Merge 3.11-rc3 into usb-next

1 files changed, 348 insertions, 11 deletions

diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 5af21f2db29c..6e85e21445eb 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -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>
@@ -39,8 +41,9 @@
 #include "rsxx_cfg.h"
 
 #define NO_LEGACY 0
+#define SYNC_START_TIMEOUT (10 * 60) /* 10 minutes */
 
-MODULE_DESCRIPTION("IBM FlashSystem 70/80 PCIe SSD Device Driver");
+MODULE_DESCRIPTION("IBM Flash Adapter 900GB Full Height Device Driver");
 MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRIVER_VERSION);
@@ -49,9 +52,282 @@ static unsigned int force_legacy = NO_LEGACY;
 module_param(force_legacy, uint, 0444);
 MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts");
 
+static unsigned int sync_start = 1;
+module_param(sync_start, uint, 0444);
+MODULE_PARM_DESC(sync_start, "On by Default: Driver load will not complete "
+                             "until the card startup has completed.");
+
 static DEFINE_IDA(rsxx_disk_ida);
 static DEFINE_SPINLOCK(rsxx_ida_lock);
 
+/* --------------------Debugfs Setup ------------------- */
+
+struct rsxx_cram {
+        u32 f_pos;
+        u32 offset;
+        void *i_private;
+};
+
+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, "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.hard_errors);
+                seq_printf(m, "Ctrl %d Soft Errors      = %d\n",
+                                i, card->ctrl[i].stats.soft_errors);
+                seq_printf(m, "Ctrl %d Writes Issued    = %d\n",
+                                i, card->ctrl[i].stats.writes_issued);
+                seq_printf(m, "Ctrl %d Writes Failed    = %d\n",
+                                i, card->ctrl[i].stats.writes_failed);
+                seq_printf(m, "Ctrl %d Reads Issued     = %d\n",
+                                i, card->ctrl[i].stats.reads_issued);
+                seq_printf(m, "Ctrl %d Reads Failed     = %d\n",
+                                i, card->ctrl[i].stats.reads_failed);
+                seq_printf(m, "Ctrl %d Reads Retried    = %d\n",
+                                i, card->ctrl[i].stats.reads_retried);
+                seq_printf(m, "Ctrl %d Discards Issued  = %d\n",
+                                i, card->ctrl[i].stats.discards_issued);
+                seq_printf(m, "Ctrl %d Discards Failed  = %d\n",
+                                i, card->ctrl[i].stats.discards_failed);
+                seq_printf(m, "Ctrl %d DMA SW Errors    = %d\n",
+                                i, card->ctrl[i].stats.dma_sw_err);
+                seq_printf(m, "Ctrl %d DMA HW Faults    = %d\n",
+                                i, card->ctrl[i].stats.dma_hw_fault);
+                seq_printf(m, "Ctrl %d DMAs Cancelled   = %d\n",
+                                i, card->ctrl[i].stats.dma_cancelled);
+                seq_printf(m, "Ctrl %d SW Queue Depth   = %d\n",
+                                i, card->ctrl[i].stats.sw_q_depth);
+                seq_printf(m, "Ctrl %d HW Queue Depth   = %d\n",
+                        i, atomic_read(&card->ctrl[i].stats.hw_q_depth));
+        }
+
+        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 ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf,
+                              size_t cnt, loff_t *ppos)
+{
+        struct rsxx_cram *info = fp->private_data;
+        struct rsxx_cardinfo *card = info->i_private;
+        char *buf;
+        int st;
+
+        buf = kzalloc(sizeof(*buf) * cnt, GFP_KERNEL);
+        if (!buf)
+                return -ENOMEM;
+
+        info->f_pos = (u32)*ppos + info->offset;
+
+        st = rsxx_creg_read(card, CREG_ADD_CRAM + info->f_pos, cnt, buf, 1);
+        if (st)
+                return st;
+
+        st = copy_to_user(ubuf, buf, cnt);
+        if (st)
+                return st;
+
+        info->offset += cnt;
+
+        kfree(buf);
+
+        return cnt;
+}
+
+static ssize_t rsxx_cram_write(struct file *fp, const char __user *ubuf,
+                               size_t cnt, loff_t *ppos)
+{
+        struct rsxx_cram *info = fp->private_data;
+        struct rsxx_cardinfo *card = info->i_private;
+        char *buf;
+        int st;
+
+        buf = kzalloc(sizeof(*buf) * cnt, GFP_KERNEL);
+        if (!buf)
+                return -ENOMEM;
+
+        st = copy_from_user(buf, ubuf, cnt);
+        if (st)
+                return st;
+
+        info->f_pos = (u32)*ppos + info->offset;
+
+        st = rsxx_creg_write(card, CREG_ADD_CRAM + info->f_pos, cnt, buf, 1);
+        if (st)
+                return st;
+
+        info->offset += cnt;
+
+        kfree(buf);
+
+        return cnt;
+}
+
+static int rsxx_cram_open(struct inode *inode, struct file *file)
+{
+        struct rsxx_cram *info = kzalloc(sizeof(*info), GFP_KERNEL);
+        if (!info)
+                return -ENOMEM;
+
+        info->i_private = inode->i_private;
+        info->f_pos = file->f_pos;
+        file->private_data = info;
+
+        return 0;
+}
+
+static int rsxx_cram_release(struct inode *inode, struct file *file)
+{
+        struct rsxx_cram *info = file->private_data;
+
+        if (!info)
+                return 0;
+
+        kfree(info);
+        file->private_data = NULL;
+
+        return 0;
+}
+
+static const struct file_operations debugfs_cram_fops = {
+        .owner          = THIS_MODULE,
+        .open           = rsxx_cram_open,
+        .read           = rsxx_cram_read,
+        .write          = rsxx_cram_write,
+        .release        = rsxx_cram_release,
+};
+
+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)
+{
+        struct dentry *debugfs_stats;
+        struct dentry *debugfs_pci_regs;
+        struct dentry *debugfs_cram;
+
+        card->debugfs_dir = debugfs_create_dir(card->gendisk->disk_name, NULL);
+        if (IS_ERR_OR_NULL(card->debugfs_dir))
+                goto failed_debugfs_dir;
+
+        debugfs_stats = debugfs_create_file("stats", S_IRUGO,
+                                            card->debugfs_dir, card,
+                                            &debugfs_stats_fops);
+        if (IS_ERR_OR_NULL(debugfs_stats))
+                goto failed_debugfs_stats;
+
+        debugfs_pci_regs = debugfs_create_file("pci_regs", S_IRUGO,
+                                               card->debugfs_dir, card,
+                                               &debugfs_pci_regs_fops);
+        if (IS_ERR_OR_NULL(debugfs_pci_regs))
+                goto failed_debugfs_pci_regs;
+
+        debugfs_cram = debugfs_create_file("cram", S_IRUGO | S_IWUSR,
+                                           card->debugfs_dir, card,
+                                           &debugfs_cram_fops);
+        if (IS_ERR_OR_NULL(debugfs_cram))
+                goto failed_debugfs_cram;
+
+        return;
+failed_debugfs_cram:
+        debugfs_remove(debugfs_pci_regs);
+failed_debugfs_pci_regs:
+        debugfs_remove(debugfs_stats);
+failed_debugfs_stats:
+        debugfs_remove(card->debugfs_dir);
+failed_debugfs_dir:
+        card->debugfs_dir = NULL;
+}
+
 /*----------------- Interrupt Control & Handling -------------------*/
 
 static void rsxx_mask_interrupts(struct rsxx_cardinfo *card)
@@ -163,12 +439,13 @@ static irqreturn_t rsxx_isr(int irq, void *pdata)
                 }
 
                 if (isr & CR_INTR_CREG) {
-                        schedule_work(&card->creg_ctrl.done_work);
+                        queue_work(card->creg_ctrl.creg_wq,
+                                   &card->creg_ctrl.done_work);
                         handled++;
                 }
 
                 if (isr & CR_INTR_EVENT) {
-                        schedule_work(&card->event_work);
+                        queue_work(card->event_wq, &card->event_work);
                         rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
                         handled++;
                 }
@@ -329,7 +606,7 @@ static int rsxx_eeh_frozen(struct pci_dev *dev)
         int i;
         int st;
 
-        dev_warn(&dev->dev, "IBM FlashSystem PCI: preparing for slot reset.\n");
+        dev_warn(&dev->dev, "IBM Flash Adapter PCI: preparing for slot reset.\n");
 
         card->eeh_state = 1;
         rsxx_mask_interrupts(card);
@@ -367,15 +644,26 @@ static void rsxx_eeh_failure(struct pci_dev *dev)
 {
         struct rsxx_cardinfo *card = pci_get_drvdata(dev);
         int i;
+        int cnt = 0;
 
-        dev_err(&dev->dev, "IBM FlashSystem PCI: disabling failed card.\n");
+        dev_err(&dev->dev, "IBM Flash Adapter PCI: disabling failed card.\n");
 
         card->eeh_state = 1;
+        card->halt = 1;
 
-        for (i = 0; i < card->n_targets; i++)
-                del_timer_sync(&card->ctrl[i].activity_timer);
+        for (i = 0; i < card->n_targets; i++) {
+                spin_lock_bh(&card->ctrl[i].queue_lock);
+                cnt = rsxx_cleanup_dma_queue(&card->ctrl[i],
+                                             &card->ctrl[i].queue);
+                spin_unlock_bh(&card->ctrl[i].queue_lock);
+
+                cnt += rsxx_dma_cancel(&card->ctrl[i]);
 
-        rsxx_eeh_cancel_dmas(card);
+                if (cnt)
+                        dev_info(CARD_TO_DEV(card),
+                                "Freed %d queued DMAs on channel %d\n",
+                                cnt, card->ctrl[i].id);
+        }
 }
 
 static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card)
@@ -432,7 +720,7 @@ static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev)
         int st;
 
         dev_warn(&dev->dev,
-                "IBM FlashSystem PCI: recovering from slot reset.\n");
+                "IBM Flash Adapter PCI: recovering from slot reset.\n");
 
         st = pci_enable_device(dev);
         if (st)
@@ -485,7 +773,7 @@ static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev)
                                 &card->ctrl[i].issue_dma_work);
         }
 
-        dev_info(&dev->dev, "IBM FlashSystem PCI: recovery complete.\n");
+        dev_info(&dev->dev, "IBM Flash Adapter PCI: recovery complete.\n");
 
         return PCI_ERS_RESULT_RECOVERED;
 
@@ -528,6 +816,7 @@ static int rsxx_pci_probe(struct pci_dev *dev,
 {
         struct rsxx_cardinfo *card;
         int st;
+        unsigned int sync_timeout;
 
         dev_info(&dev->dev, "PCI-Flash SSD discovered\n");
 
@@ -610,7 +899,11 @@ static int rsxx_pci_probe(struct pci_dev *dev,
         }
 
         /************* Setup Processor Command Interface *************/
-        rsxx_creg_setup(card);
+        st = rsxx_creg_setup(card);
+        if (st) {
+                dev_err(CARD_TO_DEV(card), "Failed to setup creg interface.\n");
+                goto failed_creg_setup;
+        }
 
         spin_lock_irq(&card->irq_lock);
         rsxx_enable_ier_and_isr(card, CR_INTR_CREG);
@@ -650,6 +943,12 @@ static int rsxx_pci_probe(struct pci_dev *dev,
         }
 
         /************* Setup Card Event Handler *************/
+        card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event");
+        if (!card->event_wq) {
+                dev_err(CARD_TO_DEV(card), "Failed card event setup.\n");
+                goto failed_event_handler;
+        }
+
         INIT_WORK(&card->event_work, card_event_handler);
 
         st = rsxx_setup_dev(card);
@@ -676,6 +975,33 @@ static int rsxx_pci_probe(struct pci_dev *dev,
                 if (st)
                         dev_crit(CARD_TO_DEV(card),
                                 "Failed issuing card startup\n");
+                if (sync_start) {
+                        sync_timeout = SYNC_START_TIMEOUT;
+
+                        dev_info(CARD_TO_DEV(card),
+                                 "Waiting for card to startup\n");
+
+                        do {
+                                ssleep(1);
+                                sync_timeout--;
+
+                                rsxx_get_card_state(card, &card->state);
+                        } while (sync_timeout &&
+                                (card->state == CARD_STATE_STARTING));
+
+                        if (card->state == CARD_STATE_STARTING) {
+                                dev_warn(CARD_TO_DEV(card),
+                                         "Card startup timed out\n");
+                                card->size8 = 0;
+                        } else {
+                                dev_info(CARD_TO_DEV(card),
+                                        "card state: %s\n",
+                                        rsxx_card_state_to_str(card->state));
+                                st = rsxx_get_card_size8(card, &card->size8);
+                                if (st)
+                                        card->size8 = 0;
+                        }
+                }
         } else if (card->state == CARD_STATE_GOOD ||
                    card->state == CARD_STATE_RD_ONLY_FAULT) {
                 st = rsxx_get_card_size8(card, &card->size8);
@@ -685,12 +1011,21 @@ static int rsxx_pci_probe(struct pci_dev *dev,
 
         rsxx_attach_dev(card);
 
+        /************* Setup Debugfs *************/
+        rsxx_debugfs_dev_new(card);
+
         return 0;
 
 failed_create_dev:
+        destroy_workqueue(card->event_wq);
+        card->event_wq = NULL;
+failed_event_handler:
         rsxx_dma_destroy(card);
 failed_dma_setup:
 failed_compatiblity_check:
+        destroy_workqueue(card->creg_ctrl.creg_wq);
+        card->creg_ctrl.creg_wq = NULL;
+failed_creg_setup:
         spin_lock_irq(&card->irq_lock);
         rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
         spin_unlock_irq(&card->irq_lock);
@@ -756,6 +1091,8 @@ static void rsxx_pci_remove(struct pci_dev *dev)
         /* Prevent work_structs from re-queuing themselves. */
         card->halt = 1;
 
+        debugfs_remove_recursive(card->debugfs_dir);
+
         free_irq(dev->irq, card);
 
         if (!force_legacy)