Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 update #2 from Martin Schwidefsky: "The main patch is the function measurement blocks extension for PCI to do performance statistics and help with debugging. The other patch is a small cleanup in ccwdev.h." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/ccwdev: Include asm/schid.h. s390/pci: performance statistics and debug infrastructure
This commit is contained in:
Linus Torvalds
Коммит
7b077868cb
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@ -12,15 +12,13 @@
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#include <linux/mod_devicetable.h>
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#include <asm/fcx.h>
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#include <asm/irq.h>
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#include <asm/schid.h>
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/* structs from asm/cio.h */
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struct irb;
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struct ccw1;
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struct ccw_dev_id;
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/* from asm/schid.h */
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struct subchannel_id;
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/* simplified initializers for struct ccw_device:
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* CCW_DEVICE and CCW_DEVICE_DEVTYPE initialize one
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* entry in your MODULE_DEVICE_TABLE and set the match_flag correctly */
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@ -9,6 +9,7 @@
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#include <asm-generic/pci.h>
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#include <asm-generic/pci-dma-compat.h>
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#include <asm/pci_clp.h>
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#include <asm/pci_debug.h>
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#define PCIBIOS_MIN_IO 0x1000
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#define PCIBIOS_MIN_MEM 0x10000000
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@ -33,6 +34,25 @@ int pci_proc_domain(struct pci_bus *);
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#define ZPCI_FC_BLOCKED 0x20
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#define ZPCI_FC_DMA_ENABLED 0x10
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struct zpci_fmb {
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u32 format : 8;
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u32 dma_valid : 1;
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u32 : 23;
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u32 samples;
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u64 last_update;
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/* hardware counters */
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u64 ld_ops;
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u64 st_ops;
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u64 stb_ops;
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u64 rpcit_ops;
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u64 dma_rbytes;
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u64 dma_wbytes;
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/* software counters */
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atomic64_t allocated_pages;
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atomic64_t mapped_pages;
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atomic64_t unmapped_pages;
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} __packed __aligned(16);
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struct msi_map {
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unsigned long irq;
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struct msi_desc *msi;
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@ -92,7 +112,15 @@ struct zpci_dev {
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u64 end_dma; /* End of available DMA addresses */
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u64 dma_mask; /* DMA address space mask */
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/* Function measurement block */
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struct zpci_fmb *fmb;
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u16 fmb_update; /* update interval */
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enum pci_bus_speed max_bus_speed;
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struct dentry *debugfs_dev;
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struct dentry *debugfs_perf;
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struct dentry *debugfs_debug;
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};
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struct pci_hp_callback_ops {
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@ -155,4 +183,15 @@ extern struct list_head zpci_list;
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extern struct pci_hp_callback_ops hotplug_ops;
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extern unsigned int pci_probe;
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/* FMB */
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int zpci_fmb_enable_device(struct zpci_dev *);
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int zpci_fmb_disable_device(struct zpci_dev *);
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/* Debug */
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int zpci_debug_init(void);
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void zpci_debug_exit(void);
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void zpci_debug_init_device(struct zpci_dev *);
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void zpci_debug_exit_device(struct zpci_dev *);
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void zpci_debug_info(struct zpci_dev *, struct seq_file *);
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#endif
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@ -0,0 +1,36 @@
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#ifndef _S390_ASM_PCI_DEBUG_H
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#define _S390_ASM_PCI_DEBUG_H
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#include <asm/debug.h>
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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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#else /* !CONFIG_PCI_DEBUG */
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#define zpci_dbg(fmt, args...) do { } while (0)
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#endif
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#define zpci_err(text...) \
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do { \
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char debug_buffer[16]; \
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snprintf(debug_buffer, 16, text); \
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debug_text_event(pci_debug_err_id, 0, debug_buffer); \
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} while (0)
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static inline void zpci_err_hex(void *addr, int len)
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{
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while (len > 0) {
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debug_event(pci_debug_err_id, 0, (void *) addr, len);
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len -= pci_debug_err_id->buf_size;
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addr += pci_debug_err_id->buf_size;
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}
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}
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#endif
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@ -3,4 +3,4 @@
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#
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obj-$(CONFIG_PCI) += pci.o pci_dma.o pci_clp.o pci_msi.o \
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pci_sysfs.o pci_event.o
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pci_sysfs.o pci_event.o pci_debug.o
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@ -98,6 +98,10 @@ EXPORT_SYMBOL_GPL(zpci_iomap_start);
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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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@ -216,6 +220,7 @@ struct mod_pci_args {
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u64 base;
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u64 limit;
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u64 iota;
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u64 fmb_addr;
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};
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static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args *args)
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@ -232,6 +237,7 @@ static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args
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fib->pba = args->base;
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fib->pal = args->limit;
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fib->iota = args->iota;
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fib->fmb_addr = args->fmb_addr;
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rc = mpcifc_instr(req, fib);
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free_page((unsigned long) fib);
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@ -242,7 +248,7 @@ static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args
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int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
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u64 base, u64 limit, u64 iota)
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{
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struct mod_pci_args args = { base, limit, iota };
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struct mod_pci_args args = { base, limit, iota, 0 };
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WARN_ON_ONCE(iota & 0x3fff);
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args.iota |= ZPCI_IOTA_RTTO_FLAG;
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@ -252,7 +258,7 @@ int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
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/* Modify PCI: Unregister I/O address translation parameters */
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int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
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{
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struct mod_pci_args args = { 0, 0, 0 };
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struct mod_pci_args args = { 0, 0, 0, 0 };
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return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args);
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}
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@ -260,11 +266,46 @@ int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
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/* Modify PCI: Unregister adapter interruptions */
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static int zpci_unregister_airq(struct zpci_dev *zdev)
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{
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struct mod_pci_args args = { 0, 0, 0 };
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struct mod_pci_args args = { 0, 0, 0, 0 };
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return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args);
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}
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/* Modify PCI: Set PCI function measurement parameters */
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int zpci_fmb_enable_device(struct zpci_dev *zdev)
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{
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struct mod_pci_args args = { 0, 0, 0, 0 };
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if (zdev->fmb)
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return -EINVAL;
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zdev->fmb = kmem_cache_alloc(zdev_fmb_cache, GFP_KERNEL);
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if (!zdev->fmb)
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return -ENOMEM;
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memset(zdev->fmb, 0, sizeof(*zdev->fmb));
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WARN_ON((u64) zdev->fmb & 0xf);
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args.fmb_addr = virt_to_phys(zdev->fmb);
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return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
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}
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/* Modify PCI: Disable PCI function measurement */
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int zpci_fmb_disable_device(struct zpci_dev *zdev)
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{
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struct mod_pci_args args = { 0, 0, 0, 0 };
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int rc;
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if (!zdev->fmb)
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return -EINVAL;
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/* Function measurement is disabled if fmb address is zero */
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rc = mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
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kmem_cache_free(zdev_fmb_cache, zdev->fmb);
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zdev->fmb = NULL;
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return rc;
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}
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#define ZPCI_PCIAS_CFGSPC 15
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static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
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@ -633,6 +674,7 @@ static void zpci_remove_device(struct pci_dev *pdev)
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dev_info(&pdev->dev, "Removing device %u\n", zdev->domain);
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zdev->state = ZPCI_FN_STATE_CONFIGURED;
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zpci_dma_exit_device(zdev);
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zpci_fmb_disable_device(zdev);
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zpci_sysfs_remove_device(&pdev->dev);
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zpci_unmap_resources(pdev);
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list_del(&zdev->entry); /* can be called from init */
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@ -799,6 +841,16 @@ static void zpci_irq_exit(void)
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kfree(bucket);
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}
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void zpci_debug_info(struct zpci_dev *zdev, struct seq_file *m)
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{
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if (!zdev)
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return;
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seq_printf(m, "global irq retries: %u\n", atomic_read(&irq_retries));
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seq_printf(m, "aibv[0]:%016lx aibv[1]:%016lx aisb:%016lx\n",
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get_imap(0)->aibv, get_imap(1)->aibv, *bucket->aisb);
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}
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static struct resource *zpci_alloc_bus_resource(unsigned long start, unsigned long size,
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unsigned long flags, int domain)
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{
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@ -994,6 +1046,8 @@ int zpci_scan_device(struct zpci_dev *zdev)
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goto out;
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}
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zpci_debug_init_device(zdev);
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zpci_fmb_enable_device(zdev);
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zpci_map_resources(zdev);
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pci_bus_add_devices(zdev->bus);
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@ -1020,6 +1074,11 @@ static int zpci_mem_init(void)
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if (!zdev_irq_cache)
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goto error_zdev;
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zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
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16, 0, NULL);
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if (!zdev_fmb_cache)
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goto error_fmb;
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|
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/* TODO: use realloc */
|
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zpci_iomap_start = kzalloc(ZPCI_IOMAP_MAX_ENTRIES * sizeof(*zpci_iomap_start),
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GFP_KERNEL);
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|
|
@ -1028,6 +1087,8 @@ static int zpci_mem_init(void)
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return 0;
|
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|
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error_iomap:
|
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kmem_cache_destroy(zdev_fmb_cache);
|
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error_fmb:
|
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kmem_cache_destroy(zdev_irq_cache);
|
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error_zdev:
|
||||
return -ENOMEM;
|
||||
|
|
@ -1037,6 +1098,7 @@ static void zpci_mem_exit(void)
|
|||
{
|
||||
kfree(zpci_iomap_start);
|
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kmem_cache_destroy(zdev_irq_cache);
|
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kmem_cache_destroy(zdev_fmb_cache);
|
||||
}
|
||||
|
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unsigned int pci_probe = 1;
|
||||
|
|
@ -1066,6 +1128,10 @@ static int __init pci_base_init(void)
|
|||
test_facility(69), test_facility(70),
|
||||
test_facility(71));
|
||||
|
||||
rc = zpci_debug_init();
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
rc = zpci_mem_init();
|
||||
if (rc)
|
||||
goto out_mem;
|
||||
|
|
@ -1098,6 +1164,7 @@ out_irq:
|
|||
out_hash:
|
||||
zpci_mem_exit();
|
||||
out_mem:
|
||||
zpci_debug_exit();
|
||||
return rc;
|
||||
}
|
||||
subsys_initcall(pci_base_init);
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ static void clp_store_query_pci_fngrp(struct zpci_dev *zdev,
|
|||
zdev->tlb_refresh = response->refresh;
|
||||
zdev->dma_mask = response->dasm;
|
||||
zdev->msi_addr = response->msia;
|
||||
zdev->fmb_update = response->mui;
|
||||
|
||||
pr_debug("Supported number of MSI vectors: %u\n", response->noi);
|
||||
switch (response->version) {
|
||||
|
|
|
|||
|
|
@ -0,0 +1,193 @@
|
|||
/*
|
||||
* Copyright IBM Corp. 2012
|
||||
*
|
||||
* Author(s):
|
||||
* Jan Glauber <jang@linux.vnet.ibm.com>
|
||||
*/
|
||||
|
||||
#define COMPONENT "zPCI"
|
||||
#define pr_fmt(fmt) COMPONENT ": " fmt
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/pci.h>
|
||||
#include <asm/debug.h>
|
||||
|
||||
#include <asm/pci_dma.h>
|
||||
|
||||
static struct dentry *debugfs_root;
|
||||
|
||||
static char *pci_perf_names[] = {
|
||||
/* hardware counters */
|
||||
"Load operations",
|
||||
"Store operations",
|
||||
"Store block operations",
|
||||
"Refresh operations",
|
||||
"DMA read bytes",
|
||||
"DMA write bytes",
|
||||
/* software counters */
|
||||
"Allocated pages",
|
||||
"Mapped pages",
|
||||
"Unmapped pages",
|
||||
};
|
||||
|
||||
static int pci_perf_show(struct seq_file *m, void *v)
|
||||
{
|
||||
struct zpci_dev *zdev = m->private;
|
||||
u64 *stat;
|
||||
int i;
|
||||
|
||||
if (!zdev)
|
||||
return 0;
|
||||
if (!zdev->fmb)
|
||||
return seq_printf(m, "FMB statistics disabled\n");
|
||||
|
||||
/* header */
|
||||
seq_printf(m, "FMB @ %p\n", zdev->fmb);
|
||||
seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update);
|
||||
seq_printf(m, "Samples: %u\n", zdev->fmb->samples);
|
||||
seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update);
|
||||
|
||||
/* hardware counters */
|
||||
stat = (u64 *) &zdev->fmb->ld_ops;
|
||||
for (i = 0; i < 4; i++)
|
||||
seq_printf(m, "%26s:\t%llu\n",
|
||||
pci_perf_names[i], *(stat + i));
|
||||
if (zdev->fmb->dma_valid)
|
||||
for (i = 4; i < 6; i++)
|
||||
seq_printf(m, "%26s:\t%llu\n",
|
||||
pci_perf_names[i], *(stat + i));
|
||||
/* software counters */
|
||||
for (i = 6; i < ARRAY_SIZE(pci_perf_names); i++)
|
||||
seq_printf(m, "%26s:\t%llu\n",
|
||||
pci_perf_names[i],
|
||||
atomic64_read((atomic64_t *) (stat + i)));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf,
|
||||
size_t count, loff_t *off)
|
||||
{
|
||||
struct zpci_dev *zdev = ((struct seq_file *) file->private_data)->private;
|
||||
unsigned long val;
|
||||
int rc;
|
||||
|
||||
if (!zdev)
|
||||
return 0;
|
||||
|
||||
rc = kstrtoul_from_user(ubuf, count, 10, &val);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
switch (val) {
|
||||
case 0:
|
||||
rc = zpci_fmb_disable_device(zdev);
|
||||
if (rc)
|
||||
return rc;
|
||||
break;
|
||||
case 1:
|
||||
rc = zpci_fmb_enable_device(zdev);
|
||||
if (rc)
|
||||
return rc;
|
||||
break;
|
||||
}
|
||||
return count;
|
||||
}
|
||||
|
||||
static int pci_perf_seq_open(struct inode *inode, struct file *filp)
|
||||
{
|
||||
return single_open(filp, pci_perf_show,
|
||||
filp->f_path.dentry->d_inode->i_private);
|
||||
}
|
||||
|
||||
static const struct file_operations debugfs_pci_perf_fops = {
|
||||
.open = pci_perf_seq_open,
|
||||
.read = seq_read,
|
||||
.write = pci_perf_seq_write,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
static int pci_debug_show(struct seq_file *m, void *v)
|
||||
{
|
||||
struct zpci_dev *zdev = m->private;
|
||||
|
||||
zpci_debug_info(zdev, m);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pci_debug_seq_open(struct inode *inode, struct file *filp)
|
||||
{
|
||||
return single_open(filp, pci_debug_show,
|
||||
filp->f_path.dentry->d_inode->i_private);
|
||||
}
|
||||
|
||||
static const struct file_operations debugfs_pci_debug_fops = {
|
||||
.open = pci_debug_seq_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
void zpci_debug_init_device(struct zpci_dev *zdev)
|
||||
{
|
||||
zdev->debugfs_dev = debugfs_create_dir(dev_name(&zdev->pdev->dev),
|
||||
debugfs_root);
|
||||
if (IS_ERR(zdev->debugfs_dev))
|
||||
zdev->debugfs_dev = NULL;
|
||||
|
||||
zdev->debugfs_perf = debugfs_create_file("statistics",
|
||||
S_IFREG | S_IRUGO | S_IWUSR,
|
||||
zdev->debugfs_dev, zdev,
|
||||
&debugfs_pci_perf_fops);
|
||||
if (IS_ERR(zdev->debugfs_perf))
|
||||
zdev->debugfs_perf = NULL;
|
||||
|
||||
zdev->debugfs_debug = debugfs_create_file("debug",
|
||||
S_IFREG | S_IRUGO | S_IWUSR,
|
||||
zdev->debugfs_dev, zdev,
|
||||
&debugfs_pci_debug_fops);
|
||||
if (IS_ERR(zdev->debugfs_debug))
|
||||
zdev->debugfs_debug = NULL;
|
||||
}
|
||||
|
||||
void zpci_debug_exit_device(struct zpci_dev *zdev)
|
||||
{
|
||||
debugfs_remove(zdev->debugfs_perf);
|
||||
debugfs_remove(zdev->debugfs_debug);
|
||||
debugfs_remove(zdev->debugfs_dev);
|
||||
}
|
||||
|
||||
int __init zpci_debug_init(void)
|
||||
{
|
||||
/* event trace buffer */
|
||||
pci_debug_msg_id = debug_register("pci_msg", 16, 1, 16 * sizeof(long));
|
||||
if (!pci_debug_msg_id)
|
||||
return -EINVAL;
|
||||
debug_register_view(pci_debug_msg_id, &debug_sprintf_view);
|
||||
debug_set_level(pci_debug_msg_id, 3);
|
||||
zpci_dbg("Debug view initialized\n");
|
||||
|
||||
/* error log */
|
||||
pci_debug_err_id = debug_register("pci_error", 2, 1, 16);
|
||||
if (!pci_debug_err_id)
|
||||
return -EINVAL;
|
||||
debug_register_view(pci_debug_err_id, &debug_hex_ascii_view);
|
||||
debug_set_level(pci_debug_err_id, 6);
|
||||
zpci_err("Debug view initialized\n");
|
||||
|
||||
debugfs_root = debugfs_create_dir("pci", NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void zpci_debug_exit(void)
|
||||
{
|
||||
if (pci_debug_msg_id)
|
||||
debug_unregister(pci_debug_msg_id);
|
||||
if (pci_debug_err_id)
|
||||
debug_unregister(pci_debug_err_id);
|
||||
|
||||
debugfs_remove(debugfs_root);
|
||||
}
|
||||
|
|
@ -291,8 +291,10 @@ static dma_addr_t s390_dma_map_pages(struct device *dev, struct page *page,
|
|||
if (direction == DMA_NONE || direction == DMA_TO_DEVICE)
|
||||
flags |= ZPCI_TABLE_PROTECTED;
|
||||
|
||||
if (!dma_update_trans(zdev, pa, dma_addr, size, flags))
|
||||
if (!dma_update_trans(zdev, pa, dma_addr, size, flags)) {
|
||||
atomic64_add(nr_pages, (atomic64_t *) &zdev->fmb->mapped_pages);
|
||||
return dma_addr + offset;
|
||||
}
|
||||
|
||||
out_free:
|
||||
dma_free_iommu(zdev, iommu_page_index, nr_pages);
|
||||
|
|
@ -315,6 +317,7 @@ static void s390_dma_unmap_pages(struct device *dev, dma_addr_t dma_addr,
|
|||
ZPCI_TABLE_PROTECTED | ZPCI_PTE_INVALID))
|
||||
dev_err(dev, "Failed to unmap addr: %Lx\n", dma_addr);
|
||||
|
||||
atomic64_add(npages, (atomic64_t *) &zdev->fmb->unmapped_pages);
|
||||
iommu_page_index = (dma_addr - zdev->start_dma) >> PAGE_SHIFT;
|
||||
dma_free_iommu(zdev, iommu_page_index, npages);
|
||||
}
|
||||
|
|
@ -323,6 +326,7 @@ static void *s390_dma_alloc(struct device *dev, size_t size,
|
|||
dma_addr_t *dma_handle, gfp_t flag,
|
||||
struct dma_attrs *attrs)
|
||||
{
|
||||
struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
|
||||
struct page *page;
|
||||
unsigned long pa;
|
||||
dma_addr_t map;
|
||||
|
|
@ -331,6 +335,8 @@ static void *s390_dma_alloc(struct device *dev, size_t size,
|
|||
page = alloc_pages(flag, get_order(size));
|
||||
if (!page)
|
||||
return NULL;
|
||||
|
||||
atomic64_add(size / PAGE_SIZE, (atomic64_t *) &zdev->fmb->allocated_pages);
|
||||
pa = page_to_phys(page);
|
||||
memset((void *) pa, 0, size);
|
||||
|
||||
|
|
|
|||
|
|
@ -45,6 +45,8 @@ static void zpci_event_log_err(struct zpci_ccdf_err *ccdf)
|
|||
{
|
||||
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
|
||||
|
||||
zpci_err("SEI error CCD:\n");
|
||||
zpci_err_hex(ccdf, sizeof(*ccdf));
|
||||
dev_err(&zdev->pdev->dev, "event code: 0x%x\n", ccdf->pec);
|
||||
}
|
||||
|
||||
|
|
|
|||
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