Hi Oak, Thank you for the patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on drm-tip/drm-tip v5.15-rc4 next-20211007] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Oak-Zeng/drm-i915-gem-Check-function-return-in-live_nop_switch/20211008-055247 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: x86_64-randconfig-a016-20211004 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/2d7a26805f7bf806f78efb6542a16f67ed8bc58c git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Oak-Zeng/drm-i915-gem-Check-function-return-in-live_nop_switch/20211008-055247 git checkout 2d7a26805f7bf806f78efb6542a16f67ed8bc58c # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/i915/gem/i915_gem_context.c:2279: drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c: In function 'live_nop_switch': >> drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c:94:26: error: implicit declaration of function 'to_gt'; did you mean 'uc_to_gt'? [-Werror=implicit-function-declaration] 94 | intel_gt_set_wedged(to_gt(i915)); | ^~~~~ | uc_to_gt >> drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c:94:26: warning: passing argument 1 of 'intel_gt_set_wedged' makes pointer from integer without a cast [-Wint-conversion] 94 | intel_gt_set_wedged(to_gt(i915)); | ^~~~~~~~~~~ | | | int In file included from drivers/gpu/drm/i915/gt/intel_gtt.h:28, from drivers/gpu/drm/i915/gt/gen6_ppgtt.h:9, from drivers/gpu/drm/i915/gem/i915_gem_context.c:72: drivers/gpu/drm/i915/gt/intel_reset.h:44:43: note: expected 'struct intel_gt *' but argument is of type 'int' 44 | void intel_gt_set_wedged(struct intel_gt *gt); | ~~~~~~~~~~~~~~~~~^~ cc1: some warnings being treated as errors vim +94 drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c 35 36 static int live_nop_switch(void *arg) 37 { 38 const unsigned int nctx = 1024; 39 struct drm_i915_private *i915 = arg; 40 struct intel_engine_cs *engine; 41 struct i915_gem_context **ctx; 42 struct igt_live_test t; 43 struct file *file; 44 unsigned long n; 45 int err = -ENODEV; 46 47 /* 48 * Create as many contexts as we can feasibly get away with 49 * and check we can switch between them rapidly. 50 * 51 * Serves as very simple stress test for submission and HW switching 52 * between contexts. 53 */ 54 55 if (!DRIVER_CAPS(i915)->has_logical_contexts) 56 return 0; 57 58 file = mock_file(i915); 59 if (IS_ERR(file)) 60 return PTR_ERR(file); 61 62 ctx = kcalloc(nctx, sizeof(*ctx), GFP_KERNEL); 63 if (!ctx) { 64 err = -ENOMEM; 65 goto out_file; 66 } 67 68 for (n = 0; n < nctx; n++) { 69 ctx[n] = live_context(i915, file); 70 if (IS_ERR(ctx[n])) { 71 err = PTR_ERR(ctx[n]); 72 goto out_file; 73 } 74 } 75 76 for_each_uabi_engine(engine, i915) { 77 struct i915_request *rq = NULL; 78 unsigned long end_time, prime; 79 ktime_t times[2] = {}; 80 81 times[0] = ktime_get_raw(); 82 for (n = 0; n < nctx; n++) { 83 struct i915_request *this; 84 85 this = igt_request_alloc(ctx[n], engine); 86 if (IS_ERR(this)) { 87 err = PTR_ERR(this); 88 goto out_file; 89 } 90 if (rq) { 91 if (i915_request_await_dma_fence(this, 92 &rq->fence)) { 93 pr_err("Failed to populate %ld contexts\n", n); > 94 intel_gt_set_wedged(to_gt(i915)); 95 i915_request_put(rq); 96 err = -EIO; 97 goto out_file; 98 } 99 i915_request_put(rq); 100 } 101 rq = i915_request_get(this); 102 i915_request_add(this); 103 } 104 if (i915_request_wait(rq, 0, HZ / 5) < 0) { 105 pr_err("Failed to populated %d contexts\n", nctx); 106 intel_gt_set_wedged(&i915->gt); 107 i915_request_put(rq); 108 err = -EIO; 109 goto out_file; 110 } 111 i915_request_put(rq); 112 113 times[1] = ktime_get_raw(); 114 115 pr_info("Populated %d contexts on %s in %lluns\n", 116 nctx, engine->name, ktime_to_ns(times[1] - times[0])); 117 118 err = igt_live_test_begin(&t, i915, __func__, engine->name); 119 if (err) 120 goto out_file; 121 122 end_time = jiffies + i915_selftest.timeout_jiffies; 123 for_each_prime_number_from(prime, 2, 8192) { 124 times[1] = ktime_get_raw(); 125 126 rq = NULL; 127 for (n = 0; n < prime; n++) { 128 struct i915_request *this; 129 130 this = igt_request_alloc(ctx[n % nctx], engine); 131 if (IS_ERR(this)) { 132 err = PTR_ERR(this); 133 goto out_file; 134 } 135 136 if (rq) { /* Force submission order */ 137 i915_request_await_dma_fence(this, &rq->fence); 138 i915_request_put(rq); 139 } 140 141 /* 142 * This space is left intentionally blank. 143 * 144 * We do not actually want to perform any 145 * action with this request, we just want 146 * to measure the latency in allocation 147 * and submission of our breadcrumbs - 148 * ensuring that the bare request is sufficient 149 * for the system to work (i.e. proper HEAD 150 * tracking of the rings, interrupt handling, 151 * etc). It also gives us the lowest bounds 152 * for latency. 153 */ 154 155 rq = i915_request_get(this); 156 i915_request_add(this); 157 } 158 GEM_BUG_ON(!rq); 159 if (i915_request_wait(rq, 0, HZ / 5) < 0) { 160 pr_err("Switching between %ld contexts timed out\n", 161 prime); 162 intel_gt_set_wedged(&i915->gt); 163 i915_request_put(rq); 164 break; 165 } 166 i915_request_put(rq); 167 168 times[1] = ktime_sub(ktime_get_raw(), times[1]); 169 if (prime == 2) 170 times[0] = times[1]; 171 172 if (__igt_timeout(end_time, NULL)) 173 break; 174 } 175 176 err = igt_live_test_end(&t); 177 if (err) 178 goto out_file; 179 180 pr_info("Switch latencies on %s: 1 = %lluns, %lu = %lluns\n", 181 engine->name, 182 ktime_to_ns(times[0]), 183 prime - 1, div64_u64(ktime_to_ns(times[1]), prime - 1)); 184 } 185 186 out_file: 187 fput(file); 188 return err; 189 } 190 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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