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linux-elphel
Commit c500c142 authored by Oleg Dzhimiev's avatar Oleg Dzhimiev
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_elphel_buf.vaddr==0 if failed

parent 2bc79fbd
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Showing with 27 additions and 24 deletions
src/drivers/elphel/elphel393-mem.c
View file @ c500c142
......@@ -18,6 +18,10 @@
*! You should have received a copy of the GNU General Public License
*! along with this program. If not, see <http://www.gnu.org/licenses/>.
*!****************************************************************************/
#define DRV_NAME "elphel393-mem"
#define pr_fmt(fmt) DRV_NAME": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/of.h>
......@@ -74,7 +78,7 @@ static int __init elphelmem_init(void)
node = of_find_node_by_name(NULL, "elphel393-mem");
if (!node)
{
printk("DMA buffer allocation ERROR: No device tree node found\n");
pr_err("DMA buffer allocation ERROR: No device tree node found\n");
return -ENODEV;
}
......@@ -116,34 +120,33 @@ static int __init elphelmem_init(void)
// allocate continuous virtual memory range
// _elphel_buf.vaddr = kmalloc((_elphel_buf.size*PAGE_SIZE) ,GFP_KERNEL);
_elphel_buf.vaddr = dma_alloc_coherent(NULL,(_elphel_buf.size*PAGE_SIZE),&(_elphel_buf.paddr),GFP_KERNEL);
if(_elphel_buf.paddr) {
printk("Allocated %u pages for DMA at address 0x%x\n", (u32)_elphel_buf.size, (u32)_elphel_buf.paddr);
if(_elphel_buf.vaddr) {
pr_info("Allocated %u pages for DMA at address 0x%x\n", (u32)_elphel_buf.size, (u32)_elphel_buf.paddr);
} else {
printk("ERROR allocating coherent DMA memory buffer");
pr_err("ERROR allocating coherent DMA memory buffer\n");
}
_elphel_buf.h2d_vaddr = kzalloc((_elphel_buf.h2d_size*PAGE_SIZE) ,GFP_KERNEL);
if (!_elphel_buf.h2d_vaddr){
_elphel_buf.h2d_size = 0;
printk("ERROR allocating H2D DMA memory buffer");
pr_err("ERROR allocating H2D DMA memory buffer\n");
}
_elphel_buf.d2h_vaddr = kzalloc((_elphel_buf.d2h_size*PAGE_SIZE) ,GFP_KERNEL);
if (!_elphel_buf.d2h_vaddr){
_elphel_buf.d2h_size = 0;
printk("ERROR allocating D2H DMA memory buffer");
pr_err("ERROR allocating D2H DMA memory buffer\n");
}
_elphel_buf.bidir_vaddr = kzalloc((_elphel_buf.bidir_size*PAGE_SIZE) ,GFP_KERNEL);
if (!_elphel_buf.bidir_vaddr){
_elphel_buf.bidir_size = 0;
printk("ERROR allocating Bidirectional DMA memory buffer");
pr_err("ERROR allocating Bidirectional DMA memory buffer\n");
}
printk("Coherent buffer vaddr: 0x%08X\n",(u32) pElphel_buf -> vaddr);
printk("Coherent buffer paddr: 0x%08X\n",(u32) pElphel_buf -> paddr);
printk("Coherent buffer length: 0x%08X\n",(u32) pElphel_buf -> size * PAGE_SIZE);
pr_info("Coherent buffer vaddr: 0x%08X\n",(u32) pElphel_buf -> vaddr);
pr_info("Coherent buffer paddr: 0x%08X\n",(u32) pElphel_buf -> paddr);
pr_info("Coherent buffer length: 0x%08X\n",(u32) pElphel_buf -> size * PAGE_SIZE);
return 0;
}
......@@ -155,7 +158,7 @@ dma_map_single(struct device *dev, void *cpu_addr, size_t size,
*/
static void __exit elphelmem_exit(void)
{
printk("DMA buffer disabled\n");
pr_info("DMA buffer disabled\n");
}
......@@ -240,7 +243,7 @@ static ssize_t sync_for_device_h2d(struct device *dev, struct device_attribute *
paddr = _elphel_buf.h2d_paddr;
len = _elphel_buf.h2d_size * PAGE_SIZE;
}
printk("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
pr_info("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
dma_sync_single_for_device(dev, paddr, len, DMA_TO_DEVICE);
return count;
......@@ -255,7 +258,7 @@ static ssize_t sync_for_cpu_d2h(struct device *dev, struct device_attribute *att
paddr = _elphel_buf.d2h_paddr;
len = _elphel_buf.d2h_size * PAGE_SIZE;
}
printk("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
pr_info("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
dma_sync_single_for_cpu(dev, paddr, len, DMA_FROM_DEVICE);
return count;
......@@ -271,7 +274,7 @@ static ssize_t sync_for_device_d2h(struct device *dev, struct device_attribute *
paddr = _elphel_buf.d2h_paddr;
len = _elphel_buf.d2h_size * PAGE_SIZE;
}
printk("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
pr_info("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
dma_sync_single_for_device(dev, paddr, len, DMA_FROM_DEVICE);
return count;
......@@ -286,7 +289,7 @@ static ssize_t sync_for_cpu_bidir(struct device *dev, struct device_attribute *a
paddr = _elphel_buf.bidir_paddr;
len = _elphel_buf.bidir_size * PAGE_SIZE;
}
printk("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
pr_info("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
dma_sync_single_for_cpu(dev, paddr, len, DMA_BIDIRECTIONAL);
return count;
......@@ -302,7 +305,7 @@ static ssize_t sync_for_device_bidir(struct device *dev, struct device_attribute
paddr = _elphel_buf.bidir_paddr;
len = _elphel_buf.bidir_size * PAGE_SIZE;
}
printk("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
pr_info("\naddr=0x%08x, size = 0x%08x\n", paddr, len);
dma_sync_single_for_device(dev, paddr, len, DMA_BIDIRECTIONAL);
return count;
......@@ -392,7 +395,7 @@ static int elphel393_mem_probe(struct platform_device *pdev)
// mapped as DMA_BIDIRECTIONAL, each time will be synchronized when passing control from soft to hard and back
pElphel_buf->h2d_paddr = dma_map_single(&pdev->dev, _elphel_buf.h2d_vaddr, (_elphel_buf.h2d_size*PAGE_SIZE), DMA_TO_DEVICE);
if (!pElphel_buf->h2d_paddr){
printk("ERROR in dma_map_single() for bidirectional buffer");
pr_err("ERROR in dma_map_single() for bidirectional buffer\n");
return 0;
}
// printk("H2D DMA buffer location:\t\t0x%08X\n", pElphel_buf->h2d_paddr);
......@@ -402,7 +405,7 @@ static int elphel393_mem_probe(struct platform_device *pdev)
// mapped as DMA_BIDIRECTIONAL, each time will be synchronized when passing control from soft to hard and back
pElphel_buf->d2h_paddr = dma_map_single(&pdev->dev, _elphel_buf.d2h_vaddr, (_elphel_buf.d2h_size*PAGE_SIZE), DMA_FROM_DEVICE);
if (!pElphel_buf->d2h_paddr){
printk("ERROR in dma_map_single() for bidirectional buffer");
pr_err("ERROR in dma_map_single() for bidirectional buffer\n");
return 0;
}
// printk("D2H DMA buffer location:\t\t0x%08X\n", pElphel_buf->d2h_paddr);
......@@ -413,7 +416,7 @@ static int elphel393_mem_probe(struct platform_device *pdev)
// mapped as DMA_BIDIRECTIONAL, each time will be synchronized when passing control from soft to hard and back
pElphel_buf->bidir_paddr = dma_map_single(&pdev->dev, _elphel_buf.bidir_vaddr, (_elphel_buf.bidir_size*PAGE_SIZE), DMA_BIDIRECTIONAL);
if (!pElphel_buf->bidir_paddr){
printk("ERROR in dma_map_single() for bidirectional buffer");
pr_err("ERROR in dma_map_single() for bidirectional buffer\n");
return 0;
}
// printk("Bidirectional DMA buffer location:\t0x%08X\n", pElphel_buf->bidir_paddr);
......@@ -438,7 +441,7 @@ static int elphel393_mem_probe(struct platform_device *pdev)
static int elphel393_mem_remove(struct platform_device *pdev)
{
dev_info(&pdev->dev,"Removing elphel393-mem");
pr_info(&pdev->dev,"Removing elphel393-mem");
return 0;
}
......@@ -452,7 +455,7 @@ static struct platform_driver elphel393_mem = {
.probe = elphel393_mem_probe,
.remove = elphel393_mem_remove,
.driver = {
.name = "elphel393-mem",
.name = DRV_NAME,
.owner = THIS_MODULE,
.of_match_table = elphel393_mem_of_match,
.pm = NULL, /* power management */
......@@ -463,5 +466,5 @@ module_platform_driver(elphel393_mem);
module_init(elphelmem_init);
module_exit(elphelmem_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Elphel, Inc.");
MODULE_DESCRIPTION("Reserve a large chunk of contiguous memory at boot");
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