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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * linux/drivers/net/ethernet/ibm/ehea/ehea_qmr.h4 *5 * eHEA ethernet device driver for IBM eServer System p6 *7 * (C) Copyright IBM Corp. 20068 *9 * Authors:10 * Christoph Raisch <raisch@de.ibm.com>11 * Jan-Bernd Themann <themann@de.ibm.com>12 * Thomas Klein <tklein@de.ibm.com>13 */14 15#ifndef __EHEA_QMR_H__16#define __EHEA_QMR_H__17 18#include <linux/prefetch.h>19#include "ehea.h"20#include "ehea_hw.h"21 22/*23 * page size of ehea hardware queues24 */25 26#define EHEA_PAGESHIFT 1227#define EHEA_PAGESIZE (1UL << EHEA_PAGESHIFT)28#define EHEA_SECTSIZE (1UL << 24)29#define EHEA_PAGES_PER_SECTION (EHEA_SECTSIZE >> EHEA_PAGESHIFT)30#define EHEA_HUGEPAGESHIFT 3431#define EHEA_HUGEPAGE_SIZE (1UL << EHEA_HUGEPAGESHIFT)32#define EHEA_HUGEPAGE_PFN_MASK ((EHEA_HUGEPAGE_SIZE - 1) >> PAGE_SHIFT)33 34#if ((1UL << SECTION_SIZE_BITS) < EHEA_SECTSIZE)35#error eHEA module cannot work if kernel sectionsize < ehea sectionsize36#endif37 38/* Some abbreviations used here:39 *40 * WQE - Work Queue Entry41 * SWQE - Send Work Queue Entry42 * RWQE - Receive Work Queue Entry43 * CQE - Completion Queue Entry44 * EQE - Event Queue Entry45 * MR - Memory Region46 */47 48/* Use of WR_ID field for EHEA */49#define EHEA_WR_ID_COUNT EHEA_BMASK_IBM(0, 19)50#define EHEA_WR_ID_TYPE EHEA_BMASK_IBM(20, 23)51#define EHEA_SWQE2_TYPE 0x152#define EHEA_SWQE3_TYPE 0x253#define EHEA_RWQE2_TYPE 0x354#define EHEA_RWQE3_TYPE 0x455#define EHEA_WR_ID_INDEX EHEA_BMASK_IBM(24, 47)56#define EHEA_WR_ID_REFILL EHEA_BMASK_IBM(48, 63)57 58struct ehea_vsgentry {59 u64 vaddr;60 u32 l_key;61 u32 len;62};63 64/* maximum number of sg entries allowed in a WQE */65#define EHEA_MAX_WQE_SG_ENTRIES 25266#define SWQE2_MAX_IMM (0xD0 - 0x30)67#define SWQE3_MAX_IMM 22468 69/* tx control flags for swqe */70#define EHEA_SWQE_CRC 0x800071#define EHEA_SWQE_IP_CHECKSUM 0x400072#define EHEA_SWQE_TCP_CHECKSUM 0x200073#define EHEA_SWQE_TSO 0x100074#define EHEA_SWQE_SIGNALLED_COMPLETION 0x080075#define EHEA_SWQE_VLAN_INSERT 0x040076#define EHEA_SWQE_IMM_DATA_PRESENT 0x020077#define EHEA_SWQE_DESCRIPTORS_PRESENT 0x010078#define EHEA_SWQE_WRAP_CTL_REC 0x008079#define EHEA_SWQE_WRAP_CTL_FORCE 0x004080#define EHEA_SWQE_BIND 0x002081#define EHEA_SWQE_PURGE 0x001082 83/* sizeof(struct ehea_swqe) less the union */84#define SWQE_HEADER_SIZE 3285 86struct ehea_swqe {87 u64 wr_id;88 u16 tx_control;89 u16 vlan_tag;90 u8 reserved1;91 u8 ip_start;92 u8 ip_end;93 u8 immediate_data_length;94 u8 tcp_offset;95 u8 reserved2;96 u16 reserved2b;97 u8 wrap_tag;98 u8 descriptors; /* number of valid descriptors in WQE */99 u16 reserved3;100 u16 reserved4;101 u16 mss;102 u32 reserved5;103 union {104 /* Send WQE Format 1 */105 struct {106 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];107 } no_immediate_data;108 109 /* Send WQE Format 2 */110 struct {111 struct ehea_vsgentry sg_entry;112 /* 0x30 */113 u8 immediate_data[SWQE2_MAX_IMM];114 /* 0xd0 */115 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES-1];116 } immdata_desc __packed;117 118 /* Send WQE Format 3 */119 struct {120 u8 immediate_data[SWQE3_MAX_IMM];121 } immdata_nodesc;122 } u;123};124 125struct ehea_rwqe {126 u64 wr_id; /* work request ID */127 u8 reserved1[5];128 u8 data_segments;129 u16 reserved2;130 u64 reserved3;131 u64 reserved4;132 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];133};134 135#define EHEA_CQE_VLAN_TAG_XTRACT 0x0400136 137#define EHEA_CQE_TYPE_RQ 0x60138#define EHEA_CQE_STAT_ERR_MASK 0x700F139#define EHEA_CQE_STAT_FAT_ERR_MASK 0xF140#define EHEA_CQE_BLIND_CKSUM 0x8000141#define EHEA_CQE_STAT_ERR_TCP 0x4000142#define EHEA_CQE_STAT_ERR_IP 0x2000143#define EHEA_CQE_STAT_ERR_CRC 0x1000144 145/* Defines which bad send cqe stati lead to a port reset */146#define EHEA_CQE_STAT_RESET_MASK 0x0002147 148struct ehea_cqe {149 u64 wr_id; /* work request ID from WQE */150 u8 type;151 u8 valid;152 u16 status;153 u16 reserved1;154 u16 num_bytes_transfered;155 u16 vlan_tag;156 u16 inet_checksum_value;157 u8 reserved2;158 u8 header_length;159 u16 reserved3;160 u16 page_offset;161 u16 wqe_count;162 u32 qp_token;163 u32 timestamp;164 u32 reserved4;165 u64 reserved5[3];166};167 168#define EHEA_EQE_VALID EHEA_BMASK_IBM(0, 0)169#define EHEA_EQE_IS_CQE EHEA_BMASK_IBM(1, 1)170#define EHEA_EQE_IDENTIFIER EHEA_BMASK_IBM(2, 7)171#define EHEA_EQE_QP_CQ_NUMBER EHEA_BMASK_IBM(8, 31)172#define EHEA_EQE_QP_TOKEN EHEA_BMASK_IBM(32, 63)173#define EHEA_EQE_CQ_TOKEN EHEA_BMASK_IBM(32, 63)174#define EHEA_EQE_KEY EHEA_BMASK_IBM(32, 63)175#define EHEA_EQE_PORT_NUMBER EHEA_BMASK_IBM(56, 63)176#define EHEA_EQE_EQ_NUMBER EHEA_BMASK_IBM(48, 63)177#define EHEA_EQE_SM_ID EHEA_BMASK_IBM(48, 63)178#define EHEA_EQE_SM_MECH_NUMBER EHEA_BMASK_IBM(48, 55)179#define EHEA_EQE_SM_PORT_NUMBER EHEA_BMASK_IBM(56, 63)180 181#define EHEA_AER_RESTYPE_QP 0x8182#define EHEA_AER_RESTYPE_CQ 0x4183#define EHEA_AER_RESTYPE_EQ 0x3184 185/* Defines which affiliated errors lead to a port reset */186#define EHEA_AER_RESET_MASK 0xFFFFFFFFFEFFFFFFULL187#define EHEA_AERR_RESET_MASK 0xFFFFFFFFFFFFFFFFULL188 189struct ehea_eqe {190 u64 entry;191};192 193#define ERROR_DATA_LENGTH EHEA_BMASK_IBM(52, 63)194#define ERROR_DATA_TYPE EHEA_BMASK_IBM(0, 7)195 196static inline void *hw_qeit_calc(struct hw_queue *queue, u64 q_offset)197{198 struct ehea_page *current_page;199 200 if (q_offset >= queue->queue_length)201 q_offset -= queue->queue_length;202 current_page = (queue->queue_pages)[q_offset >> EHEA_PAGESHIFT];203 return ¤t_page->entries[q_offset & (EHEA_PAGESIZE - 1)];204}205 206static inline void *hw_qeit_get(struct hw_queue *queue)207{208 return hw_qeit_calc(queue, queue->current_q_offset);209}210 211static inline void hw_qeit_inc(struct hw_queue *queue)212{213 queue->current_q_offset += queue->qe_size;214 if (queue->current_q_offset >= queue->queue_length) {215 queue->current_q_offset = 0;216 /* toggle the valid flag */217 queue->toggle_state = (~queue->toggle_state) & 1;218 }219}220 221static inline void *hw_qeit_get_inc(struct hw_queue *queue)222{223 void *retvalue = hw_qeit_get(queue);224 hw_qeit_inc(queue);225 return retvalue;226}227 228static inline void *hw_qeit_get_inc_valid(struct hw_queue *queue)229{230 struct ehea_cqe *retvalue = hw_qeit_get(queue);231 u8 valid = retvalue->valid;232 void *pref;233 234 if ((valid >> 7) == (queue->toggle_state & 1)) {235 /* this is a good one */236 hw_qeit_inc(queue);237 pref = hw_qeit_calc(queue, queue->current_q_offset);238 prefetch(pref);239 prefetch(pref + 128);240 } else241 retvalue = NULL;242 return retvalue;243}244 245static inline void *hw_qeit_get_valid(struct hw_queue *queue)246{247 struct ehea_cqe *retvalue = hw_qeit_get(queue);248 void *pref;249 u8 valid;250 251 pref = hw_qeit_calc(queue, queue->current_q_offset);252 prefetch(pref);253 prefetch(pref + 128);254 prefetch(pref + 256);255 valid = retvalue->valid;256 if (!((valid >> 7) == (queue->toggle_state & 1)))257 retvalue = NULL;258 return retvalue;259}260 261static inline void *hw_qeit_reset(struct hw_queue *queue)262{263 queue->current_q_offset = 0;264 return hw_qeit_get(queue);265}266 267static inline void *hw_qeit_eq_get_inc(struct hw_queue *queue)268{269 u64 last_entry_in_q = queue->queue_length - queue->qe_size;270 void *retvalue;271 272 retvalue = hw_qeit_get(queue);273 queue->current_q_offset += queue->qe_size;274 if (queue->current_q_offset > last_entry_in_q) {275 queue->current_q_offset = 0;276 queue->toggle_state = (~queue->toggle_state) & 1;277 }278 return retvalue;279}280 281static inline void *hw_eqit_eq_get_inc_valid(struct hw_queue *queue)282{283 void *retvalue = hw_qeit_get(queue);284 u32 qe = *(u8 *)retvalue;285 if ((qe >> 7) == (queue->toggle_state & 1))286 hw_qeit_eq_get_inc(queue);287 else288 retvalue = NULL;289 return retvalue;290}291 292static inline struct ehea_rwqe *ehea_get_next_rwqe(struct ehea_qp *qp,293 int rq_nr)294{295 struct hw_queue *queue;296 297 if (rq_nr == 1)298 queue = &qp->hw_rqueue1;299 else if (rq_nr == 2)300 queue = &qp->hw_rqueue2;301 else302 queue = &qp->hw_rqueue3;303 304 return hw_qeit_get_inc(queue);305}306 307static inline struct ehea_swqe *ehea_get_swqe(struct ehea_qp *my_qp,308 int *wqe_index)309{310 struct hw_queue *queue = &my_qp->hw_squeue;311 struct ehea_swqe *wqe_p;312 313 *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_SQ);314 wqe_p = hw_qeit_get_inc(&my_qp->hw_squeue);315 316 return wqe_p;317}318 319static inline void ehea_post_swqe(struct ehea_qp *my_qp, struct ehea_swqe *swqe)320{321 iosync();322 ehea_update_sqa(my_qp, 1);323}324 325static inline struct ehea_cqe *ehea_poll_rq1(struct ehea_qp *qp, int *wqe_index)326{327 struct hw_queue *queue = &qp->hw_rqueue1;328 329 *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_RQ1);330 return hw_qeit_get_valid(queue);331}332 333static inline void ehea_inc_cq(struct ehea_cq *cq)334{335 hw_qeit_inc(&cq->hw_queue);336}337 338static inline void ehea_inc_rq1(struct ehea_qp *qp)339{340 hw_qeit_inc(&qp->hw_rqueue1);341}342 343static inline struct ehea_cqe *ehea_poll_cq(struct ehea_cq *my_cq)344{345 return hw_qeit_get_valid(&my_cq->hw_queue);346}347 348#define EHEA_CQ_REGISTER_ORIG 0349#define EHEA_EQ_REGISTER_ORIG 0350 351enum ehea_eq_type {352 EHEA_EQ = 0, /* event queue */353 EHEA_NEQ /* notification event queue */354};355 356struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,357 enum ehea_eq_type type,358 const u32 length, const u8 eqe_gen);359 360int ehea_destroy_eq(struct ehea_eq *eq);361 362struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq);363 364struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, int cqe,365 u64 eq_handle, u32 cq_token);366 367int ehea_destroy_cq(struct ehea_cq *cq);368 369struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter, u32 pd,370 struct ehea_qp_init_attr *init_attr);371 372int ehea_destroy_qp(struct ehea_qp *qp);373 374int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr);375 376int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,377 struct ehea_mr *shared_mr);378 379int ehea_rem_mr(struct ehea_mr *mr);380 381u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle,382 u64 *aer, u64 *aerr);383 384int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages);385int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages);386int ehea_create_busmap(void);387void ehea_destroy_busmap(void);388u64 ehea_map_vaddr(void *caddr);389 390#endif /* __EHEA_QMR_H__ */391