| Abdellatif El Khlifi | 4970d5b | 2023-08-04 14:33:41 +0100 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com> |
| 4 | * |
| 5 | * Authors: |
| 6 | * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> |
| 7 | */ |
| 8 | #include <common.h> |
| 9 | #include <arm_ffa.h> |
| 10 | #include <dm.h> |
| 11 | #include <log.h> |
| 12 | #include <asm/global_data.h> |
| 13 | #include <asm/sandbox_arm_ffa_priv.h> |
| 14 | #include <dm/device-internal.h> |
| 15 | #include <linux/errno.h> |
| 16 | |
| 17 | DECLARE_GLOBAL_DATA_PTR; |
| 18 | |
| 19 | /** |
| 20 | * sandbox_ffa_discover() - perform sandbox FF-A discovery |
| 21 | * @dev: The sandbox FF-A bus device |
| 22 | * Try to discover the FF-A framework. Discovery is performed by |
| 23 | * querying the FF-A framework version from secure world using the FFA_VERSION ABI. |
| 24 | * Return: |
| 25 | * |
| 26 | * 0 on success. Otherwise, failure |
| 27 | */ |
| 28 | static int sandbox_ffa_discover(struct udevice *dev) |
| 29 | { |
| 30 | int ret; |
| 31 | struct udevice *emul; |
| 32 | |
| 33 | log_info("Emulated FF-A framework discovery\n"); |
| 34 | |
| 35 | ret = ffa_emul_find(dev, &emul); |
| 36 | if (ret) { |
| 37 | log_err("Cannot find FF-A emulator\n"); |
| 38 | return ret; |
| 39 | } |
| 40 | |
| 41 | ret = ffa_get_version_hdlr(dev); |
| 42 | if (ret) |
| 43 | return ret; |
| 44 | |
| 45 | return 0; |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * sandbox_ffa_probe() - The sandbox FF-A driver probe function |
| 50 | * @dev: the sandbox-arm-ffa device |
| 51 | * Save the emulator device in uc_priv. |
| 52 | * Return: |
| 53 | * |
| 54 | * 0 on success. |
| 55 | */ |
| 56 | static int sandbox_ffa_probe(struct udevice *dev) |
| 57 | { |
| 58 | int ret; |
| 59 | struct ffa_priv *uc_priv = dev_get_uclass_priv(dev); |
| 60 | |
| 61 | ret = uclass_first_device_err(UCLASS_FFA_EMUL, &uc_priv->emul); |
| 62 | if (ret) { |
| 63 | log_err("Cannot find FF-A emulator\n"); |
| 64 | return ret; |
| 65 | } |
| 66 | |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * sandbox_ffa_bind() - The sandbox FF-A driver bind function |
| 72 | * @dev: the sandbox-arm-ffa device |
| 73 | * Try to discover the emulated FF-A bus. |
| 74 | * Return: |
| 75 | * |
| 76 | * 0 on success. |
| 77 | */ |
| 78 | static int sandbox_ffa_bind(struct udevice *dev) |
| 79 | { |
| 80 | int ret; |
| 81 | |
| 82 | ret = sandbox_ffa_discover(dev); |
| 83 | if (ret) |
| 84 | return ret; |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | /* Sandbox Arm FF-A emulator operations */ |
| 90 | |
| 91 | static const struct ffa_bus_ops sandbox_ffa_ops = { |
| 92 | .partition_info_get = ffa_get_partitions_info_hdlr, |
| 93 | .sync_send_receive = ffa_msg_send_direct_req_hdlr, |
| 94 | .rxtx_unmap = ffa_unmap_rxtx_buffers_hdlr, |
| 95 | }; |
| 96 | |
| 97 | static const struct udevice_id sandbox_ffa_id[] = { |
| 98 | { "sandbox,arm-ffa", 0 }, |
| 99 | { }, |
| 100 | }; |
| 101 | |
| 102 | /* Declaring the sandbox FF-A driver under UCLASS_FFA */ |
| 103 | U_BOOT_DRIVER(sandbox_arm_ffa) = { |
| 104 | .name = "sandbox_arm_ffa", |
| 105 | .of_match = sandbox_ffa_id, |
| 106 | .id = UCLASS_FFA, |
| 107 | .bind = sandbox_ffa_bind, |
| 108 | .probe = sandbox_ffa_probe, |
| 109 | .ops = &sandbox_ffa_ops, |
| 110 | }; |