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[209.132.180.67]) by mx.google.com with ESMTP id g18si14782438pgk.477.2019.06.25.14.03.59; Tue, 25 Jun 2019 14:04:15 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@gmail.com header.s=20161025 header.b=E5N+TG2U; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726223AbfFYU4V (ORCPT + 99 others); Tue, 25 Jun 2019 16:56:21 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:36874 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725290AbfFYUyb (ORCPT ); Tue, 25 Jun 2019 16:54:31 -0400 Received: by mail-pg1-f196.google.com with SMTP id y8so37536pgl.4; Tue, 25 Jun 2019 13:54:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=7GqGJNKIasLUZ24jo+8ov0SucMXFw8AagDpW/9PlO7E=; b=E5N+TG2UKD42ufRtfER2wNK6hWUjGD9iweQETAc6Pv0/FV9nwzLNOqtNKO+VPdHqm4 4jB32B31y5Q9xvQq/peFaRouKEh8069QRsLGTYjbvYGaZGa0INeeqJ2tNmavqbWOaHyH L4AIwIbiqKwy7qkVCU4ADNpfABiPTuHMqRPjvzUoe9ffV5g9WjttmYvR1pijgoAmb2YN PpPkkQcuN5lvHN85K0fbeD49WFhVuEd537bs/PTs/QN/qevIs77OjPIA66mzU6xUqgXr Ufg9ELR/qK3nWrXTQc039/EirjKkab8HB7xGTsIAC0trafA/CXcP3/8swu3sh6jD+tvZ 4+4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=7GqGJNKIasLUZ24jo+8ov0SucMXFw8AagDpW/9PlO7E=; b=FB/QAjoWgm5+fj5/vxfmO4d/XXJrFnyxAXkgLpg75NQuOYUXklqy3fZfC624OgFZK9 aNYmkJBMiRqTaNw8A7t8jQf4licbRcSufwftkRJCmTt7A1Jh0JsRNYIrr8m59RvwW0ZL +mySvVZa19Na1+gB56iaywpcJF6sDjegLJrPMfhA300v6qhHcqmIHmbMh3d2f9NUpTu9 HgYD4wANJDOBWVnUCJdn1N+6HA1Hot1uHHwuWPSUZ2mC2pbXvh84HELizb+ZegR0tUB8 sMtkv0uTcZ2wpYbew4xv64PVXFQpba3jjsOD6fEzPdxRki3RI76gnCsI7zkW09YLaPQB hH0w== X-Gm-Message-State: APjAAAXIrj6qfL+6IyIqt/pqaKZP5z4hk7eCmjJNIpG6auuokFAebghh BsfxSpCKsFVDlAq5hTdrRvQ= X-Received: by 2002:a17:90a:25e6:: with SMTP id k93mr932016pje.100.1561496070866; Tue, 25 Jun 2019 13:54:30 -0700 (PDT) Received: from localhost ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id k22sm17047332pfg.77.2019.06.25.13.54.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 25 Jun 2019 13:54:29 -0700 (PDT) Date: Tue, 25 Jun 2019 13:54:28 -0700 From: Guenter Roeck To: Fredrik Noring Cc: Christoph Hellwig , laurentiu.tudor@nxp.com, stern@rowland.harvard.edu, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, marex@denx.de, leoyang.li@nxp.com, linux-kernel@vger.kernel.org, robin.murphy@arm.com, JuergenUrban@gmx.de Subject: Re: [PATCH 1/2] lib/genalloc.c: Add algorithm, align and zeroed family of DMA allocators Message-ID: <20190625205428.GA7449@roeck-us.net> References: <20190611190343.GA18459@roeck-us.net> <20190613134033.GA2489@sx9> <20190613153414.GA909@sx9> <3f2164cd-7655-b7cc-ec57-d8751886728c@roeck-us.net> <20190614142816.GA2574@sx9> <20190624063515.GA3296@lst.de> <20190624125916.GA2516@sx9> <20190625060000.GA28986@lst.de> <20190625150558.GA2560@sx9> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190625150558.GA2560@sx9> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 25, 2019 at 05:05:58PM +0200, Fredrik Noring wrote: > Provide the algorithm option to DMA allocators as well, along with > convenience variants for zeroed and aligned memory. The following > four functions are added: > > - gen_pool_dma_alloc_algo() > - gen_pool_dma_alloc_align() > - gen_pool_dma_zalloc_algo() > - gen_pool_dma_zalloc_align() > > Signed-off-by: Fredrik Noring The series fixes the problem I had observed in linux-next. Tested-by: Guenter Roeck Guenter > --- > Hi Christoph, > > This patch is based on my v5.0.21 branch, with Laurentiu Tudor's other > local memory changes. > > Fredrik > --- > include/linux/genalloc.h | 10 +++- > lib/genalloc.c | 100 +++++++++++++++++++++++++++++++++++++-- > 2 files changed, 105 insertions(+), 5 deletions(-) > > diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h > --- a/include/linux/genalloc.h > +++ b/include/linux/genalloc.h > @@ -121,7 +121,15 @@ extern unsigned long gen_pool_alloc_algo(struct gen_pool *, size_t, > genpool_algo_t algo, void *data); > extern void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, > dma_addr_t *dma); > -void *gen_pool_dma_zalloc(struct gen_pool *pool, size_t size, dma_addr_t *dma); > +extern void *gen_pool_dma_alloc_algo(struct gen_pool *pool, size_t size, > + dma_addr_t *dma, genpool_algo_t algo, void *data); > +extern void *gen_pool_dma_alloc_align(struct gen_pool *pool, size_t size, > + dma_addr_t *dma, int align); > +extern void *gen_pool_dma_zalloc(struct gen_pool *pool, size_t size, dma_addr_t *dma); > +extern void *gen_pool_dma_zalloc_algo(struct gen_pool *pool, size_t size, > + dma_addr_t *dma, genpool_algo_t algo, void *data); > +extern void *gen_pool_dma_zalloc_align(struct gen_pool *pool, size_t size, > + dma_addr_t *dma, int align); > extern void gen_pool_free(struct gen_pool *, unsigned long, size_t); > extern void gen_pool_for_each_chunk(struct gen_pool *, > void (*)(struct gen_pool *, struct gen_pool_chunk *, void *), void *); > diff --git a/lib/genalloc.c b/lib/genalloc.c > --- a/lib/genalloc.c > +++ b/lib/genalloc.c > @@ -347,13 +347,35 @@ EXPORT_SYMBOL(gen_pool_alloc_algo); > * Return: virtual address of the allocated memory, or %NULL on failure > */ > void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, dma_addr_t *dma) > +{ > + return gen_pool_dma_alloc_algo(pool, size, dma, pool->algo, pool->data); > +} > +EXPORT_SYMBOL(gen_pool_dma_alloc); > + > +/** > + * gen_pool_dma_alloc_algo - allocate special memory from the pool for DMA > + * usage with the given pool algorithm > + * @pool: pool to allocate from > + * @size: number of bytes to allocate from the pool > + * @dma: DMA-view physical address return value. Use %NULL if unneeded. > + * @algo: algorithm passed from caller > + * @data: data passed to algorithm > + * > + * Allocate the requested number of bytes from the specified pool. Uses the > + * given pool allocation function. Can not be used in NMI handler on > + * architectures without NMI-safe cmpxchg implementation. > + * > + * Return: virtual address of the allocated memory, or %NULL on failure > + */ > +void *gen_pool_dma_alloc_algo(struct gen_pool *pool, size_t size, > + dma_addr_t *dma, genpool_algo_t algo, void *data) > { > unsigned long vaddr; > > if (!pool) > return NULL; > > - vaddr = gen_pool_alloc(pool, size); > + vaddr = gen_pool_alloc_algo(pool, size, algo, data); > if (!vaddr) > return NULL; > > @@ -362,7 +384,31 @@ void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, dma_addr_t *dma) > > return (void *)vaddr; > } > -EXPORT_SYMBOL(gen_pool_dma_alloc); > +EXPORT_SYMBOL(gen_pool_dma_alloc_algo); > + > +/** > + * gen_pool_dma_alloc_align - allocate special memory from the pool for DMA > + * usage with the given alignment > + * @pool: pool to allocate from > + * @size: number of bytes to allocate from the pool > + * @dma: DMA-view physical address return value. Use %NULL if unneeded. > + * @align: alignment in bytes for starting address > + * > + * Allocate the requested number bytes from the specified pool, with the given > + * alignment restriction. Can not be used in NMI handler on architectures > + * without NMI-safe cmpxchg implementation. > + * > + * Return: virtual address of the allocated memory, or %NULL on failure > + */ > +void *gen_pool_dma_alloc_align(struct gen_pool *pool, size_t size, > + dma_addr_t *dma, int align) > +{ > + struct genpool_data_align data = { .align = align }; > + > + return gen_pool_dma_alloc_algo(pool, size, dma, > + gen_pool_first_fit_align, &data); > +} > +EXPORT_SYMBOL(gen_pool_dma_alloc_align); > > /** > * gen_pool_dma_zalloc - allocate special zeroed memory from the pool for > @@ -380,14 +426,60 @@ EXPORT_SYMBOL(gen_pool_dma_alloc); > */ > void *gen_pool_dma_zalloc(struct gen_pool *pool, size_t size, dma_addr_t *dma) > { > - void *vaddr = gen_pool_dma_alloc(pool, size, dma); > + return gen_pool_dma_zalloc_algo(pool, size, dma, pool->algo, pool->data); > +} > +EXPORT_SYMBOL(gen_pool_dma_zalloc); > + > +/** > + * gen_pool_dma_zalloc_algo - allocate special zeroed memory from the pool for > + * DMA usage with the given pool algorithm > + * @pool: pool to allocate from > + * @size: number of bytes to allocate from the pool > + * @dma: DMA-view physical address return value. Use %NULL if unneeded. > + * @algo: algorithm passed from caller > + * @data: data passed to algorithm > + * > + * Allocate the requested number of zeroed bytes from the specified pool. Uses > + * the given pool allocation function. Can not be used in NMI handler on > + * architectures without NMI-safe cmpxchg implementation. > + * > + * Return: virtual address of the allocated zeroed memory, or %NULL on failure > + */ > +void *gen_pool_dma_zalloc_algo(struct gen_pool *pool, size_t size, > + dma_addr_t *dma, genpool_algo_t algo, void *data) > +{ > + void *vaddr = gen_pool_dma_alloc_algo(pool, size, dma, algo, data); > > if (vaddr) > memset(vaddr, 0, size); > > return vaddr; > } > -EXPORT_SYMBOL(gen_pool_dma_zalloc); > +EXPORT_SYMBOL(gen_pool_dma_zalloc_algo); > + > +/** > + * gen_pool_dma_zalloc_align - allocate special zeroed memory from the pool for > + * DMA usage with the given alignment > + * @pool: pool to allocate from > + * @size: number of bytes to allocate from the pool > + * @dma: DMA-view physical address return value. Use %NULL if unneeded. > + * @align: alignment in bytes for starting address > + * > + * Allocate the requested number of zeroed bytes from the specified pool, > + * with the given alignment restriction. Can not be used in NMI handler on > + * architectures without NMI-safe cmpxchg implementation. > + * > + * Return: virtual address of the allocated zeroed memory, or %NULL on failure > + */ > +void *gen_pool_dma_zalloc_align(struct gen_pool *pool, size_t size, > + dma_addr_t *dma, int align) > +{ > + struct genpool_data_align data = { .align = align }; > + > + return gen_pool_dma_zalloc_algo(pool, size, dma, > + gen_pool_first_fit_align, &data); > +} > +EXPORT_SYMBOL(gen_pool_dma_zalloc_align); > > /** > * gen_pool_free - free allocated special memory back to the pool > -- > 2.21.0 >