[PATCH v2 2/3] crypto: cavium - Add debugfs support in CNN55XX driver.

From: Srikanth Jampala
Date: Tue May 30 2017 - 07:59:09 EST

Add debugfs support in CNN55XX Physical Function driver.
Provides hardware counters and firmware information.

Signed-off-by: Srikanth Jampala <Jampala.Srikanth@xxxxxxxxxx>
---
drivers/crypto/cavium/nitrox/nitrox_csr.h | 4 +
drivers/crypto/cavium/nitrox/nitrox_dev.h | 4 +
drivers/crypto/cavium/nitrox/nitrox_main.c | 135 +++++++++++++++++++++++++++++
3 files changed, 143 insertions(+)

diff --git a/drivers/crypto/cavium/nitrox/nitrox_csr.h b/drivers/crypto/cavium/nitrox/nitrox_csr.h
index 5834651..30b04c4 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_csr.h
+++ b/drivers/crypto/cavium/nitrox/nitrox_csr.h
@@ -42,6 +42,8 @@
#define NPS_CORE_INT_ACTIVE 0x1000080
#define NPS_CORE_INT 0x10000A0
#define NPS_CORE_INT_ENA_W1S 0x10000B8
+#define NPS_STATS_PKT_DMA_RD_CNT 0x1000180
+#define NPS_STATS_PKT_DMA_WR_CNT 0x1000190

/* NPS packet registers */
#define NPS_PKT_INT 0x1040018
@@ -78,6 +80,7 @@
#define BMI_INT 0x1140000
#define BMI_CTL 0x1140020
#define BMI_INT_ENA_W1S 0x1140018
+#define BMI_NPS_PKT_CNT 0x1140070

/* EFL registers */
#define EFL_CORE_INT_ENA_W1SX(_i) (0x1240018 + ((_i) * 0x400))
@@ -91,6 +94,7 @@

/* BMO registers */
#define BMO_CTL2 0x1180028
+#define BMO_NPS_SLC_PKT_CNT 0x1180078

/* LBC registers */
#define LBC_INT 0x1200000
diff --git a/drivers/crypto/cavium/nitrox/nitrox_dev.h b/drivers/crypto/cavium/nitrox/nitrox_dev.h
index 2793a10..57858b0 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_dev.h
+++ b/drivers/crypto/cavium/nitrox/nitrox_dev.h
@@ -118,6 +118,7 @@ struct nitrox_bh {
* @msix: MSI-X information
* @bh: post processing work
* @hw: hardware information
+ * @debugfs_dir: debugfs directory
*/
struct nitrox_device {
struct list_head list;
@@ -141,6 +142,9 @@ struct nitrox_device {
struct nitrox_bh bh;

struct nitrox_hw hw;
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+ struct dentry *debugfs_dir;
+#endif
};

/**
diff --git a/drivers/crypto/cavium/nitrox/nitrox_main.c b/drivers/crypto/cavium/nitrox/nitrox_main.c
index aa33120..9b07003 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_main.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_main.c
@@ -1,5 +1,6 @@
#include <linux/aer.h>
#include <linux/delay.h>
+#include <linux/debugfs.h>
#include <linux/firmware.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -305,6 +306,135 @@ static int nitrox_pf_hw_init(struct nitrox_device *ndev)
return 0;
}

+#if IS_ENABLED(CONFIG_DEBUG_FS)
+static int registers_show(struct seq_file *s, void *v)
+{
+ struct nitrox_device *ndev = s->private;
+ u64 offset;
+
+ /* NPS DMA stats */
+ offset = NPS_STATS_PKT_DMA_RD_CNT;
+ seq_printf(s, "NPS_STATS_PKT_DMA_RD_CNT 0x%016llx\n",
+ nitrox_read_csr(ndev, offset));
+ offset = NPS_STATS_PKT_DMA_WR_CNT;
+ seq_printf(s, "NPS_STATS_PKT_DMA_WR_CNT 0x%016llx\n",
+ nitrox_read_csr(ndev, offset));
+
+ /* BMI/BMO stats */
+ offset = BMI_NPS_PKT_CNT;
+ seq_printf(s, "BMI_NPS_PKT_CNT 0x%016llx\n",
+ nitrox_read_csr(ndev, offset));
+ offset = BMO_NPS_SLC_PKT_CNT;
+ seq_printf(s, "BMO_NPS_PKT_CNT 0x%016llx\n",
+ nitrox_read_csr(ndev, offset));
+
+ return 0;
+}
+
+static int registers_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, registers_show, inode->i_private);
+}
+
+static const struct file_operations register_fops = {
+ .owner = THIS_MODULE,
+ .open = registers_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int firmware_show(struct seq_file *s, void *v)
+{
+ struct nitrox_device *ndev = s->private;
+
+ seq_printf(s, "Version: %s\n", ndev->hw.fw_name);
+ return 0;
+}
+
+static int firmware_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, firmware_show, inode->i_private);
+}
+
+static const struct file_operations firmware_fops = {
+ .owner = THIS_MODULE,
+ .open = firmware_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int nitrox_show(struct seq_file *s, void *v)
+{
+ struct nitrox_device *ndev = s->private;
+
+ seq_printf(s, "NITROX-5 [idx: %d]\n", ndev->idx);
+ seq_printf(s, " Revsion ID: 0x%0x\n", ndev->hw.revision_id);
+ seq_printf(s, " Cores [AE: %u SE: %u]\n",
+ ndev->hw.ae_cores, ndev->hw.se_cores);
+ seq_printf(s, " Number of Queues: %u\n", ndev->nr_queues);
+ seq_printf(s, " Queue length: %u\n", ndev->qlen);
+ seq_printf(s, " Node: %u\n", ndev->node);
+
+ return 0;
+}
+
+static int nitrox_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, nitrox_show, inode->i_private);
+}
+
+static const struct file_operations nitrox_fops = {
+ .owner = THIS_MODULE,
+ .open = nitrox_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void nitrox_debugfs_exit(struct nitrox_device *ndev)
+{
+ debugfs_remove_recursive(ndev->debugfs_dir);
+ ndev->debugfs_dir = NULL;
+}
+
+static int nitrox_debugfs_init(struct nitrox_device *ndev)
+{
+ struct dentry *dir, *f;
+
+ dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ if (!dir)
+ return -ENOMEM;
+
+ ndev->debugfs_dir = dir;
+ f = debugfs_create_file("counters", 0400, dir, ndev, &register_fops);
+ if (!f)
+ goto err;
+ f = debugfs_create_file("firmware", 0400, dir, ndev, &firmware_fops);
+ if (!f)
+ goto err;
+ f = debugfs_create_file("nitrox", 0400, dir, ndev, &nitrox_fops);
+ if (!f)
+ goto err;
+
+ return 0;
+
+err:
+ nitrox_debugfs_exit(ndev);
+ return -ENODEV;
+}
+#else
+static int nitrox_debugfs_init(struct nitrox_device *ndev)
+{
+ return 0;
+}
+
+static void nitrox_debugfs_exit(struct nitrox_device *ndev)
+{
+}
+#endif
+
/**
* nitrox_probe - NITROX Initialization function.
* @pdev: PCI device information struct
@@ -389,6 +519,10 @@ static int nitrox_probe(struct pci_dev *pdev,
if (err)
goto pf_hw_fail;

+ err = nitrox_debugfs_init(ndev);
+ if (err)
+ goto pf_hw_fail;
+
set_bit(NITROX_READY, &ndev->status);
/* barrier to sync with other cpus */
smp_mb__after_atomic();
@@ -431,6 +565,7 @@ static void nitrox_remove(struct pci_dev *pdev)
smp_mb__after_atomic();

nitrox_remove_from_devlist(ndev);
+ nitrox_debugfs_exit(ndev);
nitrox_pf_sw_cleanup(ndev);

iounmap(ndev->bar_addr);
--
2.9.3