1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2017-2018 The Linux Foundation. All rights reserved. */
5 #include <linux/iopoll.h>
6 #include <linux/pm_opp.h>
7 #include <soc/qcom/cmd-db.h>
10 #include "a6xx_gmu.xml.h"
12 static irqreturn_t a6xx_gmu_irq(int irq, void *data)
14 struct a6xx_gmu *gmu = data;
17 status = gmu_read(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_STATUS);
18 gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, status);
20 if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_WDOG_BITE) {
21 dev_err_ratelimited(gmu->dev, "GMU watchdog expired\n");
23 /* Temporary until we can recover safely */
27 if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_HOST_AHB_BUS_ERROR)
28 dev_err_ratelimited(gmu->dev, "GMU AHB bus error\n");
30 if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_FENCE_ERR)
31 dev_err_ratelimited(gmu->dev, "GMU fence error: 0x%x\n",
32 gmu_read(gmu, REG_A6XX_GMU_AHB_FENCE_STATUS));
37 static irqreturn_t a6xx_hfi_irq(int irq, void *data)
39 struct a6xx_gmu *gmu = data;
42 status = gmu_read(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO);
43 gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, status);
45 if (status & A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ)
46 tasklet_schedule(&gmu->hfi_tasklet);
48 if (status & A6XX_GMU_GMU2HOST_INTR_INFO_CM3_FAULT) {
49 dev_err_ratelimited(gmu->dev, "GMU firmware fault\n");
51 /* Temporary until we can recover safely */
58 /* Check to see if the GX rail is still powered */
59 static bool a6xx_gmu_gx_is_on(struct a6xx_gmu *gmu)
61 u32 val = gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS);
64 (A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_GX_HM_GDSC_POWER_OFF |
65 A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_GX_HM_CLK_OFF));
68 static int a6xx_gmu_set_freq(struct a6xx_gmu *gmu, int index)
70 gmu_write(gmu, REG_A6XX_GMU_DCVS_ACK_OPTION, 0);
72 gmu_write(gmu, REG_A6XX_GMU_DCVS_PERF_SETTING,
73 ((index << 24) & 0xff) | (3 & 0xf));
76 * Send an invalid index as a vote for the bus bandwidth and let the
77 * firmware decide on the right vote
79 gmu_write(gmu, REG_A6XX_GMU_DCVS_BW_SETTING, 0xff);
81 /* Set and clear the OOB for DCVS to trigger the GMU */
82 a6xx_gmu_set_oob(gmu, GMU_OOB_DCVS_SET);
83 a6xx_gmu_clear_oob(gmu, GMU_OOB_DCVS_SET);
85 return gmu_read(gmu, REG_A6XX_GMU_DCVS_RETURN);
88 static bool a6xx_gmu_check_idle_level(struct a6xx_gmu *gmu)
91 int local = gmu->idle_level;
93 /* SPTP and IFPC both report as IFPC */
94 if (gmu->idle_level == GMU_IDLE_STATE_SPTP)
95 local = GMU_IDLE_STATE_IFPC;
97 val = gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE);
100 if (gmu->idle_level != GMU_IDLE_STATE_IFPC ||
101 !a6xx_gmu_gx_is_on(gmu))
108 /* Wait for the GMU to get to its most idle state */
109 int a6xx_gmu_wait_for_idle(struct a6xx_gpu *a6xx_gpu)
111 struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
113 return spin_until(a6xx_gmu_check_idle_level(gmu));
116 static int a6xx_gmu_start(struct a6xx_gmu *gmu)
121 gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
122 gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 0);
124 ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, val,
125 val == 0xbabeface, 100, 10000);
128 dev_err(gmu->dev, "GMU firmware initialization timed out\n");
133 static int a6xx_gmu_hfi_start(struct a6xx_gmu *gmu)
138 gmu_rmw(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK,
139 A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ, 0);
141 gmu_write(gmu, REG_A6XX_GMU_HFI_CTRL_INIT, 1);
143 ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_HFI_CTRL_STATUS, val,
144 val & 1, 100, 10000);
146 dev_err(gmu->dev, "Unable to start the HFI queues\n");
151 /* Trigger a OOB (out of band) request to the GMU */
152 int a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
160 case GMU_OOB_GPU_SET:
161 request = GMU_OOB_GPU_SET_REQUEST;
162 ack = GMU_OOB_GPU_SET_ACK;
165 case GMU_OOB_BOOT_SLUMBER:
166 request = GMU_OOB_BOOT_SLUMBER_REQUEST;
167 ack = GMU_OOB_BOOT_SLUMBER_ACK;
168 name = "BOOT_SLUMBER";
170 case GMU_OOB_DCVS_SET:
171 request = GMU_OOB_DCVS_REQUEST;
172 ack = GMU_OOB_DCVS_ACK;
179 /* Trigger the equested OOB operation */
180 gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << request);
182 /* Wait for the acknowledge interrupt */
183 ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO, val,
184 val & (1 << ack), 100, 10000);
188 "Timeout waiting for GMU OOB set %s: 0x%x\n",
190 gmu_read(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO));
192 /* Clear the acknowledge interrupt */
193 gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, 1 << ack);
198 /* Clear a pending OOB state in the GMU */
199 void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
202 case GMU_OOB_GPU_SET:
203 gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
204 1 << GMU_OOB_GPU_SET_CLEAR);
206 case GMU_OOB_BOOT_SLUMBER:
207 gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
208 1 << GMU_OOB_BOOT_SLUMBER_CLEAR);
210 case GMU_OOB_DCVS_SET:
211 gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
212 1 << GMU_OOB_DCVS_CLEAR);
217 /* Enable CPU control of SPTP power power collapse */
218 static int a6xx_sptprac_enable(struct a6xx_gmu *gmu)
223 gmu_write(gmu, REG_A6XX_GMU_GX_SPTPRAC_POWER_CONTROL, 0x778000);
225 ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS, val,
226 (val & 0x38) == 0x28, 1, 100);
229 dev_err(gmu->dev, "Unable to power on SPTPRAC: 0x%x\n",
230 gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS));
236 /* Disable CPU control of SPTP power power collapse */
237 static void a6xx_sptprac_disable(struct a6xx_gmu *gmu)
242 /* Make sure retention is on */
243 gmu_rmw(gmu, REG_A6XX_GPU_CC_GX_GDSCR, 0, (1 << 11));
245 gmu_write(gmu, REG_A6XX_GMU_GX_SPTPRAC_POWER_CONTROL, 0x778001);
247 ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS, val,
248 (val & 0x04), 100, 10000);
251 dev_err(gmu->dev, "failed to power off SPTPRAC: 0x%x\n",
252 gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS));
255 /* Let the GMU know we are starting a boot sequence */
256 static int a6xx_gmu_gfx_rail_on(struct a6xx_gmu *gmu)
260 /* Let the GMU know we are getting ready for boot */
261 gmu_write(gmu, REG_A6XX_GMU_BOOT_SLUMBER_OPTION, 0);
263 /* Choose the "default" power level as the highest available */
264 vote = gmu->gx_arc_votes[gmu->nr_gpu_freqs - 1];
266 gmu_write(gmu, REG_A6XX_GMU_GX_VOTE_IDX, vote & 0xff);
267 gmu_write(gmu, REG_A6XX_GMU_MX_VOTE_IDX, (vote >> 8) & 0xff);
269 /* Let the GMU know the boot sequence has started */
270 return a6xx_gmu_set_oob(gmu, GMU_OOB_BOOT_SLUMBER);
273 /* Let the GMU know that we are about to go into slumber */
274 static int a6xx_gmu_notify_slumber(struct a6xx_gmu *gmu)
278 /* Disable the power counter so the GMU isn't busy */
279 gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 0);
281 /* Disable SPTP_PC if the CPU is responsible for it */
282 if (gmu->idle_level < GMU_IDLE_STATE_SPTP)
283 a6xx_sptprac_disable(gmu);
285 /* Tell the GMU to get ready to slumber */
286 gmu_write(gmu, REG_A6XX_GMU_BOOT_SLUMBER_OPTION, 1);
288 ret = a6xx_gmu_set_oob(gmu, GMU_OOB_BOOT_SLUMBER);
289 a6xx_gmu_clear_oob(gmu, GMU_OOB_BOOT_SLUMBER);
292 /* Check to see if the GMU really did slumber */
293 if (gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE)
295 dev_err(gmu->dev, "The GMU did not go into slumber\n");
300 /* Put fence into allow mode */
301 gmu_write(gmu, REG_A6XX_GMU_AO_AHB_FENCE_CTRL, 0);
305 static int a6xx_rpmh_start(struct a6xx_gmu *gmu)
310 gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 1 << 1);
311 /* Wait for the register to finish posting */
314 ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_RSCC_CONTROL_ACK, val,
315 val & (1 << 1), 100, 10000);
317 dev_err(gmu->dev, "Unable to power on the GPU RSC\n");
321 ret = gmu_poll_timeout(gmu, REG_A6XX_RSCC_SEQ_BUSY_DRV0, val,
325 gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 0);
327 /* Re-enable the power counter */
328 gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 1);
332 dev_err(gmu->dev, "GPU RSC sequence stuck while waking up the GPU\n");
336 static void a6xx_rpmh_stop(struct a6xx_gmu *gmu)
341 gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 1);
343 ret = gmu_poll_timeout(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0,
344 val, val & (1 << 16), 100, 10000);
346 dev_err(gmu->dev, "Unable to power off the GPU RSC\n");
348 gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 0);
351 static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
353 /* Disable SDE clock gating */
354 gmu_write(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0, BIT(24));
356 /* Setup RSC PDC handshake for sleep and wakeup */
357 gmu_write(gmu, REG_A6XX_RSCC_PDC_SLAVE_ID_DRV0, 1);
358 gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA, 0);
359 gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR, 0);
360 gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA + 2, 0);
361 gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR + 2, 0);
362 gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA + 4, 0x80000000);
363 gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR + 4, 0);
364 gmu_write(gmu, REG_A6XX_RSCC_OVERRIDE_START_ADDR, 0);
365 gmu_write(gmu, REG_A6XX_RSCC_PDC_SEQ_START_ADDR, 0x4520);
366 gmu_write(gmu, REG_A6XX_RSCC_PDC_MATCH_VALUE_LO, 0x4510);
367 gmu_write(gmu, REG_A6XX_RSCC_PDC_MATCH_VALUE_HI, 0x4514);
369 /* Load RSC sequencer uCode for sleep and wakeup */
370 gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0, 0xa7a506a0);
371 gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 1, 0xa1e6a6e7);
372 gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 2, 0xa2e081e1);
373 gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 3, 0xe9a982e2);
374 gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 4, 0x0020e8a8);
376 /* Load PDC sequencer uCode for power up and power down sequence */
377 pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0, 0xfebea1e1);
378 pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 1, 0xa5a4a3a2);
379 pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 2, 0x8382a6e0);
380 pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 3, 0xbce3e284);
381 pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 4, 0x002081fc);
383 /* Set TCS commands used by PDC sequence for low power modes */
384 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD_ENABLE_BANK, 7);
385 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD_WAIT_FOR_CMPL_BANK, 0);
386 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CONTROL, 0);
387 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID, 0x10108);
388 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR, 0x30010);
389 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA, 1);
390 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID + 4, 0x10108);
391 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR + 4, 0x30000);
392 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA + 4, 0x0);
393 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID + 8, 0x10108);
394 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR + 8, 0x30080);
395 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA + 8, 0x0);
396 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD_ENABLE_BANK, 7);
397 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD_WAIT_FOR_CMPL_BANK, 0);
398 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CONTROL, 0);
399 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID, 0x10108);
400 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR, 0x30010);
401 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA, 2);
402 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID + 4, 0x10108);
403 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR + 4, 0x30000);
404 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 4, 0x3);
405 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID + 8, 0x10108);
406 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR + 8, 0x30080);
407 pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 8, 0x3);
410 pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_START_ADDR, 0);
411 pdc_write(gmu, REG_A6XX_PDC_GPU_ENABLE_PDC, 0x80000001);
413 /* ensure no writes happen before the uCode is fully written */
418 * The lowest 16 bits of this value are the number of XO clock cycles for main
419 * hysteresis which is set at 0x1680 cycles (300 us). The higher 16 bits are
420 * for the shorter hysteresis that happens after main - this is 0xa (.5 us)
423 #define GMU_PWR_COL_HYST 0x000a1680
425 /* Set up the idle state for the GMU */
426 static void a6xx_gmu_power_config(struct a6xx_gmu *gmu)
428 /* Disable GMU WB/RB buffer */
429 gmu_write(gmu, REG_A6XX_GMU_SYS_BUS_CONFIG, 0x1);
431 gmu_write(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0x9c40400);
433 switch (gmu->idle_level) {
434 case GMU_IDLE_STATE_IFPC:
435 gmu_write(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_HYST,
437 gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
438 A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
439 A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_HM_POWER_COLLAPSE_ENABLE);
441 case GMU_IDLE_STATE_SPTP:
442 gmu_write(gmu, REG_A6XX_GMU_PWR_COL_SPTPRAC_HYST,
444 gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
445 A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
446 A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_SPTPRAC_POWER_CONTROL_ENABLE);
449 /* Enable RPMh GPU client */
450 gmu_rmw(gmu, REG_A6XX_GMU_RPMH_CTRL, 0,
451 A6XX_GMU_RPMH_CTRL_RPMH_INTERFACE_ENABLE |
452 A6XX_GMU_RPMH_CTRL_LLC_VOTE_ENABLE |
453 A6XX_GMU_RPMH_CTRL_DDR_VOTE_ENABLE |
454 A6XX_GMU_RPMH_CTRL_MX_VOTE_ENABLE |
455 A6XX_GMU_RPMH_CTRL_CX_VOTE_ENABLE |
456 A6XX_GMU_RPMH_CTRL_GFX_VOTE_ENABLE);
459 static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
461 static bool rpmh_init;
462 struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
463 struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
468 if (state == GMU_WARM_BOOT) {
469 ret = a6xx_rpmh_start(gmu);
473 if (WARN(!adreno_gpu->fw[ADRENO_FW_GMU],
474 "GMU firmware is not loaded\n"))
477 /* Sanity check the size of the firmware that was loaded */
478 if (adreno_gpu->fw[ADRENO_FW_GMU]->size > 0x8000) {
480 "GMU firmware is bigger than the available region\n");
484 /* Turn on register retention */
485 gmu_write(gmu, REG_A6XX_GMU_GENERAL_7, 1);
487 /* We only need to load the RPMh microcode once */
489 a6xx_gmu_rpmh_init(gmu);
491 } else if (state != GMU_RESET) {
492 ret = a6xx_rpmh_start(gmu);
497 image = (u32 *) adreno_gpu->fw[ADRENO_FW_GMU]->data;
499 for (i = 0; i < adreno_gpu->fw[ADRENO_FW_GMU]->size >> 2; i++)
500 gmu_write(gmu, REG_A6XX_GMU_CM3_ITCM_START + i,
504 gmu_write(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, 0);
505 gmu_write(gmu, REG_A6XX_GMU_CM3_BOOT_CONFIG, 0x02);
507 /* Write the iova of the HFI table */
508 gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_ADDR, gmu->hfi->iova);
509 gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_INFO, 1);
511 gmu_write(gmu, REG_A6XX_GMU_AHB_FENCE_RANGE_0,
512 (1 << 31) | (0xa << 18) | (0xa0));
514 chipid = adreno_gpu->rev.core << 24;
515 chipid |= adreno_gpu->rev.major << 16;
516 chipid |= adreno_gpu->rev.minor << 12;
517 chipid |= adreno_gpu->rev.patchid << 8;
519 gmu_write(gmu, REG_A6XX_GMU_HFI_SFR_ADDR, chipid);
521 /* Set up the lowest idle level on the GMU */
522 a6xx_gmu_power_config(gmu);
524 ret = a6xx_gmu_start(gmu);
528 ret = a6xx_gmu_gfx_rail_on(gmu);
532 /* Enable SPTP_PC if the CPU is responsible for it */
533 if (gmu->idle_level < GMU_IDLE_STATE_SPTP) {
534 ret = a6xx_sptprac_enable(gmu);
539 ret = a6xx_gmu_hfi_start(gmu);
543 /* FIXME: Do we need this wmb() here? */
549 #define A6XX_HFI_IRQ_MASK \
550 (A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ | \
551 A6XX_GMU_GMU2HOST_INTR_INFO_CM3_FAULT)
553 #define A6XX_GMU_IRQ_MASK \
554 (A6XX_GMU_AO_HOST_INTERRUPT_STATUS_WDOG_BITE | \
555 A6XX_GMU_AO_HOST_INTERRUPT_STATUS_HOST_AHB_BUS_ERROR | \
556 A6XX_GMU_AO_HOST_INTERRUPT_STATUS_FENCE_ERR)
558 static void a6xx_gmu_irq_enable(struct a6xx_gmu *gmu)
560 gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, ~0);
561 gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, ~0);
563 gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_MASK,
565 gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK,
568 enable_irq(gmu->gmu_irq);
569 enable_irq(gmu->hfi_irq);
572 static void a6xx_gmu_irq_disable(struct a6xx_gmu *gmu)
574 disable_irq(gmu->gmu_irq);
575 disable_irq(gmu->hfi_irq);
577 gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_MASK, ~0);
578 gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK, ~0);
581 int a6xx_gmu_reset(struct a6xx_gpu *a6xx_gpu)
583 struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
587 /* Flush all the queues */
590 /* Stop the interrupts */
591 a6xx_gmu_irq_disable(gmu);
593 /* Force off SPTP in case the GMU is managing it */
594 a6xx_sptprac_disable(gmu);
596 /* Make sure there are no outstanding RPMh votes */
597 gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS0_DRV0_STATUS, val,
598 (val & 1), 100, 10000);
599 gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS1_DRV0_STATUS, val,
600 (val & 1), 100, 10000);
601 gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS2_DRV0_STATUS, val,
602 (val & 1), 100, 10000);
603 gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS3_DRV0_STATUS, val,
604 (val & 1), 100, 1000);
606 /* Force off the GX GSDC */
607 regulator_force_disable(gmu->gx);
609 /* Disable the resources */
610 clk_bulk_disable_unprepare(gmu->nr_clocks, gmu->clocks);
611 pm_runtime_put_sync(gmu->dev);
613 /* Re-enable the resources */
614 pm_runtime_get_sync(gmu->dev);
616 /* Use a known rate to bring up the GMU */
617 clk_set_rate(gmu->core_clk, 200000000);
618 ret = clk_bulk_prepare_enable(gmu->nr_clocks, gmu->clocks);
622 a6xx_gmu_irq_enable(gmu);
624 ret = a6xx_gmu_fw_start(gmu, GMU_RESET);
626 ret = a6xx_hfi_start(gmu, GMU_COLD_BOOT);
628 /* Set the GPU back to the highest power frequency */
629 a6xx_gmu_set_freq(gmu, gmu->nr_gpu_freqs - 1);
633 a6xx_gmu_clear_oob(gmu, GMU_OOB_BOOT_SLUMBER);
638 int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu)
640 struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
643 if (WARN(!gmu->mmio, "The GMU is not set up yet\n"))
646 /* Turn on the resources */
647 pm_runtime_get_sync(gmu->dev);
649 /* Use a known rate to bring up the GMU */
650 clk_set_rate(gmu->core_clk, 200000000);
651 ret = clk_bulk_prepare_enable(gmu->nr_clocks, gmu->clocks);
655 a6xx_gmu_irq_enable(gmu);
657 /* Check to see if we are doing a cold or warm boot */
658 status = gmu_read(gmu, REG_A6XX_GMU_GENERAL_7) == 1 ?
659 GMU_WARM_BOOT : GMU_COLD_BOOT;
661 ret = a6xx_gmu_fw_start(gmu, status);
665 ret = a6xx_hfi_start(gmu, status);
667 /* Set the GPU to the highest power frequency */
668 a6xx_gmu_set_freq(gmu, gmu->nr_gpu_freqs - 1);
671 /* Make sure to turn off the boot OOB request on error */
673 a6xx_gmu_clear_oob(gmu, GMU_OOB_BOOT_SLUMBER);
678 bool a6xx_gmu_isidle(struct a6xx_gmu *gmu)
685 reg = gmu_read(gmu, REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS);
687 if (reg & A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS_GPUBUSYIGNAHB)
693 int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
695 struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
699 * The GMU may still be in slumber unless the GPU started so check and
700 * skip putting it back into slumber if so
702 val = gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE);
705 int ret = a6xx_gmu_wait_for_idle(a6xx_gpu);
707 /* Temporary until we can recover safely */
710 /* tell the GMU we want to slumber */
711 a6xx_gmu_notify_slumber(gmu);
713 ret = gmu_poll_timeout(gmu,
714 REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS, val,
715 !(val & A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS_GPUBUSYIGNAHB),
719 * Let the user know we failed to slumber but don't worry too
720 * much because we are powering down anyway
725 "Unable to slumber GMU: status = 0%x/0%x\n",
727 REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS),
729 REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS2));
735 /* Stop the interrupts and mask the hardware */
736 a6xx_gmu_irq_disable(gmu);
738 /* Tell RPMh to power off the GPU */
741 clk_bulk_disable_unprepare(gmu->nr_clocks, gmu->clocks);
743 pm_runtime_put_sync(gmu->dev);
748 static void a6xx_gmu_memory_free(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo)
753 if (IS_ERR_OR_NULL(bo))
756 count = bo->size >> PAGE_SHIFT;
759 for (i = 0; i < count; i++, iova += PAGE_SIZE) {
760 iommu_unmap(gmu->domain, iova, PAGE_SIZE);
761 __free_pages(bo->pages[i], 0);
768 static struct a6xx_gmu_bo *a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu,
771 struct a6xx_gmu_bo *bo;
774 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
776 return ERR_PTR(-ENOMEM);
778 bo->size = PAGE_ALIGN(size);
780 count = bo->size >> PAGE_SHIFT;
782 bo->pages = kcalloc(count, sizeof(struct page *), GFP_KERNEL);
785 return ERR_PTR(-ENOMEM);
788 for (i = 0; i < count; i++) {
789 bo->pages[i] = alloc_page(GFP_KERNEL);
794 bo->iova = gmu->uncached_iova_base;
796 for (i = 0; i < count; i++) {
797 ret = iommu_map(gmu->domain,
798 bo->iova + (PAGE_SIZE * i),
799 page_to_phys(bo->pages[i]), PAGE_SIZE,
800 IOMMU_READ | IOMMU_WRITE);
803 dev_err(gmu->dev, "Unable to map GMU buffer object\n");
805 for (i = i - 1 ; i >= 0; i--)
806 iommu_unmap(gmu->domain,
807 bo->iova + (PAGE_SIZE * i),
814 bo->virt = vmap(bo->pages, count, VM_IOREMAP,
815 pgprot_writecombine(PAGE_KERNEL));
819 /* Align future IOVA addresses on 1MB boundaries */
820 gmu->uncached_iova_base += ALIGN(size, SZ_1M);
825 for (i = 0; i < count; i++) {
827 __free_pages(bo->pages[i], 0);
833 return ERR_PTR(-ENOMEM);
836 static int a6xx_gmu_memory_probe(struct a6xx_gmu *gmu)
841 * The GMU address space is hardcoded to treat the range
842 * 0x60000000 - 0x80000000 as un-cached memory. All buffers shared
843 * between the GMU and the CPU will live in this space
845 gmu->uncached_iova_base = 0x60000000;
848 gmu->domain = iommu_domain_alloc(&platform_bus_type);
852 ret = iommu_attach_device(gmu->domain, gmu->dev);
855 iommu_domain_free(gmu->domain);
862 /* Get the list of RPMh voltage levels from cmd-db */
863 static int a6xx_gmu_rpmh_arc_cmds(const char *id, void *vals, int size)
865 u32 len = cmd_db_read_aux_data_len(id);
870 if (WARN_ON(len > size))
873 cmd_db_read_aux_data(id, vals, len);
876 * The data comes back as an array of unsigned shorts so adjust the
882 /* Return the 'arc-level' for the given frequency */
883 static u32 a6xx_gmu_get_arc_level(struct device *dev, unsigned long freq)
885 struct dev_pm_opp *opp;
886 struct device_node *np;
892 opp = dev_pm_opp_find_freq_exact(dev, freq, true);
896 np = dev_pm_opp_get_of_node(opp);
899 of_property_read_u32(np, "opp-level", &val);
908 static int a6xx_gmu_rpmh_arc_votes_init(struct device *dev, u32 *votes,
909 unsigned long *freqs, int freqs_count,
910 u16 *pri, int pri_count,
911 u16 *sec, int sec_count)
915 /* Construct a vote for each frequency */
916 for (i = 0; i < freqs_count; i++) {
917 u8 pindex = 0, sindex = 0;
918 u32 level = a6xx_gmu_get_arc_level(dev, freqs[i]);
920 /* Get the primary index that matches the arc level */
921 for (j = 0; j < pri_count; j++) {
922 if (pri[j] >= level) {
928 if (j == pri_count) {
930 "Level %u not found in in the RPMh list\n",
932 dev_err(dev, "Available levels:\n");
933 for (j = 0; j < pri_count; j++)
934 dev_err(dev, " %u\n", pri[j]);
940 * Look for a level in in the secondary list that matches. If
941 * nothing fits, use the maximum non zero vote
944 for (j = 0; j < sec_count; j++) {
945 if (sec[j] >= level) {
953 /* Construct the vote */
954 votes[i] = ((pri[pindex] & 0xffff) << 16) |
955 (sindex << 8) | pindex;
962 * The GMU votes with the RPMh for itself and on behalf of the GPU but we need
963 * to construct the list of votes on the CPU and send it over. Query the RPMh
964 * voltage levels and build the votes
967 static int a6xx_gmu_rpmh_votes_init(struct a6xx_gmu *gmu)
969 struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
970 struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
971 struct msm_gpu *gpu = &adreno_gpu->base;
973 u16 gx[16], cx[16], mx[16];
974 u32 gxcount, cxcount, mxcount;
977 /* Get the list of available voltage levels for each component */
978 gxcount = a6xx_gmu_rpmh_arc_cmds("gfx.lvl", gx, sizeof(gx));
979 cxcount = a6xx_gmu_rpmh_arc_cmds("cx.lvl", cx, sizeof(cx));
980 mxcount = a6xx_gmu_rpmh_arc_cmds("mx.lvl", mx, sizeof(mx));
982 /* Build the GX votes */
983 ret = a6xx_gmu_rpmh_arc_votes_init(&gpu->pdev->dev, gmu->gx_arc_votes,
984 gmu->gpu_freqs, gmu->nr_gpu_freqs,
985 gx, gxcount, mx, mxcount);
987 /* Build the CX votes */
988 ret |= a6xx_gmu_rpmh_arc_votes_init(gmu->dev, gmu->cx_arc_votes,
989 gmu->gmu_freqs, gmu->nr_gmu_freqs,
990 cx, cxcount, mx, mxcount);
995 static int a6xx_gmu_build_freq_table(struct device *dev, unsigned long *freqs,
998 int count = dev_pm_opp_get_opp_count(dev);
999 struct dev_pm_opp *opp;
1001 unsigned long freq = 1;
1004 * The OPP table doesn't contain the "off" frequency level so we need to
1005 * add 1 to the table size to account for it
1008 if (WARN(count + 1 > size,
1009 "The GMU frequency table is being truncated\n"))
1012 /* Set the "off" frequency */
1015 for (i = 0; i < count; i++) {
1016 opp = dev_pm_opp_find_freq_ceil(dev, &freq);
1020 dev_pm_opp_put(opp);
1021 freqs[index++] = freq++;
1027 static int a6xx_gmu_pwrlevels_probe(struct a6xx_gmu *gmu)
1029 struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
1030 struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
1031 struct msm_gpu *gpu = &adreno_gpu->base;
1036 * The GMU handles its own frequency switching so build a list of
1037 * available frequencies to send during initialization
1039 ret = dev_pm_opp_of_add_table(gmu->dev);
1041 dev_err(gmu->dev, "Unable to set the OPP table for the GMU\n");
1045 gmu->nr_gmu_freqs = a6xx_gmu_build_freq_table(gmu->dev,
1046 gmu->gmu_freqs, ARRAY_SIZE(gmu->gmu_freqs));
1049 * The GMU also handles GPU frequency switching so build a list
1050 * from the GPU OPP table
1052 gmu->nr_gpu_freqs = a6xx_gmu_build_freq_table(&gpu->pdev->dev,
1053 gmu->gpu_freqs, ARRAY_SIZE(gmu->gpu_freqs));
1055 /* Build the list of RPMh votes that we'll send to the GMU */
1056 return a6xx_gmu_rpmh_votes_init(gmu);
1059 static int a6xx_gmu_clocks_probe(struct a6xx_gmu *gmu)
1061 int ret = msm_clk_bulk_get(gmu->dev, &gmu->clocks);
1066 gmu->nr_clocks = ret;
1068 gmu->core_clk = msm_clk_bulk_get_clock(gmu->clocks,
1069 gmu->nr_clocks, "gmu");
1074 static void __iomem *a6xx_gmu_get_mmio(struct platform_device *pdev,
1078 struct resource *res = platform_get_resource_byname(pdev,
1079 IORESOURCE_MEM, name);
1082 dev_err(&pdev->dev, "Unable to find the %s registers\n", name);
1083 return ERR_PTR(-EINVAL);
1086 ret = devm_ioremap(&pdev->dev, res->start, resource_size(res));
1088 dev_err(&pdev->dev, "Unable to map the %s registers\n", name);
1089 return ERR_PTR(-EINVAL);
1095 static int a6xx_gmu_get_irq(struct a6xx_gmu *gmu, struct platform_device *pdev,
1096 const char *name, irq_handler_t handler)
1100 irq = platform_get_irq_byname(pdev, name);
1102 ret = devm_request_irq(&pdev->dev, irq, handler, IRQF_TRIGGER_HIGH,
1105 dev_err(&pdev->dev, "Unable to get interrupt %s\n", name);
1114 void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
1116 struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
1118 if (IS_ERR_OR_NULL(gmu->mmio))
1121 pm_runtime_disable(gmu->dev);
1122 a6xx_gmu_stop(a6xx_gpu);
1124 a6xx_gmu_irq_disable(gmu);
1125 a6xx_gmu_memory_free(gmu, gmu->hfi);
1127 iommu_detach_device(gmu->domain, gmu->dev);
1129 iommu_domain_free(gmu->domain);
1132 int a6xx_gmu_probe(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
1134 struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
1135 struct platform_device *pdev = of_find_device_by_node(node);
1141 gmu->dev = &pdev->dev;
1143 of_dma_configure(gmu->dev, node, true);
1145 /* Fow now, don't do anything fancy until we get our feet under us */
1146 gmu->idle_level = GMU_IDLE_STATE_ACTIVE;
1148 pm_runtime_enable(gmu->dev);
1149 gmu->gx = devm_regulator_get(gmu->dev, "vdd");
1151 /* Get the list of clocks */
1152 ret = a6xx_gmu_clocks_probe(gmu);
1156 /* Set up the IOMMU context bank */
1157 ret = a6xx_gmu_memory_probe(gmu);
1161 /* Allocate memory for for the HFI queues */
1162 gmu->hfi = a6xx_gmu_memory_alloc(gmu, SZ_16K);
1163 if (IS_ERR(gmu->hfi))
1166 /* Allocate memory for the GMU debug region */
1167 gmu->debug = a6xx_gmu_memory_alloc(gmu, SZ_16K);
1168 if (IS_ERR(gmu->debug))
1171 /* Map the GMU registers */
1172 gmu->mmio = a6xx_gmu_get_mmio(pdev, "gmu");
1174 /* Map the GPU power domain controller registers */
1175 gmu->pdc_mmio = a6xx_gmu_get_mmio(pdev, "gmu_pdc");
1177 if (IS_ERR(gmu->mmio) || IS_ERR(gmu->pdc_mmio))
1180 /* Get the HFI and GMU interrupts */
1181 gmu->hfi_irq = a6xx_gmu_get_irq(gmu, pdev, "hfi", a6xx_hfi_irq);
1182 gmu->gmu_irq = a6xx_gmu_get_irq(gmu, pdev, "gmu", a6xx_gmu_irq);
1184 if (gmu->hfi_irq < 0 || gmu->gmu_irq < 0)
1187 /* Set up a tasklet to handle GMU HFI responses */
1188 tasklet_init(&gmu->hfi_tasklet, a6xx_hfi_task, (unsigned long) gmu);
1190 /* Get the power levels for the GMU and GPU */
1191 a6xx_gmu_pwrlevels_probe(gmu);
1193 /* Set up the HFI queues */
1198 a6xx_gmu_memory_free(gmu, gmu->hfi);
1201 iommu_detach_device(gmu->domain, gmu->dev);
1203 iommu_domain_free(gmu->domain);