 	struct mii_ioctl_data *data = if_mii(ifr);
1368 	struct sky2_port *sky2 = netdev_priv(dev);
1369 	struct sky2_hw *hw = sky2->hw;
1370 	int err = -EOPNOTSUPP;
1371 
1372 	if (!netif_running(dev))
1373 		return -ENODEV;	/* Phy still in reset */
1374 
1375 	switch (cmd) {
1376 	case SIOCGMIIPHY:
1377 		data->phy_id = PHY_ADDR_MARV;
1378 
1379 		fallthrough;
1380 	case SIOCGMIIREG: {
1381 		u16 val = 0;
1382 
1383 		spin_lock_bh(&sky2->phy_lock);
1384 		err = __gm_phy_read(hw, sky2->port, data->reg_num & 0x1f, &val);
1385 		spin_unlock_bh(&sky2->phy_lock);
1386 
1387 		data->val_out = val;
1388 		break;
1389 	}
1390 
1391 	case SIOCSMIIREG:
1392 		spin_lock_bh(&sky2->phy_lock);
1393 		err = gm_phy_write(hw, sky2->port, data->reg_num & 0x1f,
1394 				   data->val_in);
1395 		spin_unlock_bh(&sky2->phy_lock);
1396 		break;
1397 	}
1398 	return err;
1399 }
1400 
1401 #define SKY2_VLAN_OFFLOADS (NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO)
1402 
1403 static void sky2_vlan_mode(struct net_device *dev, netdev_features_t features)
1404 {
1405 	struct sky2_port *sky2 = netdev_priv(dev);
1406 	struct sky2_hw *hw = sky2->hw;
1407 	u16 port = sky2->port;
1408 
1409 	if (features & NETIF_F_HW_VLAN_CTAG_RX)
1410 		sky2_write32(hw, SK_REG(port, RX_GMF_CTRL_T),
1411 			     RX_VLAN_STRIP_ON);
1412 	else
1413 		sky2_write32(hw, SK_REG(port, RX_GMF_CTRL_T),
1414 			     RX_VLAN_STRIP_OFF);
1415 
1416 	if (features & NETIF_F_HW_VLAN_CTAG_TX) {
1417 		sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T),
1418 			     TX_VLAN_TAG_ON);
1419 
1420 		dev->vlan_features |= SKY2_VLAN_OFFLOADS;
1421 	} else {
1422 		sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T),
1423 			     TX_VLAN_TAG_OFF);
1424 
1425 		/* Can't do transmit offload of vlan without hw vlan */
1426 		dev->vlan_features &= ~SKY2_VLAN_OFFLOADS;
1427 	}
1428 }
1429 
1430 /* Amount of required worst case padding in rx buffer */
1431 static inline unsigned sky2_rx_pad(const struct sky2_hw *hw)
1432 {
1433 	return (hw->flags & SKY2_HW_RAM_BUFFER) ? 8 : 2;
1434 }
1435 
1436 /*
1437  * Allocate an skb for receiving. If the MTU is large enough
1438  * make the skb non-linear with a fragment list of pages.
1439  */
1440 static struct sk_buff *sky2_rx_alloc(struct sky2_port *sky2, gfp_t gfp)
1441 {
1442 	struct sk_buff *skb;
1443 	int i;
1444 
1445 	skb = __netdev_alloc_skb(sky2->netdev,
1446 				 sky2->rx_data_size + sky2_rx_pad(sky2->hw),
1447 				 gfp);
1448 	if (!skb)
1449 		goto nomem;
1450 
1451 	if (sky2->hw->flags & SKY2_HW_RAM_BUFFER) {
1452 		unsigned char *start;
1453 		/*
1454 		 * Workaround for a bug in FIFO that cause hang
1455 		 * if the FIFO if the receive buffer is not 64 byte aligned.
1456 		 * The buffer returned from netdev_alloc_skb is
1457 		 * aligned except if slab debugging is enabled.
1458 		 */
1459 		start = PTR_ALIGN(skb->data, 8);
1460 		skb_reserve(skb, start - skb->data);
1461 	} else
1462 		skb_reserve(skb, NET_IP_ALIGN);
1463 
1464 	for (i = 0; i < sky2->rx_nfrags; i++) {
1465 		struct page *page = alloc_page(gfp);
1466 
1467 		if (!page)
1468 			goto free_partial;
1469 		skb_fill_page_desc(skb, i, page, 0, PAGE_SIZE);
1470 	}
1471 
1472 	return skb;
1473 free_partial:
1474 	kfree_skb(skb);
1475 nomem:
1476 	return NULL;
1477 }
1478 
1479 static inline void sky2_rx_update(struct sky2_port *sky2, unsigned rxq)
1480 {
1481 	sky2_put_idx(sky2->hw, rxq, sky2->rx_put);
1482 }
1483 
1484 static int sky2_alloc_rx_skbs(struct sky2_port *sky2)
1485 {
1486 	struct sky2_hw *hw = sky2->hw;
1487 	unsigned i;
1488 
1489 	sky2->rx_data_size = sky2_get_rx_data_size(sky2);
1490 
1491 	/* Fill Rx ring */
1492 	for (i = 0; i < sky2->rx_pending; i++) {
1493 		struct rx_ring_info *re = sky2->rx_ring + i;
1494 
1495 		re->skb = sky2_rx_alloc(sky2, GFP_KERNEL);
1496 		if (!re->skb)
1497 			return -ENOMEM;
1498 
1499 		if (sky2_rx_map_skb(hw->pdev, re, sky2->rx_data_size)) {
1500 			dev_kfree_skb(re->skb);
1501 			re->skb = NULL;
1502 			return -ENOMEM;
1503 		}
1504 	}
1505 	return 0;
1506 }
1507 
1508 /*
1509  * Setup receiver buffer pool.
1510  * Normal case this ends up creating one list element for skb
1511  * in the receive ring. Worst case if using large MTU and each
1512  * allocation falls on a different 64 bit region, that results
1513  * in 6 list elements per ring entry.
1514  * One element is used for checksum enable/disable, and one
1515  * extra to avoid wrap.
1516  */
1517 static void sky2_rx_start(struct sky2_port *sky2)
1518 {
1519 	struct sky2_hw *hw = sky2->hw;
1520 	struct rx_ring_info *re;
1521 	unsigned rxq = rxqaddr[sky2->port];
1522 	unsigned i, thresh;
1523 
1524 	sky2->rx_put = sky2->rx_next = 0;
1525 	sky2_qset(hw, rxq);
1526 
1527 	/* On PCI express lowering the watermark gives better performance */
1528 	if (pci_is_pcie(hw->pdev))
1529 		sky2_write32(hw, Q_ADDR(rxq, Q_WM), BMU_WM_PEX);
1530 
1531 	/* These chips have no ram buffer?
1532 	 * MAC Rx RAM Read is controlled by hardware
1533 	 */
1534 	if (hw->chip_id == CHIP_ID_YUKON_EC_U &&
1535 	    hw->chip_rev > CHIP_REV_YU_EC_U_A0)
1536 		sky2_write32(hw, Q_ADDR(rxq, Q_TEST), F_M_RX_RAM_DIS);
1537 
1538 	sky2_prefetch_init(hw, rxq, sky2->rx_le_map, RX_LE_SIZE - 1);
1539 
1540 	if (!(hw->flags & SKY2_HW_NEW_LE))
1541 		rx_set_checksum(sky2);
1542 
1543 	if (!(hw->flags & SKY2_HW_RSS_BROKEN))
1544 		rx_set_rss(sky2->netdev, sky2->netdev->features);
1545 
1546 	/* submit Rx ring */
1547 	for (i = 0; i < sky2->rx_pending; i++) {
1548 		re = sky2->rx_ring + i;
1549 		sky2_rx_submit(sky2, re);
1550 	}
1551 
1552 	/*
1553 	 * The receiver hangs if it receives frames larger than the
1554 	 * packet buffer. As a workaround, truncate oversize frames, but
1555 	 * the register is limited to 9 bits, so if you do frames > 2052
1556 	 * you better get the MTU right!
1557 	 */
1558 	thresh = sky2_get_rx_threshold(sky2);
1559 	if (thresh > 0x1ff)
1560 		sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_OFF);
1561 	else {
1562 		sky2_write16(hw, SK_REG(sky2->port, RX_GMF_TR_THR), thresh);
1563 		sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_ON);
1564 	}
1565 
1566 	/* Tell chip about available buffers */
1567 	sky2_rx_update(sky2, rxq);
1568 
1569 	if (hw->chip_id == CHIP_ID_YUKON_EX ||
1570 	    hw->chip_id == CHIP_ID_YUKON_SUPR) {
1571 		/*
1572 		 * Disable flushing of non ASF packets;
1573 		 * must be done after initializing the BMUs;
1574 		 * drivers without ASF support should do this too, otherwise
1575 		 * it may happen that they cannot run on ASF devices;
1576 		 * remember that the MAC FIFO isn't reset during initialization.
1577 		 */
1578 		sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_MACSEC_FLUSH_OFF);
1579 	}
1580 
1581 	if (hw->chip_id >= CHIP_ID_YUKON_SUPR) {
1582 		/* Enable RX Home Address & Routing Header checksum fix */
1583 		sky2_write16(hw, SK_REG(sky2->port, RX_GMF_FL_CTRL),
1584 			     RX_IPV6_SA_MOB_ENA | RX_IPV6_DA_MOB_ENA);
1585 
1586 		/* Enable TX Home Address & Routing Header checksum fix */
1587 		sky2_write32(hw, Q_ADDR(txqaddr[sky2->port], Q_TEST),
1588 			     TBMU_TEST_HOME_ADD_FIX_EN | TBMU_TEST_ROUTING_ADD_FIX_EN);
1589 	}
1590 }
1591 
1592 static int sky2_alloc_buffers(struct sky2_port *sky2)
1593 {
1594 	struct sky2_hw *hw = sky2->hw;
1595 
1596 	/* must be power of 2 */
1597 	sky2->tx_le = dma_alloc_coherent(&hw->pdev->dev,
1598 					 sky2->tx_ring_size * sizeof(struct sky2_tx_le),
1599 					 &sky2->tx_le_map, GFP_KERNEL);
1600 	if (!sky2->tx_le)
1601 		goto nomem;
1602 
1603 	sky2->tx_ring = kcalloc(sky2->tx_ring_size, sizeof(struct tx_ring_info),
1604 				GFP_KERNEL);
1605 	if (!sky2->tx_ring)
1606 		goto nomem;
1607 
1608 	sky2->rx_le = dma_alloc_coherent(&hw->pdev->dev, RX_LE_BYTES,
1609 					 &sky2->rx_le_map, GFP_KERNEL);
1610 	if (!sky2->rx_le)
1611 		goto nomem;
1612 
1613 	sky2->rx_ring = kcalloc(sky2->rx_pending, sizeof(struct rx_ring_info),
1614 				GFP_KERNEL);
1615 	if (!sky2->rx_ring)
1616 		goto nomem;
1617 
1618 	return sky2_alloc_rx_skbs(sky2);
1619 nomem:
1620 	return -ENOMEM;
1621 }
1622 
1623 static void sky2_free_buffers(struct sky2_port *sky2)
1624 {
1625 	struct sky2_hw *hw = sky2->hw;
1626 
1627 	sky2_rx_clean(sky2);
1628 
1629 	if (sky2->rx_le) {
1630 		dma_free_coherent(&hw->pdev->dev, RX_LE_BYTES, sky2->rx_le,
1631 				  sky2->rx_le_map);
1632 		sky2->rx_le = NULL;
1633 	}
1634 	if (sky2->tx_le) {
1635 		dma_free_coherent(&hw->pdev->dev,
1636 				  sky2->tx_ring_size * sizeof(struct sky2_tx_le),
1637 				  sky2->tx_le, sky2->tx_le_map);
1638 		sky2->tx_le = NULL;
1639 	}
1640 	kfree(sky2->tx_ring);
1641 	kfree(sky2->rx_ring);
1642 
1643 	sky2->tx_ring = NULL;
1644 	sky2->rx_ring = NULL;
1645 }
1646 
1647 static void sky2_hw_up(struct sky2_port *sky2)
1648 {
1649 	struct sky2_hw *hw = sky2->hw;
1650 	unsigned port = sky2->port;
1651 	u32 ramsize;
1652 	int cap;
1653 	struct net_device *otherdev = hw->dev[sky2->port^1];
1654 
1655 	tx_init(sky2);
1656 
1657 	/*
1658 	 * On dual port PCI-X card, there is an problem where status
1659 	 * can be received out of order due to split transactions
1660 	 */
1661 	if (otherdev && netif_running(otherdev) &&
1662 	    (cap = pci_find_capability(hw->pdev, PCI_CAP_ID_PCIX))) {
1663 		u16 cmd;
1664 
1665 		cmd = sky2_pci_read16(hw, cap + PCI_X_CMD);
1666 		cmd &= ~PCI_X_CMD_MAX_SPLIT;
1667 		sky2_pci_write16(hw, cap + PCI_X_CMD, cmd);
1668 	}
1669 
1670 	sky2_mac_init(hw, port);
1671 
1672 	/* Register is number of 4K blocks on internal RAM buffer. */
1673 	ramsize = sky2_read8(hw, B2_E_0) * 4;
1674 	if (ramsize > 0) {
1675 		u32 rxspace;
1676 
1677 		netdev_dbg(sky2->netdev, "ram buffer %dK\n", ramsize);
1678 		if (ramsize < 16)
1679 			rxspace = ramsize / 2;
1680 		else
1681 			rxspace = 8 + (2*(ramsize - 16))/3;
1682 
1683 		sky2_ramset(hw, rxqaddr[port], 0, rxspace);
1684 		sky2_ramset(hw, txqaddr[port], rxspace, ramsize - rxspace);
1685 
1686 		/* Make sure SyncQ is disabled */
1687 		sky2_write8(hw, RB_ADDR(port == 0 ? Q_XS1 : Q_XS2, RB_CTRL),
1688 			    RB_RST_SET);
1689 	}
1690 
1691 	sky2_qset(hw, txqaddr[port]);
1692 
1693 	/* This is copied from sk98lin 10.0.5.3; no one tells me about erratta's */
1694 	if (hw->chip_id == CHIP_ID_YUKON_EX && hw->chip_rev == CHIP_REV_YU_EX_B0)
1695 		sky2_write32(hw, Q_ADDR(txqaddr[port], Q_TEST), F_TX_CHK_AUTO_OFF);
1696 
1697 	/* Set almost empty threshold */
1698 	if (hw->chip_id == CHIP_ID_YUKON_EC_U &&
1699 	    hw->chip_rev == CHIP_REV_YU_EC_U_A0)
1700 		sky2_write16(hw, Q_ADDR(txqaddr[port], Q_AL), ECU_TXFF_LEV);
1701 
1702 	sky2_prefetch_init(hw, txqaddr[port], sky2->tx_le_map,
1703 			   sky2->tx_ring_size - 1);
1704 
1705 	sky2_vlan_mode(sky2->netdev, sky2->netdev->features);
1706 	netdev_update_features(sky2->netdev);
1707 
1708 	sky2_rx_start(sky2);
1709 }
1710 
1711 /* Setup device IRQ and enable napi to process */
1712 static int sky2_setup_irq(struct sky2_hw *hw, const char *name)
1713 {
1714 	struct pci_dev *pdev = hw->pdev;
1715 	int err;
1716 
1717 	err = request_irq(pdev->irq, sky2_intr,
1718 			  (hw->flags & SKY2_HW_USE_MSI) ? 0 : IRQF_SHARED,
1719 			  name, hw);
1720 	if (err)
1721 		dev_err(&pdev->dev, "cannot assign irq %d\n", pdev->irq);
1722 	else {
1723 		hw->flags |= SKY2_HW_IRQ_SETUP;
1724 
1725 		napi_enable(&hw->napi);
1726 		sky2_write32(hw, B0_IMSK, Y2_IS_BASE);
1727 		sky2_read32(hw, B0_IMSK);
1728 	}
1729 
1730 	return err;
1731 }
1732 
1733 
1734 /* Bring up network interface. */
1735 static int sky2_open(struct net_device *dev)
1736 {
1737 	struct sky2_port *sky2 = netdev_priv(dev);
1738 	struct sky2_hw *hw = sky2->hw;
1739 	unsigned port = sky2->port;
1740 	u32 imask;
1741 	int err;
1742 
1743 	netif_carrier_off(dev);
1744 
1745 	err = sky2_alloc_buffers(sky2);
1746 	if (err)
1747 		goto err_out;
1748 
1749 	/* With single port, IRQ is setup when device is brought up */
1750 	if (hw->ports == 1 && (err = sky2_setup_irq(hw, dev->name)))
1751 		goto err_out;
1752 
1753 	sky2_hw_up(sky2);
1754 
1755 	/* Enable interrupts from phy/mac for port */
1756 	imask = sky2_read32(hw, B0_IMSK);
1757 
1758 	if (hw->chip_id == CHIP_ID_YUKON_OPT ||
1759 	    hw->chip_id == CHIP_ID_YUKON_PRM ||
1760 	    hw->chip_id == CHIP_ID_YUKON_OP_2)
1761 		imask |= Y2_IS_PHY_QLNK;	/* enable PHY Quick Link */
1762 
1763 	imask |= portirq_msk[port];
1764 	sky2_write32(hw, B0_IMSK, imask);
1765 	sky2_read32(hw, B0_IMSK);
1766 
1767 	netif_info(sky2, ifup, dev, "enabling interface\n");
1768 
1769 	return 0;
1770 
1771 err_out:
1772 	sky2_free_buffers(sky2);
1773 	return err;
1774 }
1775 
1776 /* Modular subtraction in ring */
1777 static inline int tx_inuse(const struct sky2_port *sky2)
1778 {
1779 	return (sky2->tx_prod - sky2->tx_cons) & (sky2->tx_ring_size - 1);
1780 }
1781 
1782 /* Number of list elements available for next tx */
1783 static inline int tx_avail(const struct sky2_port *sky2)
1784 {
1785 	return sky2->tx_pending - tx_inuse(sky2);
1786 }
1787 
1788 /* Estimate of number of transmit list elements required */
1789 static unsigned tx_le_req(const struct sk_buff *skb)
1790 {
1791 	unsigned count;
1792 
1793 	count = (skb_shinfo(skb)->nr_frags + 1)
1794 		* (sizeof(dma_addr_t) / sizeof(u32));
1795 
1796 	if (skb_is_gso(skb))
1797 		++count;
1798 	else if (sizeof(dma_addr_t) == sizeof(u32))
1799 		++count;	/* possible vlan */
1800 
1801 	if (skb->ip_summed == CHECKSUM_PARTIAL)
1802 		++count;
1803 
1804 	return count;
1805 }
1806 
1807 static void sky2_tx_unmap(struct pci_dev *pdev, struct tx_ring_info *re)
1808 {
1809 	if (re->flags & TX_MAP_SINGLE)
1810 		dma_unmap_single(&pdev->dev, dma_unmap_addr(re, mapaddr),
1811 				 dma_unmap_len(re, maplen), DMA_TO_DEVICE);
1812 	else if (re->flags & TX_MAP_PAGE)
1813 		dma_unmap_page(&pdev->dev, dma_unmap_addr(re, mapaddr),
1814 			       dma_unmap_len(re, maplen), DMA_TO_DEVICE);
1815 	re->flags = 0;
1816 }
1817 
1818 /*
1819  * Put one packet in ring for transmit.
1820  * A single packet can generate multiple list elements, and
1821  * the number of ring elements will probably be less than the number
1822  * of list elements used.
1823  */
1824 static netdev_tx_t sky2_xmit_frame(struct sk_buff *skb,
1825 				   struct net_device *dev)
1826 {
1827 	struct sky2_port *sky2 = netdev_priv(dev);
1828 	struct sky2_hw *hw = sky2->hw;
1829 	struct sky2_tx_le *le = NULL;
1830 	struct tx_ring_info *re;
1831 	unsigned i, len;
1832 	dma_addr_t mapping;
1833 	u32 upper;
1834 	u16 slot;
1835 	u16 mss;
1836 	u8 ctrl;
1837 
1838 	if (unlikely(tx_avail(sky2) < tx_le_req(skb)))
1839 		return NETDEV_TX_BUSY;
1840 
1841 	len = skb_headlen(skb);
1842 	mapping = dma_map_single(&hw->pdev->dev, skb->data, len,
1843 				 DMA_TO_DEVICE);
1844 
1845 	if (dma_mapping_error(&hw->pdev->dev, mapping))
1846 		goto mapping_error;
1847 
1848 	slot = sky2->tx_prod;
1849 	netif_printk(sky2, tx_queued, KERN_DEBUG, dev,
1850 		     "tx queued, slot %u, len %d\n", slot, skb->len);
1851 
1852 	/* Send high bits if needed */
1853 	upper = upper_32_bits(mapping);
1854 	if (upper != sky2->tx_last_upper) {
1855 		le = get_tx_le(sky2, &slot);
1856 		le->addr = cpu_to_le32(upper);
1857 		sky2->tx_last_upper = upper;
1858 		le->opcode = OP_ADDR64 | HW_OWNER;
1859 	}
1860 
1861 	/* Check for TCP Segmentation Offload */
1862 	mss = skb_shinfo(skb)->gso_size;
1863 	if (mss != 0) {
1864 
1865 		if (!(hw->flags & SKY2_HW_NEW_LE))
1866 			mss += skb_tcp_all_headers(skb);
1867 
1868 		if (mss != sky2->tx_last_mss) {
1869 			le = get_tx_le(sky2, &slot);
1870 			le->addr = cpu_to_le32(mss);
1871 
1872 			if (hw->flags & SKY2_HW_NEW_LE)
1873 				le->opcode = OP_MSS | HW_OWNER;
1874 			else
1875 				le->opcode = OP_LRGLEN | HW_OWNER;
1876 			sky2->tx_last_mss = mss;
1877 		}
1878 	}
1879 
1880 	ctrl = 0;
1881 
1882 	/* Add VLAN tag, can piggyback on LRGLEN or ADDR64 */
1883 	if (skb_vlan_tag_present(skb)) {
1884 		if (!le) {
1885 			le = get_tx_le(sky2, &slot);
1886 			le->addr = 0;
1887 			le->opcode = OP_VLAN|HW_OWNER;
1888 		} else
1889 			le->opcode |= OP_VLAN;
1890 		le->length = cpu_to_be16(skb_vlan_tag_get(skb));
1891 		ctrl |= INS_VLAN;
1892 	}
1893 
1894 	/* Handle TCP checksum offload */
1895 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
1896 		/* On Yukon EX (some versions) encoding change. */
1897 		if (hw->flags & SKY2_HW_AUTO_TX_SUM)
1898 			ctrl |= CALSUM;	/* auto checksum */
1899 		else {
1900 			const unsigned offset = skb_transport_offset(skb);
1901 			u32 tcpsum;
1902 
1903 			tcpsum = offset << 16;			/* sum start */
1904 			tcpsum |= offset + skb->csum_offset;	/* sum write */
1905 
1906 			ctrl |= CALSUM | WR_SUM | INIT_SUM | LOCK_SUM;
1907 			if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1908 				ctrl |= UDPTCP;
1909 
1910 			if (tcpsum != sky2->tx_tcpsum) {
1911 				sky2->tx_tcpsum = tcpsum;
1912 
1913 				le = get_tx_le(sky2, &slot);
1914 				le->addr = cpu_to_le32(tcpsum);
1915 				le->length = 0;	/* initial checksum value */
1916 				le->ctrl = 1;	/* one packet */
1917 				le->opcode = OP_TCPLISW | HW_OWNER;
1918 			}
1919 		}
1920 	}
1921 
1922 	re = sky2->tx_ring + slot;
1923 	re->flags = TX_MAP_SINGLE;
1924 	dma_unmap_addr_set(re, mapaddr, mapping);
1925 	dma_unmap_len_set(re, maplen, len);
1926 
1927 	le = get_tx_le(sky2, &slot);
1928 	le->addr = cpu_to_le32(lower_32_bits(mapping));
1929 	le->length = cpu_to_le16(len);
1930 	le->ctrl = ctrl;
1931 	le->opcode = mss ? (OP_LARGESEND | HW_OWNER) : (OP_PACKET | HW_OWNER);
1932 
1933 
1934 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1935 		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1936 
1937 		mapping = skb_frag_dma_map(&hw->pdev->dev, frag, 0,
1938 					   skb_frag_size(frag), DMA_TO_DEVICE);
1939 
1940 		if (dma_mapping_error(&hw->pdev->dev, mapping))
1941 			goto mapping_unwind;
1942 
1943 		upper = upper_32_bits(mapping);
1944 		if (upper != sky2->tx_last_upper) {
1945 			le = get_tx_le(sky2, &slot);
1946 			le->addr = cpu_to_le32(upper);
1947 			sky2->tx_last_upper = upper;
1948 			le->opcode = OP_ADDR64 | HW_OWNER;
1949 		}
1950 
1951 		re = sky2->tx_ring + slot;
1952 		re->flags = TX_MAP_PAGE;
1953 		dma_unmap_addr_set(re, mapaddr, mapping);
1954 		dma_unmap_len_set(re, maplen, skb_frag_size(frag));
1955 
1956 		le = get_tx_le(sky2, &slot);
1957 		le->addr = cpu_to_le32(lower_32_bits(mapping));
1958 		le->length = cpu_to_le16(skb_frag_size(frag));
1959 		le->ctrl = ctrl;
1960 		le->opcode = OP_BUFFER | HW_OWNER;
1961 	}
1962 
1963 	re->skb = skb;
1964 	le->ctrl |= EOP;
1965 
1966 	sky2->tx_prod = slot;
1967 
1968 	if (tx_avail(sky2) <= MAX_SKB_TX_LE)
1969 		netif_stop_queue(dev);
1970 
1971 	netdev_sent_queue(dev, skb->len);
1972 	sky2_put_idx(hw, txqaddr[sky2->port], sky2->tx_prod);
1973 
1974 	return NETDEV_TX_OK;
1975 
1976 mapping_unwind:
1977 	for (i = sky2->tx_prod; i != slot; i = RING_NEXT(i, sky2->tx_ring_size)) {
1978 		re = sky2->tx_ring + i;
1979 
1980 		sky2_tx_unmap(hw->pdev, re);
1981 	}
1982 
1983 mapping_error:
1984 	if (net_ratelimit())
1985 		dev_warn(&hw->pdev->dev, "%s: tx mapping error\n", dev->name);
1986 	dev_kfree_skb_any(skb);
1987 	return NETDEV_TX_OK;
1988 }
1989 
1990 /*
1991  * Free ring elements from starting at tx_cons until "done"
1992  *
1993  * NB:
1994  *  1. The hardware will tell us about partial completion of multi-part
1995  *     buffers so make sure not to free skb to early.
1996  *  2. This may run in parallel start_xmit because the it only
1997  *     looks at the tail of the queue of FIFO (tx_cons), not
1998  *     the head (tx_prod)
1999  */
2000 static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
2001 {
2002 	struct net_device *dev = sky2->netdev;
2003 	u16 idx;
2004 	unsigned int bytes_compl = 0, pkts_compl = 0;
2005 
2006 	BUG_ON(done >= sky2->tx_ring_size);
2007 
2008 	for (idx = sky2->tx_cons; idx != done;
2009 	     idx = RING_NEXT(idx, sky2->tx_ring_size)) {
2010 		struct tx_ring_info *re = sky2->tx_ring + idx;
2011 		struct sk_buff *skb = re->skb;
2012 
2013 		sky2_tx_unmap(sky2->hw->pdev, re);
2014 
2015 		if (skb) {
2016 			netif_printk(sky2, tx_done, KERN_DEBUG, dev,
2017 				     "tx done %u\n", idx);
2018 
2019 			pkts_compl++;
2020 			bytes_compl += skb->len;
2021 
2022 			re->skb = NULL;
2023 			dev_kfree_skb_any(skb);
2024 
2025 			sky2->tx_next = RING_NEXT(idx, sky2->tx_ring_size);
2026 		}
2027 	}
2028 
2029 	sky2->tx_cons = idx;
2030 	smp_mb();
2031 
2032 	netdev_completed_queue(dev, pkts_compl, bytes_compl);
2033 
2034 	u64_stats_update_begin(&sky2->tx_stats.syncp);
2035 	sky2->tx_stats.packets += pkts_compl;
2036 	sky2->tx_stats.bytes += bytes_compl;
2037 	u64_stats_update_end(&sky2->tx_stats.syncp);
2038 }
2039 
2040 static void sky2_tx_reset(struct sky2_hw *hw, unsigned port)
2041 {
2042 	/* Disable Force Sync bit and Enable Alloc bit */
2043 	sky2_write8(hw, SK_REG(port, TXA_CTRL),
2044 		    TXA_DIS_FSYNC | TXA_DIS_ALLOC | TXA_STOP_RC);
2045 
2046 	/* Stop Interval Timer and Limit Counter of Tx Arbiter */
2047 	sky2_write32(hw, SK_REG(port, TXA_ITI_INI), 0L);
2048 	sky2_write32(hw, SK_REG(port, TXA_LIM_INI), 0L);
2049 
2050 	/* Reset the PCI FIFO of the async Tx queue */
2051 	sky2_write32(hw, Q_ADDR(txqaddr[port], Q_CSR),
2052 		     BMU_RST_SET | BMU_FIFO_RST);
2053 
2054 	/* Reset the Tx prefetch units */
2055 	sky2_write32(hw, Y2_QADDR(txqaddr[port], PREF_UNIT_CTRL),
2056 		     PREF_UNIT_RST_SET);
2057 
2058 	sky2_write32(hw, RB_ADDR(txqaddr[port], RB_CTRL), RB_RST_SET);
2059 	sky2_write8(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_RST_SET);
2060 
2061 	sky2_read32(hw, B0_CTST);
2062 }
2063 
2064 static void sky2_hw_down(struct sky2_port *sky2)
2065 {
2066 	struct sky2_hw *hw = sky2->hw;
2067 	unsigned port = sky2->port;
2068 	u16 ctrl;
2069 
2070 	/* Force flow control off */
2071 	sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
2072 
2073 	/* Stop transmitter */
2074 	sky2_write32(hw, Q_ADDR(txqaddr[port], Q_CSR), BMU_STOP);
2075 	sky2_read32(hw, Q_ADDR(txqaddr[port], Q_CSR));
2076 
2077 	sky2_write32(hw, RB_ADDR(txqaddr[port], RB_CTRL),
2078 		     RB_RST_SET | RB_DIS_OP_MD);
2079 
2080 	ctrl = gma_read16(hw, port, GM_GP_CTRL);
2081 	ctrl &= ~(GM_GPCR_TX_ENA | GM_GPCR_RX_ENA);
2082 	gma_write16(hw, port, GM_GP_CTRL, ctrl);
2083 
2084 	sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_SET);
2085 
2086 	/* Workaround shared GMAC reset */
2087 	if (!(hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev == 0 &&
2088 	      port == 0 && hw->dev[1] && netif_running(hw->dev[1])))
2089 		sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_RST_SET);
2090 
2091 	sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET);
2092 
2093 	/* Force any delayed status interrupt and NAPI */
2094 	sky2_write32(hw, STAT_LEV_TIMER_CNT, 0);
2095 	sky2_write32(hw, STAT_TX_TIMER_CNT, 0);
2096 	sky2_write32(hw, STAT_ISR_TIMER_CNT, 0);
2097 	sky2_read8(hw, STAT_ISR_TIMER_CTRL);
2098 
2099 	sky2_rx_stop(sky2);
2100 
2101 	spin_lock_bh(&sky2->phy_lock);
2102 	sky2_phy_power_down(hw, port);
2103 	spin_unlock_bh(&sky2->phy_lock);
2104 
2105 	sky2_tx_reset(hw, port);
2106 
2107 	/* Free any pending frames stuck in HW queue */
2108 	sky2_tx_complete(sky2, sky2->tx_prod);
2109 }
2110 
2111 /* Network shutdown */
2112 static int sky2_close(struct net_device *dev)
2113 {
2114 	struct sky2_port *sky2 = netdev_priv(dev);
2115 	struct sky2_hw *hw = sky2->hw;
2116 
2117 	/* Never really got started! */
2118 	if (!sky2->tx_le)
2119 		return 0;
2120 
2121 	netif_info(sky2, ifdown, dev, "disabling interface\n");
2122 
2123 	if (hw->ports == 1) {
2124 		sky2_write32(hw, B0_IMSK, 0);
2125 		sky2_read32(hw, B0_IMSK);
2126 
2127 		napi_disable(&hw->napi);
2128 		free_irq(hw->pdev->irq, hw);
2129 		hw->flags &= ~SKY2_HW_IRQ_SETUP;
2130 	} else {
2131 		u32 imask;
2132 
2133 		/* Disable port IRQ */
2134 		imask  = sky2_read32(hw, B0_IMSK);
2135 		imask &= ~portirq_msk[sky2->port];
2136 		sky2_write32(hw, B0_IMSK, imask);
2137 		sky2_read32(hw, B0_IMSK);
2138 
2139 		synchronize_irq(hw->pdev->irq);
2140 		napi_synchronize(&hw->napi);
2141 	}
2142 
2143 	sky2_hw_down(sky2);
2144 
2145 	sky2_free_buffers(sky2);
2146 
2147 	return 0;
2148 }
2149 
2150 static u16 sky2_phy_speed(const struct sky2_hw *hw, u16 aux)
2151 {
2152 	if (hw->flags & SKY2_HW_FIBRE_PHY)
2153 		return SPEED_1000;
2154 
2155 	if (!(hw->flags & SKY2_HW_GIGABIT)) {
2156 		if (aux & PHY_M_PS_SPEED_100)
2157 			return SPEED_100;
2158 		else
2159 			return SPEED_10;
2160 	}
2161 
2162 	switch (aux & PHY_M_PS_SPEED_MSK) {
2163 	case PHY_M_PS_SPEED_1000:
2164 		return SPEED_1000;
2165 	case PHY_M_PS_SPEED_100:
2166 		return SPEED_100;
2167 	default:
2168 		return SPEED_10;
2169 	}
2170 }
2171 
2172 static void sky2_link_up(struct sky2_port *sky2)
2173 {
2174 	struct sky2_hw *hw = sky2->hw;
2175 	unsigned port = sky2->port;
2176 	static const char *fc_name[] = {
2177 		[FC_NONE]	= "none",
2178 		[FC_TX]		= "tx",
2179 		[FC_RX]		= "rx",
2180 		[FC_BOTH]	= "both",
2181 	};
2182 
2183 	sky2_set_ipg(sky2);
2184 
2185 	sky2_enable_rx_tx(sky2);
2186 
2187 	gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_DEF_MSK);
2188 
2189 	netif_carrier_on(sky2->netdev);
2190 
2191 	mod_timer(&hw->watchdog_timer, jiffies + 1);
2192 
2193 	/* Turn on link LED */
2194 	sky2_write8(hw, SK_REG(port, LNK_LED_REG),
2195 		    LINKLED_ON | LINKLED_BLINK_OFF | LINKLED_LINKSYNC_OFF);
2196 
2197 	netif_info(sky2, link, sky2->netdev,
2198 		   "Link is up at %d Mbps, %s duplex, flow control %s\n",
2199 		   sky2->speed,
2200 		   sky2->duplex == DUPLEX_FULL ? "full" : "half",
2201 		   fc_name[sky2->flow_status]);
2202 }
2203 
2204 static void sky2_link_down(struct sky2_port *sky2)
2205 {
2206 	struct sky2_hw *hw = sky2->hw;
2207 	unsigned port = sky2->port;
2208 	u16 reg;
2209 
2210 	gm_phy_write(hw, port, PHY_MARV_INT_MASK, 0);
2211 
2212 	reg = gma_read16(hw, port, GM_GP_CTRL);
2213 	reg &= ~(GM_GPCR_RX_ENA | GM_GPCR_TX_ENA);
2214 	gma_write16(hw, port, GM_GP_CTRL, reg);
2215 
2216 	netif_carrier_off(sky2->netdev);
2217 
2218 	/* Turn off link LED */
2219 	sky2_write8(hw, SK_REG(port, LNK_LED_REG), LINKLED_OFF);
2220 
2221 	netif_info(sky2, link, sky2->netdev, "Link is down\n");
2222 
2223 	sky2_phy_init(hw, port);
2224 }
2225 
2226 static enum flow_control sky2_flow(int rx, int tx)
2227 {
2228 	if (rx)
2229 		return tx ? FC_BOTH : FC_RX;
2230 	else
2231 		return tx ? FC_TX : FC_NONE;
2232 }
2233 
2234 static int sky2_autoneg_done(struct sky2_port *sky2, u16 aux)
2235 {
2236 	struct sky2_hw *hw = sky2->hw;
2237 	unsigned port = sky2->port;
2238 	u16 advert, lpa;
2239 
2240 	advert = gm_phy_read(hw, port, PHY_MARV_AUNE_ADV);
2241 	lpa = gm_phy_read(hw, port, PHY_MARV_AUNE_LP);
2242 	if (lpa & PHY_M_AN_RF) {
2243 		netdev_err(sky2->netdev, "remote fault\n");
2244 		return -1;
2245 	}
2246 
2247 	if (!(aux & PHY_M_PS_SPDUP_RES)) {
2248 		netdev_err(sky2->netdev, "speed/duplex mismatch\n");
2249 		return -1;
2250 	}
2251 
2252 	sky2->speed = sky2_phy_speed(hw, aux);
2253 	sky2->duplex = (aux & PHY_M_PS_FULL_DUP) ? DUPLEX_FULL : DUPLEX_HALF;
2254 
2255 	/* Since the pause result bits seem to in different positions on
2256 	 * different chips. look at registers.
2257 	 */
2258 	if (hw->flags & SKY2_HW_FIBRE_PHY) {
2259 		/* Shift for bits in fiber PHY */
2260 		advert &= ~(ADVERTISE_PAUSE_CAP|ADVERTISE_PAUSE_ASYM);
2261 		lpa &= ~(LPA_PAUSE_CAP|LPA_PAUSE_ASYM);
2262 
2263 		if (advert & ADVERTISE_1000XPAUSE)
2264 			advert |= ADVERTISE_PAUSE_CAP;
2265 		if (advert & ADVERTISE_1000XPSE_ASYM)
2266 			advert |= ADVERTISE_PAUSE_ASYM;
2267 		if (lpa & LPA_1000XPAUSE)
2268 			lpa |= LPA_PAUSE_CAP;
2269 		if (lpa & LPA_1000XPAUSE_ASYM)
2270 			lpa |= LPA_PAUSE_ASYM;
2271 	}
2272 
2273 	sky2->flow_status = FC_NONE;
2274 	if (advert & ADVERTISE_PAUSE_CAP) {
2275 		if (lpa & LPA_PAUSE_CAP)
2276 			sky2->flow_status = FC_BOTH;
2277 		else if (advert & ADVERTISE_PAUSE_ASYM)
2278 			sky2->flow_status = FC_RX;
2279 	} else if (advert & ADVERTISE_PAUSE_ASYM) {
2280 		if ((lpa & LPA_PAUSE_CAP) && (lpa & LPA_PAUSE_ASYM))
2281 			sky2->flow_status = FC_TX;
2282 	}
2283 
2284 	if (sky2->duplex == DUPLEX_HALF && sky2->speed < SPEED_1000 &&
2285 	    !(hw->chip_id == CHIP_ID_YUKON_EC_U || hw->chip_id == CHIP_ID_YUKON_EX))
2286 		sky2->flow_status = FC_NONE;
2287 
2288 	if (sky2->flow_status & FC_TX)
2289 		sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_ON);
2290 	else
2291 		sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
2292 
2293 	return 0;
2294 }
2295 
2296 /* Interrupt from PHY */
2297 static void sky2_phy_intr(struct sky2_hw *hw, unsigned port)
2298 {
2299 	struct net_device *dev = hw->dev[port];
2300 	struct sky2_port *sky2 = netdev_priv(dev);
2301 	u16 istatus, phystat;
2302 
2303 	if (!netif_running(dev))
2304 		return;
2305 
2306 	spin_lock(&sky2->phy_lock);
2307 	istatus = gm_phy_read(hw, port, PHY_MARV_INT_STAT);
2308 	phystat = gm_phy_read(hw, port, PHY_MARV_PHY_STAT);
2309 
2310 	netif_info(sky2, intr, sky2->netdev, "phy interrupt status 0x%x 0x%x\n",
2311 		   istatus, phystat);
2312 
2313 	if (istatus & PHY_M_IS_AN_COMPL) {
2314 		if (sky2_autoneg_done(sky2, phystat) == 0 &&
2315 		    !netif_carrier_ok(dev))
2316 			sky2_link_up(sky2);
2317 		goto out;
2318 	}
2319 
2320 	if (istatus & PHY_M_IS_LSP_CHANGE)
2321 		sky2->speed = sky2_phy_speed(hw, phystat);
2322 
2323 	if (istatus & PHY_M_IS_DUP_CHANGE)
2324 		sky2->duplex =
2325 		    (phystat & PHY_M_PS_FULL_DUP) ? DUPLEX_FULL : DUPLEX_HALF;
2326 
2327 	if (istatus & PHY_M_IS_LST_CHANGE) {
2328 		if (phystat & PHY_M_PS_LINK_UP)
2329 			sky2_link_up(sky2);
2330 		else
2331 			sky2_link_down(sky2);
2332 	}
2333 out:
2334 	spin_unlock(&sky2->phy_lock);
2335 }
2336 
2337 /* Special quick link interrupt (Yukon-2 Optima only) */
2338 static void sky2_qlink_intr(struct sky2_hw *hw)
2339 {
2340 	struct sky2_port *sky2 = netdev_priv(hw->dev[0]);
2341 	u32 imask;
2342 	u16 phy;
2343 
2344 	/* disable irq */
2345 	imask = sky2_read32(hw, B0_IMSK);
2346 	imask &= ~Y2_IS_PHY_QLNK;
2347 	sky2_write32(hw, B0_IMSK, imask);
2348 
2349 	/* reset PHY Link Detect */
2350 	phy = sky2_pci_read16(hw, PSM_CONFIG_REG4);
2351 	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
2352 	sky2_pci_write16(hw, PSM_CONFIG_REG4, phy | 1);
2353 	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
2354 
2355 	sky2_link_up(sky2);
2356 }
2357 
2358 /* Transmit timeout is only called if we are running, carrier is up
2359  * and tx queue is full (stopped).
2360  */
2361 static void sky2_tx_timeout(struct net_device *dev, unsigned int txqueue)
2362 {
2363 	struct sky2_port *sky2 = netdev_priv(dev);
2364 	struct sky2_hw *hw = sky2->hw;
2365 
2366 	netif_err(sky2, timer, dev, "tx timeout\n");
2367 
2368 	netdev_printk(KERN_DEBUG, dev, "transmit ring %u .. %u report=%u done=%u\n",
2369 		      sky2->tx_cons, sky2->tx_prod,
2370 		      sky2_read16(hw, sky2->port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX),
2371 		      sky2_read16(hw, Q_ADDR(txqaddr[sky2->port], Q_DONE)));
2372 
2373 	/* can't restart safely under softirq */
2374 	schedule_work(&hw->restart_work);
2375 }
2376 
2377 static int sky2_change_mtu(struct net_device *dev, int new_mtu)
2378 {
2379 	struct sky2_port *sky2 = netdev_priv(dev);
2380 	struct sky2_hw *hw = sky2->hw;
2381 	unsigned port = sky2->port;
2382 	int err;
2383 	u16 ctl, mode;
2384 	u32 imask;
2385 
2386 	if (!netif_running(dev)) {
2387 		dev->mtu = new_mtu;
2388 		netdev_update_features(dev);
2389 		return 0;
2390 	}
2391 
2392 	imask = sky2_read32(hw, B0_IMSK);
2393 	sky2_write32(hw, B0_IMSK, 0);
2394 	sky2_read32(hw, B0_IMSK);
2395 
2396 	netif_trans_update(dev);	/* prevent tx timeout */
2397 	napi_disable(&hw->napi);
2398 	netif_tx_disable(dev);
2399 
2400 	synchronize_irq(hw->pdev->irq);
2401 
2402 	if (!(hw->flags & SKY2_HW_RAM_BUFFER))
2403 		sky2_set_tx_stfwd(hw, port);
2404 
2405 	ctl = gma_read16(hw, port, GM_GP_CTRL);
2406 	gma_write16(hw, port, GM_GP_CTRL, ctl & ~GM_GPCR_RX_ENA);
2407 	sky2_rx_stop(sky2);
2408 	sky2_rx_clean(sky2);
2409 
2410 	dev->mtu = new_mtu;
2411 	netdev_update_features(dev);
2412 
2413 	mode = DATA_BLIND_VAL(DATA_BLIND_DEF) |	GM_SMOD_VLAN_ENA;
2414 	if (sky2->speed > SPEED_100)
2415 		mode |= IPG_DATA_VAL(IPG_DATA_DEF_1000);
2416 	else
2417 		mode |= IPG_DATA_VAL(IPG_DATA_DEF_10_100);
2418 
2419 	if (dev->mtu > ETH_DATA_LEN)
2420 		mode |= GM_SMOD_JUMBO_ENA;
2421 
2422 	gma_write16(hw, port, GM_SERIAL_MODE, mode);
2423 
2424 	sky2_write8(hw, RB_ADDR(rxqaddr[port], RB_CTRL), RB_ENA_OP_MD);
2425 
2426 	err = sky2_alloc_rx_skbs(sky2);
2427 	if (!err)
2428 		sky2_rx_start(sky2);
2429 	else
2430 		sky2_rx_clean(sky2);
2431 	sky2_write32(hw, B0_IMSK, imask);
2432 
2433 	sky2_read32(hw, B0_Y2_SP_LISR);
2434 	napi_enable(&hw->napi);
2435 
2436 	if (err)
2437 		dev_close(dev);
2438 	else {
2439 		gma_write16(hw, port, GM_GP_CTRL, ctl);
2440 
2441 		netif_wake_queue(dev);
2442 	}
2443 
2444 	return err;
2445 }
2446 
2447 static inline bool needs_copy(const struct rx_ring_info *re,
2448 			      unsigned length)
2449 {
2450 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
2451 	/* Some architectures need the IP header to be aligned */
2452 	if (!IS_ALIGNED(re->data_addr + ETH_HLEN, sizeof(u32)))
2453 		return true;
2454 #endif
2455 	return length < copybreak;
2456 }
2457 
2458 /* For small just reuse existing skb for next receive */
2459 static struct sk_buff *receive_copy(struct sky2_port *sky2,
2460 				    const struct rx_ring_info *re,
2461 				    unsigned length)
2462 {
2463 	struct sk_buff *skb;
2464 
2465 	skb = netdev_alloc_skb_ip_align(sky2->netdev, length);
2466 	if (likely(skb)) {
2467 		dma_sync_single_for_cpu(&sky2->hw->pdev->dev, re->data_addr,
2468 					length, DMA_FROM_DEVICE);
2469 		skb_copy_from_linear_data(re->skb, skb->data, length);
2470 		skb->ip_summed = re->skb->ip_summed;
2471 		skb->csum = re->skb->csum;
2472 		skb_copy_hash(skb, re->skb);
2473 		__vlan_hwaccel_copy_tag(skb, re->skb);
2474 
2475 		dma_sync_single_for_device(&sky2->hw->pdev->dev,
2476 					   re->data_addr, length,
2477 					   DMA_FROM_DEVICE);
2478 		__vlan_hwaccel_clear_tag(re->skb);
2479 		skb_clear_hash(re->skb);
2480 		re->skb->ip_summed = CHECKSUM_NONE;
2481 		skb_put(skb, length);
2482 	}
2483 	return skb;
2484 }
2485 
2486 /* Adjust length of skb with fragments to match received data */
2487 static void skb_put_frags(struct sk_buff *skb, unsigned int hdr_space,
2488 			  unsigned int length)
2489 {
2490 	int i, num_frags;
2491 	unsigned int size;
2492 
2493 	/* put header into skb */
2494 	size = min(length, hdr_space);
2495 	skb->tail += size;
2496 	skb->len += size;
2497 	length -= size;
2498 
2499 	num_frags = skb_shinfo(skb)->nr_frags;
2500 	for (i = 0; i < num_frags; i++) {
2501 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2502 
2503 		if (length == 0) {
2504 			/* don't need this page */
2505 			__skb_frag_unref(frag, false);
2506 			--skb_shinfo(skb)->nr_frags;
2507 		} else {
2508 			size = min(length, (unsigned) PAGE_SIZE);
2509 
2510 			skb_frag_size_set(frag, size);
2511 			skb->data_len += size;
2512 			skb->truesize += PAGE_SIZE;
2513 			skb->len += size;
2514 			length -= size;
2515 		}
2516 	}
2517 }
2518 
2519 /* Normal packet - take skb from ring element and put in a new one  */
2520 static struct sk_buff *receive_new(struct sky2_port *sky2,
2521 				   struct rx_ring_info *re,
2522 				   unsigned int length)
2523 {
2524 	struct sk_buff *skb;
2525 	struct rx_ring_info nre;
2526 	unsigned hdr_space = sky2->rx_data_size;
2527 
2528 	nre.skb = sky2_rx_alloc(sky2, GFP_ATOMIC);
2529 	if (unlikely(!nre.skb))
2530 		goto nobuf;
2531 
2532 	if (sky2_rx_map_skb(sky2->hw->pdev, &nre, hdr_space))
2533 		goto nomap;
2534 
2535 	skb = re->skb;
2536 	sky2_rx_unmap_skb(sky2->hw->pdev, re);
2537 	prefetch(skb->data);
2538 	*re = nre;
2539 
2540 	if (skb_shinfo(skb)->nr_frags)
2541 		skb_put_frags(skb, hdr_space, length);
2542 	else
2543 		skb_put(skb, length);
2544 	return skb;
2545 
2546 nomap:
2547 	dev_kfree_skb(nre.skb);
2548 nobuf:
2549 	return NULL;
2550 }
2551 
2552 /*
2553  * Receive one packet.
2554  * For larger packets, get new buffer.
2555  */
2556 static struct sk_buff *sky2_receive(struct net_device *dev,
2557 				    u16 length, u32 status)
2558 {
2559 	struct sky2_port *sky2 = netdev_priv(dev);
2560 	struct rx_ring_info *re = sky2->rx_ring + sky2->rx_next;
2561 	struct sk_buff *skb = NULL;
2562 	u16 count = (status & GMR_FS_LEN) >> 16;
2563 
2564 	netif_printk(sky2, rx_status, KERN_DEBUG, dev,
2565 		     "rx slot %u status 0x%x len %d\n",
2566 		     sky2->rx_next, status, length);
2567 
2568 	sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending;
2569 	prefetch(sky2->rx_ring + sky2->rx_next);
2570 
2571 	if (skb_vlan_tag_present(re->skb))
2572 		count -= VLAN_HLEN;	/* Account for vlan tag */
2573 
2574 	/* This chip has hardware problems that generates bogus status.
2575 	 * So do only marginal checking and expect higher level protocols
2576 	 * to handle crap frames.
2577 	 */
2578 	if (sky2->hw->chip_id == CHIP_ID_YUKON_FE_P &&
2579 	    sky2->hw->chip_rev == CHIP_REV_YU_FE2_A0 &&
2580 	    length != count)
2581 		goto okay;
2582 
2583 	if (status & GMR_FS_ANY_ERR)
2584 		goto error;
2585 
2586 	if (!(status & GMR_FS_RX_OK))
2587 		goto resubmit;
2588 
2589 	/* if length reported by DMA does not match PHY, packet was truncated */
2590 	if (length != count)
2591 		goto error;
2592 
2593 okay:
2594 	if (needs_copy(re, length))
2595 		skb = receive_copy(sky2, re, length);
2596 	else
2597 		skb = receive_new(sky2, re, length);
2598 
2599 	dev->stats.rx_dropped += (skb == NULL);
2600 
2601 resubmit:
2602 	sky2_rx_submit(sky2, re);
2603 
2604 	return skb;
2605 
2606 error:
2607 	++dev->stats.rx_errors;
2608 
2609 	if (net_ratelimit())
2610 		netif_info(sky2, rx_err, dev,
2611 			   "rx error, status 0x%x length %d\n", status, length);
2612 
2613 	goto resubmit;
2614 }
2615 
2616 /* Transmit complete */
2617 static inline void sky2_tx_done(struct net_device *dev, u16 last)
2618 {
2619 	struct sky2_port *sky2 = netdev_priv(dev);
2620 
2621 	if (netif_running(dev)) {
2622 		sky2_tx_complete(sky2, last);
2623 
2624 		/* Wake unless it's detached, and called e.g. from sky2_close() */
2625 		if (tx_avail(sky2) > MAX_SKB_TX_LE + 4)
2626 			netif_wake_queue(dev);
2627 	}
2628 }
2629 
2630 static inline void sky2_skb_rx(const struct sky2_port *sky2,
2631 			       struct sk_buff *skb)
2632 {
2633 	if (skb->ip_summed == CHECKSUM_NONE)
2634 		netif_receive_skb(skb);
2635 	else
2636 		napi_gro_receive(&sky2->hw->napi, skb);
2637 }
2638 
2639 static inline void sky2_rx_done(struct sky2_hw *hw, unsigned port,
2640 				unsigned packets, unsigned bytes)
2641 {
2642 	struct net_device *dev = hw->dev[port];
2643 	struct sky2_port *sky2 = netdev_priv(dev);
2644 
2645 	if (packets == 0)
2646 		return;
2647 
2648 	u64_stats_update_begin(&sky2->rx_stats.syncp);
2649 	sky2->rx_stats.packets += packets;
2650 	sky2->rx_stats.bytes += bytes;
2651 	u64_stats_update_end(&sky2->rx_stats.syncp);
2652 
2653 	sky2->last_rx = jiffies;
2654 	sky2_rx_update(netdev_priv(dev), rxqaddr[port]);
2655 }
2656 
2657 static void sky2_rx_checksum(struct sky2_port *sky2, u32 status)
2658 {
2659 	/* If this happens then driver assuming wrong format for chip type */
2660 	BUG_ON(sky2->hw->flags & SKY2_HW_NEW_LE);
2661 
2662 	/* Both checksum counters are programmed to start at
2663 	 * the same offset, so unless there is a problem they
2664 	 * should match. This failure is an early indication that
2665 	 * hardware receive checksumming won't work.
2666 	 */
2667 	if (likely((u16)(status >> 16) == (u16)status)) {
2668 		struct sk_buff *skb = sky2->rx_ring[sky2->rx_next].skb;
2669 		skb->ip_summed = CHECKSUM_COMPLETE;
2670 		skb->csum = le16_to_cpu(status);
2671 	} else {
2672 		dev_notice(&sky2->hw->pdev->dev,
2673 			   "%s: receive checksum problem (status = %#x)\n",
2674 			   sky2->netdev->name, status);
2675 
2676 		/* Disable checksum offload
2677 		 * It will be reenabled on next ndo_set_features, but if it's
2678 		 * really broken, will get disabled again
2679 		 */
2680 		sky2->netdev->features &= ~NETIF_F_RXCSUM;
2681 		sky2_write32(sky2->hw, Q_ADDR(rxqaddr[sky2->port], Q_CSR),
2682 			     BMU_DIS_RX_CHKSUM);
2683 	}
2684 }
2685 
2686 static void sky2_rx_tag(struct sky2_port *sky2, u16 length)
2687 {
2688 	struct sk_buff *skb;
2689 
2690 	skb = sky2->rx_ring[sky2->rx_next].skb;
2691 	__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), be16_to_cpu(length));
2692 }
2693 
2694 static void sky2_rx_hash(struct sky2_port *sky2, u32 status)
2695 {
2696 	struct sk_buff *skb;
2697 
2698 	skb = sky2->rx_ring[sky2->rx_next].skb;
2699 	skb_set_hash(skb, le32_to_cpu(status), PKT_HASH_TYPE_L3);
2700 }
2701 
2702 /* Process status response ring */
2703 static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
2704 {
2705 	int work_done = 0;
2706 	unsigned int total_bytes[2] = { 0 };
2707 	unsigned int total_packets[2] = { 0 };
2708 
2709 	if (to_do <= 0)
2710 		return work_done;
2711 
2712 	rmb();
2713 	do {
2714 		struct sky2_port *sky2;
2715 		struct sky2_status_le *le  = hw->st_le + hw->st_idx;
2716 		unsigned port;
2717 		struct net_device *dev;
2718 		struct sk_buff *skb;
2719 		u32 status;
2720 		u16 length;
2721 		u8 opcode = le->opcode;
2722 
2723 		if (!(opcode & HW_OWNER))
2724 			break;
2725 
2726 		hw->st_idx = RING_NEXT(hw->st_idx, hw->st_size);
2727 
2728 		port = le->css & CSS_LINK_BIT;
2729 		dev = hw->dev[port];
2730 		sky2 = netdev_priv(dev);
2731 		length = le16_to_cpu(le->length);
2732 		status = le32_to_cpu(le->status);
2733 
2734 		le->opcode = 0;
2735 		switch (opcode & ~HW_OWNER) {
2736 		case OP_RXSTAT:
2737 			total_packets[port]++;
2738 			total_bytes[port] += length;
2739 
2740 			skb = sky2_receive(dev, length, status);
2741 			if (!skb)
2742 				break;
2743 
2744 			/* This chip reports checksum status differently */
2745 			if (hw->flags & SKY2_HW_NEW_LE) {
2746 				if ((dev->features & NETIF_F_RXCSUM) &&
2747 				    (le->css & (CSS_ISIPV4 | CSS_ISIPV6)) &&
2748 				    (le->css & CSS_TCPUDPCSOK))
2749 					skb->ip_summed = CHECKSUM_UNNECESSARY;
2750 				else
2751 					skb->ip_summed = CHECKSUM_NONE;
2752 			}
2753 
2754 			skb->protocol = eth_type_trans(skb, dev);
2755 			sky2_skb_rx(sky2, skb);
2756 
2757 			/* Stop after net poll weight */
2758 			if (++work_done >= to_do)
2759 				goto exit_loop;
2760 			break;
2761 
2762 		case OP_RXVLAN:
2763 			sky2_rx_tag(sky2, length);
2764 			break;
2765 
2766 		case OP_RXCHKSVLAN:
2767 			sky2_rx_tag(sky2, length);
2768 			fallthrough;
2769 		case OP_RXCHKS:
2770 			if (likely(dev->features & NETIF_F_RXCSUM))
2771 				sky2_rx_checksum(sky2, status);
2772 			break;
2773 
2774 		case OP_RSS_HASH:
2775 			sky2_rx_hash(sky2, status);
2776 			break;
2777 
2778 		case OP_TXINDEXLE:
2779 			/* TX index reports status for both ports */
2780 			sky2_tx_done(hw->dev[0], status & 0xfff);
2781 			if (hw->dev[1])
2782 				sky2_tx_done(hw->dev[1],
2783 				     ((status >> 24) & 0xff)
2784 					     | (u16)(length & 0xf) << 8);
2785 			break;
2786 
2787 		default:
2788 			if (net_ratelimit())
2789 				pr_warn("unknown status opcode 0x%x\n", opcode);
2790 		}
2791 	} while (hw->st_idx != idx);
2792 
2793 	/* Fully processed status ring so clear irq */
2794 	sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
2795 
2796 exit_loop:
2797 	sky2_rx_done(hw, 0, total_packets[0], total_bytes[0]);
2798 	sky2_rx_done(hw, 1, total_packets[1], total_bytes[1]);
2799 
2800 	return work_done;
2801 }
2802 
2803 static void sky2_hw_error(struct sky2_hw *hw, unsigned port, u32 status)
2804 {
2805 	struct net_device *dev = hw->dev[port];
2806 
2807 	if (net_ratelimit())
2808 		netdev_info(dev, "hw error interrupt status 0x%x\n", status);
2809 
2810 	if (status & Y2_IS_PAR_RD1) {
2811 		if (net_ratelimit())
2812 			netdev_err(dev, "ram data read parity error\n");
2813 		/* Clear IRQ */
2814 		sky2_write16(hw, RAM_BUFFER(port, B3_RI_CTRL), RI_CLR_RD_PERR);
2815 	}
2816 
2817 	if (status & Y2_IS_PAR_WR1) {
2818 		if (net_ratelimit())
2819 			netdev_err(dev, "ram data write parity error\n");
2820 
2821 		sky2_write16(hw, RAM_BUFFER(port, B3_RI_CTRL), RI_CLR_WR_PERR);
2822 	}
2823 
2824 	if (status & Y2_IS_PAR_MAC1) {
2825 		if (net_ratelimit())
2826 			netdev_err(dev, "MAC parity error\n");
2827 		sky2_write8(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_CLI_TX_PE);
2828 	}
2829 
2830 	if (status & Y2_IS_PAR_RX1) {
2831 		if (net_ratelimit())
2832 			netdev_err(dev, "RX parity error\n");
2833 		sky2_write32(hw, Q_ADDR(rxqaddr[port], Q_CSR), BMU_CLR_IRQ_PAR);
2834 	}
2835 
2836 	if (status & Y2_IS_TCP_TXA1) {
2837 		if (net_ratelimit())
2838 			netdev_err(dev, "TCP segmentation error\n");
2839 		sky2_write32(hw, Q_ADDR(txqaddr[port], Q_CSR), BMU_CLR_IRQ_TCP);
2840 	}
2841 }
2842 
2843 static void sky2_hw_intr(struct sky2_hw *hw)
2844 {
2845 	struct pci_dev *pdev = hw->pdev;
2846 	u32 status = sky2_read32(hw, B0_HWE_ISRC);
2847 	u32 hwmsk = sky2_read32(hw, B0_HWE_IMSK);
2848 
2849 	status &= hwmsk;
2850 
2851 	if (status & Y2_IS_TIST_OV)
2852 		sky2_write8(hw, GMAC_TI_ST_CTRL, GMT_ST_CLR_IRQ);
2853 
2854 	if (status & (Y2_IS_MST_ERR | Y2_IS_IRQ_STAT)) {
2855 		u16 pci_err;
2856 
2857 		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
2858 		pci_err = sky2_pci_read16(hw, PCI_STATUS);
2859 		if (net_ratelimit())
2860 			dev_err(&pdev->dev, "PCI hardware error (0x%x)\n",
2861 			        pci_err);
2862 
2863 		sky2_pci_write16(hw, PCI_STATUS,
2864 				      pci_err | PCI_STATUS_ERROR_BITS);
2865 		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
2866 	}
2867 
2868 	if (status & Y2_IS_PCI_EXP) {
2869 		/* PCI-Express uncorrectable Error occurred */
2870 		u32 err;
2871 
2872 		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
2873 		err = sky2_read32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS);
2874 		sky2_write32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS,
2875 			     0xfffffffful);
2876 		if (net_ratelimit())
2877 			dev_err(&pdev->dev, "PCI Express error (0x%x)\n", err);
2878 
2879 		sky2_read32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS);
2880 		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
2881 	}
2882 
2883 	if (status & Y2_HWE_L1_MASK)
2884 		sky2_hw_error(hw, 0, status);
2885 	status >>= 8;
2886 	if (status & Y2_HWE_L1_MASK)
2887 		sky2_hw_error(hw, 1, status);
2888 }
2889 
2890 static void sky2_mac_intr(struct sky2_hw *hw, unsigned port)
2891 {
2892 	struct net_device *dev = hw->dev[port];
2893 	struct sky2_port *sky2 = netdev_priv(dev);
2894 	u8 status = sky2_read8(hw, SK_REG(port, GMAC_IRQ_SRC));
2895 
2896 	netif_info(sky2, intr, dev, "mac interrupt status 0x%x\n", status);
2897 
2898 	if (status & GM_IS_RX_CO_OV)
2899 		gma_read16(hw, port, GM_RX_IRQ_SRC);
2900 
2901 	if (status & GM_IS_TX_CO_OV)
2902 		gma_read16(hw, port, GM_TX_IRQ_SRC);
2903 
2904 	if (status & GM_IS_RX_FF_OR) {
2905 		++dev->stats.rx_fifo_errors;
2906 		sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_CLI_RX_FO);
2907 	}
2908 
2909 	if (status & GM_IS_TX_FF_UR) {
2910 		++dev->stats.tx_fifo_errors;
2911 		sky2_write8(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_CLI_TX_FU);
2912 	}
2913 }
2914 
2915 /* This should never happen it is a bug. */
2916 static void sky2_le_error(struct sky2_hw *hw, unsigned port, u16 q)
2917 {
2918 	struct net_device *dev = hw->dev[port];
2919 	u16 idx = sky2_read16(hw, Y2_QADDR(q, PREF_UNIT_GET_IDX));
2920 
2921 	dev_err(&hw->pdev->dev, "%s: descriptor error q=%#x get=%u put=%u\n",
2922 		dev->name, (unsigned) q, (unsigned) idx,
2923 		(unsigned) sky2_read16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX)));
2924 
2925 	sky2_write32(hw, Q_ADDR(q, Q_CSR), BMU_CLR_IRQ_CHK);
2926 }
2927 
2928 static int sky2_rx_hung(struct net_device *dev)
2929 {
2930 	struct sky2_port *sky2 = netdev_priv(dev);
2931 	struct sky2_hw *hw = sky2->hw;
2932 	unsigned port = sky2->port;
2933 	unsigned rxq = rxqaddr[port];
2934 	u32 mac_rp = sky2_read32(hw, SK_REG(port, RX_GMF_RP));
2935 	u8 mac_lev = sky2_read8(hw, SK_REG(port, RX_GMF_RLEV));
2936 	u8 fifo_rp = sky2_read8(hw, Q_ADDR(rxq, Q_RP));
2937 	u8 fifo_lev = sky2_read8(hw, Q_ADDR(rxq, Q_RL));
2938 
2939 	/* If idle and MAC or PCI is stuck */
2940 	if (sky2->check.last == sky2->last_rx &&
2941 	    ((mac_rp == sky2->check.mac_rp &&
2942 	      mac_lev != 0 && mac_lev >= sky2->check.mac_lev) ||
2943 	     /* Check if the PCI RX hang */
2944 	     (fifo_rp == sky2->check.fifo_rp &&
2945 	      fifo_lev != 0 && fifo_lev >= sky2->check.fifo_lev))) {
2946 		netdev_printk(KERN_DEBUG, dev,
2947 			      "hung mac %d:%d fifo %d (%d:%d)\n",
2948 			      mac_lev, mac_rp, fifo_lev,
2949 			      fifo_rp, sky2_read8(hw, Q_ADDR(rxq, Q_WP)));
2950 		return 1;
2951 	} else {
2952 		sky2->check.last = sky2->last_rx;
2953 		sky2->check.mac_rp = mac_rp;
2954 		sky2->check.mac_lev = mac_lev;
2955 		sky2->check.fifo_rp = fifo_rp;
2956 		sky2->check.fifo_lev = fifo_lev;
2957 		return 0;
2958 	}
2959 }
2960 
2961 static void sky2_watchdog(struct timer_list *t)
2962 {
2963 	struct sky2_hw *hw = from_timer(hw, t, watchdog_timer);
2964 
2965 	/* Check for lost IRQ once a second */
2966 	if (sky2_read32(hw, B0_ISRC)) {
2967 		napi_schedule(&hw->napi);
2968 	} else {
2969 		int i, active = 0;
2970 
2971 		for (i = 0; i < hw->ports; i++) {
2972 			struct net_device *dev = hw->dev[i];
2973 			if (!netif_running(dev))
2974 				continue;
2975 			++active;
2976 
2977 			/* For chips with Rx FIFO, check if stuck */
2978 			if ((hw->flags & SKY2_HW_RAM_BUFFER) &&
2979 			     sky2_rx_hung(dev)) {
2980 				netdev_info(dev, "receiver hang detected\n");
2981 				schedule_work(&hw->restart_work);
2982 				return;
2983 			}
2984 		}
2985 
2986 		if (active == 0)
2987 			return;
2988 	}
2989 
2990 	mod_timer(&hw->watchdog_timer, round_jiffies(jiffies + HZ));
2991 }
2992 
2993 /* Hardware/software error handling */
2994 static void sky2_err_intr(struct sky2_hw *hw, u32 status)
2995 {
2996 	if (net_ratelimit())
2997 		dev_warn(&hw->pdev->dev, "error interrupt status=%#x\n", status);
2998 
2999 	if (status & Y2_IS_HW_ERR)
3000 		sky2_hw_intr(hw);
3001 
3002 	if (status & Y2_IS_IRQ_MAC1)
3003 		sky2_mac_intr(hw, 0);
3004 
3005 	if (status & Y2_IS_IRQ_MAC2)
3006 		sky2_mac_intr(hw, 1);
3007 
3008 	if (status & Y2_IS_CHK_RX1)
3009 		sky2_le_error(hw, 0, Q_R1);
3010 
3011 	if (status & Y2_IS_CHK_RX2)
3012 		sky2_le_error(hw, 1, Q_R2);
3013 
3014 	if (status & Y2_IS_CHK_TXA1)
3015 		sky2_le_error(hw, 0, Q_XA1);
3016 
3017 	if (status & Y2_IS_CHK_TXA2)
3018 		sky2_le_error(hw, 1, Q_XA2);
3019 }
3020 
3021 static int sky2_poll(struct napi_struct *napi, int work_limit)
3022 {
3023 	struct sky2_hw *hw = container_of(napi, struct sky2_hw, napi);
3024 	u32 status = sky2_read32(hw, B0_Y2_SP_EISR);
3025 	int work_done = 0;
3026 	u16 idx;
3027 
3028 	if (unlikely(status & Y2_IS_ERROR))
3029 		sky2_err_intr(hw, status);
3030 
3031 	if (status & Y2_IS_IRQ_PHY1)
3032 		sky2_phy_intr(hw, 0);
3033 
3034 	if (status & Y2_IS_IRQ_PHY2)
3035 		sky2_phy_intr(hw, 1);
3036 
3037 	if (status & Y2_IS_PHY_QLNK)
3038 		sky2_qlink_intr(hw);
3039 
3040 	while ((idx = sky2_read16(hw, STAT_PUT_IDX)) != hw->st_idx) {
3041 		work_done += sky2_status_intr(hw, work_limit - work_done, idx);
3042 
3043 		if (work_done >= work_limit)
3044 			goto done;
3045 	}
3046 
3047 	napi_complete_done(napi, work_done);
3048 	sky2_read32(hw, B0_Y2_SP_LISR);
3049 done:
3050 
3051 	return work_done;
3052 }
3053 
3054 static irqreturn_t sky2_intr(int irq, void *dev_id)
3055 {
3056 	struct sky2_hw *hw = dev_id;
3057 	u32 status;
3058 
3059 	/* Reading this mask interrupts as side effect */
3060 	status = sky2_read32(hw, B0_Y2_SP_ISRC2);
3061 	if (status == 0 || status == ~0) {
3062 		sky2_write32(hw, B0_Y2_SP_ICR, 2);
3063 		return IRQ_NONE;
3064 	}
3065 
3066 	prefetch(&hw->st_le[hw->st_idx]);
3067 
3068 	napi_schedule(&hw->napi);
3069 
3070 	return IRQ_HANDLED;
3071 }
3072 
3073 #ifdef CONFIG_NET_POLL_CONTROLLER
3074 static void sky2_netpoll(struct net_device *dev)
3075 {
3076 	struct sky2_port *sky2 = netdev_priv(dev);
3077 
3078 	napi_schedule(&sky2->hw->napi);
3079 }
3080 #endif
3081 
3082 /* Chip internal frequency for clock calculations */
3083 static u32 sky2_mhz(const struct sky2_hw *hw)
3084 {
3085 	switch (hw->chip_id) {
3086 	case CHIP_ID_YUKON_EC:
3087 	case CHIP_ID_YUKON_EC_U:
3088 	case CHIP_ID_YUKON_EX:
3089 	case CHIP_ID_YUKON_SUPR:
3090 	case CHIP_ID_YUKON_UL_2:
3091 	case CHIP_ID_YUKON_OPT:
3092 	case CHIP_ID_YUKON_PRM:
3093 	case CHIP_ID_YUKON_OP_2:
3094 		return 125;
3095 
3096 	case CHIP_ID_YUKON_FE:
3097 		return 100;
3098 
3099 	case CHIP_ID_YUKON_FE_P:
3100 		return 50;
3101 
3102 	case CHIP_ID_YUKON_XL:
3103 		return 156;
3104 
3105 	default:
3106 		BUG();
3107 	}
3108 }
3109 
3110 static inline u32 sky2_us2clk(const struct sky2_hw *hw, u32 us)
3111 {
3112 	return sky2_mhz(hw) * us;
3113 }
3114 
3115 static inline u32 sky2_clk2us(const struct sky2_hw *hw, u32 clk)
3116 {
3117 	return clk / sky2_mhz(hw);
3118 }
3119 
3120 
3121 static int sky2_init(struct sky2_hw *hw)
3122 {
3123 	u8 t8;
3124 
3125 	/* Enable all clocks and check for bad PCI access */
3126 	sky2_pci_write32(hw, PCI_DEV_REG3, 0);
3127 
3128 	sky2_write8(hw, B0_CTST, CS_RST_CLR);
3129 
3130 	hw->chip_id = sky2_read8(hw, B2_CHIP_ID);
3131 	hw->chip_rev = (sky2_read8(hw, B2_MAC_CFG) & CFG_CHIP_R_MSK) >> 4;
3132 
3133 	switch (hw->chip_id) {
3134 	case CHIP_ID_YUKON_XL:
3135 		hw->flags = SKY2_HW_GIGABIT | SKY2_HW_NEWER_PHY;
3136 		if (hw->chip_rev < CHIP_REV_YU_XL_A2)
3137 			hw->flags |= SKY2_HW_RSS_BROKEN;
3138 		break;
3139 
3140 	case CHIP_ID_YUKON_EC_U:
3141 		hw->flags = SKY2_HW_GIGABIT
3142 			| SKY2_HW_NEWER_PHY
3143 			| SKY2_HW_ADV_POWER_CTL;
3144 		break;
3145 
3146 	case CHIP_ID_YUKON_EX:
3147 		hw->flags = SKY2_HW_GIGABIT
3148 			| SKY2_HW_NEWER_PHY
3149 			| SKY2_HW_NEW_LE
3150 			| SKY2_HW_ADV_POWER_CTL
3151 			| SKY2_HW_RSS_CHKSUM;
3152 
3153 		/* New transmit checksum */
3154 		if (hw->chip_rev != CHIP_REV_YU_EX_B0)
3155 			hw->flags |= SKY2_HW_AUTO_TX_SUM;
3156 		break;
3157 
3158 	case CHIP_ID_YUKON_EC:
3159 		/* This rev is really old, and requires untested workarounds */
3160 		if (hw->chip_rev == CHIP_REV_YU_EC_A1) {
3161 			dev_err(&hw->pdev->dev, "unsupported revision Yukon-EC rev A1\n");
3162 			return -EOPNOTSUPP;
3163 		}
3164 		hw->flags = SKY2_HW_GIGABIT | SKY2_HW_RSS_BROKEN;
3165 		break;
3166 
3167 	case CHIP_ID_YUKON_FE:
3168 		hw->flags = SKY2_HW_RSS_BROKEN;
3169 		break;
3170 
3171 	case CHIP_ID_YUKON_FE_P:
3172 		hw->flags = SKY2_HW_NEWER_PHY
3173 			| SKY2_HW_NEW_LE
3174 			| SKY2_HW_AUTO_TX_SUM
3175 			| SKY2_HW_ADV_POWER_CTL;
3176 
3177 		/* The workaround for status conflicts VLAN tag detection. */
3178 		if (hw->chip_rev == CHIP_REV_YU_FE2_A0)
3179 			hw->flags |= SKY2_HW_VLAN_BROKEN | SKY2_HW_RSS_CHKSUM;
3180 		break;
3181 
3182 	case CHIP_ID_YUKON_SUPR:
3183 		hw->flags = SKY2_HW_GIGABIT
3184 			| SKY2_HW_NEWER_PHY
3185 			| SKY2_HW_NEW_LE
3186 			| SKY2_HW_AUTO_TX_SUM
3187 			| SKY2_HW_ADV_POWER_CTL;
3188 
3189 		if (hw->chip_rev == CHIP_REV_YU_SU_A0)
3190 			hw->flags |= SKY2_HW_RSS_CHKSUM;
3191 		break;
3192 
3193 	case CHIP_ID_YUKON_UL_2:
3194 		hw->flags = SKY2_HW_GIGABIT
3195 			| SKY2_HW_ADV_POWER_CTL;
3196 		break;
3197 
3198 	case CHIP_ID_YUKON_OPT:
3199 	case CHIP_ID_YUKON_PRM:
3200 	case CHIP_ID_YUKON_OP_2:
3201 		hw->flags = SKY2_HW_GIGABIT
3202 			| SKY2_HW_NEW_LE
3203 			| SKY2_HW_ADV_POWER_CTL;
3204 		break;
3205 
3206 	default:
3207 		dev_err(&hw->pdev->dev, "unsupported chip type 0x%x\n",
3208 			hw->chip_id);
3209 		return -EOPNOTSUPP;
3210 	}
3211 
3212 	hw->pmd_type = sky2_read8(hw, B2_PMD_TYP);
3213 	if (hw->pmd_type == 'L' || hw->pmd_type == 'S' || hw->pmd_type == 'P')
3214 		hw->flags |= SKY2_HW_FIBRE_PHY;
3215 
3216 	hw->ports = 1;
3217 	t8 = sky2_read8(hw, B2_Y2_HW_RES);
3218 	if ((t8 & CFG_DUAL_MAC_MSK) == CFG_DUAL_MAC_MSK) {
3219 		if (!(sky2_read8(hw, B2_Y2_CLK_GATE) & Y2_STATUS_LNK2_INAC))
3220 			++hw->ports;
3221 	}
3222 
3223 	if (sky2_read8(hw, B2_E_0))
3224 		hw->flags |= SKY2_HW_RAM_BUFFER;
3225 
3226 	return 0;
3227 }
3228 
3229 static void sky2_reset(struct sky2_hw *hw)
3230 {
3231 	struct pci_dev *pdev = hw->pdev;
3232 	u16 status;
3233 	int i;
3234 	u32 hwe_mask = Y2_HWE_ALL_MASK;
3235 
3236 	/* disable ASF */
3237 	if (hw->chip_id == CHIP_ID_YUKON_EX
3238 	    || hw->chip_id == CHIP_ID_YUKON_SUPR) {
3239 		sky2_write32(hw, CPU_WDOG, 0);
3240 		status = sky2_read16(hw, HCU_CCSR);
3241 		status &= ~(HCU_CCSR_AHB_RST | HCU_CCSR_CPU_RST_MODE |
3242 			    HCU_CCSR_UC_STATE_MSK);
3243 		/*
3244 		 * CPU clock divider shouldn't be used because
3245 		 * - ASF firmware may malfunction
3246 		 * - Yukon-Supreme: Parallel FLASH doesn't support divided clocks
3247 		 */
3248 		status &= ~HCU_CCSR_CPU_CLK_DIVIDE_MSK;
3249 		sky2_write16(hw, HCU_CCSR, status);
3250 		sky2_write32(hw, CPU_WDOG, 0);
3251 	} else
3252 		sky2_write8(hw, B28_Y2_ASF_STAT_CMD, Y2_ASF_RESET);
3253 	sky2_write16(hw, B0_CTST, Y2_ASF_DISABLE);
3254 
3255 	/* do a SW reset */
3256 	sky2_write8(hw, B0_CTST, CS_RST_SET);
3257 	sky2_write8(hw, B0_CTST, CS_RST_CLR);
3258 
3259 	/* allow writes to PCI config */
3260 	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
3261 
3262 	/* clear PCI errors, if any */
3263 	status = sky2_pci_read16(hw, PCI_STATUS);
3264 	status |= PCI_STATUS_ERROR_BITS;
3265 	sky2_pci_write16(hw, PCI_STATUS, status);
3266 
3267 	sky2_write8(hw, B0_CTST, CS_MRST_CLR);
3268 
3269 	if (pci_is_pcie(pdev)) {
3270 		sky2_write32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS,
3271 			     0xfffffffful);
3272 
3273 		/* If error bit is stuck on ignore it */
3274 		if (sky2_read32(hw, B0_HWE_ISRC) & Y2_IS_PCI_EXP)
3275 			dev_info(&pdev->dev, "ignoring stuck error report bit\n");
3276 		else
3277 			hwe_mask |= Y2_IS_PCI_EXP;
3278 	}
3279 
3280 	sky2_power_on(hw);
3281 	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
3282 
3283 	for (i = 0; i < hw->ports; i++) {
3284 		sky2_write8(hw, SK_REG(i, GMAC_LINK_CTRL), GMLC_RST_SET);
3285 		sky2_write8(hw, SK_REG(i, GMAC_LINK_CTRL), GMLC_RST_CLR);
3286 
3287 		if (hw->chip_id == CHIP_ID_YUKON_EX ||
3288 		    hw->chip_id == CHIP_ID_YUKON_SUPR)
3289 			sky2_write16(hw, SK_REG(i, GMAC_CTRL),
3290 				     GMC_BYP_MACSECRX_ON | GMC_BYP_MACSECTX_ON
3291 				     | GMC_BYP_RETR_ON);
3292 
3293 	}
3294 
3295 	if (hw->chip_id == CHIP_ID_YUKON_SUPR && hw->chip_rev > CHIP_REV_YU_SU_B0) {
3296 		/* enable MACSec clock gating */
3297 		sky2_pci_write32(hw, PCI_DEV_REG3, P_CLK_MACSEC_DIS);
3298 	}
3299 
3300 	if (hw->chip_id == CHIP_ID_YUKON_OPT ||
3301 	    hw->chip_id == CHIP_ID_YUKON_PRM ||
3302 	    hw->chip_id == CHIP_ID_YUKON_OP_2) {
3303 		u16 reg;
3304 
3305 		if (hw->chip_id == CHIP_ID_YUKON_OPT && hw->chip_rev == 0) {
3306 			/* disable PCI-E PHY power down (set PHY reg 0x80, bit 7 */
3307 			sky2_write32(hw, Y2_PEX_PHY_DATA, (0x80UL << 16) | (1 << 7));
3308 
3309 			/* set PHY Link Detect Timer to 1.1 second (11x 100ms) */
3310 			reg = 10;
3311 
3312 			/* re-enable PEX PM in PEX PHY debug reg. 8 (clear bit 12) */
3313 			sky2_write32(hw, Y2_PEX_PHY_DATA, PEX_DB_ACCESS | (0x08UL << 16));
3314 		} else {
3315 			/* set PHY Link Detect Timer to 0.4 second (4x 100ms) */
3316 			reg = 3;
3317 		}
3318 
3319 		reg <<= PSM_CONFIG_REG4_TIMER_PHY_LINK_DETECT_BASE;
3320 		reg |= PSM_CONFIG_REG4_RST_PHY_LINK_DETECT;
3321 
3322 		/* reset PHY Link Detect */
3323 		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
3324 		sky2_pci_write16(hw, PSM_CONFIG_REG4, reg);
3325 
3326 		/* check if PSMv2 was running before */
3327 		reg = sky2_pci_read16(hw, PSM_CONFIG_REG3);
3328 		if (reg & PCI_EXP_LNKCTL_ASPMC)
3329 			/* restore the PCIe Link Control register */
3330 			sky2_pci_write16(hw, pdev->pcie_cap + PCI_EXP_LNKCTL,
3331 					 reg);
3332 
3333 		if (hw->chip_id == CHIP_ID_YUKON_PRM &&
3334 			hw->chip_rev == CHIP_REV_YU_PRM_A0) {
3335 			/* change PHY Interrupt polarity to low active */
3336 			reg = sky2_read16(hw, GPHY_CTRL);
3337 			sky2_write16(hw, GPHY_CTRL, reg | GPC_INTPOL);
3338 
3339 			/* adapt HW for low active PHY Interrupt */
3340 			reg = sky2_read16(hw, Y2_CFG_SPC + PCI_LDO_CTRL);
3341 			sky2_write16(hw, Y2_CFG_SPC + PCI_LDO_CTRL, reg | PHY_M_UNDOC1);
3342 		}
3343 
3344 		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
3345 
3346 		/* re-enable PEX PM in PEX PHY debug reg. 8 (clear bit 12) */
3347 		sky2_write32(hw, Y2_PEX_PHY_DATA, PEX_DB_ACCESS | (0x08UL << 16));
3348 	}
3349 
3350 	/* Clear I2C IRQ noise */
3351 	sky2_write32(hw, B2_I2C_IRQ, 1);
3352 
3353 	/* turn off hardware timer (unused) */
3354 	sky2_write8(hw, B2_TI_CTRL, TIM_STOP);
3355 	sky2_write8(hw, B2_TI_CTRL, TIM_CLR_IRQ);
3356 
3357 	/* Turn off descriptor polling */
3358 	sky2_write32(hw, B28_DPT_CTRL, DPT_STOP);
3359 
3360 	/* Turn off receive timestamp */
3361 	sky2_write8(hw, GMAC_TI_ST_CTRL, GMT_ST_STOP);
3362 	sky2_write8(hw, GMAC_TI_ST_CTRL, GMT_ST_CLR_IRQ);
3363 
3364 	/* enable the Tx Arbiters */
3365 	for (i = 0; i < hw->ports; i++)
3366 		sky2_write8(hw, SK_REG(i, TXA_CTRL), TXA_ENA_ARB);
3367 
3368 	/* Initialize ram interface */
3369 	for (i = 0; i < hw->ports; i++) {
3370 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_CTRL), RI_RST_CLR);
3371 
3372 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_WTO_R1), SK_RI_TO_53);
3373 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_WTO_XA1), SK_RI_TO_53);
3374 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_WTO_XS1), SK_RI_TO_53);
3375 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_RTO_R1), SK_RI_TO_53);
3376 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_RTO_XA1), SK_RI_TO_53);
3377 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_RTO_XS1), SK_RI_TO_53);
3378 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_WTO_R2), SK_RI_TO_53);
3379 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_WTO_XA2), SK_RI_TO_53);
3380 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_WTO_XS2), SK_RI_TO_53);
3381 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_RTO_R2), SK_RI_TO_53);
3382 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_RTO_XA2), SK_RI_TO_53);
3383 		sky2_write8(hw, RAM_BUFFER(i, B3_RI_RTO_XS2), SK_RI_TO_53);
3384 	}
3385 
3386 	sky2_write32(hw, B0_HWE_IMSK, hwe_mask);
3387 
3388 	for (i = 0; i < hw->ports; i++)
3389 		sky2_gmac_reset(hw, i);
3390 
3391 	memset(hw->st_le, 0, hw->st_size * sizeof(struct sky2_status_le));
3392 	hw->st_idx = 0;
3393 
3394 	sky2_write32(hw, STAT_CTRL, SC_STAT_RST_SET);
3395 	sky2_write32(hw, STAT_CTRL, SC_STAT_RST_CLR);
3396 
3397 	sky2_write32(hw, STAT_LIST_ADDR_LO, hw->st_dma);
3398 	sky2_write32(hw, STAT_LIST_ADDR_HI, (u64) hw->st_dma >> 32);
3399 
3400 	/* Set the list last index */
3401 	sky2_write16(hw, STAT_LAST_IDX, hw->st_size - 1);
3402 
3403 	sky2_write16(hw, STAT_TX_IDX_TH, 10);
3404 	sky2_write8(hw, STAT_FIFO_WM, 16);
3405 
3406 	/* set Status-FIFO ISR watermark */
3407 	if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev == 0)
3408 		sky2_write8(hw, STAT_FIFO_ISR_WM, 4);
3409 	else
3410 		sky2_write8(hw, STAT_FIFO_ISR_WM, 16);
3411 
3412 	sky2_write32(hw, STAT_TX_TIMER_INI, sky2_us2clk(hw, 1000));
3413 	sky2_write32(hw, STAT_ISR_TIMER_INI, sky2_us2clk(hw, 20));
3414 	sky2_write32(hw, STAT_LEV_TIMER_INI, sky2_us2clk(hw, 100));
3415 
3416 	/* enable status unit */
3417 	sky2_write32(hw, STAT_CTRL, SC_STAT_OP_ON);
3418 
3419 	sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START);
3420 	sky2_write8(hw, STAT_LEV_TIMER_CTRL, TIM_START);
3421 	sky2_write8(hw, STAT_ISR_TIMER_CTRL, TIM_START);
3422 }
3423 
3424 /* Take device down (offline).
3425  * Equivalent to doing dev_stop() but this does not
3426  * inform upper layers of the transition.
3427  */
3428 static void sky2_detach(struct net_device *dev)
3429 {
3430 	if (netif_running(dev)) {
3431 		netif_tx_lock(dev);
3432 		netif_device_detach(dev);	/* stop txq */
3433 		netif_tx_unlock(dev);
3434 		sky2_close(dev);
3435 	}
3436 }
3437 
3438 /* Bring device back after doing sky2_detach */
3439 static int sky2_reattach(struct net_device *dev)
3440 {
3441 	int err = 0;
3442 
3443 	if (netif_running(dev)) {
3444 		err = sky2_open(dev);
3445 		if (err) {
3446 			netdev_info(dev, "could not restart %d\n", err);
3447 			dev_close(dev);
3448 		} else {
3449 			netif_device_attach(dev);
3450 			sky2_set_multicast(dev);
3451 		}
3452 	}
3453 
3454 	return err;
3455 }
3456 
3457 static void sky2_all_down(struct sky2_hw *hw)
3458 {
3459 	int i;
3460 
3461 	if (hw->flags & SKY2_HW_IRQ_SETUP) {
3462 		sky2_write32(hw, B0_IMSK, 0);
3463 		sky2_read32(hw, B0_IMSK);
3464 
3465 		synchronize_irq(hw->pdev->irq);
3466 		napi_disable(&hw->napi);
3467 	}
3468 
3469 	for (i = 0; i < hw->ports; i++) {
3470 		struct net_device *dev = hw->dev[i];
3471 		struct sky2_port *sky2 = netdev_priv(dev);
3472 
3473 		if (!netif_running(dev))
3474 			continue;
3475 
3476 		netif_carrier_off(dev);
3477 		netif_tx_disable(dev);
3478 		sky2_hw_down(sky2);
3479 	}
3480 }
3481 
3482 static void sky2_all_up(struct sky2_hw *hw)
3483 {
3484 	u32 imask = Y2_IS_BASE;
3485 	int i;
3486 
3487 	for (i = 0; i < hw->ports; i++) {
3488 		struct net_device *dev = hw->dev[i];
3489 		struct sky2_port *sky2 = netdev_priv(dev);
3490 
3491 		if (!netif_running(dev))
3492 			continue;
3493 
3494 		sky2_hw_up(sky2);
3495 		sky2_set_multicast(dev);
3496 		imask |= portirq_msk[i];
3497 		netif_wake_queue(dev);
3498 	}
3499 
3500 	if (hw->flags & SKY2_HW_IRQ_SETUP) {
3501 		sky2_write32(hw, B0_IMSK, imask);
3502 		sky2_read32(hw, B0_IMSK);
3503 		sky2_read32(hw, B0_Y2_SP_LISR);
3504 		napi_enable(&hw->napi);
3505 	}
3506 }
3507 
3508 static void sky2_restart(struct work_struct *work)
3509 {
3510 	struct sky2_hw *hw = container_of(work, struct sky2_hw, restart_work);
3511 
3512 	rtnl_lock();
3513 
3514 	sky2_all_down(hw);
3515 	sky2_reset(hw);
3516 	sky2_all_up(hw);
3517 
3518 	rtnl_unlock();
3519 }
3520 
3521 static inline u8 sky2_wol_supported(const struct sky2_hw *hw)
3522 {
3523 	return sky2_is_copper(hw) ? (WAKE_PHY | WAKE_MAGIC) : 0;
3524 }
3525 
3526 static void sky2_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
3527 {
3528 	const struct sky2_port *sky2 = netdev_priv(dev);
3529 
3530 	wol->supported = sky2_wol_supported(sky2->hw);
3531 	wol->wolopts = sky2->wol;
3532 }
3533 
3534 static int sky2_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
3535 {
3536 	struct sky2_port *sky2 = netdev_priv(dev);
3537 	struct sky2_hw *hw = sky2->hw;
3538 	bool enable_wakeup = false;
3539 	int i;
3540 
3541 	if ((wol->wolopts & ~sky2_wol_supported(sky2->hw)) ||
3542 	    !device_can_wakeup(&hw->pdev->dev))
3543 		return -EOPNOTSUPP;
3544 
3545 	sky2->wol = wol->wolopts;
3546 
3547 	for (i = 0; i < hw->ports; i++) {
3548 		struct net_device *dev = hw->dev[i];
3549 		struct sky2_port *sky2 = netdev_priv(dev);
3550 
3551 		if (sky2->wol)
3552 			enable_wakeup = true;
3553 	}
3554 	device_set_wakeup_enable(&hw->pdev->dev, enable_wakeup);
3555 
3556 	return 0;
3557 }
3558 
3559 static u32 sky2_supported_modes(const struct sky2_hw *hw)
3560 {
3561 	if (sky2_is_copper(hw)) {
3562 		u32 modes = SUPPORTED_10baseT_Half
3563 			| SUPPORTED_10baseT_Full
3564 			| SUPPORTED_100baseT_Half
3565 			| SUPPORTED_100baseT_Full;
3566 
3567 		if (hw->flags & SKY2_HW_GIGABIT)
3568 			modes |= SUPPORTED_1000baseT_Half
3569 				| SUPPORTED_1000baseT_Full;
3570 		return modes;
3571 	} else
3572 		return SUPPORTED_1000baseT_Half
3573 			| SUPPORTED_1000baseT_Full;
3574 }
3575 
3576 static int sky2_get_link_ksettings(struct net_device *dev,
3577 				   struct ethtool_link_ksettings *cmd)
3578 {
3579 	struct sky2_port *sky2 = netdev_priv(dev);
3580 	struct sky2_hw *hw = sky2->hw;
3581 	u32 supported, advertising;
3582 
3583 	supported = sky2_supported_modes(hw);
3584 	cmd->base.phy_address = PHY_ADDR_MARV;
3585 	if (sky2_is_copper(hw)) {
3586 		cmd->base.port = PORT_TP;
3587 		cmd->base.speed = sky2->speed;
3588 		supported |=  SUPPORTED_Autoneg | SUPPORTED_TP;
3589 	} else {
3590 		cmd->base.speed = SPEED_1000;
3591 		cmd->base.port = PORT_FIBRE;
3592 		supported |=  SUPPORTED_Autoneg | SUPPORTED_FIBRE;
3593 	}
3594 
3595 	advertising = sky2->advertising;
3596 	cmd->base.autoneg = (sky2->flags & SKY2_FLAG_AUTO_SPEED)
3597 		? AUTONEG_ENABLE : AUTONEG_DISABLE;
3598 	cmd->base.duplex = sky2->duplex;
3599 
3600 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
3601 						supported);
3602 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
3603 						advertising);
3604 
3605 	return 0;
3606 }
3607 
3608 static int sky2_set_link_ksettings(struct net_device *dev,
3609 				   const struct ethtool_link_ksettings *cmd)
3610 {
3611 	struct sky2_port *sky2 = netdev_priv(dev);
3612 	const struct sky2_hw *hw = sky2->hw;
3613 	u32 supported = sky2_supported_modes(hw);
3614 	u32 new_advertising;
3615 
3616 	ethtool_convert_link_mode_to_legacy_u32(&new_advertising,
3617 						cmd->link_modes.advertising);
3618 
3619 	if (cmd->base.autoneg == AUTONEG_ENABLE) {
3620 		if (new_advertising & ~supported)
3621 			return -EINVAL;
3622 
3623 		if (sky2_is_copper(hw))
3624 			sky2->advertising = new_advertising |
3625 					    ADVERTISED_TP |
3626 					    ADVERTISED_Autoneg;
3627 		else
3628 			sky2->advertising = new_advertising |
3629 					    ADVERTISED_FIBRE |
3630 					    ADVERTISED_Autoneg;
3631 
3632 		sky2->flags |= SKY2_FLAG_AUTO_SPEED;
3633 		sky2->duplex = -1;
3634 		sky2->speed = -1;
3635 	} else {
3636 		u32 setting;
3637 		u32 speed = cmd->base.speed;
3638 
3639 		switch (speed) {
3640 		case SPEED_1000:
3641 			if (cmd->base.duplex == DUPLEX_FULL)
3642 				setting = SUPPORTED_1000baseT_Full;
3643 			else if (cmd->base.duplex == DUPLEX_HALF)
3644 				setting = SUPPORTED_1000baseT_Half;
3645 			else
3646 				return -EINVAL;
3647 			break;
3648 		case SPEED_100:
3649 			if (cmd->base.duplex == DUPLEX_FULL)
3650 				setting = SUPPORTED_100baseT_Full;
3651 			else if (cmd->base.duplex == DUPLEX_HALF)
3652 				setting = SUPPORTED_100baseT_Half;
3653 			else
3654 				return -EINVAL;
3655 			break;
3656 
3657 		case SPEED_10:
3658 			if (cmd->base.duplex == DUPLEX_FULL)
3659 				setting = SUPPORTED_10baseT_Full;
3660 			else if (cmd->base.duplex == DUPLEX_HALF)
3661 				setting = SUPPORTED_10baseT_Half;
3662 			else
3663 				return -EINVAL;
3664 			break;
3665 		default:
3666 			return -EINVAL;
3667 		}
3668 
3669 		if ((setting & supported) == 0)
3670 			return -EINVAL;
3671 
3672 		sky2->speed = speed;
3673 		sky2->duplex = cmd->base.duplex;
3674 		sky2->flags &= ~SKY2_FLAG_AUTO_SPEED;
3675 	}
3676 
3677 	if (netif_running(dev)) {
3678 		sky2_phy_reinit(sky2);
3679 		sky2_set_multicast(dev);
3680 	}
3681 
3682 	return 0;
3683 }
3684 
3685 static void sky2_get_drvinfo(struct net_device *dev,
3686 			     struct ethtool_drvinfo *info)
3687 {
3688 	struct sky2_port *sky2 = netdev_priv(dev);
3689 
3690 	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
3691 	strscpy(info->version, DRV_VERSION, sizeof(info->version));
3692 	strscpy(info->bus_info, pci_name(sky2->hw->pdev),
3693 		sizeof(info->bus_info));
3694 }
3695 
3696 static const struct sky2_stat {
3697 	char name[ETH_GSTRING_LEN];
3698 	u16 offset;
3699 } sky2_stats[] = {
3700 	{ "tx_bytes",	   GM_TXO_OK_HI },
3701 	{ "rx_bytes",	   GM_RXO_OK_HI },
3702 	{ "tx_broadcast",  GM_TXF_BC_OK },
3703 	{ "rx_broadcast",  GM_RXF_BC_OK },
3704 	{ "tx_multicast",  GM_TXF_MC_OK },
3705 	{ "rx_multicast",  GM_RXF_MC_OK },
3706 	{ "tx_unicast",    GM_TXF_UC_OK },
3707 	{ "rx_unicast",    GM_RXF_UC_OK },
3708 	{ "tx_mac_pause",  GM_TXF_MPAUSE },
3709 	{ "rx_mac_pause",  GM_RXF_MPAUSE },
3710 	{ "collisions",    GM_TXF_COL },
3711 	{ "late_collision",GM_TXF_LAT_COL },
3712 	{ "aborted", 	   GM_TXF_ABO_COL },
3713 	{ "single_collisions", GM_TXF_SNG_COL },
3714 	{ "multi_collisions", GM_TXF_MUL_COL },
3715 
3716 	{ "rx_short",      GM_RXF_SHT },
3717 	{ "rx_runt", 	   GM_RXE_FRAG },
3718 	{ "rx_64_byte_packets", GM_RXF_64B },
3719 	{ "rx_65_to_127_byte_packets", GM_RXF_127B },
3720 	{ "rx_128_to_255_byte_packets", GM_RXF_255B },
3721 	{ "rx_256_to_511_byte_packets", GM_RXF_511B },
3722 	{ "rx_512_to_1023_byte_packets", GM_RXF_1023B },
3723 	{ "rx_1024_to_1518_byte_packets", GM_RXF_1518B },
3724 	{ "rx_1518_to_max_byte_packets", GM_RXF_MAX_SZ },
3725 	{ "rx_too_long",   GM_RXF_LNG_ERR },
3726 	{ "rx_fifo_overflow", GM_RXE_FIFO_OV },
3727 	{ "rx_jabber",     GM_RXF_JAB_PKT },
3728 	{ "rx_fcs_error",   GM_RXF_FCS_ERR },
3729 
3730 	{ "tx_64_byte_packets", GM_TXF_64B },
3731 	{ "tx_65_to_127_byte_packets", GM_TXF_127B },
3732 	{ "tx_128_to_255_byte_packets", GM_TXF_255B },
3733 	{ "tx_256_to_511_byte_packets", GM_TXF_511B },
3734 	{ "tx_512_to_1023_byte_packets", GM_TXF_1023B },
3735 	{ "tx_1024_to_1518_byte_packets", GM_TXF_1518B },
3736 	{ "tx_1519_to_max_byte_packets", GM_TXF_MAX_SZ },
3737 	{ "tx_fifo_underrun", GM_TXE_FIFO_UR },
3738 };
3739 
3740 static u32 sky2_get_msglevel(struct net_device *netdev)
3741 {
3742 	struct sky2_port *sky2 = netdev_priv(netdev);
3743 	return sky2->msg_enable;
3744 }
3745 
3746 static int sky2_nway_reset(struct net_device *dev)
3747 {
3748 	struct sky2_port *sky2 = netdev_priv(dev);
3749 
3750 	if (!netif_running(dev) || !(sky2->flags & SKY2_FLAG_AUTO_SPEED))
3751 		return -EINVAL;
3752 
3753 	sky2_phy_reinit(sky2);
3754 	sky2_set_multicast(dev);
3755 
3756 	return 0;
3757 }
3758 
3759 static void sky2_phy_stats(struct sky2_port *sky2, u64 * data, unsigned count)
3760 {
3761 	struct sky2_hw *hw = sky2->hw;
3762 	unsigned port = sky2->port;
3763 	int i;
3764 
3765 	data[0] = get_stats64(hw, port, GM_TXO_OK_LO);
3766 	data[1] = get_stats64(hw, port, GM_RXO_OK_LO);
3767 
3768 	for (i = 2; i < count; i++)
3769 		data[i] = get_stats32(hw, port, sky2_stats[i].offset);
3770 }
3771 
3772 static void sky2_set_msglevel(struct net_device *netdev, u32 value)
3773 {
3774 	struct sky2_port *sky2 = netdev_priv(netdev);
3775 	sky2->msg_enable = value;
3776 }
3777 
3778 static int sky2_get_sset_count(struct net_device *dev, int sset)
3779 {
3780 	switch (sset) {
3781 	case ETH_SS_STATS:
3782 		return ARRAY_SIZE(sky2_stats);
3783 	default:
3784 		return -EOPNOTSUPP;
3785 	}
3786 }
3787 
3788 static void sky2_get_ethtool_stats(struct net_device *dev,
3789 				   struct ethtool_stats *stats, u64 * data)
3790 {
3791 	struct sky2_port *sky2 = netdev_priv(dev);
3792 
3793 	sky2_phy_stats(sky2, data, ARRAY_SIZE(sky2_stats));
3794 }
3795 
3796 static void sky2_get_strings(struct net_device *dev, u32 stringset, u8 * data)
3797 {
3798 	int i;
3799 
3800 	switch (stringset) {
3801 	case ETH_SS_STATS:
3802 		for (i = 0; i < ARRAY_SIZE(sky2_stats); i++)
3803 			memcpy(data + i * ETH_GSTRING_LEN,
3804 			       sky2_stats[i].name, ETH_GSTRING_LEN);
3805 		break;
3806 	}
3807 }
3808 
3809 static int sky2_set_mac_address(struct net_device *dev, void *p)
3810 {
3811 	struct sky2_port *sky2 = netdev_priv(dev);
3812 	struct sky2_hw *hw = sky2->hw;
3813 	unsigned port = sky2->port;
3814 	const struct sockaddr *addr = p;
3815 
3816 	if (!is_valid_ether_addr(addr->sa_data))
3817 		return -EADDRNOTAVAIL;
3818 
3819 	eth_hw_addr_set(dev, addr->sa_data);
3820 	memcpy_toio(hw->regs + B2_MAC_1 + port * 8,
3821 		    dev->dev_addr, ETH_ALEN);
3822 	memcpy_toio(hw->regs + B2_MAC_2 + port * 8,
3823 		    dev->dev_addr, ETH_ALEN);
3824 
3825 	/* virtual address for data */
3826 	gma_set_addr(hw, port, GM_SRC_ADDR_2L, dev->dev_addr);
3827 
3828 	/* physical address: used for pause frames */
3829 	gma_set_addr(hw, port, GM_SRC_ADDR_1L, dev->dev_addr);
3830 
3831 	return 0;
3832 }
3833 
3834 static inline void sky2_add_filter(u8 filter[8], const u8 *addr)
3835 {
3836 	u32 bit;
3837 
3838 	bit = ether_crc(ETH_ALEN, addr) & 63;
3839 	filter[bit >> 3] |= 1 << (bit & 7);
3840 }
3841 
3842 static void sky2_set_multicast(struct net_device *dev)
3843 {
3844 	struct sky2_port *sky2 = netdev_priv(dev);
3845 	struct sky2_hw *hw = sky2->hw;
3846 	unsigned port = sky2->port;
3847 	struct netdev_hw_addr *ha;
3848 	u16 reg;
3849 	u8 filter[8];
3850 	int rx_pause;
3851 	static const u8 pause_mc_addr[ETH_ALEN] = { 0x1, 0x80, 0xc2, 0x0, 0x0, 0x1 };
3852 
3853 	rx_pause = (sky2->flow_status == FC_RX || sky2->flow_status == FC_BOTH);
3854 	memset(filter, 0, sizeof(filter));
3855 
3856 	reg = gma_read16(hw, port, GM_RX_CTRL);
3857 	reg |= GM_RXCR_UCF_ENA;
3858 
3859 	if (dev->flags & IFF_PROMISC)	/* promiscuous */
3860 		reg &= ~(GM_RXCR_UCF_ENA | GM_RXCR_MCF_ENA);
3861 	else if (dev->flags & IFF_ALLMULTI)
3862 		memset(filter, 0xff, sizeof(filter));
3863 	else if (netdev_mc_empty(dev) && !rx_pause)
3864 		reg &= ~GM_RXCR_MCF_ENA;
3865 	else {
3866 		reg |= GM_RXCR_MCF_ENA;
3867 
3868 		if (rx_pause)
3869 			sky2_add_filter(filter, pause_mc_addr);
3870 
3871 		netdev_for_each_mc_addr(ha, dev)
3872 			sky2_add_filter(filter, ha->addr);
3873 	}
3874 
3875 	gma_write16(hw, port, GM_MC_ADDR_H1,
3876 		    (u16) filter[0] | ((u16) filter[1] << 8));
3877 	gma_write16(hw, port, GM_MC_ADDR_H2,
3878 		    (u16) filter[2] | ((u16) filter[3] << 8));
3879 	gma_write16(hw, port, GM_MC_ADDR_H3,
3880 		    (u16) filter[4] | ((u16) filter[5] << 8));
3881 	gma_write16(hw, port, GM_MC_ADDR_H4,
3882 		    (u16) filter[6] | ((u16) filter[7] << 8));
3883 
3884 	gma_write16(hw, port, GM_RX_CTRL, reg);
3885 }
3886 
3887 static void sky2_get_stats(struct net_device *dev,
3888 			   struct rtnl_link_stats64 *stats)
3889 {
3890 	struct sky2_port *sky2 = netdev_priv(dev);
3891 	struct sky2_hw *hw = sky2->hw;
3892 	unsigned port = sky2->port;
3893 	unsigned int start;
3894 	u64 _bytes, _packets;
3895 
3896 	do {
3897 		start = u64_stats_fetch_begin(&sky2->rx_stats.syncp);
3898 		_bytes = sky2->rx_stats.bytes;
3899 		_packets = sky2->rx_stats.packets;
3900 	} while (u64_stats_fetch_retry(&sky2->rx_stats.syncp, start));
3901 
3902 	stats->rx_packets = _packets;
3903 	stats->rx_bytes = _bytes;
3904 
3905 	do {
3906 		start = u64_stats_fetch_begin(&sky2->tx_stats.syncp);
3907 		_bytes = sky2->tx_stats.bytes;
3908 		_packets = sky2->tx_stats.packets;
3909 	} while (u64_stats_fetch_retry(&sky2->tx_stats.syncp, start));
3910 
3911 	stats->tx_packets = _packets;
3912 	stats->tx_bytes = _bytes;
3913 
3914 	stats->multicast = get_stats32(hw, port, GM_RXF_MC_OK)
3915 		+ get_stats32(hw, port, GM_RXF_BC_OK);
3916 
3917 	stats->collisions = get_stats32(hw, port, GM_TXF_COL);
3918 
3919 	stats->rx_length_errors = get_stats32(hw, port, GM_RXF_LNG_ERR);
3920 	stats->rx_crc_errors = get_stats32(hw, port, GM_RXF_FCS_ERR);
3921 	stats->rx_frame_errors = get_stats32(hw, port, GM_RXF_SHT)
3922 		+ get_stats32(hw, port, GM_RXE_FRAG);
3923 	stats->rx_over_errors = get_stats32(hw, port, GM_RXE_FIFO_OV);
3924 
3925 	stats->rx_dropped = dev->stats.rx_dropped;
3926 	stats->rx_fifo_errors = dev->stats.rx_fifo_errors;
3927 	stats->tx_fifo_errors = dev->stats.tx_fifo_errors;
3928 }
3929 
3930 /* Can have one global because blinking is controlled by
3931  * ethtool and that is always under RTNL mutex
3932  */
3933 static void sky2_led(struct sky2_port *sky2, enum led_mode mode)
3934 {
3935 	struct sky2_hw *hw = sky2->hw;
3936 	unsigned port = sky2->port;
3937 
3938 	spin_lock_bh(&sky2->phy_lock);
3939 	if (hw->chip_id == CHIP_ID_YUKON_EC_U ||
3940 	    hw->chip_id == CHIP_ID_YUKON_EX ||
3941 	    hw->chip_id == CHIP_ID_YUKON_SUPR) {
3942 		u16 pg;
3943 		pg = gm_phy_read(hw, port, PHY_MARV_EXT_ADR);
3944 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 3);
3945 
3946 		switch (mode) {
3947 		case MO_LED_OFF:
3948 			gm_phy_write(hw, port, PHY_MARV_PHY_CTRL,
3949 				     PHY_M_LEDC_LOS_CTRL(8) |
3950 				     PHY_M_LEDC_INIT_CTRL(8) |
3951 				     PHY_M_LEDC_STA1_CTRL(8) |
3952 				     PHY_M_LEDC_STA0_CTRL(8));
3953 			break;
3954 		case MO_LED_ON:
3955 			gm_phy_write(hw, port, PHY_MARV_PHY_CTRL,
3956 				     PHY_M_LEDC_LOS_CTRL(9) |
3957 				     PHY_M_LEDC_INIT_CTRL(9) |
3958 				     PHY_M_LEDC_STA1_CTRL(9) |
3959 				     PHY_M_LEDC_STA0_CTRL(9));
3960 			break;
3961 		case MO_LED_BLINK:
3962 			gm_phy_write(hw, port, PHY_MARV_PHY_CTRL,
3963 				     PHY_M_LEDC_LOS_CTRL(0xa) |
3964 				     PHY_M_LEDC_INIT_CTRL(0xa) |
3965 				     PHY_M_LEDC_STA1_CTRL(0xa) |
3966 				     PHY_M_LEDC_STA0_CTRL(0xa));
3967 			break;
3968 		case MO_LED_NORM:
3969 			gm_phy_write(hw, port, PHY_MARV_PHY_CTRL,
3970 				     PHY_M_LEDC_LOS_CTRL(1) |
3971 				     PHY_M_LEDC_INIT_CTRL(8) |
3972 				     PHY_M_LEDC_STA1_CTRL(7) |
3973 				     PHY_M_LEDC_STA0_CTRL(7));
3974 		}
3975 
3976 		gm_phy_write(hw, port, PHY_MARV_EXT_ADR, pg);
3977 	} else
3978 		gm_phy_write(hw, port, PHY_MARV_LED_OVER,
3979 				     PHY_M_LED_MO_DUP(mode) |
3980 				     PHY_M_LED_MO_10(mode) |
3981 				     PHY_M_LED_MO_100(mode) |
3982 				     PHY_M_LED_MO_1000(mode) |
3983 				     PHY_M_LED_MO_RX(mode) |
3984 				     PHY_M_LED_MO_TX(mode));
3985 
3986 	spin_unlock_bh(&sky2->phy_lock);
3987 }
3988 
3989 /* blink LED's for finding board */
3990 static int sky2_set_phys_id(struct net_device *dev,
3991 			    enum ethtool_phys_id_state state)
3992 {
3993 	struct sky2_port *sky2 = netdev_priv(dev);
3994 
3995 	switch (state) {
3996 	case ETHTOOL_ID_ACTIVE:
3997 		return 1;	/* cycle on/off once per second */
3998 	case ETHTOOL_ID_INACTIVE:
3999 		sky2_led(sky2, MO_LED_NORM);
4000 		break;
4001 	case ETHTOOL_ID_ON:
4002 		sky2_led(sky2, MO_LED_ON);
4003 		break;
4004 	case ETHTOOL_ID_OFF:
4005 		sky2_led(sky2, MO_LED_OFF);
4006 		break;
4007 	}
4008 
4009 	return 0;
4010 }
4011 
4012 static void sky2_get_pauseparam(struct net_device *dev,
4013 				struct ethtool_pauseparam *ecmd)
4014 {
4015 	struct sky2_port *sky2 = netdev_priv(dev);
4016 
4017 	switch (sky2->flow_mode) {
4018 	case FC_NONE:
4019 		ecmd->tx_pause = ecmd->rx_pause = 0;
4020 		break;
4021 	case FC_TX:
4022 		ecmd->tx_pause = 1, ecmd->rx_pause = 0;
4023 		break;
4024 	case FC_RX:
4025 		ecmd->tx_pause = 0, ecmd->rx_pause = 1;
4026 		break;
4027 	case FC_BOTH:
4028 		ecmd->tx_pause = ecmd->rx_pause = 1;
4029 	}
4030 
4031 	ecmd->autoneg = (sky2->flags & SKY2_FLAG_AUTO_PAUSE)
4032 		? AUTONEG_ENABLE : AUTONEG_DISABLE;
4033 }
4034 
4035 static int sky2_set_pauseparam(struct net_device *dev,
4036 			       struct ethtool_pauseparam *ecmd)
4037 {
4038 	struct sky2_port *sky2 = netdev_priv(dev);
4039 
4040 	if (ecmd->autoneg == AUTONEG_ENABLE)
4041 		sky2->flags |= SKY2_FLAG_AUTO_PAUSE;
4042 	else
4043 		sky2->flags &= ~SKY2_FLAG_AUTO_PAUSE;
4044 
4045 	sky2->flow_mode = sky2_flow(ecmd->rx_pause, ecmd->tx_pause);
4046 
4047 	if (netif_running(dev))
4048 		sky2_phy_reinit(sky2);
4049 
4050 	return 0;
4051 }
4052 
4053 static int sky2_get_coalesce(struct net_device *dev,
4054 			     struct ethtool_coalesce *ecmd,
4055 			     struct kernel_ethtool_coalesce *kernel_coal,
4056 			     struct netlink_ext_ack *extack)
4057 {
4058 	struct sky2_port *sky2 = netdev_priv(dev);
4059 	struct sky2_hw *hw = sky2->hw;
4060 
4061 	if (sky2_read8(hw, STAT_TX_TIMER_CTRL) == TIM_STOP)
4062 		ecmd->tx_coalesce_usecs = 0;
4063 	else {
4064 		u32 clks = sky2_read32(hw, STAT_TX_TIMER_INI);
4065 		ecmd->tx_coalesce_usecs = sky2_clk2us(hw, clks);
4066 	}
4067 	ecmd->tx_max_coalesced_frames = sky2_read16(hw, STAT_TX_IDX_TH);
4068 
4069 	if (sky2_read8(hw, STAT_LEV_TIMER_CTRL) == TIM_STOP)
4070 		ecmd->rx_coalesce_usecs = 0;
4071 	else {
4072 		u32 clks = sky2_read32(hw, STAT_LEV_TIMER_INI);
4073 		ecmd->rx_coalesce_usecs = sky2_clk2us(hw, clks);
4074 	}
4075 	ecmd->rx_max_coalesced_frames = sky2_read8(hw, STAT_FIFO_WM);
4076 
4077 	if (sky2_read8(hw, STAT_ISR_TIMER_CTRL) == TIM_STOP)
4078 		ecmd->rx_coalesce_usecs_irq = 0;
4079 	else {
4080 		u32 clks = sky2_read32(hw, STAT_ISR_TIMER_INI);
4081 		ecmd->rx_coalesce_usecs_irq = sky2_clk2us(hw, clks);
4082 	}
4083 
4084 	ecmd->rx_max_coalesced_frames_irq = sky2_read8(hw, STAT_FIFO_ISR_WM);
4085 
4086 	return 0;
4087 }
4088 
4089 /* Note: this affect both ports */
4090 static int sky2_set_coalesce(struct net_device *dev,
4091 			     struct ethtool_coalesce *ecmd,
4092 			     struct kernel_ethtool_coalesce *kernel_coal,
4093 			     struct netlink_ext_ack *extack)
4094 {
4095 	struct sky2_port *sky2 = netdev_priv(dev);
4096 	struct sky2_hw *hw = sky2->hw;
4097 	const u32 tmax = sky2_clk2us(hw, 0x0ffffff);
4098 
4099 	if (ecmd->tx_coalesce_usecs > tmax ||
4100 	    ecmd->rx_coalesce_usecs > tmax ||
4101 	    ecmd->rx_coalesce_usecs_irq > tmax)
4102 		return -EINVAL;
4103 
4104 	if (ecmd->tx_max_coalesced_frames >= sky2->tx_ring_size-1)
4105 		return -EINVAL;
4106 	if (ecmd->rx_max_coalesced_frames > RX_MAX_PENDING)
4107 		return -EINVAL;
4108 	if (ecmd->rx_max_coalesced_frames_irq > RX_MAX_PENDING)
4109 		return -EINVAL;
4110 
4111 	if (ecmd->tx_coalesce_usecs == 0)
4112 		sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP);
4113 	else {
4114 		sky2_write32(hw, STAT_TX_TIMER_INI,
4115 			     sky2_us2clk(hw, ecmd->tx_coalesce_usecs));
4116 		sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START);
4117 	}
4118 	sky2_write16(hw, STAT_TX_IDX_TH, ecmd->tx_max_coalesced_frames);
4119 
4120 	if (ecmd->rx_coalesce_usecs == 0)
4121 		sky2_write8(hw, STAT_LEV_TIMER_CTRL, TIM_STOP);
4122 	else {
4123 		sky2_write32(hw, STAT_LEV_TIMER_INI,
4124 			     sky2_us2clk(hw, ecmd->rx_coalesce_usecs));
4125 		sky2_write8(hw, STAT_LEV_TIMER_CTRL, TIM_START);
4126 	}
4127 	sky2_write8(hw, STAT_FIFO_WM, ecmd->rx_max_coalesced_frames);
4128 
4129 	if (ecmd->rx_coalesce_usecs_irq == 0)
4130 		sky2_write8(hw, STAT_ISR_TIMER_CTRL, TIM_STOP);
4131 	else {
4132 		sky2_write32(hw, STAT_ISR_TIMER_INI,
4133 			     sky2_us2clk(hw, ecmd->rx_coalesce_usecs_irq));
4134 		sky2_write8(hw, STAT_ISR_TIMER_CTRL, TIM_START);
4135 	}
4136 	sky2_write8(hw, STAT_FIFO_ISR_WM, ecmd->rx_max_coalesced_frames_irq);
4137 	return 0;
4138 }
4139 
4140 /*
4141  * Hardware is limited to min of 128 and max of 2048 for ring size
4142  * and  rounded up to next power of two
4143  * to avoid division in modulus calculation
4144  */
4145 static unsigned long roundup_ring_size(unsigned long pending)
4146 {
4147 	return max(128ul, roundup_pow_of_two(pending+1));
4148 }
4149 
4150 static void sky2_get_ringparam(struct net_device *dev,
4151 			       struct ethtool_ringparam *ering,
4152 			       struct kernel_ethtool_ringparam *kernel_ering,
4153 			       struct netlink_ext_ack *extack)
4154 {
4155 	struct sky2_port *sky2 = netdev_priv(dev);
4156 
4157 	ering->rx_max_pending = RX_MAX_PENDING;
4158 	ering->tx_max_pending = TX_MAX_PENDING;
4159 
4160 	ering->rx_pending = sky2->rx_pending;
4161 	ering->tx_pending = sky2->tx_pending;
4162 }
4163 
4164 static int sky2_set_ringparam(struct net_device *dev,
4165 			      struct ethtool_ringparam *ering,
4166 			      struct kernel_ethtool_ringparam *kernel_ering,
4167 			      struct netlink_ext_ack *extack)
4168 {
4169 	struct sky2_port *sky2 = netdev_priv(dev);
4170 
4171 	if (ering->rx_pending > RX_MAX_PENDING ||
4172 	    ering->rx_pending < 8 ||
4173 	    ering->tx_pending < TX_MIN_PENDING ||
4174 	    ering->tx_pending > TX_MAX_PENDING)
4175 		return -EINVAL;
4176 
4177 	sky2_detach(dev);
4178 
4179 	sky2->rx_pending = ering->rx_pending;
4180 	sky2->tx_pending = ering->tx_pending;
4181 	sky2->tx_ring_size = roundup_ring_size(sky2->tx_pending);
4182 
4183 	return sky2_reattach(dev);
4184 }
4185 
4186 static int sky2_get_regs_len(struct net_device *dev)
4187 {
4188 	return 0x4000;
4189 }
4190 
4191 static int sky2_reg_access_ok(struct sky2_hw *hw, unsigned int b)
4192 {
4193 	/* This complicated switch statement is to make sure and
4194 	 * only access regions that are unreserved.
4195 	 * Some blocks are only valid on dual port cards.
4196 	 */
4197 	switch (b) {
4198 	/* second port */
4199 	case 5:		/* Tx Arbiter 2 */
4200 	case 9:		/* RX2 */
4201 	case 14 ... 15:	/* TX2 */
4202 	case 17: case 19: /* Ram Buffer 2 */
4203 	case 22 ... 23: /* Tx Ram Buffer 2 */
4204 	case 25:	/* Rx MAC Fifo 1 */
4205 	case 27:	/* Tx MAC Fifo 2 */
4206 	case 31:	/* GPHY 2 */
4207 	case 40 ... 47: /* Pattern Ram 2 */
4208 	case 52: case 54: /* TCP Segmentation 2 */
4209 	case 112 ... 116: /* GMAC 2 */
4210 		return hw->ports > 1;
4211 
4212 	case 0:		/* Control */
4213 	case 2:		/* Mac address */
4214 	case 4:		/* Tx Arbiter 1 */
4215 	case 7:		/* PCI express reg */
4216 	case 8:		/* RX1 */
4217 	case 12 ... 13: /* TX1 */
4218 	case 16: case 18:/* Rx Ram Buffer 1 */
4219 	case 20 ... 21: /* Tx Ram Buffer 1 */
4220 	case 24:	/* Rx MAC Fifo 1 */
4221 	case 26:	/* Tx MAC Fifo 1 */
4222 	case 28 ... 29: /* Descriptor and status unit */
4223 	case 30:	/* GPHY 1*/
4224 	case 32 ... 39: /* Pattern Ram 1 */
4225 	case 48: case 50: /* TCP Segmentation 1 */
4226 	case 56 ... 60:	/* PCI space */
4227 	case 80 ... 84:	/* GMAC 1 */
4228 		return 1;
4229 
4230 	default:
4231 		return 0;
4232 	}
4233 }
4234 
4235 /*
4236  * Returns copy of control register region
4237  * Note: ethtool_get_regs always provides full size (16k) buffer
4238  */
4239 static void sky2_get_regs(struct net_device *dev, struct ethtool_regs *regs,
4240 			  void *p)
4241 {
4242 	const struct sky2_port *sky2 = netdev_priv(dev);
4243 	const void __iomem *io = sky2->hw->regs;
4244 	unsigned int b;
4245 
4246 	regs->version = 1;
4247 
4248 	for (b = 0; b < 128; b++) {
4249 		/* skip poisonous diagnostic ram region in block 3 */
4250 		if (b == 3)
4251 			memcpy_fromio(p + 0x10, io + 0x10, 128 - 0x10);
4252 		else if (sky2_reg_access_ok(sky2->hw, b))
4253 			memcpy_fromio(p, io, 128);
4254 		else
4255 			memset(p, 0, 128);
4256 
4257 		p += 128;
4258 		io += 128;
4259 	}
4260 }
4261 
4262 static int sky2_get_eeprom_len(struct net_device *dev)
4263 {
4264 	struct sky2_port *sky2 = netdev_priv(dev);
4265 	struct sky2_hw *hw = sky2->hw;
4266 	u16 reg2;
4267 
4268 	reg2 = sky2_pci_read16(hw, PCI_DEV_REG2);
4269 	return 1 << ( ((reg2 & PCI_VPD_ROM_SZ) >> 14) + 8);
4270 }
4271 
4272 static int sky2_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
4273 			   u8 *data)
4274 {
4275 	struct sky2_port *sky2 = netdev_priv(dev);
4276 	int rc;
4277 
4278 	eeprom->magic = SKY2_EEPROM_MAGIC;
4279 	rc = pci_read_vpd_any(sky2->hw->pdev, eeprom->offset, eeprom->len,
4280 			      data);
4281 	if (rc < 0)
4282 		return rc;
4283 
4284 	eeprom->len = rc;
4285 
4286 	return 0;
4287 }
4288 
4289 static int sky2_set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
4290 			   u8 *data)
4291 {
4292 	struct sky2_port *sky2 = netdev_priv(dev);
4293 	int rc;
4294 
4295 	if (eeprom->magic != SKY2_EEPROM_MAGIC)
4296 		return -EINVAL;
4297 
4298 	rc = pci_write_vpd_any(sky2->hw->pdev, eeprom->offset, eeprom->len,
4299 			       data);
4300 
4301 	return rc < 0 ? rc : 0;
4302 }
4303 
4304 static netdev_features_t sky2_fix_features(struct net_device *dev,
4305 	netdev_features_t features)
4306 {
4307 	const struct sky2_port *sky2 = netdev_priv(dev);
4308 	const struct sky2_hw *hw = sky2->hw;
4309 
4310 	/* In order to do Jumbo packets on these chips, need to turn off the
4311 	 * transmit store/forward. Therefore checksum offload won't work.
4312 	 */
4313 	if (dev->mtu > ETH_DATA_LEN && hw->chip_id == CHIP_ID_YUKON_EC_U) {
4314 		netdev_info(dev, "checksum offload not possible with jumbo frames\n");
4315 		features &= ~(NETIF_F_TSO | NETIF_F_SG | NETIF_F_CSUM_MASK);
4316 	}
4317 
4318 	/* Some hardware requires receive checksum for RSS to work. */
4319 	if ( (features & NETIF_F_RXHASH) &&
4320 	     !(features & NETIF_F_RXCSUM) &&
4321 	     (sky2->hw->flags & SKY2_HW_RSS_CHKSUM)) {
4322 		netdev_info(dev, "receive hashing forces receive checksum\n");
4323 		features |= NETIF_F_RXCSUM;
4324 	}
4325 
4326 	return features;
4327 }
4328 
4329 static int sky2_set_features(struct net_device *dev, netdev_features_t features)
4330 {
4331 	struct sky2_port *sky2 = netdev_priv(dev);
4332 	netdev_features_t changed = dev->features ^ features;
4333 
4334 	if ((changed & NETIF_F_RXCSUM) &&
4335 	    !(sky2->hw->flags & SKY2_HW_NEW_LE)) {
4336 		sky2_write32(sky2->hw,
4337 			     Q_ADDR(rxqaddr[sky2->port], Q_CSR),
4338 			     (features & NETIF_F_RXCSUM)
4339 			     ? BMU_ENA_RX_CHKSUM : BMU_DIS_RX_CHKSUM);
4340 	}
4341 
4342 	if (changed & NETIF_F_RXHASH)
4343 		rx_set_rss(dev, features);
4344 
4345 	if (changed & (NETIF_F_HW_VLAN_CTAG_TX|NETIF_F_HW_VLAN_CTAG_RX))
4346 		sky2_vlan_mode(dev, features);
4347 
4348 	return 0;
4349 }
4350 
4351 static const struct ethtool_ops sky2_ethtool_ops = {
4352 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
4353 				     ETHTOOL_COALESCE_MAX_FRAMES |
4354 				     ETHTOOL_COALESCE_RX_USECS_IRQ |
4355 				     ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ,
4356 	.get_drvinfo	= sky2_get_drvinfo,
4357 	.get_wol	= sky2_get_wol,
4358 	.set_wol	= sky2_set_wol,
4359 	.get_msglevel	= sky2_get_msglevel,
4360 	.set_msglevel	= sky2_set_msglevel,
4361 	.nway_reset	= sky2_nway_reset,
4362 	.get_regs_len	= sky2_get_regs_len,
4363 	.get_regs	= sky2_get_regs,
4364 	.get_link	= ethtool_op_get_link,
4365 	.get_eeprom_len	= sky2_get_eeprom_len,
4366 	.get_eeprom	= sky2_get_eeprom,
4367 	.set_eeprom	= sky2_set_eeprom,
4368 	.get_strings	= sky2_get_strings,
4369 	.get_coalesce	= sky2_get_coalesce,
4370 	.set_coalesce	= sky2_set_coalesce,
4371 	.get_ringparam	= sky2_get_ringparam,
4372 	.set_ringparam	= sky2_set_ringparam,
4373 	.get_pauseparam = sky2_get_pauseparam,
4374 	.set_pauseparam = sky2_set_pauseparam,
4375 	.set_phys_id	= sky2_set_phys_id,
4376 	.get_sset_count = sky2_get_sset_count,
4377 	.get_ethtool_stats = sky2_get_ethtool_stats,
4378 	.get_link_ksettings = sky2_get_link_ksettings,
4379 	.set_link_ksettings = sky2_set_link_ksettings,
4380 };
4381 
4382 #ifdef CONFIG_SKY2_DEBUG
4383 
4384 static struct dentry *sky2_debug;
4385 
4386 static int sky2_debug_show(struct seq_file *seq, void *v)
4387 {
4388 	struct net_device *dev = seq->private;
4389 	const struct sky2_port *sky2 = netdev_priv(dev);
4390 	struct sky2_hw *hw = sky2->hw;
4391 	unsigned port = sky2->port;
4392 	unsigned idx, last;
4393 	int sop;
4394 
4395 	seq_printf(seq, "IRQ src=%x mask=%x control=%x\n",
4396 		   sky2_read32(hw, B0_ISRC),
4397 		   sky2_read32(hw, B0_IMSK),
4398 		   sky2_read32(hw, B0_Y2_SP_ICR));
4399 
4400 	if (!netif_running(dev)) {
4401 		seq_puts(seq, "network not running\n");
4402 		return 0;
4403 	}
4404 
4405 	napi_disable(&hw->napi);
4406 	last = sky2_read16(hw, STAT_PUT_IDX);
4407 
4408 	seq_printf(seq, "Status ring %u\n", hw->st_size);
4409 	if (hw->st_idx == last)
4410 		seq_puts(seq, "Status ring (empty)\n");
4411 	else {
4412 		seq_puts(seq, "Status ring\n");
4413 		for (idx = hw->st_idx; idx != last && idx < hw->st_size;
4414 		     idx = RING_NEXT(idx, hw->st_size)) {
4415 			const struct sky2_status_le *le = hw->st_le + idx;
4416 			seq_printf(seq, "[%d] %#x %d %#x\n",
4417 				   idx, le->opcode, le->length, le->status);
4418 		}
4419 		seq_puts(seq, "\n");
4420 	}
4421 
4422 	seq_printf(seq, "Tx ring pending=%u...%u report=%d done=%d\n",
4423 		   sky2->tx_cons, sky2->tx_prod,
4424 		   sky2_read16(hw, port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX),
4425 		   sky2_read16(hw, Q_ADDR(txqaddr[port], Q_DONE)));
4426 
4427 	/* Dump contents of tx ring */
4428 	sop = 1;
4429 	for (idx = sky2->tx_next; idx != sky2->tx_prod && idx < sky2->tx_ring_size;
4430 	     idx = RING_NEXT(idx, sky2->tx_ring_size)) {
4431 		const struct sky2_tx_le *le = sky2->tx_le + idx;
4432 		u32 a = le32_to_cpu(le->addr);
4433 
4434 		if (sop)
4435 			seq_printf(seq, "%u:", idx);
4436 		sop = 0;
4437 
4438 		switch (le->opcode & ~HW_OWNER) {
4439 		case OP_ADDR64:
4440 			seq_printf(seq, " %#x:", a);
4441 			break;
4442 		case OP_LRGLEN:
4443 			seq_printf(seq, " mtu=%d", a);
4444 			break;
4445 		case OP_VLAN:
4446 			seq_printf(seq, " vlan=%d", be16_to_cpu(le->length));
4447 			break;
4448 		case OP_TCPLISW:
4449 			seq_printf(seq, " csum=%#x", a);
4450 			break;
4451 		case OP_LARGESEND:
4452 			seq_printf(seq, " tso=%#x(%d)", a, le16_to_cpu(le->length));
4453 			break;
4454 		case OP_PACKET:
4455 			seq_printf(seq, " %#x(%d)", a, le16_to_cpu(le->length));
4456 			break;
4457 		case OP_BUFFER:
4458 			seq_printf(seq, " frag=%#x(%d)", a, le16_to_cpu(le->length));
4459 			break;
4460 		default:
4461 			seq_printf(seq, " op=%#x,%#x(%d)", le->opcode,
4462 				   a, le16_to_cpu(le->length));
4463 		}
4464 
4465 		if (le->ctrl & EOP) {
4466 			seq_putc(seq, '\n');
4467 			sop = 1;
4468 		}
4469 	}
4470 
4471 	seq_printf(seq, "\nRx ring hw get=%d put=%d last=%d\n",
4472 		   sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_GET_IDX)),
4473 		   sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_PUT_IDX)),
4474 		   sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_LAST_IDX)));
4475 
4476 	sky2_read32(hw, B0_Y2_SP_LISR);
4477 	napi_enable(&hw->napi);
4478 	return 0;
4479 }
4480 DEFINE_SHOW_ATTRIBUTE(sky2_debug);
4481 
4482 /*
4483  * Use network device events to create/remove/rename
4484  * debugfs file entries
4485  */
4486 static int sky2_device_event(struct notifier_block *unused,
4487 			     unsigned long event, void *ptr)
4488 {
4489 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4490 	struct sky2_port *sky2 = netdev_priv(dev);
4491 
4492 	if (dev->netdev_ops->ndo_open != sky2_open || !sky2_debug)
4493 		return NOTIFY_DONE;
4494 
4495 	switch (event) {
4496 	case NETDEV_CHANGENAME:
4497 		if (sky2->debugfs) {
4498 			sky2->debugfs = debugfs_rename(sky2_debug, sky2->debugfs,
4499 						       sky2_debug, dev->name);
4500 		}
4501 		break;
4502 
4503 	case NETDEV_GOING_DOWN:
4504 		if (sky2->debugfs) {
4505 			netdev_printk(KERN_DEBUG, dev, "remove debugfs\n");
4506 			debugfs_remove(sky2->debugfs);
4507 			sky2->debugfs = NULL;
4508 		}
4509 		break;
4510 
4511 	case NETDEV_UP:
4512 		sky2->debugfs = debugfs_create_file(dev->name, 0444,
4513 						    sky2_debug, dev,
4514 						    &sky2_debug_fops);
4515 		if (IS_ERR(sky2->debugfs))
4516 			sky2->debugfs = NULL;
4517 	}
4518 
4519 	return NOTIFY_DONE;
4520 }
4521 
4522 static struct notifier_block sky2_notifier = {
4523 	.notifier_call = sky2_device_event,
4524 };
4525 
4526 
4527 static __init void sky2_debug_init(void)
4528 {
4529 	struct dentry *ent;
4530 
4531 	ent = debugfs_create_dir("sky2", NULL);
4532 	if (!ent || IS_ERR(ent))
4533 		return;
4534 
4535 	sky2_debug = ent;
4536 	register_netdevice_notifier(&sky2_notifier);
4537 }
4538 
4539 static __exit void sky2_debug_cleanup(void)
4540 {
4541 	if (sky2_debug) {
4542 		unregister_netdevice_notifier(&sky2_notifier);
4543 		debugfs_remove(sky2_debug);
4544 		sky2_debug = NULL;
4545 	}
4546 }
4547 
4548 #else
4549 #define sky2_debug_init()
4550 #define sky2_debug_cleanup()
4551 #endif
4552 
4553 /* Two copies of network device operations to handle special case of
4554  * not allowing netpoll on second port
4555  */
4556 static const struct net_device_ops sky2_netdev_ops[2] = {
4557   {
4558 	.ndo_open		= sky2_open,
4559 	.ndo_stop		= sky2_close,
4560 	.ndo_start_xmit		= sky2_xmit_frame,
4561 	.ndo_eth_ioctl		= sky2_ioctl,
4562 	.ndo_validate_addr	= eth_validate_addr,
4563 	.ndo_set_mac_address	= sky2_set_mac_address,
4564 	.ndo_set_rx_mode	= sky2_set_multicast,
4565 	.ndo_change_mtu		= sky2_change_mtu,
4566 	.ndo_fix_features	= sky2_fix_features,
4567 	.ndo_set_features	= sky2_set_features,
4568 	.ndo_tx_timeout		= sky2_tx_timeout,
4569 	.ndo_get_stats64	= sky2_get_stats,
4570 #ifdef CONFIG_NET_POLL_CONTROLLER
4571 	.ndo_poll_controller	= sky2_netpoll,
4572 #endif
4573   },
4574   {
4575 	.ndo_open		= sky2_open,
4576 	.ndo_stop		= sky2_close,
4577 	.ndo_start_xmit		= sky2_xmit_frame,
4578 	.ndo_eth_ioctl		= sky2_ioctl,
4579 	.ndo_validate_addr	= eth_validate_addr,
4580 	.ndo_set_mac_address	= sky2_set_mac_address,
4581 	.ndo_set_rx_mode	= sky2_set_multicast,
4582 	.ndo_change_mtu		= sky2_change_mtu,
4583 	.ndo_fix_features	= sky2_fix_features,
4584 	.ndo_set_features	= sky2_set_features,
4585 	.ndo_tx_timeout		= sky2_tx_timeout,
4586 	.ndo_get_stats64	= sky2_get_stats,
4587   },
4588 };
4589 
4590 /* Initialize network device */
4591 static struct net_device *sky2_init_netdev(struct sky2_hw *hw, unsigned port,
4592 					   int highmem, int wol)
4593 {
4594 	struct sky2_port *sky2;
4595 	struct net_device *dev = alloc_etherdev(sizeof(*sky2));
4596 	int ret;
4597 
4598 	if (!dev)
4599 		return NULL;
4600 
4601 	SET_NETDEV_DEV(dev, &hw->pdev->dev);
4602 	dev->irq = hw->pdev->irq;
4603 	dev->ethtool_ops = &sky2_ethtool_ops;
4604 	dev->watchdog_timeo = TX_WATCHDOG;
4605 	dev->netdev_ops = &sky2_netdev_ops[port];
4606 
4607 	sky2 = netdev_priv(dev);
4608 	sky2->netdev = dev;
4609 	sky2->hw = hw;
4610 	sky2->msg_enable = netif_msg_init(debug, default_msg);
4611 
4612 	u64_stats_init(&sky2->tx_stats.syncp);
4613 	u64_stats_init(&sky2->rx_stats.syncp);
4614 
4615 	/* Auto speed and flow control */
4616 	sky2->flags = SKY2_FLAG_AUTO_SPEED | SKY2_FLAG_AUTO_PAUSE;
4617 	if (hw->chip_id != CHIP_ID_YUKON_XL)
4618 		dev->hw_features |= NETIF_F_RXCSUM;
4619 
4620 	sky2->flow_mode = FC_BOTH;
4621 
4622 	sky2->duplex = -1;
4623 	sky2->speed = -1;
4624 	sky2->advertising = sky2_supported_modes(hw);
4625 	sky2->wol = wol;
4626 
4627 	spin_lock_init(&sky2->phy_lock);
4628 
4629 	sky2->tx_pending = TX_DEF_PENDING;
4630 	sky2->tx_ring_size = roundup_ring_size(TX_DEF_PENDING);
4631 	sky2->rx_pending = RX_DEF_PENDING;
4632 
4633 	hw->dev[port] = dev;
4634 
4635 	sky2->port = port;
4636 
4637 	dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO;
4638 
4639 	if (highmem)
4640 		dev->features |= NETIF_F_HIGHDMA;
4641 
4642 	/* Enable receive hashing unless hardware is known broken */
4643 	if (!(hw->flags & SKY2_HW_RSS_BROKEN))
4644 		dev->hw_features |= NETIF_F_RXHASH;
4645 
4646 	if (!(hw->flags & SKY2_HW_VLAN_BROKEN)) {
4647 		dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX |
4648 				    NETIF_F_HW_VLAN_CTAG_RX;
4649 		dev->vlan_features |= SKY2_VLAN_OFFLOADS;
4650 	}
4651 
4652 	dev->features |= dev->hw_features;
4653 
4654 	/* MTU range: 60 - 1500 or 9000 */
4655 	dev->min_mtu = ETH_ZLEN;
4656 	if (hw->chip_id == CHIP_ID_YUKON_FE ||
4657 	    hw->chip_id == CHIP_ID_YUKON_FE_P)
4658 		dev->max_mtu = ETH_DATA_LEN;
4659 	else
4660 		dev->max_mtu = ETH_JUMBO_MTU;
4661 
4662 	/* try to get mac address in the following order:
4663 	 * 1) from device tree data
4664 	 * 2) from internal registers set by bootloader
4665 	 */
4666 	ret = of_get_ethdev_address(hw->pdev->dev.of_node, dev);
4667 	if (ret) {
4668 		u8 addr[ETH_ALEN];
4669 
4670 		memcpy_fromio(addr, hw->regs + B2_MAC_1 + port * 8, ETH_ALEN);
4671 		eth_hw_addr_set(dev, addr);
4672 	}
4673 
4674 	/* if the address is invalid, use a random value */
4675 	if (!is_valid_ether_addr(dev->dev_addr)) {
4676 		struct sockaddr sa = { AF_UNSPEC };
4677 
4678 		dev_warn(&hw->pdev->dev, "Invalid MAC address, defaulting to random\n");
4679 		eth_hw_addr_random(dev);
4680 		memcpy(sa.sa_data, dev->dev_addr, ETH_ALEN);
4681 		if (sky2_set_mac_address(dev, &sa))
4682 			dev_warn(&hw->pdev->dev, "Failed to set MAC address.\n");
4683 	}
4684 
4685 	return dev;
4686 }
4687 
4688 static void sky2_show_addr(struct net_device *dev)
4689 {
4690 	const struct sky2_port *sky2 = netdev_priv(dev);
4691 
4692 	netif_info(sky2, probe, dev, "addr %pM\n", dev->dev_addr);
4693 }
4694 
4695 /* Handle software interrupt used during MSI test */
4696 static irqreturn_t sky2_test_intr(int irq, void *dev_id)
4697 {
4698 	struct sky2_hw *hw = dev_id;
4699 	u32 status = sky2_read32(hw, B0_Y2_SP_ISRC2);
4700 
4701 	if (status == 0)
4702 		return IRQ_NONE;
4703 
4704 	if (status & Y2_IS_IRQ_SW) {
4705 		hw->flags |= SKY2_HW_USE_MSI;
4706 		wake_up(&hw->msi_wait);
4707 		sky2_write8(hw, B0_CTST, CS_CL_SW_IRQ);
4708 	}
4709 	sky2_write32(hw, B0_Y2_SP_ICR, 2);
4710 
4711 	return IRQ_HANDLED;
4712 }
4713 
4714 /* Test interrupt path by forcing a software IRQ */
4715 static int sky2_test_msi(struct sky2_hw *hw)
4716 {
4717 	struct pci_dev *pdev = hw->pdev;
4718 	int err;
4719 
4720 	init_waitqueue_head(&hw->msi_wait);
4721 
4722 	err = request_irq(pdev->irq, sky2_test_intr, 0, DRV_NAME, hw);
4723 	if (err) {
4724 		dev_err(&pdev->dev, "cannot assign irq %d\n", pdev->irq);
4725 		return err;
4726 	}
4727 
4728 	sky2_write32(hw, B0_IMSK, Y2_IS_IRQ_SW);
4729 
4730 	sky2_write8(hw, B0_CTST, CS_ST_SW_IRQ);
4731 	sky2_read8(hw, B0_CTST);
4732 
4733 	wait_event_timeout(hw->msi_wait, (hw->flags & SKY2_HW_USE_MSI), HZ/10);
4734 
4735 	if (!(hw->flags & SKY2_HW_USE_MSI)) {
4736 		/* MSI test failed, go back to INTx mode */
4737 		dev_info(&pdev->dev, "No interrupt generated using MSI, "
4738 			 "switching to INTx mode.\n");
4739 
4740 		err = -EOPNOTSUPP;
4741 		sky2_write8(hw, B0_CTST, CS_CL_SW_IRQ);
4742 	}
4743 
4744 	sky2_write32(hw, B0_IMSK, 0);
4745 	sky2_read32(hw, B0_IMSK);
4746 
4747 	free_irq(pdev->irq, hw);
4748 
4749 	return err;
4750 }
4751 
4752 /* This driver supports yukon2 chipset only */
4753 static const char *sky2_name(u8 chipid, char *buf, int sz)
4754 {
4755 	static const char *const name[] = {
4756 		"XL",		/* 0xb3 */
4757 		"EC Ultra", 	/* 0xb4 */
4758 		"Extreme",	/* 0xb5 */
4759 		"EC",		/* 0xb6 */
4760 		"FE",		/* 0xb7 */
4761 		"FE+",		/* 0xb8 */
4762 		"Supreme",	/* 0xb9 */
4763 		"UL 2",		/* 0xba */
4764 		"Unknown",	/* 0xbb */
4765 		"Optima",	/* 0xbc */
4766 		"OptimaEEE",    /* 0xbd */
4767 		"Optima 2",	/* 0xbe */
4768 	};
4769 
4770 	if (chipid >= CHIP_ID_YUKON_XL && chipid <= CHIP_ID_YUKON_OP_2)
4771 		snprintf(buf, sz, "%s", name[chipid - CHIP_ID_YUKON_XL]);
4772 	else
4773 		snprintf(buf, sz, "(chip %#x)", chipid);
4774 	return buf;
4775 }
4776 
4777 static const struct dmi_system_id msi_blacklist[] = {
4778 	{
4779 		.ident = "Dell Inspiron 1545",
4780 		.matches = {
4781 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
4782 			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1545"),
4783 		},
4784 	},
4785 	{
4786 		.ident = "Gateway P-79",
4787 		.matches = {
4788 			DMI_MATCH(DMI_SYS_VENDOR, "Gateway"),
4789 			DMI_MATCH(DMI_PRODUCT_NAME, "P-79"),
4790 		},
4791 	},
4792 	{
4793 		.ident = "ASUS P5W DH Deluxe",
4794 		.matches = {
4795 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTEK COMPUTER INC"),
4796 			DMI_MATCH(DMI_PRODUCT_NAME, "P5W DH Deluxe"),
4797 		},
4798 	},
4799 	{
4800 		.ident = "ASUS P6T",
4801 		.matches = {
4802 			DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
4803 			DMI_MATCH(DMI_BOARD_NAME, "P6T"),
4804 		},
4805 	},
4806 	{
4807 		.ident = "ASUS P6X",
4808 		.matches = {
4809 			DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
4810 			DMI_MATCH(DMI_BOARD_NAME, "P6X"),
4811 		},
4812 	},
4813 	{}
4814 };
4815 
4816 static int sky2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4817 {
4818 	struct net_device *dev, *dev1;
4819 	struct sky2_hw *hw;
4820 	int err, using_dac = 0, wol_default;
4821 	u32 reg;
4822 	char buf1[16];
4823 
4824 	err = pci_enable_device(pdev);
4825 	if (err) {
4826 		dev_err(&pdev->dev, "cannot enable PCI device\n");
4827 		goto err_out;
4828 	}
4829 
4830 	/* Get configuration information
4831 	 * Note: only regular PCI config access once to test for HW issues
4832 	 *       other PCI access through shared memory for speed and to
4833 	 *	 avoid MMCONFIG problems.
4834 	 */
4835 	err = pci_read_config_dword(pdev, PCI_DEV_REG2, &reg);
4836 	if (err) {
4837 		dev_err(&pdev->dev, "PCI read config failed\n");
4838 		goto err_out_disable;
4839 	}
4840 
4841 	if (~reg == 0) {
4842 		dev_err(&pdev->dev, "PCI configuration read error\n");
4843 		err = -EIO;
4844 		goto err_out_disable;
4845 	}
4846 
4847 	err = pci_request_regions(pdev, DRV_NAME);
4848 	if (err) {
4849 		dev_err(&pdev->dev, "cannot obtain PCI resources\n");
4850 		goto err_out_disable;
4851 	}
4852 
4853 	pci_set_master(pdev);
4854 
4855 	if (sizeof(dma_addr_t) > sizeof(u32) &&
4856 	    !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
4857 		using_dac = 1;
4858 		err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
4859 		if (err < 0) {
4860 			dev_err(&pdev->dev, "unable to obtain 64 bit DMA "
4861 				"for consistent allocations\n");
4862 			goto err_out_free_regions;
4863 		}
4864 	} else {
4865 		err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4866 		if (err) {
4867 			dev_err(&pdev->dev, "no usable DMA configuration\n");
4868 			goto err_out_free_regions;
4869 		}
4870 	}
4871 
4872 
4873 #ifdef __BIG_ENDIAN
4874 	/* The sk98lin vendor driver uses hardware byte swapping but
4875 	 * this driver uses software swapping.
4876 	 */
4877 	reg &= ~PCI_REV_DESC;
4878 	err = pci_write_config_dword(pdev, PCI_DEV_REG2, reg);
4879 	if (err) {
4880 		dev_err(&pdev->dev, "PCI write config failed\n");
4881 		goto err_out_free_regions;
4882 	}
4883 #endif
4884 
4885 	wol_default = device_may_wakeup(&pdev->dev) ? WAKE_MAGIC : 0;
4886 
4887 	err = -ENOMEM;
4888 
4889 	hw = kzalloc(sizeof(*hw) + strlen(DRV_NAME "@pci:")
4890 		     + strlen(pci_name(pdev)) + 1, GFP_KERNEL);
4891 	if (!hw)
4892 		goto err_out_free_regions;
4893 
4894 	hw->pdev = pdev;
4895 	sprintf(hw->irq_name, DRV_NAME "@pci:%s", pci_name(pdev));
4896 
4897 	hw->regs = ioremap(pci_resource_start(pdev, 0), 0x4000);
4898 	if (!hw->regs) {
4899 		dev_err(&pdev->dev, "cannot map device registers\n");
4900 		goto err_out_free_hw;
4901 	}
4902 
4903 	err = sky2_init(hw);
4904 	if (err)
4905 		goto err_out_iounmap;
4906 
4907 	/* ring for status responses */
4908 	hw->st_size = hw->ports * roundup_pow_of_two(3*RX_MAX_PENDING + TX_MAX_PENDING);
4909 	hw->st_le = dma_alloc_coherent(&pdev->dev,
4910 				       hw->st_size * sizeof(struct sky2_status_le),
4911 				       &hw->st_dma, GFP_KERNEL);
4912 	if (!hw->st_le) {
4913 		err = -ENOMEM;
4914 		goto err_out_reset;
4915 	}
4916 
4917 	dev_info(&pdev->dev, "Yukon-2 %s chip revision %d\n",
4918 		 sky2_name(hw->chip_id, buf1, sizeof(buf1)), hw->chip_rev);
4919 
4920 	sky2_reset(hw);
4921 
4922 	dev = sky2_init_netdev(hw, 0, using_dac, wol_default);
4923 	if (!dev) {
4924 		err = -ENOMEM;
4925 		goto err_out_free_pci;
4926 	}
4927 
4928 	if (disable_msi == -1)
4929 		disable_msi = !!dmi_check_system(msi_blacklist);
4930 
4931 	if (!disable_msi && pci_enable_msi(pdev) == 0) {
4932 		err = sky2_test_msi(hw);
4933 		if (err) {
4934 			pci_disable_msi(pdev);
4935 			if (err != -EOPNOTSUPP)
4936 				goto err_out_free_netdev;
4937 		}
4938 	}
4939 
4940 	netif_napi_add(dev, &hw->napi, sky2_poll);
4941 
4942 	err = register_netdev(dev);
4943 	if (err) {
4944 		dev_err(&pdev->dev, "cannot register net device\n");
4945 		goto err_out_free_netdev;
4946 	}
4947 
4948 	netif_carrier_off(dev);
4949 
4950 	sky2_show_addr(dev);
4951 
4952 	if (hw->ports > 1) {
4953 		dev1 = sky2_init_netdev(hw, 1, using_dac, wol_default);
4954 		if (!dev1) {
4955 			err = -ENOMEM;
4956 			goto err_out_unregister;
4957 		}
4958 
4959 		err = register_netdev(dev1);
4960 		if (err) {
4961 			dev_err(&pdev->dev, "cannot register second net device\n");
4962 			goto err_out_free_dev1;
4963 		}
4964 
4965 		err = sky2_setup_irq(hw, hw->irq_name);
4966 		if (err)
4967 			goto err_out_unregister_dev1;
4968 
4969 		sky2_show_addr(dev1);
4970 	}
4971 
4972 	timer_setup(&hw->watchdog_timer, sky2_watchdog, 0);
4973 	INIT_WORK(&hw->restart_work, sky2_restart);
4974 
4975 	pci_set_drvdata(pdev, hw);
4976 	pdev->d3hot_delay = 300;
4977 
4978 	return 0;
4979 
4980 err_out_unregister_dev1:
4981 	unregister_netdev(dev1);
4982 err_out_free_dev1:
4983 	free_netdev(dev1);
4984 err_out_unregister:
4985 	unregister_netdev(dev);
4986 err_out_free_netdev:
4987 	if (hw->flags & SKY2_HW_USE_MSI)
4988 		pci_disable_msi(pdev);
4989 	free_netdev(dev);
4990 err_out_free_pci:
4991 	dma_free_coherent(&pdev->dev,
4992 			  hw->st_size * sizeof(struct sky2_status_le),
4993 			  hw->st_le, hw->st_dma);
4994 err_out_reset:
4995 	sky2_write8(hw, B0_CTST, CS_RST_SET);
4996 err_out_iounmap:
4997 	iounmap(hw->regs);
4998 err_out_free_hw:
4999 	kfree(hw);
5000 err_out_free_regions:
5001 	pci_release_regions(pdev);
5002 err_out_disable:
5003 	pci_disable_device(pdev);
5004 err_out:
5005 	return err;
5006 }
5007 
5008 static void sky2_remove(struct pci_dev *pdev)
5009 {
5010 	struct sky2_hw *hw = pci_get_drvdata(pdev);
5011 	int i;
5012 
5013 	if (!hw)
5014 		return;
5015 
5016 	timer_shutdown_sync(&hw->watchdog_timer);
5017 	cancel_work_sync(&hw->restart_work);
5018 
5019 	for (i = hw->ports-1; i >= 0; --i)
5020 		unregister_netdev(hw->dev[i]);
5021 
5022 	sky2_write32(hw, B0_IMSK, 0);
5023 	sky2_read32(hw, B0_IMSK);
5024 
5025 	sky2_power_aux(hw);
5026 
5027 	sky2_write8(hw, B0_CTST, CS_RST_SET);
5028 	sky2_read8(hw, B0_CTST);
5029 
5030 	if (hw->ports > 1) {
5031 		napi_disable(&hw->napi);
5032 		free_irq(pdev->irq, hw);
5033 	}
5034 
5035 	if (hw->flags & SKY2_HW_USE_MSI)
5036 		pci_disable_msi(pdev);
5037 	dma_free_coherent(&pdev->dev,
5038 			  hw->st_size * sizeof(struct sky2_status_le),
5039 			  hw->st_le, hw->st_dma);
5040 	pci_release_regions(pdev);
5041 	pci_disable_device(pdev);
5042 
5043 	for (i = hw->ports-1; i >= 0; --i)
5044 		free_netdev(hw->dev[i]);
5045 
5046 	iounmap(hw->regs);
5047 	kfree(hw);
5048 }
5049 
5050 static int sky2_suspend(struct device *dev)
5051 {
5052 	struct sky2_hw *hw = dev_get_drvdata(dev);
5053 	int i;
5054 
5055 	if (!hw)
5056 		return 0;
5057 
5058 	del_timer_sync(&hw->watchdog_timer);
5059 	cancel_work_sync(&hw->restart_work);
5060 
5061 	rtnl_lock();
5062 
5063 	sky2_all_down(hw);
5064 	for (i = 0; i < hw->ports; i++) {
5065 		struct net_device *dev = hw->dev[i];
5066 		struct sky2_port *sky2 = netdev_priv(dev);
5067 
5068 		if (sky2->wol)
5069 			sky2_wol_init(sky2);
5070 	}
5071 
5072 	sky2_power_aux(hw);
5073 	rtnl_unlock();
5074 
5075 	return 0;
5076 }
5077 
5078 #ifdef CONFIG_PM_SLEEP
5079 static int sky2_resume(struct device *dev)
5080 {
5081 	struct pci_dev *pdev = to_pci_dev(dev);
5082 	struct sky2_hw *hw = pci_get_drvdata(pdev);
5083 	int err;
5084 
5085 	if (!hw)
5086 		return 0;
5087 
5088 	/* Re-enable all clocks */
5089 	err = pci_write_config_dword(pdev, PCI_DEV_REG3, 0);
5090 	if (err) {
5091 		dev_err(&pdev->dev, "PCI write config failed\n");
5092 		goto out;
5093 	}
5094 
5095 	rtnl_lock();
5096 	sky2_reset(hw);
5097 	sky2_all_up(hw);
5098 	rtnl_unlock();
5099 
5100 	return 0;
5101 out:
5102 
5103 	dev_err(&pdev->dev, "resume failed (%d)\n", err);
5104 	pci_disable_device(pdev);
5105 	return err;
5106 }
5107 
5108 static SIMPLE_DEV_PM_OPS(sky2_pm_ops, sky2_suspend, sky2_resume);
5109 #define SKY2_PM_OPS (&sky2_pm_ops)
5110 
5111 #else
5112 
5113 #define SKY2_PM_OPS NULL
5114 #endif
5115 
5116 static void sky2_shutdown(struct pci_dev *pdev)
5117 {
5118 	struct sky2_hw *hw = pci_get_drvdata(pdev);
5119 	int port;
5120 
5121 	for (port = 0; port < hw->ports; port++) {
5122 		struct net_device *ndev = hw->dev[port];
5123 
5124 		rtnl_lock();
5125 		if (netif_running(ndev)) {
5126 			dev_close(ndev);
5127 			netif_device_detach(ndev);
5128 		}
5129 		rtnl_unlock();
5130 	}
5131 	sky2_suspend(&pdev->dev);
5132 	pci_wake_from_d3(pdev, device_may_wakeup(&pdev->dev));
5133 	pci_set_power_state(pdev, PCI_D3hot);
5134 }
5135 
5136 static struct pci_driver sky2_driver = {
5137 	.name = DRV_NAME,
5138 	.id_table = sky2_id_table,
5139 	.probe = sky2_probe,
5140 	.remove = sky2_remove,
5141 	.shutdown = sky2_shutdown,
5142 	.driver.pm = SKY2_PM_OPS,
5143 };
5144 
5145 static int __init sky2_init_module(void)
5146 {
5147 	pr_info("driver version " DRV_VERSION "\n");
5148 
5149 	sky2_debug_init();
5150 	return pci_register_driver(&sky2_driver);
5151 }
5152 
5153 static void __exit sky2_cleanup_module(void)
5154 {
5155 	pci_unregister_driver(&sky2_driver);
5156 	sky2_debug_cleanup();
5157 }
5158 
5159 module_init(sky2_init_module);
5160 module_exit(sky2_cleanup_module);
5161 
5162 MODULE_DESCRIPTION("Marvell Yukon 2 Gigabit Ethernet driver");
5163 MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>");
5164 MODULE_LICENSE("GPL");
5165 MODULE_VERSION(DRV_VERSION);
5166