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8a3b7a25 | 1 | /* |
2 | * Xilinx Axi Ethernet device driver | |
3 | * | |
4 | * Copyright (c) 2008 Nissin Systems Co., Ltd., Yoshio Kashiwagi | |
5 | * Copyright (c) 2005-2008 DLA Systems, David H. Lynch Jr. <dhlii@dlasys.net> | |
6 | * Copyright (c) 2008-2009 Secret Lab Technologies Ltd. | |
59a54f30 MS |
7 | * Copyright (c) 2010 - 2011 Michal Simek <monstr@monstr.eu> |
8 | * Copyright (c) 2010 - 2011 PetaLogix | |
9 | * Copyright (c) 2010 - 2012 Xilinx, Inc. All rights reserved. | |
8a3b7a25 | 10 | * |
11 | * This is a driver for the Xilinx Axi Ethernet which is used in the Virtex6 | |
12 | * and Spartan6. | |
13 | * | |
14 | * TODO: | |
15 | * - Add Axi Fifo support. | |
16 | * - Factor out Axi DMA code into separate driver. | |
17 | * - Test and fix basic multicast filtering. | |
18 | * - Add support for extended multicast filtering. | |
19 | * - Test basic VLAN support. | |
20 | * - Add support for extended VLAN support. | |
21 | */ | |
22 | ||
23 | #include <linux/delay.h> | |
24 | #include <linux/etherdevice.h> | |
8a3b7a25 | 25 | #include <linux/module.h> |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/of_mdio.h> | |
28 | #include <linux/of_platform.h> | |
9d5e8ec6 | 29 | #include <linux/of_irq.h> |
8a3b7a25 | 30 | #include <linux/of_address.h> |
31 | #include <linux/skbuff.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/phy.h> | |
34 | #include <linux/mii.h> | |
35 | #include <linux/ethtool.h> | |
36 | ||
37 | #include "xilinx_axienet.h" | |
38 | ||
39 | /* Descriptors defines for Tx and Rx DMA - 2^n for the best performance */ | |
40 | #define TX_BD_NUM 64 | |
41 | #define RX_BD_NUM 128 | |
42 | ||
43 | /* Must be shorter than length of ethtool_drvinfo.driver field to fit */ | |
44 | #define DRIVER_NAME "xaxienet" | |
45 | #define DRIVER_DESCRIPTION "Xilinx Axi Ethernet driver" | |
46 | #define DRIVER_VERSION "1.00a" | |
47 | ||
48 | #define AXIENET_REGS_N 32 | |
49 | ||
50 | /* Match table for of_platform binding */ | |
74847f23 | 51 | static const struct of_device_id axienet_of_match[] = { |
8a3b7a25 | 52 | { .compatible = "xlnx,axi-ethernet-1.00.a", }, |
53 | { .compatible = "xlnx,axi-ethernet-1.01.a", }, | |
54 | { .compatible = "xlnx,axi-ethernet-2.01.a", }, | |
55 | {}, | |
56 | }; | |
57 | ||
58 | MODULE_DEVICE_TABLE(of, axienet_of_match); | |
59 | ||
60 | /* Option table for setting up Axi Ethernet hardware options */ | |
61 | static struct axienet_option axienet_options[] = { | |
62 | /* Turn on jumbo packet support for both Rx and Tx */ | |
63 | { | |
64 | .opt = XAE_OPTION_JUMBO, | |
65 | .reg = XAE_TC_OFFSET, | |
66 | .m_or = XAE_TC_JUM_MASK, | |
67 | }, { | |
68 | .opt = XAE_OPTION_JUMBO, | |
69 | .reg = XAE_RCW1_OFFSET, | |
70 | .m_or = XAE_RCW1_JUM_MASK, | |
71 | }, { /* Turn on VLAN packet support for both Rx and Tx */ | |
72 | .opt = XAE_OPTION_VLAN, | |
73 | .reg = XAE_TC_OFFSET, | |
74 | .m_or = XAE_TC_VLAN_MASK, | |
75 | }, { | |
76 | .opt = XAE_OPTION_VLAN, | |
77 | .reg = XAE_RCW1_OFFSET, | |
78 | .m_or = XAE_RCW1_VLAN_MASK, | |
79 | }, { /* Turn on FCS stripping on receive packets */ | |
80 | .opt = XAE_OPTION_FCS_STRIP, | |
81 | .reg = XAE_RCW1_OFFSET, | |
82 | .m_or = XAE_RCW1_FCS_MASK, | |
83 | }, { /* Turn on FCS insertion on transmit packets */ | |
84 | .opt = XAE_OPTION_FCS_INSERT, | |
85 | .reg = XAE_TC_OFFSET, | |
86 | .m_or = XAE_TC_FCS_MASK, | |
87 | }, { /* Turn off length/type field checking on receive packets */ | |
88 | .opt = XAE_OPTION_LENTYPE_ERR, | |
89 | .reg = XAE_RCW1_OFFSET, | |
90 | .m_or = XAE_RCW1_LT_DIS_MASK, | |
91 | }, { /* Turn on Rx flow control */ | |
92 | .opt = XAE_OPTION_FLOW_CONTROL, | |
93 | .reg = XAE_FCC_OFFSET, | |
94 | .m_or = XAE_FCC_FCRX_MASK, | |
95 | }, { /* Turn on Tx flow control */ | |
96 | .opt = XAE_OPTION_FLOW_CONTROL, | |
97 | .reg = XAE_FCC_OFFSET, | |
98 | .m_or = XAE_FCC_FCTX_MASK, | |
99 | }, { /* Turn on promiscuous frame filtering */ | |
100 | .opt = XAE_OPTION_PROMISC, | |
101 | .reg = XAE_FMI_OFFSET, | |
102 | .m_or = XAE_FMI_PM_MASK, | |
103 | }, { /* Enable transmitter */ | |
104 | .opt = XAE_OPTION_TXEN, | |
105 | .reg = XAE_TC_OFFSET, | |
106 | .m_or = XAE_TC_TX_MASK, | |
107 | }, { /* Enable receiver */ | |
108 | .opt = XAE_OPTION_RXEN, | |
109 | .reg = XAE_RCW1_OFFSET, | |
110 | .m_or = XAE_RCW1_RX_MASK, | |
111 | }, | |
112 | {} | |
113 | }; | |
114 | ||
115 | /** | |
116 | * axienet_dma_in32 - Memory mapped Axi DMA register read | |
117 | * @lp: Pointer to axienet local structure | |
118 | * @reg: Address offset from the base address of the Axi DMA core | |
119 | * | |
b0d081c5 | 120 | * Return: The contents of the Axi DMA register |
8a3b7a25 | 121 | * |
122 | * This function returns the contents of the corresponding Axi DMA register. | |
123 | */ | |
124 | static inline u32 axienet_dma_in32(struct axienet_local *lp, off_t reg) | |
125 | { | |
126 | return in_be32(lp->dma_regs + reg); | |
127 | } | |
128 | ||
129 | /** | |
130 | * axienet_dma_out32 - Memory mapped Axi DMA register write. | |
131 | * @lp: Pointer to axienet local structure | |
132 | * @reg: Address offset from the base address of the Axi DMA core | |
133 | * @value: Value to be written into the Axi DMA register | |
134 | * | |
135 | * This function writes the desired value into the corresponding Axi DMA | |
136 | * register. | |
137 | */ | |
138 | static inline void axienet_dma_out32(struct axienet_local *lp, | |
139 | off_t reg, u32 value) | |
140 | { | |
141 | out_be32((lp->dma_regs + reg), value); | |
142 | } | |
143 | ||
144 | /** | |
145 | * axienet_dma_bd_release - Release buffer descriptor rings | |
146 | * @ndev: Pointer to the net_device structure | |
147 | * | |
148 | * This function is used to release the descriptors allocated in | |
149 | * axienet_dma_bd_init. axienet_dma_bd_release is called when Axi Ethernet | |
150 | * driver stop api is called. | |
151 | */ | |
152 | static void axienet_dma_bd_release(struct net_device *ndev) | |
153 | { | |
154 | int i; | |
155 | struct axienet_local *lp = netdev_priv(ndev); | |
156 | ||
157 | for (i = 0; i < RX_BD_NUM; i++) { | |
158 | dma_unmap_single(ndev->dev.parent, lp->rx_bd_v[i].phys, | |
159 | lp->max_frm_size, DMA_FROM_DEVICE); | |
160 | dev_kfree_skb((struct sk_buff *) | |
161 | (lp->rx_bd_v[i].sw_id_offset)); | |
162 | } | |
163 | ||
164 | if (lp->rx_bd_v) { | |
165 | dma_free_coherent(ndev->dev.parent, | |
166 | sizeof(*lp->rx_bd_v) * RX_BD_NUM, | |
167 | lp->rx_bd_v, | |
168 | lp->rx_bd_p); | |
169 | } | |
170 | if (lp->tx_bd_v) { | |
171 | dma_free_coherent(ndev->dev.parent, | |
172 | sizeof(*lp->tx_bd_v) * TX_BD_NUM, | |
173 | lp->tx_bd_v, | |
174 | lp->tx_bd_p); | |
175 | } | |
176 | } | |
177 | ||
178 | /** | |
179 | * axienet_dma_bd_init - Setup buffer descriptor rings for Axi DMA | |
180 | * @ndev: Pointer to the net_device structure | |
181 | * | |
b0d081c5 | 182 | * Return: 0, on success -ENOMEM, on failure |
8a3b7a25 | 183 | * |
184 | * This function is called to initialize the Rx and Tx DMA descriptor | |
185 | * rings. This initializes the descriptors with required default values | |
186 | * and is called when Axi Ethernet driver reset is called. | |
187 | */ | |
188 | static int axienet_dma_bd_init(struct net_device *ndev) | |
189 | { | |
190 | u32 cr; | |
191 | int i; | |
192 | struct sk_buff *skb; | |
193 | struct axienet_local *lp = netdev_priv(ndev); | |
194 | ||
195 | /* Reset the indexes which are used for accessing the BDs */ | |
196 | lp->tx_bd_ci = 0; | |
197 | lp->tx_bd_tail = 0; | |
198 | lp->rx_bd_ci = 0; | |
199 | ||
850a7503 | 200 | /* Allocate the Tx and Rx buffer descriptors. */ |
ede23fa8 JP |
201 | lp->tx_bd_v = dma_zalloc_coherent(ndev->dev.parent, |
202 | sizeof(*lp->tx_bd_v) * TX_BD_NUM, | |
203 | &lp->tx_bd_p, GFP_KERNEL); | |
d0320f75 | 204 | if (!lp->tx_bd_v) |
8a3b7a25 | 205 | goto out; |
8a3b7a25 | 206 | |
ede23fa8 JP |
207 | lp->rx_bd_v = dma_zalloc_coherent(ndev->dev.parent, |
208 | sizeof(*lp->rx_bd_v) * RX_BD_NUM, | |
209 | &lp->rx_bd_p, GFP_KERNEL); | |
d0320f75 | 210 | if (!lp->rx_bd_v) |
8a3b7a25 | 211 | goto out; |
8a3b7a25 | 212 | |
8a3b7a25 | 213 | for (i = 0; i < TX_BD_NUM; i++) { |
214 | lp->tx_bd_v[i].next = lp->tx_bd_p + | |
215 | sizeof(*lp->tx_bd_v) * | |
216 | ((i + 1) % TX_BD_NUM); | |
217 | } | |
218 | ||
8a3b7a25 | 219 | for (i = 0; i < RX_BD_NUM; i++) { |
220 | lp->rx_bd_v[i].next = lp->rx_bd_p + | |
221 | sizeof(*lp->rx_bd_v) * | |
222 | ((i + 1) % RX_BD_NUM); | |
223 | ||
224 | skb = netdev_alloc_skb_ip_align(ndev, lp->max_frm_size); | |
720a43ef | 225 | if (!skb) |
8a3b7a25 | 226 | goto out; |
8a3b7a25 | 227 | |
228 | lp->rx_bd_v[i].sw_id_offset = (u32) skb; | |
229 | lp->rx_bd_v[i].phys = dma_map_single(ndev->dev.parent, | |
230 | skb->data, | |
231 | lp->max_frm_size, | |
232 | DMA_FROM_DEVICE); | |
233 | lp->rx_bd_v[i].cntrl = lp->max_frm_size; | |
234 | } | |
235 | ||
236 | /* Start updating the Rx channel control register */ | |
237 | cr = axienet_dma_in32(lp, XAXIDMA_RX_CR_OFFSET); | |
238 | /* Update the interrupt coalesce count */ | |
239 | cr = ((cr & ~XAXIDMA_COALESCE_MASK) | | |
240 | ((lp->coalesce_count_rx) << XAXIDMA_COALESCE_SHIFT)); | |
241 | /* Update the delay timer count */ | |
242 | cr = ((cr & ~XAXIDMA_DELAY_MASK) | | |
243 | (XAXIDMA_DFT_RX_WAITBOUND << XAXIDMA_DELAY_SHIFT)); | |
244 | /* Enable coalesce, delay timer and error interrupts */ | |
245 | cr |= XAXIDMA_IRQ_ALL_MASK; | |
246 | /* Write to the Rx channel control register */ | |
247 | axienet_dma_out32(lp, XAXIDMA_RX_CR_OFFSET, cr); | |
248 | ||
249 | /* Start updating the Tx channel control register */ | |
250 | cr = axienet_dma_in32(lp, XAXIDMA_TX_CR_OFFSET); | |
251 | /* Update the interrupt coalesce count */ | |
252 | cr = (((cr & ~XAXIDMA_COALESCE_MASK)) | | |
253 | ((lp->coalesce_count_tx) << XAXIDMA_COALESCE_SHIFT)); | |
254 | /* Update the delay timer count */ | |
255 | cr = (((cr & ~XAXIDMA_DELAY_MASK)) | | |
256 | (XAXIDMA_DFT_TX_WAITBOUND << XAXIDMA_DELAY_SHIFT)); | |
257 | /* Enable coalesce, delay timer and error interrupts */ | |
258 | cr |= XAXIDMA_IRQ_ALL_MASK; | |
259 | /* Write to the Tx channel control register */ | |
260 | axienet_dma_out32(lp, XAXIDMA_TX_CR_OFFSET, cr); | |
261 | ||
262 | /* Populate the tail pointer and bring the Rx Axi DMA engine out of | |
850a7503 MS |
263 | * halted state. This will make the Rx side ready for reception. |
264 | */ | |
8a3b7a25 | 265 | axienet_dma_out32(lp, XAXIDMA_RX_CDESC_OFFSET, lp->rx_bd_p); |
266 | cr = axienet_dma_in32(lp, XAXIDMA_RX_CR_OFFSET); | |
267 | axienet_dma_out32(lp, XAXIDMA_RX_CR_OFFSET, | |
268 | cr | XAXIDMA_CR_RUNSTOP_MASK); | |
269 | axienet_dma_out32(lp, XAXIDMA_RX_TDESC_OFFSET, lp->rx_bd_p + | |
270 | (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1))); | |
271 | ||
272 | /* Write to the RS (Run-stop) bit in the Tx channel control register. | |
273 | * Tx channel is now ready to run. But only after we write to the | |
850a7503 MS |
274 | * tail pointer register that the Tx channel will start transmitting. |
275 | */ | |
8a3b7a25 | 276 | axienet_dma_out32(lp, XAXIDMA_TX_CDESC_OFFSET, lp->tx_bd_p); |
277 | cr = axienet_dma_in32(lp, XAXIDMA_TX_CR_OFFSET); | |
278 | axienet_dma_out32(lp, XAXIDMA_TX_CR_OFFSET, | |
279 | cr | XAXIDMA_CR_RUNSTOP_MASK); | |
280 | ||
281 | return 0; | |
282 | out: | |
283 | axienet_dma_bd_release(ndev); | |
284 | return -ENOMEM; | |
285 | } | |
286 | ||
287 | /** | |
288 | * axienet_set_mac_address - Write the MAC address | |
289 | * @ndev: Pointer to the net_device structure | |
290 | * @address: 6 byte Address to be written as MAC address | |
291 | * | |
292 | * This function is called to initialize the MAC address of the Axi Ethernet | |
293 | * core. It writes to the UAW0 and UAW1 registers of the core. | |
294 | */ | |
295 | static void axienet_set_mac_address(struct net_device *ndev, void *address) | |
296 | { | |
297 | struct axienet_local *lp = netdev_priv(ndev); | |
298 | ||
299 | if (address) | |
300 | memcpy(ndev->dev_addr, address, ETH_ALEN); | |
301 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
7efd26d0 | 302 | eth_random_addr(ndev->dev_addr); |
8a3b7a25 | 303 | |
304 | /* Set up unicast MAC address filter set its mac address */ | |
305 | axienet_iow(lp, XAE_UAW0_OFFSET, | |
306 | (ndev->dev_addr[0]) | | |
307 | (ndev->dev_addr[1] << 8) | | |
308 | (ndev->dev_addr[2] << 16) | | |
309 | (ndev->dev_addr[3] << 24)); | |
310 | axienet_iow(lp, XAE_UAW1_OFFSET, | |
311 | (((axienet_ior(lp, XAE_UAW1_OFFSET)) & | |
312 | ~XAE_UAW1_UNICASTADDR_MASK) | | |
313 | (ndev->dev_addr[4] | | |
314 | (ndev->dev_addr[5] << 8)))); | |
315 | } | |
316 | ||
317 | /** | |
318 | * netdev_set_mac_address - Write the MAC address (from outside the driver) | |
319 | * @ndev: Pointer to the net_device structure | |
320 | * @p: 6 byte Address to be written as MAC address | |
321 | * | |
b0d081c5 | 322 | * Return: 0 for all conditions. Presently, there is no failure case. |
8a3b7a25 | 323 | * |
324 | * This function is called to initialize the MAC address of the Axi Ethernet | |
325 | * core. It calls the core specific axienet_set_mac_address. This is the | |
326 | * function that goes into net_device_ops structure entry ndo_set_mac_address. | |
327 | */ | |
328 | static int netdev_set_mac_address(struct net_device *ndev, void *p) | |
329 | { | |
330 | struct sockaddr *addr = p; | |
331 | axienet_set_mac_address(ndev, addr->sa_data); | |
332 | return 0; | |
333 | } | |
334 | ||
335 | /** | |
336 | * axienet_set_multicast_list - Prepare the multicast table | |
337 | * @ndev: Pointer to the net_device structure | |
338 | * | |
339 | * This function is called to initialize the multicast table during | |
340 | * initialization. The Axi Ethernet basic multicast support has a four-entry | |
341 | * multicast table which is initialized here. Additionally this function | |
342 | * goes into the net_device_ops structure entry ndo_set_multicast_list. This | |
343 | * means whenever the multicast table entries need to be updated this | |
344 | * function gets called. | |
345 | */ | |
346 | static void axienet_set_multicast_list(struct net_device *ndev) | |
347 | { | |
348 | int i; | |
349 | u32 reg, af0reg, af1reg; | |
350 | struct axienet_local *lp = netdev_priv(ndev); | |
351 | ||
352 | if (ndev->flags & (IFF_ALLMULTI | IFF_PROMISC) || | |
353 | netdev_mc_count(ndev) > XAE_MULTICAST_CAM_TABLE_NUM) { | |
354 | /* We must make the kernel realize we had to move into | |
355 | * promiscuous mode. If it was a promiscuous mode request | |
850a7503 MS |
356 | * the flag is already set. If not we set it. |
357 | */ | |
8a3b7a25 | 358 | ndev->flags |= IFF_PROMISC; |
359 | reg = axienet_ior(lp, XAE_FMI_OFFSET); | |
360 | reg |= XAE_FMI_PM_MASK; | |
361 | axienet_iow(lp, XAE_FMI_OFFSET, reg); | |
362 | dev_info(&ndev->dev, "Promiscuous mode enabled.\n"); | |
363 | } else if (!netdev_mc_empty(ndev)) { | |
364 | struct netdev_hw_addr *ha; | |
365 | ||
366 | i = 0; | |
367 | netdev_for_each_mc_addr(ha, ndev) { | |
368 | if (i >= XAE_MULTICAST_CAM_TABLE_NUM) | |
369 | break; | |
370 | ||
371 | af0reg = (ha->addr[0]); | |
372 | af0reg |= (ha->addr[1] << 8); | |
373 | af0reg |= (ha->addr[2] << 16); | |
374 | af0reg |= (ha->addr[3] << 24); | |
375 | ||
376 | af1reg = (ha->addr[4]); | |
377 | af1reg |= (ha->addr[5] << 8); | |
378 | ||
379 | reg = axienet_ior(lp, XAE_FMI_OFFSET) & 0xFFFFFF00; | |
380 | reg |= i; | |
381 | ||
382 | axienet_iow(lp, XAE_FMI_OFFSET, reg); | |
383 | axienet_iow(lp, XAE_AF0_OFFSET, af0reg); | |
384 | axienet_iow(lp, XAE_AF1_OFFSET, af1reg); | |
385 | i++; | |
386 | } | |
387 | } else { | |
388 | reg = axienet_ior(lp, XAE_FMI_OFFSET); | |
389 | reg &= ~XAE_FMI_PM_MASK; | |
390 | ||
391 | axienet_iow(lp, XAE_FMI_OFFSET, reg); | |
392 | ||
393 | for (i = 0; i < XAE_MULTICAST_CAM_TABLE_NUM; i++) { | |
394 | reg = axienet_ior(lp, XAE_FMI_OFFSET) & 0xFFFFFF00; | |
395 | reg |= i; | |
396 | ||
397 | axienet_iow(lp, XAE_FMI_OFFSET, reg); | |
398 | axienet_iow(lp, XAE_AF0_OFFSET, 0); | |
399 | axienet_iow(lp, XAE_AF1_OFFSET, 0); | |
400 | } | |
401 | ||
402 | dev_info(&ndev->dev, "Promiscuous mode disabled.\n"); | |
403 | } | |
404 | } | |
405 | ||
406 | /** | |
407 | * axienet_setoptions - Set an Axi Ethernet option | |
408 | * @ndev: Pointer to the net_device structure | |
409 | * @options: Option to be enabled/disabled | |
410 | * | |
411 | * The Axi Ethernet core has multiple features which can be selectively turned | |
412 | * on or off. The typical options could be jumbo frame option, basic VLAN | |
413 | * option, promiscuous mode option etc. This function is used to set or clear | |
414 | * these options in the Axi Ethernet hardware. This is done through | |
415 | * axienet_option structure . | |
416 | */ | |
417 | static void axienet_setoptions(struct net_device *ndev, u32 options) | |
418 | { | |
419 | int reg; | |
420 | struct axienet_local *lp = netdev_priv(ndev); | |
421 | struct axienet_option *tp = &axienet_options[0]; | |
422 | ||
423 | while (tp->opt) { | |
424 | reg = ((axienet_ior(lp, tp->reg)) & ~(tp->m_or)); | |
425 | if (options & tp->opt) | |
426 | reg |= tp->m_or; | |
427 | axienet_iow(lp, tp->reg, reg); | |
428 | tp++; | |
429 | } | |
430 | ||
431 | lp->options |= options; | |
432 | } | |
433 | ||
434 | static void __axienet_device_reset(struct axienet_local *lp, | |
435 | struct device *dev, off_t offset) | |
436 | { | |
437 | u32 timeout; | |
438 | /* Reset Axi DMA. This would reset Axi Ethernet core as well. The reset | |
439 | * process of Axi DMA takes a while to complete as all pending | |
440 | * commands/transfers will be flushed or completed during this | |
850a7503 MS |
441 | * reset process. |
442 | */ | |
8a3b7a25 | 443 | axienet_dma_out32(lp, offset, XAXIDMA_CR_RESET_MASK); |
444 | timeout = DELAY_OF_ONE_MILLISEC; | |
445 | while (axienet_dma_in32(lp, offset) & XAXIDMA_CR_RESET_MASK) { | |
446 | udelay(1); | |
447 | if (--timeout == 0) { | |
c81a97b5 ST |
448 | netdev_err(lp->ndev, "%s: DMA reset timeout!\n", |
449 | __func__); | |
8a3b7a25 | 450 | break; |
451 | } | |
452 | } | |
453 | } | |
454 | ||
455 | /** | |
456 | * axienet_device_reset - Reset and initialize the Axi Ethernet hardware. | |
457 | * @ndev: Pointer to the net_device structure | |
458 | * | |
459 | * This function is called to reset and initialize the Axi Ethernet core. This | |
460 | * is typically called during initialization. It does a reset of the Axi DMA | |
461 | * Rx/Tx channels and initializes the Axi DMA BDs. Since Axi DMA reset lines | |
462 | * areconnected to Axi Ethernet reset lines, this in turn resets the Axi | |
463 | * Ethernet core. No separate hardware reset is done for the Axi Ethernet | |
464 | * core. | |
465 | */ | |
466 | static void axienet_device_reset(struct net_device *ndev) | |
467 | { | |
468 | u32 axienet_status; | |
469 | struct axienet_local *lp = netdev_priv(ndev); | |
470 | ||
471 | __axienet_device_reset(lp, &ndev->dev, XAXIDMA_TX_CR_OFFSET); | |
472 | __axienet_device_reset(lp, &ndev->dev, XAXIDMA_RX_CR_OFFSET); | |
473 | ||
474 | lp->max_frm_size = XAE_MAX_VLAN_FRAME_SIZE; | |
f080a8c3 | 475 | lp->options |= XAE_OPTION_VLAN; |
8a3b7a25 | 476 | lp->options &= (~XAE_OPTION_JUMBO); |
477 | ||
478 | if ((ndev->mtu > XAE_MTU) && | |
f080a8c3 ST |
479 | (ndev->mtu <= XAE_JUMBO_MTU)) { |
480 | lp->max_frm_size = ndev->mtu + VLAN_ETH_HLEN + | |
481 | XAE_TRL_SIZE; | |
482 | ||
483 | if (lp->max_frm_size <= lp->rxmem) | |
484 | lp->options |= XAE_OPTION_JUMBO; | |
8a3b7a25 | 485 | } |
486 | ||
487 | if (axienet_dma_bd_init(ndev)) { | |
c81a97b5 ST |
488 | netdev_err(ndev, "%s: descriptor allocation failed\n", |
489 | __func__); | |
8a3b7a25 | 490 | } |
491 | ||
492 | axienet_status = axienet_ior(lp, XAE_RCW1_OFFSET); | |
493 | axienet_status &= ~XAE_RCW1_RX_MASK; | |
494 | axienet_iow(lp, XAE_RCW1_OFFSET, axienet_status); | |
495 | ||
496 | axienet_status = axienet_ior(lp, XAE_IP_OFFSET); | |
497 | if (axienet_status & XAE_INT_RXRJECT_MASK) | |
498 | axienet_iow(lp, XAE_IS_OFFSET, XAE_INT_RXRJECT_MASK); | |
499 | ||
500 | axienet_iow(lp, XAE_FCC_OFFSET, XAE_FCC_FCRX_MASK); | |
501 | ||
502 | /* Sync default options with HW but leave receiver and | |
850a7503 MS |
503 | * transmitter disabled. |
504 | */ | |
8a3b7a25 | 505 | axienet_setoptions(ndev, lp->options & |
506 | ~(XAE_OPTION_TXEN | XAE_OPTION_RXEN)); | |
507 | axienet_set_mac_address(ndev, NULL); | |
508 | axienet_set_multicast_list(ndev); | |
509 | axienet_setoptions(ndev, lp->options); | |
510 | ||
511 | ndev->trans_start = jiffies; | |
512 | } | |
513 | ||
514 | /** | |
515 | * axienet_adjust_link - Adjust the PHY link speed/duplex. | |
516 | * @ndev: Pointer to the net_device structure | |
517 | * | |
518 | * This function is called to change the speed and duplex setting after | |
519 | * auto negotiation is done by the PHY. This is the function that gets | |
520 | * registered with the PHY interface through the "of_phy_connect" call. | |
521 | */ | |
522 | static void axienet_adjust_link(struct net_device *ndev) | |
523 | { | |
524 | u32 emmc_reg; | |
525 | u32 link_state; | |
526 | u32 setspeed = 1; | |
527 | struct axienet_local *lp = netdev_priv(ndev); | |
528 | struct phy_device *phy = lp->phy_dev; | |
529 | ||
530 | link_state = phy->speed | (phy->duplex << 1) | phy->link; | |
531 | if (lp->last_link != link_state) { | |
532 | if ((phy->speed == SPEED_10) || (phy->speed == SPEED_100)) { | |
533 | if (lp->phy_type == XAE_PHY_TYPE_1000BASE_X) | |
534 | setspeed = 0; | |
535 | } else { | |
536 | if ((phy->speed == SPEED_1000) && | |
537 | (lp->phy_type == XAE_PHY_TYPE_MII)) | |
538 | setspeed = 0; | |
539 | } | |
540 | ||
541 | if (setspeed == 1) { | |
542 | emmc_reg = axienet_ior(lp, XAE_EMMC_OFFSET); | |
543 | emmc_reg &= ~XAE_EMMC_LINKSPEED_MASK; | |
544 | ||
545 | switch (phy->speed) { | |
546 | case SPEED_1000: | |
547 | emmc_reg |= XAE_EMMC_LINKSPD_1000; | |
548 | break; | |
549 | case SPEED_100: | |
550 | emmc_reg |= XAE_EMMC_LINKSPD_100; | |
551 | break; | |
552 | case SPEED_10: | |
553 | emmc_reg |= XAE_EMMC_LINKSPD_10; | |
554 | break; | |
555 | default: | |
556 | dev_err(&ndev->dev, "Speed other than 10, 100 " | |
557 | "or 1Gbps is not supported\n"); | |
558 | break; | |
559 | } | |
560 | ||
561 | axienet_iow(lp, XAE_EMMC_OFFSET, emmc_reg); | |
562 | lp->last_link = link_state; | |
563 | phy_print_status(phy); | |
564 | } else { | |
c81a97b5 ST |
565 | netdev_err(ndev, |
566 | "Error setting Axi Ethernet mac speed\n"); | |
8a3b7a25 | 567 | } |
568 | } | |
569 | } | |
570 | ||
571 | /** | |
572 | * axienet_start_xmit_done - Invoked once a transmit is completed by the | |
573 | * Axi DMA Tx channel. | |
574 | * @ndev: Pointer to the net_device structure | |
575 | * | |
576 | * This function is invoked from the Axi DMA Tx isr to notify the completion | |
577 | * of transmit operation. It clears fields in the corresponding Tx BDs and | |
578 | * unmaps the corresponding buffer so that CPU can regain ownership of the | |
579 | * buffer. It finally invokes "netif_wake_queue" to restart transmission if | |
580 | * required. | |
581 | */ | |
582 | static void axienet_start_xmit_done(struct net_device *ndev) | |
583 | { | |
584 | u32 size = 0; | |
585 | u32 packets = 0; | |
586 | struct axienet_local *lp = netdev_priv(ndev); | |
587 | struct axidma_bd *cur_p; | |
588 | unsigned int status = 0; | |
589 | ||
590 | cur_p = &lp->tx_bd_v[lp->tx_bd_ci]; | |
591 | status = cur_p->status; | |
592 | while (status & XAXIDMA_BD_STS_COMPLETE_MASK) { | |
593 | dma_unmap_single(ndev->dev.parent, cur_p->phys, | |
594 | (cur_p->cntrl & XAXIDMA_BD_CTRL_LENGTH_MASK), | |
595 | DMA_TO_DEVICE); | |
596 | if (cur_p->app4) | |
597 | dev_kfree_skb_irq((struct sk_buff *)cur_p->app4); | |
598 | /*cur_p->phys = 0;*/ | |
599 | cur_p->app0 = 0; | |
600 | cur_p->app1 = 0; | |
601 | cur_p->app2 = 0; | |
602 | cur_p->app4 = 0; | |
603 | cur_p->status = 0; | |
604 | ||
605 | size += status & XAXIDMA_BD_STS_ACTUAL_LEN_MASK; | |
606 | packets++; | |
607 | ||
91ff37ff MS |
608 | ++lp->tx_bd_ci; |
609 | lp->tx_bd_ci %= TX_BD_NUM; | |
8a3b7a25 | 610 | cur_p = &lp->tx_bd_v[lp->tx_bd_ci]; |
611 | status = cur_p->status; | |
612 | } | |
613 | ||
614 | ndev->stats.tx_packets += packets; | |
615 | ndev->stats.tx_bytes += size; | |
616 | netif_wake_queue(ndev); | |
617 | } | |
618 | ||
619 | /** | |
620 | * axienet_check_tx_bd_space - Checks if a BD/group of BDs are currently busy | |
621 | * @lp: Pointer to the axienet_local structure | |
622 | * @num_frag: The number of BDs to check for | |
623 | * | |
b0d081c5 | 624 | * Return: 0, on success |
8a3b7a25 | 625 | * NETDEV_TX_BUSY, if any of the descriptors are not free |
626 | * | |
627 | * This function is invoked before BDs are allocated and transmission starts. | |
628 | * This function returns 0 if a BD or group of BDs can be allocated for | |
629 | * transmission. If the BD or any of the BDs are not free the function | |
630 | * returns a busy status. This is invoked from axienet_start_xmit. | |
631 | */ | |
632 | static inline int axienet_check_tx_bd_space(struct axienet_local *lp, | |
633 | int num_frag) | |
634 | { | |
635 | struct axidma_bd *cur_p; | |
636 | cur_p = &lp->tx_bd_v[(lp->tx_bd_tail + num_frag) % TX_BD_NUM]; | |
637 | if (cur_p->status & XAXIDMA_BD_STS_ALL_MASK) | |
638 | return NETDEV_TX_BUSY; | |
639 | return 0; | |
640 | } | |
641 | ||
642 | /** | |
643 | * axienet_start_xmit - Starts the transmission. | |
644 | * @skb: sk_buff pointer that contains data to be Txed. | |
645 | * @ndev: Pointer to net_device structure. | |
646 | * | |
b0d081c5 | 647 | * Return: NETDEV_TX_OK, on success |
8a3b7a25 | 648 | * NETDEV_TX_BUSY, if any of the descriptors are not free |
649 | * | |
650 | * This function is invoked from upper layers to initiate transmission. The | |
651 | * function uses the next available free BDs and populates their fields to | |
652 | * start the transmission. Additionally if checksum offloading is supported, | |
653 | * it populates AXI Stream Control fields with appropriate values. | |
654 | */ | |
655 | static int axienet_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
656 | { | |
657 | u32 ii; | |
658 | u32 num_frag; | |
659 | u32 csum_start_off; | |
660 | u32 csum_index_off; | |
661 | skb_frag_t *frag; | |
662 | dma_addr_t tail_p; | |
663 | struct axienet_local *lp = netdev_priv(ndev); | |
664 | struct axidma_bd *cur_p; | |
665 | ||
666 | num_frag = skb_shinfo(skb)->nr_frags; | |
667 | cur_p = &lp->tx_bd_v[lp->tx_bd_tail]; | |
668 | ||
669 | if (axienet_check_tx_bd_space(lp, num_frag)) { | |
670 | if (!netif_queue_stopped(ndev)) | |
671 | netif_stop_queue(ndev); | |
672 | return NETDEV_TX_BUSY; | |
673 | } | |
674 | ||
675 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
676 | if (lp->features & XAE_FEATURE_FULL_TX_CSUM) { | |
677 | /* Tx Full Checksum Offload Enabled */ | |
678 | cur_p->app0 |= 2; | |
679 | } else if (lp->features & XAE_FEATURE_PARTIAL_RX_CSUM) { | |
680 | csum_start_off = skb_transport_offset(skb); | |
681 | csum_index_off = csum_start_off + skb->csum_offset; | |
682 | /* Tx Partial Checksum Offload Enabled */ | |
683 | cur_p->app0 |= 1; | |
684 | cur_p->app1 = (csum_start_off << 16) | csum_index_off; | |
685 | } | |
686 | } else if (skb->ip_summed == CHECKSUM_UNNECESSARY) { | |
687 | cur_p->app0 |= 2; /* Tx Full Checksum Offload Enabled */ | |
688 | } | |
689 | ||
690 | cur_p->cntrl = skb_headlen(skb) | XAXIDMA_BD_CTRL_TXSOF_MASK; | |
691 | cur_p->phys = dma_map_single(ndev->dev.parent, skb->data, | |
692 | skb_headlen(skb), DMA_TO_DEVICE); | |
693 | ||
694 | for (ii = 0; ii < num_frag; ii++) { | |
91ff37ff MS |
695 | ++lp->tx_bd_tail; |
696 | lp->tx_bd_tail %= TX_BD_NUM; | |
8a3b7a25 | 697 | cur_p = &lp->tx_bd_v[lp->tx_bd_tail]; |
698 | frag = &skb_shinfo(skb)->frags[ii]; | |
699 | cur_p->phys = dma_map_single(ndev->dev.parent, | |
700 | skb_frag_address(frag), | |
701 | skb_frag_size(frag), | |
702 | DMA_TO_DEVICE); | |
703 | cur_p->cntrl = skb_frag_size(frag); | |
704 | } | |
705 | ||
706 | cur_p->cntrl |= XAXIDMA_BD_CTRL_TXEOF_MASK; | |
707 | cur_p->app4 = (unsigned long)skb; | |
708 | ||
709 | tail_p = lp->tx_bd_p + sizeof(*lp->tx_bd_v) * lp->tx_bd_tail; | |
710 | /* Start the transfer */ | |
711 | axienet_dma_out32(lp, XAXIDMA_TX_TDESC_OFFSET, tail_p); | |
91ff37ff MS |
712 | ++lp->tx_bd_tail; |
713 | lp->tx_bd_tail %= TX_BD_NUM; | |
8a3b7a25 | 714 | |
715 | return NETDEV_TX_OK; | |
716 | } | |
717 | ||
718 | /** | |
719 | * axienet_recv - Is called from Axi DMA Rx Isr to complete the received | |
720 | * BD processing. | |
721 | * @ndev: Pointer to net_device structure. | |
722 | * | |
723 | * This function is invoked from the Axi DMA Rx isr to process the Rx BDs. It | |
724 | * does minimal processing and invokes "netif_rx" to complete further | |
725 | * processing. | |
726 | */ | |
727 | static void axienet_recv(struct net_device *ndev) | |
728 | { | |
729 | u32 length; | |
730 | u32 csumstatus; | |
731 | u32 size = 0; | |
732 | u32 packets = 0; | |
38e96b35 | 733 | dma_addr_t tail_p = 0; |
8a3b7a25 | 734 | struct axienet_local *lp = netdev_priv(ndev); |
735 | struct sk_buff *skb, *new_skb; | |
736 | struct axidma_bd *cur_p; | |
737 | ||
8a3b7a25 | 738 | cur_p = &lp->rx_bd_v[lp->rx_bd_ci]; |
739 | ||
740 | while ((cur_p->status & XAXIDMA_BD_STS_COMPLETE_MASK)) { | |
38e96b35 | 741 | tail_p = lp->rx_bd_p + sizeof(*lp->rx_bd_v) * lp->rx_bd_ci; |
8a3b7a25 | 742 | skb = (struct sk_buff *) (cur_p->sw_id_offset); |
743 | length = cur_p->app4 & 0x0000FFFF; | |
744 | ||
745 | dma_unmap_single(ndev->dev.parent, cur_p->phys, | |
746 | lp->max_frm_size, | |
747 | DMA_FROM_DEVICE); | |
748 | ||
749 | skb_put(skb, length); | |
750 | skb->protocol = eth_type_trans(skb, ndev); | |
751 | /*skb_checksum_none_assert(skb);*/ | |
752 | skb->ip_summed = CHECKSUM_NONE; | |
753 | ||
754 | /* if we're doing Rx csum offload, set it up */ | |
755 | if (lp->features & XAE_FEATURE_FULL_RX_CSUM) { | |
756 | csumstatus = (cur_p->app2 & | |
757 | XAE_FULL_CSUM_STATUS_MASK) >> 3; | |
758 | if ((csumstatus == XAE_IP_TCP_CSUM_VALIDATED) || | |
759 | (csumstatus == XAE_IP_UDP_CSUM_VALIDATED)) { | |
760 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
761 | } | |
762 | } else if ((lp->features & XAE_FEATURE_PARTIAL_RX_CSUM) != 0 && | |
ceffc4ac | 763 | skb->protocol == htons(ETH_P_IP) && |
8a3b7a25 | 764 | skb->len > 64) { |
765 | skb->csum = be32_to_cpu(cur_p->app3 & 0xFFFF); | |
766 | skb->ip_summed = CHECKSUM_COMPLETE; | |
767 | } | |
768 | ||
769 | netif_rx(skb); | |
770 | ||
771 | size += length; | |
772 | packets++; | |
773 | ||
774 | new_skb = netdev_alloc_skb_ip_align(ndev, lp->max_frm_size); | |
720a43ef | 775 | if (!new_skb) |
8a3b7a25 | 776 | return; |
720a43ef | 777 | |
8a3b7a25 | 778 | cur_p->phys = dma_map_single(ndev->dev.parent, new_skb->data, |
779 | lp->max_frm_size, | |
780 | DMA_FROM_DEVICE); | |
781 | cur_p->cntrl = lp->max_frm_size; | |
782 | cur_p->status = 0; | |
783 | cur_p->sw_id_offset = (u32) new_skb; | |
784 | ||
91ff37ff MS |
785 | ++lp->rx_bd_ci; |
786 | lp->rx_bd_ci %= RX_BD_NUM; | |
8a3b7a25 | 787 | cur_p = &lp->rx_bd_v[lp->rx_bd_ci]; |
788 | } | |
789 | ||
790 | ndev->stats.rx_packets += packets; | |
791 | ndev->stats.rx_bytes += size; | |
792 | ||
38e96b35 PC |
793 | if (tail_p) |
794 | axienet_dma_out32(lp, XAXIDMA_RX_TDESC_OFFSET, tail_p); | |
8a3b7a25 | 795 | } |
796 | ||
797 | /** | |
798 | * axienet_tx_irq - Tx Done Isr. | |
799 | * @irq: irq number | |
800 | * @_ndev: net_device pointer | |
801 | * | |
b0d081c5 | 802 | * Return: IRQ_HANDLED for all cases. |
8a3b7a25 | 803 | * |
804 | * This is the Axi DMA Tx done Isr. It invokes "axienet_start_xmit_done" | |
805 | * to complete the BD processing. | |
806 | */ | |
807 | static irqreturn_t axienet_tx_irq(int irq, void *_ndev) | |
808 | { | |
809 | u32 cr; | |
810 | unsigned int status; | |
811 | struct net_device *ndev = _ndev; | |
812 | struct axienet_local *lp = netdev_priv(ndev); | |
813 | ||
814 | status = axienet_dma_in32(lp, XAXIDMA_TX_SR_OFFSET); | |
815 | if (status & (XAXIDMA_IRQ_IOC_MASK | XAXIDMA_IRQ_DELAY_MASK)) { | |
80c775ac | 816 | axienet_dma_out32(lp, XAXIDMA_TX_SR_OFFSET, status); |
8a3b7a25 | 817 | axienet_start_xmit_done(lp->ndev); |
818 | goto out; | |
819 | } | |
820 | if (!(status & XAXIDMA_IRQ_ALL_MASK)) | |
821 | dev_err(&ndev->dev, "No interrupts asserted in Tx path"); | |
822 | if (status & XAXIDMA_IRQ_ERROR_MASK) { | |
823 | dev_err(&ndev->dev, "DMA Tx error 0x%x\n", status); | |
824 | dev_err(&ndev->dev, "Current BD is at: 0x%x\n", | |
825 | (lp->tx_bd_v[lp->tx_bd_ci]).phys); | |
826 | ||
827 | cr = axienet_dma_in32(lp, XAXIDMA_TX_CR_OFFSET); | |
828 | /* Disable coalesce, delay timer and error interrupts */ | |
829 | cr &= (~XAXIDMA_IRQ_ALL_MASK); | |
830 | /* Write to the Tx channel control register */ | |
831 | axienet_dma_out32(lp, XAXIDMA_TX_CR_OFFSET, cr); | |
832 | ||
833 | cr = axienet_dma_in32(lp, XAXIDMA_RX_CR_OFFSET); | |
834 | /* Disable coalesce, delay timer and error interrupts */ | |
835 | cr &= (~XAXIDMA_IRQ_ALL_MASK); | |
836 | /* Write to the Rx channel control register */ | |
837 | axienet_dma_out32(lp, XAXIDMA_RX_CR_OFFSET, cr); | |
838 | ||
839 | tasklet_schedule(&lp->dma_err_tasklet); | |
80c775ac | 840 | axienet_dma_out32(lp, XAXIDMA_TX_SR_OFFSET, status); |
8a3b7a25 | 841 | } |
842 | out: | |
8a3b7a25 | 843 | return IRQ_HANDLED; |
844 | } | |
845 | ||
846 | /** | |
847 | * axienet_rx_irq - Rx Isr. | |
848 | * @irq: irq number | |
849 | * @_ndev: net_device pointer | |
850 | * | |
b0d081c5 | 851 | * Return: IRQ_HANDLED for all cases. |
8a3b7a25 | 852 | * |
853 | * This is the Axi DMA Rx Isr. It invokes "axienet_recv" to complete the BD | |
854 | * processing. | |
855 | */ | |
856 | static irqreturn_t axienet_rx_irq(int irq, void *_ndev) | |
857 | { | |
858 | u32 cr; | |
859 | unsigned int status; | |
860 | struct net_device *ndev = _ndev; | |
861 | struct axienet_local *lp = netdev_priv(ndev); | |
862 | ||
863 | status = axienet_dma_in32(lp, XAXIDMA_RX_SR_OFFSET); | |
864 | if (status & (XAXIDMA_IRQ_IOC_MASK | XAXIDMA_IRQ_DELAY_MASK)) { | |
80c775ac | 865 | axienet_dma_out32(lp, XAXIDMA_RX_SR_OFFSET, status); |
8a3b7a25 | 866 | axienet_recv(lp->ndev); |
867 | goto out; | |
868 | } | |
869 | if (!(status & XAXIDMA_IRQ_ALL_MASK)) | |
870 | dev_err(&ndev->dev, "No interrupts asserted in Rx path"); | |
871 | if (status & XAXIDMA_IRQ_ERROR_MASK) { | |
872 | dev_err(&ndev->dev, "DMA Rx error 0x%x\n", status); | |
873 | dev_err(&ndev->dev, "Current BD is at: 0x%x\n", | |
874 | (lp->rx_bd_v[lp->rx_bd_ci]).phys); | |
875 | ||
876 | cr = axienet_dma_in32(lp, XAXIDMA_TX_CR_OFFSET); | |
877 | /* Disable coalesce, delay timer and error interrupts */ | |
878 | cr &= (~XAXIDMA_IRQ_ALL_MASK); | |
879 | /* Finally write to the Tx channel control register */ | |
880 | axienet_dma_out32(lp, XAXIDMA_TX_CR_OFFSET, cr); | |
881 | ||
882 | cr = axienet_dma_in32(lp, XAXIDMA_RX_CR_OFFSET); | |
883 | /* Disable coalesce, delay timer and error interrupts */ | |
884 | cr &= (~XAXIDMA_IRQ_ALL_MASK); | |
885 | /* write to the Rx channel control register */ | |
886 | axienet_dma_out32(lp, XAXIDMA_RX_CR_OFFSET, cr); | |
887 | ||
888 | tasklet_schedule(&lp->dma_err_tasklet); | |
80c775ac | 889 | axienet_dma_out32(lp, XAXIDMA_RX_SR_OFFSET, status); |
8a3b7a25 | 890 | } |
891 | out: | |
8a3b7a25 | 892 | return IRQ_HANDLED; |
893 | } | |
894 | ||
aecb55be JM |
895 | static void axienet_dma_err_handler(unsigned long data); |
896 | ||
8a3b7a25 | 897 | /** |
898 | * axienet_open - Driver open routine. | |
899 | * @ndev: Pointer to net_device structure | |
900 | * | |
b0d081c5 | 901 | * Return: 0, on success. |
8a3b7a25 | 902 | * -ENODEV, if PHY cannot be connected to |
903 | * non-zero error value on failure | |
904 | * | |
905 | * This is the driver open routine. It calls phy_start to start the PHY device. | |
906 | * It also allocates interrupt service routines, enables the interrupt lines | |
907 | * and ISR handling. Axi Ethernet core is reset through Axi DMA core. Buffer | |
908 | * descriptors are initialized. | |
909 | */ | |
910 | static int axienet_open(struct net_device *ndev) | |
911 | { | |
912 | int ret, mdio_mcreg; | |
913 | struct axienet_local *lp = netdev_priv(ndev); | |
914 | ||
915 | dev_dbg(&ndev->dev, "axienet_open()\n"); | |
916 | ||
917 | mdio_mcreg = axienet_ior(lp, XAE_MDIO_MC_OFFSET); | |
918 | ret = axienet_mdio_wait_until_ready(lp); | |
919 | if (ret < 0) | |
920 | return ret; | |
921 | /* Disable the MDIO interface till Axi Ethernet Reset is completed. | |
922 | * When we do an Axi Ethernet reset, it resets the complete core | |
923 | * including the MDIO. If MDIO is not disabled when the reset | |
850a7503 MS |
924 | * process is started, MDIO will be broken afterwards. |
925 | */ | |
8a3b7a25 | 926 | axienet_iow(lp, XAE_MDIO_MC_OFFSET, |
927 | (mdio_mcreg & (~XAE_MDIO_MC_MDIOEN_MASK))); | |
928 | axienet_device_reset(ndev); | |
929 | /* Enable the MDIO */ | |
930 | axienet_iow(lp, XAE_MDIO_MC_OFFSET, mdio_mcreg); | |
931 | ret = axienet_mdio_wait_until_ready(lp); | |
932 | if (ret < 0) | |
933 | return ret; | |
934 | ||
935 | if (lp->phy_node) { | |
d1d372e8 ST |
936 | if (lp->phy_type == XAE_PHY_TYPE_GMII) { |
937 | lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node, | |
8a3b7a25 | 938 | axienet_adjust_link, 0, |
939 | PHY_INTERFACE_MODE_GMII); | |
d1d372e8 ST |
940 | } else if (lp->phy_type == XAE_PHY_TYPE_RGMII_2_0) { |
941 | lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node, | |
942 | axienet_adjust_link, 0, | |
943 | PHY_INTERFACE_MODE_RGMII_ID); | |
944 | } | |
945 | ||
d7cc3163 | 946 | if (!lp->phy_dev) |
8a3b7a25 | 947 | dev_err(lp->dev, "of_phy_connect() failed\n"); |
d7cc3163 ST |
948 | else |
949 | phy_start(lp->phy_dev); | |
8a3b7a25 | 950 | } |
951 | ||
71c6c837 XF |
952 | /* Enable tasklets for Axi DMA error handling */ |
953 | tasklet_init(&lp->dma_err_tasklet, axienet_dma_err_handler, | |
954 | (unsigned long) lp); | |
955 | ||
8a3b7a25 | 956 | /* Enable interrupts for Axi DMA Tx */ |
957 | ret = request_irq(lp->tx_irq, axienet_tx_irq, 0, ndev->name, ndev); | |
958 | if (ret) | |
959 | goto err_tx_irq; | |
960 | /* Enable interrupts for Axi DMA Rx */ | |
961 | ret = request_irq(lp->rx_irq, axienet_rx_irq, 0, ndev->name, ndev); | |
962 | if (ret) | |
963 | goto err_rx_irq; | |
71c6c837 | 964 | |
8a3b7a25 | 965 | return 0; |
966 | ||
967 | err_rx_irq: | |
968 | free_irq(lp->tx_irq, ndev); | |
969 | err_tx_irq: | |
970 | if (lp->phy_dev) | |
971 | phy_disconnect(lp->phy_dev); | |
972 | lp->phy_dev = NULL; | |
71c6c837 | 973 | tasklet_kill(&lp->dma_err_tasklet); |
8a3b7a25 | 974 | dev_err(lp->dev, "request_irq() failed\n"); |
975 | return ret; | |
976 | } | |
977 | ||
978 | /** | |
979 | * axienet_stop - Driver stop routine. | |
980 | * @ndev: Pointer to net_device structure | |
981 | * | |
b0d081c5 | 982 | * Return: 0, on success. |
8a3b7a25 | 983 | * |
984 | * This is the driver stop routine. It calls phy_disconnect to stop the PHY | |
985 | * device. It also removes the interrupt handlers and disables the interrupts. | |
986 | * The Axi DMA Tx/Rx BDs are released. | |
987 | */ | |
988 | static int axienet_stop(struct net_device *ndev) | |
989 | { | |
990 | u32 cr; | |
991 | struct axienet_local *lp = netdev_priv(ndev); | |
992 | ||
993 | dev_dbg(&ndev->dev, "axienet_close()\n"); | |
994 | ||
995 | cr = axienet_dma_in32(lp, XAXIDMA_RX_CR_OFFSET); | |
996 | axienet_dma_out32(lp, XAXIDMA_RX_CR_OFFSET, | |
997 | cr & (~XAXIDMA_CR_RUNSTOP_MASK)); | |
998 | cr = axienet_dma_in32(lp, XAXIDMA_TX_CR_OFFSET); | |
999 | axienet_dma_out32(lp, XAXIDMA_TX_CR_OFFSET, | |
1000 | cr & (~XAXIDMA_CR_RUNSTOP_MASK)); | |
1001 | axienet_setoptions(ndev, lp->options & | |
1002 | ~(XAE_OPTION_TXEN | XAE_OPTION_RXEN)); | |
1003 | ||
175c0dff | 1004 | tasklet_kill(&lp->dma_err_tasklet); |
8a3b7a25 | 1005 | |
1006 | free_irq(lp->tx_irq, ndev); | |
1007 | free_irq(lp->rx_irq, ndev); | |
1008 | ||
1009 | if (lp->phy_dev) | |
1010 | phy_disconnect(lp->phy_dev); | |
1011 | lp->phy_dev = NULL; | |
1012 | ||
1013 | axienet_dma_bd_release(ndev); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | /** | |
1018 | * axienet_change_mtu - Driver change mtu routine. | |
1019 | * @ndev: Pointer to net_device structure | |
1020 | * @new_mtu: New mtu value to be applied | |
1021 | * | |
b0d081c5 | 1022 | * Return: Always returns 0 (success). |
8a3b7a25 | 1023 | * |
1024 | * This is the change mtu driver routine. It checks if the Axi Ethernet | |
1025 | * hardware supports jumbo frames before changing the mtu. This can be | |
1026 | * called only when the device is not up. | |
1027 | */ | |
1028 | static int axienet_change_mtu(struct net_device *ndev, int new_mtu) | |
1029 | { | |
1030 | struct axienet_local *lp = netdev_priv(ndev); | |
1031 | ||
1032 | if (netif_running(ndev)) | |
1033 | return -EBUSY; | |
f080a8c3 ST |
1034 | |
1035 | if ((new_mtu + VLAN_ETH_HLEN + | |
1036 | XAE_TRL_SIZE) > lp->rxmem) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | if ((new_mtu > XAE_JUMBO_MTU) || (new_mtu < 64)) | |
1040 | return -EINVAL; | |
1041 | ||
1042 | ndev->mtu = new_mtu; | |
8a3b7a25 | 1043 | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1048 | /** | |
1049 | * axienet_poll_controller - Axi Ethernet poll mechanism. | |
1050 | * @ndev: Pointer to net_device structure | |
1051 | * | |
1052 | * This implements Rx/Tx ISR poll mechanisms. The interrupts are disabled prior | |
1053 | * to polling the ISRs and are enabled back after the polling is done. | |
1054 | */ | |
1055 | static void axienet_poll_controller(struct net_device *ndev) | |
1056 | { | |
1057 | struct axienet_local *lp = netdev_priv(ndev); | |
1058 | disable_irq(lp->tx_irq); | |
1059 | disable_irq(lp->rx_irq); | |
1060 | axienet_rx_irq(lp->tx_irq, ndev); | |
1061 | axienet_tx_irq(lp->rx_irq, ndev); | |
1062 | enable_irq(lp->tx_irq); | |
1063 | enable_irq(lp->rx_irq); | |
1064 | } | |
1065 | #endif | |
1066 | ||
1067 | static const struct net_device_ops axienet_netdev_ops = { | |
1068 | .ndo_open = axienet_open, | |
1069 | .ndo_stop = axienet_stop, | |
1070 | .ndo_start_xmit = axienet_start_xmit, | |
1071 | .ndo_change_mtu = axienet_change_mtu, | |
1072 | .ndo_set_mac_address = netdev_set_mac_address, | |
1073 | .ndo_validate_addr = eth_validate_addr, | |
1074 | .ndo_set_rx_mode = axienet_set_multicast_list, | |
1075 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1076 | .ndo_poll_controller = axienet_poll_controller, | |
1077 | #endif | |
1078 | }; | |
1079 | ||
1080 | /** | |
1081 | * axienet_ethtools_get_settings - Get Axi Ethernet settings related to PHY. | |
1082 | * @ndev: Pointer to net_device structure | |
1083 | * @ecmd: Pointer to ethtool_cmd structure | |
1084 | * | |
1085 | * This implements ethtool command for getting PHY settings. If PHY could | |
1086 | * not be found, the function returns -ENODEV. This function calls the | |
1087 | * relevant PHY ethtool API to get the PHY settings. | |
1088 | * Issue "ethtool ethX" under linux prompt to execute this function. | |
b0d081c5 MS |
1089 | * |
1090 | * Return: 0 on success, -ENODEV if PHY doesn't exist | |
8a3b7a25 | 1091 | */ |
1092 | static int axienet_ethtools_get_settings(struct net_device *ndev, | |
1093 | struct ethtool_cmd *ecmd) | |
1094 | { | |
1095 | struct axienet_local *lp = netdev_priv(ndev); | |
1096 | struct phy_device *phydev = lp->phy_dev; | |
1097 | if (!phydev) | |
1098 | return -ENODEV; | |
1099 | return phy_ethtool_gset(phydev, ecmd); | |
1100 | } | |
1101 | ||
1102 | /** | |
1103 | * axienet_ethtools_set_settings - Set PHY settings as passed in the argument. | |
1104 | * @ndev: Pointer to net_device structure | |
1105 | * @ecmd: Pointer to ethtool_cmd structure | |
1106 | * | |
1107 | * This implements ethtool command for setting various PHY settings. If PHY | |
1108 | * could not be found, the function returns -ENODEV. This function calls the | |
1109 | * relevant PHY ethtool API to set the PHY. | |
1110 | * Issue e.g. "ethtool -s ethX speed 1000" under linux prompt to execute this | |
1111 | * function. | |
b0d081c5 MS |
1112 | * |
1113 | * Return: 0 on success, -ENODEV if PHY doesn't exist | |
8a3b7a25 | 1114 | */ |
1115 | static int axienet_ethtools_set_settings(struct net_device *ndev, | |
1116 | struct ethtool_cmd *ecmd) | |
1117 | { | |
1118 | struct axienet_local *lp = netdev_priv(ndev); | |
1119 | struct phy_device *phydev = lp->phy_dev; | |
1120 | if (!phydev) | |
1121 | return -ENODEV; | |
1122 | return phy_ethtool_sset(phydev, ecmd); | |
1123 | } | |
1124 | ||
1125 | /** | |
1126 | * axienet_ethtools_get_drvinfo - Get various Axi Ethernet driver information. | |
1127 | * @ndev: Pointer to net_device structure | |
1128 | * @ed: Pointer to ethtool_drvinfo structure | |
1129 | * | |
1130 | * This implements ethtool command for getting the driver information. | |
1131 | * Issue "ethtool -i ethX" under linux prompt to execute this function. | |
1132 | */ | |
1133 | static void axienet_ethtools_get_drvinfo(struct net_device *ndev, | |
1134 | struct ethtool_drvinfo *ed) | |
1135 | { | |
7826d43f JP |
1136 | strlcpy(ed->driver, DRIVER_NAME, sizeof(ed->driver)); |
1137 | strlcpy(ed->version, DRIVER_VERSION, sizeof(ed->version)); | |
8a3b7a25 | 1138 | ed->regdump_len = sizeof(u32) * AXIENET_REGS_N; |
1139 | } | |
1140 | ||
1141 | /** | |
1142 | * axienet_ethtools_get_regs_len - Get the total regs length present in the | |
1143 | * AxiEthernet core. | |
1144 | * @ndev: Pointer to net_device structure | |
1145 | * | |
1146 | * This implements ethtool command for getting the total register length | |
1147 | * information. | |
b0d081c5 MS |
1148 | * |
1149 | * Return: the total regs length | |
8a3b7a25 | 1150 | */ |
1151 | static int axienet_ethtools_get_regs_len(struct net_device *ndev) | |
1152 | { | |
1153 | return sizeof(u32) * AXIENET_REGS_N; | |
1154 | } | |
1155 | ||
1156 | /** | |
1157 | * axienet_ethtools_get_regs - Dump the contents of all registers present | |
1158 | * in AxiEthernet core. | |
1159 | * @ndev: Pointer to net_device structure | |
1160 | * @regs: Pointer to ethtool_regs structure | |
1161 | * @ret: Void pointer used to return the contents of the registers. | |
1162 | * | |
1163 | * This implements ethtool command for getting the Axi Ethernet register dump. | |
1164 | * Issue "ethtool -d ethX" to execute this function. | |
1165 | */ | |
1166 | static void axienet_ethtools_get_regs(struct net_device *ndev, | |
1167 | struct ethtool_regs *regs, void *ret) | |
1168 | { | |
1169 | u32 *data = (u32 *) ret; | |
1170 | size_t len = sizeof(u32) * AXIENET_REGS_N; | |
1171 | struct axienet_local *lp = netdev_priv(ndev); | |
1172 | ||
1173 | regs->version = 0; | |
1174 | regs->len = len; | |
1175 | ||
1176 | memset(data, 0, len); | |
1177 | data[0] = axienet_ior(lp, XAE_RAF_OFFSET); | |
1178 | data[1] = axienet_ior(lp, XAE_TPF_OFFSET); | |
1179 | data[2] = axienet_ior(lp, XAE_IFGP_OFFSET); | |
1180 | data[3] = axienet_ior(lp, XAE_IS_OFFSET); | |
1181 | data[4] = axienet_ior(lp, XAE_IP_OFFSET); | |
1182 | data[5] = axienet_ior(lp, XAE_IE_OFFSET); | |
1183 | data[6] = axienet_ior(lp, XAE_TTAG_OFFSET); | |
1184 | data[7] = axienet_ior(lp, XAE_RTAG_OFFSET); | |
1185 | data[8] = axienet_ior(lp, XAE_UAWL_OFFSET); | |
1186 | data[9] = axienet_ior(lp, XAE_UAWU_OFFSET); | |
1187 | data[10] = axienet_ior(lp, XAE_TPID0_OFFSET); | |
1188 | data[11] = axienet_ior(lp, XAE_TPID1_OFFSET); | |
1189 | data[12] = axienet_ior(lp, XAE_PPST_OFFSET); | |
1190 | data[13] = axienet_ior(lp, XAE_RCW0_OFFSET); | |
1191 | data[14] = axienet_ior(lp, XAE_RCW1_OFFSET); | |
1192 | data[15] = axienet_ior(lp, XAE_TC_OFFSET); | |
1193 | data[16] = axienet_ior(lp, XAE_FCC_OFFSET); | |
1194 | data[17] = axienet_ior(lp, XAE_EMMC_OFFSET); | |
1195 | data[18] = axienet_ior(lp, XAE_PHYC_OFFSET); | |
1196 | data[19] = axienet_ior(lp, XAE_MDIO_MC_OFFSET); | |
1197 | data[20] = axienet_ior(lp, XAE_MDIO_MCR_OFFSET); | |
1198 | data[21] = axienet_ior(lp, XAE_MDIO_MWD_OFFSET); | |
1199 | data[22] = axienet_ior(lp, XAE_MDIO_MRD_OFFSET); | |
1200 | data[23] = axienet_ior(lp, XAE_MDIO_MIS_OFFSET); | |
1201 | data[24] = axienet_ior(lp, XAE_MDIO_MIP_OFFSET); | |
1202 | data[25] = axienet_ior(lp, XAE_MDIO_MIE_OFFSET); | |
1203 | data[26] = axienet_ior(lp, XAE_MDIO_MIC_OFFSET); | |
1204 | data[27] = axienet_ior(lp, XAE_UAW0_OFFSET); | |
1205 | data[28] = axienet_ior(lp, XAE_UAW1_OFFSET); | |
1206 | data[29] = axienet_ior(lp, XAE_FMI_OFFSET); | |
1207 | data[30] = axienet_ior(lp, XAE_AF0_OFFSET); | |
1208 | data[31] = axienet_ior(lp, XAE_AF1_OFFSET); | |
1209 | } | |
1210 | ||
1211 | /** | |
1212 | * axienet_ethtools_get_pauseparam - Get the pause parameter setting for | |
1213 | * Tx and Rx paths. | |
1214 | * @ndev: Pointer to net_device structure | |
1215 | * @epauseparm: Pointer to ethtool_pauseparam structure. | |
1216 | * | |
1217 | * This implements ethtool command for getting axi ethernet pause frame | |
1218 | * setting. Issue "ethtool -a ethX" to execute this function. | |
1219 | */ | |
1220 | static void | |
1221 | axienet_ethtools_get_pauseparam(struct net_device *ndev, | |
1222 | struct ethtool_pauseparam *epauseparm) | |
1223 | { | |
1224 | u32 regval; | |
1225 | struct axienet_local *lp = netdev_priv(ndev); | |
1226 | epauseparm->autoneg = 0; | |
1227 | regval = axienet_ior(lp, XAE_FCC_OFFSET); | |
1228 | epauseparm->tx_pause = regval & XAE_FCC_FCTX_MASK; | |
1229 | epauseparm->rx_pause = regval & XAE_FCC_FCRX_MASK; | |
1230 | } | |
1231 | ||
1232 | /** | |
1233 | * axienet_ethtools_set_pauseparam - Set device pause parameter(flow control) | |
1234 | * settings. | |
1235 | * @ndev: Pointer to net_device structure | |
b0d081c5 | 1236 | * @epauseparm:Pointer to ethtool_pauseparam structure |
8a3b7a25 | 1237 | * |
1238 | * This implements ethtool command for enabling flow control on Rx and Tx | |
1239 | * paths. Issue "ethtool -A ethX tx on|off" under linux prompt to execute this | |
1240 | * function. | |
b0d081c5 MS |
1241 | * |
1242 | * Return: 0 on success, -EFAULT if device is running | |
8a3b7a25 | 1243 | */ |
1244 | static int | |
1245 | axienet_ethtools_set_pauseparam(struct net_device *ndev, | |
1246 | struct ethtool_pauseparam *epauseparm) | |
1247 | { | |
1248 | u32 regval = 0; | |
1249 | struct axienet_local *lp = netdev_priv(ndev); | |
1250 | ||
1251 | if (netif_running(ndev)) { | |
c81a97b5 ST |
1252 | netdev_err(ndev, |
1253 | "Please stop netif before applying configuration\n"); | |
8a3b7a25 | 1254 | return -EFAULT; |
1255 | } | |
1256 | ||
1257 | regval = axienet_ior(lp, XAE_FCC_OFFSET); | |
1258 | if (epauseparm->tx_pause) | |
1259 | regval |= XAE_FCC_FCTX_MASK; | |
1260 | else | |
1261 | regval &= ~XAE_FCC_FCTX_MASK; | |
1262 | if (epauseparm->rx_pause) | |
1263 | regval |= XAE_FCC_FCRX_MASK; | |
1264 | else | |
1265 | regval &= ~XAE_FCC_FCRX_MASK; | |
1266 | axienet_iow(lp, XAE_FCC_OFFSET, regval); | |
1267 | ||
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | /** | |
1272 | * axienet_ethtools_get_coalesce - Get DMA interrupt coalescing count. | |
1273 | * @ndev: Pointer to net_device structure | |
1274 | * @ecoalesce: Pointer to ethtool_coalesce structure | |
1275 | * | |
1276 | * This implements ethtool command for getting the DMA interrupt coalescing | |
1277 | * count on Tx and Rx paths. Issue "ethtool -c ethX" under linux prompt to | |
1278 | * execute this function. | |
b0d081c5 MS |
1279 | * |
1280 | * Return: 0 always | |
8a3b7a25 | 1281 | */ |
1282 | static int axienet_ethtools_get_coalesce(struct net_device *ndev, | |
1283 | struct ethtool_coalesce *ecoalesce) | |
1284 | { | |
1285 | u32 regval = 0; | |
1286 | struct axienet_local *lp = netdev_priv(ndev); | |
1287 | regval = axienet_dma_in32(lp, XAXIDMA_RX_CR_OFFSET); | |
1288 | ecoalesce->rx_max_coalesced_frames = (regval & XAXIDMA_COALESCE_MASK) | |
1289 | >> XAXIDMA_COALESCE_SHIFT; | |
1290 | regval = axienet_dma_in32(lp, XAXIDMA_TX_CR_OFFSET); | |
1291 | ecoalesce->tx_max_coalesced_frames = (regval & XAXIDMA_COALESCE_MASK) | |
1292 | >> XAXIDMA_COALESCE_SHIFT; | |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | /** | |
1297 | * axienet_ethtools_set_coalesce - Set DMA interrupt coalescing count. | |
1298 | * @ndev: Pointer to net_device structure | |
1299 | * @ecoalesce: Pointer to ethtool_coalesce structure | |
1300 | * | |
1301 | * This implements ethtool command for setting the DMA interrupt coalescing | |
1302 | * count on Tx and Rx paths. Issue "ethtool -C ethX rx-frames 5" under linux | |
1303 | * prompt to execute this function. | |
b0d081c5 MS |
1304 | * |
1305 | * Return: 0, on success, Non-zero error value on failure. | |
8a3b7a25 | 1306 | */ |
1307 | static int axienet_ethtools_set_coalesce(struct net_device *ndev, | |
1308 | struct ethtool_coalesce *ecoalesce) | |
1309 | { | |
1310 | struct axienet_local *lp = netdev_priv(ndev); | |
1311 | ||
1312 | if (netif_running(ndev)) { | |
c81a97b5 ST |
1313 | netdev_err(ndev, |
1314 | "Please stop netif before applying configuration\n"); | |
8a3b7a25 | 1315 | return -EFAULT; |
1316 | } | |
1317 | ||
1318 | if ((ecoalesce->rx_coalesce_usecs) || | |
1319 | (ecoalesce->rx_coalesce_usecs_irq) || | |
1320 | (ecoalesce->rx_max_coalesced_frames_irq) || | |
1321 | (ecoalesce->tx_coalesce_usecs) || | |
1322 | (ecoalesce->tx_coalesce_usecs_irq) || | |
1323 | (ecoalesce->tx_max_coalesced_frames_irq) || | |
1324 | (ecoalesce->stats_block_coalesce_usecs) || | |
1325 | (ecoalesce->use_adaptive_rx_coalesce) || | |
1326 | (ecoalesce->use_adaptive_tx_coalesce) || | |
1327 | (ecoalesce->pkt_rate_low) || | |
1328 | (ecoalesce->rx_coalesce_usecs_low) || | |
1329 | (ecoalesce->rx_max_coalesced_frames_low) || | |
1330 | (ecoalesce->tx_coalesce_usecs_low) || | |
1331 | (ecoalesce->tx_max_coalesced_frames_low) || | |
1332 | (ecoalesce->pkt_rate_high) || | |
1333 | (ecoalesce->rx_coalesce_usecs_high) || | |
1334 | (ecoalesce->rx_max_coalesced_frames_high) || | |
1335 | (ecoalesce->tx_coalesce_usecs_high) || | |
1336 | (ecoalesce->tx_max_coalesced_frames_high) || | |
1337 | (ecoalesce->rate_sample_interval)) | |
1338 | return -EOPNOTSUPP; | |
1339 | if (ecoalesce->rx_max_coalesced_frames) | |
1340 | lp->coalesce_count_rx = ecoalesce->rx_max_coalesced_frames; | |
1341 | if (ecoalesce->tx_max_coalesced_frames) | |
1342 | lp->coalesce_count_tx = ecoalesce->tx_max_coalesced_frames; | |
1343 | ||
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | static struct ethtool_ops axienet_ethtool_ops = { | |
1348 | .get_settings = axienet_ethtools_get_settings, | |
1349 | .set_settings = axienet_ethtools_set_settings, | |
1350 | .get_drvinfo = axienet_ethtools_get_drvinfo, | |
1351 | .get_regs_len = axienet_ethtools_get_regs_len, | |
1352 | .get_regs = axienet_ethtools_get_regs, | |
1353 | .get_link = ethtool_op_get_link, | |
1354 | .get_pauseparam = axienet_ethtools_get_pauseparam, | |
1355 | .set_pauseparam = axienet_ethtools_set_pauseparam, | |
1356 | .get_coalesce = axienet_ethtools_get_coalesce, | |
1357 | .set_coalesce = axienet_ethtools_set_coalesce, | |
1358 | }; | |
1359 | ||
1360 | /** | |
1361 | * axienet_dma_err_handler - Tasklet handler for Axi DMA Error | |
1362 | * @data: Data passed | |
1363 | * | |
1364 | * Resets the Axi DMA and Axi Ethernet devices, and reconfigures the | |
1365 | * Tx/Rx BDs. | |
1366 | */ | |
1367 | static void axienet_dma_err_handler(unsigned long data) | |
1368 | { | |
1369 | u32 axienet_status; | |
1370 | u32 cr, i; | |
1371 | int mdio_mcreg; | |
1372 | struct axienet_local *lp = (struct axienet_local *) data; | |
1373 | struct net_device *ndev = lp->ndev; | |
1374 | struct axidma_bd *cur_p; | |
1375 | ||
1376 | axienet_setoptions(ndev, lp->options & | |
1377 | ~(XAE_OPTION_TXEN | XAE_OPTION_RXEN)); | |
1378 | mdio_mcreg = axienet_ior(lp, XAE_MDIO_MC_OFFSET); | |
1379 | axienet_mdio_wait_until_ready(lp); | |
1380 | /* Disable the MDIO interface till Axi Ethernet Reset is completed. | |
1381 | * When we do an Axi Ethernet reset, it resets the complete core | |
1382 | * including the MDIO. So if MDIO is not disabled when the reset | |
850a7503 MS |
1383 | * process is started, MDIO will be broken afterwards. |
1384 | */ | |
8a3b7a25 | 1385 | axienet_iow(lp, XAE_MDIO_MC_OFFSET, (mdio_mcreg & |
1386 | ~XAE_MDIO_MC_MDIOEN_MASK)); | |
1387 | ||
1388 | __axienet_device_reset(lp, &ndev->dev, XAXIDMA_TX_CR_OFFSET); | |
1389 | __axienet_device_reset(lp, &ndev->dev, XAXIDMA_RX_CR_OFFSET); | |
1390 | ||
1391 | axienet_iow(lp, XAE_MDIO_MC_OFFSET, mdio_mcreg); | |
1392 | axienet_mdio_wait_until_ready(lp); | |
1393 | ||
1394 | for (i = 0; i < TX_BD_NUM; i++) { | |
1395 | cur_p = &lp->tx_bd_v[i]; | |
1396 | if (cur_p->phys) | |
1397 | dma_unmap_single(ndev->dev.parent, cur_p->phys, | |
1398 | (cur_p->cntrl & | |
1399 | XAXIDMA_BD_CTRL_LENGTH_MASK), | |
1400 | DMA_TO_DEVICE); | |
1401 | if (cur_p->app4) | |
1402 | dev_kfree_skb_irq((struct sk_buff *) cur_p->app4); | |
1403 | cur_p->phys = 0; | |
1404 | cur_p->cntrl = 0; | |
1405 | cur_p->status = 0; | |
1406 | cur_p->app0 = 0; | |
1407 | cur_p->app1 = 0; | |
1408 | cur_p->app2 = 0; | |
1409 | cur_p->app3 = 0; | |
1410 | cur_p->app4 = 0; | |
1411 | cur_p->sw_id_offset = 0; | |
1412 | } | |
1413 | ||
1414 | for (i = 0; i < RX_BD_NUM; i++) { | |
1415 | cur_p = &lp->rx_bd_v[i]; | |
1416 | cur_p->status = 0; | |
1417 | cur_p->app0 = 0; | |
1418 | cur_p->app1 = 0; | |
1419 | cur_p->app2 = 0; | |
1420 | cur_p->app3 = 0; | |
1421 | cur_p->app4 = 0; | |
1422 | } | |
1423 | ||
1424 | lp->tx_bd_ci = 0; | |
1425 | lp->tx_bd_tail = 0; | |
1426 | lp->rx_bd_ci = 0; | |
1427 | ||
1428 | /* Start updating the Rx channel control register */ | |
1429 | cr = axienet_dma_in32(lp, XAXIDMA_RX_CR_OFFSET); | |
1430 | /* Update the interrupt coalesce count */ | |
1431 | cr = ((cr & ~XAXIDMA_COALESCE_MASK) | | |
1432 | (XAXIDMA_DFT_RX_THRESHOLD << XAXIDMA_COALESCE_SHIFT)); | |
1433 | /* Update the delay timer count */ | |
1434 | cr = ((cr & ~XAXIDMA_DELAY_MASK) | | |
1435 | (XAXIDMA_DFT_RX_WAITBOUND << XAXIDMA_DELAY_SHIFT)); | |
1436 | /* Enable coalesce, delay timer and error interrupts */ | |
1437 | cr |= XAXIDMA_IRQ_ALL_MASK; | |
1438 | /* Finally write to the Rx channel control register */ | |
1439 | axienet_dma_out32(lp, XAXIDMA_RX_CR_OFFSET, cr); | |
1440 | ||
1441 | /* Start updating the Tx channel control register */ | |
1442 | cr = axienet_dma_in32(lp, XAXIDMA_TX_CR_OFFSET); | |
1443 | /* Update the interrupt coalesce count */ | |
1444 | cr = (((cr & ~XAXIDMA_COALESCE_MASK)) | | |
1445 | (XAXIDMA_DFT_TX_THRESHOLD << XAXIDMA_COALESCE_SHIFT)); | |
1446 | /* Update the delay timer count */ | |
1447 | cr = (((cr & ~XAXIDMA_DELAY_MASK)) | | |
1448 | (XAXIDMA_DFT_TX_WAITBOUND << XAXIDMA_DELAY_SHIFT)); | |
1449 | /* Enable coalesce, delay timer and error interrupts */ | |
1450 | cr |= XAXIDMA_IRQ_ALL_MASK; | |
1451 | /* Finally write to the Tx channel control register */ | |
1452 | axienet_dma_out32(lp, XAXIDMA_TX_CR_OFFSET, cr); | |
1453 | ||
1454 | /* Populate the tail pointer and bring the Rx Axi DMA engine out of | |
850a7503 MS |
1455 | * halted state. This will make the Rx side ready for reception. |
1456 | */ | |
8a3b7a25 | 1457 | axienet_dma_out32(lp, XAXIDMA_RX_CDESC_OFFSET, lp->rx_bd_p); |
1458 | cr = axienet_dma_in32(lp, XAXIDMA_RX_CR_OFFSET); | |
1459 | axienet_dma_out32(lp, XAXIDMA_RX_CR_OFFSET, | |
1460 | cr | XAXIDMA_CR_RUNSTOP_MASK); | |
1461 | axienet_dma_out32(lp, XAXIDMA_RX_TDESC_OFFSET, lp->rx_bd_p + | |
1462 | (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1))); | |
1463 | ||
1464 | /* Write to the RS (Run-stop) bit in the Tx channel control register. | |
1465 | * Tx channel is now ready to run. But only after we write to the | |
850a7503 MS |
1466 | * tail pointer register that the Tx channel will start transmitting |
1467 | */ | |
8a3b7a25 | 1468 | axienet_dma_out32(lp, XAXIDMA_TX_CDESC_OFFSET, lp->tx_bd_p); |
1469 | cr = axienet_dma_in32(lp, XAXIDMA_TX_CR_OFFSET); | |
1470 | axienet_dma_out32(lp, XAXIDMA_TX_CR_OFFSET, | |
1471 | cr | XAXIDMA_CR_RUNSTOP_MASK); | |
1472 | ||
1473 | axienet_status = axienet_ior(lp, XAE_RCW1_OFFSET); | |
1474 | axienet_status &= ~XAE_RCW1_RX_MASK; | |
1475 | axienet_iow(lp, XAE_RCW1_OFFSET, axienet_status); | |
1476 | ||
1477 | axienet_status = axienet_ior(lp, XAE_IP_OFFSET); | |
1478 | if (axienet_status & XAE_INT_RXRJECT_MASK) | |
1479 | axienet_iow(lp, XAE_IS_OFFSET, XAE_INT_RXRJECT_MASK); | |
1480 | axienet_iow(lp, XAE_FCC_OFFSET, XAE_FCC_FCRX_MASK); | |
1481 | ||
1482 | /* Sync default options with HW but leave receiver and | |
850a7503 MS |
1483 | * transmitter disabled. |
1484 | */ | |
8a3b7a25 | 1485 | axienet_setoptions(ndev, lp->options & |
1486 | ~(XAE_OPTION_TXEN | XAE_OPTION_RXEN)); | |
1487 | axienet_set_mac_address(ndev, NULL); | |
1488 | axienet_set_multicast_list(ndev); | |
1489 | axienet_setoptions(ndev, lp->options); | |
1490 | } | |
1491 | ||
1492 | /** | |
2be58620 | 1493 | * axienet_probe - Axi Ethernet probe function. |
95219aa5 | 1494 | * @pdev: Pointer to platform device structure. |
8a3b7a25 | 1495 | * |
b0d081c5 | 1496 | * Return: 0, on success |
8a3b7a25 | 1497 | * Non-zero error value on failure. |
1498 | * | |
1499 | * This is the probe routine for Axi Ethernet driver. This is called before | |
1500 | * any other driver routines are invoked. It allocates and sets up the Ethernet | |
1501 | * device. Parses through device tree and populates fields of | |
1502 | * axienet_local. It registers the Ethernet device. | |
1503 | */ | |
2be58620 | 1504 | static int axienet_probe(struct platform_device *pdev) |
8a3b7a25 | 1505 | { |
8495659b | 1506 | int ret; |
8a3b7a25 | 1507 | struct device_node *np; |
1508 | struct axienet_local *lp; | |
1509 | struct net_device *ndev; | |
8495659b | 1510 | u8 mac_addr[6]; |
46aa27df | 1511 | struct resource *ethres, dmares; |
8495659b | 1512 | u32 value; |
8a3b7a25 | 1513 | |
1514 | ndev = alloc_etherdev(sizeof(*lp)); | |
41de8d4c | 1515 | if (!ndev) |
8a3b7a25 | 1516 | return -ENOMEM; |
8a3b7a25 | 1517 | |
95219aa5 | 1518 | platform_set_drvdata(pdev, ndev); |
8a3b7a25 | 1519 | |
95219aa5 | 1520 | SET_NETDEV_DEV(ndev, &pdev->dev); |
8a3b7a25 | 1521 | ndev->flags &= ~IFF_MULTICAST; /* clear multicast */ |
28e24c62 | 1522 | ndev->features = NETIF_F_SG; |
8a3b7a25 | 1523 | ndev->netdev_ops = &axienet_netdev_ops; |
1524 | ndev->ethtool_ops = &axienet_ethtool_ops; | |
1525 | ||
1526 | lp = netdev_priv(ndev); | |
1527 | lp->ndev = ndev; | |
95219aa5 | 1528 | lp->dev = &pdev->dev; |
8a3b7a25 | 1529 | lp->options = XAE_OPTION_DEFAULTS; |
1530 | /* Map device registers */ | |
46aa27df ST |
1531 | ethres = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1532 | lp->regs = devm_ioremap_resource(&pdev->dev, ethres); | |
8a3b7a25 | 1533 | if (!lp->regs) { |
95219aa5 | 1534 | dev_err(&pdev->dev, "could not map Axi Ethernet regs.\n"); |
0f113b81 | 1535 | ret = -ENOMEM; |
46aa27df | 1536 | goto free_netdev; |
8a3b7a25 | 1537 | } |
46aa27df | 1538 | |
8a3b7a25 | 1539 | /* Setup checksum offload, but default to off if not specified */ |
1540 | lp->features = 0; | |
1541 | ||
8495659b ST |
1542 | ret = of_property_read_u32(pdev->dev.of_node, "xlnx,txcsum", &value); |
1543 | if (!ret) { | |
1544 | switch (value) { | |
8a3b7a25 | 1545 | case 1: |
1546 | lp->csum_offload_on_tx_path = | |
1547 | XAE_FEATURE_PARTIAL_TX_CSUM; | |
1548 | lp->features |= XAE_FEATURE_PARTIAL_TX_CSUM; | |
1549 | /* Can checksum TCP/UDP over IPv4. */ | |
1550 | ndev->features |= NETIF_F_IP_CSUM; | |
1551 | break; | |
1552 | case 2: | |
1553 | lp->csum_offload_on_tx_path = | |
1554 | XAE_FEATURE_FULL_TX_CSUM; | |
1555 | lp->features |= XAE_FEATURE_FULL_TX_CSUM; | |
1556 | /* Can checksum TCP/UDP over IPv4. */ | |
1557 | ndev->features |= NETIF_F_IP_CSUM; | |
1558 | break; | |
1559 | default: | |
1560 | lp->csum_offload_on_tx_path = XAE_NO_CSUM_OFFLOAD; | |
1561 | } | |
1562 | } | |
8495659b ST |
1563 | ret = of_property_read_u32(pdev->dev.of_node, "xlnx,rxcsum", &value); |
1564 | if (!ret) { | |
1565 | switch (value) { | |
8a3b7a25 | 1566 | case 1: |
1567 | lp->csum_offload_on_rx_path = | |
1568 | XAE_FEATURE_PARTIAL_RX_CSUM; | |
1569 | lp->features |= XAE_FEATURE_PARTIAL_RX_CSUM; | |
1570 | break; | |
1571 | case 2: | |
1572 | lp->csum_offload_on_rx_path = | |
1573 | XAE_FEATURE_FULL_RX_CSUM; | |
1574 | lp->features |= XAE_FEATURE_FULL_RX_CSUM; | |
1575 | break; | |
1576 | default: | |
1577 | lp->csum_offload_on_rx_path = XAE_NO_CSUM_OFFLOAD; | |
1578 | } | |
1579 | } | |
1580 | /* For supporting jumbo frames, the Axi Ethernet hardware must have | |
f080a8c3 ST |
1581 | * a larger Rx/Tx Memory. Typically, the size must be large so that |
1582 | * we can enable jumbo option and start supporting jumbo frames. | |
1583 | * Here we check for memory allocated for Rx/Tx in the hardware from | |
1584 | * the device-tree and accordingly set flags. | |
1585 | */ | |
8495659b ST |
1586 | of_property_read_u32(pdev->dev.of_node, "xlnx,rxmem", &lp->rxmem); |
1587 | of_property_read_u32(pdev->dev.of_node, "xlnx,phy-type", &lp->phy_type); | |
8a3b7a25 | 1588 | |
1589 | /* Find the DMA node, map the DMA registers, and decode the DMA IRQs */ | |
95219aa5 | 1590 | np = of_parse_phandle(pdev->dev.of_node, "axistream-connected", 0); |
46aa27df | 1591 | if (IS_ERR(np)) { |
95219aa5 | 1592 | dev_err(&pdev->dev, "could not find DMA node\n"); |
46aa27df ST |
1593 | ret = PTR_ERR(np); |
1594 | goto free_netdev; | |
8a3b7a25 | 1595 | } |
46aa27df ST |
1596 | ret = of_address_to_resource(np, 0, &dmares); |
1597 | if (ret) { | |
1598 | dev_err(&pdev->dev, "unable to get DMA resource\n"); | |
1599 | goto free_netdev; | |
1600 | } | |
1601 | lp->dma_regs = devm_ioremap_resource(&pdev->dev, &dmares); | |
1602 | if (!lp->dma_regs) { | |
1603 | dev_err(&pdev->dev, "could not map DMA regs\n"); | |
1604 | ret = -ENOMEM; | |
1605 | goto free_netdev; | |
8a3b7a25 | 1606 | } |
1607 | lp->rx_irq = irq_of_parse_and_map(np, 1); | |
1608 | lp->tx_irq = irq_of_parse_and_map(np, 0); | |
1609 | of_node_put(np); | |
cb59c87d | 1610 | if ((lp->rx_irq <= 0) || (lp->tx_irq <= 0)) { |
95219aa5 | 1611 | dev_err(&pdev->dev, "could not determine irqs\n"); |
8a3b7a25 | 1612 | ret = -ENOMEM; |
46aa27df | 1613 | goto free_netdev; |
8a3b7a25 | 1614 | } |
1615 | ||
1616 | /* Retrieve the MAC address */ | |
8495659b ST |
1617 | ret = of_property_read_u8_array(pdev->dev.of_node, |
1618 | "local-mac-address", mac_addr, 6); | |
1619 | if (ret) { | |
95219aa5 | 1620 | dev_err(&pdev->dev, "could not find MAC address\n"); |
46aa27df | 1621 | goto free_netdev; |
8a3b7a25 | 1622 | } |
8495659b | 1623 | axienet_set_mac_address(ndev, (void *)mac_addr); |
8a3b7a25 | 1624 | |
1625 | lp->coalesce_count_rx = XAXIDMA_DFT_RX_THRESHOLD; | |
1626 | lp->coalesce_count_tx = XAXIDMA_DFT_TX_THRESHOLD; | |
1627 | ||
95219aa5 | 1628 | lp->phy_node = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0); |
46aa27df | 1629 | if (lp->phy_node) { |
95219aa5 | 1630 | ret = axienet_mdio_setup(lp, pdev->dev.of_node); |
46aa27df ST |
1631 | if (ret) |
1632 | dev_warn(&pdev->dev, "error registering MDIO bus\n"); | |
1633 | } | |
8a3b7a25 | 1634 | |
1635 | ret = register_netdev(lp->ndev); | |
1636 | if (ret) { | |
1637 | dev_err(lp->dev, "register_netdev() error (%i)\n", ret); | |
46aa27df | 1638 | goto free_netdev; |
8a3b7a25 | 1639 | } |
1640 | ||
8a3b7a25 | 1641 | return 0; |
1642 | ||
46aa27df | 1643 | free_netdev: |
8a3b7a25 | 1644 | free_netdev(ndev); |
46aa27df | 1645 | |
8a3b7a25 | 1646 | return ret; |
1647 | } | |
1648 | ||
2be58620 | 1649 | static int axienet_remove(struct platform_device *pdev) |
8a3b7a25 | 1650 | { |
95219aa5 | 1651 | struct net_device *ndev = platform_get_drvdata(pdev); |
8a3b7a25 | 1652 | struct axienet_local *lp = netdev_priv(ndev); |
1653 | ||
1654 | axienet_mdio_teardown(lp); | |
1655 | unregister_netdev(ndev); | |
1656 | ||
6f3a59ac | 1657 | of_node_put(lp->phy_node); |
8a3b7a25 | 1658 | lp->phy_node = NULL; |
1659 | ||
8a3b7a25 | 1660 | free_netdev(ndev); |
1661 | ||
1662 | return 0; | |
1663 | } | |
1664 | ||
2be58620 ST |
1665 | static struct platform_driver axienet_driver = { |
1666 | .probe = axienet_probe, | |
1667 | .remove = axienet_remove, | |
8a3b7a25 | 1668 | .driver = { |
8a3b7a25 | 1669 | .name = "xilinx_axienet", |
1670 | .of_match_table = axienet_of_match, | |
1671 | }, | |
1672 | }; | |
1673 | ||
2be58620 | 1674 | module_platform_driver(axienet_driver); |
8a3b7a25 | 1675 | |
1676 | MODULE_DESCRIPTION("Xilinx Axi Ethernet driver"); | |
1677 | MODULE_AUTHOR("Xilinx"); | |
1678 | MODULE_LICENSE("GPL"); |