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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> | |
23 | #include <net/ip.h> | |
24 | #include <net/ipv6.h> | |
25 | #include <linux/of.h> | |
26 | #include <linux/of_irq.h> | |
27 | #include <linux/of_mdio.h> | |
28 | #include <linux/of_net.h> | |
29 | #include <linux/of_address.h> | |
30 | #include <linux/phy.h> | |
189dd626 | 31 | #include <linux/clk.h> |
c5aff182 TP |
32 | |
33 | /* Registers */ | |
34 | #define MVNETA_RXQ_CONFIG_REG(q) (0x1400 + ((q) << 2)) | |
35 | #define MVNETA_RXQ_HW_BUF_ALLOC BIT(1) | |
36 | #define MVNETA_RXQ_PKT_OFFSET_ALL_MASK (0xf << 8) | |
37 | #define MVNETA_RXQ_PKT_OFFSET_MASK(offs) ((offs) << 8) | |
38 | #define MVNETA_RXQ_THRESHOLD_REG(q) (0x14c0 + ((q) << 2)) | |
39 | #define MVNETA_RXQ_NON_OCCUPIED(v) ((v) << 16) | |
40 | #define MVNETA_RXQ_BASE_ADDR_REG(q) (0x1480 + ((q) << 2)) | |
41 | #define MVNETA_RXQ_SIZE_REG(q) (0x14a0 + ((q) << 2)) | |
42 | #define MVNETA_RXQ_BUF_SIZE_SHIFT 19 | |
43 | #define MVNETA_RXQ_BUF_SIZE_MASK (0x1fff << 19) | |
44 | #define MVNETA_RXQ_STATUS_REG(q) (0x14e0 + ((q) << 2)) | |
45 | #define MVNETA_RXQ_OCCUPIED_ALL_MASK 0x3fff | |
46 | #define MVNETA_RXQ_STATUS_UPDATE_REG(q) (0x1500 + ((q) << 2)) | |
47 | #define MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT 16 | |
48 | #define MVNETA_RXQ_ADD_NON_OCCUPIED_MAX 255 | |
49 | #define MVNETA_PORT_RX_RESET 0x1cc0 | |
50 | #define MVNETA_PORT_RX_DMA_RESET BIT(0) | |
51 | #define MVNETA_PHY_ADDR 0x2000 | |
52 | #define MVNETA_PHY_ADDR_MASK 0x1f | |
53 | #define MVNETA_MBUS_RETRY 0x2010 | |
54 | #define MVNETA_UNIT_INTR_CAUSE 0x2080 | |
55 | #define MVNETA_UNIT_CONTROL 0x20B0 | |
56 | #define MVNETA_PHY_POLLING_ENABLE BIT(1) | |
57 | #define MVNETA_WIN_BASE(w) (0x2200 + ((w) << 3)) | |
58 | #define MVNETA_WIN_SIZE(w) (0x2204 + ((w) << 3)) | |
59 | #define MVNETA_WIN_REMAP(w) (0x2280 + ((w) << 2)) | |
60 | #define MVNETA_BASE_ADDR_ENABLE 0x2290 | |
61 | #define MVNETA_PORT_CONFIG 0x2400 | |
62 | #define MVNETA_UNI_PROMISC_MODE BIT(0) | |
63 | #define MVNETA_DEF_RXQ(q) ((q) << 1) | |
64 | #define MVNETA_DEF_RXQ_ARP(q) ((q) << 4) | |
65 | #define MVNETA_TX_UNSET_ERR_SUM BIT(12) | |
66 | #define MVNETA_DEF_RXQ_TCP(q) ((q) << 16) | |
67 | #define MVNETA_DEF_RXQ_UDP(q) ((q) << 19) | |
68 | #define MVNETA_DEF_RXQ_BPDU(q) ((q) << 22) | |
69 | #define MVNETA_RX_CSUM_WITH_PSEUDO_HDR BIT(25) | |
70 | #define MVNETA_PORT_CONFIG_DEFL_VALUE(q) (MVNETA_DEF_RXQ(q) | \ | |
71 | MVNETA_DEF_RXQ_ARP(q) | \ | |
72 | MVNETA_DEF_RXQ_TCP(q) | \ | |
73 | MVNETA_DEF_RXQ_UDP(q) | \ | |
74 | MVNETA_DEF_RXQ_BPDU(q) | \ | |
75 | MVNETA_TX_UNSET_ERR_SUM | \ | |
76 | MVNETA_RX_CSUM_WITH_PSEUDO_HDR) | |
77 | #define MVNETA_PORT_CONFIG_EXTEND 0x2404 | |
78 | #define MVNETA_MAC_ADDR_LOW 0x2414 | |
79 | #define MVNETA_MAC_ADDR_HIGH 0x2418 | |
80 | #define MVNETA_SDMA_CONFIG 0x241c | |
81 | #define MVNETA_SDMA_BRST_SIZE_16 4 | |
82 | #define MVNETA_NO_DESC_SWAP 0x0 | |
83 | #define MVNETA_RX_BRST_SZ_MASK(burst) ((burst) << 1) | |
84 | #define MVNETA_RX_NO_DATA_SWAP BIT(4) | |
85 | #define MVNETA_TX_NO_DATA_SWAP BIT(5) | |
86 | #define MVNETA_TX_BRST_SZ_MASK(burst) ((burst) << 22) | |
87 | #define MVNETA_PORT_STATUS 0x2444 | |
88 | #define MVNETA_TX_IN_PRGRS BIT(1) | |
89 | #define MVNETA_TX_FIFO_EMPTY BIT(8) | |
90 | #define MVNETA_RX_MIN_FRAME_SIZE 0x247c | |
5445eaf3 APR |
91 | #define MVNETA_SGMII_SERDES_CFG 0x24A0 |
92 | #define MVNETA_SGMII_SERDES_PROTO 0x0cc7 | |
c5aff182 TP |
93 | #define MVNETA_TYPE_PRIO 0x24bc |
94 | #define MVNETA_FORCE_UNI BIT(21) | |
95 | #define MVNETA_TXQ_CMD_1 0x24e4 | |
96 | #define MVNETA_TXQ_CMD 0x2448 | |
97 | #define MVNETA_TXQ_DISABLE_SHIFT 8 | |
98 | #define MVNETA_TXQ_ENABLE_MASK 0x000000ff | |
99 | #define MVNETA_ACC_MODE 0x2500 | |
100 | #define MVNETA_CPU_MAP(cpu) (0x2540 + ((cpu) << 2)) | |
101 | #define MVNETA_CPU_RXQ_ACCESS_ALL_MASK 0x000000ff | |
102 | #define MVNETA_CPU_TXQ_ACCESS_ALL_MASK 0x0000ff00 | |
103 | #define MVNETA_RXQ_TIME_COAL_REG(q) (0x2580 + ((q) << 2)) | |
104 | #define MVNETA_INTR_NEW_CAUSE 0x25a0 | |
105 | #define MVNETA_RX_INTR_MASK(nr_rxqs) (((1 << nr_rxqs) - 1) << 8) | |
106 | #define MVNETA_INTR_NEW_MASK 0x25a4 | |
107 | #define MVNETA_INTR_OLD_CAUSE 0x25a8 | |
108 | #define MVNETA_INTR_OLD_MASK 0x25ac | |
109 | #define MVNETA_INTR_MISC_CAUSE 0x25b0 | |
110 | #define MVNETA_INTR_MISC_MASK 0x25b4 | |
111 | #define MVNETA_INTR_ENABLE 0x25b8 | |
112 | #define MVNETA_TXQ_INTR_ENABLE_ALL_MASK 0x0000ff00 | |
113 | #define MVNETA_RXQ_INTR_ENABLE_ALL_MASK 0xff000000 | |
114 | #define MVNETA_RXQ_CMD 0x2680 | |
115 | #define MVNETA_RXQ_DISABLE_SHIFT 8 | |
116 | #define MVNETA_RXQ_ENABLE_MASK 0x000000ff | |
117 | #define MVETH_TXQ_TOKEN_COUNT_REG(q) (0x2700 + ((q) << 4)) | |
118 | #define MVETH_TXQ_TOKEN_CFG_REG(q) (0x2704 + ((q) << 4)) | |
119 | #define MVNETA_GMAC_CTRL_0 0x2c00 | |
120 | #define MVNETA_GMAC_MAX_RX_SIZE_SHIFT 2 | |
121 | #define MVNETA_GMAC_MAX_RX_SIZE_MASK 0x7ffc | |
122 | #define MVNETA_GMAC0_PORT_ENABLE BIT(0) | |
123 | #define MVNETA_GMAC_CTRL_2 0x2c08 | |
124 | #define MVNETA_GMAC2_PSC_ENABLE BIT(3) | |
125 | #define MVNETA_GMAC2_PORT_RGMII BIT(4) | |
126 | #define MVNETA_GMAC2_PORT_RESET BIT(6) | |
127 | #define MVNETA_GMAC_STATUS 0x2c10 | |
128 | #define MVNETA_GMAC_LINK_UP BIT(0) | |
129 | #define MVNETA_GMAC_SPEED_1000 BIT(1) | |
130 | #define MVNETA_GMAC_SPEED_100 BIT(2) | |
131 | #define MVNETA_GMAC_FULL_DUPLEX BIT(3) | |
132 | #define MVNETA_GMAC_RX_FLOW_CTRL_ENABLE BIT(4) | |
133 | #define MVNETA_GMAC_TX_FLOW_CTRL_ENABLE BIT(5) | |
134 | #define MVNETA_GMAC_RX_FLOW_CTRL_ACTIVE BIT(6) | |
135 | #define MVNETA_GMAC_TX_FLOW_CTRL_ACTIVE BIT(7) | |
136 | #define MVNETA_GMAC_AUTONEG_CONFIG 0x2c0c | |
137 | #define MVNETA_GMAC_FORCE_LINK_DOWN BIT(0) | |
138 | #define MVNETA_GMAC_FORCE_LINK_PASS BIT(1) | |
139 | #define MVNETA_GMAC_CONFIG_MII_SPEED BIT(5) | |
140 | #define MVNETA_GMAC_CONFIG_GMII_SPEED BIT(6) | |
141 | #define MVNETA_GMAC_CONFIG_FULL_DUPLEX BIT(12) | |
142 | #define MVNETA_MIB_COUNTERS_BASE 0x3080 | |
143 | #define MVNETA_MIB_LATE_COLLISION 0x7c | |
144 | #define MVNETA_DA_FILT_SPEC_MCAST 0x3400 | |
145 | #define MVNETA_DA_FILT_OTH_MCAST 0x3500 | |
146 | #define MVNETA_DA_FILT_UCAST_BASE 0x3600 | |
147 | #define MVNETA_TXQ_BASE_ADDR_REG(q) (0x3c00 + ((q) << 2)) | |
148 | #define MVNETA_TXQ_SIZE_REG(q) (0x3c20 + ((q) << 2)) | |
149 | #define MVNETA_TXQ_SENT_THRESH_ALL_MASK 0x3fff0000 | |
150 | #define MVNETA_TXQ_SENT_THRESH_MASK(coal) ((coal) << 16) | |
151 | #define MVNETA_TXQ_UPDATE_REG(q) (0x3c60 + ((q) << 2)) | |
152 | #define MVNETA_TXQ_DEC_SENT_SHIFT 16 | |
153 | #define MVNETA_TXQ_STATUS_REG(q) (0x3c40 + ((q) << 2)) | |
154 | #define MVNETA_TXQ_SENT_DESC_SHIFT 16 | |
155 | #define MVNETA_TXQ_SENT_DESC_MASK 0x3fff0000 | |
156 | #define MVNETA_PORT_TX_RESET 0x3cf0 | |
157 | #define MVNETA_PORT_TX_DMA_RESET BIT(0) | |
158 | #define MVNETA_TX_MTU 0x3e0c | |
159 | #define MVNETA_TX_TOKEN_SIZE 0x3e14 | |
160 | #define MVNETA_TX_TOKEN_SIZE_MAX 0xffffffff | |
161 | #define MVNETA_TXQ_TOKEN_SIZE_REG(q) (0x3e40 + ((q) << 2)) | |
162 | #define MVNETA_TXQ_TOKEN_SIZE_MAX 0x7fffffff | |
163 | ||
164 | #define MVNETA_CAUSE_TXQ_SENT_DESC_ALL_MASK 0xff | |
165 | ||
166 | /* Descriptor ring Macros */ | |
167 | #define MVNETA_QUEUE_NEXT_DESC(q, index) \ | |
168 | (((index) < (q)->last_desc) ? ((index) + 1) : 0) | |
169 | ||
170 | /* Various constants */ | |
171 | ||
172 | /* Coalescing */ | |
173 | #define MVNETA_TXDONE_COAL_PKTS 16 | |
174 | #define MVNETA_RX_COAL_PKTS 32 | |
175 | #define MVNETA_RX_COAL_USEC 100 | |
176 | ||
177 | /* Timer */ | |
178 | #define MVNETA_TX_DONE_TIMER_PERIOD 10 | |
179 | ||
180 | /* Napi polling weight */ | |
181 | #define MVNETA_RX_POLL_WEIGHT 64 | |
182 | ||
6a20c175 | 183 | /* The two bytes Marvell header. Either contains a special value used |
c5aff182 TP |
184 | * by Marvell switches when a specific hardware mode is enabled (not |
185 | * supported by this driver) or is filled automatically by zeroes on | |
186 | * the RX side. Those two bytes being at the front of the Ethernet | |
187 | * header, they allow to have the IP header aligned on a 4 bytes | |
188 | * boundary automatically: the hardware skips those two bytes on its | |
189 | * own. | |
190 | */ | |
191 | #define MVNETA_MH_SIZE 2 | |
192 | ||
193 | #define MVNETA_VLAN_TAG_LEN 4 | |
194 | ||
195 | #define MVNETA_CPU_D_CACHE_LINE_SIZE 32 | |
196 | #define MVNETA_TX_CSUM_MAX_SIZE 9800 | |
197 | #define MVNETA_ACC_MODE_EXT 1 | |
198 | ||
199 | /* Timeout constants */ | |
200 | #define MVNETA_TX_DISABLE_TIMEOUT_MSEC 1000 | |
201 | #define MVNETA_RX_DISABLE_TIMEOUT_MSEC 1000 | |
202 | #define MVNETA_TX_FIFO_EMPTY_TIMEOUT 10000 | |
203 | ||
204 | #define MVNETA_TX_MTU_MAX 0x3ffff | |
205 | ||
206 | /* Max number of Rx descriptors */ | |
207 | #define MVNETA_MAX_RXD 128 | |
208 | ||
209 | /* Max number of Tx descriptors */ | |
210 | #define MVNETA_MAX_TXD 532 | |
211 | ||
212 | /* descriptor aligned size */ | |
213 | #define MVNETA_DESC_ALIGNED_SIZE 32 | |
214 | ||
215 | #define MVNETA_RX_PKT_SIZE(mtu) \ | |
216 | ALIGN((mtu) + MVNETA_MH_SIZE + MVNETA_VLAN_TAG_LEN + \ | |
217 | ETH_HLEN + ETH_FCS_LEN, \ | |
218 | MVNETA_CPU_D_CACHE_LINE_SIZE) | |
219 | ||
220 | #define MVNETA_RX_BUF_SIZE(pkt_size) ((pkt_size) + NET_SKB_PAD) | |
221 | ||
222 | struct mvneta_stats { | |
223 | struct u64_stats_sync syncp; | |
224 | u64 packets; | |
225 | u64 bytes; | |
226 | }; | |
227 | ||
228 | struct mvneta_port { | |
229 | int pkt_size; | |
230 | void __iomem *base; | |
231 | struct mvneta_rx_queue *rxqs; | |
232 | struct mvneta_tx_queue *txqs; | |
233 | struct timer_list tx_done_timer; | |
234 | struct net_device *dev; | |
235 | ||
236 | u32 cause_rx_tx; | |
237 | struct napi_struct napi; | |
238 | ||
239 | /* Flags */ | |
240 | unsigned long flags; | |
241 | #define MVNETA_F_TX_DONE_TIMER_BIT 0 | |
242 | ||
243 | /* Napi weight */ | |
244 | int weight; | |
245 | ||
246 | /* Core clock */ | |
189dd626 | 247 | struct clk *clk; |
c5aff182 TP |
248 | u8 mcast_count[256]; |
249 | u16 tx_ring_size; | |
250 | u16 rx_ring_size; | |
251 | struct mvneta_stats tx_stats; | |
252 | struct mvneta_stats rx_stats; | |
253 | ||
254 | struct mii_bus *mii_bus; | |
255 | struct phy_device *phy_dev; | |
256 | phy_interface_t phy_interface; | |
257 | struct device_node *phy_node; | |
258 | unsigned int link; | |
259 | unsigned int duplex; | |
260 | unsigned int speed; | |
261 | }; | |
262 | ||
6a20c175 | 263 | /* The mvneta_tx_desc and mvneta_rx_desc structures describe the |
c5aff182 TP |
264 | * layout of the transmit and reception DMA descriptors, and their |
265 | * layout is therefore defined by the hardware design | |
266 | */ | |
267 | struct mvneta_tx_desc { | |
268 | u32 command; /* Options used by HW for packet transmitting.*/ | |
269 | #define MVNETA_TX_L3_OFF_SHIFT 0 | |
270 | #define MVNETA_TX_IP_HLEN_SHIFT 8 | |
271 | #define MVNETA_TX_L4_UDP BIT(16) | |
272 | #define MVNETA_TX_L3_IP6 BIT(17) | |
273 | #define MVNETA_TXD_IP_CSUM BIT(18) | |
274 | #define MVNETA_TXD_Z_PAD BIT(19) | |
275 | #define MVNETA_TXD_L_DESC BIT(20) | |
276 | #define MVNETA_TXD_F_DESC BIT(21) | |
277 | #define MVNETA_TXD_FLZ_DESC (MVNETA_TXD_Z_PAD | \ | |
278 | MVNETA_TXD_L_DESC | \ | |
279 | MVNETA_TXD_F_DESC) | |
280 | #define MVNETA_TX_L4_CSUM_FULL BIT(30) | |
281 | #define MVNETA_TX_L4_CSUM_NOT BIT(31) | |
282 | ||
283 | u16 reserverd1; /* csum_l4 (for future use) */ | |
284 | u16 data_size; /* Data size of transmitted packet in bytes */ | |
285 | u32 buf_phys_addr; /* Physical addr of transmitted buffer */ | |
286 | u32 reserved2; /* hw_cmd - (for future use, PMT) */ | |
287 | u32 reserved3[4]; /* Reserved - (for future use) */ | |
288 | }; | |
289 | ||
290 | struct mvneta_rx_desc { | |
291 | u32 status; /* Info about received packet */ | |
292 | #define MVNETA_RXD_ERR_CRC 0x0 | |
293 | #define MVNETA_RXD_ERR_SUMMARY BIT(16) | |
294 | #define MVNETA_RXD_ERR_OVERRUN BIT(17) | |
295 | #define MVNETA_RXD_ERR_LEN BIT(18) | |
296 | #define MVNETA_RXD_ERR_RESOURCE (BIT(17) | BIT(18)) | |
297 | #define MVNETA_RXD_ERR_CODE_MASK (BIT(17) | BIT(18)) | |
298 | #define MVNETA_RXD_L3_IP4 BIT(25) | |
299 | #define MVNETA_RXD_FIRST_LAST_DESC (BIT(26) | BIT(27)) | |
300 | #define MVNETA_RXD_L4_CSUM_OK BIT(30) | |
301 | ||
302 | u16 reserved1; /* pnc_info - (for future use, PnC) */ | |
303 | u16 data_size; /* Size of received packet in bytes */ | |
304 | u32 buf_phys_addr; /* Physical address of the buffer */ | |
305 | u32 reserved2; /* pnc_flow_id (for future use, PnC) */ | |
306 | u32 buf_cookie; /* cookie for access to RX buffer in rx path */ | |
307 | u16 reserved3; /* prefetch_cmd, for future use */ | |
308 | u16 reserved4; /* csum_l4 - (for future use, PnC) */ | |
309 | u32 reserved5; /* pnc_extra PnC (for future use, PnC) */ | |
310 | u32 reserved6; /* hw_cmd (for future use, PnC and HWF) */ | |
311 | }; | |
312 | ||
313 | struct mvneta_tx_queue { | |
314 | /* Number of this TX queue, in the range 0-7 */ | |
315 | u8 id; | |
316 | ||
317 | /* Number of TX DMA descriptors in the descriptor ring */ | |
318 | int size; | |
319 | ||
320 | /* Number of currently used TX DMA descriptor in the | |
6a20c175 TP |
321 | * descriptor ring |
322 | */ | |
c5aff182 TP |
323 | int count; |
324 | ||
325 | /* Array of transmitted skb */ | |
326 | struct sk_buff **tx_skb; | |
327 | ||
328 | /* Index of last TX DMA descriptor that was inserted */ | |
329 | int txq_put_index; | |
330 | ||
331 | /* Index of the TX DMA descriptor to be cleaned up */ | |
332 | int txq_get_index; | |
333 | ||
334 | u32 done_pkts_coal; | |
335 | ||
336 | /* Virtual address of the TX DMA descriptors array */ | |
337 | struct mvneta_tx_desc *descs; | |
338 | ||
339 | /* DMA address of the TX DMA descriptors array */ | |
340 | dma_addr_t descs_phys; | |
341 | ||
342 | /* Index of the last TX DMA descriptor */ | |
343 | int last_desc; | |
344 | ||
345 | /* Index of the next TX DMA descriptor to process */ | |
346 | int next_desc_to_proc; | |
347 | }; | |
348 | ||
349 | struct mvneta_rx_queue { | |
350 | /* rx queue number, in the range 0-7 */ | |
351 | u8 id; | |
352 | ||
353 | /* num of rx descriptors in the rx descriptor ring */ | |
354 | int size; | |
355 | ||
356 | /* counter of times when mvneta_refill() failed */ | |
357 | int missed; | |
358 | ||
359 | u32 pkts_coal; | |
360 | u32 time_coal; | |
361 | ||
362 | /* Virtual address of the RX DMA descriptors array */ | |
363 | struct mvneta_rx_desc *descs; | |
364 | ||
365 | /* DMA address of the RX DMA descriptors array */ | |
366 | dma_addr_t descs_phys; | |
367 | ||
368 | /* Index of the last RX DMA descriptor */ | |
369 | int last_desc; | |
370 | ||
371 | /* Index of the next RX DMA descriptor to process */ | |
372 | int next_desc_to_proc; | |
373 | }; | |
374 | ||
375 | static int rxq_number = 8; | |
376 | static int txq_number = 8; | |
377 | ||
378 | static int rxq_def; | |
c5aff182 TP |
379 | |
380 | #define MVNETA_DRIVER_NAME "mvneta" | |
381 | #define MVNETA_DRIVER_VERSION "1.0" | |
382 | ||
383 | /* Utility/helper methods */ | |
384 | ||
385 | /* Write helper method */ | |
386 | static void mvreg_write(struct mvneta_port *pp, u32 offset, u32 data) | |
387 | { | |
388 | writel(data, pp->base + offset); | |
389 | } | |
390 | ||
391 | /* Read helper method */ | |
392 | static u32 mvreg_read(struct mvneta_port *pp, u32 offset) | |
393 | { | |
394 | return readl(pp->base + offset); | |
395 | } | |
396 | ||
397 | /* Increment txq get counter */ | |
398 | static void mvneta_txq_inc_get(struct mvneta_tx_queue *txq) | |
399 | { | |
400 | txq->txq_get_index++; | |
401 | if (txq->txq_get_index == txq->size) | |
402 | txq->txq_get_index = 0; | |
403 | } | |
404 | ||
405 | /* Increment txq put counter */ | |
406 | static void mvneta_txq_inc_put(struct mvneta_tx_queue *txq) | |
407 | { | |
408 | txq->txq_put_index++; | |
409 | if (txq->txq_put_index == txq->size) | |
410 | txq->txq_put_index = 0; | |
411 | } | |
412 | ||
413 | ||
414 | /* Clear all MIB counters */ | |
415 | static void mvneta_mib_counters_clear(struct mvneta_port *pp) | |
416 | { | |
417 | int i; | |
418 | u32 dummy; | |
419 | ||
420 | /* Perform dummy reads from MIB counters */ | |
421 | for (i = 0; i < MVNETA_MIB_LATE_COLLISION; i += 4) | |
422 | dummy = mvreg_read(pp, (MVNETA_MIB_COUNTERS_BASE + i)); | |
423 | } | |
424 | ||
425 | /* Get System Network Statistics */ | |
426 | struct rtnl_link_stats64 *mvneta_get_stats64(struct net_device *dev, | |
427 | struct rtnl_link_stats64 *stats) | |
428 | { | |
429 | struct mvneta_port *pp = netdev_priv(dev); | |
430 | unsigned int start; | |
431 | ||
432 | memset(stats, 0, sizeof(struct rtnl_link_stats64)); | |
433 | ||
434 | do { | |
435 | start = u64_stats_fetch_begin_bh(&pp->rx_stats.syncp); | |
436 | stats->rx_packets = pp->rx_stats.packets; | |
437 | stats->rx_bytes = pp->rx_stats.bytes; | |
438 | } while (u64_stats_fetch_retry_bh(&pp->rx_stats.syncp, start)); | |
439 | ||
440 | ||
441 | do { | |
442 | start = u64_stats_fetch_begin_bh(&pp->tx_stats.syncp); | |
443 | stats->tx_packets = pp->tx_stats.packets; | |
444 | stats->tx_bytes = pp->tx_stats.bytes; | |
445 | } while (u64_stats_fetch_retry_bh(&pp->tx_stats.syncp, start)); | |
446 | ||
447 | stats->rx_errors = dev->stats.rx_errors; | |
448 | stats->rx_dropped = dev->stats.rx_dropped; | |
449 | ||
450 | stats->tx_dropped = dev->stats.tx_dropped; | |
451 | ||
452 | return stats; | |
453 | } | |
454 | ||
455 | /* Rx descriptors helper methods */ | |
456 | ||
6a20c175 | 457 | /* Checks whether the given RX descriptor is both the first and the |
c5aff182 TP |
458 | * last descriptor for the RX packet. Each RX packet is currently |
459 | * received through a single RX descriptor, so not having each RX | |
460 | * descriptor with its first and last bits set is an error | |
461 | */ | |
462 | static int mvneta_rxq_desc_is_first_last(struct mvneta_rx_desc *desc) | |
463 | { | |
464 | return (desc->status & MVNETA_RXD_FIRST_LAST_DESC) == | |
465 | MVNETA_RXD_FIRST_LAST_DESC; | |
466 | } | |
467 | ||
468 | /* Add number of descriptors ready to receive new packets */ | |
469 | static void mvneta_rxq_non_occup_desc_add(struct mvneta_port *pp, | |
470 | struct mvneta_rx_queue *rxq, | |
471 | int ndescs) | |
472 | { | |
473 | /* Only MVNETA_RXQ_ADD_NON_OCCUPIED_MAX (255) descriptors can | |
6a20c175 TP |
474 | * be added at once |
475 | */ | |
c5aff182 TP |
476 | while (ndescs > MVNETA_RXQ_ADD_NON_OCCUPIED_MAX) { |
477 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), | |
478 | (MVNETA_RXQ_ADD_NON_OCCUPIED_MAX << | |
479 | MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT)); | |
480 | ndescs -= MVNETA_RXQ_ADD_NON_OCCUPIED_MAX; | |
481 | } | |
482 | ||
483 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), | |
484 | (ndescs << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT)); | |
485 | } | |
486 | ||
487 | /* Get number of RX descriptors occupied by received packets */ | |
488 | static int mvneta_rxq_busy_desc_num_get(struct mvneta_port *pp, | |
489 | struct mvneta_rx_queue *rxq) | |
490 | { | |
491 | u32 val; | |
492 | ||
493 | val = mvreg_read(pp, MVNETA_RXQ_STATUS_REG(rxq->id)); | |
494 | return val & MVNETA_RXQ_OCCUPIED_ALL_MASK; | |
495 | } | |
496 | ||
6a20c175 | 497 | /* Update num of rx desc called upon return from rx path or |
c5aff182 TP |
498 | * from mvneta_rxq_drop_pkts(). |
499 | */ | |
500 | static void mvneta_rxq_desc_num_update(struct mvneta_port *pp, | |
501 | struct mvneta_rx_queue *rxq, | |
502 | int rx_done, int rx_filled) | |
503 | { | |
504 | u32 val; | |
505 | ||
506 | if ((rx_done <= 0xff) && (rx_filled <= 0xff)) { | |
507 | val = rx_done | | |
508 | (rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT); | |
509 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val); | |
510 | return; | |
511 | } | |
512 | ||
513 | /* Only 255 descriptors can be added at once */ | |
514 | while ((rx_done > 0) || (rx_filled > 0)) { | |
515 | if (rx_done <= 0xff) { | |
516 | val = rx_done; | |
517 | rx_done = 0; | |
518 | } else { | |
519 | val = 0xff; | |
520 | rx_done -= 0xff; | |
521 | } | |
522 | if (rx_filled <= 0xff) { | |
523 | val |= rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT; | |
524 | rx_filled = 0; | |
525 | } else { | |
526 | val |= 0xff << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT; | |
527 | rx_filled -= 0xff; | |
528 | } | |
529 | mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val); | |
530 | } | |
531 | } | |
532 | ||
533 | /* Get pointer to next RX descriptor to be processed by SW */ | |
534 | static struct mvneta_rx_desc * | |
535 | mvneta_rxq_next_desc_get(struct mvneta_rx_queue *rxq) | |
536 | { | |
537 | int rx_desc = rxq->next_desc_to_proc; | |
538 | ||
539 | rxq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(rxq, rx_desc); | |
540 | return rxq->descs + rx_desc; | |
541 | } | |
542 | ||
543 | /* Change maximum receive size of the port. */ | |
544 | static void mvneta_max_rx_size_set(struct mvneta_port *pp, int max_rx_size) | |
545 | { | |
546 | u32 val; | |
547 | ||
548 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
549 | val &= ~MVNETA_GMAC_MAX_RX_SIZE_MASK; | |
550 | val |= ((max_rx_size - MVNETA_MH_SIZE) / 2) << | |
551 | MVNETA_GMAC_MAX_RX_SIZE_SHIFT; | |
552 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
553 | } | |
554 | ||
555 | ||
556 | /* Set rx queue offset */ | |
557 | static void mvneta_rxq_offset_set(struct mvneta_port *pp, | |
558 | struct mvneta_rx_queue *rxq, | |
559 | int offset) | |
560 | { | |
561 | u32 val; | |
562 | ||
563 | val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id)); | |
564 | val &= ~MVNETA_RXQ_PKT_OFFSET_ALL_MASK; | |
565 | ||
566 | /* Offset is in */ | |
567 | val |= MVNETA_RXQ_PKT_OFFSET_MASK(offset >> 3); | |
568 | mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val); | |
569 | } | |
570 | ||
571 | ||
572 | /* Tx descriptors helper methods */ | |
573 | ||
574 | /* Update HW with number of TX descriptors to be sent */ | |
575 | static void mvneta_txq_pend_desc_add(struct mvneta_port *pp, | |
576 | struct mvneta_tx_queue *txq, | |
577 | int pend_desc) | |
578 | { | |
579 | u32 val; | |
580 | ||
581 | /* Only 255 descriptors can be added at once ; Assume caller | |
6a20c175 TP |
582 | * process TX desriptors in quanta less than 256 |
583 | */ | |
c5aff182 TP |
584 | val = pend_desc; |
585 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
586 | } | |
587 | ||
588 | /* Get pointer to next TX descriptor to be processed (send) by HW */ | |
589 | static struct mvneta_tx_desc * | |
590 | mvneta_txq_next_desc_get(struct mvneta_tx_queue *txq) | |
591 | { | |
592 | int tx_desc = txq->next_desc_to_proc; | |
593 | ||
594 | txq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(txq, tx_desc); | |
595 | return txq->descs + tx_desc; | |
596 | } | |
597 | ||
598 | /* Release the last allocated TX descriptor. Useful to handle DMA | |
6a20c175 TP |
599 | * mapping failures in the TX path. |
600 | */ | |
c5aff182 TP |
601 | static void mvneta_txq_desc_put(struct mvneta_tx_queue *txq) |
602 | { | |
603 | if (txq->next_desc_to_proc == 0) | |
604 | txq->next_desc_to_proc = txq->last_desc - 1; | |
605 | else | |
606 | txq->next_desc_to_proc--; | |
607 | } | |
608 | ||
609 | /* Set rxq buf size */ | |
610 | static void mvneta_rxq_buf_size_set(struct mvneta_port *pp, | |
611 | struct mvneta_rx_queue *rxq, | |
612 | int buf_size) | |
613 | { | |
614 | u32 val; | |
615 | ||
616 | val = mvreg_read(pp, MVNETA_RXQ_SIZE_REG(rxq->id)); | |
617 | ||
618 | val &= ~MVNETA_RXQ_BUF_SIZE_MASK; | |
619 | val |= ((buf_size >> 3) << MVNETA_RXQ_BUF_SIZE_SHIFT); | |
620 | ||
621 | mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), val); | |
622 | } | |
623 | ||
624 | /* Disable buffer management (BM) */ | |
625 | static void mvneta_rxq_bm_disable(struct mvneta_port *pp, | |
626 | struct mvneta_rx_queue *rxq) | |
627 | { | |
628 | u32 val; | |
629 | ||
630 | val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id)); | |
631 | val &= ~MVNETA_RXQ_HW_BUF_ALLOC; | |
632 | mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val); | |
633 | } | |
634 | ||
635 | ||
636 | ||
637 | /* Sets the RGMII Enable bit (RGMIIEn) in port MAC control register */ | |
03ce758e | 638 | static void mvneta_gmac_rgmii_set(struct mvneta_port *pp, int enable) |
c5aff182 TP |
639 | { |
640 | u32 val; | |
641 | ||
642 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_2); | |
643 | ||
644 | if (enable) | |
645 | val |= MVNETA_GMAC2_PORT_RGMII; | |
646 | else | |
647 | val &= ~MVNETA_GMAC2_PORT_RGMII; | |
648 | ||
649 | mvreg_write(pp, MVNETA_GMAC_CTRL_2, val); | |
650 | } | |
651 | ||
652 | /* Config SGMII port */ | |
03ce758e | 653 | static void mvneta_port_sgmii_config(struct mvneta_port *pp) |
c5aff182 TP |
654 | { |
655 | u32 val; | |
656 | ||
657 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_2); | |
658 | val |= MVNETA_GMAC2_PSC_ENABLE; | |
659 | mvreg_write(pp, MVNETA_GMAC_CTRL_2, val); | |
5445eaf3 APR |
660 | |
661 | mvreg_write(pp, MVNETA_SGMII_SERDES_CFG, MVNETA_SGMII_SERDES_PROTO); | |
c5aff182 TP |
662 | } |
663 | ||
664 | /* Start the Ethernet port RX and TX activity */ | |
665 | static void mvneta_port_up(struct mvneta_port *pp) | |
666 | { | |
667 | int queue; | |
668 | u32 q_map; | |
669 | ||
670 | /* Enable all initialized TXs. */ | |
671 | mvneta_mib_counters_clear(pp); | |
672 | q_map = 0; | |
673 | for (queue = 0; queue < txq_number; queue++) { | |
674 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
675 | if (txq->descs != NULL) | |
676 | q_map |= (1 << queue); | |
677 | } | |
678 | mvreg_write(pp, MVNETA_TXQ_CMD, q_map); | |
679 | ||
680 | /* Enable all initialized RXQs. */ | |
681 | q_map = 0; | |
682 | for (queue = 0; queue < rxq_number; queue++) { | |
683 | struct mvneta_rx_queue *rxq = &pp->rxqs[queue]; | |
684 | if (rxq->descs != NULL) | |
685 | q_map |= (1 << queue); | |
686 | } | |
687 | ||
688 | mvreg_write(pp, MVNETA_RXQ_CMD, q_map); | |
689 | } | |
690 | ||
691 | /* Stop the Ethernet port activity */ | |
692 | static void mvneta_port_down(struct mvneta_port *pp) | |
693 | { | |
694 | u32 val; | |
695 | int count; | |
696 | ||
697 | /* Stop Rx port activity. Check port Rx activity. */ | |
698 | val = mvreg_read(pp, MVNETA_RXQ_CMD) & MVNETA_RXQ_ENABLE_MASK; | |
699 | ||
700 | /* Issue stop command for active channels only */ | |
701 | if (val != 0) | |
702 | mvreg_write(pp, MVNETA_RXQ_CMD, | |
703 | val << MVNETA_RXQ_DISABLE_SHIFT); | |
704 | ||
705 | /* Wait for all Rx activity to terminate. */ | |
706 | count = 0; | |
707 | do { | |
708 | if (count++ >= MVNETA_RX_DISABLE_TIMEOUT_MSEC) { | |
709 | netdev_warn(pp->dev, | |
710 | "TIMEOUT for RX stopped ! rx_queue_cmd: 0x08%x\n", | |
711 | val); | |
712 | break; | |
713 | } | |
714 | mdelay(1); | |
715 | ||
716 | val = mvreg_read(pp, MVNETA_RXQ_CMD); | |
717 | } while (val & 0xff); | |
718 | ||
719 | /* Stop Tx port activity. Check port Tx activity. Issue stop | |
6a20c175 TP |
720 | * command for active channels only |
721 | */ | |
c5aff182 TP |
722 | val = (mvreg_read(pp, MVNETA_TXQ_CMD)) & MVNETA_TXQ_ENABLE_MASK; |
723 | ||
724 | if (val != 0) | |
725 | mvreg_write(pp, MVNETA_TXQ_CMD, | |
726 | (val << MVNETA_TXQ_DISABLE_SHIFT)); | |
727 | ||
728 | /* Wait for all Tx activity to terminate. */ | |
729 | count = 0; | |
730 | do { | |
731 | if (count++ >= MVNETA_TX_DISABLE_TIMEOUT_MSEC) { | |
732 | netdev_warn(pp->dev, | |
733 | "TIMEOUT for TX stopped status=0x%08x\n", | |
734 | val); | |
735 | break; | |
736 | } | |
737 | mdelay(1); | |
738 | ||
739 | /* Check TX Command reg that all Txqs are stopped */ | |
740 | val = mvreg_read(pp, MVNETA_TXQ_CMD); | |
741 | ||
742 | } while (val & 0xff); | |
743 | ||
744 | /* Double check to verify that TX FIFO is empty */ | |
745 | count = 0; | |
746 | do { | |
747 | if (count++ >= MVNETA_TX_FIFO_EMPTY_TIMEOUT) { | |
748 | netdev_warn(pp->dev, | |
749 | "TX FIFO empty timeout status=0x08%x\n", | |
750 | val); | |
751 | break; | |
752 | } | |
753 | mdelay(1); | |
754 | ||
755 | val = mvreg_read(pp, MVNETA_PORT_STATUS); | |
756 | } while (!(val & MVNETA_TX_FIFO_EMPTY) && | |
757 | (val & MVNETA_TX_IN_PRGRS)); | |
758 | ||
759 | udelay(200); | |
760 | } | |
761 | ||
762 | /* Enable the port by setting the port enable bit of the MAC control register */ | |
763 | static void mvneta_port_enable(struct mvneta_port *pp) | |
764 | { | |
765 | u32 val; | |
766 | ||
767 | /* Enable port */ | |
768 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
769 | val |= MVNETA_GMAC0_PORT_ENABLE; | |
770 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
771 | } | |
772 | ||
773 | /* Disable the port and wait for about 200 usec before retuning */ | |
774 | static void mvneta_port_disable(struct mvneta_port *pp) | |
775 | { | |
776 | u32 val; | |
777 | ||
778 | /* Reset the Enable bit in the Serial Control Register */ | |
779 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_0); | |
780 | val &= ~MVNETA_GMAC0_PORT_ENABLE; | |
781 | mvreg_write(pp, MVNETA_GMAC_CTRL_0, val); | |
782 | ||
783 | udelay(200); | |
784 | } | |
785 | ||
786 | /* Multicast tables methods */ | |
787 | ||
788 | /* Set all entries in Unicast MAC Table; queue==-1 means reject all */ | |
789 | static void mvneta_set_ucast_table(struct mvneta_port *pp, int queue) | |
790 | { | |
791 | int offset; | |
792 | u32 val; | |
793 | ||
794 | if (queue == -1) { | |
795 | val = 0; | |
796 | } else { | |
797 | val = 0x1 | (queue << 1); | |
798 | val |= (val << 24) | (val << 16) | (val << 8); | |
799 | } | |
800 | ||
801 | for (offset = 0; offset <= 0xc; offset += 4) | |
802 | mvreg_write(pp, MVNETA_DA_FILT_UCAST_BASE + offset, val); | |
803 | } | |
804 | ||
805 | /* Set all entries in Special Multicast MAC Table; queue==-1 means reject all */ | |
806 | static void mvneta_set_special_mcast_table(struct mvneta_port *pp, int queue) | |
807 | { | |
808 | int offset; | |
809 | u32 val; | |
810 | ||
811 | if (queue == -1) { | |
812 | val = 0; | |
813 | } else { | |
814 | val = 0x1 | (queue << 1); | |
815 | val |= (val << 24) | (val << 16) | (val << 8); | |
816 | } | |
817 | ||
818 | for (offset = 0; offset <= 0xfc; offset += 4) | |
819 | mvreg_write(pp, MVNETA_DA_FILT_SPEC_MCAST + offset, val); | |
820 | ||
821 | } | |
822 | ||
823 | /* Set all entries in Other Multicast MAC Table. queue==-1 means reject all */ | |
824 | static void mvneta_set_other_mcast_table(struct mvneta_port *pp, int queue) | |
825 | { | |
826 | int offset; | |
827 | u32 val; | |
828 | ||
829 | if (queue == -1) { | |
830 | memset(pp->mcast_count, 0, sizeof(pp->mcast_count)); | |
831 | val = 0; | |
832 | } else { | |
833 | memset(pp->mcast_count, 1, sizeof(pp->mcast_count)); | |
834 | val = 0x1 | (queue << 1); | |
835 | val |= (val << 24) | (val << 16) | (val << 8); | |
836 | } | |
837 | ||
838 | for (offset = 0; offset <= 0xfc; offset += 4) | |
839 | mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + offset, val); | |
840 | } | |
841 | ||
842 | /* This method sets defaults to the NETA port: | |
843 | * Clears interrupt Cause and Mask registers. | |
844 | * Clears all MAC tables. | |
845 | * Sets defaults to all registers. | |
846 | * Resets RX and TX descriptor rings. | |
847 | * Resets PHY. | |
848 | * This method can be called after mvneta_port_down() to return the port | |
849 | * settings to defaults. | |
850 | */ | |
851 | static void mvneta_defaults_set(struct mvneta_port *pp) | |
852 | { | |
853 | int cpu; | |
854 | int queue; | |
855 | u32 val; | |
856 | ||
857 | /* Clear all Cause registers */ | |
858 | mvreg_write(pp, MVNETA_INTR_NEW_CAUSE, 0); | |
859 | mvreg_write(pp, MVNETA_INTR_OLD_CAUSE, 0); | |
860 | mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0); | |
861 | ||
862 | /* Mask all interrupts */ | |
863 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
864 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
865 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
866 | mvreg_write(pp, MVNETA_INTR_ENABLE, 0); | |
867 | ||
868 | /* Enable MBUS Retry bit16 */ | |
869 | mvreg_write(pp, MVNETA_MBUS_RETRY, 0x20); | |
870 | ||
871 | /* Set CPU queue access map - all CPUs have access to all RX | |
6a20c175 TP |
872 | * queues and to all TX queues |
873 | */ | |
c5aff182 TP |
874 | for (cpu = 0; cpu < CONFIG_NR_CPUS; cpu++) |
875 | mvreg_write(pp, MVNETA_CPU_MAP(cpu), | |
876 | (MVNETA_CPU_RXQ_ACCESS_ALL_MASK | | |
877 | MVNETA_CPU_TXQ_ACCESS_ALL_MASK)); | |
878 | ||
879 | /* Reset RX and TX DMAs */ | |
880 | mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET); | |
881 | mvreg_write(pp, MVNETA_PORT_TX_RESET, MVNETA_PORT_TX_DMA_RESET); | |
882 | ||
883 | /* Disable Legacy WRR, Disable EJP, Release from reset */ | |
884 | mvreg_write(pp, MVNETA_TXQ_CMD_1, 0); | |
885 | for (queue = 0; queue < txq_number; queue++) { | |
886 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(queue), 0); | |
887 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(queue), 0); | |
888 | } | |
889 | ||
890 | mvreg_write(pp, MVNETA_PORT_TX_RESET, 0); | |
891 | mvreg_write(pp, MVNETA_PORT_RX_RESET, 0); | |
892 | ||
893 | /* Set Port Acceleration Mode */ | |
894 | val = MVNETA_ACC_MODE_EXT; | |
895 | mvreg_write(pp, MVNETA_ACC_MODE, val); | |
896 | ||
897 | /* Update val of portCfg register accordingly with all RxQueue types */ | |
898 | val = MVNETA_PORT_CONFIG_DEFL_VALUE(rxq_def); | |
899 | mvreg_write(pp, MVNETA_PORT_CONFIG, val); | |
900 | ||
901 | val = 0; | |
902 | mvreg_write(pp, MVNETA_PORT_CONFIG_EXTEND, val); | |
903 | mvreg_write(pp, MVNETA_RX_MIN_FRAME_SIZE, 64); | |
904 | ||
905 | /* Build PORT_SDMA_CONFIG_REG */ | |
906 | val = 0; | |
907 | ||
908 | /* Default burst size */ | |
909 | val |= MVNETA_TX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16); | |
910 | val |= MVNETA_RX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16); | |
911 | ||
912 | val |= (MVNETA_RX_NO_DATA_SWAP | MVNETA_TX_NO_DATA_SWAP | | |
913 | MVNETA_NO_DESC_SWAP); | |
914 | ||
915 | /* Assign port SDMA configuration */ | |
916 | mvreg_write(pp, MVNETA_SDMA_CONFIG, val); | |
917 | ||
918 | mvneta_set_ucast_table(pp, -1); | |
919 | mvneta_set_special_mcast_table(pp, -1); | |
920 | mvneta_set_other_mcast_table(pp, -1); | |
921 | ||
922 | /* Set port interrupt enable register - default enable all */ | |
923 | mvreg_write(pp, MVNETA_INTR_ENABLE, | |
924 | (MVNETA_RXQ_INTR_ENABLE_ALL_MASK | |
925 | | MVNETA_TXQ_INTR_ENABLE_ALL_MASK)); | |
926 | } | |
927 | ||
928 | /* Set max sizes for tx queues */ | |
929 | static void mvneta_txq_max_tx_size_set(struct mvneta_port *pp, int max_tx_size) | |
930 | ||
931 | { | |
932 | u32 val, size, mtu; | |
933 | int queue; | |
934 | ||
935 | mtu = max_tx_size * 8; | |
936 | if (mtu > MVNETA_TX_MTU_MAX) | |
937 | mtu = MVNETA_TX_MTU_MAX; | |
938 | ||
939 | /* Set MTU */ | |
940 | val = mvreg_read(pp, MVNETA_TX_MTU); | |
941 | val &= ~MVNETA_TX_MTU_MAX; | |
942 | val |= mtu; | |
943 | mvreg_write(pp, MVNETA_TX_MTU, val); | |
944 | ||
945 | /* TX token size and all TXQs token size must be larger that MTU */ | |
946 | val = mvreg_read(pp, MVNETA_TX_TOKEN_SIZE); | |
947 | ||
948 | size = val & MVNETA_TX_TOKEN_SIZE_MAX; | |
949 | if (size < mtu) { | |
950 | size = mtu; | |
951 | val &= ~MVNETA_TX_TOKEN_SIZE_MAX; | |
952 | val |= size; | |
953 | mvreg_write(pp, MVNETA_TX_TOKEN_SIZE, val); | |
954 | } | |
955 | for (queue = 0; queue < txq_number; queue++) { | |
956 | val = mvreg_read(pp, MVNETA_TXQ_TOKEN_SIZE_REG(queue)); | |
957 | ||
958 | size = val & MVNETA_TXQ_TOKEN_SIZE_MAX; | |
959 | if (size < mtu) { | |
960 | size = mtu; | |
961 | val &= ~MVNETA_TXQ_TOKEN_SIZE_MAX; | |
962 | val |= size; | |
963 | mvreg_write(pp, MVNETA_TXQ_TOKEN_SIZE_REG(queue), val); | |
964 | } | |
965 | } | |
966 | } | |
967 | ||
968 | /* Set unicast address */ | |
969 | static void mvneta_set_ucast_addr(struct mvneta_port *pp, u8 last_nibble, | |
970 | int queue) | |
971 | { | |
972 | unsigned int unicast_reg; | |
973 | unsigned int tbl_offset; | |
974 | unsigned int reg_offset; | |
975 | ||
976 | /* Locate the Unicast table entry */ | |
977 | last_nibble = (0xf & last_nibble); | |
978 | ||
979 | /* offset from unicast tbl base */ | |
980 | tbl_offset = (last_nibble / 4) * 4; | |
981 | ||
982 | /* offset within the above reg */ | |
983 | reg_offset = last_nibble % 4; | |
984 | ||
985 | unicast_reg = mvreg_read(pp, (MVNETA_DA_FILT_UCAST_BASE + tbl_offset)); | |
986 | ||
987 | if (queue == -1) { | |
988 | /* Clear accepts frame bit at specified unicast DA tbl entry */ | |
989 | unicast_reg &= ~(0xff << (8 * reg_offset)); | |
990 | } else { | |
991 | unicast_reg &= ~(0xff << (8 * reg_offset)); | |
992 | unicast_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
993 | } | |
994 | ||
995 | mvreg_write(pp, (MVNETA_DA_FILT_UCAST_BASE + tbl_offset), unicast_reg); | |
996 | } | |
997 | ||
998 | /* Set mac address */ | |
999 | static void mvneta_mac_addr_set(struct mvneta_port *pp, unsigned char *addr, | |
1000 | int queue) | |
1001 | { | |
1002 | unsigned int mac_h; | |
1003 | unsigned int mac_l; | |
1004 | ||
1005 | if (queue != -1) { | |
1006 | mac_l = (addr[4] << 8) | (addr[5]); | |
1007 | mac_h = (addr[0] << 24) | (addr[1] << 16) | | |
1008 | (addr[2] << 8) | (addr[3] << 0); | |
1009 | ||
1010 | mvreg_write(pp, MVNETA_MAC_ADDR_LOW, mac_l); | |
1011 | mvreg_write(pp, MVNETA_MAC_ADDR_HIGH, mac_h); | |
1012 | } | |
1013 | ||
1014 | /* Accept frames of this address */ | |
1015 | mvneta_set_ucast_addr(pp, addr[5], queue); | |
1016 | } | |
1017 | ||
6a20c175 TP |
1018 | /* Set the number of packets that will be received before RX interrupt |
1019 | * will be generated by HW. | |
c5aff182 TP |
1020 | */ |
1021 | static void mvneta_rx_pkts_coal_set(struct mvneta_port *pp, | |
1022 | struct mvneta_rx_queue *rxq, u32 value) | |
1023 | { | |
1024 | mvreg_write(pp, MVNETA_RXQ_THRESHOLD_REG(rxq->id), | |
1025 | value | MVNETA_RXQ_NON_OCCUPIED(0)); | |
1026 | rxq->pkts_coal = value; | |
1027 | } | |
1028 | ||
6a20c175 TP |
1029 | /* Set the time delay in usec before RX interrupt will be generated by |
1030 | * HW. | |
c5aff182 TP |
1031 | */ |
1032 | static void mvneta_rx_time_coal_set(struct mvneta_port *pp, | |
1033 | struct mvneta_rx_queue *rxq, u32 value) | |
1034 | { | |
189dd626 TP |
1035 | u32 val; |
1036 | unsigned long clk_rate; | |
1037 | ||
1038 | clk_rate = clk_get_rate(pp->clk); | |
1039 | val = (clk_rate / 1000000) * value; | |
c5aff182 TP |
1040 | |
1041 | mvreg_write(pp, MVNETA_RXQ_TIME_COAL_REG(rxq->id), val); | |
1042 | rxq->time_coal = value; | |
1043 | } | |
1044 | ||
1045 | /* Set threshold for TX_DONE pkts coalescing */ | |
1046 | static void mvneta_tx_done_pkts_coal_set(struct mvneta_port *pp, | |
1047 | struct mvneta_tx_queue *txq, u32 value) | |
1048 | { | |
1049 | u32 val; | |
1050 | ||
1051 | val = mvreg_read(pp, MVNETA_TXQ_SIZE_REG(txq->id)); | |
1052 | ||
1053 | val &= ~MVNETA_TXQ_SENT_THRESH_ALL_MASK; | |
1054 | val |= MVNETA_TXQ_SENT_THRESH_MASK(value); | |
1055 | ||
1056 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), val); | |
1057 | ||
1058 | txq->done_pkts_coal = value; | |
1059 | } | |
1060 | ||
1061 | /* Trigger tx done timer in MVNETA_TX_DONE_TIMER_PERIOD msecs */ | |
1062 | static void mvneta_add_tx_done_timer(struct mvneta_port *pp) | |
1063 | { | |
1064 | if (test_and_set_bit(MVNETA_F_TX_DONE_TIMER_BIT, &pp->flags) == 0) { | |
1065 | pp->tx_done_timer.expires = jiffies + | |
1066 | msecs_to_jiffies(MVNETA_TX_DONE_TIMER_PERIOD); | |
1067 | add_timer(&pp->tx_done_timer); | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | ||
1072 | /* Handle rx descriptor fill by setting buf_cookie and buf_phys_addr */ | |
1073 | static void mvneta_rx_desc_fill(struct mvneta_rx_desc *rx_desc, | |
1074 | u32 phys_addr, u32 cookie) | |
1075 | { | |
1076 | rx_desc->buf_cookie = cookie; | |
1077 | rx_desc->buf_phys_addr = phys_addr; | |
1078 | } | |
1079 | ||
1080 | /* Decrement sent descriptors counter */ | |
1081 | static void mvneta_txq_sent_desc_dec(struct mvneta_port *pp, | |
1082 | struct mvneta_tx_queue *txq, | |
1083 | int sent_desc) | |
1084 | { | |
1085 | u32 val; | |
1086 | ||
1087 | /* Only 255 TX descriptors can be updated at once */ | |
1088 | while (sent_desc > 0xff) { | |
1089 | val = 0xff << MVNETA_TXQ_DEC_SENT_SHIFT; | |
1090 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
1091 | sent_desc = sent_desc - 0xff; | |
1092 | } | |
1093 | ||
1094 | val = sent_desc << MVNETA_TXQ_DEC_SENT_SHIFT; | |
1095 | mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val); | |
1096 | } | |
1097 | ||
1098 | /* Get number of TX descriptors already sent by HW */ | |
1099 | static int mvneta_txq_sent_desc_num_get(struct mvneta_port *pp, | |
1100 | struct mvneta_tx_queue *txq) | |
1101 | { | |
1102 | u32 val; | |
1103 | int sent_desc; | |
1104 | ||
1105 | val = mvreg_read(pp, MVNETA_TXQ_STATUS_REG(txq->id)); | |
1106 | sent_desc = (val & MVNETA_TXQ_SENT_DESC_MASK) >> | |
1107 | MVNETA_TXQ_SENT_DESC_SHIFT; | |
1108 | ||
1109 | return sent_desc; | |
1110 | } | |
1111 | ||
6a20c175 | 1112 | /* Get number of sent descriptors and decrement counter. |
c5aff182 TP |
1113 | * The number of sent descriptors is returned. |
1114 | */ | |
1115 | static int mvneta_txq_sent_desc_proc(struct mvneta_port *pp, | |
1116 | struct mvneta_tx_queue *txq) | |
1117 | { | |
1118 | int sent_desc; | |
1119 | ||
1120 | /* Get number of sent descriptors */ | |
1121 | sent_desc = mvneta_txq_sent_desc_num_get(pp, txq); | |
1122 | ||
1123 | /* Decrement sent descriptors counter */ | |
1124 | if (sent_desc) | |
1125 | mvneta_txq_sent_desc_dec(pp, txq, sent_desc); | |
1126 | ||
1127 | return sent_desc; | |
1128 | } | |
1129 | ||
1130 | /* Set TXQ descriptors fields relevant for CSUM calculation */ | |
1131 | static u32 mvneta_txq_desc_csum(int l3_offs, int l3_proto, | |
1132 | int ip_hdr_len, int l4_proto) | |
1133 | { | |
1134 | u32 command; | |
1135 | ||
1136 | /* Fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk, | |
6a20c175 TP |
1137 | * G_L4_chk, L4_type; required only for checksum |
1138 | * calculation | |
1139 | */ | |
c5aff182 TP |
1140 | command = l3_offs << MVNETA_TX_L3_OFF_SHIFT; |
1141 | command |= ip_hdr_len << MVNETA_TX_IP_HLEN_SHIFT; | |
1142 | ||
1143 | if (l3_proto == swab16(ETH_P_IP)) | |
1144 | command |= MVNETA_TXD_IP_CSUM; | |
1145 | else | |
1146 | command |= MVNETA_TX_L3_IP6; | |
1147 | ||
1148 | if (l4_proto == IPPROTO_TCP) | |
1149 | command |= MVNETA_TX_L4_CSUM_FULL; | |
1150 | else if (l4_proto == IPPROTO_UDP) | |
1151 | command |= MVNETA_TX_L4_UDP | MVNETA_TX_L4_CSUM_FULL; | |
1152 | else | |
1153 | command |= MVNETA_TX_L4_CSUM_NOT; | |
1154 | ||
1155 | return command; | |
1156 | } | |
1157 | ||
1158 | ||
1159 | /* Display more error info */ | |
1160 | static void mvneta_rx_error(struct mvneta_port *pp, | |
1161 | struct mvneta_rx_desc *rx_desc) | |
1162 | { | |
1163 | u32 status = rx_desc->status; | |
1164 | ||
1165 | if (!mvneta_rxq_desc_is_first_last(rx_desc)) { | |
1166 | netdev_err(pp->dev, | |
1167 | "bad rx status %08x (buffer oversize), size=%d\n", | |
1168 | rx_desc->status, rx_desc->data_size); | |
1169 | return; | |
1170 | } | |
1171 | ||
1172 | switch (status & MVNETA_RXD_ERR_CODE_MASK) { | |
1173 | case MVNETA_RXD_ERR_CRC: | |
1174 | netdev_err(pp->dev, "bad rx status %08x (crc error), size=%d\n", | |
1175 | status, rx_desc->data_size); | |
1176 | break; | |
1177 | case MVNETA_RXD_ERR_OVERRUN: | |
1178 | netdev_err(pp->dev, "bad rx status %08x (overrun error), size=%d\n", | |
1179 | status, rx_desc->data_size); | |
1180 | break; | |
1181 | case MVNETA_RXD_ERR_LEN: | |
1182 | netdev_err(pp->dev, "bad rx status %08x (max frame length error), size=%d\n", | |
1183 | status, rx_desc->data_size); | |
1184 | break; | |
1185 | case MVNETA_RXD_ERR_RESOURCE: | |
1186 | netdev_err(pp->dev, "bad rx status %08x (resource error), size=%d\n", | |
1187 | status, rx_desc->data_size); | |
1188 | break; | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | /* Handle RX checksum offload */ | |
1193 | static void mvneta_rx_csum(struct mvneta_port *pp, | |
1194 | struct mvneta_rx_desc *rx_desc, | |
1195 | struct sk_buff *skb) | |
1196 | { | |
1197 | if ((rx_desc->status & MVNETA_RXD_L3_IP4) && | |
1198 | (rx_desc->status & MVNETA_RXD_L4_CSUM_OK)) { | |
1199 | skb->csum = 0; | |
1200 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1201 | return; | |
1202 | } | |
1203 | ||
1204 | skb->ip_summed = CHECKSUM_NONE; | |
1205 | } | |
1206 | ||
1207 | /* Return tx queue pointer (find last set bit) according to causeTxDone reg */ | |
1208 | static struct mvneta_tx_queue *mvneta_tx_done_policy(struct mvneta_port *pp, | |
1209 | u32 cause) | |
1210 | { | |
1211 | int queue = fls(cause) - 1; | |
1212 | ||
1213 | return (queue < 0 || queue >= txq_number) ? NULL : &pp->txqs[queue]; | |
1214 | } | |
1215 | ||
1216 | /* Free tx queue skbuffs */ | |
1217 | static void mvneta_txq_bufs_free(struct mvneta_port *pp, | |
1218 | struct mvneta_tx_queue *txq, int num) | |
1219 | { | |
1220 | int i; | |
1221 | ||
1222 | for (i = 0; i < num; i++) { | |
1223 | struct mvneta_tx_desc *tx_desc = txq->descs + | |
1224 | txq->txq_get_index; | |
1225 | struct sk_buff *skb = txq->tx_skb[txq->txq_get_index]; | |
1226 | ||
1227 | mvneta_txq_inc_get(txq); | |
1228 | ||
1229 | if (!skb) | |
1230 | continue; | |
1231 | ||
1232 | dma_unmap_single(pp->dev->dev.parent, tx_desc->buf_phys_addr, | |
1233 | tx_desc->data_size, DMA_TO_DEVICE); | |
1234 | dev_kfree_skb_any(skb); | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | /* Handle end of transmission */ | |
1239 | static int mvneta_txq_done(struct mvneta_port *pp, | |
1240 | struct mvneta_tx_queue *txq) | |
1241 | { | |
1242 | struct netdev_queue *nq = netdev_get_tx_queue(pp->dev, txq->id); | |
1243 | int tx_done; | |
1244 | ||
1245 | tx_done = mvneta_txq_sent_desc_proc(pp, txq); | |
1246 | if (tx_done == 0) | |
1247 | return tx_done; | |
1248 | mvneta_txq_bufs_free(pp, txq, tx_done); | |
1249 | ||
1250 | txq->count -= tx_done; | |
1251 | ||
1252 | if (netif_tx_queue_stopped(nq)) { | |
1253 | if (txq->size - txq->count >= MAX_SKB_FRAGS + 1) | |
1254 | netif_tx_wake_queue(nq); | |
1255 | } | |
1256 | ||
1257 | return tx_done; | |
1258 | } | |
1259 | ||
1260 | /* Refill processing */ | |
1261 | static int mvneta_rx_refill(struct mvneta_port *pp, | |
1262 | struct mvneta_rx_desc *rx_desc) | |
1263 | ||
1264 | { | |
1265 | dma_addr_t phys_addr; | |
1266 | struct sk_buff *skb; | |
1267 | ||
1268 | skb = netdev_alloc_skb(pp->dev, pp->pkt_size); | |
1269 | if (!skb) | |
1270 | return -ENOMEM; | |
1271 | ||
1272 | phys_addr = dma_map_single(pp->dev->dev.parent, skb->head, | |
1273 | MVNETA_RX_BUF_SIZE(pp->pkt_size), | |
1274 | DMA_FROM_DEVICE); | |
1275 | if (unlikely(dma_mapping_error(pp->dev->dev.parent, phys_addr))) { | |
1276 | dev_kfree_skb(skb); | |
1277 | return -ENOMEM; | |
1278 | } | |
1279 | ||
1280 | mvneta_rx_desc_fill(rx_desc, phys_addr, (u32)skb); | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | /* Handle tx checksum */ | |
1286 | static u32 mvneta_skb_tx_csum(struct mvneta_port *pp, struct sk_buff *skb) | |
1287 | { | |
1288 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
1289 | int ip_hdr_len = 0; | |
1290 | u8 l4_proto; | |
1291 | ||
1292 | if (skb->protocol == htons(ETH_P_IP)) { | |
1293 | struct iphdr *ip4h = ip_hdr(skb); | |
1294 | ||
1295 | /* Calculate IPv4 checksum and L4 checksum */ | |
1296 | ip_hdr_len = ip4h->ihl; | |
1297 | l4_proto = ip4h->protocol; | |
1298 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
1299 | struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
1300 | ||
1301 | /* Read l4_protocol from one of IPv6 extra headers */ | |
1302 | if (skb_network_header_len(skb) > 0) | |
1303 | ip_hdr_len = (skb_network_header_len(skb) >> 2); | |
1304 | l4_proto = ip6h->nexthdr; | |
1305 | } else | |
1306 | return MVNETA_TX_L4_CSUM_NOT; | |
1307 | ||
1308 | return mvneta_txq_desc_csum(skb_network_offset(skb), | |
1309 | skb->protocol, ip_hdr_len, l4_proto); | |
1310 | } | |
1311 | ||
1312 | return MVNETA_TX_L4_CSUM_NOT; | |
1313 | } | |
1314 | ||
6a20c175 | 1315 | /* Returns rx queue pointer (find last set bit) according to causeRxTx |
c5aff182 TP |
1316 | * value |
1317 | */ | |
1318 | static struct mvneta_rx_queue *mvneta_rx_policy(struct mvneta_port *pp, | |
1319 | u32 cause) | |
1320 | { | |
1321 | int queue = fls(cause >> 8) - 1; | |
1322 | ||
1323 | return (queue < 0 || queue >= rxq_number) ? NULL : &pp->rxqs[queue]; | |
1324 | } | |
1325 | ||
1326 | /* Drop packets received by the RXQ and free buffers */ | |
1327 | static void mvneta_rxq_drop_pkts(struct mvneta_port *pp, | |
1328 | struct mvneta_rx_queue *rxq) | |
1329 | { | |
1330 | int rx_done, i; | |
1331 | ||
1332 | rx_done = mvneta_rxq_busy_desc_num_get(pp, rxq); | |
1333 | for (i = 0; i < rxq->size; i++) { | |
1334 | struct mvneta_rx_desc *rx_desc = rxq->descs + i; | |
1335 | struct sk_buff *skb = (struct sk_buff *)rx_desc->buf_cookie; | |
1336 | ||
1337 | dev_kfree_skb_any(skb); | |
1338 | dma_unmap_single(pp->dev->dev.parent, rx_desc->buf_phys_addr, | |
1339 | rx_desc->data_size, DMA_FROM_DEVICE); | |
1340 | } | |
1341 | ||
1342 | if (rx_done) | |
1343 | mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_done); | |
1344 | } | |
1345 | ||
1346 | /* Main rx processing */ | |
1347 | static int mvneta_rx(struct mvneta_port *pp, int rx_todo, | |
1348 | struct mvneta_rx_queue *rxq) | |
1349 | { | |
1350 | struct net_device *dev = pp->dev; | |
1351 | int rx_done, rx_filled; | |
1352 | ||
1353 | /* Get number of received packets */ | |
1354 | rx_done = mvneta_rxq_busy_desc_num_get(pp, rxq); | |
1355 | ||
1356 | if (rx_todo > rx_done) | |
1357 | rx_todo = rx_done; | |
1358 | ||
1359 | rx_done = 0; | |
1360 | rx_filled = 0; | |
1361 | ||
1362 | /* Fairness NAPI loop */ | |
1363 | while (rx_done < rx_todo) { | |
1364 | struct mvneta_rx_desc *rx_desc = mvneta_rxq_next_desc_get(rxq); | |
1365 | struct sk_buff *skb; | |
1366 | u32 rx_status; | |
1367 | int rx_bytes, err; | |
1368 | ||
1369 | prefetch(rx_desc); | |
1370 | rx_done++; | |
1371 | rx_filled++; | |
1372 | rx_status = rx_desc->status; | |
1373 | skb = (struct sk_buff *)rx_desc->buf_cookie; | |
1374 | ||
1375 | if (!mvneta_rxq_desc_is_first_last(rx_desc) || | |
1376 | (rx_status & MVNETA_RXD_ERR_SUMMARY)) { | |
1377 | dev->stats.rx_errors++; | |
1378 | mvneta_rx_error(pp, rx_desc); | |
1379 | mvneta_rx_desc_fill(rx_desc, rx_desc->buf_phys_addr, | |
1380 | (u32)skb); | |
1381 | continue; | |
1382 | } | |
1383 | ||
1384 | dma_unmap_single(pp->dev->dev.parent, rx_desc->buf_phys_addr, | |
1385 | rx_desc->data_size, DMA_FROM_DEVICE); | |
1386 | ||
1387 | rx_bytes = rx_desc->data_size - | |
1388 | (ETH_FCS_LEN + MVNETA_MH_SIZE); | |
1389 | u64_stats_update_begin(&pp->rx_stats.syncp); | |
1390 | pp->rx_stats.packets++; | |
1391 | pp->rx_stats.bytes += rx_bytes; | |
1392 | u64_stats_update_end(&pp->rx_stats.syncp); | |
1393 | ||
1394 | /* Linux processing */ | |
1395 | skb_reserve(skb, MVNETA_MH_SIZE); | |
1396 | skb_put(skb, rx_bytes); | |
1397 | ||
1398 | skb->protocol = eth_type_trans(skb, dev); | |
1399 | ||
1400 | mvneta_rx_csum(pp, rx_desc, skb); | |
1401 | ||
1402 | napi_gro_receive(&pp->napi, skb); | |
1403 | ||
1404 | /* Refill processing */ | |
1405 | err = mvneta_rx_refill(pp, rx_desc); | |
1406 | if (err) { | |
1407 | netdev_err(pp->dev, "Linux processing - Can't refill\n"); | |
1408 | rxq->missed++; | |
1409 | rx_filled--; | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | /* Update rxq management counters */ | |
1414 | mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_filled); | |
1415 | ||
1416 | return rx_done; | |
1417 | } | |
1418 | ||
1419 | /* Handle tx fragmentation processing */ | |
1420 | static int mvneta_tx_frag_process(struct mvneta_port *pp, struct sk_buff *skb, | |
1421 | struct mvneta_tx_queue *txq) | |
1422 | { | |
1423 | struct mvneta_tx_desc *tx_desc; | |
1424 | int i; | |
1425 | ||
1426 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1427 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1428 | void *addr = page_address(frag->page.p) + frag->page_offset; | |
1429 | ||
1430 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1431 | tx_desc->data_size = frag->size; | |
1432 | ||
1433 | tx_desc->buf_phys_addr = | |
1434 | dma_map_single(pp->dev->dev.parent, addr, | |
1435 | tx_desc->data_size, DMA_TO_DEVICE); | |
1436 | ||
1437 | if (dma_mapping_error(pp->dev->dev.parent, | |
1438 | tx_desc->buf_phys_addr)) { | |
1439 | mvneta_txq_desc_put(txq); | |
1440 | goto error; | |
1441 | } | |
1442 | ||
1443 | if (i == (skb_shinfo(skb)->nr_frags - 1)) { | |
1444 | /* Last descriptor */ | |
1445 | tx_desc->command = MVNETA_TXD_L_DESC | MVNETA_TXD_Z_PAD; | |
1446 | ||
1447 | txq->tx_skb[txq->txq_put_index] = skb; | |
1448 | ||
1449 | mvneta_txq_inc_put(txq); | |
1450 | } else { | |
1451 | /* Descriptor in the middle: Not First, Not Last */ | |
1452 | tx_desc->command = 0; | |
1453 | ||
1454 | txq->tx_skb[txq->txq_put_index] = NULL; | |
1455 | mvneta_txq_inc_put(txq); | |
1456 | } | |
1457 | } | |
1458 | ||
1459 | return 0; | |
1460 | ||
1461 | error: | |
1462 | /* Release all descriptors that were used to map fragments of | |
6a20c175 TP |
1463 | * this packet, as well as the corresponding DMA mappings |
1464 | */ | |
c5aff182 TP |
1465 | for (i = i - 1; i >= 0; i--) { |
1466 | tx_desc = txq->descs + i; | |
1467 | dma_unmap_single(pp->dev->dev.parent, | |
1468 | tx_desc->buf_phys_addr, | |
1469 | tx_desc->data_size, | |
1470 | DMA_TO_DEVICE); | |
1471 | mvneta_txq_desc_put(txq); | |
1472 | } | |
1473 | ||
1474 | return -ENOMEM; | |
1475 | } | |
1476 | ||
1477 | /* Main tx processing */ | |
1478 | static int mvneta_tx(struct sk_buff *skb, struct net_device *dev) | |
1479 | { | |
1480 | struct mvneta_port *pp = netdev_priv(dev); | |
ee40a116 WT |
1481 | u16 txq_id = skb_get_queue_mapping(skb); |
1482 | struct mvneta_tx_queue *txq = &pp->txqs[txq_id]; | |
c5aff182 TP |
1483 | struct mvneta_tx_desc *tx_desc; |
1484 | struct netdev_queue *nq; | |
1485 | int frags = 0; | |
1486 | u32 tx_cmd; | |
1487 | ||
1488 | if (!netif_running(dev)) | |
1489 | goto out; | |
1490 | ||
1491 | frags = skb_shinfo(skb)->nr_frags + 1; | |
ee40a116 | 1492 | nq = netdev_get_tx_queue(dev, txq_id); |
c5aff182 TP |
1493 | |
1494 | /* Get a descriptor for the first part of the packet */ | |
1495 | tx_desc = mvneta_txq_next_desc_get(txq); | |
1496 | ||
1497 | tx_cmd = mvneta_skb_tx_csum(pp, skb); | |
1498 | ||
1499 | tx_desc->data_size = skb_headlen(skb); | |
1500 | ||
1501 | tx_desc->buf_phys_addr = dma_map_single(dev->dev.parent, skb->data, | |
1502 | tx_desc->data_size, | |
1503 | DMA_TO_DEVICE); | |
1504 | if (unlikely(dma_mapping_error(dev->dev.parent, | |
1505 | tx_desc->buf_phys_addr))) { | |
1506 | mvneta_txq_desc_put(txq); | |
1507 | frags = 0; | |
1508 | goto out; | |
1509 | } | |
1510 | ||
1511 | if (frags == 1) { | |
1512 | /* First and Last descriptor */ | |
1513 | tx_cmd |= MVNETA_TXD_FLZ_DESC; | |
1514 | tx_desc->command = tx_cmd; | |
1515 | txq->tx_skb[txq->txq_put_index] = skb; | |
1516 | mvneta_txq_inc_put(txq); | |
1517 | } else { | |
1518 | /* First but not Last */ | |
1519 | tx_cmd |= MVNETA_TXD_F_DESC; | |
1520 | txq->tx_skb[txq->txq_put_index] = NULL; | |
1521 | mvneta_txq_inc_put(txq); | |
1522 | tx_desc->command = tx_cmd; | |
1523 | /* Continue with other skb fragments */ | |
1524 | if (mvneta_tx_frag_process(pp, skb, txq)) { | |
1525 | dma_unmap_single(dev->dev.parent, | |
1526 | tx_desc->buf_phys_addr, | |
1527 | tx_desc->data_size, | |
1528 | DMA_TO_DEVICE); | |
1529 | mvneta_txq_desc_put(txq); | |
1530 | frags = 0; | |
1531 | goto out; | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | txq->count += frags; | |
1536 | mvneta_txq_pend_desc_add(pp, txq, frags); | |
1537 | ||
1538 | if (txq->size - txq->count < MAX_SKB_FRAGS + 1) | |
1539 | netif_tx_stop_queue(nq); | |
1540 | ||
1541 | out: | |
1542 | if (frags > 0) { | |
1543 | u64_stats_update_begin(&pp->tx_stats.syncp); | |
1544 | pp->tx_stats.packets++; | |
1545 | pp->tx_stats.bytes += skb->len; | |
1546 | u64_stats_update_end(&pp->tx_stats.syncp); | |
1547 | ||
1548 | } else { | |
1549 | dev->stats.tx_dropped++; | |
1550 | dev_kfree_skb_any(skb); | |
1551 | } | |
1552 | ||
1553 | if (txq->count >= MVNETA_TXDONE_COAL_PKTS) | |
1554 | mvneta_txq_done(pp, txq); | |
1555 | ||
1556 | /* If after calling mvneta_txq_done, count equals | |
6a20c175 TP |
1557 | * frags, we need to set the timer |
1558 | */ | |
c5aff182 TP |
1559 | if (txq->count == frags && frags > 0) |
1560 | mvneta_add_tx_done_timer(pp); | |
1561 | ||
1562 | return NETDEV_TX_OK; | |
1563 | } | |
1564 | ||
1565 | ||
1566 | /* Free tx resources, when resetting a port */ | |
1567 | static void mvneta_txq_done_force(struct mvneta_port *pp, | |
1568 | struct mvneta_tx_queue *txq) | |
1569 | ||
1570 | { | |
1571 | int tx_done = txq->count; | |
1572 | ||
1573 | mvneta_txq_bufs_free(pp, txq, tx_done); | |
1574 | ||
1575 | /* reset txq */ | |
1576 | txq->count = 0; | |
1577 | txq->txq_put_index = 0; | |
1578 | txq->txq_get_index = 0; | |
1579 | } | |
1580 | ||
1581 | /* handle tx done - called from tx done timer callback */ | |
1582 | static u32 mvneta_tx_done_gbe(struct mvneta_port *pp, u32 cause_tx_done, | |
1583 | int *tx_todo) | |
1584 | { | |
1585 | struct mvneta_tx_queue *txq; | |
1586 | u32 tx_done = 0; | |
1587 | struct netdev_queue *nq; | |
1588 | ||
1589 | *tx_todo = 0; | |
1590 | while (cause_tx_done != 0) { | |
1591 | txq = mvneta_tx_done_policy(pp, cause_tx_done); | |
1592 | if (!txq) | |
1593 | break; | |
1594 | ||
1595 | nq = netdev_get_tx_queue(pp->dev, txq->id); | |
1596 | __netif_tx_lock(nq, smp_processor_id()); | |
1597 | ||
1598 | if (txq->count) { | |
1599 | tx_done += mvneta_txq_done(pp, txq); | |
1600 | *tx_todo += txq->count; | |
1601 | } | |
1602 | ||
1603 | __netif_tx_unlock(nq); | |
1604 | cause_tx_done &= ~((1 << txq->id)); | |
1605 | } | |
1606 | ||
1607 | return tx_done; | |
1608 | } | |
1609 | ||
6a20c175 | 1610 | /* Compute crc8 of the specified address, using a unique algorithm , |
c5aff182 TP |
1611 | * according to hw spec, different than generic crc8 algorithm |
1612 | */ | |
1613 | static int mvneta_addr_crc(unsigned char *addr) | |
1614 | { | |
1615 | int crc = 0; | |
1616 | int i; | |
1617 | ||
1618 | for (i = 0; i < ETH_ALEN; i++) { | |
1619 | int j; | |
1620 | ||
1621 | crc = (crc ^ addr[i]) << 8; | |
1622 | for (j = 7; j >= 0; j--) { | |
1623 | if (crc & (0x100 << j)) | |
1624 | crc ^= 0x107 << j; | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | return crc; | |
1629 | } | |
1630 | ||
1631 | /* This method controls the net device special MAC multicast support. | |
1632 | * The Special Multicast Table for MAC addresses supports MAC of the form | |
1633 | * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0xFF). | |
1634 | * The MAC DA[7:0] bits are used as a pointer to the Special Multicast | |
1635 | * Table entries in the DA-Filter table. This method set the Special | |
1636 | * Multicast Table appropriate entry. | |
1637 | */ | |
1638 | static void mvneta_set_special_mcast_addr(struct mvneta_port *pp, | |
1639 | unsigned char last_byte, | |
1640 | int queue) | |
1641 | { | |
1642 | unsigned int smc_table_reg; | |
1643 | unsigned int tbl_offset; | |
1644 | unsigned int reg_offset; | |
1645 | ||
1646 | /* Register offset from SMC table base */ | |
1647 | tbl_offset = (last_byte / 4); | |
1648 | /* Entry offset within the above reg */ | |
1649 | reg_offset = last_byte % 4; | |
1650 | ||
1651 | smc_table_reg = mvreg_read(pp, (MVNETA_DA_FILT_SPEC_MCAST | |
1652 | + tbl_offset * 4)); | |
1653 | ||
1654 | if (queue == -1) | |
1655 | smc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1656 | else { | |
1657 | smc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1658 | smc_table_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
1659 | } | |
1660 | ||
1661 | mvreg_write(pp, MVNETA_DA_FILT_SPEC_MCAST + tbl_offset * 4, | |
1662 | smc_table_reg); | |
1663 | } | |
1664 | ||
1665 | /* This method controls the network device Other MAC multicast support. | |
1666 | * The Other Multicast Table is used for multicast of another type. | |
1667 | * A CRC-8 is used as an index to the Other Multicast Table entries | |
1668 | * in the DA-Filter table. | |
1669 | * The method gets the CRC-8 value from the calling routine and | |
1670 | * sets the Other Multicast Table appropriate entry according to the | |
1671 | * specified CRC-8 . | |
1672 | */ | |
1673 | static void mvneta_set_other_mcast_addr(struct mvneta_port *pp, | |
1674 | unsigned char crc8, | |
1675 | int queue) | |
1676 | { | |
1677 | unsigned int omc_table_reg; | |
1678 | unsigned int tbl_offset; | |
1679 | unsigned int reg_offset; | |
1680 | ||
1681 | tbl_offset = (crc8 / 4) * 4; /* Register offset from OMC table base */ | |
1682 | reg_offset = crc8 % 4; /* Entry offset within the above reg */ | |
1683 | ||
1684 | omc_table_reg = mvreg_read(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset); | |
1685 | ||
1686 | if (queue == -1) { | |
1687 | /* Clear accepts frame bit at specified Other DA table entry */ | |
1688 | omc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1689 | } else { | |
1690 | omc_table_reg &= ~(0xff << (8 * reg_offset)); | |
1691 | omc_table_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset)); | |
1692 | } | |
1693 | ||
1694 | mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset, omc_table_reg); | |
1695 | } | |
1696 | ||
1697 | /* The network device supports multicast using two tables: | |
1698 | * 1) Special Multicast Table for MAC addresses of the form | |
1699 | * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0xFF). | |
1700 | * The MAC DA[7:0] bits are used as a pointer to the Special Multicast | |
1701 | * Table entries in the DA-Filter table. | |
1702 | * 2) Other Multicast Table for multicast of another type. A CRC-8 value | |
1703 | * is used as an index to the Other Multicast Table entries in the | |
1704 | * DA-Filter table. | |
1705 | */ | |
1706 | static int mvneta_mcast_addr_set(struct mvneta_port *pp, unsigned char *p_addr, | |
1707 | int queue) | |
1708 | { | |
1709 | unsigned char crc_result = 0; | |
1710 | ||
1711 | if (memcmp(p_addr, "\x01\x00\x5e\x00\x00", 5) == 0) { | |
1712 | mvneta_set_special_mcast_addr(pp, p_addr[5], queue); | |
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | crc_result = mvneta_addr_crc(p_addr); | |
1717 | if (queue == -1) { | |
1718 | if (pp->mcast_count[crc_result] == 0) { | |
1719 | netdev_info(pp->dev, "No valid Mcast for crc8=0x%02x\n", | |
1720 | crc_result); | |
1721 | return -EINVAL; | |
1722 | } | |
1723 | ||
1724 | pp->mcast_count[crc_result]--; | |
1725 | if (pp->mcast_count[crc_result] != 0) { | |
1726 | netdev_info(pp->dev, | |
1727 | "After delete there are %d valid Mcast for crc8=0x%02x\n", | |
1728 | pp->mcast_count[crc_result], crc_result); | |
1729 | return -EINVAL; | |
1730 | } | |
1731 | } else | |
1732 | pp->mcast_count[crc_result]++; | |
1733 | ||
1734 | mvneta_set_other_mcast_addr(pp, crc_result, queue); | |
1735 | ||
1736 | return 0; | |
1737 | } | |
1738 | ||
1739 | /* Configure Fitering mode of Ethernet port */ | |
1740 | static void mvneta_rx_unicast_promisc_set(struct mvneta_port *pp, | |
1741 | int is_promisc) | |
1742 | { | |
1743 | u32 port_cfg_reg, val; | |
1744 | ||
1745 | port_cfg_reg = mvreg_read(pp, MVNETA_PORT_CONFIG); | |
1746 | ||
1747 | val = mvreg_read(pp, MVNETA_TYPE_PRIO); | |
1748 | ||
1749 | /* Set / Clear UPM bit in port configuration register */ | |
1750 | if (is_promisc) { | |
1751 | /* Accept all Unicast addresses */ | |
1752 | port_cfg_reg |= MVNETA_UNI_PROMISC_MODE; | |
1753 | val |= MVNETA_FORCE_UNI; | |
1754 | mvreg_write(pp, MVNETA_MAC_ADDR_LOW, 0xffff); | |
1755 | mvreg_write(pp, MVNETA_MAC_ADDR_HIGH, 0xffffffff); | |
1756 | } else { | |
1757 | /* Reject all Unicast addresses */ | |
1758 | port_cfg_reg &= ~MVNETA_UNI_PROMISC_MODE; | |
1759 | val &= ~MVNETA_FORCE_UNI; | |
1760 | } | |
1761 | ||
1762 | mvreg_write(pp, MVNETA_PORT_CONFIG, port_cfg_reg); | |
1763 | mvreg_write(pp, MVNETA_TYPE_PRIO, val); | |
1764 | } | |
1765 | ||
1766 | /* register unicast and multicast addresses */ | |
1767 | static void mvneta_set_rx_mode(struct net_device *dev) | |
1768 | { | |
1769 | struct mvneta_port *pp = netdev_priv(dev); | |
1770 | struct netdev_hw_addr *ha; | |
1771 | ||
1772 | if (dev->flags & IFF_PROMISC) { | |
1773 | /* Accept all: Multicast + Unicast */ | |
1774 | mvneta_rx_unicast_promisc_set(pp, 1); | |
1775 | mvneta_set_ucast_table(pp, rxq_def); | |
1776 | mvneta_set_special_mcast_table(pp, rxq_def); | |
1777 | mvneta_set_other_mcast_table(pp, rxq_def); | |
1778 | } else { | |
1779 | /* Accept single Unicast */ | |
1780 | mvneta_rx_unicast_promisc_set(pp, 0); | |
1781 | mvneta_set_ucast_table(pp, -1); | |
1782 | mvneta_mac_addr_set(pp, dev->dev_addr, rxq_def); | |
1783 | ||
1784 | if (dev->flags & IFF_ALLMULTI) { | |
1785 | /* Accept all multicast */ | |
1786 | mvneta_set_special_mcast_table(pp, rxq_def); | |
1787 | mvneta_set_other_mcast_table(pp, rxq_def); | |
1788 | } else { | |
1789 | /* Accept only initialized multicast */ | |
1790 | mvneta_set_special_mcast_table(pp, -1); | |
1791 | mvneta_set_other_mcast_table(pp, -1); | |
1792 | ||
1793 | if (!netdev_mc_empty(dev)) { | |
1794 | netdev_for_each_mc_addr(ha, dev) { | |
1795 | mvneta_mcast_addr_set(pp, ha->addr, | |
1796 | rxq_def); | |
1797 | } | |
1798 | } | |
1799 | } | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | /* Interrupt handling - the callback for request_irq() */ | |
1804 | static irqreturn_t mvneta_isr(int irq, void *dev_id) | |
1805 | { | |
1806 | struct mvneta_port *pp = (struct mvneta_port *)dev_id; | |
1807 | ||
1808 | /* Mask all interrupts */ | |
1809 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
1810 | ||
1811 | napi_schedule(&pp->napi); | |
1812 | ||
1813 | return IRQ_HANDLED; | |
1814 | } | |
1815 | ||
1816 | /* NAPI handler | |
1817 | * Bits 0 - 7 of the causeRxTx register indicate that are transmitted | |
1818 | * packets on the corresponding TXQ (Bit 0 is for TX queue 1). | |
1819 | * Bits 8 -15 of the cause Rx Tx register indicate that are received | |
1820 | * packets on the corresponding RXQ (Bit 8 is for RX queue 0). | |
1821 | * Each CPU has its own causeRxTx register | |
1822 | */ | |
1823 | static int mvneta_poll(struct napi_struct *napi, int budget) | |
1824 | { | |
1825 | int rx_done = 0; | |
1826 | u32 cause_rx_tx; | |
1827 | unsigned long flags; | |
1828 | struct mvneta_port *pp = netdev_priv(napi->dev); | |
1829 | ||
1830 | if (!netif_running(pp->dev)) { | |
1831 | napi_complete(napi); | |
1832 | return rx_done; | |
1833 | } | |
1834 | ||
1835 | /* Read cause register */ | |
1836 | cause_rx_tx = mvreg_read(pp, MVNETA_INTR_NEW_CAUSE) & | |
1837 | MVNETA_RX_INTR_MASK(rxq_number); | |
1838 | ||
6a20c175 | 1839 | /* For the case where the last mvneta_poll did not process all |
c5aff182 TP |
1840 | * RX packets |
1841 | */ | |
1842 | cause_rx_tx |= pp->cause_rx_tx; | |
1843 | if (rxq_number > 1) { | |
1844 | while ((cause_rx_tx != 0) && (budget > 0)) { | |
1845 | int count; | |
1846 | struct mvneta_rx_queue *rxq; | |
1847 | /* get rx queue number from cause_rx_tx */ | |
1848 | rxq = mvneta_rx_policy(pp, cause_rx_tx); | |
1849 | if (!rxq) | |
1850 | break; | |
1851 | ||
1852 | /* process the packet in that rx queue */ | |
1853 | count = mvneta_rx(pp, budget, rxq); | |
1854 | rx_done += count; | |
1855 | budget -= count; | |
1856 | if (budget > 0) { | |
6a20c175 TP |
1857 | /* set off the rx bit of the |
1858 | * corresponding bit in the cause rx | |
1859 | * tx register, so that next iteration | |
1860 | * will find the next rx queue where | |
1861 | * packets are received on | |
1862 | */ | |
c5aff182 TP |
1863 | cause_rx_tx &= ~((1 << rxq->id) << 8); |
1864 | } | |
1865 | } | |
1866 | } else { | |
1867 | rx_done = mvneta_rx(pp, budget, &pp->rxqs[rxq_def]); | |
1868 | budget -= rx_done; | |
1869 | } | |
1870 | ||
1871 | if (budget > 0) { | |
1872 | cause_rx_tx = 0; | |
1873 | napi_complete(napi); | |
1874 | local_irq_save(flags); | |
1875 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, | |
1876 | MVNETA_RX_INTR_MASK(rxq_number)); | |
1877 | local_irq_restore(flags); | |
1878 | } | |
1879 | ||
1880 | pp->cause_rx_tx = cause_rx_tx; | |
1881 | return rx_done; | |
1882 | } | |
1883 | ||
1884 | /* tx done timer callback */ | |
1885 | static void mvneta_tx_done_timer_callback(unsigned long data) | |
1886 | { | |
1887 | struct net_device *dev = (struct net_device *)data; | |
1888 | struct mvneta_port *pp = netdev_priv(dev); | |
1889 | int tx_done = 0, tx_todo = 0; | |
1890 | ||
1891 | if (!netif_running(dev)) | |
1892 | return ; | |
1893 | ||
1894 | clear_bit(MVNETA_F_TX_DONE_TIMER_BIT, &pp->flags); | |
1895 | ||
1896 | tx_done = mvneta_tx_done_gbe(pp, | |
1897 | (((1 << txq_number) - 1) & | |
1898 | MVNETA_CAUSE_TXQ_SENT_DESC_ALL_MASK), | |
1899 | &tx_todo); | |
1900 | if (tx_todo > 0) | |
1901 | mvneta_add_tx_done_timer(pp); | |
1902 | } | |
1903 | ||
1904 | /* Handle rxq fill: allocates rxq skbs; called when initializing a port */ | |
1905 | static int mvneta_rxq_fill(struct mvneta_port *pp, struct mvneta_rx_queue *rxq, | |
1906 | int num) | |
1907 | { | |
1908 | struct net_device *dev = pp->dev; | |
1909 | int i; | |
1910 | ||
1911 | for (i = 0; i < num; i++) { | |
1912 | struct sk_buff *skb; | |
1913 | struct mvneta_rx_desc *rx_desc; | |
1914 | unsigned long phys_addr; | |
1915 | ||
1916 | skb = dev_alloc_skb(pp->pkt_size); | |
1917 | if (!skb) { | |
1918 | netdev_err(dev, "%s:rxq %d, %d of %d buffs filled\n", | |
1919 | __func__, rxq->id, i, num); | |
1920 | break; | |
1921 | } | |
1922 | ||
1923 | rx_desc = rxq->descs + i; | |
1924 | memset(rx_desc, 0, sizeof(struct mvneta_rx_desc)); | |
1925 | phys_addr = dma_map_single(dev->dev.parent, skb->head, | |
1926 | MVNETA_RX_BUF_SIZE(pp->pkt_size), | |
1927 | DMA_FROM_DEVICE); | |
1928 | if (unlikely(dma_mapping_error(dev->dev.parent, phys_addr))) { | |
1929 | dev_kfree_skb(skb); | |
1930 | break; | |
1931 | } | |
1932 | ||
1933 | mvneta_rx_desc_fill(rx_desc, phys_addr, (u32)skb); | |
1934 | } | |
1935 | ||
1936 | /* Add this number of RX descriptors as non occupied (ready to | |
6a20c175 TP |
1937 | * get packets) |
1938 | */ | |
c5aff182 TP |
1939 | mvneta_rxq_non_occup_desc_add(pp, rxq, i); |
1940 | ||
1941 | return i; | |
1942 | } | |
1943 | ||
1944 | /* Free all packets pending transmit from all TXQs and reset TX port */ | |
1945 | static void mvneta_tx_reset(struct mvneta_port *pp) | |
1946 | { | |
1947 | int queue; | |
1948 | ||
1949 | /* free the skb's in the hal tx ring */ | |
1950 | for (queue = 0; queue < txq_number; queue++) | |
1951 | mvneta_txq_done_force(pp, &pp->txqs[queue]); | |
1952 | ||
1953 | mvreg_write(pp, MVNETA_PORT_TX_RESET, MVNETA_PORT_TX_DMA_RESET); | |
1954 | mvreg_write(pp, MVNETA_PORT_TX_RESET, 0); | |
1955 | } | |
1956 | ||
1957 | static void mvneta_rx_reset(struct mvneta_port *pp) | |
1958 | { | |
1959 | mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET); | |
1960 | mvreg_write(pp, MVNETA_PORT_RX_RESET, 0); | |
1961 | } | |
1962 | ||
1963 | /* Rx/Tx queue initialization/cleanup methods */ | |
1964 | ||
1965 | /* Create a specified RX queue */ | |
1966 | static int mvneta_rxq_init(struct mvneta_port *pp, | |
1967 | struct mvneta_rx_queue *rxq) | |
1968 | ||
1969 | { | |
1970 | rxq->size = pp->rx_ring_size; | |
1971 | ||
1972 | /* Allocate memory for RX descriptors */ | |
1973 | rxq->descs = dma_alloc_coherent(pp->dev->dev.parent, | |
1974 | rxq->size * MVNETA_DESC_ALIGNED_SIZE, | |
1975 | &rxq->descs_phys, GFP_KERNEL); | |
d0320f75 | 1976 | if (rxq->descs == NULL) |
c5aff182 | 1977 | return -ENOMEM; |
c5aff182 TP |
1978 | |
1979 | BUG_ON(rxq->descs != | |
1980 | PTR_ALIGN(rxq->descs, MVNETA_CPU_D_CACHE_LINE_SIZE)); | |
1981 | ||
1982 | rxq->last_desc = rxq->size - 1; | |
1983 | ||
1984 | /* Set Rx descriptors queue starting address */ | |
1985 | mvreg_write(pp, MVNETA_RXQ_BASE_ADDR_REG(rxq->id), rxq->descs_phys); | |
1986 | mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), rxq->size); | |
1987 | ||
1988 | /* Set Offset */ | |
1989 | mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD); | |
1990 | ||
1991 | /* Set coalescing pkts and time */ | |
1992 | mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal); | |
1993 | mvneta_rx_time_coal_set(pp, rxq, rxq->time_coal); | |
1994 | ||
1995 | /* Fill RXQ with buffers from RX pool */ | |
1996 | mvneta_rxq_buf_size_set(pp, rxq, MVNETA_RX_BUF_SIZE(pp->pkt_size)); | |
1997 | mvneta_rxq_bm_disable(pp, rxq); | |
1998 | mvneta_rxq_fill(pp, rxq, rxq->size); | |
1999 | ||
2000 | return 0; | |
2001 | } | |
2002 | ||
2003 | /* Cleanup Rx queue */ | |
2004 | static void mvneta_rxq_deinit(struct mvneta_port *pp, | |
2005 | struct mvneta_rx_queue *rxq) | |
2006 | { | |
2007 | mvneta_rxq_drop_pkts(pp, rxq); | |
2008 | ||
2009 | if (rxq->descs) | |
2010 | dma_free_coherent(pp->dev->dev.parent, | |
2011 | rxq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2012 | rxq->descs, | |
2013 | rxq->descs_phys); | |
2014 | ||
2015 | rxq->descs = NULL; | |
2016 | rxq->last_desc = 0; | |
2017 | rxq->next_desc_to_proc = 0; | |
2018 | rxq->descs_phys = 0; | |
2019 | } | |
2020 | ||
2021 | /* Create and initialize a tx queue */ | |
2022 | static int mvneta_txq_init(struct mvneta_port *pp, | |
2023 | struct mvneta_tx_queue *txq) | |
2024 | { | |
2025 | txq->size = pp->tx_ring_size; | |
2026 | ||
2027 | /* Allocate memory for TX descriptors */ | |
2028 | txq->descs = dma_alloc_coherent(pp->dev->dev.parent, | |
2029 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2030 | &txq->descs_phys, GFP_KERNEL); | |
d0320f75 | 2031 | if (txq->descs == NULL) |
c5aff182 | 2032 | return -ENOMEM; |
c5aff182 TP |
2033 | |
2034 | /* Make sure descriptor address is cache line size aligned */ | |
2035 | BUG_ON(txq->descs != | |
2036 | PTR_ALIGN(txq->descs, MVNETA_CPU_D_CACHE_LINE_SIZE)); | |
2037 | ||
2038 | txq->last_desc = txq->size - 1; | |
2039 | ||
2040 | /* Set maximum bandwidth for enabled TXQs */ | |
2041 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(txq->id), 0x03ffffff); | |
2042 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(txq->id), 0x3fffffff); | |
2043 | ||
2044 | /* Set Tx descriptors queue starting address */ | |
2045 | mvreg_write(pp, MVNETA_TXQ_BASE_ADDR_REG(txq->id), txq->descs_phys); | |
2046 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), txq->size); | |
2047 | ||
2048 | txq->tx_skb = kmalloc(txq->size * sizeof(*txq->tx_skb), GFP_KERNEL); | |
2049 | if (txq->tx_skb == NULL) { | |
2050 | dma_free_coherent(pp->dev->dev.parent, | |
2051 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2052 | txq->descs, txq->descs_phys); | |
2053 | return -ENOMEM; | |
2054 | } | |
2055 | mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal); | |
2056 | ||
2057 | return 0; | |
2058 | } | |
2059 | ||
2060 | /* Free allocated resources when mvneta_txq_init() fails to allocate memory*/ | |
2061 | static void mvneta_txq_deinit(struct mvneta_port *pp, | |
2062 | struct mvneta_tx_queue *txq) | |
2063 | { | |
2064 | kfree(txq->tx_skb); | |
2065 | ||
2066 | if (txq->descs) | |
2067 | dma_free_coherent(pp->dev->dev.parent, | |
2068 | txq->size * MVNETA_DESC_ALIGNED_SIZE, | |
2069 | txq->descs, txq->descs_phys); | |
2070 | ||
2071 | txq->descs = NULL; | |
2072 | txq->last_desc = 0; | |
2073 | txq->next_desc_to_proc = 0; | |
2074 | txq->descs_phys = 0; | |
2075 | ||
2076 | /* Set minimum bandwidth for disabled TXQs */ | |
2077 | mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(txq->id), 0); | |
2078 | mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(txq->id), 0); | |
2079 | ||
2080 | /* Set Tx descriptors queue starting address and size */ | |
2081 | mvreg_write(pp, MVNETA_TXQ_BASE_ADDR_REG(txq->id), 0); | |
2082 | mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), 0); | |
2083 | } | |
2084 | ||
2085 | /* Cleanup all Tx queues */ | |
2086 | static void mvneta_cleanup_txqs(struct mvneta_port *pp) | |
2087 | { | |
2088 | int queue; | |
2089 | ||
2090 | for (queue = 0; queue < txq_number; queue++) | |
2091 | mvneta_txq_deinit(pp, &pp->txqs[queue]); | |
2092 | } | |
2093 | ||
2094 | /* Cleanup all Rx queues */ | |
2095 | static void mvneta_cleanup_rxqs(struct mvneta_port *pp) | |
2096 | { | |
2097 | int queue; | |
2098 | ||
2099 | for (queue = 0; queue < rxq_number; queue++) | |
2100 | mvneta_rxq_deinit(pp, &pp->rxqs[queue]); | |
2101 | } | |
2102 | ||
2103 | ||
2104 | /* Init all Rx queues */ | |
2105 | static int mvneta_setup_rxqs(struct mvneta_port *pp) | |
2106 | { | |
2107 | int queue; | |
2108 | ||
2109 | for (queue = 0; queue < rxq_number; queue++) { | |
2110 | int err = mvneta_rxq_init(pp, &pp->rxqs[queue]); | |
2111 | if (err) { | |
2112 | netdev_err(pp->dev, "%s: can't create rxq=%d\n", | |
2113 | __func__, queue); | |
2114 | mvneta_cleanup_rxqs(pp); | |
2115 | return err; | |
2116 | } | |
2117 | } | |
2118 | ||
2119 | return 0; | |
2120 | } | |
2121 | ||
2122 | /* Init all tx queues */ | |
2123 | static int mvneta_setup_txqs(struct mvneta_port *pp) | |
2124 | { | |
2125 | int queue; | |
2126 | ||
2127 | for (queue = 0; queue < txq_number; queue++) { | |
2128 | int err = mvneta_txq_init(pp, &pp->txqs[queue]); | |
2129 | if (err) { | |
2130 | netdev_err(pp->dev, "%s: can't create txq=%d\n", | |
2131 | __func__, queue); | |
2132 | mvneta_cleanup_txqs(pp); | |
2133 | return err; | |
2134 | } | |
2135 | } | |
2136 | ||
2137 | return 0; | |
2138 | } | |
2139 | ||
2140 | static void mvneta_start_dev(struct mvneta_port *pp) | |
2141 | { | |
2142 | mvneta_max_rx_size_set(pp, pp->pkt_size); | |
2143 | mvneta_txq_max_tx_size_set(pp, pp->pkt_size); | |
2144 | ||
2145 | /* start the Rx/Tx activity */ | |
2146 | mvneta_port_enable(pp); | |
2147 | ||
2148 | /* Enable polling on the port */ | |
2149 | napi_enable(&pp->napi); | |
2150 | ||
2151 | /* Unmask interrupts */ | |
2152 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, | |
2153 | MVNETA_RX_INTR_MASK(rxq_number)); | |
2154 | ||
2155 | phy_start(pp->phy_dev); | |
2156 | netif_tx_start_all_queues(pp->dev); | |
2157 | } | |
2158 | ||
2159 | static void mvneta_stop_dev(struct mvneta_port *pp) | |
2160 | { | |
2161 | phy_stop(pp->phy_dev); | |
2162 | ||
2163 | napi_disable(&pp->napi); | |
2164 | ||
2165 | netif_carrier_off(pp->dev); | |
2166 | ||
2167 | mvneta_port_down(pp); | |
2168 | netif_tx_stop_all_queues(pp->dev); | |
2169 | ||
2170 | /* Stop the port activity */ | |
2171 | mvneta_port_disable(pp); | |
2172 | ||
2173 | /* Clear all ethernet port interrupts */ | |
2174 | mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0); | |
2175 | mvreg_write(pp, MVNETA_INTR_OLD_CAUSE, 0); | |
2176 | ||
2177 | /* Mask all ethernet port interrupts */ | |
2178 | mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0); | |
2179 | mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0); | |
2180 | mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0); | |
2181 | ||
2182 | mvneta_tx_reset(pp); | |
2183 | mvneta_rx_reset(pp); | |
2184 | } | |
2185 | ||
2186 | /* tx timeout callback - display a message and stop/start the network device */ | |
2187 | static void mvneta_tx_timeout(struct net_device *dev) | |
2188 | { | |
2189 | struct mvneta_port *pp = netdev_priv(dev); | |
2190 | ||
2191 | netdev_info(dev, "tx timeout\n"); | |
2192 | mvneta_stop_dev(pp); | |
2193 | mvneta_start_dev(pp); | |
2194 | } | |
2195 | ||
2196 | /* Return positive if MTU is valid */ | |
2197 | static int mvneta_check_mtu_valid(struct net_device *dev, int mtu) | |
2198 | { | |
2199 | if (mtu < 68) { | |
2200 | netdev_err(dev, "cannot change mtu to less than 68\n"); | |
2201 | return -EINVAL; | |
2202 | } | |
2203 | ||
6a20c175 | 2204 | /* 9676 == 9700 - 20 and rounding to 8 */ |
c5aff182 TP |
2205 | if (mtu > 9676) { |
2206 | netdev_info(dev, "Illegal MTU value %d, round to 9676\n", mtu); | |
2207 | mtu = 9676; | |
2208 | } | |
2209 | ||
2210 | if (!IS_ALIGNED(MVNETA_RX_PKT_SIZE(mtu), 8)) { | |
2211 | netdev_info(dev, "Illegal MTU value %d, rounding to %d\n", | |
2212 | mtu, ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8)); | |
2213 | mtu = ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8); | |
2214 | } | |
2215 | ||
2216 | return mtu; | |
2217 | } | |
2218 | ||
2219 | /* Change the device mtu */ | |
2220 | static int mvneta_change_mtu(struct net_device *dev, int mtu) | |
2221 | { | |
2222 | struct mvneta_port *pp = netdev_priv(dev); | |
2223 | int ret; | |
2224 | ||
2225 | mtu = mvneta_check_mtu_valid(dev, mtu); | |
2226 | if (mtu < 0) | |
2227 | return -EINVAL; | |
2228 | ||
2229 | dev->mtu = mtu; | |
2230 | ||
2231 | if (!netif_running(dev)) | |
2232 | return 0; | |
2233 | ||
6a20c175 | 2234 | /* The interface is running, so we have to force a |
c5aff182 TP |
2235 | * reallocation of the RXQs |
2236 | */ | |
2237 | mvneta_stop_dev(pp); | |
2238 | ||
2239 | mvneta_cleanup_txqs(pp); | |
2240 | mvneta_cleanup_rxqs(pp); | |
2241 | ||
2242 | pp->pkt_size = MVNETA_RX_PKT_SIZE(pp->dev->mtu); | |
2243 | ||
2244 | ret = mvneta_setup_rxqs(pp); | |
2245 | if (ret) { | |
2246 | netdev_err(pp->dev, "unable to setup rxqs after MTU change\n"); | |
2247 | return ret; | |
2248 | } | |
2249 | ||
2250 | mvneta_setup_txqs(pp); | |
2251 | ||
2252 | mvneta_start_dev(pp); | |
2253 | mvneta_port_up(pp); | |
2254 | ||
2255 | return 0; | |
2256 | } | |
2257 | ||
8cc3e439 TP |
2258 | /* Get mac address */ |
2259 | static void mvneta_get_mac_addr(struct mvneta_port *pp, unsigned char *addr) | |
2260 | { | |
2261 | u32 mac_addr_l, mac_addr_h; | |
2262 | ||
2263 | mac_addr_l = mvreg_read(pp, MVNETA_MAC_ADDR_LOW); | |
2264 | mac_addr_h = mvreg_read(pp, MVNETA_MAC_ADDR_HIGH); | |
2265 | addr[0] = (mac_addr_h >> 24) & 0xFF; | |
2266 | addr[1] = (mac_addr_h >> 16) & 0xFF; | |
2267 | addr[2] = (mac_addr_h >> 8) & 0xFF; | |
2268 | addr[3] = mac_addr_h & 0xFF; | |
2269 | addr[4] = (mac_addr_l >> 8) & 0xFF; | |
2270 | addr[5] = mac_addr_l & 0xFF; | |
2271 | } | |
2272 | ||
c5aff182 TP |
2273 | /* Handle setting mac address */ |
2274 | static int mvneta_set_mac_addr(struct net_device *dev, void *addr) | |
2275 | { | |
2276 | struct mvneta_port *pp = netdev_priv(dev); | |
2277 | u8 *mac = addr + 2; | |
2278 | int i; | |
2279 | ||
2280 | if (netif_running(dev)) | |
2281 | return -EBUSY; | |
2282 | ||
2283 | /* Remove previous address table entry */ | |
2284 | mvneta_mac_addr_set(pp, dev->dev_addr, -1); | |
2285 | ||
2286 | /* Set new addr in hw */ | |
2287 | mvneta_mac_addr_set(pp, mac, rxq_def); | |
2288 | ||
2289 | /* Set addr in the device */ | |
2290 | for (i = 0; i < ETH_ALEN; i++) | |
2291 | dev->dev_addr[i] = mac[i]; | |
2292 | ||
2293 | return 0; | |
2294 | } | |
2295 | ||
2296 | static void mvneta_adjust_link(struct net_device *ndev) | |
2297 | { | |
2298 | struct mvneta_port *pp = netdev_priv(ndev); | |
2299 | struct phy_device *phydev = pp->phy_dev; | |
2300 | int status_change = 0; | |
2301 | ||
2302 | if (phydev->link) { | |
2303 | if ((pp->speed != phydev->speed) || | |
2304 | (pp->duplex != phydev->duplex)) { | |
2305 | u32 val; | |
2306 | ||
2307 | val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
2308 | val &= ~(MVNETA_GMAC_CONFIG_MII_SPEED | | |
2309 | MVNETA_GMAC_CONFIG_GMII_SPEED | | |
2310 | MVNETA_GMAC_CONFIG_FULL_DUPLEX); | |
2311 | ||
2312 | if (phydev->duplex) | |
2313 | val |= MVNETA_GMAC_CONFIG_FULL_DUPLEX; | |
2314 | ||
2315 | if (phydev->speed == SPEED_1000) | |
2316 | val |= MVNETA_GMAC_CONFIG_GMII_SPEED; | |
2317 | else | |
2318 | val |= MVNETA_GMAC_CONFIG_MII_SPEED; | |
2319 | ||
2320 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
2321 | ||
2322 | pp->duplex = phydev->duplex; | |
2323 | pp->speed = phydev->speed; | |
2324 | } | |
2325 | } | |
2326 | ||
2327 | if (phydev->link != pp->link) { | |
2328 | if (!phydev->link) { | |
2329 | pp->duplex = -1; | |
2330 | pp->speed = 0; | |
2331 | } | |
2332 | ||
2333 | pp->link = phydev->link; | |
2334 | status_change = 1; | |
2335 | } | |
2336 | ||
2337 | if (status_change) { | |
2338 | if (phydev->link) { | |
2339 | u32 val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG); | |
2340 | val |= (MVNETA_GMAC_FORCE_LINK_PASS | | |
2341 | MVNETA_GMAC_FORCE_LINK_DOWN); | |
2342 | mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); | |
2343 | mvneta_port_up(pp); | |
2344 | netdev_info(pp->dev, "link up\n"); | |
2345 | } else { | |
2346 | mvneta_port_down(pp); | |
2347 | netdev_info(pp->dev, "link down\n"); | |
2348 | } | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | static int mvneta_mdio_probe(struct mvneta_port *pp) | |
2353 | { | |
2354 | struct phy_device *phy_dev; | |
2355 | ||
2356 | phy_dev = of_phy_connect(pp->dev, pp->phy_node, mvneta_adjust_link, 0, | |
2357 | pp->phy_interface); | |
2358 | if (!phy_dev) { | |
2359 | netdev_err(pp->dev, "could not find the PHY\n"); | |
2360 | return -ENODEV; | |
2361 | } | |
2362 | ||
2363 | phy_dev->supported &= PHY_GBIT_FEATURES; | |
2364 | phy_dev->advertising = phy_dev->supported; | |
2365 | ||
2366 | pp->phy_dev = phy_dev; | |
2367 | pp->link = 0; | |
2368 | pp->duplex = 0; | |
2369 | pp->speed = 0; | |
2370 | ||
2371 | return 0; | |
2372 | } | |
2373 | ||
2374 | static void mvneta_mdio_remove(struct mvneta_port *pp) | |
2375 | { | |
2376 | phy_disconnect(pp->phy_dev); | |
2377 | pp->phy_dev = NULL; | |
2378 | } | |
2379 | ||
2380 | static int mvneta_open(struct net_device *dev) | |
2381 | { | |
2382 | struct mvneta_port *pp = netdev_priv(dev); | |
2383 | int ret; | |
2384 | ||
2385 | mvneta_mac_addr_set(pp, dev->dev_addr, rxq_def); | |
2386 | ||
2387 | pp->pkt_size = MVNETA_RX_PKT_SIZE(pp->dev->mtu); | |
2388 | ||
2389 | ret = mvneta_setup_rxqs(pp); | |
2390 | if (ret) | |
2391 | return ret; | |
2392 | ||
2393 | ret = mvneta_setup_txqs(pp); | |
2394 | if (ret) | |
2395 | goto err_cleanup_rxqs; | |
2396 | ||
2397 | /* Connect to port interrupt line */ | |
2398 | ret = request_irq(pp->dev->irq, mvneta_isr, 0, | |
2399 | MVNETA_DRIVER_NAME, pp); | |
2400 | if (ret) { | |
2401 | netdev_err(pp->dev, "cannot request irq %d\n", pp->dev->irq); | |
2402 | goto err_cleanup_txqs; | |
2403 | } | |
2404 | ||
2405 | /* In default link is down */ | |
2406 | netif_carrier_off(pp->dev); | |
2407 | ||
2408 | ret = mvneta_mdio_probe(pp); | |
2409 | if (ret < 0) { | |
2410 | netdev_err(dev, "cannot probe MDIO bus\n"); | |
2411 | goto err_free_irq; | |
2412 | } | |
2413 | ||
2414 | mvneta_start_dev(pp); | |
2415 | ||
2416 | return 0; | |
2417 | ||
2418 | err_free_irq: | |
2419 | free_irq(pp->dev->irq, pp); | |
2420 | err_cleanup_txqs: | |
2421 | mvneta_cleanup_txqs(pp); | |
2422 | err_cleanup_rxqs: | |
2423 | mvneta_cleanup_rxqs(pp); | |
2424 | return ret; | |
2425 | } | |
2426 | ||
2427 | /* Stop the port, free port interrupt line */ | |
2428 | static int mvneta_stop(struct net_device *dev) | |
2429 | { | |
2430 | struct mvneta_port *pp = netdev_priv(dev); | |
2431 | ||
2432 | mvneta_stop_dev(pp); | |
2433 | mvneta_mdio_remove(pp); | |
2434 | free_irq(dev->irq, pp); | |
2435 | mvneta_cleanup_rxqs(pp); | |
2436 | mvneta_cleanup_txqs(pp); | |
2437 | del_timer(&pp->tx_done_timer); | |
2438 | clear_bit(MVNETA_F_TX_DONE_TIMER_BIT, &pp->flags); | |
2439 | ||
2440 | return 0; | |
2441 | } | |
2442 | ||
2443 | /* Ethtool methods */ | |
2444 | ||
2445 | /* Get settings (phy address, speed) for ethtools */ | |
2446 | int mvneta_ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
2447 | { | |
2448 | struct mvneta_port *pp = netdev_priv(dev); | |
2449 | ||
2450 | if (!pp->phy_dev) | |
2451 | return -ENODEV; | |
2452 | ||
2453 | return phy_ethtool_gset(pp->phy_dev, cmd); | |
2454 | } | |
2455 | ||
2456 | /* Set settings (phy address, speed) for ethtools */ | |
2457 | int mvneta_ethtool_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
2458 | { | |
2459 | struct mvneta_port *pp = netdev_priv(dev); | |
2460 | ||
2461 | if (!pp->phy_dev) | |
2462 | return -ENODEV; | |
2463 | ||
2464 | return phy_ethtool_sset(pp->phy_dev, cmd); | |
2465 | } | |
2466 | ||
2467 | /* Set interrupt coalescing for ethtools */ | |
2468 | static int mvneta_ethtool_set_coalesce(struct net_device *dev, | |
2469 | struct ethtool_coalesce *c) | |
2470 | { | |
2471 | struct mvneta_port *pp = netdev_priv(dev); | |
2472 | int queue; | |
2473 | ||
2474 | for (queue = 0; queue < rxq_number; queue++) { | |
2475 | struct mvneta_rx_queue *rxq = &pp->rxqs[queue]; | |
2476 | rxq->time_coal = c->rx_coalesce_usecs; | |
2477 | rxq->pkts_coal = c->rx_max_coalesced_frames; | |
2478 | mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal); | |
2479 | mvneta_rx_time_coal_set(pp, rxq, rxq->time_coal); | |
2480 | } | |
2481 | ||
2482 | for (queue = 0; queue < txq_number; queue++) { | |
2483 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
2484 | txq->done_pkts_coal = c->tx_max_coalesced_frames; | |
2485 | mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal); | |
2486 | } | |
2487 | ||
2488 | return 0; | |
2489 | } | |
2490 | ||
2491 | /* get coalescing for ethtools */ | |
2492 | static int mvneta_ethtool_get_coalesce(struct net_device *dev, | |
2493 | struct ethtool_coalesce *c) | |
2494 | { | |
2495 | struct mvneta_port *pp = netdev_priv(dev); | |
2496 | ||
2497 | c->rx_coalesce_usecs = pp->rxqs[0].time_coal; | |
2498 | c->rx_max_coalesced_frames = pp->rxqs[0].pkts_coal; | |
2499 | ||
2500 | c->tx_max_coalesced_frames = pp->txqs[0].done_pkts_coal; | |
2501 | return 0; | |
2502 | } | |
2503 | ||
2504 | ||
2505 | static void mvneta_ethtool_get_drvinfo(struct net_device *dev, | |
2506 | struct ethtool_drvinfo *drvinfo) | |
2507 | { | |
2508 | strlcpy(drvinfo->driver, MVNETA_DRIVER_NAME, | |
2509 | sizeof(drvinfo->driver)); | |
2510 | strlcpy(drvinfo->version, MVNETA_DRIVER_VERSION, | |
2511 | sizeof(drvinfo->version)); | |
2512 | strlcpy(drvinfo->bus_info, dev_name(&dev->dev), | |
2513 | sizeof(drvinfo->bus_info)); | |
2514 | } | |
2515 | ||
2516 | ||
2517 | static void mvneta_ethtool_get_ringparam(struct net_device *netdev, | |
2518 | struct ethtool_ringparam *ring) | |
2519 | { | |
2520 | struct mvneta_port *pp = netdev_priv(netdev); | |
2521 | ||
2522 | ring->rx_max_pending = MVNETA_MAX_RXD; | |
2523 | ring->tx_max_pending = MVNETA_MAX_TXD; | |
2524 | ring->rx_pending = pp->rx_ring_size; | |
2525 | ring->tx_pending = pp->tx_ring_size; | |
2526 | } | |
2527 | ||
2528 | static int mvneta_ethtool_set_ringparam(struct net_device *dev, | |
2529 | struct ethtool_ringparam *ring) | |
2530 | { | |
2531 | struct mvneta_port *pp = netdev_priv(dev); | |
2532 | ||
2533 | if ((ring->rx_pending == 0) || (ring->tx_pending == 0)) | |
2534 | return -EINVAL; | |
2535 | pp->rx_ring_size = ring->rx_pending < MVNETA_MAX_RXD ? | |
2536 | ring->rx_pending : MVNETA_MAX_RXD; | |
2537 | pp->tx_ring_size = ring->tx_pending < MVNETA_MAX_TXD ? | |
2538 | ring->tx_pending : MVNETA_MAX_TXD; | |
2539 | ||
2540 | if (netif_running(dev)) { | |
2541 | mvneta_stop(dev); | |
2542 | if (mvneta_open(dev)) { | |
2543 | netdev_err(dev, | |
2544 | "error on opening device after ring param change\n"); | |
2545 | return -ENOMEM; | |
2546 | } | |
2547 | } | |
2548 | ||
2549 | return 0; | |
2550 | } | |
2551 | ||
2552 | static const struct net_device_ops mvneta_netdev_ops = { | |
2553 | .ndo_open = mvneta_open, | |
2554 | .ndo_stop = mvneta_stop, | |
2555 | .ndo_start_xmit = mvneta_tx, | |
2556 | .ndo_set_rx_mode = mvneta_set_rx_mode, | |
2557 | .ndo_set_mac_address = mvneta_set_mac_addr, | |
2558 | .ndo_change_mtu = mvneta_change_mtu, | |
2559 | .ndo_tx_timeout = mvneta_tx_timeout, | |
2560 | .ndo_get_stats64 = mvneta_get_stats64, | |
2561 | }; | |
2562 | ||
2563 | const struct ethtool_ops mvneta_eth_tool_ops = { | |
2564 | .get_link = ethtool_op_get_link, | |
2565 | .get_settings = mvneta_ethtool_get_settings, | |
2566 | .set_settings = mvneta_ethtool_set_settings, | |
2567 | .set_coalesce = mvneta_ethtool_set_coalesce, | |
2568 | .get_coalesce = mvneta_ethtool_get_coalesce, | |
2569 | .get_drvinfo = mvneta_ethtool_get_drvinfo, | |
2570 | .get_ringparam = mvneta_ethtool_get_ringparam, | |
2571 | .set_ringparam = mvneta_ethtool_set_ringparam, | |
2572 | }; | |
2573 | ||
2574 | /* Initialize hw */ | |
03ce758e | 2575 | static int mvneta_init(struct mvneta_port *pp, int phy_addr) |
c5aff182 TP |
2576 | { |
2577 | int queue; | |
2578 | ||
2579 | /* Disable port */ | |
2580 | mvneta_port_disable(pp); | |
2581 | ||
2582 | /* Set port default values */ | |
2583 | mvneta_defaults_set(pp); | |
2584 | ||
2585 | pp->txqs = kzalloc(txq_number * sizeof(struct mvneta_tx_queue), | |
2586 | GFP_KERNEL); | |
2587 | if (!pp->txqs) | |
2588 | return -ENOMEM; | |
2589 | ||
2590 | /* Initialize TX descriptor rings */ | |
2591 | for (queue = 0; queue < txq_number; queue++) { | |
2592 | struct mvneta_tx_queue *txq = &pp->txqs[queue]; | |
2593 | txq->id = queue; | |
2594 | txq->size = pp->tx_ring_size; | |
2595 | txq->done_pkts_coal = MVNETA_TXDONE_COAL_PKTS; | |
2596 | } | |
2597 | ||
2598 | pp->rxqs = kzalloc(rxq_number * sizeof(struct mvneta_rx_queue), | |
2599 | GFP_KERNEL); | |
2600 | if (!pp->rxqs) { | |
2601 | kfree(pp->txqs); | |
2602 | return -ENOMEM; | |
2603 | } | |
2604 | ||
2605 | /* Create Rx descriptor rings */ | |
2606 | for (queue = 0; queue < rxq_number; queue++) { | |
2607 | struct mvneta_rx_queue *rxq = &pp->rxqs[queue]; | |
2608 | rxq->id = queue; | |
2609 | rxq->size = pp->rx_ring_size; | |
2610 | rxq->pkts_coal = MVNETA_RX_COAL_PKTS; | |
2611 | rxq->time_coal = MVNETA_RX_COAL_USEC; | |
2612 | } | |
2613 | ||
2614 | return 0; | |
2615 | } | |
2616 | ||
70eeaf98 | 2617 | static void mvneta_deinit(struct mvneta_port *pp) |
c5aff182 TP |
2618 | { |
2619 | kfree(pp->txqs); | |
2620 | kfree(pp->rxqs); | |
2621 | } | |
2622 | ||
2623 | /* platform glue : initialize decoding windows */ | |
03ce758e GK |
2624 | static void mvneta_conf_mbus_windows(struct mvneta_port *pp, |
2625 | const struct mbus_dram_target_info *dram) | |
c5aff182 TP |
2626 | { |
2627 | u32 win_enable; | |
2628 | u32 win_protect; | |
2629 | int i; | |
2630 | ||
2631 | for (i = 0; i < 6; i++) { | |
2632 | mvreg_write(pp, MVNETA_WIN_BASE(i), 0); | |
2633 | mvreg_write(pp, MVNETA_WIN_SIZE(i), 0); | |
2634 | ||
2635 | if (i < 4) | |
2636 | mvreg_write(pp, MVNETA_WIN_REMAP(i), 0); | |
2637 | } | |
2638 | ||
2639 | win_enable = 0x3f; | |
2640 | win_protect = 0; | |
2641 | ||
2642 | for (i = 0; i < dram->num_cs; i++) { | |
2643 | const struct mbus_dram_window *cs = dram->cs + i; | |
2644 | mvreg_write(pp, MVNETA_WIN_BASE(i), (cs->base & 0xffff0000) | | |
2645 | (cs->mbus_attr << 8) | dram->mbus_dram_target_id); | |
2646 | ||
2647 | mvreg_write(pp, MVNETA_WIN_SIZE(i), | |
2648 | (cs->size - 1) & 0xffff0000); | |
2649 | ||
2650 | win_enable &= ~(1 << i); | |
2651 | win_protect |= 3 << (2 * i); | |
2652 | } | |
2653 | ||
2654 | mvreg_write(pp, MVNETA_BASE_ADDR_ENABLE, win_enable); | |
2655 | } | |
2656 | ||
2657 | /* Power up the port */ | |
03ce758e | 2658 | static void mvneta_port_power_up(struct mvneta_port *pp, int phy_mode) |
c5aff182 TP |
2659 | { |
2660 | u32 val; | |
2661 | ||
2662 | /* MAC Cause register should be cleared */ | |
2663 | mvreg_write(pp, MVNETA_UNIT_INTR_CAUSE, 0); | |
2664 | ||
2665 | if (phy_mode == PHY_INTERFACE_MODE_SGMII) | |
2666 | mvneta_port_sgmii_config(pp); | |
2667 | ||
2668 | mvneta_gmac_rgmii_set(pp, 1); | |
2669 | ||
2670 | /* Cancel Port Reset */ | |
2671 | val = mvreg_read(pp, MVNETA_GMAC_CTRL_2); | |
2672 | val &= ~MVNETA_GMAC2_PORT_RESET; | |
2673 | mvreg_write(pp, MVNETA_GMAC_CTRL_2, val); | |
2674 | ||
2675 | while ((mvreg_read(pp, MVNETA_GMAC_CTRL_2) & | |
2676 | MVNETA_GMAC2_PORT_RESET) != 0) | |
2677 | continue; | |
2678 | } | |
2679 | ||
2680 | /* Device initialization routine */ | |
03ce758e | 2681 | static int mvneta_probe(struct platform_device *pdev) |
c5aff182 TP |
2682 | { |
2683 | const struct mbus_dram_target_info *dram_target_info; | |
2684 | struct device_node *dn = pdev->dev.of_node; | |
2685 | struct device_node *phy_node; | |
189dd626 | 2686 | u32 phy_addr; |
c5aff182 TP |
2687 | struct mvneta_port *pp; |
2688 | struct net_device *dev; | |
8cc3e439 TP |
2689 | const char *dt_mac_addr; |
2690 | char hw_mac_addr[ETH_ALEN]; | |
2691 | const char *mac_from; | |
c5aff182 TP |
2692 | int phy_mode; |
2693 | int err; | |
2694 | ||
6a20c175 | 2695 | /* Our multiqueue support is not complete, so for now, only |
c5aff182 TP |
2696 | * allow the usage of the first RX queue |
2697 | */ | |
2698 | if (rxq_def != 0) { | |
2699 | dev_err(&pdev->dev, "Invalid rxq_def argument: %d\n", rxq_def); | |
2700 | return -EINVAL; | |
2701 | } | |
2702 | ||
ee40a116 | 2703 | dev = alloc_etherdev_mqs(sizeof(struct mvneta_port), txq_number, rxq_number); |
c5aff182 TP |
2704 | if (!dev) |
2705 | return -ENOMEM; | |
2706 | ||
2707 | dev->irq = irq_of_parse_and_map(dn, 0); | |
2708 | if (dev->irq == 0) { | |
2709 | err = -EINVAL; | |
2710 | goto err_free_netdev; | |
2711 | } | |
2712 | ||
2713 | phy_node = of_parse_phandle(dn, "phy", 0); | |
2714 | if (!phy_node) { | |
2715 | dev_err(&pdev->dev, "no associated PHY\n"); | |
2716 | err = -ENODEV; | |
2717 | goto err_free_irq; | |
2718 | } | |
2719 | ||
2720 | phy_mode = of_get_phy_mode(dn); | |
2721 | if (phy_mode < 0) { | |
2722 | dev_err(&pdev->dev, "incorrect phy-mode\n"); | |
2723 | err = -EINVAL; | |
2724 | goto err_free_irq; | |
2725 | } | |
2726 | ||
c5aff182 TP |
2727 | dev->tx_queue_len = MVNETA_MAX_TXD; |
2728 | dev->watchdog_timeo = 5 * HZ; | |
2729 | dev->netdev_ops = &mvneta_netdev_ops; | |
2730 | ||
2731 | SET_ETHTOOL_OPS(dev, &mvneta_eth_tool_ops); | |
2732 | ||
2733 | pp = netdev_priv(dev); | |
2734 | ||
c5aff182 | 2735 | pp->weight = MVNETA_RX_POLL_WEIGHT; |
c5aff182 TP |
2736 | pp->phy_node = phy_node; |
2737 | pp->phy_interface = phy_mode; | |
2738 | ||
189dd626 TP |
2739 | pp->clk = devm_clk_get(&pdev->dev, NULL); |
2740 | if (IS_ERR(pp->clk)) { | |
2741 | err = PTR_ERR(pp->clk); | |
5445eaf3 | 2742 | goto err_free_irq; |
189dd626 TP |
2743 | } |
2744 | ||
2745 | clk_prepare_enable(pp->clk); | |
2746 | ||
5445eaf3 APR |
2747 | pp->base = of_iomap(dn, 0); |
2748 | if (pp->base == NULL) { | |
2749 | err = -ENOMEM; | |
2750 | goto err_clk; | |
2751 | } | |
2752 | ||
8cc3e439 TP |
2753 | dt_mac_addr = of_get_mac_address(dn); |
2754 | if (dt_mac_addr && is_valid_ether_addr(dt_mac_addr)) { | |
2755 | mac_from = "device tree"; | |
2756 | memcpy(dev->dev_addr, dt_mac_addr, ETH_ALEN); | |
2757 | } else { | |
2758 | mvneta_get_mac_addr(pp, hw_mac_addr); | |
2759 | if (is_valid_ether_addr(hw_mac_addr)) { | |
2760 | mac_from = "hardware"; | |
2761 | memcpy(dev->dev_addr, hw_mac_addr, ETH_ALEN); | |
2762 | } else { | |
2763 | mac_from = "random"; | |
2764 | eth_hw_addr_random(dev); | |
2765 | } | |
2766 | } | |
2767 | ||
c5aff182 | 2768 | pp->tx_done_timer.data = (unsigned long)dev; |
aded0955 APR |
2769 | pp->tx_done_timer.function = mvneta_tx_done_timer_callback; |
2770 | init_timer(&pp->tx_done_timer); | |
2771 | clear_bit(MVNETA_F_TX_DONE_TIMER_BIT, &pp->flags); | |
c5aff182 TP |
2772 | |
2773 | pp->tx_ring_size = MVNETA_MAX_TXD; | |
2774 | pp->rx_ring_size = MVNETA_MAX_RXD; | |
2775 | ||
2776 | pp->dev = dev; | |
2777 | SET_NETDEV_DEV(dev, &pdev->dev); | |
2778 | ||
2779 | err = mvneta_init(pp, phy_addr); | |
2780 | if (err < 0) { | |
2781 | dev_err(&pdev->dev, "can't init eth hal\n"); | |
5445eaf3 | 2782 | goto err_unmap; |
c5aff182 TP |
2783 | } |
2784 | mvneta_port_power_up(pp, phy_mode); | |
2785 | ||
2786 | dram_target_info = mv_mbus_dram_info(); | |
2787 | if (dram_target_info) | |
2788 | mvneta_conf_mbus_windows(pp, dram_target_info); | |
2789 | ||
2790 | netif_napi_add(dev, &pp->napi, mvneta_poll, pp->weight); | |
2791 | ||
b50b72de | 2792 | dev->features = NETIF_F_SG | NETIF_F_IP_CSUM; |
2793 | dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM; | |
2794 | dev->vlan_features |= NETIF_F_SG | NETIF_F_IP_CSUM; | |
2795 | dev->priv_flags |= IFF_UNICAST_FLT; | |
2796 | ||
c5aff182 TP |
2797 | err = register_netdev(dev); |
2798 | if (err < 0) { | |
2799 | dev_err(&pdev->dev, "failed to register\n"); | |
2800 | goto err_deinit; | |
2801 | } | |
2802 | ||
8cc3e439 TP |
2803 | netdev_info(dev, "Using %s mac address %pM\n", mac_from, |
2804 | dev->dev_addr); | |
c5aff182 TP |
2805 | |
2806 | platform_set_drvdata(pdev, pp->dev); | |
2807 | ||
2808 | return 0; | |
2809 | ||
2810 | err_deinit: | |
2811 | mvneta_deinit(pp); | |
2812 | err_unmap: | |
2813 | iounmap(pp->base); | |
5445eaf3 APR |
2814 | err_clk: |
2815 | clk_disable_unprepare(pp->clk); | |
c5aff182 TP |
2816 | err_free_irq: |
2817 | irq_dispose_mapping(dev->irq); | |
2818 | err_free_netdev: | |
2819 | free_netdev(dev); | |
2820 | return err; | |
2821 | } | |
2822 | ||
2823 | /* Device removal routine */ | |
03ce758e | 2824 | static int mvneta_remove(struct platform_device *pdev) |
c5aff182 TP |
2825 | { |
2826 | struct net_device *dev = platform_get_drvdata(pdev); | |
2827 | struct mvneta_port *pp = netdev_priv(dev); | |
2828 | ||
2829 | unregister_netdev(dev); | |
2830 | mvneta_deinit(pp); | |
189dd626 | 2831 | clk_disable_unprepare(pp->clk); |
c5aff182 TP |
2832 | iounmap(pp->base); |
2833 | irq_dispose_mapping(dev->irq); | |
2834 | free_netdev(dev); | |
2835 | ||
c5aff182 TP |
2836 | return 0; |
2837 | } | |
2838 | ||
2839 | static const struct of_device_id mvneta_match[] = { | |
2840 | { .compatible = "marvell,armada-370-neta" }, | |
2841 | { } | |
2842 | }; | |
2843 | MODULE_DEVICE_TABLE(of, mvneta_match); | |
2844 | ||
2845 | static struct platform_driver mvneta_driver = { | |
2846 | .probe = mvneta_probe, | |
03ce758e | 2847 | .remove = mvneta_remove, |
c5aff182 TP |
2848 | .driver = { |
2849 | .name = MVNETA_DRIVER_NAME, | |
2850 | .of_match_table = mvneta_match, | |
2851 | }, | |
2852 | }; | |
2853 | ||
2854 | module_platform_driver(mvneta_driver); | |
2855 | ||
2856 | MODULE_DESCRIPTION("Marvell NETA Ethernet Driver - www.marvell.com"); | |
2857 | MODULE_AUTHOR("Rami Rosen <rosenr@marvell.com>, Thomas Petazzoni <thomas.petazzoni@free-electrons.com>"); | |
2858 | MODULE_LICENSE("GPL"); | |
2859 | ||
2860 | module_param(rxq_number, int, S_IRUGO); | |
2861 | module_param(txq_number, int, S_IRUGO); | |
2862 | ||
2863 | module_param(rxq_def, int, S_IRUGO); |