diff options
40 files changed, 1031 insertions, 417 deletions
diff --git a/Documentation/devicetree/bindings/video/simple-framebuffer.txt b/Documentation/devicetree/bindings/video/simple-framebuffer.txt new file mode 100644 index 000000000000..3ea460583111 --- /dev/null +++ b/Documentation/devicetree/bindings/video/simple-framebuffer.txt @@ -0,0 +1,25 @@ +Simple Framebuffer + +A simple frame-buffer describes a raw memory region that may be rendered to, +with the assumption that the display hardware has already been set up to scan +out from that buffer. + +Required properties: +- compatible: "simple-framebuffer" +- reg: Should contain the location and size of the framebuffer memory. +- width: The width of the framebuffer in pixels. +- height: The height of the framebuffer in pixels. +- stride: The number of bytes in each line of the framebuffer. +- format: The format of the framebuffer surface. Valid values are: + - r5g6b5 (16-bit pixels, d[15:11]=r, d[10:5]=g, d[4:0]=b). + +Example: + + framebuffer { + compatible = "simple-framebuffer"; + reg = <0x1d385000 (1600 * 1200 * 2)>; + width = <1600>; + height = <1200>; + stride = <(1600 * 2)>; + format = "r5g6b5"; + }; diff --git a/Documentation/rapidio/rapidio.txt b/Documentation/rapidio/rapidio.txt index c75694b35d08..a9c16c979da2 100644 --- a/Documentation/rapidio/rapidio.txt +++ b/Documentation/rapidio/rapidio.txt @@ -79,20 +79,63 @@ master port that is used to communicate with devices within the network. In order to initialize the RapidIO subsystem, a platform must initialize and register at least one master port within the RapidIO network. To register mport within the subsystem controller driver initialization code calls function -rio_register_mport() for each available master port. After all active master -ports are registered with a RapidIO subsystem, the rio_init_mports() routine -is called to perform enumeration and discovery. +rio_register_mport() for each available master port. -In the current PowerPC-based implementation a subsys_initcall() is specified to -perform controller initialization and mport registration. At the end it directly -calls rio_init_mports() to execute RapidIO enumeration and discovery. +RapidIO subsystem uses subsys_initcall() or device_initcall() to perform +controller initialization (depending on controller device type). + +After all active master ports are registered with a RapidIO subsystem, +an enumeration and/or discovery routine may be called automatically or +by user-space command. 4. Enumeration and Discovery ---------------------------- -When rio_init_mports() is called it scans a list of registered master ports and -calls an enumeration or discovery routine depending on the configured role of a -master port: host or agent. +4.1 Overview +------------ + +RapidIO subsystem configuration options allow users to specify enumeration and +discovery methods as statically linked components or loadable modules. +An enumeration/discovery method implementation and available input parameters +define how any given method can be attached to available RapidIO mports: +simply to all available mports OR individually to the specified mport device. + +Depending on selected enumeration/discovery build configuration, there are +several methods to initiate an enumeration and/or discovery process: + + (a) Statically linked enumeration and discovery process can be started + automatically during kernel initialization time using corresponding module + parameters. This was the original method used since introduction of RapidIO + subsystem. Now this method relies on enumerator module parameter which is + 'rio-scan.scan' for existing basic enumeration/discovery method. + When automatic start of enumeration/discovery is used a user has to ensure + that all discovering endpoints are started before the enumerating endpoint + and are waiting for enumeration to be completed. + Configuration option CONFIG_RAPIDIO_DISC_TIMEOUT defines time that discovering + endpoint waits for enumeration to be completed. If the specified timeout + expires the discovery process is terminated without obtaining RapidIO network + information. NOTE: a timed out discovery process may be restarted later using + a user-space command as it is described later if the given endpoint was + enumerated successfully. + + (b) Statically linked enumeration and discovery process can be started by + a command from user space. This initiation method provides more flexibility + for a system startup compared to the option (a) above. After all participating + endpoints have been successfully booted, an enumeration process shall be + started first by issuing a user-space command, after an enumeration is + completed a discovery process can be started on all remaining endpoints. + + (c) Modular enumeration and discovery process can be started by a command from + user space. After an enumeration/discovery module is loaded, a network scan + process can be started by issuing a user-space command. + Similar to the option (b) above, an enumerator has to be started first. + + (d) Modular enumeration and discovery process can be started by a module + initialization routine. In this case an enumerating module shall be loaded + first. + +When a network scan process is started it calls an enumeration or discovery +routine depending on the configured role of a master port: host or agent. Enumeration is performed by a master port if it is configured as a host port by assigning a host device ID greater than or equal to zero. A host device ID is @@ -104,8 +147,58 @@ for it. The enumeration and discovery routines use RapidIO maintenance transactions to access the configuration space of devices. -The enumeration process is implemented according to the enumeration algorithm -outlined in the RapidIO Interconnect Specification: Annex I [1]. +4.2 Automatic Start of Enumeration and Discovery +------------------------------------------------ + +Automatic enumeration/discovery start method is applicable only to built-in +enumeration/discovery RapidIO configuration selection. To enable automatic +enumeration/discovery start by existing basic enumerator method set use boot +command line parameter "rio-scan.scan=1". + +This configuration requires synchronized start of all RapidIO endpoints that +form a network which will be enumerated/discovered. Discovering endpoints have +to be started before an enumeration starts to ensure that all RapidIO +controllers have been initialized and are ready to be discovered. Configuration +parameter CONFIG_RAPIDIO_DISC_TIMEOUT defines time (in seconds) which +a discovering endpoint will wait for enumeration to be completed. + +When automatic enumeration/discovery start is selected, basic method's +initialization routine calls rio_init_mports() to perform enumeration or +discovery for all known mport devices. + +Depending on RapidIO network size and configuration this automatic +enumeration/discovery start method may be difficult to use due to the +requirement for synchronized start of all endpoints. + +4.3 User-space Start of Enumeration and Discovery +------------------------------------------------- + +User-space start of enumeration and discovery can be used with built-in and +modular build configurations. For user-space controlled start RapidIO subsystem +creates the sysfs write-only attribute file '/sys/bus/rapidio/scan'. To initiate +an enumeration or discovery process on specific mport device, a user needs to +write mport_ID (not RapidIO destination ID) into that file. The mport_ID is a +sequential number (0 ... RIO_MAX_MPORTS) assigned during mport device +registration. For example for machine with single RapidIO controller, mport_ID +for that controller always will be 0. + +To initiate RapidIO enumeration/discovery on all available mports a user may +write '-1' (or RIO_MPORT_ANY) into the scan attribute file. + +4.4 Basic Enumeration Method +---------------------------- + +This is an original enumeration/discovery method which is available since +first release of RapidIO subsystem code. The enumeration process is +implemented according to the enumeration algorithm outlined in the RapidIO +Interconnect Specification: Annex I [1]. + +This method can be configured as statically linked or loadable module. +The method's single parameter "scan" allows to trigger the enumeration/discovery +process from module initialization routine. + +This enumeration/discovery method can be started only once and does not support +unloading if it is built as a module. The enumeration process traverses the network using a recursive depth-first algorithm. When a new device is found, the enumerator takes ownership of that @@ -160,6 +253,19 @@ time period. If this wait time period expires before enumeration is completed, an agent skips RapidIO discovery and continues with remaining kernel initialization. +4.5 Adding New Enumeration/Discovery Method +------------------------------------------- + +RapidIO subsystem code organization allows addition of new enumeration/discovery +methods as new configuration options without significant impact to to the core +RapidIO code. + +A new enumeration/discovery method has to be attached to one or more mport +devices before an enumeration/discovery process can be started. Normally, +method's module initialization routine calls rio_register_scan() to attach +an enumerator to a specified mport device (or devices). The basic enumerator +implementation demonstrates this process. + 5. References ------------- diff --git a/Documentation/rapidio/sysfs.txt b/Documentation/rapidio/sysfs.txt index 97f71ce575d6..19878179da4c 100644 --- a/Documentation/rapidio/sysfs.txt +++ b/Documentation/rapidio/sysfs.txt @@ -88,3 +88,20 @@ that exports additional attributes. IDT_GEN2: errlog - reads contents of device error log until it is empty. + + +5. RapidIO Bus Attributes +------------------------- + +RapidIO bus subdirectory /sys/bus/rapidio implements the following bus-specific +attribute: + + scan - allows to trigger enumeration discovery process from user space. This + is a write-only attribute. To initiate an enumeration or discovery + process on specific mport device, a user needs to write mport_ID (not + RapidIO destination ID) into this file. The mport_ID is a sequential + number (0 ... RIO_MAX_MPORTS) assigned to the mport device. + For example, for a machine with a single RapidIO controller, mport_ID + for that controller always will be 0. + To initiate RapidIO enumeration/discovery on all available mports + a user must write '-1' (or RIO_MPORT_ANY) into this attribute file. diff --git a/drivers/block/brd.c b/drivers/block/brd.c index f1a29f8e9d33..9bf4371755f2 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -117,13 +117,13 @@ static struct page *brd_insert_page(struct brd_device *brd, sector_t sector) spin_lock(&brd->brd_lock); idx = sector >> PAGE_SECTORS_SHIFT; + page->index = idx; if (radix_tree_insert(&brd->brd_pages, idx, page)) { __free_page(page); page = radix_tree_lookup(&brd->brd_pages, idx); BUG_ON(!page); BUG_ON(page->index != idx); - } else - page->index = idx; + } spin_unlock(&brd->brd_lock); radix_tree_preload_end(); diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c index f8ef15f37c5e..3fd130fdfbc1 100644 --- a/drivers/block/xsysace.c +++ b/drivers/block/xsysace.c @@ -1160,8 +1160,7 @@ static int ace_probe(struct platform_device *dev) dev_dbg(&dev->dev, "ace_probe(%p)\n", dev); /* device id and bus width */ - of_property_read_u32(dev->dev.of_node, "port-number", &id); - if (id < 0) + if (of_property_read_u32(dev->dev.of_node, "port-number", &id)) id = 0; if (of_find_property(dev->dev.of_node, "8-bit", NULL)) bus_width = ACE_BUS_WIDTH_8; diff --git a/drivers/char/random.c b/drivers/char/random.c index cd9a6211dcad..35487e8ded59 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -865,16 +865,24 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min, if (r->entropy_count / 8 < min + reserved) { nbytes = 0; } else { + int entropy_count, orig; +retry: + entropy_count = orig = ACCESS_ONCE(r->entropy_count); /* If limited, never pull more than available */ - if (r->limit && nbytes + reserved >= r->entropy_count / 8) - nbytes = r->entropy_count/8 - reserved; - - if (r->entropy_count / 8 >= nbytes + reserved) - r->entropy_count -= nbytes*8; - else - r->entropy_count = reserved; + if (r->limit && nbytes + reserved >= entropy_count / 8) + nbytes = entropy_count/8 - reserved; + + if (entropy_count / 8 >= nbytes + reserved) { + entropy_count -= nbytes*8; + if (cmpxchg(&r->entropy_count, orig, entropy_count) != orig) + goto retry; + } else { + entropy_count = reserved; + if (cmpxchg(&r->entropy_count, orig, entropy_count) != orig) + goto retry; + } - if (r->entropy_count < random_write_wakeup_thresh) + if (entropy_count < random_write_wakeup_thresh) wakeup_write = 1; } @@ -957,10 +965,23 @@ static ssize_t extract_entropy(struct entropy_store *r, void *buf, { ssize_t ret = 0, i; __u8 tmp[EXTRACT_SIZE]; + unsigned long flags; /* if last_data isn't primed, we need EXTRACT_SIZE extra bytes */ - if (fips_enabled && !r->last_data_init) - nbytes += EXTRACT_SIZE; + if (fips_enabled) { + spin_lock_irqsave(&r->lock, flags); + if (!r->last_data_init) { + r->last_data_init = true; + spin_unlock_irqrestore(&r->lock, flags); + trace_extract_entropy(r->name, EXTRACT_SIZE, + r->entropy_count, _RET_IP_); + xfer_secondary_pool(r, EXTRACT_SIZE); + extract_buf(r, tmp); + spin_lock_irqsave(&r->lock, flags); + memcpy(r->last_data, tmp, EXTRACT_SIZE); + } + spin_unlock_irqrestore(&r->lock, flags); + } trace_extract_entropy(r->name, nbytes, r->entropy_count, _RET_IP_); xfer_secondary_pool(r, nbytes); @@ -970,19 +991,6 @@ static ssize_t extract_entropy(struct entropy_store *r, void *buf, extract_buf(r, tmp); if (fips_enabled) { - unsigned long flags; - - - /* prime last_data value if need be, per fips 140-2 */ - if (!r->last_data_init) { - spin_lock_irqsave(&r->lock, flags); - memcpy(r->last_data, tmp, EXTRACT_SIZE); - r->last_data_init = true; - nbytes -= EXTRACT_SIZE; - spin_unlock_irqrestore(&r->lock, flags); - extract_buf(r, tmp); - } - spin_lock_irqsave(&r->lock, flags); if (!memcmp(tmp, r->last_data, EXTRACT_SIZE)) panic("Hardware RNG duplicated output!\n"); diff --git a/drivers/leds/leds-ot200.c b/drivers/leds/leds-ot200.c index ee14662ed5ce..98cae529373f 100644 --- a/drivers/leds/leds-ot200.c +++ b/drivers/leds/leds-ot200.c @@ -47,37 +47,37 @@ static struct ot200_led leds[] = { { .name = "led_1", .port = 0x49, - .mask = BIT(7), + .mask = BIT(6), }, { .name = "led_2", .port = 0x49, - .mask = BIT(6), + .mask = BIT(5), }, { .name = "led_3", .port = 0x49, - .mask = BIT(5), + .mask = BIT(4), }, { .name = "led_4", .port = 0x49, - .mask = BIT(4), + .mask = BIT(3), }, { .name = "led_5", .port = 0x49, - .mask = BIT(3), + .mask = BIT(2), }, { .name = "led_6", .port = 0x49, - .mask = BIT(2), + .mask = BIT(1), }, { .name = "led_7", .port = 0x49, - .mask = BIT(1), + .mask = BIT(0), } }; diff --git a/drivers/rapidio/Kconfig b/drivers/rapidio/Kconfig index 6194d35ebb97..5ab056494bbe 100644 --- a/drivers/rapidio/Kconfig +++ b/drivers/rapidio/Kconfig @@ -47,4 +47,24 @@ config RAPIDIO_DEBUG If you are unsure about this, say N here. +choice + prompt "Enumeration method" + depends on RAPIDIO + default RAPIDIO_ENUM_BASIC + help + There are different enumeration and discovery mechanisms offered + for RapidIO subsystem. You may select single built-in method or + or any number of methods to be built as modules. + Selecting a built-in method disables use of loadable methods. + + If unsure, select Basic built-in. + +config RAPIDIO_ENUM_BASIC + tristate "Basic" + help + This option includes basic RapidIO fabric enumeration and discovery + mechanism similar to one described in RapidIO specification Annex 1. + +endchoice + source "drivers/rapidio/switches/Kconfig" diff --git a/drivers/rapidio/Makefile b/drivers/rapidio/Makefile index ec3fb8121004..3036702ffe8b 100644 --- a/drivers/rapidio/Makefile +++ b/drivers/rapidio/Makefile @@ -1,7 +1,8 @@ # # Makefile for RapidIO interconnect services # -obj-y += rio.o rio-access.o rio-driver.o rio-scan.o rio-sysfs.o +obj-y += rio.o rio-access.o rio-driver.o rio-sysfs.o +obj-$(CONFIG_RAPIDIO_ENUM_BASIC) += rio-scan.o obj-$(CONFIG_RAPIDIO) += switches/ obj-$(CONFIG_RAPIDIO) += devices/ diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c index 6faba406b6e9..a8b2c23a7ef4 100644 --- a/drivers/rapidio/devices/tsi721.c +++ b/drivers/rapidio/devices/tsi721.c @@ -471,6 +471,10 @@ static irqreturn_t tsi721_irqhandler(int irq, void *ptr) u32 intval; u32 ch_inte; + /* For MSI mode disable all device-level interrupts */ + if (priv->flags & TSI721_USING_MSI) + iowrite32(0, priv->regs + TSI721_DEV_INTE); + dev_int = ioread32(priv->regs + TSI721_DEV_INT); if (!dev_int) return IRQ_NONE; @@ -560,6 +564,14 @@ static irqreturn_t tsi721_irqhandler(int irq, void *ptr) } } #endif + + /* For MSI mode re-enable device-level interrupts */ + if (priv->flags & TSI721_USING_MSI) { + dev_int = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO | + TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH; + iowrite32(dev_int, priv->regs + TSI721_DEV_INTE); + } + return IRQ_HANDLED; } diff --git a/drivers/rapidio/rio-driver.c b/drivers/rapidio/rio-driver.c index 0f4a53bdaa3c..a0c875563d76 100644 --- a/drivers/rapidio/rio-driver.c +++ b/drivers/rapidio/rio-driver.c @@ -164,6 +164,13 @@ void rio_unregister_driver(struct rio_driver *rdrv) driver_unregister(&rdrv->driver); } +void rio_attach_device(struct rio_dev *rdev) +{ + rdev->dev.bus = &rio_bus_type; + rdev->dev.parent = &rio_bus; +} +EXPORT_SYMBOL_GPL(rio_attach_device); + /** * rio_match_bus - Tell if a RIO device structure has a matching RIO driver device id structure * @dev: the standard device structure to match against @@ -200,6 +207,7 @@ struct bus_type rio_bus_type = { .name = "rapidio", .match = rio_match_bus, .dev_attrs = rio_dev_attrs, + .bus_attrs = rio_bus_attrs, .probe = rio_device_probe, .remove = rio_device_remove, }; diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c index a965acd3c0e4..4c15dbf81087 100644 --- a/drivers/rapidio/rio-scan.c +++ b/drivers/rapidio/rio-scan.c @@ -37,12 +37,8 @@ #include "rio.h" -LIST_HEAD(rio_devices); - static void rio_init_em(struct rio_dev *rdev); -DEFINE_SPINLOCK(rio_global_list_lock); - static int next_destid = 0; static int next_comptag = 1; @@ -327,127 +323,6 @@ static int rio_is_switch(struct rio_dev *rdev) } /** - * rio_switch_init - Sets switch operations for a particular vendor switch - * @rdev: RIO device - * @do_enum: Enumeration/Discovery mode flag - * - * Searches the RIO switch ops table for known switch types. If the vid - * and did match a switch table entry, then call switch initialization - * routine to setup switch-specific routines. - */ -static void rio_switch_init(struct rio_dev *rdev, int do_enum) -{ - struct rio_switch_ops *cur = __start_rio_switch_ops; - struct rio_switch_ops *end = __end_rio_switch_ops; - - while (cur < end) { - if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) { - pr_debug("RIO: calling init routine for %s\n", - rio_name(rdev)); - cur->init_hook(rdev, do_enum); - break; - } - cur++; - } - - if ((cur >= end) && (rdev->pef & RIO_PEF_STD_RT)) { - pr_debug("RIO: adding STD routing ops for %s\n", - rio_name(rdev)); - rdev->rswitch->add_entry = rio_std_route_add_entry; - rdev->rswitch->get_entry = rio_std_route_get_entry; - rdev->rswitch->clr_table = rio_std_route_clr_table; - } - - if (!rdev->rswitch->add_entry || !rdev->rswitch->get_entry) - printk(KERN_ERR "RIO: missing routing ops for %s\n", - rio_name(rdev)); -} - -/** - * rio_add_device- Adds a RIO device to the device model - * @rdev: RIO device - * - * Adds the RIO device to the global device list and adds the RIO - * device to the RIO device list. Creates the generic sysfs nodes - * for an RIO device. - */ -static int rio_add_device(struct rio_dev *rdev) -{ - int err; - - err = device_add(&rdev->dev); - if (err) - return err; - - spin_lock(&rio_global_list_lock); - list_add_tail(&rdev->global_list, &rio_devices); - spin_unlock(&rio_global_list_lock); - - rio_create_sysfs_dev_files(rdev); - - return 0; -} - -/** - * rio_enable_rx_tx_port - enable input receiver and output transmitter of - * given port - * @port: Master port associated with the RIO network - * @local: local=1 select local port otherwise a far device is reached - * @destid: Destination ID of the device to check host bit - * @hopcount: Number of hops to reach the target - * @port_num: Port (-number on switch) to enable on a far end device - * - * Returns 0 or 1 from on General Control Command and Status Register - * (EXT_PTR+0x3C) - */ -inline int rio_enable_rx_tx_port(struct rio_mport *port, - int local, u16 destid, - u8 hopcount, u8 port_num) { -#ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS - u32 regval; - u32 ext_ftr_ptr; - - /* - * enable rx input tx output port - */ - pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " - "%d, port_num = %d)\n", local, destid, hopcount, port_num); - - ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); - - if (local) { - rio_local_read_config_32(port, ext_ftr_ptr + - RIO_PORT_N_CTL_CSR(0), - ®val); - } else { - if (rio_mport_read_config_32(port, destid, hopcount, - ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) - return -EIO; - } - - if (regval & RIO_PORT_N_CTL_P_TYP_SER) { - /* serial */ - regval = regval | RIO_PORT_N_CTL_EN_RX_SER - | RIO_PORT_N_CTL_EN_TX_SER; - } else { - /* parallel */ - regval = regval | RIO_PORT_N_CTL_EN_RX_PAR - | RIO_PORT_N_CTL_EN_TX_PAR; - } - - if (local) { - rio_local_write_config_32(port, ext_ftr_ptr + - RIO_PORT_N_CTL_CSR(0), regval); - } else { - if (rio_mport_write_config_32(port, destid, hopcount, - ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) - return -EIO; - } -#endif - return 0; -} - -/** * rio_setup_device- Allocates and sets up a RIO device * @net: RIO network * @port: Master port to send transactions @@ -587,8 +462,7 @@ static struct rio_dev *rio_setup_device(struct rio_net *net, rdev->destid); } - rdev->dev.bus = &rio_bus_type; - rdev->dev.parent = &rio_bus; + rio_attach_device(rdev); device_initialize(&rdev->dev); rdev->dev.release = rio_release_dev; @@ -1260,19 +1134,30 @@ static void rio_pw_enable(struct rio_mport *port, int enable) /** * rio_enum_mport- Start enumeration through a master port * @mport: Master port to send transactions + * @flags: Enumeration control flags * * Starts the enumeration process. If somebody has enumerated our * master port device, then give up. If not and we have an active * link, then start recursive peer enumeration. Returns %0 if * enumeration succeeds or %-EBUSY if enumeration fails. */ -int rio_enum_mport(struct rio_mport *mport) +int rio_enum_mport(struct rio_mport *mport, u32 flags) { struct rio_net *net = NULL; int rc = 0; printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id, mport->name); + + /* + * To avoid multiple start requests (repeat enumeration is not supported + * by this method) check if enumeration/discovery was performed for this + * mport: if mport was added into the list of mports for a net exit + * with error. + */ + if (mport->nnode.next || mport->nnode.prev) + return -EBUSY; + /* If somebody else enumerated our master port device, bail. */ if (rio_enum_host(mport) < 0) { printk(KERN_INFO @@ -1362,14 +1247,16 @@ static void rio_build_route_tables(struct rio_net *net) /** * rio_disc_mport- Start discovery through a master port * @mport: Master port to send transactions + * @flags: discovery control flags * * Starts the discovery process. If we have an active link, - * then wait for the signal that enumeration is complete. + * then wait for the signal that enumeration is complete (if wait + * is allowed). * When enumeration completion is signaled, start recursive * peer discovery. Returns %0 if discovery succeeds or %-EBUSY * on failure. */ -int rio_disc_mport(struct rio_mport *mport) +int rio_disc_mport(struct rio_mport *mport, u32 flags) { struct rio_net *net = NULL; unsigned long to_end; @@ -1379,6 +1266,11 @@ int rio_disc_mport(struct rio_mport *mport) /* If master port has an active link, allocate net and discover peers */ if (rio_mport_is_active(mport)) { + if (rio_enum_complete(mport)) + goto enum_done; + else if (flags & RIO_SCAN_ENUM_NO_WAIT) + return -EAGAIN; + pr_debug("RIO: wait for enumeration to complete...\n"); to_end = jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ; @@ -1421,3 +1313,41 @@ enum_done: bail: return -EBUSY; } + +static struct rio_scan rio_scan_ops = { + .enumerate = rio_enum_mport, + .discover = rio_disc_mport, +}; + +static bool scan; +module_param(scan, bool, 0); +MODULE_PARM_DESC(scan, "Start RapidIO network enumeration/discovery " + "(default = 0)"); + +/** + * rio_basic_attach: + * + * When this enumeration/discovery method is loaded as a module this function + * registers its specific enumeration and discover routines for all available + * RapidIO mport devices. The "scan" command line parameter controls ability of + * the module to start RapidIO enumeration/discovery automatically. + * + * Returns 0 for success or -EIO if unable to register itself. + * + * This enumeration/discovery method cannot be unloaded and therefore does not + * provide a matching cleanup_module routine. + */ + +static int __init rio_basic_attach(void) +{ + if (rio_register_scan(RIO_MPORT_ANY, &rio_scan_ops)) + return -EIO; + if (scan) + rio_init_mports(); + return 0; +} + +late_initcall(rio_basic_attach); + +MODULE_DESCRIPTION("Basic RapidIO enumeration/discovery"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c index 4dbe360989be..66d4acd5e18f 100644 --- a/drivers/rapidio/rio-sysfs.c +++ b/drivers/rapidio/rio-sysfs.c @@ -285,3 +285,48 @@ void rio_remove_sysfs_dev_files(struct rio_dev *rdev) rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE); } } + +static ssize_t bus_scan_store(struct bus_type *bus, const char *buf, + size_t count) +{ + long val; + struct rio_mport *port = NULL; + int rc; + + if (kstrtol(buf, 0, &val) < 0) + return -EINVAL; + + if (val == RIO_MPORT_ANY) { + rc = rio_init_mports(); + goto exit; + } + + if (val < 0 || val >= RIO_MAX_MPORTS) + return -EINVAL; + + port = rio_find_mport((int)val); + + if (!port) { + pr_debug("RIO: %s: mport_%d not available\n", + __func__, (int)val); + return -EINVAL; + } + + if (!port->nscan) + return -EINVAL; + + if (port->host_deviceid >= 0) + rc = port->nscan->enumerate(port, 0); + else + rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT); +exit: + if (!rc) + rc = count; + + return rc; +} + +struct bus_attribute rio_bus_attrs[] = { + __ATTR(scan, (S_IWUSR|S_IWGRP), NULL, bus_scan_store), + __ATTR_NULL +}; diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c index d553b5d13722..cb1c08996fbb 100644 --- a/drivers/rapidio/rio.c +++ b/drivers/rapidio/rio.c @@ -31,7 +31,11 @@ #include "rio.h" +static LIST_HEAD(rio_devices); +static DEFINE_SPINLOCK(rio_global_list_lock); + static LIST_HEAD(rio_mports); +static DEFINE_MUTEX(rio_mport_list_lock); static unsigned char next_portid; static DEFINE_SPINLOCK(rio_mmap_lock); @@ -53,6 +57,32 @@ u16 rio_local_get_device_id(struct rio_mport *port) } /** + * rio_add_device- Adds a RIO device to the device model + * @rdev: RIO device + * + * Adds the RIO device to the global device list and adds the RIO + * device to the RIO device list. Creates the generic sysfs nodes + * for an RIO device. + */ +int rio_add_device(struct rio_dev *rdev) +{ + int err; + + err = device_add(&rdev->dev); + if (err) + return err; + + spin_lock(&rio_global_list_lock); + list_add_tail(&rdev->global_list, &rio_devices); + spin_unlock(&rio_global_list_lock); + + rio_create_sysfs_dev_files(rdev); + + return 0; +} +EXPORT_SYMBOL_GPL(rio_add_device); + +/** * rio_request_inb_mbox - request inbound mailbox service * @mport: RIO master port from which to allocate the mailbox resource * @dev_id: Device specific pointer to pass on event @@ -489,6 +519,7 @@ rio_mport_get_physefb(struct rio_mport *port, int local, return ext_ftr_ptr; } +EXPORT_SYMBOL_GPL(rio_mport_get_physefb); /** * rio_get_comptag - Begin or continue searching for a RIO device by component tag @@ -521,6 +552,7 @@ exit: spin_unlock(&rio_global_list_lock); return rdev; } +EXPORT_SYMBOL_GPL(rio_get_comptag); /** * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. @@ -545,6 +577,107 @@ int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) regval); return 0; } +EXPORT_SYMBOL_GPL(rio_set_port_lockout); + +/** + * rio_switch_init - Sets switch operations for a particular vendor switch + * @rdev: RIO device + * @do_enum: Enumeration/Discovery mode flag + * + * Searches the RIO switch ops table for known switch types. If the vid + * and did match a switch table entry, then call switch initialization + * routine to setup switch-specific routines. + */ +void rio_switch_init(struct rio_dev *rdev, int do_enum) +{ + struct rio_switch_ops *cur = __start_rio_switch_ops; + struct rio_switch_ops *end = __end_rio_switch_ops; + + while (cur < end) { + if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) { + pr_debug("RIO: calling init routine for %s\n", + rio_name(rdev)); + cur->init_hook(rdev, do_enum); + break; + } + cur++; + } + + if ((cur >= end) && (rdev->pef & RIO_PEF_STD_RT)) { + pr_debug("RIO: adding STD routing ops for %s\n", + rio_name(rdev)); + rdev->rswitch->add_entry = rio_std_route_add_entry; + rdev->rswitch->get_entry = rio_std_route_get_entry; + rdev->rswitch->clr_table = rio_std_route_clr_table; + } + + if (!rdev->rswitch->add_entry || !rdev->rswitch->get_entry) + printk(KERN_ERR "RIO: missing routing ops for %s\n", + rio_name(rdev)); +} +EXPORT_SYMBOL_GPL(rio_switch_init); + +/** + * rio_enable_rx_tx_port - enable input receiver and output transmitter of + * given port + * @port: Master port associated with the RIO network + * @local: local=1 select local port otherwise a far device is reached + * @destid: Destination ID of the device to check host bit + * @hopcount: Number of hops to reach the target + * @port_num: Port (-number on switch) to enable on a far end device + * + * Returns 0 or 1 from on General Control Command and Status Register + * (EXT_PTR+0x3C) + */ +int rio_enable_rx_tx_port(struct rio_mport *port, + int local, u16 destid, + u8 hopcount, u8 port_num) +{ +#ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS + u32 regval; + u32 ext_ftr_ptr; + + /* + * enable rx input tx output port + */ + pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " + "%d, port_num = %d)\n", local, destid, hopcount, port_num); + + ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); + + if (local) { + rio_local_read_config_32(port, ext_ftr_ptr + + RIO_PORT_N_CTL_CSR(0), + ®val); + } else { + if (rio_mport_read_config_32(port, destid, hopcount, + ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) + return -EIO; + } + + if (regval & RIO_PORT_N_CTL_P_TYP_SER) { + /* serial */ + regval = regval | RIO_PORT_N_CTL_EN_RX_SER + | RIO_PORT_N_CTL_EN_TX_SER; + } else { + /* parallel */ + regval = regval | RIO_PORT_N_CTL_EN_RX_PAR + | RIO_PORT_N_CTL_EN_TX_PAR; + } + + if (local) { + rio_local_write_config_32(port, ext_ftr_ptr + + RIO_PORT_N_CTL_CSR(0), regval); + } else { + if (rio_mport_write_config_32(port, destid, hopcount, + ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) + return -EIO; + } +#endif + return 0; +} +EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port); + /** * rio_chk_dev_route - Validate route to the specified device. @@ -610,6 +743,7 @@ rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) return 0; } +EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access); /** * rio_chk_dev_access - Validate access to the specified device. @@ -941,6 +1075,7 @@ rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, return RIO_GET_BLOCK_ID(reg_val); } } +EXPORT_SYMBOL_GPL(rio_mport_get_efb); /** * rio_mport_get_feature - query for devices' extended features @@ -997,6 +1132,7 @@ rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, return 0; } +EXPORT_SYMBOL_GPL(rio_mport_get_feature); /** * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did @@ -1246,6 +1382,95 @@ EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg); #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ +/** + * rio_find_mport - find RIO mport by its ID + * @mport_id: number (ID) of mport device + * + * Given a RIO mport number, the desired mport is located + * in the global list of mports. If the mport is found, a pointer to its + * data structure is returned. If no mport is found, %NULL is returned. + */ +struct rio_mport *rio_find_mport(int mport_id) +{ + struct rio_mport *port; + + mutex_lock(&rio_mport_list_lock); + list_for_each_entry(port, &rio_mports, node) { + if (port->id == mport_id) + goto found; + } + port = NULL; +found: + mutex_unlock(&rio_mport_list_lock); + + return port; +} + +/** + * rio_register_scan - enumeration/discovery method registration interface + * @mport_id: mport device ID for which fabric scan routine has to be set + * (RIO_MPORT_ANY = set for all available mports) + * @scan_ops: enumeration/discovery control structure + * + * Assigns enumeration or discovery method to the specified mport device (or all + * available mports if RIO_MPORT_ANY is specified). + * Returns error if the mport already has an enumerator attached to it. + * In case of RIO_MPORT_ANY ignores ports with valid scan routines and returns + * an error if was unable to find at least one available mport. + */ +int rio_register_scan(int mport_id, struct rio_scan *scan_ops) +{ + struct rio_mport *port; + int rc = -EBUSY; + + mutex_lock(&rio_mport_list_lock); + list_for_each_entry(port, &rio_mports, node) { + if (port->id == mport_id || mport_id == RIO_MPORT_ANY) { + if (port->nscan && mport_id == RIO_MPORT_ANY) + continue; + else if (port->nscan) + break; + + port->nscan = scan_ops; + rc = 0; + + if (mport_id != RIO_MPORT_ANY) + break; + } + } + mutex_unlock(&rio_mport_list_lock); + + return rc; +} +EXPORT_SYMBOL_GPL(rio_register_scan); + +/** + * rio_unregister_scan - removes enumeration/discovery method from mport + * @mport_id: mport device ID for which fabric scan routine has to be + * unregistered (RIO_MPORT_ANY = set for all available mports) + * + * Removes enumeration or discovery method assigned to the specified mport + * device (or all available mports if RIO_MPORT_ANY is specified). + */ +int rio_unregister_scan(int mport_id) +{ + struct rio_mport *port; + + mutex_lock(&rio_mport_list_lock); + list_for_each_entry(port, &rio_mports, node) { + if (port->id == mport_id || mport_id == RIO_MPORT_ANY) { + if (port->nscan) + port->nscan = NULL; + if (mport_id != RIO_MPORT_ANY) + break; + } + } + mutex_unlock(&rio_mport_list_lock); + + return 0; +} +EXPORT_SYMBOL_GPL(rio_unregister_scan); + static void rio_fixup_device(struct rio_dev *dev) { } @@ -1274,7 +1499,7 @@ static void disc_work_handler(struct work_struct *_work) work = container_of(_work, struct rio_disc_work, work); pr_debug("RIO: discovery work for mport %d %s\n", work->mport->id, work->mport->name); - rio_disc_mport(work->mport); + work->mport->nscan->discover(work->mport, 0); } int rio_init_mports(void) @@ -1290,12 +1515,15 @@ int rio_init_mports(void) * First, run enumerations and check if we need to perform discovery * on any of the registered mports. */ + mutex_lock(&rio_mport_list_lock); list_for_each_entry(port, &rio_mports, node) { - if (port->host_deviceid >= 0) - rio_enum_mport(port); - else + if (port->host_deviceid >= 0) { + if (port->nscan) + port->nscan->enumerate(port, 0); + } else n++; } + mutex_unlock(&rio_mport_list_lock); if (!n) goto no_disc; @@ -1322,14 +1550,16 @@ int rio_init_mports(void) } n = 0; + mutex_lock(&rio_mport_list_lock); list_for_each_entry(port, &rio_mports, node) { - if (port->host_deviceid < 0) { + if (port->host_deviceid < 0 && port->nscan) { work[n].mport = port; INIT_WORK(&work[n].work, disc_work_handler); queue_work(rio_wq, &work[n].work); n++; } } + mutex_unlock(&rio_mport_list_lock); flush_workqueue(rio_wq); pr_debug("RIO: destroy discovery workqueue\n"); @@ -1342,8 +1572,6 @@ no_disc: return 0; } -device_initcall_sync(rio_init_mports); - static int hdids[RIO_MAX_MPORTS + 1]; static int rio_get_hdid(int index) @@ -1371,7 +1599,10 @@ int rio_register_mport(struct rio_mport *port) port->id = next_portid++; port->host_deviceid = rio_get_hdid(port->id); + port->nscan = NULL; + mutex_lock(&rio_mport_list_lock); list_add_tail(&port->node, &rio_mports); + mutex_unlock(&rio_mport_list_lock); return 0; } @@ -1386,3 +1617,4 @@ EXPORT_SYMBOL_GPL(rio_request_inb_mbox); EXPORT_SYMBOL_GPL(rio_release_inb_mbox); EXPORT_SYMBOL_GPL(rio_request_outb_mbox); EXPORT_SYMBOL_GPL(rio_release_outb_mbox); +EXPORT_SYMBOL_GPL(rio_init_mports); diff --git a/drivers/rapidio/rio.h b/drivers/rapidio/rio.h index b1af414f15e6..c14f864dea5c 100644 --- a/drivers/rapidio/rio.h +++ b/drivers/rapidio/rio.h @@ -15,6 +15,7 @@ #include <linux/rio.h> #define RIO_MAX_CHK_RETRY 3 +#define RIO_MPORT_ANY (-1) /* Functions internal to the RIO core code */ @@ -27,8 +28,6 @@ extern u32 rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, extern int rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount); extern int rio_create_sysfs_dev_files(struct rio_dev *rdev); -extern int rio_enum_mport(struct rio_mport *mport); -extern int rio_disc_mport(struct rio_mport *mport); extern int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 route_port); @@ -39,10 +38,18 @@ extern int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table); extern int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock); extern struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from); +extern int rio_add_device(struct rio_dev *rdev); +extern void rio_switch_init(struct rio_dev *rdev, int do_enum); +extern int rio_enable_rx_tx_port(struct rio_mport *port, int local, u16 destid, + u8 hopcount, u8 port_num); +extern int rio_register_scan(int mport_id, struct rio_scan *scan_ops); +extern int rio_unregister_scan(int mport_id); +extern void rio_attach_device(struct rio_dev *rdev); +extern struct rio_mport *rio_find_mport(int mport_id); /* Structures internal to the RIO core code */ extern struct device_attribute rio_dev_attrs[]; -extern spinlock_t rio_global_list_lock; +extern struct bus_attribute rio_bus_attrs[]; extern struct rio_switch_ops __start_rio_switch_ops[]; extern struct rio_switch_ops __end_rio_switch_ops[]; diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c index 48b6612fae7f..d5af7baa48b5 100644 --- a/drivers/rtc/rtc-max8998.c +++ b/drivers/rtc/rtc-max8998.c @@ -285,7 +285,7 @@ static int max8998_rtc_probe(struct platform_device *pdev) info->irq, ret); dev_info(&pdev->dev, "RTC CHIP NAME: %s\n", pdev->id_entry->name); - if (pdata->rtc_delay) { + if (pdata && pdata->rtc_delay) { info->lp3974_bug_workaround = true; dev_warn(&pdev->dev, "LP3974 with RTC REGERR option." " RTC updates will be extremely slow.\n"); diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c index 8900ea784817..0f0609b1aa2c 100644 --- a/drivers/rtc/rtc-pl031.c +++ b/drivers/rtc/rtc-pl031.c @@ -306,7 +306,7 @@ static int pl031_remove(struct amba_device *adev) struct pl031_local *ldata = dev_get_drvdata(&adev->dev); amba_set_drvdata(adev, NULL); - free_irq(adev->irq[0], ldata->rtc); + free_irq(adev->irq[0], ldata); rtc_device_unregister(ldata->rtc); iounmap(ldata->base); kfree(ldata); diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index d71d60f94fc1..2e937bdace6f 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -2199,7 +2199,7 @@ config FB_XILINX config FB_GOLDFISH tristate "Goldfish Framebuffer" - depends on FB + depends on FB && HAS_DMA select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -2453,6 +2453,23 @@ config FB_HYPERV help This framebuffer driver supports Microsoft Hyper-V Synthetic Video. +config FB_SIMPLE + bool "Simple framebuffer support" + depends on (FB = y) && OF + select FB_CFB_FILLRECT + select FB_CFB_COPYAREA + select FB_CFB_IMAGEBLIT + help + Say Y if you want support for a simple frame-buffer. + + This driver assumes that the display hardware has been initialized + before the kernel boots, and the kernel will simply render to the + pre-allocated frame buffer surface. + + Configuration re: surface address, size, and format must be provided + through device tree, or potentially plain old platform data in the + future. + source "drivers/video/omap/Kconfig" source "drivers/video/omap2/Kconfig" source "drivers/video/exynos/Kconfig" diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 7234e4a959e8..e8bae8dd4804 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -166,6 +166,7 @@ obj-$(CONFIG_FB_MX3) += mx3fb.o obj-$(CONFIG_FB_DA8XX) += da8xx-fb.o obj-$(CONFIG_FB_MXS) += mxsfb.o obj-$(CONFIG_FB_SSD1307) += ssd1307fb.o +obj-$(CONFIG_FB_SIMPLE) += simplefb.o # the test framebuffer is last obj-$(CONFIG_FB_VIRTUAL) += vfb.o diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c new file mode 100644 index 000000000000..e2e9e3e61b72 --- /dev/null +++ b/drivers/video/simplefb.c @@ -0,0 +1,234 @@ +/* + * Simplest possible simple frame-buffer driver, as a platform device + * + * Copyright (c) 2013, Stephen Warren + * + * Based on q40fb.c, which was: + * Copyright (C) 2001 Richard Zidlicky <rz@linux-m68k.org> + * + * Also based on offb.c, which was: + * Copyright (C) 1997 Geert Uytterhoeven + * Copyright (C) 1996 Paul Mackerras + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/errno.h> +#include <linux/fb.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +static struct fb_fix_screeninfo simplefb_fix = { + .id = "simple", + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_TRUECOLOR, + .accel = FB_ACCEL_NONE, +}; + +static struct fb_var_screeninfo simplefb_var = { + .height = -1, + .width = -1, + .activate = FB_ACTIVATE_NOW, + .vmode = FB_VMODE_NONINTERLACED, +}; + +static int simplefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *info) +{ + u32 *pal = info->pseudo_palette; + u32 cr = red >> (16 - info->var.red.length); + u32 cg = green >> (16 - info->var.green.length); + u32 cb = blue >> (16 - info->var.blue.length); + u32 value; + + if (regno >= 16) + return -EINVAL; + + value = (cr << info->var.red.offset) | + (cg << info->var.green.offset) | + (cb << info->var.blue.offset); + if (info->var.transp.length > 0) { + u32 mask = (1 << info->var.transp.length) - 1; + mask <<= info->var.transp.offset; + value |= mask; + } + pal[regno] = value; + + return 0; +} + +static struct fb_ops simplefb_ops = { + .owner = THIS_MODULE, + .fb_setcolreg = simplefb_setcolreg, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, +}; + +struct simplefb_format { + const char *name; + u32 bits_per_pixel; + struct fb_bitfield red; + struct fb_bitfield green; + struct fb_bitfield blue; + struct fb_bitfield transp; +}; + +static struct simplefb_format simplefb_formats[] = { + { "r5g6b5", 16, {11, 5}, {5, 6}, {0, 5}, {0, 0} }, +}; + +struct simplefb_params { + u32 width; + u32 height; + u32 stride; + struct simplefb_format *format; +}; + +static int simplefb_parse_dt(struct platform_device *pdev, + struct simplefb_params *params) +{ + struct device_node *np = pdev->dev.of_node; + int ret; + const char *format; + int i; + + ret = of_property_read_u32(np, "width", ¶ms->width); + if (ret) { + dev_err(&pdev->dev, "Can't parse width property\n"); + return ret; + } + + ret = of_property_read_u32(np, "height", ¶ms->height); + if (ret) { + dev_err(&pdev->dev, "Can't parse height property\n"); + return ret; + } + + ret = of_property_read_u32(np, "stride", ¶ms->stride); + if (ret) { + dev_err(&pdev->dev, "Can't parse stride property\n"); + return ret; + } + + ret = of_property_read_string(np, "format", &format); + if (ret) { + dev_err(&pdev->dev, "Can't parse format property\n"); + return ret; + } + params->format = NULL; + for (i = 0; i < ARRAY_SIZE(simplefb_formats); i++) { + if (strcmp(format, simplefb_formats[i].name)) + continue; + params->format = &simplefb_formats[i]; + break; + } + if (!params->format) { + dev_err(&pdev->dev, "Invalid format value\n"); + return -EINVAL; + } + + return 0; +} + +static int simplefb_probe(struct platform_device *pdev) +{ + int ret; + struct simplefb_params params; + struct fb_info *info; + struct resource *mem; + + if (fb_get_options("simplefb", NULL)) + return -ENODEV; + + ret = simplefb_parse_dt(pdev, ¶ms); + if (ret) + return ret; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + dev_err(&pdev->dev, "No memory resource\n"); + return -EINVAL; + } + + info = framebuffer_alloc(sizeof(u32) * 16, &pdev->dev); + if (!info) + return -ENOMEM; + platform_set_drvdata(pdev, info); + + info->fix = simplefb_fix; + info->fix.smem_start = mem->start; + info->fix.smem_len = resource_size(mem); + info->fix.line_length = params.stride; + + info->var = simplefb_var; + info->var.xres = params.width; + info->var.yres = params.height; + info->var.xres_virtual = params.width; + info->var.yres_virtual = params.height; + info->var.bits_per_pixel = params.format->bits_per_pixel; + info->var.red = params.format->red; + info->var.green = params.format->green; + info->var.blue = params.format->blue; + info->var.transp = params.format->transp; + + info->fbops = &simplefb_ops; + info->flags = FBINFO_DEFAULT; + info->screen_base = devm_ioremap(&pdev->dev, info->fix.smem_start, + info->fix.smem_len); + if (!info->screen_base) { + framebuffer_release(info); + return -ENODEV; + } + info->pseudo_palette = (void *)(info + 1); + + ret = register_framebuffer(info); + if (ret < 0) { + dev_err(&pdev->dev, "Unable to register simplefb: %d\n", ret); + framebuffer_release(info); + return ret; + } + + dev_info(&pdev->dev, "fb%d: simplefb registered!\n", info->node); + + return 0; +} + +static int simplefb_remove(struct platform_device *pdev) +{ + struct fb_info *info = platform_get_drvdata(pdev); + + unregister_framebuffer(info); + framebuffer_release(info); + + return 0; +} + +static const struct of_device_id simplefb_of_match[] = { + { .compatible = "simple-framebuffer", }, + { }, +}; +MODULE_DEVICE_TABLE(of, simplefb_of_match); + +static struct platform_driver simplefb_driver = { + .driver = { + .name = "simple-framebuffer", + .owner = THIS_MODULE, + .of_match_table = simplefb_of_match, + }, + .probe = simplefb_probe, + .remove = simplefb_remove, +}; +module_platform_driver(simplefb_driver); + +MODULE_AUTHOR("Stephen Warren <swarren@wwwdotorg.org>"); +MODULE_DESCRIPTION("Simple framebuffer driver"); +MODULE_LICENSE("GPL v2"); @@ -307,7 +307,9 @@ static void free_ioctx(struct kioctx *ctx) kunmap_atomic(ring); while (atomic_read(&ctx->reqs_active) > 0) { - wait_event(ctx->wait, head != ctx->tail); + wait_event(ctx->wait, + head != ctx->tail || + atomic_read(&ctx->reqs_active) <= 0); avail = (head <= ctx->tail ? ctx->tail : ctx->nr_events) - head; @@ -1299,8 +1301,7 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, * < min_nr if the timeout specified by timeout has elapsed * before sufficient events are available, where timeout == NULL * specifies an infinite timeout. Note that the timeout pointed to by - * timeout is relative and will be updated if not NULL and the - * operation blocks. Will fail with -ENOSYS if not implemented. + * timeout is relative. Will fail with -ENOSYS if not implemented. */ SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id, long, min_nr, diff --git a/fs/fat/inode.c b/fs/fat/inode.c index dfce656ddb33..5d4513cb1b3c 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -1229,6 +1229,19 @@ static int fat_read_root(struct inode *inode) return 0; } +static unsigned long calc_fat_clusters(struct super_block *sb) +{ + struct msdos_sb_info *sbi = MSDOS_SB(sb); + + /* Divide first to avoid overflow */ + if (sbi->fat_bits != 12) { + unsigned long ent_per_sec = sb->s_blocksize * 8 / sbi->fat_bits; + return ent_per_sec * sbi->fat_length; + } + + return sbi->fat_length * sb->s_blocksize * 8 / sbi->fat_bits; +} + /* * Read the super block of an MS-DOS FS. */ @@ -1434,7 +1447,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat, sbi->dirty = b->fat16.state & FAT_STATE_DIRTY; /* check that FAT table does not overflow */ - fat_clusters = sbi->fat_length * sb->s_blocksize * 8 / sbi->fat_bits; + fat_clusters = calc_fat_clusters(sb); total_clusters = min(total_clusters, fat_clusters - FAT_START_ENT); if (total_clusters > MAX_FAT(sb)) { if (!silent) diff --git a/fs/hfs/bnode.c b/fs/hfs/bnode.c index f3b1a15ccd59..d3fa6bd9503e 100644 --- a/fs/hfs/bnode.c +++ b/fs/hfs/bnode.c @@ -415,7 +415,11 @@ struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num) spin_lock(&tree->hash_lock); node = hfs_bnode_findhash(tree, num); spin_unlock(&tree->hash_lock); - BUG_ON(node); + if (node) { + pr_crit("new node %u already hashed?\n", num); + WARN_ON(1); + return node; + } node = __hfs_bnode_create(tree, num); if (!node) return ERR_PTR(-ENOMEM); diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 689fb608648e..bccfec8343c5 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -219,13 +219,32 @@ static int nilfs_writepage(struct page *page, struct writeback_control *wbc) static int nilfs_set_page_dirty(struct page *page) { - int ret = __set_page_dirty_buffers(page); + int ret = __set_page_dirty_nobuffers(page); - if (ret) { + if (page_has_buffers(page)) { struct inode *inode = page->mapping->host; - unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); + unsigned nr_dirty = 0; + struct buffer_head *bh, *head; - nilfs_set_file_dirty(inode, nr_dirty); + /* + * This page is locked by callers, and no other thread + * concurrently marks its buffers dirty since they are + * only dirtied through routines in fs/buffer.c in + * which call sites of mark_buffer_dirty are protected + * by page lock. + */ + bh = head = page_buffers(page); + do { + /* Do not mark hole blocks dirty */ + if (buffer_dirty(bh) || !buffer_mapped(bh)) + continue; + + set_buffer_dirty(bh); + nr_dirty++; + } while (bh = bh->b_this_page, bh != head); + + if (nr_dirty) + nilfs_set_file_dirty(inode, nr_dirty); } return ret; } diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c index 1c39efb71bab..2487116d0d33 100644 --- a/fs/ocfs2/extent_map.c +++ b/fs/ocfs2/extent_map.c @@ -790,7 +790,7 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, &hole_size, &rec, &is_last); if (ret) { mlog_errno(ret); - goto out; + goto out_unlock; } if (rec.e_blkno == 0ULL) { diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 8a7509f9e6f5..ff54014a24ec 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -2288,7 +2288,7 @@ relock: ret = ocfs2_inode_lock(inode, NULL, 1); if (ret < 0) { mlog_errno(ret); - goto out_sems; + goto out; } ocfs2_inode_unlock(inode, 1); diff --git a/include/linux/kernel.h b/include/linux/kernel.h index e96329ceb28c..e9ef6d6b51d5 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -562,6 +562,9 @@ int __trace_bprintk(unsigned long ip, const char *fmt, ...); extern __printf(2, 3) int __trace_printk(unsigned long ip, const char *fmt, ...); +extern int __trace_bputs(unsigned long ip, const char *str); +extern int __trace_puts(unsigned long ip, const char *str, int size); + /** * trace_puts - write a string into the ftrace buffer * @str: the string to record @@ -587,8 +590,6 @@ int __trace_printk(unsigned long ip, const char *fmt, ...); * (1 when __trace_bputs is used, strlen(str) when __trace_puts is used) */ -extern int __trace_bputs(unsigned long ip, const char *str); -extern int __trace_puts(unsigned long ip, const char *str, int size); #define trace_puts(str) ({ \ static const char *trace_printk_fmt \ __attribute__((section("__trace_printk_fmt"))) = \ diff --git a/include/linux/rio.h b/include/linux/rio.h index a3e784278667..18e099342e6f 100644 --- a/include/linux/rio.h +++ b/include/linux/rio.h @@ -83,7 +83,6 @@ extern struct bus_type rio_bus_type; extern struct device rio_bus; -extern struct list_head rio_devices; /* list of all devices */ struct rio_mport; struct rio_dev; @@ -237,6 +236,7 @@ enum rio_phy_type { * @name: Port name string * @priv: Master port private data * @dma: DMA device associated with mport + * @nscan: RapidIO network enumeration/discovery operations */ struct rio_mport { struct list_head dbells; /* list of doorbell events */ @@ -262,8 +262,14 @@ struct rio_mport { #ifdef CONFIG_RAPIDIO_DMA_ENGINE struct dma_device dma; #endif + struct rio_scan *nscan; }; +/* + * Enumeration/discovery control flags + */ +#define RIO_SCAN_ENUM_NO_WAIT 0x00000001 /* Do not wait for enum completed */ + struct rio_id_table { u16 start; /* logical minimal id */ u32 max; /* max number of IDs in table */ @@ -460,6 +466,16 @@ static inline struct rio_mport *dma_to_mport(struct dma_device *ddev) } #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ +/** + * struct rio_scan - RIO enumeration and discovery operations + * @enumerate: Callback to perform RapidIO fabric enumeration. + * @discover: Callback to perform RapidIO fabric discovery. + */ +struct rio_scan { + int (*enumerate)(struct rio_mport *mport, u32 flags); + int (*discover)(struct rio_mport *mport, u32 flags); +}; + /* Architecture and hardware-specific functions */ extern int rio_register_mport(struct rio_mport *); extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int); diff --git a/include/linux/rio_drv.h b/include/linux/rio_drv.h index b75c05920ab5..5059994fe297 100644 --- a/include/linux/rio_drv.h +++ b/include/linux/rio_drv.h @@ -433,5 +433,6 @@ extern u16 rio_local_get_device_id(struct rio_mport *port); extern struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from); extern struct rio_dev *rio_get_asm(u16 vid, u16 did, u16 asm_vid, u16 asm_did, struct rio_dev *from); +extern int rio_init_mports(void); #endif /* LINUX_RIO_DRV_H */ diff --git a/include/linux/wait.h b/include/linux/wait.h index ac38be2692d8..1133695eb067 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -217,6 +217,8 @@ do { \ if (!ret) \ break; \ } \ + if (!ret && (condition)) \ + ret = 1; \ finish_wait(&wq, &__wait); \ } while (0) @@ -233,8 +235,9 @@ do { \ * wake_up() has to be called after changing any variable that could * change the result of the wait condition. * - * The function returns 0 if the @timeout elapsed, and the remaining - * jiffies if the condition evaluated to true before the timeout elapsed. + * The function returns 0 if the @timeout elapsed, or the remaining + * jiffies (at least 1) if the @condition evaluated to %true before + * the @timeout elapsed. */ #define wait_event_timeout(wq, condition, timeout) \ ({ \ @@ -302,6 +305,8 @@ do { \ ret = -ERESTARTSYS; \ break; \ } \ + if (!ret && (condition)) \ + ret = 1; \ finish_wait(&wq, &__wait); \ } while (0) @@ -318,9 +323,10 @@ do { \ * wake_up() has to be called after changing any variable that could * change the result of the wait condition. * - * The function returns 0 if the @timeout elapsed, -ERESTARTSYS if it - * was interrupted by a signal, and the remaining jiffies otherwise - * if the condition evaluated to true before the timeout elapsed. + * Returns: + * 0 if the @timeout elapsed, -%ERESTARTSYS if it was interrupted by + * a signal, or the remaining jiffies (at least 1) if the @condition + * evaluated to %true before the @timeout elapsed. */ #define wait_event_interruptible_timeout(wq, condition, timeout) \ ({ \ diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c index 83a2970295d1..6bd4a90d1991 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -1021,9 +1021,6 @@ static void audit_log_rule_change(char *action, struct audit_krule *rule, int re * @seq: netlink audit message sequence (serial) number * @data: payload data * @datasz: size of payload data - * @loginuid: loginuid of sender - * @sessionid: sessionid for netlink audit message - * @sid: SE Linux Security ID of sender */ int audit_receive_filter(int type, int pid, int seq, void *data, size_t datasz) { diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 03a89a2f464b..362c329b83fe 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2325,7 +2325,12 @@ static void collapse_huge_page(struct mm_struct *mm, pte_unmap(pte); spin_lock(&mm->page_table_lock); BUG_ON(!pmd_none(*pmd)); - set_pmd_at(mm, address, pmd, _pmd); + /* + * We can only use set_pmd_at when establishing + * hugepmds and never for establishing regular pmds that + * points to regular pagetables. Use pmd_populate for that + */ + pmd_populate(mm, pmd, pmd_pgtable(_pmd)); spin_unlock(&mm->page_table_lock); anon_vma_unlock_write(vma->anon_vma); goto out; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index cb1c9dedf9b6..010d6c14129a 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4108,8 +4108,6 @@ __mem_cgroup_uncharge_common(struct page *page, enum charge_type ctype, if (mem_cgroup_disabled()) return NULL; - VM_BUG_ON(PageSwapCache(page)); - if (PageTransHuge(page)) { nr_pages <<= compound_order(page); VM_BUG_ON(!PageTransHuge(page)); @@ -4205,6 +4203,18 @@ void mem_cgroup_uncharge_page(struct page *page) if (page_mapped(page)) return; VM_BUG_ON(page->mapping && !PageAnon(page)); + /* + * If the page is in swap cache, uncharge should be deferred + * to the swap path, which also properly accounts swap usage + * and handles memcg lifetime. + * + * Note that this check is not stable and reclaim may add the + * page to swap cache at any time after this. However, if the + * page is not in swap cache by the time page->mapcount hits + * 0, there won't be any page table references to the swap + * slot, and reclaim will free it and not actually write the + * page to disk. + */ if (PageSwapCache(page)) return; __mem_cgroup_uncharge_common(page, MEM_CGROUP_CHARGE_TYPE_ANON, false); diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index a221fac1f47d..1ad92b46753e 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -720,9 +720,12 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn, start = phys_start_pfn << PAGE_SHIFT; size = nr_pages * PAGE_SIZE; ret = release_mem_region_adjustable(&iomem_resource, start, size); - if (ret) - pr_warn("Unable to release resource <%016llx-%016llx> (%d)\n", - start, start + size - 1, ret); + if (ret) { + resource_size_t endres = start + size - 1; + + pr_warn("Unable to release resource <%pa-%pa> (%d)\n", + &start, &endres, ret); + } sections_to_remove = nr_pages / PAGES_PER_SECTION; for (i = 0; i < sections_to_remove; i++) { diff --git a/mm/migrate.c b/mm/migrate.c index 27ed22579fd9..b1f57501de9c 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -165,7 +165,7 @@ static int remove_migration_pte(struct page *new, struct vm_area_struct *vma, pte = arch_make_huge_pte(pte, vma, new, 0); } #endif - flush_cache_page(vma, addr, pte_pfn(pte)); + flush_dcache_page(new); set_pte_at(mm, addr, ptep, pte); if (PageHuge(new)) { diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c index be04122fb277..6725ff183374 100644 --- a/mm/mmu_notifier.c +++ b/mm/mmu_notifier.c @@ -40,48 +40,44 @@ void __mmu_notifier_release(struct mm_struct *mm) int id; /* - * srcu_read_lock() here will block synchronize_srcu() in - * mmu_notifier_unregister() until all registered - * ->release() callouts this function makes have - * returned. + * SRCU here will block mmu_notifier_unregister until + * ->release returns. */ id = srcu_read_lock(&srcu); + hlist_for_each_entry_rcu(mn, &mm->mmu_notifier_mm->list, hlist) + /* + * If ->release runs before mmu_notifier_unregister it must be + * handled, as it's the only way for the driver to flush all + * existing sptes and stop the driver from establishing any more + * sptes before all the pages in the mm are freed. + */ + if (mn->ops->release) + mn->ops->release(mn, mm); + srcu_read_unlock(&srcu, id); + spin_lock(&mm->mmu_notifier_mm->lock); while (unlikely(!hlist_empty(&mm->mmu_notifier_mm->list))) { mn = hlist_entry(mm->mmu_notifier_mm->list.first, struct mmu_notifier, hlist); - /* - * Unlink. This will prevent mmu_notifier_unregister() - * from also making the ->release() callout. + * We arrived before mmu_notifier_unregister so + * mmu_notifier_unregister will do nothing other than to wait + * for ->release to finish and for mmu_notifier_unregister to + * return. */ hlist_del_init_rcu(&mn->hlist); - spin_unlock(&mm->mmu_notifier_mm->lock); - - /* - * Clear sptes. (see 'release' description in mmu_notifier.h) - */ - if (mn->ops->release) - mn->ops->release(mn, mm); - - spin_lock(&mm->mmu_notifier_mm->lock); } spin_unlock(&mm->mmu_notifier_mm->lock); /* - * All callouts to ->release() which we have done are complete. - * Allow synchronize_srcu() in mmu_notifier_unregister() to complete - */ - srcu_read_unlock(&srcu, id); - - /* - * mmu_notifier_unregister() may have unlinked a notifier and may - * still be calling out to it. Additionally, other notifiers - * may have been active via vmtruncate() et. al. Block here - * to ensure that all notifier callouts for this mm have been - * completed and the sptes are really cleaned up before returning - * to exit_mmap(). + * synchronize_srcu here prevents mmu_notifier_release from returning to + * exit_mmap (which would proceed with freeing all pages in the mm) + * until the ->release method returns, if it was invoked by + * mmu_notifier_unregister. + * + * The mmu_notifier_mm can't go away from under us because one mm_count + * is held by exit_mmap. */ synchronize_srcu(&srcu); } @@ -292,31 +288,34 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm) { BUG_ON(atomic_read(&mm->mm_count) <= 0); - spin_lock(&mm->mmu_notifier_mm->lock); if (!hlist_unhashed(&mn->hlist)) { + /* + * SRCU here will force exit_mmap to wait for ->release to + * finish before freeing the pages. + */ int id; + id = srcu_read_lock(&srcu); /* - * Ensure we synchronize up with __mmu_notifier_release(). + * exit_mmap will block in mmu_notifier_release to guarantee + * that ->release is called before freeing the pages. */ - id = srcu_read_lock(&srcu); - - hlist_del_rcu(&mn->hlist); - spin_unlock(&mm->mmu_notifier_mm->lock); - if (mn->ops->release) mn->ops->release(mn, mm); + srcu_read_unlock(&srcu, id); + spin_lock(&mm->mmu_notifier_mm->lock); /* - * Allow __mmu_notifier_release() to complete. + * Can not use list_del_rcu() since __mmu_notifier_release + * can delete it before we hold the lock. */ - srcu_read_unlock(&srcu, id); - } else + hlist_del_init_rcu(&mn->hlist); spin_unlock(&mm->mmu_notifier_mm->lock); + } /* - * Wait for any running method to finish, including ->release() if it - * was run by __mmu_notifier_release() instead of us. + * Wait for any running method to finish, of course including + * ->release if it was run by mmu_notifier_relase instead of us. */ synchronize_srcu(&srcu); diff --git a/mm/pagewalk.c b/mm/pagewalk.c index 35aa294656cd..5da2cbcfdbb5 100644 --- a/mm/pagewalk.c +++ b/mm/pagewalk.c @@ -127,28 +127,7 @@ static int walk_hugetlb_range(struct vm_area_struct *vma, return 0; } -static struct vm_area_struct* hugetlb_vma(unsigned long addr, struct mm_walk *walk) -{ - struct vm_area_struct *vma; - - /* We don't need vma lookup at all. */ - if (!walk->hugetlb_entry) - return NULL; - - VM_BUG_ON(!rwsem_is_locked(&walk->mm->mmap_sem)); - vma = find_vma(walk->mm, addr); - if (vma && vma->vm_start <= addr && is_vm_hugetlb_page(vma)) - return vma; - - return NULL; -} - #else /* CONFIG_HUGETLB_PAGE */ -static struct vm_area_struct* hugetlb_vma(unsigned long addr, struct mm_walk *walk) -{ - return NULL; -} - static int walk_hugetlb_range(struct vm_area_struct *vma, unsigned long addr, unsigned long end, struct mm_walk *walk) @@ -198,30 +177,53 @@ int walk_page_range(unsigned long addr, unsigned long end, if (!walk->mm) return -EINVAL; + VM_BUG_ON(!rwsem_is_locked(&walk->mm->mmap_sem)); + pgd = pgd_offset(walk->mm, addr); do { - struct vm_area_struct *vma; + struct vm_area_struct *vma = NULL; next = pgd_addr_end(addr, end); /* - * handle hugetlb vma individually because pagetable walk for - * the hugetlb page is dependent on the architecture and - * we can't handled it in the same manner as non-huge pages. + * This function was not intended to be vma based. + * But there are vma special cases to be handled: + * - hugetlb vma's + * - VM_PFNMAP vma's */ - vma = hugetlb_vma(addr, walk); + vma = find_vma(walk->mm, addr); if (vma) { - if (vma->vm_end < next) + /* + * There are no page structures backing a VM_PFNMAP + * range, so do not allow split_huge_page_pmd(). + */ + if ((vma->vm_start <= addr) && + (vma->vm_flags & VM_PFNMAP)) { next = vma->vm_end; + pgd = pgd_offset(walk->mm, next); + continue; + } /* - * Hugepage is very tightly coupled with vma, so - * walk through hugetlb entries within a given vma. + * Handle hugetlb vma individually because pagetable + * walk for the hugetlb page is dependent on the + * architecture and we can't handled it in the same + * manner as non-huge pages. */ - err = walk_hugetlb_range(vma, addr, next, walk); - if (err) - break; - pgd = pgd_offset(walk->mm, next); - continue; + if (walk->hugetlb_entry && (vma->vm_start <= addr) && + is_vm_hugetlb_page(vma)) { + if (vma->vm_end < next) + next = vma->vm_end; + /* + * Hugepage is very tightly coupled with vma, + * so walk through hugetlb entries within a + * given vma. + */ + err = walk_hugetlb_range(vma, addr, next, walk); + if (err) + break; + pgd = pgd_offset(walk->mm, next); + continue; + } } if (pgd_none_or_clear_bad(pgd)) { diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index d4abc59ce1d9..0a63658065f0 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -6,7 +6,6 @@ TARGETS += memory-hotplug TARGETS += mqueue TARGETS += net TARGETS += ptrace -TARGETS += soft-dirty TARGETS += vm all: diff --git a/tools/testing/selftests/soft-dirty/Makefile b/tools/testing/selftests/soft-dirty/Makefile deleted file mode 100644 index a9cdc823d6e0..000000000000 --- a/tools/testing/selftests/soft-dirty/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -CFLAGS += -iquote../../../../include/uapi -Wall -soft-dirty: soft-dirty.c - -all: soft-dirty - -clean: - rm -f soft-dirty - -run_tests: all - @./soft-dirty || echo "soft-dirty selftests: [FAIL]" diff --git a/tools/testing/selftests/soft-dirty/soft-dirty.c b/tools/testing/selftests/soft-dirty/soft-dirty.c deleted file mode 100644 index aba4f87f87f0..000000000000 --- a/tools/testing/selftests/soft-dirty/soft-dirty.c +++ /dev/null @@ -1,114 +0,0 @@ -#include <stdlib.h> -#include <stdio.h> -#include <sys/mman.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/types.h> - -typedef unsigned long long u64; - -#define PME_PRESENT (1ULL << 63) -#define PME_SOFT_DIRTY (1Ull << 55) - -#define PAGES_TO_TEST 3 -#ifndef PAGE_SIZE -#define PAGE_SIZE 4096 -#endif - -static void get_pagemap2(char *mem, u64 *map) -{ - int fd; - - fd = open("/proc/self/pagemap2", O_RDONLY); - if (fd < 0) { - perror("Can't open pagemap2"); - exit(1); - } - - lseek(fd, (unsigned long)mem / PAGE_SIZE * sizeof(u64), SEEK_SET); - read(fd, map, sizeof(u64) * PAGES_TO_TEST); - close(fd); -} - -static inline char map_p(u64 map) -{ - return map & PME_PRESENT ? 'p' : '-'; -} - -static inline char map_sd(u64 map) -{ - return map & PME_SOFT_DIRTY ? 'd' : '-'; -} - -static int check_pte(int step, int page, u64 *map, u64 want) -{ - if ((map[page] & want) != want) { - printf("Step %d Page %d has %c%c, want %c%c\n", - step, page, - map_p(map[page]), map_sd(map[page]), - map_p(want), map_sd(want)); - return 1; - } - - return 0; -} - -static void clear_refs(void) -{ - int fd; - char *v = "4"; - - fd = open("/proc/self/clear_refs", O_WRONLY); - if (write(fd, v, 3) < 3) { - perror("Can't clear soft-dirty bit"); - exit(1); - } - close(fd); -} - -int main(void) -{ - char *mem, x; - u64 map[PAGES_TO_TEST]; - - mem = mmap(NULL, PAGES_TO_TEST * PAGE_SIZE, - PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, 0, 0); - - x = mem[0]; - mem[2 * PAGE_SIZE] = 'c'; - get_pagemap2(mem, map); - - if (check_pte(1, 0, map, PME_PRESENT)) - return 1; - if (check_pte(1, 1, map, 0)) - return 1; - if (check_pte(1, 2, map, PME_PRESENT | PME_SOFT_DIRTY)) - return 1; - - clear_refs(); - get_pagemap2(mem, map); - - if (check_pte(2, 0, map, PME_PRESENT)) - return 1; - if (check_pte(2, 1, map, 0)) - return 1; - if (check_pte(2, 2, map, PME_PRESENT)) - return 1; - - mem[0] = 'a'; - mem[PAGE_SIZE] = 'b'; - x = mem[2 * PAGE_SIZE]; - get_pagemap2(mem, map); - - if (check_pte(3, 0, map, PME_PRESENT | PME_SOFT_DIRTY)) - return 1; - if (check_pte(3, 1, map, PME_PRESENT | PME_SOFT_DIRTY)) - return 1; - if (check_pte(3, 2, map, PME_PRESENT)) - return 1; - - (void)x; /* gcc warn */ - - printf("PASS\n"); - return 0; -} |
