From nobody Tue Nov 26 13:49:46 2024 Received: from out-187.mta0.migadu.com (out-187.mta0.migadu.com [91.218.175.187]) (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 DF7652010EA for ; Fri, 18 Oct 2024 15:01:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.187 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729263675; cv=none; b=ulDSFkO6iBftK/N51fk5pUxF2WAyQBX4msBAzhiDY/JTexHuCG49j8z+YmsXRUtBWxYKWUdTX95GPMMAcBw93CMXxJwNZg3KAiAHQv9f1DCXP9/tVU/OHm/+3lhCXYIE4TfVE2JnBU7vLdN4H0z7Sgdw3iRZEEl/U6A1OBLqovU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729263675; c=relaxed/simple; bh=KXjgRjgViiBPoQ96NpbXV5Lg8af5ZYGzF262rMeCnRk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=D9zvU+6dW/drGQs2STwQBgOOrpHrBFrdmuKP/ptnAkmS1gfknl9sRwn6tjqQ8//F7IcH9lnbnPlN36Ffx1Rb2GQVm2imMPhecEbMxUXC/RThvFJ9KGAj9fkVZMsc0br0dgYc7HnzlP1SPajX13otuALmW5E7f35UOox5Dg9DzGI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=gUFQMugH; arc=none smtp.client-ip=91.218.175.187 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="gUFQMugH" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1729263672; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=K1hpfqv0IHftVKZCYJJVLIjVqOdtAFHDnh0O340ruFg=; b=gUFQMugHKbc35RgKuzv1+0W/jX1DIhYapkZndWqtCsctIFCEMAijSCIMgXI6dkZ0kyk6dX TbG0rVtS+IUTwXzfgOdUr+hzKI2NMWoUZnEtu2jiWgJR2mmduGBGaYu9vDEfVLiu/K+4+P GfI4DNYuvR+polvwwwK+a09aAxH3bC0= From: Sean Anderson To: Christoph Hellwig , iommu@lists.linux.dev Cc: Robin Murphy , linux-trace-kernel@vger.kernel.org, Mathieu Desnoyers , Steven Rostedt , Masami Hiramatsu , Marek Szyprowski , linux-kernel@vger.kernel.org, Sean Anderson Subject: [PATCH v2 3/4] dma-mapping: Use trace_dma_alloc for dma_alloc* instead of using trace_dma_map Date: Fri, 18 Oct 2024 11:00:36 -0400 Message-Id: <20241018150036.2878190-4-sean.anderson@linux.dev> In-Reply-To: <20241018150036.2878190-1-sean.anderson@linux.dev> References: <20241018150036.2878190-1-sean.anderson@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" In some cases, we use trace_dma_map to trace dma_alloc* functions. This generally follows dma_debug. However, this does not record all of the relevant information for allocations, such as GFP flags. Create new dma_alloc tracepoints for these functions. Note that while dma_alloc_noncontiguous may allocate discontiguous pages (from the CPU's point of view), the device will only see one contiguous mapping. Therefore, we just need to trace dma_addr and size. Signed-off-by: Sean Anderson Reviewed-by: Steven Rostedt (Google) --- Changes in v2: - Use macros to define events in a class include/trace/events/dma.h | 99 +++++++++++++++++++++++++++++++++++++- kernel/dma/mapping.c | 10 ++-- 2 files changed, 102 insertions(+), 7 deletions(-) diff --git a/include/trace/events/dma.h b/include/trace/events/dma.h index 267cfa49d9d5..7a9606b8934e 100644 --- a/include/trace/events/dma.h +++ b/include/trace/events/dma.h @@ -112,7 +112,7 @@ DEFINE_EVENT(dma_unmap, name, \ DEFINE_UNMAP_EVENT(dma_unmap_page); DEFINE_UNMAP_EVENT(dma_unmap_resource); =20 -TRACE_EVENT(dma_alloc, +DECLARE_EVENT_CLASS(dma_alloc_class, TP_PROTO(struct device *dev, void *virt_addr, dma_addr_t dma_addr, size_t size, enum dma_data_direction dir, gfp_t flags, unsigned long attrs), @@ -147,7 +147,58 @@ TRACE_EVENT(dma_alloc, decode_dma_attrs(__entry->attrs)) ); =20 -TRACE_EVENT(dma_free, +#define DEFINE_ALLOC_EVENT(name) \ +DEFINE_EVENT(dma_alloc_class, name, \ + TP_PROTO(struct device *dev, void *virt_addr, dma_addr_t dma_addr, \ + size_t size, enum dma_data_direction dir, gfp_t flags, \ + unsigned long attrs), \ + TP_ARGS(dev, virt_addr, dma_addr, size, dir, flags, attrs)) + +DEFINE_ALLOC_EVENT(dma_alloc); +DEFINE_ALLOC_EVENT(dma_alloc_pages); + +TRACE_EVENT(dma_alloc_sgt, + TP_PROTO(struct device *dev, struct sg_table *sgt, size_t size, + enum dma_data_direction dir, gfp_t flags, unsigned long attrs), + TP_ARGS(dev, sgt, size, dir, flags, attrs), + + TP_STRUCT__entry( + __string(device, dev_name(dev)) + __dynamic_array(u64, phys_addrs, sgt->orig_nents) + __field(u64, dma_addr) + __field(size_t, size) + __field(enum dma_data_direction, dir) + __field(gfp_t, flags) + __field(unsigned long, attrs) + ), + + TP_fast_assign( + struct scatterlist *sg; + int i; + + __assign_str(device); + for_each_sg(sgt->sgl, sg, sgt->orig_nents, i) + ((u64 *)__get_dynamic_array(phys_addrs))[i] =3D sg_phys(sg); + __entry->dma_addr =3D sg_dma_address(sgt->sgl); + __entry->size =3D size; + __entry->dir =3D dir; + __entry->flags =3D flags; + __entry->attrs =3D attrs; + ), + + TP_printk("%s dir=3D%s dma_addr=3D%llx size=3D%zu phys_addrs=3D%s flags= =3D%s attrs=3D%s", + __get_str(device), + decode_dma_data_direction(__entry->dir), + __entry->dma_addr, + __entry->size, + __print_array(__get_dynamic_array(phys_addrs), + __get_dynamic_array_len(phys_addrs) / + sizeof(u64), sizeof(u64)), + show_gfp_flags(__entry->flags), + decode_dma_attrs(__entry->attrs)) +); + +DECLARE_EVENT_CLASS(dma_free_class, TP_PROTO(struct device *dev, void *virt_addr, dma_addr_t dma_addr, size_t size, enum dma_data_direction dir, unsigned long attrs), TP_ARGS(dev, virt_addr, dma_addr, size, dir, attrs), @@ -179,6 +230,50 @@ TRACE_EVENT(dma_free, decode_dma_attrs(__entry->attrs)) ); =20 +#define DEFINE_FREE_EVENT(name) \ +DEFINE_EVENT(dma_free_class, name, \ + TP_PROTO(struct device *dev, void *virt_addr, dma_addr_t dma_addr, \ + size_t size, enum dma_data_direction dir, unsigned long attrs), \ + TP_ARGS(dev, virt_addr, dma_addr, size, dir, attrs)) + +DEFINE_FREE_EVENT(dma_free); +DEFINE_FREE_EVENT(dma_free_pages); + +TRACE_EVENT(dma_free_sgt, + TP_PROTO(struct device *dev, struct sg_table *sgt, size_t size, + enum dma_data_direction dir), + TP_ARGS(dev, sgt, size, dir), + + TP_STRUCT__entry( + __string(device, dev_name(dev)) + __dynamic_array(u64, phys_addrs, sgt->orig_nents) + __field(u64, dma_addr) + __field(size_t, size) + __field(enum dma_data_direction, dir) + ), + + TP_fast_assign( + struct scatterlist *sg; + int i; + + __assign_str(device); + for_each_sg(sgt->sgl, sg, sgt->orig_nents, i) + ((u64 *)__get_dynamic_array(phys_addrs))[i] =3D sg_phys(sg); + __entry->dma_addr =3D sg_dma_address(sgt->sgl); + __entry->size =3D size; + __entry->dir =3D dir; + ), + + TP_printk("%s dir=3D%s dma_addr=3D%llx size=3D%zu phys_addrs=3D%s", + __get_str(device), + decode_dma_data_direction(__entry->dir), + __entry->dma_addr, + __entry->size, + __print_array(__get_dynamic_array(phys_addrs), + __get_dynamic_array_len(phys_addrs) / + sizeof(u64), sizeof(u64))) +); + TRACE_EVENT(dma_map_sg, TP_PROTO(struct device *dev, struct scatterlist *sgl, int nents, int ents, enum dma_data_direction dir, unsigned long attrs), diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 944ac835030a..b8a6bc492fae 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -685,8 +685,8 @@ struct page *dma_alloc_pages(struct device *dev, size_t= size, struct page *page =3D __dma_alloc_pages(dev, size, dma_handle, dir, gfp); =20 if (page) { - trace_dma_map_page(dev, page_to_phys(page), *dma_handle, size, - dir, 0); + trace_dma_alloc_pages(dev, page_to_virt(page), *dma_handle, + size, dir, gfp, 0); debug_dma_map_page(dev, page, 0, size, dir, *dma_handle, 0); } return page; @@ -710,7 +710,7 @@ static void __dma_free_pages(struct device *dev, size_t= size, struct page *page, void dma_free_pages(struct device *dev, size_t size, struct page *page, dma_addr_t dma_handle, enum dma_data_direction dir) { - trace_dma_unmap_page(dev, dma_handle, size, dir, 0); + trace_dma_free_pages(dev, page_to_virt(page), dma_handle, size, dir, 0); debug_dma_unmap_page(dev, dma_handle, size, dir); __dma_free_pages(dev, size, page, dma_handle, dir); } @@ -770,7 +770,7 @@ struct sg_table *dma_alloc_noncontiguous(struct device = *dev, size_t size, =20 if (sgt) { sgt->nents =3D 1; - trace_dma_map_sg(dev, sgt->sgl, sgt->orig_nents, 1, dir, attrs); + trace_dma_alloc_sgt(dev, sgt, size, dir, gfp, attrs); debug_dma_map_sg(dev, sgt->sgl, sgt->orig_nents, 1, dir, attrs); } return sgt; @@ -789,7 +789,7 @@ static void free_single_sgt(struct device *dev, size_t = size, void dma_free_noncontiguous(struct device *dev, size_t size, struct sg_table *sgt, enum dma_data_direction dir) { - trace_dma_unmap_sg(dev, sgt->sgl, sgt->orig_nents, dir, 0); + trace_dma_free_sgt(dev, sgt, size, dir); debug_dma_unmap_sg(dev, sgt->sgl, sgt->orig_nents, dir); =20 if (use_dma_iommu(dev)) --=20 2.35.1.1320.gc452695387.dirty