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Tue, 16 Jul 2024 03:30:39 +0000 Message-ID: Date: Tue, 16 Jul 2024 09:00:29 +0530 User-Agent: Mozilla Thunderbird Subject: [PATCH v5 5/5] firmware: imx: adds miscdev To: Pankaj Gupta , Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Rob Herring Cc: "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "imx@lists.linux.dev" , "linux-arm-kernel@lists.infradead.org" References: <20240712-imx-se-if-v5-0-66a79903a872@nxp.com> <20240712-imx-se-if-v5-5-66a79903a872@nxp.com> <90430412-438a-4403-95cd-3e8553122282@marvell.com> Content-Language: en-US From: Amit Singh Tomar In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: PN3PR01CA0038.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c01:98::6) To MW4PR18MB5084.namprd18.prod.outlook.com (2603:10b6:303:1a7::8) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MW4PR18MB5084:EE_|CH4PR18MB6264:EE_ X-MS-Office365-Filtering-Correlation-Id: cd714eff-213e-49de-39f5-08dca547a9fa X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|1800799024|366016|921020; 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The character device file descriptors >> > + /dev/_mu*_ch* are the interface between userspace NXP's >> secure- >> > + enclave shared library and the kernel driver. >> > + >> > + The ioctl(2)-based ABI is defined and documented in >> > + [include]. >> > + ioctl(s) are used primarily for: >> > + - shared memory management >> > + - allocation of I/O buffers >> > + - getting mu info >> > + - setting a dev-ctx as receiver to receive all the commands from >> FW >> > + - getting SoC info >> > + - send command and receive command response >> > + >> > + The following file operations are supported: >> > + >> > + open(2) >> > + Currently the only useful flags are O_RDWR. >> > + >> > + read(2) >> > + Every read() from the opened character device context is waiting on >> > + wait_event_interruptible, that gets set by the registered mailbox >> callback >> > + function, indicating a message received from the firmware on >> message- >> > + unit. >> > + >> > + write(2) >> > + Every write() to the opened character device context needs to >> acquire >> > + mailbox_lock before sending message on to the message unit. >> > + >> > + close(2) >> > + Stops and frees up the I/O contexts that were associated >> > + with the file descriptor. >> > + >> > +Users: >> https://urldefense.proofpoint.com/v2/url?u=https-3A__eur01.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Furldef&d=DwIFAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=V_GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A-JKU&m=irs9uaMkZhrBGwocSQHnF3oPtWbcHMxKGUrMqKRCEPlpxSwXEjtvRG6tSZIgZpdP&s=tlWEfCGEI9rQKPNa6Hqtp12aeU3xAt52L_W8G0a_gns&e= >> ense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__github.com_nxp- >> 2Dimx_imx-2Dsecure- >> 2Denclave.git%26d%3DDwICaQ%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r% >> 3DV_GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A-JKU%26m%3D3B5Yr- >> 4HUlH7ooyxfcf- >> aduiDYoo4kM4RS1h04NEzdn8QxoJjMviHugQtMh04YXm%26s%3DA4zE7ce- >> kjpGZKtsRrqZiqW7asUowcGapT0QWWzWW3k%26e%3D&data=05%7C02%7 >> Cpankaj.gupta%40nxp.com%7C209a9f8fa717476622e308dca49f4664%7C6 >> 86ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63856625120882519 >> 7%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMz >> IiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=%2F%2FHN >> V%2F%2FlYkPyoKDXFYvd47oIeKHTR7rnwtgz%2FYm4Szg%3D&reserved=0 >> >> efense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__github.com_nxp- >> 2Dimx_imx-2Dsecure- >> 2Denclave.git%26d%3DDwICaQ%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r% >> 3DV_GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A-JKU%26m%3D3B5Yr- >> 4HUlH7ooyxfcf- >> aduiDYoo4kM4RS1h04NEzdn8QxoJjMviHugQtMh04YXm%26s%3DA4zE7ce- >> kjpGZKtsRrqZiqW7asUowcGapT0QWWzWW3k%26e%3D&data=05%7C02%7 >> Cpankaj.gupta%40nxp.com%7C209a9f8fa717476622e308dca49f4664%7C6 >> 86ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63856625120882963 >> 1%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMz >> IiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=Qyd5KBGqb >> 78IHjvFQmAyJlq5YSbbViboRTLl0IyGxzg%3D&reserved=0>, >> > + >> https://urldefense.proofpoint.com/v2/url?u=https-3A__eur01.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Furldef&d=DwIFAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=V_GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A-JKU&m=irs9uaMkZhrBGwocSQHnF3oPtWbcHMxKGUrMqKRCEPlpxSwXEjtvRG6tSZIgZpdP&s=tlWEfCGEI9rQKPNa6Hqtp12aeU3xAt52L_W8G0a_gns&e= >> ense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__github.com_nxp- >> 2Dimx_imx- >> 2Dsmw.git%26d%3DDwICaQ%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r%3D >> V_GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A-JKU%26m%3D3B5Yr- >> 4HUlH7ooyxfcf- >> aduiDYoo4kM4RS1h04NEzdn8QxoJjMviHugQtMh04YXm%26s%3DT2WGFwK >> VpY19AaCUWWaSX7SllYLFZ6bFKZspKqc2Nuw%26e%3D&data=05%7C02%7 >> Cpankaj.gupta%40nxp.com%7C209a9f8fa717476622e308dca49f4664%7C6 >> 86ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63856625120883392 >> 8%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMz >> IiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=%2FzaGw% >> 2BcCV%2F%2FMUA1tdxVNhwE0avSM18wIriqH1%2FMoohQ%3D&reserved= >> 0 >> >> efense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__github.com_nxp- >> 2Dimx_imx- >> 2Dsmw.git%26d%3DDwICaQ%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r%3D >> V_GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A-JKU%26m%3D3B5Yr- >> 4HUlH7ooyxfcf- >> aduiDYoo4kM4RS1h04NEzdn8QxoJjMviHugQtMh04YXm%26s%3DT2WGFwK >> VpY19AaCUWWaSX7SllYLFZ6bFKZspKqc2Nuw%26e%3D&data=05%7C02%7 >> Cpankaj.gupta%40nxp.com%7C209a9f8fa717476622e308dca49f4664%7C6 >> 86ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63856625120883820 >> 8%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMz >> IiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=7EHPHbB5Y >> XpDKVGIjHAyj8X1Kr1Gjba%2FcrwQPYgvP2k%3D&reserved=0> >> > + crypto/skcipher, >> > + drivers/nvmem/imx-ocotp-ele.c >> > diff --git a/drivers/firmware/imx/ele_common.c >> b/drivers/firmware/imx/ele_common.c >> > index b2be32550e9b..88169cd8f369 100644 >> > --- a/drivers/firmware/imx/ele_common.c >> > +++ b/drivers/firmware/imx/ele_common.c >> > @@ -78,6 +78,149 @@ int ele_msg_send_rcv(struct se_if_priv *priv, void >> *tx_msg, void *rx_msg) >> > return err; >> > } >> > >> > +int ele_miscdev_msg_rcv(struct se_if_device_ctx *dev_ctx, >> > + void *rx_buf, >> > + int rx_buf_sz) >> > +{ >> > + struct se_msg_hdr *header; >> > + int err; >> > + >> > + err = wait_event_interruptible(dev_ctx->wq, dev_ctx->pending_hdr != 0); >> > + if (err) { >> > + dev_err(dev_ctx->dev, >> > + "%s: Err[0x%x]:Interrupted by signal.\n", >> > + dev_ctx->miscdev.name, err); >> > + goto exit; >> > + } >> > + >> > + header = (struct se_msg_hdr *) dev_ctx->temp_resp; >> > + >> > + if (header->tag == dev_ctx->priv->rsp_tag) { >> > + if (dev_ctx->priv->waiting_rsp_dev && dev_ctx->priv- >> >waiting_rsp_dev != dev_ctx) { >> > + dev_warn(dev_ctx->dev, >> > + "Dev-ctx waiting for response mismatch (%s != %s).\n", >> > + dev_ctx->miscdev.name, dev_ctx->priv->waiting_rsp_dev- >> >miscdev.name); >> > + err = -EPERM; >> > + goto exit; >> > + } >> > + } >> > + >> > + dev_dbg(dev_ctx->dev, >> > + "%s: %s %s\n", >> > + dev_ctx->miscdev.name, >> > + __func__, >> > + "message received, start transmit to user"); >> > + >> > + /* >> > + * Check that the size passed as argument is larger than >> > + * the one carried in the message. >> > + * >> > + * In case of US-command/response, the dev_ctx->temp_resp_size >> > + * is set before sending the command. >> > + * >> > + * In case of NVM Slave-command/response, the dev_ctx- >> >temp_resp_size >> > + * is set after receing the message from mailbox. >> > + */ >> > + if (dev_ctx->temp_resp_size > rx_buf_sz) { >> > + dev_err(dev_ctx->dev, >> > + "%s: User buffer too small (%d < %d)\n", >> > + dev_ctx->miscdev.name, >> > + rx_buf_sz, dev_ctx->temp_resp_size); >> > + dev_ctx->temp_resp_size = rx_buf_sz; >> > + } >> > + >> > + /* We may need to copy the output data to user before >> > + * delivering the completion message. >> > + */ >> > + err = se_dev_ctx_cpy_out_data(dev_ctx, true); >> > + if (err < 0) >> > + goto exit; >> > + >> > + /* Copy data from the buffer */ >> > + print_hex_dump_debug("to user ", DUMP_PREFIX_OFFSET, 4, 4, >> > + dev_ctx->temp_resp, dev_ctx->temp_resp_size, false); >> > + if (copy_to_user(rx_buf, dev_ctx->temp_resp, dev_ctx- >> >temp_resp_size)) { >> > + dev_err(dev_ctx->dev, >> > + "%s: Failed to copy to user\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + goto exit; >> > + } >> > + >> > + err = dev_ctx->temp_resp_size; >> > +exit: >> > + if (err < 0) >> > + se_dev_ctx_cpy_out_data(dev_ctx, false); >> > + >> > + /* free memory allocated on the shared buffers. */ >> > + dev_ctx->secure_mem.pos = 0; >> > + dev_ctx->non_secure_mem.pos = 0; >> > + >> > + dev_ctx->pending_hdr = 0; >> > + se_dev_ctx_shared_mem_cleanup(dev_ctx); >> > + >> > + return err; >> > +} >> > + >> > +int ele_miscdev_msg_send(struct se_if_device_ctx *dev_ctx, >> > + void *tx_msg, int tx_msg_sz) >> > +{ >> > + struct se_if_priv *priv = dev_ctx->priv; >> > + struct se_msg_hdr *header; >> > + u32 size_to_send; >> > + int err; >> > + >> > + header = (struct se_msg_hdr *) tx_msg; >> > + >> > + /* >> > + * Check that the size passed as argument matches the size >> > + * carried in the message. >> > + */ >> > + size_to_send = header->size << 2; >> > + >> > + if (size_to_send != tx_msg_sz) { >> > + err = -EINVAL; >> > + dev_err(priv->dev, >> > + "%s: User buf hdr(0x%x) sz mismatced with input-sz >> (%d != %d).\n", >> > + dev_ctx->miscdev.name, *(u32 *)header, size_to_send, >> tx_msg_sz); >> > + goto exit; >> > + } >> > + >> > + /* Check the message is valid according to tags */ >> > + if (header->tag == priv->rsp_tag) { >> > + /* Check the device context can send the command */ >> > + if (dev_ctx != priv->cmd_receiver_dev) { >> > + dev_err(priv->dev, >> > + "%s: Channel not configured to send resp to FW.", >> > + dev_ctx->miscdev.name); >> > + err = -EPERM; >> > + goto exit; >> > + } >> > + } else if (header->tag == priv->cmd_tag) { >> > + if (priv->waiting_rsp_dev != dev_ctx) { >> > + dev_err(priv->dev, >> > + "%s: Channel not configured to send cmd to FW.", >> > + dev_ctx->miscdev.name); >> > + err = -EPERM; >> > + goto exit; >> > + } >> > + lockdep_assert_held(&priv->se_if_cmd_lock); >> >> nit: Placement of this call is bit unusual (or do have some reason to >> it), it might be better to place it at the beginning of the function. > > The command lock is taken only in the case of command-message. Hence it placed under check for command message. I thought lockdep_assert_held was used to ensure that ele_miscdev_msg_send is called while holding a lock, but I'm still not clear on why it's placed here. > >> >> > + } else { >> > + dev_err(priv->dev, >> > + "%s: The message does not have a valid TAG\n", >> > + dev_ctx->miscdev.name); >> > + err = -EINVAL; >> > + goto exit; >> > + } >> > + err = ele_msg_send(priv, tx_msg); >> > + if (err < 0) >> > + goto exit; >> > + >> > + err = size_to_send; >> > +exit: >> > + return err; >> > +} >> > + >> > static bool exception_for_size(struct se_if_priv *priv, >> > struct se_msg_hdr *header) >> > { >> > @@ -99,6 +242,7 @@ static bool exception_for_size(struct se_if_priv *priv, >> > void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg) >> > { >> > struct device *dev = mbox_cl->dev; >> > + struct se_if_device_ctx *dev_ctx; >> > struct se_if_priv *priv; >> > struct se_msg_hdr *header; >> > u32 rx_msg_sz; >> > @@ -114,8 +258,50 @@ void se_if_rx_callback(struct mbox_client >> *mbox_cl, void *msg) >> > header = msg; >> > rx_msg_sz = header->size << 2; >> > >> > - if (header->tag == priv->rsp_tag) { >> > - if (!priv->waiting_rsp_dev) { >> > + /* Incoming command: wake up the receiver if any. */ >> > + if (header->tag == priv->cmd_tag) { >> > + dev_dbg(dev, "Selecting cmd receiver\n"); >> > + dev_ctx = priv->cmd_receiver_dev; >> > + /* Pre-allocated buffer of MAX_NVM_MSG_LEN >> > + * as the NVM command are initiated by FW. >> > + * Size is revealed as part of this call function. >> > + */ >> > + if (rx_msg_sz > MAX_NVM_MSG_LEN) { >> > + dev_err(dev, >> > + "%s: Msg recvd hdr(0x%x) with greater[%d] than allocated >> buf-sz.\n", >> > + dev_ctx->miscdev.name, >> > + *(u32 *) header, >> > + rx_msg_sz); >> > + } else >> > + memcpy(dev_ctx->temp_resp, msg, rx_msg_sz); >> > + >> > + /* NVM buffer size are not known prior receiving it from FW. >> > + */ >> > + dev_ctx->temp_resp_size = rx_msg_sz; >> > + >> > + /* Allow user to read */ >> > + dev_ctx->pending_hdr = 1; >> > + wake_up_interruptible(&dev_ctx->wq); >> > + >> > + return; >> > + } else if (header->tag == priv->rsp_tag) { >> > + if (priv->waiting_rsp_dev) { >> > + dev_dbg(dev, "Selecting rsp waiter\n"); >> > + dev_ctx = priv->waiting_rsp_dev; >> > + if (rx_msg_sz != dev_ctx->temp_resp_size >> > + && !exception_for_size(priv, header)) >> > + dev_err(dev, >> > + "%s: Msg RSP hdr(0x%x) with different sz(%d != %d).\n", >> > + dev_ctx->miscdev.name, >> > + *(u32 *) header, >> > + rx_msg_sz, dev_ctx->temp_resp_size); >> > + else >> > + memcpy(dev_ctx->temp_resp, msg, rx_msg_sz); >> > + >> > + /* Allow user to read */ >> > + dev_ctx->pending_hdr = 1; >> > + wake_up_interruptible(&dev_ctx->wq); >> > + } else { >> > /* >> > * Reading the EdgeLock Enclave response >> > * to the command, sent by other >> > @@ -132,8 +318,8 @@ void se_if_rx_callback(struct mbox_client *mbox_cl, >> void *msg) >> > >> > complete(&priv->done); >> > spin_unlock(&priv->lock); >> > - return; >> > } >> > + return; >> > } >> > >> > dev_err(dev, "Failed to select a device for message: %.8x\n", >> > diff --git a/drivers/firmware/imx/ele_common.h >> b/drivers/firmware/imx/ele_common.h >> > index 5ef775a42ab3..7b1c6bfc138b 100644 >> > --- a/drivers/firmware/imx/ele_common.h >> > +++ b/drivers/firmware/imx/ele_common.h >> > @@ -17,6 +17,10 @@ uint32_t se_add_msg_crc(uint32_t *msg, uint32_t >> msg_len); >> > int ele_msg_rcv(struct se_if_priv *priv); >> > int ele_msg_send(struct se_if_priv *priv, void *tx_msg); >> > int ele_msg_send_rcv(struct se_if_priv *priv, void *tx_msg, void *rx_msg); >> > +int ele_miscdev_msg_rcv(struct se_if_device_ctx *dev_ctx, >> > + void *rx_msg, int rx_msg_sz); >> > +int ele_miscdev_msg_send(struct se_if_device_ctx *dev_ctx, >> > + void *tx_msg, int tx_msg_sz); >> > void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg); >> > int se_val_rsp_hdr_n_status(struct se_if_priv *priv, >> > struct se_msg_hdr *header, >> > diff --git a/drivers/firmware/imx/se_ctrl.c b/drivers/firmware/imx/se_ctrl.c >> > index a844794d2b39..8fb2af0f0dd3 100644 >> > --- a/drivers/firmware/imx/se_ctrl.c >> > +++ b/drivers/firmware/imx/se_ctrl.c >> > @@ -23,6 +23,7 @@ >> > #include >> > #include >> > #include >> > +#include >> > >> > #include "ele_base_msg.h" >> > #include "ele_common.h" >> > @@ -196,6 +197,608 @@ static int se_soc_info(struct se_if_priv *priv, >> > return 0; >> > } >> > >> > +static int se_ioctl_cmd_snd_rcv_rsp_handler(struct se_if_device_ctx >> *dev_ctx, >> > + u64 arg) >> > +{ >> > + struct se_if_priv *priv = dev_get_drvdata(dev_ctx->dev); >> > + struct se_ioctl_cmd_snd_rcv_rsp_info cmd_snd_rcv_rsp_info; >> > + struct se_api_msg *tx_msg __free(kfree) = NULL; >> > + struct se_api_msg *rx_msg __free(kfree) = NULL; >> > + int err = 0; >> > + >> > + if (copy_from_user(&cmd_snd_rcv_rsp_info, (u8 *)arg, >> > + sizeof(cmd_snd_rcv_rsp_info))) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed to copy cmd_snd_rcv_rsp_info from user\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + goto exit; >> > + } >> > + >> > + if (cmd_snd_rcv_rsp_info.tx_buf_sz < SE_MU_HDR_SZ) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: User buffer too small(%d < %d)\n", >> > + dev_ctx->miscdev.name, >> > + cmd_snd_rcv_rsp_info.tx_buf_sz, >> > + SE_MU_HDR_SZ); >> > + err = -ENOSPC; >> > + goto exit; >> > + } >> > + >> > + rx_msg = kzalloc(cmd_snd_rcv_rsp_info.rx_buf_sz, GFP_KERNEL); >> > + if (!rx_msg) { >> > + err = -ENOMEM; >> > + goto exit; >> > + } >> > + >> > + tx_msg = memdup_user(cmd_snd_rcv_rsp_info.tx_buf, >> > + cmd_snd_rcv_rsp_info.tx_buf_sz); >> > + if (IS_ERR(tx_msg)) { >> > + err = PTR_ERR(tx_msg); >> > + goto exit; >> > + } >> > + >> > + if (tx_msg->header.tag != priv->cmd_tag) { >> > + err = -EINVAL; >> > + goto exit; >> > + } >> > + >> > + scoped_guard(mutex, &priv->se_if_cmd_lock); >> > + priv->waiting_rsp_dev = dev_ctx; >> > + dev_ctx->temp_resp_size = cmd_snd_rcv_rsp_info.rx_buf_sz; >> > + >> > + /* Device Context that is assigned to be a >> > + * FW's command receiver, has pre-allocated buffer. >> > + */ >> > + if (dev_ctx != priv->cmd_receiver_dev) >> > + dev_ctx->temp_resp = rx_msg; >> > + >> > + err = ele_miscdev_msg_send(dev_ctx, >> > + tx_msg, >> > + cmd_snd_rcv_rsp_info.tx_buf_sz); >> > + if (err < 0) >> > + goto exit; >> > + >> > + cmd_snd_rcv_rsp_info.tx_buf_sz = err; >> > + >> > + err = ele_miscdev_msg_rcv(dev_ctx, >> > + cmd_snd_rcv_rsp_info.rx_buf, >> > + cmd_snd_rcv_rsp_info.rx_buf_sz); >> > + >> > + if (err < 0) >> > + goto exit; >> > + >> > + cmd_snd_rcv_rsp_info.rx_buf_sz = err; >> > + >> > +exit: >> > + dev_ctx->temp_resp_size = 0; >> > + priv->waiting_rsp_dev = NULL; >> > + if (dev_ctx != priv->cmd_receiver_dev) >> > + dev_ctx->temp_resp = NULL; >> > + >> > + if (copy_to_user((void *)arg, &cmd_snd_rcv_rsp_info, >> > + sizeof(cmd_snd_rcv_rsp_info))) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed to copy cmd_snd_rcv_rsp_info from user\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + } >> > + return err; >> > +} >> > + >> > +/* >> > + * File operations for user-space >> > + */ >> > + >> > +/* Write a message to the MU. */ >> > +static ssize_t se_if_fops_write(struct file *fp, const char __user *buf, >> > + size_t size, loff_t *ppos) >> > +{ >> > + struct se_api_msg *tx_msg __free(kfree) = NULL; >> > + struct se_if_device_ctx *dev_ctx; >> > + struct se_if_priv *priv; >> > + int err; >> > + >> > + dev_ctx = container_of(fp->private_data, >> > + struct se_if_device_ctx, >> > + miscdev); >> > + priv = dev_ctx->priv; >> > + dev_dbg(priv->dev, >> > + "%s: write from buf (%p)%zu, ppos=%lld\n", >> > + dev_ctx->miscdev.name, >> > + buf, size, ((ppos) ? *ppos : 0)); >> > + >> > + if (down_interruptible(&dev_ctx->fops_lock)) >> > + return -EBUSY; >> > + >> > + if (dev_ctx->status != SE_IF_CTX_OPENED) { >> > + err = -EINVAL; >> > + goto exit; >> > + } >> > + >> > + if (size < SE_MU_HDR_SZ) { >> > + dev_err(priv->dev, >> > + "%s: User buffer too small(%zu < %d)\n", >> > + dev_ctx->miscdev.name, >> > + size, SE_MU_HDR_SZ); >> > + err = -ENOSPC; >> > + goto exit; >> > + } >> > + tx_msg = memdup_user(buf, size); >> > + if (IS_ERR(tx_msg)) { >> > + err = PTR_ERR(tx_msg); >> > + goto exit; >> > + } >> > + >> > + print_hex_dump_debug("from user ", DUMP_PREFIX_OFFSET, 4, 4, >> > + tx_msg, size, false); >> > + >> > + err = ele_miscdev_msg_send(dev_ctx, tx_msg, size); >> > + >> > +exit: >> > + up(&dev_ctx->fops_lock); >> > + return err; >> > +} >> > + >> > +/* >> > + * Read a message from the MU. >> > + * Blocking until a message is available. >> > + */ >> > +static ssize_t se_if_fops_read(struct file *fp, char __user *buf, >> > + size_t size, loff_t *ppos) >> > +{ >> > + struct se_if_device_ctx *dev_ctx; >> > + struct se_if_priv *priv; >> > + int err; >> > + >> > + dev_ctx = container_of(fp->private_data, >> > + struct se_if_device_ctx, >> > + miscdev); >> > + priv = dev_ctx->priv; >> > + dev_dbg(priv->dev, >> > + "%s: read to buf %p(%zu), ppos=%lld\n", >> > + dev_ctx->miscdev.name, >> > + buf, size, ((ppos) ? *ppos : 0)); >> > + >> > + if (down_interruptible(&dev_ctx->fops_lock)) >> > + return -EBUSY; >> > + >> > + if (dev_ctx->status != SE_IF_CTX_OPENED) { >> > + err = -EINVAL; >> > + goto exit; >> > + } >> > + >> > + err = ele_miscdev_msg_rcv(dev_ctx, buf, size); >> > + >> > +exit: >> > + up(&dev_ctx->fops_lock); >> > + return err; >> > +} >> > + >> > +static int se_ioctl_get_mu_info(struct se_if_device_ctx *dev_ctx, >> > + u64 arg) >> > +{ >> > + struct se_if_priv *priv = dev_get_drvdata(dev_ctx->dev); >> > + struct se_if_node_info *if_node_info; >> > + struct se_ioctl_get_if_info info; >> > + int err = 0; >> > + >> > + if_node_info = (struct se_if_node_info *)priv->info; >> > + >> > + info.se_if_id = if_node_info->se_if_id; >> > + info.interrupt_idx = 0; >> > + info.tz = 0; >> > + info.did = if_node_info->se_if_did; >> > + info.cmd_tag = if_node_info->cmd_tag; >> > + info.rsp_tag = if_node_info->rsp_tag; >> > + info.success_tag = if_node_info->success_tag; >> > + info.base_api_ver = if_node_info->base_api_ver; >> > + info.fw_api_ver = if_node_info->fw_api_ver; >> > + >> > + dev_dbg(priv->dev, >> > + "%s: info [se_if_id: %d, irq_idx: %d, tz: 0x%x, did: 0x%x]\n", >> > + dev_ctx->miscdev.name, >> > + info.se_if_id, info.interrupt_idx, info.tz, info.did); >> > + >> > + if (copy_to_user((u8 *)arg, &info, sizeof(info))) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed to copy mu info to user\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + goto exit; >> > + } >> > + >> > +exit: >> > + return err; >> > +} >> > + >> > +/* Need to copy the output data to user-device context. >> > + */ >> > +int se_dev_ctx_cpy_out_data(struct se_if_device_ctx *dev_ctx, bool >> do_cpy) >> > +{ >> > + struct se_buf_desc *b_desc, *temp; >> > + >> > + list_for_each_entry_safe(b_desc, temp, &dev_ctx->pending_out, link) { >> > + if (b_desc->usr_buf_ptr && b_desc->shared_buf_ptr && do_cpy) { >> > + >> > + dev_dbg(dev_ctx->dev, >> > + "%s: Copy output data to user\n", >> > + dev_ctx->miscdev.name); >> > + if (copy_to_user(b_desc->usr_buf_ptr, >> > + b_desc->shared_buf_ptr, >> > + b_desc->size)) { >> > + dev_err(dev_ctx->dev, >> > + "%s: Failure copying output data to user.", >> > + dev_ctx->miscdev.name); >> > + return -EFAULT; >> > + } >> > + } >> > + >> > + if (b_desc->shared_buf_ptr) >> > + memset(b_desc->shared_buf_ptr, 0, b_desc->size); >> > + >> > + list_del(&b_desc->link); >> > + kfree(b_desc); >> > + } >> > + return 0; >> > +} >> > + >> > +/* >> > + * Clean the used Shared Memory space, >> > + * whether its Input Data copied from user buffers, or >> > + * Data received from FW. >> > + */ >> > +void se_dev_ctx_shared_mem_cleanup(struct se_if_device_ctx *dev_ctx) >> > +{ >> > + struct list_head *dev_ctx_lists[] = {&dev_ctx->pending_in, >> > + &dev_ctx->pending_out}; >> > + struct se_buf_desc *b_desc, *temp; >> > + int i; >> > + >> > + for (i = 0; i < 2; i++) { >> > + list_for_each_entry_safe(b_desc, temp, >> > + dev_ctx_lists[i], link) { >> > + >> > + if (b_desc->shared_buf_ptr) >> > + memset(b_desc->shared_buf_ptr, 0, b_desc->size); >> > + >> > + list_del(&b_desc->link); >> > + kfree(b_desc); >> > + } >> > + } >> > +} >> > + >> > +/* >> > + * Copy a buffer of data to/from the user and return the address to use in >> > + * messages >> > + */ >> > +static int se_ioctl_setup_iobuf_handler(struct se_if_device_ctx *dev_ctx, >> > + u64 arg) >> > +{ >> > + struct se_shared_mem *shared_mem = NULL; >> > + struct se_ioctl_setup_iobuf io = {0}; >> > + struct se_buf_desc *b_desc = NULL; >> > + int err = 0; >> > + u32 pos; >> > + >> > + if (copy_from_user(&io, (u8 *)arg, sizeof(io))) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed copy iobuf config from user\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + goto exit; >> > + } >> > + >> > + dev_dbg(dev_ctx->priv->dev, >> > + "%s: io [buf: %p(%d) flag: %x]\n", >> > + dev_ctx->miscdev.name, >> > + io.user_buf, io.length, io.flags); >> > + >> > + if (io.length == 0 || !io.user_buf) { >> > + /* >> > + * Accept NULL pointers since some buffers are optional >> > + * in FW commands. In this case we should return 0 as >> > + * pointer to be embedded into the message. >> > + * Skip all data copy part of code below. >> > + */ >> > + io.ele_addr = 0; >> > + goto copy; >> > + } >> > + >> > + /* Select the shared memory to be used for this buffer. */ >> > + if (io.flags & SE_MU_IO_FLAGS_USE_SEC_MEM) { >> > + /* App requires to use secure memory for this buffer.*/ >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed allocate SEC MEM memory\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + goto exit; >> > + } else { >> > + /* No specific requirement for this buffer. */ >> > + shared_mem = &dev_ctx->non_secure_mem; >> > + } >> > + >> > + /* Check there is enough space in the shared memory. */ >> > + if (shared_mem->size < shared_mem->pos || >> > + round_up(io.length, 8u) >= (shared_mem->size - shared_mem- >> >pos)) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Not enough space in shared memory\n", >> > + dev_ctx->miscdev.name); >> > + err = -ENOMEM; >> > + goto exit; >> > + } >> > + >> > + /* Allocate space in shared memory. 8 bytes aligned. */ >> > + pos = shared_mem->pos; >> > + shared_mem->pos += round_up(io.length, 8u); >> > + io.ele_addr = (u64)shared_mem->dma_addr + pos; >> > + >> > + if ((io.flags & SE_MU_IO_FLAGS_USE_SEC_MEM) && >> > + !(io.flags & SE_MU_IO_FLAGS_USE_SHORT_ADDR)) { >> > + /*Add base address to get full address.*/ >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed allocate SEC MEM memory\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + goto exit; >> > + } >> > + >> > + memset(shared_mem->ptr + pos, 0, io.length); >> > + if ((io.flags & SE_IO_BUF_FLAGS_IS_INPUT) || >> > + (io.flags & SE_IO_BUF_FLAGS_IS_IN_OUT)) { >> > + /* >> > + * buffer is input: >> > + * copy data from user space to this allocated buffer. >> > + */ >> > + if (copy_from_user(shared_mem->ptr + pos, io.user_buf, >> > + io.length)) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed copy data to shared memory\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + goto exit; >> > + } >> > + } >> > + >> > + b_desc = kzalloc(sizeof(*b_desc), GFP_KERNEL); >> > + if (!b_desc) { >> > + err = -ENOMEM; >> > + goto exit; >> > + } >> > + >> > +copy: >> > + /* Provide the EdgeLock Enclave address to user space only if success.*/ >> > + if (copy_to_user((u8 *)arg, &io, sizeof(io))) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed to copy iobuff setup to user\n", >> > + dev_ctx->miscdev.name); >> > + kfree(b_desc); >> > + err = -EFAULT; >> > + goto exit; >> > + } >> > + >> > + if (b_desc) { >> > + b_desc->shared_buf_ptr = shared_mem->ptr + pos; >> > + b_desc->usr_buf_ptr = io.user_buf; >> > + b_desc->size = io.length; >> > + >> > + if (io.flags & SE_IO_BUF_FLAGS_IS_INPUT) { >> > + /* >> > + * buffer is input: >> > + * add an entry in the "pending input buffers" list so >> > + * that copied data can be cleaned from shared memory >> > + * later. >> > + */ >> > + list_add_tail(&b_desc->link, &dev_ctx->pending_in); >> > + } else { >> > + /* >> > + * buffer is output: >> > + * add an entry in the "pending out buffers" list so data >> > + * can be copied to user space when receiving Secure-Enclave >> > + * response. >> > + */ >> > + list_add_tail(&b_desc->link, &dev_ctx->pending_out); >> > + } >> > + } >> > + >> > +exit: >> > + return err; >> > +} >> > + >> > +/* IOCTL to provide SoC information */ >> > +static int se_ioctl_get_se_soc_info_handler(struct se_if_device_ctx >> *dev_ctx, >> > + u64 arg) >> > +{ >> > + const struct se_if_node_info_list *info_list; >> > + struct se_ioctl_get_soc_info soc_info; >> > + int err = -EINVAL; >> > + >> > + info_list = device_get_match_data(dev_ctx->priv->dev); >> > + if (!info_list) >> > + goto exit; >> > + >> > + soc_info.soc_id = info_list->soc_id; >> > + soc_info.soc_rev = dev_ctx->priv->soc_rev; >> > + >> > + err = (int)copy_to_user((u8 *)arg, (u8 *)(&soc_info), sizeof(soc_info)); >> > + if (err) { >> > + dev_err(dev_ctx->priv->dev, >> > + "%s: Failed to copy soc info to user\n", >> > + dev_ctx->miscdev.name); >> > + err = -EFAULT; >> > + goto exit; >> > + } >> > + >> > +exit: >> > + return err; >> > +} >> > + >> > +/* Open a character device. */ >> > +static int se_if_fops_open(struct inode *nd, struct file *fp) >> > +{ >> > + struct se_if_device_ctx *dev_ctx = container_of(fp->private_data, >> > + struct se_if_device_ctx, >> > + miscdev); >> > + int err = 0; >> > + >> > + /* Avoid race if opened at the same time */ >> > + if (down_trylock(&dev_ctx->fops_lock)) >> > + return -EBUSY; >> > + >> > + /* Authorize only 1 instance. */ >> > + if (dev_ctx->status != SE_IF_CTX_FREE) { >> > + err = -EBUSY; >> > + goto exit; >> > + } >> > + >> > + /* >> > + * Allocate some memory for data exchanges with S40x. >> > + * This will be used for data not requiring secure memory. >> > + */ >> > + dev_ctx->non_secure_mem.ptr = dmam_alloc_coherent(dev_ctx->dev, >> > + MAX_DATA_SIZE_PER_USER, >> > + &dev_ctx->non_secure_mem.dma_addr, >> > + GFP_KERNEL); >> > + if (!dev_ctx->non_secure_mem.ptr) { >> > + err = -ENOMEM; >> > + goto exit; >> > + } >> > + >> > + dev_ctx->non_secure_mem.size = MAX_DATA_SIZE_PER_USER; >> > + dev_ctx->non_secure_mem.pos = 0; >> > + dev_ctx->status = SE_IF_CTX_OPENED; >> > + >> > + dev_ctx->pending_hdr = 0; >> > + >> > + goto exit; >> > + >> > + dmam_free_coherent(dev_ctx->priv->dev, MAX_DATA_SIZE_PER_USER, >> > + dev_ctx->non_secure_mem.ptr, >> > + dev_ctx->non_secure_mem.dma_addr); >> > + >> > +exit: >> > + up(&dev_ctx->fops_lock); >> > + return err; >> > +} >> > + >> > +/* Close a character device. */ >> > +static int se_if_fops_close(struct inode *nd, struct file *fp) >> > +{ >> > + struct se_if_device_ctx *dev_ctx = container_of(fp->private_data, >> > + struct se_if_device_ctx, >> > + miscdev); >> > + struct se_if_priv *priv = dev_ctx->priv; >> > + >> > + /* Avoid race if closed at the same time */ >> > + if (down_trylock(&dev_ctx->fops_lock)) >> > + return -EBUSY; >> > + >> > + /* The device context has not been opened */ >> > + if (dev_ctx->status != SE_IF_CTX_OPENED) >> > + goto exit; >> > + >> > + /* check if this device was registered as command receiver. */ >> > + if (priv->cmd_receiver_dev == dev_ctx) { >> > + priv->cmd_receiver_dev = NULL; >> > + kfree(dev_ctx->temp_resp); >> > + } >> > + >> > + /* check if this device was registered as waiting response. */ >> > + if (priv->waiting_rsp_dev == dev_ctx) { >> > + priv->waiting_rsp_dev = NULL; >> > + mutex_unlock(&priv->se_if_cmd_lock); >> > + } >> > + >> > + /* Unmap secure memory shared buffer. */ >> > + if (dev_ctx->secure_mem.ptr) >> > + devm_iounmap(dev_ctx->dev, dev_ctx->secure_mem.ptr); >> > + >> > + dev_ctx->secure_mem.ptr = NULL; >> > + dev_ctx->secure_mem.dma_addr = 0; >> > + dev_ctx->secure_mem.size = 0; >> > + dev_ctx->secure_mem.pos = 0; >> > + >> > + /* Free non-secure shared buffer. */ >> > + dmam_free_coherent(dev_ctx->priv->dev, MAX_DATA_SIZE_PER_USER, >> > + dev_ctx->non_secure_mem.ptr, >> > + dev_ctx->non_secure_mem.dma_addr); >> > + >> > + dev_ctx->non_secure_mem.ptr = NULL; >> > + dev_ctx->non_secure_mem.dma_addr = 0; >> > + dev_ctx->non_secure_mem.size = 0; >> > + dev_ctx->non_secure_mem.pos = 0; >> > + se_dev_ctx_shared_mem_cleanup(dev_ctx); >> > + dev_ctx->status = SE_IF_CTX_FREE; >> > + >> > +exit: >> > + up(&dev_ctx->fops_lock); >> > + return 0; >> > +} >> > + >> > +/* IOCTL entry point of a character device */ >> > +static long se_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) >> > +{ >> > + struct se_if_device_ctx *dev_ctx = container_of(fp->private_data, >> > + struct se_if_device_ctx, >> > + miscdev); >> > + struct se_if_priv *se_if_priv = dev_ctx->priv; >> > + int err = -EINVAL; >> > + >> > + /* Prevent race during change of device context */ >> > + if (down_interruptible(&dev_ctx->fops_lock)) >> > + return -EBUSY; >> > + >> > + switch (cmd) { >> > + case SE_IOCTL_ENABLE_CMD_RCV: >> > + if (!se_if_priv->cmd_receiver_dev) { >> > + err = 0; >> > + se_if_priv->cmd_receiver_dev = dev_ctx; >> > + dev_ctx->temp_resp = kzalloc(MAX_NVM_MSG_LEN, >> GFP_KERNEL); >> > + if (!dev_ctx->temp_resp) >> > + err = -ENOMEM; >> > + } >> > + break; >> > + case SE_IOCTL_GET_MU_INFO: >> > + err = se_ioctl_get_mu_info(dev_ctx, arg); >> > + break; >> > + case SE_IOCTL_SETUP_IOBUF: >> > + err = se_ioctl_setup_iobuf_handler(dev_ctx, arg); >> > + break; >> > + case SE_IOCTL_GET_SOC_INFO: >> > + err = se_ioctl_get_se_soc_info_handler(dev_ctx, arg); >> > + break; >> > + case SE_IOCTL_CMD_SEND_RCV_RSP: >> > + err = se_ioctl_cmd_snd_rcv_rsp_handler(dev_ctx, arg); >> > + break; >> > + >> > + default: >> > + err = -EINVAL; >> > + dev_dbg(se_if_priv->dev, >> > + "%s: IOCTL %.8x not supported\n", >> > + dev_ctx->miscdev.name, >> > + cmd); >> > + } >> > + >> > + up(&dev_ctx->fops_lock); >> > + return (long)err; >> > +} >> > + >> > +/* Char driver setup */ >> > +static const struct file_operations se_if_fops = { >> > + .open = se_if_fops_open, >> > + .owner = THIS_MODULE, >> > + .release = se_if_fops_close, >> > + .unlocked_ioctl = se_ioctl, >> > + .read = se_if_fops_read, >> > + .write = se_if_fops_write, >> > +}; >> > + >> > +/* interface for managed res to unregister a character device */ >> > +static void if_misc_deregister(void *miscdevice) >> > +{ >> > + misc_deregister(miscdevice); >> > +} >> > + >> > /* interface for managed res to free a mailbox channel */ >> > static void if_mbox_free_channel(void *mbox_chan) >> > { >> > @@ -233,6 +836,7 @@ static void se_if_probe_cleanup(struct >> platform_device *pdev) >> > { >> > struct device *dev = &pdev->dev; >> > struct se_if_priv *priv; >> > + int i; >> > >> > priv = dev_get_drvdata(dev); >> > >> > @@ -252,6 +856,17 @@ static void se_if_probe_cleanup(struct >> platform_device *pdev) >> > priv->imem.buf = NULL; >> > } >> > >> > + if (priv->ctxs) { >> > + for (i = 0; i < priv->max_dev_ctx; i++) { >> > + if (priv->ctxs[i]) { >> > + devm_remove_action(dev, >> > + if_misc_deregister, >> > + &priv->ctxs[i]->miscdev); >> > + misc_deregister(&priv->ctxs[i]->miscdev); >> > + } >> > + } >> > + } >> > + >> > /* No need to check, if reserved memory is allocated >> > * before calling for its release. Or clearing the >> > * un-set bit. >> > @@ -259,6 +874,74 @@ static void se_if_probe_cleanup(struct >> platform_device *pdev) >> > of_reserved_mem_device_release(dev); >> > } >> > >> > +static int init_device_context(struct se_if_priv *priv) >> > +{ >> > + const struct se_if_node_info *info = priv->info; >> > + struct se_if_device_ctx *dev_ctx; >> > + u8 *devname; >> > + int ret = 0; >> > + int i; >> > + >> > + priv->ctxs = devm_kzalloc(priv->dev, sizeof(dev_ctx) * priv- >> >max_dev_ctx, >> > + GFP_KERNEL); >> > + >> > + if (!priv->ctxs) { >> > + ret = -ENOMEM; >> > + return ret; >> > + } >> > + >> > + /* Create users */ >> > + for (i = 0; i < priv->max_dev_ctx; i++) { >> > + dev_ctx = devm_kzalloc(priv->dev, sizeof(*dev_ctx), GFP_KERNEL); >> > + if (!dev_ctx) { >> > + ret = -ENOMEM; >> > + return ret; >> > + } >> > + >> > + dev_ctx->dev = priv->dev; >> > + dev_ctx->status = SE_IF_CTX_FREE; >> > + dev_ctx->priv = priv; >> > + >> > + priv->ctxs[i] = dev_ctx; >> > + >> > + /* Default value invalid for an header. */ >> > + init_waitqueue_head(&dev_ctx->wq); >> > + >> > + INIT_LIST_HEAD(&dev_ctx->pending_out); >> > + INIT_LIST_HEAD(&dev_ctx->pending_in); >> > + sema_init(&dev_ctx->fops_lock, 1); >> > + >> > + devname = devm_kasprintf(priv->dev, GFP_KERNEL, "%s_ch%d", >> > + info->se_name, i); >> > + if (!devname) { >> > + ret = -ENOMEM; >> > + return ret; >> > + } >> > + >> > + dev_ctx->miscdev.name = devname; >> > + dev_ctx->miscdev.minor = MISC_DYNAMIC_MINOR; >> > + dev_ctx->miscdev.fops = &se_if_fops; >> > + dev_ctx->miscdev.parent = priv->dev; >> > + ret = misc_register(&dev_ctx->miscdev); >> > + if (ret) { >> > + dev_err(priv->dev, "failed to register misc device %d\n", >> > + ret); >> > + return ret; >> > + } >> > + >> > + ret = devm_add_action(priv->dev, if_misc_deregister, >> > + &dev_ctx->miscdev); >> > + if (ret) { >> > + dev_err(priv->dev, >> > + "failed[%d] to add action to the misc-dev\n", >> > + ret); >> > + return ret; >> > + } >> > + } >> > + >> > + return ret; >> > +} >> > + >> > static void se_load_firmware(const struct firmware *fw, void *context) >> > { >> > struct se_if_priv *priv = (struct se_if_priv *) context; >> > @@ -427,6 +1110,16 @@ static int se_if_probe(struct platform_device >> *pdev) >> > ret = 0; >> > } >> > >> > + if (info->max_dev_ctx) { >> > + ret = init_device_context(priv); >> > + if (ret) { >> > + dev_err(dev, >> > + "Failed[0x%x] to create device contexts.\n", >> > + ret); >> > + goto exit; >> > + } >> > + } >> > + >> > dev_info(dev, "i.MX secure-enclave: %s interface to firmware, >> configured.\n", >> > info->se_name); >> > return ret; >> > @@ -467,6 +1160,10 @@ static int se_resume(struct device *dev) >> > { >> > struct se_if_priv *priv = dev_get_drvdata(dev); >> > const struct se_if_node_info *info = priv->info; >> > + int i; >> > + >> > + for (i = 0; i < priv->max_dev_ctx; i++) >> > + wake_up_interruptible(&priv->ctxs[i]->wq); >> > >> > if (info && info->imem_mgmt) >> > se_restore_imem_state(priv); >> > diff --git a/drivers/firmware/imx/se_ctrl.h b/drivers/firmware/imx/se_ctrl.h >> > index 4be2235d2170..b49346372746 100644 >> > --- a/drivers/firmware/imx/se_ctrl.h >> > +++ b/drivers/firmware/imx/se_ctrl.h >> > @@ -13,15 +13,62 @@ >> > #define MAX_FW_LOAD_RETRIES 50 >> > >> > #define RES_STATUS(x) FIELD_GET(0x000000ff, x) >> > +#define MAX_DATA_SIZE_PER_USER (65 * 1024) >> > +#define MAX_NVM_MSG_LEN (256) >> > #define MESSAGING_VERSION_6 0x6 >> > #define MESSAGING_VERSION_7 0x7 >> > >> > +#define SE_MU_IO_FLAGS_USE_SEC_MEM (0x02u) >> > +#define SE_MU_IO_FLAGS_USE_SHORT_ADDR (0x04u) >> > + >> > struct se_imem_buf { >> > u8 *buf; >> > phys_addr_t phyaddr; >> > u32 size; >> > }; >> > >> > +struct se_buf_desc { >> > + u8 *shared_buf_ptr; >> > + u8 *usr_buf_ptr; >> > + u32 size; >> > + struct list_head link; >> > +}; >> > + >> > +/* Status of a char device */ >> > +enum se_if_dev_ctx_status_t { >> > + SE_IF_CTX_FREE, >> > + SE_IF_CTX_OPENED >> > +}; >> > + >> > +struct se_shared_mem { >> > + dma_addr_t dma_addr; >> > + u32 size; >> > + u32 pos; >> > + u8 *ptr; >> > +}; >> > + >> > +/* Private struct for each char device instance. */ >> > +struct se_if_device_ctx { >> > + struct device *dev; >> > + struct se_if_priv *priv; >> > + struct miscdevice miscdev; >> > + >> > + enum se_if_dev_ctx_status_t status; >> > + wait_queue_head_t wq; >> > + struct semaphore fops_lock; >> > + >> > + u32 pending_hdr; >> > + struct list_head pending_in; >> > + struct list_head pending_out; >> > + >> > + struct se_shared_mem secure_mem; >> > + struct se_shared_mem non_secure_mem; >> > + >> > + struct se_api_msg *temp_resp; >> > + u32 temp_resp_size; >> > + struct notifier_block se_notify; >> > +}; >> > + >> > /* Header of the messages exchange with the EdgeLock Enclave */ >> > struct se_msg_hdr { >> > u8 ver; >> > @@ -80,4 +127,6 @@ struct se_if_priv { >> > struct se_imem_buf imem; >> > }; >> > >> > +int se_dev_ctx_cpy_out_data(struct se_if_device_ctx *dev_ctx, bool >> do_cpy); >> > +void se_dev_ctx_shared_mem_cleanup(struct se_if_device_ctx *dev_ctx); >> > #endif >> > diff --git a/include/uapi/linux/se_ioctl.h b/include/uapi/linux/se_ioctl.h >> > new file mode 100644 >> > index 000000000000..c2d0a92ef626 >> > --- /dev/null >> > +++ b/include/uapi/linux/se_ioctl.h >> > @@ -0,0 +1,94 @@ >> > +/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR BSD-3- >> Clause*/ >> > +/* >> > + * Copyright 2024 NXP >> > + */ >> > + >> > +#ifndef SE_IOCTL_H >> > +#define SE_IOCTL_H >> > + >> > +/* IOCTL definitions. */ >> > + >> > +struct se_ioctl_setup_iobuf { >> > + u8 *user_buf; >> > + u32 length; >> > + u32 flags; >> > + u64 ele_addr; >> > +}; >> > + >> > +struct se_ioctl_shared_mem_cfg { >> > + u32 base_offset; >> > + u32 size; >> > +}; >> > + >> > +struct se_ioctl_get_if_info { >> > + u8 se_if_id; >> > + u8 interrupt_idx; >> > + u8 tz; >> > + u8 did; >> > + u8 cmd_tag; >> > + u8 rsp_tag; >> > + u8 success_tag; >> > + u8 base_api_ver; >> > + u8 fw_api_ver; >> > +}; >> > + >> > +struct se_ioctl_cmd_snd_rcv_rsp_info { >> > + u32 *tx_buf; >> > + int tx_buf_sz; >> > + u32 *rx_buf; >> > + int rx_buf_sz; >> > +}; >> > + >> > +struct se_ioctl_get_soc_info { >> > + u16 soc_id; >> > + u16 soc_rev; >> > +}; >> > + >> > +/* IO Buffer Flags */ >> > +#define SE_IO_BUF_FLAGS_IS_OUTPUT (0x00u) >> > +#define SE_IO_BUF_FLAGS_IS_INPUT (0x01u) >> > +#define SE_IO_BUF_FLAGS_USE_SEC_MEM (0x02u) >> > +#define SE_IO_BUF_FLAGS_USE_SHORT_ADDR (0x04u) >> > +#define SE_IO_BUF_FLAGS_IS_IN_OUT (0x10u) >> > + >> > +/* IOCTLS */ >> > +#define SE_IOCTL 0x0A /* like MISC_MAJOR. */ >> > + >> > +/* >> > + * ioctl to designated the current fd as logical-reciever. >> > + * This is ioctl is send when the nvm-daemon, a slave to the >> > + * firmware is started by the user. >> > + */ >> > +#define SE_IOCTL_ENABLE_CMD_RCV _IO(SE_IOCTL, 0x01) >> > + >> > +/* >> > + * ioctl to get the buffer allocated from the memory, which is shared >> > + * between kernel and FW. >> > + * Post allocation, the kernel tagged the allocated memory with: >> > + * Output >> > + * Input >> > + * Input-Output >> > + * Short address >> > + * Secure-memory >> > + */ >> > +#define SE_IOCTL_SETUP_IOBUF _IOWR(SE_IOCTL, 0x03, \ >> > + struct se_ioctl_setup_iobuf) >> > + >> > +/* >> > + * ioctl to get the mu information, that is used to exchange message >> > + * with FW, from user-spaced. >> > + */ >> > +#define SE_IOCTL_GET_MU_INFO _IOR(SE_IOCTL, 0x04, \ >> > + struct se_ioctl_get_if_info) >> > +/* >> > + * ioctl to get SoC Info from user-space. >> > + */ >> > +#define SE_IOCTL_GET_SOC_INFO _IOR(SE_IOCTL, 0x06, \ >> > + struct se_ioctl_get_soc_info) >> > + >> > +/* >> > + * ioctl to send command and receive response from user-space. >> > + */ >> > +#define SE_IOCTL_CMD_SEND_RCV_RSP _IOWR(SE_IOCTL, 0x07, \ >> > + struct se_ioctl_cmd_snd_rcv_rsp_info) >> > +#endif >> > >> > -- >> > 2.34.1 >> > >> > >