1 /*
2  * Copyright 2008-2015 Freescale Semiconductor Inc.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *     * Redistributions of source code must retain the above copyright
7  *       notice, this list of conditions and the following disclaimer.
8  *     * Redistributions in binary form must reproduce the above copyright
9  *       notice, this list of conditions and the following disclaimer in the
10  *       documentation and/or other materials provided with the distribution.
11  *     * Neither the name of Freescale Semiconductor nor the
12  *       names of its contributors may be used to endorse or promote products
13  *       derived from this software without specific prior written permission.
14  *
15  *
16  * ALTERNATIVELY, this software may be distributed under the terms of the
17  * GNU General Public License ("GPL") as published by the Free Software
18  * Foundation, either version 2 of that License or (at your option) any
19  * later version.
20  *
21  * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
22  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24  * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
28  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34 
35 #include "fman_tgec.h"
36 #include "fman.h"
37 
38 #include <linux/slab.h>
39 #include <linux/bitrev.h>
40 #include <linux/io.h>
41 #include <linux/crc32.h>
42 
43 /* Transmit Inter-Packet Gap Length Register (TX_IPG_LENGTH) */
44 #define TGEC_TX_IPG_LENGTH_MASK	0x000003ff
45 
46 /* Command and Configuration Register (COMMAND_CONFIG) */
47 #define CMD_CFG_EN_TIMESTAMP		0x00100000
48 #define CMD_CFG_NO_LEN_CHK		0x00020000
49 #define CMD_CFG_PAUSE_IGNORE		0x00000100
50 #define CMF_CFG_CRC_FWD			0x00000040
51 #define CMD_CFG_PROMIS_EN		0x00000010
52 #define CMD_CFG_RX_EN			0x00000002
53 #define CMD_CFG_TX_EN			0x00000001
54 
55 /* Interrupt Mask Register (IMASK) */
56 #define TGEC_IMASK_MDIO_SCAN_EVENT	0x00010000
57 #define TGEC_IMASK_MDIO_CMD_CMPL	0x00008000
58 #define TGEC_IMASK_REM_FAULT		0x00004000
59 #define TGEC_IMASK_LOC_FAULT		0x00002000
60 #define TGEC_IMASK_TX_ECC_ER		0x00001000
61 #define TGEC_IMASK_TX_FIFO_UNFL	0x00000800
62 #define TGEC_IMASK_TX_FIFO_OVFL	0x00000400
63 #define TGEC_IMASK_TX_ER		0x00000200
64 #define TGEC_IMASK_RX_FIFO_OVFL	0x00000100
65 #define TGEC_IMASK_RX_ECC_ER		0x00000080
66 #define TGEC_IMASK_RX_JAB_FRM		0x00000040
67 #define TGEC_IMASK_RX_OVRSZ_FRM	0x00000020
68 #define TGEC_IMASK_RX_RUNT_FRM		0x00000010
69 #define TGEC_IMASK_RX_FRAG_FRM		0x00000008
70 #define TGEC_IMASK_RX_LEN_ER		0x00000004
71 #define TGEC_IMASK_RX_CRC_ER		0x00000002
72 #define TGEC_IMASK_RX_ALIGN_ER		0x00000001
73 
74 /* Hashtable Control Register (HASHTABLE_CTRL) */
75 #define TGEC_HASH_MCAST_SHIFT		23
76 #define TGEC_HASH_MCAST_EN		0x00000200
77 #define TGEC_HASH_ADR_MSK		0x000001ff
78 
79 #define DEFAULT_TX_IPG_LENGTH			12
80 #define DEFAULT_MAX_FRAME_LENGTH		0x600
81 #define DEFAULT_PAUSE_QUANT			0xf000
82 
83 /* number of pattern match registers (entries) */
84 #define TGEC_NUM_OF_PADDRS          1
85 
86 /* Group address bit indication */
87 #define GROUP_ADDRESS               0x0000010000000000LL
88 
89 /* Hash table size (= 32 bits*8 regs) */
90 #define TGEC_HASH_TABLE_SIZE             512
91 
92 /* tGEC memory map */
93 struct tgec_regs {
94 	u32 tgec_id;		/* 0x000 Controller ID */
95 	u32 reserved001[1];	/* 0x004 */
96 	u32 command_config;	/* 0x008 Control and configuration */
97 	u32 mac_addr_0;		/* 0x00c Lower 32 bits of the MAC adr */
98 	u32 mac_addr_1;		/* 0x010 Upper 16 bits of the MAC adr */
99 	u32 maxfrm;		/* 0x014 Maximum frame length */
100 	u32 pause_quant;	/* 0x018 Pause quanta */
101 	u32 rx_fifo_sections;	/* 0x01c  */
102 	u32 tx_fifo_sections;	/* 0x020  */
103 	u32 rx_fifo_almost_f_e;	/* 0x024  */
104 	u32 tx_fifo_almost_f_e;	/* 0x028  */
105 	u32 hashtable_ctrl;	/* 0x02c Hash table control */
106 	u32 mdio_cfg_status;	/* 0x030  */
107 	u32 mdio_command;	/* 0x034  */
108 	u32 mdio_data;		/* 0x038  */
109 	u32 mdio_regaddr;	/* 0x03c  */
110 	u32 status;		/* 0x040  */
111 	u32 tx_ipg_len;		/* 0x044 Transmitter inter-packet-gap */
112 	u32 mac_addr_2;		/* 0x048 Lower 32 bits of 2nd MAC adr */
113 	u32 mac_addr_3;		/* 0x04c Upper 16 bits of 2nd MAC adr */
114 	u32 rx_fifo_ptr_rd;	/* 0x050  */
115 	u32 rx_fifo_ptr_wr;	/* 0x054  */
116 	u32 tx_fifo_ptr_rd;	/* 0x058  */
117 	u32 tx_fifo_ptr_wr;	/* 0x05c  */
118 	u32 imask;		/* 0x060 Interrupt mask */
119 	u32 ievent;		/* 0x064 Interrupt event */
120 	u32 udp_port;		/* 0x068 Defines a UDP Port number */
121 	u32 type_1588v2;	/* 0x06c Type field for 1588v2 */
122 	u32 reserved070[4];	/* 0x070 */
123 	/* 10Ge Statistics Counter */
124 	u32 tfrm_u;		/* 80 aFramesTransmittedOK */
125 	u32 tfrm_l;		/* 84 aFramesTransmittedOK */
126 	u32 rfrm_u;		/* 88 aFramesReceivedOK */
127 	u32 rfrm_l;		/* 8c aFramesReceivedOK */
128 	u32 rfcs_u;		/* 90 aFrameCheckSequenceErrors */
129 	u32 rfcs_l;		/* 94 aFrameCheckSequenceErrors */
130 	u32 raln_u;		/* 98 aAlignmentErrors */
131 	u32 raln_l;		/* 9c aAlignmentErrors */
132 	u32 txpf_u;		/* A0 aPAUSEMACCtrlFramesTransmitted */
133 	u32 txpf_l;		/* A4 aPAUSEMACCtrlFramesTransmitted */
134 	u32 rxpf_u;		/* A8 aPAUSEMACCtrlFramesReceived */
135 	u32 rxpf_l;		/* Ac aPAUSEMACCtrlFramesReceived */
136 	u32 rlong_u;		/* B0 aFrameTooLongErrors */
137 	u32 rlong_l;		/* B4 aFrameTooLongErrors */
138 	u32 rflr_u;		/* B8 aInRangeLengthErrors */
139 	u32 rflr_l;		/* Bc aInRangeLengthErrors */
140 	u32 tvlan_u;		/* C0 VLANTransmittedOK */
141 	u32 tvlan_l;		/* C4 VLANTransmittedOK */
142 	u32 rvlan_u;		/* C8 VLANReceivedOK */
143 	u32 rvlan_l;		/* Cc VLANReceivedOK */
144 	u32 toct_u;		/* D0 if_out_octets */
145 	u32 toct_l;		/* D4 if_out_octets */
146 	u32 roct_u;		/* D8 if_in_octets */
147 	u32 roct_l;		/* Dc if_in_octets */
148 	u32 ruca_u;		/* E0 if_in_ucast_pkts */
149 	u32 ruca_l;		/* E4 if_in_ucast_pkts */
150 	u32 rmca_u;		/* E8 ifInMulticastPkts */
151 	u32 rmca_l;		/* Ec ifInMulticastPkts */
152 	u32 rbca_u;		/* F0 ifInBroadcastPkts */
153 	u32 rbca_l;		/* F4 ifInBroadcastPkts */
154 	u32 terr_u;		/* F8 if_out_errors */
155 	u32 terr_l;		/* Fc if_out_errors */
156 	u32 reserved100[2];	/* 100-108 */
157 	u32 tuca_u;		/* 108 if_out_ucast_pkts */
158 	u32 tuca_l;		/* 10c if_out_ucast_pkts */
159 	u32 tmca_u;		/* 110 ifOutMulticastPkts */
160 	u32 tmca_l;		/* 114 ifOutMulticastPkts */
161 	u32 tbca_u;		/* 118 ifOutBroadcastPkts */
162 	u32 tbca_l;		/* 11c ifOutBroadcastPkts */
163 	u32 rdrp_u;		/* 120 etherStatsDropEvents */
164 	u32 rdrp_l;		/* 124 etherStatsDropEvents */
165 	u32 reoct_u;		/* 128 etherStatsOctets */
166 	u32 reoct_l;		/* 12c etherStatsOctets */
167 	u32 rpkt_u;		/* 130 etherStatsPkts */
168 	u32 rpkt_l;		/* 134 etherStatsPkts */
169 	u32 trund_u;		/* 138 etherStatsUndersizePkts */
170 	u32 trund_l;		/* 13c etherStatsUndersizePkts */
171 	u32 r64_u;		/* 140 etherStatsPkts64Octets */
172 	u32 r64_l;		/* 144 etherStatsPkts64Octets */
173 	u32 r127_u;		/* 148 etherStatsPkts65to127Octets */
174 	u32 r127_l;		/* 14c etherStatsPkts65to127Octets */
175 	u32 r255_u;		/* 150 etherStatsPkts128to255Octets */
176 	u32 r255_l;		/* 154 etherStatsPkts128to255Octets */
177 	u32 r511_u;		/* 158 etherStatsPkts256to511Octets */
178 	u32 r511_l;		/* 15c etherStatsPkts256to511Octets */
179 	u32 r1023_u;		/* 160 etherStatsPkts512to1023Octets */
180 	u32 r1023_l;		/* 164 etherStatsPkts512to1023Octets */
181 	u32 r1518_u;		/* 168 etherStatsPkts1024to1518Octets */
182 	u32 r1518_l;		/* 16c etherStatsPkts1024to1518Octets */
183 	u32 r1519x_u;		/* 170 etherStatsPkts1519toX */
184 	u32 r1519x_l;		/* 174 etherStatsPkts1519toX */
185 	u32 trovr_u;		/* 178 etherStatsOversizePkts */
186 	u32 trovr_l;		/* 17c etherStatsOversizePkts */
187 	u32 trjbr_u;		/* 180 etherStatsJabbers */
188 	u32 trjbr_l;		/* 184 etherStatsJabbers */
189 	u32 trfrg_u;		/* 188 etherStatsFragments */
190 	u32 trfrg_l;		/* 18C etherStatsFragments */
191 	u32 rerr_u;		/* 190 if_in_errors */
192 	u32 rerr_l;		/* 194 if_in_errors */
193 };
194 
195 struct tgec_cfg {
196 	bool pause_ignore;
197 	bool promiscuous_mode_enable;
198 	u16 max_frame_length;
199 	u16 pause_quant;
200 	u32 tx_ipg_length;
201 };
202 
203 struct fman_mac {
204 	/* Pointer to the memory mapped registers. */
205 	struct tgec_regs __iomem *regs;
206 	/* MAC address of device; */
207 	u64 addr;
208 	u16 max_speed;
209 	void *dev_id; /* device cookie used by the exception cbs */
210 	fman_mac_exception_cb *exception_cb;
211 	fman_mac_exception_cb *event_cb;
212 	/* pointer to driver's global address hash table  */
213 	struct eth_hash_t *multicast_addr_hash;
214 	/* pointer to driver's individual address hash table  */
215 	struct eth_hash_t *unicast_addr_hash;
216 	u8 mac_id;
217 	u32 exceptions;
218 	struct tgec_cfg *cfg;
219 	void *fm;
220 	struct fman_rev_info fm_rev_info;
221 	bool allmulti_enabled;
222 };
223 
224 static void set_mac_address(struct tgec_regs __iomem *regs, u8 *adr)
225 {
226 	u32 tmp0, tmp1;
227 
228 	tmp0 = (u32)(adr[0] | adr[1] << 8 | adr[2] << 16 | adr[3] << 24);
229 	tmp1 = (u32)(adr[4] | adr[5] << 8);
230 	iowrite32be(tmp0, &regs->mac_addr_0);
231 	iowrite32be(tmp1, &regs->mac_addr_1);
232 }
233 
234 static void set_dflts(struct tgec_cfg *cfg)
235 {
236 	cfg->promiscuous_mode_enable = false;
237 	cfg->pause_ignore = false;
238 	cfg->tx_ipg_length = DEFAULT_TX_IPG_LENGTH;
239 	cfg->max_frame_length = DEFAULT_MAX_FRAME_LENGTH;
240 	cfg->pause_quant = DEFAULT_PAUSE_QUANT;
241 }
242 
243 static int init(struct tgec_regs __iomem *regs, struct tgec_cfg *cfg,
244 		u32 exception_mask)
245 {
246 	u32 tmp;
247 
248 	/* Config */
249 	tmp = CMF_CFG_CRC_FWD;
250 	if (cfg->promiscuous_mode_enable)
251 		tmp |= CMD_CFG_PROMIS_EN;
252 	if (cfg->pause_ignore)
253 		tmp |= CMD_CFG_PAUSE_IGNORE;
254 	/* Payload length check disable */
255 	tmp |= CMD_CFG_NO_LEN_CHK;
256 	iowrite32be(tmp, &regs->command_config);
257 
258 	/* Max Frame Length */
259 	iowrite32be((u32)cfg->max_frame_length, &regs->maxfrm);
260 	/* Pause Time */
261 	iowrite32be(cfg->pause_quant, &regs->pause_quant);
262 
263 	/* clear all pending events and set-up interrupts */
264 	iowrite32be(0xffffffff, &regs->ievent);
265 	iowrite32be(ioread32be(&regs->imask) | exception_mask, &regs->imask);
266 
267 	return 0;
268 }
269 
270 static int check_init_parameters(struct fman_mac *tgec)
271 {
272 	if (tgec->max_speed < SPEED_10000) {
273 		pr_err("10G MAC driver only support 10G speed\n");
274 		return -EINVAL;
275 	}
276 	if (!tgec->exception_cb) {
277 		pr_err("uninitialized exception_cb\n");
278 		return -EINVAL;
279 	}
280 	if (!tgec->event_cb) {
281 		pr_err("uninitialized event_cb\n");
282 		return -EINVAL;
283 	}
284 
285 	return 0;
286 }
287 
288 static int get_exception_flag(enum fman_mac_exceptions exception)
289 {
290 	u32 bit_mask;
291 
292 	switch (exception) {
293 	case FM_MAC_EX_10G_MDIO_SCAN_EVENT:
294 		bit_mask = TGEC_IMASK_MDIO_SCAN_EVENT;
295 		break;
296 	case FM_MAC_EX_10G_MDIO_CMD_CMPL:
297 		bit_mask = TGEC_IMASK_MDIO_CMD_CMPL;
298 		break;
299 	case FM_MAC_EX_10G_REM_FAULT:
300 		bit_mask = TGEC_IMASK_REM_FAULT;
301 		break;
302 	case FM_MAC_EX_10G_LOC_FAULT:
303 		bit_mask = TGEC_IMASK_LOC_FAULT;
304 		break;
305 	case FM_MAC_EX_10G_TX_ECC_ER:
306 		bit_mask = TGEC_IMASK_TX_ECC_ER;
307 		break;
308 	case FM_MAC_EX_10G_TX_FIFO_UNFL:
309 		bit_mask = TGEC_IMASK_TX_FIFO_UNFL;
310 		break;
311 	case FM_MAC_EX_10G_TX_FIFO_OVFL:
312 		bit_mask = TGEC_IMASK_TX_FIFO_OVFL;
313 		break;
314 	case FM_MAC_EX_10G_TX_ER:
315 		bit_mask = TGEC_IMASK_TX_ER;
316 		break;
317 	case FM_MAC_EX_10G_RX_FIFO_OVFL:
318 		bit_mask = TGEC_IMASK_RX_FIFO_OVFL;
319 		break;
320 	case FM_MAC_EX_10G_RX_ECC_ER:
321 		bit_mask = TGEC_IMASK_RX_ECC_ER;
322 		break;
323 	case FM_MAC_EX_10G_RX_JAB_FRM:
324 		bit_mask = TGEC_IMASK_RX_JAB_FRM;
325 		break;
326 	case FM_MAC_EX_10G_RX_OVRSZ_FRM:
327 		bit_mask = TGEC_IMASK_RX_OVRSZ_FRM;
328 		break;
329 	case FM_MAC_EX_10G_RX_RUNT_FRM:
330 		bit_mask = TGEC_IMASK_RX_RUNT_FRM;
331 		break;
332 	case FM_MAC_EX_10G_RX_FRAG_FRM:
333 		bit_mask = TGEC_IMASK_RX_FRAG_FRM;
334 		break;
335 	case FM_MAC_EX_10G_RX_LEN_ER:
336 		bit_mask = TGEC_IMASK_RX_LEN_ER;
337 		break;
338 	case FM_MAC_EX_10G_RX_CRC_ER:
339 		bit_mask = TGEC_IMASK_RX_CRC_ER;
340 		break;
341 	case FM_MAC_EX_10G_RX_ALIGN_ER:
342 		bit_mask = TGEC_IMASK_RX_ALIGN_ER;
343 		break;
344 	default:
345 		bit_mask = 0;
346 		break;
347 	}
348 
349 	return bit_mask;
350 }
351 
352 static void tgec_err_exception(void *handle)
353 {
354 	struct fman_mac *tgec = (struct fman_mac *)handle;
355 	struct tgec_regs __iomem *regs = tgec->regs;
356 	u32 event;
357 
358 	/* do not handle MDIO events */
359 	event = ioread32be(&regs->ievent) &
360 			   ~(TGEC_IMASK_MDIO_SCAN_EVENT |
361 			   TGEC_IMASK_MDIO_CMD_CMPL);
362 
363 	event &= ioread32be(&regs->imask);
364 
365 	iowrite32be(event, &regs->ievent);
366 
367 	if (event & TGEC_IMASK_REM_FAULT)
368 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_REM_FAULT);
369 	if (event & TGEC_IMASK_LOC_FAULT)
370 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_LOC_FAULT);
371 	if (event & TGEC_IMASK_TX_ECC_ER)
372 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_TX_ECC_ER);
373 	if (event & TGEC_IMASK_TX_FIFO_UNFL)
374 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_TX_FIFO_UNFL);
375 	if (event & TGEC_IMASK_TX_FIFO_OVFL)
376 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_TX_FIFO_OVFL);
377 	if (event & TGEC_IMASK_TX_ER)
378 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_TX_ER);
379 	if (event & TGEC_IMASK_RX_FIFO_OVFL)
380 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_FIFO_OVFL);
381 	if (event & TGEC_IMASK_RX_ECC_ER)
382 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_ECC_ER);
383 	if (event & TGEC_IMASK_RX_JAB_FRM)
384 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_JAB_FRM);
385 	if (event & TGEC_IMASK_RX_OVRSZ_FRM)
386 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_OVRSZ_FRM);
387 	if (event & TGEC_IMASK_RX_RUNT_FRM)
388 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_RUNT_FRM);
389 	if (event & TGEC_IMASK_RX_FRAG_FRM)
390 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_FRAG_FRM);
391 	if (event & TGEC_IMASK_RX_LEN_ER)
392 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_LEN_ER);
393 	if (event & TGEC_IMASK_RX_CRC_ER)
394 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_CRC_ER);
395 	if (event & TGEC_IMASK_RX_ALIGN_ER)
396 		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_ALIGN_ER);
397 }
398 
399 static void free_init_resources(struct fman_mac *tgec)
400 {
401 	fman_unregister_intr(tgec->fm, FMAN_MOD_MAC, tgec->mac_id,
402 			     FMAN_INTR_TYPE_ERR);
403 
404 	/* release the driver's group hash table */
405 	free_hash_table(tgec->multicast_addr_hash);
406 	tgec->multicast_addr_hash = NULL;
407 
408 	/* release the driver's individual hash table */
409 	free_hash_table(tgec->unicast_addr_hash);
410 	tgec->unicast_addr_hash = NULL;
411 }
412 
413 static bool is_init_done(struct tgec_cfg *cfg)
414 {
415 	/* Checks if tGEC driver parameters were initialized */
416 	if (!cfg)
417 		return true;
418 
419 	return false;
420 }
421 
422 int tgec_enable(struct fman_mac *tgec, enum comm_mode mode)
423 {
424 	struct tgec_regs __iomem *regs = tgec->regs;
425 	u32 tmp;
426 
427 	if (!is_init_done(tgec->cfg))
428 		return -EINVAL;
429 
430 	tmp = ioread32be(&regs->command_config);
431 	if (mode & COMM_MODE_RX)
432 		tmp |= CMD_CFG_RX_EN;
433 	if (mode & COMM_MODE_TX)
434 		tmp |= CMD_CFG_TX_EN;
435 	iowrite32be(tmp, &regs->command_config);
436 
437 	return 0;
438 }
439 
440 int tgec_disable(struct fman_mac *tgec, enum comm_mode mode)
441 {
442 	struct tgec_regs __iomem *regs = tgec->regs;
443 	u32 tmp;
444 
445 	if (!is_init_done(tgec->cfg))
446 		return -EINVAL;
447 
448 	tmp = ioread32be(&regs->command_config);
449 	if (mode & COMM_MODE_RX)
450 		tmp &= ~CMD_CFG_RX_EN;
451 	if (mode & COMM_MODE_TX)
452 		tmp &= ~CMD_CFG_TX_EN;
453 	iowrite32be(tmp, &regs->command_config);
454 
455 	return 0;
456 }
457 
458 int tgec_set_promiscuous(struct fman_mac *tgec, bool new_val)
459 {
460 	struct tgec_regs __iomem *regs = tgec->regs;
461 	u32 tmp;
462 
463 	if (!is_init_done(tgec->cfg))
464 		return -EINVAL;
465 
466 	tmp = ioread32be(&regs->command_config);
467 	if (new_val)
468 		tmp |= CMD_CFG_PROMIS_EN;
469 	else
470 		tmp &= ~CMD_CFG_PROMIS_EN;
471 	iowrite32be(tmp, &regs->command_config);
472 
473 	return 0;
474 }
475 
476 int tgec_cfg_max_frame_len(struct fman_mac *tgec, u16 new_val)
477 {
478 	if (is_init_done(tgec->cfg))
479 		return -EINVAL;
480 
481 	tgec->cfg->max_frame_length = new_val;
482 
483 	return 0;
484 }
485 
486 int tgec_set_tx_pause_frames(struct fman_mac *tgec, u8 __maybe_unused priority,
487 			     u16 pause_time, u16 __maybe_unused thresh_time)
488 {
489 	struct tgec_regs __iomem *regs = tgec->regs;
490 
491 	if (!is_init_done(tgec->cfg))
492 		return -EINVAL;
493 
494 	iowrite32be((u32)pause_time, &regs->pause_quant);
495 
496 	return 0;
497 }
498 
499 int tgec_accept_rx_pause_frames(struct fman_mac *tgec, bool en)
500 {
501 	struct tgec_regs __iomem *regs = tgec->regs;
502 	u32 tmp;
503 
504 	if (!is_init_done(tgec->cfg))
505 		return -EINVAL;
506 
507 	tmp = ioread32be(&regs->command_config);
508 	if (!en)
509 		tmp |= CMD_CFG_PAUSE_IGNORE;
510 	else
511 		tmp &= ~CMD_CFG_PAUSE_IGNORE;
512 	iowrite32be(tmp, &regs->command_config);
513 
514 	return 0;
515 }
516 
517 int tgec_modify_mac_address(struct fman_mac *tgec, enet_addr_t *p_enet_addr)
518 {
519 	if (!is_init_done(tgec->cfg))
520 		return -EINVAL;
521 
522 	tgec->addr = ENET_ADDR_TO_UINT64(*p_enet_addr);
523 	set_mac_address(tgec->regs, (u8 *)(*p_enet_addr));
524 
525 	return 0;
526 }
527 
528 int tgec_add_hash_mac_address(struct fman_mac *tgec, enet_addr_t *eth_addr)
529 {
530 	struct tgec_regs __iomem *regs = tgec->regs;
531 	struct eth_hash_entry *hash_entry;
532 	u32 crc = 0xFFFFFFFF, hash;
533 	u64 addr;
534 
535 	if (!is_init_done(tgec->cfg))
536 		return -EINVAL;
537 
538 	addr = ENET_ADDR_TO_UINT64(*eth_addr);
539 
540 	if (!(addr & GROUP_ADDRESS)) {
541 		/* Unicast addresses not supported in hash */
542 		pr_err("Unicast Address\n");
543 		return -EINVAL;
544 	}
545 	/* CRC calculation */
546 	crc = crc32_le(crc, (u8 *)eth_addr, ETH_ALEN);
547 	crc = bitrev32(crc);
548 	/* Take 9 MSB bits */
549 	hash = (crc >> TGEC_HASH_MCAST_SHIFT) & TGEC_HASH_ADR_MSK;
550 
551 	/* Create element to be added to the driver hash table */
552 	hash_entry = kmalloc(sizeof(*hash_entry), GFP_ATOMIC);
553 	if (!hash_entry)
554 		return -ENOMEM;
555 	hash_entry->addr = addr;
556 	INIT_LIST_HEAD(&hash_entry->node);
557 
558 	list_add_tail(&hash_entry->node,
559 		      &tgec->multicast_addr_hash->lsts[hash]);
560 	iowrite32be((hash | TGEC_HASH_MCAST_EN), &regs->hashtable_ctrl);
561 
562 	return 0;
563 }
564 
565 int tgec_set_allmulti(struct fman_mac *tgec, bool enable)
566 {
567 	u32 entry;
568 	struct tgec_regs __iomem *regs = tgec->regs;
569 
570 	if (!is_init_done(tgec->cfg))
571 		return -EINVAL;
572 
573 	if (enable) {
574 		for (entry = 0; entry < TGEC_HASH_TABLE_SIZE; entry++)
575 			iowrite32be(entry | TGEC_HASH_MCAST_EN,
576 				    &regs->hashtable_ctrl);
577 	} else {
578 		for (entry = 0; entry < TGEC_HASH_TABLE_SIZE; entry++)
579 			iowrite32be(entry & ~TGEC_HASH_MCAST_EN,
580 				    &regs->hashtable_ctrl);
581 	}
582 
583 	tgec->allmulti_enabled = enable;
584 
585 	return 0;
586 }
587 
588 int tgec_set_tstamp(struct fman_mac *tgec, bool enable)
589 {
590 	struct tgec_regs __iomem *regs = tgec->regs;
591 	u32 tmp;
592 
593 	if (!is_init_done(tgec->cfg))
594 		return -EINVAL;
595 
596 	tmp = ioread32be(&regs->command_config);
597 
598 	if (enable)
599 		tmp |= CMD_CFG_EN_TIMESTAMP;
600 	else
601 		tmp &= ~CMD_CFG_EN_TIMESTAMP;
602 
603 	iowrite32be(tmp, &regs->command_config);
604 
605 	return 0;
606 }
607 
608 int tgec_del_hash_mac_address(struct fman_mac *tgec, enet_addr_t *eth_addr)
609 {
610 	struct tgec_regs __iomem *regs = tgec->regs;
611 	struct eth_hash_entry *hash_entry = NULL;
612 	struct list_head *pos;
613 	u32 crc = 0xFFFFFFFF, hash;
614 	u64 addr;
615 
616 	if (!is_init_done(tgec->cfg))
617 		return -EINVAL;
618 
619 	addr = ((*(u64 *)eth_addr) >> 16);
620 
621 	/* CRC calculation */
622 	crc = crc32_le(crc, (u8 *)eth_addr, ETH_ALEN);
623 	crc = bitrev32(crc);
624 	/* Take 9 MSB bits */
625 	hash = (crc >> TGEC_HASH_MCAST_SHIFT) & TGEC_HASH_ADR_MSK;
626 
627 	list_for_each(pos, &tgec->multicast_addr_hash->lsts[hash]) {
628 		hash_entry = ETH_HASH_ENTRY_OBJ(pos);
629 		if (hash_entry && hash_entry->addr == addr) {
630 			list_del_init(&hash_entry->node);
631 			kfree(hash_entry);
632 			break;
633 		}
634 	}
635 
636 	if (!tgec->allmulti_enabled) {
637 		if (list_empty(&tgec->multicast_addr_hash->lsts[hash]))
638 			iowrite32be((hash & ~TGEC_HASH_MCAST_EN),
639 				    &regs->hashtable_ctrl);
640 	}
641 
642 	return 0;
643 }
644 
645 int tgec_get_version(struct fman_mac *tgec, u32 *mac_version)
646 {
647 	struct tgec_regs __iomem *regs = tgec->regs;
648 
649 	if (!is_init_done(tgec->cfg))
650 		return -EINVAL;
651 
652 	*mac_version = ioread32be(&regs->tgec_id);
653 
654 	return 0;
655 }
656 
657 int tgec_set_exception(struct fman_mac *tgec,
658 		       enum fman_mac_exceptions exception, bool enable)
659 {
660 	struct tgec_regs __iomem *regs = tgec->regs;
661 	u32 bit_mask = 0;
662 
663 	if (!is_init_done(tgec->cfg))
664 		return -EINVAL;
665 
666 	bit_mask = get_exception_flag(exception);
667 	if (bit_mask) {
668 		if (enable)
669 			tgec->exceptions |= bit_mask;
670 		else
671 			tgec->exceptions &= ~bit_mask;
672 	} else {
673 		pr_err("Undefined exception\n");
674 		return -EINVAL;
675 	}
676 	if (enable)
677 		iowrite32be(ioread32be(&regs->imask) | bit_mask, &regs->imask);
678 	else
679 		iowrite32be(ioread32be(&regs->imask) & ~bit_mask, &regs->imask);
680 
681 	return 0;
682 }
683 
684 int tgec_init(struct fman_mac *tgec)
685 {
686 	struct tgec_cfg *cfg;
687 	enet_addr_t eth_addr;
688 	int err;
689 
690 	if (is_init_done(tgec->cfg))
691 		return -EINVAL;
692 
693 	if (DEFAULT_RESET_ON_INIT &&
694 	    (fman_reset_mac(tgec->fm, tgec->mac_id) != 0)) {
695 		pr_err("Can't reset MAC!\n");
696 		return -EINVAL;
697 	}
698 
699 	err = check_init_parameters(tgec);
700 	if (err)
701 		return err;
702 
703 	cfg = tgec->cfg;
704 
705 	if (tgec->addr) {
706 		MAKE_ENET_ADDR_FROM_UINT64(tgec->addr, eth_addr);
707 		set_mac_address(tgec->regs, (u8 *)eth_addr);
708 	}
709 
710 	/* interrupts */
711 	/* FM_10G_REM_N_LCL_FLT_EX_10GMAC_ERRATA_SW005 Errata workaround */
712 	if (tgec->fm_rev_info.major <= 2)
713 		tgec->exceptions &= ~(TGEC_IMASK_REM_FAULT |
714 				      TGEC_IMASK_LOC_FAULT);
715 
716 	err = init(tgec->regs, cfg, tgec->exceptions);
717 	if (err) {
718 		free_init_resources(tgec);
719 		pr_err("TGEC version doesn't support this i/f mode\n");
720 		return err;
721 	}
722 
723 	/* Max Frame Length */
724 	err = fman_set_mac_max_frame(tgec->fm, tgec->mac_id,
725 				     cfg->max_frame_length);
726 	if (err) {
727 		pr_err("Setting max frame length FAILED\n");
728 		free_init_resources(tgec);
729 		return -EINVAL;
730 	}
731 
732 	/* FM_TX_FIFO_CORRUPTION_ERRATA_10GMAC_A007 Errata workaround */
733 	if (tgec->fm_rev_info.major == 2) {
734 		struct tgec_regs __iomem *regs = tgec->regs;
735 		u32 tmp;
736 
737 		/* restore the default tx ipg Length */
738 		tmp = (ioread32be(&regs->tx_ipg_len) &
739 		       ~TGEC_TX_IPG_LENGTH_MASK) | 12;
740 
741 		iowrite32be(tmp, &regs->tx_ipg_len);
742 	}
743 
744 	tgec->multicast_addr_hash = alloc_hash_table(TGEC_HASH_TABLE_SIZE);
745 	if (!tgec->multicast_addr_hash) {
746 		free_init_resources(tgec);
747 		pr_err("allocation hash table is FAILED\n");
748 		return -ENOMEM;
749 	}
750 
751 	tgec->unicast_addr_hash = alloc_hash_table(TGEC_HASH_TABLE_SIZE);
752 	if (!tgec->unicast_addr_hash) {
753 		free_init_resources(tgec);
754 		pr_err("allocation hash table is FAILED\n");
755 		return -ENOMEM;
756 	}
757 
758 	fman_register_intr(tgec->fm, FMAN_MOD_MAC, tgec->mac_id,
759 			   FMAN_INTR_TYPE_ERR, tgec_err_exception, tgec);
760 
761 	kfree(cfg);
762 	tgec->cfg = NULL;
763 
764 	return 0;
765 }
766 
767 int tgec_free(struct fman_mac *tgec)
768 {
769 	free_init_resources(tgec);
770 
771 	kfree(tgec->cfg);
772 	kfree(tgec);
773 
774 	return 0;
775 }
776 
777 struct fman_mac *tgec_config(struct fman_mac_params *params)
778 {
779 	struct fman_mac *tgec;
780 	struct tgec_cfg *cfg;
781 	void __iomem *base_addr;
782 
783 	base_addr = params->base_addr;
784 	/* allocate memory for the UCC GETH data structure. */
785 	tgec = kzalloc(sizeof(*tgec), GFP_KERNEL);
786 	if (!tgec)
787 		return NULL;
788 
789 	/* allocate memory for the 10G MAC driver parameters data structure. */
790 	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
791 	if (!cfg) {
792 		tgec_free(tgec);
793 		return NULL;
794 	}
795 
796 	/* Plant parameter structure pointer */
797 	tgec->cfg = cfg;
798 
799 	set_dflts(cfg);
800 
801 	tgec->regs = base_addr;
802 	tgec->addr = ENET_ADDR_TO_UINT64(params->addr);
803 	tgec->max_speed = params->max_speed;
804 	tgec->mac_id = params->mac_id;
805 	tgec->exceptions = (TGEC_IMASK_MDIO_SCAN_EVENT	|
806 			    TGEC_IMASK_REM_FAULT	|
807 			    TGEC_IMASK_LOC_FAULT	|
808 			    TGEC_IMASK_TX_ECC_ER	|
809 			    TGEC_IMASK_TX_FIFO_UNFL	|
810 			    TGEC_IMASK_TX_FIFO_OVFL	|
811 			    TGEC_IMASK_TX_ER		|
812 			    TGEC_IMASK_RX_FIFO_OVFL	|
813 			    TGEC_IMASK_RX_ECC_ER	|
814 			    TGEC_IMASK_RX_JAB_FRM	|
815 			    TGEC_IMASK_RX_OVRSZ_FRM	|
816 			    TGEC_IMASK_RX_RUNT_FRM	|
817 			    TGEC_IMASK_RX_FRAG_FRM	|
818 			    TGEC_IMASK_RX_CRC_ER	|
819 			    TGEC_IMASK_RX_ALIGN_ER);
820 	tgec->exception_cb = params->exception_cb;
821 	tgec->event_cb = params->event_cb;
822 	tgec->dev_id = params->dev_id;
823 	tgec->fm = params->fm;
824 
825 	/* Save FMan revision */
826 	fman_get_revision(tgec->fm, &tgec->fm_rev_info);
827 
828 	return tgec;
829 }
830