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_PMTIM 0x00800000 /* PMT Interrupt Mask */
167 #define XGMAC_INT_STAT_PMT 0x0080 /* PMT Interrupt Status */
168 #define XGMAC_INT_STAT_LPI 0x0040 /* LPI Interrupt Status */
170 /* DMA Bus Mode register defines */
171 #define DMA_BUS_MODE_SFT_RESET 0x00000001 /* Software Reset */
172 #define DMA_BUS_MODE_DSL_MASK 0x0000007c /* Descriptor Skip Length */
173 #define DMA_BUS_MODE_DSL_SHIFT 2 /* (in DWORDS) */
174 #define DMA_BUS_MODE_ATDS 0x00000080 /* Alternate Descriptor Size */
176 /* Programmable burst length */
177 #define DMA_BUS_MODE_PBL_MASK 0x00003f00 /* Programmable Burst Len */
178 #define DMA_BUS_MODE_PBL_SHIFT 8
179 #define DMA_BUS_MODE_FB 0x00010000 /* Fixed burst */
180 #define DMA_BUS_MODE_RPBL_MASK 0x003e0000 /* Rx-Programmable Burst Len */
181 #define DMA_BUS_MODE_RPBL_SHIFT 17
182 #define DMA_BUS_MODE_USP 0x00800000
183 #define DMA_BUS_MODE_8PBL 0x01000000
184 #define DMA_BUS_MODE_AAL 0x02000000
186 /* DMA Bus Mode register defines */
187 #define DMA_BUS_PR_RATIO_MASK 0x0000c000 /* Rx/Tx priority ratio */
188 #define DMA_BUS_PR_RATIO_SHIFT 14
189 #define DMA_BUS_FB 0x00010000 /* Fixed Burst */
191 /* DMA Control register defines */
192 #define DMA_CONTROL_ST 0x00002000 /* Start/Stop Transmission */
193 #define DMA_CONTROL_SR 0x00000002 /* Start/Stop Receive */
194 #define DMA_CONTROL_DFF 0x01000000 /* Disable flush of rx frames */
195 #define DMA_CONTROL_OSF 0x00000004 /* Operate on 2nd tx frame */
197 /* DMA Normal interrupt */
198 #define DMA_INTR_ENA_NIE 0x00010000 /* Normal Summary */
199 #define DMA_INTR_ENA_AIE 0x00008000 /* Abnormal Summary */
200 #define DMA_INTR_ENA_ERE 0x00004000 /* Early Receive */
201 #define DMA_INTR_ENA_FBE 0x00002000 /* Fatal Bus Error */
202 #define DMA_INTR_ENA_ETE 0x00000400 /* Early Transmit */
203 #define DMA_INTR_ENA_RWE 0x00000200 /* Receive Watchdog */
204 #define DMA_INTR_ENA_RSE 0x00000100 /* Receive Stopped */
205 #define DMA_INTR_ENA_RUE 0x00000080 /* Receive Buffer Unavailable */
206 #define DMA_INTR_ENA_RIE 0x00000040 /* Receive Interrupt */
207 #define DMA_INTR_ENA_UNE 0x00000020 /* Tx Underflow */
208 #define DMA_INTR_ENA_OVE 0x00000010 /* Receive Overflow */
209 #define DMA_INTR_ENA_TJE 0x00000008 /* Transmit Jabber */
210 #define DMA_INTR_ENA_TUE 0x00000004 /* Transmit Buffer Unavail */
211 #define DMA_INTR_ENA_TSE 0x00000002 /* Transmit Stopped */
212 #define DMA_INTR_ENA_TIE 0x00000001 /* Transmit Interrupt */
214 #define DMA_INTR_NORMAL (DMA_INTR_ENA_NIE | DMA_INTR_ENA_RIE | \
215 DMA_INTR_ENA_TUE | DMA_INTR_ENA_TIE)
217 #define DMA_INTR_ABNORMAL (DMA_INTR_ENA_AIE | DMA_INTR_ENA_FBE | \
218 DMA_INTR_ENA_RWE | DMA_INTR_ENA_RSE | \
219 DMA_INTR_ENA_RUE | DMA_INTR_ENA_UNE | \
220 DMA_INTR_ENA_OVE | DMA_INTR_ENA_TJE | \
223 /* DMA default interrupt mask */
224 #define DMA_INTR_DEFAULT_MASK (DMA_INTR_NORMAL | DMA_INTR_ABNORMAL)
226 /* DMA Status register defines */
227 #define DMA_STATUS_GMI 0x08000000 /* MMC interrupt */
228 #define DMA_STATUS_GLI 0x04000000 /* GMAC Line interface int */
229 #define DMA_STATUS_EB_MASK 0x00380000 /* Error Bits Mask */
230 #define DMA_STATUS_EB_TX_ABORT 0x00080000 /* Error Bits - TX Abort */
231 #define DMA_STATUS_EB_RX_ABORT 0x00100000 /* Error Bits - RX Abort */
232 #define DMA_STATUS_TS_MASK 0x00700000 /* Transmit Process State */
233 #define DMA_STATUS_TS_SHIFT 20
234 #define DMA_STATUS_RS_MASK 0x000e0000 /* Receive Process State */
235 #define DMA_STATUS_RS_SHIFT 17
236 #define DMA_STATUS_NIS 0x00010000 /* Normal Interrupt Summary */
237 #define DMA_STATUS_AIS 0x00008000 /* Abnormal Interrupt Summary */
238 #define DMA_STATUS_ERI 0x00004000 /* Early Receive Interrupt */
239 #define DMA_STATUS_FBI 0x00002000 /* Fatal Bus Error Interrupt */
240 #define DMA_STATUS_ETI 0x00000400 /* Early Transmit Interrupt */
241 #define DMA_STATUS_RWT 0x00000200 /* Receive Watchdog Timeout */
242 #define DMA_STATUS_RPS 0x00000100 /* Receive Process Stopped */
243 #define DMA_STATUS_RU 0x00000080 /* Receive Buffer Unavailable */
244 #define DMA_STATUS_RI 0x00000040 /* Receive Interrupt */
245 #define DMA_STATUS_UNF 0x00000020 /* Transmit Underflow */
246 #define DMA_STATUS_OVF 0x00000010 /* Receive Overflow */
247 #define DMA_STATUS_TJT 0x00000008 /* Transmit Jabber Timeout */
248 #define DMA_STATUS_TU 0x00000004 /* Transmit Buffer Unavail */
249 #define DMA_STATUS_TPS 0x00000002 /* Transmit Process Stopped */
250 #define DMA_STATUS_TI 0x00000001 /* Transmit Interrupt */
252 /* Common MAC defines */
253 #define MAC_ENABLE_TX 0x00000008 /* Transmitter Enable */
254 #define MAC_ENABLE_RX 0x00000004 /* Receiver Enable */
256 /* XGMAC Operation Mode Register */
257 #define XGMAC_OMR_TSF 0x00200000 /* TX FIFO Store and Forward */
258 #define XGMAC_OMR_FTF 0x00100000 /* Flush Transmit FIFO */
259 #define XGMAC_OMR_TTC 0x00020000 /* Transmit Threshhold Ctrl */
260 #define XGMAC_OMR_TTC_MASK 0x00030000
261 #define XGMAC_OMR_RFD 0x00006000 /* FC Deactivation Threshhold */
262 #define XGMAC_OMR_RFD_MASK 0x00007000 /* FC Deact Threshhold MASK */
263 #define XGMAC_OMR_RFA 0x00000600 /* FC Activation Threshhold */
264 #define XGMAC_OMR_RFA_MASK 0x00000E00 /* FC Act Threshhold MASK */
265 #define XGMAC_OMR_EFC 0x00000100 /* Enable Hardware FC */
266 #define XGMAC_OMR_FEF 0x00000080 /* Forward Error Frames */
267 #define XGMAC_OMR_DT 0x00000040 /* Drop TCP/IP csum Errors */
268 #define XGMAC_OMR_RSF 0x00000020 /* RX FIFO Store and Forward */
269 #define XGMAC_OMR_RTC_256 0x00000018 /* RX Threshhold Ctrl */
270 #define XGMAC_OMR_RTC_MASK 0x00000018 /* RX Threshhold Ctrl MASK */
272 /* XGMAC HW Features Register */
273 #define DMA_HW_FEAT_TXCOESEL 0x00010000 /* TX Checksum offload */
275 #define XGMAC_MMC_CTRL_CNT_FRZ 0x00000008
277 /* XGMAC Descriptor Defines */
278 #define MAX_DESC_BUF_SZ (0x2000 - 8)
280 #define RXDESC_EXT_STATUS 0x00000001
281 #define RXDESC_CRC_ERR 0x00000002
282 #define RXDESC_RX_ERR 0x00000008
283 #define RXDESC_RX_WDOG 0x00000010
284 #define RXDESC_FRAME_TYPE 0x00000020
285 #define RXDESC_GIANT_FRAME 0x00000080
286 #define RXDESC_LAST_SEG 0x00000100
287 #define RXDESC_FIRST_SEG 0x00000200
288 #define RXDESC_VLAN_FRAME 0x00000400
289 #define RXDESC_OVERFLOW_ERR 0x00000800
290 #define RXDESC_LENGTH_ERR 0x00001000
291 #define RXDESC_SA_FILTER_FAIL 0x00002000
292 #define RXDESC_DESCRIPTOR_ERR 0x00004000
293 #define RXDESC_ERROR_SUMMARY 0x00008000
294 #define RXDESC_FRAME_LEN_OFFSET 16
295 #define RXDESC_FRAME_LEN_MASK 0x3fff0000
296 #define RXDESC_DA_FILTER_FAIL 0x40000000
298 #define RXDESC1_END_RING 0x00008000
300 #define RXDESC_IP_PAYLOAD_MASK 0x00000003
301 #define RXDESC_IP_PAYLOAD_UDP 0x00000001
302 #define RXDESC_IP_PAYLOAD_TCP 0x00000002
303 #define RXDESC_IP_PAYLOAD_ICMP 0x00000003
304 #define RXDESC_IP_HEADER_ERR 0x00000008
305 #define RXDESC_IP_PAYLOAD_ERR 0x00000010
306 #define RXDESC_IPV4_PACKET 0x00000040
307 #define RXDESC_IPV6_PACKET 0x00000080
308 #define TXDESC_UNDERFLOW_ERR 0x00000001
309 #define TXDESC_JABBER_TIMEOUT 0x00000002
310 #define TXDESC_LOCAL_FAULT 0x00000004
311 #define TXDESC_REMOTE_FAULT 0x00000008
312 #define TXDESC_VLAN_FRAME 0x00000010
313 #define TXDESC_FRAME_FLUSHED 0x00000020
314 #define TXDESC_IP_HEADER_ERR 0x00000040
315 #define TXDESC_PAYLOAD_CSUM_ERR 0x00000080
316 #define TXDESC_ERROR_SUMMARY 0x00008000
317 #define TXDESC_SA_CTRL_INSERT 0x00040000
318 #define TXDESC_SA_CTRL_REPLACE 0x00080000
319 #define TXDESC_2ND_ADDR_CHAINED 0x00100000
320 #define TXDESC_END_RING 0x00200000
321 #define TXDESC_CSUM_IP 0x00400000
322 #define TXDESC_CSUM_IP_PAYLD 0x00800000
323 #define TXDESC_CSUM_ALL 0x00C00000
324 #define TXDESC_CRC_EN_REPLACE 0x01000000
325 #define TXDESC_CRC_EN_APPEND 0x02000000
326 #define TXDESC_DISABLE_PAD 0x04000000
327 #define TXDESC_FIRST_SEG 0x10000000
328 #define TXDESC_LAST_SEG 0x20000000
329 #define TXDESC_INTERRUPT 0x40000000
331 #define DESC_OWN 0x80000000
332 #define DESC_BUFFER1_SZ_MASK 0x00001fff
333 #define DESC_BUFFER2_SZ_MASK 0x1fff0000
334 #define DESC_BUFFER2_SZ_OFFSET 16
336 struct xgmac_dma_desc {
339 __le32 buf1_addr; /* Buffer 1 Address Pointer */
340 __le32 buf2_addr; /* Buffer 2 Address Pointer */
345 struct xgmac_extra_stats {
346 /* Transmit errors */
347 unsigned long tx_jabber;
348 unsigned long tx_frame_flushed;
349 unsigned long tx_payload_error;
350 unsigned long tx_ip_header_error;
351 unsigned long tx_local_fault;
352 unsigned long tx_remote_fault;
354 unsigned long rx_watchdog;
355 unsigned long rx_da_filter_fail;
356 unsigned long rx_sa_filter_fail;
357 unsigned long rx_payload_error;
358 unsigned long rx_ip_header_error;
359 /* Tx/Rx IRQ errors */
360 unsigned long tx_undeflow;
361 unsigned long tx_process_stopped;
362 unsigned long rx_buf_unav;
363 unsigned long rx_process_stopped;
364 unsigned long tx_early;
365 unsigned long fatal_bus_error;
369 struct xgmac_dma_desc *dma_rx;
370 struct sk_buff **rx_skbuff;
371 unsigned int rx_tail;
372 unsigned int rx_head;
374 struct xgmac_dma_desc *dma_tx;
375 struct sk_buff **tx_skbuff;
376 unsigned int tx_head;
377 unsigned int tx_tail;
381 unsigned int dma_buf_sz;
382 dma_addr_t dma_rx_phy;
383 dma_addr_t dma_tx_phy;
385 struct net_device *dev;
386 struct device *device;
387 struct napi_struct napi;
389 struct xgmac_extra_stats xstats;
391 spinlock_t stats_lock;
396 struct work_struct tx_timeout_work;
399 /* XGMAC Configuration Settings */
401 #define PAUSE_TIME 0x400
403 #define DMA_RX_RING_SZ 256
404 #define DMA_TX_RING_SZ 128
405 /* minimum number of free TX descriptors required to wake up TX process */
406 #define TX_THRESH (DMA_TX_RING_SZ/4)
408 /* DMA descriptor ring helpers */
409 #define dma_ring_incr(n, s) (((n) + 1) & ((s) - 1))
410 #define dma_ring_space(h, t, s) CIRC_SPACE(h, t, s)
411 #define dma_ring_cnt(h, t, s) CIRC_CNT(h, t, s)
413 #define tx_dma_ring_space(p) \
414 dma_ring_space((p)->tx_head, (p)->tx_tail, DMA_TX_RING_SZ)
416 /* XGMAC Descriptor Access Helpers */
417 static inline void desc_set_buf_len(struct xgmac_dma_desc *p, u32 buf_sz)
419 if (buf_sz > MAX_DESC_BUF_SZ)
420 p->buf_size = cpu_to_le32(MAX_DESC_BUF_SZ |
421 (buf_sz - MAX_DESC_BUF_SZ) << DESC_BUFFER2_SZ_OFFSET);
423 p->buf_size = cpu_to_le32(buf_sz);
426 static inline int desc_get_buf_len(struct xgmac_dma_desc *p)
428 u32 len = le32_to_cpu(p->buf_size);
429 return (len & DESC_BUFFER1_SZ_MASK) +
430 ((len & DESC_BUFFER2_SZ_MASK) >> DESC_BUFFER2_SZ_OFFSET);
433 static inline void desc_init_rx_desc(struct xgmac_dma_desc *p, int ring_size,
436 struct xgmac_dma_desc *end = p + ring_size - 1;
438 memset(p, 0, sizeof(*p) * ring_size);
440 for (; p <= end; p++)
441 desc_set_buf_len(p, buf_sz);
443 end->buf_size |= cpu_to_le32(RXDESC1_END_RING);
446 static inline void desc_init_tx_desc(struct xgmac_dma_desc *p, u32 ring_size)
448 memset(p, 0, sizeof(*p) * ring_size);
449 p[ring_size - 1].flags = cpu_to_le32(TXDESC_END_RING);
452 static inline int desc_get_owner(struct xgmac_dma_desc *p)
454 return le32_to_cpu(p->flags) & DESC_OWN;
457 static inline void desc_set_rx_owner(struct xgmac_dma_desc *p)
459 /* Clear all fields and set the owner */
460 p->flags = cpu_to_le32(DESC_OWN);
463 static inline void desc_set_tx_owner(struct xgmac_dma_desc *p, u32 flags)
465 u32 tmpflags = le32_to_cpu(p->flags);
466 tmpflags &= TXDESC_END_RING;
467 tmpflags |= flags | DESC_OWN;
468 p->flags = cpu_to_le32(tmpflags);
471 static inline int desc_get_tx_ls(struct xgmac_dma_desc *p)
473 return le32_to_cpu(p->flags) & TXDESC_LAST_SEG;
476 static inline int desc_get_tx_fs(struct xgmac_dma_desc *p)
478 return le32_to_cpu(p->flags) & TXDESC_FIRST_SEG;
481 static inline u32 desc_get_buf_addr(struct xgmac_dma_desc *p)
483 return le32_to_cpu(p->buf1_addr);
486 static inline void desc_set_buf_addr(struct xgmac_dma_desc *p,
489 p->buf1_addr = cpu_to_le32(paddr);
490 if (len > MAX_DESC_BUF_SZ)
491 p->buf2_addr = cpu_to_le32(paddr + MAX_DESC_BUF_SZ);
494 static inline void desc_set_buf_addr_and_size(struct xgmac_dma_desc *p,
497 desc_set_buf_len(p, len);
498 desc_set_buf_addr(p, paddr, len);
501 static inline int desc_get_rx_frame_len(struct xgmac_dma_desc *p)
503 u32 data = le32_to_cpu(p->flags);
504 u32 len = (data & RXDESC_FRAME_LEN_MASK) >> RXDESC_FRAME_LEN_OFFSET;
505 if (data & RXDESC_FRAME_TYPE)
511 static void xgmac_dma_flush_tx_fifo(void __iomem *ioaddr)
514 u32 reg = readl(ioaddr + XGMAC_OMR);
515 writel(reg | XGMAC_OMR_FTF, ioaddr + XGMAC_OMR);
517 while ((timeout-- > 0) && readl(ioaddr + XGMAC_OMR) & XGMAC_OMR_FTF)
521 static int desc_get_tx_status(struct xgmac_priv *priv, struct xgmac_dma_desc *p)
523 struct xgmac_extra_stats *x = &priv->xstats;
524 u32 status = le32_to_cpu(p->flags);
526 if (!(status & TXDESC_ERROR_SUMMARY))
529 netdev_dbg(priv->dev, "tx desc error = 0x%08x\n", status);
530 if (status & TXDESC_JABBER_TIMEOUT)
532 if (status & TXDESC_FRAME_FLUSHED)
533 x->tx_frame_flushed++;
534 if (status & TXDESC_UNDERFLOW_ERR)
535 xgmac_dma_flush_tx_fifo(priv->base);
536 if (status & TXDESC_IP_HEADER_ERR)
537 x->tx_ip_header_error++;
538 if (status & TXDESC_LOCAL_FAULT)
540 if (status & TXDESC_REMOTE_FAULT)
541 x->tx_remote_fault++;
542 if (status & TXDESC_PAYLOAD_CSUM_ERR)
543 x->tx_payload_error++;
548 static int desc_get_rx_status(struct xgmac_priv *priv, struct xgmac_dma_desc *p)
550 struct xgmac_extra_stats *x = &priv->xstats;
551 int ret = CHECKSUM_UNNECESSARY;
552 u32 status = le32_to_cpu(p->flags);
553 u32 ext_status = le32_to_cpu(p->ext_status);
555 if (status & RXDESC_DA_FILTER_FAIL) {
556 netdev_dbg(priv->dev, "XGMAC RX : Dest Address filter fail\n");
557 x->rx_da_filter_fail++;
561 /* All frames should fit into a single buffer */
562 if (!(status & RXDESC_FIRST_SEG) || !(status & RXDESC_LAST_SEG))
565 /* Check if packet has checksum already */
566 if ((status & RXDESC_FRAME_TYPE) && (status & RXDESC_EXT_STATUS) &&
567 !(ext_status & RXDESC_IP_PAYLOAD_MASK))
570 netdev_dbg(priv->dev, "rx status - frame type=%d, csum = %d, ext stat %08x\n",
571 (status & RXDESC_FRAME_TYPE) ? 1 : 0, ret, ext_status);
573 if (!(status & RXDESC_ERROR_SUMMARY))
576 /* Handle any errors */
577 if (status & (RXDESC_DESCRIPTOR_ERR | RXDESC_OVERFLOW_ERR |
578 RXDESC_GIANT_FRAME | RXDESC_LENGTH_ERR | RXDESC_CRC_ERR))
581 if (status & RXDESC_EXT_STATUS) {
582 if (ext_status & RXDESC_IP_HEADER_ERR)
583 x->rx_ip_header_error++;
584 if (ext_status & RXDESC_IP_PAYLOAD_ERR)
585 x->rx_payload_error++;
586 netdev_dbg(priv->dev, "IP checksum error - stat %08x\n",
588 return CHECKSUM_NONE;
594 static inline void xgmac_mac_enable(void __iomem *ioaddr)
596 u32 value = readl(ioaddr + XGMAC_CONTROL);
597 value |= MAC_ENABLE_RX | MAC_ENABLE_TX;
598 writel(value, ioaddr + XGMAC_CONTROL);
600 value = readl(ioaddr + XGMAC_DMA_CONTROL);
601 value |= DMA_CONTROL_ST | DMA_CONTROL_SR;
602 writel(value, ioaddr + XGMAC_DMA_CONTROL);
605 static inline void xgmac_mac_disable(void __iomem *ioaddr)
607 u32 value = readl(ioaddr + XGMAC_DMA_CONTROL);
608 value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR);
609 writel(value, ioaddr + XGMAC_DMA_CONTROL);
611 value = readl(ioaddr + XGMAC_CONTROL);
612 value &= ~(MAC_ENABLE_TX | MAC_ENABLE_RX);
613 writel(value, ioaddr + XGMAC_CONTROL);
616 static void xgmac_set_mac_addr(void __iomem *ioaddr, unsigned char *addr,
622 data = (addr[5] << 8) | addr[4] | (num ? XGMAC_ADDR_AE : 0);
623 writel(data, ioaddr + XGMAC_ADDR_HIGH(num));
624 data = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0];
625 writel(data, ioaddr + XGMAC_ADDR_LOW(num));
627 writel(0, ioaddr + XGMAC_ADDR_HIGH(num));
628 writel(0, ioaddr + XGMAC_ADDR_LOW(num));
632 static void xgmac_get_mac_addr(void __iomem *ioaddr, unsigned char *addr,
635 u32 hi_addr, lo_addr;
637 /* Read the MAC address from the hardware */
638 hi_addr = readl(ioaddr + XGMAC_ADDR_HIGH(num));
639 lo_addr = readl(ioaddr + XGMAC_ADDR_LOW(num));
641 /* Extract the MAC address from the high and low words */
642 addr[0] = lo_addr & 0xff;
643 addr[1] = (lo_addr >> 8) & 0xff;
644 addr[2] = (lo_addr >> 16) & 0xff;
645 addr[3] = (lo_addr >> 24) & 0xff;
646 addr[4] = hi_addr & 0xff;
647 addr[5] = (hi_addr >> 8) & 0xff;
650 static int xgmac_set_flow_ctrl(struct xgmac_priv *priv, int rx, int tx)
653 unsigned int flow = 0;
660 flow |= XGMAC_FLOW_CTRL_RFE;
662 flow |= XGMAC_FLOW_CTRL_TFE;
664 flow |= XGMAC_FLOW_CTRL_PLT | XGMAC_FLOW_CTRL_UP;
665 flow |= (PAUSE_TIME << XGMAC_FLOW_CTRL_PT_SHIFT);
667 writel(flow, priv->base + XGMAC_FLOW_CTRL);
669 reg = readl(priv->base + XGMAC_OMR);
670 reg |= XGMAC_OMR_EFC;
671 writel(reg, priv->base + XGMAC_OMR);
673 writel(0, priv->base + XGMAC_FLOW_CTRL);
675 reg = readl(priv->base + XGMAC_OMR);
676 reg &= ~XGMAC_OMR_EFC;
677 writel(reg, priv->base + XGMAC_OMR);
683 static void xgmac_rx_refill(struct xgmac_priv *priv)
685 struct xgmac_dma_desc *p;
687 int bufsz = priv->dev->mtu + ETH_HLEN + ETH_FCS_LEN;
689 while (dma_ring_space(priv->rx_head, priv->rx_tail, DMA_RX_RING_SZ) > 1) {
690 int entry = priv->rx_head;
693 p = priv->dma_rx + entry;
695 if (priv->rx_skbuff[entry] == NULL) {
696 skb = netdev_alloc_skb_ip_align(priv->dev, bufsz);
697 if (unlikely(skb == NULL))
700 priv->rx_skbuff[entry] = skb;
701 paddr = dma_map_single(priv->device, skb->data,
702 bufsz, DMA_FROM_DEVICE);
703 desc_set_buf_addr(p, paddr, priv->dma_buf_sz);
706 netdev_dbg(priv->dev, "rx ring: head %d, tail %d\n",
707 priv->rx_head, priv->rx_tail);
709 priv->rx_head = dma_ring_incr(priv->rx_head, DMA_RX_RING_SZ);
710 desc_set_rx_owner(p);
715 * init_xgmac_dma_desc_rings - init the RX/TX descriptor rings
716 * @dev: net device structure
717 * Description: this function initializes the DMA RX/TX descriptors
718 * and allocates the socket buffers.
720 static int xgmac_dma_desc_rings_init(struct net_device *dev)
722 struct xgmac_priv *priv = netdev_priv(dev);
725 /* Set the Buffer size according to the MTU;
726 * The total buffer size including any IP offset must be a multiple
729 bfsize = ALIGN(dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN, 8);
731 netdev_dbg(priv->dev, "mtu [%d] bfsize [%d]\n", dev->mtu, bfsize);
733 priv->rx_skbuff = kzalloc(sizeof(struct sk_buff *) * DMA_RX_RING_SZ,
735 if (!priv->rx_skbuff)
738 priv->dma_rx = dma_alloc_coherent(priv->device,
740 sizeof(struct xgmac_dma_desc),
746 priv->tx_skbuff = kzalloc(sizeof(struct sk_buff *) * DMA_TX_RING_SZ,
748 if (!priv->tx_skbuff)
751 priv->dma_tx = dma_alloc_coherent(priv->device,
753 sizeof(struct xgmac_dma_desc),
759 netdev_dbg(priv->dev, "DMA desc rings: virt addr (Rx %p, "
760 "Tx %p)\n\tDMA phy addr (Rx 0x%08x, Tx 0x%08x)\n",
761 priv->dma_rx, priv->dma_tx,
762 (unsigned int)priv->dma_rx_phy, (unsigned int)priv->dma_tx_phy);
766 priv->dma_buf_sz = bfsize;
767 desc_init_rx_desc(priv->dma_rx, DMA_RX_RING_SZ, priv->dma_buf_sz);
768 xgmac_rx_refill(priv);
772 desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ);
774 writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR);
775 writel(priv->dma_rx_phy, priv->base + XGMAC_DMA_RX_BASE_ADDR);
780 kfree(priv->tx_skbuff);
782 dma_free_coherent(priv->device,
783 DMA_RX_RING_SZ * sizeof(struct xgmac_dma_desc),
784 priv->dma_rx, priv->dma_rx_phy);
786 kfree(priv->rx_skbuff);
790 static void xgmac_free_rx_skbufs(struct xgmac_priv *priv)
793 struct xgmac_dma_desc *p;
795 if (!priv->rx_skbuff)
798 for (i = 0; i < DMA_RX_RING_SZ; i++) {
799 if (priv->rx_skbuff[i] == NULL)
802 p = priv->dma_rx + i;
803 dma_unmap_single(priv->device, desc_get_buf_addr(p),
804 priv->dma_buf_sz, DMA_FROM_DEVICE);
805 dev_kfree_skb_any(priv->rx_skbuff[i]);
806 priv->rx_skbuff[i] = NULL;
810 static void xgmac_free_tx_skbufs(struct xgmac_priv *priv)
813 struct xgmac_dma_desc *p;
815 if (!priv->tx_skbuff)
818 for (i = 0; i < DMA_TX_RING_SZ; i++) {
819 if (priv->tx_skbuff[i] == NULL)
822 p = priv->dma_tx + i;
823 if (desc_get_tx_fs(p))
824 dma_unmap_single(priv->device, desc_get_buf_addr(p),
825 desc_get_buf_len(p), DMA_TO_DEVICE);
827 dma_unmap_page(priv->device, desc_get_buf_addr(p),
828 desc_get_buf_len(p), DMA_TO_DEVICE);
830 if (desc_get_tx_ls(p))
831 dev_kfree_skb_any(priv->tx_skbuff[i]);
832 priv->tx_skbuff[i] = NULL;
836 static void xgmac_free_dma_desc_rings(struct xgmac_priv *priv)
838 /* Release the DMA TX/RX socket buffers */
839 xgmac_free_rx_skbufs(priv);
840 xgmac_free_tx_skbufs(priv);
842 /* Free the consistent memory allocated for descriptor rings */
844 dma_free_coherent(priv->device,
845 DMA_TX_RING_SZ * sizeof(struct xgmac_dma_desc),
846 priv->dma_tx, priv->dma_tx_phy);
850 dma_free_coherent(priv->device,
851 DMA_RX_RING_SZ * sizeof(struct xgmac_dma_desc),
852 priv->dma_rx, priv->dma_rx_phy);
855 kfree(priv->rx_skbuff);
856 priv->rx_skbuff = NULL;
857 kfree(priv->tx_skbuff);
858 priv->tx_skbuff = NULL;
863 * @priv: private driver structure
864 * Description: it reclaims resources after transmission completes.
866 static void xgmac_tx_complete(struct xgmac_priv *priv)
868 while (dma_ring_cnt(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ)) {
869 unsigned int entry = priv->tx_tail;
870 struct sk_buff *skb = priv->tx_skbuff[entry];
871 struct xgmac_dma_desc *p = priv->dma_tx + entry;
873 /* Check if the descriptor is owned by the DMA. */
874 if (desc_get_owner(p))
877 netdev_dbg(priv->dev, "tx ring: curr %d, dirty %d\n",
878 priv->tx_head, priv->tx_tail);
880 if (desc_get_tx_fs(p))
881 dma_unmap_single(priv->device, desc_get_buf_addr(p),
882 desc_get_buf_len(p), DMA_TO_DEVICE);
884 dma_unmap_page(priv->device, desc_get_buf_addr(p),
885 desc_get_buf_len(p), DMA_TO_DEVICE);
887 /* Check tx error on the last segment */
888 if (desc_get_tx_ls(p)) {
889 desc_get_tx_status(priv, p);
893 priv->tx_skbuff[entry] = NULL;
894 priv->tx_tail = dma_ring_incr(entry, DMA_TX_RING_SZ);
897 /* Ensure tx_tail is visible to xgmac_xmit */
899 if (unlikely(netif_queue_stopped(priv->dev) &&
900 (tx_dma_ring_space(priv) > MAX_SKB_FRAGS)))
901 netif_wake_queue(priv->dev);
904 static void xgmac_tx_timeout_work(struct work_struct *work)
907 struct xgmac_priv *priv =
908 container_of(work, struct xgmac_priv, tx_timeout_work);
910 napi_disable(&priv->napi);
912 writel(0, priv->base + XGMAC_DMA_INTR_ENA);
914 netif_tx_lock(priv->dev);
916 reg = readl(priv->base + XGMAC_DMA_CONTROL);
917 writel(reg & ~DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL);
919 value = readl(priv->base + XGMAC_DMA_STATUS) & 0x700000;
920 } while (value && (value != 0x600000));
922 xgmac_free_tx_skbufs(priv);
923 desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ);
926 writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR);
927 writel(reg | DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL);
929 writel(DMA_STATUS_TU | DMA_STATUS_TPS | DMA_STATUS_NIS | DMA_STATUS_AIS,
930 priv->base + XGMAC_DMA_STATUS);
932 netif_tx_unlock(priv->dev);
933 netif_wake_queue(priv->dev);
935 napi_enable(&priv->napi);
937 /* Enable interrupts */
938 writel(DMA_INTR_DEFAULT_MASK, priv->base + XGMAC_DMA_STATUS);
939 writel(DMA_INTR_DEFAULT_MASK, priv->base + XGMAC_DMA_INTR_ENA);
942 static int xgmac_hw_init(struct net_device *dev)
946 struct xgmac_priv *priv = netdev_priv(dev);
947 void __iomem *ioaddr = priv->base;
949 /* Save the ctrl register value */
950 ctrl = readl(ioaddr + XGMAC_CONTROL) & XGMAC_CONTROL_SPD_MASK;
953 value = DMA_BUS_MODE_SFT_RESET;
954 writel(value, ioaddr + XGMAC_DMA_BUS_MODE);
957 (readl(ioaddr + XGMAC_DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET))
962 value = (0x10 << DMA_BUS_MODE_PBL_SHIFT) |
963 (0x10 << DMA_BUS_MODE_RPBL_SHIFT) |
964 DMA_BUS_MODE_FB | DMA_BUS_MODE_ATDS | DMA_BUS_MODE_AAL;
965 writel(value, ioaddr + XGMAC_DMA_BUS_MODE);
967 writel(0, ioaddr + XGMAC_DMA_INTR_ENA);
969 /* Mask power mgt interrupt */
970 writel(XGMAC_INT_STAT_PMTIM, ioaddr + XGMAC_INT_STAT);
972 /* XGMAC requires AXI bus init. This is a 'magic number' for now */
973 writel(0x0077000E, ioaddr + XGMAC_DMA_AXI_BUS);
975 ctrl |= XGMAC_CONTROL_DDIC | XGMAC_CONTROL_JE | XGMAC_CONTROL_ACS |
977 if (dev->features & NETIF_F_RXCSUM)
978 ctrl |= XGMAC_CONTROL_IPC;
979 writel(ctrl, ioaddr + XGMAC_CONTROL);
981 writel(DMA_CONTROL_OSF, ioaddr + XGMAC_DMA_CONTROL);
983 /* Set the HW DMA mode and the COE */
984 writel(XGMAC_OMR_TSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA |
988 /* Reset the MMC counters */
989 writel(1, ioaddr + XGMAC_MMC_CTRL);
994 * xgmac_open - open entry point of the driver
995 * @dev : pointer to the device structure.
997 * This function is the open entry point of the driver.
999 * 0 on success and an appropriate (-)ve integer as defined in errno.h
1002 static int xgmac_open(struct net_device *dev)
1005 struct xgmac_priv *priv = netdev_priv(dev);
1006 void __iomem *ioaddr = priv->base;
1008 /* Check that the MAC address is valid. If its not, refuse
1009 * to bring the device up. The user must specify an
1010 * address using the following linux command:
1011 * ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx */
1012 if (!is_valid_ether_addr(dev->dev_addr)) {
1013 eth_hw_addr_random(dev);
1014 netdev_dbg(priv->dev, "generated random MAC address %pM\n",
1018 memset(&priv->xstats, 0, sizeof(struct xgmac_extra_stats));
1020 /* Initialize the XGMAC and descriptors */
1022 xgmac_set_mac_addr(ioaddr, dev->dev_addr, 0);
1023 xgmac_set_flow_ctrl(priv, priv->rx_pause, priv->tx_pause);
1025 ret = xgmac_dma_desc_rings_init(dev);
1029 /* Enable the MAC Rx/Tx */
1030 xgmac_mac_enable(ioaddr);
1032 napi_enable(&priv->napi);
1033 netif_start_queue(dev);
1035 /* Enable interrupts */
1036 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS);
1037 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA);
1043 * xgmac_release - close entry point of the driver
1044 * @dev : device pointer.
1046 * This is the stop entry point of the driver.
1048 static int xgmac_stop(struct net_device *dev)
1050 struct xgmac_priv *priv = netdev_priv(dev);
1052 netif_stop_queue(dev);
1054 if (readl(priv->base + XGMAC_DMA_INTR_ENA))
1055 napi_disable(&priv->napi);
1057 writel(0, priv->base + XGMAC_DMA_INTR_ENA);
1059 /* Disable the MAC core */
1060 xgmac_mac_disable(priv->base);
1062 /* Release and free the Rx/Tx resources */
1063 xgmac_free_dma_desc_rings(priv);
1070 * @skb : the socket buffer
1071 * @dev : device pointer
1072 * Description : Tx entry point of the driver.
1074 static netdev_tx_t xgmac_xmit(struct sk_buff *skb, struct net_device *dev)
1076 struct xgmac_priv *priv = netdev_priv(dev);
1080 int nfrags = skb_shinfo(skb)->nr_frags;
1081 struct xgmac_dma_desc *desc, *first;
1082 unsigned int desc_flags;
1086 priv->tx_irq_cnt = (priv->tx_irq_cnt + 1) & (DMA_TX_RING_SZ/4 - 1);
1087 irq_flag = priv->tx_irq_cnt ? 0 : TXDESC_INTERRUPT;
1089 desc_flags = (skb->ip_summed == CHECKSUM_PARTIAL) ?
1090 TXDESC_CSUM_ALL : 0;
1091 entry = priv->tx_head;
1092 desc = priv->dma_tx + entry;
1095 len = skb_headlen(skb);
1096 paddr = dma_map_single(priv->device, skb->data, len, DMA_TO_DEVICE);
1097 if (dma_mapping_error(priv->device, paddr)) {
1101 priv->tx_skbuff[entry] = skb;
1102 desc_set_buf_addr_and_size(desc, paddr, len);
1104 for (i = 0; i < nfrags; i++) {
1105 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1109 paddr = skb_frag_dma_map(priv->device, frag, 0, len,
1111 if (dma_mapping_error(priv->device, paddr)) {
1116 entry = dma_ring_incr(entry, DMA_TX_RING_SZ);
1117 desc = priv->dma_tx + entry;
1118 priv->tx_skbuff[entry] = skb;
1120 desc_set_buf_addr_and_size(desc, paddr, len);
1121 if (i < (nfrags - 1))
1122 desc_set_tx_owner(desc, desc_flags);
1125 /* Interrupt on completition only for the latest segment */
1127 desc_set_tx_owner(desc, desc_flags |
1128 TXDESC_LAST_SEG | irq_flag);
1130 desc_flags |= TXDESC_LAST_SEG | irq_flag;
1132 /* Set owner on first desc last to avoid race condition */
1134 desc_set_tx_owner(first, desc_flags | TXDESC_FIRST_SEG);
1136 writel(1, priv->base + XGMAC_DMA_TX_POLL);
1138 priv->tx_head = dma_ring_incr(entry, DMA_TX_RING_SZ);
1140 /* Ensure tx_head update is visible to tx completion */
1142 if (unlikely(tx_dma_ring_space(priv) <= MAX_SKB_FRAGS)) {
1143 netif_stop_queue(dev);
1144 /* Ensure netif_stop_queue is visible to tx completion */
1146 if (tx_dma_ring_space(priv) > MAX_SKB_FRAGS)
1147 netif_start_queue(dev);
1149 return NETDEV_TX_OK;
1152 static int xgmac_rx(struct xgmac_priv *priv, int limit)
1155 unsigned int count = 0;
1156 struct xgmac_dma_desc *p;
1158 while (count < limit) {
1160 struct sk_buff *skb;
1163 if (!dma_ring_cnt(priv->rx_head, priv->rx_tail, DMA_RX_RING_SZ))
1166 entry = priv->rx_tail;
1167 p = priv->dma_rx + entry;
1168 if (desc_get_owner(p))
1172 priv->rx_tail = dma_ring_incr(priv->rx_tail, DMA_RX_RING_SZ);
1174 /* read the status of the incoming frame */
1175 ip_checksum = desc_get_rx_status(priv, p);
1176 if (ip_checksum < 0)
1179 skb = priv->rx_skbuff[entry];
1180 if (unlikely(!skb)) {
1181 netdev_err(priv->dev, "Inconsistent Rx descriptor chain\n");
1184 priv->rx_skbuff[entry] = NULL;
1186 frame_len = desc_get_rx_frame_len(p);
1187 netdev_dbg(priv->dev, "RX frame size %d, COE status: %d\n",
1188 frame_len, ip_checksum);
1190 skb_put(skb, frame_len);
1191 dma_unmap_single(priv->device, desc_get_buf_addr(p),
1192 frame_len, DMA_FROM_DEVICE);
1194 skb->protocol = eth_type_trans(skb, priv->dev);
1195 skb->ip_summed = ip_checksum;
1196 if (ip_checksum == CHECKSUM_NONE)
1197 netif_receive_skb(skb);
1199 napi_gro_receive(&priv->napi, skb);
1202 xgmac_rx_refill(priv);
1208 * xgmac_poll - xgmac poll method (NAPI)
1209 * @napi : pointer to the napi structure.
1210 * @budget : maximum number of packets that the current CPU can receive from
1213 * This function implements the the reception process.
1214 * Also it runs the TX completion thread
1216 static int xgmac_poll(struct napi_struct *napi, int budget)
1218 struct xgmac_priv *priv = container_of(napi,
1219 struct xgmac_priv, napi);
1222 xgmac_tx_complete(priv);
1223 work_done = xgmac_rx(priv, budget);
1225 if (work_done < budget) {
1226 napi_complete(napi);
1227 __raw_writel(DMA_INTR_DEFAULT_MASK, priv->base + XGMAC_DMA_INTR_ENA);
1234 * @dev : Pointer to net device structure
1235 * Description: this function is called when a packet transmission fails to
1236 * complete within a reasonable tmrate. The driver will mark the error in the
1237 * netdev structure and arrange for the device to be reset to a sane state
1238 * in order to transmit a new packet.
1240 static void xgmac_tx_timeout(struct net_device *dev)
1242 struct xgmac_priv *priv = netdev_priv(dev);
1243 schedule_work(&priv->tx_timeout_work);
1247 * xgmac_set_rx_mode - entry point for multicast addressing
1248 * @dev : pointer to the device structure
1250 * This function is a driver entry point which gets called by the kernel
1251 * whenever multicast addresses must be enabled/disabled.
1255 static void xgmac_set_rx_mode(struct net_device *dev)
1258 struct xgmac_priv *priv = netdev_priv(dev);
1259 void __iomem *ioaddr = priv->base;
1260 unsigned int value = 0;
1261 u32 hash_filter[XGMAC_NUM_HASH];
1263 struct netdev_hw_addr *ha;
1264 bool use_hash = false;
1266 netdev_dbg(priv->dev, "# mcasts %d, # unicast %d\n",
1267 netdev_mc_count(dev), netdev_uc_count(dev));
1269 if (dev->flags & IFF_PROMISC) {
1270 writel(XGMAC_FRAME_FILTER_PR, ioaddr + XGMAC_FRAME_FILTER);
1274 memset(hash_filter, 0, sizeof(hash_filter));
1276 if (netdev_uc_count(dev) > XGMAC_MAX_FILTER_ADDR) {
1278 value |= XGMAC_FRAME_FILTER_HUC | XGMAC_FRAME_FILTER_HPF;
1280 netdev_for_each_uc_addr(ha, dev) {
1282 u32 bit_nr = ~ether_crc(ETH_ALEN, ha->addr) >> 23;
1284 /* The most significant 4 bits determine the register to
1285 * use (H/L) while the other 5 bits determine the bit
1286 * within the register. */
1287 hash_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
1289 xgmac_set_mac_addr(ioaddr, ha->addr, reg);
1294 if (dev->flags & IFF_ALLMULTI) {
1295 value |= XGMAC_FRAME_FILTER_PM;
1299 if ((netdev_mc_count(dev) + reg - 1) > XGMAC_MAX_FILTER_ADDR) {
1301 value |= XGMAC_FRAME_FILTER_HMC | XGMAC_FRAME_FILTER_HPF;
1305 netdev_for_each_mc_addr(ha, dev) {
1307 u32 bit_nr = ~ether_crc(ETH_ALEN, ha->addr) >> 23;
1309 /* The most significant 4 bits determine the register to
1310 * use (H/L) while the other 5 bits determine the bit
1311 * within the register. */
1312 hash_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
1314 xgmac_set_mac_addr(ioaddr, ha->addr, reg);
1320 for (i = reg; i < XGMAC_MAX_FILTER_ADDR; i++)
1321 xgmac_set_mac_addr(ioaddr, NULL, reg);
1322 for (i = 0; i < XGMAC_NUM_HASH; i++)
1323 writel(hash_filter[i], ioaddr + XGMAC_HASH(i));
1325 writel(value, ioaddr + XGMAC_FRAME_FILTER);
1329 * xgmac_change_mtu - entry point to change MTU size for the device.
1330 * @dev : device pointer.
1331 * @new_mtu : the new MTU size for the device.
1332 * Description: the Maximum Transfer Unit (MTU) is used by the network layer
1333 * to drive packet transmission. Ethernet has an MTU of 1500 octets
1334 * (ETH_DATA_LEN). This value can be changed with ifconfig.
1336 * 0 on success and an appropriate (-)ve integer as defined in errno.h
1339 static int xgmac_change_mtu(struct net_device *dev, int new_mtu)
1341 struct xgmac_priv *priv = netdev_priv(dev);
1344 if ((new_mtu < 46) || (new_mtu > MAX_MTU)) {
1345 netdev_err(priv->dev, "invalid MTU, max MTU is: %d\n", MAX_MTU);
1352 /* return early if the buffer sizes will not change */
1353 if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN)
1355 if (old_mtu == new_mtu)
1358 /* Stop everything, get ready to change the MTU */
1359 if (!netif_running(dev))
1362 /* Bring the interface down and then back up */
1364 return xgmac_open(dev);
1367 static irqreturn_t xgmac_pmt_interrupt(int irq, void *dev_id)
1370 struct net_device *dev = (struct net_device *)dev_id;
1371 struct xgmac_priv *priv = netdev_priv(dev);
1372 void __iomem *ioaddr = priv->base;
1374 intr_status = __raw_readl(ioaddr + XGMAC_INT_STAT);
1375 if (intr_status & XGMAC_INT_STAT_PMT) {
1376 netdev_dbg(priv->dev, "received Magic frame\n");
1377 /* clear the PMT bits 5 and 6 by reading the PMT */
1378 readl(ioaddr + XGMAC_PMT);
1383 static irqreturn_t xgmac_interrupt(int irq, void *dev_id)
1386 struct net_device *dev = (struct net_device *)dev_id;
1387 struct xgmac_priv *priv = netdev_priv(dev);
1388 struct xgmac_extra_stats *x = &priv->xstats;
1390 /* read the status register (CSR5) */
1391 intr_status = __raw_readl(priv->base + XGMAC_DMA_STATUS);
1392 intr_status &= __raw_readl(priv->base + XGMAC_DMA_INTR_ENA);
1393 __raw_writel(intr_status, priv->base + XGMAC_DMA_STATUS);
1395 /* It displays the DMA process states (CSR5 register) */
1396 /* ABNORMAL interrupts */
1397 if (unlikely(intr_status & DMA_STATUS_AIS)) {
1398 if (intr_status & DMA_STATUS_TJT) {
1399 netdev_err(priv->dev, "transmit jabber\n");
1402 if (intr_status & DMA_STATUS_RU)
1404 if (intr_status & DMA_STATUS_RPS) {
1405 netdev_err(priv->dev, "receive process stopped\n");
1406 x->rx_process_stopped++;
1408 if (intr_status & DMA_STATUS_ETI) {
1409 netdev_err(priv->dev, "transmit early interrupt\n");
1412 if (intr_status & DMA_STATUS_TPS) {
1413 netdev_err(priv->dev, "transmit process stopped\n");
1414 x->tx_process_stopped++;
1415 schedule_work(&priv->tx_timeout_work);
1417 if (intr_status & DMA_STATUS_FBI) {
1418 netdev_err(priv->dev, "fatal bus error\n");
1419 x->fatal_bus_error++;
1423 /* TX/RX NORMAL interrupts */
1424 if (intr_status & (DMA_STATUS_RI | DMA_STATUS_TU | DMA_STATUS_TI)) {
1425 __raw_writel(DMA_INTR_ABNORMAL, priv->base + XGMAC_DMA_INTR_ENA);
1426 napi_schedule(&priv->napi);
1432 #ifdef CONFIG_NET_POLL_CONTROLLER
1433 /* Polling receive - used by NETCONSOLE and other diagnostic tools
1434 * to allow network I/O with interrupts disabled. */
1435 static void xgmac_poll_controller(struct net_device *dev)
1437 disable_irq(dev->irq);
1438 xgmac_interrupt(dev->irq, dev);
1439 enable_irq(dev->irq);
1443 static struct rtnl_link_stats64 *
1444 xgmac_get_stats64(struct net_device *dev,
1445 struct rtnl_link_stats64 *storage)
1447 struct xgmac_priv *priv = netdev_priv(dev);
1448 void __iomem *base = priv->base;
1451 spin_lock_bh(&priv->stats_lock);
1452 writel(XGMAC_MMC_CTRL_CNT_FRZ, base + XGMAC_MMC_CTRL);
1454 storage->rx_bytes = readl(base + XGMAC_MMC_RXOCTET_G_LO);
1455 storage->rx_bytes |= (u64)(readl(base + XGMAC_MMC_RXOCTET_G_HI)) << 32;
1457 storage->rx_packets = readl(base + XGMAC_MMC_RXFRAME_GB_LO);
1458 storage->multicast = readl(base + XGMAC_MMC_RXMCFRAME_G);
1459 storage->rx_crc_errors = readl(base + XGMAC_MMC_RXCRCERR);
1460 storage->rx_length_errors = readl(base + XGMAC_MMC_RXLENGTHERR);
1461 storage->rx_missed_errors = readl(base + XGMAC_MMC_RXOVERFLOW);
1463 storage->tx_bytes = readl(base + XGMAC_MMC_TXOCTET_G_LO);
1464 storage->tx_bytes |= (u64)(readl(base + XGMAC_MMC_TXOCTET_G_HI)) << 32;
1466 count = readl(base + XGMAC_MMC_TXFRAME_GB_LO);
1467 storage->tx_errors = count - readl(base + XGMAC_MMC_TXFRAME_G_LO);
1468 storage->tx_packets = count;
1469 storage->tx_fifo_errors = readl(base + XGMAC_MMC_TXUNDERFLOW);
1471 writel(0, base + XGMAC_MMC_CTRL);
1472 spin_unlock_bh(&priv->stats_lock);
1476 static int xgmac_set_mac_address(struct net_device *dev, void *p)
1478 struct xgmac_priv *priv = netdev_priv(dev);
1479 void __iomem *ioaddr = priv->base;
1480 struct sockaddr *addr = p;
1482 if (!is_valid_ether_addr(addr->sa_data))
1483 return -EADDRNOTAVAIL;
1485 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1487 xgmac_set_mac_addr(ioaddr, dev->dev_addr, 0);
1492 static int xgmac_set_features(struct net_device *dev, netdev_features_t features)
1495 struct xgmac_priv *priv = netdev_priv(dev);
1496 void __iomem *ioaddr = priv->base;
1497 netdev_features_t changed = dev->features ^ features;
1499 if (!(changed & NETIF_F_RXCSUM))
1502 ctrl = readl(ioaddr + XGMAC_CONTROL);
1503 if (features & NETIF_F_RXCSUM)
1504 ctrl |= XGMAC_CONTROL_IPC;
1506 ctrl &= ~XGMAC_CONTROL_IPC;
1507 writel(ctrl, ioaddr + XGMAC_CONTROL);
1512 static const struct net_device_ops xgmac_netdev_ops = {
1513 .ndo_open = xgmac_open,
1514 .ndo_start_xmit = xgmac_xmit,
1515 .ndo_stop = xgmac_stop,
1516 .ndo_change_mtu = xgmac_change_mtu,
1517 .ndo_set_rx_mode = xgmac_set_rx_mode,
1518 .ndo_tx_timeout = xgmac_tx_timeout,
1519 .ndo_get_stats64 = xgmac_get_stats64,
1520 #ifdef CONFIG_NET_POLL_CONTROLLER
1521 .ndo_poll_controller = xgmac_poll_controller,
1523 .ndo_set_mac_address = xgmac_set_mac_address,
1524 .ndo_set_features = xgmac_set_features,
1527 static int xgmac_ethtool_getsettings(struct net_device *dev,
1528 struct ethtool_cmd *cmd)
1531 cmd->duplex = DUPLEX_FULL;
1532 ethtool_cmd_speed_set(cmd, 10000);
1534 cmd->advertising = 0;
1535 cmd->transceiver = XCVR_INTERNAL;
1539 static void xgmac_get_pauseparam(struct net_device *netdev,
1540 struct ethtool_pauseparam *pause)
1542 struct xgmac_priv *priv = netdev_priv(netdev);
1544 pause->rx_pause = priv->rx_pause;
1545 pause->tx_pause = priv->tx_pause;
1548 static int xgmac_set_pauseparam(struct net_device *netdev,
1549 struct ethtool_pauseparam *pause)
1551 struct xgmac_priv *priv = netdev_priv(netdev);
1556 return xgmac_set_flow_ctrl(priv, pause->rx_pause, pause->tx_pause);
1559 struct xgmac_stats {
1560 char stat_string[ETH_GSTRING_LEN];
1565 #define XGMAC_STAT(m) \
1566 { #m, offsetof(struct xgmac_priv, xstats.m), false }
1567 #define XGMAC_HW_STAT(m, reg_offset) \
1568 { #m, reg_offset, true }
1570 static const struct xgmac_stats xgmac_gstrings_stats[] = {
1571 XGMAC_STAT(tx_frame_flushed),
1572 XGMAC_STAT(tx_payload_error),
1573 XGMAC_STAT(tx_ip_header_error),
1574 XGMAC_STAT(tx_local_fault),
1575 XGMAC_STAT(tx_remote_fault),
1576 XGMAC_STAT(tx_early),
1577 XGMAC_STAT(tx_process_stopped),
1578 XGMAC_STAT(tx_jabber),
1579 XGMAC_STAT(rx_buf_unav),
1580 XGMAC_STAT(rx_process_stopped),
1581 XGMAC_STAT(rx_payload_error),
1582 XGMAC_STAT(rx_ip_header_error),
1583 XGMAC_STAT(rx_da_filter_fail),
1584 XGMAC_STAT(rx_sa_filter_fail),
1585 XGMAC_STAT(fatal_bus_error),
1586 XGMAC_HW_STAT(rx_watchdog, XGMAC_MMC_RXWATCHDOG),
1587 XGMAC_HW_STAT(tx_vlan, XGMAC_MMC_TXVLANFRAME),
1588 XGMAC_HW_STAT(rx_vlan, XGMAC_MMC_RXVLANFRAME),
1589 XGMAC_HW_STAT(tx_pause, XGMAC_MMC_TXPAUSEFRAME),
1590 XGMAC_HW_STAT(rx_pause, XGMAC_MMC_RXPAUSEFRAME),
1592 #define XGMAC_STATS_LEN ARRAY_SIZE(xgmac_gstrings_stats)
1594 static void xgmac_get_ethtool_stats(struct net_device *dev,
1595 struct ethtool_stats *dummy,
1598 struct xgmac_priv *priv = netdev_priv(dev);
1602 for (i = 0; i < XGMAC_STATS_LEN; i++) {
1603 if (xgmac_gstrings_stats[i].is_reg)
1604 *data++ = readl(priv->base +
1605 xgmac_gstrings_stats[i].stat_offset);
1607 *data++ = *(u32 *)(p +
1608 xgmac_gstrings_stats[i].stat_offset);
1612 static int xgmac_get_sset_count(struct net_device *netdev, int sset)
1616 return XGMAC_STATS_LEN;
1622 static void xgmac_get_strings(struct net_device *dev, u32 stringset,
1628 switch (stringset) {
1630 for (i = 0; i < XGMAC_STATS_LEN; i++) {
1631 memcpy(p, xgmac_gstrings_stats[i].stat_string,
1633 p += ETH_GSTRING_LEN;
1642 static void xgmac_get_wol(struct net_device *dev,
1643 struct ethtool_wolinfo *wol)
1645 struct xgmac_priv *priv = netdev_priv(dev);
1647 if (device_can_wakeup(priv->device)) {
1648 wol->supported = WAKE_MAGIC | WAKE_UCAST;
1649 wol->wolopts = priv->wolopts;
1653 static int xgmac_set_wol(struct net_device *dev,
1654 struct ethtool_wolinfo *wol)
1656 struct xgmac_priv *priv = netdev_priv(dev);
1657 u32 support = WAKE_MAGIC | WAKE_UCAST;
1659 if (!device_can_wakeup(priv->device))
1662 if (wol->wolopts & ~support)
1665 priv->wolopts = wol->wolopts;
1668 device_set_wakeup_enable(priv->device, 1);
1669 enable_irq_wake(dev->irq);
1671 device_set_wakeup_enable(priv->device, 0);
1672 disable_irq_wake(dev->irq);
1678 static const struct ethtool_ops xgmac_ethtool_ops = {
1679 .get_settings = xgmac_ethtool_getsettings,
1680 .get_link = ethtool_op_get_link,
1681 .get_pauseparam = xgmac_get_pauseparam,
1682 .set_pauseparam = xgmac_set_pauseparam,
1683 .get_ethtool_stats = xgmac_get_ethtool_stats,
1684 .get_strings = xgmac_get_strings,
1685 .get_wol = xgmac_get_wol,
1686 .set_wol = xgmac_set_wol,
1687 .get_sset_count = xgmac_get_sset_count,
1692 * @pdev: platform device pointer
1693 * Description: the driver is initialized through platform_device.
1695 static int xgmac_probe(struct platform_device *pdev)
1698 struct resource *res;
1699 struct net_device *ndev = NULL;
1700 struct xgmac_priv *priv = NULL;
1703 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1707 if (!request_mem_region(res->start, resource_size(res), pdev->name))
1710 ndev = alloc_etherdev(sizeof(struct xgmac_priv));
1716 SET_NETDEV_DEV(ndev, &pdev->dev);
1717 priv = netdev_priv(ndev);
1718 platform_set_drvdata(pdev, ndev);
1720 ndev->netdev_ops = &xgmac_netdev_ops;
1721 SET_ETHTOOL_OPS(ndev, &xgmac_ethtool_ops);
1722 spin_lock_init(&priv->stats_lock);
1723 INIT_WORK(&priv->tx_timeout_work, xgmac_tx_timeout_work);
1725 priv->device = &pdev->dev;
1730 priv->base = ioremap(res->start, resource_size(res));
1732 netdev_err(ndev, "ioremap failed\n");
1737 uid = readl(priv->base + XGMAC_VERSION);
1738 netdev_info(ndev, "h/w version is 0x%x\n", uid);
1740 writel(0, priv->base + XGMAC_DMA_INTR_ENA);
1741 ndev->irq = platform_get_irq(pdev, 0);
1742 if (ndev->irq == -ENXIO) {
1743 netdev_err(ndev, "No irq resource\n");
1748 ret = request_irq(ndev->irq, xgmac_interrupt, 0,
1749 dev_name(&pdev->dev), ndev);
1751 netdev_err(ndev, "Could not request irq %d - ret %d)\n",
1756 priv->pmt_irq = platform_get_irq(pdev, 1);
1757 if (priv->pmt_irq == -ENXIO) {
1758 netdev_err(ndev, "No pmt irq resource\n");
1759 ret = priv->pmt_irq;
1763 ret = request_irq(priv->pmt_irq, xgmac_pmt_interrupt, 0,
1764 dev_name(&pdev->dev), ndev);
1766 netdev_err(ndev, "Could not request irq %d - ret %d)\n",
1767 priv->pmt_irq, ret);
1771 device_set_wakeup_capable(&pdev->dev, 1);
1772 if (device_can_wakeup(priv->device))
1773 priv->wolopts = WAKE_MAGIC; /* Magic Frame as default */
1775 ndev->hw_features = NETIF_F_SG | NETIF_F_HIGHDMA;
1776 if (readl(priv->base + XGMAC_DMA_HW_FEATURE) & DMA_HW_FEAT_TXCOESEL)
1777 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1779 ndev->features |= ndev->hw_features;
1780 ndev->priv_flags |= IFF_UNICAST_FLT;
1782 /* Get the MAC address */
1783 xgmac_get_mac_addr(priv->base, ndev->dev_addr, 0);
1784 if (!is_valid_ether_addr(ndev->dev_addr))
1785 netdev_warn(ndev, "MAC address %pM not valid",
1788 netif_napi_add(ndev, &priv->napi, xgmac_poll, 64);
1789 ret = register_netdev(ndev);
1796 netif_napi_del(&priv->napi);
1797 free_irq(priv->pmt_irq, ndev);
1799 free_irq(ndev->irq, ndev);
1801 iounmap(priv->base);
1805 release_mem_region(res->start, resource_size(res));
1811 * @pdev: platform device pointer
1812 * Description: this function resets the TX/RX processes, disables the MAC RX/TX
1813 * changes the link status, releases the DMA descriptor rings,
1814 * unregisters the MDIO bus and unmaps the allocated memory.
1816 static int xgmac_remove(struct platform_device *pdev)
1818 struct net_device *ndev = platform_get_drvdata(pdev);
1819 struct xgmac_priv *priv = netdev_priv(ndev);
1820 struct resource *res;
1822 xgmac_mac_disable(priv->base);
1824 /* Free the IRQ lines */
1825 free_irq(ndev->irq, ndev);
1826 free_irq(priv->pmt_irq, ndev);
1828 unregister_netdev(ndev);
1829 netif_napi_del(&priv->napi);
1831 iounmap(priv->base);
1832 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1833 release_mem_region(res->start, resource_size(res));
1840 #ifdef CONFIG_PM_SLEEP
1841 static void xgmac_pmt(void __iomem *ioaddr, unsigned long mode)
1843 unsigned int pmt = 0;
1845 if (mode & WAKE_MAGIC)
1846 pmt |= XGMAC_PMT_POWERDOWN | XGMAC_PMT_MAGIC_PKT_EN;
1847 if (mode & WAKE_UCAST)
1848 pmt |= XGMAC_PMT_POWERDOWN | XGMAC_PMT_GLBL_UNICAST;
1850 writel(pmt, ioaddr + XGMAC_PMT);
1853 static int xgmac_suspend(struct device *dev)
1855 struct net_device *ndev = platform_get_drvdata(to_platform_device(dev));
1856 struct xgmac_priv *priv = netdev_priv(ndev);
1859 if (!ndev || !netif_running(ndev))
1862 netif_device_detach(ndev);
1863 napi_disable(&priv->napi);
1864 writel(0, priv->base + XGMAC_DMA_INTR_ENA);
1866 if (device_may_wakeup(priv->device)) {
1867 /* Stop TX/RX DMA Only */
1868 value = readl(priv->base + XGMAC_DMA_CONTROL);
1869 value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR);
1870 writel(value, priv->base + XGMAC_DMA_CONTROL);
1872 xgmac_pmt(priv->base, priv->wolopts);
1874 xgmac_mac_disable(priv->base);
1879 static int xgmac_resume(struct device *dev)
1881 struct net_device *ndev = platform_get_drvdata(to_platform_device(dev));
1882 struct xgmac_priv *priv = netdev_priv(ndev);
1883 void __iomem *ioaddr = priv->base;
1885 if (!netif_running(ndev))
1888 xgmac_pmt(ioaddr, 0);
1890 /* Enable the MAC and DMA */
1891 xgmac_mac_enable(ioaddr);
1892 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS);
1893 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA);
1895 netif_device_attach(ndev);
1896 napi_enable(&priv->napi);
1900 #endif /* CONFIG_PM_SLEEP */
1902 static SIMPLE_DEV_PM_OPS(xgmac_pm_ops, xgmac_suspend, xgmac_resume);
1904 static const struct of_device_id xgmac_of_match[] = {
1905 { .compatible = "calxeda,hb-xgmac", },
1908 MODULE_DEVICE_TABLE(of, xgmac_of_match);
1910 static struct platform_driver xgmac_driver = {
1912 .name = "calxedaxgmac",
1913 .of_match_table = xgmac_of_match,
1915 .probe = xgmac_probe,
1916 .remove = xgmac_remove,
1917 .driver.pm = &xgmac_pm_ops,
1920 module_platform_driver(xgmac_driver);
1922 MODULE_AUTHOR("Calxeda, Inc.");
1923 MODULE_DESCRIPTION("Calxeda 10G XGMAC driver");
1924 MODULE_LICENSE("GPL v2");