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i915_getparam.c revision 1.1 
      1 /*	$NetBSD: i915_getparam.c,v 1.1 2021/12/18 20:15:25 riastradh Exp $	*/
      2 
      3 /*
      4  * SPDX-License-Identifier: MIT
      5  */
      6 
      7 #include <sys/cdefs.h>
      8 __KERNEL_RCSID(0, "$NetBSD: i915_getparam.c,v 1.1 2021/12/18 20:15:25 riastradh Exp $");
      9 
     10 #include "gem/i915_gem_mman.h"
     11 #include "gt/intel_engine_user.h"
     12 
     13 #include "i915_drv.h"
     14 #include "i915_perf.h"
     15 
     16 int i915_getparam_ioctl(struct drm_device *dev, void *data,
     17 			struct drm_file *file_priv)
     18 {
     19 	struct drm_i915_private *i915 = to_i915(dev);
     20 	const struct sseu_dev_info *sseu = &RUNTIME_INFO(i915)->sseu;
     21 	drm_i915_getparam_t *param = data;
     22 	int value;
     23 
     24 	switch (param->param) {
     25 	case I915_PARAM_IRQ_ACTIVE:
     26 	case I915_PARAM_ALLOW_BATCHBUFFER:
     27 	case I915_PARAM_LAST_DISPATCH:
     28 	case I915_PARAM_HAS_EXEC_CONSTANTS:
     29 		/* Reject all old ums/dri params. */
     30 		return -ENODEV;
     31 	case I915_PARAM_CHIPSET_ID:
     32 		value = i915->drm.pdev->device;
     33 		break;
     34 	case I915_PARAM_REVISION:
     35 		value = i915->drm.pdev->revision;
     36 		break;
     37 	case I915_PARAM_NUM_FENCES_AVAIL:
     38 		value = i915->ggtt.num_fences;
     39 		break;
     40 	case I915_PARAM_HAS_OVERLAY:
     41 		value = !!i915->overlay;
     42 		break;
     43 	case I915_PARAM_HAS_BSD:
     44 		value = !!intel_engine_lookup_user(i915,
     45 						   I915_ENGINE_CLASS_VIDEO, 0);
     46 		break;
     47 	case I915_PARAM_HAS_BLT:
     48 		value = !!intel_engine_lookup_user(i915,
     49 						   I915_ENGINE_CLASS_COPY, 0);
     50 		break;
     51 	case I915_PARAM_HAS_VEBOX:
     52 		value = !!intel_engine_lookup_user(i915,
     53 						   I915_ENGINE_CLASS_VIDEO_ENHANCE, 0);
     54 		break;
     55 	case I915_PARAM_HAS_BSD2:
     56 		value = !!intel_engine_lookup_user(i915,
     57 						   I915_ENGINE_CLASS_VIDEO, 1);
     58 		break;
     59 	case I915_PARAM_HAS_LLC:
     60 		value = HAS_LLC(i915);
     61 		break;
     62 	case I915_PARAM_HAS_WT:
     63 		value = HAS_WT(i915);
     64 		break;
     65 	case I915_PARAM_HAS_ALIASING_PPGTT:
     66 		value = INTEL_PPGTT(i915);
     67 		break;
     68 	case I915_PARAM_HAS_SEMAPHORES:
     69 		value = !!(i915->caps.scheduler & I915_SCHEDULER_CAP_SEMAPHORES);
     70 		break;
     71 	case I915_PARAM_HAS_SECURE_BATCHES:
     72 		value = HAS_SECURE_BATCHES(i915) && capable(CAP_SYS_ADMIN);
     73 		break;
     74 	case I915_PARAM_CMD_PARSER_VERSION:
     75 		value = i915_cmd_parser_get_version(i915);
     76 		break;
     77 	case I915_PARAM_SUBSLICE_TOTAL:
     78 		value = intel_sseu_subslice_total(sseu);
     79 		if (!value)
     80 			return -ENODEV;
     81 		break;
     82 	case I915_PARAM_EU_TOTAL:
     83 		value = sseu->eu_total;
     84 		if (!value)
     85 			return -ENODEV;
     86 		break;
     87 	case I915_PARAM_HAS_GPU_RESET:
     88 		value = i915_modparams.enable_hangcheck &&
     89 			intel_has_gpu_reset(&i915->gt);
     90 		if (value && intel_has_reset_engine(&i915->gt))
     91 			value = 2;
     92 		break;
     93 	case I915_PARAM_HAS_RESOURCE_STREAMER:
     94 		value = 0;
     95 		break;
     96 	case I915_PARAM_HAS_POOLED_EU:
     97 		value = HAS_POOLED_EU(i915);
     98 		break;
     99 	case I915_PARAM_MIN_EU_IN_POOL:
    100 		value = sseu->min_eu_in_pool;
    101 		break;
    102 	case I915_PARAM_HUC_STATUS:
    103 		value = intel_huc_check_status(&i915->gt.uc.huc);
    104 		if (value < 0)
    105 			return value;
    106 		break;
    107 	case I915_PARAM_MMAP_GTT_VERSION:
    108 		/* Though we've started our numbering from 1, and so class all
    109 		 * earlier versions as 0, in effect their value is undefined as
    110 		 * the ioctl will report EINVAL for the unknown param!
    111 		 */
    112 		value = i915_gem_mmap_gtt_version();
    113 		break;
    114 	case I915_PARAM_HAS_SCHEDULER:
    115 		value = i915->caps.scheduler;
    116 		break;
    117 
    118 	case I915_PARAM_MMAP_VERSION:
    119 		/* Remember to bump this if the version changes! */
    120 	case I915_PARAM_HAS_GEM:
    121 	case I915_PARAM_HAS_PAGEFLIPPING:
    122 	case I915_PARAM_HAS_EXECBUF2: /* depends on GEM */
    123 	case I915_PARAM_HAS_RELAXED_FENCING:
    124 	case I915_PARAM_HAS_COHERENT_RINGS:
    125 	case I915_PARAM_HAS_RELAXED_DELTA:
    126 	case I915_PARAM_HAS_GEN7_SOL_RESET:
    127 	case I915_PARAM_HAS_WAIT_TIMEOUT:
    128 	case I915_PARAM_HAS_PRIME_VMAP_FLUSH:
    129 	case I915_PARAM_HAS_PINNED_BATCHES:
    130 	case I915_PARAM_HAS_EXEC_NO_RELOC:
    131 	case I915_PARAM_HAS_EXEC_HANDLE_LUT:
    132 	case I915_PARAM_HAS_COHERENT_PHYS_GTT:
    133 	case I915_PARAM_HAS_EXEC_SOFTPIN:
    134 	case I915_PARAM_HAS_EXEC_ASYNC:
    135 	case I915_PARAM_HAS_EXEC_FENCE:
    136 	case I915_PARAM_HAS_EXEC_CAPTURE:
    137 	case I915_PARAM_HAS_EXEC_BATCH_FIRST:
    138 	case I915_PARAM_HAS_EXEC_FENCE_ARRAY:
    139 	case I915_PARAM_HAS_EXEC_SUBMIT_FENCE:
    140 		/* For the time being all of these are always true;
    141 		 * if some supported hardware does not have one of these
    142 		 * features this value needs to be provided from
    143 		 * INTEL_INFO(), a feature macro, or similar.
    144 		 */
    145 		value = 1;
    146 		break;
    147 	case I915_PARAM_HAS_CONTEXT_ISOLATION:
    148 		value = intel_engines_has_context_isolation(i915);
    149 		break;
    150 	case I915_PARAM_SLICE_MASK:
    151 		value = sseu->slice_mask;
    152 		if (!value)
    153 			return -ENODEV;
    154 		break;
    155 	case I915_PARAM_SUBSLICE_MASK:
    156 		value = sseu->subslice_mask[0];
    157 		if (!value)
    158 			return -ENODEV;
    159 		break;
    160 	case I915_PARAM_CS_TIMESTAMP_FREQUENCY:
    161 		value = 1000 * RUNTIME_INFO(i915)->cs_timestamp_frequency_khz;
    162 		break;
    163 	case I915_PARAM_MMAP_GTT_COHERENT:
    164 		value = INTEL_INFO(i915)->has_coherent_ggtt;
    165 		break;
    166 	case I915_PARAM_PERF_REVISION:
    167 		value = i915_perf_ioctl_version();
    168 		break;
    169 	default:
    170 		DRM_DEBUG("Unknown parameter %d\n", param->param);
    171 		return -EINVAL;
    172 	}
    173 
    174 	if (put_user(value, param->value))
    175 		return -EFAULT;
    176 
    177 	return 0;
    178 }
    179