Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Suraj Kandpal | 1186 | 95.88% | 9 | 50.00% |
Jani Nikula | 41 | 3.31% | 5 | 27.78% |
Janusz Krzysztofik | 3 | 0.24% | 1 | 5.56% |
Tvrtko A. Ursulin | 3 | 0.24% | 1 | 5.56% |
Ville Syrjälä | 2 | 0.16% | 1 | 5.56% |
Jonathan Cavitt | 2 | 0.16% | 1 | 5.56% |
Total | 1237 | 18 |
// SPDX-License-Identifier: MIT /* * Copyright 2023, Intel Corporation. */ #include <drm/intel/i915_hdcp_interface.h> #include "gem/i915_gem_region.h" #include "gt/intel_gt.h" #include "gt/uc/intel_gsc_uc_heci_cmd_submit.h" #include "i915_drv.h" #include "i915_utils.h" #include "intel_hdcp_gsc.h" #include "intel_hdcp_gsc_message.h" struct intel_hdcp_gsc_message { struct i915_vma *vma; void *hdcp_cmd_in; void *hdcp_cmd_out; }; bool intel_hdcp_gsc_cs_required(struct drm_i915_private *i915) { return DISPLAY_VER(i915) >= 14; } bool intel_hdcp_gsc_check_status(struct drm_i915_private *i915) { struct intel_gt *gt = i915->media_gt; struct intel_gsc_uc *gsc = gt ? >->uc.gsc : NULL; if (!gsc || !intel_uc_fw_is_running(&gsc->fw)) { drm_dbg_kms(&i915->drm, "GSC components required for HDCP2.2 are not ready\n"); return false; } return true; } /*This function helps allocate memory for the command that we will send to gsc cs */ static int intel_hdcp_gsc_initialize_message(struct drm_i915_private *i915, struct intel_hdcp_gsc_message *hdcp_message) { struct intel_gt *gt = i915->media_gt; struct drm_i915_gem_object *obj = NULL; struct i915_vma *vma = NULL; void *cmd_in, *cmd_out; int err; /* allocate object of two page for HDCP command memory and store it */ obj = i915_gem_object_create_shmem(i915, 2 * PAGE_SIZE); if (IS_ERR(obj)) { drm_err(&i915->drm, "Failed to allocate HDCP streaming command!\n"); return PTR_ERR(obj); } cmd_in = i915_gem_object_pin_map_unlocked(obj, intel_gt_coherent_map_type(gt, obj, true)); if (IS_ERR(cmd_in)) { drm_err(&i915->drm, "Failed to map gsc message page!\n"); err = PTR_ERR(cmd_in); goto out_unpin; } cmd_out = cmd_in + PAGE_SIZE; vma = i915_vma_instance(obj, >->ggtt->vm, NULL); if (IS_ERR(vma)) { err = PTR_ERR(vma); goto out_unmap; } err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH); if (err) goto out_unmap; memset(cmd_in, 0, obj->base.size); hdcp_message->hdcp_cmd_in = cmd_in; hdcp_message->hdcp_cmd_out = cmd_out; hdcp_message->vma = vma; return 0; out_unmap: i915_gem_object_unpin_map(obj); out_unpin: i915_gem_object_put(obj); return err; } static const struct i915_hdcp_ops gsc_hdcp_ops = { .initiate_hdcp2_session = intel_hdcp_gsc_initiate_session, .verify_receiver_cert_prepare_km = intel_hdcp_gsc_verify_receiver_cert_prepare_km, .verify_hprime = intel_hdcp_gsc_verify_hprime, .store_pairing_info = intel_hdcp_gsc_store_pairing_info, .initiate_locality_check = intel_hdcp_gsc_initiate_locality_check, .verify_lprime = intel_hdcp_gsc_verify_lprime, .get_session_key = intel_hdcp_gsc_get_session_key, .repeater_check_flow_prepare_ack = intel_hdcp_gsc_repeater_check_flow_prepare_ack, .verify_mprime = intel_hdcp_gsc_verify_mprime, .enable_hdcp_authentication = intel_hdcp_gsc_enable_authentication, .close_hdcp_session = intel_hdcp_gsc_close_session, }; static int intel_hdcp_gsc_hdcp2_init(struct drm_i915_private *i915) { struct intel_hdcp_gsc_message *hdcp_message; int ret; hdcp_message = kzalloc(sizeof(*hdcp_message), GFP_KERNEL); if (!hdcp_message) return -ENOMEM; /* * NOTE: No need to lock the comp mutex here as it is already * going to be taken before this function called */ i915->display.hdcp.hdcp_message = hdcp_message; ret = intel_hdcp_gsc_initialize_message(i915, hdcp_message); if (ret) drm_err(&i915->drm, "Could not initialize hdcp_message\n"); return ret; } static void intel_hdcp_gsc_free_message(struct drm_i915_private *i915) { struct intel_hdcp_gsc_message *hdcp_message = i915->display.hdcp.hdcp_message; hdcp_message->hdcp_cmd_in = NULL; hdcp_message->hdcp_cmd_out = NULL; i915_vma_unpin_and_release(&hdcp_message->vma, I915_VMA_RELEASE_MAP); kfree(hdcp_message); } int intel_hdcp_gsc_init(struct drm_i915_private *i915) { struct i915_hdcp_arbiter *data; int ret; data = kzalloc(sizeof(struct i915_hdcp_arbiter), GFP_KERNEL); if (!data) return -ENOMEM; mutex_lock(&i915->display.hdcp.hdcp_mutex); i915->display.hdcp.arbiter = data; i915->display.hdcp.arbiter->hdcp_dev = i915->drm.dev; i915->display.hdcp.arbiter->ops = &gsc_hdcp_ops; ret = intel_hdcp_gsc_hdcp2_init(i915); mutex_unlock(&i915->display.hdcp.hdcp_mutex); return ret; } void intel_hdcp_gsc_fini(struct drm_i915_private *i915) { intel_hdcp_gsc_free_message(i915); kfree(i915->display.hdcp.arbiter); } static int intel_gsc_send_sync(struct drm_i915_private *i915, struct intel_gsc_mtl_header *header_in, struct intel_gsc_mtl_header *header_out, u64 addr_in, u64 addr_out, size_t msg_out_len) { struct intel_gt *gt = i915->media_gt; int ret; ret = intel_gsc_uc_heci_cmd_submit_packet(>->uc.gsc, addr_in, header_in->message_size, addr_out, msg_out_len + sizeof(*header_out)); if (ret) { drm_err(&i915->drm, "failed to send gsc HDCP msg (%d)\n", ret); return ret; } /* * Checking validity marker and header status to see if some error has * blocked us from sending message to gsc cs */ if (header_out->validity_marker != GSC_HECI_VALIDITY_MARKER) { drm_err(&i915->drm, "invalid validity marker\n"); return -EINVAL; } if (header_out->status != 0) { drm_err(&i915->drm, "header status indicates error %d\n", header_out->status); return -EINVAL; } if (header_out->flags & GSC_OUTFLAG_MSG_PENDING) { header_in->gsc_message_handle = header_out->gsc_message_handle; return -EAGAIN; } return 0; } /* * This function can now be used for sending requests and will also handle * receipt of reply messages hence no different function of message retrieval * is required. We will initialize intel_hdcp_gsc_message structure then add * gsc cs memory header as stated in specs after which the normal HDCP payload * will follow */ ssize_t intel_hdcp_gsc_msg_send(struct drm_i915_private *i915, u8 *msg_in, size_t msg_in_len, u8 *msg_out, size_t msg_out_len) { struct intel_gt *gt = i915->media_gt; struct intel_gsc_mtl_header *header_in, *header_out; const size_t max_msg_size = PAGE_SIZE - sizeof(*header_in); struct intel_hdcp_gsc_message *hdcp_message; u64 addr_in, addr_out, host_session_id; u32 reply_size, msg_size_in, msg_size_out; int ret, tries = 0; if (!intel_uc_uses_gsc_uc(>->uc)) return -ENODEV; if (msg_in_len > max_msg_size || msg_out_len > max_msg_size) return -ENOSPC; msg_size_in = msg_in_len + sizeof(*header_in); msg_size_out = msg_out_len + sizeof(*header_out); hdcp_message = i915->display.hdcp.hdcp_message; header_in = hdcp_message->hdcp_cmd_in; header_out = hdcp_message->hdcp_cmd_out; addr_in = i915_ggtt_offset(hdcp_message->vma); addr_out = addr_in + PAGE_SIZE; memset(header_in, 0, msg_size_in); memset(header_out, 0, msg_size_out); get_random_bytes(&host_session_id, sizeof(u64)); intel_gsc_uc_heci_cmd_emit_mtl_header(header_in, HECI_MEADDRESS_HDCP, msg_size_in, host_session_id); memcpy(hdcp_message->hdcp_cmd_in + sizeof(*header_in), msg_in, msg_in_len); /* * Keep sending request in case the pending bit is set no need to add * message handle as we are using same address hence loc. of header is * same and it will contain the message handle. we will send the message * 20 times each message 50 ms apart */ do { ret = intel_gsc_send_sync(i915, header_in, header_out, addr_in, addr_out, msg_out_len); /* Only try again if gsc says so */ if (ret != -EAGAIN) break; msleep(50); } while (++tries < 20); if (ret) goto err; /* we use the same mem for the reply, so header is in the same loc */ reply_size = header_out->message_size - sizeof(*header_out); if (reply_size > msg_out_len) { drm_warn(&i915->drm, "caller with insufficient HDCP reply size %u (%d)\n", reply_size, (u32)msg_out_len); reply_size = msg_out_len; } else if (reply_size != msg_out_len) { drm_dbg_kms(&i915->drm, "caller unexpected HCDP reply size %u (%d)\n", reply_size, (u32)msg_out_len); } memcpy(msg_out, hdcp_message->hdcp_cmd_out + sizeof(*header_out), msg_out_len); err: return ret; }
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