1 #ifndef __MV643XX_ETH_H__
2 #define __MV643XX_ETH_H__
4 #include <linux/module.h>
5 #include <linux/kernel.h>
6 #include <linux/spinlock.h>
7 #include <linux/workqueue.h>
10 #include <linux/mv643xx.h>
12 #include <asm/dma-mapping.h>
14 /* Checksum offload for Tx works for most packets, but
15 * fails if previous packet sent did not use hw csum
17 #define MV643XX_CHECKSUM_OFFLOAD_TX
19 #define MV643XX_TX_FAST_REFILL
23 * Number of RX / TX descriptors on RX / TX rings.
24 * Note that allocating RX descriptors is done by allocating the RX
25 * ring AND a preallocated RX buffers (skb's) for each descriptor.
26 * The TX descriptors only allocates the TX descriptors ring,
27 * with no pre allocated TX buffers (skb's are allocated by higher layers.
30 /* Default TX ring size is 1000 descriptors */
31 #define MV643XX_DEFAULT_TX_QUEUE_SIZE 1000
33 /* Default RX ring size is 400 descriptors */
34 #define MV643XX_DEFAULT_RX_QUEUE_SIZE 400
36 #define MV643XX_TX_COAL 100
38 #define MV643XX_RX_COAL 100
41 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
42 #define MAX_DESCS_PER_SKB (MAX_SKB_FRAGS + 1)
44 #define MAX_DESCS_PER_SKB 1
47 #define ETH_VLAN_HLEN 4
49 #define ETH_HW_IP_ALIGN 2 /* hw aligns IP header */
50 #define ETH_WRAPPER_LEN (ETH_HW_IP_ALIGN + ETH_HLEN + \
51 ETH_VLAN_HLEN + ETH_FCS_LEN)
52 #define ETH_RX_SKB_SIZE (dev->mtu + ETH_WRAPPER_LEN + dma_get_cache_alignment())
54 #define ETH_RX_QUEUES_ENABLED (1 << 0) /* use only Q0 for receive */
55 #define ETH_TX_QUEUES_ENABLED (1 << 0) /* use only Q0 for transmit */
57 #define ETH_INT_CAUSE_RX_DONE (ETH_RX_QUEUES_ENABLED << 2)
58 #define ETH_INT_CAUSE_RX_ERROR (ETH_RX_QUEUES_ENABLED << 9)
59 #define ETH_INT_CAUSE_RX (ETH_INT_CAUSE_RX_DONE | ETH_INT_CAUSE_RX_ERROR)
60 #define ETH_INT_CAUSE_EXT 0x00000002
61 #define ETH_INT_UNMASK_ALL (ETH_INT_CAUSE_RX | ETH_INT_CAUSE_EXT)
63 #define ETH_INT_CAUSE_TX_DONE (ETH_TX_QUEUES_ENABLED << 0)
64 #define ETH_INT_CAUSE_TX_ERROR (ETH_TX_QUEUES_ENABLED << 8)
65 #define ETH_INT_CAUSE_TX (ETH_INT_CAUSE_TX_DONE | ETH_INT_CAUSE_TX_ERROR)
66 #define ETH_INT_CAUSE_PHY 0x00010000
67 #define ETH_INT_CAUSE_STATE 0x00100000
68 #define ETH_INT_UNMASK_ALL_EXT (ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY | \
71 #define ETH_INT_MASK_ALL 0x00000000
72 #define ETH_INT_MASK_ALL_EXT 0x00000000
74 #define PHY_WAIT_ITERATIONS 1000 /* 1000 iterations * 10uS = 10mS max */
75 #define PHY_WAIT_MICRO_SECONDS 10
77 /* Buffer offset from buffer pointer */
78 #define RX_BUF_OFFSET 0x2
80 /* Gigabit Ethernet Unit Global Registers */
82 /* MIB Counters register definitions */
83 #define ETH_MIB_GOOD_OCTETS_RECEIVED_LOW 0x0
84 #define ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH 0x4
85 #define ETH_MIB_BAD_OCTETS_RECEIVED 0x8
86 #define ETH_MIB_INTERNAL_MAC_TRANSMIT_ERR 0xc
87 #define ETH_MIB_GOOD_FRAMES_RECEIVED 0x10
88 #define ETH_MIB_BAD_FRAMES_RECEIVED 0x14
89 #define ETH_MIB_BROADCAST_FRAMES_RECEIVED 0x18
90 #define ETH_MIB_MULTICAST_FRAMES_RECEIVED 0x1c
91 #define ETH_MIB_FRAMES_64_OCTETS 0x20
92 #define ETH_MIB_FRAMES_65_TO_127_OCTETS 0x24
93 #define ETH_MIB_FRAMES_128_TO_255_OCTETS 0x28
94 #define ETH_MIB_FRAMES_256_TO_511_OCTETS 0x2c
95 #define ETH_MIB_FRAMES_512_TO_1023_OCTETS 0x30
96 #define ETH_MIB_FRAMES_1024_TO_MAX_OCTETS 0x34
97 #define ETH_MIB_GOOD_OCTETS_SENT_LOW 0x38
98 #define ETH_MIB_GOOD_OCTETS_SENT_HIGH 0x3c
99 #define ETH_MIB_GOOD_FRAMES_SENT 0x40
100 #define ETH_MIB_EXCESSIVE_COLLISION 0x44
101 #define ETH_MIB_MULTICAST_FRAMES_SENT 0x48
102 #define ETH_MIB_BROADCAST_FRAMES_SENT 0x4c
103 #define ETH_MIB_UNREC_MAC_CONTROL_RECEIVED 0x50
104 #define ETH_MIB_FC_SENT 0x54
105 #define ETH_MIB_GOOD_FC_RECEIVED 0x58
106 #define ETH_MIB_BAD_FC_RECEIVED 0x5c
107 #define ETH_MIB_UNDERSIZE_RECEIVED 0x60
108 #define ETH_MIB_FRAGMENTS_RECEIVED 0x64
109 #define ETH_MIB_OVERSIZE_RECEIVED 0x68
110 #define ETH_MIB_JABBER_RECEIVED 0x6c
111 #define ETH_MIB_MAC_RECEIVE_ERROR 0x70
112 #define ETH_MIB_BAD_CRC_EVENT 0x74
113 #define ETH_MIB_COLLISION 0x78
114 #define ETH_MIB_LATE_COLLISION 0x7c
116 /* Port serial status reg (PSR) */
117 #define ETH_INTERFACE_PCM 0x00000001
118 #define ETH_LINK_IS_UP 0x00000002
119 #define ETH_PORT_AT_FULL_DUPLEX 0x00000004
120 #define ETH_RX_FLOW_CTRL_ENABLED 0x00000008
121 #define ETH_GMII_SPEED_1000 0x00000010
122 #define ETH_MII_SPEED_100 0x00000020
123 #define ETH_TX_IN_PROGRESS 0x00000080
124 #define ETH_BYPASS_ACTIVE 0x00000100
125 #define ETH_PORT_AT_PARTITION_STATE 0x00000200
126 #define ETH_PORT_TX_FIFO_EMPTY 0x00000400
129 #define ETH_SMI_BUSY 0x10000000 /* 0 - Write, 1 - Read */
130 #define ETH_SMI_READ_VALID 0x08000000 /* 0 - Write, 1 - Read */
131 #define ETH_SMI_OPCODE_WRITE 0 /* Completion of Read */
132 #define ETH_SMI_OPCODE_READ 0x04000000 /* Operation is in progress */
134 /* Interrupt Cause Register Bit Definitions */
136 /* SDMA command status fields macros */
138 /* Tx & Rx descriptors status */
139 #define ETH_ERROR_SUMMARY 0x00000001
141 /* Tx & Rx descriptors command */
142 #define ETH_BUFFER_OWNED_BY_DMA 0x80000000
144 /* Tx descriptors status */
145 #define ETH_LC_ERROR 0
146 #define ETH_UR_ERROR 0x00000002
147 #define ETH_RL_ERROR 0x00000004
148 #define ETH_LLC_SNAP_FORMAT 0x00000200
150 /* Rx descriptors status */
151 #define ETH_OVERRUN_ERROR 0x00000002
152 #define ETH_MAX_FRAME_LENGTH_ERROR 0x00000004
153 #define ETH_RESOURCE_ERROR 0x00000006
154 #define ETH_VLAN_TAGGED 0x00080000
155 #define ETH_BPDU_FRAME 0x00100000
156 #define ETH_UDP_FRAME_OVER_IP_V_4 0x00200000
157 #define ETH_OTHER_FRAME_TYPE 0x00400000
158 #define ETH_LAYER_2_IS_ETH_V_2 0x00800000
159 #define ETH_FRAME_TYPE_IP_V_4 0x01000000
160 #define ETH_FRAME_HEADER_OK 0x02000000
161 #define ETH_RX_LAST_DESC 0x04000000
162 #define ETH_RX_FIRST_DESC 0x08000000
163 #define ETH_UNKNOWN_DESTINATION_ADDR 0x10000000
164 #define ETH_RX_ENABLE_INTERRUPT 0x20000000
165 #define ETH_LAYER_4_CHECKSUM_OK 0x40000000
167 /* Rx descriptors byte count */
168 #define ETH_FRAME_FRAGMENTED 0x00000004
170 /* Tx descriptors command */
171 #define ETH_LAYER_4_CHECKSUM_FIRST_DESC 0x00000400
172 #define ETH_FRAME_SET_TO_VLAN 0x00008000
173 #define ETH_UDP_FRAME 0x00010000
174 #define ETH_GEN_TCP_UDP_CHECKSUM 0x00020000
175 #define ETH_GEN_IP_V_4_CHECKSUM 0x00040000
176 #define ETH_ZERO_PADDING 0x00080000
177 #define ETH_TX_LAST_DESC 0x00100000
178 #define ETH_TX_FIRST_DESC 0x00200000
179 #define ETH_GEN_CRC 0x00400000
180 #define ETH_TX_ENABLE_INTERRUPT 0x00800000
181 #define ETH_AUTO_MODE 0x40000000
183 #define ETH_TX_IHL_SHIFT 11
187 typedef enum _eth_func_ret_status {
188 ETH_OK, /* Returned as expected. */
189 ETH_ERROR, /* Fundamental error. */
190 ETH_RETRY, /* Could not process request. Try later.*/
191 ETH_END_OF_JOB, /* Ring has nothing to process. */
192 ETH_QUEUE_FULL, /* Ring resource error. */
193 ETH_QUEUE_LAST_RESOURCE /* Ring resources about to exhaust. */
194 } ETH_FUNC_RET_STATUS;
196 typedef enum _eth_target {
204 /* These are for big-endian machines. Little endian needs different
207 #if defined(__BIG_ENDIAN)
209 u16 byte_cnt; /* Descriptor buffer byte count */
210 u16 buf_size; /* Buffer size */
211 u32 cmd_sts; /* Descriptor command status */
212 u32 next_desc_ptr; /* Next descriptor pointer */
213 u32 buf_ptr; /* Descriptor buffer pointer */
217 u16 byte_cnt; /* buffer byte count */
218 u16 l4i_chk; /* CPU provided TCP checksum */
219 u32 cmd_sts; /* Command/status field */
220 u32 next_desc_ptr; /* Pointer to next descriptor */
221 u32 buf_ptr; /* pointer to buffer for this descriptor*/
224 #elif defined(__LITTLE_ENDIAN)
226 u32 cmd_sts; /* Descriptor command status */
227 u16 buf_size; /* Buffer size */
228 u16 byte_cnt; /* Descriptor buffer byte count */
229 u32 buf_ptr; /* Descriptor buffer pointer */
230 u32 next_desc_ptr; /* Next descriptor pointer */
234 u32 cmd_sts; /* Command/status field */
235 u16 l4i_chk; /* CPU provided TCP checksum */
236 u16 byte_cnt; /* buffer byte count */
237 u32 buf_ptr; /* pointer to buffer for this descriptor*/
238 u32 next_desc_ptr; /* Pointer to next descriptor */
241 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
244 /* Unified struct for Rx and Tx operations. The user is not required to */
245 /* be familier with neither Tx nor Rx descriptors. */
247 unsigned short byte_cnt; /* Descriptor buffer byte count */
248 unsigned short l4i_chk; /* Tx CPU provided TCP Checksum */
249 unsigned int cmd_sts; /* Descriptor command status */
250 dma_addr_t buf_ptr; /* Descriptor buffer pointer */
251 struct sk_buff *return_info; /* User resource return information */
254 /* Ethernet port specific information */
256 struct mv643xx_mib_counters {
257 u64 good_octets_received;
258 u32 bad_octets_received;
259 u32 internal_mac_transmit_err;
260 u32 good_frames_received;
261 u32 bad_frames_received;
262 u32 broadcast_frames_received;
263 u32 multicast_frames_received;
264 u32 frames_64_octets;
265 u32 frames_65_to_127_octets;
266 u32 frames_128_to_255_octets;
267 u32 frames_256_to_511_octets;
268 u32 frames_512_to_1023_octets;
269 u32 frames_1024_to_max_octets;
270 u64 good_octets_sent;
271 u32 good_frames_sent;
272 u32 excessive_collision;
273 u32 multicast_frames_sent;
274 u32 broadcast_frames_sent;
275 u32 unrec_mac_control_received;
277 u32 good_fc_received;
279 u32 undersize_received;
280 u32 fragments_received;
281 u32 oversize_received;
283 u32 mac_receive_error;
289 struct mv643xx_private {
290 int port_num; /* User Ethernet port number */
292 u32 rx_sram_addr; /* Base address of rx sram area */
293 u32 rx_sram_size; /* Size of rx sram area */
294 u32 tx_sram_addr; /* Base address of tx sram area */
295 u32 tx_sram_size; /* Size of tx sram area */
297 int rx_resource_err; /* Rx ring resource error flag */
299 /* Tx/Rx rings managment indexes fields. For driver use */
301 /* Next available and first returning Rx resource */
302 int rx_curr_desc_q, rx_used_desc_q;
304 /* Next available and first returning Tx resource */
305 int tx_curr_desc_q, tx_used_desc_q;
307 #ifdef MV643XX_TX_FAST_REFILL
308 u32 tx_clean_threshold;
311 struct eth_rx_desc *p_rx_desc_area;
312 dma_addr_t rx_desc_dma;
313 int rx_desc_area_size;
314 struct sk_buff **rx_skb;
316 struct eth_tx_desc *p_tx_desc_area;
317 dma_addr_t tx_desc_dma;
318 int tx_desc_area_size;
319 struct sk_buff **tx_skb;
321 struct work_struct tx_timeout_task;
323 struct net_device *dev;
324 struct napi_struct napi;
325 struct net_device_stats stats;
326 struct mv643xx_mib_counters mib_counters;
328 /* Size of Tx Ring per queue */
330 /* Number of tx descriptors in use */
332 /* Size of Rx Ring per queue */
334 /* Number of rx descriptors in use */
338 * Used in case RX Ring is empty, which can be caused when
339 * system does not have resources (skb's)
341 struct timer_list timeout;
345 struct mii_if_info mii;
348 /* Port operation control routines */
349 static void eth_port_init(struct mv643xx_private *mp);
350 static void eth_port_reset(unsigned int eth_port_num);
351 static void eth_port_start(struct net_device *dev);
353 /* PHY and MIB routines */
354 static void ethernet_phy_reset(unsigned int eth_port_num);
356 static void eth_port_write_smi_reg(unsigned int eth_port_num,
357 unsigned int phy_reg, unsigned int value);
359 static void eth_port_read_smi_reg(unsigned int eth_port_num,
360 unsigned int phy_reg, unsigned int *value);
362 static void eth_clear_mib_counters(unsigned int eth_port_num);
364 /* Port data flow control routines */
365 static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp,
366 struct pkt_info *p_pkt_info);
367 static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp,
368 struct pkt_info *p_pkt_info);
370 #endif /* __MV643XX_ETH_H__ */