From: Dafna Hirschfeld <dafna.hirschfeld@collabora.com> To: linux-media@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Alexandre Courbot <acourbot@chromium.org>, dafna.hirschfeld@collabora.com, kernel@collabora.com, Enric Balletbo i Serra <enric.balletbo@collabora.com>, dafna3@gmail.com, tiffany.lin@mediatek.com, andrew-ct.chen@mediatek.com, minghsiu.tsai@mediatek.com, houlong.wei@mediatek.com, mchehab@kernel.org, matthias.bgg@gmail.com, hverkuil@xs4all.nl Subject: [PATCH v4] media: mtk-vpu: Ensure alignment of 8 for DTCM buffer Date: Mon, 20 Sep 2021 19:04:08 +0200 [thread overview] Message-ID: <20210920170408.1561-1-dafna.hirschfeld@collabora.com> (raw) From: Alexandre Courbot <acourbot@chromium.org> When running memcpy_toio: memcpy_toio(send_obj->share_buf, buf, len); it was found that errors appear if len is not a multiple of 8: [58.350841] mtk-mdp 14001000.rdma: processing failed: -22 This patch ensures the copy of a multiple of 8 size by calling round_up(len, 8) when copying Fixes: e6599adfad30 ("media: mtk-vpu: avoid unaligned access to DTCM buffer.") Signed-off-by: Alexandre Courbot <acourbot@chromium.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com> Reviewed-by: Houlong Wei <houlong.wei@mediatek.com> --- changes since v3: 1. multile -> multiple 2. add inline doc changes since v2: 1. do the extra copy only if len is not multiple of 8 changes since v1: 1. change sign-off-by tags 2. change values to memset drivers/media/platform/mtk-vpu/mtk_vpu.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c index ec290dde59cf..1df031716c8f 100644 --- a/drivers/media/platform/mtk-vpu/mtk_vpu.c +++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c @@ -349,7 +349,20 @@ int vpu_ipi_send(struct platform_device *pdev, } } while (vpu_cfg_readl(vpu, HOST_TO_VPU)); - memcpy_toio(send_obj->share_buf, buf, len); + /* + * when copying data to the vpu hardware, the memcpy_toio operation must copy + * a multiple of 8. Otherwise the processing fails + */ + if (len % 8 != 0) { + unsigned char data[SHARE_BUF_SIZE]; + + memset(data + len, 0, sizeof(data) - len); + memcpy(data, buf, len); + memcpy_toio(send_obj->share_buf, data, round_up(len, 8)); + } else { + memcpy_toio(send_obj->share_buf, buf, len); + } + writel(len, &send_obj->len); writel(id, &send_obj->id); -- 2.17.1 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek
WARNING: multiple messages have this Message-ID (diff)
From: Dafna Hirschfeld <dafna.hirschfeld@collabora.com> To: linux-media@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Alexandre Courbot <acourbot@chromium.org>, dafna.hirschfeld@collabora.com, kernel@collabora.com, Enric Balletbo i Serra <enric.balletbo@collabora.com>, dafna3@gmail.com, tiffany.lin@mediatek.com, andrew-ct.chen@mediatek.com, minghsiu.tsai@mediatek.com, houlong.wei@mediatek.com, mchehab@kernel.org, matthias.bgg@gmail.com, hverkuil@xs4all.nl Subject: [PATCH v4] media: mtk-vpu: Ensure alignment of 8 for DTCM buffer Date: Mon, 20 Sep 2021 19:04:08 +0200 [thread overview] Message-ID: <20210920170408.1561-1-dafna.hirschfeld@collabora.com> (raw) From: Alexandre Courbot <acourbot@chromium.org> When running memcpy_toio: memcpy_toio(send_obj->share_buf, buf, len); it was found that errors appear if len is not a multiple of 8: [58.350841] mtk-mdp 14001000.rdma: processing failed: -22 This patch ensures the copy of a multiple of 8 size by calling round_up(len, 8) when copying Fixes: e6599adfad30 ("media: mtk-vpu: avoid unaligned access to DTCM buffer.") Signed-off-by: Alexandre Courbot <acourbot@chromium.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com> Reviewed-by: Houlong Wei <houlong.wei@mediatek.com> --- changes since v3: 1. multile -> multiple 2. add inline doc changes since v2: 1. do the extra copy only if len is not multiple of 8 changes since v1: 1. change sign-off-by tags 2. change values to memset drivers/media/platform/mtk-vpu/mtk_vpu.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c index ec290dde59cf..1df031716c8f 100644 --- a/drivers/media/platform/mtk-vpu/mtk_vpu.c +++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c @@ -349,7 +349,20 @@ int vpu_ipi_send(struct platform_device *pdev, } } while (vpu_cfg_readl(vpu, HOST_TO_VPU)); - memcpy_toio(send_obj->share_buf, buf, len); + /* + * when copying data to the vpu hardware, the memcpy_toio operation must copy + * a multiple of 8. Otherwise the processing fails + */ + if (len % 8 != 0) { + unsigned char data[SHARE_BUF_SIZE]; + + memset(data + len, 0, sizeof(data) - len); + memcpy(data, buf, len); + memcpy_toio(send_obj->share_buf, data, round_up(len, 8)); + } else { + memcpy_toio(send_obj->share_buf, buf, len); + } + writel(len, &send_obj->len); writel(id, &send_obj->id); -- 2.17.1
next reply other threads:[~2021-09-20 17:04 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-09-20 17:04 Dafna Hirschfeld [this message] 2021-09-20 17:04 ` [PATCH v4] media: mtk-vpu: Ensure alignment of 8 for DTCM buffer Dafna Hirschfeld 2021-10-04 9:37 ` Hans Verkuil 2021-10-04 9:37 ` Hans Verkuil 2021-10-18 1:16 ` Alexandre Courbot 2021-10-18 1:16 ` Alexandre Courbot 2021-10-18 7:07 ` Dafna Hirschfeld 2021-10-18 7:07 ` Dafna Hirschfeld 2021-11-03 8:03 ` houlong wei 2021-11-03 8:03 ` houlong wei 2021-11-03 9:19 ` Irui Wang 2021-11-03 9:19 ` Irui Wang 2021-11-03 11:04 ` Dafna Hirschfeld 2021-11-03 11:04 ` Dafna Hirschfeld 2021-11-09 8:46 ` Dafna Hirschfeld 2021-11-09 8:46 ` Dafna Hirschfeld 2021-11-10 3:11 ` Irui Wang 2021-11-10 3:11 ` Irui Wang 2021-11-29 8:11 ` Dafna Hirschfeld 2021-11-29 8:11 ` Dafna Hirschfeld 2021-11-29 14:39 ` Dafna Hirschfeld 2021-11-29 14:39 ` Dafna Hirschfeld 2021-12-06 7:23 ` Alexandre Courbot 2021-12-06 7:23 ` Alexandre Courbot 2022-02-15 9:41 ` AngeloGioacchino Del Regno 2022-02-15 9:41 ` AngeloGioacchino Del Regno
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20210920170408.1561-1-dafna.hirschfeld@collabora.com \ --to=dafna.hirschfeld@collabora.com \ --cc=acourbot@chromium.org \ --cc=andrew-ct.chen@mediatek.com \ --cc=dafna3@gmail.com \ --cc=enric.balletbo@collabora.com \ --cc=houlong.wei@mediatek.com \ --cc=hverkuil@xs4all.nl \ --cc=kernel@collabora.com \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-media@vger.kernel.org \ --cc=linux-mediatek@lists.infradead.org \ --cc=matthias.bgg@gmail.com \ --cc=mchehab@kernel.org \ --cc=minghsiu.tsai@mediatek.com \ --cc=tiffany.lin@mediatek.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.