2 * Copyright 2010-2011 Calxeda, Inc.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/circ_buf.h>
20 #include <linux/interrupt.h>
21 #include <linux/etherdevice.h>
22 #include <linux/platform_device.h>
23 #include <linux/skbuff.h>
24 #include <linux/ethtool.h>
26 #include <linux/crc32.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/slab.h>
30 /* XGMAC Register definitions */
31 #define XGMAC_CONTROL 0x00000000 /* MAC Configuration */
32 #define XGMAC_FRAME_FILTER 0x00000004 /* MAC Frame Filter */
33 #define XGMAC_FLOW_CTRL 0x00000018 /* MAC Flow Control */
34 #define XGMAC_VLAN_TAG 0x0000001C /* VLAN Tags */
35 #define XGMAC_VERSION 0x00000020 /* Version */
36 #define XGMAC_VLAN_INCL 0x00000024 /* VLAN tag for tx frames */
37 #define XGMAC_LPI_CTRL 0x00000028 /* LPI Control and Status */
38 #define XGMAC_LPI_TIMER 0x0000002C /* LPI Timers Control */
39 #define XGMAC_TX_PACE 0x00000030 /* Transmit Pace and Stretch */
40 #define XGMAC_VLAN_HASH 0x00000034 /* VLAN Hash Table */
41 #define XGMAC_DEBUG 0x00000038 /* Debug */
42 #define XGMAC_INT_STAT 0x0000003C /* Interrupt and Control */
43 #define XGMAC_ADDR_HIGH(reg) (0x00000040 + ((reg) * 8))
44 #define XGMAC_ADDR_LOW(reg) (0x00000044 + ((reg) * 8))
45 #define XGMAC_HASH(n) (0x00000300 + (n) * 4) /* HASH table regs */
46 #define XGMAC_NUM_HASH 16
47 #define XGMAC_OMR 0x00000400
48 #define XGMAC_REMOTE_WAKE 0x00000700 /* Remote Wake-Up Frm Filter */
49 #define XGMAC_PMT 0x00000704 /* PMT Control and Status */
50 #define XGMAC_MMC_CTRL 0x00000800 /* XGMAC MMC Control */
51 #define XGMAC_MMC_INTR_RX 0x00000804 /* Recieve Interrupt */
52 #define XGMAC_MMC_INTR_TX 0x00000808 /* Transmit Interrupt */
53 #define XGMAC_MMC_INTR_MASK_RX 0x0000080c /* Recieve Interrupt Mask */
54 #define XGMAC_MMC_INTR_MASK_TX 0x00000810 /* Transmit Interrupt Mask */
56 /* Hardware TX Statistics Counters */
57 #define XGMAC_MMC_TXOCTET_GB_LO 0x00000814
58 #define XGMAC_MMC_TXOCTET_GB_HI 0x00000818
59 #define XGMAC_MMC_TXFRAME_GB_LO 0x0000081C
60 #define XGMAC_MMC_TXFRAME_GB_HI 0x00000820
61 #define XGMAC_MMC_TXBCFRAME_G 0x00000824
62 #define XGMAC_MMC_TXMCFRAME_G 0x0000082C
63 #define XGMAC_MMC_TXUCFRAME_GB 0x00000864
64 #define XGMAC_MMC_TXMCFRAME_GB 0x0000086C
65 #define XGMAC_MMC_TXBCFRAME_GB 0x00000874
66 #define XGMAC_MMC_TXUNDERFLOW 0x0000087C
67 #define XGMAC_MMC_TXOCTET_G_LO 0x00000884
68 #define XGMAC_MMC_TXOCTET_G_HI 0x00000888
69 #define XGMAC_MMC_TXFRAME_G_LO 0x0000088C
70 #define XGMAC_MMC_TXFRAME_G_HI 0x00000890
71 #define XGMAC_MMC_TXPAUSEFRAME 0x00000894
72 #define XGMAC_MMC_TXVLANFRAME 0x0000089C
74 /* Hardware RX Statistics Counters */
75 #define XGMAC_MMC_RXFRAME_GB_LO 0x00000900
76 #define XGMAC_MMC_RXFRAME_GB_HI 0x00000904
77 #define XGMAC_MMC_RXOCTET_GB_LO 0x00000908
78 #define XGMAC_MMC_RXOCTET_GB_HI 0x0000090C
79 #define XGMAC_MMC_RXOCTET_G_LO 0x00000910
80 #define XGMAC_MMC_RXOCTET_G_HI 0x00000914
81 #define XGMAC_MMC_RXBCFRAME_G 0x00000918
82 #define XGMAC_MMC_RXMCFRAME_G 0x00000920
83 #define XGMAC_MMC_RXCRCERR 0x00000928
84 #define XGMAC_MMC_RXRUNT 0x00000930
85 #define XGMAC_MMC_RXJABBER 0x00000934
86 #define XGMAC_MMC_RXUCFRAME_G 0x00000970
87 #define XGMAC_MMC_RXLENGTHERR 0x00000978
88 #define XGMAC_MMC_RXPAUSEFRAME 0x00000988
89 #define XGMAC_MMC_RXOVERFLOW 0x00000990
90 #define XGMAC_MMC_RXVLANFRAME 0x00000998
91 #define XGMAC_MMC_RXWATCHDOG 0x000009a0
93 /* DMA Control and Status Registers */
94 #define XGMAC_DMA_BUS_MODE 0x00000f00 /* Bus Mode */
95 #define XGMAC_DMA_TX_POLL 0x00000f04 /* Transmit Poll Demand */
96 #define XGMAC_DMA_RX_POLL 0x00000f08 /* Received Poll Demand */
97 #define XGMAC_DMA_RX_BASE_ADDR 0x00000f0c /* Receive List Base */
98 #define XGMAC_DMA_TX_BASE_ADDR 0x00000f10 /* Transmit List Base */
99 #define XGMAC_DMA_STATUS 0x00000f14 /* Status Register */
100 #define XGMAC_DMA_CONTROL 0x00000f18 /* Ctrl (Operational Mode) */
101 #define XGMAC_DMA_INTR_ENA 0x00000f1c /* Interrupt Enable */
102 #define XGMAC_DMA_MISS_FRAME_CTR 0x00000f20 /* Missed Frame Counter */
103 #define XGMAC_DMA_RI_WDOG_TIMER 0x00000f24 /* RX Intr Watchdog Timer */
104 #define XGMAC_DMA_AXI_BUS 0x00000f28 /* AXI Bus Mode */
105 #define XGMAC_DMA_AXI_STATUS 0x00000f2C /* AXI Status */
106 #define XGMAC_DMA_HW_FEATURE 0x00000f58 /* Enabled Hardware Features */
108 #define XGMAC_ADDR_AE 0x80000000
109 #define XGMAC_MAX_FILTER_ADDR 31
111 /* PMT Control and Status */
112 #define XGMAC_PMT_POINTER_RESET 0x80000000
113 #define XGMAC_PMT_GLBL_UNICAST 0x00000200
114 #define XGMAC_PMT_WAKEUP_RX_FRM 0x00000040
115 #define XGMAC_PMT_MAGIC_PKT 0x00000020
116 #define XGMAC_PMT_WAKEUP_FRM_EN 0x00000004
117 #define XGMAC_PMT_MAGIC_PKT_EN 0x00000002
118 #define XGMAC_PMT_POWERDOWN 0x00000001
120 #define XGMAC_CONTROL_SPD 0x40000000 /* Speed control */
121 #define XGMAC_CONTROL_SPD_MASK 0x60000000
122 #define XGMAC_CONTROL_SPD_1G 0x60000000
123 #define XGMAC_CONTROL_SPD_2_5G 0x40000000
124 #define XGMAC_CONTROL_SPD_10G 0x00000000
125 #define XGMAC_CONTROL_SARC 0x10000000 /* Source Addr Insert/Replace */
126 #define XGMAC_CONTROL_SARK_MASK 0x18000000
127 #define XGMAC_CONTROL_CAR 0x04000000 /* CRC Addition/Replacement */
128 #define XGMAC_CONTROL_CAR_MASK 0x06000000
129 #define XGMAC_CONTROL_DP 0x01000000 /* Disable Padding */
130 #define XGMAC_CONTROL_WD 0x00800000 /* Disable Watchdog on rx */
131 #define XGMAC_CONTROL_JD 0x00400000 /* Jabber disable */
132 #define XGMAC_CONTROL_JE 0x00100000 /* Jumbo frame */
133 #define XGMAC_CONTROL_LM 0x00001000 /* Loop-back mode */
134 #define XGMAC_CONTROL_IPC 0x00000400 /* Checksum Offload */
135 #define XGMAC_CONTROL_ACS 0x00000080 /* Automatic Pad/FCS Strip */
136 #define XGMAC_CONTROL_DDIC 0x00000010 /* Disable Deficit Idle Count */
137 #define XGMAC_CONTROL_TE 0x00000008 /* Transmitter Enable */
138 #define XGMAC_CONTROL_RE 0x00000004 /* Receiver Enable */
140 /* XGMAC Frame Filter defines */
141 #define XGMAC_FRAME_FILTER_PR 0x00000001 /* Promiscuous Mode */
142 #define XGMAC_FRAME_FILTER_HUC 0x00000002 /* Hash Unicast */
143 #define XGMAC_FRAME_FILTER_HMC 0x00000004 /* Hash Multicast */
144 #define XGMAC_FRAME_FILTER_DAIF 0x00000008 /* DA Inverse Filtering */
145 #define XGMAC_FRAME_FILTER_PM 0x00000010 /* Pass all multicast */
146 #define XGMAC_FRAME_FILTER_DBF 0x00000020 /* Disable Broadcast frames */
147 #define XGMAC_FRAME_FILTER_SAIF 0x00000100 /* Inverse Filtering */
148 #define XGMAC_FRAME_FILTER_SAF 0x00000200 /* Source Address Filter */
149 #define XGMAC_FRAME_FILTER_HPF 0x00000400 /* Hash or perfect Filter */
150 #define XGMAC_FRAME_FILTER_VHF 0x00000800 /* VLAN Hash Filter */
151 #define XGMAC_FRAME_FILTER_VPF 0x00001000 /* VLAN Perfect Filter */
152 #define XGMAC_FRAME_FILTER_RA 0x80000000 /* Receive all mode */
154 /* XGMAC FLOW CTRL defines */
155 #define XGMAC_FLOW_CTRL_PT_MASK 0xffff0000 /* Pause Time Mask */
156 #define XGMAC_FLOW_CTRL_PT_SHIFT 16
157 #define XGMAC_FLOW_CTRL_DZQP 0x00000080 /* Disable Zero-Quanta Phase */
158 #define XGMAC_FLOW_CTRL_PLT 0x00000020 /* Pause Low Threshhold */
159 #define XGMAC_FLOW_CTRL_PLT_MASK 0x00000030 /* PLT MASK */
160 #define XGMAC_FLOW_CTRL_UP 0x00000008 /* Unicast Pause Frame Detect */
161 #define XGMAC_FLOW_CTRL_RFE 0x00000004 /* Rx Flow Control Enable */
162 #define XGMAC_FLOW_CTRL_TFE 0x00000002 /* Tx Flow Control Enable */
163 #define XGMAC_FLOW_CTRL_FCB_BPA 0x00000001 /* Flow Control Busy ... */
165 /* XGMAC_INT_STAT reg */
166 #define XGMAC_INT_STAT_PMT 0x0080 /* PMT Interrupt Status */
167 #define XGMAC_INT_STAT_LPI 0x0040 /* LPI Interrupt Status */
169 /* DMA Bus Mode register defines */
170 #define DMA_BUS_MODE_SFT_RESET 0x00000001 /* Software Reset */
171 #define DMA_BUS_MODE_DSL_MASK 0x0000007c /* Descriptor Skip Length */
172 #define DMA_BUS_MODE_DSL_SHIFT 2 /* (in DWORDS) */
173 #define DMA_BUS_MODE_ATDS 0x00000080 /* Alternate Descriptor Size */
175 /* Programmable burst length */
176 #define DMA_BUS_MODE_PBL_MASK 0x00003f00 /* Programmable Burst Len */
177 #define DMA_BUS_MODE_PBL_SHIFT 8
178 #define DMA_BUS_MODE_FB 0x00010000 /* Fixed burst */
179 #define DMA_BUS_MODE_RPBL_MASK 0x003e0000 /* Rx-Programmable Burst Len */
180 #define DMA_BUS_MODE_RPBL_SHIFT 17
181 #define DMA_BUS_MODE_USP 0x00800000
182 #define DMA_BUS_MODE_8PBL 0x01000000
183 #define DMA_BUS_MODE_AAL 0x02000000
185 /* DMA Bus Mode register defines */
186 #define DMA_BUS_PR_RATIO_MASK 0x0000c000 /* Rx/Tx priority ratio */
187 #define DMA_BUS_PR_RATIO_SHIFT 14
188 #define DMA_BUS_FB 0x00010000 /* Fixed Burst */
190 /* DMA Control register defines */
191 #define DMA_CONTROL_ST 0x00002000 /* Start/Stop Transmission */
192 #define DMA_CONTROL_SR 0x00000002 /* Start/Stop Receive */
193 #define DMA_CONTROL_DFF 0x01000000 /* Disable flush of rx frames */
194 #define DMA_CONTROL_OSF 0x00000004 /* Operate on 2nd tx frame */
196 /* DMA Normal interrupt */
197 #define DMA_INTR_ENA_NIE 0x00010000 /* Normal Summary */
198 #define DMA_INTR_ENA_AIE 0x00008000 /* Abnormal Summary */
199 #define DMA_INTR_ENA_ERE 0x00004000 /* Early Receive */
200 #define DMA_INTR_ENA_FBE 0x00002000 /* Fatal Bus Error */
201 #define DMA_INTR_ENA_ETE 0x00000400 /* Early Transmit */
202 #define DMA_INTR_ENA_RWE 0x00000200 /* Receive Watchdog */
203 #define DMA_INTR_ENA_RSE 0x00000100 /* Receive Stopped */
204 #define DMA_INTR_ENA_RUE 0x00000080 /* Receive Buffer Unavailable */
205 #define DMA_INTR_ENA_RIE 0x00000040 /* Receive Interrupt */
206 #define DMA_INTR_ENA_UNE 0x00000020 /* Tx Underflow */
207 #define DMA_INTR_ENA_OVE 0x00000010 /* Receive Overflow */
208 #define DMA_INTR_ENA_TJE 0x00000008 /* Transmit Jabber */
209 #define DMA_INTR_ENA_TUE 0x00000004 /* Transmit Buffer Unavail */
210 #define DMA_INTR_ENA_TSE 0x00000002 /* Transmit Stopped */
211 #define DMA_INTR_ENA_TIE 0x00000001 /* Transmit Interrupt */
213 #define DMA_INTR_NORMAL (DMA_INTR_ENA_NIE | DMA_INTR_ENA_RIE | \
216 #define DMA_INTR_ABNORMAL (DMA_INTR_ENA_AIE | DMA_INTR_ENA_FBE | \
217 DMA_INTR_ENA_RWE | DMA_INTR_ENA_RSE | \
218 DMA_INTR_ENA_RUE | DMA_INTR_ENA_UNE | \
219 DMA_INTR_ENA_OVE | DMA_INTR_ENA_TJE | \
222 /* DMA default interrupt mask */
223 #define DMA_INTR_DEFAULT_MASK (DMA_INTR_NORMAL | DMA_INTR_ABNORMAL)
225 /* DMA Status register defines */
226 #define DMA_STATUS_GMI 0x08000000 /* MMC interrupt */
227 #define DMA_STATUS_GLI 0x04000000 /* GMAC Line interface int */
228 #define DMA_STATUS_EB_MASK 0x00380000 /* Error Bits Mask */
229 #define DMA_STATUS_EB_TX_ABORT 0x00080000 /* Error Bits - TX Abort */
230 #define DMA_STATUS_EB_RX_ABORT 0x00100000 /* Error Bits - RX Abort */
231 #define DMA_STATUS_TS_MASK 0x00700000 /* Transmit Process State */
232 #define DMA_STATUS_TS_SHIFT 20
233 #define DMA_STATUS_RS_MASK 0x000e0000 /* Receive Process State */
234 #define DMA_STATUS_RS_SHIFT 17
235 #define DMA_STATUS_NIS 0x00010000 /* Normal Interrupt Summary */
236 #define DMA_STATUS_AIS 0x00008000 /* Abnormal Interrupt Summary */
237 #define DMA_STATUS_ERI 0x00004000 /* Early Receive Interrupt */
238 #define DMA_STATUS_FBI 0x00002000 /* Fatal Bus Error Interrupt */
239 #define DMA_STATUS_ETI 0x00000400 /* Early Transmit Interrupt */
240 #define DMA_STATUS_RWT 0x00000200 /* Receive Watchdog Timeout */
241 #define DMA_STATUS_RPS 0x00000100 /* Receive Process Stopped */
242 #define DMA_STATUS_RU 0x00000080 /* Receive Buffer Unavailable */
243 #define DMA_STATUS_RI 0x00000040 /* Receive Interrupt */
244 #define DMA_STATUS_UNF 0x00000020 /* Transmit Underflow */
245 #define DMA_STATUS_OVF 0x00000010 /* Receive Overflow */
246 #define DMA_STATUS_TJT 0x00000008 /* Transmit Jabber Timeout */
247 #define DMA_STATUS_TU 0x00000004 /* Transmit Buffer Unavail */
248 #define DMA_STATUS_TPS 0x00000002 /* Transmit Process Stopped */
249 #define DMA_STATUS_TI 0x00000001 /* Transmit Interrupt */
251 /* Common MAC defines */
252 #define MAC_ENABLE_TX 0x00000008 /* Transmitter Enable */
253 #define MAC_ENABLE_RX 0x00000004 /* Receiver Enable */
255 /* XGMAC Operation Mode Register */
256 #define XGMAC_OMR_TSF 0x00200000 /* TX FIFO Store and Forward */
257 #define XGMAC_OMR_FTF 0x00100000 /* Flush Transmit FIFO */
258 #define XGMAC_OMR_TTC 0x00020000 /* Transmit Threshhold Ctrl */
259 #define XGMAC_OMR_TTC_MASK 0x00030000
260 #define XGMAC_OMR_RFD 0x00006000 /* FC Deactivation Threshhold */
261 #define XGMAC_OMR_RFD_MASK 0x00007000 /* FC Deact Threshhold MASK */
262 #define XGMAC_OMR_RFA 0x00000600 /* FC Activation Threshhold */
263 #define XGMAC_OMR_RFA_MASK 0x00000E00 /* FC Act Threshhold MASK */
264 #define XGMAC_OMR_EFC 0x00000100 /* Enable Hardware FC */
265 #define XGMAC_OMR_FEF 0x00000080 /* Forward Error Frames */
266 #define XGMAC_OMR_DT 0x00000040 /* Drop TCP/IP csum Errors */
267 #define XGMAC_OMR_RSF 0x00000020 /* RX FIFO Store and Forward */
268 #define XGMAC_OMR_RTC_256 0x00000018 /* RX Threshhold Ctrl */
269 #define XGMAC_OMR_RTC_MASK 0x00000018 /* RX Threshhold Ctrl MASK */
271 /* XGMAC HW Features Register */
272 #define DMA_HW_FEAT_TXCOESEL 0x00010000 /* TX Checksum offload */
274 #define XGMAC_MMC_CTRL_CNT_FRZ 0x00000008
276 /* XGMAC Descriptor Defines */
277 #define MAX_DESC_BUF_SZ (0x2000 - 8)
279 #define RXDESC_EXT_STATUS 0x00000001
280 #define RXDESC_CRC_ERR 0x00000002
281 #define RXDESC_RX_ERR 0x00000008
282 #define RXDESC_RX_WDOG 0x00000010
283 #define RXDESC_FRAME_TYPE 0x00000020
284 #define RXDESC_GIANT_FRAME 0x00000080
285 #define RXDESC_LAST_SEG 0x00000100
286 #define RXDESC_FIRST_SEG 0x00000200
287 #define RXDESC_VLAN_FRAME 0x00000400
288 #define RXDESC_OVERFLOW_ERR 0x00000800
289 #define RXDESC_LENGTH_ERR 0x00001000
290 #define RXDESC_SA_FILTER_FAIL 0x00002000
291 #define RXDESC_DESCRIPTOR_ERR 0x00004000
292 #define RXDESC_ERROR_SUMMARY 0x00008000
293 #define RXDESC_FRAME_LEN_OFFSET 16
294 #define RXDESC_FRAME_LEN_MASK 0x3fff0000
295 #define RXDESC_DA_FILTER_FAIL 0x40000000
297 #define RXDESC1_END_RING 0x00008000
299 #define RXDESC_IP_PAYLOAD_MASK 0x00000003
300 #define RXDESC_IP_PAYLOAD_UDP 0x00000001
301 #define RXDESC_IP_PAYLOAD_TCP 0x00000002
302 #define RXDESC_IP_PAYLOAD_ICMP 0x00000003
303 #define RXDESC_IP_HEADER_ERR 0x00000008
304 #define RXDESC_IP_PAYLOAD_ERR 0x00000010
305 #define RXDESC_IPV4_PACKET 0x00000040
306 #define RXDESC_IPV6_PACKET 0x00000080
307 #define TXDESC_UNDERFLOW_ERR 0x00000001
308 #define TXDESC_JABBER_TIMEOUT 0x00000002
309 #define TXDESC_LOCAL_FAULT 0x00000004
310 #define TXDESC_REMOTE_FAULT 0x00000008
311 #define TXDESC_VLAN_FRAME 0x00000010
312 #define TXDESC_FRAME_FLUSHED 0x00000020
313 #define TXDESC_IP_HEADER_ERR 0x00000040
314 #define TXDESC_PAYLOAD_CSUM_ERR 0x00000080
315 #define TXDESC_ERROR_SUMMARY 0x00008000
316 #define TXDESC_SA_CTRL_INSERT 0x00040000
317 #define TXDESC_SA_CTRL_REPLACE 0x00080000
318 #define TXDESC_2ND_ADDR_CHAINED 0x00100000
319 #define TXDESC_END_RING 0x00200000
320 #define TXDESC_CSUM_IP 0x00400000
321 #define TXDESC_CSUM_IP_PAYLD 0x00800000
322 #define TXDESC_CSUM_ALL 0x00C00000
323 #define TXDESC_CRC_EN_REPLACE 0x01000000
324 #define TXDESC_CRC_EN_APPEND 0x02000000
325 #define TXDESC_DISABLE_PAD 0x04000000
326 #define TXDESC_FIRST_SEG 0x10000000
327 #define TXDESC_LAST_SEG 0x20000000
328 #define TXDESC_INTERRUPT 0x40000000
330 #define DESC_OWN 0x80000000
331 #define DESC_BUFFER1_SZ_MASK 0x00001fff
332 #define DESC_BUFFER2_SZ_MASK 0x1fff0000
333 #define DESC_BUFFER2_SZ_OFFSET 16
335 struct xgmac_dma_desc {
338 __le32 buf1_addr; /* Buffer 1 Address Pointer */
339 __le32 buf2_addr; /* Buffer 2 Address Pointer */
344 struct xgmac_extra_stats {
345 /* Transmit errors */
346 unsigned long tx_jabber;
347 unsigned long tx_frame_flushed;
348 unsigned long tx_payload_error;
349 unsigned long tx_ip_header_error;
350 unsigned long tx_local_fault;
351 unsigned long tx_remote_fault;
353 unsigned long rx_watchdog;
354 unsigned long rx_da_filter_fail;
355 unsigned long rx_sa_filter_fail;
356 unsigned long rx_payload_error;
357 unsigned long rx_ip_header_error;
358 /* Tx/Rx IRQ errors */
359 unsigned long tx_undeflow;
360 unsigned long tx_process_stopped;
361 unsigned long rx_buf_unav;
362 unsigned long rx_process_stopped;
363 unsigned long tx_early;
364 unsigned long fatal_bus_error;
368 struct xgmac_dma_desc *dma_rx;
369 struct sk_buff **rx_skbuff;
370 unsigned int rx_tail;
371 unsigned int rx_head;
373 struct xgmac_dma_desc *dma_tx;
374 struct sk_buff **tx_skbuff;
375 unsigned int tx_head;
376 unsigned int tx_tail;
379 unsigned int dma_buf_sz;
380 dma_addr_t dma_rx_phy;
381 dma_addr_t dma_tx_phy;
383 struct net_device *dev;
384 struct device *device;
385 struct napi_struct napi;
387 struct xgmac_extra_stats xstats;
389 spinlock_t stats_lock;
396 /* XGMAC Configuration Settings */
398 #define PAUSE_TIME 0x400
400 #define DMA_RX_RING_SZ 256
401 #define DMA_TX_RING_SZ 128
402 /* minimum number of free TX descriptors required to wake up TX process */
403 #define TX_THRESH (DMA_TX_RING_SZ/4)
405 /* DMA descriptor ring helpers */
406 #define dma_ring_incr(n, s) (((n) + 1) & ((s) - 1))
407 #define dma_ring_space(h, t, s) CIRC_SPACE(h, t, s)
408 #define dma_ring_cnt(h, t, s) CIRC_CNT(h, t, s)
410 /* XGMAC Descriptor Access Helpers */
411 static inline void desc_set_buf_len(struct xgmac_dma_desc *p, u32 buf_sz)
413 if (buf_sz > MAX_DESC_BUF_SZ)
414 p->buf_size = cpu_to_le32(MAX_DESC_BUF_SZ |
415 (buf_sz - MAX_DESC_BUF_SZ) << DESC_BUFFER2_SZ_OFFSET);
417 p->buf_size = cpu_to_le32(buf_sz);
420 static inline int desc_get_buf_len(struct xgmac_dma_desc *p)
422 u32 len = cpu_to_le32(p->flags);
423 return (len & DESC_BUFFER1_SZ_MASK) +
424 ((len & DESC_BUFFER2_SZ_MASK) >> DESC_BUFFER2_SZ_OFFSET);
427 static inline void desc_init_rx_desc(struct xgmac_dma_desc *p, int ring_size,
430 struct xgmac_dma_desc *end = p + ring_size - 1;
432 memset(p, 0, sizeof(*p) * ring_size);
434 for (; p <= end; p++)
435 desc_set_buf_len(p, buf_sz);
437 end->buf_size |= cpu_to_le32(RXDESC1_END_RING);
440 static inline void desc_init_tx_desc(struct xgmac_dma_desc *p, u32 ring_size)
442 memset(p, 0, sizeof(*p) * ring_size);
443 p[ring_size - 1].flags = cpu_to_le32(TXDESC_END_RING);
446 static inline int desc_get_owner(struct xgmac_dma_desc *p)
448 return le32_to_cpu(p->flags) & DESC_OWN;
451 static inline void desc_set_rx_owner(struct xgmac_dma_desc *p)
453 /* Clear all fields and set the owner */
454 p->flags = cpu_to_le32(DESC_OWN);
457 static inline void desc_set_tx_owner(struct xgmac_dma_desc *p, u32 flags)
459 u32 tmpflags = le32_to_cpu(p->flags);
460 tmpflags &= TXDESC_END_RING;
461 tmpflags |= flags | DESC_OWN;
462 p->flags = cpu_to_le32(tmpflags);
465 static inline int desc_get_tx_ls(struct xgmac_dma_desc *p)
467 return le32_to_cpu(p->flags) & TXDESC_LAST_SEG;
470 static inline u32 desc_get_buf_addr(struct xgmac_dma_desc *p)
472 return le32_to_cpu(p->buf1_addr);
475 static inline void desc_set_buf_addr(struct xgmac_dma_desc *p,
478 p->buf1_addr = cpu_to_le32(paddr);
479 if (len > MAX_DESC_BUF_SZ)
480 p->buf2_addr = cpu_to_le32(paddr + MAX_DESC_BUF_SZ);
483 static inline void desc_set_buf_addr_and_size(struct xgmac_dma_desc *p,
486 desc_set_buf_len(p, len);
487 desc_set_buf_addr(p, paddr, len);
490 static inline int desc_get_rx_frame_len(struct xgmac_dma_desc *p)
492 u32 data = le32_to_cpu(p->flags);
493 u32 len = (data & RXDESC_FRAME_LEN_MASK) >> RXDESC_FRAME_LEN_OFFSET;
494 if (data & RXDESC_FRAME_TYPE)
500 static void xgmac_dma_flush_tx_fifo(void __iomem *ioaddr)
503 u32 reg = readl(ioaddr + XGMAC_OMR);
504 writel(reg | XGMAC_OMR_FTF, ioaddr + XGMAC_OMR);
506 while ((timeout-- > 0) && readl(ioaddr + XGMAC_OMR) & XGMAC_OMR_FTF)
510 static int desc_get_tx_status(struct xgmac_priv *priv, struct xgmac_dma_desc *p)
512 struct xgmac_extra_stats *x = &priv->xstats;
513 u32 status = le32_to_cpu(p->flags);
515 if (!(status & TXDESC_ERROR_SUMMARY))
518 netdev_dbg(priv->dev, "tx desc error = 0x%08x\n", status);
519 if (status & TXDESC_JABBER_TIMEOUT)
521 if (status & TXDESC_FRAME_FLUSHED)
522 x->tx_frame_flushed++;
523 if (status & TXDESC_UNDERFLOW_ERR)
524 xgmac_dma_flush_tx_fifo(priv->base);
525 if (status & TXDESC_IP_HEADER_ERR)
526 x->tx_ip_header_error++;
527 if (status & TXDESC_LOCAL_FAULT)
529 if (status & TXDESC_REMOTE_FAULT)
530 x->tx_remote_fault++;
531 if (status & TXDESC_PAYLOAD_CSUM_ERR)
532 x->tx_payload_error++;
537 static int desc_get_rx_status(struct xgmac_priv *priv, struct xgmac_dma_desc *p)
539 struct xgmac_extra_stats *x = &priv->xstats;
540 int ret = CHECKSUM_UNNECESSARY;
541 u32 status = le32_to_cpu(p->flags);
542 u32 ext_status = le32_to_cpu(p->ext_status);
544 if (status & RXDESC_DA_FILTER_FAIL) {
545 netdev_dbg(priv->dev, "XGMAC RX : Dest Address filter fail\n");
546 x->rx_da_filter_fail++;
550 /* Check if packet has checksum already */
551 if ((status & RXDESC_FRAME_TYPE) && (status & RXDESC_EXT_STATUS) &&
552 !(ext_status & RXDESC_IP_PAYLOAD_MASK))
555 netdev_dbg(priv->dev, "rx status - frame type=%d, csum = %d, ext stat %08x\n",
556 (status & RXDESC_FRAME_TYPE) ? 1 : 0, ret, ext_status);
558 if (!(status & RXDESC_ERROR_SUMMARY))
561 /* Handle any errors */
562 if (status & (RXDESC_DESCRIPTOR_ERR | RXDESC_OVERFLOW_ERR |
563 RXDESC_GIANT_FRAME | RXDESC_LENGTH_ERR | RXDESC_CRC_ERR))
566 if (status & RXDESC_EXT_STATUS) {
567 if (ext_status & RXDESC_IP_HEADER_ERR)
568 x->rx_ip_header_error++;
569 if (ext_status & RXDESC_IP_PAYLOAD_ERR)
570 x->rx_payload_error++;
571 netdev_dbg(priv->dev, "IP checksum error - stat %08x\n",
573 return CHECKSUM_NONE;
579 static inline void xgmac_mac_enable(void __iomem *ioaddr)
581 u32 value = readl(ioaddr + XGMAC_CONTROL);
582 value |= MAC_ENABLE_RX | MAC_ENABLE_TX;
583 writel(value, ioaddr + XGMAC_CONTROL);
585 value = readl(ioaddr + XGMAC_DMA_CONTROL);
586 value |= DMA_CONTROL_ST | DMA_CONTROL_SR;
587 writel(value, ioaddr + XGMAC_DMA_CONTROL);
590 static inline void xgmac_mac_disable(void __iomem *ioaddr)
592 u32 value = readl(ioaddr + XGMAC_DMA_CONTROL);
593 value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR);
594 writel(value, ioaddr + XGMAC_DMA_CONTROL);
596 value = readl(ioaddr + XGMAC_CONTROL);
597 value &= ~(MAC_ENABLE_TX | MAC_ENABLE_RX);
598 writel(value, ioaddr + XGMAC_CONTROL);
601 static void xgmac_set_mac_addr(void __iomem *ioaddr, unsigned char *addr,
606 data = (addr[5] << 8) | addr[4] | (num ? XGMAC_ADDR_AE : 0);
607 writel(data, ioaddr + XGMAC_ADDR_HIGH(num));
608 data = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0];
609 writel(data, ioaddr + XGMAC_ADDR_LOW(num));
612 static void xgmac_get_mac_addr(void __iomem *ioaddr, unsigned char *addr,
615 u32 hi_addr, lo_addr;
617 /* Read the MAC address from the hardware */
618 hi_addr = readl(ioaddr + XGMAC_ADDR_HIGH(num));
619 lo_addr = readl(ioaddr + XGMAC_ADDR_LOW(num));
621 /* Extract the MAC address from the high and low words */
622 addr[0] = lo_addr & 0xff;
623 addr[1] = (lo_addr >> 8) & 0xff;
624 addr[2] = (lo_addr >> 16) & 0xff;
625 addr[3] = (lo_addr >> 24) & 0xff;
626 addr[4] = hi_addr & 0xff;
627 addr[5] = (hi_addr >> 8) & 0xff;
630 static int xgmac_set_flow_ctrl(struct xgmac_priv *priv, int rx, int tx)
633 unsigned int flow = 0;
640 flow |= XGMAC_FLOW_CTRL_RFE;
642 flow |= XGMAC_FLOW_CTRL_TFE;
644 flow |= XGMAC_FLOW_CTRL_PLT | XGMAC_FLOW_CTRL_UP;
645 flow |= (PAUSE_TIME << XGMAC_FLOW_CTRL_PT_SHIFT);
647 writel(flow, priv->base + XGMAC_FLOW_CTRL);
649 reg = readl(priv->base + XGMAC_OMR);
650 reg |= XGMAC_OMR_EFC;
651 writel(reg, priv->base + XGMAC_OMR);
653 writel(0, priv->base + XGMAC_FLOW_CTRL);
655 reg = readl(priv->base + XGMAC_OMR);
656 reg &= ~XGMAC_OMR_EFC;
657 writel(reg, priv->base + XGMAC_OMR);
663 static void xgmac_rx_refill(struct xgmac_priv *priv)
665 struct xgmac_dma_desc *p;
668 while (dma_ring_space(priv->rx_head, priv->rx_tail, DMA_RX_RING_SZ) > 1) {
669 int entry = priv->rx_head;
672 p = priv->dma_rx + entry;
674 if (priv->rx_skbuff[entry] == NULL) {
675 skb = netdev_alloc_skb(priv->dev, priv->dma_buf_sz);
676 if (unlikely(skb == NULL))
679 priv->rx_skbuff[entry] = skb;
680 paddr = dma_map_single(priv->device, skb->data,
681 priv->dma_buf_sz, DMA_FROM_DEVICE);
682 desc_set_buf_addr(p, paddr, priv->dma_buf_sz);
685 netdev_dbg(priv->dev, "rx ring: head %d, tail %d\n",
686 priv->rx_head, priv->rx_tail);
688 priv->rx_head = dma_ring_incr(priv->rx_head, DMA_RX_RING_SZ);
689 desc_set_rx_owner(p);
694 * init_xgmac_dma_desc_rings - init the RX/TX descriptor rings
695 * @dev: net device structure
696 * Description: this function initializes the DMA RX/TX descriptors
697 * and allocates the socket buffers.
699 static int xgmac_dma_desc_rings_init(struct net_device *dev)
701 struct xgmac_priv *priv = netdev_priv(dev);
704 /* Set the Buffer size according to the MTU;
705 * indeed, in case of jumbo we need to bump-up the buffer sizes.
707 bfsize = ALIGN(dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN + 64,
710 netdev_dbg(priv->dev, "mtu [%d] bfsize [%d]\n", dev->mtu, bfsize);
712 priv->rx_skbuff = kzalloc(sizeof(struct sk_buff *) * DMA_RX_RING_SZ,
714 if (!priv->rx_skbuff)
717 priv->dma_rx = dma_alloc_coherent(priv->device,
719 sizeof(struct xgmac_dma_desc),
725 priv->tx_skbuff = kzalloc(sizeof(struct sk_buff *) * DMA_TX_RING_SZ,
727 if (!priv->tx_skbuff)
730 priv->dma_tx = dma_alloc_coherent(priv->device,
732 sizeof(struct xgmac_dma_desc),
738 netdev_dbg(priv->dev, "DMA desc rings: virt addr (Rx %p, "
739 "Tx %p)\n\tDMA phy addr (Rx 0x%08x, Tx 0x%08x)\n",
740 priv->dma_rx, priv->dma_tx,
741 (unsigned int)priv->dma_rx_phy, (unsigned int)priv->dma_tx_phy);
745 priv->dma_buf_sz = bfsize;
746 desc_init_rx_desc(priv->dma_rx, DMA_RX_RING_SZ, priv->dma_buf_sz);
747 xgmac_rx_refill(priv);
751 desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ);
753 writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR);
754 writel(priv->dma_rx_phy, priv->base + XGMAC_DMA_RX_BASE_ADDR);
759 kfree(priv->tx_skbuff);
761 dma_free_coherent(priv->device,
762 DMA_RX_RING_SZ * sizeof(struct xgmac_dma_desc),
763 priv->dma_rx, priv->dma_rx_phy);
765 kfree(priv->rx_skbuff);
769 static void xgmac_free_rx_skbufs(struct xgmac_priv *priv)
772 struct xgmac_dma_desc *p;
774 if (!priv->rx_skbuff)
777 for (i = 0; i < DMA_RX_RING_SZ; i++) {
778 if (priv->rx_skbuff[i] == NULL)
781 p = priv->dma_rx + i;
782 dma_unmap_single(priv->device, desc_get_buf_addr(p),
783 priv->dma_buf_sz, DMA_FROM_DEVICE);
784 dev_kfree_skb_any(priv->rx_skbuff[i]);
785 priv->rx_skbuff[i] = NULL;
789 static void xgmac_free_tx_skbufs(struct xgmac_priv *priv)
792 struct xgmac_dma_desc *p;
794 if (!priv->tx_skbuff)
797 for (i = 0; i < DMA_TX_RING_SZ; i++) {
798 if (priv->tx_skbuff[i] == NULL)
801 p = priv->dma_tx + i;
802 dma_unmap_single(priv->device, desc_get_buf_addr(p),
803 desc_get_buf_len(p), DMA_TO_DEVICE);
805 for (f = 0; f < skb_shinfo(priv->tx_skbuff[i])->nr_frags; f++) {
806 p = priv->dma_tx + i++;
807 dma_unmap_page(priv->device, desc_get_buf_addr(p),
808 desc_get_buf_len(p), DMA_TO_DEVICE);
811 dev_kfree_skb_any(priv->tx_skbuff[i]);
812 priv->tx_skbuff[i] = NULL;
816 static void xgmac_free_dma_desc_rings(struct xgmac_priv *priv)
818 /* Release the DMA TX/RX socket buffers */
819 xgmac_free_rx_skbufs(priv);
820 xgmac_free_tx_skbufs(priv);
822 /* Free the consistent memory allocated for descriptor rings */
824 dma_free_coherent(priv->device,
825 DMA_TX_RING_SZ * sizeof(struct xgmac_dma_desc),
826 priv->dma_tx, priv->dma_tx_phy);
830 dma_free_coherent(priv->device,
831 DMA_RX_RING_SZ * sizeof(struct xgmac_dma_desc),
832 priv->dma_rx, priv->dma_rx_phy);
835 kfree(priv->rx_skbuff);
836 priv->rx_skbuff = NULL;
837 kfree(priv->tx_skbuff);
838 priv->tx_skbuff = NULL;
843 * @priv: private driver structure
844 * Description: it reclaims resources after transmission completes.
846 static void xgmac_tx_complete(struct xgmac_priv *priv)
849 void __iomem *ioaddr = priv->base;
851 writel(DMA_STATUS_TU | DMA_STATUS_NIS, ioaddr + XGMAC_DMA_STATUS);
853 while (dma_ring_cnt(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ)) {
854 unsigned int entry = priv->tx_tail;
855 struct sk_buff *skb = priv->tx_skbuff[entry];
856 struct xgmac_dma_desc *p = priv->dma_tx + entry;
858 /* Check if the descriptor is owned by the DMA. */
859 if (desc_get_owner(p))
862 /* Verify tx error by looking at the last segment */
863 if (desc_get_tx_ls(p))
864 desc_get_tx_status(priv, p);
866 netdev_dbg(priv->dev, "tx ring: curr %d, dirty %d\n",
867 priv->tx_head, priv->tx_tail);
869 dma_unmap_single(priv->device, desc_get_buf_addr(p),
870 desc_get_buf_len(p), DMA_TO_DEVICE);
872 priv->tx_skbuff[entry] = NULL;
873 priv->tx_tail = dma_ring_incr(entry, DMA_TX_RING_SZ);
879 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
880 entry = priv->tx_tail = dma_ring_incr(priv->tx_tail,
882 p = priv->dma_tx + priv->tx_tail;
884 dma_unmap_page(priv->device, desc_get_buf_addr(p),
885 desc_get_buf_len(p), DMA_TO_DEVICE);
891 if (dma_ring_space(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ) >
893 netif_wake_queue(priv->dev);
898 * @priv: pointer to the private device structure
899 * Description: it cleans the descriptors and restarts the transmission
902 static void xgmac_tx_err(struct xgmac_priv *priv)
904 u32 reg, value, inten;
906 netif_stop_queue(priv->dev);
908 inten = readl(priv->base + XGMAC_DMA_INTR_ENA);
909 writel(0, priv->base + XGMAC_DMA_INTR_ENA);
911 reg = readl(priv->base + XGMAC_DMA_CONTROL);
912 writel(reg & ~DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL);
914 value = readl(priv->base + XGMAC_DMA_STATUS) & 0x700000;
915 } while (value && (value != 0x600000));
917 xgmac_free_tx_skbufs(priv);
918 desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ);
921 writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR);
922 writel(reg | DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL);
924 writel(DMA_STATUS_TU | DMA_STATUS_TPS | DMA_STATUS_NIS | DMA_STATUS_AIS,
925 priv->base + XGMAC_DMA_STATUS);
926 writel(inten, priv->base + XGMAC_DMA_INTR_ENA);
928 netif_wake_queue(priv->dev);
931 static int xgmac_hw_init(struct net_device *dev)
935 struct xgmac_priv *priv = netdev_priv(dev);
936 void __iomem *ioaddr = priv->base;
938 /* Save the ctrl register value */
939 ctrl = readl(ioaddr + XGMAC_CONTROL) & XGMAC_CONTROL_SPD_MASK;
942 value = DMA_BUS_MODE_SFT_RESET;
943 writel(value, ioaddr + XGMAC_DMA_BUS_MODE);
946 (readl(ioaddr + XGMAC_DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET))
951 value = (0x10 << DMA_BUS_MODE_PBL_SHIFT) |
952 (0x10 << DMA_BUS_MODE_RPBL_SHIFT) |
953 DMA_BUS_MODE_FB | DMA_BUS_MODE_ATDS | DMA_BUS_MODE_AAL;
954 writel(value, ioaddr + XGMAC_DMA_BUS_MODE);
956 /* Enable interrupts */
957 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS);
958 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA);
960 /* XGMAC requires AXI bus init. This is a 'magic number' for now */
961 writel(0x0077000E, ioaddr + XGMAC_DMA_AXI_BUS);
963 ctrl |= XGMAC_CONTROL_DDIC | XGMAC_CONTROL_JE | XGMAC_CONTROL_ACS |
965 if (dev->features & NETIF_F_RXCSUM)
966 ctrl |= XGMAC_CONTROL_IPC;
967 writel(ctrl, ioaddr + XGMAC_CONTROL);
969 writel(DMA_CONTROL_OSF, ioaddr + XGMAC_DMA_CONTROL);
971 /* Set the HW DMA mode and the COE */
972 writel(XGMAC_OMR_TSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA |
976 /* Reset the MMC counters */
977 writel(1, ioaddr + XGMAC_MMC_CTRL);
982 * xgmac_open - open entry point of the driver
983 * @dev : pointer to the device structure.
985 * This function is the open entry point of the driver.
987 * 0 on success and an appropriate (-)ve integer as defined in errno.h
990 static int xgmac_open(struct net_device *dev)
993 struct xgmac_priv *priv = netdev_priv(dev);
994 void __iomem *ioaddr = priv->base;
996 /* Check that the MAC address is valid. If its not, refuse
997 * to bring the device up. The user must specify an
998 * address using the following linux command:
999 * ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx */
1000 if (!is_valid_ether_addr(dev->dev_addr)) {
1001 eth_hw_addr_random(dev);
1002 netdev_dbg(priv->dev, "generated random MAC address %pM\n",
1006 memset(&priv->xstats, 0, sizeof(struct xgmac_extra_stats));
1008 /* Initialize the XGMAC and descriptors */
1010 xgmac_set_mac_addr(ioaddr, dev->dev_addr, 0);
1011 xgmac_set_flow_ctrl(priv, priv->rx_pause, priv->tx_pause);
1013 ret = xgmac_dma_desc_rings_init(dev);
1017 /* Enable the MAC Rx/Tx */
1018 xgmac_mac_enable(ioaddr);
1020 napi_enable(&priv->napi);
1021 netif_start_queue(dev);
1027 * xgmac_release - close entry point of the driver
1028 * @dev : device pointer.
1030 * This is the stop entry point of the driver.
1032 static int xgmac_stop(struct net_device *dev)
1034 struct xgmac_priv *priv = netdev_priv(dev);
1036 netif_stop_queue(dev);
1038 if (readl(priv->base + XGMAC_DMA_INTR_ENA))
1039 napi_disable(&priv->napi);
1041 writel(0, priv->base + XGMAC_DMA_INTR_ENA);
1043 /* Disable the MAC core */
1044 xgmac_mac_disable(priv->base);
1046 /* Release and free the Rx/Tx resources */
1047 xgmac_free_dma_desc_rings(priv);
1054 * @skb : the socket buffer
1055 * @dev : device pointer
1056 * Description : Tx entry point of the driver.
1058 static netdev_tx_t xgmac_xmit(struct sk_buff *skb, struct net_device *dev)
1060 struct xgmac_priv *priv = netdev_priv(dev);
1063 int nfrags = skb_shinfo(skb)->nr_frags;
1064 struct xgmac_dma_desc *desc, *first;
1065 unsigned int desc_flags;
1069 if (dma_ring_space(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ) <
1071 writel(DMA_INTR_DEFAULT_MASK | DMA_INTR_ENA_TIE,
1072 priv->base + XGMAC_DMA_INTR_ENA);
1073 netif_stop_queue(dev);
1074 return NETDEV_TX_BUSY;
1077 desc_flags = (skb->ip_summed == CHECKSUM_PARTIAL) ?
1078 TXDESC_CSUM_ALL : 0;
1079 entry = priv->tx_head;
1080 desc = priv->dma_tx + entry;
1083 len = skb_headlen(skb);
1084 paddr = dma_map_single(priv->device, skb->data, len, DMA_TO_DEVICE);
1085 if (dma_mapping_error(priv->device, paddr)) {
1089 priv->tx_skbuff[entry] = skb;
1090 desc_set_buf_addr_and_size(desc, paddr, len);
1092 for (i = 0; i < nfrags; i++) {
1093 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1097 paddr = skb_frag_dma_map(priv->device, frag, 0, len,
1099 if (dma_mapping_error(priv->device, paddr)) {
1104 entry = dma_ring_incr(entry, DMA_TX_RING_SZ);
1105 desc = priv->dma_tx + entry;
1106 priv->tx_skbuff[entry] = NULL;
1108 desc_set_buf_addr_and_size(desc, paddr, len);
1109 if (i < (nfrags - 1))
1110 desc_set_tx_owner(desc, desc_flags);
1113 /* Interrupt on completition only for the latest segment */
1115 desc_set_tx_owner(desc, desc_flags |
1116 TXDESC_LAST_SEG | TXDESC_INTERRUPT);
1118 desc_flags |= TXDESC_LAST_SEG | TXDESC_INTERRUPT;
1120 /* Set owner on first desc last to avoid race condition */
1122 desc_set_tx_owner(first, desc_flags | TXDESC_FIRST_SEG);
1124 priv->tx_head = dma_ring_incr(entry, DMA_TX_RING_SZ);
1126 writel(1, priv->base + XGMAC_DMA_TX_POLL);
1128 return NETDEV_TX_OK;
1131 static int xgmac_rx(struct xgmac_priv *priv, int limit)
1134 unsigned int count = 0;
1135 struct xgmac_dma_desc *p;
1137 while (count < limit) {
1139 struct sk_buff *skb;
1142 writel(DMA_STATUS_RI | DMA_STATUS_NIS,
1143 priv->base + XGMAC_DMA_STATUS);
1145 entry = priv->rx_tail;
1146 p = priv->dma_rx + entry;
1147 if (desc_get_owner(p))
1151 priv->rx_tail = dma_ring_incr(priv->rx_tail, DMA_RX_RING_SZ);
1153 /* read the status of the incoming frame */
1154 ip_checksum = desc_get_rx_status(priv, p);
1155 if (ip_checksum < 0)
1158 skb = priv->rx_skbuff[entry];
1159 if (unlikely(!skb)) {
1160 netdev_err(priv->dev, "Inconsistent Rx descriptor chain\n");
1163 priv->rx_skbuff[entry] = NULL;
1165 frame_len = desc_get_rx_frame_len(p);
1166 netdev_dbg(priv->dev, "RX frame size %d, COE status: %d\n",
1167 frame_len, ip_checksum);
1169 skb_put(skb, frame_len);
1170 dma_unmap_single(priv->device, desc_get_buf_addr(p),
1171 frame_len, DMA_FROM_DEVICE);
1173 skb->protocol = eth_type_trans(skb, priv->dev);
1174 skb->ip_summed = ip_checksum;
1175 if (ip_checksum == CHECKSUM_NONE)
1176 netif_receive_skb(skb);
1178 napi_gro_receive(&priv->napi, skb);
1181 xgmac_rx_refill(priv);
1187 * xgmac_poll - xgmac poll method (NAPI)
1188 * @napi : pointer to the napi structure.
1189 * @budget : maximum number of packets that the current CPU can receive from
1192 * This function implements the the reception process.
1193 * Also it runs the TX completion thread
1195 static int xgmac_poll(struct napi_struct *napi, int budget)
1197 struct xgmac_priv *priv = container_of(napi,
1198 struct xgmac_priv, napi);
1201 xgmac_tx_complete(priv);
1202 work_done = xgmac_rx(priv, budget);
1204 if (work_done < budget) {
1205 napi_complete(napi);
1206 writel(DMA_INTR_DEFAULT_MASK, priv->base + XGMAC_DMA_INTR_ENA);
1213 * @dev : Pointer to net device structure
1214 * Description: this function is called when a packet transmission fails to
1215 * complete within a reasonable tmrate. The driver will mark the error in the
1216 * netdev structure and arrange for the device to be reset to a sane state
1217 * in order to transmit a new packet.
1219 static void xgmac_tx_timeout(struct net_device *dev)
1221 struct xgmac_priv *priv = netdev_priv(dev);
1223 /* Clear Tx resources and restart transmitting again */
1228 * xgmac_set_rx_mode - entry point for multicast addressing
1229 * @dev : pointer to the device structure
1231 * This function is a driver entry point which gets called by the kernel
1232 * whenever multicast addresses must be enabled/disabled.
1236 static void xgmac_set_rx_mode(struct net_device *dev)
1239 struct xgmac_priv *priv = netdev_priv(dev);
1240 void __iomem *ioaddr = priv->base;
1241 unsigned int value = 0;
1242 u32 hash_filter[XGMAC_NUM_HASH];
1244 struct netdev_hw_addr *ha;
1245 bool use_hash = false;
1247 netdev_dbg(priv->dev, "# mcasts %d, # unicast %d\n",
1248 netdev_mc_count(dev), netdev_uc_count(dev));
1250 if (dev->flags & IFF_PROMISC) {
1251 writel(XGMAC_FRAME_FILTER_PR, ioaddr + XGMAC_FRAME_FILTER);
1255 memset(hash_filter, 0, sizeof(hash_filter));
1257 if (netdev_uc_count(dev) > XGMAC_MAX_FILTER_ADDR) {
1259 value |= XGMAC_FRAME_FILTER_HUC | XGMAC_FRAME_FILTER_HPF;
1261 netdev_for_each_uc_addr(ha, dev) {
1263 u32 bit_nr = ~ether_crc(ETH_ALEN, ha->addr) >> 23;
1265 /* The most significant 4 bits determine the register to
1266 * use (H/L) while the other 5 bits determine the bit
1267 * within the register. */
1268 hash_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
1270 xgmac_set_mac_addr(ioaddr, ha->addr, reg);
1275 if (dev->flags & IFF_ALLMULTI) {
1276 value |= XGMAC_FRAME_FILTER_PM;
1280 if ((netdev_mc_count(dev) + reg - 1) > XGMAC_MAX_FILTER_ADDR) {
1282 value |= XGMAC_FRAME_FILTER_HMC | XGMAC_FRAME_FILTER_HPF;
1284 netdev_for_each_mc_addr(ha, dev) {
1286 u32 bit_nr = ~ether_crc(ETH_ALEN, ha->addr) >> 23;
1288 /* The most significant 4 bits determine the register to
1289 * use (H/L) while the other 5 bits determine the bit
1290 * within the register. */
1291 hash_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
1293 xgmac_set_mac_addr(ioaddr, ha->addr, reg);
1299 for (i = 0; i < XGMAC_NUM_HASH; i++)
1300 writel(hash_filter[i], ioaddr + XGMAC_HASH(i));
1302 writel(value, ioaddr + XGMAC_FRAME_FILTER);
1306 * xgmac_change_mtu - entry point to change MTU size for the device.
1307 * @dev : device pointer.
1308 * @new_mtu : the new MTU size for the device.
1309 * Description: the Maximum Transfer Unit (MTU) is used by the network layer
1310 * to drive packet transmission. Ethernet has an MTU of 1500 octets
1311 * (ETH_DATA_LEN). This value can be changed with ifconfig.
1313 * 0 on success and an appropriate (-)ve integer as defined in errno.h
1316 static int xgmac_change_mtu(struct net_device *dev, int new_mtu)
1318 struct xgmac_priv *priv = netdev_priv(dev);
1321 if ((new_mtu < 46) || (new_mtu > MAX_MTU)) {
1322 netdev_err(priv->dev, "invalid MTU, max MTU is: %d\n", MAX_MTU);
1329 /* return early if the buffer sizes will not change */
1330 if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN)
1332 if (old_mtu == new_mtu)
1335 /* Stop everything, get ready to change the MTU */
1336 if (!netif_running(dev))
1339 /* Bring the interface down and then back up */
1341 return xgmac_open(dev);
1344 static irqreturn_t xgmac_pmt_interrupt(int irq, void *dev_id)
1347 struct net_device *dev = (struct net_device *)dev_id;
1348 struct xgmac_priv *priv = netdev_priv(dev);
1349 void __iomem *ioaddr = priv->base;
1351 intr_status = readl(ioaddr + XGMAC_INT_STAT);
1352 if (intr_status & XGMAC_INT_STAT_PMT) {
1353 netdev_dbg(priv->dev, "received Magic frame\n");
1354 /* clear the PMT bits 5 and 6 by reading the PMT */
1355 readl(ioaddr + XGMAC_PMT);
1360 static irqreturn_t xgmac_interrupt(int irq, void *dev_id)
1363 bool tx_err = false;
1364 struct net_device *dev = (struct net_device *)dev_id;
1365 struct xgmac_priv *priv = netdev_priv(dev);
1366 struct xgmac_extra_stats *x = &priv->xstats;
1368 /* read the status register (CSR5) */
1369 intr_status = readl(priv->base + XGMAC_DMA_STATUS);
1370 intr_status &= readl(priv->base + XGMAC_DMA_INTR_ENA);
1371 writel(intr_status, priv->base + XGMAC_DMA_STATUS);
1373 /* It displays the DMA process states (CSR5 register) */
1374 /* ABNORMAL interrupts */
1375 if (unlikely(intr_status & DMA_STATUS_AIS)) {
1376 if (intr_status & DMA_STATUS_TJT) {
1377 netdev_err(priv->dev, "transmit jabber\n");
1380 if (intr_status & DMA_STATUS_RU)
1382 if (intr_status & DMA_STATUS_RPS) {
1383 netdev_err(priv->dev, "receive process stopped\n");
1384 x->rx_process_stopped++;
1386 if (intr_status & DMA_STATUS_ETI) {
1387 netdev_err(priv->dev, "transmit early interrupt\n");
1390 if (intr_status & DMA_STATUS_TPS) {
1391 netdev_err(priv->dev, "transmit process stopped\n");
1392 x->tx_process_stopped++;
1395 if (intr_status & DMA_STATUS_FBI) {
1396 netdev_err(priv->dev, "fatal bus error\n");
1397 x->fatal_bus_error++;
1405 /* TX/RX NORMAL interrupts */
1406 if (intr_status & (DMA_STATUS_RI | DMA_STATUS_TU)) {
1407 writel(DMA_INTR_ABNORMAL, priv->base + XGMAC_DMA_INTR_ENA);
1408 napi_schedule(&priv->napi);
1414 #ifdef CONFIG_NET_POLL_CONTROLLER
1415 /* Polling receive - used by NETCONSOLE and other diagnostic tools
1416 * to allow network I/O with interrupts disabled. */
1417 static void xgmac_poll_controller(struct net_device *dev)
1419 disable_irq(dev->irq);
1420 xgmac_interrupt(dev->irq, dev);
1421 enable_irq(dev->irq);
1425 static struct rtnl_link_stats64 *
1426 xgmac_get_stats64(struct net_device *dev,
1427 struct rtnl_link_stats64 *storage)
1429 struct xgmac_priv *priv = netdev_priv(dev);
1430 void __iomem *base = priv->base;
1433 spin_lock_bh(&priv->stats_lock);
1434 writel(XGMAC_MMC_CTRL_CNT_FRZ, base + XGMAC_MMC_CTRL);
1436 storage->rx_bytes = readl(base + XGMAC_MMC_RXOCTET_G_LO);
1437 storage->rx_bytes |= (u64)(readl(base + XGMAC_MMC_RXOCTET_G_HI)) << 32;
1439 storage->rx_packets = readl(base + XGMAC_MMC_RXFRAME_GB_LO);
1440 storage->multicast = readl(base + XGMAC_MMC_RXMCFRAME_G);
1441 storage->rx_crc_errors = readl(base + XGMAC_MMC_RXCRCERR);
1442 storage->rx_length_errors = readl(base + XGMAC_MMC_RXLENGTHERR);
1443 storage->rx_missed_errors = readl(base + XGMAC_MMC_RXOVERFLOW);
1445 storage->tx_bytes = readl(base + XGMAC_MMC_TXOCTET_G_LO);
1446 storage->tx_bytes |= (u64)(readl(base + XGMAC_MMC_TXOCTET_G_HI)) << 32;
1448 count = readl(base + XGMAC_MMC_TXFRAME_GB_LO);
1449 storage->tx_errors = count - readl(base + XGMAC_MMC_TXFRAME_G_LO);
1450 storage->tx_packets = count;
1451 storage->tx_fifo_errors = readl(base + XGMAC_MMC_TXUNDERFLOW);
1453 writel(0, base + XGMAC_MMC_CTRL);
1454 spin_unlock_bh(&priv->stats_lock);
1458 static int xgmac_set_mac_address(struct net_device *dev, void *p)
1460 struct xgmac_priv *priv = netdev_priv(dev);
1461 void __iomem *ioaddr = priv->base;
1462 struct sockaddr *addr = p;
1464 if (!is_valid_ether_addr(addr->sa_data))
1465 return -EADDRNOTAVAIL;
1467 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1468 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1470 xgmac_set_mac_addr(ioaddr, dev->dev_addr, 0);
1475 static int xgmac_set_features(struct net_device *dev, netdev_features_t features)
1478 struct xgmac_priv *priv = netdev_priv(dev);
1479 void __iomem *ioaddr = priv->base;
1480 u32 changed = dev->features ^ features;
1482 if (!(changed & NETIF_F_RXCSUM))
1485 ctrl = readl(ioaddr + XGMAC_CONTROL);
1486 if (features & NETIF_F_RXCSUM)
1487 ctrl |= XGMAC_CONTROL_IPC;
1489 ctrl &= ~XGMAC_CONTROL_IPC;
1490 writel(ctrl, ioaddr + XGMAC_CONTROL);
1495 static const struct net_device_ops xgmac_netdev_ops = {
1496 .ndo_open = xgmac_open,
1497 .ndo_start_xmit = xgmac_xmit,
1498 .ndo_stop = xgmac_stop,
1499 .ndo_change_mtu = xgmac_change_mtu,
1500 .ndo_set_rx_mode = xgmac_set_rx_mode,
1501 .ndo_tx_timeout = xgmac_tx_timeout,
1502 .ndo_get_stats64 = xgmac_get_stats64,
1503 #ifdef CONFIG_NET_POLL_CONTROLLER
1504 .ndo_poll_controller = xgmac_poll_controller,
1506 .ndo_set_mac_address = xgmac_set_mac_address,
1507 .ndo_set_features = xgmac_set_features,
1510 static int xgmac_ethtool_getsettings(struct net_device *dev,
1511 struct ethtool_cmd *cmd)
1514 cmd->duplex = DUPLEX_FULL;
1515 ethtool_cmd_speed_set(cmd, 10000);
1517 cmd->advertising = 0;
1518 cmd->transceiver = XCVR_INTERNAL;
1522 static void xgmac_get_pauseparam(struct net_device *netdev,
1523 struct ethtool_pauseparam *pause)
1525 struct xgmac_priv *priv = netdev_priv(netdev);
1527 pause->rx_pause = priv->rx_pause;
1528 pause->tx_pause = priv->tx_pause;
1531 static int xgmac_set_pauseparam(struct net_device *netdev,
1532 struct ethtool_pauseparam *pause)
1534 struct xgmac_priv *priv = netdev_priv(netdev);
1539 return xgmac_set_flow_ctrl(priv, pause->rx_pause, pause->tx_pause);
1542 struct xgmac_stats {
1543 char stat_string[ETH_GSTRING_LEN];
1548 #define XGMAC_STAT(m) \
1549 { #m, offsetof(struct xgmac_priv, xstats.m), false }
1550 #define XGMAC_HW_STAT(m, reg_offset) \
1551 { #m, reg_offset, true }
1553 static const struct xgmac_stats xgmac_gstrings_stats[] = {
1554 XGMAC_STAT(tx_frame_flushed),
1555 XGMAC_STAT(tx_payload_error),
1556 XGMAC_STAT(tx_ip_header_error),
1557 XGMAC_STAT(tx_local_fault),
1558 XGMAC_STAT(tx_remote_fault),
1559 XGMAC_STAT(tx_early),
1560 XGMAC_STAT(tx_process_stopped),
1561 XGMAC_STAT(tx_jabber),
1562 XGMAC_STAT(rx_buf_unav),
1563 XGMAC_STAT(rx_process_stopped),
1564 XGMAC_STAT(rx_payload_error),
1565 XGMAC_STAT(rx_ip_header_error),
1566 XGMAC_STAT(rx_da_filter_fail),
1567 XGMAC_STAT(rx_sa_filter_fail),
1568 XGMAC_STAT(fatal_bus_error),
1569 XGMAC_HW_STAT(rx_watchdog, XGMAC_MMC_RXWATCHDOG),
1570 XGMAC_HW_STAT(tx_vlan, XGMAC_MMC_TXVLANFRAME),
1571 XGMAC_HW_STAT(rx_vlan, XGMAC_MMC_RXVLANFRAME),
1572 XGMAC_HW_STAT(tx_pause, XGMAC_MMC_TXPAUSEFRAME),
1573 XGMAC_HW_STAT(rx_pause, XGMAC_MMC_RXPAUSEFRAME),
1575 #define XGMAC_STATS_LEN ARRAY_SIZE(xgmac_gstrings_stats)
1577 static void xgmac_get_ethtool_stats(struct net_device *dev,
1578 struct ethtool_stats *dummy,
1581 struct xgmac_priv *priv = netdev_priv(dev);
1585 for (i = 0; i < XGMAC_STATS_LEN; i++) {
1586 if (xgmac_gstrings_stats[i].is_reg)
1587 *data++ = readl(priv->base +
1588 xgmac_gstrings_stats[i].stat_offset);
1590 *data++ = *(u32 *)(p +
1591 xgmac_gstrings_stats[i].stat_offset);
1595 static int xgmac_get_sset_count(struct net_device *netdev, int sset)
1599 return XGMAC_STATS_LEN;
1605 static void xgmac_get_strings(struct net_device *dev, u32 stringset,
1611 switch (stringset) {
1613 for (i = 0; i < XGMAC_STATS_LEN; i++) {
1614 memcpy(p, xgmac_gstrings_stats[i].stat_string,
1616 p += ETH_GSTRING_LEN;
1625 static void xgmac_get_wol(struct net_device *dev,
1626 struct ethtool_wolinfo *wol)
1628 struct xgmac_priv *priv = netdev_priv(dev);
1630 if (device_can_wakeup(priv->device)) {
1631 wol->supported = WAKE_MAGIC | WAKE_UCAST;
1632 wol->wolopts = priv->wolopts;
1636 static int xgmac_set_wol(struct net_device *dev,
1637 struct ethtool_wolinfo *wol)
1639 struct xgmac_priv *priv = netdev_priv(dev);
1640 u32 support = WAKE_MAGIC | WAKE_UCAST;
1642 if (!device_can_wakeup(priv->device))
1645 if (wol->wolopts & ~support)
1648 priv->wolopts = wol->wolopts;
1651 device_set_wakeup_enable(priv->device, 1);
1652 enable_irq_wake(dev->irq);
1654 device_set_wakeup_enable(priv->device, 0);
1655 disable_irq_wake(dev->irq);
1661 static const struct ethtool_ops xgmac_ethtool_ops = {
1662 .get_settings = xgmac_ethtool_getsettings,
1663 .get_link = ethtool_op_get_link,
1664 .get_pauseparam = xgmac_get_pauseparam,
1665 .set_pauseparam = xgmac_set_pauseparam,
1666 .get_ethtool_stats = xgmac_get_ethtool_stats,
1667 .get_strings = xgmac_get_strings,
1668 .get_wol = xgmac_get_wol,
1669 .set_wol = xgmac_set_wol,
1670 .get_sset_count = xgmac_get_sset_count,
1675 * @pdev: platform device pointer
1676 * Description: the driver is initialized through platform_device.
1678 static int xgmac_probe(struct platform_device *pdev)
1681 struct resource *res;
1682 struct net_device *ndev = NULL;
1683 struct xgmac_priv *priv = NULL;
1686 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1690 if (!request_mem_region(res->start, resource_size(res), pdev->name))
1693 ndev = alloc_etherdev(sizeof(struct xgmac_priv));
1699 SET_NETDEV_DEV(ndev, &pdev->dev);
1700 priv = netdev_priv(ndev);
1701 platform_set_drvdata(pdev, ndev);
1703 ndev->netdev_ops = &xgmac_netdev_ops;
1704 SET_ETHTOOL_OPS(ndev, &xgmac_ethtool_ops);
1705 spin_lock_init(&priv->stats_lock);
1707 priv->device = &pdev->dev;
1712 priv->base = ioremap(res->start, resource_size(res));
1714 netdev_err(ndev, "ioremap failed\n");
1719 uid = readl(priv->base + XGMAC_VERSION);
1720 netdev_info(ndev, "h/w version is 0x%x\n", uid);
1722 writel(0, priv->base + XGMAC_DMA_INTR_ENA);
1723 ndev->irq = platform_get_irq(pdev, 0);
1724 if (ndev->irq == -ENXIO) {
1725 netdev_err(ndev, "No irq resource\n");
1730 ret = request_irq(ndev->irq, xgmac_interrupt, 0,
1731 dev_name(&pdev->dev), ndev);
1733 netdev_err(ndev, "Could not request irq %d - ret %d)\n",
1738 priv->pmt_irq = platform_get_irq(pdev, 1);
1739 if (priv->pmt_irq == -ENXIO) {
1740 netdev_err(ndev, "No pmt irq resource\n");
1741 ret = priv->pmt_irq;
1745 ret = request_irq(priv->pmt_irq, xgmac_pmt_interrupt, 0,
1746 dev_name(&pdev->dev), ndev);
1748 netdev_err(ndev, "Could not request irq %d - ret %d)\n",
1749 priv->pmt_irq, ret);
1753 device_set_wakeup_capable(&pdev->dev, 1);
1754 if (device_can_wakeup(priv->device))
1755 priv->wolopts = WAKE_MAGIC; /* Magic Frame as default */
1757 ndev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA;
1758 if (readl(priv->base + XGMAC_DMA_HW_FEATURE) & DMA_HW_FEAT_TXCOESEL)
1759 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1761 ndev->features |= ndev->hw_features;
1762 ndev->priv_flags |= IFF_UNICAST_FLT;
1764 /* Get the MAC address */
1765 xgmac_get_mac_addr(priv->base, ndev->dev_addr, 0);
1766 if (!is_valid_ether_addr(ndev->dev_addr))
1767 netdev_warn(ndev, "MAC address %pM not valid",
1770 netif_napi_add(ndev, &priv->napi, xgmac_poll, 64);
1771 ret = register_netdev(ndev);
1778 netif_napi_del(&priv->napi);
1779 free_irq(priv->pmt_irq, ndev);
1781 free_irq(ndev->irq, ndev);
1783 iounmap(priv->base);
1787 release_mem_region(res->start, resource_size(res));
1788 platform_set_drvdata(pdev, NULL);
1794 * @pdev: platform device pointer
1795 * Description: this function resets the TX/RX processes, disables the MAC RX/TX
1796 * changes the link status, releases the DMA descriptor rings,
1797 * unregisters the MDIO bus and unmaps the allocated memory.
1799 static int xgmac_remove(struct platform_device *pdev)
1801 struct net_device *ndev = platform_get_drvdata(pdev);
1802 struct xgmac_priv *priv = netdev_priv(ndev);
1803 struct resource *res;
1805 xgmac_mac_disable(priv->base);
1807 /* Free the IRQ lines */
1808 free_irq(ndev->irq, ndev);
1809 free_irq(priv->pmt_irq, ndev);
1811 platform_set_drvdata(pdev, NULL);
1812 unregister_netdev(ndev);
1813 netif_napi_del(&priv->napi);
1815 iounmap(priv->base);
1816 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1817 release_mem_region(res->start, resource_size(res));
1824 #ifdef CONFIG_PM_SLEEP
1825 static void xgmac_pmt(void __iomem *ioaddr, unsigned long mode)
1827 unsigned int pmt = 0;
1829 if (mode & WAKE_MAGIC)
1830 pmt |= XGMAC_PMT_POWERDOWN | XGMAC_PMT_MAGIC_PKT;
1831 if (mode & WAKE_UCAST)
1832 pmt |= XGMAC_PMT_POWERDOWN | XGMAC_PMT_GLBL_UNICAST;
1834 writel(pmt, ioaddr + XGMAC_PMT);
1837 static int xgmac_suspend(struct device *dev)
1839 struct net_device *ndev = platform_get_drvdata(to_platform_device(dev));
1840 struct xgmac_priv *priv = netdev_priv(ndev);
1843 if (!ndev || !netif_running(ndev))
1846 netif_device_detach(ndev);
1847 napi_disable(&priv->napi);
1848 writel(0, priv->base + XGMAC_DMA_INTR_ENA);
1850 if (device_may_wakeup(priv->device)) {
1851 /* Stop TX/RX DMA Only */
1852 value = readl(priv->base + XGMAC_DMA_CONTROL);
1853 value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR);
1854 writel(value, priv->base + XGMAC_DMA_CONTROL);
1856 xgmac_pmt(priv->base, priv->wolopts);
1858 xgmac_mac_disable(priv->base);
1863 static int xgmac_resume(struct device *dev)
1865 struct net_device *ndev = platform_get_drvdata(to_platform_device(dev));
1866 struct xgmac_priv *priv = netdev_priv(ndev);
1867 void __iomem *ioaddr = priv->base;
1869 if (!netif_running(ndev))
1872 xgmac_pmt(ioaddr, 0);
1874 /* Enable the MAC and DMA */
1875 xgmac_mac_enable(ioaddr);
1876 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS);
1877 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA);
1879 netif_device_attach(ndev);
1880 napi_enable(&priv->napi);
1885 static SIMPLE_DEV_PM_OPS(xgmac_pm_ops, xgmac_suspend, xgmac_resume);
1886 #define XGMAC_PM_OPS (&xgmac_pm_ops)
1888 #define XGMAC_PM_OPS NULL
1889 #endif /* CONFIG_PM_SLEEP */
1891 static const struct of_device_id xgmac_of_match[] = {
1892 { .compatible = "calxeda,hb-xgmac", },
1895 MODULE_DEVICE_TABLE(of, xgmac_of_match);
1897 static struct platform_driver xgmac_driver = {
1899 .name = "calxedaxgmac",
1900 .of_match_table = xgmac_of_match,
1902 .probe = xgmac_probe,
1903 .remove = xgmac_remove,
1904 .driver.pm = XGMAC_PM_OPS,
1907 module_platform_driver(xgmac_driver);
1909 MODULE_AUTHOR("Calxeda, Inc.");
1910 MODULE_DESCRIPTION("Calxeda 10G XGMAC driver");
1911 MODULE_LICENSE("GPL v2");