/* Copy RSA signature from the fw image to HW for verification */ staticint guc_xfer_rsa(struct intel_uc_fw *guc_fw, struct intel_uncore *uncore)
{ if (guc_fw->rsa_data) return guc_xfer_rsa_vma(guc_fw, uncore); else return guc_xfer_rsa_mmio(guc_fw, uncore);
}
/* * Read the GuC status register (GUC_STATUS) and store it in the * specified location; then return a boolean indicating whether * the value matches either completion or a known failure code. * * This is used for polling the GuC status in a wait_for() * loop below.
*/ staticinlinebool guc_load_done(struct intel_uncore *uncore, u32 *status, bool *success)
{
u32 val = intel_uncore_read(uncore, GUC_STATUS);
u32 uk_val = REG_FIELD_GET(GS_UKERNEL_MASK, val);
u32 br_val = REG_FIELD_GET(GS_BOOTROM_MASK, val);
case INTEL_GUC_LOAD_STATUS_ERROR_DEVID_BUILD_MISMATCH: case INTEL_GUC_LOAD_STATUS_GUC_PREPROD_BUILD_MISMATCH: case INTEL_GUC_LOAD_STATUS_ERROR_DEVID_INVALID_GUCTYPE: case INTEL_GUC_LOAD_STATUS_HWCONFIG_ERROR: case INTEL_GUC_LOAD_STATUS_DPC_ERROR: case INTEL_GUC_LOAD_STATUS_EXCEPTION: case INTEL_GUC_LOAD_STATUS_INIT_DATA_INVALID: case INTEL_GUC_LOAD_STATUS_MPU_DATA_INVALID: case INTEL_GUC_LOAD_STATUS_INIT_MMIO_SAVE_RESTORE_INVALID: case INTEL_GUC_LOAD_STATUS_KLV_WORKAROUND_INIT_ERROR:
*success = false; returntrue;
}
switch (br_val) { case INTEL_BOOTROM_STATUS_NO_KEY_FOUND: case INTEL_BOOTROM_STATUS_RSA_FAILED: case INTEL_BOOTROM_STATUS_PAVPC_FAILED: case INTEL_BOOTROM_STATUS_WOPCM_FAILED: case INTEL_BOOTROM_STATUS_LOADLOC_FAILED: case INTEL_BOOTROM_STATUS_JUMP_FAILED: case INTEL_BOOTROM_STATUS_RC6CTXCONFIG_FAILED: case INTEL_BOOTROM_STATUS_MPUMAP_INCORRECT: case INTEL_BOOTROM_STATUS_EXCEPTION: case INTEL_BOOTROM_STATUS_PROD_KEY_CHECK_FAILURE:
*success = false; returntrue;
}
returnfalse;
}
/* * Use a longer timeout for debug builds so that problems can be detected * and analysed. But a shorter timeout for releases so that user's don't * wait forever to find out there is a problem. Note that the only reason * an end user should hit the timeout is in case of extreme thermal throttling. * And a system that is that hot during boot is probably dead anyway!
*/ #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) #define GUC_LOAD_RETRY_LIMIT 20 #else #define GUC_LOAD_RETRY_LIMIT 3 #endif
/* * Wait for the GuC to start up. * * Measurements indicate this should take no more than 20ms * (assuming the GT clock is at maximum frequency). So, a * timeout here indicates that the GuC has failed and is unusable. * (Higher levels of the driver may decide to reset the GuC and * attempt the ucode load again if this happens.) * * FIXME: There is a known (but exceedingly unlikely) race condition * where the asynchronous frequency management code could reduce * the GT clock while a GuC reload is in progress (during a full * GT reset). A fix is in progress but there are complex locking * issues to be resolved. In the meantime bump the timeout to * 200ms. Even at slowest clock, this should be sufficient. And * in the working case, a larger timeout makes no difference. * * IFWI updates have also been seen to cause sporadic failures due to * the requested frequency not being granted and thus the firmware * load is attempted at minimum frequency. That can lead to load times * in the seconds range. However, there is a limit on how long an * individual wait_for() can wait. So wrap it in a loop.
*/
before_freq = intel_rps_read_actual_frequency(>->rps);
before = ktime_get(); for (count = 0; count < GUC_LOAD_RETRY_LIMIT; count++) {
ret = wait_for(guc_load_done(uncore, &status, &success), 1000); if (!ret || !success) break;
guc_dbg(guc, "load still in progress, count = %d, freq = %dMHz, status = 0x%08X [0x%02X/%02X]\n",
count, intel_rps_read_actual_frequency(>->rps), status,
REG_FIELD_GET(GS_BOOTROM_MASK, status),
REG_FIELD_GET(GS_UKERNEL_MASK, status));
}
after = ktime_get();
delta = ktime_sub(after, before);
delta_ms = ktime_to_ms(delta); if (ret || !success) {
u32 ukernel = REG_FIELD_GET(GS_UKERNEL_MASK, status);
u32 bootrom = REG_FIELD_GET(GS_BOOTROM_MASK, status);
switch (bootrom) { case INTEL_BOOTROM_STATUS_NO_KEY_FOUND:
guc_info(guc, "invalid key requested, header = 0x%08X\n",
intel_uncore_read(uncore, GUC_HEADER_INFO));
ret = -ENOEXEC; break;
case INTEL_BOOTROM_STATUS_RSA_FAILED:
guc_info(guc, "firmware signature verification failed\n");
ret = -ENOEXEC; break;
case INTEL_BOOTROM_STATUS_PROD_KEY_CHECK_FAILURE:
guc_info(guc, "firmware production part check failure\n");
ret = -ENOEXEC; break;
}
switch (ukernel) { case INTEL_GUC_LOAD_STATUS_EXCEPTION:
guc_info(guc, "firmware exception. EIP: %#x\n",
intel_uncore_read(uncore, SOFT_SCRATCH(13)));
ret = -ENXIO; break;
case INTEL_GUC_LOAD_STATUS_INIT_MMIO_SAVE_RESTORE_INVALID:
guc_info(guc, "illegal register in save/restore workaround list\n");
ret = -EPERM; break;
case INTEL_GUC_LOAD_STATUS_KLV_WORKAROUND_INIT_ERROR:
guc_info(guc, "invalid w/a KLV entry\n");
ret = -EINVAL; break;
case INTEL_GUC_LOAD_STATUS_HWCONFIG_START:
guc_info(guc, "still extracting hwconfig table.\n");
ret = -ETIMEDOUT; break;
}
/* Uncommon/unexpected error, see earlier status code print for details */ if (ret == 0)
ret = -ENXIO;
} elseif (delta_ms > 200) {
guc_warn(guc, "excessive init time: %lldms! [status = 0x%08X, count = %d, ret = %d]\n",
delta_ms, status, count, ret);
guc_warn(guc, "excessive init time: [freq = %dMHz -> %dMHz vs %dMHz, perf_limit_reasons = 0x%08X]\n",
before_freq, intel_rps_read_actual_frequency(>->rps),
intel_rps_get_requested_frequency(>->rps),
intel_uncore_read(uncore, intel_gt_perf_limit_reasons_reg(gt)));
} else {
guc_dbg(guc, "init took %lldms, freq = %dMHz -> %dMHz vs %dMHz, status = 0x%08X, count = %d, ret = %d\n",
delta_ms, before_freq, intel_rps_read_actual_frequency(>->rps),
intel_rps_get_requested_frequency(>->rps), status, count, ret);
}
return ret;
}
/** * intel_guc_fw_upload() - load GuC uCode to device * @guc: intel_guc structure * * Called from intel_uc_init_hw() during driver load, resume from sleep and * after a GPU reset. * * The firmware image should have already been fetched into memory, so only * check that fetch succeeded, and then transfer the image to the h/w. * * Return: non-zero code on error
*/ int intel_guc_fw_upload(struct intel_guc *guc)
{ struct intel_gt *gt = guc_to_gt(guc); struct intel_uncore *uncore = gt->uncore; int ret;
guc_prepare_xfer(gt);
/* * Note that GuC needs the CSS header plus uKernel code to be copied * by the DMA engine in one operation, whereas the RSA signature is * loaded separately, either by copying it to the UOS_RSA_SCRATCH * register (if key size <= 256) or through a ggtt-pinned vma (if key * size > 256). The RSA size and therefore the way we provide it to the * HW is fixed for each platform and hard-coded in the bootrom.
*/
ret = guc_xfer_rsa(&guc->fw, uncore); if (ret) goto out;
/* * Current uCode expects the code to be loaded at 8k; locations below * this are used for the stack.
*/
ret = intel_uc_fw_upload(&guc->fw, 0x2000, UOS_MOVE); if (ret) goto out;
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