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s390/pci: debug device states
Use the debugfs to keep track of a pci function's status changes. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -7,14 +7,11 @@ extern debug_info_t *pci_debug_msg_id;
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extern debug_info_t *pci_debug_err_id;
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#ifdef CONFIG_PCI_DEBUG
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#define zpci_dbg(fmt, args...) \
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do { \
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if (pci_debug_msg_id->level >= 2) \
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debug_sprintf_event(pci_debug_msg_id, 2, fmt , ## args);\
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} while (0)
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#define zpci_dbg(imp, fmt, args...) \
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debug_sprintf_event(pci_debug_msg_id, imp, fmt, ##args)
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#else /* !CONFIG_PCI_DEBUG */
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#define zpci_dbg(fmt, args...) do { } while (0)
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#define zpci_dbg(imp, fmt, args...) do { } while (0)
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#endif
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#define zpci_err(text...) \
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@ -99,9 +99,6 @@ static int __read_mostly aisb_max;
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static struct kmem_cache *zdev_irq_cache;
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static struct kmem_cache *zdev_fmb_cache;
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debug_info_t *pci_debug_msg_id;
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debug_info_t *pci_debug_err_id;
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static inline int irq_to_msi_nr(unsigned int irq)
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{
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return irq & ZPCI_MSI_MASK;
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@ -13,6 +13,7 @@
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <asm/pci_debug.h>
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#include <asm/pci_clp.h>
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/*
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@ -144,6 +145,7 @@ int clp_add_pci_device(u32 fid, u32 fh, int configured)
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struct zpci_dev *zdev;
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int rc;
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zpci_dbg(3, "add fid:%x, fh:%x, c:%d\n", fid, fh, configured);
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zdev = zpci_alloc_device();
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if (IS_ERR(zdev))
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return PTR_ERR(zdev);
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@ -204,8 +206,8 @@ static int clp_set_pci_fn(u32 *fh, u8 nr_dma_as, u8 command)
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if (!rc && rrb->response.hdr.rsp == CLP_RC_OK)
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*fh = rrb->response.fh;
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else {
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pr_err("Set PCI FN failed with response: %x cc: %d\n",
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rrb->response.hdr.rsp, rc);
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zpci_dbg(0, "SPF fh:%x, cc:%d, resp:%x\n", *fh, rc,
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rrb->response.hdr.rsp);
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rc = -EIO;
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}
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clp_free_block(rrb);
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@ -221,6 +223,8 @@ int clp_enable_fh(struct zpci_dev *zdev, u8 nr_dma_as)
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if (!rc)
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/* Success -> store enabled handle in zdev */
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zdev->fh = fh;
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zpci_dbg(3, "ena fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
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return rc;
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}
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@ -237,9 +241,8 @@ int clp_disable_fh(struct zpci_dev *zdev)
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if (!rc)
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/* Success -> store disabled handle in zdev */
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zdev->fh = fh;
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else
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dev_err(&zdev->pdev->dev,
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"Failed to disable fn handle: 0x%x\n", fh);
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zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
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return rc;
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}
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@ -11,12 +11,17 @@
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#include <linux/kernel.h>
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#include <linux/seq_file.h>
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#include <linux/debugfs.h>
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#include <linux/export.h>
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#include <linux/pci.h>
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#include <asm/debug.h>
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#include <asm/pci_dma.h>
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static struct dentry *debugfs_root;
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debug_info_t *pci_debug_msg_id;
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EXPORT_SYMBOL_GPL(pci_debug_msg_id);
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debug_info_t *pci_debug_err_id;
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EXPORT_SYMBOL_GPL(pci_debug_err_id);
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static char *pci_perf_names[] = {
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/* hardware counters */
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@ -168,7 +173,6 @@ int __init zpci_debug_init(void)
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return -EINVAL;
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debug_register_view(pci_debug_msg_id, &debug_sprintf_view);
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debug_set_level(pci_debug_msg_id, 3);
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zpci_dbg("Debug view initialized\n");
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/* error log */
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pci_debug_err_id = debug_register("pci_error", 2, 1, 16);
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@ -176,7 +180,6 @@ int __init zpci_debug_init(void)
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return -EINVAL;
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debug_register_view(pci_debug_err_id, &debug_hex_ascii_view);
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debug_set_level(pci_debug_err_id, 6);
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zpci_err("Debug view initialized\n");
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debugfs_root = debugfs_create_dir("pci", NULL);
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return 0;
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@ -16,6 +16,7 @@
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#include <linux/pci.h>
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#include <linux/pci_hotplug.h>
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#include <linux/init.h>
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#include <asm/pci_debug.h>
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#include <asm/sclp.h>
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#define SLOT_NAME_SIZE 10
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@ -49,6 +50,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
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return -EIO;
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rc = sclp_pci_configure(slot->zdev->fid);
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zpci_dbg(3, "conf fid:%x, rc:%d\n", slot->zdev->fid, rc);
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if (!rc) {
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slot->zdev->state = ZPCI_FN_STATE_CONFIGURED;
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/* automatically scan the device after is was configured */
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@ -70,6 +72,7 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
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* or do we need to trigger that here?
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*/
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rc = sclp_pci_deconfigure(slot->zdev->fid);
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zpci_dbg(3, "deconf fid:%x, rc:%d\n", slot->zdev->fid, rc);
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if (!rc) {
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/* Fixme: better call List-PCI to find the disabled FH
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for the FID since the FH should be opaque... */
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