1 /*
2  * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
3  * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
4  * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
5  *
6  * Derived from Intel e1000 driver
7  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
8  *
9  * This program is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU General Public License as published by the Free
11  * Software Foundation; either version 2 of the License, or (at your option)
12  * any later version.
13  *
14  * This program is distributed in the hope that it will be useful, but WITHOUT
15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
17  * more details.
18  *
19  * You should have received a copy of the GNU General Public License along with
20  * this program; if not, write to the Free Software Foundation, Inc., 59
21  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
22  */
23 
24 #ifndef ATL1_H
25 #define ATL1_H
26 
27 #include <linux/compiler.h>
28 #include <linux/ethtool.h>
29 #include <linux/if_vlan.h>
30 #include <linux/mii.h>
31 #include <linux/module.h>
32 #include <linux/skbuff.h>
33 #include <linux/spinlock.h>
34 #include <linux/timer.h>
35 #include <linux/types.h>
36 #include <linux/workqueue.h>
37 
38 #include "atlx.h"
39 
40 #define ATLX_DRIVER_NAME "atl1"
41 
42 MODULE_DESCRIPTION("Atheros L1 Gigabit Ethernet Driver");
43 
44 #define atlx_adapter		atl1_adapter
45 #define atlx_check_for_link	atl1_check_for_link
46 #define atlx_check_link		atl1_check_link
47 #define atlx_hash_mc_addr	atl1_hash_mc_addr
48 #define atlx_hash_set		atl1_hash_set
49 #define atlx_hw			atl1_hw
50 #define atlx_mii_ioctl		atl1_mii_ioctl
51 #define atlx_read_phy_reg	atl1_read_phy_reg
52 #define atlx_set_mac		atl1_set_mac
53 #define atlx_set_mac_addr	atl1_set_mac_addr
54 
55 struct atl1_adapter;
56 struct atl1_hw;
57 
58 /* function prototypes needed by multiple files */
59 static u32 atl1_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr);
60 static void atl1_hash_set(struct atl1_hw *hw, u32 hash_value);
61 static void atl1_set_mac_addr(struct atl1_hw *hw);
62 static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
63 	int cmd);
64 static u32 atl1_check_link(struct atl1_adapter *adapter);
65 
66 /* hardware definitions specific to L1 */
67 
68 /* Block IDLE Status Register */
69 #define IDLE_STATUS_RXMAC			0x1
70 #define IDLE_STATUS_TXMAC			0x2
71 #define IDLE_STATUS_RXQ				0x4
72 #define IDLE_STATUS_TXQ				0x8
73 #define IDLE_STATUS_DMAR			0x10
74 #define IDLE_STATUS_DMAW			0x20
75 #define IDLE_STATUS_SMB				0x40
76 #define IDLE_STATUS_CMB				0x80
77 
78 /* MDIO Control Register */
79 #define MDIO_WAIT_TIMES				30
80 
81 /* MAC Control Register */
82 #define MAC_CTRL_TX_PAUSE			0x10000
83 #define MAC_CTRL_SCNT				0x20000
84 #define MAC_CTRL_SRST_TX			0x40000
85 #define MAC_CTRL_TX_SIMURST			0x80000
86 #define MAC_CTRL_SPEED_SHIFT			20
87 #define MAC_CTRL_SPEED_MASK			0x300000
88 #define MAC_CTRL_SPEED_1000			0x2
89 #define MAC_CTRL_SPEED_10_100			0x1
90 #define MAC_CTRL_DBG_TX_BKPRESURE		0x400000
91 #define MAC_CTRL_TX_HUGE			0x800000
92 #define MAC_CTRL_RX_CHKSUM_EN			0x1000000
93 #define MAC_CTRL_DBG				0x8000000
94 
95 /* Wake-On-Lan control register */
96 #define WOL_CLK_SWITCH_EN			0x8000
97 #define WOL_PT5_EN				0x200000
98 #define WOL_PT6_EN				0x400000
99 #define WOL_PT5_MATCH				0x8000000
100 #define WOL_PT6_MATCH				0x10000000
101 
102 /* WOL Length ( 2 DWORD ) */
103 #define REG_WOL_PATTERN_LEN			0x14A4
104 #define WOL_PT_LEN_MASK				0x7F
105 #define WOL_PT0_LEN_SHIFT			0
106 #define WOL_PT1_LEN_SHIFT			8
107 #define WOL_PT2_LEN_SHIFT			16
108 #define WOL_PT3_LEN_SHIFT			24
109 #define WOL_PT4_LEN_SHIFT			0
110 #define WOL_PT5_LEN_SHIFT			8
111 #define WOL_PT6_LEN_SHIFT			16
112 
113 /* Internal SRAM Partition Registers, low 32 bits */
114 #define REG_SRAM_RFD_LEN			0x1504
115 #define REG_SRAM_RRD_ADDR			0x1508
116 #define REG_SRAM_RRD_LEN			0x150C
117 #define REG_SRAM_TPD_ADDR			0x1510
118 #define REG_SRAM_TPD_LEN			0x1514
119 #define REG_SRAM_TRD_ADDR			0x1518
120 #define REG_SRAM_TRD_LEN			0x151C
121 #define REG_SRAM_RXF_ADDR			0x1520
122 #define REG_SRAM_RXF_LEN			0x1524
123 #define REG_SRAM_TXF_ADDR			0x1528
124 #define REG_SRAM_TXF_LEN			0x152C
125 #define REG_SRAM_TCPH_PATH_ADDR			0x1530
126 #define SRAM_TCPH_ADDR_MASK			0xFFF
127 #define SRAM_TCPH_ADDR_SHIFT			0
128 #define SRAM_PATH_ADDR_MASK			0xFFF
129 #define SRAM_PATH_ADDR_SHIFT			16
130 
131 /* Load Ptr Register */
132 #define REG_LOAD_PTR				0x1534
133 
134 /* Descriptor Control registers, low 32 bits */
135 #define REG_DESC_RFD_ADDR_LO			0x1544
136 #define REG_DESC_RRD_ADDR_LO			0x1548
137 #define REG_DESC_TPD_ADDR_LO			0x154C
138 #define REG_DESC_CMB_ADDR_LO			0x1550
139 #define REG_DESC_SMB_ADDR_LO			0x1554
140 #define REG_DESC_RFD_RRD_RING_SIZE		0x1558
141 #define DESC_RFD_RING_SIZE_MASK			0x7FF
142 #define DESC_RFD_RING_SIZE_SHIFT		0
143 #define DESC_RRD_RING_SIZE_MASK			0x7FF
144 #define DESC_RRD_RING_SIZE_SHIFT		16
145 #define REG_DESC_TPD_RING_SIZE			0x155C
146 #define DESC_TPD_RING_SIZE_MASK			0x3FF
147 #define DESC_TPD_RING_SIZE_SHIFT		0
148 
149 /* TXQ Control Register */
150 #define REG_TXQ_CTRL				0x1580
151 #define TXQ_CTRL_TPD_BURST_NUM_SHIFT		0
152 #define TXQ_CTRL_TPD_BURST_NUM_MASK		0x1F
153 #define TXQ_CTRL_EN				0x20
154 #define TXQ_CTRL_ENH_MODE			0x40
155 #define TXQ_CTRL_TPD_FETCH_TH_SHIFT		8
156 #define TXQ_CTRL_TPD_FETCH_TH_MASK		0x3F
157 #define TXQ_CTRL_TXF_BURST_NUM_SHIFT		16
158 #define TXQ_CTRL_TXF_BURST_NUM_MASK		0xFFFF
159 
160 /* Jumbo packet Threshold for task offload */
161 #define REG_TX_JUMBO_TASK_TH_TPD_IPG		0x1584
162 #define TX_JUMBO_TASK_TH_MASK			0x7FF
163 #define TX_JUMBO_TASK_TH_SHIFT			0
164 #define TX_TPD_MIN_IPG_MASK			0x1F
165 #define TX_TPD_MIN_IPG_SHIFT			16
166 
167 /* RXQ Control Register */
168 #define REG_RXQ_CTRL				0x15A0
169 #define RXQ_CTRL_RFD_BURST_NUM_SHIFT		0
170 #define RXQ_CTRL_RFD_BURST_NUM_MASK		0xFF
171 #define RXQ_CTRL_RRD_BURST_THRESH_SHIFT		8
172 #define RXQ_CTRL_RRD_BURST_THRESH_MASK		0xFF
173 #define RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT		16
174 #define RXQ_CTRL_RFD_PREF_MIN_IPG_MASK		0x1F
175 #define RXQ_CTRL_CUT_THRU_EN			0x40000000
176 #define RXQ_CTRL_EN				0x80000000
177 
178 /* Rx jumbo packet threshold and rrd  retirement timer */
179 #define REG_RXQ_JMBOSZ_RRDTIM			0x15A4
180 #define RXQ_JMBOSZ_TH_MASK			0x7FF
181 #define RXQ_JMBOSZ_TH_SHIFT			0
182 #define RXQ_JMBO_LKAH_MASK			0xF
183 #define RXQ_JMBO_LKAH_SHIFT			11
184 #define RXQ_RRD_TIMER_MASK			0xFFFF
185 #define RXQ_RRD_TIMER_SHIFT			16
186 
187 /* RFD flow control register */
188 #define REG_RXQ_RXF_PAUSE_THRESH		0x15A8
189 #define RXQ_RXF_PAUSE_TH_HI_SHIFT		16
190 #define RXQ_RXF_PAUSE_TH_HI_MASK		0xFFF
191 #define RXQ_RXF_PAUSE_TH_LO_SHIFT		0
192 #define RXQ_RXF_PAUSE_TH_LO_MASK		0xFFF
193 
194 /* RRD flow control register */
195 #define REG_RXQ_RRD_PAUSE_THRESH		0x15AC
196 #define RXQ_RRD_PAUSE_TH_HI_SHIFT		0
197 #define RXQ_RRD_PAUSE_TH_HI_MASK		0xFFF
198 #define RXQ_RRD_PAUSE_TH_LO_SHIFT		16
199 #define RXQ_RRD_PAUSE_TH_LO_MASK		0xFFF
200 
201 /* DMA Engine Control Register */
202 #define REG_DMA_CTRL				0x15C0
203 #define DMA_CTRL_DMAR_IN_ORDER			0x1
204 #define DMA_CTRL_DMAR_ENH_ORDER			0x2
205 #define DMA_CTRL_DMAR_OUT_ORDER			0x4
206 #define DMA_CTRL_RCB_VALUE			0x8
207 #define DMA_CTRL_DMAR_BURST_LEN_SHIFT		4
208 #define DMA_CTRL_DMAR_BURST_LEN_MASK		7
209 #define DMA_CTRL_DMAW_BURST_LEN_SHIFT		7
210 #define DMA_CTRL_DMAW_BURST_LEN_MASK		7
211 #define DMA_CTRL_DMAR_EN			0x400
212 #define DMA_CTRL_DMAW_EN			0x800
213 
214 /* CMB/SMB Control Register */
215 #define REG_CSMB_CTRL				0x15D0
216 #define CSMB_CTRL_CMB_NOW			1
217 #define CSMB_CTRL_SMB_NOW			2
218 #define CSMB_CTRL_CMB_EN			4
219 #define CSMB_CTRL_SMB_EN			8
220 
221 /* CMB DMA Write Threshold Register */
222 #define REG_CMB_WRITE_TH			0x15D4
223 #define CMB_RRD_TH_SHIFT			0
224 #define CMB_RRD_TH_MASK				0x7FF
225 #define CMB_TPD_TH_SHIFT			16
226 #define CMB_TPD_TH_MASK				0x7FF
227 
228 /* RX/TX count-down timer to trigger CMB-write. 2us resolution. */
229 #define REG_CMB_WRITE_TIMER			0x15D8
230 #define CMB_RX_TM_SHIFT				0
231 #define CMB_RX_TM_MASK				0xFFFF
232 #define CMB_TX_TM_SHIFT				16
233 #define CMB_TX_TM_MASK				0xFFFF
234 
235 /* Number of packet received since last CMB write */
236 #define REG_CMB_RX_PKT_CNT			0x15DC
237 
238 /* Number of packet transmitted since last CMB write */
239 #define REG_CMB_TX_PKT_CNT			0x15E0
240 
241 /* SMB auto DMA timer register */
242 #define REG_SMB_TIMER				0x15E4
243 
244 /* Mailbox Register */
245 #define REG_MAILBOX				0x15F0
246 #define MB_RFD_PROD_INDX_SHIFT			0
247 #define MB_RFD_PROD_INDX_MASK			0x7FF
248 #define MB_RRD_CONS_INDX_SHIFT			11
249 #define MB_RRD_CONS_INDX_MASK			0x7FF
250 #define MB_TPD_PROD_INDX_SHIFT			22
251 #define MB_TPD_PROD_INDX_MASK			0x3FF
252 
253 /* Interrupt Status Register */
254 #define ISR_SMB					0x1
255 #define ISR_TIMER				0x2
256 #define ISR_MANUAL				0x4
257 #define ISR_RXF_OV				0x8
258 #define ISR_RFD_UNRUN				0x10
259 #define ISR_RRD_OV				0x20
260 #define ISR_TXF_UNRUN				0x40
261 #define ISR_LINK				0x80
262 #define ISR_HOST_RFD_UNRUN			0x100
263 #define ISR_HOST_RRD_OV				0x200
264 #define ISR_DMAR_TO_RST				0x400
265 #define ISR_DMAW_TO_RST				0x800
266 #define ISR_GPHY				0x1000
267 #define ISR_RX_PKT				0x10000
268 #define ISR_TX_PKT				0x20000
269 #define ISR_TX_DMA				0x40000
270 #define ISR_RX_DMA				0x80000
271 #define ISR_CMB_RX				0x100000
272 #define ISR_CMB_TX				0x200000
273 #define ISR_MAC_RX				0x400000
274 #define ISR_MAC_TX				0x800000
275 #define ISR_DIS_SMB				0x20000000
276 #define ISR_DIS_DMA				0x40000000
277 
278 /* Normal Interrupt mask without RX/TX enabled */
279 #define IMR_NORXTX_MASK	(\
280 	ISR_SMB		|\
281 	ISR_GPHY	|\
282 	ISR_PHY_LINKDOWN|\
283 	ISR_DMAR_TO_RST	|\
284 	ISR_DMAW_TO_RST)
285 
286 /* Normal Interrupt mask  */
287 #define IMR_NORMAL_MASK	(\
288 	IMR_NORXTX_MASK	|\
289 	ISR_CMB_TX	|\
290 	ISR_CMB_RX)
291 
292 /* Debug Interrupt Mask  (enable all interrupt) */
293 #define IMR_DEBUG_MASK	(\
294 	ISR_SMB		|\
295 	ISR_TIMER	|\
296 	ISR_MANUAL	|\
297 	ISR_RXF_OV	|\
298 	ISR_RFD_UNRUN	|\
299 	ISR_RRD_OV	|\
300 	ISR_TXF_UNRUN	|\
301 	ISR_LINK	|\
302 	ISR_CMB_TX	|\
303 	ISR_CMB_RX	|\
304 	ISR_RX_PKT	|\
305 	ISR_TX_PKT	|\
306 	ISR_MAC_RX	|\
307 	ISR_MAC_TX)
308 
309 #define MEDIA_TYPE_1000M_FULL			1
310 #define MEDIA_TYPE_100M_FULL			2
311 #define MEDIA_TYPE_100M_HALF			3
312 #define MEDIA_TYPE_10M_FULL			4
313 #define MEDIA_TYPE_10M_HALF			5
314 
315 #define AUTONEG_ADVERTISE_SPEED_DEFAULT		0x002F	/* All but 1000-Half */
316 
317 #define MAX_JUMBO_FRAME_SIZE			10240
318 
319 #define ATL1_EEDUMP_LEN				48
320 
321 /* Statistics counters collected by the MAC */
322 struct stats_msg_block {
323 	/* rx */
324 	u32 rx_ok;		/* good RX packets */
325 	u32 rx_bcast;		/* good RX broadcast packets */
326 	u32 rx_mcast;		/* good RX multicast packets */
327 	u32 rx_pause;		/* RX pause frames */
328 	u32 rx_ctrl;		/* RX control packets other than pause frames */
329 	u32 rx_fcs_err;		/* RX packets with bad FCS */
330 	u32 rx_len_err;		/* RX packets with length != actual size */
331 	u32 rx_byte_cnt;	/* good bytes received. FCS is NOT included */
332 	u32 rx_runt;		/* RX packets < 64 bytes with good FCS */
333 	u32 rx_frag;		/* RX packets < 64 bytes with bad FCS */
334 	u32 rx_sz_64;		/* 64 byte RX packets */
335 	u32 rx_sz_65_127;
336 	u32 rx_sz_128_255;
337 	u32 rx_sz_256_511;
338 	u32 rx_sz_512_1023;
339 	u32 rx_sz_1024_1518;
340 	u32 rx_sz_1519_max;	/* 1519 byte to MTU RX packets */
341 	u32 rx_sz_ov;		/* truncated RX packets > MTU */
342 	u32 rx_rxf_ov;		/* frames dropped due to RX FIFO overflow */
343 	u32 rx_rrd_ov;		/* frames dropped due to RRD overflow */
344 	u32 rx_align_err;	/* alignment errors */
345 	u32 rx_bcast_byte_cnt;	/* RX broadcast bytes, excluding FCS */
346 	u32 rx_mcast_byte_cnt;	/* RX multicast bytes, excluding FCS */
347 	u32 rx_err_addr;	/* packets dropped due to address filtering */
348 
349 	/* tx */
350 	u32 tx_ok;		/* good TX packets */
351 	u32 tx_bcast;		/* good TX broadcast packets */
352 	u32 tx_mcast;		/* good TX multicast packets */
353 	u32 tx_pause;		/* TX pause frames */
354 	u32 tx_exc_defer;	/* TX packets deferred excessively */
355 	u32 tx_ctrl;		/* TX control frames, excluding pause frames */
356 	u32 tx_defer;		/* TX packets deferred */
357 	u32 tx_byte_cnt;	/* bytes transmitted, FCS is NOT included */
358 	u32 tx_sz_64;		/* 64 byte TX packets */
359 	u32 tx_sz_65_127;
360 	u32 tx_sz_128_255;
361 	u32 tx_sz_256_511;
362 	u32 tx_sz_512_1023;
363 	u32 tx_sz_1024_1518;
364 	u32 tx_sz_1519_max;	/* 1519 byte to MTU TX packets */
365 	u32 tx_1_col;		/* packets TX after a single collision */
366 	u32 tx_2_col;		/* packets TX after multiple collisions */
367 	u32 tx_late_col;	/* TX packets with late collisions */
368 	u32 tx_abort_col;	/* TX packets aborted w/excessive collisions */
369 	u32 tx_underrun;	/* TX packets aborted due to TX FIFO underrun
370 				 * or TRD FIFO underrun */
371 	u32 tx_rd_eop;		/* reads beyond the EOP into the next frame
372 				 * when TRD was not written timely */
373 	u32 tx_len_err;		/* TX packets where length != actual size */
374 	u32 tx_trunc;		/* TX packets truncated due to size > MTU */
375 	u32 tx_bcast_byte;	/* broadcast bytes transmitted, excluding FCS */
376 	u32 tx_mcast_byte;	/* multicast bytes transmitted, excluding FCS */
377 	u32 smb_updated;	/* 1: SMB Updated. This is used by software to
378 				 * indicate the statistics update. Software
379 				 * should clear this bit after retrieving the
380 				 * statistics information. */
381 };
382 
383 /* Coalescing Message Block */
384 struct coals_msg_block {
385 	u32 int_stats;		/* interrupt status */
386 	u16 rrd_prod_idx;	/* TRD Producer Index. */
387 	u16 rfd_cons_idx;	/* RFD Consumer Index. */
388 	u16 update;		/* Selene sets this bit every time it DMAs the
389 				 * CMB to host memory. Software should clear
390 				 * this bit when CMB info is processed. */
391 	u16 tpd_cons_idx;	/* TPD Consumer Index. */
392 };
393 
394 /* RRD descriptor */
395 struct rx_return_desc {
396 	u8 num_buf;	/* Number of RFD buffers used by the received packet */
397 	u8 resved;
398 	u16 buf_indx;	/* RFD Index of the first buffer */
399 	union {
400 		u32 valid;
401 		struct {
402 			u16 rx_chksum;
403 			u16 pkt_size;
404 		} xsum_sz;
405 	} xsz;
406 
407 	u16 pkt_flg;	/* Packet flags */
408 	u16 err_flg;	/* Error flags */
409 	u16 resved2;
410 	u16 vlan_tag;	/* VLAN TAG */
411 };
412 
413 #define PACKET_FLAG_ETH_TYPE	0x0080
414 #define PACKET_FLAG_VLAN_INS	0x0100
415 #define PACKET_FLAG_ERR		0x0200
416 #define PACKET_FLAG_IPV4	0x0400
417 #define PACKET_FLAG_UDP		0x0800
418 #define PACKET_FLAG_TCP		0x1000
419 #define PACKET_FLAG_BCAST	0x2000
420 #define PACKET_FLAG_MCAST	0x4000
421 #define PACKET_FLAG_PAUSE	0x8000
422 
423 #define ERR_FLAG_CRC		0x0001
424 #define ERR_FLAG_CODE		0x0002
425 #define ERR_FLAG_DRIBBLE	0x0004
426 #define ERR_FLAG_RUNT		0x0008
427 #define ERR_FLAG_OV		0x0010
428 #define ERR_FLAG_TRUNC		0x0020
429 #define ERR_FLAG_IP_CHKSUM	0x0040
430 #define ERR_FLAG_L4_CHKSUM	0x0080
431 #define ERR_FLAG_LEN		0x0100
432 #define ERR_FLAG_DES_ADDR	0x0200
433 
434 /* RFD descriptor */
435 struct rx_free_desc {
436 	__le64 buffer_addr;	/* Address of the descriptor's data buffer */
437 	__le16 buf_len;		/* Size of the receive buffer in host memory */
438 	u16 coalese;		/* Update consumer index to host after the
439 				 * reception of this frame */
440 	/* __packed is required */
441 } __packed;
442 
443 /*
444  * The L1 transmit packet descriptor is comprised of four 32-bit words.
445  *
446  *	31					0
447  *	+---------------------------------------+
448  *      |	Word 0: Buffer addr lo 		|
449  *      +---------------------------------------+
450  *      |	Word 1: Buffer addr hi		|
451  *      +---------------------------------------+
452  *      |		Word 2			|
453  *      +---------------------------------------+
454  *      |		Word 3			|
455  *      +---------------------------------------+
456  *
457  * Words 0 and 1 combine to form a 64-bit buffer address.
458  *
459  * Word 2 is self explanatory in the #define block below.
460  *
461  * Word 3 has two forms, depending upon the state of bits 3 and 4.
462  * If bits 3 and 4 are both zero, then bits 14:31 are unused by the
463  * hardware.  Otherwise, if either bit 3 or 4 is set, the definition
464  * of bits 14:31 vary according to the following depiction.
465  *
466  *	0	End of packet			0	End of packet
467  *	1	Coalesce			1	Coalesce
468  *	2	Insert VLAN tag			2	Insert VLAN tag
469  *	3	Custom csum enable = 0		3	Custom csum enable = 1
470  *	4	Segment enable = 1		4	Segment enable = 0
471  *	5	Generate IP checksum		5	Generate IP checksum
472  *	6	Generate TCP checksum		6	Generate TCP checksum
473  *	7	Generate UDP checksum		7	Generate UDP checksum
474  *	8	VLAN tagged			8	VLAN tagged
475  *	9	Ethernet frame type		9	Ethernet frame type
476  *	10-+ 					10-+
477  *	11 |	IP hdr length (10:13)		11 |	IP hdr length (10:13)
478  *	12 |	(num 32-bit words)		12 |	(num 32-bit words)
479  *	13-+					13-+
480  *	14-+					14	Unused
481  *	15 |	TCP hdr length (14:17)		15	Unused
482  *	16 |	(num 32-bit words)		16-+
483  *	17-+					17 |
484  *	18	Header TPD flag			18 |
485  *	19-+					19 |	Payload offset
486  *	20 |					20 |	    (16:23)
487  *	21 |					21 |
488  *	22 |					22 |
489  *	23 |					23-+
490  *	24 |					24-+
491  *	25 |	MSS (19:31)			25 |
492  *	26 |					26 |
493  *	27 |					27 |	Custom csum offset
494  *	28 |					28 |	     (24:31)
495  *	29 |					29 |
496  *	30 |					30 |
497  *	31-+					31-+
498  */
499 
500 /* tpd word 2 */
501 #define TPD_BUFLEN_MASK		0x3FFF
502 #define TPD_BUFLEN_SHIFT	0
503 #define TPD_DMAINT_MASK		0x0001
504 #define TPD_DMAINT_SHIFT	14
505 #define TPD_PKTNT_MASK		0x0001
506 #define TPD_PKTINT_SHIFT	15
507 #define TPD_VLANTAG_MASK	0xFFFF
508 #define TPD_VLANTAG_SHIFT	16
509 
510 /* tpd word 3 bits 0:13 */
511 #define TPD_EOP_MASK		0x0001
512 #define TPD_EOP_SHIFT		0
513 #define TPD_COALESCE_MASK	0x0001
514 #define TPD_COALESCE_SHIFT	1
515 #define TPD_INS_VL_TAG_MASK	0x0001
516 #define TPD_INS_VL_TAG_SHIFT	2
517 #define TPD_CUST_CSUM_EN_MASK	0x0001
518 #define TPD_CUST_CSUM_EN_SHIFT	3
519 #define TPD_SEGMENT_EN_MASK	0x0001
520 #define TPD_SEGMENT_EN_SHIFT	4
521 #define TPD_IP_CSUM_MASK	0x0001
522 #define TPD_IP_CSUM_SHIFT	5
523 #define TPD_TCP_CSUM_MASK	0x0001
524 #define TPD_TCP_CSUM_SHIFT	6
525 #define TPD_UDP_CSUM_MASK	0x0001
526 #define TPD_UDP_CSUM_SHIFT	7
527 #define TPD_VL_TAGGED_MASK	0x0001
528 #define TPD_VL_TAGGED_SHIFT	8
529 #define TPD_ETHTYPE_MASK	0x0001
530 #define TPD_ETHTYPE_SHIFT	9
531 #define TPD_IPHL_MASK		0x000F
532 #define TPD_IPHL_SHIFT		10
533 
534 /* tpd word 3 bits 14:31 if segment enabled */
535 #define TPD_TCPHDRLEN_MASK	0x000F
536 #define TPD_TCPHDRLEN_SHIFT	14
537 #define TPD_HDRFLAG_MASK	0x0001
538 #define TPD_HDRFLAG_SHIFT	18
539 #define TPD_MSS_MASK		0x1FFF
540 #define TPD_MSS_SHIFT		19
541 
542 /* tpd word 3 bits 16:31 if custom csum enabled */
543 #define TPD_PLOADOFFSET_MASK	0x00FF
544 #define TPD_PLOADOFFSET_SHIFT	16
545 #define TPD_CCSUMOFFSET_MASK	0x00FF
546 #define TPD_CCSUMOFFSET_SHIFT	24
547 
548 struct tx_packet_desc {
549 	__le64 buffer_addr;
550 	__le32 word2;
551 	__le32 word3;
552 };
553 
554 /* DMA Order Settings */
555 enum atl1_dma_order {
556 	atl1_dma_ord_in = 1,
557 	atl1_dma_ord_enh = 2,
558 	atl1_dma_ord_out = 4
559 };
560 
561 enum atl1_dma_rcb {
562 	atl1_rcb_64 = 0,
563 	atl1_rcb_128 = 1
564 };
565 
566 enum atl1_dma_req_block {
567 	atl1_dma_req_128 = 0,
568 	atl1_dma_req_256 = 1,
569 	atl1_dma_req_512 = 2,
570 	atl1_dma_req_1024 = 3,
571 	atl1_dma_req_2048 = 4,
572 	atl1_dma_req_4096 = 5
573 };
574 
575 #define ATL1_MAX_INTR		3
576 #define ATL1_MAX_TX_BUF_LEN	0x3000	/* 12288 bytes */
577 
578 #define ATL1_DEFAULT_TPD	256
579 #define ATL1_MAX_TPD		1024
580 #define ATL1_MIN_TPD		64
581 #define ATL1_DEFAULT_RFD	512
582 #define ATL1_MIN_RFD		128
583 #define ATL1_MAX_RFD		2048
584 #define ATL1_REG_COUNT		1538
585 
586 #define ATL1_GET_DESC(R, i, type)	(&(((type *)((R)->desc))[i]))
587 #define ATL1_RFD_DESC(R, i)	ATL1_GET_DESC(R, i, struct rx_free_desc)
588 #define ATL1_TPD_DESC(R, i)	ATL1_GET_DESC(R, i, struct tx_packet_desc)
589 #define ATL1_RRD_DESC(R, i)	ATL1_GET_DESC(R, i, struct rx_return_desc)
590 
591 /*
592  * atl1_ring_header represents a single, contiguous block of DMA space
593  * mapped for the three descriptor rings (tpd, rfd, rrd) and the two
594  * message blocks (cmb, smb) described below
595  */
596 struct atl1_ring_header {
597 	void *desc;		/* virtual address */
598 	dma_addr_t dma;		/* physical address*/
599 	unsigned int size;	/* length in bytes */
600 };
601 
602 /*
603  * atl1_buffer is wrapper around a pointer to a socket buffer
604  * so a DMA handle can be stored along with the skb
605  */
606 struct atl1_buffer {
607 	struct sk_buff *skb;	/* socket buffer */
608 	u16 length;		/* rx buffer length */
609 	u16 alloced;		/* 1 if skb allocated */
610 	dma_addr_t dma;
611 };
612 
613 /* transmit packet descriptor (tpd) ring */
614 struct atl1_tpd_ring {
615 	void *desc;		/* descriptor ring virtual address */
616 	dma_addr_t dma;		/* descriptor ring physical address */
617 	u16 size;		/* descriptor ring length in bytes */
618 	u16 count;		/* number of descriptors in the ring */
619 	u16 hw_idx;		/* hardware index */
620 	atomic_t next_to_clean;
621 	atomic_t next_to_use;
622 	struct atl1_buffer *buffer_info;
623 };
624 
625 /* receive free descriptor (rfd) ring */
626 struct atl1_rfd_ring {
627 	void *desc;		/* descriptor ring virtual address */
628 	dma_addr_t dma;		/* descriptor ring physical address */
629 	u16 size;		/* descriptor ring length in bytes */
630 	u16 count;		/* number of descriptors in the ring */
631 	atomic_t next_to_use;
632 	u16 next_to_clean;
633 	struct atl1_buffer *buffer_info;
634 };
635 
636 /* receive return descriptor (rrd) ring */
637 struct atl1_rrd_ring {
638 	void *desc;		/* descriptor ring virtual address */
639 	dma_addr_t dma;		/* descriptor ring physical address */
640 	unsigned int size;	/* descriptor ring length in bytes */
641 	u16 count;		/* number of descriptors in the ring */
642 	u16 next_to_use;
643 	atomic_t next_to_clean;
644 };
645 
646 /* coalescing message block (cmb) */
647 struct atl1_cmb {
648 	struct coals_msg_block *cmb;
649 	dma_addr_t dma;
650 };
651 
652 /* statistics message block (smb) */
653 struct atl1_smb {
654 	struct stats_msg_block *smb;
655 	dma_addr_t dma;
656 };
657 
658 /* Statistics counters */
659 struct atl1_sft_stats {
660 	u64 rx_packets;
661 	u64 tx_packets;
662 	u64 rx_bytes;
663 	u64 tx_bytes;
664 	u64 multicast;
665 	u64 collisions;
666 	u64 rx_errors;
667 	u64 rx_length_errors;
668 	u64 rx_crc_errors;
669 	u64 rx_dropped;
670 	u64 rx_frame_errors;
671 	u64 rx_fifo_errors;
672 	u64 rx_missed_errors;
673 	u64 tx_errors;
674 	u64 tx_fifo_errors;
675 	u64 tx_aborted_errors;
676 	u64 tx_window_errors;
677 	u64 tx_carrier_errors;
678 	u64 tx_pause;		/* TX pause frames */
679 	u64 excecol;		/* TX packets w/ excessive collisions */
680 	u64 deffer;		/* TX packets deferred */
681 	u64 scc;		/* packets TX after a single collision */
682 	u64 mcc;		/* packets TX after multiple collisions */
683 	u64 latecol;		/* TX packets w/ late collisions */
684 	u64 tx_underun;		/* TX packets aborted due to TX FIFO underrun
685 				 * or TRD FIFO underrun */
686 	u64 tx_trunc;		/* TX packets truncated due to size > MTU */
687 	u64 rx_pause;		/* num Pause packets received. */
688 	u64 rx_rrd_ov;
689 	u64 rx_trunc;
690 };
691 
692 /* hardware structure */
693 struct atl1_hw {
694 	u8 __iomem *hw_addr;
695 	struct atl1_adapter *back;
696 	enum atl1_dma_order dma_ord;
697 	enum atl1_dma_rcb rcb_value;
698 	enum atl1_dma_req_block dmar_block;
699 	enum atl1_dma_req_block dmaw_block;
700 	u8 preamble_len;
701 	u8 max_retry;
702 	u8 jam_ipg;		/* IPG to start JAM for collision based flow
703 				 * control in half-duplex mode. In units of
704 				 * 8-bit time */
705 	u8 ipgt;		/* Desired back to back inter-packet gap.
706 				 * The default is 96-bit time */
707 	u8 min_ifg;		/* Minimum number of IFG to enforce in between
708 				 * receive frames. Frame gap below such IFP
709 				 * is dropped */
710 	u8 ipgr1;		/* 64bit Carrier-Sense window */
711 	u8 ipgr2;		/* 96-bit IPG window */
712 	u8 tpd_burst;		/* Number of TPD to prefetch in cache-aligned
713 				 * burst. Each TPD is 16 bytes long */
714 	u8 rfd_burst;		/* Number of RFD to prefetch in cache-aligned
715 				 * burst. Each RFD is 12 bytes long */
716 	u8 rfd_fetch_gap;
717 	u8 rrd_burst;		/* Threshold number of RRDs that can be retired
718 				 * in a burst. Each RRD is 16 bytes long */
719 	u8 tpd_fetch_th;
720 	u8 tpd_fetch_gap;
721 	u16 tx_jumbo_task_th;
722 	u16 txf_burst;		/* Number of data bytes to read in a cache-
723 				 * aligned burst. Each SRAM entry is 8 bytes */
724 	u16 rx_jumbo_th;	/* Jumbo packet size for non-VLAN packet. VLAN
725 				 * packets should add 4 bytes */
726 	u16 rx_jumbo_lkah;
727 	u16 rrd_ret_timer;	/* RRD retirement timer. Decrement by 1 after
728 				 * every 512ns passes. */
729 	u16 lcol;		/* Collision Window */
730 
731 	u16 cmb_tpd;
732 	u16 cmb_rrd;
733 	u16 cmb_rx_timer;
734 	u16 cmb_tx_timer;
735 	u32 smb_timer;
736 	u16 media_type;
737 	u16 autoneg_advertised;
738 
739 	u16 mii_autoneg_adv_reg;
740 	u16 mii_1000t_ctrl_reg;
741 
742 	u32 max_frame_size;
743 	u32 min_frame_size;
744 
745 	u16 dev_rev;
746 
747 	/* spi flash */
748 	u8 flash_vendor;
749 
750 	u8 mac_addr[ETH_ALEN];
751 	u8 perm_mac_addr[ETH_ALEN];
752 
753 	bool phy_configured;
754 };
755 
756 struct atl1_adapter {
757 	struct net_device *netdev;
758 	struct pci_dev *pdev;
759 
760 	struct atl1_sft_stats soft_stats;
761 	u32 rx_buffer_len;
762 	u32 wol;
763 	u16 link_speed;
764 	u16 link_duplex;
765 	spinlock_t lock;
766 	struct napi_struct napi;
767 	struct work_struct reset_dev_task;
768 	struct work_struct link_chg_task;
769 
770 	struct timer_list phy_config_timer;
771 	bool phy_timer_pending;
772 
773 	/* all descriptor rings' memory */
774 	struct atl1_ring_header ring_header;
775 
776 	/* TX */
777 	struct atl1_tpd_ring tpd_ring;
778 	spinlock_t mb_lock;
779 
780 	/* RX */
781 	struct atl1_rfd_ring rfd_ring;
782 	struct atl1_rrd_ring rrd_ring;
783 	u64 hw_csum_err;
784 	u64 hw_csum_good;
785 	u32 msg_enable;
786 	u16 imt;		/* interrupt moderator timer (2us resolution) */
787 	u16 ict;		/* interrupt clear timer (2us resolution */
788 	struct mii_if_info mii;	/* MII interface info */
789 
790 	/*
791 	 * Use this value to check is napi handler allowed to
792 	 * enable ints or not
793 	 */
794 	bool int_enabled;
795 
796 	u32 bd_number;		/* board number */
797 	bool pci_using_64;
798 	struct atl1_hw hw;
799 	struct atl1_smb smb;
800 	struct atl1_cmb cmb;
801 };
802 
803 #endif /* ATL1_H */
804