1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) Marvell International Ltd. and its affiliates
16 static u32 ui_xor_regs_ctrl_backup;
17 static u32 ui_xor_regs_base_backup[MAX_CS_NUM + 1];
18 static u32 ui_xor_regs_mask_backup[MAX_CS_NUM + 1];
20 void mv_sys_xor_init(u32 num_of_cs, u32 cs_ena, uint64_t cs_size, u32 base_delta)
22 u32 reg, ui, cs_count;
23 uint64_t base, size_mask;
25 ui_xor_regs_ctrl_backup = reg_read(XOR_WINDOW_CTRL_REG(0, 0));
26 for (ui = 0; ui < MAX_CS_NUM + 1; ui++)
27 ui_xor_regs_base_backup[ui] =
28 reg_read(XOR_BASE_ADDR_REG(0, ui));
29 for (ui = 0; ui < MAX_CS_NUM + 1; ui++)
30 ui_xor_regs_mask_backup[ui] =
31 reg_read(XOR_SIZE_MASK_REG(0, ui));
34 for (ui = 0, cs_count = 0;
35 (cs_count < num_of_cs) && (ui < 8);
37 if (cs_ena & (1 << ui)) {
38 /* Enable Window x for each CS */
40 /* Enable Window x for each CS */
41 reg |= (0x3 << ((ui * 2) + 16));
45 reg_write(XOR_WINDOW_CTRL_REG(0, 0), reg);
48 for (ui = 0, cs_count = 0;
49 (cs_count < num_of_cs) && (ui < 8);
51 if (cs_ena & (1 << ui)) {
53 * window x - Base - 0x00000000,
54 * Attribute 0x0e - DRAM
56 base = cs_size * ui + base_delta;
57 /* fixed size 2GB for each CS */
58 size_mask = 0x7FFF0000;
74 /* configure as shared transaction */
80 reg_write(XOR_BASE_ADDR_REG(0, ui), (u32)base);
81 size_mask = (cs_size / _64K) - 1;
82 size_mask = (size_mask << XESMRX_SIZE_MASK_OFFS) & XESMRX_SIZE_MASK_MASK;
84 reg_write(XOR_SIZE_MASK_REG(0, ui), (u32)size_mask);
93 void mv_sys_xor_finish(void)
97 reg_write(XOR_WINDOW_CTRL_REG(0, 0), ui_xor_regs_ctrl_backup);
98 for (ui = 0; ui < MAX_CS_NUM + 1; ui++)
99 reg_write(XOR_BASE_ADDR_REG(0, ui),
100 ui_xor_regs_base_backup[ui]);
101 for (ui = 0; ui < MAX_CS_NUM + 1; ui++)
102 reg_write(XOR_SIZE_MASK_REG(0, ui),
103 ui_xor_regs_mask_backup[ui]);
105 reg_write(XOR_ADDR_OVRD_REG(0, 0), 0);
109 * mv_xor_hal_init - Initialize XOR engine
112 * This function initialize XOR unit.
120 * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
122 void mv_xor_hal_init(u32 xor_chan_num)
126 /* Abort any XOR activity & set default configuration */
127 for (i = 0; i < xor_chan_num; i++) {
128 mv_xor_command_set(i, MV_STOP);
129 mv_xor_ctrl_set(i, (1 << XEXCR_REG_ACC_PROTECT_OFFS) |
130 (4 << XEXCR_DST_BURST_LIMIT_OFFS) |
131 (4 << XEXCR_SRC_BURST_LIMIT_OFFS));
136 * mv_xor_ctrl_set - Set XOR channel control registers
146 * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
148 * This function does not modify the Operation_mode field of control register.
150 int mv_xor_ctrl_set(u32 chan, u32 xor_ctrl)
154 /* update the XOR Engine [0..1] Configuration Registers (XEx_c_r) */
155 old_value = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan))) &
156 XEXCR_OPERATION_MODE_MASK;
157 xor_ctrl &= ~XEXCR_OPERATION_MODE_MASK;
158 xor_ctrl |= old_value;
159 reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), xor_ctrl);
164 int mv_xor_mem_init(u32 chan, u32 start_ptr, unsigned long long block_size,
165 u32 init_val_high, u32 init_val_low)
169 if (block_size == _4G)
172 /* Parameter checking */
173 if (chan >= MV_XOR_MAX_CHAN)
176 if (MV_ACTIVE == mv_xor_state_get(chan))
179 if ((block_size < XEXBSR_BLOCK_SIZE_MIN_VALUE) ||
180 (block_size > XEXBSR_BLOCK_SIZE_MAX_VALUE))
183 /* set the operation mode to Memory Init */
184 temp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
185 temp &= ~XEXCR_OPERATION_MODE_MASK;
186 temp |= XEXCR_OPERATION_MODE_MEM_INIT;
187 reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), temp);
190 * update the start_ptr field in XOR Engine [0..1] Destination Pointer
193 reg_write(XOR_DST_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)), start_ptr);
196 * update the Block_size field in the XOR Engine[0..1] Block Size
199 reg_write(XOR_BLOCK_SIZE_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
203 * update the field Init_val_l in the XOR Engine Initial Value Register
206 reg_write(XOR_INIT_VAL_LOW_REG(XOR_UNIT(chan)), init_val_low);
209 * update the field Init_val_h in the XOR Engine Initial Value Register
212 reg_write(XOR_INIT_VAL_HIGH_REG(XOR_UNIT(chan)), init_val_high);
215 reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
216 XEXACTR_XESTART_MASK);
222 * mv_xor_state_get - Get XOR channel state.
225 * XOR channel activity state can be active, idle, paused.
226 * This function retrunes the channel activity state.
229 * chan - the channel number
235 * XOR_CHANNEL_IDLE - If the engine is idle.
236 * XOR_CHANNEL_ACTIVE - If the engine is busy.
237 * XOR_CHANNEL_PAUSED - If the engine is paused.
238 * MV_UNDEFINED_STATE - If the engine state is undefind or there is no
241 enum mv_state mv_xor_state_get(u32 chan)
245 /* Parameter checking */
246 if (chan >= MV_XOR_MAX_CHAN) {
247 DB(printf("%s: ERR. Invalid chan num %d\n", __func__, chan));
248 return MV_UNDEFINED_STATE;
251 /* read the current state */
252 state = reg_read(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
253 state &= XEXACTR_XESTATUS_MASK;
255 /* return the state */
257 case XEXACTR_XESTATUS_IDLE:
259 case XEXACTR_XESTATUS_ACTIVE:
261 case XEXACTR_XESTATUS_PAUSED:
265 return MV_UNDEFINED_STATE;
269 * mv_xor_command_set - Set command of XOR channel
272 * XOR channel can be started, idle, paused and restarted.
273 * Paused can be set only if channel is active.
274 * Start can be set only if channel is idle or paused.
275 * Restart can be set only if channel is paused.
276 * Stop can be set only if channel is active.
279 * chan - The channel number
280 * command - The command type (start, stop, restart, pause)
286 * MV_OK on success , MV_BAD_PARAM on erroneous parameter, MV_ERROR on
287 * undefind XOR engine mode
289 int mv_xor_command_set(u32 chan, enum mv_command command)
293 /* Parameter checking */
294 if (chan >= MV_XOR_MAX_CHAN) {
295 DB(printf("%s: ERR. Invalid chan num %d\n", __func__, chan));
299 /* get the current state */
300 state = mv_xor_state_get(chan);
302 if ((command == MV_START) && (state == MV_IDLE)) {
303 /* command is start and current state is idle */
304 reg_bit_set(XOR_ACTIVATION_REG
305 (XOR_UNIT(chan), XOR_CHAN(chan)),
306 XEXACTR_XESTART_MASK);
308 } else if ((command == MV_STOP) && (state == MV_ACTIVE)) {
309 /* command is stop and current state is active */
310 reg_bit_set(XOR_ACTIVATION_REG
311 (XOR_UNIT(chan), XOR_CHAN(chan)),
312 XEXACTR_XESTOP_MASK);
314 } else if (((enum mv_state)command == MV_PAUSED) &&
315 (state == MV_ACTIVE)) {
316 /* command is paused and current state is active */
317 reg_bit_set(XOR_ACTIVATION_REG
318 (XOR_UNIT(chan), XOR_CHAN(chan)),
319 XEXACTR_XEPAUSE_MASK);
321 } else if ((command == MV_RESTART) && (state == MV_PAUSED)) {
322 /* command is restart and current state is paused */
323 reg_bit_set(XOR_ACTIVATION_REG
324 (XOR_UNIT(chan), XOR_CHAN(chan)),
325 XEXACTR_XERESTART_MASK);
327 } else if ((command == MV_STOP) && (state == MV_IDLE)) {
328 /* command is stop and current state is active */
332 /* illegal command */
333 DB(printf("%s: ERR. Illegal command\n", __func__));
338 void ddr3_new_tip_ecc_scrub(void)
343 uint64_t total_mem_size, cs_mem_size = 0;
345 printf("DDR Training Sequence - Start scrubbing\n");
346 max_cs = ddr3_tip_max_cs_get(dev_num);
347 for (cs_c = 0; cs_c < max_cs; cs_c++)
350 mv_sys_xor_init(max_cs, cs_ena, cs_mem_size, 0);
351 total_mem_size = max_cs * cs_mem_size;
352 mv_xor_mem_init(0, 0, total_mem_size, 0xdeadbeef, 0xdeadbeef);
353 /* wait for previous transfer completion */
354 while (mv_xor_state_get(0) != MV_IDLE)
356 /* Return XOR State */
359 printf("DDR3 Training Sequence - End scrubbing\n");
363 * mv_xor_transfer - Transfer data from source to destination in one of
364 * three modes: XOR, CRC32 or DMA
367 * This function initiates XOR channel, according to function parameters,
368 * in order to perform XOR, CRC32 or DMA transaction.
369 * To gain maximum performance the user is asked to keep the following
371 * 1) Selected engine is available (not busy).
372 * 2) This module does not take into consideration CPU MMU issues.
373 * In order for the XOR engine to access the appropriate source
374 * and destination, address parameters must be given in system
376 * 3) This API does not take care of cache coherency issues. The source,
377 * destination and, in case of chain, the descriptor list are assumed
378 * to be cache coherent.
379 * 4) Parameters validity.
382 * chan - XOR channel number.
383 * type - One of three: XOR, CRC32 and DMA operations.
384 * xor_chain_ptr - address of chain pointer
390 * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
392 *******************************************************************************/
393 int mv_xor_transfer(u32 chan, enum xor_type type, u32 xor_chain_ptr)
397 /* Parameter checking */
398 if (chan >= MV_XOR_MAX_CHAN) {
399 DB(printf("%s: ERR. Invalid chan num %d\n", __func__, chan));
402 if (mv_xor_state_get(chan) == MV_ACTIVE) {
403 DB(printf("%s: ERR. Channel is already active\n", __func__));
406 if (xor_chain_ptr == 0x0) {
407 DB(printf("%s: ERR. xor_chain_ptr is NULL pointer\n", __func__));
411 /* read configuration register and mask the operation mode field */
412 temp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
413 temp &= ~XEXCR_OPERATION_MODE_MASK;
417 if ((xor_chain_ptr & XEXDPR_DST_PTR_XOR_MASK) != 0) {
418 DB(printf("%s: ERR. Invalid chain pointer (bits [5:0] must be cleared)\n",
422 /* set the operation mode to XOR */
423 temp |= XEXCR_OPERATION_MODE_XOR;
426 if ((xor_chain_ptr & XEXDPR_DST_PTR_DMA_MASK) != 0) {
427 DB(printf("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
431 /* set the operation mode to DMA */
432 temp |= XEXCR_OPERATION_MODE_DMA;
435 if ((xor_chain_ptr & XEXDPR_DST_PTR_CRC_MASK) != 0) {
436 DB(printf("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
440 /* set the operation mode to CRC32 */
441 temp |= XEXCR_OPERATION_MODE_CRC;
447 /* write the operation mode to the register */
448 reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), temp);
450 * update the NextDescPtr field in the XOR Engine [0..1] Next Descriptor
451 * Pointer Register (XExNDPR)
453 reg_write(XOR_NEXT_DESC_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
457 reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
458 XEXACTR_XESTART_MASK);