crypto: cavium - Add debugfs support in CNN55XX driver.

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

Signed-off-by: Srikanth Jampala <Jampala.Srikanth@cavium.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/cavium/nitrox/nitrox_csr.h b/drivers/crypto/cavium/nitrox/nitrox_csr.h
index 5834651..30b04c4 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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);