From 92820a5f99748b02a3713a314d81e2fd0b6b2f80 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Thu, 23 May 2013 11:55:07 +0200 Subject: s390: remove virt_to_phys implementation virt_to_phys on s390 currently uses the LRA instruction to translate virtual to physical addresses. This creates an unnecessary overhead and caused trouble with dma debugging code (when called with an address pointing to a already unmapped page). Just get rid of s390's implementation and use the one from asm-generic/io.h . Note: with this change virt_to_phys will no longer work on vmalloc'ed addresses. Reviewed-by: Gerald Schaefer Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/io.h | 22 ---------------------- 1 file changed, 22 deletions(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h index fd9be010f9b2..cd6b9ee7b69c 100644 --- a/arch/s390/include/asm/io.h +++ b/arch/s390/include/asm/io.h @@ -13,28 +13,6 @@ #include #include -/* - * Change virtual addresses to physical addresses and vv. - * These are pretty trivial - */ -static inline unsigned long virt_to_phys(volatile void * address) -{ - unsigned long real_address; - asm volatile( - " lra %0,0(%1)\n" - " jz 0f\n" - " la %0,0\n" - "0:" - : "=a" (real_address) : "a" (address) : "cc"); - return real_address; -} -#define virt_to_phys virt_to_phys - -static inline void * phys_to_virt(unsigned long address) -{ - return (void *) address; -} - void *xlate_dev_mem_ptr(unsigned long phys); #define xlate_dev_mem_ptr xlate_dev_mem_ptr void unxlate_dev_mem_ptr(unsigned long phys, void *addr); -- cgit v1.2.1 From 24d5dd0208ed1cd3ef6bf30a50b347ef366f21ac Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Mon, 27 May 2013 10:42:04 +0200 Subject: s390/kvm: Provide function for setting the guest storage key From time to time we need to set the guest storage key. Lets provide a helper function that handles the changes with all the right locking and checking. Signed-off-by: Christian Borntraeger Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/pgalloc.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h index 590c3219c634..e1408ddb94f8 100644 --- a/arch/s390/include/asm/pgalloc.h +++ b/arch/s390/include/asm/pgalloc.h @@ -22,6 +22,9 @@ unsigned long *page_table_alloc(struct mm_struct *, unsigned long); void page_table_free(struct mm_struct *, unsigned long *); void page_table_free_rcu(struct mmu_gather *, unsigned long *); +int set_guest_storage_key(struct mm_struct *mm, unsigned long addr, + unsigned long key, bool nq); + static inline void clear_table(unsigned long *s, unsigned long val, size_t n) { typedef struct { char _[n]; } addrtype; -- cgit v1.2.1 From 4bee2a5dce45096851cb8694d962bf8c016816a8 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Wed, 5 Jun 2013 16:06:42 +0200 Subject: s390/pci: cleanup hotplug code Provide wrappers for the [de]configure operations, add some error handling, and use pci_scan_slot instead of pci_scan_single_device. Reviewed-by: Gerald Schaefer Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/pci.h | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index 6c1801235db9..be41f4f885ce 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -143,7 +143,6 @@ int zpci_enable_device(struct zpci_dev *); int zpci_disable_device(struct zpci_dev *); void zpci_stop_device(struct zpci_dev *); void zpci_free_device(struct zpci_dev *); -int zpci_scan_device(struct zpci_dev *); int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); int zpci_unregister_ioat(struct zpci_dev *, u8); -- cgit v1.2.1 From 64150adf89df2ed165d6760f414fa6df07d22628 Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Thu, 6 Jun 2013 09:44:28 +0200 Subject: s390/cio: Introduce generic synchronous CHSC IOCTL This patch adds a new ioctl CHSC_START_SYNC that allows to execute any synchronous CHSC that is provided by user space. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- arch/s390/include/uapi/asm/chsc.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/s390/include') diff --git a/arch/s390/include/uapi/asm/chsc.h b/arch/s390/include/uapi/asm/chsc.h index 1c6a7f85a581..6e5307fbeb1e 100644 --- a/arch/s390/include/uapi/asm/chsc.h +++ b/arch/s390/include/uapi/asm/chsc.h @@ -29,6 +29,16 @@ struct chsc_async_area { __u8 data[CHSC_SIZE - sizeof(struct chsc_async_header)]; } __attribute__ ((packed)); +struct chsc_header { + __u16 length; + __u16 code; +} __attribute__ ((packed)); + +struct chsc_sync_area { + struct chsc_header header; + __u8 data[CHSC_SIZE - sizeof(struct chsc_header)]; +} __attribute__ ((packed)); + struct chsc_response_struct { __u16 length; __u16 code; @@ -126,5 +136,6 @@ struct chsc_cpd_info { #define CHSC_INFO_CCL _IOWR(CHSC_IOCTL_MAGIC, 0x86, struct chsc_comp_list) #define CHSC_INFO_CPD _IOWR(CHSC_IOCTL_MAGIC, 0x87, struct chsc_cpd_info) #define CHSC_INFO_DCAL _IOWR(CHSC_IOCTL_MAGIC, 0x88, struct chsc_dcal) +#define CHSC_START_SYNC _IOWR(CHSC_IOCTL_MAGIC, 0x89, struct chsc_sync_area) #endif -- cgit v1.2.1 From e9a8f32a98a6099b009ea7da4f299bb5427db126 Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Thu, 6 Jun 2013 09:50:21 +0200 Subject: s390/cio: Introduce on-close CHSC IOCTLs Introduce two new ioctls CHSC_ON_CLOSE_SET and CHSC_ON_CLOSE_REMOVE that allow to add and remove one CHSC that is unconditionally executed when the CHSC device node is closed. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- arch/s390/include/uapi/asm/chsc.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/s390/include') diff --git a/arch/s390/include/uapi/asm/chsc.h b/arch/s390/include/uapi/asm/chsc.h index 6e5307fbeb1e..65dc694725a8 100644 --- a/arch/s390/include/uapi/asm/chsc.h +++ b/arch/s390/include/uapi/asm/chsc.h @@ -137,5 +137,7 @@ struct chsc_cpd_info { #define CHSC_INFO_CPD _IOWR(CHSC_IOCTL_MAGIC, 0x87, struct chsc_cpd_info) #define CHSC_INFO_DCAL _IOWR(CHSC_IOCTL_MAGIC, 0x88, struct chsc_dcal) #define CHSC_START_SYNC _IOWR(CHSC_IOCTL_MAGIC, 0x89, struct chsc_sync_area) +#define CHSC_ON_CLOSE_SET _IOWR(CHSC_IOCTL_MAGIC, 0x8a, struct chsc_async_area) +#define CHSC_ON_CLOSE_REMOVE _IO(CHSC_IOCTL_MAGIC, 0x8b) #endif -- cgit v1.2.1 From d475f942b1dd6a897dac3ad4ed98d6994b275378 Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Thu, 6 Jun 2013 09:52:08 +0200 Subject: s390/sclp: Add SCLP character device driver Add a character misc device "sclp_ctl" that allows to run SCCBs from user space using the SCLP_CTL_SCCB ioctl. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- arch/s390/include/uapi/asm/Kbuild | 1 + arch/s390/include/uapi/asm/sclp_ctl.h | 24 ++++++++++++++++++++++++ 2 files changed, 25 insertions(+) create mode 100644 arch/s390/include/uapi/asm/sclp_ctl.h (limited to 'arch/s390/include') diff --git a/arch/s390/include/uapi/asm/Kbuild b/arch/s390/include/uapi/asm/Kbuild index 9ccd1905bdad..6a9a9eb645f5 100644 --- a/arch/s390/include/uapi/asm/Kbuild +++ b/arch/s390/include/uapi/asm/Kbuild @@ -35,6 +35,7 @@ header-y += siginfo.h header-y += signal.h header-y += socket.h header-y += sockios.h +header-y += sclp_ctl.h header-y += stat.h header-y += statfs.h header-y += swab.h diff --git a/arch/s390/include/uapi/asm/sclp_ctl.h b/arch/s390/include/uapi/asm/sclp_ctl.h new file mode 100644 index 000000000000..f2818613ee41 --- /dev/null +++ b/arch/s390/include/uapi/asm/sclp_ctl.h @@ -0,0 +1,24 @@ +/* + * IOCTL interface for SCLP + * + * Copyright IBM Corp. 2012 + * + * Author: Michael Holzheu + */ + +#ifndef _ASM_SCLP_CTL_H +#define _ASM_SCLP_CTL_H + +#include + +struct sclp_ctl_sccb { + __u32 cmdw; + __u64 sccb; +} __attribute__((packed)); + +#define SCLP_CTL_IOCTL_MAGIC 0x10 + +#define SCLP_CTL_SCCB \ + _IOWR(SCLP_CTL_IOCTL_MAGIC, 0x10, struct sclp_ctl_sccb) + +#endif -- cgit v1.2.1 From 48f6b00c6e3190b786c44731b25ac124c81c2247 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Mon, 17 Jun 2013 14:54:02 +0200 Subject: s390/irq: store interrupt information in pt_regs Copy the interrupt parameters from the lowcore to the pt_regs structure in entry[64].S and reduce the arguments of the low level interrupt handler to the pt_regs pointer only. In addition move the test-pending-interrupt loop from do_IRQ to entry[64].S to make sure that interrupt information is always delivered via pt_regs. Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/ptrace.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h index 559512a455da..52b56533c57c 100644 --- a/arch/s390/include/asm/ptrace.h +++ b/arch/s390/include/asm/ptrace.h @@ -24,6 +24,7 @@ struct pt_regs unsigned long gprs[NUM_GPRS]; unsigned long orig_gpr2; unsigned int int_code; + unsigned int int_parm; unsigned long int_parm_long; }; -- cgit v1.2.1 From 32089246e36dffbadba66fc94a246678fccfd5a2 Mon Sep 17 00:00:00 2001 From: Michael Mueller Date: Thu, 20 Jun 2013 15:11:39 +0200 Subject: s390/facility: decompose test_facility() The patch decomposes the function test_facility() into its API test_facility() and its implementation __test_facility(). This allows to reuse the implementation with a different API. Patch is used to prepare checkin of SIE satellite code. Signed-off-by: Michael Mueller Acked-by: Cornelia Huck Acked-by: Christian Borntraeger Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/facility.h | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/facility.h b/arch/s390/include/asm/facility.h index 2ee66a65f2d4..0aa6a7ed95a3 100644 --- a/arch/s390/include/asm/facility.h +++ b/arch/s390/include/asm/facility.h @@ -13,6 +13,16 @@ #define MAX_FACILITY_BIT (256*8) /* stfle_fac_list has 256 bytes */ +static inline int __test_facility(unsigned long nr, void *facilities) +{ + unsigned char *ptr; + + if (nr >= MAX_FACILITY_BIT) + return 0; + ptr = (unsigned char *) facilities + (nr >> 3); + return (*ptr & (0x80 >> (nr & 7))) != 0; +} + /* * The test_facility function uses the bit odering where the MSB is bit 0. * That makes it easier to query facility bits with the bit number as @@ -20,12 +30,7 @@ */ static inline int test_facility(unsigned long nr) { - unsigned char *ptr; - - if (nr >= MAX_FACILITY_BIT) - return 0; - ptr = (unsigned char *) &S390_lowcore.stfle_fac_list + (nr >> 3); - return (*ptr & (0x80 >> (nr & 7))) != 0; + return __test_facility(nr, &S390_lowcore.stfle_fac_list); } /** -- cgit v1.2.1 From a9a5250cc650b54623827386247b85ba2aeeecc7 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Fri, 21 Jun 2013 19:00:27 +0200 Subject: s390/dma: remove gratuitous brackets Remove gratuitous brackets in dma_mapping_error. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/dma-mapping.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/dma-mapping.h b/arch/s390/include/asm/dma-mapping.h index 2f8c1abeb086..3fbc67d9e197 100644 --- a/arch/s390/include/asm/dma-mapping.h +++ b/arch/s390/include/asm/dma-mapping.h @@ -53,7 +53,7 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) debug_dma_mapping_error(dev, dma_addr); if (dma_ops->mapping_error) return dma_ops->mapping_error(dev, dma_addr); - return (dma_addr == DMA_ERROR_CODE); + return dma_addr == DMA_ERROR_CODE; } static inline void *dma_alloc_coherent(struct device *dev, size_t size, -- cgit v1.2.1 From 386aa051fb4b6298c23996e68b7c92f186e484b6 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Wed, 19 Jun 2013 14:26:46 +0200 Subject: s390/pci: remove per device debug attribute The per-pci-device 'debug' attribute is ill defined. For each device it prints the same information, the adapter interrupt bit vector for irq numbers 0 & 1, the start of the global interrupt summary vector and the global irq retries counter. Just remove the attribute and the associated code. Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/pci.h | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index be41f4f885ce..6e577ba0e5da 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -120,7 +120,6 @@ struct zpci_dev { struct dentry *debugfs_dev; struct dentry *debugfs_perf; - struct dentry *debugfs_debug; }; struct pci_hp_callback_ops { -- cgit v1.2.1 From f4eae94f71372ea5ec1ba17a85f3aebedc516ca8 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Mon, 24 Jun 2013 10:30:41 +0200 Subject: s390/airq: simplify adapter interrupt code There are three users of adapter interrupts: AP, QDIO and PCI. Each registers a single adapter interrupt with independent ISCs. Define a "struct airq" with the interrupt handler, a pointer and a mask for the local summary indicator and the ISC for the adapter interrupt source. Convert the indicator array with its fixed number of adapter interrupt sources per ISE to an array of hlists. This removes the limitation to 32 adapter interrupts per ISC and allows for arbitrary memory locations for the local summary indicator. Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/airq.h | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/airq.h b/arch/s390/include/asm/airq.h index 9819891ed7a2..4066cee0c2d2 100644 --- a/arch/s390/include/asm/airq.h +++ b/arch/s390/include/asm/airq.h @@ -9,9 +9,18 @@ #ifndef _ASM_S390_AIRQ_H #define _ASM_S390_AIRQ_H -typedef void (*adapter_int_handler_t)(void *, void *); +struct airq_struct { + struct hlist_node list; /* Handler queueing. */ + void (*handler)(struct airq_struct *); /* Thin-interrupt handler */ + u8 *lsi_ptr; /* Local-Summary-Indicator pointer */ + u8 lsi_mask; /* Local-Summary-Indicator mask */ + u8 isc; /* Interrupt-subclass */ + u8 flags; +}; -void *s390_register_adapter_interrupt(adapter_int_handler_t, void *, u8); -void s390_unregister_adapter_interrupt(void *, u8); +#define AIRQ_PTR_ALLOCATED 0x01 + +int register_adapter_interrupt(struct airq_struct *airq); +void unregister_adapter_interrupt(struct airq_struct *airq); #endif /* _ASM_S390_AIRQ_H */ -- cgit v1.2.1 From 5ea34a01423a27d4526f3551e8542f2f991bd4a0 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Wed, 30 Jan 2013 09:26:19 +0000 Subject: s390/dasd: Fail all requests when DASD_FLAG_ABORTIO is set Whenever a DASD request encounters a timeout we might need to abort all outstanding requests on this or even other devices. This is especially useful if one wants to fail all devices on one side of a RAID10 configuration, even though only one device exhibited an error. To handle this I've introduced a new device flag DASD_FLAG_ABORTIO. This flag is evaluated in __dasd_process_request_queue() and will invoke blk_abort_request() for all outstanding requests with DASD_CQR_FLAGS_FAILFAST set. This will cause any of these requests to be aborted immediately if the blk_timeout function is activated. The DASD_FLAG_ABORTIO is also evaluated in __dasd_process_request_queue to abort all new request which would have the DASD_CQR_FLAGS_FAILFAST bit set. The flag can be set with the new ioctls 'BIODASDABORTIO' and removed with 'BIODASDALLOWIO'. Signed-off-by: Hannes Reinecke Signed-off-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky --- arch/s390/include/uapi/asm/dasd.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/s390/include') diff --git a/arch/s390/include/uapi/asm/dasd.h b/arch/s390/include/uapi/asm/dasd.h index 38eca3ba40e2..5812a3b2df9e 100644 --- a/arch/s390/include/uapi/asm/dasd.h +++ b/arch/s390/include/uapi/asm/dasd.h @@ -261,6 +261,10 @@ struct dasd_snid_ioctl_data { #define BIODASDQUIESCE _IO(DASD_IOCTL_LETTER,6) /* Resume IO on device */ #define BIODASDRESUME _IO(DASD_IOCTL_LETTER,7) +/* Abort all I/O on a device */ +#define BIODASDABORTIO _IO(DASD_IOCTL_LETTER, 240) +/* Allow I/O on a device */ +#define BIODASDALLOWIO _IO(DASD_IOCTL_LETTER, 241) /* retrieve API version number */ -- cgit v1.2.1