exported buffer from elphel393-mem (d8d417d9) · Commits · Elphel / linux-elphel

.cproject

+1 −0

Original line number	Diff line number	Diff line
		@@ -85,4 +85,5 @@
		<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
		</scannerConfigBuildInfo>
		</storageModule>
		<storageModule moduleId="refreshScope"/>
		</cproject>

.project

+39 −3

Original line number	Diff line number	Diff line
		@@ -6,15 +6,51 @@
		</projects>
		<buildSpec>
		<buildCommand>
		<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
		<triggers>clean,full,incremental,</triggers>
		<name>org.eclipse.ui.externaltools.ExternalToolBuilder</name>
		<triggers>full,incremental,</triggers>
		<arguments>
		<dictionary>
		<key>LaunchConfigHandle</key>
		<value><project>/.externalToolBuilders/org.eclipse.cdt.managedbuilder.core.genmakebuilder.launch</value>
		</dictionary>
		</arguments>
		</buildCommand>
		<buildCommand>
		<name>org.eclipse.ui.externaltools.ExternalToolBuilder</name>
		<triggers>full,incremental,</triggers>
		<arguments>
		<dictionary>
		<key>LaunchConfigHandle</key>
		<value><project>/.externalToolBuilders/org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder.launch</value>
		</dictionary>
		</arguments>
		</buildCommand>
		<buildCommand>
		<name>org.eclipse.ui.externaltools.ExternalToolBuilder</name>
		<triggers>full,incremental,</triggers>
		<arguments>
		<dictionary>
		<key>LaunchConfigHandle</key>
		<value><project>/.externalToolBuilders/bitbake compile [Builder].launch</value>
		</dictionary>
		<dictionary>
		<key>incclean</key>
		<value>true</value>
		</dictionary>
		</arguments>
		</buildCommand>
		<buildCommand>
		<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
		<name>org.eclipse.ui.externaltools.ExternalToolBuilder</name>
		<triggers>full,incremental,</triggers>
		<arguments>
		<dictionary>
		<key>LaunchConfigHandle</key>
		<value><project>/.externalToolBuilders/bitbake deploy [Builder].launch</value>
		</dictionary>
		<dictionary>
		<key>incclean</key>
		<value>true</value>
		</dictionary>
		</arguments>
		</buildCommand>
		</buildSpec>

src/drivers/elphel/elphel393-mem.c

+35 −10

Original line number	Diff line number	Diff line
		/!**************************************************************************
		*! FILE NAME : elphel393-mem.c
		*! DESCRIPTION: Reserve large memory range at boot time (when it is available)
		*! to use as a circular video buffer
		*! Copyright (C) 2015 Elphel, Inc.
		! -----------------------------------------------------------------------------*
		*!
		*! This program is free software: you can redistribute it and/or modify
		*! it under the terms of the GNU General Public License as published by
		*! the Free Software Foundation, either version 3 of the License, or
		*! (at your option) any later version.
		*!
		*! This program is distributed in the hope that it will be useful,
		*! but WITHOUT ANY WARRANTY; without even the implied warranty of
		*! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		*! GNU General Public License for more details.
		*!
		*! You should have received a copy of the GNU General Public License
		*! along with this program. If not, see <http://www.gnu.org/licenses/>.
		!***************************************************************************/
		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/of.h>
		@@ -9,31 +29,36 @@
		#include <asm/dma-mapping.h>
		#include <asm/outercache.h>
		#include <asm/cacheflush.h>

		#include "elphel393-mem.h"
		#define SYSFS_PERMISSIONS 0644 /* default permissions for sysfs files */
		#define SYSFS_READONLY 0444
		#define SYSFS_WRITEONLY 0222

		static ssize_t get_paddr(struct device dev, struct device_attribute attr, char *buf);

		/*
		struct elphel_buf_t
		{
		void *vaddr;
		dma_addr_t paddr;
		ssize_t size;
		};

		static struct elphel_buf_t elphel_buf = {
		*/
		static struct elphel_buf_t _elphel_buf = {
		.vaddr = NULL,
		.paddr = 0,
		.size = 0
		};

		struct elphel_buf_t elphel_buf; // static can not be extern

		EXPORT_SYMBOL_GPL(elphel_buf);
		static int __init elphelmem_init(void)
		{
		struct device_node *node;
		const __be32 *bufsize_be;

		elphel_buf = _elphel_buf; // static can not be extern

		node = of_find_node_by_name(NULL, "elphel393-mem");
		if (!node)
		{
		@@ -42,13 +67,13 @@ static int __init elphelmem_init(void)
		}

		bufsize_be = (__be32 *)of_get_property(node, "memsize", NULL);
		elphel_buf.size = be32_to_cpup(bufsize_be);
		_elphel_buf.size = be32_to_cpup(bufsize_be);

		elphel_buf.vaddr = dma_alloc_coherent(NULL,(elphel_buf.size*PAGE_SIZE),&(elphel_buf.paddr),GFP_KERNEL);
		_elphel_buf.vaddr = dma_alloc_coherent(NULL,(_elphel_buf.size*PAGE_SIZE),&(_elphel_buf.paddr),GFP_KERNEL);

		if(elphel_buf.paddr)
		if(_elphel_buf.paddr)
		{
		printk("Allocated %u pages for DMA at address 0x%x\n", (u32)elphel_buf.size, (u32)elphel_buf.paddr);
		printk("Allocated %u pages for DMA at address 0x%x\n", (u32)_elphel_buf.size, (u32)_elphel_buf.paddr);
		}
		else printk("ERROR allocating memory buffer");

		@@ -66,12 +91,12 @@ static void __exit elphelmem_exit(void)

		static ssize_t get_paddr(struct device dev, struct device_attribute attr, char *buf)
		{
		return sprintf(buf,"0x%x\n", (u32)elphel_buf.paddr);
		return sprintf(buf,"0x%x\n", (u32)_elphel_buf.paddr);
		}

		static ssize_t get_size(struct device dev, struct device_attribute attr, char *buf)
		{
		return sprintf(buf,"%u\n", elphel_buf.size);
		return sprintf(buf,"%u\n", _elphel_buf.size);
		}
		static ssize_t get_cache(struct device dev, struct device_attribute attr, char *buf)
		{

src/drivers/elphel/elphel393-mem.h

0 → 100644

+27 −0

Original line number	Diff line number	Diff line
		/!**************************************************************************
		*! FILE NAME : elphel393-mem.h
		*! DESCRIPTION:
		*! Copyright (C) 2015 Elphel, Inc.
		! -----------------------------------------------------------------------------*
		*!
		*! This program is free software: you can redistribute it and/or modify
		*! it under the terms of the GNU General Public License as published by
		*! the Free Software Foundation, either version 3 of the License, or
		*! (at your option) any later version.
		*!
		*! This program is distributed in the hope that it will be useful,
		*! but WITHOUT ANY WARRANTY; without even the implied warranty of
		*! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		*! GNU General Public License for more details.
		*!
		*! You should have received a copy of the GNU General Public License
		*! along with this program. If not, see <http://www.gnu.org/licenses/>.
		!***************************************************************************/
		struct elphel_buf_t
		{
		void *vaddr;
		dma_addr_t paddr;
		ssize_t size;
		};
		extern struct elphel_buf_t elphel_buf;