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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)) | |
e5bdf689 | 39 | #define MVNETA_RXQ_HW_BUF_ALLOC BIT(0) |
c5aff182 TP |
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 | |
db6ba9a5 | 65 | #define MVNETA_ACCESS_PROTECT_ENABLE 0x2294 |
c5aff182 TP |
66 | #define MVNETA_PORT_CONFIG 0x2400 |
67 | #define MVNETA_UNI_PROMISC_MODE BIT(0) | |
68 | #define MVNETA_DEF_RXQ(q) ((q) << 1) | |
69 | #define MVNETA_DEF_RXQ_ARP(q) ((q) << 4) | |
70 | #define MVNETA_TX_UNSET_ERR_SUM BIT(12) | |
71 | #define MVNETA_DEF_RXQ_TCP(q) ((q) << 16) | |
72 | #define MVNETA_DEF_RXQ_UDP(q) ((q) << 19) | |
73 | #define MVNETA_DEF_RXQ_BPDU(q) ((q) << 22) | |
74 | #define MVNETA_RX_CSUM_WITH_PSEUDO_HDR BIT(25) | |
75 | #define MVNETA_PORT_CONFIG_DEFL_VALUE(q) (MVNETA_DEF_RXQ(q) | \ | |
76 | MVNETA_DEF_RXQ_ARP(q) | \ | |
77 | MVNETA_DEF_RXQ_TCP(q) | \ | |
78 | MVNETA_DEF_RXQ_UDP(q) | \ | |
79 | MVNETA_DEF_RXQ_BPDU(q) | \ | |
80 | MVNETA_TX_UNSET_ERR_SUM | \ | |
81 | MVNETA_RX_CSUM_WITH_PSEUDO_HDR) | |
82 | #define MVNETA_PORT_CONFIG_EXTEND 0x2404 | |
83 | #define MVNETA_MAC_ADDR_LOW 0x2414 | |
84 | #define MVNETA_MAC_ADDR_HIGH 0x2418 | |
85 | #define MVNETA_SDMA_CONFIG 0x241c | |
86 | #define MVNETA_SDMA_BRST_SIZE_16 4 | |
c5aff182 TP |
87 | #define MVNETA_RX_BRST_SZ_MASK(burst) ((burst) << 1) |
88 | #define MVNETA_RX_NO_DATA_SWAP BIT(4) | |
89 | #define MVNETA_TX_NO_DATA_SWAP BIT(5) | |
9ad8fef6 | 90 | #define MVNETA_DESC_SWAP BIT(6) |
c5aff182 TP |
91 | #define MVNETA_TX_BRST_SZ_MASK(burst) ((burst) << 22) |
92 | #define MVNETA_PORT_STATUS 0x2444 | |
93 | #define MVNETA_TX_IN_PRGRS BIT(1) | |
94 | #define MVNETA_TX_FIFO_EMPTY BIT(8) | |
95 | #define MVNETA_RX_MIN_FRAME_SIZE 0x247c | |
3f1dd4bc | 96 | #define MVNETA_SERDES_CFG 0x24A0 |
5445eaf3 | 97 | #define MVNETA_SGMII_SERDES_PROTO 0x0cc7 |
3f1dd4bc | 98 | #define MVNETA_QSGMII_SERDES_PROTO 0x0667 |
c5aff182 TP |
99 | #define MVNETA_TYPE_PRIO 0x24bc |
100 | #define MVNETA_FORCE_UNI BIT(21) | |
101 | #define MVNETA_TXQ_CMD_1 0x24e4 | |
102 | #define MVNETA_TXQ_CMD 0x2448 | |
103 | #define MVNETA_TXQ_DISABLE_SHIFT 8 | |
104 | #define MVNETA_TXQ_ENABLE_MASK 0x000000ff | |
e483911f AL |
105 | #define MVNETA_RX_DISCARD_FRAME_COUNT 0x2484 |
106 | #define MVNETA_OVERRUN_FRAME_COUNT 0x2488 | |
898b2970 SS |
107 | #define MVNETA_GMAC_CLOCK_DIVIDER 0x24f4 |
108 | #define MVNETA_GMAC_1MS_CLOCK_ENABLE BIT(31) | |
c5aff182 TP |
109 | #define MVNETA_ACC_MODE 0x2500 |
110 | #define MVNETA_CPU_MAP(cpu) (0x2540 + ((cpu) << 2)) | |
111 | #define MVNETA_CPU_RXQ_ACCESS_ALL_MASK 0x000000ff | |
112 | #define MVNETA_CPU_TXQ_ACCESS_ALL_MASK 0x0000ff00 | |
113 | #define MVNETA_RXQ_TIME_COAL_REG(q) (0x2580 + ((q) << 2)) | |
40ba35e7 | 114 | |
115 | /* Exception Interrupt Port/Queue Cause register */ | |
116 | ||
c5aff182 | 117 | #define MVNETA_INTR_NEW_CAUSE 0x25a0 |
c5aff182 | 118 | #define MVNETA_INTR_NEW_MASK 0x25a4 |
40ba35e7 | 119 | |
120 | /* bits 0..7 = TXQ SENT, one bit per queue. | |
121 | * bits 8..15 = RXQ OCCUP, one bit per queue. | |
122 | * bits 16..23 = RXQ FREE, one bit per queue. | |
123 | * bit 29 = OLD_REG_SUM, see old reg ? | |
124 | * bit 30 = TX_ERR_SUM, one bit for 4 ports | |
125 | * bit 31 = MISC_SUM, one bit for 4 ports | |
126 | */ | |
127 | #define MVNETA_TX_INTR_MASK(nr_txqs) (((1 << nr_txqs) - 1) << 0) | |
128 | #define MVNETA_TX_INTR_MASK_ALL (0xff << 0) | |
129 | #define MVNETA_RX_INTR_MASK(nr_rxqs) (((1 << nr_rxqs) - 1) << 8) | |
130 | #define MVNETA_RX_INTR_MASK_ALL (0xff << 8) | |
898b2970 | 131 | #define MVNETA_MISCINTR_INTR_MASK BIT(31) |
40ba35e7 | 132 | |
c5aff182 TP |
133 | #define MVNETA_INTR_OLD_CAUSE 0x25a8 |
134 | #define MVNETA_INTR_OLD_MASK 0x25ac | |
40ba35e7 | 135 | |
136 | /* Data Path Port/Queue Cause Register */ | |
c5aff182 TP |
137 | #define MVNETA_INTR_MISC_CAUSE 0x25b0 |
138 | #define MVNETA_INTR_MISC_MASK 0x25b4 | |
40ba35e7 | 139 | |
140 | #define MVNETA_CAUSE_PHY_STATUS_CHANGE BIT(0) | |
141 | #define MVNETA_CAUSE_LINK_CHANGE BIT(1) | |
142 | #define MVNETA_CAUSE_PTP BIT(4) | |
143 | ||
144 | #define MVNETA_CAUSE_INTERNAL_ADDR_ERR BIT(7) | |
145 | #define MVNETA_CAUSE_RX_OVERRUN BIT(8) | |
146 | #define MVNETA_CAUSE_RX_CRC_ERROR BIT(9) | |
147 | #define MVNETA_CAUSE_RX_LARGE_PKT BIT(10) | |
148 | #define MVNETA_CAUSE_TX_UNDERUN BIT(11) | |
149 | #define MVNETA_CAUSE_PRBS_ERR BIT(12) | |
150 | #define MVNETA_CAUSE_PSC_SYNC_CHANGE BIT(13) | |
151 | #define MVNETA_CAUSE_SERDES_SYNC_ERR BIT(14) | |
152 | ||
153 | #define MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT 16 | |
154 | #define MVNETA_CAUSE_BMU_ALLOC_ERR_ALL_MASK (0xF << MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT) | |
155 | #define MVNETA_CAUSE_BMU_ALLOC_ERR_MASK(pool) (1 << (MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT + (pool))) | |
156 | ||
157 | #define MVNETA_CAUSE_TXQ_ERROR_SHIFT 24 | |
158 | #define MVNETA_CAUSE_TXQ_ERROR_ALL_MASK (0xFF << MVNETA_CAUSE_TXQ_ERROR_SHIFT) | |
159 | #define MVNETA_CAUSE_TXQ_ERROR_MASK(q) (1 << (MVNETA_CAUSE_TXQ_ERROR_SHIFT + (q))) | |
160 | ||
c5aff182 TP |
161 | #define MVNETA_INTR_ENABLE 0x25b8 |
162 | #define MVNETA_TXQ_INTR_ENABLE_ALL_MASK 0x0000ff00 | |
dc1aadf6 | 163 | #define MVNETA_RXQ_INTR_ENABLE_ALL_MASK 0x000000ff |
40ba35e7 | 164 | |
c5aff182 TP |
165 | #define MVNETA_RXQ_CMD 0x2680 |
166 | #define MVNETA_RXQ_DISABLE_SHIFT 8 | |
167 | #define MVNETA_RXQ_ENABLE_MASK 0x000000ff | |
168 | #define MVETH_TXQ_TOKEN_COUNT_REG(q) (0x2700 + ((q) << 4)) | |
169 | #define MVETH_TXQ_TOKEN_CFG_REG(q) (0x2704 + ((q) << 4)) | |
170 | #define MVNETA_GMAC_CTRL_0 0x2c00 | |
171 | #define MVNETA_GMAC_MAX_RX_SIZE_SHIFT 2 | |
172 | #define MVNETA_GMAC_MAX_RX_SIZE_MASK 0x7ffc | |
173 | #define MVNETA_GMAC0_PORT_ENABLE BIT(0) | |
174 | #define MVNETA_GMAC_CTRL_2 0x2c08 | |
898b2970 | 175 | #define MVNETA_GMAC2_INBAND_AN_ENABLE BIT(0) |
a79121d3 | 176 | #define MVNETA_GMAC2_PCS_ENABLE BIT(3) |
c5aff182 TP |
177 | #define MVNETA_GMAC2_PORT_RGMII BIT(4) |
178 | #define MVNETA_GMAC2_PORT_RESET BIT(6) | |
179 | #define MVNETA_GMAC_STATUS 0x2c10 | |
180 | #define MVNETA_GMAC_LINK_UP BIT(0) | |
181 | #define MVNETA_GMAC_SPEED_1000 BIT(1) | |
182 | #define MVNETA_GMAC_SPEED_100 BIT(2) | |
183 | #define MVNETA_GMAC_FULL_DUPLEX BIT(3) | |
184 | #define MVNETA_GMAC_RX_FLOW_CTRL_ENABLE BIT(4) | |
185 | #define MVNETA_GMAC_TX_FLOW_CTRL_ENABLE BIT(5) | |
186 | #define MVNETA_GMAC_RX_FLOW_CTRL_ACTIVE BIT(6) | |
187 | #define MVNETA_GMAC_TX_FLOW_CTRL_ACTIVE BIT(7) | |
188 | #define MVNETA_GMAC_AUTONEG_CONFIG 0x2c0c | |
189 | #define MVNETA_GMAC_FORCE_LINK_DOWN BIT(0) | |
190 | #define MVNETA_GMAC_FORCE_LINK_PASS BIT(1) | |
898b2970 | 191 | #define MVNETA_GMAC_INBAND_AN_ENABLE BIT(2) |
c5aff182 TP |
192 | #define MVNETA_GMAC_CONFIG_MII_SPEED BIT(5) |
193 | #define MVNETA_GMAC_CONFIG_GMII_SPEED BIT(6) | |
71408602 | 194 | #define MVNETA_GMAC_AN_SPEED_EN BIT(7) |
898b2970 | 195 | #define MVNETA_GMAC_AN_FLOW_CTRL_EN BIT(11) |
c5aff182 | 196 | #define MVNETA_GMAC_CONFIG_FULL_DUPLEX BIT(12) |
71408602 | 197 | #define MVNETA_GMAC_AN_DUPLEX_EN BIT(13) |
e483911f | 198 | #define MVNETA_MIB_COUNTERS_BASE 0x3000 |
c5aff182 TP |
199 | #define MVNETA_MIB_LATE_COLLISION 0x7c |
200 | #define MVNETA_DA_FILT_SPEC_MCAST 0x3400 | |
201 | #define MVNETA_DA_FILT_OTH_MCAST 0x3500 | |
202 | #define MVNETA_DA_FILT_UCAST_BASE 0x3600 | |
203 | #define MVNETA_TXQ_BASE_ADDR_REG(q) (0x3c00 + ((q) << 2)) | |
204 | #define MVNETA_TXQ_SIZE_REG(q) (0x3c20 + ((q) << 2)) | |
205 | #define MVNETA_TXQ_SENT_THRESH_ALL_MASK 0x3fff0000 | |
206 | #define MVNETA_TXQ_SENT_THRESH_MASK(coal) ((coal) << 16) | |
207 | #define MVNETA_TXQ_UPDATE_REG(q) (0x3c60 + ((q) << 2)) | |
208 | #define MVNETA_TXQ_DEC_SENT_SHIFT 16 | |
209 | #define MVNETA_TXQ_STATUS_REG(q) (0x3c40 + ((q) << 2)) | |
210 | #define MVNETA_TXQ_SENT_DESC_SHIFT 16 | |
211 | #define MVNETA_TXQ_SENT_DESC_MASK 0x3fff0000 | |
212 | #define MVNETA_PORT_TX_RESET 0x3cf0 | |
213 | #define MVNETA_PORT_TX_DMA_RESET BIT(0) | |
214 | #define MVNETA_TX_MTU 0x3e0c | |
215 | #define MVNETA_TX_TOKEN_SIZE 0x3e14 | |
216 | #define MVNETA_TX_TOKEN_SIZE_MAX 0xffffffff | |
217 | #define MVNETA_TXQ_TOKEN_SIZE_REG(q) (0x3e40 + ((q) << 2)) | |
218 | #define MVNETA_TXQ_TOKEN_SIZE_MAX 0x7fffffff | |
219 | ||
220 | #define MVNETA_CAUSE_TXQ_SENT_DESC_ALL_MASK 0xff | |
221 | ||
222 | /* Descriptor ring Macros */ | |
223 | #define MVNETA_QUEUE_NEXT_DESC(q, index) \ | |
224 | (((index) < (q)->last_desc) ? ((index) + 1) : 0) | |
225 | ||
226 | /* Various constants */ | |
227 | ||
228 | /* Coalescing */ | |
aebea2ba | 229 | #define MVNETA_TXDONE_COAL_PKTS 1 |
c5aff182 TP |
230 | #define MVNETA_RX_COAL_PKTS 32 |
231 | #define MVNETA_RX_COAL_USEC 100 | |
232 | ||
6a20c175 | 233 | /* The two bytes Marvell header. Either contains a special value used |
c5aff182 TP |
234 | * by Marvell switches when a specific hardware mode is enabled (not |
235 | * supported by this driver) or is filled automatically by zeroes on | |
236 | * the RX side. Those two bytes being at the front of the Ethernet | |
237 | * header, they allow to have the IP header aligned on a 4 bytes | |
238 | * boundary automatically: the hardware skips those two bytes on its | |
239 | * own. | |
240 | */ | |
241 | #define MVNETA_MH_SIZE 2 | |
242 | ||
243 | #define MVNETA_VLAN_TAG_LEN 4 | |
244 | ||
245 | #define MVNETA_CPU_D_CACHE_LINE_SIZE 32 | |
9110ee07 | 246 | #define MVNETA_TX_CSUM_DEF_SIZE 1600 |
c5aff182 TP |
247 | #define MVNETA_TX_CSUM_MAX_SIZE 9800 |
248 | #define MVNETA_ACC_MODE_EXT 1 | |
249 | ||
250 | /* Timeout constants */ | |
251 | #define MVNETA_TX_DISABLE_TIMEOUT_MSEC 1000 | |
252 | #define MVNETA_RX_DISABLE_TIMEOUT_MSEC 1000 | |
253 | #define MVNETA_TX_FIFO_EMPTY_TIMEOUT 10000 | |
254 | ||
255 | #define MVNETA_TX_MTU_MAX 0x3ffff | |
256 | ||
2adb719d EG |
257 | /* TSO header size */ |
258 | #define TSO_HEADER_SIZE 128 | |
259 | ||
c5aff182 TP |
260 | /* Max number of Rx descriptors */ |
261 | #define MVNETA_MAX_RXD 128 | |
262 | ||
263 | /* Max number of Tx descriptors */ | |
264 | #define MVNETA_MAX_TXD 532 | |
265 | ||
8eef5f97 EG |
266 | /* Max number of allowed TCP segments for software TSO */ |
267 | #define MVNETA_MAX_TSO_SEGS 100 | |
268 | ||
269 | #define MVNETA_MAX_SKB_DESCS (MVNETA_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS) | |
270 | ||
c5aff182 TP |
271 | /* descriptor aligned size */ |
272 | #define MVNETA_DESC_ALIGNED_SIZE 32 | |
273 | ||
274 | #define MVNETA_RX_PKT_SIZE(mtu) \ | |
275 | ALIGN((mtu) + MVNETA_MH_SIZE + MVNETA_VLAN_TAG_LEN + \ | |
276 | ETH_HLEN + ETH_FCS_LEN, \ | |
277 | MVNETA_CPU_D_CACHE_LINE_SIZE) | |
278 | ||
2e3173a3 EG |
279 | #define IS_TSO_HEADER(txq, addr) \ |
280 | ((addr >= txq->tso_hdrs_phys) && \ | |
281 | (addr < txq->tso_hdrs_phys + txq->size * TSO_HEADER_SIZE)) | |
282 | ||
c5aff182 TP |
283 | #define MVNETA_RX_BUF_SIZE(pkt_size) ((pkt_size) + NET_SKB_PAD) |
284 | ||
9b0cdefa RK |
285 | struct mvneta_statistic { |
286 | unsigned short offset; | |
287 | unsigned short type; | |
288 | const char name[ETH_GSTRING_LEN]; | |
289 | }; | |
290 | ||
291 | #define T_REG_32 32 | |
292 | #define T_REG_64 64 | |
293 | ||
294 | static const struct mvneta_statistic mvneta_statistics[] = { | |
295 | { 0x3000, T_REG_64, "good_octets_received", }, | |
296 | { 0x3010, T_REG_32, "good_frames_received", }, | |
297 | { 0x3008, T_REG_32, "bad_octets_received", }, | |
298 | { 0x3014, T_REG_32, "bad_frames_received", }, | |
299 | { 0x3018, T_REG_32, "broadcast_frames_received", }, | |
300 | { 0x301c, T_REG_32, "multicast_frames_received", }, | |
301 | { 0x3050, T_REG_32, "unrec_mac_control_received", }, | |
302 | { 0x3058, T_REG_32, "good_fc_received", }, | |
303 | { 0x305c, T_REG_32, "bad_fc_received", }, | |
304 | { 0x3060, T_REG_32, "undersize_received", }, | |
305 | { 0x3064, T_REG_32, "fragments_received", }, | |
306 | { 0x3068, T_REG_32, "oversize_received", }, | |
307 | { 0x306c, T_REG_32, "jabber_received", }, | |
308 | { 0x3070, T_REG_32, "mac_receive_error", }, | |
309 | { 0x3074, T_REG_32, "bad_crc_event", }, | |
310 | { 0x3078, T_REG_32, "collision", }, | |
311 | { 0x307c, T_REG_32, "late_collision", }, | |
312 | { 0x2484, T_REG_32, "rx_discard", }, | |
313 | { 0x2488, T_REG_32, "rx_overrun", }, | |
314 | { 0x3020, T_REG_32, "frames_64_octets", }, | |
315 | { 0x3024, T_REG_32, "frames_65_to_127_octets", }, | |
316 | { 0x3028, T_REG_32, "frames_128_to_255_octets", }, | |
317 | { 0x302c, T_REG_32, "frames_256_to_511_octets", }, | |
318 | { 0x3030, T_REG_32, "frames_512_to_1023_octets", }, | |
319 | { 0x3034, T_REG_32, "frames_1024_to_max_octets", }, | |
320 | { 0x3038, T_REG_64, "good_octets_sent", }, | |
321 | { 0x3040, T_REG_32, "good_frames_sent", }, | |
322 | { 0x3044, T_REG_32, "excessive_collision", }, | |
323 | { 0x3048, T_REG_32, "multicast_frames_sent", }, | |
324 | { 0x304c, T_REG_32, "broadcast_frames_sent", }, | |
325 | { 0x3054, T_REG_32, "fc_sent", }, | |
326 | { 0x300c, T_REG_32, "internal_mac_transmit_err", }, | |
327 | }; | |
328 | ||
74c41b04 | 329 | struct mvneta_pcpu_stats { |
c5aff182 | 330 | struct u64_stats_sync syncp; |
74c41b04 | 331 | u64 rx_packets; |
332 | u64 rx_bytes; | |
333 | u64 tx_packets; | |
334 | u64 tx_bytes; | |
c5aff182 TP |
335 | }; |
336 | ||
12bb03b4 MR |
337 | struct mvneta_pcpu_port { |
338 | /* Pointer to the shared port */ | |
339 | struct mvneta_port *pp; | |
340 | ||
341 | /* Pointer to the CPU-local NAPI struct */ | |
342 | struct napi_struct napi; | |
343 | ||
344 | /* Cause of the previous interrupt */ | |
345 | u32 cause_rx_tx; | |
346 | }; | |
347 | ||
c5aff182 | 348 | struct mvneta_port { |
12bb03b4 MR |
349 | struct mvneta_pcpu_port __percpu *ports; |
350 | struct mvneta_pcpu_stats __percpu *stats; | |
351 | ||
c5aff182 | 352 | int pkt_size; |
8ec2cd48 | 353 | unsigned int frag_size; |
c5aff182 TP |
354 | void __iomem *base; |
355 | struct mvneta_rx_queue *rxqs; | |
356 | struct mvneta_tx_queue *txqs; | |
c5aff182 | 357 | struct net_device *dev; |
f8642885 | 358 | struct notifier_block cpu_notifier; |
c5aff182 | 359 | |
c5aff182 | 360 | /* Core clock */ |
189dd626 | 361 | struct clk *clk; |
c5aff182 TP |
362 | u8 mcast_count[256]; |
363 | u16 tx_ring_size; | |
364 | u16 rx_ring_size; | |
c5aff182 TP |
365 | |
366 | struct mii_bus *mii_bus; | |
367 | struct phy_device *phy_dev; | |
368 | phy_interface_t phy_interface; | |
369 | struct device_node *phy_node; | |
370 | unsigned int link; | |
371 | unsigned int duplex; | |
372 | unsigned int speed; | |
b65657fc | 373 | unsigned int tx_csum_limit; |
0c0744fc | 374 | unsigned int use_inband_status:1; |
9b0cdefa RK |
375 | |
376 | u64 ethtool_stats[ARRAY_SIZE(mvneta_statistics)]; | |
c5aff182 TP |
377 | }; |
378 | ||
6a20c175 | 379 | /* The mvneta_tx_desc and mvneta_rx_desc structures describe the |
c5aff182 TP |
380 | * layout of the transmit and reception DMA descriptors, and their |
381 | * layout is therefore defined by the hardware design | |
382 | */ | |
6083ed44 | 383 | |
c5aff182 TP |
384 | #define MVNETA_TX_L3_OFF_SHIFT 0 |
385 | #define MVNETA_TX_IP_HLEN_SHIFT 8 | |
386 | #define MVNETA_TX_L4_UDP BIT(16) | |
387 | #define MVNETA_TX_L3_IP6 BIT(17) | |
388 | #define MVNETA_TXD_IP_CSUM BIT(18) | |
389 | #define MVNETA_TXD_Z_PAD BIT(19) | |
390 | #define MVNETA_TXD_L_DESC BIT(20) | |
391 | #define MVNETA_TXD_F_DESC BIT(21) | |
392 | #define MVNETA_TXD_FLZ_DESC (MVNETA_TXD_Z_PAD | \ | |
393 | MVNETA_TXD_L_DESC | \ | |
394 | MVNETA_TXD_F_DESC) | |
395 | #define MVNETA_TX_L4_CSUM_FULL BIT(30) | |
396 | #define MVNETA_TX_L4_CSUM_NOT BIT(31) | |
397 | ||
c5aff182 TP |
398 | #define MVNETA_RXD_ERR_CRC 0x0 |
399 | #define MVNETA_RXD_ERR_SUMMARY BIT(16) | |
400 | #define MVNETA_RXD_ERR_OVERRUN BIT(17) | |
401 | #define MVNETA_RXD_ERR_LEN BIT(18) | |
402 | #define MVNETA_RXD_ERR_RESOURCE (BIT(17) | BIT(18)) | |
403 | #define MVNETA_RXD_ERR_CODE_MASK (BIT(17) | BIT(18)) | |
404 | #define MVNETA_RXD_L3_IP4 BIT(25) | |
405 | #define MVNETA_RXD_FIRST_LAST_DESC (BIT(26) | BIT(27)) | |
406 | #define MVNETA_RXD_L4_CSUM_OK BIT(30) | |
407 | ||
9ad8fef6 | 408 | #if defined(__LITTLE_ENDIAN) |
6083ed44 TP |
409 | struct mvneta_tx_desc { |
410 | u32 command; /* Options used by HW for packet transmitting.*/ | |
411 | u16 reserverd1; /* csum_l4 (for future use) */ | |
412 | u16 data_size; /* Data size of transmitted packet in bytes */ | |
413 | u32 buf_phys_addr; /* Physical addr of transmitted buffer */ | |
414 | u32 reserved2; /* hw_cmd - (for future use, PMT) */ | |
415 | u32 reserved3[4]; /* Reserved - (for future use) */ | |
416 | }; | |
417 | ||
418 | struct mvneta_rx_desc { | |
419 | u32 status; /* Info about received packet */ | |
c5aff182 TP |
420 | u16 reserved1; /* pnc_info - (for future use, PnC) */ |
421 | u16 data_size; /* Size of received packet in bytes */ | |
6083ed44 | 422 | |
c5aff182 TP |
423 | u32 buf_phys_addr; /* Physical address of the buffer */ |
424 | u32 reserved2; /* pnc_flow_id (for future use, PnC) */ | |
6083ed44 | 425 | |
c5aff182 TP |
426 | u32 buf_cookie; /* cookie for access to RX buffer in rx path */ |
427 | u16 reserved3; /* prefetch_cmd, for future use */ | |
428 | u16 reserved4; /* csum_l4 - (for future use, PnC) */ | |
6083ed44 | 429 | |
c5aff182 TP |
430 | u32 reserved5; /* pnc_extra PnC (for future use, PnC) */ |
431 | u32 reserved6; /* hw_cmd (for future use, PnC and HWF) */ | |
432 | }; | |
9ad8fef6 TP |
433 | #else |
434 | struct mvneta_tx_desc { | |
435 | u16 data_size; /* Data size of transmitted packet in bytes */ | |
436 | u16 reserverd1; /* csum_l4 (for future use) */ | |
437 | u32 command; /* Options used by HW for packet transmitting.*/ | |
438 | u32 reserved2; /* hw_cmd - (for future use, PMT) */ | |
439 | u32 buf_phys_addr; /* Physical addr of transmitted buffer */ | |
440 | u32 reserved3[4]; /* Reserved - (for future use) */ | |
441 | }; | |
442 | ||
443 | struct mvneta_rx_desc { | |
444 | u16 data_size; /* Size of received packet in bytes */ | |
445 | u16 reserved1; /* pnc_info - (for future use, PnC) */ | |
446 | u32 status; /* Info about received packet */ | |
447 | ||
448 | u32 reserved2; /* pnc_flow_id (for future use, PnC) */ | |
449 | u32 buf_phys_addr; /* Physical address of the buffer */ | |
450 | ||
451 | u16 reserved4; /* csum_l4 - (for future use, PnC) */ | |
452 | u16 reserved3; /* prefetch_cmd, for future use */ | |
453 | u32 buf_cookie; /* cookie for access to RX buffer in rx path */ | |
454 | ||
455 | u32 reserved5; /* pnc_extra PnC (for future use, PnC) */ | |
456 | u32 reserved6; /* hw_cmd (for future use, PnC and HWF) */ | |
457 | }; | |
458 | #endif | |
c5aff182 TP |
459 | |
460 | struct mvneta_tx_queue { | |
461 | /* Number of this TX queue, in the range 0-7 */ | |
462 | u8 id; | |
463 | ||
464 | /* Number of TX DMA descriptors in the descriptor ring */ | |
465 | int size; | |
466 | ||
467 | /* Number of currently used TX DMA descriptor in the | |
6a20c175 TP |
468 | * descriptor ring |
469 | */ | |
c5aff182 | 470 | int count; |
8eef5f97 EG |
471 | int tx_stop_threshold; |
472 | int tx_wake_threshold; | |
c5aff182 TP |
473 | |
474 | /* Array of transmitted skb */ | |
475 | struct sk_buff **tx_skb; | |
476 | ||
477 | /* Index of last TX DMA descriptor that was inserted */ | |
478 | int txq_put_index; | |
479 | ||
480 | /* Index of the TX DMA descriptor to be cleaned up */ | |
481 | int txq_get_index; | |
482 | ||
483 | u32 done_pkts_coal; | |
484 | ||
485 | /* Virtual address of the TX DMA descriptors array */ | |
486 | struct mvneta_tx_desc *descs; | |
487 | ||
488 | /* DMA address of the TX DMA descriptors array */ | |
489 | dma_addr_t descs_phys; | |
490 | ||
491 | /* Index of the last TX DMA descriptor */ | |
492 | int last_desc; | |
493 | ||
494 | /* Index of the next TX DMA descriptor to process */ | |
495 | int next_desc_to_proc; | |
2adb719d EG |
496 | |
497 | /* DMA buffers for TSO headers */ | |
498 | char *tso_hdrs; | |
499 | ||
500 | /* DMA address of TSO headers */ | |
501 | dma_addr_t tso_hdrs_phys; | |
c5aff182 TP |
502 | }; |
503 | ||
504 | struct mvneta_rx_queue { | |
505 | /* rx queue number, in the range 0-7 */ | |
506 | u8 id; | |
507 | ||
508 | /* num of rx descriptors in the rx descriptor ring */ | |
509 | int size; | |
510 | ||
511 | /* counter of times when mvneta_refill() failed */ | |
512 | int missed; | |
513 | ||
514 | u32 pkts_coal; | |
515 | u32 time_coal; | |
516 | ||
517 | /* Virtual address of the RX DMA descriptors array */ | |
518 | struct mvneta_rx_desc *descs; | |
519 | ||
520 | /* DMA address of the RX DMA descriptors array */ | |
521 | dma_addr_t descs_phys; | |
522 | ||
523 | /* Index of the last RX DMA descriptor */ | |
524 | int last_desc; | |
525 | ||
526 | /* Index of the next RX DMA descriptor to process */ | |
527 | int next_desc_to_proc; | |
528 | }; | |
529 | ||
edadb7fa EG |
530 | /* The hardware supports eight (8) rx queues, but we are only allowing |
531 | * the first one to be used. Therefore, let's just allocate one queue. | |
532 | */ | |
d8936657 | 533 | static int rxq_number = 8; |
c5aff182 TP |
534 | static int txq_number = 8; |
535 | ||
536 | static int rxq_def; | |
c5aff182 | 537 | |
f19fadfc | 538 | static int rx_copybreak __read_mostly = 256; |
539 | ||
c5aff182 TP |
540 | #define MVNETA_DRIVER_NAME "mvneta" |
541 | #define MVNETA_DRIVER_VERSION "1.0" | |
542 | ||
543 | /* Utility/helper methods */ | |
544 | ||
545 | /* Write helper method */ | |
546 | static void mvreg_write(struct mvneta_port *pp, u32 offset, u32 data) | |
547 | { | |
548 | writel(data, pp->base + offset); | |
549 | } | |
550 | ||
551 | /* Read helper method */ | |
552 | static u32 mvreg_read(struct mvneta_port *pp, u32 offset) | |
553 | { | |
554 | return readl(pp->base + offset); | |
555 | } | |
556 | ||
557 | /* Increment txq get counter */ | |
558 | static void mvneta_txq_inc_get(struct mvneta_tx_queue *txq) | |
559 | { | |
560 | txq->txq_get_index++; | |
561 | if (txq->txq_get_index == txq->size) | |
562 | txq->txq_get_index = 0; | |
563 | } | |
564 | ||
565 | /* Increment txq put counter */ | |
566 | static void mvneta_txq_inc_put(struct mvneta_tx_queue *txq) | |
567 | { | |
568 | txq->txq_put_index++; | |
569 | if (txq->txq_put_index == txq->size) | |
570 | txq->txq_put_index = 0; | |
571 | } | |
572 | ||
573 | ||
574 | /* Clear all MIB counters */ | |
575 | static void mvneta_mib_counters_clear(struct mvneta_port *pp) | |
576 | { | |
577 | int i; | |
578 | u32 dummy; | |
579 | ||
580 | /* Perform dummy reads from MIB counters */ | |
581 | for (i = 0; i < MVNETA_MIB_LATE_COLLISION; i += 4) | |
582 | dummy = mvreg_read(pp, (MVNETA_MIB_COUNTERS_BASE + i)); | |
e483911f AL |
583 | dummy = mvreg_read(pp, MVNETA_RX_DISCARD_FRAME_COUNT); |
584 | dummy = mvreg_read(pp, MVNETA_OVERRUN_FRAME_COUNT); | |
c5aff182 TP |
585 | } |
586 | ||
587 | /* Get System Network Statistics */ | |
588 | struct rtnl_link_stats64 *mvneta_get_stats64(struct net_device *dev, | |
589 | struct rtnl_link_stats64 *stats) | |
590 | { | |
591 | struct mvneta_port *pp = netdev_priv(dev); | |
592 | unsigned int start; | |
74c41b04 | 593 | int cpu; |
c5aff182 | 594 | |
74c41b04 | 595 | for_each_possible_cpu(cpu) { |
596 | struct mvneta_pcpu_stats *cpu_stats; | |
597 | u64 rx_packets; | |
598 | u64 rx_bytes; | |
599 | u64 tx_packets; | |
600 | u64 tx_bytes; | |
c5aff182 | 601 | |
74c41b04 | 602 | cpu_stats = per_cpu_ptr(pp->stats, cpu); |
603 | do { | |
57a7744e | 604 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); |
74c41b04 | 605 | rx_packets = cpu_stats->rx_packets; |
606 | rx_bytes = cpu_stats->rx_bytes; | |
607 | tx_packets = cpu_stats->tx_packets; | |
608 | tx_bytes = cpu_stats->tx_bytes; | |
57a7744e | 609 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); |
c5aff182 | 610 | |
74c41b04 | 611 | stats->rx_packets += rx_packets; |
612 | stats->rx_bytes += rx_bytes; | |
613 | stats->tx_packets += tx_packets; | |
614 | stats->tx_bytes += tx_bytes; | |
615 | } | |
c5aff182 TP |
616 | |
617 | stats->rx_errors = dev->stats.rx_errors; | |
618 | stats->rx_dropped = dev->stats.rx_dropped; | |
619 | ||
620 | stats->tx_dropped = dev->stats.tx_dropped; | |
621 | ||
622 | return stats; | |
623 | } | |
624 | ||
625 | /* Rx descriptors helper methods */ | |
626 | ||
5428213c | 627 | /* Checks whether the RX descriptor having this status is both the first |
628 | * and the last descriptor for the RX packet. Each RX packet is currently | |
c5aff182 TP |
629 | * received through a single RX descriptor, so not having each RX |
630 | * descriptor with its first and last bits set is an error | |
631 | */ | |
5428213c | 632 | static int mvneta_rxq_desc_is_first_last(u32 status) |
c5aff182 | 633 | { |
5428213c | 634 | return (status & MVNETA_RXD_FIRST_LAST_DESC) == |
c5aff182 TP |
635 | MVNETA_RXD_FIRST_LAST_DESC; |
636 | } | |
637 | ||
638 | /* Add number of descriptors ready to receive new packets */ | |
639 | static void mvneta_rxq_non_occup_desc_add(struct mvneta_port *pp, | |
640 | struct mvneta_rx_queue *rxq, | |
641 | int ndescs) | |
642 | { | |
643 | /* Only MVNETA_RXQ_ADD_NON_OCCUPIED_MAX (255) descriptors can | |
6a20c175 TP |
644 | * be added at once |
645 | */ | |
c5aff182 TP |
646 | while (ndescs > MVNETA_RXQ_ADD_NON_OCCUPIED_MAX) { |
647 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), | |
648 | (MVNETA_RXQ_ADD_NON_OCCUPIED_MAX << | |
649 | MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT)); | |
650 | ndescs -= MVNETA_RXQ_ADD_NON_OCCUPIED_MAX; | |
651 | } | |
652 | ||
653 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), | |
654 | (ndescs << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT)); | |
655 | } | |
656 | ||
657 | /* Get number of RX descriptors occupied by received packets */ | |
658 | static int mvneta_rxq_busy_desc_num_get(struct mvneta_port *pp, | |
659 | struct mvneta_rx_queue *rxq) | |
660 | { | |
661 | u32 val; | |
662 | ||
663 | val = mvreg_read(pp, MVNETA_RXQ_STATUS_REG(rxq->id)); | |
664 | return val & MVNETA_RXQ_OCCUPIED_ALL_MASK; | |
665 | } | |
666 | ||
6a20c175 | 667 | /* Update num of rx desc called upon return from rx path or |
c5aff182 TP |
668 | * from mvneta_rxq_drop_pkts(). |
669 | */ | |
670 | static void mvneta_rxq_desc_num_update(struct mvneta_port *pp, | |
671 | struct mvneta_rx_queue *rxq, | |
672 | int rx_done, int rx_filled) | |
673 | { | |
674 | u32 val; | |
675 | ||
676 | if ((rx_done <= 0xff) && (rx_filled <= 0xff)) { | |
677 | val = rx_done | | |
678 | (rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT); | |
679 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val); | |
680 | return; | |
681 | } | |
682 | ||
683 | /* Only 255 descriptors can be added at once */ | |
684 | while ((rx_done > 0) || (rx_filled > 0)) { | |
685 | if (rx_done <= 0xff) { | |
686 | val = rx_done; | |
687 | rx_done = 0; | |
688 | } else { | |
689 | val = 0xff; | |
690 | rx_done -= 0xff; | |
691 | } | |
692 | if (rx_filled <= 0xff) { | |
693 | val |= rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT; | |
694 | rx_filled = 0; | |
695 | } else { | |
696 | val |= 0xff << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT; | |
697 | rx_filled -= 0xff; | |
698 | } | |
699 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val); | |
700 | } | |
701 | } | |
702 | ||
703 | /* Get pointer to next RX descriptor to be processed by SW */ | |
704 | static struct mvneta_rx_desc * | |
705 | mvneta_rxq_next_desc_get(struct mvneta_rx_queue *rxq) | |
706 | { | |
707 | int rx_desc = rxq->next_desc_to_proc; | |
708 | ||
709 | rxq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(rxq, rx_desc); | |
34e4179d | 710 | prefetch(rxq->descs + rxq->next_desc_to_proc); |
c5aff182 TP |
711 | return rxq->descs + rx_desc; |
712 | } | |
713 | ||
714 | /* Change maximum receive size of the port. */ | |
715 | static void mvneta_max_rx_size_set(struct mvneta_port *pp, int max_rx_size) | |
716 | { | |
717 | u32 val; | |
718 | ||
719 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
720 | val &= ~MVNETA_GMAC_MAX_RX_SIZE_MASK; | |
721 | val |= ((max_rx_size - MVNETA_MH_SIZE) / 2) << | |
722 | MVNETA_GMAC_MAX_RX_SIZE_SHIFT; | |
723 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
724 | } | |
725 | ||
726 | ||
727 | /* Set rx queue offset */ | |
728 | static void mvneta_rxq_offset_set(struct mvneta_port *pp, | |
729 | struct mvneta_rx_queue *rxq, | |
730 | int offset) | |
731 | { | |
732 | u32 val; | |
733 | ||
734 | val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id)); | |
735 | val &= ~MVNETA_RXQ_PKT_OFFSET_ALL_MASK; | |
736 | ||
737 | /* Offset is in */ | |
738 | val |= MVNETA_RXQ_PKT_OFFSET_MASK(offset >> 3); | |
739 | mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val); | |
740 | } | |
741 | ||
742 | ||
743 | /* Tx descriptors helper methods */ | |
744 | ||
745 | /* Update HW with number of TX descriptors to be sent */ | |
746 | static void mvneta_txq_pend_desc_add(struct mvneta_port *pp, | |
747 | struct mvneta_tx_queue *txq, | |
748 | int pend_desc) | |
749 | { | |
750 | u32 val; | |
751 | ||
752 | /* Only 255 descriptors can be added at once ; Assume caller | |
6a20c175 TP |
753 | * process TX desriptors in quanta less than 256 |
754 | */ | |
c5aff182 TP |
755 | val = pend_desc; |
756 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
757 | } | |
758 | ||
759 | /* Get pointer to next TX descriptor to be processed (send) by HW */ | |
760 | static struct mvneta_tx_desc * | |
761 | mvneta_txq_next_desc_get(struct mvneta_tx_queue *txq) | |
762 | { | |
763 | int tx_desc = txq->next_desc_to_proc; | |
764 | ||
765 | txq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(txq, tx_desc); | |
766 | return txq->descs + tx_desc; | |
767 | } | |
768 | ||
769 | /* Release the last allocated TX descriptor. Useful to handle DMA | |
6a20c175 TP |
770 | * mapping failures in the TX path. |
771 | */ | |
c5aff182 TP |
772 | static void mvneta_txq_desc_put(struct mvneta_tx_queue *txq) |
773 | { | |
774 | if (txq->next_desc_to_proc == 0) | |
775 | txq->next_desc_to_proc = txq->last_desc - 1; | |
776 | else | |
777 | txq->next_desc_to_proc--; | |
778 | } | |
779 | ||
780 | /* Set rxq buf size */ | |
781 | static void mvneta_rxq_buf_size_set(struct mvneta_port *pp, | |
782 | struct mvneta_rx_queue *rxq, | |
783 | int buf_size) | |
784 | { | |
785 | u32 val; | |
786 | ||
787 | val = mvreg_read(pp, MVNETA_RXQ_SIZE_REG(rxq->id)); | |
788 | ||
789 | val &= ~MVNETA_RXQ_BUF_SIZE_MASK; | |
790 | val |= ((buf_size >> 3) << MVNETA_RXQ_BUF_SIZE_SHIFT); | |
791 | ||
792 | mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), val); | |
793 | } | |
794 | ||
795 | /* Disable buffer management (BM) */ | |
796 | static void mvneta_rxq_bm_disable(struct mvneta_port *pp, | |
797 | struct mvneta_rx_queue *rxq) | |
798 | { | |
799 | u32 val; | |
800 | ||
801 | val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id)); | |
802 | val &= ~MVNETA_RXQ_HW_BUF_ALLOC; | |
803 | mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val); | |
804 | } | |
805 | ||
c5aff182 TP |
806 | /* Start the Ethernet port RX and TX activity */ |
807 | static void mvneta_port_up(struct mvneta_port *pp) | |
808 | { | |
809 | int queue; | |
810 | u32 q_map; | |
811 | ||
812 | /* Enable all initialized TXs. */ | |
c5aff182 TP |
813 | q_map = 0; |
814 | for (queue = 0; queue < txq_number; queue++) { | |
815 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
816 | if (txq->descs != NULL) | |
817 | q_map |= (1 << queue); | |
818 | } | |
819 | mvreg_write(pp, MVNETA_TXQ_CMD, q_map); | |
820 | ||
821 | /* Enable all initialized RXQs. */ | |
d8936657 | 822 | mvreg_write(pp, MVNETA_RXQ_CMD, BIT(rxq_def)); |
c5aff182 TP |
823 | } |
824 | ||
825 | /* Stop the Ethernet port activity */ | |
826 | static void mvneta_port_down(struct mvneta_port *pp) | |
827 | { | |
828 | u32 val; | |
829 | int count; | |
830 | ||
831 | /* Stop Rx port activity. Check port Rx activity. */ | |
832 | val = mvreg_read(pp, MVNETA_RXQ_CMD) & MVNETA_RXQ_ENABLE_MASK; | |
833 | ||
834 | /* Issue stop command for active channels only */ | |
835 | if (val != 0) | |
836 | mvreg_write(pp, MVNETA_RXQ_CMD, | |
837 | val << MVNETA_RXQ_DISABLE_SHIFT); | |
838 | ||
839 | /* Wait for all Rx activity to terminate. */ | |
840 | count = 0; | |
841 | do { | |
842 | if (count++ >= MVNETA_RX_DISABLE_TIMEOUT_MSEC) { | |
843 | netdev_warn(pp->dev, | |
844 | "TIMEOUT for RX stopped ! rx_queue_cmd: 0x08%x\n", | |
845 | val); | |
846 | break; | |
847 | } | |
848 | mdelay(1); | |
849 | ||
850 | val = mvreg_read(pp, MVNETA_RXQ_CMD); | |
851 | } while (val & 0xff); | |
852 | ||
853 | /* Stop Tx port activity. Check port Tx activity. Issue stop | |
6a20c175 TP |
854 | * command for active channels only |
855 | */ | |
c5aff182 TP |
856 | val = (mvreg_read(pp, MVNETA_TXQ_CMD)) & MVNETA_TXQ_ENABLE_MASK; |
857 | ||
858 | if (val != 0) | |
859 | mvreg_write(pp, MVNETA_TXQ_CMD, | |
860 | (val << MVNETA_TXQ_DISABLE_SHIFT)); | |
861 | ||
862 | /* Wait for all Tx activity to terminate. */ | |
863 | count = 0; | |
864 | do { | |
865 | if (count++ >= MVNETA_TX_DISABLE_TIMEOUT_MSEC) { | |
866 | netdev_warn(pp->dev, | |
867 | "TIMEOUT for TX stopped status=0x%08x\n", | |
868 | val); | |
869 | break; | |
870 | } | |
871 | mdelay(1); | |
872 | ||
873 | /* Check TX Command reg that all Txqs are stopped */ | |
874 | val = mvreg_read(pp, MVNETA_TXQ_CMD); | |
875 | ||
876 | } while (val & 0xff); | |
877 | ||
878 | /* Double check to verify that TX FIFO is empty */ | |
879 | count = 0; | |
880 | do { | |
881 | if (count++ >= MVNETA_TX_FIFO_EMPTY_TIMEOUT) { | |
882 | netdev_warn(pp->dev, | |
883 | "TX FIFO empty timeout status=0x08%x\n", | |
884 | val); | |
885 | break; | |
886 | } | |
887 | mdelay(1); | |
888 | ||
889 | val = mvreg_read(pp, MVNETA_PORT_STATUS); | |
890 | } while (!(val & MVNETA_TX_FIFO_EMPTY) && | |
891 | (val & MVNETA_TX_IN_PRGRS)); | |
892 | ||
893 | udelay(200); | |
894 | } | |
895 | ||
896 | /* Enable the port by setting the port enable bit of the MAC control register */ | |
897 | static void mvneta_port_enable(struct mvneta_port *pp) | |
898 | { | |
899 | u32 val; | |
900 | ||
901 | /* Enable port */ | |
902 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
903 | val |= MVNETA_GMAC0_PORT_ENABLE; | |
904 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
905 | } | |
906 | ||
907 | /* Disable the port and wait for about 200 usec before retuning */ | |
908 | static void mvneta_port_disable(struct mvneta_port *pp) | |
909 | { | |
910 | u32 val; | |
911 | ||
912 | /* Reset the Enable bit in the Serial Control Register */ | |
913 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
914 | val &= ~MVNETA_GMAC0_PORT_ENABLE; | |
915 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
916 | ||
917 | udelay(200); | |
918 | } | |
919 | ||
920 | /* Multicast tables methods */ | |
921 | ||
922 | /* Set all entries in Unicast MAC Table; queue==-1 means reject all */ | |
923 | static void mvneta_set_ucast_table(struct mvneta_port *pp, int queue) | |
924 | { | |
925 | int offset; | |
926 | u32 val; | |
927 | ||
928 | if (queue == -1) { | |
929 | val = 0; | |
930 | } else { | |
931 | val = 0x1 | (queue << 1); | |
932 | val |= (val << 24) | (val << 16) | (val << 8); | |
933 | } | |
934 | ||
935 | for (offset = 0; offset <= 0xc; offset += 4) | |
936 | mvreg_write(pp, MVNETA_DA_FILT_UCAST_BASE + offset, val); | |
937 | } | |
938 | ||
939 | /* Set all entries in Special Multicast MAC Table; queue==-1 means reject all */ | |
940 | static void mvneta_set_special_mcast_table(struct mvneta_port *pp, int queue) | |
941 | { | |
942 | int offset; | |
943 | u32 val; | |
944 | ||
945 | if (queue == -1) { | |
946 | val = 0; | |
947 | } else { | |
948 | val = 0x1 | (queue << 1); | |
949 | val |= (val << 24) | (val << 16) | (val << 8); | |
950 | } | |
951 | ||
952 | for (offset = 0; offset <= 0xfc; offset += 4) | |
953 | mvreg_write(pp, MVNETA_DA_FILT_SPEC_MCAST + offset, val); | |
954 | ||
955 | } | |
956 | ||
957 | /* Set all entries in Other Multicast MAC Table. queue==-1 means reject all */ | |
958 | static void mvneta_set_other_mcast_table(struct mvneta_port *pp, int queue) | |
959 | { | |
960 | int offset; | |
961 | u32 val; | |
962 | ||
963 | if (queue == -1) { | |
964 | memset(pp->mcast_count, 0, sizeof(pp->mcast_count)); | |
965 | val = 0; | |
966 | } else { | |
967 | memset(pp->mcast_count, 1, sizeof(pp->mcast_count)); | |
968 | val = 0x1 | (queue << 1); | |
969 | val |= (val << 24) | (val << 16) | (val << 8); | |
970 | } | |
971 | ||
972 | for (offset = 0; offset <= 0xfc; offset += 4) | |
973 | mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + offset, val); | |
974 | } | |
975 | ||
0c0744fc SS |
976 | static void mvneta_set_autoneg(struct mvneta_port *pp, int enable) |
977 | { | |
978 | u32 val; | |
979 | ||
980 | if (enable) { | |
981 | val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
982 | val &= ~(MVNETA_GMAC_FORCE_LINK_PASS | | |
983 | MVNETA_GMAC_FORCE_LINK_DOWN | | |
984 | MVNETA_GMAC_AN_FLOW_CTRL_EN); | |
985 | val |= MVNETA_GMAC_INBAND_AN_ENABLE | | |
986 | MVNETA_GMAC_AN_SPEED_EN | | |
987 | MVNETA_GMAC_AN_DUPLEX_EN; | |
988 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
989 | ||
990 | val = mvreg_read(pp, MVNETA_GMAC_CLOCK_DIVIDER); | |
991 | val |= MVNETA_GMAC_1MS_CLOCK_ENABLE; | |
992 | mvreg_write(pp, MVNETA_GMAC_CLOCK_DIVIDER, val); | |
993 | ||
994 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_2); | |
995 | val |= MVNETA_GMAC2_INBAND_AN_ENABLE; | |
996 | mvreg_write(pp, MVNETA_GMAC_CTRL_2, val); | |
997 | } else { | |
998 | val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
999 | val &= ~(MVNETA_GMAC_INBAND_AN_ENABLE | | |
1000 | MVNETA_GMAC_AN_SPEED_EN | | |
1001 | MVNETA_GMAC_AN_DUPLEX_EN); | |
1002 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
1003 | ||
1004 | val = mvreg_read(pp, MVNETA_GMAC_CLOCK_DIVIDER); | |
1005 | val &= ~MVNETA_GMAC_1MS_CLOCK_ENABLE; | |
1006 | mvreg_write(pp, MVNETA_GMAC_CLOCK_DIVIDER, val); | |
1007 | ||
1008 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_2); | |
1009 | val &= ~MVNETA_GMAC2_INBAND_AN_ENABLE; | |
1010 | mvreg_write(pp, MVNETA_GMAC_CTRL_2, val); | |
1011 | } | |
1012 | } | |
1013 | ||
c5aff182 TP |
1014 | /* This method sets defaults to the NETA port: |
1015 | * Clears interrupt Cause and Mask registers. | |
1016 | * Clears all MAC tables. | |
1017 | * Sets defaults to all registers. | |
1018 | * Resets RX and TX descriptor rings. | |
1019 | * Resets PHY. | |
1020 | * This method can be called after mvneta_port_down() to return the port | |
1021 | * settings to defaults. | |
1022 | */ | |
1023 | static void mvneta_defaults_set(struct mvneta_port *pp) | |
1024 | { | |
1025 | int cpu; | |
1026 | int queue; | |
1027 | u32 val; | |
1028 | ||
1029 | /* Clear all Cause registers */ | |
1030 | mvreg_write(pp, MVNETA_INTR_NEW_CAUSE, 0); | |
1031 | mvreg_write(pp, MVNETA_INTR_OLD_CAUSE, 0); | |
1032 | mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0); | |
1033 | ||
1034 | /* Mask all interrupts */ | |
1035 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
1036 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
1037 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
1038 | mvreg_write(pp, MVNETA_INTR_ENABLE, 0); | |
1039 | ||
1040 | /* Enable MBUS Retry bit16 */ | |
1041 | mvreg_write(pp, MVNETA_MBUS_RETRY, 0x20); | |
1042 | ||
1043 | /* Set CPU queue access map - all CPUs have access to all RX | |
6a20c175 TP |
1044 | * queues and to all TX queues |
1045 | */ | |
2502d0ef | 1046 | for_each_present_cpu(cpu) |
c5aff182 TP |
1047 | mvreg_write(pp, MVNETA_CPU_MAP(cpu), |
1048 | (MVNETA_CPU_RXQ_ACCESS_ALL_MASK | | |
1049 | MVNETA_CPU_TXQ_ACCESS_ALL_MASK)); | |
1050 | ||
1051 | /* Reset RX and TX DMAs */ | |
1052 | mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET); | |
1053 | mvreg_write(pp, MVNETA_PORT_TX_RESET, MVNETA_PORT_TX_DMA_RESET); | |
1054 | ||
1055 | /* Disable Legacy WRR, Disable EJP, Release from reset */ | |
1056 | mvreg_write(pp, MVNETA_TXQ_CMD_1, 0); | |
1057 | for (queue = 0; queue < txq_number; queue++) { | |
1058 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(queue), 0); | |
1059 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(queue), 0); | |
1060 | } | |
1061 | ||
1062 | mvreg_write(pp, MVNETA_PORT_TX_RESET, 0); | |
1063 | mvreg_write(pp, MVNETA_PORT_RX_RESET, 0); | |
1064 | ||
1065 | /* Set Port Acceleration Mode */ | |
1066 | val = MVNETA_ACC_MODE_EXT; | |
1067 | mvreg_write(pp, MVNETA_ACC_MODE, val); | |
1068 | ||
1069 | /* Update val of portCfg register accordingly with all RxQueue types */ | |
1070 | val = MVNETA_PORT_CONFIG_DEFL_VALUE(rxq_def); | |
1071 | mvreg_write(pp, MVNETA_PORT_CONFIG, val); | |
1072 | ||
1073 | val = 0; | |
1074 | mvreg_write(pp, MVNETA_PORT_CONFIG_EXTEND, val); | |
1075 | mvreg_write(pp, MVNETA_RX_MIN_FRAME_SIZE, 64); | |
1076 | ||
1077 | /* Build PORT_SDMA_CONFIG_REG */ | |
1078 | val = 0; | |
1079 | ||
1080 | /* Default burst size */ | |
1081 | val |= MVNETA_TX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16); | |
1082 | val |= MVNETA_RX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16); | |
9ad8fef6 | 1083 | val |= MVNETA_RX_NO_DATA_SWAP | MVNETA_TX_NO_DATA_SWAP; |
c5aff182 | 1084 | |
9ad8fef6 TP |
1085 | #if defined(__BIG_ENDIAN) |
1086 | val |= MVNETA_DESC_SWAP; | |
1087 | #endif | |
c5aff182 TP |
1088 | |
1089 | /* Assign port SDMA configuration */ | |
1090 | mvreg_write(pp, MVNETA_SDMA_CONFIG, val); | |
1091 | ||
71408602 TP |
1092 | /* Disable PHY polling in hardware, since we're using the |
1093 | * kernel phylib to do this. | |
1094 | */ | |
1095 | val = mvreg_read(pp, MVNETA_UNIT_CONTROL); | |
1096 | val &= ~MVNETA_PHY_POLLING_ENABLE; | |
1097 | mvreg_write(pp, MVNETA_UNIT_CONTROL, val); | |
1098 | ||
0c0744fc | 1099 | mvneta_set_autoneg(pp, pp->use_inband_status); |
c5aff182 TP |
1100 | mvneta_set_ucast_table(pp, -1); |
1101 | mvneta_set_special_mcast_table(pp, -1); | |
1102 | mvneta_set_other_mcast_table(pp, -1); | |
1103 | ||
1104 | /* Set port interrupt enable register - default enable all */ | |
1105 | mvreg_write(pp, MVNETA_INTR_ENABLE, | |
1106 | (MVNETA_RXQ_INTR_ENABLE_ALL_MASK | |
1107 | | MVNETA_TXQ_INTR_ENABLE_ALL_MASK)); | |
e483911f AL |
1108 | |
1109 | mvneta_mib_counters_clear(pp); | |
c5aff182 TP |
1110 | } |
1111 | ||
1112 | /* Set max sizes for tx queues */ | |
1113 | static void mvneta_txq_max_tx_size_set(struct mvneta_port *pp, int max_tx_size) | |
1114 | ||
1115 | { | |
1116 | u32 val, size, mtu; | |
1117 | int queue; | |
1118 | ||
1119 | mtu = max_tx_size * 8; | |
1120 | if (mtu > MVNETA_TX_MTU_MAX) | |
1121 | mtu = MVNETA_TX_MTU_MAX; | |
1122 | ||
1123 | /* Set MTU */ | |
1124 | val = mvreg_read(pp, MVNETA_TX_MTU); | |
1125 | val &= ~MVNETA_TX_MTU_MAX; | |
1126 | val |= mtu; | |
1127 | mvreg_write(pp, MVNETA_TX_MTU, val); | |
1128 | ||
1129 | /* TX token size and all TXQs token size must be larger that MTU */ | |
1130 | val = mvreg_read(pp, MVNETA_TX_TOKEN_SIZE); | |
1131 | ||
1132 | size = val & MVNETA_TX_TOKEN_SIZE_MAX; | |
1133 | if (size < mtu) { | |
1134 | size = mtu; | |
1135 | val &= ~MVNETA_TX_TOKEN_SIZE_MAX; | |
1136 | val |= size; | |
1137 | mvreg_write(pp, MVNETA_TX_TOKEN_SIZE, val); | |
1138 | } | |
1139 | for (queue = 0; queue < txq_number; queue++) { | |
1140 | val = mvreg_read(pp, MVNETA_TXQ_TOKEN_SIZE_REG(queue)); | |
1141 | ||
1142 | size = val & MVNETA_TXQ_TOKEN_SIZE_MAX; | |
1143 | if (size < mtu) { | |
1144 | size = mtu; | |
1145 | val &= ~MVNETA_TXQ_TOKEN_SIZE_MAX; | |
1146 | val |= size; | |
1147 | mvreg_write(pp, MVNETA_TXQ_TOKEN_SIZE_REG(queue), val); | |
1148 | } | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | /* Set unicast address */ | |
1153 | static void mvneta_set_ucast_addr(struct mvneta_port *pp, u8 last_nibble, | |
1154 | int queue) | |
1155 | { | |
1156 | unsigned int unicast_reg; | |
1157 | unsigned int tbl_offset; | |
1158 | unsigned int reg_offset; | |
1159 | ||
1160 | /* Locate the Unicast table entry */ | |
1161 | last_nibble = (0xf & last_nibble); | |
1162 | ||
1163 | /* offset from unicast tbl base */ | |
1164 | tbl_offset = (last_nibble / 4) * 4; | |
1165 | ||
1166 | /* offset within the above reg */ | |
1167 | reg_offset = last_nibble % 4; | |
1168 | ||
1169 | unicast_reg = mvreg_read(pp, (MVNETA_DA_FILT_UCAST_BASE + tbl_offset)); | |
1170 | ||
1171 | if (queue == -1) { | |
1172 | /* Clear accepts frame bit at specified unicast DA tbl entry */ | |
1173 | unicast_reg &= ~(0xff << (8 * reg_offset)); | |
1174 | } else { | |
1175 | unicast_reg &= ~(0xff << (8 * reg_offset)); | |
1176 | unicast_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
1177 | } | |
1178 | ||
1179 | mvreg_write(pp, (MVNETA_DA_FILT_UCAST_BASE + tbl_offset), unicast_reg); | |
1180 | } | |
1181 | ||
1182 | /* Set mac address */ | |
1183 | static void mvneta_mac_addr_set(struct mvneta_port *pp, unsigned char *addr, | |
1184 | int queue) | |
1185 | { | |
1186 | unsigned int mac_h; | |
1187 | unsigned int mac_l; | |
1188 | ||
1189 | if (queue != -1) { | |
1190 | mac_l = (addr[4] << 8) | (addr[5]); | |
1191 | mac_h = (addr[0] << 24) | (addr[1] << 16) | | |
1192 | (addr[2] << 8) | (addr[3] << 0); | |
1193 | ||
1194 | mvreg_write(pp, MVNETA_MAC_ADDR_LOW, mac_l); | |
1195 | mvreg_write(pp, MVNETA_MAC_ADDR_HIGH, mac_h); | |
1196 | } | |
1197 | ||
1198 | /* Accept frames of this address */ | |
1199 | mvneta_set_ucast_addr(pp, addr[5], queue); | |
1200 | } | |
1201 | ||
6a20c175 TP |
1202 | /* Set the number of packets that will be received before RX interrupt |
1203 | * will be generated by HW. | |
c5aff182 TP |
1204 | */ |
1205 | static void mvneta_rx_pkts_coal_set(struct mvneta_port *pp, | |
1206 | struct mvneta_rx_queue *rxq, u32 value) | |
1207 | { | |
1208 | mvreg_write(pp, MVNETA_RXQ_THRESHOLD_REG(rxq->id), | |
1209 | value | MVNETA_RXQ_NON_OCCUPIED(0)); | |
1210 | rxq->pkts_coal = value; | |
1211 | } | |
1212 | ||
6a20c175 TP |
1213 | /* Set the time delay in usec before RX interrupt will be generated by |
1214 | * HW. | |
c5aff182 TP |
1215 | */ |
1216 | static void mvneta_rx_time_coal_set(struct mvneta_port *pp, | |
1217 | struct mvneta_rx_queue *rxq, u32 value) | |
1218 | { | |
189dd626 TP |
1219 | u32 val; |
1220 | unsigned long clk_rate; | |
1221 | ||
1222 | clk_rate = clk_get_rate(pp->clk); | |
1223 | val = (clk_rate / 1000000) * value; | |
c5aff182 TP |
1224 | |
1225 | mvreg_write(pp, MVNETA_RXQ_TIME_COAL_REG(rxq->id), val); | |
1226 | rxq->time_coal = value; | |
1227 | } | |
1228 | ||
1229 | /* Set threshold for TX_DONE pkts coalescing */ | |
1230 | static void mvneta_tx_done_pkts_coal_set(struct mvneta_port *pp, | |
1231 | struct mvneta_tx_queue *txq, u32 value) | |
1232 | { | |
1233 | u32 val; | |
1234 | ||
1235 | val = mvreg_read(pp, MVNETA_TXQ_SIZE_REG(txq->id)); | |
1236 | ||
1237 | val &= ~MVNETA_TXQ_SENT_THRESH_ALL_MASK; | |
1238 | val |= MVNETA_TXQ_SENT_THRESH_MASK(value); | |
1239 | ||
1240 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), val); | |
1241 | ||
1242 | txq->done_pkts_coal = value; | |
1243 | } | |
1244 | ||
c5aff182 TP |
1245 | /* Handle rx descriptor fill by setting buf_cookie and buf_phys_addr */ |
1246 | static void mvneta_rx_desc_fill(struct mvneta_rx_desc *rx_desc, | |
1247 | u32 phys_addr, u32 cookie) | |
1248 | { | |
1249 | rx_desc->buf_cookie = cookie; | |
1250 | rx_desc->buf_phys_addr = phys_addr; | |
1251 | } | |
1252 | ||
1253 | /* Decrement sent descriptors counter */ | |
1254 | static void mvneta_txq_sent_desc_dec(struct mvneta_port *pp, | |
1255 | struct mvneta_tx_queue *txq, | |
1256 | int sent_desc) | |
1257 | { | |
1258 | u32 val; | |
1259 | ||
1260 | /* Only 255 TX descriptors can be updated at once */ | |
1261 | while (sent_desc > 0xff) { | |
1262 | val = 0xff << MVNETA_TXQ_DEC_SENT_SHIFT; | |
1263 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
1264 | sent_desc = sent_desc - 0xff; | |
1265 | } | |
1266 | ||
1267 | val = sent_desc << MVNETA_TXQ_DEC_SENT_SHIFT; | |
1268 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
1269 | } | |
1270 | ||
1271 | /* Get number of TX descriptors already sent by HW */ | |
1272 | static int mvneta_txq_sent_desc_num_get(struct mvneta_port *pp, | |
1273 | struct mvneta_tx_queue *txq) | |
1274 | { | |
1275 | u32 val; | |
1276 | int sent_desc; | |
1277 | ||
1278 | val = mvreg_read(pp, MVNETA_TXQ_STATUS_REG(txq->id)); | |
1279 | sent_desc = (val & MVNETA_TXQ_SENT_DESC_MASK) >> | |
1280 | MVNETA_TXQ_SENT_DESC_SHIFT; | |
1281 | ||
1282 | return sent_desc; | |
1283 | } | |
1284 | ||
6a20c175 | 1285 | /* Get number of sent descriptors and decrement counter. |
c5aff182 TP |
1286 | * The number of sent descriptors is returned. |
1287 | */ | |
1288 | static int mvneta_txq_sent_desc_proc(struct mvneta_port *pp, | |
1289 | struct mvneta_tx_queue *txq) | |
1290 | { | |
1291 | int sent_desc; | |
1292 | ||
1293 | /* Get number of sent descriptors */ | |
1294 | sent_desc = mvneta_txq_sent_desc_num_get(pp, txq); | |
1295 | ||
1296 | /* Decrement sent descriptors counter */ | |
1297 | if (sent_desc) | |
1298 | mvneta_txq_sent_desc_dec(pp, txq, sent_desc); | |
1299 | ||
1300 | return sent_desc; | |
1301 | } | |
1302 | ||
1303 | /* Set TXQ descriptors fields relevant for CSUM calculation */ | |
1304 | static u32 mvneta_txq_desc_csum(int l3_offs, int l3_proto, | |
1305 | int ip_hdr_len, int l4_proto) | |
1306 | { | |
1307 | u32 command; | |
1308 | ||
1309 | /* Fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk, | |
6a20c175 TP |
1310 | * G_L4_chk, L4_type; required only for checksum |
1311 | * calculation | |
1312 | */ | |
c5aff182 TP |
1313 | command = l3_offs << MVNETA_TX_L3_OFF_SHIFT; |
1314 | command |= ip_hdr_len << MVNETA_TX_IP_HLEN_SHIFT; | |
1315 | ||
0a198587 | 1316 | if (l3_proto == htons(ETH_P_IP)) |
c5aff182 TP |
1317 | command |= MVNETA_TXD_IP_CSUM; |
1318 | else | |
1319 | command |= MVNETA_TX_L3_IP6; | |
1320 | ||
1321 | if (l4_proto == IPPROTO_TCP) | |
1322 | command |= MVNETA_TX_L4_CSUM_FULL; | |
1323 | else if (l4_proto == IPPROTO_UDP) | |
1324 | command |= MVNETA_TX_L4_UDP | MVNETA_TX_L4_CSUM_FULL; | |
1325 | else | |
1326 | command |= MVNETA_TX_L4_CSUM_NOT; | |
1327 | ||
1328 | return command; | |
1329 | } | |
1330 | ||
1331 | ||
1332 | /* Display more error info */ | |
1333 | static void mvneta_rx_error(struct mvneta_port *pp, | |
1334 | struct mvneta_rx_desc *rx_desc) | |
1335 | { | |
1336 | u32 status = rx_desc->status; | |
1337 | ||
5428213c | 1338 | if (!mvneta_rxq_desc_is_first_last(status)) { |
c5aff182 TP |
1339 | netdev_err(pp->dev, |
1340 | "bad rx status %08x (buffer oversize), size=%d\n", | |
5428213c | 1341 | status, rx_desc->data_size); |
c5aff182 TP |
1342 | return; |
1343 | } | |
1344 | ||
1345 | switch (status & MVNETA_RXD_ERR_CODE_MASK) { | |
1346 | case MVNETA_RXD_ERR_CRC: | |
1347 | netdev_err(pp->dev, "bad rx status %08x (crc error), size=%d\n", | |
1348 | status, rx_desc->data_size); | |
1349 | break; | |
1350 | case MVNETA_RXD_ERR_OVERRUN: | |
1351 | netdev_err(pp->dev, "bad rx status %08x (overrun error), size=%d\n", | |
1352 | status, rx_desc->data_size); | |
1353 | break; | |
1354 | case MVNETA_RXD_ERR_LEN: | |
1355 | netdev_err(pp->dev, "bad rx status %08x (max frame length error), size=%d\n", | |
1356 | status, rx_desc->data_size); | |
1357 | break; | |
1358 | case MVNETA_RXD_ERR_RESOURCE: | |
1359 | netdev_err(pp->dev, "bad rx status %08x (resource error), size=%d\n", | |
1360 | status, rx_desc->data_size); | |
1361 | break; | |
1362 | } | |
1363 | } | |
1364 | ||
5428213c | 1365 | /* Handle RX checksum offload based on the descriptor's status */ |
1366 | static void mvneta_rx_csum(struct mvneta_port *pp, u32 status, | |
c5aff182 TP |
1367 | struct sk_buff *skb) |
1368 | { | |
5428213c | 1369 | if ((status & MVNETA_RXD_L3_IP4) && |
1370 | (status & MVNETA_RXD_L4_CSUM_OK)) { | |
c5aff182 TP |
1371 | skb->csum = 0; |
1372 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1373 | return; | |
1374 | } | |
1375 | ||
1376 | skb->ip_summed = CHECKSUM_NONE; | |
1377 | } | |
1378 | ||
6c498974 | 1379 | /* Return tx queue pointer (find last set bit) according to <cause> returned |
1380 | * form tx_done reg. <cause> must not be null. The return value is always a | |
1381 | * valid queue for matching the first one found in <cause>. | |
1382 | */ | |
c5aff182 TP |
1383 | static struct mvneta_tx_queue *mvneta_tx_done_policy(struct mvneta_port *pp, |
1384 | u32 cause) | |
1385 | { | |
1386 | int queue = fls(cause) - 1; | |
1387 | ||
6c498974 | 1388 | return &pp->txqs[queue]; |
c5aff182 TP |
1389 | } |
1390 | ||
1391 | /* Free tx queue skbuffs */ | |
1392 | static void mvneta_txq_bufs_free(struct mvneta_port *pp, | |
1393 | struct mvneta_tx_queue *txq, int num) | |
1394 | { | |
1395 | int i; | |
1396 | ||
1397 | for (i = 0; i < num; i++) { | |
1398 | struct mvneta_tx_desc *tx_desc = txq->descs + | |
1399 | txq->txq_get_index; | |
1400 | struct sk_buff *skb = txq->tx_skb[txq->txq_get_index]; | |
1401 | ||
1402 | mvneta_txq_inc_get(txq); | |
1403 | ||
2e3173a3 EG |
1404 | if (!IS_TSO_HEADER(txq, tx_desc->buf_phys_addr)) |
1405 | dma_unmap_single(pp->dev->dev.parent, | |
1406 | tx_desc->buf_phys_addr, | |
1407 | tx_desc->data_size, DMA_TO_DEVICE); | |
ba7e46ef EG |
1408 | if (!skb) |
1409 | continue; | |
c5aff182 TP |
1410 | dev_kfree_skb_any(skb); |
1411 | } | |
1412 | } | |
1413 | ||
1414 | /* Handle end of transmission */ | |
cd713199 | 1415 | static void mvneta_txq_done(struct mvneta_port *pp, |
c5aff182 TP |
1416 | struct mvneta_tx_queue *txq) |
1417 | { | |
1418 | struct netdev_queue *nq = netdev_get_tx_queue(pp->dev, txq->id); | |
1419 | int tx_done; | |
1420 | ||
1421 | tx_done = mvneta_txq_sent_desc_proc(pp, txq); | |
cd713199 AE |
1422 | if (!tx_done) |
1423 | return; | |
1424 | ||
c5aff182 TP |
1425 | mvneta_txq_bufs_free(pp, txq, tx_done); |
1426 | ||
1427 | txq->count -= tx_done; | |
1428 | ||
1429 | if (netif_tx_queue_stopped(nq)) { | |
8eef5f97 | 1430 | if (txq->count <= txq->tx_wake_threshold) |
c5aff182 TP |
1431 | netif_tx_wake_queue(nq); |
1432 | } | |
c5aff182 TP |
1433 | } |
1434 | ||
8ec2cd48 | 1435 | static void *mvneta_frag_alloc(const struct mvneta_port *pp) |
1436 | { | |
1437 | if (likely(pp->frag_size <= PAGE_SIZE)) | |
1438 | return netdev_alloc_frag(pp->frag_size); | |
1439 | else | |
1440 | return kmalloc(pp->frag_size, GFP_ATOMIC); | |
1441 | } | |
1442 | ||
1443 | static void mvneta_frag_free(const struct mvneta_port *pp, void *data) | |
1444 | { | |
1445 | if (likely(pp->frag_size <= PAGE_SIZE)) | |
13dc0d2b | 1446 | skb_free_frag(data); |
8ec2cd48 | 1447 | else |
1448 | kfree(data); | |
1449 | } | |
1450 | ||
c5aff182 TP |
1451 | /* Refill processing */ |
1452 | static int mvneta_rx_refill(struct mvneta_port *pp, | |
1453 | struct mvneta_rx_desc *rx_desc) | |
1454 | ||
1455 | { | |
1456 | dma_addr_t phys_addr; | |
8ec2cd48 | 1457 | void *data; |
c5aff182 | 1458 | |
8ec2cd48 | 1459 | data = mvneta_frag_alloc(pp); |
1460 | if (!data) | |
c5aff182 TP |
1461 | return -ENOMEM; |
1462 | ||
8ec2cd48 | 1463 | phys_addr = dma_map_single(pp->dev->dev.parent, data, |
c5aff182 TP |
1464 | MVNETA_RX_BUF_SIZE(pp->pkt_size), |
1465 | DMA_FROM_DEVICE); | |
1466 | if (unlikely(dma_mapping_error(pp->dev->dev.parent, phys_addr))) { | |
8ec2cd48 | 1467 | mvneta_frag_free(pp, data); |
c5aff182 TP |
1468 | return -ENOMEM; |
1469 | } | |
1470 | ||
8ec2cd48 | 1471 | mvneta_rx_desc_fill(rx_desc, phys_addr, (u32)data); |
c5aff182 TP |
1472 | return 0; |
1473 | } | |
1474 | ||
1475 | /* Handle tx checksum */ | |
1476 | static u32 mvneta_skb_tx_csum(struct mvneta_port *pp, struct sk_buff *skb) | |
1477 | { | |
1478 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
1479 | int ip_hdr_len = 0; | |
817dbfa5 | 1480 | __be16 l3_proto = vlan_get_protocol(skb); |
c5aff182 TP |
1481 | u8 l4_proto; |
1482 | ||
817dbfa5 | 1483 | if (l3_proto == htons(ETH_P_IP)) { |
c5aff182 TP |
1484 | struct iphdr *ip4h = ip_hdr(skb); |
1485 | ||
1486 | /* Calculate IPv4 checksum and L4 checksum */ | |
1487 | ip_hdr_len = ip4h->ihl; | |
1488 | l4_proto = ip4h->protocol; | |
817dbfa5 | 1489 | } else if (l3_proto == htons(ETH_P_IPV6)) { |
c5aff182 TP |
1490 | struct ipv6hdr *ip6h = ipv6_hdr(skb); |
1491 | ||
1492 | /* Read l4_protocol from one of IPv6 extra headers */ | |
1493 | if (skb_network_header_len(skb) > 0) | |
1494 | ip_hdr_len = (skb_network_header_len(skb) >> 2); | |
1495 | l4_proto = ip6h->nexthdr; | |
1496 | } else | |
1497 | return MVNETA_TX_L4_CSUM_NOT; | |
1498 | ||
1499 | return mvneta_txq_desc_csum(skb_network_offset(skb), | |
817dbfa5 | 1500 | l3_proto, ip_hdr_len, l4_proto); |
c5aff182 TP |
1501 | } |
1502 | ||
1503 | return MVNETA_TX_L4_CSUM_NOT; | |
1504 | } | |
1505 | ||
c5aff182 TP |
1506 | /* Drop packets received by the RXQ and free buffers */ |
1507 | static void mvneta_rxq_drop_pkts(struct mvneta_port *pp, | |
1508 | struct mvneta_rx_queue *rxq) | |
1509 | { | |
1510 | int rx_done, i; | |
1511 | ||
1512 | rx_done = mvneta_rxq_busy_desc_num_get(pp, rxq); | |
1513 | for (i = 0; i < rxq->size; i++) { | |
1514 | struct mvneta_rx_desc *rx_desc = rxq->descs + i; | |
8ec2cd48 | 1515 | void *data = (void *)rx_desc->buf_cookie; |
c5aff182 | 1516 | |
c5aff182 | 1517 | dma_unmap_single(pp->dev->dev.parent, rx_desc->buf_phys_addr, |
a328f3a0 | 1518 | MVNETA_RX_BUF_SIZE(pp->pkt_size), DMA_FROM_DEVICE); |
8c94ddbc | 1519 | mvneta_frag_free(pp, data); |
c5aff182 TP |
1520 | } |
1521 | ||
1522 | if (rx_done) | |
1523 | mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_done); | |
1524 | } | |
1525 | ||
1526 | /* Main rx processing */ | |
1527 | static int mvneta_rx(struct mvneta_port *pp, int rx_todo, | |
1528 | struct mvneta_rx_queue *rxq) | |
1529 | { | |
12bb03b4 | 1530 | struct mvneta_pcpu_port *port = this_cpu_ptr(pp->ports); |
c5aff182 | 1531 | struct net_device *dev = pp->dev; |
a84e3289 | 1532 | int rx_done; |
dc4277dd | 1533 | u32 rcvd_pkts = 0; |
1534 | u32 rcvd_bytes = 0; | |
c5aff182 TP |
1535 | |
1536 | /* Get number of received packets */ | |
1537 | rx_done = mvneta_rxq_busy_desc_num_get(pp, rxq); | |
1538 | ||
1539 | if (rx_todo > rx_done) | |
1540 | rx_todo = rx_done; | |
1541 | ||
1542 | rx_done = 0; | |
c5aff182 TP |
1543 | |
1544 | /* Fairness NAPI loop */ | |
1545 | while (rx_done < rx_todo) { | |
1546 | struct mvneta_rx_desc *rx_desc = mvneta_rxq_next_desc_get(rxq); | |
1547 | struct sk_buff *skb; | |
8ec2cd48 | 1548 | unsigned char *data; |
daf158d0 | 1549 | dma_addr_t phys_addr; |
c5aff182 TP |
1550 | u32 rx_status; |
1551 | int rx_bytes, err; | |
1552 | ||
c5aff182 | 1553 | rx_done++; |
c5aff182 | 1554 | rx_status = rx_desc->status; |
f19fadfc | 1555 | rx_bytes = rx_desc->data_size - (ETH_FCS_LEN + MVNETA_MH_SIZE); |
8ec2cd48 | 1556 | data = (unsigned char *)rx_desc->buf_cookie; |
daf158d0 | 1557 | phys_addr = rx_desc->buf_phys_addr; |
c5aff182 | 1558 | |
5428213c | 1559 | if (!mvneta_rxq_desc_is_first_last(rx_status) || |
f19fadfc | 1560 | (rx_status & MVNETA_RXD_ERR_SUMMARY)) { |
1561 | err_drop_frame: | |
c5aff182 TP |
1562 | dev->stats.rx_errors++; |
1563 | mvneta_rx_error(pp, rx_desc); | |
8ec2cd48 | 1564 | /* leave the descriptor untouched */ |
c5aff182 TP |
1565 | continue; |
1566 | } | |
1567 | ||
f19fadfc | 1568 | if (rx_bytes <= rx_copybreak) { |
1569 | /* better copy a small frame and not unmap the DMA region */ | |
1570 | skb = netdev_alloc_skb_ip_align(dev, rx_bytes); | |
1571 | if (unlikely(!skb)) | |
1572 | goto err_drop_frame; | |
1573 | ||
1574 | dma_sync_single_range_for_cpu(dev->dev.parent, | |
1575 | rx_desc->buf_phys_addr, | |
1576 | MVNETA_MH_SIZE + NET_SKB_PAD, | |
1577 | rx_bytes, | |
1578 | DMA_FROM_DEVICE); | |
1579 | memcpy(skb_put(skb, rx_bytes), | |
1580 | data + MVNETA_MH_SIZE + NET_SKB_PAD, | |
1581 | rx_bytes); | |
1582 | ||
1583 | skb->protocol = eth_type_trans(skb, dev); | |
1584 | mvneta_rx_csum(pp, rx_status, skb); | |
12bb03b4 | 1585 | napi_gro_receive(&port->napi, skb); |
f19fadfc | 1586 | |
1587 | rcvd_pkts++; | |
1588 | rcvd_bytes += rx_bytes; | |
1589 | ||
1590 | /* leave the descriptor and buffer untouched */ | |
1591 | continue; | |
1592 | } | |
1593 | ||
a84e3289 SG |
1594 | /* Refill processing */ |
1595 | err = mvneta_rx_refill(pp, rx_desc); | |
1596 | if (err) { | |
1597 | netdev_err(dev, "Linux processing - Can't refill\n"); | |
1598 | rxq->missed++; | |
1599 | goto err_drop_frame; | |
1600 | } | |
1601 | ||
f19fadfc | 1602 | skb = build_skb(data, pp->frag_size > PAGE_SIZE ? 0 : pp->frag_size); |
f19fadfc | 1603 | |
26c17a17 MW |
1604 | /* After refill old buffer has to be unmapped regardless |
1605 | * the skb is successfully built or not. | |
1606 | */ | |
daf158d0 | 1607 | dma_unmap_single(dev->dev.parent, phys_addr, |
a328f3a0 | 1608 | MVNETA_RX_BUF_SIZE(pp->pkt_size), DMA_FROM_DEVICE); |
c5aff182 | 1609 | |
26c17a17 MW |
1610 | if (!skb) |
1611 | goto err_drop_frame; | |
1612 | ||
dc4277dd | 1613 | rcvd_pkts++; |
1614 | rcvd_bytes += rx_bytes; | |
c5aff182 TP |
1615 | |
1616 | /* Linux processing */ | |
8ec2cd48 | 1617 | skb_reserve(skb, MVNETA_MH_SIZE + NET_SKB_PAD); |
c5aff182 TP |
1618 | skb_put(skb, rx_bytes); |
1619 | ||
1620 | skb->protocol = eth_type_trans(skb, dev); | |
1621 | ||
5428213c | 1622 | mvneta_rx_csum(pp, rx_status, skb); |
c5aff182 | 1623 | |
12bb03b4 | 1624 | napi_gro_receive(&port->napi, skb); |
c5aff182 TP |
1625 | } |
1626 | ||
dc4277dd | 1627 | if (rcvd_pkts) { |
74c41b04 | 1628 | struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats); |
1629 | ||
1630 | u64_stats_update_begin(&stats->syncp); | |
1631 | stats->rx_packets += rcvd_pkts; | |
1632 | stats->rx_bytes += rcvd_bytes; | |
1633 | u64_stats_update_end(&stats->syncp); | |
dc4277dd | 1634 | } |
1635 | ||
c5aff182 | 1636 | /* Update rxq management counters */ |
a84e3289 | 1637 | mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_done); |
c5aff182 TP |
1638 | |
1639 | return rx_done; | |
1640 | } | |
1641 | ||
2adb719d EG |
1642 | static inline void |
1643 | mvneta_tso_put_hdr(struct sk_buff *skb, | |
1644 | struct mvneta_port *pp, struct mvneta_tx_queue *txq) | |
1645 | { | |
1646 | struct mvneta_tx_desc *tx_desc; | |
1647 | int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
1648 | ||
1649 | txq->tx_skb[txq->txq_put_index] = NULL; | |
1650 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1651 | tx_desc->data_size = hdr_len; | |
1652 | tx_desc->command = mvneta_skb_tx_csum(pp, skb); | |
1653 | tx_desc->command |= MVNETA_TXD_F_DESC; | |
1654 | tx_desc->buf_phys_addr = txq->tso_hdrs_phys + | |
1655 | txq->txq_put_index * TSO_HEADER_SIZE; | |
1656 | mvneta_txq_inc_put(txq); | |
1657 | } | |
1658 | ||
1659 | static inline int | |
1660 | mvneta_tso_put_data(struct net_device *dev, struct mvneta_tx_queue *txq, | |
1661 | struct sk_buff *skb, char *data, int size, | |
1662 | bool last_tcp, bool is_last) | |
1663 | { | |
1664 | struct mvneta_tx_desc *tx_desc; | |
1665 | ||
1666 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1667 | tx_desc->data_size = size; | |
1668 | tx_desc->buf_phys_addr = dma_map_single(dev->dev.parent, data, | |
1669 | size, DMA_TO_DEVICE); | |
1670 | if (unlikely(dma_mapping_error(dev->dev.parent, | |
1671 | tx_desc->buf_phys_addr))) { | |
1672 | mvneta_txq_desc_put(txq); | |
1673 | return -ENOMEM; | |
1674 | } | |
1675 | ||
1676 | tx_desc->command = 0; | |
1677 | txq->tx_skb[txq->txq_put_index] = NULL; | |
1678 | ||
1679 | if (last_tcp) { | |
1680 | /* last descriptor in the TCP packet */ | |
1681 | tx_desc->command = MVNETA_TXD_L_DESC; | |
1682 | ||
1683 | /* last descriptor in SKB */ | |
1684 | if (is_last) | |
1685 | txq->tx_skb[txq->txq_put_index] = skb; | |
1686 | } | |
1687 | mvneta_txq_inc_put(txq); | |
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | static int mvneta_tx_tso(struct sk_buff *skb, struct net_device *dev, | |
1692 | struct mvneta_tx_queue *txq) | |
1693 | { | |
1694 | int total_len, data_left; | |
1695 | int desc_count = 0; | |
1696 | struct mvneta_port *pp = netdev_priv(dev); | |
1697 | struct tso_t tso; | |
1698 | int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
1699 | int i; | |
1700 | ||
1701 | /* Count needed descriptors */ | |
1702 | if ((txq->count + tso_count_descs(skb)) >= txq->size) | |
1703 | return 0; | |
1704 | ||
1705 | if (skb_headlen(skb) < (skb_transport_offset(skb) + tcp_hdrlen(skb))) { | |
1706 | pr_info("*** Is this even possible???!?!?\n"); | |
1707 | return 0; | |
1708 | } | |
1709 | ||
1710 | /* Initialize the TSO handler, and prepare the first payload */ | |
1711 | tso_start(skb, &tso); | |
1712 | ||
1713 | total_len = skb->len - hdr_len; | |
1714 | while (total_len > 0) { | |
1715 | char *hdr; | |
1716 | ||
1717 | data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); | |
1718 | total_len -= data_left; | |
1719 | desc_count++; | |
1720 | ||
1721 | /* prepare packet headers: MAC + IP + TCP */ | |
1722 | hdr = txq->tso_hdrs + txq->txq_put_index * TSO_HEADER_SIZE; | |
1723 | tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); | |
1724 | ||
1725 | mvneta_tso_put_hdr(skb, pp, txq); | |
1726 | ||
1727 | while (data_left > 0) { | |
1728 | int size; | |
1729 | desc_count++; | |
1730 | ||
1731 | size = min_t(int, tso.size, data_left); | |
1732 | ||
1733 | if (mvneta_tso_put_data(dev, txq, skb, | |
1734 | tso.data, size, | |
1735 | size == data_left, | |
1736 | total_len == 0)) | |
1737 | goto err_release; | |
1738 | data_left -= size; | |
1739 | ||
1740 | tso_build_data(skb, &tso, size); | |
1741 | } | |
1742 | } | |
1743 | ||
1744 | return desc_count; | |
1745 | ||
1746 | err_release: | |
1747 | /* Release all used data descriptors; header descriptors must not | |
1748 | * be DMA-unmapped. | |
1749 | */ | |
1750 | for (i = desc_count - 1; i >= 0; i--) { | |
1751 | struct mvneta_tx_desc *tx_desc = txq->descs + i; | |
2e3173a3 | 1752 | if (!IS_TSO_HEADER(txq, tx_desc->buf_phys_addr)) |
2adb719d EG |
1753 | dma_unmap_single(pp->dev->dev.parent, |
1754 | tx_desc->buf_phys_addr, | |
1755 | tx_desc->data_size, | |
1756 | DMA_TO_DEVICE); | |
1757 | mvneta_txq_desc_put(txq); | |
1758 | } | |
1759 | return 0; | |
1760 | } | |
1761 | ||
c5aff182 TP |
1762 | /* Handle tx fragmentation processing */ |
1763 | static int mvneta_tx_frag_process(struct mvneta_port *pp, struct sk_buff *skb, | |
1764 | struct mvneta_tx_queue *txq) | |
1765 | { | |
1766 | struct mvneta_tx_desc *tx_desc; | |
3d4ea02f | 1767 | int i, nr_frags = skb_shinfo(skb)->nr_frags; |
c5aff182 | 1768 | |
3d4ea02f | 1769 | for (i = 0; i < nr_frags; i++) { |
c5aff182 TP |
1770 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
1771 | void *addr = page_address(frag->page.p) + frag->page_offset; | |
1772 | ||
1773 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1774 | tx_desc->data_size = frag->size; | |
1775 | ||
1776 | tx_desc->buf_phys_addr = | |
1777 | dma_map_single(pp->dev->dev.parent, addr, | |
1778 | tx_desc->data_size, DMA_TO_DEVICE); | |
1779 | ||
1780 | if (dma_mapping_error(pp->dev->dev.parent, | |
1781 | tx_desc->buf_phys_addr)) { | |
1782 | mvneta_txq_desc_put(txq); | |
1783 | goto error; | |
1784 | } | |
1785 | ||
3d4ea02f | 1786 | if (i == nr_frags - 1) { |
c5aff182 TP |
1787 | /* Last descriptor */ |
1788 | tx_desc->command = MVNETA_TXD_L_DESC | MVNETA_TXD_Z_PAD; | |
c5aff182 | 1789 | txq->tx_skb[txq->txq_put_index] = skb; |
c5aff182 TP |
1790 | } else { |
1791 | /* Descriptor in the middle: Not First, Not Last */ | |
1792 | tx_desc->command = 0; | |
c5aff182 | 1793 | txq->tx_skb[txq->txq_put_index] = NULL; |
c5aff182 | 1794 | } |
3d4ea02f | 1795 | mvneta_txq_inc_put(txq); |
c5aff182 TP |
1796 | } |
1797 | ||
1798 | return 0; | |
1799 | ||
1800 | error: | |
1801 | /* Release all descriptors that were used to map fragments of | |
6a20c175 TP |
1802 | * this packet, as well as the corresponding DMA mappings |
1803 | */ | |
c5aff182 TP |
1804 | for (i = i - 1; i >= 0; i--) { |
1805 | tx_desc = txq->descs + i; | |
1806 | dma_unmap_single(pp->dev->dev.parent, | |
1807 | tx_desc->buf_phys_addr, | |
1808 | tx_desc->data_size, | |
1809 | DMA_TO_DEVICE); | |
1810 | mvneta_txq_desc_put(txq); | |
1811 | } | |
1812 | ||
1813 | return -ENOMEM; | |
1814 | } | |
1815 | ||
1816 | /* Main tx processing */ | |
1817 | static int mvneta_tx(struct sk_buff *skb, struct net_device *dev) | |
1818 | { | |
1819 | struct mvneta_port *pp = netdev_priv(dev); | |
ee40a116 WT |
1820 | u16 txq_id = skb_get_queue_mapping(skb); |
1821 | struct mvneta_tx_queue *txq = &pp->txqs[txq_id]; | |
c5aff182 | 1822 | struct mvneta_tx_desc *tx_desc; |
5f478b41 | 1823 | int len = skb->len; |
c5aff182 TP |
1824 | int frags = 0; |
1825 | u32 tx_cmd; | |
1826 | ||
1827 | if (!netif_running(dev)) | |
1828 | goto out; | |
1829 | ||
2adb719d EG |
1830 | if (skb_is_gso(skb)) { |
1831 | frags = mvneta_tx_tso(skb, dev, txq); | |
1832 | goto out; | |
1833 | } | |
1834 | ||
c5aff182 | 1835 | frags = skb_shinfo(skb)->nr_frags + 1; |
c5aff182 TP |
1836 | |
1837 | /* Get a descriptor for the first part of the packet */ | |
1838 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1839 | ||
1840 | tx_cmd = mvneta_skb_tx_csum(pp, skb); | |
1841 | ||
1842 | tx_desc->data_size = skb_headlen(skb); | |
1843 | ||
1844 | tx_desc->buf_phys_addr = dma_map_single(dev->dev.parent, skb->data, | |
1845 | tx_desc->data_size, | |
1846 | DMA_TO_DEVICE); | |
1847 | if (unlikely(dma_mapping_error(dev->dev.parent, | |
1848 | tx_desc->buf_phys_addr))) { | |
1849 | mvneta_txq_desc_put(txq); | |
1850 | frags = 0; | |
1851 | goto out; | |
1852 | } | |
1853 | ||
1854 | if (frags == 1) { | |
1855 | /* First and Last descriptor */ | |
1856 | tx_cmd |= MVNETA_TXD_FLZ_DESC; | |
1857 | tx_desc->command = tx_cmd; | |
1858 | txq->tx_skb[txq->txq_put_index] = skb; | |
1859 | mvneta_txq_inc_put(txq); | |
1860 | } else { | |
1861 | /* First but not Last */ | |
1862 | tx_cmd |= MVNETA_TXD_F_DESC; | |
1863 | txq->tx_skb[txq->txq_put_index] = NULL; | |
1864 | mvneta_txq_inc_put(txq); | |
1865 | tx_desc->command = tx_cmd; | |
1866 | /* Continue with other skb fragments */ | |
1867 | if (mvneta_tx_frag_process(pp, skb, txq)) { | |
1868 | dma_unmap_single(dev->dev.parent, | |
1869 | tx_desc->buf_phys_addr, | |
1870 | tx_desc->data_size, | |
1871 | DMA_TO_DEVICE); | |
1872 | mvneta_txq_desc_put(txq); | |
1873 | frags = 0; | |
1874 | goto out; | |
1875 | } | |
1876 | } | |
1877 | ||
c5aff182 TP |
1878 | out: |
1879 | if (frags > 0) { | |
74c41b04 | 1880 | struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats); |
e19d2dda EG |
1881 | struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id); |
1882 | ||
1883 | txq->count += frags; | |
1884 | mvneta_txq_pend_desc_add(pp, txq, frags); | |
1885 | ||
8eef5f97 | 1886 | if (txq->count >= txq->tx_stop_threshold) |
e19d2dda | 1887 | netif_tx_stop_queue(nq); |
c5aff182 | 1888 | |
74c41b04 | 1889 | u64_stats_update_begin(&stats->syncp); |
1890 | stats->tx_packets++; | |
5f478b41 | 1891 | stats->tx_bytes += len; |
74c41b04 | 1892 | u64_stats_update_end(&stats->syncp); |
c5aff182 TP |
1893 | } else { |
1894 | dev->stats.tx_dropped++; | |
1895 | dev_kfree_skb_any(skb); | |
1896 | } | |
1897 | ||
c5aff182 TP |
1898 | return NETDEV_TX_OK; |
1899 | } | |
1900 | ||
1901 | ||
1902 | /* Free tx resources, when resetting a port */ | |
1903 | static void mvneta_txq_done_force(struct mvneta_port *pp, | |
1904 | struct mvneta_tx_queue *txq) | |
1905 | ||
1906 | { | |
1907 | int tx_done = txq->count; | |
1908 | ||
1909 | mvneta_txq_bufs_free(pp, txq, tx_done); | |
1910 | ||
1911 | /* reset txq */ | |
1912 | txq->count = 0; | |
1913 | txq->txq_put_index = 0; | |
1914 | txq->txq_get_index = 0; | |
1915 | } | |
1916 | ||
6c498974 | 1917 | /* Handle tx done - called in softirq context. The <cause_tx_done> argument |
1918 | * must be a valid cause according to MVNETA_TXQ_INTR_MASK_ALL. | |
1919 | */ | |
0713a86a | 1920 | static void mvneta_tx_done_gbe(struct mvneta_port *pp, u32 cause_tx_done) |
c5aff182 TP |
1921 | { |
1922 | struct mvneta_tx_queue *txq; | |
c5aff182 TP |
1923 | struct netdev_queue *nq; |
1924 | ||
6c498974 | 1925 | while (cause_tx_done) { |
c5aff182 | 1926 | txq = mvneta_tx_done_policy(pp, cause_tx_done); |
c5aff182 TP |
1927 | |
1928 | nq = netdev_get_tx_queue(pp->dev, txq->id); | |
1929 | __netif_tx_lock(nq, smp_processor_id()); | |
1930 | ||
0713a86a AE |
1931 | if (txq->count) |
1932 | mvneta_txq_done(pp, txq); | |
c5aff182 TP |
1933 | |
1934 | __netif_tx_unlock(nq); | |
1935 | cause_tx_done &= ~((1 << txq->id)); | |
1936 | } | |
c5aff182 TP |
1937 | } |
1938 | ||
6a20c175 | 1939 | /* Compute crc8 of the specified address, using a unique algorithm , |
c5aff182 TP |
1940 | * according to hw spec, different than generic crc8 algorithm |
1941 | */ | |
1942 | static int mvneta_addr_crc(unsigned char *addr) | |
1943 | { | |
1944 | int crc = 0; | |
1945 | int i; | |
1946 | ||
1947 | for (i = 0; i < ETH_ALEN; i++) { | |
1948 | int j; | |
1949 | ||
1950 | crc = (crc ^ addr[i]) << 8; | |
1951 | for (j = 7; j >= 0; j--) { | |
1952 | if (crc & (0x100 << j)) | |
1953 | crc ^= 0x107 << j; | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | return crc; | |
1958 | } | |
1959 | ||
1960 | /* This method controls the net device special MAC multicast support. | |
1961 | * The Special Multicast Table for MAC addresses supports MAC of the form | |
1962 | * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0xFF). | |
1963 | * The MAC DA[7:0] bits are used as a pointer to the Special Multicast | |
1964 | * Table entries in the DA-Filter table. This method set the Special | |
1965 | * Multicast Table appropriate entry. | |
1966 | */ | |
1967 | static void mvneta_set_special_mcast_addr(struct mvneta_port *pp, | |
1968 | unsigned char last_byte, | |
1969 | int queue) | |
1970 | { | |
1971 | unsigned int smc_table_reg; | |
1972 | unsigned int tbl_offset; | |
1973 | unsigned int reg_offset; | |
1974 | ||
1975 | /* Register offset from SMC table base */ | |
1976 | tbl_offset = (last_byte / 4); | |
1977 | /* Entry offset within the above reg */ | |
1978 | reg_offset = last_byte % 4; | |
1979 | ||
1980 | smc_table_reg = mvreg_read(pp, (MVNETA_DA_FILT_SPEC_MCAST | |
1981 | + tbl_offset * 4)); | |
1982 | ||
1983 | if (queue == -1) | |
1984 | smc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1985 | else { | |
1986 | smc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1987 | smc_table_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
1988 | } | |
1989 | ||
1990 | mvreg_write(pp, MVNETA_DA_FILT_SPEC_MCAST + tbl_offset * 4, | |
1991 | smc_table_reg); | |
1992 | } | |
1993 | ||
1994 | /* This method controls the network device Other MAC multicast support. | |
1995 | * The Other Multicast Table is used for multicast of another type. | |
1996 | * A CRC-8 is used as an index to the Other Multicast Table entries | |
1997 | * in the DA-Filter table. | |
1998 | * The method gets the CRC-8 value from the calling routine and | |
1999 | * sets the Other Multicast Table appropriate entry according to the | |
2000 | * specified CRC-8 . | |
2001 | */ | |
2002 | static void mvneta_set_other_mcast_addr(struct mvneta_port *pp, | |
2003 | unsigned char crc8, | |
2004 | int queue) | |
2005 | { | |
2006 | unsigned int omc_table_reg; | |
2007 | unsigned int tbl_offset; | |
2008 | unsigned int reg_offset; | |
2009 | ||
2010 | tbl_offset = (crc8 / 4) * 4; /* Register offset from OMC table base */ | |
2011 | reg_offset = crc8 % 4; /* Entry offset within the above reg */ | |
2012 | ||
2013 | omc_table_reg = mvreg_read(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset); | |
2014 | ||
2015 | if (queue == -1) { | |
2016 | /* Clear accepts frame bit at specified Other DA table entry */ | |
2017 | omc_table_reg &= ~(0xff << (8 * reg_offset)); | |
2018 | } else { | |
2019 | omc_table_reg &= ~(0xff << (8 * reg_offset)); | |
2020 | omc_table_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
2021 | } | |
2022 | ||
2023 | mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset, omc_table_reg); | |
2024 | } | |
2025 | ||
2026 | /* The network device supports multicast using two tables: | |
2027 | * 1) Special Multicast Table for MAC addresses of the form | |
2028 | * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0xFF). | |
2029 | * The MAC DA[7:0] bits are used as a pointer to the Special Multicast | |
2030 | * Table entries in the DA-Filter table. | |
2031 | * 2) Other Multicast Table for multicast of another type. A CRC-8 value | |
2032 | * is used as an index to the Other Multicast Table entries in the | |
2033 | * DA-Filter table. | |
2034 | */ | |
2035 | static int mvneta_mcast_addr_set(struct mvneta_port *pp, unsigned char *p_addr, | |
2036 | int queue) | |
2037 | { | |
2038 | unsigned char crc_result = 0; | |
2039 | ||
2040 | if (memcmp(p_addr, "\x01\x00\x5e\x00\x00", 5) == 0) { | |
2041 | mvneta_set_special_mcast_addr(pp, p_addr[5], queue); | |
2042 | return 0; | |
2043 | } | |
2044 | ||
2045 | crc_result = mvneta_addr_crc(p_addr); | |
2046 | if (queue == -1) { | |
2047 | if (pp->mcast_count[crc_result] == 0) { | |
2048 | netdev_info(pp->dev, "No valid Mcast for crc8=0x%02x\n", | |
2049 | crc_result); | |
2050 | return -EINVAL; | |
2051 | } | |
2052 | ||
2053 | pp->mcast_count[crc_result]--; | |
2054 | if (pp->mcast_count[crc_result] != 0) { | |
2055 | netdev_info(pp->dev, | |
2056 | "After delete there are %d valid Mcast for crc8=0x%02x\n", | |
2057 | pp->mcast_count[crc_result], crc_result); | |
2058 | return -EINVAL; | |
2059 | } | |
2060 | } else | |
2061 | pp->mcast_count[crc_result]++; | |
2062 | ||
2063 | mvneta_set_other_mcast_addr(pp, crc_result, queue); | |
2064 | ||
2065 | return 0; | |
2066 | } | |
2067 | ||
2068 | /* Configure Fitering mode of Ethernet port */ | |
2069 | static void mvneta_rx_unicast_promisc_set(struct mvneta_port *pp, | |
2070 | int is_promisc) | |
2071 | { | |
2072 | u32 port_cfg_reg, val; | |
2073 | ||
2074 | port_cfg_reg = mvreg_read(pp, MVNETA_PORT_CONFIG); | |
2075 | ||
2076 | val = mvreg_read(pp, MVNETA_TYPE_PRIO); | |
2077 | ||
2078 | /* Set / Clear UPM bit in port configuration register */ | |
2079 | if (is_promisc) { | |
2080 | /* Accept all Unicast addresses */ | |
2081 | port_cfg_reg |= MVNETA_UNI_PROMISC_MODE; | |
2082 | val |= MVNETA_FORCE_UNI; | |
2083 | mvreg_write(pp, MVNETA_MAC_ADDR_LOW, 0xffff); | |
2084 | mvreg_write(pp, MVNETA_MAC_ADDR_HIGH, 0xffffffff); | |
2085 | } else { | |
2086 | /* Reject all Unicast addresses */ | |
2087 | port_cfg_reg &= ~MVNETA_UNI_PROMISC_MODE; | |
2088 | val &= ~MVNETA_FORCE_UNI; | |
2089 | } | |
2090 | ||
2091 | mvreg_write(pp, MVNETA_PORT_CONFIG, port_cfg_reg); | |
2092 | mvreg_write(pp, MVNETA_TYPE_PRIO, val); | |
2093 | } | |
2094 | ||
2095 | /* register unicast and multicast addresses */ | |
2096 | static void mvneta_set_rx_mode(struct net_device *dev) | |
2097 | { | |
2098 | struct mvneta_port *pp = netdev_priv(dev); | |
2099 | struct netdev_hw_addr *ha; | |
2100 | ||
2101 | if (dev->flags & IFF_PROMISC) { | |
2102 | /* Accept all: Multicast + Unicast */ | |
2103 | mvneta_rx_unicast_promisc_set(pp, 1); | |
2104 | mvneta_set_ucast_table(pp, rxq_def); | |
2105 | mvneta_set_special_mcast_table(pp, rxq_def); | |
2106 | mvneta_set_other_mcast_table(pp, rxq_def); | |
2107 | } else { | |
2108 | /* Accept single Unicast */ | |
2109 | mvneta_rx_unicast_promisc_set(pp, 0); | |
2110 | mvneta_set_ucast_table(pp, -1); | |
2111 | mvneta_mac_addr_set(pp, dev->dev_addr, rxq_def); | |
2112 | ||
2113 | if (dev->flags & IFF_ALLMULTI) { | |
2114 | /* Accept all multicast */ | |
2115 | mvneta_set_special_mcast_table(pp, rxq_def); | |
2116 | mvneta_set_other_mcast_table(pp, rxq_def); | |
2117 | } else { | |
2118 | /* Accept only initialized multicast */ | |
2119 | mvneta_set_special_mcast_table(pp, -1); | |
2120 | mvneta_set_other_mcast_table(pp, -1); | |
2121 | ||
2122 | if (!netdev_mc_empty(dev)) { | |
2123 | netdev_for_each_mc_addr(ha, dev) { | |
2124 | mvneta_mcast_addr_set(pp, ha->addr, | |
2125 | rxq_def); | |
2126 | } | |
2127 | } | |
2128 | } | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | /* Interrupt handling - the callback for request_irq() */ | |
2133 | static irqreturn_t mvneta_isr(int irq, void *dev_id) | |
2134 | { | |
12bb03b4 | 2135 | struct mvneta_pcpu_port *port = (struct mvneta_pcpu_port *)dev_id; |
c5aff182 | 2136 | |
12bb03b4 | 2137 | disable_percpu_irq(port->pp->dev->irq); |
12bb03b4 | 2138 | napi_schedule(&port->napi); |
c5aff182 TP |
2139 | |
2140 | return IRQ_HANDLED; | |
2141 | } | |
2142 | ||
898b2970 SS |
2143 | static int mvneta_fixed_link_update(struct mvneta_port *pp, |
2144 | struct phy_device *phy) | |
2145 | { | |
2146 | struct fixed_phy_status status; | |
2147 | struct fixed_phy_status changed = {}; | |
2148 | u32 gmac_stat = mvreg_read(pp, MVNETA_GMAC_STATUS); | |
2149 | ||
2150 | status.link = !!(gmac_stat & MVNETA_GMAC_LINK_UP); | |
2151 | if (gmac_stat & MVNETA_GMAC_SPEED_1000) | |
2152 | status.speed = SPEED_1000; | |
2153 | else if (gmac_stat & MVNETA_GMAC_SPEED_100) | |
2154 | status.speed = SPEED_100; | |
2155 | else | |
2156 | status.speed = SPEED_10; | |
2157 | status.duplex = !!(gmac_stat & MVNETA_GMAC_FULL_DUPLEX); | |
2158 | changed.link = 1; | |
2159 | changed.speed = 1; | |
2160 | changed.duplex = 1; | |
2161 | fixed_phy_update_state(phy, &status, &changed); | |
2162 | return 0; | |
2163 | } | |
2164 | ||
c5aff182 TP |
2165 | /* NAPI handler |
2166 | * Bits 0 - 7 of the causeRxTx register indicate that are transmitted | |
2167 | * packets on the corresponding TXQ (Bit 0 is for TX queue 1). | |
2168 | * Bits 8 -15 of the cause Rx Tx register indicate that are received | |
2169 | * packets on the corresponding RXQ (Bit 8 is for RX queue 0). | |
2170 | * Each CPU has its own causeRxTx register | |
2171 | */ | |
2172 | static int mvneta_poll(struct napi_struct *napi, int budget) | |
2173 | { | |
2174 | int rx_done = 0; | |
2175 | u32 cause_rx_tx; | |
c5aff182 | 2176 | struct mvneta_port *pp = netdev_priv(napi->dev); |
12bb03b4 | 2177 | struct mvneta_pcpu_port *port = this_cpu_ptr(pp->ports); |
c5aff182 TP |
2178 | |
2179 | if (!netif_running(pp->dev)) { | |
12bb03b4 | 2180 | napi_complete(&port->napi); |
c5aff182 TP |
2181 | return rx_done; |
2182 | } | |
2183 | ||
2184 | /* Read cause register */ | |
898b2970 SS |
2185 | cause_rx_tx = mvreg_read(pp, MVNETA_INTR_NEW_CAUSE); |
2186 | if (cause_rx_tx & MVNETA_MISCINTR_INTR_MASK) { | |
2187 | u32 cause_misc = mvreg_read(pp, MVNETA_INTR_MISC_CAUSE); | |
2188 | ||
2189 | mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0); | |
2190 | if (pp->use_inband_status && (cause_misc & | |
2191 | (MVNETA_CAUSE_PHY_STATUS_CHANGE | | |
2192 | MVNETA_CAUSE_LINK_CHANGE | | |
2193 | MVNETA_CAUSE_PSC_SYNC_CHANGE))) { | |
2194 | mvneta_fixed_link_update(pp, pp->phy_dev); | |
2195 | } | |
2196 | } | |
71f6d1b3 | 2197 | |
2198 | /* Release Tx descriptors */ | |
2199 | if (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL) { | |
0713a86a | 2200 | mvneta_tx_done_gbe(pp, (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL)); |
71f6d1b3 | 2201 | cause_rx_tx &= ~MVNETA_TX_INTR_MASK_ALL; |
2202 | } | |
c5aff182 | 2203 | |
6a20c175 | 2204 | /* For the case where the last mvneta_poll did not process all |
c5aff182 TP |
2205 | * RX packets |
2206 | */ | |
12bb03b4 | 2207 | cause_rx_tx |= port->cause_rx_tx; |
d8936657 MR |
2208 | rx_done = mvneta_rx(pp, budget, &pp->rxqs[rxq_def]); |
2209 | budget -= rx_done; | |
c5aff182 TP |
2210 | |
2211 | if (budget > 0) { | |
2212 | cause_rx_tx = 0; | |
12bb03b4 MR |
2213 | napi_complete(&port->napi); |
2214 | enable_percpu_irq(pp->dev->irq, 0); | |
c5aff182 TP |
2215 | } |
2216 | ||
12bb03b4 | 2217 | port->cause_rx_tx = cause_rx_tx; |
c5aff182 TP |
2218 | return rx_done; |
2219 | } | |
2220 | ||
c5aff182 TP |
2221 | /* Handle rxq fill: allocates rxq skbs; called when initializing a port */ |
2222 | static int mvneta_rxq_fill(struct mvneta_port *pp, struct mvneta_rx_queue *rxq, | |
2223 | int num) | |
2224 | { | |
c5aff182 TP |
2225 | int i; |
2226 | ||
2227 | for (i = 0; i < num; i++) { | |
a1a65ab1 | 2228 | memset(rxq->descs + i, 0, sizeof(struct mvneta_rx_desc)); |
2229 | if (mvneta_rx_refill(pp, rxq->descs + i) != 0) { | |
2230 | netdev_err(pp->dev, "%s:rxq %d, %d of %d buffs filled\n", | |
c5aff182 TP |
2231 | __func__, rxq->id, i, num); |
2232 | break; | |
2233 | } | |
c5aff182 TP |
2234 | } |
2235 | ||
2236 | /* Add this number of RX descriptors as non occupied (ready to | |
6a20c175 TP |
2237 | * get packets) |
2238 | */ | |
c5aff182 TP |
2239 | mvneta_rxq_non_occup_desc_add(pp, rxq, i); |
2240 | ||
2241 | return i; | |
2242 | } | |
2243 | ||
2244 | /* Free all packets pending transmit from all TXQs and reset TX port */ | |
2245 | static void mvneta_tx_reset(struct mvneta_port *pp) | |
2246 | { | |
2247 | int queue; | |
2248 | ||
9672850b | 2249 | /* free the skb's in the tx ring */ |
c5aff182 TP |
2250 | for (queue = 0; queue < txq_number; queue++) |
2251 | mvneta_txq_done_force(pp, &pp->txqs[queue]); | |
2252 | ||
2253 | mvreg_write(pp, MVNETA_PORT_TX_RESET, MVNETA_PORT_TX_DMA_RESET); | |
2254 | mvreg_write(pp, MVNETA_PORT_TX_RESET, 0); | |
2255 | } | |
2256 | ||
2257 | static void mvneta_rx_reset(struct mvneta_port *pp) | |
2258 | { | |
2259 | mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET); | |
2260 | mvreg_write(pp, MVNETA_PORT_RX_RESET, 0); | |
2261 | } | |
2262 | ||
2263 | /* Rx/Tx queue initialization/cleanup methods */ | |
2264 | ||
2265 | /* Create a specified RX queue */ | |
2266 | static int mvneta_rxq_init(struct mvneta_port *pp, | |
2267 | struct mvneta_rx_queue *rxq) | |
2268 | ||
2269 | { | |
2270 | rxq->size = pp->rx_ring_size; | |
2271 | ||
2272 | /* Allocate memory for RX descriptors */ | |
2273 | rxq->descs = dma_alloc_coherent(pp->dev->dev.parent, | |
2274 | rxq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2275 | &rxq->descs_phys, GFP_KERNEL); | |
d0320f75 | 2276 | if (rxq->descs == NULL) |
c5aff182 | 2277 | return -ENOMEM; |
c5aff182 TP |
2278 | |
2279 | BUG_ON(rxq->descs != | |
2280 | PTR_ALIGN(rxq->descs, MVNETA_CPU_D_CACHE_LINE_SIZE)); | |
2281 | ||
2282 | rxq->last_desc = rxq->size - 1; | |
2283 | ||
2284 | /* Set Rx descriptors queue starting address */ | |
2285 | mvreg_write(pp, MVNETA_RXQ_BASE_ADDR_REG(rxq->id), rxq->descs_phys); | |
2286 | mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), rxq->size); | |
2287 | ||
2288 | /* Set Offset */ | |
2289 | mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD); | |
2290 | ||
2291 | /* Set coalescing pkts and time */ | |
2292 | mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal); | |
2293 | mvneta_rx_time_coal_set(pp, rxq, rxq->time_coal); | |
2294 | ||
2295 | /* Fill RXQ with buffers from RX pool */ | |
2296 | mvneta_rxq_buf_size_set(pp, rxq, MVNETA_RX_BUF_SIZE(pp->pkt_size)); | |
2297 | mvneta_rxq_bm_disable(pp, rxq); | |
2298 | mvneta_rxq_fill(pp, rxq, rxq->size); | |
2299 | ||
2300 | return 0; | |
2301 | } | |
2302 | ||
2303 | /* Cleanup Rx queue */ | |
2304 | static void mvneta_rxq_deinit(struct mvneta_port *pp, | |
2305 | struct mvneta_rx_queue *rxq) | |
2306 | { | |
2307 | mvneta_rxq_drop_pkts(pp, rxq); | |
2308 | ||
2309 | if (rxq->descs) | |
2310 | dma_free_coherent(pp->dev->dev.parent, | |
2311 | rxq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2312 | rxq->descs, | |
2313 | rxq->descs_phys); | |
2314 | ||
2315 | rxq->descs = NULL; | |
2316 | rxq->last_desc = 0; | |
2317 | rxq->next_desc_to_proc = 0; | |
2318 | rxq->descs_phys = 0; | |
2319 | } | |
2320 | ||
2321 | /* Create and initialize a tx queue */ | |
2322 | static int mvneta_txq_init(struct mvneta_port *pp, | |
2323 | struct mvneta_tx_queue *txq) | |
2324 | { | |
2325 | txq->size = pp->tx_ring_size; | |
2326 | ||
8eef5f97 EG |
2327 | /* A queue must always have room for at least one skb. |
2328 | * Therefore, stop the queue when the free entries reaches | |
2329 | * the maximum number of descriptors per skb. | |
2330 | */ | |
2331 | txq->tx_stop_threshold = txq->size - MVNETA_MAX_SKB_DESCS; | |
2332 | txq->tx_wake_threshold = txq->tx_stop_threshold / 2; | |
2333 | ||
2334 | ||
c5aff182 TP |
2335 | /* Allocate memory for TX descriptors */ |
2336 | txq->descs = dma_alloc_coherent(pp->dev->dev.parent, | |
2337 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2338 | &txq->descs_phys, GFP_KERNEL); | |
d0320f75 | 2339 | if (txq->descs == NULL) |
c5aff182 | 2340 | return -ENOMEM; |
c5aff182 TP |
2341 | |
2342 | /* Make sure descriptor address is cache line size aligned */ | |
2343 | BUG_ON(txq->descs != | |
2344 | PTR_ALIGN(txq->descs, MVNETA_CPU_D_CACHE_LINE_SIZE)); | |
2345 | ||
2346 | txq->last_desc = txq->size - 1; | |
2347 | ||
2348 | /* Set maximum bandwidth for enabled TXQs */ | |
2349 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(txq->id), 0x03ffffff); | |
2350 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(txq->id), 0x3fffffff); | |
2351 | ||
2352 | /* Set Tx descriptors queue starting address */ | |
2353 | mvreg_write(pp, MVNETA_TXQ_BASE_ADDR_REG(txq->id), txq->descs_phys); | |
2354 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), txq->size); | |
2355 | ||
2356 | txq->tx_skb = kmalloc(txq->size * sizeof(*txq->tx_skb), GFP_KERNEL); | |
2357 | if (txq->tx_skb == NULL) { | |
2358 | dma_free_coherent(pp->dev->dev.parent, | |
2359 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2360 | txq->descs, txq->descs_phys); | |
2361 | return -ENOMEM; | |
2362 | } | |
2adb719d EG |
2363 | |
2364 | /* Allocate DMA buffers for TSO MAC/IP/TCP headers */ | |
2365 | txq->tso_hdrs = dma_alloc_coherent(pp->dev->dev.parent, | |
2366 | txq->size * TSO_HEADER_SIZE, | |
2367 | &txq->tso_hdrs_phys, GFP_KERNEL); | |
2368 | if (txq->tso_hdrs == NULL) { | |
2369 | kfree(txq->tx_skb); | |
2370 | dma_free_coherent(pp->dev->dev.parent, | |
2371 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2372 | txq->descs, txq->descs_phys); | |
2373 | return -ENOMEM; | |
2374 | } | |
c5aff182 TP |
2375 | mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal); |
2376 | ||
2377 | return 0; | |
2378 | } | |
2379 | ||
2380 | /* Free allocated resources when mvneta_txq_init() fails to allocate memory*/ | |
2381 | static void mvneta_txq_deinit(struct mvneta_port *pp, | |
2382 | struct mvneta_tx_queue *txq) | |
2383 | { | |
2384 | kfree(txq->tx_skb); | |
2385 | ||
2adb719d EG |
2386 | if (txq->tso_hdrs) |
2387 | dma_free_coherent(pp->dev->dev.parent, | |
2388 | txq->size * TSO_HEADER_SIZE, | |
2389 | txq->tso_hdrs, txq->tso_hdrs_phys); | |
c5aff182 TP |
2390 | if (txq->descs) |
2391 | dma_free_coherent(pp->dev->dev.parent, | |
2392 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2393 | txq->descs, txq->descs_phys); | |
2394 | ||
2395 | txq->descs = NULL; | |
2396 | txq->last_desc = 0; | |
2397 | txq->next_desc_to_proc = 0; | |
2398 | txq->descs_phys = 0; | |
2399 | ||
2400 | /* Set minimum bandwidth for disabled TXQs */ | |
2401 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(txq->id), 0); | |
2402 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(txq->id), 0); | |
2403 | ||
2404 | /* Set Tx descriptors queue starting address and size */ | |
2405 | mvreg_write(pp, MVNETA_TXQ_BASE_ADDR_REG(txq->id), 0); | |
2406 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), 0); | |
2407 | } | |
2408 | ||
2409 | /* Cleanup all Tx queues */ | |
2410 | static void mvneta_cleanup_txqs(struct mvneta_port *pp) | |
2411 | { | |
2412 | int queue; | |
2413 | ||
2414 | for (queue = 0; queue < txq_number; queue++) | |
2415 | mvneta_txq_deinit(pp, &pp->txqs[queue]); | |
2416 | } | |
2417 | ||
2418 | /* Cleanup all Rx queues */ | |
2419 | static void mvneta_cleanup_rxqs(struct mvneta_port *pp) | |
2420 | { | |
d8936657 | 2421 | mvneta_rxq_deinit(pp, &pp->rxqs[rxq_def]); |
c5aff182 TP |
2422 | } |
2423 | ||
2424 | ||
2425 | /* Init all Rx queues */ | |
2426 | static int mvneta_setup_rxqs(struct mvneta_port *pp) | |
2427 | { | |
d8936657 MR |
2428 | int err = mvneta_rxq_init(pp, &pp->rxqs[rxq_def]); |
2429 | if (err) { | |
2430 | netdev_err(pp->dev, "%s: can't create rxq=%d\n", | |
2431 | __func__, rxq_def); | |
2432 | mvneta_cleanup_rxqs(pp); | |
2433 | return err; | |
c5aff182 TP |
2434 | } |
2435 | ||
2436 | return 0; | |
2437 | } | |
2438 | ||
2439 | /* Init all tx queues */ | |
2440 | static int mvneta_setup_txqs(struct mvneta_port *pp) | |
2441 | { | |
2442 | int queue; | |
2443 | ||
2444 | for (queue = 0; queue < txq_number; queue++) { | |
2445 | int err = mvneta_txq_init(pp, &pp->txqs[queue]); | |
2446 | if (err) { | |
2447 | netdev_err(pp->dev, "%s: can't create txq=%d\n", | |
2448 | __func__, queue); | |
2449 | mvneta_cleanup_txqs(pp); | |
2450 | return err; | |
2451 | } | |
2452 | } | |
2453 | ||
2454 | return 0; | |
2455 | } | |
2456 | ||
2457 | static void mvneta_start_dev(struct mvneta_port *pp) | |
2458 | { | |
12bb03b4 MR |
2459 | unsigned int cpu; |
2460 | ||
c5aff182 TP |
2461 | mvneta_max_rx_size_set(pp, pp->pkt_size); |
2462 | mvneta_txq_max_tx_size_set(pp, pp->pkt_size); | |
2463 | ||
2464 | /* start the Rx/Tx activity */ | |
2465 | mvneta_port_enable(pp); | |
2466 | ||
2467 | /* Enable polling on the port */ | |
12bb03b4 MR |
2468 | for_each_present_cpu(cpu) { |
2469 | struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu); | |
2470 | ||
2471 | napi_enable(&port->napi); | |
2472 | } | |
c5aff182 TP |
2473 | |
2474 | /* Unmask interrupts */ | |
2475 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, | |
898b2970 SS |
2476 | MVNETA_RX_INTR_MASK(rxq_number) | |
2477 | MVNETA_TX_INTR_MASK(txq_number) | | |
2478 | MVNETA_MISCINTR_INTR_MASK); | |
2479 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, | |
2480 | MVNETA_CAUSE_PHY_STATUS_CHANGE | | |
2481 | MVNETA_CAUSE_LINK_CHANGE | | |
2482 | MVNETA_CAUSE_PSC_SYNC_CHANGE); | |
c5aff182 TP |
2483 | |
2484 | phy_start(pp->phy_dev); | |
2485 | netif_tx_start_all_queues(pp->dev); | |
2486 | } | |
2487 | ||
2488 | static void mvneta_stop_dev(struct mvneta_port *pp) | |
2489 | { | |
12bb03b4 MR |
2490 | unsigned int cpu; |
2491 | ||
c5aff182 TP |
2492 | phy_stop(pp->phy_dev); |
2493 | ||
12bb03b4 MR |
2494 | for_each_present_cpu(cpu) { |
2495 | struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu); | |
2496 | ||
2497 | napi_disable(&port->napi); | |
2498 | } | |
c5aff182 TP |
2499 | |
2500 | netif_carrier_off(pp->dev); | |
2501 | ||
2502 | mvneta_port_down(pp); | |
2503 | netif_tx_stop_all_queues(pp->dev); | |
2504 | ||
2505 | /* Stop the port activity */ | |
2506 | mvneta_port_disable(pp); | |
2507 | ||
2508 | /* Clear all ethernet port interrupts */ | |
2509 | mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0); | |
2510 | mvreg_write(pp, MVNETA_INTR_OLD_CAUSE, 0); | |
2511 | ||
2512 | /* Mask all ethernet port interrupts */ | |
2513 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
2514 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
2515 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
2516 | ||
2517 | mvneta_tx_reset(pp); | |
2518 | mvneta_rx_reset(pp); | |
2519 | } | |
2520 | ||
c5aff182 TP |
2521 | /* Return positive if MTU is valid */ |
2522 | static int mvneta_check_mtu_valid(struct net_device *dev, int mtu) | |
2523 | { | |
2524 | if (mtu < 68) { | |
2525 | netdev_err(dev, "cannot change mtu to less than 68\n"); | |
2526 | return -EINVAL; | |
2527 | } | |
2528 | ||
6a20c175 | 2529 | /* 9676 == 9700 - 20 and rounding to 8 */ |
c5aff182 TP |
2530 | if (mtu > 9676) { |
2531 | netdev_info(dev, "Illegal MTU value %d, round to 9676\n", mtu); | |
2532 | mtu = 9676; | |
2533 | } | |
2534 | ||
2535 | if (!IS_ALIGNED(MVNETA_RX_PKT_SIZE(mtu), 8)) { | |
2536 | netdev_info(dev, "Illegal MTU value %d, rounding to %d\n", | |
2537 | mtu, ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8)); | |
2538 | mtu = ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8); | |
2539 | } | |
2540 | ||
2541 | return mtu; | |
2542 | } | |
2543 | ||
2544 | /* Change the device mtu */ | |
2545 | static int mvneta_change_mtu(struct net_device *dev, int mtu) | |
2546 | { | |
2547 | struct mvneta_port *pp = netdev_priv(dev); | |
2548 | int ret; | |
2549 | ||
2550 | mtu = mvneta_check_mtu_valid(dev, mtu); | |
2551 | if (mtu < 0) | |
2552 | return -EINVAL; | |
2553 | ||
2554 | dev->mtu = mtu; | |
2555 | ||
b65657fc SG |
2556 | if (!netif_running(dev)) { |
2557 | netdev_update_features(dev); | |
c5aff182 | 2558 | return 0; |
b65657fc | 2559 | } |
c5aff182 | 2560 | |
6a20c175 | 2561 | /* The interface is running, so we have to force a |
a92dbd96 | 2562 | * reallocation of the queues |
c5aff182 TP |
2563 | */ |
2564 | mvneta_stop_dev(pp); | |
2565 | ||
2566 | mvneta_cleanup_txqs(pp); | |
2567 | mvneta_cleanup_rxqs(pp); | |
2568 | ||
a92dbd96 | 2569 | pp->pkt_size = MVNETA_RX_PKT_SIZE(dev->mtu); |
8ec2cd48 | 2570 | pp->frag_size = SKB_DATA_ALIGN(MVNETA_RX_BUF_SIZE(pp->pkt_size)) + |
2571 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
c5aff182 TP |
2572 | |
2573 | ret = mvneta_setup_rxqs(pp); | |
2574 | if (ret) { | |
a92dbd96 | 2575 | netdev_err(dev, "unable to setup rxqs after MTU change\n"); |
c5aff182 TP |
2576 | return ret; |
2577 | } | |
2578 | ||
a92dbd96 EG |
2579 | ret = mvneta_setup_txqs(pp); |
2580 | if (ret) { | |
2581 | netdev_err(dev, "unable to setup txqs after MTU change\n"); | |
2582 | return ret; | |
2583 | } | |
c5aff182 TP |
2584 | |
2585 | mvneta_start_dev(pp); | |
2586 | mvneta_port_up(pp); | |
2587 | ||
b65657fc SG |
2588 | netdev_update_features(dev); |
2589 | ||
c5aff182 TP |
2590 | return 0; |
2591 | } | |
2592 | ||
b65657fc SG |
2593 | static netdev_features_t mvneta_fix_features(struct net_device *dev, |
2594 | netdev_features_t features) | |
2595 | { | |
2596 | struct mvneta_port *pp = netdev_priv(dev); | |
2597 | ||
2598 | if (pp->tx_csum_limit && dev->mtu > pp->tx_csum_limit) { | |
2599 | features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO); | |
2600 | netdev_info(dev, | |
2601 | "Disable IP checksum for MTU greater than %dB\n", | |
2602 | pp->tx_csum_limit); | |
2603 | } | |
2604 | ||
2605 | return features; | |
2606 | } | |
2607 | ||
8cc3e439 TP |
2608 | /* Get mac address */ |
2609 | static void mvneta_get_mac_addr(struct mvneta_port *pp, unsigned char *addr) | |
2610 | { | |
2611 | u32 mac_addr_l, mac_addr_h; | |
2612 | ||
2613 | mac_addr_l = mvreg_read(pp, MVNETA_MAC_ADDR_LOW); | |
2614 | mac_addr_h = mvreg_read(pp, MVNETA_MAC_ADDR_HIGH); | |
2615 | addr[0] = (mac_addr_h >> 24) & 0xFF; | |
2616 | addr[1] = (mac_addr_h >> 16) & 0xFF; | |
2617 | addr[2] = (mac_addr_h >> 8) & 0xFF; | |
2618 | addr[3] = mac_addr_h & 0xFF; | |
2619 | addr[4] = (mac_addr_l >> 8) & 0xFF; | |
2620 | addr[5] = mac_addr_l & 0xFF; | |
2621 | } | |
2622 | ||
c5aff182 TP |
2623 | /* Handle setting mac address */ |
2624 | static int mvneta_set_mac_addr(struct net_device *dev, void *addr) | |
2625 | { | |
2626 | struct mvneta_port *pp = netdev_priv(dev); | |
e68de360 EG |
2627 | struct sockaddr *sockaddr = addr; |
2628 | int ret; | |
c5aff182 | 2629 | |
e68de360 EG |
2630 | ret = eth_prepare_mac_addr_change(dev, addr); |
2631 | if (ret < 0) | |
2632 | return ret; | |
c5aff182 TP |
2633 | /* Remove previous address table entry */ |
2634 | mvneta_mac_addr_set(pp, dev->dev_addr, -1); | |
2635 | ||
2636 | /* Set new addr in hw */ | |
e68de360 | 2637 | mvneta_mac_addr_set(pp, sockaddr->sa_data, rxq_def); |
c5aff182 | 2638 | |
e68de360 | 2639 | eth_commit_mac_addr_change(dev, addr); |
c5aff182 TP |
2640 | return 0; |
2641 | } | |
2642 | ||
2643 | static void mvneta_adjust_link(struct net_device *ndev) | |
2644 | { | |
2645 | struct mvneta_port *pp = netdev_priv(ndev); | |
2646 | struct phy_device *phydev = pp->phy_dev; | |
2647 | int status_change = 0; | |
2648 | ||
2649 | if (phydev->link) { | |
2650 | if ((pp->speed != phydev->speed) || | |
2651 | (pp->duplex != phydev->duplex)) { | |
2652 | u32 val; | |
2653 | ||
2654 | val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
2655 | val &= ~(MVNETA_GMAC_CONFIG_MII_SPEED | | |
2656 | MVNETA_GMAC_CONFIG_GMII_SPEED | | |
898b2970 | 2657 | MVNETA_GMAC_CONFIG_FULL_DUPLEX); |
c5aff182 TP |
2658 | |
2659 | if (phydev->duplex) | |
2660 | val |= MVNETA_GMAC_CONFIG_FULL_DUPLEX; | |
2661 | ||
2662 | if (phydev->speed == SPEED_1000) | |
2663 | val |= MVNETA_GMAC_CONFIG_GMII_SPEED; | |
4d12bc63 | 2664 | else if (phydev->speed == SPEED_100) |
c5aff182 TP |
2665 | val |= MVNETA_GMAC_CONFIG_MII_SPEED; |
2666 | ||
2667 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
2668 | ||
2669 | pp->duplex = phydev->duplex; | |
2670 | pp->speed = phydev->speed; | |
2671 | } | |
2672 | } | |
2673 | ||
2674 | if (phydev->link != pp->link) { | |
2675 | if (!phydev->link) { | |
2676 | pp->duplex = -1; | |
2677 | pp->speed = 0; | |
2678 | } | |
2679 | ||
2680 | pp->link = phydev->link; | |
2681 | status_change = 1; | |
2682 | } | |
2683 | ||
2684 | if (status_change) { | |
2685 | if (phydev->link) { | |
898b2970 SS |
2686 | if (!pp->use_inband_status) { |
2687 | u32 val = mvreg_read(pp, | |
2688 | MVNETA_GMAC_AUTONEG_CONFIG); | |
2689 | val &= ~MVNETA_GMAC_FORCE_LINK_DOWN; | |
2690 | val |= MVNETA_GMAC_FORCE_LINK_PASS; | |
2691 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, | |
2692 | val); | |
2693 | } | |
c5aff182 | 2694 | mvneta_port_up(pp); |
c5aff182 | 2695 | } else { |
898b2970 SS |
2696 | if (!pp->use_inband_status) { |
2697 | u32 val = mvreg_read(pp, | |
2698 | MVNETA_GMAC_AUTONEG_CONFIG); | |
2699 | val &= ~MVNETA_GMAC_FORCE_LINK_PASS; | |
2700 | val |= MVNETA_GMAC_FORCE_LINK_DOWN; | |
2701 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, | |
2702 | val); | |
2703 | } | |
c5aff182 | 2704 | mvneta_port_down(pp); |
c5aff182 | 2705 | } |
0089b745 | 2706 | phy_print_status(phydev); |
c5aff182 TP |
2707 | } |
2708 | } | |
2709 | ||
2710 | static int mvneta_mdio_probe(struct mvneta_port *pp) | |
2711 | { | |
2712 | struct phy_device *phy_dev; | |
2713 | ||
2714 | phy_dev = of_phy_connect(pp->dev, pp->phy_node, mvneta_adjust_link, 0, | |
2715 | pp->phy_interface); | |
2716 | if (!phy_dev) { | |
2717 | netdev_err(pp->dev, "could not find the PHY\n"); | |
2718 | return -ENODEV; | |
2719 | } | |
2720 | ||
2721 | phy_dev->supported &= PHY_GBIT_FEATURES; | |
2722 | phy_dev->advertising = phy_dev->supported; | |
2723 | ||
2724 | pp->phy_dev = phy_dev; | |
2725 | pp->link = 0; | |
2726 | pp->duplex = 0; | |
2727 | pp->speed = 0; | |
2728 | ||
2729 | return 0; | |
2730 | } | |
2731 | ||
2732 | static void mvneta_mdio_remove(struct mvneta_port *pp) | |
2733 | { | |
2734 | phy_disconnect(pp->phy_dev); | |
2735 | pp->phy_dev = NULL; | |
2736 | } | |
2737 | ||
f8642885 MR |
2738 | static void mvneta_percpu_enable(void *arg) |
2739 | { | |
2740 | struct mvneta_port *pp = arg; | |
2741 | ||
2742 | enable_percpu_irq(pp->dev->irq, IRQ_TYPE_NONE); | |
2743 | } | |
2744 | ||
2745 | static void mvneta_percpu_disable(void *arg) | |
2746 | { | |
2747 | struct mvneta_port *pp = arg; | |
2748 | ||
2749 | disable_percpu_irq(pp->dev->irq); | |
2750 | } | |
2751 | ||
2752 | static void mvneta_percpu_elect(struct mvneta_port *pp) | |
2753 | { | |
2754 | int online_cpu_idx, cpu, i = 0; | |
2755 | ||
2756 | online_cpu_idx = rxq_def % num_online_cpus(); | |
2757 | ||
2758 | for_each_online_cpu(cpu) { | |
2759 | if (i == online_cpu_idx) | |
2760 | /* Enable per-CPU interrupt on the one CPU we | |
2761 | * just elected | |
2762 | */ | |
2763 | smp_call_function_single(cpu, mvneta_percpu_enable, | |
2764 | pp, true); | |
2765 | else | |
2766 | /* Disable per-CPU interrupt on all the other CPU */ | |
2767 | smp_call_function_single(cpu, mvneta_percpu_disable, | |
2768 | pp, true); | |
2769 | i++; | |
2770 | } | |
2771 | }; | |
2772 | ||
2773 | static int mvneta_percpu_notifier(struct notifier_block *nfb, | |
2774 | unsigned long action, void *hcpu) | |
2775 | { | |
2776 | struct mvneta_port *pp = container_of(nfb, struct mvneta_port, | |
2777 | cpu_notifier); | |
2778 | int cpu = (unsigned long)hcpu, other_cpu; | |
2779 | struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu); | |
2780 | ||
2781 | switch (action) { | |
2782 | case CPU_ONLINE: | |
2783 | case CPU_ONLINE_FROZEN: | |
2784 | netif_tx_stop_all_queues(pp->dev); | |
2785 | ||
2786 | /* We have to synchronise on tha napi of each CPU | |
2787 | * except the one just being waked up | |
2788 | */ | |
2789 | for_each_online_cpu(other_cpu) { | |
2790 | if (other_cpu != cpu) { | |
2791 | struct mvneta_pcpu_port *other_port = | |
2792 | per_cpu_ptr(pp->ports, other_cpu); | |
2793 | ||
2794 | napi_synchronize(&other_port->napi); | |
2795 | } | |
2796 | } | |
2797 | ||
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 | napi_enable(&port->napi); | |
2803 | ||
2804 | /* Enable per-CPU interrupt on the one CPU we care | |
2805 | * about. | |
2806 | */ | |
2807 | mvneta_percpu_elect(pp); | |
2808 | ||
2809 | /* Unmask all ethernet port interrupts */ | |
2810 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, | |
2811 | MVNETA_RX_INTR_MASK(rxq_number) | | |
2812 | MVNETA_TX_INTR_MASK(txq_number) | | |
2813 | MVNETA_MISCINTR_INTR_MASK); | |
2814 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, | |
2815 | MVNETA_CAUSE_PHY_STATUS_CHANGE | | |
2816 | MVNETA_CAUSE_LINK_CHANGE | | |
2817 | MVNETA_CAUSE_PSC_SYNC_CHANGE); | |
2818 | netif_tx_start_all_queues(pp->dev); | |
2819 | break; | |
2820 | case CPU_DOWN_PREPARE: | |
2821 | case CPU_DOWN_PREPARE_FROZEN: | |
2822 | netif_tx_stop_all_queues(pp->dev); | |
2823 | /* Mask all ethernet port interrupts */ | |
2824 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
2825 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
2826 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
2827 | ||
2828 | napi_synchronize(&port->napi); | |
2829 | napi_disable(&port->napi); | |
2830 | /* Disable per-CPU interrupts on the CPU that is | |
2831 | * brought down. | |
2832 | */ | |
2833 | smp_call_function_single(cpu, mvneta_percpu_disable, | |
2834 | pp, true); | |
2835 | ||
2836 | break; | |
2837 | case CPU_DEAD: | |
2838 | case CPU_DEAD_FROZEN: | |
2839 | /* Check if a new CPU must be elected now this on is down */ | |
2840 | mvneta_percpu_elect(pp); | |
2841 | /* Unmask all ethernet port interrupts */ | |
2842 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, | |
2843 | MVNETA_RX_INTR_MASK(rxq_number) | | |
2844 | MVNETA_TX_INTR_MASK(txq_number) | | |
2845 | MVNETA_MISCINTR_INTR_MASK); | |
2846 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, | |
2847 | MVNETA_CAUSE_PHY_STATUS_CHANGE | | |
2848 | MVNETA_CAUSE_LINK_CHANGE | | |
2849 | MVNETA_CAUSE_PSC_SYNC_CHANGE); | |
2850 | netif_tx_start_all_queues(pp->dev); | |
2851 | break; | |
2852 | } | |
2853 | ||
2854 | return NOTIFY_OK; | |
2855 | } | |
2856 | ||
c5aff182 TP |
2857 | static int mvneta_open(struct net_device *dev) |
2858 | { | |
2859 | struct mvneta_port *pp = netdev_priv(dev); | |
2860 | int ret; | |
2861 | ||
c5aff182 | 2862 | pp->pkt_size = MVNETA_RX_PKT_SIZE(pp->dev->mtu); |
8ec2cd48 | 2863 | pp->frag_size = SKB_DATA_ALIGN(MVNETA_RX_BUF_SIZE(pp->pkt_size)) + |
2864 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
c5aff182 TP |
2865 | |
2866 | ret = mvneta_setup_rxqs(pp); | |
2867 | if (ret) | |
2868 | return ret; | |
2869 | ||
2870 | ret = mvneta_setup_txqs(pp); | |
2871 | if (ret) | |
2872 | goto err_cleanup_rxqs; | |
2873 | ||
2874 | /* Connect to port interrupt line */ | |
12bb03b4 MR |
2875 | ret = request_percpu_irq(pp->dev->irq, mvneta_isr, |
2876 | MVNETA_DRIVER_NAME, pp->ports); | |
c5aff182 TP |
2877 | if (ret) { |
2878 | netdev_err(pp->dev, "cannot request irq %d\n", pp->dev->irq); | |
2879 | goto err_cleanup_txqs; | |
2880 | } | |
2881 | ||
f8642885 MR |
2882 | /* Even though the documentation says that request_percpu_irq |
2883 | * doesn't enable the interrupts automatically, it actually | |
2884 | * does so on the local CPU. | |
2885 | * | |
2886 | * Make sure it's disabled. | |
2887 | */ | |
2888 | mvneta_percpu_disable(pp); | |
2889 | ||
2890 | /* Elect a CPU to handle our RX queue interrupt */ | |
2891 | mvneta_percpu_elect(pp); | |
2892 | ||
2893 | /* Register a CPU notifier to handle the case where our CPU | |
2894 | * might be taken offline. | |
2895 | */ | |
2896 | register_cpu_notifier(&pp->cpu_notifier); | |
2897 | ||
c5aff182 TP |
2898 | /* In default link is down */ |
2899 | netif_carrier_off(pp->dev); | |
2900 | ||
2901 | ret = mvneta_mdio_probe(pp); | |
2902 | if (ret < 0) { | |
2903 | netdev_err(dev, "cannot probe MDIO bus\n"); | |
2904 | goto err_free_irq; | |
2905 | } | |
2906 | ||
2907 | mvneta_start_dev(pp); | |
2908 | ||
2909 | return 0; | |
2910 | ||
2911 | err_free_irq: | |
12bb03b4 | 2912 | free_percpu_irq(pp->dev->irq, pp->ports); |
c5aff182 TP |
2913 | err_cleanup_txqs: |
2914 | mvneta_cleanup_txqs(pp); | |
2915 | err_cleanup_rxqs: | |
2916 | mvneta_cleanup_rxqs(pp); | |
2917 | return ret; | |
2918 | } | |
2919 | ||
2920 | /* Stop the port, free port interrupt line */ | |
2921 | static int mvneta_stop(struct net_device *dev) | |
2922 | { | |
2923 | struct mvneta_port *pp = netdev_priv(dev); | |
f8642885 | 2924 | int cpu; |
c5aff182 TP |
2925 | |
2926 | mvneta_stop_dev(pp); | |
2927 | mvneta_mdio_remove(pp); | |
f8642885 MR |
2928 | unregister_cpu_notifier(&pp->cpu_notifier); |
2929 | for_each_present_cpu(cpu) | |
2930 | smp_call_function_single(cpu, mvneta_percpu_disable, pp, true); | |
12bb03b4 | 2931 | free_percpu_irq(dev->irq, pp->ports); |
c5aff182 TP |
2932 | mvneta_cleanup_rxqs(pp); |
2933 | mvneta_cleanup_txqs(pp); | |
c5aff182 TP |
2934 | |
2935 | return 0; | |
2936 | } | |
2937 | ||
15f59456 TP |
2938 | static int mvneta_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
2939 | { | |
2940 | struct mvneta_port *pp = netdev_priv(dev); | |
15f59456 TP |
2941 | |
2942 | if (!pp->phy_dev) | |
2943 | return -ENOTSUPP; | |
2944 | ||
ecf7b361 | 2945 | return phy_mii_ioctl(pp->phy_dev, ifr, cmd); |
15f59456 TP |
2946 | } |
2947 | ||
c5aff182 TP |
2948 | /* Ethtool methods */ |
2949 | ||
2950 | /* Get settings (phy address, speed) for ethtools */ | |
2951 | int mvneta_ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
2952 | { | |
2953 | struct mvneta_port *pp = netdev_priv(dev); | |
2954 | ||
2955 | if (!pp->phy_dev) | |
2956 | return -ENODEV; | |
2957 | ||
2958 | return phy_ethtool_gset(pp->phy_dev, cmd); | |
2959 | } | |
2960 | ||
2961 | /* Set settings (phy address, speed) for ethtools */ | |
2962 | int mvneta_ethtool_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
2963 | { | |
2964 | struct mvneta_port *pp = netdev_priv(dev); | |
0c0744fc | 2965 | struct phy_device *phydev = pp->phy_dev; |
c5aff182 | 2966 | |
0c0744fc | 2967 | if (!phydev) |
c5aff182 TP |
2968 | return -ENODEV; |
2969 | ||
0c0744fc SS |
2970 | if ((cmd->autoneg == AUTONEG_ENABLE) != pp->use_inband_status) { |
2971 | u32 val; | |
2972 | ||
2973 | mvneta_set_autoneg(pp, cmd->autoneg == AUTONEG_ENABLE); | |
2974 | ||
2975 | if (cmd->autoneg == AUTONEG_DISABLE) { | |
2976 | val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
2977 | val &= ~(MVNETA_GMAC_CONFIG_MII_SPEED | | |
2978 | MVNETA_GMAC_CONFIG_GMII_SPEED | | |
2979 | MVNETA_GMAC_CONFIG_FULL_DUPLEX); | |
2980 | ||
2981 | if (phydev->duplex) | |
2982 | val |= MVNETA_GMAC_CONFIG_FULL_DUPLEX; | |
2983 | ||
2984 | if (phydev->speed == SPEED_1000) | |
2985 | val |= MVNETA_GMAC_CONFIG_GMII_SPEED; | |
2986 | else if (phydev->speed == SPEED_100) | |
2987 | val |= MVNETA_GMAC_CONFIG_MII_SPEED; | |
2988 | ||
2989 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
2990 | } | |
2991 | ||
2992 | pp->use_inband_status = (cmd->autoneg == AUTONEG_ENABLE); | |
2993 | netdev_info(pp->dev, "autoneg status set to %i\n", | |
2994 | pp->use_inband_status); | |
2995 | ||
2996 | if (netif_running(dev)) { | |
2997 | mvneta_port_down(pp); | |
2998 | mvneta_port_up(pp); | |
2999 | } | |
3000 | } | |
3001 | ||
c5aff182 TP |
3002 | return phy_ethtool_sset(pp->phy_dev, cmd); |
3003 | } | |
3004 | ||
3005 | /* Set interrupt coalescing for ethtools */ | |
3006 | static int mvneta_ethtool_set_coalesce(struct net_device *dev, | |
3007 | struct ethtool_coalesce *c) | |
3008 | { | |
3009 | struct mvneta_port *pp = netdev_priv(dev); | |
3010 | int queue; | |
3011 | ||
3012 | for (queue = 0; queue < rxq_number; queue++) { | |
3013 | struct mvneta_rx_queue *rxq = &pp->rxqs[queue]; | |
3014 | rxq->time_coal = c->rx_coalesce_usecs; | |
3015 | rxq->pkts_coal = c->rx_max_coalesced_frames; | |
3016 | mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal); | |
3017 | mvneta_rx_time_coal_set(pp, rxq, rxq->time_coal); | |
3018 | } | |
3019 | ||
3020 | for (queue = 0; queue < txq_number; queue++) { | |
3021 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
3022 | txq->done_pkts_coal = c->tx_max_coalesced_frames; | |
3023 | mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal); | |
3024 | } | |
3025 | ||
3026 | return 0; | |
3027 | } | |
3028 | ||
3029 | /* get coalescing for ethtools */ | |
3030 | static int mvneta_ethtool_get_coalesce(struct net_device *dev, | |
3031 | struct ethtool_coalesce *c) | |
3032 | { | |
3033 | struct mvneta_port *pp = netdev_priv(dev); | |
3034 | ||
3035 | c->rx_coalesce_usecs = pp->rxqs[0].time_coal; | |
3036 | c->rx_max_coalesced_frames = pp->rxqs[0].pkts_coal; | |
3037 | ||
3038 | c->tx_max_coalesced_frames = pp->txqs[0].done_pkts_coal; | |
3039 | return 0; | |
3040 | } | |
3041 | ||
3042 | ||
3043 | static void mvneta_ethtool_get_drvinfo(struct net_device *dev, | |
3044 | struct ethtool_drvinfo *drvinfo) | |
3045 | { | |
3046 | strlcpy(drvinfo->driver, MVNETA_DRIVER_NAME, | |
3047 | sizeof(drvinfo->driver)); | |
3048 | strlcpy(drvinfo->version, MVNETA_DRIVER_VERSION, | |
3049 | sizeof(drvinfo->version)); | |
3050 | strlcpy(drvinfo->bus_info, dev_name(&dev->dev), | |
3051 | sizeof(drvinfo->bus_info)); | |
3052 | } | |
3053 | ||
3054 | ||
3055 | static void mvneta_ethtool_get_ringparam(struct net_device *netdev, | |
3056 | struct ethtool_ringparam *ring) | |
3057 | { | |
3058 | struct mvneta_port *pp = netdev_priv(netdev); | |
3059 | ||
3060 | ring->rx_max_pending = MVNETA_MAX_RXD; | |
3061 | ring->tx_max_pending = MVNETA_MAX_TXD; | |
3062 | ring->rx_pending = pp->rx_ring_size; | |
3063 | ring->tx_pending = pp->tx_ring_size; | |
3064 | } | |
3065 | ||
3066 | static int mvneta_ethtool_set_ringparam(struct net_device *dev, | |
3067 | struct ethtool_ringparam *ring) | |
3068 | { | |
3069 | struct mvneta_port *pp = netdev_priv(dev); | |
3070 | ||
3071 | if ((ring->rx_pending == 0) || (ring->tx_pending == 0)) | |
3072 | return -EINVAL; | |
3073 | pp->rx_ring_size = ring->rx_pending < MVNETA_MAX_RXD ? | |
3074 | ring->rx_pending : MVNETA_MAX_RXD; | |
8eef5f97 EG |
3075 | |
3076 | pp->tx_ring_size = clamp_t(u16, ring->tx_pending, | |
3077 | MVNETA_MAX_SKB_DESCS * 2, MVNETA_MAX_TXD); | |
3078 | if (pp->tx_ring_size != ring->tx_pending) | |
3079 | netdev_warn(dev, "TX queue size set to %u (requested %u)\n", | |
3080 | pp->tx_ring_size, ring->tx_pending); | |
c5aff182 TP |
3081 | |
3082 | if (netif_running(dev)) { | |
3083 | mvneta_stop(dev); | |
3084 | if (mvneta_open(dev)) { | |
3085 | netdev_err(dev, | |
3086 | "error on opening device after ring param change\n"); | |
3087 | return -ENOMEM; | |
3088 | } | |
3089 | } | |
3090 | ||
3091 | return 0; | |
3092 | } | |
3093 | ||
9b0cdefa RK |
3094 | static void mvneta_ethtool_get_strings(struct net_device *netdev, u32 sset, |
3095 | u8 *data) | |
3096 | { | |
3097 | if (sset == ETH_SS_STATS) { | |
3098 | int i; | |
3099 | ||
3100 | for (i = 0; i < ARRAY_SIZE(mvneta_statistics); i++) | |
3101 | memcpy(data + i * ETH_GSTRING_LEN, | |
3102 | mvneta_statistics[i].name, ETH_GSTRING_LEN); | |
3103 | } | |
3104 | } | |
3105 | ||
3106 | static void mvneta_ethtool_update_stats(struct mvneta_port *pp) | |
3107 | { | |
3108 | const struct mvneta_statistic *s; | |
3109 | void __iomem *base = pp->base; | |
3110 | u32 high, low, val; | |
3111 | int i; | |
3112 | ||
3113 | for (i = 0, s = mvneta_statistics; | |
3114 | s < mvneta_statistics + ARRAY_SIZE(mvneta_statistics); | |
3115 | s++, i++) { | |
3116 | val = 0; | |
3117 | ||
3118 | switch (s->type) { | |
3119 | case T_REG_32: | |
3120 | val = readl_relaxed(base + s->offset); | |
3121 | break; | |
3122 | case T_REG_64: | |
3123 | /* Docs say to read low 32-bit then high */ | |
3124 | low = readl_relaxed(base + s->offset); | |
3125 | high = readl_relaxed(base + s->offset + 4); | |
3126 | val = (u64)high << 32 | low; | |
3127 | break; | |
3128 | } | |
3129 | ||
3130 | pp->ethtool_stats[i] += val; | |
3131 | } | |
3132 | } | |
3133 | ||
3134 | static void mvneta_ethtool_get_stats(struct net_device *dev, | |
3135 | struct ethtool_stats *stats, u64 *data) | |
3136 | { | |
3137 | struct mvneta_port *pp = netdev_priv(dev); | |
3138 | int i; | |
3139 | ||
3140 | mvneta_ethtool_update_stats(pp); | |
3141 | ||
3142 | for (i = 0; i < ARRAY_SIZE(mvneta_statistics); i++) | |
3143 | *data++ = pp->ethtool_stats[i]; | |
3144 | } | |
3145 | ||
3146 | static int mvneta_ethtool_get_sset_count(struct net_device *dev, int sset) | |
3147 | { | |
3148 | if (sset == ETH_SS_STATS) | |
3149 | return ARRAY_SIZE(mvneta_statistics); | |
3150 | return -EOPNOTSUPP; | |
3151 | } | |
3152 | ||
c5aff182 TP |
3153 | static const struct net_device_ops mvneta_netdev_ops = { |
3154 | .ndo_open = mvneta_open, | |
3155 | .ndo_stop = mvneta_stop, | |
3156 | .ndo_start_xmit = mvneta_tx, | |
3157 | .ndo_set_rx_mode = mvneta_set_rx_mode, | |
3158 | .ndo_set_mac_address = mvneta_set_mac_addr, | |
3159 | .ndo_change_mtu = mvneta_change_mtu, | |
b65657fc | 3160 | .ndo_fix_features = mvneta_fix_features, |
c5aff182 | 3161 | .ndo_get_stats64 = mvneta_get_stats64, |
15f59456 | 3162 | .ndo_do_ioctl = mvneta_ioctl, |
c5aff182 TP |
3163 | }; |
3164 | ||
3165 | const struct ethtool_ops mvneta_eth_tool_ops = { | |
3166 | .get_link = ethtool_op_get_link, | |
3167 | .get_settings = mvneta_ethtool_get_settings, | |
3168 | .set_settings = mvneta_ethtool_set_settings, | |
3169 | .set_coalesce = mvneta_ethtool_set_coalesce, | |
3170 | .get_coalesce = mvneta_ethtool_get_coalesce, | |
3171 | .get_drvinfo = mvneta_ethtool_get_drvinfo, | |
3172 | .get_ringparam = mvneta_ethtool_get_ringparam, | |
3173 | .set_ringparam = mvneta_ethtool_set_ringparam, | |
9b0cdefa RK |
3174 | .get_strings = mvneta_ethtool_get_strings, |
3175 | .get_ethtool_stats = mvneta_ethtool_get_stats, | |
3176 | .get_sset_count = mvneta_ethtool_get_sset_count, | |
c5aff182 TP |
3177 | }; |
3178 | ||
3179 | /* Initialize hw */ | |
9672850b | 3180 | static int mvneta_init(struct device *dev, struct mvneta_port *pp) |
c5aff182 TP |
3181 | { |
3182 | int queue; | |
3183 | ||
3184 | /* Disable port */ | |
3185 | mvneta_port_disable(pp); | |
3186 | ||
3187 | /* Set port default values */ | |
3188 | mvneta_defaults_set(pp); | |
3189 | ||
9672850b EG |
3190 | pp->txqs = devm_kcalloc(dev, txq_number, sizeof(struct mvneta_tx_queue), |
3191 | GFP_KERNEL); | |
c5aff182 TP |
3192 | if (!pp->txqs) |
3193 | return -ENOMEM; | |
3194 | ||
3195 | /* Initialize TX descriptor rings */ | |
3196 | for (queue = 0; queue < txq_number; queue++) { | |
3197 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
3198 | txq->id = queue; | |
3199 | txq->size = pp->tx_ring_size; | |
3200 | txq->done_pkts_coal = MVNETA_TXDONE_COAL_PKTS; | |
3201 | } | |
3202 | ||
9672850b EG |
3203 | pp->rxqs = devm_kcalloc(dev, rxq_number, sizeof(struct mvneta_rx_queue), |
3204 | GFP_KERNEL); | |
3205 | if (!pp->rxqs) | |
c5aff182 | 3206 | return -ENOMEM; |
c5aff182 TP |
3207 | |
3208 | /* Create Rx descriptor rings */ | |
3209 | for (queue = 0; queue < rxq_number; queue++) { | |
3210 | struct mvneta_rx_queue *rxq = &pp->rxqs[queue]; | |
3211 | rxq->id = queue; | |
3212 | rxq->size = pp->rx_ring_size; | |
3213 | rxq->pkts_coal = MVNETA_RX_COAL_PKTS; | |
3214 | rxq->time_coal = MVNETA_RX_COAL_USEC; | |
3215 | } | |
3216 | ||
3217 | return 0; | |
3218 | } | |
3219 | ||
c5aff182 | 3220 | /* platform glue : initialize decoding windows */ |
03ce758e GK |
3221 | static void mvneta_conf_mbus_windows(struct mvneta_port *pp, |
3222 | const struct mbus_dram_target_info *dram) | |
c5aff182 TP |
3223 | { |
3224 | u32 win_enable; | |
3225 | u32 win_protect; | |
3226 | int i; | |
3227 | ||
3228 | for (i = 0; i < 6; i++) { | |
3229 | mvreg_write(pp, MVNETA_WIN_BASE(i), 0); | |
3230 | mvreg_write(pp, MVNETA_WIN_SIZE(i), 0); | |
3231 | ||
3232 | if (i < 4) | |
3233 | mvreg_write(pp, MVNETA_WIN_REMAP(i), 0); | |
3234 | } | |
3235 | ||
3236 | win_enable = 0x3f; | |
3237 | win_protect = 0; | |
3238 | ||
3239 | for (i = 0; i < dram->num_cs; i++) { | |
3240 | const struct mbus_dram_window *cs = dram->cs + i; | |
3241 | mvreg_write(pp, MVNETA_WIN_BASE(i), (cs->base & 0xffff0000) | | |
3242 | (cs->mbus_attr << 8) | dram->mbus_dram_target_id); | |
3243 | ||
3244 | mvreg_write(pp, MVNETA_WIN_SIZE(i), | |
3245 | (cs->size - 1) & 0xffff0000); | |
3246 | ||
3247 | win_enable &= ~(1 << i); | |
3248 | win_protect |= 3 << (2 * i); | |
3249 | } | |
3250 | ||
3251 | mvreg_write(pp, MVNETA_BASE_ADDR_ENABLE, win_enable); | |
db6ba9a5 | 3252 | mvreg_write(pp, MVNETA_ACCESS_PROTECT_ENABLE, win_protect); |
c5aff182 TP |
3253 | } |
3254 | ||
3255 | /* Power up the port */ | |
3f1dd4bc | 3256 | static int mvneta_port_power_up(struct mvneta_port *pp, int phy_mode) |
c5aff182 | 3257 | { |
3f1dd4bc | 3258 | u32 ctrl; |
c5aff182 TP |
3259 | |
3260 | /* MAC Cause register should be cleared */ | |
3261 | mvreg_write(pp, MVNETA_UNIT_INTR_CAUSE, 0); | |
3262 | ||
3f1dd4bc | 3263 | ctrl = mvreg_read(pp, MVNETA_GMAC_CTRL_2); |
c5aff182 | 3264 | |
3f1dd4bc TP |
3265 | /* Even though it might look weird, when we're configured in |
3266 | * SGMII or QSGMII mode, the RGMII bit needs to be set. | |
3267 | */ | |
3268 | switch(phy_mode) { | |
3269 | case PHY_INTERFACE_MODE_QSGMII: | |
3270 | mvreg_write(pp, MVNETA_SERDES_CFG, MVNETA_QSGMII_SERDES_PROTO); | |
3271 | ctrl |= MVNETA_GMAC2_PCS_ENABLE | MVNETA_GMAC2_PORT_RGMII; | |
3272 | break; | |
3273 | case PHY_INTERFACE_MODE_SGMII: | |
3274 | mvreg_write(pp, MVNETA_SERDES_CFG, MVNETA_SGMII_SERDES_PROTO); | |
3275 | ctrl |= MVNETA_GMAC2_PCS_ENABLE | MVNETA_GMAC2_PORT_RGMII; | |
3276 | break; | |
3277 | case PHY_INTERFACE_MODE_RGMII: | |
3278 | case PHY_INTERFACE_MODE_RGMII_ID: | |
3279 | ctrl |= MVNETA_GMAC2_PORT_RGMII; | |
3280 | break; | |
3281 | default: | |
3282 | return -EINVAL; | |
3283 | } | |
c5aff182 TP |
3284 | |
3285 | /* Cancel Port Reset */ | |
3f1dd4bc TP |
3286 | ctrl &= ~MVNETA_GMAC2_PORT_RESET; |
3287 | mvreg_write(pp, MVNETA_GMAC_CTRL_2, ctrl); | |
c5aff182 TP |
3288 | |
3289 | while ((mvreg_read(pp, MVNETA_GMAC_CTRL_2) & | |
3290 | MVNETA_GMAC2_PORT_RESET) != 0) | |
3291 | continue; | |
3f1dd4bc TP |
3292 | |
3293 | return 0; | |
c5aff182 TP |
3294 | } |
3295 | ||
3296 | /* Device initialization routine */ | |
03ce758e | 3297 | static int mvneta_probe(struct platform_device *pdev) |
c5aff182 TP |
3298 | { |
3299 | const struct mbus_dram_target_info *dram_target_info; | |
c3f0dd38 | 3300 | struct resource *res; |
c5aff182 TP |
3301 | struct device_node *dn = pdev->dev.of_node; |
3302 | struct device_node *phy_node; | |
c5aff182 TP |
3303 | struct mvneta_port *pp; |
3304 | struct net_device *dev; | |
8cc3e439 TP |
3305 | const char *dt_mac_addr; |
3306 | char hw_mac_addr[ETH_ALEN]; | |
3307 | const char *mac_from; | |
f8af8e6e | 3308 | const char *managed; |
9110ee07 | 3309 | int tx_csum_limit; |
c5aff182 TP |
3310 | int phy_mode; |
3311 | int err; | |
12bb03b4 | 3312 | int cpu; |
c5aff182 | 3313 | |
ee40a116 | 3314 | dev = alloc_etherdev_mqs(sizeof(struct mvneta_port), txq_number, rxq_number); |
c5aff182 TP |
3315 | if (!dev) |
3316 | return -ENOMEM; | |
3317 | ||
3318 | dev->irq = irq_of_parse_and_map(dn, 0); | |
3319 | if (dev->irq == 0) { | |
3320 | err = -EINVAL; | |
3321 | goto err_free_netdev; | |
3322 | } | |
3323 | ||
3324 | phy_node = of_parse_phandle(dn, "phy", 0); | |
3325 | if (!phy_node) { | |
83895bed TP |
3326 | if (!of_phy_is_fixed_link(dn)) { |
3327 | dev_err(&pdev->dev, "no PHY specified\n"); | |
3328 | err = -ENODEV; | |
3329 | goto err_free_irq; | |
3330 | } | |
3331 | ||
3332 | err = of_phy_register_fixed_link(dn); | |
3333 | if (err < 0) { | |
3334 | dev_err(&pdev->dev, "cannot register fixed PHY\n"); | |
3335 | goto err_free_irq; | |
3336 | } | |
3337 | ||
3338 | /* In the case of a fixed PHY, the DT node associated | |
3339 | * to the PHY is the Ethernet MAC DT node. | |
3340 | */ | |
c891c24c | 3341 | phy_node = of_node_get(dn); |
c5aff182 TP |
3342 | } |
3343 | ||
3344 | phy_mode = of_get_phy_mode(dn); | |
3345 | if (phy_mode < 0) { | |
3346 | dev_err(&pdev->dev, "incorrect phy-mode\n"); | |
3347 | err = -EINVAL; | |
c891c24c | 3348 | goto err_put_phy_node; |
c5aff182 TP |
3349 | } |
3350 | ||
c5aff182 TP |
3351 | dev->tx_queue_len = MVNETA_MAX_TXD; |
3352 | dev->watchdog_timeo = 5 * HZ; | |
3353 | dev->netdev_ops = &mvneta_netdev_ops; | |
3354 | ||
7ad24ea4 | 3355 | dev->ethtool_ops = &mvneta_eth_tool_ops; |
c5aff182 TP |
3356 | |
3357 | pp = netdev_priv(dev); | |
c5aff182 TP |
3358 | pp->phy_node = phy_node; |
3359 | pp->phy_interface = phy_mode; | |
f8af8e6e SS |
3360 | |
3361 | err = of_property_read_string(dn, "managed", &managed); | |
3362 | pp->use_inband_status = (err == 0 && | |
3363 | strcmp(managed, "in-band-status") == 0); | |
f8642885 | 3364 | pp->cpu_notifier.notifier_call = mvneta_percpu_notifier; |
c5aff182 | 3365 | |
189dd626 TP |
3366 | pp->clk = devm_clk_get(&pdev->dev, NULL); |
3367 | if (IS_ERR(pp->clk)) { | |
3368 | err = PTR_ERR(pp->clk); | |
c891c24c | 3369 | goto err_put_phy_node; |
189dd626 TP |
3370 | } |
3371 | ||
3372 | clk_prepare_enable(pp->clk); | |
3373 | ||
c3f0dd38 TP |
3374 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
3375 | pp->base = devm_ioremap_resource(&pdev->dev, res); | |
3376 | if (IS_ERR(pp->base)) { | |
3377 | err = PTR_ERR(pp->base); | |
5445eaf3 APR |
3378 | goto err_clk; |
3379 | } | |
3380 | ||
12bb03b4 MR |
3381 | /* Alloc per-cpu port structure */ |
3382 | pp->ports = alloc_percpu(struct mvneta_pcpu_port); | |
3383 | if (!pp->ports) { | |
3384 | err = -ENOMEM; | |
3385 | goto err_clk; | |
3386 | } | |
3387 | ||
74c41b04 | 3388 | /* Alloc per-cpu stats */ |
1c213bd2 | 3389 | pp->stats = netdev_alloc_pcpu_stats(struct mvneta_pcpu_stats); |
74c41b04 | 3390 | if (!pp->stats) { |
3391 | err = -ENOMEM; | |
12bb03b4 | 3392 | goto err_free_ports; |
74c41b04 | 3393 | } |
3394 | ||
8cc3e439 | 3395 | dt_mac_addr = of_get_mac_address(dn); |
6c7a9a3c | 3396 | if (dt_mac_addr) { |
8cc3e439 TP |
3397 | mac_from = "device tree"; |
3398 | memcpy(dev->dev_addr, dt_mac_addr, ETH_ALEN); | |
3399 | } else { | |
3400 | mvneta_get_mac_addr(pp, hw_mac_addr); | |
3401 | if (is_valid_ether_addr(hw_mac_addr)) { | |
3402 | mac_from = "hardware"; | |
3403 | memcpy(dev->dev_addr, hw_mac_addr, ETH_ALEN); | |
3404 | } else { | |
3405 | mac_from = "random"; | |
3406 | eth_hw_addr_random(dev); | |
3407 | } | |
3408 | } | |
3409 | ||
9110ee07 MW |
3410 | if (!of_property_read_u32(dn, "tx-csum-limit", &tx_csum_limit)) { |
3411 | if (tx_csum_limit < 0 || | |
3412 | tx_csum_limit > MVNETA_TX_CSUM_MAX_SIZE) { | |
3413 | tx_csum_limit = MVNETA_TX_CSUM_DEF_SIZE; | |
3414 | dev_info(&pdev->dev, | |
3415 | "Wrong TX csum limit in DT, set to %dB\n", | |
3416 | MVNETA_TX_CSUM_DEF_SIZE); | |
3417 | } | |
3418 | } else if (of_device_is_compatible(dn, "marvell,armada-370-neta")) { | |
3419 | tx_csum_limit = MVNETA_TX_CSUM_DEF_SIZE; | |
3420 | } else { | |
3421 | tx_csum_limit = MVNETA_TX_CSUM_MAX_SIZE; | |
3422 | } | |
3423 | ||
3424 | pp->tx_csum_limit = tx_csum_limit; | |
b65657fc | 3425 | |
c5aff182 TP |
3426 | pp->tx_ring_size = MVNETA_MAX_TXD; |
3427 | pp->rx_ring_size = MVNETA_MAX_RXD; | |
3428 | ||
3429 | pp->dev = dev; | |
3430 | SET_NETDEV_DEV(dev, &pdev->dev); | |
3431 | ||
9672850b EG |
3432 | err = mvneta_init(&pdev->dev, pp); |
3433 | if (err < 0) | |
74c41b04 | 3434 | goto err_free_stats; |
3f1dd4bc TP |
3435 | |
3436 | err = mvneta_port_power_up(pp, phy_mode); | |
3437 | if (err < 0) { | |
3438 | dev_err(&pdev->dev, "can't power up port\n"); | |
9672850b | 3439 | goto err_free_stats; |
3f1dd4bc | 3440 | } |
c5aff182 TP |
3441 | |
3442 | dram_target_info = mv_mbus_dram_info(); | |
3443 | if (dram_target_info) | |
3444 | mvneta_conf_mbus_windows(pp, dram_target_info); | |
3445 | ||
12bb03b4 MR |
3446 | for_each_present_cpu(cpu) { |
3447 | struct mvneta_pcpu_port *port = per_cpu_ptr(pp->ports, cpu); | |
3448 | ||
3449 | netif_napi_add(dev, &port->napi, mvneta_poll, NAPI_POLL_WEIGHT); | |
3450 | port->pp = pp; | |
3451 | } | |
c5aff182 | 3452 | |
2adb719d | 3453 | dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; |
01ef26ca EG |
3454 | dev->hw_features |= dev->features; |
3455 | dev->vlan_features |= dev->features; | |
b50b72de | 3456 | dev->priv_flags |= IFF_UNICAST_FLT; |
8eef5f97 | 3457 | dev->gso_max_segs = MVNETA_MAX_TSO_SEGS; |
b50b72de | 3458 | |
c5aff182 TP |
3459 | err = register_netdev(dev); |
3460 | if (err < 0) { | |
3461 | dev_err(&pdev->dev, "failed to register\n"); | |
9672850b | 3462 | goto err_free_stats; |
c5aff182 TP |
3463 | } |
3464 | ||
8cc3e439 TP |
3465 | netdev_info(dev, "Using %s mac address %pM\n", mac_from, |
3466 | dev->dev_addr); | |
c5aff182 TP |
3467 | |
3468 | platform_set_drvdata(pdev, pp->dev); | |
3469 | ||
898b2970 SS |
3470 | if (pp->use_inband_status) { |
3471 | struct phy_device *phy = of_phy_find_device(dn); | |
3472 | ||
3473 | mvneta_fixed_link_update(pp, phy); | |
04d53b20 RK |
3474 | |
3475 | put_device(&phy->dev); | |
898b2970 SS |
3476 | } |
3477 | ||
c5aff182 TP |
3478 | return 0; |
3479 | ||
74c41b04 | 3480 | err_free_stats: |
3481 | free_percpu(pp->stats); | |
12bb03b4 MR |
3482 | err_free_ports: |
3483 | free_percpu(pp->ports); | |
5445eaf3 APR |
3484 | err_clk: |
3485 | clk_disable_unprepare(pp->clk); | |
c891c24c UKK |
3486 | err_put_phy_node: |
3487 | of_node_put(phy_node); | |
c5aff182 TP |
3488 | err_free_irq: |
3489 | irq_dispose_mapping(dev->irq); | |
3490 | err_free_netdev: | |
3491 | free_netdev(dev); | |
3492 | return err; | |
3493 | } | |
3494 | ||
3495 | /* Device removal routine */ | |
03ce758e | 3496 | static int mvneta_remove(struct platform_device *pdev) |
c5aff182 TP |
3497 | { |
3498 | struct net_device *dev = platform_get_drvdata(pdev); | |
3499 | struct mvneta_port *pp = netdev_priv(dev); | |
3500 | ||
3501 | unregister_netdev(dev); | |
189dd626 | 3502 | clk_disable_unprepare(pp->clk); |
12bb03b4 | 3503 | free_percpu(pp->ports); |
74c41b04 | 3504 | free_percpu(pp->stats); |
c5aff182 | 3505 | irq_dispose_mapping(dev->irq); |
c891c24c | 3506 | of_node_put(pp->phy_node); |
c5aff182 TP |
3507 | free_netdev(dev); |
3508 | ||
c5aff182 TP |
3509 | return 0; |
3510 | } | |
3511 | ||
3512 | static const struct of_device_id mvneta_match[] = { | |
3513 | { .compatible = "marvell,armada-370-neta" }, | |
f522a975 | 3514 | { .compatible = "marvell,armada-xp-neta" }, |
c5aff182 TP |
3515 | { } |
3516 | }; | |
3517 | MODULE_DEVICE_TABLE(of, mvneta_match); | |
3518 | ||
3519 | static struct platform_driver mvneta_driver = { | |
3520 | .probe = mvneta_probe, | |
03ce758e | 3521 | .remove = mvneta_remove, |
c5aff182 TP |
3522 | .driver = { |
3523 | .name = MVNETA_DRIVER_NAME, | |
3524 | .of_match_table = mvneta_match, | |
3525 | }, | |
3526 | }; | |
3527 | ||
3528 | module_platform_driver(mvneta_driver); | |
3529 | ||
3530 | MODULE_DESCRIPTION("Marvell NETA Ethernet Driver - www.marvell.com"); | |
3531 | MODULE_AUTHOR("Rami Rosen <rosenr@marvell.com>, Thomas Petazzoni <thomas.petazzoni@free-electrons.com>"); | |
3532 | MODULE_LICENSE("GPL"); | |
3533 | ||
3534 | module_param(rxq_number, int, S_IRUGO); | |
3535 | module_param(txq_number, int, S_IRUGO); | |
3536 | ||
3537 | module_param(rxq_def, int, S_IRUGO); | |
f19fadfc | 3538 | module_param(rx_copybreak, int, S_IRUGO | S_IWUSR); |