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1 | /* |
2 | * Copyright 2010-2011 Calxeda, Inc. | |
3 | * | |
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. | |
7 | * | |
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 | |
11 | * more details. | |
12 | * | |
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/>. | |
15 | */ | |
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> | |
25 | #include <linux/if.h> | |
26 | #include <linux/crc32.h> | |
27 | #include <linux/dma-mapping.h> | |
28 | #include <linux/slab.h> | |
29 | ||
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 */ | |
55 | ||
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 | |
73 | ||
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 | |
92 | ||
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 */ | |
107 | ||
108 | #define XGMAC_ADDR_AE 0x80000000 | |
109 | #define XGMAC_MAX_FILTER_ADDR 31 | |
110 | ||
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 | |
119 | ||
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 */ | |
139 | ||
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 */ | |
153 | ||
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 ... */ | |
164 | ||
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 */ | |
168 | ||
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 */ | |
174 | ||
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 | |
184 | ||
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 */ | |
189 | ||
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 */ | |
0aefa8ec | 194 | #define DMA_CONTROL_OSF 0x00000004 /* Operate on 2nd tx frame */ |
85c10f28 RH |
195 | |
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 */ | |
212 | ||
213 | #define DMA_INTR_NORMAL (DMA_INTR_ENA_NIE | DMA_INTR_ENA_RIE | \ | |
97a3a9a6 | 214 | DMA_INTR_ENA_TUE | DMA_INTR_ENA_TIE) |
85c10f28 RH |
215 | |
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 | \ | |
220 | DMA_INTR_ENA_TSE) | |
221 | ||
222 | /* DMA default interrupt mask */ | |
223 | #define DMA_INTR_DEFAULT_MASK (DMA_INTR_NORMAL | DMA_INTR_ABNORMAL) | |
224 | ||
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 */ | |
250 | ||
251 | /* Common MAC defines */ | |
252 | #define MAC_ENABLE_TX 0x00000008 /* Transmitter Enable */ | |
253 | #define MAC_ENABLE_RX 0x00000004 /* Receiver Enable */ | |
254 | ||
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 */ | |
f62a23a7 | 268 | #define XGMAC_OMR_RTC_256 0x00000018 /* RX Threshhold Ctrl */ |
85c10f28 RH |
269 | #define XGMAC_OMR_RTC_MASK 0x00000018 /* RX Threshhold Ctrl MASK */ |
270 | ||
271 | /* XGMAC HW Features Register */ | |
272 | #define DMA_HW_FEAT_TXCOESEL 0x00010000 /* TX Checksum offload */ | |
273 | ||
274 | #define XGMAC_MMC_CTRL_CNT_FRZ 0x00000008 | |
275 | ||
276 | /* XGMAC Descriptor Defines */ | |
277 | #define MAX_DESC_BUF_SZ (0x2000 - 8) | |
278 | ||
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 | |
296 | ||
297 | #define RXDESC1_END_RING 0x00008000 | |
298 | ||
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 | |
329 | ||
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 | |
334 | ||
335 | struct xgmac_dma_desc { | |
336 | __le32 flags; | |
337 | __le32 buf_size; | |
338 | __le32 buf1_addr; /* Buffer 1 Address Pointer */ | |
339 | __le32 buf2_addr; /* Buffer 2 Address Pointer */ | |
340 | __le32 ext_status; | |
341 | __le32 res[3]; | |
342 | }; | |
343 | ||
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; | |
352 | /* Receive errors */ | |
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; | |
365 | }; | |
366 | ||
367 | struct xgmac_priv { | |
368 | struct xgmac_dma_desc *dma_rx; | |
369 | struct sk_buff **rx_skbuff; | |
370 | unsigned int rx_tail; | |
371 | unsigned int rx_head; | |
372 | ||
373 | struct xgmac_dma_desc *dma_tx; | |
374 | struct sk_buff **tx_skbuff; | |
375 | unsigned int tx_head; | |
376 | unsigned int tx_tail; | |
97a3a9a6 | 377 | int tx_irq_cnt; |
85c10f28 RH |
378 | |
379 | void __iomem *base; | |
85c10f28 RH |
380 | unsigned int dma_buf_sz; |
381 | dma_addr_t dma_rx_phy; | |
382 | dma_addr_t dma_tx_phy; | |
383 | ||
384 | struct net_device *dev; | |
385 | struct device *device; | |
386 | struct napi_struct napi; | |
387 | ||
388 | struct xgmac_extra_stats xstats; | |
389 | ||
390 | spinlock_t stats_lock; | |
391 | int pmt_irq; | |
392 | char rx_pause; | |
393 | char tx_pause; | |
394 | int wolopts; | |
395 | }; | |
396 | ||
397 | /* XGMAC Configuration Settings */ | |
398 | #define MAX_MTU 9000 | |
399 | #define PAUSE_TIME 0x400 | |
400 | ||
401 | #define DMA_RX_RING_SZ 256 | |
402 | #define DMA_TX_RING_SZ 128 | |
403 | /* minimum number of free TX descriptors required to wake up TX process */ | |
404 | #define TX_THRESH (DMA_TX_RING_SZ/4) | |
405 | ||
406 | /* DMA descriptor ring helpers */ | |
407 | #define dma_ring_incr(n, s) (((n) + 1) & ((s) - 1)) | |
408 | #define dma_ring_space(h, t, s) CIRC_SPACE(h, t, s) | |
409 | #define dma_ring_cnt(h, t, s) CIRC_CNT(h, t, s) | |
410 | ||
411 | /* XGMAC Descriptor Access Helpers */ | |
412 | static inline void desc_set_buf_len(struct xgmac_dma_desc *p, u32 buf_sz) | |
413 | { | |
414 | if (buf_sz > MAX_DESC_BUF_SZ) | |
415 | p->buf_size = cpu_to_le32(MAX_DESC_BUF_SZ | | |
416 | (buf_sz - MAX_DESC_BUF_SZ) << DESC_BUFFER2_SZ_OFFSET); | |
417 | else | |
418 | p->buf_size = cpu_to_le32(buf_sz); | |
419 | } | |
420 | ||
421 | static inline int desc_get_buf_len(struct xgmac_dma_desc *p) | |
422 | { | |
423 | u32 len = cpu_to_le32(p->flags); | |
424 | return (len & DESC_BUFFER1_SZ_MASK) + | |
425 | ((len & DESC_BUFFER2_SZ_MASK) >> DESC_BUFFER2_SZ_OFFSET); | |
426 | } | |
427 | ||
428 | static inline void desc_init_rx_desc(struct xgmac_dma_desc *p, int ring_size, | |
429 | int buf_sz) | |
430 | { | |
431 | struct xgmac_dma_desc *end = p + ring_size - 1; | |
432 | ||
433 | memset(p, 0, sizeof(*p) * ring_size); | |
434 | ||
435 | for (; p <= end; p++) | |
436 | desc_set_buf_len(p, buf_sz); | |
437 | ||
438 | end->buf_size |= cpu_to_le32(RXDESC1_END_RING); | |
439 | } | |
440 | ||
441 | static inline void desc_init_tx_desc(struct xgmac_dma_desc *p, u32 ring_size) | |
442 | { | |
443 | memset(p, 0, sizeof(*p) * ring_size); | |
444 | p[ring_size - 1].flags = cpu_to_le32(TXDESC_END_RING); | |
445 | } | |
446 | ||
447 | static inline int desc_get_owner(struct xgmac_dma_desc *p) | |
448 | { | |
449 | return le32_to_cpu(p->flags) & DESC_OWN; | |
450 | } | |
451 | ||
452 | static inline void desc_set_rx_owner(struct xgmac_dma_desc *p) | |
453 | { | |
454 | /* Clear all fields and set the owner */ | |
455 | p->flags = cpu_to_le32(DESC_OWN); | |
456 | } | |
457 | ||
458 | static inline void desc_set_tx_owner(struct xgmac_dma_desc *p, u32 flags) | |
459 | { | |
460 | u32 tmpflags = le32_to_cpu(p->flags); | |
461 | tmpflags &= TXDESC_END_RING; | |
462 | tmpflags |= flags | DESC_OWN; | |
463 | p->flags = cpu_to_le32(tmpflags); | |
464 | } | |
465 | ||
466 | static inline int desc_get_tx_ls(struct xgmac_dma_desc *p) | |
467 | { | |
468 | return le32_to_cpu(p->flags) & TXDESC_LAST_SEG; | |
469 | } | |
470 | ||
471 | static inline u32 desc_get_buf_addr(struct xgmac_dma_desc *p) | |
472 | { | |
473 | return le32_to_cpu(p->buf1_addr); | |
474 | } | |
475 | ||
476 | static inline void desc_set_buf_addr(struct xgmac_dma_desc *p, | |
477 | u32 paddr, int len) | |
478 | { | |
479 | p->buf1_addr = cpu_to_le32(paddr); | |
480 | if (len > MAX_DESC_BUF_SZ) | |
481 | p->buf2_addr = cpu_to_le32(paddr + MAX_DESC_BUF_SZ); | |
482 | } | |
483 | ||
484 | static inline void desc_set_buf_addr_and_size(struct xgmac_dma_desc *p, | |
485 | u32 paddr, int len) | |
486 | { | |
487 | desc_set_buf_len(p, len); | |
488 | desc_set_buf_addr(p, paddr, len); | |
489 | } | |
490 | ||
491 | static inline int desc_get_rx_frame_len(struct xgmac_dma_desc *p) | |
492 | { | |
493 | u32 data = le32_to_cpu(p->flags); | |
494 | u32 len = (data & RXDESC_FRAME_LEN_MASK) >> RXDESC_FRAME_LEN_OFFSET; | |
495 | if (data & RXDESC_FRAME_TYPE) | |
496 | len -= ETH_FCS_LEN; | |
497 | ||
498 | return len; | |
499 | } | |
500 | ||
501 | static void xgmac_dma_flush_tx_fifo(void __iomem *ioaddr) | |
502 | { | |
503 | int timeout = 1000; | |
504 | u32 reg = readl(ioaddr + XGMAC_OMR); | |
505 | writel(reg | XGMAC_OMR_FTF, ioaddr + XGMAC_OMR); | |
506 | ||
507 | while ((timeout-- > 0) && readl(ioaddr + XGMAC_OMR) & XGMAC_OMR_FTF) | |
508 | udelay(1); | |
509 | } | |
510 | ||
511 | static int desc_get_tx_status(struct xgmac_priv *priv, struct xgmac_dma_desc *p) | |
512 | { | |
513 | struct xgmac_extra_stats *x = &priv->xstats; | |
514 | u32 status = le32_to_cpu(p->flags); | |
515 | ||
516 | if (!(status & TXDESC_ERROR_SUMMARY)) | |
517 | return 0; | |
518 | ||
519 | netdev_dbg(priv->dev, "tx desc error = 0x%08x\n", status); | |
520 | if (status & TXDESC_JABBER_TIMEOUT) | |
521 | x->tx_jabber++; | |
522 | if (status & TXDESC_FRAME_FLUSHED) | |
523 | x->tx_frame_flushed++; | |
524 | if (status & TXDESC_UNDERFLOW_ERR) | |
525 | xgmac_dma_flush_tx_fifo(priv->base); | |
526 | if (status & TXDESC_IP_HEADER_ERR) | |
527 | x->tx_ip_header_error++; | |
528 | if (status & TXDESC_LOCAL_FAULT) | |
529 | x->tx_local_fault++; | |
530 | if (status & TXDESC_REMOTE_FAULT) | |
531 | x->tx_remote_fault++; | |
532 | if (status & TXDESC_PAYLOAD_CSUM_ERR) | |
533 | x->tx_payload_error++; | |
534 | ||
535 | return -1; | |
536 | } | |
537 | ||
538 | static int desc_get_rx_status(struct xgmac_priv *priv, struct xgmac_dma_desc *p) | |
539 | { | |
540 | struct xgmac_extra_stats *x = &priv->xstats; | |
541 | int ret = CHECKSUM_UNNECESSARY; | |
542 | u32 status = le32_to_cpu(p->flags); | |
543 | u32 ext_status = le32_to_cpu(p->ext_status); | |
544 | ||
545 | if (status & RXDESC_DA_FILTER_FAIL) { | |
546 | netdev_dbg(priv->dev, "XGMAC RX : Dest Address filter fail\n"); | |
547 | x->rx_da_filter_fail++; | |
548 | return -1; | |
549 | } | |
550 | ||
551 | /* Check if packet has checksum already */ | |
552 | if ((status & RXDESC_FRAME_TYPE) && (status & RXDESC_EXT_STATUS) && | |
553 | !(ext_status & RXDESC_IP_PAYLOAD_MASK)) | |
554 | ret = CHECKSUM_NONE; | |
555 | ||
556 | netdev_dbg(priv->dev, "rx status - frame type=%d, csum = %d, ext stat %08x\n", | |
557 | (status & RXDESC_FRAME_TYPE) ? 1 : 0, ret, ext_status); | |
558 | ||
559 | if (!(status & RXDESC_ERROR_SUMMARY)) | |
560 | return ret; | |
561 | ||
562 | /* Handle any errors */ | |
563 | if (status & (RXDESC_DESCRIPTOR_ERR | RXDESC_OVERFLOW_ERR | | |
564 | RXDESC_GIANT_FRAME | RXDESC_LENGTH_ERR | RXDESC_CRC_ERR)) | |
565 | return -1; | |
566 | ||
567 | if (status & RXDESC_EXT_STATUS) { | |
568 | if (ext_status & RXDESC_IP_HEADER_ERR) | |
569 | x->rx_ip_header_error++; | |
570 | if (ext_status & RXDESC_IP_PAYLOAD_ERR) | |
571 | x->rx_payload_error++; | |
572 | netdev_dbg(priv->dev, "IP checksum error - stat %08x\n", | |
573 | ext_status); | |
574 | return CHECKSUM_NONE; | |
575 | } | |
576 | ||
577 | return ret; | |
578 | } | |
579 | ||
580 | static inline void xgmac_mac_enable(void __iomem *ioaddr) | |
581 | { | |
582 | u32 value = readl(ioaddr + XGMAC_CONTROL); | |
583 | value |= MAC_ENABLE_RX | MAC_ENABLE_TX; | |
584 | writel(value, ioaddr + XGMAC_CONTROL); | |
585 | ||
586 | value = readl(ioaddr + XGMAC_DMA_CONTROL); | |
587 | value |= DMA_CONTROL_ST | DMA_CONTROL_SR; | |
588 | writel(value, ioaddr + XGMAC_DMA_CONTROL); | |
589 | } | |
590 | ||
591 | static inline void xgmac_mac_disable(void __iomem *ioaddr) | |
592 | { | |
593 | u32 value = readl(ioaddr + XGMAC_DMA_CONTROL); | |
594 | value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR); | |
595 | writel(value, ioaddr + XGMAC_DMA_CONTROL); | |
596 | ||
597 | value = readl(ioaddr + XGMAC_CONTROL); | |
598 | value &= ~(MAC_ENABLE_TX | MAC_ENABLE_RX); | |
599 | writel(value, ioaddr + XGMAC_CONTROL); | |
600 | } | |
601 | ||
602 | static void xgmac_set_mac_addr(void __iomem *ioaddr, unsigned char *addr, | |
603 | int num) | |
604 | { | |
605 | u32 data; | |
606 | ||
607 | data = (addr[5] << 8) | addr[4] | (num ? XGMAC_ADDR_AE : 0); | |
608 | writel(data, ioaddr + XGMAC_ADDR_HIGH(num)); | |
609 | data = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0]; | |
610 | writel(data, ioaddr + XGMAC_ADDR_LOW(num)); | |
611 | } | |
612 | ||
613 | static void xgmac_get_mac_addr(void __iomem *ioaddr, unsigned char *addr, | |
614 | int num) | |
615 | { | |
616 | u32 hi_addr, lo_addr; | |
617 | ||
618 | /* Read the MAC address from the hardware */ | |
619 | hi_addr = readl(ioaddr + XGMAC_ADDR_HIGH(num)); | |
620 | lo_addr = readl(ioaddr + XGMAC_ADDR_LOW(num)); | |
621 | ||
622 | /* Extract the MAC address from the high and low words */ | |
623 | addr[0] = lo_addr & 0xff; | |
624 | addr[1] = (lo_addr >> 8) & 0xff; | |
625 | addr[2] = (lo_addr >> 16) & 0xff; | |
626 | addr[3] = (lo_addr >> 24) & 0xff; | |
627 | addr[4] = hi_addr & 0xff; | |
628 | addr[5] = (hi_addr >> 8) & 0xff; | |
629 | } | |
630 | ||
631 | static int xgmac_set_flow_ctrl(struct xgmac_priv *priv, int rx, int tx) | |
632 | { | |
633 | u32 reg; | |
634 | unsigned int flow = 0; | |
635 | ||
636 | priv->rx_pause = rx; | |
637 | priv->tx_pause = tx; | |
638 | ||
639 | if (rx || tx) { | |
640 | if (rx) | |
641 | flow |= XGMAC_FLOW_CTRL_RFE; | |
642 | if (tx) | |
643 | flow |= XGMAC_FLOW_CTRL_TFE; | |
644 | ||
645 | flow |= XGMAC_FLOW_CTRL_PLT | XGMAC_FLOW_CTRL_UP; | |
646 | flow |= (PAUSE_TIME << XGMAC_FLOW_CTRL_PT_SHIFT); | |
647 | ||
648 | writel(flow, priv->base + XGMAC_FLOW_CTRL); | |
649 | ||
650 | reg = readl(priv->base + XGMAC_OMR); | |
651 | reg |= XGMAC_OMR_EFC; | |
652 | writel(reg, priv->base + XGMAC_OMR); | |
653 | } else { | |
654 | writel(0, priv->base + XGMAC_FLOW_CTRL); | |
655 | ||
656 | reg = readl(priv->base + XGMAC_OMR); | |
657 | reg &= ~XGMAC_OMR_EFC; | |
658 | writel(reg, priv->base + XGMAC_OMR); | |
659 | } | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static void xgmac_rx_refill(struct xgmac_priv *priv) | |
665 | { | |
666 | struct xgmac_dma_desc *p; | |
667 | dma_addr_t paddr; | |
668 | ||
669 | while (dma_ring_space(priv->rx_head, priv->rx_tail, DMA_RX_RING_SZ) > 1) { | |
670 | int entry = priv->rx_head; | |
671 | struct sk_buff *skb; | |
672 | ||
673 | p = priv->dma_rx + entry; | |
674 | ||
7c400919 | 675 | if (priv->rx_skbuff[entry] == NULL) { |
acb600de | 676 | skb = netdev_alloc_skb(priv->dev, priv->dma_buf_sz); |
7c400919 RH |
677 | if (unlikely(skb == NULL)) |
678 | break; | |
679 | ||
680 | priv->rx_skbuff[entry] = skb; | |
681 | paddr = dma_map_single(priv->device, skb->data, | |
682 | priv->dma_buf_sz, DMA_FROM_DEVICE); | |
683 | desc_set_buf_addr(p, paddr, priv->dma_buf_sz); | |
684 | } | |
85c10f28 RH |
685 | |
686 | netdev_dbg(priv->dev, "rx ring: head %d, tail %d\n", | |
687 | priv->rx_head, priv->rx_tail); | |
688 | ||
689 | priv->rx_head = dma_ring_incr(priv->rx_head, DMA_RX_RING_SZ); | |
85c10f28 RH |
690 | desc_set_rx_owner(p); |
691 | } | |
692 | } | |
693 | ||
694 | /** | |
695 | * init_xgmac_dma_desc_rings - init the RX/TX descriptor rings | |
696 | * @dev: net device structure | |
697 | * Description: this function initializes the DMA RX/TX descriptors | |
698 | * and allocates the socket buffers. | |
699 | */ | |
700 | static int xgmac_dma_desc_rings_init(struct net_device *dev) | |
701 | { | |
702 | struct xgmac_priv *priv = netdev_priv(dev); | |
703 | unsigned int bfsize; | |
704 | ||
705 | /* Set the Buffer size according to the MTU; | |
706 | * indeed, in case of jumbo we need to bump-up the buffer sizes. | |
707 | */ | |
708 | bfsize = ALIGN(dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN + 64, | |
709 | 64); | |
710 | ||
711 | netdev_dbg(priv->dev, "mtu [%d] bfsize [%d]\n", dev->mtu, bfsize); | |
712 | ||
713 | priv->rx_skbuff = kzalloc(sizeof(struct sk_buff *) * DMA_RX_RING_SZ, | |
714 | GFP_KERNEL); | |
715 | if (!priv->rx_skbuff) | |
716 | return -ENOMEM; | |
717 | ||
718 | priv->dma_rx = dma_alloc_coherent(priv->device, | |
719 | DMA_RX_RING_SZ * | |
720 | sizeof(struct xgmac_dma_desc), | |
721 | &priv->dma_rx_phy, | |
722 | GFP_KERNEL); | |
723 | if (!priv->dma_rx) | |
724 | goto err_dma_rx; | |
725 | ||
726 | priv->tx_skbuff = kzalloc(sizeof(struct sk_buff *) * DMA_TX_RING_SZ, | |
727 | GFP_KERNEL); | |
728 | if (!priv->tx_skbuff) | |
729 | goto err_tx_skb; | |
730 | ||
731 | priv->dma_tx = dma_alloc_coherent(priv->device, | |
732 | DMA_TX_RING_SZ * | |
733 | sizeof(struct xgmac_dma_desc), | |
734 | &priv->dma_tx_phy, | |
735 | GFP_KERNEL); | |
736 | if (!priv->dma_tx) | |
737 | goto err_dma_tx; | |
738 | ||
739 | netdev_dbg(priv->dev, "DMA desc rings: virt addr (Rx %p, " | |
740 | "Tx %p)\n\tDMA phy addr (Rx 0x%08x, Tx 0x%08x)\n", | |
741 | priv->dma_rx, priv->dma_tx, | |
742 | (unsigned int)priv->dma_rx_phy, (unsigned int)priv->dma_tx_phy); | |
743 | ||
744 | priv->rx_tail = 0; | |
745 | priv->rx_head = 0; | |
746 | priv->dma_buf_sz = bfsize; | |
747 | desc_init_rx_desc(priv->dma_rx, DMA_RX_RING_SZ, priv->dma_buf_sz); | |
748 | xgmac_rx_refill(priv); | |
749 | ||
750 | priv->tx_tail = 0; | |
751 | priv->tx_head = 0; | |
752 | desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ); | |
753 | ||
754 | writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR); | |
755 | writel(priv->dma_rx_phy, priv->base + XGMAC_DMA_RX_BASE_ADDR); | |
756 | ||
757 | return 0; | |
758 | ||
759 | err_dma_tx: | |
760 | kfree(priv->tx_skbuff); | |
761 | err_tx_skb: | |
762 | dma_free_coherent(priv->device, | |
763 | DMA_RX_RING_SZ * sizeof(struct xgmac_dma_desc), | |
764 | priv->dma_rx, priv->dma_rx_phy); | |
765 | err_dma_rx: | |
766 | kfree(priv->rx_skbuff); | |
767 | return -ENOMEM; | |
768 | } | |
769 | ||
770 | static void xgmac_free_rx_skbufs(struct xgmac_priv *priv) | |
771 | { | |
772 | int i; | |
773 | struct xgmac_dma_desc *p; | |
774 | ||
775 | if (!priv->rx_skbuff) | |
776 | return; | |
777 | ||
778 | for (i = 0; i < DMA_RX_RING_SZ; i++) { | |
779 | if (priv->rx_skbuff[i] == NULL) | |
780 | continue; | |
781 | ||
782 | p = priv->dma_rx + i; | |
783 | dma_unmap_single(priv->device, desc_get_buf_addr(p), | |
784 | priv->dma_buf_sz, DMA_FROM_DEVICE); | |
785 | dev_kfree_skb_any(priv->rx_skbuff[i]); | |
786 | priv->rx_skbuff[i] = NULL; | |
787 | } | |
788 | } | |
789 | ||
790 | static void xgmac_free_tx_skbufs(struct xgmac_priv *priv) | |
791 | { | |
792 | int i, f; | |
793 | struct xgmac_dma_desc *p; | |
794 | ||
795 | if (!priv->tx_skbuff) | |
796 | return; | |
797 | ||
798 | for (i = 0; i < DMA_TX_RING_SZ; i++) { | |
799 | if (priv->tx_skbuff[i] == NULL) | |
800 | continue; | |
801 | ||
802 | p = priv->dma_tx + i; | |
803 | dma_unmap_single(priv->device, desc_get_buf_addr(p), | |
804 | desc_get_buf_len(p), DMA_TO_DEVICE); | |
805 | ||
806 | for (f = 0; f < skb_shinfo(priv->tx_skbuff[i])->nr_frags; f++) { | |
807 | p = priv->dma_tx + i++; | |
808 | dma_unmap_page(priv->device, desc_get_buf_addr(p), | |
809 | desc_get_buf_len(p), DMA_TO_DEVICE); | |
810 | } | |
811 | ||
812 | dev_kfree_skb_any(priv->tx_skbuff[i]); | |
813 | priv->tx_skbuff[i] = NULL; | |
814 | } | |
815 | } | |
816 | ||
817 | static void xgmac_free_dma_desc_rings(struct xgmac_priv *priv) | |
818 | { | |
819 | /* Release the DMA TX/RX socket buffers */ | |
820 | xgmac_free_rx_skbufs(priv); | |
821 | xgmac_free_tx_skbufs(priv); | |
822 | ||
823 | /* Free the consistent memory allocated for descriptor rings */ | |
824 | if (priv->dma_tx) { | |
825 | dma_free_coherent(priv->device, | |
826 | DMA_TX_RING_SZ * sizeof(struct xgmac_dma_desc), | |
827 | priv->dma_tx, priv->dma_tx_phy); | |
828 | priv->dma_tx = NULL; | |
829 | } | |
830 | if (priv->dma_rx) { | |
831 | dma_free_coherent(priv->device, | |
832 | DMA_RX_RING_SZ * sizeof(struct xgmac_dma_desc), | |
833 | priv->dma_rx, priv->dma_rx_phy); | |
834 | priv->dma_rx = NULL; | |
835 | } | |
836 | kfree(priv->rx_skbuff); | |
837 | priv->rx_skbuff = NULL; | |
838 | kfree(priv->tx_skbuff); | |
839 | priv->tx_skbuff = NULL; | |
840 | } | |
841 | ||
842 | /** | |
843 | * xgmac_tx: | |
844 | * @priv: private driver structure | |
845 | * Description: it reclaims resources after transmission completes. | |
846 | */ | |
847 | static void xgmac_tx_complete(struct xgmac_priv *priv) | |
848 | { | |
849 | int i; | |
85c10f28 RH |
850 | |
851 | while (dma_ring_cnt(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ)) { | |
852 | unsigned int entry = priv->tx_tail; | |
853 | struct sk_buff *skb = priv->tx_skbuff[entry]; | |
854 | struct xgmac_dma_desc *p = priv->dma_tx + entry; | |
855 | ||
856 | /* Check if the descriptor is owned by the DMA. */ | |
857 | if (desc_get_owner(p)) | |
858 | break; | |
859 | ||
860 | /* Verify tx error by looking at the last segment */ | |
861 | if (desc_get_tx_ls(p)) | |
862 | desc_get_tx_status(priv, p); | |
863 | ||
864 | netdev_dbg(priv->dev, "tx ring: curr %d, dirty %d\n", | |
865 | priv->tx_head, priv->tx_tail); | |
866 | ||
867 | dma_unmap_single(priv->device, desc_get_buf_addr(p), | |
868 | desc_get_buf_len(p), DMA_TO_DEVICE); | |
869 | ||
870 | priv->tx_skbuff[entry] = NULL; | |
871 | priv->tx_tail = dma_ring_incr(entry, DMA_TX_RING_SZ); | |
872 | ||
873 | if (!skb) { | |
874 | continue; | |
875 | } | |
876 | ||
877 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
878 | entry = priv->tx_tail = dma_ring_incr(priv->tx_tail, | |
879 | DMA_TX_RING_SZ); | |
880 | p = priv->dma_tx + priv->tx_tail; | |
881 | ||
882 | dma_unmap_page(priv->device, desc_get_buf_addr(p), | |
883 | desc_get_buf_len(p), DMA_TO_DEVICE); | |
884 | } | |
885 | ||
acb600de | 886 | dev_kfree_skb(skb); |
85c10f28 RH |
887 | } |
888 | ||
889 | if (dma_ring_space(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ) > | |
97a3a9a6 | 890 | MAX_SKB_FRAGS) |
85c10f28 RH |
891 | netif_wake_queue(priv->dev); |
892 | } | |
893 | ||
894 | /** | |
895 | * xgmac_tx_err: | |
896 | * @priv: pointer to the private device structure | |
897 | * Description: it cleans the descriptors and restarts the transmission | |
898 | * in case of errors. | |
899 | */ | |
900 | static void xgmac_tx_err(struct xgmac_priv *priv) | |
901 | { | |
902 | u32 reg, value, inten; | |
903 | ||
904 | netif_stop_queue(priv->dev); | |
905 | ||
906 | inten = readl(priv->base + XGMAC_DMA_INTR_ENA); | |
907 | writel(0, priv->base + XGMAC_DMA_INTR_ENA); | |
908 | ||
909 | reg = readl(priv->base + XGMAC_DMA_CONTROL); | |
910 | writel(reg & ~DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL); | |
911 | do { | |
912 | value = readl(priv->base + XGMAC_DMA_STATUS) & 0x700000; | |
913 | } while (value && (value != 0x600000)); | |
914 | ||
915 | xgmac_free_tx_skbufs(priv); | |
916 | desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ); | |
917 | priv->tx_tail = 0; | |
918 | priv->tx_head = 0; | |
eb5e1b29 | 919 | writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR); |
85c10f28 RH |
920 | writel(reg | DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL); |
921 | ||
922 | writel(DMA_STATUS_TU | DMA_STATUS_TPS | DMA_STATUS_NIS | DMA_STATUS_AIS, | |
923 | priv->base + XGMAC_DMA_STATUS); | |
924 | writel(inten, priv->base + XGMAC_DMA_INTR_ENA); | |
925 | ||
926 | netif_wake_queue(priv->dev); | |
927 | } | |
928 | ||
929 | static int xgmac_hw_init(struct net_device *dev) | |
930 | { | |
931 | u32 value, ctrl; | |
932 | int limit; | |
933 | struct xgmac_priv *priv = netdev_priv(dev); | |
934 | void __iomem *ioaddr = priv->base; | |
935 | ||
936 | /* Save the ctrl register value */ | |
937 | ctrl = readl(ioaddr + XGMAC_CONTROL) & XGMAC_CONTROL_SPD_MASK; | |
938 | ||
939 | /* SW reset */ | |
940 | value = DMA_BUS_MODE_SFT_RESET; | |
941 | writel(value, ioaddr + XGMAC_DMA_BUS_MODE); | |
942 | limit = 15000; | |
943 | while (limit-- && | |
944 | (readl(ioaddr + XGMAC_DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET)) | |
945 | cpu_relax(); | |
946 | if (limit < 0) | |
947 | return -EBUSY; | |
948 | ||
949 | value = (0x10 << DMA_BUS_MODE_PBL_SHIFT) | | |
950 | (0x10 << DMA_BUS_MODE_RPBL_SHIFT) | | |
951 | DMA_BUS_MODE_FB | DMA_BUS_MODE_ATDS | DMA_BUS_MODE_AAL; | |
952 | writel(value, ioaddr + XGMAC_DMA_BUS_MODE); | |
953 | ||
954 | /* Enable interrupts */ | |
955 | writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS); | |
956 | writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA); | |
957 | ||
958 | /* XGMAC requires AXI bus init. This is a 'magic number' for now */ | |
e36ce6eb | 959 | writel(0x0077000E, ioaddr + XGMAC_DMA_AXI_BUS); |
85c10f28 RH |
960 | |
961 | ctrl |= XGMAC_CONTROL_DDIC | XGMAC_CONTROL_JE | XGMAC_CONTROL_ACS | | |
962 | XGMAC_CONTROL_CAR; | |
963 | if (dev->features & NETIF_F_RXCSUM) | |
964 | ctrl |= XGMAC_CONTROL_IPC; | |
965 | writel(ctrl, ioaddr + XGMAC_CONTROL); | |
966 | ||
b821bd8e | 967 | writel(DMA_CONTROL_OSF, ioaddr + XGMAC_DMA_CONTROL); |
85c10f28 RH |
968 | |
969 | /* Set the HW DMA mode and the COE */ | |
f62a23a7 RH |
970 | writel(XGMAC_OMR_TSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA | |
971 | XGMAC_OMR_RTC_256, | |
85c10f28 RH |
972 | ioaddr + XGMAC_OMR); |
973 | ||
974 | /* Reset the MMC counters */ | |
975 | writel(1, ioaddr + XGMAC_MMC_CTRL); | |
976 | return 0; | |
977 | } | |
978 | ||
979 | /** | |
980 | * xgmac_open - open entry point of the driver | |
981 | * @dev : pointer to the device structure. | |
982 | * Description: | |
983 | * This function is the open entry point of the driver. | |
984 | * Return value: | |
985 | * 0 on success and an appropriate (-)ve integer as defined in errno.h | |
986 | * file on failure. | |
987 | */ | |
988 | static int xgmac_open(struct net_device *dev) | |
989 | { | |
990 | int ret; | |
991 | struct xgmac_priv *priv = netdev_priv(dev); | |
992 | void __iomem *ioaddr = priv->base; | |
993 | ||
994 | /* Check that the MAC address is valid. If its not, refuse | |
995 | * to bring the device up. The user must specify an | |
996 | * address using the following linux command: | |
997 | * ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx */ | |
998 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
7ce5d222 | 999 | eth_hw_addr_random(dev); |
85c10f28 RH |
1000 | netdev_dbg(priv->dev, "generated random MAC address %pM\n", |
1001 | dev->dev_addr); | |
1002 | } | |
1003 | ||
85c10f28 RH |
1004 | memset(&priv->xstats, 0, sizeof(struct xgmac_extra_stats)); |
1005 | ||
1006 | /* Initialize the XGMAC and descriptors */ | |
1007 | xgmac_hw_init(dev); | |
1008 | xgmac_set_mac_addr(ioaddr, dev->dev_addr, 0); | |
1009 | xgmac_set_flow_ctrl(priv, priv->rx_pause, priv->tx_pause); | |
1010 | ||
1011 | ret = xgmac_dma_desc_rings_init(dev); | |
1012 | if (ret < 0) | |
1013 | return ret; | |
1014 | ||
1015 | /* Enable the MAC Rx/Tx */ | |
1016 | xgmac_mac_enable(ioaddr); | |
1017 | ||
1018 | napi_enable(&priv->napi); | |
1019 | netif_start_queue(dev); | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | /** | |
1025 | * xgmac_release - close entry point of the driver | |
1026 | * @dev : device pointer. | |
1027 | * Description: | |
1028 | * This is the stop entry point of the driver. | |
1029 | */ | |
1030 | static int xgmac_stop(struct net_device *dev) | |
1031 | { | |
1032 | struct xgmac_priv *priv = netdev_priv(dev); | |
1033 | ||
1034 | netif_stop_queue(dev); | |
1035 | ||
1036 | if (readl(priv->base + XGMAC_DMA_INTR_ENA)) | |
1037 | napi_disable(&priv->napi); | |
1038 | ||
1039 | writel(0, priv->base + XGMAC_DMA_INTR_ENA); | |
85c10f28 RH |
1040 | |
1041 | /* Disable the MAC core */ | |
1042 | xgmac_mac_disable(priv->base); | |
1043 | ||
1044 | /* Release and free the Rx/Tx resources */ | |
1045 | xgmac_free_dma_desc_rings(priv); | |
1046 | ||
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | /** | |
1051 | * xgmac_xmit: | |
1052 | * @skb : the socket buffer | |
1053 | * @dev : device pointer | |
1054 | * Description : Tx entry point of the driver. | |
1055 | */ | |
1056 | static netdev_tx_t xgmac_xmit(struct sk_buff *skb, struct net_device *dev) | |
1057 | { | |
1058 | struct xgmac_priv *priv = netdev_priv(dev); | |
1059 | unsigned int entry; | |
1060 | int i; | |
97a3a9a6 | 1061 | u32 irq_flag; |
85c10f28 RH |
1062 | int nfrags = skb_shinfo(skb)->nr_frags; |
1063 | struct xgmac_dma_desc *desc, *first; | |
1064 | unsigned int desc_flags; | |
1065 | unsigned int len; | |
1066 | dma_addr_t paddr; | |
1067 | ||
97a3a9a6 RH |
1068 | priv->tx_irq_cnt = (priv->tx_irq_cnt + 1) & (DMA_TX_RING_SZ/4 - 1); |
1069 | irq_flag = priv->tx_irq_cnt ? 0 : TXDESC_INTERRUPT; | |
85c10f28 RH |
1070 | |
1071 | desc_flags = (skb->ip_summed == CHECKSUM_PARTIAL) ? | |
1072 | TXDESC_CSUM_ALL : 0; | |
1073 | entry = priv->tx_head; | |
1074 | desc = priv->dma_tx + entry; | |
1075 | first = desc; | |
1076 | ||
1077 | len = skb_headlen(skb); | |
1078 | paddr = dma_map_single(priv->device, skb->data, len, DMA_TO_DEVICE); | |
1079 | if (dma_mapping_error(priv->device, paddr)) { | |
1080 | dev_kfree_skb(skb); | |
1081 | return -EIO; | |
1082 | } | |
1083 | priv->tx_skbuff[entry] = skb; | |
1084 | desc_set_buf_addr_and_size(desc, paddr, len); | |
1085 | ||
1086 | for (i = 0; i < nfrags; i++) { | |
1087 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1088 | ||
1089 | len = frag->size; | |
1090 | ||
1091 | paddr = skb_frag_dma_map(priv->device, frag, 0, len, | |
1092 | DMA_TO_DEVICE); | |
1093 | if (dma_mapping_error(priv->device, paddr)) { | |
1094 | dev_kfree_skb(skb); | |
1095 | return -EIO; | |
1096 | } | |
1097 | ||
1098 | entry = dma_ring_incr(entry, DMA_TX_RING_SZ); | |
1099 | desc = priv->dma_tx + entry; | |
1100 | priv->tx_skbuff[entry] = NULL; | |
1101 | ||
1102 | desc_set_buf_addr_and_size(desc, paddr, len); | |
1103 | if (i < (nfrags - 1)) | |
1104 | desc_set_tx_owner(desc, desc_flags); | |
1105 | } | |
1106 | ||
1107 | /* Interrupt on completition only for the latest segment */ | |
1108 | if (desc != first) | |
1109 | desc_set_tx_owner(desc, desc_flags | | |
97a3a9a6 | 1110 | TXDESC_LAST_SEG | irq_flag); |
85c10f28 | 1111 | else |
97a3a9a6 | 1112 | desc_flags |= TXDESC_LAST_SEG | irq_flag; |
85c10f28 RH |
1113 | |
1114 | /* Set owner on first desc last to avoid race condition */ | |
1115 | wmb(); | |
1116 | desc_set_tx_owner(first, desc_flags | TXDESC_FIRST_SEG); | |
1117 | ||
1118 | priv->tx_head = dma_ring_incr(entry, DMA_TX_RING_SZ); | |
1119 | ||
1120 | writel(1, priv->base + XGMAC_DMA_TX_POLL); | |
97a3a9a6 RH |
1121 | if (dma_ring_space(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ) < |
1122 | MAX_SKB_FRAGS) | |
1123 | netif_stop_queue(dev); | |
85c10f28 RH |
1124 | |
1125 | return NETDEV_TX_OK; | |
1126 | } | |
1127 | ||
1128 | static int xgmac_rx(struct xgmac_priv *priv, int limit) | |
1129 | { | |
1130 | unsigned int entry; | |
1131 | unsigned int count = 0; | |
1132 | struct xgmac_dma_desc *p; | |
1133 | ||
1134 | while (count < limit) { | |
1135 | int ip_checksum; | |
1136 | struct sk_buff *skb; | |
1137 | int frame_len; | |
1138 | ||
85c10f28 RH |
1139 | entry = priv->rx_tail; |
1140 | p = priv->dma_rx + entry; | |
1141 | if (desc_get_owner(p)) | |
1142 | break; | |
1143 | ||
1144 | count++; | |
1145 | priv->rx_tail = dma_ring_incr(priv->rx_tail, DMA_RX_RING_SZ); | |
1146 | ||
1147 | /* read the status of the incoming frame */ | |
1148 | ip_checksum = desc_get_rx_status(priv, p); | |
1149 | if (ip_checksum < 0) | |
1150 | continue; | |
1151 | ||
1152 | skb = priv->rx_skbuff[entry]; | |
1153 | if (unlikely(!skb)) { | |
1154 | netdev_err(priv->dev, "Inconsistent Rx descriptor chain\n"); | |
1155 | break; | |
1156 | } | |
1157 | priv->rx_skbuff[entry] = NULL; | |
1158 | ||
1159 | frame_len = desc_get_rx_frame_len(p); | |
1160 | netdev_dbg(priv->dev, "RX frame size %d, COE status: %d\n", | |
1161 | frame_len, ip_checksum); | |
1162 | ||
1163 | skb_put(skb, frame_len); | |
1164 | dma_unmap_single(priv->device, desc_get_buf_addr(p), | |
1165 | frame_len, DMA_FROM_DEVICE); | |
1166 | ||
1167 | skb->protocol = eth_type_trans(skb, priv->dev); | |
1168 | skb->ip_summed = ip_checksum; | |
1169 | if (ip_checksum == CHECKSUM_NONE) | |
1170 | netif_receive_skb(skb); | |
1171 | else | |
1172 | napi_gro_receive(&priv->napi, skb); | |
1173 | } | |
1174 | ||
1175 | xgmac_rx_refill(priv); | |
1176 | ||
85c10f28 RH |
1177 | return count; |
1178 | } | |
1179 | ||
1180 | /** | |
1181 | * xgmac_poll - xgmac poll method (NAPI) | |
1182 | * @napi : pointer to the napi structure. | |
1183 | * @budget : maximum number of packets that the current CPU can receive from | |
1184 | * all interfaces. | |
1185 | * Description : | |
1186 | * This function implements the the reception process. | |
1187 | * Also it runs the TX completion thread | |
1188 | */ | |
1189 | static int xgmac_poll(struct napi_struct *napi, int budget) | |
1190 | { | |
1191 | struct xgmac_priv *priv = container_of(napi, | |
1192 | struct xgmac_priv, napi); | |
1193 | int work_done = 0; | |
1194 | ||
1195 | xgmac_tx_complete(priv); | |
1196 | work_done = xgmac_rx(priv, budget); | |
1197 | ||
1198 | if (work_done < budget) { | |
1199 | napi_complete(napi); | |
0ec6d343 | 1200 | __raw_writel(DMA_INTR_DEFAULT_MASK, priv->base + XGMAC_DMA_INTR_ENA); |
85c10f28 RH |
1201 | } |
1202 | return work_done; | |
1203 | } | |
1204 | ||
1205 | /** | |
1206 | * xgmac_tx_timeout | |
1207 | * @dev : Pointer to net device structure | |
1208 | * Description: this function is called when a packet transmission fails to | |
1209 | * complete within a reasonable tmrate. The driver will mark the error in the | |
1210 | * netdev structure and arrange for the device to be reset to a sane state | |
1211 | * in order to transmit a new packet. | |
1212 | */ | |
1213 | static void xgmac_tx_timeout(struct net_device *dev) | |
1214 | { | |
1215 | struct xgmac_priv *priv = netdev_priv(dev); | |
1216 | ||
1217 | /* Clear Tx resources and restart transmitting again */ | |
1218 | xgmac_tx_err(priv); | |
1219 | } | |
1220 | ||
1221 | /** | |
1222 | * xgmac_set_rx_mode - entry point for multicast addressing | |
1223 | * @dev : pointer to the device structure | |
1224 | * Description: | |
1225 | * This function is a driver entry point which gets called by the kernel | |
1226 | * whenever multicast addresses must be enabled/disabled. | |
1227 | * Return value: | |
1228 | * void. | |
1229 | */ | |
1230 | static void xgmac_set_rx_mode(struct net_device *dev) | |
1231 | { | |
1232 | int i; | |
1233 | struct xgmac_priv *priv = netdev_priv(dev); | |
1234 | void __iomem *ioaddr = priv->base; | |
1235 | unsigned int value = 0; | |
1236 | u32 hash_filter[XGMAC_NUM_HASH]; | |
1237 | int reg = 1; | |
1238 | struct netdev_hw_addr *ha; | |
1239 | bool use_hash = false; | |
1240 | ||
1241 | netdev_dbg(priv->dev, "# mcasts %d, # unicast %d\n", | |
1242 | netdev_mc_count(dev), netdev_uc_count(dev)); | |
1243 | ||
1244 | if (dev->flags & IFF_PROMISC) { | |
1245 | writel(XGMAC_FRAME_FILTER_PR, ioaddr + XGMAC_FRAME_FILTER); | |
1246 | return; | |
1247 | } | |
1248 | ||
1249 | memset(hash_filter, 0, sizeof(hash_filter)); | |
1250 | ||
1251 | if (netdev_uc_count(dev) > XGMAC_MAX_FILTER_ADDR) { | |
1252 | use_hash = true; | |
1253 | value |= XGMAC_FRAME_FILTER_HUC | XGMAC_FRAME_FILTER_HPF; | |
1254 | } | |
1255 | netdev_for_each_uc_addr(ha, dev) { | |
1256 | if (use_hash) { | |
1257 | u32 bit_nr = ~ether_crc(ETH_ALEN, ha->addr) >> 23; | |
1258 | ||
1259 | /* The most significant 4 bits determine the register to | |
1260 | * use (H/L) while the other 5 bits determine the bit | |
1261 | * within the register. */ | |
1262 | hash_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); | |
1263 | } else { | |
1264 | xgmac_set_mac_addr(ioaddr, ha->addr, reg); | |
1265 | reg++; | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | if (dev->flags & IFF_ALLMULTI) { | |
1270 | value |= XGMAC_FRAME_FILTER_PM; | |
1271 | goto out; | |
1272 | } | |
1273 | ||
1274 | if ((netdev_mc_count(dev) + reg - 1) > XGMAC_MAX_FILTER_ADDR) { | |
1275 | use_hash = true; | |
1276 | value |= XGMAC_FRAME_FILTER_HMC | XGMAC_FRAME_FILTER_HPF; | |
1277 | } | |
1278 | netdev_for_each_mc_addr(ha, dev) { | |
1279 | if (use_hash) { | |
1280 | u32 bit_nr = ~ether_crc(ETH_ALEN, ha->addr) >> 23; | |
1281 | ||
1282 | /* The most significant 4 bits determine the register to | |
1283 | * use (H/L) while the other 5 bits determine the bit | |
1284 | * within the register. */ | |
1285 | hash_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); | |
1286 | } else { | |
1287 | xgmac_set_mac_addr(ioaddr, ha->addr, reg); | |
1288 | reg++; | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | out: | |
1293 | for (i = 0; i < XGMAC_NUM_HASH; i++) | |
1294 | writel(hash_filter[i], ioaddr + XGMAC_HASH(i)); | |
1295 | ||
1296 | writel(value, ioaddr + XGMAC_FRAME_FILTER); | |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * xgmac_change_mtu - entry point to change MTU size for the device. | |
1301 | * @dev : device pointer. | |
1302 | * @new_mtu : the new MTU size for the device. | |
1303 | * Description: the Maximum Transfer Unit (MTU) is used by the network layer | |
1304 | * to drive packet transmission. Ethernet has an MTU of 1500 octets | |
1305 | * (ETH_DATA_LEN). This value can be changed with ifconfig. | |
1306 | * Return value: | |
1307 | * 0 on success and an appropriate (-)ve integer as defined in errno.h | |
1308 | * file on failure. | |
1309 | */ | |
1310 | static int xgmac_change_mtu(struct net_device *dev, int new_mtu) | |
1311 | { | |
1312 | struct xgmac_priv *priv = netdev_priv(dev); | |
1313 | int old_mtu; | |
1314 | ||
1315 | if ((new_mtu < 46) || (new_mtu > MAX_MTU)) { | |
1316 | netdev_err(priv->dev, "invalid MTU, max MTU is: %d\n", MAX_MTU); | |
1317 | return -EINVAL; | |
1318 | } | |
1319 | ||
1320 | old_mtu = dev->mtu; | |
1321 | dev->mtu = new_mtu; | |
1322 | ||
1323 | /* return early if the buffer sizes will not change */ | |
1324 | if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN) | |
1325 | return 0; | |
1326 | if (old_mtu == new_mtu) | |
1327 | return 0; | |
1328 | ||
1329 | /* Stop everything, get ready to change the MTU */ | |
1330 | if (!netif_running(dev)) | |
1331 | return 0; | |
1332 | ||
1333 | /* Bring the interface down and then back up */ | |
1334 | xgmac_stop(dev); | |
1335 | return xgmac_open(dev); | |
1336 | } | |
1337 | ||
1338 | static irqreturn_t xgmac_pmt_interrupt(int irq, void *dev_id) | |
1339 | { | |
1340 | u32 intr_status; | |
1341 | struct net_device *dev = (struct net_device *)dev_id; | |
1342 | struct xgmac_priv *priv = netdev_priv(dev); | |
1343 | void __iomem *ioaddr = priv->base; | |
1344 | ||
0ec6d343 | 1345 | intr_status = __raw_readl(ioaddr + XGMAC_INT_STAT); |
85c10f28 RH |
1346 | if (intr_status & XGMAC_INT_STAT_PMT) { |
1347 | netdev_dbg(priv->dev, "received Magic frame\n"); | |
1348 | /* clear the PMT bits 5 and 6 by reading the PMT */ | |
1349 | readl(ioaddr + XGMAC_PMT); | |
1350 | } | |
1351 | return IRQ_HANDLED; | |
1352 | } | |
1353 | ||
1354 | static irqreturn_t xgmac_interrupt(int irq, void *dev_id) | |
1355 | { | |
1356 | u32 intr_status; | |
1357 | bool tx_err = false; | |
1358 | struct net_device *dev = (struct net_device *)dev_id; | |
1359 | struct xgmac_priv *priv = netdev_priv(dev); | |
1360 | struct xgmac_extra_stats *x = &priv->xstats; | |
1361 | ||
1362 | /* read the status register (CSR5) */ | |
0ec6d343 RH |
1363 | intr_status = __raw_readl(priv->base + XGMAC_DMA_STATUS); |
1364 | intr_status &= __raw_readl(priv->base + XGMAC_DMA_INTR_ENA); | |
1365 | __raw_writel(intr_status, priv->base + XGMAC_DMA_STATUS); | |
85c10f28 RH |
1366 | |
1367 | /* It displays the DMA process states (CSR5 register) */ | |
1368 | /* ABNORMAL interrupts */ | |
1369 | if (unlikely(intr_status & DMA_STATUS_AIS)) { | |
1370 | if (intr_status & DMA_STATUS_TJT) { | |
1371 | netdev_err(priv->dev, "transmit jabber\n"); | |
1372 | x->tx_jabber++; | |
1373 | } | |
1374 | if (intr_status & DMA_STATUS_RU) | |
1375 | x->rx_buf_unav++; | |
1376 | if (intr_status & DMA_STATUS_RPS) { | |
1377 | netdev_err(priv->dev, "receive process stopped\n"); | |
1378 | x->rx_process_stopped++; | |
1379 | } | |
1380 | if (intr_status & DMA_STATUS_ETI) { | |
1381 | netdev_err(priv->dev, "transmit early interrupt\n"); | |
1382 | x->tx_early++; | |
1383 | } | |
1384 | if (intr_status & DMA_STATUS_TPS) { | |
1385 | netdev_err(priv->dev, "transmit process stopped\n"); | |
1386 | x->tx_process_stopped++; | |
1387 | tx_err = true; | |
1388 | } | |
1389 | if (intr_status & DMA_STATUS_FBI) { | |
1390 | netdev_err(priv->dev, "fatal bus error\n"); | |
1391 | x->fatal_bus_error++; | |
1392 | tx_err = true; | |
1393 | } | |
1394 | ||
1395 | if (tx_err) | |
1396 | xgmac_tx_err(priv); | |
1397 | } | |
1398 | ||
1399 | /* TX/RX NORMAL interrupts */ | |
97a3a9a6 | 1400 | if (intr_status & (DMA_STATUS_RI | DMA_STATUS_TU | DMA_STATUS_TI)) { |
0ec6d343 | 1401 | __raw_writel(DMA_INTR_ABNORMAL, priv->base + XGMAC_DMA_INTR_ENA); |
85c10f28 RH |
1402 | napi_schedule(&priv->napi); |
1403 | } | |
1404 | ||
1405 | return IRQ_HANDLED; | |
1406 | } | |
1407 | ||
1408 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1409 | /* Polling receive - used by NETCONSOLE and other diagnostic tools | |
1410 | * to allow network I/O with interrupts disabled. */ | |
1411 | static void xgmac_poll_controller(struct net_device *dev) | |
1412 | { | |
1413 | disable_irq(dev->irq); | |
1414 | xgmac_interrupt(dev->irq, dev); | |
1415 | enable_irq(dev->irq); | |
1416 | } | |
1417 | #endif | |
1418 | ||
bd601cc4 | 1419 | static struct rtnl_link_stats64 * |
85c10f28 RH |
1420 | xgmac_get_stats64(struct net_device *dev, |
1421 | struct rtnl_link_stats64 *storage) | |
1422 | { | |
1423 | struct xgmac_priv *priv = netdev_priv(dev); | |
1424 | void __iomem *base = priv->base; | |
1425 | u32 count; | |
1426 | ||
1427 | spin_lock_bh(&priv->stats_lock); | |
1428 | writel(XGMAC_MMC_CTRL_CNT_FRZ, base + XGMAC_MMC_CTRL); | |
1429 | ||
1430 | storage->rx_bytes = readl(base + XGMAC_MMC_RXOCTET_G_LO); | |
1431 | storage->rx_bytes |= (u64)(readl(base + XGMAC_MMC_RXOCTET_G_HI)) << 32; | |
1432 | ||
1433 | storage->rx_packets = readl(base + XGMAC_MMC_RXFRAME_GB_LO); | |
1434 | storage->multicast = readl(base + XGMAC_MMC_RXMCFRAME_G); | |
1435 | storage->rx_crc_errors = readl(base + XGMAC_MMC_RXCRCERR); | |
1436 | storage->rx_length_errors = readl(base + XGMAC_MMC_RXLENGTHERR); | |
1437 | storage->rx_missed_errors = readl(base + XGMAC_MMC_RXOVERFLOW); | |
1438 | ||
1439 | storage->tx_bytes = readl(base + XGMAC_MMC_TXOCTET_G_LO); | |
1440 | storage->tx_bytes |= (u64)(readl(base + XGMAC_MMC_TXOCTET_G_HI)) << 32; | |
1441 | ||
1442 | count = readl(base + XGMAC_MMC_TXFRAME_GB_LO); | |
1443 | storage->tx_errors = count - readl(base + XGMAC_MMC_TXFRAME_G_LO); | |
1444 | storage->tx_packets = count; | |
1445 | storage->tx_fifo_errors = readl(base + XGMAC_MMC_TXUNDERFLOW); | |
1446 | ||
1447 | writel(0, base + XGMAC_MMC_CTRL); | |
1448 | spin_unlock_bh(&priv->stats_lock); | |
1449 | return storage; | |
1450 | } | |
1451 | ||
1452 | static int xgmac_set_mac_address(struct net_device *dev, void *p) | |
1453 | { | |
1454 | struct xgmac_priv *priv = netdev_priv(dev); | |
1455 | void __iomem *ioaddr = priv->base; | |
1456 | struct sockaddr *addr = p; | |
1457 | ||
1458 | if (!is_valid_ether_addr(addr->sa_data)) | |
1459 | return -EADDRNOTAVAIL; | |
1460 | ||
7ce5d222 | 1461 | dev->addr_assign_type &= ~NET_ADDR_RANDOM; |
85c10f28 RH |
1462 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
1463 | ||
1464 | xgmac_set_mac_addr(ioaddr, dev->dev_addr, 0); | |
1465 | ||
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | static int xgmac_set_features(struct net_device *dev, netdev_features_t features) | |
1470 | { | |
1471 | u32 ctrl; | |
1472 | struct xgmac_priv *priv = netdev_priv(dev); | |
1473 | void __iomem *ioaddr = priv->base; | |
1474 | u32 changed = dev->features ^ features; | |
1475 | ||
1476 | if (!(changed & NETIF_F_RXCSUM)) | |
1477 | return 0; | |
1478 | ||
1479 | ctrl = readl(ioaddr + XGMAC_CONTROL); | |
1480 | if (features & NETIF_F_RXCSUM) | |
1481 | ctrl |= XGMAC_CONTROL_IPC; | |
1482 | else | |
1483 | ctrl &= ~XGMAC_CONTROL_IPC; | |
1484 | writel(ctrl, ioaddr + XGMAC_CONTROL); | |
1485 | ||
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | static const struct net_device_ops xgmac_netdev_ops = { | |
1490 | .ndo_open = xgmac_open, | |
1491 | .ndo_start_xmit = xgmac_xmit, | |
1492 | .ndo_stop = xgmac_stop, | |
1493 | .ndo_change_mtu = xgmac_change_mtu, | |
1494 | .ndo_set_rx_mode = xgmac_set_rx_mode, | |
1495 | .ndo_tx_timeout = xgmac_tx_timeout, | |
1496 | .ndo_get_stats64 = xgmac_get_stats64, | |
1497 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1498 | .ndo_poll_controller = xgmac_poll_controller, | |
1499 | #endif | |
1500 | .ndo_set_mac_address = xgmac_set_mac_address, | |
1501 | .ndo_set_features = xgmac_set_features, | |
1502 | }; | |
1503 | ||
1504 | static int xgmac_ethtool_getsettings(struct net_device *dev, | |
1505 | struct ethtool_cmd *cmd) | |
1506 | { | |
1507 | cmd->autoneg = 0; | |
1508 | cmd->duplex = DUPLEX_FULL; | |
1509 | ethtool_cmd_speed_set(cmd, 10000); | |
1510 | cmd->supported = 0; | |
1511 | cmd->advertising = 0; | |
1512 | cmd->transceiver = XCVR_INTERNAL; | |
1513 | return 0; | |
1514 | } | |
1515 | ||
1516 | static void xgmac_get_pauseparam(struct net_device *netdev, | |
1517 | struct ethtool_pauseparam *pause) | |
1518 | { | |
1519 | struct xgmac_priv *priv = netdev_priv(netdev); | |
1520 | ||
1521 | pause->rx_pause = priv->rx_pause; | |
1522 | pause->tx_pause = priv->tx_pause; | |
1523 | } | |
1524 | ||
1525 | static int xgmac_set_pauseparam(struct net_device *netdev, | |
1526 | struct ethtool_pauseparam *pause) | |
1527 | { | |
1528 | struct xgmac_priv *priv = netdev_priv(netdev); | |
1529 | ||
1530 | if (pause->autoneg) | |
1531 | return -EINVAL; | |
1532 | ||
1533 | return xgmac_set_flow_ctrl(priv, pause->rx_pause, pause->tx_pause); | |
1534 | } | |
1535 | ||
1536 | struct xgmac_stats { | |
1537 | char stat_string[ETH_GSTRING_LEN]; | |
1538 | int stat_offset; | |
1539 | bool is_reg; | |
1540 | }; | |
1541 | ||
1542 | #define XGMAC_STAT(m) \ | |
1543 | { #m, offsetof(struct xgmac_priv, xstats.m), false } | |
1544 | #define XGMAC_HW_STAT(m, reg_offset) \ | |
1545 | { #m, reg_offset, true } | |
1546 | ||
1547 | static const struct xgmac_stats xgmac_gstrings_stats[] = { | |
1548 | XGMAC_STAT(tx_frame_flushed), | |
1549 | XGMAC_STAT(tx_payload_error), | |
1550 | XGMAC_STAT(tx_ip_header_error), | |
1551 | XGMAC_STAT(tx_local_fault), | |
1552 | XGMAC_STAT(tx_remote_fault), | |
1553 | XGMAC_STAT(tx_early), | |
1554 | XGMAC_STAT(tx_process_stopped), | |
1555 | XGMAC_STAT(tx_jabber), | |
1556 | XGMAC_STAT(rx_buf_unav), | |
1557 | XGMAC_STAT(rx_process_stopped), | |
1558 | XGMAC_STAT(rx_payload_error), | |
1559 | XGMAC_STAT(rx_ip_header_error), | |
1560 | XGMAC_STAT(rx_da_filter_fail), | |
1561 | XGMAC_STAT(rx_sa_filter_fail), | |
1562 | XGMAC_STAT(fatal_bus_error), | |
1563 | XGMAC_HW_STAT(rx_watchdog, XGMAC_MMC_RXWATCHDOG), | |
1564 | XGMAC_HW_STAT(tx_vlan, XGMAC_MMC_TXVLANFRAME), | |
1565 | XGMAC_HW_STAT(rx_vlan, XGMAC_MMC_RXVLANFRAME), | |
1566 | XGMAC_HW_STAT(tx_pause, XGMAC_MMC_TXPAUSEFRAME), | |
1567 | XGMAC_HW_STAT(rx_pause, XGMAC_MMC_RXPAUSEFRAME), | |
1568 | }; | |
1569 | #define XGMAC_STATS_LEN ARRAY_SIZE(xgmac_gstrings_stats) | |
1570 | ||
1571 | static void xgmac_get_ethtool_stats(struct net_device *dev, | |
1572 | struct ethtool_stats *dummy, | |
1573 | u64 *data) | |
1574 | { | |
1575 | struct xgmac_priv *priv = netdev_priv(dev); | |
1576 | void *p = priv; | |
1577 | int i; | |
1578 | ||
1579 | for (i = 0; i < XGMAC_STATS_LEN; i++) { | |
1580 | if (xgmac_gstrings_stats[i].is_reg) | |
1581 | *data++ = readl(priv->base + | |
1582 | xgmac_gstrings_stats[i].stat_offset); | |
1583 | else | |
1584 | *data++ = *(u32 *)(p + | |
1585 | xgmac_gstrings_stats[i].stat_offset); | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | static int xgmac_get_sset_count(struct net_device *netdev, int sset) | |
1590 | { | |
1591 | switch (sset) { | |
1592 | case ETH_SS_STATS: | |
1593 | return XGMAC_STATS_LEN; | |
1594 | default: | |
1595 | return -EINVAL; | |
1596 | } | |
1597 | } | |
1598 | ||
1599 | static void xgmac_get_strings(struct net_device *dev, u32 stringset, | |
1600 | u8 *data) | |
1601 | { | |
1602 | int i; | |
1603 | u8 *p = data; | |
1604 | ||
1605 | switch (stringset) { | |
1606 | case ETH_SS_STATS: | |
1607 | for (i = 0; i < XGMAC_STATS_LEN; i++) { | |
1608 | memcpy(p, xgmac_gstrings_stats[i].stat_string, | |
1609 | ETH_GSTRING_LEN); | |
1610 | p += ETH_GSTRING_LEN; | |
1611 | } | |
1612 | break; | |
1613 | default: | |
1614 | WARN_ON(1); | |
1615 | break; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | static void xgmac_get_wol(struct net_device *dev, | |
1620 | struct ethtool_wolinfo *wol) | |
1621 | { | |
1622 | struct xgmac_priv *priv = netdev_priv(dev); | |
1623 | ||
1624 | if (device_can_wakeup(priv->device)) { | |
1625 | wol->supported = WAKE_MAGIC | WAKE_UCAST; | |
1626 | wol->wolopts = priv->wolopts; | |
1627 | } | |
1628 | } | |
1629 | ||
1630 | static int xgmac_set_wol(struct net_device *dev, | |
1631 | struct ethtool_wolinfo *wol) | |
1632 | { | |
1633 | struct xgmac_priv *priv = netdev_priv(dev); | |
1634 | u32 support = WAKE_MAGIC | WAKE_UCAST; | |
1635 | ||
1636 | if (!device_can_wakeup(priv->device)) | |
1637 | return -ENOTSUPP; | |
1638 | ||
1639 | if (wol->wolopts & ~support) | |
1640 | return -EINVAL; | |
1641 | ||
1642 | priv->wolopts = wol->wolopts; | |
1643 | ||
1644 | if (wol->wolopts) { | |
1645 | device_set_wakeup_enable(priv->device, 1); | |
1646 | enable_irq_wake(dev->irq); | |
1647 | } else { | |
1648 | device_set_wakeup_enable(priv->device, 0); | |
1649 | disable_irq_wake(dev->irq); | |
1650 | } | |
1651 | ||
1652 | return 0; | |
1653 | } | |
1654 | ||
bd601cc4 | 1655 | static const struct ethtool_ops xgmac_ethtool_ops = { |
85c10f28 RH |
1656 | .get_settings = xgmac_ethtool_getsettings, |
1657 | .get_link = ethtool_op_get_link, | |
1658 | .get_pauseparam = xgmac_get_pauseparam, | |
1659 | .set_pauseparam = xgmac_set_pauseparam, | |
1660 | .get_ethtool_stats = xgmac_get_ethtool_stats, | |
1661 | .get_strings = xgmac_get_strings, | |
1662 | .get_wol = xgmac_get_wol, | |
1663 | .set_wol = xgmac_set_wol, | |
1664 | .get_sset_count = xgmac_get_sset_count, | |
1665 | }; | |
1666 | ||
1667 | /** | |
1668 | * xgmac_probe | |
1669 | * @pdev: platform device pointer | |
1670 | * Description: the driver is initialized through platform_device. | |
1671 | */ | |
1672 | static int xgmac_probe(struct platform_device *pdev) | |
1673 | { | |
1674 | int ret = 0; | |
1675 | struct resource *res; | |
1676 | struct net_device *ndev = NULL; | |
1677 | struct xgmac_priv *priv = NULL; | |
1678 | u32 uid; | |
1679 | ||
1680 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1681 | if (!res) | |
1682 | return -ENODEV; | |
1683 | ||
1684 | if (!request_mem_region(res->start, resource_size(res), pdev->name)) | |
1685 | return -EBUSY; | |
1686 | ||
1687 | ndev = alloc_etherdev(sizeof(struct xgmac_priv)); | |
1688 | if (!ndev) { | |
1689 | ret = -ENOMEM; | |
1690 | goto err_alloc; | |
1691 | } | |
1692 | ||
1693 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1694 | priv = netdev_priv(ndev); | |
1695 | platform_set_drvdata(pdev, ndev); | |
1696 | ether_setup(ndev); | |
1697 | ndev->netdev_ops = &xgmac_netdev_ops; | |
1698 | SET_ETHTOOL_OPS(ndev, &xgmac_ethtool_ops); | |
1699 | spin_lock_init(&priv->stats_lock); | |
1700 | ||
1701 | priv->device = &pdev->dev; | |
1702 | priv->dev = ndev; | |
1703 | priv->rx_pause = 1; | |
1704 | priv->tx_pause = 1; | |
1705 | ||
1706 | priv->base = ioremap(res->start, resource_size(res)); | |
1707 | if (!priv->base) { | |
1708 | netdev_err(ndev, "ioremap failed\n"); | |
1709 | ret = -ENOMEM; | |
1710 | goto err_io; | |
1711 | } | |
1712 | ||
1713 | uid = readl(priv->base + XGMAC_VERSION); | |
1714 | netdev_info(ndev, "h/w version is 0x%x\n", uid); | |
1715 | ||
1716 | writel(0, priv->base + XGMAC_DMA_INTR_ENA); | |
1717 | ndev->irq = platform_get_irq(pdev, 0); | |
1718 | if (ndev->irq == -ENXIO) { | |
1719 | netdev_err(ndev, "No irq resource\n"); | |
1720 | ret = ndev->irq; | |
1721 | goto err_irq; | |
1722 | } | |
1723 | ||
1724 | ret = request_irq(ndev->irq, xgmac_interrupt, 0, | |
1725 | dev_name(&pdev->dev), ndev); | |
1726 | if (ret < 0) { | |
1727 | netdev_err(ndev, "Could not request irq %d - ret %d)\n", | |
1728 | ndev->irq, ret); | |
1729 | goto err_irq; | |
1730 | } | |
1731 | ||
1732 | priv->pmt_irq = platform_get_irq(pdev, 1); | |
1733 | if (priv->pmt_irq == -ENXIO) { | |
1734 | netdev_err(ndev, "No pmt irq resource\n"); | |
1735 | ret = priv->pmt_irq; | |
1736 | goto err_pmt_irq; | |
1737 | } | |
1738 | ||
1739 | ret = request_irq(priv->pmt_irq, xgmac_pmt_interrupt, 0, | |
1740 | dev_name(&pdev->dev), ndev); | |
1741 | if (ret < 0) { | |
1742 | netdev_err(ndev, "Could not request irq %d - ret %d)\n", | |
1743 | priv->pmt_irq, ret); | |
1744 | goto err_pmt_irq; | |
1745 | } | |
1746 | ||
1747 | device_set_wakeup_capable(&pdev->dev, 1); | |
1748 | if (device_can_wakeup(priv->device)) | |
1749 | priv->wolopts = WAKE_MAGIC; /* Magic Frame as default */ | |
1750 | ||
1751 | ndev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA; | |
1752 | if (readl(priv->base + XGMAC_DMA_HW_FEATURE) & DMA_HW_FEAT_TXCOESEL) | |
1753 | ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | | |
1754 | NETIF_F_RXCSUM; | |
1755 | ndev->features |= ndev->hw_features; | |
1756 | ndev->priv_flags |= IFF_UNICAST_FLT; | |
1757 | ||
1758 | /* Get the MAC address */ | |
1759 | xgmac_get_mac_addr(priv->base, ndev->dev_addr, 0); | |
1760 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1761 | netdev_warn(ndev, "MAC address %pM not valid", | |
1762 | ndev->dev_addr); | |
1763 | ||
1764 | netif_napi_add(ndev, &priv->napi, xgmac_poll, 64); | |
1765 | ret = register_netdev(ndev); | |
1766 | if (ret) | |
1767 | goto err_reg; | |
1768 | ||
1769 | return 0; | |
1770 | ||
1771 | err_reg: | |
1772 | netif_napi_del(&priv->napi); | |
1773 | free_irq(priv->pmt_irq, ndev); | |
1774 | err_pmt_irq: | |
1775 | free_irq(ndev->irq, ndev); | |
1776 | err_irq: | |
1777 | iounmap(priv->base); | |
1778 | err_io: | |
1779 | free_netdev(ndev); | |
1780 | err_alloc: | |
1781 | release_mem_region(res->start, resource_size(res)); | |
1782 | platform_set_drvdata(pdev, NULL); | |
1783 | return ret; | |
1784 | } | |
1785 | ||
1786 | /** | |
1787 | * xgmac_dvr_remove | |
1788 | * @pdev: platform device pointer | |
1789 | * Description: this function resets the TX/RX processes, disables the MAC RX/TX | |
1790 | * changes the link status, releases the DMA descriptor rings, | |
1791 | * unregisters the MDIO bus and unmaps the allocated memory. | |
1792 | */ | |
1793 | static int xgmac_remove(struct platform_device *pdev) | |
1794 | { | |
1795 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1796 | struct xgmac_priv *priv = netdev_priv(ndev); | |
1797 | struct resource *res; | |
1798 | ||
1799 | xgmac_mac_disable(priv->base); | |
1800 | ||
1801 | /* Free the IRQ lines */ | |
1802 | free_irq(ndev->irq, ndev); | |
1803 | free_irq(priv->pmt_irq, ndev); | |
1804 | ||
1805 | platform_set_drvdata(pdev, NULL); | |
1806 | unregister_netdev(ndev); | |
1807 | netif_napi_del(&priv->napi); | |
1808 | ||
1809 | iounmap(priv->base); | |
1810 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1811 | release_mem_region(res->start, resource_size(res)); | |
1812 | ||
1813 | free_netdev(ndev); | |
1814 | ||
1815 | return 0; | |
1816 | } | |
1817 | ||
1818 | #ifdef CONFIG_PM_SLEEP | |
1819 | static void xgmac_pmt(void __iomem *ioaddr, unsigned long mode) | |
1820 | { | |
1821 | unsigned int pmt = 0; | |
1822 | ||
1823 | if (mode & WAKE_MAGIC) | |
1824 | pmt |= XGMAC_PMT_POWERDOWN | XGMAC_PMT_MAGIC_PKT; | |
1825 | if (mode & WAKE_UCAST) | |
1826 | pmt |= XGMAC_PMT_POWERDOWN | XGMAC_PMT_GLBL_UNICAST; | |
1827 | ||
1828 | writel(pmt, ioaddr + XGMAC_PMT); | |
1829 | } | |
1830 | ||
1831 | static int xgmac_suspend(struct device *dev) | |
1832 | { | |
1833 | struct net_device *ndev = platform_get_drvdata(to_platform_device(dev)); | |
1834 | struct xgmac_priv *priv = netdev_priv(ndev); | |
1835 | u32 value; | |
1836 | ||
1837 | if (!ndev || !netif_running(ndev)) | |
1838 | return 0; | |
1839 | ||
1840 | netif_device_detach(ndev); | |
1841 | napi_disable(&priv->napi); | |
1842 | writel(0, priv->base + XGMAC_DMA_INTR_ENA); | |
1843 | ||
1844 | if (device_may_wakeup(priv->device)) { | |
1845 | /* Stop TX/RX DMA Only */ | |
1846 | value = readl(priv->base + XGMAC_DMA_CONTROL); | |
1847 | value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR); | |
1848 | writel(value, priv->base + XGMAC_DMA_CONTROL); | |
1849 | ||
1850 | xgmac_pmt(priv->base, priv->wolopts); | |
1851 | } else | |
1852 | xgmac_mac_disable(priv->base); | |
1853 | ||
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | static int xgmac_resume(struct device *dev) | |
1858 | { | |
1859 | struct net_device *ndev = platform_get_drvdata(to_platform_device(dev)); | |
1860 | struct xgmac_priv *priv = netdev_priv(ndev); | |
1861 | void __iomem *ioaddr = priv->base; | |
1862 | ||
1863 | if (!netif_running(ndev)) | |
1864 | return 0; | |
1865 | ||
1866 | xgmac_pmt(ioaddr, 0); | |
1867 | ||
1868 | /* Enable the MAC and DMA */ | |
1869 | xgmac_mac_enable(ioaddr); | |
1870 | writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS); | |
1871 | writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA); | |
1872 | ||
1873 | netif_device_attach(ndev); | |
1874 | napi_enable(&priv->napi); | |
1875 | ||
1876 | return 0; | |
1877 | } | |
1878 | ||
1879 | static SIMPLE_DEV_PM_OPS(xgmac_pm_ops, xgmac_suspend, xgmac_resume); | |
1880 | #define XGMAC_PM_OPS (&xgmac_pm_ops) | |
1881 | #else | |
1882 | #define XGMAC_PM_OPS NULL | |
1883 | #endif /* CONFIG_PM_SLEEP */ | |
1884 | ||
1885 | static const struct of_device_id xgmac_of_match[] = { | |
1886 | { .compatible = "calxeda,hb-xgmac", }, | |
1887 | {}, | |
1888 | }; | |
1889 | MODULE_DEVICE_TABLE(of, xgmac_of_match); | |
1890 | ||
1891 | static struct platform_driver xgmac_driver = { | |
1892 | .driver = { | |
1893 | .name = "calxedaxgmac", | |
1894 | .of_match_table = xgmac_of_match, | |
1895 | }, | |
1896 | .probe = xgmac_probe, | |
1897 | .remove = xgmac_remove, | |
1898 | .driver.pm = XGMAC_PM_OPS, | |
1899 | }; | |
1900 | ||
1901 | module_platform_driver(xgmac_driver); | |
1902 | ||
1903 | MODULE_AUTHOR("Calxeda, Inc."); | |
1904 | MODULE_DESCRIPTION("Calxeda 10G XGMAC driver"); | |
1905 | MODULE_LICENSE("GPL v2"); |