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    Subject[PATCH v2 2/3] crypto: cavium - Add debugfs support in CNN55XX driver.
    Date
    Add debugfs support in CNN55XX Physical Function driver.
    Provides hardware counters and firmware information.

    Signed-off-by: Srikanth Jampala <Jampala.Srikanth@cavium.com>
    ---
    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
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