1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
4  * Copyright(c) 2007 xiong huang <xiong.huang@atheros.com>
5  *
6  * Derived from Intel e1000 driver
7  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
8  */
9 
10 #ifndef _ATL1E_H_
11 #define _ATL1E_H_
12 
13 #include <linux/interrupt.h>
14 #include <linux/types.h>
15 #include <linux/errno.h>
16 #include <linux/module.h>
17 #include <linux/pci.h>
18 #include <linux/netdevice.h>
19 #include <linux/etherdevice.h>
20 #include <linux/skbuff.h>
21 #include <linux/ioport.h>
22 #include <linux/slab.h>
23 #include <linux/list.h>
24 #include <linux/delay.h>
25 #include <linux/sched.h>
26 #include <linux/in.h>
27 #include <linux/ip.h>
28 #include <linux/ipv6.h>
29 #include <linux/udp.h>
30 #include <linux/mii.h>
31 #include <linux/io.h>
32 #include <linux/vmalloc.h>
33 #include <linux/pagemap.h>
34 #include <linux/tcp.h>
35 #include <linux/ethtool.h>
36 #include <linux/if_vlan.h>
37 #include <linux/workqueue.h>
38 #include <net/checksum.h>
39 #include <net/ip6_checksum.h>
40 
41 #include "atl1e_hw.h"
42 
43 #define PCI_REG_COMMAND	 0x04    /* PCI Command Register */
44 #define CMD_IO_SPACE	 0x0001
45 #define CMD_MEMORY_SPACE 0x0002
46 #define CMD_BUS_MASTER   0x0004
47 
48 #define BAR_0   0
49 #define BAR_1   1
50 #define BAR_5   5
51 
52 /* Wake Up Filter Control */
53 #define AT_WUFC_LNKC 0x00000001 /* Link Status Change Wakeup Enable */
54 #define AT_WUFC_MAG  0x00000002 /* Magic Packet Wakeup Enable */
55 #define AT_WUFC_EX   0x00000004 /* Directed Exact Wakeup Enable */
56 #define AT_WUFC_MC   0x00000008 /* Multicast Wakeup Enable */
57 #define AT_WUFC_BC   0x00000010 /* Broadcast Wakeup Enable */
58 
59 #define SPEED_0		   0xffff
60 #define HALF_DUPLEX        1
61 #define FULL_DUPLEX        2
62 
63 /* Error Codes */
64 #define AT_ERR_EEPROM      1
65 #define AT_ERR_PHY         2
66 #define AT_ERR_CONFIG      3
67 #define AT_ERR_PARAM       4
68 #define AT_ERR_MAC_TYPE    5
69 #define AT_ERR_PHY_TYPE    6
70 #define AT_ERR_PHY_SPEED   7
71 #define AT_ERR_PHY_RES     8
72 #define AT_ERR_TIMEOUT     9
73 
74 #define MAX_JUMBO_FRAME_SIZE 0x2000
75 
76 #define AT_VLAN_TAG_TO_TPD_TAG(_vlan, _tpd)    \
77 	_tpd = (((_vlan) << (4)) | (((_vlan) >> 13) & 7) |\
78 		 (((_vlan) >> 9) & 8))
79 
80 #define AT_TPD_TAG_TO_VLAN_TAG(_tpd, _vlan)    \
81 	_vlan = (((_tpd) >> 8) | (((_tpd) & 0x77) << 9) |\
82 		   (((_tdp) & 0x88) << 5))
83 
84 #define AT_MAX_RECEIVE_QUEUE    4
85 #define AT_PAGE_NUM_PER_QUEUE   2
86 
87 #define AT_DMA_HI_ADDR_MASK     0xffffffff00000000ULL
88 #define AT_DMA_LO_ADDR_MASK     0x00000000ffffffffULL
89 
90 #define AT_TX_WATCHDOG  (5 * HZ)
91 #define AT_MAX_INT_WORK		10
92 #define AT_TWSI_EEPROM_TIMEOUT 	100
93 #define AT_HW_MAX_IDLE_DELAY 	10
94 #define AT_SUSPEND_LINK_TIMEOUT 28
95 
96 #define AT_REGS_LEN	75
97 #define AT_EEPROM_LEN 	512
98 #define AT_ADV_MASK	(ADVERTISE_10_HALF  |\
99 			 ADVERTISE_10_FULL  |\
100 			 ADVERTISE_100_HALF |\
101 			 ADVERTISE_100_FULL |\
102 			 ADVERTISE_1000_FULL)
103 
104 /* tpd word 2 */
105 #define TPD_BUFLEN_MASK 	0x3FFF
106 #define TPD_BUFLEN_SHIFT        0
107 #define TPD_DMAINT_MASK		0x0001
108 #define TPD_DMAINT_SHIFT        14
109 #define TPD_PKTNT_MASK          0x0001
110 #define TPD_PKTINT_SHIFT        15
111 #define TPD_VLANTAG_MASK        0xFFFF
112 #define TPD_VLAN_SHIFT          16
113 
114 /* tpd word 3 bits 0:4 */
115 #define TPD_EOP_MASK            0x0001
116 #define TPD_EOP_SHIFT           0
117 #define TPD_IP_VERSION_MASK	0x0001
118 #define TPD_IP_VERSION_SHIFT	1	/* 0 : IPV4, 1 : IPV6 */
119 #define TPD_INS_VL_TAG_MASK	0x0001
120 #define TPD_INS_VL_TAG_SHIFT	2
121 #define TPD_CC_SEGMENT_EN_MASK	0x0001
122 #define TPD_CC_SEGMENT_EN_SHIFT	3
123 #define TPD_SEGMENT_EN_MASK     0x0001
124 #define TPD_SEGMENT_EN_SHIFT    4
125 
126 /* tdp word 3 bits 5:7 if ip version is 0 */
127 #define TPD_IP_CSUM_MASK        0x0001
128 #define TPD_IP_CSUM_SHIFT       5
129 #define TPD_TCP_CSUM_MASK       0x0001
130 #define TPD_TCP_CSUM_SHIFT      6
131 #define TPD_UDP_CSUM_MASK       0x0001
132 #define TPD_UDP_CSUM_SHIFT      7
133 
134 /* tdp word 3 bits 5:7 if ip version is 1 */
135 #define TPD_V6_IPHLLO_MASK	0x0007
136 #define TPD_V6_IPHLLO_SHIFT	7
137 
138 /* tpd word 3 bits 8:9 bit */
139 #define TPD_VL_TAGGED_MASK      0x0001
140 #define TPD_VL_TAGGED_SHIFT     8
141 #define TPD_ETHTYPE_MASK        0x0001
142 #define TPD_ETHTYPE_SHIFT       9
143 
144 /* tdp word 3 bits 10:13 if ip version is 0 */
145 #define TDP_V4_IPHL_MASK	0x000F
146 #define TPD_V4_IPHL_SHIFT	10
147 
148 /* tdp word 3 bits 10:13 if ip version is 1 */
149 #define TPD_V6_IPHLHI_MASK	0x000F
150 #define TPD_V6_IPHLHI_SHIFT	10
151 
152 /* tpd word 3 bit 14:31 if segment enabled */
153 #define TPD_TCPHDRLEN_MASK      0x000F
154 #define TPD_TCPHDRLEN_SHIFT     14
155 #define TPD_HDRFLAG_MASK        0x0001
156 #define TPD_HDRFLAG_SHIFT       18
157 #define TPD_MSS_MASK            0x1FFF
158 #define TPD_MSS_SHIFT           19
159 
160 /* tdp word 3 bit 16:31 if custom csum enabled */
161 #define TPD_PLOADOFFSET_MASK    0x00FF
162 #define TPD_PLOADOFFSET_SHIFT   16
163 #define TPD_CCSUMOFFSET_MASK    0x00FF
164 #define TPD_CCSUMOFFSET_SHIFT   24
165 
166 struct atl1e_tpd_desc {
167 	__le64 buffer_addr;
168 	__le32 word2;
169 	__le32 word3;
170 };
171 
172 /* how about 0x2000 */
173 #define MAX_TX_BUF_LEN      0x2000
174 #define MAX_TX_BUF_SHIFT    13
175 #define MAX_TSO_SEG_SIZE    0x3c00
176 
177 /* rrs word 1 bit 0:31 */
178 #define RRS_RX_CSUM_MASK	0xFFFF
179 #define RRS_RX_CSUM_SHIFT	0
180 #define RRS_PKT_SIZE_MASK	0x3FFF
181 #define RRS_PKT_SIZE_SHIFT	16
182 #define RRS_CPU_NUM_MASK	0x0003
183 #define	RRS_CPU_NUM_SHIFT	30
184 
185 #define	RRS_IS_RSS_IPV4		0x0001
186 #define RRS_IS_RSS_IPV4_TCP	0x0002
187 #define RRS_IS_RSS_IPV6		0x0004
188 #define RRS_IS_RSS_IPV6_TCP	0x0008
189 #define RRS_IS_IPV6		0x0010
190 #define RRS_IS_IP_FRAG		0x0020
191 #define RRS_IS_IP_DF		0x0040
192 #define RRS_IS_802_3		0x0080
193 #define RRS_IS_VLAN_TAG		0x0100
194 #define RRS_IS_ERR_FRAME	0x0200
195 #define RRS_IS_IPV4		0x0400
196 #define RRS_IS_UDP		0x0800
197 #define RRS_IS_TCP		0x1000
198 #define RRS_IS_BCAST		0x2000
199 #define RRS_IS_MCAST		0x4000
200 #define RRS_IS_PAUSE		0x8000
201 
202 #define RRS_ERR_BAD_CRC		0x0001
203 #define RRS_ERR_CODE		0x0002
204 #define RRS_ERR_DRIBBLE		0x0004
205 #define RRS_ERR_RUNT		0x0008
206 #define RRS_ERR_RX_OVERFLOW	0x0010
207 #define RRS_ERR_TRUNC		0x0020
208 #define RRS_ERR_IP_CSUM		0x0040
209 #define RRS_ERR_L4_CSUM		0x0080
210 #define RRS_ERR_LENGTH		0x0100
211 #define RRS_ERR_DES_ADDR	0x0200
212 
213 struct atl1e_recv_ret_status {
214 	u16 seq_num;
215 	u16 hash_lo;
216 	__le32	word1;
217 	u16 pkt_flag;
218 	u16 err_flag;
219 	u16 hash_hi;
220 	u16 vtag;
221 };
222 
223 enum atl1e_dma_req_block {
224 	atl1e_dma_req_128 = 0,
225 	atl1e_dma_req_256 = 1,
226 	atl1e_dma_req_512 = 2,
227 	atl1e_dma_req_1024 = 3,
228 	atl1e_dma_req_2048 = 4,
229 	atl1e_dma_req_4096 = 5
230 };
231 
232 enum atl1e_rrs_type {
233 	atl1e_rrs_disable = 0,
234 	atl1e_rrs_ipv4 = 1,
235 	atl1e_rrs_ipv4_tcp = 2,
236 	atl1e_rrs_ipv6 = 4,
237 	atl1e_rrs_ipv6_tcp = 8
238 };
239 
240 enum atl1e_nic_type {
241 	athr_l1e = 0,
242 	athr_l2e_revA = 1,
243 	athr_l2e_revB = 2
244 };
245 
246 struct atl1e_hw_stats {
247 	/* rx */
248 	unsigned long rx_ok;	      /* The number of good packet received. */
249 	unsigned long rx_bcast;       /* The number of good broadcast packet received. */
250 	unsigned long rx_mcast;       /* The number of good multicast packet received. */
251 	unsigned long rx_pause;       /* The number of Pause packet received. */
252 	unsigned long rx_ctrl;        /* The number of Control packet received other than Pause frame. */
253 	unsigned long rx_fcs_err;     /* The number of packets with bad FCS. */
254 	unsigned long rx_len_err;     /* The number of packets with mismatch of length field and actual size. */
255 	unsigned long rx_byte_cnt;    /* The number of bytes of good packet received. FCS is NOT included. */
256 	unsigned long rx_runt;        /* The number of packets received that are less than 64 byte long and with good FCS. */
257 	unsigned long rx_frag;        /* The number of packets received that are less than 64 byte long and with bad FCS. */
258 	unsigned long rx_sz_64;       /* The number of good and bad packets received that are 64 byte long. */
259 	unsigned long rx_sz_65_127;   /* The number of good and bad packets received that are between 65 and 127-byte long. */
260 	unsigned long rx_sz_128_255;  /* The number of good and bad packets received that are between 128 and 255-byte long. */
261 	unsigned long rx_sz_256_511;  /* The number of good and bad packets received that are between 256 and 511-byte long. */
262 	unsigned long rx_sz_512_1023; /* The number of good and bad packets received that are between 512 and 1023-byte long. */
263 	unsigned long rx_sz_1024_1518;    /* The number of good and bad packets received that are between 1024 and 1518-byte long. */
264 	unsigned long rx_sz_1519_max; /* The number of good and bad packets received that are between 1519-byte and MTU. */
265 	unsigned long rx_sz_ov;       /* The number of good and bad packets received that are more than MTU size truncated by Selene. */
266 	unsigned long rx_rxf_ov;      /* The number of frame dropped due to occurrence of RX FIFO overflow. */
267 	unsigned long rx_rrd_ov;      /* The number of frame dropped due to occurrence of RRD overflow. */
268 	unsigned long rx_align_err;   /* Alignment Error */
269 	unsigned long rx_bcast_byte_cnt;  /* The byte count of broadcast packet received, excluding FCS. */
270 	unsigned long rx_mcast_byte_cnt;  /* The byte count of multicast packet received, excluding FCS. */
271 	unsigned long rx_err_addr;    /* The number of packets dropped due to address filtering. */
272 
273 	/* tx */
274 	unsigned long tx_ok;      /* The number of good packet transmitted. */
275 	unsigned long tx_bcast;       /* The number of good broadcast packet transmitted. */
276 	unsigned long tx_mcast;       /* The number of good multicast packet transmitted. */
277 	unsigned long tx_pause;       /* The number of Pause packet transmitted. */
278 	unsigned long tx_exc_defer;   /* The number of packets transmitted with excessive deferral. */
279 	unsigned long tx_ctrl;        /* The number of packets transmitted is a control frame, excluding Pause frame. */
280 	unsigned long tx_defer;       /* The number of packets transmitted that is deferred. */
281 	unsigned long tx_byte_cnt;    /* The number of bytes of data transmitted. FCS is NOT included. */
282 	unsigned long tx_sz_64;       /* The number of good and bad packets transmitted that are 64 byte long. */
283 	unsigned long tx_sz_65_127;   /* The number of good and bad packets transmitted that are between 65 and 127-byte long. */
284 	unsigned long tx_sz_128_255;  /* The number of good and bad packets transmitted that are between 128 and 255-byte long. */
285 	unsigned long tx_sz_256_511;  /* The number of good and bad packets transmitted that are between 256 and 511-byte long. */
286 	unsigned long tx_sz_512_1023; /* The number of good and bad packets transmitted that are between 512 and 1023-byte long. */
287 	unsigned long tx_sz_1024_1518;    /* The number of good and bad packets transmitted that are between 1024 and 1518-byte long. */
288 	unsigned long tx_sz_1519_max; /* The number of good and bad packets transmitted that are between 1519-byte and MTU. */
289 	unsigned long tx_1_col;       /* The number of packets subsequently transmitted successfully with a single prior collision. */
290 	unsigned long tx_2_col;       /* The number of packets subsequently transmitted successfully with multiple prior collisions. */
291 	unsigned long tx_late_col;    /* The number of packets transmitted with late collisions. */
292 	unsigned long tx_abort_col;   /* The number of transmit packets aborted due to excessive collisions. */
293 	unsigned long tx_underrun;    /* The number of transmit packets aborted due to transmit FIFO underrun, or TRD FIFO underrun */
294 	unsigned long tx_rd_eop;      /* The number of times that read beyond the EOP into the next frame area when TRD was not written timely */
295 	unsigned long tx_len_err;     /* The number of transmit packets with length field does NOT match the actual frame size. */
296 	unsigned long tx_trunc;       /* The number of transmit packets truncated due to size exceeding MTU. */
297 	unsigned long tx_bcast_byte;  /* The byte count of broadcast packet transmitted, excluding FCS. */
298 	unsigned long tx_mcast_byte;  /* The byte count of multicast packet transmitted, excluding FCS. */
299 };
300 
301 struct atl1e_hw {
302 	u8 __iomem      *hw_addr;            /* inner register address */
303 	resource_size_t mem_rang;
304 	struct atl1e_adapter *adapter;
305 	enum atl1e_nic_type  nic_type;
306 	u16 device_id;
307 	u16 vendor_id;
308 	u16 subsystem_id;
309 	u16 subsystem_vendor_id;
310 	u8  revision_id;
311 	u16 pci_cmd_word;
312 	u8 mac_addr[ETH_ALEN];
313 	u8 perm_mac_addr[ETH_ALEN];
314 	u8 preamble_len;
315 	u16 max_frame_size;
316 	u16 rx_jumbo_th;
317 	u16 tx_jumbo_th;
318 
319 	u16 media_type;
320 #define MEDIA_TYPE_AUTO_SENSOR  0
321 #define MEDIA_TYPE_100M_FULL    1
322 #define MEDIA_TYPE_100M_HALF    2
323 #define MEDIA_TYPE_10M_FULL     3
324 #define MEDIA_TYPE_10M_HALF     4
325 
326 	u16 autoneg_advertised;
327 #define ADVERTISE_10_HALF               0x0001
328 #define ADVERTISE_10_FULL               0x0002
329 #define ADVERTISE_100_HALF              0x0004
330 #define ADVERTISE_100_FULL              0x0008
331 #define ADVERTISE_1000_HALF             0x0010 /* Not used, just FYI */
332 #define ADVERTISE_1000_FULL             0x0020
333 	u16 mii_autoneg_adv_reg;
334 	u16 mii_1000t_ctrl_reg;
335 
336 	u16 imt;        /* Interrupt Moderator timer ( 2us resolution) */
337 	u16 ict;        /* Interrupt Clear timer (2us resolution) */
338 	u32 smb_timer;
339 	u16 rrd_thresh; /* Threshold of number of RRD produced to trigger
340 			  interrupt request */
341 	u16 tpd_thresh;
342 	u16 rx_count_down; /* 2us resolution */
343 	u16 tx_count_down;
344 
345 	u8 tpd_burst;   /* Number of TPD to prefetch in cache-aligned burst. */
346 	enum atl1e_rrs_type rrs_type;
347 	u32 base_cpu;
348 	u32 indirect_tab;
349 
350 	enum atl1e_dma_req_block dmar_block;
351 	enum atl1e_dma_req_block dmaw_block;
352 	u8 dmaw_dly_cnt;
353 	u8 dmar_dly_cnt;
354 
355 	bool phy_configured;
356 	bool re_autoneg;
357 	bool emi_ca;
358 };
359 
360 /*
361  * wrapper around a pointer to a socket buffer,
362  * so a DMA handle can be stored along with the buffer
363  */
364 struct atl1e_tx_buffer {
365 	struct sk_buff *skb;
366 	u16 flags;
367 #define ATL1E_TX_PCIMAP_SINGLE		0x0001
368 #define ATL1E_TX_PCIMAP_PAGE		0x0002
369 #define ATL1E_TX_PCIMAP_TYPE_MASK	0x0003
370 	u16 length;
371 	dma_addr_t dma;
372 };
373 
374 #define ATL1E_SET_PCIMAP_TYPE(tx_buff, type) do {		\
375 	((tx_buff)->flags) &= ~ATL1E_TX_PCIMAP_TYPE_MASK;	\
376 	((tx_buff)->flags) |= (type);				\
377 	} while (0)
378 
379 struct atl1e_rx_page {
380 	dma_addr_t	dma;    /* receive rage DMA address */
381 	u8		*addr;   /* receive rage virtual address */
382 	dma_addr_t	write_offset_dma;  /* the DMA address which contain the
383 					      receive data offset in the page */
384 	u32		*write_offset_addr; /* the virtaul address which contain
385 					     the receive data offset in the page */
386 	u32		read_offset;       /* the offset where we have read */
387 };
388 
389 struct atl1e_rx_page_desc {
390 	struct atl1e_rx_page   rx_page[AT_PAGE_NUM_PER_QUEUE];
391 	u8  rx_using;
392 	u16 rx_nxseq;
393 };
394 
395 /* transmit packet descriptor (tpd) ring */
396 struct atl1e_tx_ring {
397 	struct atl1e_tpd_desc *desc;  /* descriptor ring virtual address  */
398 	dma_addr_t	   dma;    /* descriptor ring physical address */
399 	u16       	   count;  /* the count of transmit rings  */
400 	rwlock_t	   tx_lock;
401 	u16		   next_to_use;
402 	atomic_t	   next_to_clean;
403 	struct atl1e_tx_buffer *tx_buffer;
404 	dma_addr_t	   cmb_dma;
405 	u32		   *cmb;
406 };
407 
408 /* receive packet descriptor ring */
409 struct atl1e_rx_ring {
410 	void        	*desc;
411 	dma_addr_t  	dma;
412 	int         	size;
413 	u32	    	page_size; /* bytes length of rxf page */
414 	u32		real_page_size; /* real_page_size = page_size + jumbo + aliagn */
415 	struct atl1e_rx_page_desc	rx_page_desc[AT_MAX_RECEIVE_QUEUE];
416 };
417 
418 /* board specific private data structure */
419 struct atl1e_adapter {
420 	struct net_device   *netdev;
421 	struct pci_dev      *pdev;
422 	struct napi_struct  napi;
423 	struct mii_if_info  mii;    /* MII interface info */
424 	struct atl1e_hw        hw;
425 	struct atl1e_hw_stats  hw_stats;
426 
427 	u32 wol;
428 	u16 link_speed;
429 	u16 link_duplex;
430 
431 	spinlock_t mdio_lock;
432 	atomic_t irq_sem;
433 
434 	struct work_struct reset_task;
435 	struct work_struct link_chg_task;
436 	struct timer_list watchdog_timer;
437 	struct timer_list phy_config_timer;
438 
439 	/* All Descriptor memory */
440 	dma_addr_t  	ring_dma;
441 	void     	*ring_vir_addr;
442 	u32             ring_size;
443 
444 	struct atl1e_tx_ring tx_ring;
445 	struct atl1e_rx_ring rx_ring;
446 	int num_rx_queues;
447 	unsigned long flags;
448 #define __AT_TESTING        0x0001
449 #define __AT_RESETTING      0x0002
450 #define __AT_DOWN           0x0003
451 
452 	u32 bd_number;     /* board number;*/
453 	u32 pci_state[16];
454 	u32 *config_space;
455 };
456 
457 #define AT_WRITE_REG(a, reg, value) ( \
458 		writel((value), ((a)->hw_addr + reg)))
459 
460 #define AT_WRITE_FLUSH(a) (\
461 		readl((a)->hw_addr))
462 
463 #define AT_READ_REG(a, reg) ( \
464 		readl((a)->hw_addr + reg))
465 
466 #define AT_WRITE_REGB(a, reg, value) (\
467 		writeb((value), ((a)->hw_addr + reg)))
468 
469 #define AT_READ_REGB(a, reg) (\
470 		readb((a)->hw_addr + reg))
471 
472 #define AT_WRITE_REGW(a, reg, value) (\
473 		writew((value), ((a)->hw_addr + reg)))
474 
475 #define AT_READ_REGW(a, reg) (\
476 		readw((a)->hw_addr + reg))
477 
478 #define AT_WRITE_REG_ARRAY(a, reg, offset, value) ( \
479 		writel((value), (((a)->hw_addr + reg) + ((offset) << 2))))
480 
481 #define AT_READ_REG_ARRAY(a, reg, offset) ( \
482 		readl(((a)->hw_addr + reg) + ((offset) << 2)))
483 
484 extern char atl1e_driver_name[];
485 
486 void atl1e_check_options(struct atl1e_adapter *adapter);
487 int atl1e_up(struct atl1e_adapter *adapter);
488 void atl1e_down(struct atl1e_adapter *adapter);
489 void atl1e_reinit_locked(struct atl1e_adapter *adapter);
490 s32 atl1e_reset_hw(struct atl1e_hw *hw);
491 void atl1e_set_ethtool_ops(struct net_device *netdev);
492 #endif /* _ATL1_E_H_ */
493