Merge branch 'pyro' into eel

1 files changed, 457 insertions, 0 deletions

diff --git a/meta-rcar-gen3-adas/recipes-kernel/kernel-module-cmemdrv/files/cmemdrv.c b/meta-rcar-gen3-adas/recipes-kernel/kernel-module-cmemdrv/files/cmemdrv.c
new file mode 100644
index 0000000..a5d4363
--- /dev/null
+++ b/meta-rcar-gen3-adas/recipes-kernel/kernel-module-cmemdrv/files/cmemdrv.c
@@ -0,0 +1,457 @@
+/*************************************************************************/ /*
+ Memory Driver (kernel module)
+
+ Copyright (C) 2015 - 2017 Renesas Electronics Corporation
+
+ License        Dual MIT/GPLv2
+
+ The contents of this file are subject to the MIT license as set out below.
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ Alternatively, the contents of this file may be used under the terms of
+ the GNU General Public License Version 2 ("GPL") in which case the provisions
+ of GPL are applicable instead of those above.
+
+ If you wish to allow use of your version of this file only under the terms of
+ GPL, and not to allow others to use your version of this file under the terms
+ of the MIT license, indicate your decision by deleting the provisions above
+ and replace them with the notice and other provisions required by GPL as set
+ out in the file called "GPL-COPYING" included in this distribution. If you do
+ not delete the provisions above, a recipient may use your version of this file
+ under the terms of either the MIT license or GPL.
+
+ This License is also included in this distribution in the file called
+ "MIT-COPYING".
+
+ EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
+ PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
+ COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ GPLv2:
+ If you wish to use this file under the terms of GPL, following terms are
+ effective.
+
+ 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; version 2 of the License.
+
+ 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, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/ /*************************************************************************/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <asm/uaccess.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/of_device.h>
+
+#define MAX_AREA_NUM 4
+#define DEFAULT_AREA_SIZE (16 * 1024 * 1024)
+
+#define PARAM_SET     1
+#define M_LOCK        3
+#define M_UNLOCK      4
+#define GET_PHYS_ADDR 5
+#define M_ALLOCATE    6
+#define M_UNALLOCATE  7
+#define TRY_CONV      8
+
+#define IOCTL_FROM_IMP_TO_CPU 0
+#define IOCTL_FROM_CPU_TO_IMP 1
+
+struct mem_area_data {
+	struct device *dev;
+	size_t size;
+	void *virt_ptr;
+	dma_addr_t phys_addr;
+};
+
+struct mem_access_data {
+	struct mem_area_data* area;
+	int start_offset;
+	int offset;
+	int width;
+	int height;
+	int stride;
+	int locked;
+	int tl;
+};
+
+static unsigned int bsize_count;
+static unsigned long bsize[MAX_AREA_NUM];
+module_param_array(bsize, ulong, &bsize_count, S_IRUGO);
+static int cached = 1;
+module_param(cached, int, S_IRUGO);
+
+#ifdef CFG_USE_FPGA
+static unsigned long cfg_bsize = 0;
+module_param(cfg_bsize, ulong, S_IRUGO);
+#endif
+
+static unsigned int cmem_major = 88;		// 0:auto
+module_param(cmem_major, uint, S_IRUGO);
+
+static struct class *cmem_class = NULL;
+static struct mem_area_data *cmem_areas[MAX_AREA_NUM];
+
+static int cv_v_to_p(unsigned long vaddr, unsigned long *paddr)
+{
+	struct vm_area_struct *vma;
+	unsigned long start, offset;
+	unsigned long pfn;
+	int ret;
+
+	*paddr = 0;
+
+	vma = find_vma(current->active_mm, vaddr);
+	if (vma == NULL)
+		return -EINVAL;
+
+	start = vaddr & PAGE_MASK;
+	ret = follow_pfn(vma, start, &pfn);
+	if (ret < 0)
+		return ret;
+
+	offset = offset_in_page(vaddr);
+	*paddr = (pfn << PAGE_SHIFT) + offset;
+
+	return 0;
+}
+
+static void do_tl(u64 *src, u64 *dst, unsigned int height, unsigned int step)
+{
+	unsigned int i;
+	int j;
+	unsigned int yaddr;
+	u64 *isrc, *idst, *isrcp, *idstp;
+
+	for (j = 0; j < height ; j += 2) {
+		yaddr = (j & ~0x1f) * step | ((j & 0x1f) << 7);
+		isrc = src + (yaddr >> 3);
+		idst = dst + (j * step >> 3);
+		for (i = 0; i < step >> 3; i += 16) {
+			idstp = idst + i;
+			isrcp = isrc + (i << 5);
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+
+			idstp = idst + i + (step >> 3);
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+			*idstp++ = *isrcp++;
+
+			//idst[i] = isrc[((i >> 4) << 9) + (i & 0xf)];
+		}
+	}
+}
+
+static ssize_t dev_read(struct file *filep, char *buf, size_t len, loff_t *ppos)
+{
+	size_t count;
+	struct mem_access_data *p = filep->private_data;
+
+	if (p->tl) {
+		do_tl( (u64 *)(p->area->virt_ptr + p->offset + p->start_offset),
+		       (u64 *)buf, p->height, p->stride );
+		count = len;
+	} else {
+		count = copy_to_user(buf, p->area->virt_ptr + p->offset + p->start_offset, len);
+	}
+
+	return count;
+}
+
+static ssize_t dev_write(struct file *filep, const char *buf, size_t len, loff_t *ppos)
+{
+	size_t count;
+	struct mem_access_data *p = filep->private_data;
+
+	count = copy_from_user(p->area->virt_ptr + p->offset + p->start_offset, buf, len);
+
+	return count;
+}
+
+static long dev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
+{
+	struct mem_access_data *p = filep->private_data;
+	struct device *dev = p->area->dev;
+	u32 offset, size, dir;
+
+	switch (cmd) {
+	case PARAM_SET :
+		p->width  = ((unsigned int *)arg)[0];
+		p->height = ((unsigned int *)arg)[1];
+		p->stride = ((unsigned int *)arg)[2];
+		p->tl     = ((unsigned int *)arg)[3];
+		p->offset = ((unsigned int *)arg)[4];
+		break;
+	case M_ALLOCATE :
+		break;
+	case M_LOCK :
+		if (cached) {
+			offset = ((unsigned int *)arg)[0];
+			size   = ((unsigned int *)arg)[1];
+			dir    = ((unsigned int *)arg)[2];
+			if (dir == IOCTL_FROM_IMP_TO_CPU)
+				dma_sync_single_for_device(dev, p->area->phys_addr + p->start_offset + offset, size, DMA_FROM_DEVICE);
+			else
+				dma_sync_single_for_device(dev, p->area->phys_addr + p->start_offset + offset, size, DMA_TO_DEVICE);
+		}
+		break;
+	case M_UNLOCK :
+		if (cached) {
+			offset = ((unsigned int *)arg)[0];
+			size   = ((unsigned int *)arg)[1];
+			dir    = ((unsigned int *)arg)[2];
+			if (dir == IOCTL_FROM_IMP_TO_CPU)
+				dma_sync_single_for_cpu(dev, p->area->phys_addr + p->start_offset + offset, size, DMA_FROM_DEVICE);
+			else
+				dma_sync_single_for_cpu(dev, p->area->phys_addr + p->start_offset + offset, size, DMA_TO_DEVICE);
+		}
+		break;
+	case M_UNALLOCATE :
+		break;
+	case GET_PHYS_ADDR :
+		*((unsigned int *)arg) = p->area->phys_addr;
+		break;
+	case TRY_CONV :
+		cv_v_to_p( ( (unsigned long *)arg )[0], (unsigned long *)arg + 1);
+		break;
+	default:
+		dev_warn(dev, "## unknown ioctl command %d\n", cmd);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int dev_mmap(struct file *filep, struct vm_area_struct *vma)
+{
+	struct mem_access_data *p = filep->private_data;
+	unsigned long off;
+	unsigned long start;
+
+	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
+		return -EINVAL;
+
+	off = vma->vm_pgoff << PAGE_SHIFT;
+	start = p->area->phys_addr;
+
+	if ((vma->vm_end - vma->vm_start + off) > p->area->size)
+		return -EINVAL;
+
+	off += start;
+	vma->vm_pgoff = off >> PAGE_SHIFT;
+	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+	if (!cached)
+		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+	return remap_pfn_range( vma,
+	                        vma->vm_start,
+	                        vma->vm_pgoff,
+	                        vma->vm_end - vma->vm_start,
+	                        vma->vm_page_prot ) ;
+}
+
+static int dev_open(struct inode *inode, struct file *filep)
+{
+	struct mem_access_data *mem_access_p;
+	int minor = iminor(inode);
+	struct mem_area_data* area = cmem_areas[minor];
+
+	mem_access_p = kzalloc(sizeof(*mem_access_p), GFP_KERNEL);
+	if (!mem_access_p)
+		return -ENOMEM;
+
+	dev_dbg(area->dev, "Device Open\n");
+	mem_access_p->area = area;
+	filep->private_data = mem_access_p;
+
+	return 0;
+}
+
+static int dev_rls(struct inode *inode, struct file *filep)
+{
+	struct mem_access_data *mem_access_p = filep->private_data;
+	kfree(mem_access_p);
+	return 0;
+}
+
+static struct file_operations fops = {
+	.owner          = THIS_MODULE,
+	.read           = dev_read,
+	.write          = dev_write,
+	.unlocked_ioctl = dev_ioctl,
+	.compat_ioctl   = dev_ioctl,
+	.mmap           = dev_mmap,
+	.open           = dev_open,
+	.release        = dev_rls,
+};
+
+static int cmemdrv_create_device(dev_t devt, size_t size)
+{
+	int ret;
+	struct mem_area_data *area;
+	struct device *dev;
+	void *virt_b_ptr;
+	dma_addr_t phy_b_addr;
+
+	dev = device_create(cmem_class, NULL, devt, NULL, "cmem%d", MINOR(devt));
+	if (IS_ERR(dev)) {
+		pr_err("cmem: unable to create device cmem%d\n", MINOR(devt));
+		return PTR_ERR(dev);
+	}
+
+	area = devm_kzalloc(dev, sizeof(*area), GFP_KERNEL);
+	if (!area) {
+		ret = -ENOMEM;
+		goto err;
+	}
+	area->dev = dev;
+
+#ifdef CONFIG_ARM64
+	{
+		struct device_node *np;
+		np = of_find_compatible_node(NULL, NULL, "shared-dma-pool");
+		of_dma_configure(dev, np);
+	}
+#endif
+
+	virt_b_ptr = dmam_alloc_coherent(dev, size + PAGE_SIZE, &phy_b_addr, GFP_KERNEL);
+	if (!virt_b_ptr) {
+		dev_err(dev, "Memory allocation failed.. (size:0x%zx)\n", size);
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	area->virt_ptr = PTR_ALIGN(virt_b_ptr, PAGE_SIZE);
+	area->phys_addr = phy_b_addr + (area->virt_ptr - virt_b_ptr);
+	area->size = size;
+	cmem_areas[MINOR(devt)] = area;
+	dev_notice(dev, "Memory allocated.. 0x%08lx (size:0x%zx)\n", (unsigned long)area->phys_addr, size);
+
+	return 0;
+
+err:
+	device_destroy(cmem_class, devt);
+	return ret;
+}
+
+static int __init cmemdrv_init(void)
+{
+	int i = 0;
+	int ret;
+
+	if (bsize_count == 0)
+		bsize[bsize_count++] = DEFAULT_AREA_SIZE;	/* add default area */
+
+#ifdef CFG_USE_FPGA
+	if (cfg_bsize && bsize_count < MAX_AREA_NUM)
+		bsize[bsize_count++] = cfg_bsize;	/* for compatibility */
+#endif
+
+	ret = register_chrdev(cmem_major, "CMem", &fops);
+	if (ret < 0) {
+		pr_err("cmem: unable to get major %d\n", cmem_major);
+		return ret;
+	}
+	if (cmem_major == 0)
+		cmem_major = ret;
+
+	cmem_class = class_create(THIS_MODULE, "cmem");
+	if (IS_ERR(cmem_class)) {
+		pr_err("cmem: unable to create class\n");
+		ret = PTR_ERR(cmem_class);
+		goto err1;
+	}
+
+	for (i = 0; i < bsize_count; i++) {
+		ret = cmemdrv_create_device(MKDEV(cmem_major, i), bsize[i]);
+		if (ret < 0)
+			goto err2;
+	}
+
+	return 0;
+
+err2:
+	for (i--; i >= 0; i--)
+		device_destroy(cmem_class, MKDEV(cmem_major, i));
+
+	class_destroy(cmem_class);
+err1:
+	unregister_chrdev(cmem_major, "CMem");
+	return ret;
+}
+
+static void __exit cmemdrv_exit(void)
+{
+	int i;
+	for (i = 0; i < bsize_count; i++)
+		device_destroy(cmem_class, MKDEV(cmem_major, i));
+
+	class_destroy(cmem_class);
+	unregister_chrdev(cmem_major, "CMem");
+}
+
+module_init(cmemdrv_init)
+module_exit(cmemdrv_exit)
+
+MODULE_AUTHOR("RenesasElectronicsCorp.");
+MODULE_DESCRIPTION("Userspace I/O driver for image memory");
+MODULE_LICENSE("GPL v2");