From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D0E9A2FCA79; Mon, 5 May 2025 22:25:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746483958; cv=none; b=m1cKellGVHLWg/JCF96jSVwxUMo/Ad5HRLuQzQ9yB1WZDeU3fsnHZtv8xJr+Y/teiopRRg//3YpcsQuWt/LaloT2oGrcYliOqZbEz4d+PXt4Y6K11Jusr9XI5y2WWHZmadW1KZVu4mvPHP1mdSsdcuQTV022pwAvaQ4wh67puSM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746483958; c=relaxed/simple; bh=1kVFBF5Km5WKizSO08Xy/7gQngJUmOZ7T0h0aO7IcfU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=nkXK82aY9xz8ULLipV9yo/e/oRnHfuYTn9qj8+rCgPvkJdGle4lh7aYWXBbadoZHJDUkKIX77N0QueSyMG/fKWGufrnZW7r49UyTUmWwVMhwlYI6hyxN3sotvQc1jy36C13akOPqQ+ot1nMC/HoZzmU8jf5moksMNq07pWAVbms= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tzVBTUM5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="tzVBTUM5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B921EC4CEED; Mon, 5 May 2025 22:25:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746483958; bh=1kVFBF5Km5WKizSO08Xy/7gQngJUmOZ7T0h0aO7IcfU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tzVBTUM5YUIzK8VJ9N/bmbaeWXL1yCU97y9fwcUDJn29xEEkSA3ZnQLeOVl3qat/Z VnOBDyJ2287aZquzjiMrK419+XSQK70xhDBaSYhK4TqChssKzbURwYYqXZOpGIWKRu 5zGxf7eZQN4D5hiSYXCDK5VkrVc/KkokjqDgjKTE7jzsBCosM5BYtnpJipCgXRPFcs JoDyuTgPP30hIwjkoo3rMIEcj51zm5wmq/WsZ34mHHeEZbJunVLTekJl04VctTPe+z A8OVS8nCdj82G2fbDbu/8q1kj0XFdsNu37lFJ5gNhN0R6Qq+fv0NN/qyG0HSNQ/6yd jNPSuDY9fEylw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hector Martin , Alyssa Rosenzweig , Sven Peter , Sasha Levin , j@jannau.net, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 6.14 291/642] soc: apple: rtkit: Implement OSLog buffers properly Date: Mon, 5 May 2025 18:08:27 -0400 Message-Id: <20250505221419.2672473-291-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505221419.2672473-1-sashal@kernel.org> References: <20250505221419.2672473-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.14.5 Content-Transfer-Encoding: 8bit From: Hector Martin [ Upstream commit a06398687065e0c334dc5fc4d2778b5b87292e43 ] Apparently nobody can figure out where the old logic came from, but it seems like it has never been actually used on any supported firmware to this day. OSLog buffers were apparently never requested. But starting with 13.3, we actually need this implemented properly for MTP (and later AOP) to work, so let's actually do that. Signed-off-by: Hector Martin Reviewed-by: Alyssa Rosenzweig Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-2-c3ec37f9021b@svenpeter.dev Signed-off-by: Sven Peter Signed-off-by: Sasha Levin --- drivers/soc/apple/rtkit-internal.h | 1 + drivers/soc/apple/rtkit.c | 56 ++++++++++++++++++------------ 2 files changed, 35 insertions(+), 22 deletions(-) diff --git a/drivers/soc/apple/rtkit-internal.h b/drivers/soc/apple/rtkit-internal.h index 27c9fa745fd52..b8d5244678f01 100644 --- a/drivers/soc/apple/rtkit-internal.h +++ b/drivers/soc/apple/rtkit-internal.h @@ -44,6 +44,7 @@ struct apple_rtkit { struct apple_rtkit_shmem ioreport_buffer; struct apple_rtkit_shmem crashlog_buffer; + struct apple_rtkit_shmem oslog_buffer; struct apple_rtkit_shmem syslog_buffer; char *syslog_msg_buffer; diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c index 00d59a81db88b..45ccbe2cbcd63 100644 --- a/drivers/soc/apple/rtkit.c +++ b/drivers/soc/apple/rtkit.c @@ -66,8 +66,9 @@ enum { #define APPLE_RTKIT_SYSLOG_MSG_SIZE GENMASK_ULL(31, 24) #define APPLE_RTKIT_OSLOG_TYPE GENMASK_ULL(63, 56) -#define APPLE_RTKIT_OSLOG_INIT 1 -#define APPLE_RTKIT_OSLOG_ACK 3 +#define APPLE_RTKIT_OSLOG_BUFFER_REQUEST 1 +#define APPLE_RTKIT_OSLOG_SIZE GENMASK_ULL(55, 36) +#define APPLE_RTKIT_OSLOG_IOVA GENMASK_ULL(35, 0) #define APPLE_RTKIT_MIN_SUPPORTED_VERSION 11 #define APPLE_RTKIT_MAX_SUPPORTED_VERSION 12 @@ -251,15 +252,21 @@ static int apple_rtkit_common_rx_get_buffer(struct apple_rtkit *rtk, struct apple_rtkit_shmem *buffer, u8 ep, u64 msg) { - size_t n_4kpages = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_SIZE, msg); u64 reply; int err; + /* The different size vs. IOVA shifts look odd but are indeed correct this way */ + if (ep == APPLE_RTKIT_EP_OSLOG) { + buffer->size = FIELD_GET(APPLE_RTKIT_OSLOG_SIZE, msg); + buffer->iova = FIELD_GET(APPLE_RTKIT_OSLOG_IOVA, msg) << 12; + } else { + buffer->size = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_SIZE, msg) << 12; + buffer->iova = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_IOVA, msg); + } + buffer->buffer = NULL; buffer->iomem = NULL; buffer->is_mapped = false; - buffer->iova = FIELD_GET(APPLE_RTKIT_BUFFER_REQUEST_IOVA, msg); - buffer->size = n_4kpages << 12; dev_dbg(rtk->dev, "RTKit: buffer request for 0x%zx bytes at %pad\n", buffer->size, &buffer->iova); @@ -284,11 +291,21 @@ static int apple_rtkit_common_rx_get_buffer(struct apple_rtkit *rtk, } if (!buffer->is_mapped) { - reply = FIELD_PREP(APPLE_RTKIT_SYSLOG_TYPE, - APPLE_RTKIT_BUFFER_REQUEST); - reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_SIZE, n_4kpages); - reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_IOVA, - buffer->iova); + /* oslog uses different fields and needs a shifted IOVA instead of size */ + if (ep == APPLE_RTKIT_EP_OSLOG) { + reply = FIELD_PREP(APPLE_RTKIT_OSLOG_TYPE, + APPLE_RTKIT_OSLOG_BUFFER_REQUEST); + reply |= FIELD_PREP(APPLE_RTKIT_OSLOG_SIZE, buffer->size); + reply |= FIELD_PREP(APPLE_RTKIT_OSLOG_IOVA, + buffer->iova >> 12); + } else { + reply = FIELD_PREP(APPLE_RTKIT_SYSLOG_TYPE, + APPLE_RTKIT_BUFFER_REQUEST); + reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_SIZE, + buffer->size >> 12); + reply |= FIELD_PREP(APPLE_RTKIT_BUFFER_REQUEST_IOVA, + buffer->iova); + } apple_rtkit_send_message(rtk, ep, reply, NULL, false); } @@ -482,25 +499,18 @@ static void apple_rtkit_syslog_rx(struct apple_rtkit *rtk, u64 msg) } } -static void apple_rtkit_oslog_rx_init(struct apple_rtkit *rtk, u64 msg) -{ - u64 ack; - - dev_dbg(rtk->dev, "RTKit: oslog init: msg: 0x%llx\n", msg); - ack = FIELD_PREP(APPLE_RTKIT_OSLOG_TYPE, APPLE_RTKIT_OSLOG_ACK); - apple_rtkit_send_message(rtk, APPLE_RTKIT_EP_OSLOG, ack, NULL, false); -} - static void apple_rtkit_oslog_rx(struct apple_rtkit *rtk, u64 msg) { u8 type = FIELD_GET(APPLE_RTKIT_OSLOG_TYPE, msg); switch (type) { - case APPLE_RTKIT_OSLOG_INIT: - apple_rtkit_oslog_rx_init(rtk, msg); + case APPLE_RTKIT_OSLOG_BUFFER_REQUEST: + apple_rtkit_common_rx_get_buffer(rtk, &rtk->oslog_buffer, + APPLE_RTKIT_EP_OSLOG, msg); break; default: - dev_warn(rtk->dev, "RTKit: Unknown oslog message: %llx\n", msg); + dev_warn(rtk->dev, "RTKit: Unknown oslog message: %llx\n", + msg); } } @@ -710,6 +720,7 @@ int apple_rtkit_reinit(struct apple_rtkit *rtk) apple_rtkit_free_buffer(rtk, &rtk->ioreport_buffer); apple_rtkit_free_buffer(rtk, &rtk->crashlog_buffer); + apple_rtkit_free_buffer(rtk, &rtk->oslog_buffer); apple_rtkit_free_buffer(rtk, &rtk->syslog_buffer); kfree(rtk->syslog_msg_buffer); @@ -890,6 +901,7 @@ void apple_rtkit_free(struct apple_rtkit *rtk) apple_rtkit_free_buffer(rtk, &rtk->ioreport_buffer); apple_rtkit_free_buffer(rtk, &rtk->crashlog_buffer); + apple_rtkit_free_buffer(rtk, &rtk->oslog_buffer); apple_rtkit_free_buffer(rtk, &rtk->syslog_buffer); kfree(rtk->syslog_msg_buffer); -- 2.39.5