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c5aff182 TP |
1 | /* |
2 | * Driver for Marvell NETA network card for Armada XP and Armada 370 SoCs. | |
3 | * | |
4 | * Copyright (C) 2012 Marvell | |
5 | * | |
6 | * Rami Rosen <rosenr@marvell.com> | |
7 | * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | |
8 | * | |
9 | * This file is licensed under the terms of the GNU General Public | |
10 | * License version 2. This program is licensed "as is" without any | |
11 | * warranty of any kind, whether express or implied. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
c5aff182 TP |
15 | #include <linux/netdevice.h> |
16 | #include <linux/etherdevice.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/inetdevice.h> | |
20 | #include <linux/mbus.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/interrupt.h> | |
2d39d120 | 23 | #include <linux/if_vlan.h> |
c5aff182 TP |
24 | #include <net/ip.h> |
25 | #include <net/ipv6.h> | |
c3f0dd38 | 26 | #include <linux/io.h> |
2adb719d | 27 | #include <net/tso.h> |
c5aff182 TP |
28 | #include <linux/of.h> |
29 | #include <linux/of_irq.h> | |
30 | #include <linux/of_mdio.h> | |
31 | #include <linux/of_net.h> | |
32 | #include <linux/of_address.h> | |
33 | #include <linux/phy.h> | |
189dd626 | 34 | #include <linux/clk.h> |
f8642885 | 35 | #include <linux/cpu.h> |
c5aff182 TP |
36 | |
37 | /* Registers */ | |
38 | #define MVNETA_RXQ_CONFIG_REG(q) (0x1400 + ((q) << 2)) | |
39 | #define MVNETA_RXQ_HW_BUF_ALLOC BIT(1) | |
40 | #define MVNETA_RXQ_PKT_OFFSET_ALL_MASK (0xf << 8) | |
41 | #define MVNETA_RXQ_PKT_OFFSET_MASK(offs) ((offs) << 8) | |
42 | #define MVNETA_RXQ_THRESHOLD_REG(q) (0x14c0 + ((q) << 2)) | |
43 | #define MVNETA_RXQ_NON_OCCUPIED(v) ((v) << 16) | |
44 | #define MVNETA_RXQ_BASE_ADDR_REG(q) (0x1480 + ((q) << 2)) | |
45 | #define MVNETA_RXQ_SIZE_REG(q) (0x14a0 + ((q) << 2)) | |
46 | #define MVNETA_RXQ_BUF_SIZE_SHIFT 19 | |
47 | #define MVNETA_RXQ_BUF_SIZE_MASK (0x1fff << 19) | |
48 | #define MVNETA_RXQ_STATUS_REG(q) (0x14e0 + ((q) << 2)) | |
49 | #define MVNETA_RXQ_OCCUPIED_ALL_MASK 0x3fff | |
50 | #define MVNETA_RXQ_STATUS_UPDATE_REG(q) (0x1500 + ((q) << 2)) | |
51 | #define MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT 16 | |
52 | #define MVNETA_RXQ_ADD_NON_OCCUPIED_MAX 255 | |
53 | #define MVNETA_PORT_RX_RESET 0x1cc0 | |
54 | #define MVNETA_PORT_RX_DMA_RESET BIT(0) | |
55 | #define MVNETA_PHY_ADDR 0x2000 | |
56 | #define MVNETA_PHY_ADDR_MASK 0x1f | |
57 | #define MVNETA_MBUS_RETRY 0x2010 | |
58 | #define MVNETA_UNIT_INTR_CAUSE 0x2080 | |
59 | #define MVNETA_UNIT_CONTROL 0x20B0 | |
60 | #define MVNETA_PHY_POLLING_ENABLE BIT(1) | |
61 | #define MVNETA_WIN_BASE(w) (0x2200 + ((w) << 3)) | |
62 | #define MVNETA_WIN_SIZE(w) (0x2204 + ((w) << 3)) | |
63 | #define MVNETA_WIN_REMAP(w) (0x2280 + ((w) << 2)) | |
64 | #define MVNETA_BASE_ADDR_ENABLE 0x2290 | |
65 | #define MVNETA_PORT_CONFIG 0x2400 | |
66 | #define MVNETA_UNI_PROMISC_MODE BIT(0) | |
67 | #define MVNETA_DEF_RXQ(q) ((q) << 1) | |
68 | #define MVNETA_DEF_RXQ_ARP(q) ((q) << 4) | |
69 | #define MVNETA_TX_UNSET_ERR_SUM BIT(12) | |
70 | #define MVNETA_DEF_RXQ_TCP(q) ((q) << 16) | |
71 | #define MVNETA_DEF_RXQ_UDP(q) ((q) << 19) | |
72 | #define MVNETA_DEF_RXQ_BPDU(q) ((q) << 22) | |
73 | #define MVNETA_RX_CSUM_WITH_PSEUDO_HDR BIT(25) | |
74 | #define MVNETA_PORT_CONFIG_DEFL_VALUE(q) (MVNETA_DEF_RXQ(q) | \ | |
75 | MVNETA_DEF_RXQ_ARP(q) | \ | |
76 | MVNETA_DEF_RXQ_TCP(q) | \ | |
77 | MVNETA_DEF_RXQ_UDP(q) | \ | |
78 | MVNETA_DEF_RXQ_BPDU(q) | \ | |
79 | MVNETA_TX_UNSET_ERR_SUM | \ | |
80 | MVNETA_RX_CSUM_WITH_PSEUDO_HDR) | |
81 | #define MVNETA_PORT_CONFIG_EXTEND 0x2404 | |
82 | #define MVNETA_MAC_ADDR_LOW 0x2414 | |
83 | #define MVNETA_MAC_ADDR_HIGH 0x2418 | |
84 | #define MVNETA_SDMA_CONFIG 0x241c | |
85 | #define MVNETA_SDMA_BRST_SIZE_16 4 | |
c5aff182 TP |
86 | #define MVNETA_RX_BRST_SZ_MASK(burst) ((burst) << 1) |
87 | #define MVNETA_RX_NO_DATA_SWAP BIT(4) | |
88 | #define MVNETA_TX_NO_DATA_SWAP BIT(5) | |
9ad8fef6 | 89 | #define MVNETA_DESC_SWAP BIT(6) |
c5aff182 TP |
90 | #define MVNETA_TX_BRST_SZ_MASK(burst) ((burst) << 22) |
91 | #define MVNETA_PORT_STATUS 0x2444 | |
92 | #define MVNETA_TX_IN_PRGRS BIT(1) | |
93 | #define MVNETA_TX_FIFO_EMPTY BIT(8) | |
94 | #define MVNETA_RX_MIN_FRAME_SIZE 0x247c | |
3f1dd4bc | 95 | #define MVNETA_SERDES_CFG 0x24A0 |
5445eaf3 | 96 | #define MVNETA_SGMII_SERDES_PROTO 0x0cc7 |
3f1dd4bc | 97 | #define MVNETA_QSGMII_SERDES_PROTO 0x0667 |
c5aff182 TP |
98 | #define MVNETA_TYPE_PRIO 0x24bc |
99 | #define MVNETA_FORCE_UNI BIT(21) | |
100 | #define MVNETA_TXQ_CMD_1 0x24e4 | |
101 | #define MVNETA_TXQ_CMD 0x2448 | |
102 | #define MVNETA_TXQ_DISABLE_SHIFT 8 | |
103 | #define MVNETA_TXQ_ENABLE_MASK 0x000000ff | |
e483911f AL |
104 | #define MVNETA_RX_DISCARD_FRAME_COUNT 0x2484 |
105 | #define MVNETA_OVERRUN_FRAME_COUNT 0x2488 | |
898b2970 SS |
106 | #define MVNETA_GMAC_CLOCK_DIVIDER 0x24f4 |
107 | #define MVNETA_GMAC_1MS_CLOCK_ENABLE BIT(31) | |
c5aff182 TP |
108 | #define MVNETA_ACC_MODE 0x2500 |
109 | #define MVNETA_CPU_MAP(cpu) (0x2540 + ((cpu) << 2)) | |
110 | #define MVNETA_CPU_RXQ_ACCESS_ALL_MASK 0x000000ff | |
111 | #define MVNETA_CPU_TXQ_ACCESS_ALL_MASK 0x0000ff00 | |
112 | #define MVNETA_RXQ_TIME_COAL_REG(q) (0x2580 + ((q) << 2)) | |
40ba35e7 | 113 | |
114 | /* Exception Interrupt Port/Queue Cause register */ | |
115 | ||
c5aff182 | 116 | #define MVNETA_INTR_NEW_CAUSE 0x25a0 |
c5aff182 | 117 | #define MVNETA_INTR_NEW_MASK 0x25a4 |
40ba35e7 | 118 | |
119 | /* bits 0..7 = TXQ SENT, one bit per queue. | |
120 | * bits 8..15 = RXQ OCCUP, one bit per queue. | |
121 | * bits 16..23 = RXQ FREE, one bit per queue. | |
122 | * bit 29 = OLD_REG_SUM, see old reg ? | |
123 | * bit 30 = TX_ERR_SUM, one bit for 4 ports | |
124 | * bit 31 = MISC_SUM, one bit for 4 ports | |
125 | */ | |
126 | #define MVNETA_TX_INTR_MASK(nr_txqs) (((1 << nr_txqs) - 1) << 0) | |
127 | #define MVNETA_TX_INTR_MASK_ALL (0xff << 0) | |
128 | #define MVNETA_RX_INTR_MASK(nr_rxqs) (((1 << nr_rxqs) - 1) << 8) | |
129 | #define MVNETA_RX_INTR_MASK_ALL (0xff << 8) | |
898b2970 | 130 | #define MVNETA_MISCINTR_INTR_MASK BIT(31) |
40ba35e7 | 131 | |
c5aff182 TP |
132 | #define MVNETA_INTR_OLD_CAUSE 0x25a8 |
133 | #define MVNETA_INTR_OLD_MASK 0x25ac | |
40ba35e7 | 134 | |
135 | /* Data Path Port/Queue Cause Register */ | |
c5aff182 TP |
136 | #define MVNETA_INTR_MISC_CAUSE 0x25b0 |
137 | #define MVNETA_INTR_MISC_MASK 0x25b4 | |
40ba35e7 | 138 | |
139 | #define MVNETA_CAUSE_PHY_STATUS_CHANGE BIT(0) | |
140 | #define MVNETA_CAUSE_LINK_CHANGE BIT(1) | |
141 | #define MVNETA_CAUSE_PTP BIT(4) | |
142 | ||
143 | #define MVNETA_CAUSE_INTERNAL_ADDR_ERR BIT(7) | |
144 | #define MVNETA_CAUSE_RX_OVERRUN BIT(8) | |
145 | #define MVNETA_CAUSE_RX_CRC_ERROR BIT(9) | |
146 | #define MVNETA_CAUSE_RX_LARGE_PKT BIT(10) | |
147 | #define MVNETA_CAUSE_TX_UNDERUN BIT(11) | |
148 | #define MVNETA_CAUSE_PRBS_ERR BIT(12) | |
149 | #define MVNETA_CAUSE_PSC_SYNC_CHANGE BIT(13) | |
150 | #define MVNETA_CAUSE_SERDES_SYNC_ERR BIT(14) | |
151 | ||
152 | #define MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT 16 | |
153 | #define MVNETA_CAUSE_BMU_ALLOC_ERR_ALL_MASK (0xF << MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT) | |
154 | #define MVNETA_CAUSE_BMU_ALLOC_ERR_MASK(pool) (1 << (MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT + (pool))) | |
155 | ||
156 | #define MVNETA_CAUSE_TXQ_ERROR_SHIFT 24 | |
157 | #define MVNETA_CAUSE_TXQ_ERROR_ALL_MASK (0xFF << MVNETA_CAUSE_TXQ_ERROR_SHIFT) | |
158 | #define MVNETA_CAUSE_TXQ_ERROR_MASK(q) (1 << (MVNETA_CAUSE_TXQ_ERROR_SHIFT + (q))) | |
159 | ||
c5aff182 TP |
160 | #define MVNETA_INTR_ENABLE 0x25b8 |
161 | #define MVNETA_TXQ_INTR_ENABLE_ALL_MASK 0x0000ff00 | |
40ba35e7 | 162 | #define MVNETA_RXQ_INTR_ENABLE_ALL_MASK 0xff000000 // note: neta says it's 0x000000FF |
163 | ||
c5aff182 TP |
164 | #define MVNETA_RXQ_CMD 0x2680 |
165 | #define MVNETA_RXQ_DISABLE_SHIFT 8 | |
166 | #define MVNETA_RXQ_ENABLE_MASK 0x000000ff | |
167 | #define MVETH_TXQ_TOKEN_COUNT_REG(q) (0x2700 + ((q) << 4)) | |
168 | #define MVETH_TXQ_TOKEN_CFG_REG(q) (0x2704 + ((q) << 4)) | |
169 | #define MVNETA_GMAC_CTRL_0 0x2c00 | |
170 | #define MVNETA_GMAC_MAX_RX_SIZE_SHIFT 2 | |
171 | #define MVNETA_GMAC_MAX_RX_SIZE_MASK 0x7ffc | |
172 | #define MVNETA_GMAC0_PORT_ENABLE BIT(0) | |
173 | #define MVNETA_GMAC_CTRL_2 0x2c08 | |
898b2970 | 174 | #define MVNETA_GMAC2_INBAND_AN_ENABLE BIT(0) |
a79121d3 | 175 | #define MVNETA_GMAC2_PCS_ENABLE BIT(3) |
c5aff182 TP |
176 | #define MVNETA_GMAC2_PORT_RGMII BIT(4) |
177 | #define MVNETA_GMAC2_PORT_RESET BIT(6) | |
178 | #define MVNETA_GMAC_STATUS 0x2c10 | |
179 | #define MVNETA_GMAC_LINK_UP BIT(0) | |
180 | #define MVNETA_GMAC_SPEED_1000 BIT(1) | |
181 | #define MVNETA_GMAC_SPEED_100 BIT(2) | |
182 | #define MVNETA_GMAC_FULL_DUPLEX BIT(3) | |
183 | #define MVNETA_GMAC_RX_FLOW_CTRL_ENABLE BIT(4) | |
184 | #define MVNETA_GMAC_TX_FLOW_CTRL_ENABLE BIT(5) | |
185 | #define MVNETA_GMAC_RX_FLOW_CTRL_ACTIVE BIT(6) | |
186 | #define MVNETA_GMAC_TX_FLOW_CTRL_ACTIVE BIT(7) | |
187 | #define MVNETA_GMAC_AUTONEG_CONFIG 0x2c0c | |
188 | #define MVNETA_GMAC_FORCE_LINK_DOWN BIT(0) | |
189 | #define MVNETA_GMAC_FORCE_LINK_PASS BIT(1) | |
898b2970 | 190 | #define MVNETA_GMAC_INBAND_AN_ENABLE BIT(2) |
c5aff182 TP |
191 | #define MVNETA_GMAC_CONFIG_MII_SPEED BIT(5) |
192 | #define MVNETA_GMAC_CONFIG_GMII_SPEED BIT(6) | |
71408602 | 193 | #define MVNETA_GMAC_AN_SPEED_EN BIT(7) |
898b2970 | 194 | #define MVNETA_GMAC_AN_FLOW_CTRL_EN BIT(11) |
c5aff182 | 195 | #define MVNETA_GMAC_CONFIG_FULL_DUPLEX BIT(12) |
71408602 | 196 | #define MVNETA_GMAC_AN_DUPLEX_EN BIT(13) |
e483911f | 197 | #define MVNETA_MIB_COUNTERS_BASE 0x3000 |
c5aff182 TP |
198 | #define MVNETA_MIB_LATE_COLLISION 0x7c |
199 | #define MVNETA_DA_FILT_SPEC_MCAST 0x3400 | |
200 | #define MVNETA_DA_FILT_OTH_MCAST 0x3500 | |
201 | #define MVNETA_DA_FILT_UCAST_BASE 0x3600 | |
202 | #define MVNETA_TXQ_BASE_ADDR_REG(q) (0x3c00 + ((q) << 2)) | |
203 | #define MVNETA_TXQ_SIZE_REG(q) (0x3c20 + ((q) << 2)) | |
204 | #define MVNETA_TXQ_SENT_THRESH_ALL_MASK 0x3fff0000 | |
205 | #define MVNETA_TXQ_SENT_THRESH_MASK(coal) ((coal) << 16) | |
206 | #define MVNETA_TXQ_UPDATE_REG(q) (0x3c60 + ((q) << 2)) | |
207 | #define MVNETA_TXQ_DEC_SENT_SHIFT 16 | |
208 | #define MVNETA_TXQ_STATUS_REG(q) (0x3c40 + ((q) << 2)) | |
209 | #define MVNETA_TXQ_SENT_DESC_SHIFT 16 | |
210 | #define MVNETA_TXQ_SENT_DESC_MASK 0x3fff0000 | |
211 | #define MVNETA_PORT_TX_RESET 0x3cf0 | |
212 | #define MVNETA_PORT_TX_DMA_RESET BIT(0) | |
213 | #define MVNETA_TX_MTU 0x3e0c | |
214 | #define MVNETA_TX_TOKEN_SIZE 0x3e14 | |
215 | #define MVNETA_TX_TOKEN_SIZE_MAX 0xffffffff | |
216 | #define MVNETA_TXQ_TOKEN_SIZE_REG(q) (0x3e40 + ((q) << 2)) | |
217 | #define MVNETA_TXQ_TOKEN_SIZE_MAX 0x7fffffff | |
218 | ||
219 | #define MVNETA_CAUSE_TXQ_SENT_DESC_ALL_MASK 0xff | |
220 | ||
221 | /* Descriptor ring Macros */ | |
222 | #define MVNETA_QUEUE_NEXT_DESC(q, index) \ | |
223 | (((index) < (q)->last_desc) ? ((index) + 1) : 0) | |
224 | ||
225 | /* Various constants */ | |
226 | ||
227 | /* Coalescing */ | |
aebea2ba | 228 | #define MVNETA_TXDONE_COAL_PKTS 1 |
c5aff182 TP |
229 | #define MVNETA_RX_COAL_PKTS 32 |
230 | #define MVNETA_RX_COAL_USEC 100 | |
231 | ||
6a20c175 | 232 | /* The two bytes Marvell header. Either contains a special value used |
c5aff182 TP |
233 | * by Marvell switches when a specific hardware mode is enabled (not |
234 | * supported by this driver) or is filled automatically by zeroes on | |
235 | * the RX side. Those two bytes being at the front of the Ethernet | |
236 | * header, they allow to have the IP header aligned on a 4 bytes | |
237 | * boundary automatically: the hardware skips those two bytes on its | |
238 | * own. | |
239 | */ | |
240 | #define MVNETA_MH_SIZE 2 | |
241 | ||
242 | #define MVNETA_VLAN_TAG_LEN 4 | |
243 | ||
244 | #define MVNETA_CPU_D_CACHE_LINE_SIZE 32 | |
245 | #define MVNETA_TX_CSUM_MAX_SIZE 9800 | |
246 | #define MVNETA_ACC_MODE_EXT 1 | |
247 | ||
248 | /* Timeout constants */ | |
249 | #define MVNETA_TX_DISABLE_TIMEOUT_MSEC 1000 | |
250 | #define MVNETA_RX_DISABLE_TIMEOUT_MSEC 1000 | |
251 | #define MVNETA_TX_FIFO_EMPTY_TIMEOUT 10000 | |
252 | ||
253 | #define MVNETA_TX_MTU_MAX 0x3ffff | |
254 | ||
2adb719d EG |
255 | /* TSO header size */ |
256 | #define TSO_HEADER_SIZE 128 | |
257 | ||
c5aff182 TP |
258 | /* Max number of Rx descriptors */ |
259 | #define MVNETA_MAX_RXD 128 | |
260 | ||
261 | /* Max number of Tx descriptors */ | |
262 | #define MVNETA_MAX_TXD 532 | |
263 | ||
8eef5f97 EG |
264 | /* Max number of allowed TCP segments for software TSO */ |
265 | #define MVNETA_MAX_TSO_SEGS 100 | |
266 | ||
267 | #define MVNETA_MAX_SKB_DESCS (MVNETA_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS) | |
268 | ||
c5aff182 TP |
269 | /* descriptor aligned size */ |
270 | #define MVNETA_DESC_ALIGNED_SIZE 32 | |
271 | ||
272 | #define MVNETA_RX_PKT_SIZE(mtu) \ | |
273 | ALIGN((mtu) + MVNETA_MH_SIZE + MVNETA_VLAN_TAG_LEN + \ | |
274 | ETH_HLEN + ETH_FCS_LEN, \ | |
275 | MVNETA_CPU_D_CACHE_LINE_SIZE) | |
276 | ||
2e3173a3 EG |
277 | #define IS_TSO_HEADER(txq, addr) \ |
278 | ((addr >= txq->tso_hdrs_phys) && \ | |
279 | (addr < txq->tso_hdrs_phys + txq->size * TSO_HEADER_SIZE)) | |
280 | ||
c5aff182 TP |
281 | #define MVNETA_RX_BUF_SIZE(pkt_size) ((pkt_size) + NET_SKB_PAD) |
282 | ||
9b0cdefa RK |
283 | struct mvneta_statistic { |
284 | unsigned short offset; | |
285 | unsigned short type; | |
286 | const char name[ETH_GSTRING_LEN]; | |
287 | }; | |
288 | ||
289 | #define T_REG_32 32 | |
290 | #define T_REG_64 64 | |
291 | ||
292 | static const struct mvneta_statistic mvneta_statistics[] = { | |
293 | { 0x3000, T_REG_64, "good_octets_received", }, | |
294 | { 0x3010, T_REG_32, "good_frames_received", }, | |
295 | { 0x3008, T_REG_32, "bad_octets_received", }, | |
296 | { 0x3014, T_REG_32, "bad_frames_received", }, | |
297 | { 0x3018, T_REG_32, "broadcast_frames_received", }, | |
298 | { 0x301c, T_REG_32, "multicast_frames_received", }, | |
299 | { 0x3050, T_REG_32, "unrec_mac_control_received", }, | |
300 | { 0x3058, T_REG_32, "good_fc_received", }, | |
301 | { 0x305c, T_REG_32, "bad_fc_received", }, | |
302 | { 0x3060, T_REG_32, "undersize_received", }, | |
303 | { 0x3064, T_REG_32, "fragments_received", }, | |
304 | { 0x3068, T_REG_32, "oversize_received", }, | |
305 | { 0x306c, T_REG_32, "jabber_received", }, | |
306 | { 0x3070, T_REG_32, "mac_receive_error", }, | |
307 | { 0x3074, T_REG_32, "bad_crc_event", }, | |
308 | { 0x3078, T_REG_32, "collision", }, | |
309 | { 0x307c, T_REG_32, "late_collision", }, | |
310 | { 0x2484, T_REG_32, "rx_discard", }, | |
311 | { 0x2488, T_REG_32, "rx_overrun", }, | |
312 | { 0x3020, T_REG_32, "frames_64_octets", }, | |
313 | { 0x3024, T_REG_32, "frames_65_to_127_octets", }, | |
314 | { 0x3028, T_REG_32, "frames_128_to_255_octets", }, | |
315 | { 0x302c, T_REG_32, "frames_256_to_511_octets", }, | |
316 | { 0x3030, T_REG_32, "frames_512_to_1023_octets", }, | |
317 | { 0x3034, T_REG_32, "frames_1024_to_max_octets", }, | |
318 | { 0x3038, T_REG_64, "good_octets_sent", }, | |
319 | { 0x3040, T_REG_32, "good_frames_sent", }, | |
320 | { 0x3044, T_REG_32, "excessive_collision", }, | |
321 | { 0x3048, T_REG_32, "multicast_frames_sent", }, | |
322 | { 0x304c, T_REG_32, "broadcast_frames_sent", }, | |
323 | { 0x3054, T_REG_32, "fc_sent", }, | |
324 | { 0x300c, T_REG_32, "internal_mac_transmit_err", }, | |
325 | }; | |
326 | ||
74c41b04 | 327 | struct mvneta_pcpu_stats { |
c5aff182 | 328 | struct u64_stats_sync syncp; |
74c41b04 | 329 | u64 rx_packets; |
330 | u64 rx_bytes; | |
331 | u64 tx_packets; | |
332 | u64 tx_bytes; | |
c5aff182 TP |
333 | }; |
334 | ||
12bb03b4 MR |
335 | struct mvneta_pcpu_port { |
336 | /* Pointer to the shared port */ | |
337 | struct mvneta_port *pp; | |
338 | ||
339 | /* Pointer to the CPU-local NAPI struct */ | |
340 | struct napi_struct napi; | |
341 | ||
342 | /* Cause of the previous interrupt */ | |
343 | u32 cause_rx_tx; | |
344 | }; | |
345 | ||
c5aff182 | 346 | struct mvneta_port { |
12bb03b4 MR |
347 | struct mvneta_pcpu_port __percpu *ports; |
348 | struct mvneta_pcpu_stats __percpu *stats; | |
349 | ||
c5aff182 | 350 | int pkt_size; |
8ec2cd48 | 351 | unsigned int frag_size; |
c5aff182 TP |
352 | void __iomem *base; |
353 | struct mvneta_rx_queue *rxqs; | |
354 | struct mvneta_tx_queue *txqs; | |
c5aff182 | 355 | struct net_device *dev; |
f8642885 | 356 | struct notifier_block cpu_notifier; |
c5aff182 | 357 | |
c5aff182 | 358 | /* Core clock */ |
189dd626 | 359 | struct clk *clk; |
c5aff182 TP |
360 | u8 mcast_count[256]; |
361 | u16 tx_ring_size; | |
362 | u16 rx_ring_size; | |
c5aff182 TP |
363 | |
364 | struct mii_bus *mii_bus; | |
365 | struct phy_device *phy_dev; | |
366 | phy_interface_t phy_interface; | |
367 | struct device_node *phy_node; | |
368 | unsigned int link; | |
369 | unsigned int duplex; | |
370 | unsigned int speed; | |
b65657fc | 371 | unsigned int tx_csum_limit; |
898b2970 | 372 | int use_inband_status:1; |
9b0cdefa RK |
373 | |
374 | u64 ethtool_stats[ARRAY_SIZE(mvneta_statistics)]; | |
c5aff182 TP |
375 | }; |
376 | ||
6a20c175 | 377 | /* The mvneta_tx_desc and mvneta_rx_desc structures describe the |
c5aff182 TP |
378 | * layout of the transmit and reception DMA descriptors, and their |
379 | * layout is therefore defined by the hardware design | |
380 | */ | |
6083ed44 | 381 | |
c5aff182 TP |
382 | #define MVNETA_TX_L3_OFF_SHIFT 0 |
383 | #define MVNETA_TX_IP_HLEN_SHIFT 8 | |
384 | #define MVNETA_TX_L4_UDP BIT(16) | |
385 | #define MVNETA_TX_L3_IP6 BIT(17) | |
386 | #define MVNETA_TXD_IP_CSUM BIT(18) | |
387 | #define MVNETA_TXD_Z_PAD BIT(19) | |
388 | #define MVNETA_TXD_L_DESC BIT(20) | |
389 | #define MVNETA_TXD_F_DESC BIT(21) | |
390 | #define MVNETA_TXD_FLZ_DESC (MVNETA_TXD_Z_PAD | \ | |
391 | MVNETA_TXD_L_DESC | \ | |
392 | MVNETA_TXD_F_DESC) | |
393 | #define MVNETA_TX_L4_CSUM_FULL BIT(30) | |
394 | #define MVNETA_TX_L4_CSUM_NOT BIT(31) | |
395 | ||
c5aff182 TP |
396 | #define MVNETA_RXD_ERR_CRC 0x0 |
397 | #define MVNETA_RXD_ERR_SUMMARY BIT(16) | |
398 | #define MVNETA_RXD_ERR_OVERRUN BIT(17) | |
399 | #define MVNETA_RXD_ERR_LEN BIT(18) | |
400 | #define MVNETA_RXD_ERR_RESOURCE (BIT(17) | BIT(18)) | |
401 | #define MVNETA_RXD_ERR_CODE_MASK (BIT(17) | BIT(18)) | |
402 | #define MVNETA_RXD_L3_IP4 BIT(25) | |
403 | #define MVNETA_RXD_FIRST_LAST_DESC (BIT(26) | BIT(27)) | |
404 | #define MVNETA_RXD_L4_CSUM_OK BIT(30) | |
405 | ||
9ad8fef6 | 406 | #if defined(__LITTLE_ENDIAN) |
6083ed44 TP |
407 | struct mvneta_tx_desc { |
408 | u32 command; /* Options used by HW for packet transmitting.*/ | |
409 | u16 reserverd1; /* csum_l4 (for future use) */ | |
410 | u16 data_size; /* Data size of transmitted packet in bytes */ | |
411 | u32 buf_phys_addr; /* Physical addr of transmitted buffer */ | |
412 | u32 reserved2; /* hw_cmd - (for future use, PMT) */ | |
413 | u32 reserved3[4]; /* Reserved - (for future use) */ | |
414 | }; | |
415 | ||
416 | struct mvneta_rx_desc { | |
417 | u32 status; /* Info about received packet */ | |
c5aff182 TP |
418 | u16 reserved1; /* pnc_info - (for future use, PnC) */ |
419 | u16 data_size; /* Size of received packet in bytes */ | |
6083ed44 | 420 | |
c5aff182 TP |
421 | u32 buf_phys_addr; /* Physical address of the buffer */ |
422 | u32 reserved2; /* pnc_flow_id (for future use, PnC) */ | |
6083ed44 | 423 | |
c5aff182 TP |
424 | u32 buf_cookie; /* cookie for access to RX buffer in rx path */ |
425 | u16 reserved3; /* prefetch_cmd, for future use */ | |
426 | u16 reserved4; /* csum_l4 - (for future use, PnC) */ | |
6083ed44 | 427 | |
c5aff182 TP |
428 | u32 reserved5; /* pnc_extra PnC (for future use, PnC) */ |
429 | u32 reserved6; /* hw_cmd (for future use, PnC and HWF) */ | |
430 | }; | |
9ad8fef6 TP |
431 | #else |
432 | struct mvneta_tx_desc { | |
433 | u16 data_size; /* Data size of transmitted packet in bytes */ | |
434 | u16 reserverd1; /* csum_l4 (for future use) */ | |
435 | u32 command; /* Options used by HW for packet transmitting.*/ | |
436 | u32 reserved2; /* hw_cmd - (for future use, PMT) */ | |
437 | u32 buf_phys_addr; /* Physical addr of transmitted buffer */ | |
438 | u32 reserved3[4]; /* Reserved - (for future use) */ | |
439 | }; | |
440 | ||
441 | struct mvneta_rx_desc { | |
442 | u16 data_size; /* Size of received packet in bytes */ | |
443 | u16 reserved1; /* pnc_info - (for future use, PnC) */ | |
444 | u32 status; /* Info about received packet */ | |
445 | ||
446 | u32 reserved2; /* pnc_flow_id (for future use, PnC) */ | |
447 | u32 buf_phys_addr; /* Physical address of the buffer */ | |
448 | ||
449 | u16 reserved4; /* csum_l4 - (for future use, PnC) */ | |
450 | u16 reserved3; /* prefetch_cmd, for future use */ | |
451 | u32 buf_cookie; /* cookie for access to RX buffer in rx path */ | |
452 | ||
453 | u32 reserved5; /* pnc_extra PnC (for future use, PnC) */ | |
454 | u32 reserved6; /* hw_cmd (for future use, PnC and HWF) */ | |
455 | }; | |
456 | #endif | |
c5aff182 TP |
457 | |
458 | struct mvneta_tx_queue { | |
459 | /* Number of this TX queue, in the range 0-7 */ | |
460 | u8 id; | |
461 | ||
462 | /* Number of TX DMA descriptors in the descriptor ring */ | |
463 | int size; | |
464 | ||
465 | /* Number of currently used TX DMA descriptor in the | |
6a20c175 TP |
466 | * descriptor ring |
467 | */ | |
c5aff182 | 468 | int count; |
8eef5f97 EG |
469 | int tx_stop_threshold; |
470 | int tx_wake_threshold; | |
c5aff182 TP |
471 | |
472 | /* Array of transmitted skb */ | |
473 | struct sk_buff **tx_skb; | |
474 | ||
475 | /* Index of last TX DMA descriptor that was inserted */ | |
476 | int txq_put_index; | |
477 | ||
478 | /* Index of the TX DMA descriptor to be cleaned up */ | |
479 | int txq_get_index; | |
480 | ||
481 | u32 done_pkts_coal; | |
482 | ||
483 | /* Virtual address of the TX DMA descriptors array */ | |
484 | struct mvneta_tx_desc *descs; | |
485 | ||
486 | /* DMA address of the TX DMA descriptors array */ | |
487 | dma_addr_t descs_phys; | |
488 | ||
489 | /* Index of the last TX DMA descriptor */ | |
490 | int last_desc; | |
491 | ||
492 | /* Index of the next TX DMA descriptor to process */ | |
493 | int next_desc_to_proc; | |
2adb719d EG |
494 | |
495 | /* DMA buffers for TSO headers */ | |
496 | char *tso_hdrs; | |
497 | ||
498 | /* DMA address of TSO headers */ | |
499 | dma_addr_t tso_hdrs_phys; | |
c5aff182 TP |
500 | }; |
501 | ||
502 | struct mvneta_rx_queue { | |
503 | /* rx queue number, in the range 0-7 */ | |
504 | u8 id; | |
505 | ||
506 | /* num of rx descriptors in the rx descriptor ring */ | |
507 | int size; | |
508 | ||
509 | /* counter of times when mvneta_refill() failed */ | |
510 | int missed; | |
511 | ||
512 | u32 pkts_coal; | |
513 | u32 time_coal; | |
514 | ||
515 | /* Virtual address of the RX DMA descriptors array */ | |
516 | struct mvneta_rx_desc *descs; | |
517 | ||
518 | /* DMA address of the RX DMA descriptors array */ | |
519 | dma_addr_t descs_phys; | |
520 | ||
521 | /* Index of the last RX DMA descriptor */ | |
522 | int last_desc; | |
523 | ||
524 | /* Index of the next RX DMA descriptor to process */ | |
525 | int next_desc_to_proc; | |
526 | }; | |
527 | ||
edadb7fa EG |
528 | /* The hardware supports eight (8) rx queues, but we are only allowing |
529 | * the first one to be used. Therefore, let's just allocate one queue. | |
530 | */ | |
d8936657 | 531 | static int rxq_number = 8; |
c5aff182 TP |
532 | static int txq_number = 8; |
533 | ||
534 | static int rxq_def; | |
c5aff182 | 535 | |
f19fadfc | 536 | static int rx_copybreak __read_mostly = 256; |
537 | ||
c5aff182 TP |
538 | #define MVNETA_DRIVER_NAME "mvneta" |
539 | #define MVNETA_DRIVER_VERSION "1.0" | |
540 | ||
541 | /* Utility/helper methods */ | |
542 | ||
543 | /* Write helper method */ | |
544 | static void mvreg_write(struct mvneta_port *pp, u32 offset, u32 data) | |
545 | { | |
546 | writel(data, pp->base + offset); | |
547 | } | |
548 | ||
549 | /* Read helper method */ | |
550 | static u32 mvreg_read(struct mvneta_port *pp, u32 offset) | |
551 | { | |
552 | return readl(pp->base + offset); | |
553 | } | |
554 | ||
555 | /* Increment txq get counter */ | |
556 | static void mvneta_txq_inc_get(struct mvneta_tx_queue *txq) | |
557 | { | |
558 | txq->txq_get_index++; | |
559 | if (txq->txq_get_index == txq->size) | |
560 | txq->txq_get_index = 0; | |
561 | } | |
562 | ||
563 | /* Increment txq put counter */ | |
564 | static void mvneta_txq_inc_put(struct mvneta_tx_queue *txq) | |
565 | { | |
566 | txq->txq_put_index++; | |
567 | if (txq->txq_put_index == txq->size) | |
568 | txq->txq_put_index = 0; | |
569 | } | |
570 | ||
571 | ||
572 | /* Clear all MIB counters */ | |
573 | static void mvneta_mib_counters_clear(struct mvneta_port *pp) | |
574 | { | |
575 | int i; | |
576 | u32 dummy; | |
577 | ||
578 | /* Perform dummy reads from MIB counters */ | |
579 | for (i = 0; i < MVNETA_MIB_LATE_COLLISION; i += 4) | |
580 | dummy = mvreg_read(pp, (MVNETA_MIB_COUNTERS_BASE + i)); | |
e483911f AL |
581 | dummy = mvreg_read(pp, MVNETA_RX_DISCARD_FRAME_COUNT); |
582 | dummy = mvreg_read(pp, MVNETA_OVERRUN_FRAME_COUNT); | |
c5aff182 TP |
583 | } |
584 | ||
585 | /* Get System Network Statistics */ | |
586 | struct rtnl_link_stats64 *mvneta_get_stats64(struct net_device *dev, | |
587 | struct rtnl_link_stats64 *stats) | |
588 | { | |
589 | struct mvneta_port *pp = netdev_priv(dev); | |
590 | unsigned int start; | |
74c41b04 | 591 | int cpu; |
c5aff182 | 592 | |
74c41b04 | 593 | for_each_possible_cpu(cpu) { |
594 | struct mvneta_pcpu_stats *cpu_stats; | |
595 | u64 rx_packets; | |
596 | u64 rx_bytes; | |
597 | u64 tx_packets; | |
598 | u64 tx_bytes; | |
c5aff182 | 599 | |
74c41b04 | 600 | cpu_stats = per_cpu_ptr(pp->stats, cpu); |
601 | do { | |
57a7744e | 602 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); |
74c41b04 | 603 | rx_packets = cpu_stats->rx_packets; |
604 | rx_bytes = cpu_stats->rx_bytes; | |
605 | tx_packets = cpu_stats->tx_packets; | |
606 | tx_bytes = cpu_stats->tx_bytes; | |
57a7744e | 607 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); |
c5aff182 | 608 | |
74c41b04 | 609 | stats->rx_packets += rx_packets; |
610 | stats->rx_bytes += rx_bytes; | |
611 | stats->tx_packets += tx_packets; | |
612 | stats->tx_bytes += tx_bytes; | |
613 | } | |
c5aff182 TP |
614 | |
615 | stats->rx_errors = dev->stats.rx_errors; | |
616 | stats->rx_dropped = dev->stats.rx_dropped; | |
617 | ||
618 | stats->tx_dropped = dev->stats.tx_dropped; | |
619 | ||
620 | return stats; | |
621 | } | |
622 | ||
623 | /* Rx descriptors helper methods */ | |
624 | ||
5428213c | 625 | /* Checks whether the RX descriptor having this status is both the first |
626 | * and the last descriptor for the RX packet. Each RX packet is currently | |
c5aff182 TP |
627 | * received through a single RX descriptor, so not having each RX |
628 | * descriptor with its first and last bits set is an error | |
629 | */ | |
5428213c | 630 | static int mvneta_rxq_desc_is_first_last(u32 status) |
c5aff182 | 631 | { |
5428213c | 632 | return (status & MVNETA_RXD_FIRST_LAST_DESC) == |
c5aff182 TP |
633 | MVNETA_RXD_FIRST_LAST_DESC; |
634 | } | |
635 | ||
636 | /* Add number of descriptors ready to receive new packets */ | |
637 | static void mvneta_rxq_non_occup_desc_add(struct mvneta_port *pp, | |
638 | struct mvneta_rx_queue *rxq, | |
639 | int ndescs) | |
640 | { | |
641 | /* Only MVNETA_RXQ_ADD_NON_OCCUPIED_MAX (255) descriptors can | |
6a20c175 TP |
642 | * be added at once |
643 | */ | |
c5aff182 TP |
644 | while (ndescs > MVNETA_RXQ_ADD_NON_OCCUPIED_MAX) { |
645 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), | |
646 | (MVNETA_RXQ_ADD_NON_OCCUPIED_MAX << | |
647 | MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT)); | |
648 | ndescs -= MVNETA_RXQ_ADD_NON_OCCUPIED_MAX; | |
649 | } | |
650 | ||
651 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), | |
652 | (ndescs << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT)); | |
653 | } | |
654 | ||
655 | /* Get number of RX descriptors occupied by received packets */ | |
656 | static int mvneta_rxq_busy_desc_num_get(struct mvneta_port *pp, | |
657 | struct mvneta_rx_queue *rxq) | |
658 | { | |
659 | u32 val; | |
660 | ||
661 | val = mvreg_read(pp, MVNETA_RXQ_STATUS_REG(rxq->id)); | |
662 | return val & MVNETA_RXQ_OCCUPIED_ALL_MASK; | |
663 | } | |
664 | ||
6a20c175 | 665 | /* Update num of rx desc called upon return from rx path or |
c5aff182 TP |
666 | * from mvneta_rxq_drop_pkts(). |
667 | */ | |
668 | static void mvneta_rxq_desc_num_update(struct mvneta_port *pp, | |
669 | struct mvneta_rx_queue *rxq, | |
670 | int rx_done, int rx_filled) | |
671 | { | |
672 | u32 val; | |
673 | ||
674 | if ((rx_done <= 0xff) && (rx_filled <= 0xff)) { | |
675 | val = rx_done | | |
676 | (rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT); | |
677 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val); | |
678 | return; | |
679 | } | |
680 | ||
681 | /* Only 255 descriptors can be added at once */ | |
682 | while ((rx_done > 0) || (rx_filled > 0)) { | |
683 | if (rx_done <= 0xff) { | |
684 | val = rx_done; | |
685 | rx_done = 0; | |
686 | } else { | |
687 | val = 0xff; | |
688 | rx_done -= 0xff; | |
689 | } | |
690 | if (rx_filled <= 0xff) { | |
691 | val |= rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT; | |
692 | rx_filled = 0; | |
693 | } else { | |
694 | val |= 0xff << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT; | |
695 | rx_filled -= 0xff; | |
696 | } | |
697 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val); | |
698 | } | |
699 | } | |
700 | ||
701 | /* Get pointer to next RX descriptor to be processed by SW */ | |
702 | static struct mvneta_rx_desc * | |
703 | mvneta_rxq_next_desc_get(struct mvneta_rx_queue *rxq) | |
704 | { | |
705 | int rx_desc = rxq->next_desc_to_proc; | |
706 | ||
707 | rxq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(rxq, rx_desc); | |
34e4179d | 708 | prefetch(rxq->descs + rxq->next_desc_to_proc); |
c5aff182 TP |
709 | return rxq->descs + rx_desc; |
710 | } | |
711 | ||
712 | /* Change maximum receive size of the port. */ | |
713 | static void mvneta_max_rx_size_set(struct mvneta_port *pp, int max_rx_size) | |
714 | { | |
715 | u32 val; | |
716 | ||
717 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
718 | val &= ~MVNETA_GMAC_MAX_RX_SIZE_MASK; | |
719 | val |= ((max_rx_size - MVNETA_MH_SIZE) / 2) << | |
720 | MVNETA_GMAC_MAX_RX_SIZE_SHIFT; | |
721 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
722 | } | |
723 | ||
724 | ||
725 | /* Set rx queue offset */ | |
726 | static void mvneta_rxq_offset_set(struct mvneta_port *pp, | |
727 | struct mvneta_rx_queue *rxq, | |
728 | int offset) | |
729 | { | |
730 | u32 val; | |
731 | ||
732 | val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id)); | |
733 | val &= ~MVNETA_RXQ_PKT_OFFSET_ALL_MASK; | |
734 | ||
735 | /* Offset is in */ | |
736 | val |= MVNETA_RXQ_PKT_OFFSET_MASK(offset >> 3); | |
737 | mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val); | |
738 | } | |
739 | ||
740 | ||
741 | /* Tx descriptors helper methods */ | |
742 | ||
743 | /* Update HW with number of TX descriptors to be sent */ | |
744 | static void mvneta_txq_pend_desc_add(struct mvneta_port *pp, | |
745 | struct mvneta_tx_queue *txq, | |
746 | int pend_desc) | |
747 | { | |
748 | u32 val; | |
749 | ||
750 | /* Only 255 descriptors can be added at once ; Assume caller | |
6a20c175 TP |
751 | * process TX desriptors in quanta less than 256 |
752 | */ | |
c5aff182 TP |
753 | val = pend_desc; |
754 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
755 | } | |
756 | ||
757 | /* Get pointer to next TX descriptor to be processed (send) by HW */ | |
758 | static struct mvneta_tx_desc * | |
759 | mvneta_txq_next_desc_get(struct mvneta_tx_queue *txq) | |
760 | { | |
761 | int tx_desc = txq->next_desc_to_proc; | |
762 | ||
763 | txq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(txq, tx_desc); | |
764 | return txq->descs + tx_desc; | |
765 | } | |
766 | ||
767 | /* Release the last allocated TX descriptor. Useful to handle DMA | |
6a20c175 TP |
768 | * mapping failures in the TX path. |
769 | */ | |
c5aff182 TP |
770 | static void mvneta_txq_desc_put(struct mvneta_tx_queue *txq) |
771 | { | |
772 | if (txq->next_desc_to_proc == 0) | |
773 | txq->next_desc_to_proc = txq->last_desc - 1; | |
774 | else | |
775 | txq->next_desc_to_proc--; | |
776 | } | |
777 | ||
778 | /* Set rxq buf size */ | |
779 | static void mvneta_rxq_buf_size_set(struct mvneta_port *pp, | |
780 | struct mvneta_rx_queue *rxq, | |
781 | int buf_size) | |
782 | { | |
783 | u32 val; | |
784 | ||
785 | val = mvreg_read(pp, MVNETA_RXQ_SIZE_REG(rxq->id)); | |
786 | ||
787 | val &= ~MVNETA_RXQ_BUF_SIZE_MASK; | |
788 | val |= ((buf_size >> 3) << MVNETA_RXQ_BUF_SIZE_SHIFT); | |
789 | ||
790 | mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), val); | |
791 | } | |
792 | ||
793 | /* Disable buffer management (BM) */ | |
794 | static void mvneta_rxq_bm_disable(struct mvneta_port *pp, | |
795 | struct mvneta_rx_queue *rxq) | |
796 | { | |
797 | u32 val; | |
798 | ||
799 | val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id)); | |
800 | val &= ~MVNETA_RXQ_HW_BUF_ALLOC; | |
801 | mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val); | |
802 | } | |
803 | ||
c5aff182 TP |
804 | /* Start the Ethernet port RX and TX activity */ |
805 | static void mvneta_port_up(struct mvneta_port *pp) | |
806 | { | |
807 | int queue; | |
808 | u32 q_map; | |
809 | ||
810 | /* Enable all initialized TXs. */ | |
c5aff182 TP |
811 | q_map = 0; |
812 | for (queue = 0; queue < txq_number; queue++) { | |
813 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
814 | if (txq->descs != NULL) | |
815 | q_map |= (1 << queue); | |
816 | } | |
817 | mvreg_write(pp, MVNETA_TXQ_CMD, q_map); | |
818 | ||
819 | /* Enable all initialized RXQs. */ | |
d8936657 | 820 | mvreg_write(pp, MVNETA_RXQ_CMD, BIT(rxq_def)); |
c5aff182 TP |
821 | } |
822 | ||
823 | /* Stop the Ethernet port activity */ | |
824 | static void mvneta_port_down(struct mvneta_port *pp) | |
825 | { | |
826 | u32 val; | |
827 | int count; | |
828 | ||
829 | /* Stop Rx port activity. Check port Rx activity. */ | |
830 | val = mvreg_read(pp, MVNETA_RXQ_CMD) & MVNETA_RXQ_ENABLE_MASK; | |
831 | ||
832 | /* Issue stop command for active channels only */ | |
833 | if (val != 0) | |
834 | mvreg_write(pp, MVNETA_RXQ_CMD, | |
835 | val << MVNETA_RXQ_DISABLE_SHIFT); | |
836 | ||
837 | /* Wait for all Rx activity to terminate. */ | |
838 | count = 0; | |
839 | do { | |
840 | if (count++ >= MVNETA_RX_DISABLE_TIMEOUT_MSEC) { | |
841 | netdev_warn(pp->dev, | |
842 | "TIMEOUT for RX stopped ! rx_queue_cmd: 0x08%x\n", | |
843 | val); | |
844 | break; | |
845 | } | |
846 | mdelay(1); | |
847 | ||
848 | val = mvreg_read(pp, MVNETA_RXQ_CMD); | |
849 | } while (val & 0xff); | |
850 | ||
851 | /* Stop Tx port activity. Check port Tx activity. Issue stop | |
6a20c175 TP |
852 | * command for active channels only |
853 | */ | |
c5aff182 TP |
854 | val = (mvreg_read(pp, MVNETA_TXQ_CMD)) & MVNETA_TXQ_ENABLE_MASK; |
855 | ||
856 | if (val != 0) | |
857 | mvreg_write(pp, MVNETA_TXQ_CMD, | |
858 | (val << MVNETA_TXQ_DISABLE_SHIFT)); | |
859 | ||
860 | /* Wait for all Tx activity to terminate. */ | |
861 | count = 0; | |
862 | do { | |
863 | if (count++ >= MVNETA_TX_DISABLE_TIMEOUT_MSEC) { | |
864 | netdev_warn(pp->dev, | |
865 | "TIMEOUT for TX stopped status=0x%08x\n", | |
866 | val); | |
867 | break; | |
868 | } | |
869 | mdelay(1); | |
870 | ||
871 | /* Check TX Command reg that all Txqs are stopped */ | |
872 | val = mvreg_read(pp, MVNETA_TXQ_CMD); | |
873 | ||
874 | } while (val & 0xff); | |
875 | ||
876 | /* Double check to verify that TX FIFO is empty */ | |
877 | count = 0; | |
878 | do { | |
879 | if (count++ >= MVNETA_TX_FIFO_EMPTY_TIMEOUT) { | |
880 | netdev_warn(pp->dev, | |
881 | "TX FIFO empty timeout status=0x08%x\n", | |
882 | val); | |
883 | break; | |
884 | } | |
885 | mdelay(1); | |
886 | ||
887 | val = mvreg_read(pp, MVNETA_PORT_STATUS); | |
888 | } while (!(val & MVNETA_TX_FIFO_EMPTY) && | |
889 | (val & MVNETA_TX_IN_PRGRS)); | |
890 | ||
891 | udelay(200); | |
892 | } | |
893 | ||
894 | /* Enable the port by setting the port enable bit of the MAC control register */ | |
895 | static void mvneta_port_enable(struct mvneta_port *pp) | |
896 | { | |
897 | u32 val; | |
898 | ||
899 | /* Enable port */ | |
900 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
901 | val |= MVNETA_GMAC0_PORT_ENABLE; | |
902 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
903 | } | |
904 | ||
905 | /* Disable the port and wait for about 200 usec before retuning */ | |
906 | static void mvneta_port_disable(struct mvneta_port *pp) | |
907 | { | |
908 | u32 val; | |
909 | ||
910 | /* Reset the Enable bit in the Serial Control Register */ | |
911 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
912 | val &= ~MVNETA_GMAC0_PORT_ENABLE; | |
913 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
914 | ||
915 | udelay(200); | |
916 | } | |
917 | ||
918 | /* Multicast tables methods */ | |
919 | ||
920 | /* Set all entries in Unicast MAC Table; queue==-1 means reject all */ | |
921 | static void mvneta_set_ucast_table(struct mvneta_port *pp, int queue) | |
922 | { | |
923 | int offset; | |
924 | u32 val; | |
925 | ||
926 | if (queue == -1) { | |
927 | val = 0; | |
928 | } else { | |
929 | val = 0x1 | (queue << 1); | |
930 | val |= (val << 24) | (val << 16) | (val << 8); | |
931 | } | |
932 | ||
933 | for (offset = 0; offset <= 0xc; offset += 4) | |
934 | mvreg_write(pp, MVNETA_DA_FILT_UCAST_BASE + offset, val); | |
935 | } | |
936 | ||
937 | /* Set all entries in Special Multicast MAC Table; queue==-1 means reject all */ | |
938 | static void mvneta_set_special_mcast_table(struct mvneta_port *pp, int queue) | |
939 | { | |
940 | int offset; | |
941 | u32 val; | |
942 | ||
943 | if (queue == -1) { | |
944 | val = 0; | |
945 | } else { | |
946 | val = 0x1 | (queue << 1); | |
947 | val |= (val << 24) | (val << 16) | (val << 8); | |
948 | } | |
949 | ||
950 | for (offset = 0; offset <= 0xfc; offset += 4) | |
951 | mvreg_write(pp, MVNETA_DA_FILT_SPEC_MCAST + offset, val); | |
952 | ||
953 | } | |
954 | ||
955 | /* Set all entries in Other Multicast MAC Table. queue==-1 means reject all */ | |
956 | static void mvneta_set_other_mcast_table(struct mvneta_port *pp, int queue) | |
957 | { | |
958 | int offset; | |
959 | u32 val; | |
960 | ||
961 | if (queue == -1) { | |
962 | memset(pp->mcast_count, 0, sizeof(pp->mcast_count)); | |
963 | val = 0; | |
964 | } else { | |
965 | memset(pp->mcast_count, 1, sizeof(pp->mcast_count)); | |
966 | val = 0x1 | (queue << 1); | |
967 | val |= (val << 24) | (val << 16) | (val << 8); | |
968 | } | |
969 | ||
970 | for (offset = 0; offset <= 0xfc; offset += 4) | |
971 | mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + offset, val); | |
972 | } | |
973 | ||
974 | /* This method sets defaults to the NETA port: | |
975 | * Clears interrupt Cause and Mask registers. | |
976 | * Clears all MAC tables. | |
977 | * Sets defaults to all registers. | |
978 | * Resets RX and TX descriptor rings. | |
979 | * Resets PHY. | |
980 | * This method can be called after mvneta_port_down() to return the port | |
981 | * settings to defaults. | |
982 | */ | |
983 | static void mvneta_defaults_set(struct mvneta_port *pp) | |
984 | { | |
985 | int cpu; | |
986 | int queue; | |
987 | u32 val; | |
988 | ||
989 | /* Clear all Cause registers */ | |
990 | mvreg_write(pp, MVNETA_INTR_NEW_CAUSE, 0); | |
991 | mvreg_write(pp, MVNETA_INTR_OLD_CAUSE, 0); | |
992 | mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0); | |
993 | ||
994 | /* Mask all interrupts */ | |
995 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
996 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
997 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
998 | mvreg_write(pp, MVNETA_INTR_ENABLE, 0); | |
999 | ||
1000 | /* Enable MBUS Retry bit16 */ | |
1001 | mvreg_write(pp, MVNETA_MBUS_RETRY, 0x20); | |
1002 | ||
1003 | /* Set CPU queue access map - all CPUs have access to all RX | |
6a20c175 TP |
1004 | * queues and to all TX queues |
1005 | */ | |
2502d0ef | 1006 | for_each_present_cpu(cpu) |
c5aff182 TP |
1007 | mvreg_write(pp, MVNETA_CPU_MAP(cpu), |
1008 | (MVNETA_CPU_RXQ_ACCESS_ALL_MASK | | |
1009 | MVNETA_CPU_TXQ_ACCESS_ALL_MASK)); | |
1010 | ||
1011 | /* Reset RX and TX DMAs */ | |
1012 | mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET); | |
1013 | mvreg_write(pp, MVNETA_PORT_TX_RESET, MVNETA_PORT_TX_DMA_RESET); | |
1014 | ||
1015 | /* Disable Legacy WRR, Disable EJP, Release from reset */ | |
1016 | mvreg_write(pp, MVNETA_TXQ_CMD_1, 0); | |
1017 | for (queue = 0; queue < txq_number; queue++) { | |
1018 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(queue), 0); | |
1019 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(queue), 0); | |
1020 | } | |
1021 | ||
1022 | mvreg_write(pp, MVNETA_PORT_TX_RESET, 0); | |
1023 | mvreg_write(pp, MVNETA_PORT_RX_RESET, 0); | |
1024 | ||
1025 | /* Set Port Acceleration Mode */ | |
1026 | val = MVNETA_ACC_MODE_EXT; | |
1027 | mvreg_write(pp, MVNETA_ACC_MODE, val); | |
1028 | ||
1029 | /* Update val of portCfg register accordingly with all RxQueue types */ | |
1030 | val = MVNETA_PORT_CONFIG_DEFL_VALUE(rxq_def); | |
1031 | mvreg_write(pp, MVNETA_PORT_CONFIG, val); | |
1032 | ||
1033 | val = 0; | |
1034 | mvreg_write(pp, MVNETA_PORT_CONFIG_EXTEND, val); | |
1035 | mvreg_write(pp, MVNETA_RX_MIN_FRAME_SIZE, 64); | |
1036 | ||
1037 | /* Build PORT_SDMA_CONFIG_REG */ | |
1038 | val = 0; | |
1039 | ||
1040 | /* Default burst size */ | |
1041 | val |= MVNETA_TX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16); | |
1042 | val |= MVNETA_RX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16); | |
9ad8fef6 | 1043 | val |= MVNETA_RX_NO_DATA_SWAP | MVNETA_TX_NO_DATA_SWAP; |
c5aff182 | 1044 | |
9ad8fef6 TP |
1045 | #if defined(__BIG_ENDIAN) |
1046 | val |= MVNETA_DESC_SWAP; | |
1047 | #endif | |
c5aff182 TP |
1048 | |
1049 | /* Assign port SDMA configuration */ | |
1050 | mvreg_write(pp, MVNETA_SDMA_CONFIG, val); | |
1051 | ||
71408602 TP |
1052 | /* Disable PHY polling in hardware, since we're using the |
1053 | * kernel phylib to do this. | |
1054 | */ | |
1055 | val = mvreg_read(pp, MVNETA_UNIT_CONTROL); | |
1056 | val &= ~MVNETA_PHY_POLLING_ENABLE; | |
1057 | mvreg_write(pp, MVNETA_UNIT_CONTROL, val); | |
1058 | ||
898b2970 SS |
1059 | if (pp->use_inband_status) { |
1060 | val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
1061 | val &= ~(MVNETA_GMAC_FORCE_LINK_PASS | | |
1062 | MVNETA_GMAC_FORCE_LINK_DOWN | | |
1063 | MVNETA_GMAC_AN_FLOW_CTRL_EN); | |
1064 | val |= MVNETA_GMAC_INBAND_AN_ENABLE | | |
1065 | MVNETA_GMAC_AN_SPEED_EN | | |
1066 | MVNETA_GMAC_AN_DUPLEX_EN; | |
1067 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
1068 | val = mvreg_read(pp, MVNETA_GMAC_CLOCK_DIVIDER); | |
1069 | val |= MVNETA_GMAC_1MS_CLOCK_ENABLE; | |
1070 | mvreg_write(pp, MVNETA_GMAC_CLOCK_DIVIDER, val); | |
538761b7 SS |
1071 | } else { |
1072 | val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
1073 | val &= ~(MVNETA_GMAC_INBAND_AN_ENABLE | | |
1074 | MVNETA_GMAC_AN_SPEED_EN | | |
1075 | MVNETA_GMAC_AN_DUPLEX_EN); | |
1076 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
898b2970 SS |
1077 | } |
1078 | ||
c5aff182 TP |
1079 | mvneta_set_ucast_table(pp, -1); |
1080 | mvneta_set_special_mcast_table(pp, -1); | |
1081 | mvneta_set_other_mcast_table(pp, -1); | |
1082 | ||
1083 | /* Set port interrupt enable register - default enable all */ | |
1084 | mvreg_write(pp, MVNETA_INTR_ENABLE, | |
1085 | (MVNETA_RXQ_INTR_ENABLE_ALL_MASK | |
1086 | | MVNETA_TXQ_INTR_ENABLE_ALL_MASK)); | |
e483911f AL |
1087 | |
1088 | mvneta_mib_counters_clear(pp); | |
c5aff182 TP |
1089 | } |
1090 | ||
1091 | /* Set max sizes for tx queues */ | |
1092 | static void mvneta_txq_max_tx_size_set(struct mvneta_port *pp, int max_tx_size) | |
1093 | ||
1094 | { | |
1095 | u32 val, size, mtu; | |
1096 | int queue; | |
1097 | ||
1098 | mtu = max_tx_size * 8; | |
1099 | if (mtu > MVNETA_TX_MTU_MAX) | |
1100 | mtu = MVNETA_TX_MTU_MAX; | |
1101 | ||
1102 | /* Set MTU */ | |
1103 | val = mvreg_read(pp, MVNETA_TX_MTU); | |
1104 | val &= ~MVNETA_TX_MTU_MAX; | |
1105 | val |= mtu; | |
1106 | mvreg_write(pp, MVNETA_TX_MTU, val); | |
1107 | ||
1108 | /* TX token size and all TXQs token size must be larger that MTU */ | |
1109 | val = mvreg_read(pp, MVNETA_TX_TOKEN_SIZE); | |
1110 | ||
1111 | size = val & MVNETA_TX_TOKEN_SIZE_MAX; | |
1112 | if (size < mtu) { | |
1113 | size = mtu; | |
1114 | val &= ~MVNETA_TX_TOKEN_SIZE_MAX; | |
1115 | val |= size; | |
1116 | mvreg_write(pp, MVNETA_TX_TOKEN_SIZE, val); | |
1117 | } | |
1118 | for (queue = 0; queue < txq_number; queue++) { | |
1119 | val = mvreg_read(pp, MVNETA_TXQ_TOKEN_SIZE_REG(queue)); | |
1120 | ||
1121 | size = val & MVNETA_TXQ_TOKEN_SIZE_MAX; | |
1122 | if (size < mtu) { | |
1123 | size = mtu; | |
1124 | val &= ~MVNETA_TXQ_TOKEN_SIZE_MAX; | |
1125 | val |= size; | |
1126 | mvreg_write(pp, MVNETA_TXQ_TOKEN_SIZE_REG(queue), val); | |
1127 | } | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | /* Set unicast address */ | |
1132 | static void mvneta_set_ucast_addr(struct mvneta_port *pp, u8 last_nibble, | |
1133 | int queue) | |
1134 | { | |
1135 | unsigned int unicast_reg; | |
1136 | unsigned int tbl_offset; | |
1137 | unsigned int reg_offset; | |
1138 | ||
1139 | /* Locate the Unicast table entry */ | |
1140 | last_nibble = (0xf & last_nibble); | |
1141 | ||
1142 | /* offset from unicast tbl base */ | |
1143 | tbl_offset = (last_nibble / 4) * 4; | |
1144 | ||
1145 | /* offset within the above reg */ | |
1146 | reg_offset = last_nibble % 4; | |
1147 | ||
1148 | unicast_reg = mvreg_read(pp, (MVNETA_DA_FILT_UCAST_BASE + tbl_offset)); | |
1149 | ||
1150 | if (queue == -1) { | |
1151 | /* Clear accepts frame bit at specified unicast DA tbl entry */ | |
1152 | unicast_reg &= ~(0xff << (8 * reg_offset)); | |
1153 | } else { | |
1154 | unicast_reg &= ~(0xff << (8 * reg_offset)); | |
1155 | unicast_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
1156 | } | |
1157 | ||
1158 | mvreg_write(pp, (MVNETA_DA_FILT_UCAST_BASE + tbl_offset), unicast_reg); | |
1159 | } | |
1160 | ||
1161 | /* Set mac address */ | |
1162 | static void mvneta_mac_addr_set(struct mvneta_port *pp, unsigned char *addr, | |
1163 | int queue) | |
1164 | { | |
1165 | unsigned int mac_h; | |
1166 | unsigned int mac_l; | |
1167 | ||
1168 | if (queue != -1) { | |
1169 | mac_l = (addr[4] << 8) | (addr[5]); | |
1170 | mac_h = (addr[0] << 24) | (addr[1] << 16) | | |
1171 | (addr[2] << 8) | (addr[3] << 0); | |
1172 | ||
1173 | mvreg_write(pp, MVNETA_MAC_ADDR_LOW, mac_l); | |
1174 | mvreg_write(pp, MVNETA_MAC_ADDR_HIGH, mac_h); | |
1175 | } | |
1176 | ||
1177 | /* Accept frames of this address */ | |
1178 | mvneta_set_ucast_addr(pp, addr[5], queue); | |
1179 | } | |
1180 | ||
6a20c175 TP |
1181 | /* Set the number of packets that will be received before RX interrupt |
1182 | * will be generated by HW. | |
c5aff182 TP |
1183 | */ |
1184 | static void mvneta_rx_pkts_coal_set(struct mvneta_port *pp, | |
1185 | struct mvneta_rx_queue *rxq, u32 value) | |
1186 | { | |
1187 | mvreg_write(pp, MVNETA_RXQ_THRESHOLD_REG(rxq->id), | |
1188 | value | MVNETA_RXQ_NON_OCCUPIED(0)); | |
1189 | rxq->pkts_coal = value; | |
1190 | } | |
1191 | ||
6a20c175 TP |
1192 | /* Set the time delay in usec before RX interrupt will be generated by |
1193 | * HW. | |
c5aff182 TP |
1194 | */ |
1195 | static void mvneta_rx_time_coal_set(struct mvneta_port *pp, | |
1196 | struct mvneta_rx_queue *rxq, u32 value) | |
1197 | { | |
189dd626 TP |
1198 | u32 val; |
1199 | unsigned long clk_rate; | |
1200 | ||
1201 | clk_rate = clk_get_rate(pp->clk); | |
1202 | val = (clk_rate / 1000000) * value; | |
c5aff182 TP |
1203 | |
1204 | mvreg_write(pp, MVNETA_RXQ_TIME_COAL_REG(rxq->id), val); | |
1205 | rxq->time_coal = value; | |
1206 | } | |
1207 | ||
1208 | /* Set threshold for TX_DONE pkts coalescing */ | |
1209 | static void mvneta_tx_done_pkts_coal_set(struct mvneta_port *pp, | |
1210 | struct mvneta_tx_queue *txq, u32 value) | |
1211 | { | |
1212 | u32 val; | |
1213 | ||
1214 | val = mvreg_read(pp, MVNETA_TXQ_SIZE_REG(txq->id)); | |
1215 | ||
1216 | val &= ~MVNETA_TXQ_SENT_THRESH_ALL_MASK; | |
1217 | val |= MVNETA_TXQ_SENT_THRESH_MASK(value); | |
1218 | ||
1219 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), val); | |
1220 | ||
1221 | txq->done_pkts_coal = value; | |
1222 | } | |
1223 | ||
c5aff182 TP |
1224 | /* Handle rx descriptor fill by setting buf_cookie and buf_phys_addr */ |
1225 | static void mvneta_rx_desc_fill(struct mvneta_rx_desc *rx_desc, | |
1226 | u32 phys_addr, u32 cookie) | |
1227 | { | |
1228 | rx_desc->buf_cookie = cookie; | |
1229 | rx_desc->buf_phys_addr = phys_addr; | |
1230 | } | |
1231 | ||
1232 | /* Decrement sent descriptors counter */ | |
1233 | static void mvneta_txq_sent_desc_dec(struct mvneta_port *pp, | |
1234 | struct mvneta_tx_queue *txq, | |
1235 | int sent_desc) | |
1236 | { | |
1237 | u32 val; | |
1238 | ||
1239 | /* Only 255 TX descriptors can be updated at once */ | |
1240 | while (sent_desc > 0xff) { | |
1241 | val = 0xff << MVNETA_TXQ_DEC_SENT_SHIFT; | |
1242 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
1243 | sent_desc = sent_desc - 0xff; | |
1244 | } | |
1245 | ||
1246 | val = sent_desc << MVNETA_TXQ_DEC_SENT_SHIFT; | |
1247 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
1248 | } | |
1249 | ||
1250 | /* Get number of TX descriptors already sent by HW */ | |
1251 | static int mvneta_txq_sent_desc_num_get(struct mvneta_port *pp, | |
1252 | struct mvneta_tx_queue *txq) | |
1253 | { | |
1254 | u32 val; | |
1255 | int sent_desc; | |
1256 | ||
1257 | val = mvreg_read(pp, MVNETA_TXQ_STATUS_REG(txq->id)); | |
1258 | sent_desc = (val & MVNETA_TXQ_SENT_DESC_MASK) >> | |
1259 | MVNETA_TXQ_SENT_DESC_SHIFT; | |
1260 | ||
1261 | return sent_desc; | |
1262 | } | |
1263 | ||
6a20c175 | 1264 | /* Get number of sent descriptors and decrement counter. |
c5aff182 TP |
1265 | * The number of sent descriptors is returned. |
1266 | */ | |
1267 | static int mvneta_txq_sent_desc_proc(struct mvneta_port *pp, | |
1268 | struct mvneta_tx_queue *txq) | |
1269 | { | |
1270 | int sent_desc; | |
1271 | ||
1272 | /* Get number of sent descriptors */ | |
1273 | sent_desc = mvneta_txq_sent_desc_num_get(pp, txq); | |
1274 | ||
1275 | /* Decrement sent descriptors counter */ | |
1276 | if (sent_desc) | |
1277 | mvneta_txq_sent_desc_dec(pp, txq, sent_desc); | |
1278 | ||
1279 | return sent_desc; | |
1280 | } | |
1281 | ||
1282 | /* Set TXQ descriptors fields relevant for CSUM calculation */ | |
1283 | static u32 mvneta_txq_desc_csum(int l3_offs, int l3_proto, | |
1284 | int ip_hdr_len, int l4_proto) | |
1285 | { | |
1286 | u32 command; | |
1287 | ||
1288 | /* Fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk, | |
6a20c175 TP |
1289 | * G_L4_chk, L4_type; required only for checksum |
1290 | * calculation | |
1291 | */ | |
c5aff182 TP |
1292 | command = l3_offs << MVNETA_TX_L3_OFF_SHIFT; |
1293 | command |= ip_hdr_len << MVNETA_TX_IP_HLEN_SHIFT; | |
1294 | ||
0a198587 | 1295 | if (l3_proto == htons(ETH_P_IP)) |
c5aff182 TP |
1296 | command |= MVNETA_TXD_IP_CSUM; |
1297 | else | |
1298 | command |= MVNETA_TX_L3_IP6; | |
1299 | ||
1300 | if (l4_proto == IPPROTO_TCP) | |
1301 | command |= MVNETA_TX_L4_CSUM_FULL; | |
1302 | else if (l4_proto == IPPROTO_UDP) | |
1303 | command |= MVNETA_TX_L4_UDP | MVNETA_TX_L4_CSUM_FULL; | |
1304 | else | |
1305 | command |= MVNETA_TX_L4_CSUM_NOT; | |
1306 | ||
1307 | return command; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | /* Display more error info */ | |
1312 | static void mvneta_rx_error(struct mvneta_port *pp, | |
1313 | struct mvneta_rx_desc *rx_desc) | |
1314 | { | |
1315 | u32 status = rx_desc->status; | |
1316 | ||
5428213c | 1317 | if (!mvneta_rxq_desc_is_first_last(status)) { |
c5aff182 TP |
1318 | netdev_err(pp->dev, |
1319 | "bad rx status %08x (buffer oversize), size=%d\n", | |
5428213c | 1320 | status, rx_desc->data_size); |
c5aff182 TP |
1321 | return; |
1322 | } | |
1323 | ||
1324 | switch (status & MVNETA_RXD_ERR_CODE_MASK) { | |
1325 | case MVNETA_RXD_ERR_CRC: | |
1326 | netdev_err(pp->dev, "bad rx status %08x (crc error), size=%d\n", | |
1327 | status, rx_desc->data_size); | |
1328 | break; | |
1329 | case MVNETA_RXD_ERR_OVERRUN: | |
1330 | netdev_err(pp->dev, "bad rx status %08x (overrun error), size=%d\n", | |
1331 | status, rx_desc->data_size); | |
1332 | break; | |
1333 | case MVNETA_RXD_ERR_LEN: | |
1334 | netdev_err(pp->dev, "bad rx status %08x (max frame length error), size=%d\n", | |
1335 | status, rx_desc->data_size); | |
1336 | break; | |
1337 | case MVNETA_RXD_ERR_RESOURCE: | |
1338 | netdev_err(pp->dev, "bad rx status %08x (resource error), size=%d\n", | |
1339 | status, rx_desc->data_size); | |
1340 | break; | |
1341 | } | |
1342 | } | |
1343 | ||
5428213c | 1344 | /* Handle RX checksum offload based on the descriptor's status */ |
1345 | static void mvneta_rx_csum(struct mvneta_port *pp, u32 status, | |
c5aff182 TP |
1346 | struct sk_buff *skb) |
1347 | { | |
5428213c | 1348 | if ((status & MVNETA_RXD_L3_IP4) && |
1349 | (status & MVNETA_RXD_L4_CSUM_OK)) { | |
c5aff182 TP |
1350 | skb->csum = 0; |
1351 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1352 | return; | |
1353 | } | |
1354 | ||
1355 | skb->ip_summed = CHECKSUM_NONE; | |
1356 | } | |
1357 | ||
6c498974 | 1358 | /* Return tx queue pointer (find last set bit) according to <cause> returned |
1359 | * form tx_done reg. <cause> must not be null. The return value is always a | |
1360 | * valid queue for matching the first one found in <cause>. | |
1361 | */ | |
c5aff182 TP |
1362 | static struct mvneta_tx_queue *mvneta_tx_done_policy(struct mvneta_port *pp, |
1363 | u32 cause) | |
1364 | { | |
1365 | int queue = fls(cause) - 1; | |
1366 | ||
6c498974 | 1367 | return &pp->txqs[queue]; |
c5aff182 TP |
1368 | } |
1369 | ||
1370 | /* Free tx queue skbuffs */ | |
1371 | static void mvneta_txq_bufs_free(struct mvneta_port *pp, | |
1372 | struct mvneta_tx_queue *txq, int num) | |
1373 | { | |
1374 | int i; | |
1375 | ||
1376 | for (i = 0; i < num; i++) { | |
1377 | struct mvneta_tx_desc *tx_desc = txq->descs + | |
1378 | txq->txq_get_index; | |
1379 | struct sk_buff *skb = txq->tx_skb[txq->txq_get_index]; | |
1380 | ||
1381 | mvneta_txq_inc_get(txq); | |
1382 | ||
2e3173a3 EG |
1383 | if (!IS_TSO_HEADER(txq, tx_desc->buf_phys_addr)) |
1384 | dma_unmap_single(pp->dev->dev.parent, | |
1385 | tx_desc->buf_phys_addr, | |
1386 | tx_desc->data_size, DMA_TO_DEVICE); | |
ba7e46ef EG |
1387 | if (!skb) |
1388 | continue; | |
c5aff182 TP |
1389 | dev_kfree_skb_any(skb); |
1390 | } | |
1391 | } | |
1392 | ||
1393 | /* Handle end of transmission */ | |
cd713199 | 1394 | static void mvneta_txq_done(struct mvneta_port *pp, |
c5aff182 TP |
1395 | struct mvneta_tx_queue *txq) |
1396 | { | |
1397 | struct netdev_queue *nq = netdev_get_tx_queue(pp->dev, txq->id); | |
1398 | int tx_done; | |
1399 | ||
1400 | tx_done = mvneta_txq_sent_desc_proc(pp, txq); | |
cd713199 AE |
1401 | if (!tx_done) |
1402 | return; | |
1403 | ||
c5aff182 TP |
1404 | mvneta_txq_bufs_free(pp, txq, tx_done); |
1405 | ||
1406 | txq->count -= tx_done; | |
1407 | ||
1408 | if (netif_tx_queue_stopped(nq)) { | |
8eef5f97 | 1409 | if (txq->count <= txq->tx_wake_threshold) |
c5aff182 TP |
1410 | netif_tx_wake_queue(nq); |
1411 | } | |
c5aff182 TP |
1412 | } |
1413 | ||
8ec2cd48 | 1414 | static void *mvneta_frag_alloc(const struct mvneta_port *pp) |
1415 | { | |
1416 | if (likely(pp->frag_size <= PAGE_SIZE)) | |
1417 | return netdev_alloc_frag(pp->frag_size); | |
1418 | else | |
1419 | return kmalloc(pp->frag_size, GFP_ATOMIC); | |
1420 | } | |
1421 | ||
1422 | static void mvneta_frag_free(const struct mvneta_port *pp, void *data) | |
1423 | { | |
1424 | if (likely(pp->frag_size <= PAGE_SIZE)) | |
13dc0d2b | 1425 | skb_free_frag(data); |
8ec2cd48 | 1426 | else |
1427 | kfree(data); | |
1428 | } | |
1429 | ||
c5aff182 TP |
1430 | /* Refill processing */ |
1431 | static int mvneta_rx_refill(struct mvneta_port *pp, | |
1432 | struct mvneta_rx_desc *rx_desc) | |
1433 | ||
1434 | { | |
1435 | dma_addr_t phys_addr; | |
8ec2cd48 | 1436 | void *data; |
c5aff182 | 1437 | |
8ec2cd48 | 1438 | data = mvneta_frag_alloc(pp); |
1439 | if (!data) | |
c5aff182 TP |
1440 | return -ENOMEM; |
1441 | ||
8ec2cd48 | 1442 | phys_addr = dma_map_single(pp->dev->dev.parent, data, |
c5aff182 TP |
1443 | MVNETA_RX_BUF_SIZE(pp->pkt_size), |
1444 | DMA_FROM_DEVICE); | |
1445 | if (unlikely(dma_mapping_error(pp->dev->dev.parent, phys_addr))) { | |
8ec2cd48 | 1446 | mvneta_frag_free(pp, data); |
c5aff182 TP |
1447 | return -ENOMEM; |
1448 | } | |
1449 | ||
8ec2cd48 | 1450 | mvneta_rx_desc_fill(rx_desc, phys_addr, (u32)data); |
c5aff182 TP |
1451 | return 0; |
1452 | } | |
1453 | ||
1454 | /* Handle tx checksum */ | |
1455 | static u32 mvneta_skb_tx_csum(struct mvneta_port *pp, struct sk_buff *skb) | |
1456 | { | |
1457 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
1458 | int ip_hdr_len = 0; | |
817dbfa5 | 1459 | __be16 l3_proto = vlan_get_protocol(skb); |
c5aff182 TP |
1460 | u8 l4_proto; |
1461 | ||
817dbfa5 | 1462 | if (l3_proto == htons(ETH_P_IP)) { |
c5aff182 TP |
1463 | struct iphdr *ip4h = ip_hdr(skb); |
1464 | ||
1465 | /* Calculate IPv4 checksum and L4 checksum */ | |
1466 | ip_hdr_len = ip4h->ihl; | |
1467 | l4_proto = ip4h->protocol; | |
817dbfa5 | 1468 | } else if (l3_proto == htons(ETH_P_IPV6)) { |
c5aff182 TP |
1469 | struct ipv6hdr *ip6h = ipv6_hdr(skb); |
1470 | ||
1471 | /* Read l4_protocol from one of IPv6 extra headers */ | |
1472 | if (skb_network_header_len(skb) > 0) | |
1473 | ip_hdr_len = (skb_network_header_len(skb) >> 2); | |
1474 | l4_proto = ip6h->nexthdr; | |
1475 | } else | |
1476 | return MVNETA_TX_L4_CSUM_NOT; | |
1477 | ||
1478 | return mvneta_txq_desc_csum(skb_network_offset(skb), | |
817dbfa5 | 1479 | l3_proto, ip_hdr_len, l4_proto); |
c5aff182 TP |
1480 | } |
1481 | ||
1482 | return MVNETA_TX_L4_CSUM_NOT; | |
1483 | } | |
1484 | ||
c5aff182 TP |
1485 | /* Drop packets received by the RXQ and free buffers */ |
1486 | static void mvneta_rxq_drop_pkts(struct mvneta_port *pp, | |
1487 | struct mvneta_rx_queue *rxq) | |
1488 | { | |
1489 | int rx_done, i; | |
1490 | ||
1491 | rx_done = mvneta_rxq_busy_desc_num_get(pp, rxq); | |
1492 | for (i = 0; i < rxq->size; i++) { | |
1493 | struct mvneta_rx_desc *rx_desc = rxq->descs + i; | |
8ec2cd48 | 1494 | void *data = (void *)rx_desc->buf_cookie; |
c5aff182 | 1495 | |
c5aff182 | 1496 | dma_unmap_single(pp->dev->dev.parent, rx_desc->buf_phys_addr, |
a328f3a0 | 1497 | MVNETA_RX_BUF_SIZE(pp->pkt_size), DMA_FROM_DEVICE); |
8c94ddbc | 1498 | mvneta_frag_free(pp, data); |
c5aff182 TP |
1499 | } |
1500 | ||
1501 | if (rx_done) | |
1502 | mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_done); | |
1503 | } | |
1504 | ||
1505 | /* Main rx processing */ | |
1506 | static int mvneta_rx(struct mvneta_port *pp, int rx_todo, | |
1507 | struct mvneta_rx_queue *rxq) | |
1508 | { | |
12bb03b4 | 1509 | struct mvneta_pcpu_port *port = this_cpu_ptr(pp->ports); |
c5aff182 | 1510 | struct net_device *dev = pp->dev; |
a84e3289 | 1511 | int rx_done; |
dc4277dd | 1512 | u32 rcvd_pkts = 0; |
1513 | u32 rcvd_bytes = 0; | |
c5aff182 TP |
1514 | |
1515 | /* Get number of received packets */ | |
1516 | rx_done = mvneta_rxq_busy_desc_num_get(pp, rxq); | |
1517 | ||
1518 | if (rx_todo > rx_done) | |
1519 | rx_todo = rx_done; | |
1520 | ||
1521 | rx_done = 0; | |
c5aff182 TP |
1522 | |
1523 | /* Fairness NAPI loop */ | |
1524 | while (rx_done < rx_todo) { | |
1525 | struct mvneta_rx_desc *rx_desc = mvneta_rxq_next_desc_get(rxq); | |
1526 | struct sk_buff *skb; | |
8ec2cd48 | 1527 | unsigned char *data; |
daf158d0 | 1528 | dma_addr_t phys_addr; |
c5aff182 TP |
1529 | u32 rx_status; |
1530 | int rx_bytes, err; | |
1531 | ||
c5aff182 | 1532 | rx_done++; |
c5aff182 | 1533 | rx_status = rx_desc->status; |
f19fadfc | 1534 | rx_bytes = rx_desc->data_size - (ETH_FCS_LEN + MVNETA_MH_SIZE); |
8ec2cd48 | 1535 | data = (unsigned char *)rx_desc->buf_cookie; |
daf158d0 | 1536 | phys_addr = rx_desc->buf_phys_addr; |
c5aff182 | 1537 | |
5428213c | 1538 | if (!mvneta_rxq_desc_is_first_last(rx_status) || |
f19fadfc | 1539 | (rx_status & MVNETA_RXD_ERR_SUMMARY)) { |
1540 | err_drop_frame: | |
c5aff182 TP |
1541 | dev->stats.rx_errors++; |
1542 | mvneta_rx_error(pp, rx_desc); | |
8ec2cd48 | 1543 | /* leave the descriptor untouched */ |
c5aff182 TP |
1544 | continue; |
1545 | } | |
1546 | ||
f19fadfc | 1547 | if (rx_bytes <= rx_copybreak) { |
1548 | /* better copy a small frame and not unmap the DMA region */ | |
1549 | skb = netdev_alloc_skb_ip_align(dev, rx_bytes); | |
1550 | if (unlikely(!skb)) | |
1551 | goto err_drop_frame; | |
1552 | ||
1553 | dma_sync_single_range_for_cpu(dev->dev.parent, | |
1554 | rx_desc->buf_phys_addr, | |
1555 | MVNETA_MH_SIZE + NET_SKB_PAD, | |
1556 | rx_bytes, | |
1557 | DMA_FROM_DEVICE); | |
1558 | memcpy(skb_put(skb, rx_bytes), | |
1559 | data + MVNETA_MH_SIZE + NET_SKB_PAD, | |
1560 | rx_bytes); | |
1561 | ||
1562 | skb->protocol = eth_type_trans(skb, dev); | |
1563 | mvneta_rx_csum(pp, rx_status, skb); | |
12bb03b4 | 1564 | napi_gro_receive(&port->napi, skb); |
f19fadfc | 1565 | |
1566 | rcvd_pkts++; | |
1567 | rcvd_bytes += rx_bytes; | |
1568 | ||
1569 | /* leave the descriptor and buffer untouched */ | |
1570 | continue; | |
1571 | } | |
1572 | ||
a84e3289 SG |
1573 | /* Refill processing */ |
1574 | err = mvneta_rx_refill(pp, rx_desc); | |
1575 | if (err) { | |
1576 | netdev_err(dev, "Linux processing - Can't refill\n"); | |
1577 | rxq->missed++; | |
1578 | goto err_drop_frame; | |
1579 | } | |
1580 | ||
f19fadfc | 1581 | skb = build_skb(data, pp->frag_size > PAGE_SIZE ? 0 : pp->frag_size); |
1582 | if (!skb) | |
1583 | goto err_drop_frame; | |
1584 | ||
daf158d0 | 1585 | dma_unmap_single(dev->dev.parent, phys_addr, |
a328f3a0 | 1586 | MVNETA_RX_BUF_SIZE(pp->pkt_size), DMA_FROM_DEVICE); |
c5aff182 | 1587 | |
dc4277dd | 1588 | rcvd_pkts++; |
1589 | rcvd_bytes += rx_bytes; | |
c5aff182 TP |
1590 | |
1591 | /* Linux processing */ | |
8ec2cd48 | 1592 | skb_reserve(skb, MVNETA_MH_SIZE + NET_SKB_PAD); |
c5aff182 TP |
1593 | skb_put(skb, rx_bytes); |
1594 | ||
1595 | skb->protocol = eth_type_trans(skb, dev); | |
1596 | ||
5428213c | 1597 | mvneta_rx_csum(pp, rx_status, skb); |
c5aff182 | 1598 | |
12bb03b4 | 1599 | napi_gro_receive(&port->napi, skb); |
c5aff182 TP |
1600 | } |
1601 | ||
dc4277dd | 1602 | if (rcvd_pkts) { |
74c41b04 | 1603 | struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats); |
1604 | ||
1605 | u64_stats_update_begin(&stats->syncp); | |
1606 | stats->rx_packets += rcvd_pkts; | |
1607 | stats->rx_bytes += rcvd_bytes; | |
1608 | u64_stats_update_end(&stats->syncp); | |
dc4277dd | 1609 | } |
1610 | ||
c5aff182 | 1611 | /* Update rxq management counters */ |
a84e3289 | 1612 | mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_done); |
c5aff182 TP |
1613 | |
1614 | return rx_done; | |
1615 | } | |
1616 | ||
2adb719d EG |
1617 | static inline void |
1618 | mvneta_tso_put_hdr(struct sk_buff *skb, | |
1619 | struct mvneta_port *pp, struct mvneta_tx_queue *txq) | |
1620 | { | |
1621 | struct mvneta_tx_desc *tx_desc; | |
1622 | int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
1623 | ||
1624 | txq->tx_skb[txq->txq_put_index] = NULL; | |
1625 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1626 | tx_desc->data_size = hdr_len; | |
1627 | tx_desc->command = mvneta_skb_tx_csum(pp, skb); | |
1628 | tx_desc->command |= MVNETA_TXD_F_DESC; | |
1629 | tx_desc->buf_phys_addr = txq->tso_hdrs_phys + | |
1630 | txq->txq_put_index * TSO_HEADER_SIZE; | |
1631 | mvneta_txq_inc_put(txq); | |
1632 | } | |
1633 | ||
1634 | static inline int | |
1635 | mvneta_tso_put_data(struct net_device *dev, struct mvneta_tx_queue *txq, | |
1636 | struct sk_buff *skb, char *data, int size, | |
1637 | bool last_tcp, bool is_last) | |
1638 | { | |
1639 | struct mvneta_tx_desc *tx_desc; | |
1640 | ||
1641 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1642 | tx_desc->data_size = size; | |
1643 | tx_desc->buf_phys_addr = dma_map_single(dev->dev.parent, data, | |
1644 | size, DMA_TO_DEVICE); | |
1645 | if (unlikely(dma_mapping_error(dev->dev.parent, | |
1646 | tx_desc->buf_phys_addr))) { | |
1647 | mvneta_txq_desc_put(txq); | |
1648 | return -ENOMEM; | |
1649 | } | |
1650 | ||
1651 | tx_desc->command = 0; | |
1652 | txq->tx_skb[txq->txq_put_index] = NULL; | |
1653 | ||
1654 | if (last_tcp) { | |
1655 | /* last descriptor in the TCP packet */ | |
1656 | tx_desc->command = MVNETA_TXD_L_DESC; | |
1657 | ||
1658 | /* last descriptor in SKB */ | |
1659 | if (is_last) | |
1660 | txq->tx_skb[txq->txq_put_index] = skb; | |
1661 | } | |
1662 | mvneta_txq_inc_put(txq); | |
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | static int mvneta_tx_tso(struct sk_buff *skb, struct net_device *dev, | |
1667 | struct mvneta_tx_queue *txq) | |
1668 | { | |
1669 | int total_len, data_left; | |
1670 | int desc_count = 0; | |
1671 | struct mvneta_port *pp = netdev_priv(dev); | |
1672 | struct tso_t tso; | |
1673 | int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
1674 | int i; | |
1675 | ||
1676 | /* Count needed descriptors */ | |
1677 | if ((txq->count + tso_count_descs(skb)) >= txq->size) | |
1678 | return 0; | |
1679 | ||
1680 | if (skb_headlen(skb) < (skb_transport_offset(skb) + tcp_hdrlen(skb))) { | |
1681 | pr_info("*** Is this even possible???!?!?\n"); | |
1682 | return 0; | |
1683 | } | |
1684 | ||
1685 | /* Initialize the TSO handler, and prepare the first payload */ | |
1686 | tso_start(skb, &tso); | |
1687 | ||
1688 | total_len = skb->len - hdr_len; | |
1689 | while (total_len > 0) { | |
1690 | char *hdr; | |
1691 | ||
1692 | data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); | |
1693 | total_len -= data_left; | |
1694 | desc_count++; | |
1695 | ||
1696 | /* prepare packet headers: MAC + IP + TCP */ | |
1697 | hdr = txq->tso_hdrs + txq->txq_put_index * TSO_HEADER_SIZE; | |
1698 | tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); | |
1699 | ||
1700 | mvneta_tso_put_hdr(skb, pp, txq); | |
1701 | ||
1702 | while (data_left > 0) { | |
1703 | int size; | |
1704 | desc_count++; | |
1705 | ||
1706 | size = min_t(int, tso.size, data_left); | |
1707 | ||
1708 | if (mvneta_tso_put_data(dev, txq, skb, | |
1709 | tso.data, size, | |
1710 | size == data_left, | |
1711 | total_len == 0)) | |
1712 | goto err_release; | |
1713 | data_left -= size; | |
1714 | ||
1715 | tso_build_data(skb, &tso, size); | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | return desc_count; | |
1720 | ||
1721 | err_release: | |
1722 | /* Release all used data descriptors; header descriptors must not | |
1723 | * be DMA-unmapped. | |
1724 | */ | |
1725 | for (i = desc_count - 1; i >= 0; i--) { | |
1726 | struct mvneta_tx_desc *tx_desc = txq->descs + i; | |
2e3173a3 | 1727 | if (!IS_TSO_HEADER(txq, tx_desc->buf_phys_addr)) |
2adb719d EG |
1728 | dma_unmap_single(pp->dev->dev.parent, |
1729 | tx_desc->buf_phys_addr, | |
1730 | tx_desc->data_size, | |
1731 | DMA_TO_DEVICE); | |
1732 | mvneta_txq_desc_put(txq); | |
1733 | } | |
1734 | return 0; | |
1735 | } | |
1736 | ||
c5aff182 TP |
1737 | /* Handle tx fragmentation processing */ |
1738 | static int mvneta_tx_frag_process(struct mvneta_port *pp, struct sk_buff *skb, | |
1739 | struct mvneta_tx_queue *txq) | |
1740 | { | |
1741 | struct mvneta_tx_desc *tx_desc; | |
3d4ea02f | 1742 | int i, nr_frags = skb_shinfo(skb)->nr_frags; |
c5aff182 | 1743 | |
3d4ea02f | 1744 | for (i = 0; i < nr_frags; i++) { |
c5aff182 TP |
1745 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
1746 | void *addr = page_address(frag->page.p) + frag->page_offset; | |
1747 | ||
1748 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1749 | tx_desc->data_size = frag->size; | |
1750 | ||
1751 | tx_desc->buf_phys_addr = | |
1752 | dma_map_single(pp->dev->dev.parent, addr, | |
1753 | tx_desc->data_size, DMA_TO_DEVICE); | |
1754 | ||
1755 | if (dma_mapping_error(pp->dev->dev.parent, | |
1756 | tx_desc->buf_phys_addr)) { | |
1757 | mvneta_txq_desc_put(txq); | |
1758 | goto error; | |
1759 | } | |
1760 | ||
3d4ea02f | 1761 | if (i == nr_frags - 1) { |
c5aff182 TP |
1762 | /* Last descriptor */ |
1763 | tx_desc->command = MVNETA_TXD_L_DESC | MVNETA_TXD_Z_PAD; | |
c5aff182 | 1764 | txq->tx_skb[txq->txq_put_index] = skb; |
c5aff182 TP |
1765 | } else { |
1766 | /* Descriptor in the middle: Not First, Not Last */ | |
1767 | tx_desc->command = 0; | |
c5aff182 | 1768 | txq->tx_skb[txq->txq_put_index] = NULL; |
c5aff182 | 1769 | } |
3d4ea02f | 1770 | mvneta_txq_inc_put(txq); |
c5aff182 TP |
1771 | } |
1772 | ||
1773 | return 0; | |
1774 | ||
1775 | error: | |
1776 | /* Release all descriptors that were used to map fragments of | |
6a20c175 TP |
1777 | * this packet, as well as the corresponding DMA mappings |
1778 | */ | |
c5aff182 TP |
1779 | for (i = i - 1; i >= 0; i--) { |
1780 | tx_desc = txq->descs + i; | |
1781 | dma_unmap_single(pp->dev->dev.parent, | |
1782 | tx_desc->buf_phys_addr, | |
1783 | tx_desc->data_size, | |
1784 | DMA_TO_DEVICE); | |
1785 | mvneta_txq_desc_put(txq); | |
1786 | } | |
1787 | ||
1788 | return -ENOMEM; | |
1789 | } | |
1790 | ||
1791 | /* Main tx processing */ | |
1792 | static int mvneta_tx(struct sk_buff *skb, struct net_device *dev) | |
1793 | { | |
1794 | struct mvneta_port *pp = netdev_priv(dev); | |
ee40a116 WT |
1795 | u16 txq_id = skb_get_queue_mapping(skb); |
1796 | struct mvneta_tx_queue *txq = &pp->txqs[txq_id]; | |
c5aff182 | 1797 | struct mvneta_tx_desc *tx_desc; |
5f478b41 | 1798 | int len = skb->len; |
c5aff182 TP |
1799 | int frags = 0; |
1800 | u32 tx_cmd; | |
1801 | ||
1802 | if (!netif_running(dev)) | |
1803 | goto out; | |
1804 | ||
2adb719d EG |
1805 | if (skb_is_gso(skb)) { |
1806 | frags = mvneta_tx_tso(skb, dev, txq); | |
1807 | goto out; | |
1808 | } | |
1809 | ||
c5aff182 | 1810 | frags = skb_shinfo(skb)->nr_frags + 1; |
c5aff182 TP |
1811 | |
1812 | /* Get a descriptor for the first part of the packet */ | |
1813 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1814 | ||
1815 | tx_cmd = mvneta_skb_tx_csum(pp, skb); | |
1816 | ||
1817 | tx_desc->data_size = skb_headlen(skb); | |
1818 | ||
1819 | tx_desc->buf_phys_addr = dma_map_single(dev->dev.parent, skb->data, | |
1820 | tx_desc->data_size, | |
1821 | DMA_TO_DEVICE); | |
1822 | if (unlikely(dma_mapping_error(dev->dev.parent, | |
1823 | tx_desc->buf_phys_addr))) { | |
1824 | mvneta_txq_desc_put(txq); | |
1825 | frags = 0; | |
1826 | goto out; | |
1827 | } | |
1828 | ||
1829 | if (frags == 1) { | |
1830 | /* First and Last descriptor */ | |
1831 | tx_cmd |= MVNETA_TXD_FLZ_DESC; | |
1832 | tx_desc->command = tx_cmd; | |
1833 | txq->tx_skb[txq->txq_put_index] = skb; | |
1834 | mvneta_txq_inc_put(txq); | |
1835 | } else { | |
1836 | /* First but not Last */ | |
1837 | tx_cmd |= MVNETA_TXD_F_DESC; | |
1838 | txq->tx_skb[txq->txq_put_index] = NULL; | |
1839 | mvneta_txq_inc_put(txq); | |
1840 | tx_desc->command = tx_cmd; | |
1841 | /* Continue with other skb fragments */ | |
1842 | if (mvneta_tx_frag_process(pp, skb, txq)) { | |
1843 | dma_unmap_single(dev->dev.parent, | |
1844 | tx_desc->buf_phys_addr, | |
1845 | tx_desc->data_size, | |
1846 | DMA_TO_DEVICE); | |
1847 | mvneta_txq_desc_put(txq); | |
1848 | frags = 0; | |
1849 | goto out; | |
1850 | } | |
1851 | } | |
1852 | ||
c5aff182 TP |
1853 | out: |
1854 | if (frags > 0) { | |
74c41b04 | 1855 | struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats); |
e19d2dda EG |
1856 | struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id); |
1857 | ||
1858 | txq->count += frags; | |
1859 | mvneta_txq_pend_desc_add(pp, txq, frags); | |
1860 | ||
8eef5f97 | 1861 | if (txq->count >= txq->tx_stop_threshold) |
e19d2dda | 1862 | netif_tx_stop_queue(nq); |
c5aff182 | 1863 | |
74c41b04 | 1864 | u64_stats_update_begin(&stats->syncp); |
1865 | stats->tx_packets++; | |
5f478b41 | 1866 | stats->tx_bytes += len; |
74c41b04 | 1867 | u64_stats_update_end(&stats->syncp); |
c5aff182 TP |
1868 | } else { |
1869 | dev->stats.tx_dropped++; | |
1870 | dev_kfree_skb_any(skb); | |
1871 | } | |
1872 | ||
c5aff182 TP |
1873 | return NETDEV_TX_OK; |
1874 | } | |
1875 | ||
1876 | ||
1877 | /* Free tx resources, when resetting a port */ | |
1878 | static void mvneta_txq_done_force(struct mvneta_port *pp, | |
1879 | struct mvneta_tx_queue *txq) | |
1880 | ||
1881 | { | |
1882 | int tx_done = txq->count; | |
1883 | ||
1884 | mvneta_txq_bufs_free(pp, txq, tx_done); | |
1885 | ||
1886 | /* reset txq */ | |
1887 | txq->count = 0; | |
1888 | txq->txq_put_index = 0; | |
1889 | txq->txq_get_index = 0; | |
1890 | } | |
1891 | ||
6c498974 | 1892 | /* Handle tx done - called in softirq context. The <cause_tx_done> argument |
1893 | * must be a valid cause according to MVNETA_TXQ_INTR_MASK_ALL. | |
1894 | */ | |
0713a86a | 1895 | static void mvneta_tx_done_gbe(struct mvneta_port *pp, u32 cause_tx_done) |
c5aff182 TP |
1896 | { |
1897 | struct mvneta_tx_queue *txq; | |
c5aff182 TP |
1898 | struct netdev_queue *nq; |
1899 | ||
6c498974 | 1900 | while (cause_tx_done) { |
c5aff182 | 1901 | txq = mvneta_tx_done_policy(pp, cause_tx_done); |
c5aff182 TP |
1902 | |
1903 | nq = netdev_get_tx_queue(pp->dev, txq->id); | |
1904 | __netif_tx_lock(nq, smp_processor_id()); | |
1905 | ||
0713a86a AE |
1906 | if (txq->count) |
1907 | mvneta_txq_done(pp, txq); | |
c5aff182 TP |
1908 | |
1909 | __netif_tx_unlock(nq); | |
1910 | cause_tx_done &= ~((1 << txq->id)); | |
1911 | } | |
c5aff182 TP |
1912 | } |
1913 | ||
6a20c175 | 1914 | /* Compute crc8 of the specified address, using a unique algorithm , |
c5aff182 TP |
1915 | * according to hw spec, different than generic crc8 algorithm |
1916 | */ | |
1917 | static int mvneta_addr_crc(unsigned char *addr) | |
1918 | { | |
1919 | int crc = 0; | |
1920 | int i; | |
1921 | ||
1922 | for (i = 0; i < ETH_ALEN; i++) { | |
1923 | int j; | |
1924 | ||
1925 | crc = (crc ^ addr[i]) << 8; | |
1926 | for (j = 7; j >= 0; j--) { | |
1927 | if (crc & (0x100 << j)) | |
1928 | crc ^= 0x107 << j; | |
1929 | } | |
1930 | } | |
1931 | ||
1932 | return crc; | |
1933 | } | |
1934 | ||
1935 | /* This method controls the net device special MAC multicast support. | |
1936 | * The Special Multicast Table for MAC addresses supports MAC of the form | |
1937 | * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0xFF). | |
1938 | * The MAC DA[7:0] bits are used as a pointer to the Special Multicast | |
1939 | * Table entries in the DA-Filter table. This method set the Special | |
1940 | * Multicast Table appropriate entry. | |
1941 | */ | |
1942 | static void mvneta_set_special_mcast_addr(struct mvneta_port *pp, | |
1943 | unsigned char last_byte, | |
1944 | int queue) | |
1945 | { | |
1946 | unsigned int smc_table_reg; | |
1947 | unsigned int tbl_offset; | |
1948 | unsigned int reg_offset; | |
1949 | ||
1950 | /* Register offset from SMC table base */ | |
1951 | tbl_offset = (last_byte / 4); | |
1952 | /* Entry offset within the above reg */ | |
1953 | reg_offset = last_byte % 4; | |
1954 | ||
1955 | smc_table_reg = mvreg_read(pp, (MVNETA_DA_FILT_SPEC_MCAST | |
1956 | + tbl_offset * 4)); | |
1957 | ||
1958 | if (queue == -1) | |
1959 | smc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1960 | else { | |
1961 | smc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1962 | smc_table_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
1963 | } | |
1964 | ||
1965 | mvreg_write(pp, MVNETA_DA_FILT_SPEC_MCAST + tbl_offset * 4, | |
1966 | smc_table_reg); | |
1967 | } | |
1968 | ||
1969 | /* This method controls the network device Other MAC multicast support. | |
1970 | * The Other Multicast Table is used for multicast of another type. | |
1971 | * A CRC-8 is used as an index to the Other Multicast Table entries | |
1972 | * in the DA-Filter table. | |
1973 | * The method gets the CRC-8 value from the calling routine and | |
1974 | * sets the Other Multicast Table appropriate entry according to the | |
1975 | * specified CRC-8 . | |
1976 | */ | |
1977 | static void mvneta_set_other_mcast_addr(struct mvneta_port *pp, | |
1978 | unsigned char crc8, | |
1979 | int queue) | |
1980 | { | |
1981 | unsigned int omc_table_reg; | |
1982 | unsigned int tbl_offset; | |
1983 | unsigned int reg_offset; | |
1984 | ||
1985 | tbl_offset = (crc8 / 4) * 4; /* Register offset from OMC table base */ | |
1986 | reg_offset = crc8 % 4; /* Entry offset within the above reg */ | |
1987 | ||
1988 | omc_table_reg = mvreg_read(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset); | |
1989 | ||
1990 | if (queue == -1) { | |
1991 | /* Clear accepts frame bit at specified Other DA table entry */ | |
1992 | omc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1993 | } else { | |
1994 | omc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1995 | omc_table_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
1996 | } | |
1997 | ||
1998 | mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset, omc_table_reg); | |
1999 | } | |
2000 | ||
2001 | /* The network device supports multicast using two tables: | |
2002 | * 1) Special Multicast Table for MAC addresses of the form | |
2003 | * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0xFF). | |
2004 | * The MAC DA[7:0] bits are used as a pointer to the Special Multicast | |
2005 | * Table entries in the DA-Filter table. | |
2006 | * 2) Other Multicast Table for multicast of another type. A CRC-8 value | |
2007 | * is used as an index to the Other Multicast Table entries in the | |
2008 | * DA-Filter table. | |
2009 | */ | |
2010 | static int mvneta_mcast_addr_set(struct mvneta_port *pp, unsigned char *p_addr, | |
2011 | int queue) | |
2012 | { | |
2013 | unsigned char crc_result = 0; | |
2014 | ||
2015 | if (memcmp(p_addr, "\x01\x00\x5e\x00\x00", 5) == 0) { | |
2016 | mvneta_set_special_mcast_addr(pp, p_addr[5], queue); | |
2017 | return 0; | |
2018 | } | |
2019 | ||
2020 | crc_result = mvneta_addr_crc(p_addr); | |
2021 | if (queue == -1) { | |
2022 | if (pp->mcast_count[crc_result] == 0) { | |
2023 | netdev_info(pp->dev, "No valid Mcast for crc8=0x%02x\n", | |
2024 | crc_result); | |
2025 | return -EINVAL; | |
2026 | } | |
2027 | ||
2028 | pp->mcast_count[crc_result]--; | |
2029 | if (pp->mcast_count[crc_result] != 0) { | |
2030 | netdev_info(pp->dev, | |
2031 | "After delete there are %d valid Mcast for crc8=0x%02x\n", | |
2032 | pp->mcast_count[crc_result], crc_result); | |
2033 | return -EINVAL; | |
2034 | } | |
2035 | } else | |
2036 | pp->mcast_count[crc_result]++; | |
2037 | ||
2038 | mvneta_set_other_mcast_addr(pp, crc_result, queue); | |
2039 | ||
2040 | return 0; | |
2041 | } | |
2042 | ||
2043 | /* Configure Fitering mode of Ethernet port */ | |
2044 | static void mvneta_rx_unicast_promisc_set(struct mvneta_port *pp, | |
2045 | int is_promisc) | |
2046 | { | |
2047 | u32 port_cfg_reg, val; | |
2048 | ||
2049 | port_cfg_reg = mvreg_read(pp, MVNETA_PORT_CONFIG); | |
2050 | ||
2051 | val = mvreg_read(pp, MVNETA_TYPE_PRIO); | |
2052 | ||
2053 | /* Set / Clear UPM bit in port configuration register */ | |
2054 | if (is_promisc) { | |
2055 | /* Accept all Unicast addresses */ | |
2056 | port_cfg_reg |= MVNETA_UNI_PROMISC_MODE; | |
2057 | val |= MVNETA_FORCE_UNI; | |
2058 | mvreg_write(pp, MVNETA_MAC_ADDR_LOW, 0xffff); | |
2059 | mvreg_write(pp, MVNETA_MAC_ADDR_HIGH, 0xffffffff); | |
2060 | } else { | |
2061 | /* Reject all Unicast addresses */ | |
2062 | port_cfg_reg &= ~MVNETA_UNI_PROMISC_MODE; | |
2063 | val &= ~MVNETA_FORCE_UNI; | |
2064 | } | |
2065 | ||
2066 | mvreg_write(pp, MVNETA_PORT_CONFIG, port_cfg_reg); | |
2067 | mvreg_write(pp, MVNETA_TYPE_PRIO, val); | |
2068 | } | |
2069 | ||
2070 | /* register unicast and multicast addresses */ | |
2071 | static void mvneta_set_rx_mode(struct net_device *dev) | |
2072 | { | |
2073 | struct mvneta_port *pp = netdev_priv(dev); | |
2074 | struct netdev_hw_addr *ha; | |
2075 | ||
2076 | if (dev->flags & IFF_PROMISC) { | |
2077 | /* Accept all: Multicast + Unicast */ | |
2078 | mvneta_rx_unicast_promisc_set(pp, 1); | |
2079 | mvneta_set_ucast_table(pp, rxq_def); | |
2080 | mvneta_set_special_mcast_table(pp, rxq_def); | |
2081 | mvneta_set_other_mcast_table(pp, rxq_def); | |
2082 | } else { | |
2083 | /* Accept single Unicast */ | |
2084 | mvneta_rx_unicast_promisc_set(pp, 0); | |
2085 | mvneta_set_ucast_table(pp, -1); | |
2086 | mvneta_mac_addr_set(pp, dev->dev_addr, rxq_def); | |
2087 | ||
2088 | if (dev->flags & IFF_ALLMULTI) { | |
2089 | /* Accept all multicast */ | |
2090 | mvneta_set_special_mcast_table(pp, rxq_def); | |
2091 | mvneta_set_other_mcast_table(pp, rxq_def); | |
2092 | } else { | |
2093 | /* Accept only initialized multicast */ | |
2094 | mvneta_set_special_mcast_table(pp, -1); | |
2095 | mvneta_set_other_mcast_table(pp, -1); | |
2096 | ||
2097 | if (!netdev_mc_empty(dev)) { | |
2098 | netdev_for_each_mc_addr(ha, dev) { | |
2099 | mvneta_mcast_addr_set(pp, ha->addr, | |
2100 | rxq_def); | |
2101 | } | |
2102 | } | |
2103 | } | |
2104 | } | |
2105 | } | |
2106 | ||
2107 | /* Interrupt handling - the callback for request_irq() */ | |
2108 | static irqreturn_t mvneta_isr(int irq, void *dev_id) | |
2109 | { | |
12bb03b4 | 2110 | struct mvneta_pcpu_port *port = (struct mvneta_pcpu_port *)dev_id; |
c5aff182 | 2111 | |
12bb03b4 | 2112 | disable_percpu_irq(port->pp->dev->irq); |
12bb03b4 | 2113 | napi_schedule(&port->napi); |
c5aff182 TP |
2114 | |
2115 | return IRQ_HANDLED; | |
2116 | } | |
2117 | ||
898b2970 SS |
2118 | static int mvneta_fixed_link_update(struct mvneta_port *pp, |
2119 | struct phy_device *phy) | |
2120 | { | |
2121 | struct fixed_phy_status status; | |
2122 | struct fixed_phy_status changed = {}; | |
2123 | u32 gmac_stat = mvreg_read(pp, MVNETA_GMAC_STATUS); | |
2124 | ||
2125 | status.link = !!(gmac_stat & MVNETA_GMAC_LINK_UP); | |
2126 | if (gmac_stat & MVNETA_GMAC_SPEED_1000) | |
2127 | status.speed = SPEED_1000; | |
2128 | else if (gmac_stat & MVNETA_GMAC_SPEED_100) | |
2129 | status.speed = SPEED_100; | |
2130 | else | |
2131 | status.speed = SPEED_10; | |
2132 | status.duplex = !!(gmac_stat & MVNETA_GMAC_FULL_DUPLEX); | |
2133 | changed.link = 1; | |
2134 | changed.speed = 1; | |
2135 | changed.duplex = 1; | |
2136 | fixed_phy_update_state(phy, &status, &changed); | |
2137 | return 0; | |
2138 | } | |
2139 | ||
c5aff182 TP |
2140 | /* NAPI handler |
2141 | * Bits 0 - 7 of the causeRxTx register indicate that are transmitted | |
2142 | * packets on the corresponding TXQ (Bit 0 is for TX queue 1). | |
2143 | * Bits 8 -15 of the cause Rx Tx register indicate that are received | |
2144 | * packets on the corresponding RXQ (Bit 8 is for RX queue 0). | |
2145 | * Each CPU has its own causeRxTx register | |
2146 | */ | |
2147 | static int mvneta_poll(struct napi_struct *napi, int budget) | |
2148 | { | |
2149 | int rx_done = 0; | |
2150 | u32 cause_rx_tx; | |
c5aff182 | 2151 | struct mvneta_port *pp = netdev_priv(napi->dev); |
12bb03b4 | 2152 | struct mvneta_pcpu_port *port = this_cpu_ptr(pp->ports); |
c5aff182 TP |
2153 | |
2154 | if (!netif_running(pp->dev)) { | |
12bb03b4 | 2155 | napi_complete(&port->napi); |
c5aff182 TP |
2156 | return rx_done; |
2157 | } | |
2158 | ||
2159 | /* Read cause register */ | |
898b2970 SS |
2160 | cause_rx_tx = mvreg_read(pp, MVNETA_INTR_NEW_CAUSE); |
2161 | if (cause_rx_tx & MVNETA_MISCINTR_INTR_MASK) { | |
2162 | u32 cause_misc = mvreg_read(pp, MVNETA_INTR_MISC_CAUSE); | |
2163 | ||
2164 | mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0); | |
2165 | if (pp->use_inband_status && (cause_misc & | |
2166 | (MVNETA_CAUSE_PHY_STATUS_CHANGE | | |
2167 | MVNETA_CAUSE_LINK_CHANGE | | |
2168 | MVNETA_CAUSE_PSC_SYNC_CHANGE))) { | |
2169 | mvneta_fixed_link_update(pp, pp->phy_dev); | |
2170 | } | |
2171 | } | |
71f6d1b3 | 2172 | |
2173 | /* Release Tx descriptors */ | |
2174 | if (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL) { | |
0713a86a | 2175 | mvneta_tx_done_gbe(pp, (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL)); |
71f6d1b3 | 2176 | cause_rx_tx &= ~MVNETA_TX_INTR_MASK_ALL; |
2177 | } | |
c5aff182 | 2178 | |
6a20c175 | 2179 | /* For the case where the last mvneta_poll did not process all |
c5aff182 TP |
2180 | * RX packets |
2181 | */ | |
12bb03b4 | 2182 | cause_rx_tx |= port->cause_rx_tx; |
d8936657 MR |
2183 | rx_done = mvneta_rx(pp, budget, &pp->rxqs[rxq_def]); |
2184 | budget -= rx_done; | |
c5aff182 TP |
2185 | |
2186 | if (budget > 0) { | |
2187 | cause_rx_tx = 0; | |
12bb03b4 MR |
2188 | napi_complete(&port->napi); |
2189 | enable_percpu_irq(pp->dev->irq, 0); | |
c5aff182 TP |
2190 | } |
2191 | ||
12bb03b4 | 2192 | port->cause_rx_tx = cause_rx_tx; |
c5aff182 TP |
2193 | return rx_done; |
2194 | } | |
2195 | ||
c5aff182 TP |
2196 | /* Handle rxq fill: allocates rxq skbs; called when initializing a port */ |
2197 | static int mvneta_rxq_fill(struct mvneta_port *pp, struct mvneta_rx_queue *rxq, | |
2198 | int num) | |
2199 | { | |
c5aff182 TP |
2200 | int i; |
2201 | ||
2202 | for (i = 0; i < num; i++) { | |
a1a65ab1 | 2203 | memset(rxq->descs + i, 0, sizeof(struct mvneta_rx_desc)); |
2204 | if (mvneta_rx_refill(pp, rxq->descs + i) != 0) { | |
2205 | netdev_err(pp->dev, "%s:rxq %d, %d of %d buffs filled\n", | |
c5aff182 TP |
2206 | __func__, rxq->id, i, num); |
2207 | break; | |
2208 | } | |
c5aff182 TP |
2209 | } |
2210 | ||
2211 | /* Add this number of RX descriptors as non occupied (ready to | |
6a20c175 TP |
2212 | * get packets) |
2213 | */ | |
c5aff182 TP |
2214 | mvneta_rxq_non_occup_desc_add(pp, rxq, i); |
2215 | ||
2216 | return i; | |
2217 | } | |
2218 | ||
2219 | /* Free all packets pending transmit from all TXQs and reset TX port */ | |
2220 | static void mvneta_tx_reset(struct mvneta_port *pp) | |
2221 | { | |
2222 | int queue; | |
2223 | ||
9672850b | 2224 | /* free the skb's in the tx ring */ |
c5aff182 TP |
2225 | for (queue = 0; queue < txq_number; queue++) |
2226 | mvneta_txq_done_force(pp, &pp->txqs[queue]); | |
2227 | ||
2228 | mvreg_write(pp, MVNETA_PORT_TX_RESET, MVNETA_PORT_TX_DMA_RESET); | |
2229 | mvreg_write(pp, MVNETA_PORT_TX_RESET, 0); | |
2230 | } | |
2231 | ||
2232 | static void mvneta_rx_reset(struct mvneta_port *pp) | |
2233 | { | |
2234 | mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET); | |
2235 | mvreg_write(pp, MVNETA_PORT_RX_RESET, 0); | |
2236 | } | |
2237 | ||
2238 | /* Rx/Tx queue initialization/cleanup methods */ | |
2239 | ||
2240 | /* Create a specified RX queue */ | |
2241 | static int mvneta_rxq_init(struct mvneta_port *pp, | |
2242 | struct mvneta_rx_queue *rxq) | |
2243 | ||
2244 | { | |
2245 | rxq->size = pp->rx_ring_size; | |
2246 | ||
2247 | /* Allocate memory for RX descriptors */ | |
2248 | rxq->descs = dma_alloc_coherent(pp->dev->dev.parent, | |
2249 | rxq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2250 | &rxq->descs_phys, GFP_KERNEL); | |
d0320f75 | 2251 | if (rxq->descs == NULL) |
c5aff182 | 2252 | return -ENOMEM; |
c5aff182 TP |
2253 | |
2254 | BUG_ON(rxq->descs != | |
2255 | PTR_ALIGN(rxq->descs, MVNETA_CPU_D_CACHE_LINE_SIZE)); | |
2256 | ||
2257 | rxq->last_desc = rxq->size - 1; | |
2258 | ||
2259 | /* Set Rx descriptors queue starting address */ | |
2260 | mvreg_write(pp, MVNETA_RXQ_BASE_ADDR_REG(rxq->id), rxq->descs_phys); | |
2261 | mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), rxq->size); | |
2262 | ||
2263 | /* Set Offset */ | |
2264 | mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD); | |
2265 | ||
2266 | /* Set coalescing pkts and time */ | |
2267 | mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal); | |
2268 | mvneta_rx_time_coal_set(pp, rxq, rxq->time_coal); | |
2269 | ||
2270 | /* Fill RXQ with buffers from RX pool */ | |
2271 | mvneta_rxq_buf_size_set(pp, rxq, MVNETA_RX_BUF_SIZE(pp->pkt_size)); | |
2272 | mvneta_rxq_bm_disable(pp, rxq); | |
2273 | mvneta_rxq_fill(pp, rxq, rxq->size); | |
2274 | ||
2275 | return 0; | |
2276 | } | |
2277 | ||
2278 | /* Cleanup Rx queue */ | |
2279 | static void mvneta_rxq_deinit(struct mvneta_port *pp, | |
2280 | struct mvneta_rx_queue *rxq) | |
2281 | { | |
2282 | mvneta_rxq_drop_pkts(pp, rxq); | |
2283 | ||
2284 | if (rxq->descs) | |
2285 | dma_free_coherent(pp->dev->dev.parent, | |
2286 | rxq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2287 | rxq->descs, | |
2288 | rxq->descs_phys); | |
2289 | ||
2290 | rxq->descs = NULL; | |
2291 | rxq->last_desc = 0; | |
2292 | rxq->next_desc_to_proc = 0; | |
2293 | rxq->descs_phys = 0; | |
2294 | } | |
2295 | ||
2296 | /* Create and initialize a tx queue */ | |
2297 | static int mvneta_txq_init(struct mvneta_port *pp, | |
2298 | struct mvneta_tx_queue *txq) | |
2299 | { | |
2300 | txq->size = pp->tx_ring_size; | |
2301 | ||
8eef5f97 EG |
2302 | /* A queue must always have room for at least one skb. |
2303 | * Therefore, stop the queue when the free entries reaches | |
2304 | * the maximum number of descriptors per skb. | |
2305 | */ | |
2306 | txq->tx_stop_threshold = txq->size - MVNETA_MAX_SKB_DESCS; | |
2307 | txq->tx_wake_threshold = txq->tx_stop_threshold / 2; | |
2308 | ||
2309 | ||
c5aff182 TP |
2310 | /* Allocate memory for TX descriptors */ |
2311 | txq->descs = dma_alloc_coherent(pp->dev->dev.parent, | |
2312 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2313 | &txq->descs_phys, GFP_KERNEL); | |
d0320f75 | 2314 | if (txq->descs == NULL) |
c5aff182 | 2315 | return -ENOMEM; |
c5aff182 TP |
2316 | |
2317 | /* Make sure descriptor address is cache line size aligned */ | |
2318 | BUG_ON(txq->descs != | |
2319 | PTR_ALIGN(txq->descs, MVNETA_CPU_D_CACHE_LINE_SIZE)); | |
2320 | ||
2321 | txq->last_desc = txq->size - 1; | |
2322 | ||
2323 | /* Set maximum bandwidth for enabled TXQs */ | |
2324 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(txq->id), 0x03ffffff); | |
2325 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(txq->id), 0x3fffffff); | |
2326 | ||
2327 | /* Set Tx descriptors queue starting address */ | |
2328 | mvreg_write(pp, MVNETA_TXQ_BASE_ADDR_REG(txq->id), txq->descs_phys); | |
2329 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), txq->size); | |
2330 | ||
2331 | txq->tx_skb = kmalloc(txq->size * sizeof(*txq->tx_skb), GFP_KERNEL); | |
2332 | if (txq->tx_skb == NULL) { | |
2333 | dma_free_coherent(pp->dev->dev.parent, | |
2334 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2335 | txq->descs, txq->descs_phys); | |
2336 | return -ENOMEM; | |
2337 | } | |
2adb719d EG |
2338 | |
2339 | /* Allocate DMA buffers for TSO MAC/IP/TCP headers */ | |
2340 | txq->tso_hdrs = dma_alloc_coherent(pp->dev->dev.parent, | |
2341 | txq->size * TSO_HEADER_SIZE, | |
2342 | &txq->tso_hdrs_phys, GFP_KERNEL); | |
2343 | if (txq->tso_hdrs == NULL) { | |
2344 | kfree(txq->tx_skb); | |
2345 | dma_free_coherent(pp->dev->dev.parent, | |
2346 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2347 | txq->descs, txq->descs_phys); | |
2348 | return -ENOMEM; | |
2349 | } | |
c5aff182 TP |
2350 | mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal); |
2351 | ||
2352 | return 0; | |
2353 | } | |
2354 | ||
2355 | /* Free allocated resources when mvneta_txq_init() fails to allocate memory*/ | |
2356 | static void mvneta_txq_deinit(struct mvneta_port *pp, | |
2357 | struct mvneta_tx_queue *txq) | |
2358 | { | |
2359 | kfree(txq->tx_skb); | |
2360 | ||
2adb719d EG |
2361 | if (txq->tso_hdrs) |
2362 | dma_free_coherent(pp->dev->dev.parent, | |
2363 | txq->size * TSO_HEADER_SIZE, | |
2364 | txq->tso_hdrs, txq->tso_hdrs_phys); | |
c5aff182 TP |
2365 | if (txq->descs) |
2366 | dma_free_coherent(pp->dev->dev.parent, | |
2367 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2368 | txq->descs, txq->descs_phys); | |
2369 | ||
2370 | txq->descs = NULL; | |
2371 | txq->last_desc = 0; | |
2372 | txq->next_desc_to_proc = 0; | |
2373 | txq->descs_phys = 0; | |
2374 | ||
2375 | /* Set minimum bandwidth for disabled TXQs */ | |
2376 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(txq->id), 0); | |
2377 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(txq->id), 0); | |
2378 | ||
2379 | /* Set Tx descriptors queue starting address and size */ | |
2380 | mvreg_write(pp, MVNETA_TXQ_BASE_ADDR_REG(txq->id), 0); | |
2381 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), 0); | |
2382 | } | |
2383 | ||
2384 | /* Cleanup all Tx queues */ | |
2385 | static void mvneta_cleanup_txqs(struct mvneta_port *pp) | |
2386 | { | |
2387 | int queue; | |
2388 | ||
2389 | for (queue = 0; queue < txq_number; queue++) | |
2390 | mvneta_txq_deinit(pp, &pp->txqs[queue]); | |
2391 | } | |
2392 | ||
2393 | /* Cleanup all Rx queues */ | |
2394 | static void mvneta_cleanup_rxqs(struct mvneta_port *pp) | |
2395 | { | |
d8936657 | 2396 | mvneta_rxq_deinit(pp, &pp->rxqs[rxq_def]); |
c5aff182 TP |
2397 | } |
2398 | ||
2399 | ||
2400 | /* Init all Rx queues */ | |
2401 | static int mvneta_setup_rxqs(struct mvneta_port *pp) | |
2402 | { | |
d8936657 MR |
2403 | int err = mvneta_rxq_init(pp, &pp->rxqs[rxq_def]); |
2404 | if (err) { | |
2405 | netdev_err(pp->dev, "%s: can't create rxq=%d\n", | |
2406 | __func__, rxq_def); | |
2407 | mvneta_cleanup_rxqs(pp); | |
2408 | return err; | |
c5aff182 TP |
2409 | } |
2410 | ||
2411 | return 0; | |
2412 | } | |
2413 | ||
2414 | /* Init all tx queues */ | |
2415 | static int mvneta_setup_txqs(struct mvneta_port *pp) | |
2416 | { | |
2417 | int queue; | |
2418 | ||
2419 | for (queue = 0; queue < txq_number; queue++) { | |
2420 | int err = mvneta_txq_init(pp, &pp->txqs[queue]); | |
2421 | if (err) { | |
2422 | netdev_err(pp->dev, "%s: can't create txq=%d\n", | |
2423 | __func__, queue); | |
2424 | mvneta_cleanup_txqs(pp); | |
2425 | return err; | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | return 0; | |
2430 | } | |
2431 | ||
2432 | static void mvneta_start_dev(struct mvneta_port *pp) | |
2433 | { | |
12bb03b4 MR |
2434 | unsigned int cpu; |
2435 | ||
c5aff182 TP |
2436 | mvneta_max_rx_size_set(pp, pp->pkt_size); |
2437 | mvneta_txq_max_tx_size_set(pp, pp->pkt_size); | |
2438 | ||
2439 | /* start the Rx/Tx activity */ | |
2440 | mvneta_port_enable(pp); | |
2441 | ||
2442 | /* Enable polling on the port */ | |
12bb03b4 MR |
2443 | for_each_present_cpu(cpu) { |
2444 | struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu); | |
2445 | ||
2446 | napi_enable(&port->napi); | |
2447 | } | |
c5aff182 TP |
2448 | |
2449 | /* Unmask interrupts */ | |
2450 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, | |
898b2970 SS |
2451 | MVNETA_RX_INTR_MASK(rxq_number) | |
2452 | MVNETA_TX_INTR_MASK(txq_number) | | |
2453 | MVNETA_MISCINTR_INTR_MASK); | |
2454 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, | |
2455 | MVNETA_CAUSE_PHY_STATUS_CHANGE | | |
2456 | MVNETA_CAUSE_LINK_CHANGE | | |
2457 | MVNETA_CAUSE_PSC_SYNC_CHANGE); | |
c5aff182 TP |
2458 | |
2459 | phy_start(pp->phy_dev); | |
2460 | netif_tx_start_all_queues(pp->dev); | |
2461 | } | |
2462 | ||
2463 | static void mvneta_stop_dev(struct mvneta_port *pp) | |
2464 | { | |
12bb03b4 MR |
2465 | unsigned int cpu; |
2466 | ||
c5aff182 TP |
2467 | phy_stop(pp->phy_dev); |
2468 | ||
12bb03b4 MR |
2469 | for_each_present_cpu(cpu) { |
2470 | struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu); | |
2471 | ||
2472 | napi_disable(&port->napi); | |
2473 | } | |
c5aff182 TP |
2474 | |
2475 | netif_carrier_off(pp->dev); | |
2476 | ||
2477 | mvneta_port_down(pp); | |
2478 | netif_tx_stop_all_queues(pp->dev); | |
2479 | ||
2480 | /* Stop the port activity */ | |
2481 | mvneta_port_disable(pp); | |
2482 | ||
2483 | /* Clear all ethernet port interrupts */ | |
2484 | mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0); | |
2485 | mvreg_write(pp, MVNETA_INTR_OLD_CAUSE, 0); | |
2486 | ||
2487 | /* Mask all ethernet port interrupts */ | |
2488 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
2489 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
2490 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
2491 | ||
2492 | mvneta_tx_reset(pp); | |
2493 | mvneta_rx_reset(pp); | |
2494 | } | |
2495 | ||
c5aff182 TP |
2496 | /* Return positive if MTU is valid */ |
2497 | static int mvneta_check_mtu_valid(struct net_device *dev, int mtu) | |
2498 | { | |
2499 | if (mtu < 68) { | |
2500 | netdev_err(dev, "cannot change mtu to less than 68\n"); | |
2501 | return -EINVAL; | |
2502 | } | |
2503 | ||
6a20c175 | 2504 | /* 9676 == 9700 - 20 and rounding to 8 */ |
c5aff182 TP |
2505 | if (mtu > 9676) { |
2506 | netdev_info(dev, "Illegal MTU value %d, round to 9676\n", mtu); | |
2507 | mtu = 9676; | |
2508 | } | |
2509 | ||
2510 | if (!IS_ALIGNED(MVNETA_RX_PKT_SIZE(mtu), 8)) { | |
2511 | netdev_info(dev, "Illegal MTU value %d, rounding to %d\n", | |
2512 | mtu, ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8)); | |
2513 | mtu = ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8); | |
2514 | } | |
2515 | ||
2516 | return mtu; | |
2517 | } | |
2518 | ||
2519 | /* Change the device mtu */ | |
2520 | static int mvneta_change_mtu(struct net_device *dev, int mtu) | |
2521 | { | |
2522 | struct mvneta_port *pp = netdev_priv(dev); | |
2523 | int ret; | |
2524 | ||
2525 | mtu = mvneta_check_mtu_valid(dev, mtu); | |
2526 | if (mtu < 0) | |
2527 | return -EINVAL; | |
2528 | ||
2529 | dev->mtu = mtu; | |
2530 | ||
b65657fc SG |
2531 | if (!netif_running(dev)) { |
2532 | netdev_update_features(dev); | |
c5aff182 | 2533 | return 0; |
b65657fc | 2534 | } |
c5aff182 | 2535 | |
6a20c175 | 2536 | /* The interface is running, so we have to force a |
a92dbd96 | 2537 | * reallocation of the queues |
c5aff182 TP |
2538 | */ |
2539 | mvneta_stop_dev(pp); | |
2540 | ||
2541 | mvneta_cleanup_txqs(pp); | |
2542 | mvneta_cleanup_rxqs(pp); | |
2543 | ||
a92dbd96 | 2544 | pp->pkt_size = MVNETA_RX_PKT_SIZE(dev->mtu); |
8ec2cd48 | 2545 | pp->frag_size = SKB_DATA_ALIGN(MVNETA_RX_BUF_SIZE(pp->pkt_size)) + |
2546 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
c5aff182 TP |
2547 | |
2548 | ret = mvneta_setup_rxqs(pp); | |
2549 | if (ret) { | |
a92dbd96 | 2550 | netdev_err(dev, "unable to setup rxqs after MTU change\n"); |
c5aff182 TP |
2551 | return ret; |
2552 | } | |
2553 | ||
a92dbd96 EG |
2554 | ret = mvneta_setup_txqs(pp); |
2555 | if (ret) { | |
2556 | netdev_err(dev, "unable to setup txqs after MTU change\n"); | |
2557 | return ret; | |
2558 | } | |
c5aff182 TP |
2559 | |
2560 | mvneta_start_dev(pp); | |
2561 | mvneta_port_up(pp); | |
2562 | ||
b65657fc SG |
2563 | netdev_update_features(dev); |
2564 | ||
c5aff182 TP |
2565 | return 0; |
2566 | } | |
2567 | ||
b65657fc SG |
2568 | static netdev_features_t mvneta_fix_features(struct net_device *dev, |
2569 | netdev_features_t features) | |
2570 | { | |
2571 | struct mvneta_port *pp = netdev_priv(dev); | |
2572 | ||
2573 | if (pp->tx_csum_limit && dev->mtu > pp->tx_csum_limit) { | |
2574 | features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO); | |
2575 | netdev_info(dev, | |
2576 | "Disable IP checksum for MTU greater than %dB\n", | |
2577 | pp->tx_csum_limit); | |
2578 | } | |
2579 | ||
2580 | return features; | |
2581 | } | |
2582 | ||
8cc3e439 TP |
2583 | /* Get mac address */ |
2584 | static void mvneta_get_mac_addr(struct mvneta_port *pp, unsigned char *addr) | |
2585 | { | |
2586 | u32 mac_addr_l, mac_addr_h; | |
2587 | ||
2588 | mac_addr_l = mvreg_read(pp, MVNETA_MAC_ADDR_LOW); | |
2589 | mac_addr_h = mvreg_read(pp, MVNETA_MAC_ADDR_HIGH); | |
2590 | addr[0] = (mac_addr_h >> 24) & 0xFF; | |
2591 | addr[1] = (mac_addr_h >> 16) & 0xFF; | |
2592 | addr[2] = (mac_addr_h >> 8) & 0xFF; | |
2593 | addr[3] = mac_addr_h & 0xFF; | |
2594 | addr[4] = (mac_addr_l >> 8) & 0xFF; | |
2595 | addr[5] = mac_addr_l & 0xFF; | |
2596 | } | |
2597 | ||
c5aff182 TP |
2598 | /* Handle setting mac address */ |
2599 | static int mvneta_set_mac_addr(struct net_device *dev, void *addr) | |
2600 | { | |
2601 | struct mvneta_port *pp = netdev_priv(dev); | |
e68de360 EG |
2602 | struct sockaddr *sockaddr = addr; |
2603 | int ret; | |
c5aff182 | 2604 | |
e68de360 EG |
2605 | ret = eth_prepare_mac_addr_change(dev, addr); |
2606 | if (ret < 0) | |
2607 | return ret; | |
c5aff182 TP |
2608 | /* Remove previous address table entry */ |
2609 | mvneta_mac_addr_set(pp, dev->dev_addr, -1); | |
2610 | ||
2611 | /* Set new addr in hw */ | |
e68de360 | 2612 | mvneta_mac_addr_set(pp, sockaddr->sa_data, rxq_def); |
c5aff182 | 2613 | |
e68de360 | 2614 | eth_commit_mac_addr_change(dev, addr); |
c5aff182 TP |
2615 | return 0; |
2616 | } | |
2617 | ||
2618 | static void mvneta_adjust_link(struct net_device *ndev) | |
2619 | { | |
2620 | struct mvneta_port *pp = netdev_priv(ndev); | |
2621 | struct phy_device *phydev = pp->phy_dev; | |
2622 | int status_change = 0; | |
2623 | ||
2624 | if (phydev->link) { | |
2625 | if ((pp->speed != phydev->speed) || | |
2626 | (pp->duplex != phydev->duplex)) { | |
2627 | u32 val; | |
2628 | ||
2629 | val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
2630 | val &= ~(MVNETA_GMAC_CONFIG_MII_SPEED | | |
2631 | MVNETA_GMAC_CONFIG_GMII_SPEED | | |
898b2970 | 2632 | MVNETA_GMAC_CONFIG_FULL_DUPLEX); |
c5aff182 TP |
2633 | |
2634 | if (phydev->duplex) | |
2635 | val |= MVNETA_GMAC_CONFIG_FULL_DUPLEX; | |
2636 | ||
2637 | if (phydev->speed == SPEED_1000) | |
2638 | val |= MVNETA_GMAC_CONFIG_GMII_SPEED; | |
4d12bc63 | 2639 | else if (phydev->speed == SPEED_100) |
c5aff182 TP |
2640 | val |= MVNETA_GMAC_CONFIG_MII_SPEED; |
2641 | ||
2642 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
2643 | ||
2644 | pp->duplex = phydev->duplex; | |
2645 | pp->speed = phydev->speed; | |
2646 | } | |
2647 | } | |
2648 | ||
2649 | if (phydev->link != pp->link) { | |
2650 | if (!phydev->link) { | |
2651 | pp->duplex = -1; | |
2652 | pp->speed = 0; | |
2653 | } | |
2654 | ||
2655 | pp->link = phydev->link; | |
2656 | status_change = 1; | |
2657 | } | |
2658 | ||
2659 | if (status_change) { | |
2660 | if (phydev->link) { | |
898b2970 SS |
2661 | if (!pp->use_inband_status) { |
2662 | u32 val = mvreg_read(pp, | |
2663 | MVNETA_GMAC_AUTONEG_CONFIG); | |
2664 | val &= ~MVNETA_GMAC_FORCE_LINK_DOWN; | |
2665 | val |= MVNETA_GMAC_FORCE_LINK_PASS; | |
2666 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, | |
2667 | val); | |
2668 | } | |
c5aff182 | 2669 | mvneta_port_up(pp); |
c5aff182 | 2670 | } else { |
898b2970 SS |
2671 | if (!pp->use_inband_status) { |
2672 | u32 val = mvreg_read(pp, | |
2673 | MVNETA_GMAC_AUTONEG_CONFIG); | |
2674 | val &= ~MVNETA_GMAC_FORCE_LINK_PASS; | |
2675 | val |= MVNETA_GMAC_FORCE_LINK_DOWN; | |
2676 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, | |
2677 | val); | |
2678 | } | |
c5aff182 | 2679 | mvneta_port_down(pp); |
c5aff182 | 2680 | } |
0089b745 | 2681 | phy_print_status(phydev); |
c5aff182 TP |
2682 | } |
2683 | } | |
2684 | ||
2685 | static int mvneta_mdio_probe(struct mvneta_port *pp) | |
2686 | { | |
2687 | struct phy_device *phy_dev; | |
2688 | ||
2689 | phy_dev = of_phy_connect(pp->dev, pp->phy_node, mvneta_adjust_link, 0, | |
2690 | pp->phy_interface); | |
2691 | if (!phy_dev) { | |
2692 | netdev_err(pp->dev, "could not find the PHY\n"); | |
2693 | return -ENODEV; | |
2694 | } | |
2695 | ||
2696 | phy_dev->supported &= PHY_GBIT_FEATURES; | |
2697 | phy_dev->advertising = phy_dev->supported; | |
2698 | ||
2699 | pp->phy_dev = phy_dev; | |
2700 | pp->link = 0; | |
2701 | pp->duplex = 0; | |
2702 | pp->speed = 0; | |
2703 | ||
2704 | return 0; | |
2705 | } | |
2706 | ||
2707 | static void mvneta_mdio_remove(struct mvneta_port *pp) | |
2708 | { | |
2709 | phy_disconnect(pp->phy_dev); | |
2710 | pp->phy_dev = NULL; | |
2711 | } | |
2712 | ||
f8642885 MR |
2713 | static void mvneta_percpu_enable(void *arg) |
2714 | { | |
2715 | struct mvneta_port *pp = arg; | |
2716 | ||
2717 | enable_percpu_irq(pp->dev->irq, IRQ_TYPE_NONE); | |
2718 | } | |
2719 | ||
2720 | static void mvneta_percpu_disable(void *arg) | |
2721 | { | |
2722 | struct mvneta_port *pp = arg; | |
2723 | ||
2724 | disable_percpu_irq(pp->dev->irq); | |
2725 | } | |
2726 | ||
2727 | static void mvneta_percpu_elect(struct mvneta_port *pp) | |
2728 | { | |
2729 | int online_cpu_idx, cpu, i = 0; | |
2730 | ||
2731 | online_cpu_idx = rxq_def % num_online_cpus(); | |
2732 | ||
2733 | for_each_online_cpu(cpu) { | |
2734 | if (i == online_cpu_idx) | |
2735 | /* Enable per-CPU interrupt on the one CPU we | |
2736 | * just elected | |
2737 | */ | |
2738 | smp_call_function_single(cpu, mvneta_percpu_enable, | |
2739 | pp, true); | |
2740 | else | |
2741 | /* Disable per-CPU interrupt on all the other CPU */ | |
2742 | smp_call_function_single(cpu, mvneta_percpu_disable, | |
2743 | pp, true); | |
2744 | i++; | |
2745 | } | |
2746 | }; | |
2747 | ||
2748 | static int mvneta_percpu_notifier(struct notifier_block *nfb, | |
2749 | unsigned long action, void *hcpu) | |
2750 | { | |
2751 | struct mvneta_port *pp = container_of(nfb, struct mvneta_port, | |
2752 | cpu_notifier); | |
2753 | int cpu = (unsigned long)hcpu, other_cpu; | |
2754 | struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu); | |
2755 | ||
2756 | switch (action) { | |
2757 | case CPU_ONLINE: | |
2758 | case CPU_ONLINE_FROZEN: | |
2759 | netif_tx_stop_all_queues(pp->dev); | |
2760 | ||
2761 | /* We have to synchronise on tha napi of each CPU | |
2762 | * except the one just being waked up | |
2763 | */ | |
2764 | for_each_online_cpu(other_cpu) { | |
2765 | if (other_cpu != cpu) { | |
2766 | struct mvneta_pcpu_port *other_port = | |
2767 | per_cpu_ptr(pp->ports, other_cpu); | |
2768 | ||
2769 | napi_synchronize(&other_port->napi); | |
2770 | } | |
2771 | } | |
2772 | ||
2773 | /* Mask all ethernet port interrupts */ | |
2774 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
2775 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
2776 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
2777 | napi_enable(&port->napi); | |
2778 | ||
2779 | /* Enable per-CPU interrupt on the one CPU we care | |
2780 | * about. | |
2781 | */ | |
2782 | mvneta_percpu_elect(pp); | |
2783 | ||
2784 | /* Unmask all ethernet port interrupts */ | |
2785 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, | |
2786 | MVNETA_RX_INTR_MASK(rxq_number) | | |
2787 | MVNETA_TX_INTR_MASK(txq_number) | | |
2788 | MVNETA_MISCINTR_INTR_MASK); | |
2789 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, | |
2790 | MVNETA_CAUSE_PHY_STATUS_CHANGE | | |
2791 | MVNETA_CAUSE_LINK_CHANGE | | |
2792 | MVNETA_CAUSE_PSC_SYNC_CHANGE); | |
2793 | netif_tx_start_all_queues(pp->dev); | |
2794 | break; | |
2795 | case CPU_DOWN_PREPARE: | |
2796 | case CPU_DOWN_PREPARE_FROZEN: | |
2797 | netif_tx_stop_all_queues(pp->dev); | |
2798 | /* Mask all ethernet port interrupts */ | |
2799 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
2800 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
2801 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
2802 | ||
2803 | napi_synchronize(&port->napi); | |
2804 | napi_disable(&port->napi); | |
2805 | /* Disable per-CPU interrupts on the CPU that is | |
2806 | * brought down. | |
2807 | */ | |
2808 | smp_call_function_single(cpu, mvneta_percpu_disable, | |
2809 | pp, true); | |
2810 | ||
2811 | break; | |
2812 | case CPU_DEAD: | |
2813 | case CPU_DEAD_FROZEN: | |
2814 | /* Check if a new CPU must be elected now this on is down */ | |
2815 | mvneta_percpu_elect(pp); | |
2816 | /* Unmask all ethernet port interrupts */ | |
2817 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, | |
2818 | MVNETA_RX_INTR_MASK(rxq_number) | | |
2819 | MVNETA_TX_INTR_MASK(txq_number) | | |
2820 | MVNETA_MISCINTR_INTR_MASK); | |
2821 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, | |
2822 | MVNETA_CAUSE_PHY_STATUS_CHANGE | | |
2823 | MVNETA_CAUSE_LINK_CHANGE | | |
2824 | MVNETA_CAUSE_PSC_SYNC_CHANGE); | |
2825 | netif_tx_start_all_queues(pp->dev); | |
2826 | break; | |
2827 | } | |
2828 | ||
2829 | return NOTIFY_OK; | |
2830 | } | |
2831 | ||
c5aff182 TP |
2832 | static int mvneta_open(struct net_device *dev) |
2833 | { | |
2834 | struct mvneta_port *pp = netdev_priv(dev); | |
2835 | int ret; | |
2836 | ||
c5aff182 | 2837 | pp->pkt_size = MVNETA_RX_PKT_SIZE(pp->dev->mtu); |
8ec2cd48 | 2838 | pp->frag_size = SKB_DATA_ALIGN(MVNETA_RX_BUF_SIZE(pp->pkt_size)) + |
2839 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
c5aff182 TP |
2840 | |
2841 | ret = mvneta_setup_rxqs(pp); | |
2842 | if (ret) | |
2843 | return ret; | |
2844 | ||
2845 | ret = mvneta_setup_txqs(pp); | |
2846 | if (ret) | |
2847 | goto err_cleanup_rxqs; | |
2848 | ||
2849 | /* Connect to port interrupt line */ | |
12bb03b4 MR |
2850 | ret = request_percpu_irq(pp->dev->irq, mvneta_isr, |
2851 | MVNETA_DRIVER_NAME, pp->ports); | |
c5aff182 TP |
2852 | if (ret) { |
2853 | netdev_err(pp->dev, "cannot request irq %d\n", pp->dev->irq); | |
2854 | goto err_cleanup_txqs; | |
2855 | } | |
2856 | ||
f8642885 MR |
2857 | /* Even though the documentation says that request_percpu_irq |
2858 | * doesn't enable the interrupts automatically, it actually | |
2859 | * does so on the local CPU. | |
2860 | * | |
2861 | * Make sure it's disabled. | |
2862 | */ | |
2863 | mvneta_percpu_disable(pp); | |
2864 | ||
2865 | /* Elect a CPU to handle our RX queue interrupt */ | |
2866 | mvneta_percpu_elect(pp); | |
2867 | ||
2868 | /* Register a CPU notifier to handle the case where our CPU | |
2869 | * might be taken offline. | |
2870 | */ | |
2871 | register_cpu_notifier(&pp->cpu_notifier); | |
2872 | ||
c5aff182 TP |
2873 | /* In default link is down */ |
2874 | netif_carrier_off(pp->dev); | |
2875 | ||
2876 | ret = mvneta_mdio_probe(pp); | |
2877 | if (ret < 0) { | |
2878 | netdev_err(dev, "cannot probe MDIO bus\n"); | |
2879 | goto err_free_irq; | |
2880 | } | |
2881 | ||
2882 | mvneta_start_dev(pp); | |
2883 | ||
2884 | return 0; | |
2885 | ||
2886 | err_free_irq: | |
12bb03b4 | 2887 | free_percpu_irq(pp->dev->irq, pp->ports); |
c5aff182 TP |
2888 | err_cleanup_txqs: |
2889 | mvneta_cleanup_txqs(pp); | |
2890 | err_cleanup_rxqs: | |
2891 | mvneta_cleanup_rxqs(pp); | |
2892 | return ret; | |
2893 | } | |
2894 | ||
2895 | /* Stop the port, free port interrupt line */ | |
2896 | static int mvneta_stop(struct net_device *dev) | |
2897 | { | |
2898 | struct mvneta_port *pp = netdev_priv(dev); | |
f8642885 | 2899 | int cpu; |
c5aff182 TP |
2900 | |
2901 | mvneta_stop_dev(pp); | |
2902 | mvneta_mdio_remove(pp); | |
f8642885 MR |
2903 | unregister_cpu_notifier(&pp->cpu_notifier); |
2904 | for_each_present_cpu(cpu) | |
2905 | smp_call_function_single(cpu, mvneta_percpu_disable, pp, true); | |
12bb03b4 | 2906 | free_percpu_irq(dev->irq, pp->ports); |
c5aff182 TP |
2907 | mvneta_cleanup_rxqs(pp); |
2908 | mvneta_cleanup_txqs(pp); | |
c5aff182 TP |
2909 | |
2910 | return 0; | |
2911 | } | |
2912 | ||
15f59456 TP |
2913 | static int mvneta_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
2914 | { | |
2915 | struct mvneta_port *pp = netdev_priv(dev); | |
15f59456 TP |
2916 | |
2917 | if (!pp->phy_dev) | |
2918 | return -ENOTSUPP; | |
2919 | ||
ecf7b361 | 2920 | return phy_mii_ioctl(pp->phy_dev, ifr, cmd); |
15f59456 TP |
2921 | } |
2922 | ||
c5aff182 TP |
2923 | /* Ethtool methods */ |
2924 | ||
2925 | /* Get settings (phy address, speed) for ethtools */ | |
2926 | int mvneta_ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
2927 | { | |
2928 | struct mvneta_port *pp = netdev_priv(dev); | |
2929 | ||
2930 | if (!pp->phy_dev) | |
2931 | return -ENODEV; | |
2932 | ||
2933 | return phy_ethtool_gset(pp->phy_dev, cmd); | |
2934 | } | |
2935 | ||
2936 | /* Set settings (phy address, speed) for ethtools */ | |
2937 | int mvneta_ethtool_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
2938 | { | |
2939 | struct mvneta_port *pp = netdev_priv(dev); | |
2940 | ||
2941 | if (!pp->phy_dev) | |
2942 | return -ENODEV; | |
2943 | ||
2944 | return phy_ethtool_sset(pp->phy_dev, cmd); | |
2945 | } | |
2946 | ||
2947 | /* Set interrupt coalescing for ethtools */ | |
2948 | static int mvneta_ethtool_set_coalesce(struct net_device *dev, | |
2949 | struct ethtool_coalesce *c) | |
2950 | { | |
2951 | struct mvneta_port *pp = netdev_priv(dev); | |
2952 | int queue; | |
2953 | ||
2954 | for (queue = 0; queue < rxq_number; queue++) { | |
2955 | struct mvneta_rx_queue *rxq = &pp->rxqs[queue]; | |
2956 | rxq->time_coal = c->rx_coalesce_usecs; | |
2957 | rxq->pkts_coal = c->rx_max_coalesced_frames; | |
2958 | mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal); | |
2959 | mvneta_rx_time_coal_set(pp, rxq, rxq->time_coal); | |
2960 | } | |
2961 | ||
2962 | for (queue = 0; queue < txq_number; queue++) { | |
2963 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
2964 | txq->done_pkts_coal = c->tx_max_coalesced_frames; | |
2965 | mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal); | |
2966 | } | |
2967 | ||
2968 | return 0; | |
2969 | } | |
2970 | ||
2971 | /* get coalescing for ethtools */ | |
2972 | static int mvneta_ethtool_get_coalesce(struct net_device *dev, | |
2973 | struct ethtool_coalesce *c) | |
2974 | { | |
2975 | struct mvneta_port *pp = netdev_priv(dev); | |
2976 | ||
2977 | c->rx_coalesce_usecs = pp->rxqs[0].time_coal; | |
2978 | c->rx_max_coalesced_frames = pp->rxqs[0].pkts_coal; | |
2979 | ||
2980 | c->tx_max_coalesced_frames = pp->txqs[0].done_pkts_coal; | |
2981 | return 0; | |
2982 | } | |
2983 | ||
2984 | ||
2985 | static void mvneta_ethtool_get_drvinfo(struct net_device *dev, | |
2986 | struct ethtool_drvinfo *drvinfo) | |
2987 | { | |
2988 | strlcpy(drvinfo->driver, MVNETA_DRIVER_NAME, | |
2989 | sizeof(drvinfo->driver)); | |
2990 | strlcpy(drvinfo->version, MVNETA_DRIVER_VERSION, | |
2991 | sizeof(drvinfo->version)); | |
2992 | strlcpy(drvinfo->bus_info, dev_name(&dev->dev), | |
2993 | sizeof(drvinfo->bus_info)); | |
2994 | } | |
2995 | ||
2996 | ||
2997 | static void mvneta_ethtool_get_ringparam(struct net_device *netdev, | |
2998 | struct ethtool_ringparam *ring) | |
2999 | { | |
3000 | struct mvneta_port *pp = netdev_priv(netdev); | |
3001 | ||
3002 | ring->rx_max_pending = MVNETA_MAX_RXD; | |
3003 | ring->tx_max_pending = MVNETA_MAX_TXD; | |
3004 | ring->rx_pending = pp->rx_ring_size; | |
3005 | ring->tx_pending = pp->tx_ring_size; | |
3006 | } | |
3007 | ||
3008 | static int mvneta_ethtool_set_ringparam(struct net_device *dev, | |
3009 | struct ethtool_ringparam *ring) | |
3010 | { | |
3011 | struct mvneta_port *pp = netdev_priv(dev); | |
3012 | ||
3013 | if ((ring->rx_pending == 0) || (ring->tx_pending == 0)) | |
3014 | return -EINVAL; | |
3015 | pp->rx_ring_size = ring->rx_pending < MVNETA_MAX_RXD ? | |
3016 | ring->rx_pending : MVNETA_MAX_RXD; | |
8eef5f97 EG |
3017 | |
3018 | pp->tx_ring_size = clamp_t(u16, ring->tx_pending, | |
3019 | MVNETA_MAX_SKB_DESCS * 2, MVNETA_MAX_TXD); | |
3020 | if (pp->tx_ring_size != ring->tx_pending) | |
3021 | netdev_warn(dev, "TX queue size set to %u (requested %u)\n", | |
3022 | pp->tx_ring_size, ring->tx_pending); | |
c5aff182 TP |
3023 | |
3024 | if (netif_running(dev)) { | |
3025 | mvneta_stop(dev); | |
3026 | if (mvneta_open(dev)) { | |
3027 | netdev_err(dev, | |
3028 | "error on opening device after ring param change\n"); | |
3029 | return -ENOMEM; | |
3030 | } | |
3031 | } | |
3032 | ||
3033 | return 0; | |
3034 | } | |
3035 | ||
9b0cdefa RK |
3036 | static void mvneta_ethtool_get_strings(struct net_device *netdev, u32 sset, |
3037 | u8 *data) | |
3038 | { | |
3039 | if (sset == ETH_SS_STATS) { | |
3040 | int i; | |
3041 | ||
3042 | for (i = 0; i < ARRAY_SIZE(mvneta_statistics); i++) | |
3043 | memcpy(data + i * ETH_GSTRING_LEN, | |
3044 | mvneta_statistics[i].name, ETH_GSTRING_LEN); | |
3045 | } | |
3046 | } | |
3047 | ||
3048 | static void mvneta_ethtool_update_stats(struct mvneta_port *pp) | |
3049 | { | |
3050 | const struct mvneta_statistic *s; | |
3051 | void __iomem *base = pp->base; | |
3052 | u32 high, low, val; | |
3053 | int i; | |
3054 | ||
3055 | for (i = 0, s = mvneta_statistics; | |
3056 | s < mvneta_statistics + ARRAY_SIZE(mvneta_statistics); | |
3057 | s++, i++) { | |
3058 | val = 0; | |
3059 | ||
3060 | switch (s->type) { | |
3061 | case T_REG_32: | |
3062 | val = readl_relaxed(base + s->offset); | |
3063 | break; | |
3064 | case T_REG_64: | |
3065 | /* Docs say to read low 32-bit then high */ | |
3066 | low = readl_relaxed(base + s->offset); | |
3067 | high = readl_relaxed(base + s->offset + 4); | |
3068 | val = (u64)high << 32 | low; | |
3069 | break; | |
3070 | } | |
3071 | ||
3072 | pp->ethtool_stats[i] += val; | |
3073 | } | |
3074 | } | |
3075 | ||
3076 | static void mvneta_ethtool_get_stats(struct net_device *dev, | |
3077 | struct ethtool_stats *stats, u64 *data) | |
3078 | { | |
3079 | struct mvneta_port *pp = netdev_priv(dev); | |
3080 | int i; | |
3081 | ||
3082 | mvneta_ethtool_update_stats(pp); | |
3083 | ||
3084 | for (i = 0; i < ARRAY_SIZE(mvneta_statistics); i++) | |
3085 | *data++ = pp->ethtool_stats[i]; | |
3086 | } | |
3087 | ||
3088 | static int mvneta_ethtool_get_sset_count(struct net_device *dev, int sset) | |
3089 | { | |
3090 | if (sset == ETH_SS_STATS) | |
3091 | return ARRAY_SIZE(mvneta_statistics); | |
3092 | return -EOPNOTSUPP; | |
3093 | } | |
3094 | ||
c5aff182 TP |
3095 | static const struct net_device_ops mvneta_netdev_ops = { |
3096 | .ndo_open = mvneta_open, | |
3097 | .ndo_stop = mvneta_stop, | |
3098 | .ndo_start_xmit = mvneta_tx, | |
3099 | .ndo_set_rx_mode = mvneta_set_rx_mode, | |
3100 | .ndo_set_mac_address = mvneta_set_mac_addr, | |
3101 | .ndo_change_mtu = mvneta_change_mtu, | |
b65657fc | 3102 | .ndo_fix_features = mvneta_fix_features, |
c5aff182 | 3103 | .ndo_get_stats64 = mvneta_get_stats64, |
15f59456 | 3104 | .ndo_do_ioctl = mvneta_ioctl, |
c5aff182 TP |
3105 | }; |
3106 | ||
3107 | const struct ethtool_ops mvneta_eth_tool_ops = { | |
3108 | .get_link = ethtool_op_get_link, | |
3109 | .get_settings = mvneta_ethtool_get_settings, | |
3110 | .set_settings = mvneta_ethtool_set_settings, | |
3111 | .set_coalesce = mvneta_ethtool_set_coalesce, | |
3112 | .get_coalesce = mvneta_ethtool_get_coalesce, | |
3113 | .get_drvinfo = mvneta_ethtool_get_drvinfo, | |
3114 | .get_ringparam = mvneta_ethtool_get_ringparam, | |
3115 | .set_ringparam = mvneta_ethtool_set_ringparam, | |
9b0cdefa RK |
3116 | .get_strings = mvneta_ethtool_get_strings, |
3117 | .get_ethtool_stats = mvneta_ethtool_get_stats, | |
3118 | .get_sset_count = mvneta_ethtool_get_sset_count, | |
c5aff182 TP |
3119 | }; |
3120 | ||
3121 | /* Initialize hw */ | |
9672850b | 3122 | static int mvneta_init(struct device *dev, struct mvneta_port *pp) |
c5aff182 TP |
3123 | { |
3124 | int queue; | |
3125 | ||
3126 | /* Disable port */ | |
3127 | mvneta_port_disable(pp); | |
3128 | ||
3129 | /* Set port default values */ | |
3130 | mvneta_defaults_set(pp); | |
3131 | ||
9672850b EG |
3132 | pp->txqs = devm_kcalloc(dev, txq_number, sizeof(struct mvneta_tx_queue), |
3133 | GFP_KERNEL); | |
c5aff182 TP |
3134 | if (!pp->txqs) |
3135 | return -ENOMEM; | |
3136 | ||
3137 | /* Initialize TX descriptor rings */ | |
3138 | for (queue = 0; queue < txq_number; queue++) { | |
3139 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
3140 | txq->id = queue; | |
3141 | txq->size = pp->tx_ring_size; | |
3142 | txq->done_pkts_coal = MVNETA_TXDONE_COAL_PKTS; | |
3143 | } | |
3144 | ||
9672850b EG |
3145 | pp->rxqs = devm_kcalloc(dev, rxq_number, sizeof(struct mvneta_rx_queue), |
3146 | GFP_KERNEL); | |
3147 | if (!pp->rxqs) | |
c5aff182 | 3148 | return -ENOMEM; |
c5aff182 TP |
3149 | |
3150 | /* Create Rx descriptor rings */ | |
3151 | for (queue = 0; queue < rxq_number; queue++) { | |
3152 | struct mvneta_rx_queue *rxq = &pp->rxqs[queue]; | |
3153 | rxq->id = queue; | |
3154 | rxq->size = pp->rx_ring_size; | |
3155 | rxq->pkts_coal = MVNETA_RX_COAL_PKTS; | |
3156 | rxq->time_coal = MVNETA_RX_COAL_USEC; | |
3157 | } | |
3158 | ||
3159 | return 0; | |
3160 | } | |
3161 | ||
c5aff182 | 3162 | /* platform glue : initialize decoding windows */ |
03ce758e GK |
3163 | static void mvneta_conf_mbus_windows(struct mvneta_port *pp, |
3164 | const struct mbus_dram_target_info *dram) | |
c5aff182 TP |
3165 | { |
3166 | u32 win_enable; | |
3167 | u32 win_protect; | |
3168 | int i; | |
3169 | ||
3170 | for (i = 0; i < 6; i++) { | |
3171 | mvreg_write(pp, MVNETA_WIN_BASE(i), 0); | |
3172 | mvreg_write(pp, MVNETA_WIN_SIZE(i), 0); | |
3173 | ||
3174 | if (i < 4) | |
3175 | mvreg_write(pp, MVNETA_WIN_REMAP(i), 0); | |
3176 | } | |
3177 | ||
3178 | win_enable = 0x3f; | |
3179 | win_protect = 0; | |
3180 | ||
3181 | for (i = 0; i < dram->num_cs; i++) { | |
3182 | const struct mbus_dram_window *cs = dram->cs + i; | |
3183 | mvreg_write(pp, MVNETA_WIN_BASE(i), (cs->base & 0xffff0000) | | |
3184 | (cs->mbus_attr << 8) | dram->mbus_dram_target_id); | |
3185 | ||
3186 | mvreg_write(pp, MVNETA_WIN_SIZE(i), | |
3187 | (cs->size - 1) & 0xffff0000); | |
3188 | ||
3189 | win_enable &= ~(1 << i); | |
3190 | win_protect |= 3 << (2 * i); | |
3191 | } | |
3192 | ||
3193 | mvreg_write(pp, MVNETA_BASE_ADDR_ENABLE, win_enable); | |
3194 | } | |
3195 | ||
3196 | /* Power up the port */ | |
3f1dd4bc | 3197 | static int mvneta_port_power_up(struct mvneta_port *pp, int phy_mode) |
c5aff182 | 3198 | { |
3f1dd4bc | 3199 | u32 ctrl; |
c5aff182 TP |
3200 | |
3201 | /* MAC Cause register should be cleared */ | |
3202 | mvreg_write(pp, MVNETA_UNIT_INTR_CAUSE, 0); | |
3203 | ||
3f1dd4bc | 3204 | ctrl = mvreg_read(pp, MVNETA_GMAC_CTRL_2); |
c5aff182 | 3205 | |
3f1dd4bc TP |
3206 | /* Even though it might look weird, when we're configured in |
3207 | * SGMII or QSGMII mode, the RGMII bit needs to be set. | |
3208 | */ | |
3209 | switch(phy_mode) { | |
3210 | case PHY_INTERFACE_MODE_QSGMII: | |
3211 | mvreg_write(pp, MVNETA_SERDES_CFG, MVNETA_QSGMII_SERDES_PROTO); | |
3212 | ctrl |= MVNETA_GMAC2_PCS_ENABLE | MVNETA_GMAC2_PORT_RGMII; | |
3213 | break; | |
3214 | case PHY_INTERFACE_MODE_SGMII: | |
3215 | mvreg_write(pp, MVNETA_SERDES_CFG, MVNETA_SGMII_SERDES_PROTO); | |
3216 | ctrl |= MVNETA_GMAC2_PCS_ENABLE | MVNETA_GMAC2_PORT_RGMII; | |
3217 | break; | |
3218 | case PHY_INTERFACE_MODE_RGMII: | |
3219 | case PHY_INTERFACE_MODE_RGMII_ID: | |
3220 | ctrl |= MVNETA_GMAC2_PORT_RGMII; | |
3221 | break; | |
3222 | default: | |
3223 | return -EINVAL; | |
3224 | } | |
c5aff182 | 3225 | |
898b2970 SS |
3226 | if (pp->use_inband_status) |
3227 | ctrl |= MVNETA_GMAC2_INBAND_AN_ENABLE; | |
3228 | ||
c5aff182 | 3229 | /* Cancel Port Reset */ |
3f1dd4bc TP |
3230 | ctrl &= ~MVNETA_GMAC2_PORT_RESET; |
3231 | mvreg_write(pp, MVNETA_GMAC_CTRL_2, ctrl); | |
c5aff182 TP |
3232 | |
3233 | while ((mvreg_read(pp, MVNETA_GMAC_CTRL_2) & | |
3234 | MVNETA_GMAC2_PORT_RESET) != 0) | |
3235 | continue; | |
3f1dd4bc TP |
3236 | |
3237 | return 0; | |
c5aff182 TP |
3238 | } |
3239 | ||
3240 | /* Device initialization routine */ | |
03ce758e | 3241 | static int mvneta_probe(struct platform_device *pdev) |
c5aff182 TP |
3242 | { |
3243 | const struct mbus_dram_target_info *dram_target_info; | |
c3f0dd38 | 3244 | struct resource *res; |
c5aff182 TP |
3245 | struct device_node *dn = pdev->dev.of_node; |
3246 | struct device_node *phy_node; | |
c5aff182 TP |
3247 | struct mvneta_port *pp; |
3248 | struct net_device *dev; | |
8cc3e439 TP |
3249 | const char *dt_mac_addr; |
3250 | char hw_mac_addr[ETH_ALEN]; | |
3251 | const char *mac_from; | |
f8af8e6e | 3252 | const char *managed; |
c5aff182 TP |
3253 | int phy_mode; |
3254 | int err; | |
12bb03b4 | 3255 | int cpu; |
c5aff182 | 3256 | |
ee40a116 | 3257 | dev = alloc_etherdev_mqs(sizeof(struct mvneta_port), txq_number, rxq_number); |
c5aff182 TP |
3258 | if (!dev) |
3259 | return -ENOMEM; | |
3260 | ||
3261 | dev->irq = irq_of_parse_and_map(dn, 0); | |
3262 | if (dev->irq == 0) { | |
3263 | err = -EINVAL; | |
3264 | goto err_free_netdev; | |
3265 | } | |
3266 | ||
3267 | phy_node = of_parse_phandle(dn, "phy", 0); | |
3268 | if (!phy_node) { | |
83895bed TP |
3269 | if (!of_phy_is_fixed_link(dn)) { |
3270 | dev_err(&pdev->dev, "no PHY specified\n"); | |
3271 | err = -ENODEV; | |
3272 | goto err_free_irq; | |
3273 | } | |
3274 | ||
3275 | err = of_phy_register_fixed_link(dn); | |
3276 | if (err < 0) { | |
3277 | dev_err(&pdev->dev, "cannot register fixed PHY\n"); | |
3278 | goto err_free_irq; | |
3279 | } | |
3280 | ||
3281 | /* In the case of a fixed PHY, the DT node associated | |
3282 | * to the PHY is the Ethernet MAC DT node. | |
3283 | */ | |
c891c24c | 3284 | phy_node = of_node_get(dn); |
c5aff182 TP |
3285 | } |
3286 | ||
3287 | phy_mode = of_get_phy_mode(dn); | |
3288 | if (phy_mode < 0) { | |
3289 | dev_err(&pdev->dev, "incorrect phy-mode\n"); | |
3290 | err = -EINVAL; | |
c891c24c | 3291 | goto err_put_phy_node; |
c5aff182 TP |
3292 | } |
3293 | ||
c5aff182 TP |
3294 | dev->tx_queue_len = MVNETA_MAX_TXD; |
3295 | dev->watchdog_timeo = 5 * HZ; | |
3296 | dev->netdev_ops = &mvneta_netdev_ops; | |
3297 | ||
7ad24ea4 | 3298 | dev->ethtool_ops = &mvneta_eth_tool_ops; |
c5aff182 TP |
3299 | |
3300 | pp = netdev_priv(dev); | |
c5aff182 TP |
3301 | pp->phy_node = phy_node; |
3302 | pp->phy_interface = phy_mode; | |
f8af8e6e SS |
3303 | |
3304 | err = of_property_read_string(dn, "managed", &managed); | |
3305 | pp->use_inband_status = (err == 0 && | |
3306 | strcmp(managed, "in-band-status") == 0); | |
f8642885 | 3307 | pp->cpu_notifier.notifier_call = mvneta_percpu_notifier; |
c5aff182 | 3308 | |
189dd626 TP |
3309 | pp->clk = devm_clk_get(&pdev->dev, NULL); |
3310 | if (IS_ERR(pp->clk)) { | |
3311 | err = PTR_ERR(pp->clk); | |
c891c24c | 3312 | goto err_put_phy_node; |
189dd626 TP |
3313 | } |
3314 | ||
3315 | clk_prepare_enable(pp->clk); | |
3316 | ||
c3f0dd38 TP |
3317 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
3318 | pp->base = devm_ioremap_resource(&pdev->dev, res); | |
3319 | if (IS_ERR(pp->base)) { | |
3320 | err = PTR_ERR(pp->base); | |
5445eaf3 APR |
3321 | goto err_clk; |
3322 | } | |
3323 | ||
12bb03b4 MR |
3324 | /* Alloc per-cpu port structure */ |
3325 | pp->ports = alloc_percpu(struct mvneta_pcpu_port); | |
3326 | if (!pp->ports) { | |
3327 | err = -ENOMEM; | |
3328 | goto err_clk; | |
3329 | } | |
3330 | ||
74c41b04 | 3331 | /* Alloc per-cpu stats */ |
1c213bd2 | 3332 | pp->stats = netdev_alloc_pcpu_stats(struct mvneta_pcpu_stats); |
74c41b04 | 3333 | if (!pp->stats) { |
3334 | err = -ENOMEM; | |
12bb03b4 | 3335 | goto err_free_ports; |
74c41b04 | 3336 | } |
3337 | ||
8cc3e439 | 3338 | dt_mac_addr = of_get_mac_address(dn); |
6c7a9a3c | 3339 | if (dt_mac_addr) { |
8cc3e439 TP |
3340 | mac_from = "device tree"; |
3341 | memcpy(dev->dev_addr, dt_mac_addr, ETH_ALEN); | |
3342 | } else { | |
3343 | mvneta_get_mac_addr(pp, hw_mac_addr); | |
3344 | if (is_valid_ether_addr(hw_mac_addr)) { | |
3345 | mac_from = "hardware"; | |
3346 | memcpy(dev->dev_addr, hw_mac_addr, ETH_ALEN); | |
3347 | } else { | |
3348 | mac_from = "random"; | |
3349 | eth_hw_addr_random(dev); | |
3350 | } | |
3351 | } | |
3352 | ||
b65657fc SG |
3353 | if (of_device_is_compatible(dn, "marvell,armada-370-neta")) |
3354 | pp->tx_csum_limit = 1600; | |
3355 | ||
c5aff182 TP |
3356 | pp->tx_ring_size = MVNETA_MAX_TXD; |
3357 | pp->rx_ring_size = MVNETA_MAX_RXD; | |
3358 | ||
3359 | pp->dev = dev; | |
3360 | SET_NETDEV_DEV(dev, &pdev->dev); | |
3361 | ||
9672850b EG |
3362 | err = mvneta_init(&pdev->dev, pp); |
3363 | if (err < 0) | |
74c41b04 | 3364 | goto err_free_stats; |
3f1dd4bc TP |
3365 | |
3366 | err = mvneta_port_power_up(pp, phy_mode); | |
3367 | if (err < 0) { | |
3368 | dev_err(&pdev->dev, "can't power up port\n"); | |
9672850b | 3369 | goto err_free_stats; |
3f1dd4bc | 3370 | } |
c5aff182 TP |
3371 | |
3372 | dram_target_info = mv_mbus_dram_info(); | |
3373 | if (dram_target_info) | |
3374 | mvneta_conf_mbus_windows(pp, dram_target_info); | |
3375 | ||
12bb03b4 MR |
3376 | for_each_present_cpu(cpu) { |
3377 | struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu); | |
3378 | ||
3379 | netif_napi_add(dev, &port->napi, mvneta_poll, NAPI_POLL_WEIGHT); | |
3380 | port->pp = pp; | |
3381 | } | |
c5aff182 | 3382 | |
2adb719d | 3383 | dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; |
01ef26ca EG |
3384 | dev->hw_features |= dev->features; |
3385 | dev->vlan_features |= dev->features; | |
b50b72de | 3386 | dev->priv_flags |= IFF_UNICAST_FLT; |
8eef5f97 | 3387 | dev->gso_max_segs = MVNETA_MAX_TSO_SEGS; |
b50b72de | 3388 | |
c5aff182 TP |
3389 | err = register_netdev(dev); |
3390 | if (err < 0) { | |
3391 | dev_err(&pdev->dev, "failed to register\n"); | |
9672850b | 3392 | goto err_free_stats; |
c5aff182 TP |
3393 | } |
3394 | ||
8cc3e439 TP |
3395 | netdev_info(dev, "Using %s mac address %pM\n", mac_from, |
3396 | dev->dev_addr); | |
c5aff182 TP |
3397 | |
3398 | platform_set_drvdata(pdev, pp->dev); | |
3399 | ||
898b2970 SS |
3400 | if (pp->use_inband_status) { |
3401 | struct phy_device *phy = of_phy_find_device(dn); | |
3402 | ||
3403 | mvneta_fixed_link_update(pp, phy); | |
04d53b20 RK |
3404 | |
3405 | put_device(&phy->dev); | |
898b2970 SS |
3406 | } |
3407 | ||
c5aff182 TP |
3408 | return 0; |
3409 | ||
74c41b04 | 3410 | err_free_stats: |
3411 | free_percpu(pp->stats); | |
12bb03b4 MR |
3412 | err_free_ports: |
3413 | free_percpu(pp->ports); | |
5445eaf3 APR |
3414 | err_clk: |
3415 | clk_disable_unprepare(pp->clk); | |
c891c24c UKK |
3416 | err_put_phy_node: |
3417 | of_node_put(phy_node); | |
c5aff182 TP |
3418 | err_free_irq: |
3419 | irq_dispose_mapping(dev->irq); | |
3420 | err_free_netdev: | |
3421 | free_netdev(dev); | |
3422 | return err; | |
3423 | } | |
3424 | ||
3425 | /* Device removal routine */ | |
03ce758e | 3426 | static int mvneta_remove(struct platform_device *pdev) |
c5aff182 TP |
3427 | { |
3428 | struct net_device *dev = platform_get_drvdata(pdev); | |
3429 | struct mvneta_port *pp = netdev_priv(dev); | |
3430 | ||
3431 | unregister_netdev(dev); | |
189dd626 | 3432 | clk_disable_unprepare(pp->clk); |
12bb03b4 | 3433 | free_percpu(pp->ports); |
74c41b04 | 3434 | free_percpu(pp->stats); |
c5aff182 | 3435 | irq_dispose_mapping(dev->irq); |
c891c24c | 3436 | of_node_put(pp->phy_node); |
c5aff182 TP |
3437 | free_netdev(dev); |
3438 | ||
c5aff182 TP |
3439 | return 0; |
3440 | } | |
3441 | ||
3442 | static const struct of_device_id mvneta_match[] = { | |
3443 | { .compatible = "marvell,armada-370-neta" }, | |
f522a975 | 3444 | { .compatible = "marvell,armada-xp-neta" }, |
c5aff182 TP |
3445 | { } |
3446 | }; | |
3447 | MODULE_DEVICE_TABLE(of, mvneta_match); | |
3448 | ||
3449 | static struct platform_driver mvneta_driver = { | |
3450 | .probe = mvneta_probe, | |
03ce758e | 3451 | .remove = mvneta_remove, |
c5aff182 TP |
3452 | .driver = { |
3453 | .name = MVNETA_DRIVER_NAME, | |
3454 | .of_match_table = mvneta_match, | |
3455 | }, | |
3456 | }; | |
3457 | ||
3458 | module_platform_driver(mvneta_driver); | |
3459 | ||
3460 | MODULE_DESCRIPTION("Marvell NETA Ethernet Driver - www.marvell.com"); | |
3461 | MODULE_AUTHOR("Rami Rosen <rosenr@marvell.com>, Thomas Petazzoni <thomas.petazzoni@free-electrons.com>"); | |
3462 | MODULE_LICENSE("GPL"); | |
3463 | ||
3464 | module_param(rxq_number, int, S_IRUGO); | |
3465 | module_param(txq_number, int, S_IRUGO); | |
3466 | ||
3467 | module_param(rxq_def, int, S_IRUGO); | |
f19fadfc | 3468 | module_param(rx_copybreak, int, S_IRUGO | S_IWUSR); |