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Message-ID: <20130502002317.GA29619@oc6784271780.ibm.com>
Date: Wed, 1 May 2013 19:23:17 -0500
From: "Philip J. Kelleher" <pjk1939@...ux.vnet.ibm.com>
To: axboe@...nel.dk
Cc: linux-kernel@...r.kernel.org, klebers@...ux.vnet.ibm.com,
brking@...ux.vnet.ibm.com
Subject: [PATCH 1/8] rsxx: Adding in debugfs entries.
From: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com>
Adding in some debugfs entries to help with debugging and
testing code.
Signed-off-by: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com>
-------------------------------------------------------------------------------
diff -uprN -X linux-block-vanilla/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/core.c linux-block/drivers/block/rsxx/core.c
--- linux-block-vanilla/drivers/block/rsxx/core.c 2013-05-01 11:35:38.626248876 -0500
+++ linux-block/drivers/block/rsxx/core.c 2013-05-01 18:21:46.559245461 -0500
@@ -31,6 +31,8 @@
#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/delay.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
#include <linux/genhd.h>
#include <linux/idr.h>
@@ -39,6 +41,7 @@
#include "rsxx_cfg.h"
#define NO_LEGACY 0
+#define DEBUGFS_NULL NULL
MODULE_DESCRIPTION("IBM FlashSystem 70/80 PCIe SSD Device Driver");
MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM");
@@ -52,6 +55,191 @@ MODULE_PARM_DESC(force_legacy, "Force th
static DEFINE_IDA(rsxx_disk_ida);
static DEFINE_SPINLOCK(rsxx_ida_lock);
+/* --------------------Debugfs Setup ------------------- */
+
+static struct dentry *rsxx_debugfs_root = DEBUGFS_NULL;
+
+static int rsxx_attr_pci_regs_show(struct seq_file *m, void *p)
+{
+ struct rsxx_cardinfo *card = m->private;
+
+ seq_printf(m, "HWID 0x%08x\n",
+ ioread32(card->regmap + HWID));
+ seq_printf(m, "SCRATCH 0x%08x\n",
+ ioread32(card->regmap + SCRATCH));
+ seq_printf(m, "ISR 0x%08x\n",
+ ioread32(card->regmap + ISR));
+ seq_printf(m, "IER 0x%08x\n",
+ ioread32(card->regmap + IER));
+ seq_printf(m, "IPR 0x%08x\n",
+ ioread32(card->regmap + IPR));
+ seq_printf(m, "CREG_CMD 0x%08x\n",
+ ioread32(card->regmap + CREG_CMD));
+ seq_printf(m, "CREG_ADD 0x%08x\n",
+ ioread32(card->regmap + CREG_ADD));
+ seq_printf(m, "CREG_CNT 0x%08x\n",
+ ioread32(card->regmap + CREG_CNT));
+ seq_printf(m, "CREG_STAT 0x%08x\n",
+ ioread32(card->regmap + CREG_STAT));
+ seq_printf(m, "CREG_DATA0 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA0));
+ seq_printf(m, "CREG_DATA1 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA1));
+ seq_printf(m, "CREG_DATA2 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA2));
+ seq_printf(m, "CREG_DATA3 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA3));
+ seq_printf(m, "CREG_DATA4 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA4));
+ seq_printf(m, "CREG_DATA5 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA5));
+ seq_printf(m, "CREG_DATA6 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA6));
+ seq_printf(m, "CREG_DATA7 0x%08x\n",
+ ioread32(card->regmap + CREG_DATA7));
+ seq_printf(m, "INTR_COAL 0x%08x\n",
+ ioread32(card->regmap + INTR_COAL));
+ seq_printf(m, "HW_ERROR 0x%08x\n",
+ ioread32(card->regmap + HW_ERROR));
+ seq_printf(m, "DEBUG0 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG0));
+ seq_printf(m, "DEBUG1 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG1));
+ seq_printf(m, "DEBUG2 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG2));
+ seq_printf(m, "DEBUG3 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG3));
+ seq_printf(m, "DEBUG4 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG4));
+ seq_printf(m, "DEBUG5 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG5));
+ seq_printf(m, "DEBUG6 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG6));
+ seq_printf(m, "DEBUG7 0x%08x\n",
+ ioread32(card->regmap + PCI_DEBUG7));
+ seq_printf(m, "RECONFIG 0x%08x\n",
+ ioread32(card->regmap + PCI_RECONFIG));
+
+ return 0;
+}
+
+static int rsxx_attr_stats_show(struct seq_file *m, void *p)
+{
+ struct rsxx_cardinfo *card = m->private;
+ int i;
+
+ for (i = 0; i < card->n_targets; i++) {
+ seq_printf(m, "Ctrl %d CRC Errors = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Hard Errors = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Soft Errors = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Writes Issued = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Writes Failed = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Reads Issued = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Reads Failed = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Reads Retried = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Discards Issued = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d Discards Failed = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d DMA SW Errors = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d DMA HW Faults = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d DMAs Cancelled = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d SW Queue Depth = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ seq_printf(m, "Ctrl %d HW Queue Depth = %d\n",
+ i, card->ctrl[i].stats.crc_errors);
+ }
+
+ return 0;
+}
+
+static int rsxx_attr_stats_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rsxx_attr_stats_show, inode->i_private);
+}
+
+static int rsxx_attr_pci_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rsxx_attr_pci_regs_show, inode->i_private);
+}
+
+static const struct file_operations debugfs_stats_fops = {
+ .owner = THIS_MODULE,
+ .open = rsxx_attr_stats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations debugfs_pci_regs_fops = {
+ .owner = THIS_MODULE,
+ .open = rsxx_attr_pci_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void rsxx_debugfs_dev_new(struct rsxx_cardinfo *card)
+{
+ if (!rsxx_debugfs_root)
+ return;
+
+ card->debugfs_dir = debugfs_create_dir(card->gendisk->disk_name,
+ rsxx_debugfs_root);
+ if (!card->debugfs_dir)
+ return;
+
+ card->debugfs_stats = debugfs_create_file("stats", S_IRUGO,
+ card->debugfs_dir, card,
+ &debugfs_stats_fops);
+ if (!card->debugfs_stats)
+ return;
+
+ card->debugfs_pci_regs = debugfs_create_file("pci_regs", S_IRUGO,
+ card->debugfs_dir, card,
+ &debugfs_pci_regs_fops);
+ if (!card->debugfs_pci_regs)
+ return;
+}
+
+static void rsxx_debugfs_dev_remove(struct rsxx_cardinfo *card)
+{
+ debugfs_remove(card->debugfs_stats);
+ card->debugfs_stats = NULL;
+
+ debugfs_remove(card->debugfs_pci_regs);
+ card->debugfs_pci_regs = NULL;
+
+ debugfs_remove(card->debugfs_dir);
+ card->debugfs_dir = NULL;
+}
+
+static void rsxx_debugfs_init(void)
+{
+ rsxx_debugfs_root = debugfs_create_dir(DRIVER_NAME, NULL);
+ if (!rsxx_debugfs_root)
+ return;
+}
+
+static void rsxx_debugfs_destroy(void)
+{
+ if (!rsxx_debugfs_root)
+ return;
+ debugfs_remove(rsxx_debugfs_root);
+ rsxx_debugfs_root = NULL;
+}
+
/*----------------- Interrupt Control & Handling -------------------*/
static void rsxx_mask_interrupts(struct rsxx_cardinfo *card)
@@ -685,6 +873,10 @@ static int rsxx_pci_probe(struct pci_dev
rsxx_attach_dev(card);
+ /************* Setup Debugfs *************/
+ rsxx_debugfs_init();
+ rsxx_debugfs_dev_new(card);
+
return 0;
failed_create_dev:
@@ -756,6 +948,9 @@ static void rsxx_pci_remove(struct pci_d
/* Prevent work_structs from re-queuing themselves. */
card->halt = 1;
+ rsxx_debugfs_dev_remove(card);
+ rsxx_debugfs_destroy();
+
free_irq(dev->irq, card);
if (!force_legacy)
diff -uprN -X linux-block-vanilla/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/rsxx_priv.h linux-block/drivers/block/rsxx/rsxx_priv.h
--- linux-block-vanilla/drivers/block/rsxx/rsxx_priv.h 2013-05-01 11:35:38.655248529 -0500
+++ linux-block/drivers/block/rsxx/rsxx_priv.h 2013-05-01 18:22:51.392187447 -0500
@@ -181,6 +181,11 @@ struct rsxx_cardinfo {
int n_targets;
struct rsxx_dma_ctrl *ctrl;
+
+ /* Debugfs Variables */
+ struct dentry *debugfs_dir;
+ struct dentry *debugfs_stats;
+ struct dentry *debugfs_pci_regs;
};
enum rsxx_pci_regmap {
--
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