From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.kundenserver.de (mout.kundenserver.de [217.72.192.74]) (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 714B372 for ; Sun, 11 Jul 2021 10:49:52 +0000 (UTC) Received: from [192.168.1.107] ([37.4.249.97]) by mrelayeu.kundenserver.de (mreue109 [212.227.15.183]) with ESMTPSA (Nemesis) id 1MYvTy-1lgW2q0daS-00UoxR; Sun, 11 Jul 2021 12:49:36 +0200 Subject: Re: [PATCH v3 5/5] staging: vchiq: Combine vchiq platform code into single file To: Ojaswin Mujoo , nsaenz@kernel.org Cc: gregkh@linuxfoundation.org, arnd@arndb.de, dan.carpenter@oracle.com, phil@raspberrypi.com, bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org References: From: Stefan Wahren Autocrypt: addr=stefan.wahren@i2se.com; keydata= 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bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: en-US X-Provags-ID: V03:K1:O5yJPazFMqxnVGQNhEVlXSD2aYpt/ImNzJpUOtFyU2a6jWi9QEk t+Fj0QUV8B2j2eGzSKB5bmglPWFZP7uN6SyTNoc3USzXiUZX4fBQhE8zPzvLdsjYQDQIBGF cVr9TmP1ao5Dc8++NemZfqmajsLfHhNjA8/zS6rJJ0/pwjv1CVRVznP5MvurX6mGqNT8eEb 2hoYR8EB2hO4o0p6+YTYA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:oO0tyG9W/UY=:oqtE0tC2HZgxh0BE5cCg+I egYWy9axVK6MKohn4j/4riizGWxORmngHFubpuPaPYb1jEFhJnY9nuhCkgijuwlim5Ku5mI2z hYPORNRGDsJDEEcFm1fui+PKzEtfPd/kSAzotF45ihCoUfo71zdYZcXkaGtwuLXzyTGg6W0o0 toQ5Mu96ehqNZgac03VNIyzwSVgrFF46HXzeZR6VqctkSWDc4C+sUhrn7Gx/NWtyPbvk09QkM GVbfbg/DFFoWPE++0XRMtwJ7fC+M2wLjwHwZRWOrjLU7mvaZXHGmG9IdRdqt+mSuWmf6E8OU+ iPR5EBTcXqNeEowdtThSKr6XpwjKIA1IZNfZMEcd2JE80oZ0eVJlI18KkABM50mdVTSbJSWRu Gr769tIOGtIQr0nHrbTttfXOccMnSv6UGFpt8hheX8l4thTGs6Nmk0dcBnzTZQ33EesSOCHXy /PeU0i2D+5qrymMPSAmIvFr1VQok3IJVu94OY5DXqYi3T9nK18TszZ1jyYsgFOTU9GS//AXKc YSmiN7BId08zeiXm9GVKGApPkWsOTYDV2KdQ1DBLN6uP33GPAhHaAC/vUlvT8svE3zDPYnsiT +cZJpVtbeveQmFmmYJMiEpx+ni6ZSXALkeibPSWzKYb0fZH85LhqrxoQlx7wVghK/Cs0xwuxC wuIsQC7byBIVPQUwzxGyjBEzjNarPq5j/oPfitK6h764nTLzz5EXjm4CKxg81ErffdaalTyVs zvXLafA+kSK633pQeHzU3nhBBOjRMCuyR1myLhiVHzBH6mAr9n5JOFgWbt3F+1WZbjcLQrVYp 3LHsjEvMo11/WURcrjt4qk0rRnPnzpPYm+HlcE17kpwOGgHg12nHmBoN1Ie3ERIgRoccj2qY5 at79sZG1420n8FIpmGkw== Am 04.07.21 um 17:59 schrieb Ojaswin Mujoo: > Combine the vchiq platform initialization code into a single file by > merging vchiq_2835_arm.c into vchiq_arm.c > > Signed-off-by: Ojaswin Mujoo > --- > drivers/staging/vc04_services/Makefile | 1 - > .../interface/vchiq_arm/vchiq_2835_arm.c | 564 ------------------= > .../interface/vchiq_arm/vchiq_arm.c | 549 +++++++++++++++++ > 3 files changed, 549 insertions(+), 565 deletions(-) > delete mode 100644 drivers/staging/vc04_services/interface/vchiq_arm/v= chiq_2835_arm.c > > diff --git a/drivers/staging/vc04_services/Makefile b/drivers/staging/v= c04_services/Makefile > index 0a04338fc962..1fd191e2e2a5 100644 > --- a/drivers/staging/vc04_services/Makefile > +++ b/drivers/staging/vc04_services/Makefile > @@ -4,7 +4,6 @@ obj-$(CONFIG_BCM2835_VCHIQ) +=3D vchiq.o > vchiq-objs :=3D \ > interface/vchiq_arm/vchiq_core.o \ > interface/vchiq_arm/vchiq_arm.o \ > - interface/vchiq_arm/vchiq_2835_arm.o \ > interface/vchiq_arm/vchiq_debugfs.o \ > interface/vchiq_arm/vchiq_connected.o \ > =20 =2E.. > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ar= m.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c > index 0f2de571eba7..9057d01ffd48 100644 > --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c > +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c > @@ -25,15 +25,32 @@ > #include > #include > #include > +#include > +#include > +#include > #include > =20 > #include "vchiq_core.h" > #include "vchiq_ioctl.h" > #include "vchiq_arm.h" > #include "vchiq_debugfs.h" > +#include "vchiq_connected.h" > +#include "vchiq_pagelist.h" > =20 > #define DEVICE_NAME "vchiq" > =20 > +#define TOTAL_SLOTS (VCHIQ_SLOT_ZERO_SLOTS + 2 * 32) > + > +#define MAX_FRAGMENTS (VCHIQ_NUM_CURRENT_BULKS * 2) > + > +#define VCHIQ_PLATFORM_FRAGMENTS_OFFSET_IDX 0 > +#define VCHIQ_PLATFORM_FRAGMENTS_COUNT_IDX 1 > + > +#define BELL0 0x00 > +#define BELL2 0x08 > + > +#define ARM_DS_ACTIVE BIT(2) > + > /* Override the default prefix, which would be vchiq_arm (from the fil= ename) */ > #undef MODULE_PARAM_PREFIX > #define MODULE_PARAM_PREFIX DEVICE_NAME "." > @@ -59,10 +76,542 @@ static struct vchiq_drvdata bcm2836_drvdata =3D { > .cache_line_size =3D 64, > }; > =20 > +struct vchiq_2835_state { > + int inited; > + struct vchiq_arm_state arm_state; > +}; > + > +struct vchiq_pagelist_info { > + struct pagelist *pagelist; > + size_t pagelist_buffer_size; > + dma_addr_t dma_addr; > + enum dma_data_direction dma_dir; > + unsigned int num_pages; > + unsigned int pages_need_release; > + struct page **pages; > + struct scatterlist *scatterlist; > + unsigned int scatterlist_mapped; > +}; > + > +static void __iomem *g_regs; > +/* This value is the size of the L2 cache lines as understood by the > + * VPU firmware, which determines the required alignment of the > + * offsets/sizes in pagelists. > + * > + * Modern VPU firmware looks for a DT "cache-line-size" property in > + * the VCHIQ node and will overwrite it with the actual L2 cache size,= > + * which the kernel must then respect. That property was rejected > + * upstream, so we have to use the VPU firmware's compatibility value > + * of 32. > + */ > +static unsigned int g_cache_line_size =3D 32; > +static unsigned int g_fragments_size; > +static char *g_fragments_base; > +static char *g_free_fragments; > +static struct semaphore g_free_fragments_sema; > +static struct device *g_dev; > + > +static DEFINE_SEMAPHORE(g_free_fragments_mutex); > + > +static irqreturn_t > +vchiq_doorbell_irq(int irq, void *dev_id); > + > +static struct vchiq_pagelist_info * > +create_pagelist(char *buf, char __user *ubuf, size_t count, unsigned s= hort type); > + > +static void > +free_pagelist(struct vchiq_pagelist_info *pagelistinfo, > + int actual); please no forward declarations of these 3 functions. Put them into the right order instead ... Since this patch is independent from the other ones from the series, maybe Greg can merg the rest of the series.