1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
2/*
3 * Copyright 2017 NXP
4 */
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/slab.h>
9
10#include "fman_keygen.h"
11
12/* Maximum number of HW Ports */
13#define FMAN_MAX_NUM_OF_HW_PORTS 64
14
15/* Maximum number of KeyGen Schemes */
16#define FM_KG_MAX_NUM_OF_SCHEMES 32
17
18/* Number of generic KeyGen Generic Extract Command Registers */
19#define FM_KG_NUM_OF_GENERIC_REGS 8
20
21/* Dummy port ID */
22#define DUMMY_PORT_ID 0
23
24/* Select Scheme Value Register */
25#define KG_SCH_DEF_USE_KGSE_DV_0 2
26#define KG_SCH_DEF_USE_KGSE_DV_1 3
27
28/* Registers Shifting values */
29#define FM_KG_KGAR_NUM_SHIFT 16
30#define KG_SCH_DEF_L4_PORT_SHIFT 8
31#define KG_SCH_DEF_IP_ADDR_SHIFT 18
32#define KG_SCH_HASH_CONFIG_SHIFT_SHIFT 24
33
34/* KeyGen Registers bit field masks: */
35
36/* Enable bit field mask for KeyGen General Configuration Register */
37#define FM_KG_KGGCR_EN 0x80000000
38
39/* KeyGen Global Registers bit field masks */
40#define FM_KG_KGAR_GO 0x80000000
41#define FM_KG_KGAR_READ 0x40000000
42#define FM_KG_KGAR_WRITE 0x00000000
43#define FM_KG_KGAR_SEL_SCHEME_ENTRY 0x00000000
44#define FM_KG_KGAR_SCM_WSEL_UPDATE_CNT 0x00008000
45
46#define FM_KG_KGAR_ERR 0x20000000
47#define FM_KG_KGAR_SEL_CLS_PLAN_ENTRY 0x01000000
48#define FM_KG_KGAR_SEL_PORT_ENTRY 0x02000000
49#define FM_KG_KGAR_SEL_PORT_WSEL_SP 0x00008000
50#define FM_KG_KGAR_SEL_PORT_WSEL_CPP 0x00004000
51
52/* Error events exceptions */
53#define FM_EX_KG_DOUBLE_ECC 0x80000000
54#define FM_EX_KG_KEYSIZE_OVERFLOW 0x40000000
55
56/* Scheme Registers bit field masks */
57#define KG_SCH_MODE_EN 0x80000000
58#define KG_SCH_VSP_NO_KSP_EN 0x80000000
59#define KG_SCH_HASH_CONFIG_SYM 0x40000000
60
61/* Known Protocol field codes */
62#define KG_SCH_KN_PORT_ID 0x80000000
63#define KG_SCH_KN_MACDST 0x40000000
64#define KG_SCH_KN_MACSRC 0x20000000
65#define KG_SCH_KN_TCI1 0x10000000
66#define KG_SCH_KN_TCI2 0x08000000
67#define KG_SCH_KN_ETYPE 0x04000000
68#define KG_SCH_KN_PPPSID 0x02000000
69#define KG_SCH_KN_PPPID 0x01000000
70#define KG_SCH_KN_MPLS1 0x00800000
71#define KG_SCH_KN_MPLS2 0x00400000
72#define KG_SCH_KN_MPLS_LAST 0x00200000
73#define KG_SCH_KN_IPSRC1 0x00100000
74#define KG_SCH_KN_IPDST1 0x00080000
75#define KG_SCH_KN_PTYPE1 0x00040000
76#define KG_SCH_KN_IPTOS_TC1 0x00020000
77#define KG_SCH_KN_IPV6FL1 0x00010000
78#define KG_SCH_KN_IPSRC2 0x00008000
79#define KG_SCH_KN_IPDST2 0x00004000
80#define KG_SCH_KN_PTYPE2 0x00002000
81#define KG_SCH_KN_IPTOS_TC2 0x00001000
82#define KG_SCH_KN_IPV6FL2 0x00000800
83#define KG_SCH_KN_GREPTYPE 0x00000400
84#define KG_SCH_KN_IPSEC_SPI 0x00000200
85#define KG_SCH_KN_IPSEC_NH 0x00000100
86#define KG_SCH_KN_IPPID 0x00000080
87#define KG_SCH_KN_L4PSRC 0x00000004
88#define KG_SCH_KN_L4PDST 0x00000002
89#define KG_SCH_KN_TFLG 0x00000001
90
91/* NIA values */
92#define NIA_ENG_BMI 0x00500000
93#define NIA_BMI_AC_ENQ_FRAME 0x00000002
94#define ENQUEUE_KG_DFLT_NIA (NIA_ENG_BMI | NIA_BMI_AC_ENQ_FRAME)
95
96/* Hard-coded configuration:
97 * These values are used as hard-coded values for KeyGen configuration
98 * and they replace user selections for this hard-coded version
99 */
100
101/* Hash distribution shift */
102#define DEFAULT_HASH_DIST_FQID_SHIFT 0
103
104/* Hash shift */
105#define DEFAULT_HASH_SHIFT 0
106
107/* Symmetric hash usage:
108 * Warning:
109 * - the value for symmetric hash usage must be in accordance with hash
110 * key defined below
111 * - according to tests performed, spreading is not working if symmetric
112 * hash is set on true
113 * So ultimately symmetric hash functionality should be always disabled:
114 */
115#define DEFAULT_SYMMETRIC_HASH false
116
117/* Hash Key extraction fields: */
118#define DEFAULT_HASH_KEY_EXTRACT_FIELDS \
119 (KG_SCH_KN_IPSRC1 | KG_SCH_KN_IPDST1 | \
120 KG_SCH_KN_L4PSRC | KG_SCH_KN_L4PDST | \
121 KG_SCH_KN_IPSEC_SPI)
122
123/* Default values to be used as hash key in case IPv4 or L4 (TCP, UDP)
124 * don't exist in the frame
125 */
126/* Default IPv4 address */
127#define DEFAULT_HASH_KEY_IPv4_ADDR 0x0A0A0A0A
128/* Default L4 port */
129#define DEFAULT_HASH_KEY_L4_PORT 0x0B0B0B0B
130
131/* KeyGen Memory Mapped Registers: */
132
133/* Scheme Configuration RAM Registers */
134struct fman_kg_scheme_regs {
135 u32 kgse_mode; /* 0x100: MODE */
136 u32 kgse_ekfc; /* 0x104: Extract Known Fields Command */
137 u32 kgse_ekdv; /* 0x108: Extract Known Default Value */
138 u32 kgse_bmch; /* 0x10C: Bit Mask Command High */
139 u32 kgse_bmcl; /* 0x110: Bit Mask Command Low */
140 u32 kgse_fqb; /* 0x114: Frame Queue Base */
141 u32 kgse_hc; /* 0x118: Hash Command */
142 u32 kgse_ppc; /* 0x11C: Policer Profile Command */
143 u32 kgse_gec[FM_KG_NUM_OF_GENERIC_REGS];
144 /* 0x120: Generic Extract Command */
145 u32 kgse_spc;
146 /* 0x140: KeyGen Scheme Entry Statistic Packet Counter */
147 u32 kgse_dv0; /* 0x144: KeyGen Scheme Entry Default Value 0 */
148 u32 kgse_dv1; /* 0x148: KeyGen Scheme Entry Default Value 1 */
149 u32 kgse_ccbs;
150 /* 0x14C: KeyGen Scheme Entry Coarse Classification Bit*/
151 u32 kgse_mv; /* 0x150: KeyGen Scheme Entry Match vector */
152 u32 kgse_om; /* 0x154: KeyGen Scheme Entry Operation Mode bits */
153 u32 kgse_vsp;
154 /* 0x158: KeyGen Scheme Entry Virtual Storage Profile */
155};
156
157/* Port Partition Configuration Registers */
158struct fman_kg_pe_regs {
159 u32 fmkg_pe_sp; /* 0x100: KeyGen Port entry Scheme Partition */
160 u32 fmkg_pe_cpp;
161 /* 0x104: KeyGen Port Entry Classification Plan Partition */
162};
163
164/* General Configuration and Status Registers
165 * Global Statistic Counters
166 * KeyGen Global Registers
167 */
168struct fman_kg_regs {
169 u32 fmkg_gcr; /* 0x000: KeyGen General Configuration Register */
170 u32 res004; /* 0x004: Reserved */
171 u32 res008; /* 0x008: Reserved */
172 u32 fmkg_eer; /* 0x00C: KeyGen Error Event Register */
173 u32 fmkg_eeer; /* 0x010: KeyGen Error Event Enable Register */
174 u32 res014; /* 0x014: Reserved */
175 u32 res018; /* 0x018: Reserved */
176 u32 fmkg_seer; /* 0x01C: KeyGen Scheme Error Event Register */
177 u32 fmkg_seeer; /* 0x020: KeyGen Scheme Error Event Enable Register */
178 u32 fmkg_gsr; /* 0x024: KeyGen Global Status Register */
179 u32 fmkg_tpc; /* 0x028: Total Packet Counter Register */
180 u32 fmkg_serc; /* 0x02C: Soft Error Capture Register */
181 u32 res030[4]; /* 0x030: Reserved */
182 u32 fmkg_fdor; /* 0x034: Frame Data Offset Register */
183 u32 fmkg_gdv0r; /* 0x038: Global Default Value Register 0 */
184 u32 fmkg_gdv1r; /* 0x03C: Global Default Value Register 1 */
185 u32 res04c[6]; /* 0x040: Reserved */
186 u32 fmkg_feer; /* 0x044: Force Error Event Register */
187 u32 res068[38]; /* 0x048: Reserved */
188 union {
189 u32 fmkg_indirect[63]; /* 0x100: Indirect Access Registers */
190 struct fman_kg_scheme_regs fmkg_sch; /* Scheme Registers */
191 struct fman_kg_pe_regs fmkg_pe; /* Port Partition Registers */
192 };
193 u32 fmkg_ar; /* 0x1FC: KeyGen Action Register */
194};
195
196/* KeyGen Scheme data */
197struct keygen_scheme {
198 bool used; /* Specifies if this scheme is used */
199 u8 hw_port_id;
200 /* Hardware port ID
201 * schemes sharing between multiple ports is not
202 * currently supported
203 * so we have only one port id bound to a scheme
204 */
205 u32 base_fqid;
206 /* Base FQID:
207 * Must be between 1 and 2^24-1
208 * If hash is used and an even distribution is
209 * expected according to hash_fqid_count,
210 * base_fqid must be aligned to hash_fqid_count
211 */
212 u32 hash_fqid_count;
213 /* FQ range for hash distribution:
214 * Must be a power of 2
215 * Represents the range of queues for spreading
216 */
217 bool use_hashing; /* Usage of Hashing and spreading over FQ */
218 bool symmetric_hash; /* Symmetric Hash option usage */
219 u8 hashShift;
220 /* Hash result right shift.
221 * Select the 24 bits out of the 64 hash result.
222 * 0 means using the 24 LSB's, otherwise
223 * use the 24 LSB's after shifting right
224 */
225 u32 match_vector; /* Match Vector */
226};
227
228/* KeyGen driver data */
229struct fman_keygen {
230 struct keygen_scheme schemes[FM_KG_MAX_NUM_OF_SCHEMES];
231 /* Array of schemes */
232 struct fman_kg_regs __iomem *keygen_regs; /* KeyGen registers */
233};
234
235/* keygen_write_ar_wait
236 *
237 * Write Action Register with specified value, wait for GO bit field to be
238 * idle and then read the error
239 *
240 * regs: KeyGen registers
241 * fmkg_ar: Action Register value
242 *
243 * Return: Zero for success or error code in case of failure
244 */
245static int keygen_write_ar_wait(struct fman_kg_regs __iomem *regs, u32 fmkg_ar)
246{
247 iowrite32be(fmkg_ar, &regs->fmkg_ar);
248
249 /* Wait for GO bit field to be idle */
250 while (fmkg_ar & FM_KG_KGAR_GO)
251 fmkg_ar = ioread32be(&regs->fmkg_ar);
252
253 if (fmkg_ar & FM_KG_KGAR_ERR)
254 return -EINVAL;
255
256 return 0;
257}
258
259/* build_ar_scheme
260 *
261 * Build Action Register value for scheme settings
262 *
263 * scheme_id: Scheme ID
264 * update_counter: update scheme counter
265 * write: true for action to write the scheme or false for read action
266 *
267 * Return: AR value
268 */
269static u32 build_ar_scheme(u8 scheme_id, bool update_counter, bool write)
270{
271 u32 rw = (u32)(write ? FM_KG_KGAR_WRITE : FM_KG_KGAR_READ);
272
273 return (u32)(FM_KG_KGAR_GO |
274 rw |
275 FM_KG_KGAR_SEL_SCHEME_ENTRY |
276 DUMMY_PORT_ID |
277 ((u32)scheme_id << FM_KG_KGAR_NUM_SHIFT) |
278 (update_counter ? FM_KG_KGAR_SCM_WSEL_UPDATE_CNT : 0));
279}
280
281/* build_ar_bind_scheme
282 *
283 * Build Action Register value for port binding to schemes
284 *
285 * hwport_id: HW Port ID
286 * write: true for action to write the bind or false for read action
287 *
288 * Return: AR value
289 */
290static u32 build_ar_bind_scheme(u8 hwport_id, bool write)
291{
292 u32 rw = write ? (u32)FM_KG_KGAR_WRITE : (u32)FM_KG_KGAR_READ;
293
294 return (u32)(FM_KG_KGAR_GO |
295 rw |
296 FM_KG_KGAR_SEL_PORT_ENTRY |
297 hwport_id |
298 FM_KG_KGAR_SEL_PORT_WSEL_SP);
299}
300
301/* keygen_write_sp
302 *
303 * Write Scheme Partition Register with specified value
304 *
305 * regs: KeyGen Registers
306 * sp: Scheme Partition register value
307 * add: true to add a scheme partition or false to clear
308 *
309 * Return: none
310 */
311static void keygen_write_sp(struct fman_kg_regs __iomem *regs, u32 sp, bool add)
312{
313 u32 tmp;
314
315 tmp = ioread32be(&regs->fmkg_pe.fmkg_pe_sp);
316
317 if (add)
318 tmp |= sp;
319 else
320 tmp &= ~sp;
321
322 iowrite32be(tmp, &regs->fmkg_pe.fmkg_pe_sp);
323}
324
325/* build_ar_bind_cls_plan
326 *
327 * Build Action Register value for Classification Plan
328 *
329 * hwport_id: HW Port ID
330 * write: true for action to write the CP or false for read action
331 *
332 * Return: AR value
333 */
334static u32 build_ar_bind_cls_plan(u8 hwport_id, bool write)
335{
336 u32 rw = write ? (u32)FM_KG_KGAR_WRITE : (u32)FM_KG_KGAR_READ;
337
338 return (u32)(FM_KG_KGAR_GO |
339 rw |
340 FM_KG_KGAR_SEL_PORT_ENTRY |
341 hwport_id |
342 FM_KG_KGAR_SEL_PORT_WSEL_CPP);
343}
344
345/* keygen_write_cpp
346 *
347 * Write Classification Plan Partition Register with specified value
348 *
349 * regs: KeyGen Registers
350 * cpp: CPP register value
351 *
352 * Return: none
353 */
354static void keygen_write_cpp(struct fman_kg_regs __iomem *regs, u32 cpp)
355{
356 iowrite32be(cpp, &regs->fmkg_pe.fmkg_pe_cpp);
357}
358
359/* keygen_write_scheme
360 *
361 * Write all Schemes Registers with specified values
362 *
363 * regs: KeyGen Registers
364 * scheme_id: Scheme ID
365 * scheme_regs: Scheme registers values desired to be written
366 * update_counter: update scheme counter
367 *
368 * Return: Zero for success or error code in case of failure
369 */
370static int keygen_write_scheme(struct fman_kg_regs __iomem *regs, u8 scheme_id,
371 struct fman_kg_scheme_regs *scheme_regs,
372 bool update_counter)
373{
374 u32 ar_reg;
375 int err, i;
376
377 /* Write indirect scheme registers */
378 iowrite32be(scheme_regs->kgse_mode, &regs->fmkg_sch.kgse_mode);
379 iowrite32be(scheme_regs->kgse_ekfc, &regs->fmkg_sch.kgse_ekfc);
380 iowrite32be(scheme_regs->kgse_ekdv, &regs->fmkg_sch.kgse_ekdv);
381 iowrite32be(scheme_regs->kgse_bmch, &regs->fmkg_sch.kgse_bmch);
382 iowrite32be(scheme_regs->kgse_bmcl, &regs->fmkg_sch.kgse_bmcl);
383 iowrite32be(scheme_regs->kgse_fqb, &regs->fmkg_sch.kgse_fqb);
384 iowrite32be(scheme_regs->kgse_hc, &regs->fmkg_sch.kgse_hc);
385 iowrite32be(scheme_regs->kgse_ppc, &regs->fmkg_sch.kgse_ppc);
386 iowrite32be(scheme_regs->kgse_spc, &regs->fmkg_sch.kgse_spc);
387 iowrite32be(scheme_regs->kgse_dv0, &regs->fmkg_sch.kgse_dv0);
388 iowrite32be(scheme_regs->kgse_dv1, &regs->fmkg_sch.kgse_dv1);
389 iowrite32be(scheme_regs->kgse_ccbs, &regs->fmkg_sch.kgse_ccbs);
390 iowrite32be(scheme_regs->kgse_mv, &regs->fmkg_sch.kgse_mv);
391 iowrite32be(scheme_regs->kgse_om, &regs->fmkg_sch.kgse_om);
392 iowrite32be(scheme_regs->kgse_vsp, &regs->fmkg_sch.kgse_vsp);
393
394 for (i = 0 ; i < FM_KG_NUM_OF_GENERIC_REGS ; i++)
395 iowrite32be(scheme_regs->kgse_gec[i],
396 &regs->fmkg_sch.kgse_gec[i]);
397
398 /* Write AR (Action register) */
399 ar_reg = build_ar_scheme(scheme_id, update_counter, write: true);
400 err = keygen_write_ar_wait(regs, fmkg_ar: ar_reg);
401 if (err != 0) {
402 pr_err("Writing Action Register failed\n");
403 return err;
404 }
405
406 return err;
407}
408
409/* get_free_scheme_id
410 *
411 * Find the first free scheme available to be used
412 *
413 * keygen: KeyGen handle
414 * scheme_id: pointer to scheme id
415 *
416 * Return: 0 on success, -EINVAL when the are no available free schemes
417 */
418static int get_free_scheme_id(struct fman_keygen *keygen, u8 *scheme_id)
419{
420 u8 i;
421
422 for (i = 0; i < FM_KG_MAX_NUM_OF_SCHEMES; i++)
423 if (!keygen->schemes[i].used) {
424 *scheme_id = i;
425 return 0;
426 }
427
428 return -EINVAL;
429}
430
431/* get_scheme
432 *
433 * Provides the scheme for specified ID
434 *
435 * keygen: KeyGen handle
436 * scheme_id: Scheme ID
437 *
438 * Return: handle to required scheme
439 */
440static struct keygen_scheme *get_scheme(struct fman_keygen *keygen,
441 u8 scheme_id)
442{
443 if (scheme_id >= FM_KG_MAX_NUM_OF_SCHEMES)
444 return NULL;
445 return &keygen->schemes[scheme_id];
446}
447
448/* keygen_bind_port_to_schemes
449 *
450 * Bind the port to schemes
451 *
452 * keygen: KeyGen handle
453 * scheme_id: id of the scheme to bind to
454 * bind: true to bind the port or false to unbind it
455 *
456 * Return: Zero for success or error code in case of failure
457 */
458static int keygen_bind_port_to_schemes(struct fman_keygen *keygen,
459 u8 scheme_id,
460 bool bind)
461{
462 struct fman_kg_regs __iomem *keygen_regs = keygen->keygen_regs;
463 struct keygen_scheme *scheme;
464 u32 ar_reg;
465 u32 schemes_vector = 0;
466 int err;
467
468 scheme = get_scheme(keygen, scheme_id);
469 if (!scheme) {
470 pr_err("Requested Scheme does not exist\n");
471 return -EINVAL;
472 }
473 if (!scheme->used) {
474 pr_err("Cannot bind port to an invalid scheme\n");
475 return -EINVAL;
476 }
477
478 schemes_vector |= 1 << (31 - scheme_id);
479
480 ar_reg = build_ar_bind_scheme(hwport_id: scheme->hw_port_id, write: false);
481 err = keygen_write_ar_wait(regs: keygen_regs, fmkg_ar: ar_reg);
482 if (err != 0) {
483 pr_err("Reading Action Register failed\n");
484 return err;
485 }
486
487 keygen_write_sp(regs: keygen_regs, sp: schemes_vector, add: bind);
488
489 ar_reg = build_ar_bind_scheme(hwport_id: scheme->hw_port_id, write: true);
490 err = keygen_write_ar_wait(regs: keygen_regs, fmkg_ar: ar_reg);
491 if (err != 0) {
492 pr_err("Writing Action Register failed\n");
493 return err;
494 }
495
496 return 0;
497}
498
499/* keygen_scheme_setup
500 *
501 * Setup the scheme according to required configuration
502 *
503 * keygen: KeyGen handle
504 * scheme_id: scheme ID
505 * enable: true to enable scheme or false to disable it
506 *
507 * Return: Zero for success or error code in case of failure
508 */
509static int keygen_scheme_setup(struct fman_keygen *keygen, u8 scheme_id,
510 bool enable)
511{
512 struct fman_kg_regs __iomem *keygen_regs = keygen->keygen_regs;
513 struct fman_kg_scheme_regs scheme_regs;
514 struct keygen_scheme *scheme;
515 u32 tmp_reg;
516 int err;
517
518 scheme = get_scheme(keygen, scheme_id);
519 if (!scheme) {
520 pr_err("Requested Scheme does not exist\n");
521 return -EINVAL;
522 }
523 if (enable && scheme->used) {
524 pr_err("The requested Scheme is already used\n");
525 return -EINVAL;
526 }
527
528 /* Clear scheme registers */
529 memset(&scheme_regs, 0, sizeof(struct fman_kg_scheme_regs));
530
531 /* Setup all scheme registers: */
532 tmp_reg = 0;
533
534 if (enable) {
535 /* Enable Scheme */
536 tmp_reg |= KG_SCH_MODE_EN;
537 /* Enqueue frame NIA */
538 tmp_reg |= ENQUEUE_KG_DFLT_NIA;
539 }
540
541 scheme_regs.kgse_mode = tmp_reg;
542
543 scheme_regs.kgse_mv = scheme->match_vector;
544
545 /* Scheme don't override StorageProfile:
546 * valid only for DPAA_VERSION >= 11
547 */
548 scheme_regs.kgse_vsp = KG_SCH_VSP_NO_KSP_EN;
549
550 /* Configure Hard-Coded Rx Hashing: */
551
552 if (scheme->use_hashing) {
553 /* configure kgse_ekfc */
554 scheme_regs.kgse_ekfc = DEFAULT_HASH_KEY_EXTRACT_FIELDS;
555
556 /* configure kgse_ekdv */
557 tmp_reg = 0;
558 tmp_reg |= (KG_SCH_DEF_USE_KGSE_DV_0 <<
559 KG_SCH_DEF_IP_ADDR_SHIFT);
560 tmp_reg |= (KG_SCH_DEF_USE_KGSE_DV_1 <<
561 KG_SCH_DEF_L4_PORT_SHIFT);
562 scheme_regs.kgse_ekdv = tmp_reg;
563
564 /* configure kgse_dv0 */
565 scheme_regs.kgse_dv0 = DEFAULT_HASH_KEY_IPv4_ADDR;
566 /* configure kgse_dv1 */
567 scheme_regs.kgse_dv1 = DEFAULT_HASH_KEY_L4_PORT;
568
569 /* configure kgse_hc */
570 tmp_reg = 0;
571 tmp_reg |= ((scheme->hash_fqid_count - 1) <<
572 DEFAULT_HASH_DIST_FQID_SHIFT);
573 tmp_reg |= scheme->hashShift << KG_SCH_HASH_CONFIG_SHIFT_SHIFT;
574
575 if (scheme->symmetric_hash) {
576 /* Normally extraction key should be verified if
577 * complies with symmetric hash
578 * But because extraction is hard-coded, we are sure
579 * the key is symmetric
580 */
581 tmp_reg |= KG_SCH_HASH_CONFIG_SYM;
582 }
583 scheme_regs.kgse_hc = tmp_reg;
584 } else {
585 scheme_regs.kgse_ekfc = 0;
586 scheme_regs.kgse_hc = 0;
587 scheme_regs.kgse_ekdv = 0;
588 scheme_regs.kgse_dv0 = 0;
589 scheme_regs.kgse_dv1 = 0;
590 }
591
592 /* configure kgse_fqb: Scheme FQID base */
593 tmp_reg = 0;
594 tmp_reg |= scheme->base_fqid;
595 scheme_regs.kgse_fqb = tmp_reg;
596
597 /* features not used by hard-coded configuration */
598 scheme_regs.kgse_bmch = 0;
599 scheme_regs.kgse_bmcl = 0;
600 scheme_regs.kgse_spc = 0;
601
602 /* Write scheme registers */
603 err = keygen_write_scheme(regs: keygen_regs, scheme_id, scheme_regs: &scheme_regs, update_counter: true);
604 if (err != 0) {
605 pr_err("Writing scheme registers failed\n");
606 return err;
607 }
608
609 /* Update used field for Scheme */
610 scheme->used = enable;
611
612 return 0;
613}
614
615/* keygen_init
616 *
617 * KeyGen initialization:
618 * Initializes and enables KeyGen, allocate driver memory, setup registers,
619 * clear port bindings, invalidate all schemes
620 *
621 * keygen_regs: KeyGen registers base address
622 *
623 * Return: Handle to KeyGen driver
624 */
625struct fman_keygen *keygen_init(struct fman_kg_regs __iomem *keygen_regs)
626{
627 struct fman_keygen *keygen;
628 u32 ar;
629 int i;
630
631 /* Allocate memory for KeyGen driver */
632 keygen = kzalloc(size: sizeof(*keygen), GFP_KERNEL);
633 if (!keygen)
634 return NULL;
635
636 keygen->keygen_regs = keygen_regs;
637
638 /* KeyGen initialization (for Master partition):
639 * Setup KeyGen registers
640 */
641 iowrite32be(ENQUEUE_KG_DFLT_NIA, &keygen_regs->fmkg_gcr);
642
643 iowrite32be(FM_EX_KG_DOUBLE_ECC | FM_EX_KG_KEYSIZE_OVERFLOW,
644 &keygen_regs->fmkg_eer);
645
646 iowrite32be(0, &keygen_regs->fmkg_fdor);
647 iowrite32be(0, &keygen_regs->fmkg_gdv0r);
648 iowrite32be(0, &keygen_regs->fmkg_gdv1r);
649
650 /* Clear binding between ports to schemes and classification plans
651 * so that all ports are not bound to any scheme/classification plan
652 */
653 for (i = 0; i < FMAN_MAX_NUM_OF_HW_PORTS; i++) {
654 /* Clear all pe sp schemes registers */
655 keygen_write_sp(regs: keygen_regs, sp: 0xffffffff, add: false);
656 ar = build_ar_bind_scheme(hwport_id: i, write: true);
657 keygen_write_ar_wait(regs: keygen_regs, fmkg_ar: ar);
658
659 /* Clear all pe cpp classification plans registers */
660 keygen_write_cpp(regs: keygen_regs, cpp: 0);
661 ar = build_ar_bind_cls_plan(hwport_id: i, write: true);
662 keygen_write_ar_wait(regs: keygen_regs, fmkg_ar: ar);
663 }
664
665 /* Enable all scheme interrupts */
666 iowrite32be(0xFFFFFFFF, &keygen_regs->fmkg_seer);
667 iowrite32be(0xFFFFFFFF, &keygen_regs->fmkg_seeer);
668
669 /* Enable KyeGen */
670 iowrite32be(ioread32be(&keygen_regs->fmkg_gcr) | FM_KG_KGGCR_EN,
671 &keygen_regs->fmkg_gcr);
672
673 return keygen;
674}
675EXPORT_SYMBOL(keygen_init);
676
677/* keygen_port_hashing_init
678 *
679 * Initializes a port for Rx Hashing with specified configuration parameters
680 *
681 * keygen: KeyGen handle
682 * hw_port_id: HW Port ID
683 * hash_base_fqid: Hashing Base FQID used for spreading
684 * hash_size: Hashing size
685 *
686 * Return: Zero for success or error code in case of failure
687 */
688int keygen_port_hashing_init(struct fman_keygen *keygen, u8 hw_port_id,
689 u32 hash_base_fqid, u32 hash_size)
690{
691 struct keygen_scheme *scheme;
692 u8 scheme_id;
693 int err;
694
695 /* Validate Scheme configuration parameters */
696 if (hash_base_fqid == 0 || (hash_base_fqid & ~0x00FFFFFF)) {
697 pr_err("Base FQID must be between 1 and 2^24-1\n");
698 return -EINVAL;
699 }
700 if (hash_size == 0 || (hash_size & (hash_size - 1)) != 0) {
701 pr_err("Hash size must be power of two\n");
702 return -EINVAL;
703 }
704
705 /* Find a free scheme */
706 err = get_free_scheme_id(keygen, scheme_id: &scheme_id);
707 if (err) {
708 pr_err("The maximum number of available Schemes has been exceeded\n");
709 return -EINVAL;
710 }
711
712 /* Create and configure Hard-Coded Scheme: */
713
714 scheme = get_scheme(keygen, scheme_id);
715 if (!scheme) {
716 pr_err("Requested Scheme does not exist\n");
717 return -EINVAL;
718 }
719 if (scheme->used) {
720 pr_err("The requested Scheme is already used\n");
721 return -EINVAL;
722 }
723
724 /* Clear all scheme fields because the scheme may have been
725 * previously used
726 */
727 memset(scheme, 0, sizeof(struct keygen_scheme));
728
729 /* Setup scheme: */
730 scheme->hw_port_id = hw_port_id;
731 scheme->use_hashing = true;
732 scheme->base_fqid = hash_base_fqid;
733 scheme->hash_fqid_count = hash_size;
734 scheme->symmetric_hash = DEFAULT_SYMMETRIC_HASH;
735 scheme->hashShift = DEFAULT_HASH_SHIFT;
736
737 /* All Schemes in hard-coded configuration
738 * are Indirect Schemes
739 */
740 scheme->match_vector = 0;
741
742 err = keygen_scheme_setup(keygen, scheme_id, enable: true);
743 if (err != 0) {
744 pr_err("Scheme setup failed\n");
745 return err;
746 }
747
748 /* Bind Rx port to Scheme */
749 err = keygen_bind_port_to_schemes(keygen, scheme_id, bind: true);
750 if (err != 0) {
751 pr_err("Binding port to schemes failed\n");
752 return err;
753 }
754
755 return 0;
756}
757EXPORT_SYMBOL(keygen_port_hashing_init);
758

source code of linux/drivers/net/ethernet/freescale/fman/fman_keygen.c