From patchwork Wed Mar 8 15:25:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kalle Valo X-Patchwork-Id: 661027 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB531C64EC4 for ; Wed, 8 Mar 2023 15:25:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231811AbjCHPZg (ORCPT ); Wed, 8 Mar 2023 10:25:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231929AbjCHPZb (ORCPT ); Wed, 8 Mar 2023 10:25:31 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94C4AC5616 for ; Wed, 8 Mar 2023 07:25:29 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3CB39B81C4D for ; Wed, 8 Mar 2023 15:25:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 22FFBC433D2; Wed, 8 Mar 2023 15:25:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1678289126; bh=SrAq+DDewNQuaVVmmMK7PUrDAUggwmxqEZ7rN80AGB0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WmHjS0oIiOPyujluEn8Xug0isgdipJ4IuIuERhik4Yy6ZdzSGbgndhEIClphaWcXP WSVyZn7T1SsPq0lzOZw0atkDjNJsk06ywjipjHKLxiMuiEiylJtrBcQyxTHtLBpgc0 mOHtHYRcUmLX0ShCxRS6y8Fp9CqXM6InpwbWnuVnyfiWlF8vORdjxYukXETH0boTpv 9twG8gyVretuQ179pispswO8l5IpOGUzvzrcebGZo1I3HbQ+mBTntqC2e2NK0ULrLp UpJZjw+a5rsq/TZOyH4DR6k6ThYGlxkx39T3UZC8SLWaRZwmTkJy5CeN+yizk+baLu DSR7Gq1GsfJ5Q== From: Kalle Valo To: mhi@lists.linux.dev Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org Subject: [PATCH v2 1/3] mhi: allow MHI client drivers to provide the firmware via a pointer Date: Wed, 8 Mar 2023 17:25:20 +0200 Message-Id: <20230308152522.6728-2-kvalo@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230308152522.6728-1-kvalo@kernel.org> References: <20230308152522.6728-1-kvalo@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Kalle Valo Currently MHI loads the firmware image from the path provided by client devices. ath11k needs to support firmware image embedded along with meta data (named as firmware-2.bin). So allow the client driver to request the firmware file from user space on it's own and provide the firmware image data and size to MHI via a pointer struct mhi_controller::fw_data. This is an optional feature, if fw_data is NULL MHI load the firmware using the name from struct mhi_controller::fw_image string as before. Tested with ath11k and WCN6855 hw2.0. Signed-off-by: Kalle Valo --- drivers/bus/mhi/host/boot.c | 28 +++++++++++++++++++--------- include/linux/mhi.h | 6 ++++++ 2 files changed, 25 insertions(+), 9 deletions(-) diff --git a/drivers/bus/mhi/host/boot.c b/drivers/bus/mhi/host/boot.c index 1c69feee1703..5e6e1e340057 100644 --- a/drivers/bus/mhi/host/boot.c +++ b/drivers/bus/mhi/host/boot.c @@ -365,12 +365,10 @@ int mhi_alloc_bhie_table(struct mhi_controller *mhi_cntrl, } static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl, - const struct firmware *firmware, + const u8 *buf, size_t remainder, struct image_info *img_info) { - size_t remainder = firmware->size; size_t to_cpy; - const u8 *buf = firmware->data; struct mhi_buf *mhi_buf = img_info->mhi_buf; struct bhi_vec_entry *bhi_vec = img_info->bhi_vec; @@ -392,9 +390,10 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) const struct firmware *firmware = NULL; struct device *dev = &mhi_cntrl->mhi_dev->dev; const char *fw_name; + const u8 *fw_data; void *buf; dma_addr_t dma_addr; - size_t size; + size_t size, fw_sz; int i, ret; if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) { @@ -424,6 +423,14 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) fw_name = (mhi_cntrl->ee == MHI_EE_EDL) ? mhi_cntrl->edl_image : mhi_cntrl->fw_image; + if (!fw_name && mhi_cntrl->fbc_download && + mhi_cntrl->fw_data && mhi_cntrl->fw_sz) { + size = mhi_cntrl->sbl_size; + fw_data = mhi_cntrl->fw_data; + fw_sz = mhi_cntrl->fw_sz; + goto skip_req_fw; + } + if (!fw_name || (mhi_cntrl->fbc_download && (!mhi_cntrl->sbl_size || !mhi_cntrl->seg_len))) { dev_err(dev, @@ -443,6 +450,10 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) if (size > firmware->size) size = firmware->size; + fw_data = firmware->data; + fw_sz = firmware->size; + +skip_req_fw: buf = dma_alloc_coherent(mhi_cntrl->cntrl_dev, size, &dma_addr, GFP_KERNEL); if (!buf) { @@ -451,7 +462,7 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) } /* Download image using BHI */ - memcpy(buf, firmware->data, size); + memcpy(buf, fw_data, size); ret = mhi_fw_load_bhi(mhi_cntrl, dma_addr, size); dma_free_coherent(mhi_cntrl->cntrl_dev, size, buf, dma_addr); @@ -463,7 +474,7 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) } /* Wait for ready since EDL image was loaded */ - if (fw_name == mhi_cntrl->edl_image) { + if (fw_name && fw_name == mhi_cntrl->edl_image) { release_firmware(firmware); goto fw_load_ready_state; } @@ -477,15 +488,14 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) * device transitioning into MHI READY state */ if (mhi_cntrl->fbc_download) { - ret = mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->fbc_image, - firmware->size); + ret = mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->fbc_image, fw_sz); if (ret) { release_firmware(firmware); goto error_fw_load; } /* Load the firmware into BHIE vec table */ - mhi_firmware_copy(mhi_cntrl, firmware, mhi_cntrl->fbc_image); + mhi_firmware_copy(mhi_cntrl, fw_data, fw_sz, mhi_cntrl->fbc_image); } release_firmware(firmware); diff --git a/include/linux/mhi.h b/include/linux/mhi.h index a5441ad33c74..72eef7309736 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -299,6 +299,10 @@ struct mhi_controller_config { * @iova_start: IOMMU starting address for data (required) * @iova_stop: IOMMU stop address for data (required) * @fw_image: Firmware image name for normal booting (optional) + * @fw_data: Firmware image data content for normal booting, used only + * if fw_image is NULL (optional) + * @fw_sz: Firmware image data size for normal booting, used only if fw_image + * is NULL and fbc_download is true (optional) * @edl_image: Firmware image name for emergency download mode (optional) * @rddm_size: RAM dump size that host should allocate for debugging purpose * @sbl_size: SBL image size downloaded through BHIe (optional) @@ -384,6 +388,8 @@ struct mhi_controller { dma_addr_t iova_start; dma_addr_t iova_stop; const char *fw_image; + const u8 *fw_data; + size_t fw_sz; const char *edl_image; size_t rddm_size; size_t sbl_size;