diff mbox series

[12/12] misc: pci_endpoint_test: Add debug and error messages

Message ID 20230215032155.74993-13-damien.lemoal@opensource.wdc.com
State New
Headers show
Series PCI endpoint fixes and improvements | expand

Commit Message

Damien Le Moal Feb. 15, 2023, 3:21 a.m. UTC 
Add dynamic debug messages with dev_dbg() to help troubleshoot issues
when running the endpoint tests. The debug messages for errors detected
in pci_endpoint_test_validate_xfer_params() are changed to error
messages.

Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
---
 drivers/misc/pci_endpoint_test.c | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

Comments

Greg KH Feb. 15, 2023, 11:34 a.m. UTC | #1 
On Wed, Feb 15, 2023 at 12:21:55PM +0900, Damien Le Moal wrote:
> Add dynamic debug messages with dev_dbg() to help troubleshoot issues
> when running the endpoint tests. The debug messages for errors detected
> in pci_endpoint_test_validate_xfer_params() are changed to error
> messages.
> 
> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
> ---
>  drivers/misc/pci_endpoint_test.c | 26 ++++++++++++++++++++++++--
>  1 file changed, 24 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
> index b05d3db85da8..c47f6e708ea2 100644
> --- a/drivers/misc/pci_endpoint_test.c
> +++ b/drivers/misc/pci_endpoint_test.c
> @@ -267,12 +267,15 @@ static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
>  	u32 val;
>  	int size;
>  	struct pci_dev *pdev = test->pdev;
> +	struct device *dev = &pdev->dev;
>  
>  	if (!test->bar[barno])
>  		return false;
>  
>  	size = pci_resource_len(pdev, barno);
>  
> +	dev_dbg(dev, "Test BAR %d, %d B\n", (int)barno, size);
> +
>  	if (barno == test->test_reg_bar)
>  		size = 0x4;
>  
> @@ -291,6 +294,10 @@ static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
>  static bool pci_endpoint_test_legacy_irq(struct pci_endpoint_test *test)
>  {
>  	u32 val;
> +	struct pci_dev *pdev = test->pdev;
> +	struct device *dev = &pdev->dev;
> +
> +	dev_dbg(dev, "Test legacy IRQ\n");

Please don't do this, it's one of the things that we remove from
drivers before merging.

If you need to follow the driver flow, then use ftrace, that's what it
is there for, don't add this type of "now in this function!" debug
lines, as that is redundant.

thanks,

greg k-h
diff mbox series

Patch

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index b05d3db85da8..c47f6e708ea2 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -267,12 +267,15 @@  static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
 	u32 val;
 	int size;
 	struct pci_dev *pdev = test->pdev;
+	struct device *dev = &pdev->dev;
 
 	if (!test->bar[barno])
 		return false;
 
 	size = pci_resource_len(pdev, barno);
 
+	dev_dbg(dev, "Test BAR %d, %d B\n", (int)barno, size);
+
 	if (barno == test->test_reg_bar)
 		size = 0x4;
 
@@ -291,6 +294,10 @@  static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
 static bool pci_endpoint_test_legacy_irq(struct pci_endpoint_test *test)
 {
 	u32 val;
+	struct pci_dev *pdev = test->pdev;
+	struct device *dev = &pdev->dev;
+
+	dev_dbg(dev, "Test legacy IRQ\n");
 
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE,
 				 IRQ_TYPE_LEGACY);
@@ -310,6 +317,9 @@  static bool pci_endpoint_test_msi_irq(struct pci_endpoint_test *test,
 {
 	u32 val;
 	struct pci_dev *pdev = test->pdev;
+	struct device *dev = &pdev->dev;
+
+	dev_dbg(dev, "Test MSI%s %d\n", msix ? "X" : "", msi_num);
 
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE,
 				 msix ? IRQ_TYPE_MSIX : IRQ_TYPE_MSI);
@@ -329,12 +339,12 @@  static int pci_endpoint_test_validate_xfer_params(struct device *dev,
 		struct pci_endpoint_test_xfer_param *param, size_t alignment)
 {
 	if (!param->size) {
-		dev_dbg(dev, "Data size is zero\n");
+		dev_err(dev, "Data size is zero\n");
 		return -EINVAL;
 	}
 
 	if (param->size > SIZE_MAX - alignment) {
-		dev_dbg(dev, "Maximum transfer data size exceeded\n");
+		dev_err(dev, "Maximum transfer data size exceeded\n");
 		return -EINVAL;
 	}
 
@@ -444,6 +454,10 @@  static bool pci_endpoint_test_copy(struct pci_endpoint_test *test,
 		dst_addr = orig_dst_addr;
 	}
 
+	dev_dbg(dev,
+		"Test COPY align %zu, src phys addr 0x%llx, dst phys addr 0x%llx, %zu B\n",
+		alignment, src_phys_addr, dst_phys_addr, size);
+
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_LOWER_DST_ADDR,
 				 lower_32_bits(dst_phys_addr));
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_UPPER_DST_ADDR,
@@ -549,6 +563,10 @@  static bool pci_endpoint_test_write(struct pci_endpoint_test *test,
 		addr = orig_addr;
 	}
 
+	dev_dbg(dev,
+		"Test WRITE align %zu, phys addr 0x%llx, %zu B\n",
+		alignment, phys_addr, size);
+
 	crc32 = crc32_le(~0, addr, size);
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_CHECKSUM,
 				 crc32);
@@ -647,6 +665,10 @@  static bool pci_endpoint_test_read(struct pci_endpoint_test *test,
 		addr = orig_addr;
 	}
 
+	dev_dbg(dev,
+		"Test READ align %zu, phys addr 0x%llx, %zu B\n",
+		alignment, phys_addr, size);
+
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_LOWER_DST_ADDR,
 				 lower_32_bits(phys_addr));
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_UPPER_DST_ADDR,