drivers/net/ethernet/amd/xgbe/xgbe.h

   1 /*
   2  * AMD 10Gb Ethernet driver
   3  *
   4  * This file is available to you under your choice of the following two
   5  * licenses:
   6  *
   7  * License 1: GPLv2
   8  *
   9  * Copyright (c) 2014 Advanced Micro Devices, Inc.
  10  *
  11  * This file is free software; you may copy, redistribute and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation, either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  * This file is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  *
  24  * This file incorporates work covered by the following copyright and
  25  * permission notice:
  26  *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
  27  *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
  28  *     Inc. unless otherwise expressly agreed to in writing between Synopsys
  29  *     and you.
  30  *
  31  *     The Software IS NOT an item of Licensed Software or Licensed Product
  32  *     under any End User Software License Agreement or Agreement for Licensed
  33  *     Product with Synopsys or any supplement thereto.  Permission is hereby
  34  *     granted, free of charge, to any person obtaining a copy of this software
  35  *     annotated with this license and the Software, to deal in the Software
  36  *     without restriction, including without limitation the rights to use,
  37  *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  38  *     of the Software, and to permit persons to whom the Software is furnished
  39  *     to do so, subject to the following conditions:
  40  *
  41  *     The above copyright notice and this permission notice shall be included
  42  *     in all copies or substantial portions of the Software.
  43  *
  44  *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
  45  *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  46  *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  47  *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
  48  *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  49  *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  50  *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  51  *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  52  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  53  *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  54  *     THE POSSIBILITY OF SUCH DAMAGE.
  55  *
  56  *
  57  * License 2: Modified BSD
  58  *
  59  * Copyright (c) 2014 Advanced Micro Devices, Inc.
  60  * All rights reserved.
  61  *
  62  * Redistribution and use in source and binary forms, with or without
  63  * modification, are permitted provided that the following conditions are met:
  64  *     * Redistributions of source code must retain the above copyright
  65  *       notice, this list of conditions and the following disclaimer.
  66  *     * Redistributions in binary form must reproduce the above copyright
  67  *       notice, this list of conditions and the following disclaimer in the
  68  *       documentation and/or other materials provided with the distribution.
  69  *     * Neither the name of Advanced Micro Devices, Inc. nor the
  70  *       names of its contributors may be used to endorse or promote products
  71  *       derived from this software without specific prior written permission.
  72  *
  73  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  74  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  75  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  76  * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
  77  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  78  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  79  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  80  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  81  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  82  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  83  *
  84  * This file incorporates work covered by the following copyright and
  85  * permission notice:
  86  *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
  87  *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
  88  *     Inc. unless otherwise expressly agreed to in writing between Synopsys
  89  *     and you.
  90  *
  91  *     The Software IS NOT an item of Licensed Software or Licensed Product
  92  *     under any End User Software License Agreement or Agreement for Licensed
  93  *     Product with Synopsys or any supplement thereto.  Permission is hereby
  94  *     granted, free of charge, to any person obtaining a copy of this software
  95  *     annotated with this license and the Software, to deal in the Software
  96  *     without restriction, including without limitation the rights to use,
  97  *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  98  *     of the Software, and to permit persons to whom the Software is furnished
  99  *     to do so, subject to the following conditions:
 100  *
 101  *     The above copyright notice and this permission notice shall be included
 102  *     in all copies or substantial portions of the Software.
 103  *
 104  *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 105  *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 106  *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 107  *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 108  *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 109  *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 110  *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 111  *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 112  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 113  *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 114  *     THE POSSIBILITY OF SUCH DAMAGE.
 115  */
 116
 117 #ifndef __XGBE_H__
 118 #define __XGBE_H__
 119
 120 #include <linux/dma-mapping.h>
 121 #include <linux/netdevice.h>
 122 #include <linux/workqueue.h>
 123 #include <linux/phy.h>
 124 #include <linux/if_vlan.h>
 125 #include <linux/bitops.h>
 126 #include <linux/ptp_clock_kernel.h>
 127 #include <linux/clocksource.h>
 128 #include <linux/net_tstamp.h>
 129 #include <net/dcbnl.h>
 130
 131 #define XGBE_DRV_NAME           "amd-xgbe"
 132 #define XGBE_DRV_VERSION        "1.0.0-a"
 133 #define XGBE_DRV_DESC           "AMD 10 Gigabit Ethernet Driver"
 134
 135 /* Descriptor related defines */
 136 #define XGBE_TX_DESC_CNT        512
 137 #define XGBE_TX_DESC_MIN_FREE   (XGBE_TX_DESC_CNT >> 3)
 138 #define XGBE_TX_DESC_MAX_PROC   (XGBE_TX_DESC_CNT >> 1)
 139 #define XGBE_RX_DESC_CNT        512
 140
 141 #define XGBE_TX_MAX_BUF_SIZE    (0x3fff & ~(64 - 1))
 142
 143 /* Descriptors required for maximum contigous TSO/GSO packet */
 144 #define XGBE_TX_MAX_SPLIT       ((GSO_MAX_SIZE / XGBE_TX_MAX_BUF_SIZE) + 1)
 145
 146 /* Maximum possible descriptors needed for an SKB:
 147  * - Maximum number of SKB frags
 148  * - Maximum descriptors for contiguous TSO/GSO packet
 149  * - Possible context descriptor
 150  * - Possible TSO header descriptor
 151  */
 152 #define XGBE_TX_MAX_DESCS       (MAX_SKB_FRAGS + XGBE_TX_MAX_SPLIT + 2)
 153
 154 #define XGBE_RX_MIN_BUF_SIZE    (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
 155 #define XGBE_RX_BUF_ALIGN       64
 156 #define XGBE_SKB_ALLOC_SIZE     256
 157 #define XGBE_SPH_HDSMS_SIZE     2       /* Keep in sync with SKB_ALLOC_SIZE */
 158
 159 #define XGBE_MAX_DMA_CHANNELS   16
 160 #define XGBE_MAX_QUEUES         16
 161 #define XGBE_DMA_STOP_TIMEOUT   5
 162
 163 /* DMA cache settings - Outer sharable, write-back, write-allocate */
 164 #define XGBE_DMA_OS_AXDOMAIN    0x2
 165 #define XGBE_DMA_OS_ARCACHE     0xb
 166 #define XGBE_DMA_OS_AWCACHE     0xf
 167
 168 /* DMA cache settings - System, no caches used */
 169 #define XGBE_DMA_SYS_AXDOMAIN   0x3
 170 #define XGBE_DMA_SYS_ARCACHE    0x0
 171 #define XGBE_DMA_SYS_AWCACHE    0x0
 172
 173 #define XGBE_DMA_INTERRUPT_MASK 0x31c7
 174
 175 #define XGMAC_MIN_PACKET        60
 176 #define XGMAC_STD_PACKET_MTU    1500
 177 #define XGMAC_MAX_STD_PACKET    1518
 178 #define XGMAC_JUMBO_PACKET_MTU  9000
 179 #define XGMAC_MAX_JUMBO_PACKET  9018
 180
 181 /* MDIO bus phy name */
 182 #define XGBE_PHY_NAME           "amd_xgbe_phy"
 183 #define XGBE_PRTAD              0
 184
 185 /* Device-tree clock names */
 186 #define XGBE_DMA_CLOCK          "dma_clk"
 187 #define XGBE_PTP_CLOCK          "ptp_clk"
 188 #define XGBE_DMA_IRQS           "amd,per-channel-interrupt"
 189
 190 /* Timestamp support - values based on 50MHz PTP clock
 191  *   50MHz => 20 nsec
 192  */
 193 #define XGBE_TSTAMP_SSINC       20
 194 #define XGBE_TSTAMP_SNSINC      0
 195
 196 /* Driver PMT macros */
 197 #define XGMAC_DRIVER_CONTEXT    1
 198 #define XGMAC_IOCTL_CONTEXT     2
 199
 200 #define XGBE_FIFO_MAX           81920
 201 #define XGBE_FIFO_SIZE_B(x)     (x)
 202 #define XGBE_FIFO_SIZE_KB(x)    (x * 1024)
 203
 204 #define XGBE_TC_MIN_QUANTUM     10
 205
 206 /* Helper macro for descriptor handling
 207  *  Always use XGBE_GET_DESC_DATA to access the descriptor data
 208  *  since the index is free-running and needs to be and-ed
 209  *  with the descriptor count value of the ring to index to
 210  *  the proper descriptor data.
 211  */
 212 #define XGBE_GET_DESC_DATA(_ring, _idx)                         \
 213         ((_ring)->rdata +                                       \
 214          ((_idx) & ((_ring)->rdesc_count - 1)))
 215
 216 /* Default coalescing parameters */
 217 #define XGMAC_INIT_DMA_TX_USECS         50
 218 #define XGMAC_INIT_DMA_TX_FRAMES        25
 219
 220 #define XGMAC_MAX_DMA_RIWT              0xff
 221 #define XGMAC_INIT_DMA_RX_USECS         30
 222 #define XGMAC_INIT_DMA_RX_FRAMES        25
 223
 224 /* Flow control queue count */
 225 #define XGMAC_MAX_FLOW_CONTROL_QUEUES   8
 226
 227 /* Maximum MAC address hash table size (256 bits = 8 bytes) */
 228 #define XGBE_MAC_HASH_TABLE_SIZE        8
 229
 230 /* Receive Side Scaling */
 231 #define XGBE_RSS_HASH_KEY_SIZE          40
 232 #define XGBE_RSS_MAX_TABLE_SIZE         256
 233 #define XGBE_RSS_LOOKUP_TABLE_TYPE      0
 234 #define XGBE_RSS_HASH_KEY_TYPE          1
 235
 236 struct xgbe_prv_data;
 237
 238 struct xgbe_packet_data {
 239         struct sk_buff *skb;
 240
 241         unsigned int attributes;
 242
 243         unsigned int errors;
 244
 245         unsigned int rdesc_count;
 246         unsigned int length;
 247
 248         unsigned int header_len;
 249         unsigned int tcp_header_len;
 250         unsigned int tcp_payload_len;
 251         unsigned short mss;
 252
 253         unsigned short vlan_ctag;
 254
 255         u64 rx_tstamp;
 256
 257         u32 rss_hash;
 258         enum pkt_hash_types rss_hash_type;
 259
 260         unsigned int tx_packets;
 261         unsigned int tx_bytes;
 262 };
 263
 264 /* Common Rx and Tx descriptor mapping */
 265 struct xgbe_ring_desc {
 266         __le32 desc0;
 267         __le32 desc1;
 268         __le32 desc2;
 269         __le32 desc3;
 270 };
 271
 272 /* Page allocation related values */
 273 struct xgbe_page_alloc {
 274         struct page *pages;
 275         unsigned int pages_len;
 276         unsigned int pages_offset;
 277
 278         dma_addr_t pages_dma;
 279 };
 280
 281 /* Ring entry buffer data */
 282 struct xgbe_buffer_data {
 283         struct xgbe_page_alloc pa;
 284         struct xgbe_page_alloc pa_unmap;
 285
 286         dma_addr_t dma;
 287         unsigned int dma_len;
 288 };
 289
 290 /* Tx-related ring data */
 291 struct xgbe_tx_ring_data {
 292         unsigned int packets;           /* BQL packet count */
 293         unsigned int bytes;             /* BQL byte count */
 294 };
 295
 296 /* Rx-related ring data */
 297 struct xgbe_rx_ring_data {
 298         struct xgbe_buffer_data hdr;    /* Header locations */
 299         struct xgbe_buffer_data buf;    /* Payload locations */
 300
 301         unsigned short hdr_len;         /* Length of received header */
 302         unsigned short len;             /* Length of received packet */
 303 };
 304
 305 /* Structure used to hold information related to the descriptor
 306  * and the packet associated with the descriptor (always use
 307  * use the XGBE_GET_DESC_DATA macro to access this data from the ring)
 308  */
 309 struct xgbe_ring_data {
 310         struct xgbe_ring_desc *rdesc;   /* Virtual address of descriptor */
 311         dma_addr_t rdesc_dma;           /* DMA address of descriptor */
 312
 313         struct sk_buff *skb;            /* Virtual address of SKB */
 314         dma_addr_t skb_dma;             /* DMA address of SKB data */
 315         unsigned int skb_dma_len;       /* Length of SKB DMA area */
 316
 317         struct xgbe_tx_ring_data tx;    /* Tx-related data */
 318         struct xgbe_rx_ring_data rx;    /* Rx-related data */
 319
 320         unsigned int interrupt;         /* Interrupt indicator */
 321
 322         unsigned int mapped_as_page;
 323
 324         /* Incomplete receive save location.  If the budget is exhausted
 325          * or the last descriptor (last normal descriptor or a following
 326          * context descriptor) has not been DMA'd yet the current state
 327          * of the receive processing needs to be saved.
 328          */
 329         unsigned int state_saved;
 330         struct {
 331                 unsigned int incomplete;
 332                 unsigned int context_next;
 333                 struct sk_buff *skb;
 334                 unsigned int len;
 335                 unsigned int error;
 336         } state;
 337 };
 338
 339 struct xgbe_ring {
 340         /* Ring lock - used just for TX rings at the moment */
 341         spinlock_t lock;
 342
 343         /* Per packet related information */
 344         struct xgbe_packet_data packet_data;
 345
 346         /* Virtual/DMA addresses and count of allocated descriptor memory */
 347         struct xgbe_ring_desc *rdesc;
 348         dma_addr_t rdesc_dma;
 349         unsigned int rdesc_count;
 350
 351         /* Array of descriptor data corresponding the descriptor memory
 352          * (always use the XGBE_GET_DESC_DATA macro to access this data)
 353          */
 354         struct xgbe_ring_data *rdata;
 355
 356         /* Page allocation for RX buffers */
 357         struct xgbe_page_alloc rx_hdr_pa;
 358         struct xgbe_page_alloc rx_buf_pa;
 359
 360         /* Ring index values
 361          *  cur   - Tx: index of descriptor to be used for current transfer
 362          *          Rx: index of descriptor to check for packet availability
 363          *  dirty - Tx: index of descriptor to check for transfer complete
 364          *          Rx: count of descriptors in which a packet has been received
 365          *              (used with skb_realloc_index to refresh the ring)
 366          */
 367         unsigned int cur;
 368         unsigned int dirty;
 369
 370         /* Coalesce frame count used for interrupt bit setting */
 371         unsigned int coalesce_count;
 372
 373         union {
 374                 struct {
 375                         unsigned int queue_stopped;
 376                         unsigned int xmit_more;
 377                         unsigned short cur_mss;
 378                         unsigned short cur_vlan_ctag;
 379                 } tx;
 380
 381                 struct {
 382                         unsigned int realloc_index;
 383                         unsigned int realloc_threshold;
 384                 } rx;
 385         };
 386 } ____cacheline_aligned;
 387
 388 /* Structure used to describe the descriptor rings associated with
 389  * a DMA channel.
 390  */
 391 struct xgbe_channel {
 392         char name[16];
 393
 394         /* Address of private data area for device */
 395         struct xgbe_prv_data *pdata;
 396
 397         /* Queue index and base address of queue's DMA registers */
 398         unsigned int queue_index;
 399         void __iomem *dma_regs;
 400
 401         /* Per channel interrupt irq number */
 402         int dma_irq;
 403         char dma_irq_name[IFNAMSIZ + 32];
 404
 405         /* Netdev related settings */
 406         struct napi_struct napi;
 407
 408         unsigned int saved_ier;
 409
 410         unsigned int tx_timer_active;
 411         struct hrtimer tx_timer;
 412
 413         struct xgbe_ring *tx_ring;
 414         struct xgbe_ring *rx_ring;
 415 } ____cacheline_aligned;
 416
 417 enum xgbe_int {
 418         XGMAC_INT_DMA_CH_SR_TI,
 419         XGMAC_INT_DMA_CH_SR_TPS,
 420         XGMAC_INT_DMA_CH_SR_TBU,
 421         XGMAC_INT_DMA_CH_SR_RI,
 422         XGMAC_INT_DMA_CH_SR_RBU,
 423         XGMAC_INT_DMA_CH_SR_RPS,
 424         XGMAC_INT_DMA_CH_SR_TI_RI,
 425         XGMAC_INT_DMA_CH_SR_FBE,
 426         XGMAC_INT_DMA_ALL,
 427 };
 428
 429 enum xgbe_int_state {
 430         XGMAC_INT_STATE_SAVE,
 431         XGMAC_INT_STATE_RESTORE,
 432 };
 433
 434 enum xgbe_mtl_fifo_size {
 435         XGMAC_MTL_FIFO_SIZE_256  = 0x00,
 436         XGMAC_MTL_FIFO_SIZE_512  = 0x01,
 437         XGMAC_MTL_FIFO_SIZE_1K   = 0x03,
 438         XGMAC_MTL_FIFO_SIZE_2K   = 0x07,
 439         XGMAC_MTL_FIFO_SIZE_4K   = 0x0f,
 440         XGMAC_MTL_FIFO_SIZE_8K   = 0x1f,
 441         XGMAC_MTL_FIFO_SIZE_16K  = 0x3f,
 442         XGMAC_MTL_FIFO_SIZE_32K  = 0x7f,
 443         XGMAC_MTL_FIFO_SIZE_64K  = 0xff,
 444         XGMAC_MTL_FIFO_SIZE_128K = 0x1ff,
 445         XGMAC_MTL_FIFO_SIZE_256K = 0x3ff,
 446 };
 447
 448 struct xgbe_mmc_stats {
 449         /* Tx Stats */
 450         u64 txoctetcount_gb;
 451         u64 txframecount_gb;
 452         u64 txbroadcastframes_g;
 453         u64 txmulticastframes_g;
 454         u64 tx64octets_gb;
 455         u64 tx65to127octets_gb;
 456         u64 tx128to255octets_gb;
 457         u64 tx256to511octets_gb;
 458         u64 tx512to1023octets_gb;
 459         u64 tx1024tomaxoctets_gb;
 460         u64 txunicastframes_gb;
 461         u64 txmulticastframes_gb;
 462         u64 txbroadcastframes_gb;
 463         u64 txunderflowerror;
 464         u64 txoctetcount_g;
 465         u64 txframecount_g;
 466         u64 txpauseframes;
 467         u64 txvlanframes_g;
 468
 469         /* Rx Stats */
 470         u64 rxframecount_gb;
 471         u64 rxoctetcount_gb;
 472         u64 rxoctetcount_g;
 473         u64 rxbroadcastframes_g;
 474         u64 rxmulticastframes_g;
 475         u64 rxcrcerror;
 476         u64 rxrunterror;
 477         u64 rxjabbererror;
 478         u64 rxundersize_g;
 479         u64 rxoversize_g;
 480         u64 rx64octets_gb;
 481         u64 rx65to127octets_gb;
 482         u64 rx128to255octets_gb;
 483         u64 rx256to511octets_gb;
 484         u64 rx512to1023octets_gb;
 485         u64 rx1024tomaxoctets_gb;
 486         u64 rxunicastframes_g;
 487         u64 rxlengtherror;
 488         u64 rxoutofrangetype;
 489         u64 rxpauseframes;
 490         u64 rxfifooverflow;
 491         u64 rxvlanframes_gb;
 492         u64 rxwatchdogerror;
 493 };
 494
 495 struct xgbe_hw_if {
 496         int (*tx_complete)(struct xgbe_ring_desc *);
 497
 498         int (*set_promiscuous_mode)(struct xgbe_prv_data *, unsigned int);
 499         int (*set_all_multicast_mode)(struct xgbe_prv_data *, unsigned int);
 500         int (*add_mac_addresses)(struct xgbe_prv_data *);
 501         int (*set_mac_address)(struct xgbe_prv_data *, u8 *addr);
 502
 503         int (*enable_rx_csum)(struct xgbe_prv_data *);
 504         int (*disable_rx_csum)(struct xgbe_prv_data *);
 505
 506         int (*enable_rx_vlan_stripping)(struct xgbe_prv_data *);
 507         int (*disable_rx_vlan_stripping)(struct xgbe_prv_data *);
 508         int (*enable_rx_vlan_filtering)(struct xgbe_prv_data *);
 509         int (*disable_rx_vlan_filtering)(struct xgbe_prv_data *);
 510         int (*update_vlan_hash_table)(struct xgbe_prv_data *);
 511
 512         int (*read_mmd_regs)(struct xgbe_prv_data *, int, int);
 513         void (*write_mmd_regs)(struct xgbe_prv_data *, int, int, int);
 514         int (*set_gmii_speed)(struct xgbe_prv_data *);
 515         int (*set_gmii_2500_speed)(struct xgbe_prv_data *);
 516         int (*set_xgmii_speed)(struct xgbe_prv_data *);
 517
 518         void (*enable_tx)(struct xgbe_prv_data *);
 519         void (*disable_tx)(struct xgbe_prv_data *);
 520         void (*enable_rx)(struct xgbe_prv_data *);
 521         void (*disable_rx)(struct xgbe_prv_data *);
 522
 523         void (*powerup_tx)(struct xgbe_prv_data *);
 524         void (*powerdown_tx)(struct xgbe_prv_data *);
 525         void (*powerup_rx)(struct xgbe_prv_data *);
 526         void (*powerdown_rx)(struct xgbe_prv_data *);
 527
 528         int (*init)(struct xgbe_prv_data *);
 529         int (*exit)(struct xgbe_prv_data *);
 530
 531         int (*enable_int)(struct xgbe_channel *, enum xgbe_int);
 532         int (*disable_int)(struct xgbe_channel *, enum xgbe_int);
 533         void (*dev_xmit)(struct xgbe_channel *);
 534         int (*dev_read)(struct xgbe_channel *);
 535         void (*tx_desc_init)(struct xgbe_channel *);
 536         void (*rx_desc_init)(struct xgbe_channel *);
 537         void (*rx_desc_reset)(struct xgbe_ring_data *);
 538         void (*tx_desc_reset)(struct xgbe_ring_data *);
 539         int (*is_last_desc)(struct xgbe_ring_desc *);
 540         int (*is_context_desc)(struct xgbe_ring_desc *);
 541         void (*tx_start_xmit)(struct xgbe_channel *, struct xgbe_ring *);
 542
 543         /* For FLOW ctrl */
 544         int (*config_tx_flow_control)(struct xgbe_prv_data *);
 545         int (*config_rx_flow_control)(struct xgbe_prv_data *);
 546
 547         /* For RX coalescing */
 548         int (*config_rx_coalesce)(struct xgbe_prv_data *);
 549         int (*config_tx_coalesce)(struct xgbe_prv_data *);
 550         unsigned int (*usec_to_riwt)(struct xgbe_prv_data *, unsigned int);
 551         unsigned int (*riwt_to_usec)(struct xgbe_prv_data *, unsigned int);
 552
 553         /* For RX and TX threshold config */
 554         int (*config_rx_threshold)(struct xgbe_prv_data *, unsigned int);
 555         int (*config_tx_threshold)(struct xgbe_prv_data *, unsigned int);
 556
 557         /* For RX and TX Store and Forward Mode config */
 558         int (*config_rsf_mode)(struct xgbe_prv_data *, unsigned int);
 559         int (*config_tsf_mode)(struct xgbe_prv_data *, unsigned int);
 560
 561         /* For TX DMA Operate on Second Frame config */
 562         int (*config_osp_mode)(struct xgbe_prv_data *);
 563
 564         /* For RX and TX PBL config */
 565         int (*config_rx_pbl_val)(struct xgbe_prv_data *);
 566         int (*get_rx_pbl_val)(struct xgbe_prv_data *);
 567         int (*config_tx_pbl_val)(struct xgbe_prv_data *);
 568         int (*get_tx_pbl_val)(struct xgbe_prv_data *);
 569         int (*config_pblx8)(struct xgbe_prv_data *);
 570
 571         /* For MMC statistics */
 572         void (*rx_mmc_int)(struct xgbe_prv_data *);
 573         void (*tx_mmc_int)(struct xgbe_prv_data *);
 574         void (*read_mmc_stats)(struct xgbe_prv_data *);
 575
 576         /* For Timestamp config */
 577         int (*config_tstamp)(struct xgbe_prv_data *, unsigned int);
 578         void (*update_tstamp_addend)(struct xgbe_prv_data *, unsigned int);
 579         void (*set_tstamp_time)(struct xgbe_prv_data *, unsigned int sec,
 580                                 unsigned int nsec);
 581         u64 (*get_tstamp_time)(struct xgbe_prv_data *);
 582         u64 (*get_tx_tstamp)(struct xgbe_prv_data *);
 583
 584         /* For Data Center Bridging config */
 585         void (*config_dcb_tc)(struct xgbe_prv_data *);
 586         void (*config_dcb_pfc)(struct xgbe_prv_data *);
 587
 588         /* For Receive Side Scaling */
 589         int (*enable_rss)(struct xgbe_prv_data *);
 590         int (*disable_rss)(struct xgbe_prv_data *);
 591         int (*set_rss_hash_key)(struct xgbe_prv_data *, const u8 *);
 592         int (*set_rss_lookup_table)(struct xgbe_prv_data *, const u32 *);
 593 };
 594
 595 struct xgbe_desc_if {
 596         int (*alloc_ring_resources)(struct xgbe_prv_data *);
 597         void (*free_ring_resources)(struct xgbe_prv_data *);
 598         int (*map_tx_skb)(struct xgbe_channel *, struct sk_buff *);
 599         void (*realloc_rx_buffer)(struct xgbe_channel *);
 600         void (*unmap_rdata)(struct xgbe_prv_data *, struct xgbe_ring_data *);
 601         void (*wrapper_tx_desc_init)(struct xgbe_prv_data *);
 602         void (*wrapper_rx_desc_init)(struct xgbe_prv_data *);
 603 };
 604
 605 /* This structure contains flags that indicate what hardware features
 606  * or configurations are present in the device.
 607  */
 608 struct xgbe_hw_features {
 609         /* HW Version */
 610         unsigned int version;
 611
 612         /* HW Feature Register0 */
 613         unsigned int gmii;              /* 1000 Mbps support */
 614         unsigned int vlhash;            /* VLAN Hash Filter */
 615         unsigned int sma;               /* SMA(MDIO) Interface */
 616         unsigned int rwk;               /* PMT remote wake-up packet */
 617         unsigned int mgk;               /* PMT magic packet */
 618         unsigned int mmc;               /* RMON module */
 619         unsigned int aoe;               /* ARP Offload */
 620         unsigned int ts;                /* IEEE 1588-2008 Adavanced Timestamp */
 621         unsigned int eee;               /* Energy Efficient Ethernet */
 622         unsigned int tx_coe;            /* Tx Checksum Offload */
 623         unsigned int rx_coe;            /* Rx Checksum Offload */
 624         unsigned int addn_mac;          /* Additional MAC Addresses */
 625         unsigned int ts_src;            /* Timestamp Source */
 626         unsigned int sa_vlan_ins;       /* Source Address or VLAN Insertion */
 627
 628         /* HW Feature Register1 */
 629         unsigned int rx_fifo_size;      /* MTL Receive FIFO Size */
 630         unsigned int tx_fifo_size;      /* MTL Transmit FIFO Size */
 631         unsigned int adv_ts_hi;         /* Advance Timestamping High Word */
 632         unsigned int dcb;               /* DCB Feature */
 633         unsigned int sph;               /* Split Header Feature */
 634         unsigned int tso;               /* TCP Segmentation Offload */
 635         unsigned int dma_debug;         /* DMA Debug Registers */
 636         unsigned int rss;               /* Receive Side Scaling */
 637         unsigned int tc_cnt;            /* Number of Traffic Classes */
 638         unsigned int hash_table_size;   /* Hash Table Size */
 639         unsigned int l3l4_filter_num;   /* Number of L3-L4 Filters */
 640
 641         /* HW Feature Register2 */
 642         unsigned int rx_q_cnt;          /* Number of MTL Receive Queues */
 643         unsigned int tx_q_cnt;          /* Number of MTL Transmit Queues */
 644         unsigned int rx_ch_cnt;         /* Number of DMA Receive Channels */
 645         unsigned int tx_ch_cnt;         /* Number of DMA Transmit Channels */
 646         unsigned int pps_out_num;       /* Number of PPS outputs */
 647         unsigned int aux_snap_num;      /* Number of Aux snapshot inputs */
 648 };
 649
 650 struct xgbe_prv_data {
 651         struct net_device *netdev;
 652         struct platform_device *pdev;
 653         struct device *dev;
 654
 655         /* XGMAC/XPCS related mmio registers */
 656         void __iomem *xgmac_regs;       /* XGMAC CSRs */
 657         void __iomem *xpcs_regs;        /* XPCS MMD registers */
 658
 659         /* Overall device lock */
 660         spinlock_t lock;
 661
 662         /* XPCS indirect addressing mutex */
 663         struct mutex xpcs_mutex;
 664
 665         /* RSS addressing mutex */
 666         struct mutex rss_mutex;
 667
 668         int dev_irq;
 669         unsigned int per_channel_irq;
 670
 671         const struct xgbe_hw_if *hw_if;
 672         const struct xgbe_desc_if *desc_if;
 673
 674         /* AXI DMA settings */
 675         unsigned int axdomain;
 676         unsigned int arcache;
 677         unsigned int awcache;
 678
 679         /* Rings for Tx/Rx on a DMA channel */
 680         struct xgbe_channel *channel;
 681         unsigned int channel_count;
 682         unsigned int tx_ring_count;
 683         unsigned int tx_desc_count;
 684         unsigned int rx_ring_count;
 685         unsigned int rx_desc_count;
 686
 687         unsigned int tx_q_count;
 688         unsigned int rx_q_count;
 689
 690         /* Tx/Rx common settings */
 691         unsigned int pblx8;
 692
 693         /* Tx settings */
 694         unsigned int tx_sf_mode;
 695         unsigned int tx_threshold;
 696         unsigned int tx_pbl;
 697         unsigned int tx_osp_mode;
 698
 699         /* Rx settings */
 700         unsigned int rx_sf_mode;
 701         unsigned int rx_threshold;
 702         unsigned int rx_pbl;
 703
 704         /* Tx coalescing settings */
 705         unsigned int tx_usecs;
 706         unsigned int tx_frames;
 707
 708         /* Rx coalescing settings */
 709         unsigned int rx_riwt;
 710         unsigned int rx_frames;
 711
 712         /* Current Rx buffer size */
 713         unsigned int rx_buf_size;
 714
 715         /* Flow control settings */
 716         unsigned int pause_autoneg;
 717         unsigned int tx_pause;
 718         unsigned int rx_pause;
 719
 720         /* Receive Side Scaling settings */
 721         u8 rss_key[XGBE_RSS_HASH_KEY_SIZE];
 722         u32 rss_table[XGBE_RSS_MAX_TABLE_SIZE];
 723         u32 rss_options;
 724
 725         /* MDIO settings */
 726         struct module *phy_module;
 727         char *mii_bus_id;
 728         struct mii_bus *mii;
 729         int mdio_mmd;
 730         struct phy_device *phydev;
 731         int default_autoneg;
 732         int default_speed;
 733
 734         /* Current PHY settings */
 735         phy_interface_t phy_mode;
 736         int phy_link;
 737         int phy_speed;
 738         unsigned int phy_tx_pause;
 739         unsigned int phy_rx_pause;
 740
 741         /* Netdev related settings */
 742         netdev_features_t netdev_features;
 743         struct napi_struct napi;
 744         struct xgbe_mmc_stats mmc_stats;
 745
 746         /* Filtering support */
 747         unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 748
 749         /* Device clocks */
 750         struct clk *sysclk;
 751         struct clk *ptpclk;
 752
 753         /* Timestamp support */
 754         spinlock_t tstamp_lock;
 755         struct ptp_clock_info ptp_clock_info;
 756         struct ptp_clock *ptp_clock;
 757         struct hwtstamp_config tstamp_config;
 758         struct cyclecounter tstamp_cc;
 759         struct timecounter tstamp_tc;
 760         unsigned int tstamp_addend;
 761         struct work_struct tx_tstamp_work;
 762         struct sk_buff *tx_tstamp_skb;
 763         u64 tx_tstamp;
 764
 765         /* DCB support */
 766         struct ieee_ets *ets;
 767         struct ieee_pfc *pfc;
 768         unsigned int q2tc_map[XGBE_MAX_QUEUES];
 769         unsigned int prio2q_map[IEEE_8021QAZ_MAX_TCS];
 770
 771         /* Hardware features of the device */
 772         struct xgbe_hw_features hw_feat;
 773
 774         /* Device restart work structure */
 775         struct work_struct restart_work;
 776
 777         /* Keeps track of power mode */
 778         unsigned int power_down;
 779
 780 #ifdef CONFIG_DEBUG_FS
 781         struct dentry *xgbe_debugfs;
 782
 783         unsigned int debugfs_xgmac_reg;
 784
 785         unsigned int debugfs_xpcs_mmd;
 786         unsigned int debugfs_xpcs_reg;
 787 #endif
 788 };
 789
 790 extern const struct xgbe_hw_if default_xgbe_hw_if;
 791 extern const struct xgbe_desc_if default_xgbe_desc_if;
 792
 793 /* Function prototypes*/
 794
 795 void xgbe_init_function_ptrs_dev(struct xgbe_hw_if *);
 796 void xgbe_init_function_ptrs_desc(struct xgbe_desc_if *);
 797 struct net_device_ops *xgbe_get_netdev_ops(void);
 798 struct ethtool_ops *xgbe_get_ethtool_ops(void);
 799 #ifdef CONFIG_AMD_XGBE_DCB
 800 const struct dcbnl_rtnl_ops *xgbe_get_dcbnl_ops(void);
 801 #endif
 802
 803 int xgbe_mdio_register(struct xgbe_prv_data *);
 804 void xgbe_mdio_unregister(struct xgbe_prv_data *);
 805 void xgbe_dump_phy_registers(struct xgbe_prv_data *);
 806 void xgbe_ptp_register(struct xgbe_prv_data *);
 807 void xgbe_ptp_unregister(struct xgbe_prv_data *);
 808 void xgbe_dump_tx_desc(struct xgbe_ring *, unsigned int, unsigned int,
 809                        unsigned int);
 810 void xgbe_dump_rx_desc(struct xgbe_ring *, struct xgbe_ring_desc *,
 811                        unsigned int);
 812 void xgbe_print_pkt(struct net_device *, struct sk_buff *, bool);
 813 void xgbe_get_all_hw_features(struct xgbe_prv_data *);
 814 int xgbe_powerup(struct net_device *, unsigned int);
 815 int xgbe_powerdown(struct net_device *, unsigned int);
 816 void xgbe_init_rx_coalesce(struct xgbe_prv_data *);
 817 void xgbe_init_tx_coalesce(struct xgbe_prv_data *);
 818
 819 #ifdef CONFIG_DEBUG_FS
 820 void xgbe_debugfs_init(struct xgbe_prv_data *);
 821 void xgbe_debugfs_exit(struct xgbe_prv_data *);
 822 #else
 823 static inline void xgbe_debugfs_init(struct xgbe_prv_data *pdata) {}
 824 static inline void xgbe_debugfs_exit(struct xgbe_prv_data *pdata) {}
 825 #endif /* CONFIG_DEBUG_FS */
 826
 827 /* NOTE: Uncomment for TX and RX DESCRIPTOR DUMP in KERNEL LOG */
 828 #if 0
 829 #define XGMAC_ENABLE_TX_DESC_DUMP
 830 #define XGMAC_ENABLE_RX_DESC_DUMP
 831 #endif
 832
 833 /* NOTE: Uncomment for TX and RX PACKET DUMP in KERNEL LOG */
 834 #if 0
 835 #define XGMAC_ENABLE_TX_PKT_DUMP
 836 #define XGMAC_ENABLE_RX_PKT_DUMP
 837 #endif
 838
 839 /* NOTE: Uncomment for function trace log messages in KERNEL LOG */
 840 #if 0
 841 #define YDEBUG
 842 #define YDEBUG_MDIO
 843 #endif
 844
 845 /* For debug prints */
 846 #ifdef YDEBUG
 847 #define DBGPR(x...) pr_alert(x)
 848 #define DBGPHY_REGS(x...) xgbe_dump_phy_registers(x)
 849 #else
 850 #define DBGPR(x...) do { } while (0)
 851 #define DBGPHY_REGS(x...) do { } while (0)
 852 #endif
 853
 854 #ifdef YDEBUG_MDIO
 855 #define DBGPR_MDIO(x...) pr_alert(x)
 856 #else
 857 #define DBGPR_MDIO(x...) do { } while (0)
 858 #endif
 859
 860 #endif