diff options
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_gpu.c')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 1911 |
1 files changed, 1911 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c new file mode 100644 index 000000000..f3281d56b --- /dev/null +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -0,0 +1,1911 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2015-2018 Etnaviv Project + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/delay.h> +#include <linux/dma-fence.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> +#include <linux/thermal.h> + +#include "etnaviv_cmdbuf.h" +#include "etnaviv_dump.h" +#include "etnaviv_gpu.h" +#include "etnaviv_gem.h" +#include "etnaviv_mmu.h" +#include "etnaviv_perfmon.h" +#include "etnaviv_sched.h" +#include "common.xml.h" +#include "state.xml.h" +#include "state_hi.xml.h" +#include "cmdstream.xml.h" + +#ifndef PHYS_OFFSET +#define PHYS_OFFSET 0 +#endif + +static const struct platform_device_id gpu_ids[] = { + { .name = "etnaviv-gpu,2d" }, + { }, +}; + +/* + * Driver functions: + */ + +int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value) +{ + struct etnaviv_drm_private *priv = gpu->drm->dev_private; + + switch (param) { + case ETNAVIV_PARAM_GPU_MODEL: + *value = gpu->identity.model; + break; + + case ETNAVIV_PARAM_GPU_REVISION: + *value = gpu->identity.revision; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_0: + *value = gpu->identity.features; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_1: + *value = gpu->identity.minor_features0; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_2: + *value = gpu->identity.minor_features1; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_3: + *value = gpu->identity.minor_features2; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_4: + *value = gpu->identity.minor_features3; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_5: + *value = gpu->identity.minor_features4; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_6: + *value = gpu->identity.minor_features5; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_7: + *value = gpu->identity.minor_features6; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_8: + *value = gpu->identity.minor_features7; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_9: + *value = gpu->identity.minor_features8; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_10: + *value = gpu->identity.minor_features9; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_11: + *value = gpu->identity.minor_features10; + break; + + case ETNAVIV_PARAM_GPU_FEATURES_12: + *value = gpu->identity.minor_features11; + break; + + case ETNAVIV_PARAM_GPU_STREAM_COUNT: + *value = gpu->identity.stream_count; + break; + + case ETNAVIV_PARAM_GPU_REGISTER_MAX: + *value = gpu->identity.register_max; + break; + + case ETNAVIV_PARAM_GPU_THREAD_COUNT: + *value = gpu->identity.thread_count; + break; + + case ETNAVIV_PARAM_GPU_VERTEX_CACHE_SIZE: + *value = gpu->identity.vertex_cache_size; + break; + + case ETNAVIV_PARAM_GPU_SHADER_CORE_COUNT: + *value = gpu->identity.shader_core_count; + break; + + case ETNAVIV_PARAM_GPU_PIXEL_PIPES: + *value = gpu->identity.pixel_pipes; + break; + + case ETNAVIV_PARAM_GPU_VERTEX_OUTPUT_BUFFER_SIZE: + *value = gpu->identity.vertex_output_buffer_size; + break; + + case ETNAVIV_PARAM_GPU_BUFFER_SIZE: + *value = gpu->identity.buffer_size; + break; + + case ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT: + *value = gpu->identity.instruction_count; + break; + + case ETNAVIV_PARAM_GPU_NUM_CONSTANTS: + *value = gpu->identity.num_constants; + break; + + case ETNAVIV_PARAM_GPU_NUM_VARYINGS: + *value = gpu->identity.varyings_count; + break; + + case ETNAVIV_PARAM_SOFTPIN_START_ADDR: + if (priv->mmu_global->version == ETNAVIV_IOMMU_V2) + *value = ETNAVIV_SOFTPIN_START_ADDRESS; + else + *value = ~0ULL; + break; + + default: + DBG("%s: invalid param: %u", dev_name(gpu->dev), param); + return -EINVAL; + } + + return 0; +} + + +#define etnaviv_is_model_rev(gpu, mod, rev) \ + ((gpu)->identity.model == chipModel_##mod && \ + (gpu)->identity.revision == rev) +#define etnaviv_field(val, field) \ + (((val) & field##__MASK) >> field##__SHIFT) + +static void etnaviv_hw_specs(struct etnaviv_gpu *gpu) +{ + if (gpu->identity.minor_features0 & + chipMinorFeatures0_MORE_MINOR_FEATURES) { + u32 specs[4]; + unsigned int streams; + + specs[0] = gpu_read(gpu, VIVS_HI_CHIP_SPECS); + specs[1] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_2); + specs[2] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_3); + specs[3] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_4); + + gpu->identity.stream_count = etnaviv_field(specs[0], + VIVS_HI_CHIP_SPECS_STREAM_COUNT); + gpu->identity.register_max = etnaviv_field(specs[0], + VIVS_HI_CHIP_SPECS_REGISTER_MAX); + gpu->identity.thread_count = etnaviv_field(specs[0], + VIVS_HI_CHIP_SPECS_THREAD_COUNT); + gpu->identity.vertex_cache_size = etnaviv_field(specs[0], + VIVS_HI_CHIP_SPECS_VERTEX_CACHE_SIZE); + gpu->identity.shader_core_count = etnaviv_field(specs[0], + VIVS_HI_CHIP_SPECS_SHADER_CORE_COUNT); + gpu->identity.pixel_pipes = etnaviv_field(specs[0], + VIVS_HI_CHIP_SPECS_PIXEL_PIPES); + gpu->identity.vertex_output_buffer_size = + etnaviv_field(specs[0], + VIVS_HI_CHIP_SPECS_VERTEX_OUTPUT_BUFFER_SIZE); + + gpu->identity.buffer_size = etnaviv_field(specs[1], + VIVS_HI_CHIP_SPECS_2_BUFFER_SIZE); + gpu->identity.instruction_count = etnaviv_field(specs[1], + VIVS_HI_CHIP_SPECS_2_INSTRUCTION_COUNT); + gpu->identity.num_constants = etnaviv_field(specs[1], + VIVS_HI_CHIP_SPECS_2_NUM_CONSTANTS); + + gpu->identity.varyings_count = etnaviv_field(specs[2], + VIVS_HI_CHIP_SPECS_3_VARYINGS_COUNT); + + /* This overrides the value from older register if non-zero */ + streams = etnaviv_field(specs[3], + VIVS_HI_CHIP_SPECS_4_STREAM_COUNT); + if (streams) + gpu->identity.stream_count = streams; + } + + /* Fill in the stream count if not specified */ + if (gpu->identity.stream_count == 0) { + if (gpu->identity.model >= 0x1000) + gpu->identity.stream_count = 4; + else + gpu->identity.stream_count = 1; + } + + /* Convert the register max value */ + if (gpu->identity.register_max) + gpu->identity.register_max = 1 << gpu->identity.register_max; + else if (gpu->identity.model == chipModel_GC400) + gpu->identity.register_max = 32; + else + gpu->identity.register_max = 64; + + /* Convert thread count */ + if (gpu->identity.thread_count) + gpu->identity.thread_count = 1 << gpu->identity.thread_count; + else if (gpu->identity.model == chipModel_GC400) + gpu->identity.thread_count = 64; + else if (gpu->identity.model == chipModel_GC500 || + gpu->identity.model == chipModel_GC530) + gpu->identity.thread_count = 128; + else + gpu->identity.thread_count = 256; + + if (gpu->identity.vertex_cache_size == 0) + gpu->identity.vertex_cache_size = 8; + + if (gpu->identity.shader_core_count == 0) { + if (gpu->identity.model >= 0x1000) + gpu->identity.shader_core_count = 2; + else + gpu->identity.shader_core_count = 1; + } + + if (gpu->identity.pixel_pipes == 0) + gpu->identity.pixel_pipes = 1; + + /* Convert virtex buffer size */ + if (gpu->identity.vertex_output_buffer_size) { + gpu->identity.vertex_output_buffer_size = + 1 << gpu->identity.vertex_output_buffer_size; + } else if (gpu->identity.model == chipModel_GC400) { + if (gpu->identity.revision < 0x4000) + gpu->identity.vertex_output_buffer_size = 512; + else if (gpu->identity.revision < 0x4200) + gpu->identity.vertex_output_buffer_size = 256; + else + gpu->identity.vertex_output_buffer_size = 128; + } else { + gpu->identity.vertex_output_buffer_size = 512; + } + + switch (gpu->identity.instruction_count) { + case 0: + if (etnaviv_is_model_rev(gpu, GC2000, 0x5108) || + gpu->identity.model == chipModel_GC880) + gpu->identity.instruction_count = 512; + else + gpu->identity.instruction_count = 256; + break; + + case 1: + gpu->identity.instruction_count = 1024; + break; + + case 2: + gpu->identity.instruction_count = 2048; + break; + + default: + gpu->identity.instruction_count = 256; + break; + } + + if (gpu->identity.num_constants == 0) + gpu->identity.num_constants = 168; + + if (gpu->identity.varyings_count == 0) { + if (gpu->identity.minor_features1 & chipMinorFeatures1_HALTI0) + gpu->identity.varyings_count = 12; + else + gpu->identity.varyings_count = 8; + } + + /* + * For some cores, two varyings are consumed for position, so the + * maximum varying count needs to be reduced by one. + */ + if (etnaviv_is_model_rev(gpu, GC5000, 0x5434) || + etnaviv_is_model_rev(gpu, GC4000, 0x5222) || + etnaviv_is_model_rev(gpu, GC4000, 0x5245) || + etnaviv_is_model_rev(gpu, GC4000, 0x5208) || + etnaviv_is_model_rev(gpu, GC3000, 0x5435) || + etnaviv_is_model_rev(gpu, GC2200, 0x5244) || + etnaviv_is_model_rev(gpu, GC2100, 0x5108) || + etnaviv_is_model_rev(gpu, GC2000, 0x5108) || + etnaviv_is_model_rev(gpu, GC1500, 0x5246) || + etnaviv_is_model_rev(gpu, GC880, 0x5107) || + etnaviv_is_model_rev(gpu, GC880, 0x5106)) + gpu->identity.varyings_count -= 1; +} + +static void etnaviv_hw_identify(struct etnaviv_gpu *gpu) +{ + u32 chipIdentity; + + chipIdentity = gpu_read(gpu, VIVS_HI_CHIP_IDENTITY); + + /* Special case for older graphic cores. */ + if (etnaviv_field(chipIdentity, VIVS_HI_CHIP_IDENTITY_FAMILY) == 0x01) { + gpu->identity.model = chipModel_GC500; + gpu->identity.revision = etnaviv_field(chipIdentity, + VIVS_HI_CHIP_IDENTITY_REVISION); + } else { + u32 chipDate = gpu_read(gpu, VIVS_HI_CHIP_DATE); + + gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL); + gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV); + gpu->identity.customer_id = gpu_read(gpu, VIVS_HI_CHIP_CUSTOMER_ID); + + /* + * Reading these two registers on GC600 rev 0x19 result in a + * unhandled fault: external abort on non-linefetch + */ + if (!etnaviv_is_model_rev(gpu, GC600, 0x19)) { + gpu->identity.product_id = gpu_read(gpu, VIVS_HI_CHIP_PRODUCT_ID); + gpu->identity.eco_id = gpu_read(gpu, VIVS_HI_CHIP_ECO_ID); + } + + /* + * !!!! HACK ALERT !!!! + * Because people change device IDs without letting software + * know about it - here is the hack to make it all look the + * same. Only for GC400 family. + */ + if ((gpu->identity.model & 0xff00) == 0x0400 && + gpu->identity.model != chipModel_GC420) { + gpu->identity.model = gpu->identity.model & 0x0400; + } + + /* Another special case */ + if (etnaviv_is_model_rev(gpu, GC300, 0x2201)) { + u32 chipTime = gpu_read(gpu, VIVS_HI_CHIP_TIME); + + if (chipDate == 0x20080814 && chipTime == 0x12051100) { + /* + * This IP has an ECO; put the correct + * revision in it. + */ + gpu->identity.revision = 0x1051; + } + } + + /* + * NXP likes to call the GPU on the i.MX6QP GC2000+, but in + * reality it's just a re-branded GC3000. We can identify this + * core by the upper half of the revision register being all 1. + * Fix model/rev here, so all other places can refer to this + * core by its real identity. + */ + if (etnaviv_is_model_rev(gpu, GC2000, 0xffff5450)) { + gpu->identity.model = chipModel_GC3000; + gpu->identity.revision &= 0xffff; + } + + if (etnaviv_is_model_rev(gpu, GC1000, 0x5037) && (chipDate == 0x20120617)) + gpu->identity.eco_id = 1; + + if (etnaviv_is_model_rev(gpu, GC320, 0x5303) && (chipDate == 0x20140511)) + gpu->identity.eco_id = 1; + } + + dev_info(gpu->dev, "model: GC%x, revision: %x\n", + gpu->identity.model, gpu->identity.revision); + + gpu->idle_mask = ~VIVS_HI_IDLE_STATE_AXI_LP; + /* + * If there is a match in the HWDB, we aren't interested in the + * remaining register values, as they might be wrong. + */ + if (etnaviv_fill_identity_from_hwdb(gpu)) + return; + + gpu->identity.features = gpu_read(gpu, VIVS_HI_CHIP_FEATURE); + + /* Disable fast clear on GC700. */ + if (gpu->identity.model == chipModel_GC700) + gpu->identity.features &= ~chipFeatures_FAST_CLEAR; + + /* These models/revisions don't have the 2D pipe bit */ + if ((gpu->identity.model == chipModel_GC500 && + gpu->identity.revision <= 2) || + gpu->identity.model == chipModel_GC300) + gpu->identity.features |= chipFeatures_PIPE_2D; + + if ((gpu->identity.model == chipModel_GC500 && + gpu->identity.revision < 2) || + (gpu->identity.model == chipModel_GC300 && + gpu->identity.revision < 0x2000)) { + + /* + * GC500 rev 1.x and GC300 rev < 2.0 doesn't have these + * registers. + */ + gpu->identity.minor_features0 = 0; + gpu->identity.minor_features1 = 0; + gpu->identity.minor_features2 = 0; + gpu->identity.minor_features3 = 0; + gpu->identity.minor_features4 = 0; + gpu->identity.minor_features5 = 0; + } else + gpu->identity.minor_features0 = + gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_0); + + if (gpu->identity.minor_features0 & + chipMinorFeatures0_MORE_MINOR_FEATURES) { + gpu->identity.minor_features1 = + gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_1); + gpu->identity.minor_features2 = + gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_2); + gpu->identity.minor_features3 = + gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_3); + gpu->identity.minor_features4 = + gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_4); + gpu->identity.minor_features5 = + gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5); + } + + /* GC600/300 idle register reports zero bits where modules aren't present */ + if (gpu->identity.model == chipModel_GC600 || + gpu->identity.model == chipModel_GC300) + gpu->idle_mask = VIVS_HI_IDLE_STATE_TX | + VIVS_HI_IDLE_STATE_RA | + VIVS_HI_IDLE_STATE_SE | + VIVS_HI_IDLE_STATE_PA | + VIVS_HI_IDLE_STATE_SH | + VIVS_HI_IDLE_STATE_PE | + VIVS_HI_IDLE_STATE_DE | + VIVS_HI_IDLE_STATE_FE; + + etnaviv_hw_specs(gpu); +} + +static void etnaviv_gpu_load_clock(struct etnaviv_gpu *gpu, u32 clock) +{ + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock | + VIVS_HI_CLOCK_CONTROL_FSCALE_CMD_LOAD); + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock); +} + +static void etnaviv_gpu_update_clock(struct etnaviv_gpu *gpu) +{ + if (gpu->identity.minor_features2 & + chipMinorFeatures2_DYNAMIC_FREQUENCY_SCALING) { + clk_set_rate(gpu->clk_core, + gpu->base_rate_core >> gpu->freq_scale); + clk_set_rate(gpu->clk_shader, + gpu->base_rate_shader >> gpu->freq_scale); + } else { + unsigned int fscale = 1 << (6 - gpu->freq_scale); + u32 clock = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); + + clock &= ~VIVS_HI_CLOCK_CONTROL_FSCALE_VAL__MASK; + clock |= VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); + etnaviv_gpu_load_clock(gpu, clock); + } +} + +static int etnaviv_hw_reset(struct etnaviv_gpu *gpu) +{ + u32 control, idle; + unsigned long timeout; + bool failed = true; + + /* We hope that the GPU resets in under one second */ + timeout = jiffies + msecs_to_jiffies(1000); + + while (time_is_after_jiffies(timeout)) { + /* enable clock */ + unsigned int fscale = 1 << (6 - gpu->freq_scale); + control = VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); + etnaviv_gpu_load_clock(gpu, control); + + /* isolate the GPU. */ + control |= VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); + + if (gpu->sec_mode == ETNA_SEC_KERNEL) { + gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, + VIVS_MMUv2_AHB_CONTROL_RESET); + } else { + /* set soft reset. */ + control |= VIVS_HI_CLOCK_CONTROL_SOFT_RESET; + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); + } + + /* wait for reset. */ + usleep_range(10, 20); + + /* reset soft reset bit. */ + control &= ~VIVS_HI_CLOCK_CONTROL_SOFT_RESET; + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); + + /* reset GPU isolation. */ + control &= ~VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); + + /* read idle register. */ + idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); + + /* try resetting again if FE is not idle */ + if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) { + dev_dbg(gpu->dev, "FE is not idle\n"); + continue; + } + + /* read reset register. */ + control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); + + /* is the GPU idle? */ + if (((control & VIVS_HI_CLOCK_CONTROL_IDLE_3D) == 0) || + ((control & VIVS_HI_CLOCK_CONTROL_IDLE_2D) == 0)) { + dev_dbg(gpu->dev, "GPU is not idle\n"); + continue; + } + + /* disable debug registers, as they are not normally needed */ + control |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); + + failed = false; + break; + } + + if (failed) { + idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); + control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); + + dev_err(gpu->dev, "GPU failed to reset: FE %sidle, 3D %sidle, 2D %sidle\n", + idle & VIVS_HI_IDLE_STATE_FE ? "" : "not ", + control & VIVS_HI_CLOCK_CONTROL_IDLE_3D ? "" : "not ", + control & VIVS_HI_CLOCK_CONTROL_IDLE_2D ? "" : "not "); + + return -EBUSY; + } + + /* We rely on the GPU running, so program the clock */ + etnaviv_gpu_update_clock(gpu); + + gpu->fe_running = false; + gpu->exec_state = -1; + if (gpu->mmu_context) + etnaviv_iommu_context_put(gpu->mmu_context); + gpu->mmu_context = NULL; + + return 0; +} + +static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu) +{ + u32 pmc, ppc; + + /* enable clock gating */ + ppc = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); + ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; + + /* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */ + if (gpu->identity.revision == 0x4301 || + gpu->identity.revision == 0x4302) + ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING; + + gpu_write(gpu, VIVS_PM_POWER_CONTROLS, ppc); + + pmc = gpu_read(gpu, VIVS_PM_MODULE_CONTROLS); + + /* Disable PA clock gating for GC400+ without bugfix except for GC420 */ + if (gpu->identity.model >= chipModel_GC400 && + gpu->identity.model != chipModel_GC420 && + !(gpu->identity.minor_features3 & chipMinorFeatures3_BUG_FIXES12)) + pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA; + + /* + * Disable PE clock gating on revs < 5.0.0.0 when HZ is + * present without a bug fix. + */ + if (gpu->identity.revision < 0x5000 && + gpu->identity.minor_features0 & chipMinorFeatures0_HZ && + !(gpu->identity.minor_features1 & + chipMinorFeatures1_DISABLE_PE_GATING)) + pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE; + + if (gpu->identity.revision < 0x5422) + pmc |= BIT(15); /* Unknown bit */ + + /* Disable TX clock gating on affected core revisions. */ + if (etnaviv_is_model_rev(gpu, GC4000, 0x5222) || + etnaviv_is_model_rev(gpu, GC2000, 0x5108)) + pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX; + + pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ; + pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ; + + gpu_write(gpu, VIVS_PM_MODULE_CONTROLS, pmc); +} + +void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch) +{ + gpu_write(gpu, VIVS_FE_COMMAND_ADDRESS, address); + gpu_write(gpu, VIVS_FE_COMMAND_CONTROL, + VIVS_FE_COMMAND_CONTROL_ENABLE | + VIVS_FE_COMMAND_CONTROL_PREFETCH(prefetch)); + + if (gpu->sec_mode == ETNA_SEC_KERNEL) { + gpu_write(gpu, VIVS_MMUv2_SEC_COMMAND_CONTROL, + VIVS_MMUv2_SEC_COMMAND_CONTROL_ENABLE | + VIVS_MMUv2_SEC_COMMAND_CONTROL_PREFETCH(prefetch)); + } + + gpu->fe_running = true; +} + +static void etnaviv_gpu_start_fe_idleloop(struct etnaviv_gpu *gpu, + struct etnaviv_iommu_context *context) +{ + u16 prefetch; + u32 address; + + /* setup the MMU */ + etnaviv_iommu_restore(gpu, context); + + /* Start command processor */ + prefetch = etnaviv_buffer_init(gpu); + address = etnaviv_cmdbuf_get_va(&gpu->buffer, + &gpu->mmu_context->cmdbuf_mapping); + + etnaviv_gpu_start_fe(gpu, address, prefetch); +} + +static void etnaviv_gpu_setup_pulse_eater(struct etnaviv_gpu *gpu) +{ + /* + * Base value for VIVS_PM_PULSE_EATER register on models where it + * cannot be read, extracted from vivante kernel driver. + */ + u32 pulse_eater = 0x01590880; + + if (etnaviv_is_model_rev(gpu, GC4000, 0x5208) || + etnaviv_is_model_rev(gpu, GC4000, 0x5222)) { + pulse_eater |= BIT(23); + + } + + if (etnaviv_is_model_rev(gpu, GC1000, 0x5039) || + etnaviv_is_model_rev(gpu, GC1000, 0x5040)) { + pulse_eater &= ~BIT(16); + pulse_eater |= BIT(17); + } + + if ((gpu->identity.revision > 0x5420) && + (gpu->identity.features & chipFeatures_PIPE_3D)) + { + /* Performance fix: disable internal DFS */ + pulse_eater = gpu_read(gpu, VIVS_PM_PULSE_EATER); + pulse_eater |= BIT(18); + } + + gpu_write(gpu, VIVS_PM_PULSE_EATER, pulse_eater); +} + +static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu) +{ + if ((etnaviv_is_model_rev(gpu, GC320, 0x5007) || + etnaviv_is_model_rev(gpu, GC320, 0x5220)) && + gpu_read(gpu, VIVS_HI_CHIP_TIME) != 0x2062400) { + u32 mc_memory_debug; + + mc_memory_debug = gpu_read(gpu, VIVS_MC_DEBUG_MEMORY) & ~0xff; + + if (gpu->identity.revision == 0x5007) + mc_memory_debug |= 0x0c; + else + mc_memory_debug |= 0x08; + + gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug); + } + + /* enable module-level clock gating */ + etnaviv_gpu_enable_mlcg(gpu); + + /* + * Update GPU AXI cache atttribute to "cacheable, no allocate". + * This is necessary to prevent the iMX6 SoC locking up. + */ + gpu_write(gpu, VIVS_HI_AXI_CONFIG, + VIVS_HI_AXI_CONFIG_AWCACHE(2) | + VIVS_HI_AXI_CONFIG_ARCACHE(2)); + + /* GC2000 rev 5108 needs a special bus config */ + if (etnaviv_is_model_rev(gpu, GC2000, 0x5108)) { + u32 bus_config = gpu_read(gpu, VIVS_MC_BUS_CONFIG); + bus_config &= ~(VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG__MASK | + VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG__MASK); + bus_config |= VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG(1) | + VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG(0); + gpu_write(gpu, VIVS_MC_BUS_CONFIG, bus_config); + } + + if (gpu->sec_mode == ETNA_SEC_KERNEL) { + u32 val = gpu_read(gpu, VIVS_MMUv2_AHB_CONTROL); + val |= VIVS_MMUv2_AHB_CONTROL_NONSEC_ACCESS; + gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, val); + } + + /* setup the pulse eater */ + etnaviv_gpu_setup_pulse_eater(gpu); + + gpu_write(gpu, VIVS_HI_INTR_ENBL, ~0U); +} + +int etnaviv_gpu_init(struct etnaviv_gpu *gpu) +{ + struct etnaviv_drm_private *priv = gpu->drm->dev_private; + int ret, i; + + ret = pm_runtime_get_sync(gpu->dev); + if (ret < 0) { + dev_err(gpu->dev, "Failed to enable GPU power domain\n"); + goto pm_put; + } + + etnaviv_hw_identify(gpu); + + if (gpu->identity.model == 0) { + dev_err(gpu->dev, "Unknown GPU model\n"); + ret = -ENXIO; + goto fail; + } + + /* Exclude VG cores with FE2.0 */ + if (gpu->identity.features & chipFeatures_PIPE_VG && + gpu->identity.features & chipFeatures_FE20) { + dev_info(gpu->dev, "Ignoring GPU with VG and FE2.0\n"); + ret = -ENXIO; + goto fail; + } + + /* + * On cores with security features supported, we claim control over the + * security states. + */ + if ((gpu->identity.minor_features7 & chipMinorFeatures7_BIT_SECURITY) && + (gpu->identity.minor_features10 & chipMinorFeatures10_SECURITY_AHB)) + gpu->sec_mode = ETNA_SEC_KERNEL; + + ret = etnaviv_hw_reset(gpu); + if (ret) { + dev_err(gpu->dev, "GPU reset failed\n"); + goto fail; + } + + ret = etnaviv_iommu_global_init(gpu); + if (ret) + goto fail; + + /* + * Set the GPU linear window to be at the end of the DMA window, where + * the CMA area is likely to reside. This ensures that we are able to + * map the command buffers while having the linear window overlap as + * much RAM as possible, so we can optimize mappings for other buffers. + * + * For 3D cores only do this if MC2.0 is present, as with MC1.0 it leads + * to different views of the memory on the individual engines. + */ + if (!(gpu->identity.features & chipFeatures_PIPE_3D) || + (gpu->identity.minor_features0 & chipMinorFeatures0_MC20)) { + u32 dma_mask = (u32)dma_get_required_mask(gpu->dev); + if (dma_mask < PHYS_OFFSET + SZ_2G) + priv->mmu_global->memory_base = PHYS_OFFSET; + else + priv->mmu_global->memory_base = dma_mask - SZ_2G + 1; + } else if (PHYS_OFFSET >= SZ_2G) { + dev_info(gpu->dev, "Need to move linear window on MC1.0, disabling TS\n"); + priv->mmu_global->memory_base = PHYS_OFFSET; + gpu->identity.features &= ~chipFeatures_FAST_CLEAR; + } + + /* + * If the GPU is part of a system with DMA addressing limitations, + * request pages for our SHM backend buffers from the DMA32 zone to + * hopefully avoid performance killing SWIOTLB bounce buffering. + */ + if (dma_addressing_limited(gpu->dev)) + priv->shm_gfp_mask |= GFP_DMA32; + + /* Create buffer: */ + ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &gpu->buffer, + PAGE_SIZE); + if (ret) { + dev_err(gpu->dev, "could not create command buffer\n"); + goto fail; + } + + /* Setup event management */ + spin_lock_init(&gpu->event_spinlock); + init_completion(&gpu->event_free); + bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS); + for (i = 0; i < ARRAY_SIZE(gpu->event); i++) + complete(&gpu->event_free); + + /* Now program the hardware */ + mutex_lock(&gpu->lock); + etnaviv_gpu_hw_init(gpu); + mutex_unlock(&gpu->lock); + + pm_runtime_mark_last_busy(gpu->dev); + pm_runtime_put_autosuspend(gpu->dev); + + gpu->initialized = true; + + return 0; + +fail: + pm_runtime_mark_last_busy(gpu->dev); +pm_put: + pm_runtime_put_autosuspend(gpu->dev); + + return ret; +} + +#ifdef CONFIG_DEBUG_FS +struct dma_debug { + u32 address[2]; + u32 state[2]; +}; + +static void verify_dma(struct etnaviv_gpu *gpu, struct dma_debug *debug) +{ + u32 i; + + debug->address[0] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); + debug->state[0] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE); + + for (i = 0; i < 500; i++) { + debug->address[1] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); + debug->state[1] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE); + + if (debug->address[0] != debug->address[1]) + break; + + if (debug->state[0] != debug->state[1]) + break; + } +} + +int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m) +{ + struct dma_debug debug; + u32 dma_lo, dma_hi, axi, idle; + int ret; + + seq_printf(m, "%s Status:\n", dev_name(gpu->dev)); + + ret = pm_runtime_get_sync(gpu->dev); + if (ret < 0) + goto pm_put; + + dma_lo = gpu_read(gpu, VIVS_FE_DMA_LOW); + dma_hi = gpu_read(gpu, VIVS_FE_DMA_HIGH); + axi = gpu_read(gpu, VIVS_HI_AXI_STATUS); + idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); + + verify_dma(gpu, &debug); + + seq_puts(m, "\tidentity\n"); + seq_printf(m, "\t model: 0x%x\n", gpu->identity.model); + seq_printf(m, "\t revision: 0x%x\n", gpu->identity.revision); + seq_printf(m, "\t product_id: 0x%x\n", gpu->identity.product_id); + seq_printf(m, "\t customer_id: 0x%x\n", gpu->identity.customer_id); + seq_printf(m, "\t eco_id: 0x%x\n", gpu->identity.eco_id); + + seq_puts(m, "\tfeatures\n"); + seq_printf(m, "\t major_features: 0x%08x\n", + gpu->identity.features); + seq_printf(m, "\t minor_features0: 0x%08x\n", + gpu->identity.minor_features0); + seq_printf(m, "\t minor_features1: 0x%08x\n", + gpu->identity.minor_features1); + seq_printf(m, "\t minor_features2: 0x%08x\n", + gpu->identity.minor_features2); + seq_printf(m, "\t minor_features3: 0x%08x\n", + gpu->identity.minor_features3); + seq_printf(m, "\t minor_features4: 0x%08x\n", + gpu->identity.minor_features4); + seq_printf(m, "\t minor_features5: 0x%08x\n", + gpu->identity.minor_features5); + seq_printf(m, "\t minor_features6: 0x%08x\n", + gpu->identity.minor_features6); + seq_printf(m, "\t minor_features7: 0x%08x\n", + gpu->identity.minor_features7); + seq_printf(m, "\t minor_features8: 0x%08x\n", + gpu->identity.minor_features8); + seq_printf(m, "\t minor_features9: 0x%08x\n", + gpu->identity.minor_features9); + seq_printf(m, "\t minor_features10: 0x%08x\n", + gpu->identity.minor_features10); + seq_printf(m, "\t minor_features11: 0x%08x\n", + gpu->identity.minor_features11); + + seq_puts(m, "\tspecs\n"); + seq_printf(m, "\t stream_count: %d\n", + gpu->identity.stream_count); + seq_printf(m, "\t register_max: %d\n", + gpu->identity.register_max); + seq_printf(m, "\t thread_count: %d\n", + gpu->identity.thread_count); + seq_printf(m, "\t vertex_cache_size: %d\n", + gpu->identity.vertex_cache_size); + seq_printf(m, "\t shader_core_count: %d\n", + gpu->identity.shader_core_count); + seq_printf(m, "\t pixel_pipes: %d\n", + gpu->identity.pixel_pipes); + seq_printf(m, "\t vertex_output_buffer_size: %d\n", + gpu->identity.vertex_output_buffer_size); + seq_printf(m, "\t buffer_size: %d\n", + gpu->identity.buffer_size); + seq_printf(m, "\t instruction_count: %d\n", + gpu->identity.instruction_count); + seq_printf(m, "\t num_constants: %d\n", + gpu->identity.num_constants); + seq_printf(m, "\t varyings_count: %d\n", + gpu->identity.varyings_count); + + seq_printf(m, "\taxi: 0x%08x\n", axi); + seq_printf(m, "\tidle: 0x%08x\n", idle); + idle |= ~gpu->idle_mask & ~VIVS_HI_IDLE_STATE_AXI_LP; + if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) + seq_puts(m, "\t FE is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_DE) == 0) + seq_puts(m, "\t DE is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_PE) == 0) + seq_puts(m, "\t PE is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_SH) == 0) + seq_puts(m, "\t SH is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_PA) == 0) + seq_puts(m, "\t PA is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_SE) == 0) + seq_puts(m, "\t SE is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_RA) == 0) + seq_puts(m, "\t RA is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_TX) == 0) + seq_puts(m, "\t TX is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_VG) == 0) + seq_puts(m, "\t VG is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_IM) == 0) + seq_puts(m, "\t IM is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_FP) == 0) + seq_puts(m, "\t FP is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_TS) == 0) + seq_puts(m, "\t TS is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_BL) == 0) + seq_puts(m, "\t BL is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_ASYNCFE) == 0) + seq_puts(m, "\t ASYNCFE is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_MC) == 0) + seq_puts(m, "\t MC is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_PPA) == 0) + seq_puts(m, "\t PPA is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_WD) == 0) + seq_puts(m, "\t WD is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_NN) == 0) + seq_puts(m, "\t NN is not idle\n"); + if ((idle & VIVS_HI_IDLE_STATE_TP) == 0) + seq_puts(m, "\t TP is not idle\n"); + if (idle & VIVS_HI_IDLE_STATE_AXI_LP) + seq_puts(m, "\t AXI low power mode\n"); + + if (gpu->identity.features & chipFeatures_DEBUG_MODE) { + u32 read0 = gpu_read(gpu, VIVS_MC_DEBUG_READ0); + u32 read1 = gpu_read(gpu, VIVS_MC_DEBUG_READ1); + u32 write = gpu_read(gpu, VIVS_MC_DEBUG_WRITE); + + seq_puts(m, "\tMC\n"); + seq_printf(m, "\t read0: 0x%08x\n", read0); + seq_printf(m, "\t read1: 0x%08x\n", read1); + seq_printf(m, "\t write: 0x%08x\n", write); + } + + seq_puts(m, "\tDMA "); + + if (debug.address[0] == debug.address[1] && + debug.state[0] == debug.state[1]) { + seq_puts(m, "seems to be stuck\n"); + } else if (debug.address[0] == debug.address[1]) { + seq_puts(m, "address is constant\n"); + } else { + seq_puts(m, "is running\n"); + } + + seq_printf(m, "\t address 0: 0x%08x\n", debug.address[0]); + seq_printf(m, "\t address 1: 0x%08x\n", debug.address[1]); + seq_printf(m, "\t state 0: 0x%08x\n", debug.state[0]); + seq_printf(m, "\t state 1: 0x%08x\n", debug.state[1]); + seq_printf(m, "\t last fetch 64 bit word: 0x%08x 0x%08x\n", + dma_lo, dma_hi); + + ret = 0; + + pm_runtime_mark_last_busy(gpu->dev); +pm_put: + pm_runtime_put_autosuspend(gpu->dev); + + return ret; +} +#endif + +void etnaviv_gpu_recover_hang(struct etnaviv_gpu *gpu) +{ + unsigned int i = 0; + + dev_err(gpu->dev, "recover hung GPU!\n"); + + if (pm_runtime_get_sync(gpu->dev) < 0) + goto pm_put; + + mutex_lock(&gpu->lock); + + etnaviv_hw_reset(gpu); + + /* complete all events, the GPU won't do it after the reset */ + spin_lock(&gpu->event_spinlock); + for_each_set_bit_from(i, gpu->event_bitmap, ETNA_NR_EVENTS) + complete(&gpu->event_free); + bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS); + spin_unlock(&gpu->event_spinlock); + + etnaviv_gpu_hw_init(gpu); + + mutex_unlock(&gpu->lock); + pm_runtime_mark_last_busy(gpu->dev); +pm_put: + pm_runtime_put_autosuspend(gpu->dev); +} + +/* fence object management */ +struct etnaviv_fence { + struct etnaviv_gpu *gpu; + struct dma_fence base; +}; + +static inline struct etnaviv_fence *to_etnaviv_fence(struct dma_fence *fence) +{ + return container_of(fence, struct etnaviv_fence, base); +} + +static const char *etnaviv_fence_get_driver_name(struct dma_fence *fence) +{ + return "etnaviv"; +} + +static const char *etnaviv_fence_get_timeline_name(struct dma_fence *fence) +{ + struct etnaviv_fence *f = to_etnaviv_fence(fence); + + return dev_name(f->gpu->dev); +} + +static bool etnaviv_fence_signaled(struct dma_fence *fence) +{ + struct etnaviv_fence *f = to_etnaviv_fence(fence); + + return (s32)(f->gpu->completed_fence - f->base.seqno) >= 0; +} + +static void etnaviv_fence_release(struct dma_fence *fence) +{ + struct etnaviv_fence *f = to_etnaviv_fence(fence); + + kfree_rcu(f, base.rcu); +} + +static const struct dma_fence_ops etnaviv_fence_ops = { + .get_driver_name = etnaviv_fence_get_driver_name, + .get_timeline_name = etnaviv_fence_get_timeline_name, + .signaled = etnaviv_fence_signaled, + .release = etnaviv_fence_release, +}; + +static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu) +{ + struct etnaviv_fence *f; + + /* + * GPU lock must already be held, otherwise fence completion order might + * not match the seqno order assigned here. + */ + lockdep_assert_held(&gpu->lock); + + f = kzalloc(sizeof(*f), GFP_KERNEL); + if (!f) + return NULL; + + f->gpu = gpu; + + dma_fence_init(&f->base, &etnaviv_fence_ops, &gpu->fence_spinlock, + gpu->fence_context, ++gpu->next_fence); + + return &f->base; +} + +/* returns true if fence a comes after fence b */ +static inline bool fence_after(u32 a, u32 b) +{ + return (s32)(a - b) > 0; +} + +/* + * event management: + */ + +static int event_alloc(struct etnaviv_gpu *gpu, unsigned nr_events, + unsigned int *events) +{ + unsigned long timeout = msecs_to_jiffies(10 * 10000); + unsigned i, acquired = 0; + + for (i = 0; i < nr_events; i++) { + unsigned long ret; + + ret = wait_for_completion_timeout(&gpu->event_free, timeout); + + if (!ret) { + dev_err(gpu->dev, "wait_for_completion_timeout failed"); + goto out; + } + + acquired++; + timeout = ret; + } + + spin_lock(&gpu->event_spinlock); + + for (i = 0; i < nr_events; i++) { + int event = find_first_zero_bit(gpu->event_bitmap, ETNA_NR_EVENTS); + + events[i] = event; + memset(&gpu->event[event], 0, sizeof(struct etnaviv_event)); + set_bit(event, gpu->event_bitmap); + } + + spin_unlock(&gpu->event_spinlock); + + return 0; + +out: + for (i = 0; i < acquired; i++) + complete(&gpu->event_free); + + return -EBUSY; +} + +static void event_free(struct etnaviv_gpu *gpu, unsigned int event) +{ + if (!test_bit(event, gpu->event_bitmap)) { + dev_warn(gpu->dev, "event %u is already marked as free", + event); + } else { + clear_bit(event, gpu->event_bitmap); + complete(&gpu->event_free); + } +} + +/* + * Cmdstream submission/retirement: + */ +int etnaviv_gpu_wait_fence_interruptible(struct etnaviv_gpu *gpu, + u32 id, struct drm_etnaviv_timespec *timeout) +{ + struct dma_fence *fence; + int ret; + + /* + * Look up the fence and take a reference. We might still find a fence + * whose refcount has already dropped to zero. dma_fence_get_rcu + * pretends we didn't find a fence in that case. + */ + rcu_read_lock(); + fence = idr_find(&gpu->fence_idr, id); + if (fence) + fence = dma_fence_get_rcu(fence); + rcu_read_unlock(); + + if (!fence) + return 0; + + if (!timeout) { + /* No timeout was requested: just test for completion */ + ret = dma_fence_is_signaled(fence) ? 0 : -EBUSY; + } else { + unsigned long remaining = etnaviv_timeout_to_jiffies(timeout); + + ret = dma_fence_wait_timeout(fence, true, remaining); + if (ret == 0) + ret = -ETIMEDOUT; + else if (ret != -ERESTARTSYS) + ret = 0; + + } + + dma_fence_put(fence); + return ret; +} + +/* + * Wait for an object to become inactive. This, on it's own, is not race + * free: the object is moved by the scheduler off the active list, and + * then the iova is put. Moreover, the object could be re-submitted just + * after we notice that it's become inactive. + * + * Although the retirement happens under the gpu lock, we don't want to hold + * that lock in this function while waiting. + */ +int etnaviv_gpu_wait_obj_inactive(struct etnaviv_gpu *gpu, + struct etnaviv_gem_object *etnaviv_obj, + struct drm_etnaviv_timespec *timeout) +{ + unsigned long remaining; + long ret; + + if (!timeout) + return !is_active(etnaviv_obj) ? 0 : -EBUSY; + + remaining = etnaviv_timeout_to_jiffies(timeout); + + ret = wait_event_interruptible_timeout(gpu->fence_event, + !is_active(etnaviv_obj), + remaining); + if (ret > 0) + return 0; + else if (ret == -ERESTARTSYS) + return -ERESTARTSYS; + else + return -ETIMEDOUT; +} + +static void sync_point_perfmon_sample(struct etnaviv_gpu *gpu, + struct etnaviv_event *event, unsigned int flags) +{ + const struct etnaviv_gem_submit *submit = event->submit; + unsigned int i; + + for (i = 0; i < submit->nr_pmrs; i++) { + const struct etnaviv_perfmon_request *pmr = submit->pmrs + i; + + if (pmr->flags == flags) + etnaviv_perfmon_process(gpu, pmr, submit->exec_state); + } +} + +static void sync_point_perfmon_sample_pre(struct etnaviv_gpu *gpu, + struct etnaviv_event *event) +{ + u32 val; + + /* disable clock gating */ + val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); + val &= ~VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; + gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val); + + /* enable debug register */ + val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); + val &= ~VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val); + + sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_PRE); +} + +static void sync_point_perfmon_sample_post(struct etnaviv_gpu *gpu, + struct etnaviv_event *event) +{ + const struct etnaviv_gem_submit *submit = event->submit; + unsigned int i; + u32 val; + + sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_POST); + + for (i = 0; i < submit->nr_pmrs; i++) { + const struct etnaviv_perfmon_request *pmr = submit->pmrs + i; + + *pmr->bo_vma = pmr->sequence; + } + + /* disable debug register */ + val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); + val |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; + gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val); + + /* enable clock gating */ + val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); + val |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; + gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val); +} + + +/* add bo's to gpu's ring, and kick gpu: */ +struct dma_fence *etnaviv_gpu_submit(struct etnaviv_gem_submit *submit) +{ + struct etnaviv_gpu *gpu = submit->gpu; + struct dma_fence *gpu_fence; + unsigned int i, nr_events = 1, event[3]; + int ret; + + if (!submit->runtime_resumed) { + ret = pm_runtime_get_sync(gpu->dev); + if (ret < 0) { + pm_runtime_put_noidle(gpu->dev); + return NULL; + } + submit->runtime_resumed = true; + } + + /* + * if there are performance monitor requests we need to have + * - a sync point to re-configure gpu and process ETNA_PM_PROCESS_PRE + * requests. + * - a sync point to re-configure gpu, process ETNA_PM_PROCESS_POST requests + * and update the sequence number for userspace. + */ + if (submit->nr_pmrs) + nr_events = 3; + + ret = event_alloc(gpu, nr_events, event); + if (ret) { + DRM_ERROR("no free events\n"); + pm_runtime_put_noidle(gpu->dev); + return NULL; + } + + mutex_lock(&gpu->lock); + + gpu_fence = etnaviv_gpu_fence_alloc(gpu); + if (!gpu_fence) { + for (i = 0; i < nr_events; i++) + event_free(gpu, event[i]); + + goto out_unlock; + } + + if (!gpu->fe_running) + etnaviv_gpu_start_fe_idleloop(gpu, submit->mmu_context); + + if (submit->prev_mmu_context) + etnaviv_iommu_context_put(submit->prev_mmu_context); + submit->prev_mmu_context = etnaviv_iommu_context_get(gpu->mmu_context); + + if (submit->nr_pmrs) { + gpu->event[event[1]].sync_point = &sync_point_perfmon_sample_pre; + kref_get(&submit->refcount); + gpu->event[event[1]].submit = submit; + etnaviv_sync_point_queue(gpu, event[1]); + } + + gpu->event[event[0]].fence = gpu_fence; + submit->cmdbuf.user_size = submit->cmdbuf.size - 8; + etnaviv_buffer_queue(gpu, submit->exec_state, submit->mmu_context, + event[0], &submit->cmdbuf); + + if (submit->nr_pmrs) { + gpu->event[event[2]].sync_point = &sync_point_perfmon_sample_post; + kref_get(&submit->refcount); + gpu->event[event[2]].submit = submit; + etnaviv_sync_point_queue(gpu, event[2]); + } + +out_unlock: + mutex_unlock(&gpu->lock); + + return gpu_fence; +} + +static void sync_point_worker(struct work_struct *work) +{ + struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu, + sync_point_work); + struct etnaviv_event *event = &gpu->event[gpu->sync_point_event]; + u32 addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); + + event->sync_point(gpu, event); + etnaviv_submit_put(event->submit); + event_free(gpu, gpu->sync_point_event); + + /* restart FE last to avoid GPU and IRQ racing against this worker */ + etnaviv_gpu_start_fe(gpu, addr + 2, 2); +} + +static void dump_mmu_fault(struct etnaviv_gpu *gpu) +{ + u32 status_reg, status; + int i; + + if (gpu->sec_mode == ETNA_SEC_NONE) + status_reg = VIVS_MMUv2_STATUS; + else + status_reg = VIVS_MMUv2_SEC_STATUS; + + status = gpu_read(gpu, status_reg); + dev_err_ratelimited(gpu->dev, "MMU fault status 0x%08x\n", status); + + for (i = 0; i < 4; i++) { + u32 address_reg; + + if (!(status & (VIVS_MMUv2_STATUS_EXCEPTION0__MASK << (i * 4)))) + continue; + + if (gpu->sec_mode == ETNA_SEC_NONE) + address_reg = VIVS_MMUv2_EXCEPTION_ADDR(i); + else + address_reg = VIVS_MMUv2_SEC_EXCEPTION_ADDR; + + dev_err_ratelimited(gpu->dev, "MMU %d fault addr 0x%08x\n", i, + gpu_read(gpu, address_reg)); + } +} + +static irqreturn_t irq_handler(int irq, void *data) +{ + struct etnaviv_gpu *gpu = data; + irqreturn_t ret = IRQ_NONE; + + u32 intr = gpu_read(gpu, VIVS_HI_INTR_ACKNOWLEDGE); + + if (intr != 0) { + int event; + + pm_runtime_mark_last_busy(gpu->dev); + + dev_dbg(gpu->dev, "intr 0x%08x\n", intr); + + if (intr & VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR) { + dev_err(gpu->dev, "AXI bus error\n"); + intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR; + } + + if (intr & VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION) { + dump_mmu_fault(gpu); + intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION; + } + + while ((event = ffs(intr)) != 0) { + struct dma_fence *fence; + + event -= 1; + + intr &= ~(1 << event); + + dev_dbg(gpu->dev, "event %u\n", event); + + if (gpu->event[event].sync_point) { + gpu->sync_point_event = event; + queue_work(gpu->wq, &gpu->sync_point_work); + } + + fence = gpu->event[event].fence; + if (!fence) + continue; + + gpu->event[event].fence = NULL; + + /* + * Events can be processed out of order. Eg, + * - allocate and queue event 0 + * - allocate event 1 + * - event 0 completes, we process it + * - allocate and queue event 0 + * - event 1 and event 0 complete + * we can end up processing event 0 first, then 1. + */ + if (fence_after(fence->seqno, gpu->completed_fence)) + gpu->completed_fence = fence->seqno; + dma_fence_signal(fence); + + event_free(gpu, event); + } + + ret = IRQ_HANDLED; + } + + return ret; +} + +static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu) +{ + int ret; + + ret = clk_prepare_enable(gpu->clk_reg); + if (ret) + return ret; + + ret = clk_prepare_enable(gpu->clk_bus); + if (ret) + goto disable_clk_reg; + + ret = clk_prepare_enable(gpu->clk_core); + if (ret) + goto disable_clk_bus; + + ret = clk_prepare_enable(gpu->clk_shader); + if (ret) + goto disable_clk_core; + + return 0; + +disable_clk_core: + clk_disable_unprepare(gpu->clk_core); +disable_clk_bus: + clk_disable_unprepare(gpu->clk_bus); +disable_clk_reg: + clk_disable_unprepare(gpu->clk_reg); + + return ret; +} + +static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu) +{ + clk_disable_unprepare(gpu->clk_shader); + clk_disable_unprepare(gpu->clk_core); + clk_disable_unprepare(gpu->clk_bus); + clk_disable_unprepare(gpu->clk_reg); + + return 0; +} + +int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); + + do { + u32 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); + + if ((idle & gpu->idle_mask) == gpu->idle_mask) + return 0; + + if (time_is_before_jiffies(timeout)) { + dev_warn(gpu->dev, + "timed out waiting for idle: idle=0x%x\n", + idle); + return -ETIMEDOUT; + } + + udelay(5); + } while (1); +} + +static int etnaviv_gpu_hw_suspend(struct etnaviv_gpu *gpu) +{ + if (gpu->initialized && gpu->fe_running) { + /* Replace the last WAIT with END */ + mutex_lock(&gpu->lock); + etnaviv_buffer_end(gpu); + mutex_unlock(&gpu->lock); + + /* + * We know that only the FE is busy here, this should + * happen quickly (as the WAIT is only 200 cycles). If + * we fail, just warn and continue. + */ + etnaviv_gpu_wait_idle(gpu, 100); + + gpu->fe_running = false; + } + + gpu->exec_state = -1; + + return etnaviv_gpu_clk_disable(gpu); +} + +#ifdef CONFIG_PM +static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu) +{ + int ret; + + ret = mutex_lock_killable(&gpu->lock); + if (ret) + return ret; + + etnaviv_gpu_update_clock(gpu); + etnaviv_gpu_hw_init(gpu); + + mutex_unlock(&gpu->lock); + + return 0; +} +#endif + +static int +etnaviv_gpu_cooling_get_max_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + *state = 6; + + return 0; +} + +static int +etnaviv_gpu_cooling_get_cur_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + struct etnaviv_gpu *gpu = cdev->devdata; + + *state = gpu->freq_scale; + + return 0; +} + +static int +etnaviv_gpu_cooling_set_cur_state(struct thermal_cooling_device *cdev, + unsigned long state) +{ + struct etnaviv_gpu *gpu = cdev->devdata; + + mutex_lock(&gpu->lock); + gpu->freq_scale = state; + if (!pm_runtime_suspended(gpu->dev)) + etnaviv_gpu_update_clock(gpu); + mutex_unlock(&gpu->lock); + + return 0; +} + +static struct thermal_cooling_device_ops cooling_ops = { + .get_max_state = etnaviv_gpu_cooling_get_max_state, + .get_cur_state = etnaviv_gpu_cooling_get_cur_state, + .set_cur_state = etnaviv_gpu_cooling_set_cur_state, +}; + +static int etnaviv_gpu_bind(struct device *dev, struct device *master, + void *data) +{ + struct drm_device *drm = data; + struct etnaviv_drm_private *priv = drm->dev_private; + struct etnaviv_gpu *gpu = dev_get_drvdata(dev); + int ret; + + if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) { + gpu->cooling = thermal_of_cooling_device_register(dev->of_node, + (char *)dev_name(dev), gpu, &cooling_ops); + if (IS_ERR(gpu->cooling)) + return PTR_ERR(gpu->cooling); + } + + gpu->wq = alloc_ordered_workqueue(dev_name(dev), 0); + if (!gpu->wq) { + ret = -ENOMEM; + goto out_thermal; + } + + ret = etnaviv_sched_init(gpu); + if (ret) + goto out_workqueue; + +#ifdef CONFIG_PM + ret = pm_runtime_get_sync(gpu->dev); +#else + ret = etnaviv_gpu_clk_enable(gpu); +#endif + if (ret < 0) + goto out_sched; + + + gpu->drm = drm; + gpu->fence_context = dma_fence_context_alloc(1); + idr_init(&gpu->fence_idr); + spin_lock_init(&gpu->fence_spinlock); + + INIT_WORK(&gpu->sync_point_work, sync_point_worker); + init_waitqueue_head(&gpu->fence_event); + + priv->gpu[priv->num_gpus++] = gpu; + + pm_runtime_mark_last_busy(gpu->dev); + pm_runtime_put_autosuspend(gpu->dev); + + return 0; + +out_sched: + etnaviv_sched_fini(gpu); + +out_workqueue: + destroy_workqueue(gpu->wq); + +out_thermal: + if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) + thermal_cooling_device_unregister(gpu->cooling); + + return ret; +} + +static void etnaviv_gpu_unbind(struct device *dev, struct device *master, + void *data) +{ + struct etnaviv_gpu *gpu = dev_get_drvdata(dev); + + DBG("%s", dev_name(gpu->dev)); + + flush_workqueue(gpu->wq); + destroy_workqueue(gpu->wq); + + etnaviv_sched_fini(gpu); + +#ifdef CONFIG_PM + pm_runtime_get_sync(gpu->dev); + pm_runtime_put_sync_suspend(gpu->dev); +#else + etnaviv_gpu_hw_suspend(gpu); +#endif + + if (gpu->mmu_context) + etnaviv_iommu_context_put(gpu->mmu_context); + + if (gpu->initialized) { + etnaviv_cmdbuf_free(&gpu->buffer); + etnaviv_iommu_global_fini(gpu); + gpu->initialized = false; + } + + gpu->drm = NULL; + idr_destroy(&gpu->fence_idr); + + if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) + thermal_cooling_device_unregister(gpu->cooling); + gpu->cooling = NULL; +} + +static const struct component_ops gpu_ops = { + .bind = etnaviv_gpu_bind, + .unbind = etnaviv_gpu_unbind, +}; + +static const struct of_device_id etnaviv_gpu_match[] = { + { + .compatible = "vivante,gc" + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, etnaviv_gpu_match); + +static int etnaviv_gpu_platform_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct etnaviv_gpu *gpu; + int err; + + gpu = devm_kzalloc(dev, sizeof(*gpu), GFP_KERNEL); + if (!gpu) + return -ENOMEM; + + gpu->dev = &pdev->dev; + mutex_init(&gpu->lock); + mutex_init(&gpu->fence_lock); + + /* Map registers: */ + gpu->mmio = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(gpu->mmio)) + return PTR_ERR(gpu->mmio); + + /* Get Interrupt: */ + gpu->irq = platform_get_irq(pdev, 0); + if (gpu->irq < 0) { + dev_err(dev, "failed to get irq: %d\n", gpu->irq); + return gpu->irq; + } + + err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0, + dev_name(gpu->dev), gpu); + if (err) { + dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err); + return err; + } + + /* Get Clocks: */ + gpu->clk_reg = devm_clk_get_optional(&pdev->dev, "reg"); + DBG("clk_reg: %p", gpu->clk_reg); + if (IS_ERR(gpu->clk_reg)) + return PTR_ERR(gpu->clk_reg); + + gpu->clk_bus = devm_clk_get_optional(&pdev->dev, "bus"); + DBG("clk_bus: %p", gpu->clk_bus); + if (IS_ERR(gpu->clk_bus)) + return PTR_ERR(gpu->clk_bus); + + gpu->clk_core = devm_clk_get(&pdev->dev, "core"); + DBG("clk_core: %p", gpu->clk_core); + if (IS_ERR(gpu->clk_core)) + return PTR_ERR(gpu->clk_core); + gpu->base_rate_core = clk_get_rate(gpu->clk_core); + + gpu->clk_shader = devm_clk_get_optional(&pdev->dev, "shader"); + DBG("clk_shader: %p", gpu->clk_shader); + if (IS_ERR(gpu->clk_shader)) + return PTR_ERR(gpu->clk_shader); + gpu->base_rate_shader = clk_get_rate(gpu->clk_shader); + + /* TODO: figure out max mapped size */ + dev_set_drvdata(dev, gpu); + + /* + * We treat the device as initially suspended. The runtime PM + * autosuspend delay is rather arbitary: no measurements have + * yet been performed to determine an appropriate value. + */ + pm_runtime_use_autosuspend(gpu->dev); + pm_runtime_set_autosuspend_delay(gpu->dev, 200); + pm_runtime_enable(gpu->dev); + + err = component_add(&pdev->dev, &gpu_ops); + if (err < 0) { + dev_err(&pdev->dev, "failed to register component: %d\n", err); + return err; + } + + return 0; +} + +static int etnaviv_gpu_platform_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &gpu_ops); + pm_runtime_disable(&pdev->dev); + return 0; +} + +#ifdef CONFIG_PM +static int etnaviv_gpu_rpm_suspend(struct device *dev) +{ + struct etnaviv_gpu *gpu = dev_get_drvdata(dev); + u32 idle, mask; + + /* If there are any jobs in the HW queue, we're not idle */ + if (atomic_read(&gpu->sched.hw_rq_count)) + return -EBUSY; + + /* Check whether the hardware (except FE and MC) is idle */ + mask = gpu->idle_mask & ~(VIVS_HI_IDLE_STATE_FE | + VIVS_HI_IDLE_STATE_MC); + idle = gpu_read(gpu, VIVS_HI_IDLE_STATE) & mask; + if (idle != mask) { + dev_warn_ratelimited(dev, "GPU not yet idle, mask: 0x%08x\n", + idle); + return -EBUSY; + } + + return etnaviv_gpu_hw_suspend(gpu); +} + +static int etnaviv_gpu_rpm_resume(struct device *dev) +{ + struct etnaviv_gpu *gpu = dev_get_drvdata(dev); + int ret; + + ret = etnaviv_gpu_clk_enable(gpu); + if (ret) + return ret; + + /* Re-initialise the basic hardware state */ + if (gpu->drm && gpu->initialized) { + ret = etnaviv_gpu_hw_resume(gpu); + if (ret) { + etnaviv_gpu_clk_disable(gpu); + return ret; + } + } + + return 0; +} +#endif + +static const struct dev_pm_ops etnaviv_gpu_pm_ops = { + SET_RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume, + NULL) +}; + +struct platform_driver etnaviv_gpu_driver = { + .driver = { + .name = "etnaviv-gpu", + .owner = THIS_MODULE, + .pm = &etnaviv_gpu_pm_ops, + .of_match_table = etnaviv_gpu_match, + }, + .probe = etnaviv_gpu_platform_probe, + .remove = etnaviv_gpu_platform_remove, + .id_table = gpu_ids, +}; |