| /* |
| * Copyright 2018 The Hafnium Authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * https://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "hf/spci.h" |
| |
| #include "hf/mm.h" |
| #include "hf/static_assert.h" |
| |
| #include "vmapi/hf/call.h" |
| |
| #include "test/hftest.h" |
| #include "test/vmapi/spci.h" |
| |
| static alignas(PAGE_SIZE) uint8_t send_page[PAGE_SIZE]; |
| static alignas(PAGE_SIZE) uint8_t recv_page[PAGE_SIZE]; |
| static_assert(sizeof(send_page) == PAGE_SIZE, "Send page is not a page."); |
| static_assert(sizeof(recv_page) == PAGE_SIZE, "Recv page is not a page."); |
| |
| static hf_ipaddr_t send_page_addr = (hf_ipaddr_t)send_page; |
| static hf_ipaddr_t recv_page_addr = (hf_ipaddr_t)recv_page; |
| |
| struct mailbox_buffers set_up_mailbox(void) |
| { |
| ASSERT_EQ(spci_rxtx_map(send_page_addr, recv_page_addr).func, |
| SPCI_SUCCESS_32); |
| return (struct mailbox_buffers){ |
| .send = send_page, |
| .recv = recv_page, |
| }; |
| } |
| |
| /* |
| * Helper function to send memory to a VM then send a message with the retrieve |
| * request it needs to retrieve it. |
| */ |
| spci_memory_handle_t send_memory_and_retrieve_request( |
| uint32_t share_func, void *tx_buffer, spci_vm_id_t sender, |
| spci_vm_id_t recipient, |
| struct spci_memory_region_constituent constituents[], |
| uint32_t constituent_count, spci_memory_region_flags_t flags, |
| enum spci_memory_access access) |
| { |
| uint32_t msg_size; |
| struct spci_value ret; |
| uint32_t page_count = 0; |
| uint32_t handle; |
| uint32_t i; |
| |
| /* Send the memory. */ |
| msg_size = spci_memory_region_init( |
| tx_buffer, sender, recipient, constituents, constituent_count, |
| 0, flags, access, SPCI_MEMORY_NORMAL_MEM, |
| SPCI_MEMORY_CACHE_WRITE_BACK, SPCI_MEMORY_OUTER_SHAREABLE); |
| switch (share_func) { |
| case SPCI_MEM_DONATE_32: |
| ret = spci_mem_donate(msg_size, msg_size, 0); |
| break; |
| case SPCI_MEM_LEND_32: |
| ret = spci_mem_lend(msg_size, msg_size, 0); |
| break; |
| case SPCI_MEM_SHARE_32: |
| ret = spci_mem_share(msg_size, msg_size, 0); |
| break; |
| default: |
| FAIL("Invalid share_func %#x.\n", share_func); |
| /* Never reached, but needed to keep clang-analyser happy. */ |
| return 0; |
| } |
| EXPECT_EQ(ret.func, SPCI_SUCCESS_32); |
| handle = spci_mem_success_handle(ret); |
| |
| /* Count pages. */ |
| for (i = 0; i < constituent_count; ++i) { |
| page_count += constituents[i].page_count; |
| } |
| |
| /* |
| * Send the appropriate retrieve request to the VM so that it can use it |
| * to retrieve the memory. |
| */ |
| msg_size = spci_memory_retrieve_request_init( |
| tx_buffer, handle, sender, recipient, share_func, 0, page_count, |
| access, SPCI_MEMORY_NORMAL_MEM, SPCI_MEMORY_CACHE_WRITE_BACK, |
| SPCI_MEMORY_OUTER_SHAREABLE); |
| EXPECT_EQ(spci_msg_send(sender, recipient, msg_size, 0).func, |
| SPCI_SUCCESS_32); |
| |
| return handle; |
| } |
| |
| /* |
| * Use the retrieve request from the recieve buffer to retrieve a memory region |
| * which has been sent to us. Returns the sender, and the handle via a return |
| * parameter. |
| */ |
| spci_vm_id_t retrieve_memory_from_message(void *recv_buf, void *send_buf, |
| struct spci_value msg_ret, |
| spci_memory_handle_t *handle) |
| { |
| uint32_t msg_size; |
| struct spci_value ret; |
| struct spci_retrieved_memory_region *memory_region; |
| spci_vm_id_t sender; |
| |
| EXPECT_EQ(msg_ret.func, SPCI_MSG_SEND_32); |
| msg_size = spci_msg_send_size(msg_ret); |
| sender = spci_msg_send_sender(msg_ret); |
| |
| if (handle != NULL) { |
| struct spci_memory_retrieve_request *retrieve_request = |
| (struct spci_memory_retrieve_request *)recv_buf; |
| *handle = retrieve_request->handle; |
| } |
| memcpy_s(send_buf, HF_MAILBOX_SIZE, recv_buf, msg_size); |
| spci_rx_release(); |
| ret = spci_mem_retrieve_req(msg_size, msg_size, 0); |
| EXPECT_EQ(ret.func, SPCI_MEM_RETRIEVE_RESP_32); |
| memory_region = (struct spci_retrieved_memory_region *)recv_buf; |
| EXPECT_EQ(memory_region->receiver_count, 1); |
| |
| return sender; |
| } |