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PCI: rockchip: add PCIe uDMA transfer debug node

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cat /sys/kernel/debug/pcie/pcie_trx

Change-Id: Idfdd9176ad55af4c7c0029bf1581f036d798bebc
Signed-off-by: Simon Xue <xxm@rock-chips.com>
This commit is contained in:
Simon Xue
2019-01-10 10:36:00 +08:00
committed by Tao Huang
parent b43575b260
commit 4ec40689cc
4 changed files with 57 additions and 1 deletions
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1
drivers/pci/host/pcie-dw-rockchip.c
View File

@@ -992,6 +992,7 @@ rk_pcie_handle_dma_interrupt(struct rk_pcie *rk_pcie)
return;
obj->dma_free = true;
obj->irq_num++;
if (list_empty(&obj->tbl_list)) {
if (obj->dma_free &&

6
drivers/pci/host/pcie-rockchip.c
View File

@@ -724,8 +724,10 @@ rk_pcie_handle_dma_interrupt(struct rockchip_pcie *rockchip)
WARN_ONCE(!(dma_status & 0x3), "dma_status 0x%x\n", dma_status);
if (dma_status & (1 << 0))
if (dma_status & (1 << 0)) {
obj->irq_num++;
obj->dma_free = true;
}
if (list_empty(&obj->tbl_list)) {
if (obj->dma_free &&
@@ -1446,6 +1448,8 @@ static ssize_t pcie_reset_ep_store(struct device *dev,
struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
struct dma_trx_obj *obj = rockchip->dma_obj;
dev_info(dev, "loop_cout = %d\n", obj->loop_count);
err = kstrtou32(buf, 10, &val);
if (err)
return err;

47
drivers/pci/host/rockchip-pcie-dma.c
View File

@@ -606,6 +606,41 @@ free_table:
return -ENOMEM;
}
#ifdef CONFIG_DEBUG_FS
static int rk_pcie_debugfs_trx_show(struct seq_file *s, void *v)
{
struct dma_trx_obj *dma_obj = s->private;
bool list = list_empty(&dma_obj->tbl_list);
seq_printf(s, "irq_num = %ld, loop_count = %d,",
dma_obj->irq_num, dma_obj->loop_count);
seq_printf(s, "loop_threshold = %d,",
dma_obj->loop_count_threshold);
seq_printf(s, "lwa = %lx, rwa = %lx, lra = %lx,",
dma_obj->local_write_available,
dma_obj->remote_write_available,
dma_obj->local_read_available);
seq_printf(s, "list : (%s), dma chn : (%s)\n",
list ? "empty" : "not empty",
dma_obj->dma_free ? "free" : "busy");
return 0;
}
static int rk_pcie_debugfs_open(struct inode *inode, struct file *file)
{
return single_open(file, rk_pcie_debugfs_trx_show, inode->i_private);
}
static const struct file_operations rk_pcie_debugfs_fops = {
.owner = THIS_MODULE,
.open = rk_pcie_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
#endif
struct dma_trx_obj *rk_pcie_dma_obj_probe(struct device *dev)
{
int ret;
@@ -676,12 +711,24 @@ struct dma_trx_obj *rk_pcie_dma_obj_probe(struct device *dev)
}
obj->dma_free = true;
obj->irq_num = 0;
obj->loop_count = 0;
obj->loop_count_threshold = 0;
init_completion(&obj->done);
rk_pcie_add_misc(obj);
#ifdef CONFIG_DEBUG_FS
obj->pcie_root = debugfs_create_dir("pcie", NULL);
if (!obj->pcie_root) {
obj = ERR_PTR(-EINVAL);
goto free_dma_table;
}
debugfs_create_file("pcie_trx", 0644, obj->pcie_root, obj,
&rk_pcie_debugfs_fops);
#endif
return obj;
free_dma_table:
rk_pcie_dma_table_free(obj, PCIE_DMA_TABLE_NUM);

4
drivers/pci/host/rockchip-pcie-dma.h
View File

@@ -3,6 +3,8 @@
* Copyright (C) 2018 Rockchip Electronics Co., Ltd.
*/
#include <linux/debugfs.h>
#define PCIE_DMA_TABLE_NUM 24
#define PCIE_DMA_TRX_TYPE_NUM 3
@@ -168,6 +170,8 @@ struct dma_trx_obj {
int busno;
void *priv;
struct completion done;
unsigned long irq_num;
struct dentry *pcie_root;
};
#ifdef CONFIG_PCIE_DW_ROCKCHIP