diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/char/Makefile | 1 | ||||
| -rw-r--r-- | drivers/char/hw_random/Kconfig | 17 | ||||
| -rw-r--r-- | drivers/char/hw_random/Makefile | 1 | ||||
| -rw-r--r-- | drivers/char/hw_random/omap-rng.c | 22 | ||||
| -rw-r--r-- | drivers/char/hw_random/pseries-rng.c | 96 | ||||
| -rw-r--r-- | drivers/char/mem.c | 42 | ||||
| -rw-r--r-- | drivers/char/ramoops.c | 250 | ||||
| -rw-r--r-- | drivers/char/virtio_console.c | 7 | ||||
| -rw-r--r-- | drivers/char/xilinx_hwicap/xilinx_hwicap.c | 30 | ||||
| -rw-r--r-- | drivers/char/xilinx_hwicap/xilinx_hwicap.h | 2 |
11 files changed, 155 insertions, 321 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index ee946865d6cb..ea6f6325f9ba 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -585,14 +585,6 @@ config DEVPORT source "drivers/s390/char/Kconfig" -config RAMOOPS - tristate "Log panic/oops to a RAM buffer" - depends on HAS_IOMEM - default n - help - This enables panic and oops messages to be logged to a circular - buffer in RAM where it can be read back at some later point. - config MSM_SMD_PKT bool "Enable device interface for some SMD packet ports" default n diff --git a/drivers/char/Makefile b/drivers/char/Makefile index 0dc5d7ce4864..d0b27a39f1d4 100644 --- a/drivers/char/Makefile +++ b/drivers/char/Makefile @@ -58,7 +58,6 @@ obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o obj-$(CONFIG_TCG_TPM) += tpm/ obj-$(CONFIG_PS3_FLASH) += ps3flash.o -obj-$(CONFIG_RAMOOPS) += ramoops.o obj-$(CONFIG_JS_RTC) += js-rtc.o js-rtc-y = rtc.o diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index 0689bf6b0183..f45dad39a18b 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -62,8 +62,8 @@ config HW_RANDOM_AMD config HW_RANDOM_ATMEL tristate "Atmel Random Number Generator support" - depends on HW_RANDOM && ARCH_AT91SAM9G45 - default HW_RANDOM + depends on HW_RANDOM && HAVE_CLK + default (HW_RANDOM && ARCH_AT91) ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on Atmel AT91 devices. @@ -250,3 +250,16 @@ config UML_RANDOM (check your distro, or download from http://sourceforge.net/projects/gkernel/). rngd periodically reads /dev/hwrng and injects the entropy into /dev/random. + +config HW_RANDOM_PSERIES + tristate "pSeries HW Random Number Generator support" + depends on HW_RANDOM && PPC64 && IBMVIO + default HW_RANDOM + ---help--- + This driver provides kernel-side support for the Random Number + Generator hardware found on POWER7+ machines and above + + To compile this driver as a module, choose M here: the + module will be called pseries-rng. + + If unsure, say Y. diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile index b2ff5265a996..d901dfa30321 100644 --- a/drivers/char/hw_random/Makefile +++ b/drivers/char/hw_random/Makefile @@ -22,3 +22,4 @@ obj-$(CONFIG_HW_RANDOM_OCTEON) += octeon-rng.o obj-$(CONFIG_HW_RANDOM_NOMADIK) += nomadik-rng.o obj-$(CONFIG_HW_RANDOM_PICOXCELL) += picoxcell-rng.o obj-$(CONFIG_HW_RANDOM_PPC4XX) += ppc4xx-rng.o +obj-$(CONFIG_HW_RANDOM_PSERIES) += pseries-rng.o diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c index a07a5caa599c..1412565c01af 100644 --- a/drivers/char/hw_random/omap-rng.c +++ b/drivers/char/hw_random/omap-rng.c @@ -115,22 +115,12 @@ static int __devinit omap_rng_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - ret = -ENOENT; - goto err_region; - } - - if (!request_mem_region(res->start, resource_size(res), pdev->name)) { - ret = -EBUSY; - goto err_region; - } - - dev_set_drvdata(&pdev->dev, res); - rng_base = ioremap(res->start, resource_size(res)); + rng_base = devm_request_and_ioremap(&pdev->dev, res); if (!rng_base) { ret = -ENOMEM; goto err_ioremap; } + dev_set_drvdata(&pdev->dev, res); ret = hwrng_register(&omap_rng_ops); if (ret) @@ -145,11 +135,8 @@ static int __devinit omap_rng_probe(struct platform_device *pdev) return 0; err_register: - iounmap(rng_base); rng_base = NULL; err_ioremap: - release_mem_region(res->start, resource_size(res)); -err_region: if (cpu_is_omap24xx()) { clk_disable(rng_ick); clk_put(rng_ick); @@ -159,20 +146,15 @@ err_region: static int __exit omap_rng_remove(struct platform_device *pdev) { - struct resource *res = dev_get_drvdata(&pdev->dev); - hwrng_unregister(&omap_rng_ops); omap_rng_write_reg(RNG_MASK_REG, 0x0); - iounmap(rng_base); - if (cpu_is_omap24xx()) { clk_disable(rng_ick); clk_put(rng_ick); } - release_mem_region(res->start, resource_size(res)); rng_base = NULL; return 0; diff --git a/drivers/char/hw_random/pseries-rng.c b/drivers/char/hw_random/pseries-rng.c new file mode 100644 index 000000000000..5f1197929f0c --- /dev/null +++ b/drivers/char/hw_random/pseries-rng.c @@ -0,0 +1,96 @@ +/* + * Copyright (C) 2010 Michael Neuling IBM Corporation + * + * Driver for the pseries hardware RNG for POWER7+ and above + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/module.h> +#include <linux/hw_random.h> +#include <asm/vio.h> + +#define MODULE_NAME "pseries-rng" + +static int pseries_rng_data_read(struct hwrng *rng, u32 *data) +{ + if (plpar_hcall(H_RANDOM, (unsigned long *)data) != H_SUCCESS) { + printk(KERN_ERR "pseries rng hcall error\n"); + return 0; + } + return 8; +} + +/** + * pseries_rng_get_desired_dma - Return desired DMA allocate for CMO operations + * + * This is a required function for a driver to operate in a CMO environment + * but this device does not make use of DMA allocations, return 0. + * + * Return value: + * Number of bytes of IO data the driver will need to perform well -> 0 + */ +static unsigned long pseries_rng_get_desired_dma(struct vio_dev *vdev) +{ + return 0; +}; + +static struct hwrng pseries_rng = { + .name = MODULE_NAME, + .data_read = pseries_rng_data_read, +}; + +static int __init pseries_rng_probe(struct vio_dev *dev, + const struct vio_device_id *id) +{ + return hwrng_register(&pseries_rng); +} + +static int __exit pseries_rng_remove(struct vio_dev *dev) +{ + hwrng_unregister(&pseries_rng); + return 0; +} + +static struct vio_device_id pseries_rng_driver_ids[] = { + { "ibm,random-v1", "ibm,random"}, + { "", "" } +}; +MODULE_DEVICE_TABLE(vio, pseries_rng_driver_ids); + +static struct vio_driver pseries_rng_driver = { + .name = MODULE_NAME, + .probe = pseries_rng_probe, + .remove = pseries_rng_remove, + .get_desired_dma = pseries_rng_get_desired_dma, + .id_table = pseries_rng_driver_ids +}; + +static int __init rng_init(void) +{ + printk(KERN_INFO "Registering IBM pSeries RNG driver\n"); + return vio_register_driver(&pseries_rng_driver); +} + +module_init(rng_init); + +static void __exit rng_exit(void) +{ + vio_unregister_driver(&pseries_rng_driver); +} +module_exit(rng_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Michael Neuling <mikey@neuling.org>"); +MODULE_DESCRIPTION("H/W RNG driver for IBM pSeries processors"); diff --git a/drivers/char/mem.c b/drivers/char/mem.c index d6e9d081c8b1..67c3371723cc 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -807,44 +807,6 @@ static const struct file_operations oldmem_fops = { }; #endif -static ssize_t kmsg_writev(struct kiocb *iocb, const struct iovec *iv, - unsigned long count, loff_t pos) -{ - char *line, *p; - int i; - ssize_t ret = -EFAULT; - size_t len = iov_length(iv, count); - - line = kmalloc(len + 1, GFP_KERNEL); - if (line == NULL) - return -ENOMEM; - - /* - * copy all vectors into a single string, to ensure we do - * not interleave our log line with other printk calls - */ - p = line; - for (i = 0; i < count; i++) { - if (copy_from_user(p, iv[i].iov_base, iv[i].iov_len)) - goto out; - p += iv[i].iov_len; - } - p[0] = '\0'; - - ret = printk("%s", line); - /* printk can add a prefix */ - if (ret > len) - ret = len; -out: - kfree(line); - return ret; -} - -static const struct file_operations kmsg_fops = { - .aio_write = kmsg_writev, - .llseek = noop_llseek, -}; - static const struct memdev { const char *name; umode_t mode; @@ -863,7 +825,9 @@ static const struct memdev { [7] = { "full", 0666, &full_fops, NULL }, [8] = { "random", 0666, &random_fops, NULL }, [9] = { "urandom", 0666, &urandom_fops, NULL }, - [11] = { "kmsg", 0, &kmsg_fops, NULL }, +#ifdef CONFIG_PRINTK + [11] = { "kmsg", 0644, &kmsg_fops, NULL }, +#endif #ifdef CONFIG_CRASH_DUMP [12] = { "oldmem", 0, &oldmem_fops, NULL }, #endif diff --git a/drivers/char/ramoops.c b/drivers/char/ramoops.c deleted file mode 100644 index 2a5e45d2a9f8..000000000000 --- a/drivers/char/ramoops.c +++ /dev/null @@ -1,250 +0,0 @@ -/* - * RAM Oops/Panic logger - * - * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/err.h> -#include <linux/module.h> -#include <linux/kmsg_dump.h> -#include <linux/time.h> -#include <linux/io.h> -#include <linux/ioport.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/ramoops.h> - -#define RAMOOPS_KERNMSG_HDR "====" -#define MIN_MEM_SIZE 4096UL - -static ulong record_size = MIN_MEM_SIZE; -module_param(record_size, ulong, 0400); -MODULE_PARM_DESC(record_size, - "size of each dump done on oops/panic"); - -static ulong mem_address; -module_param(mem_address, ulong, 0400); -MODULE_PARM_DESC(mem_address, - "start of reserved RAM used to store oops/panic logs"); - -static ulong mem_size; -module_param(mem_size, ulong, 0400); -MODULE_PARM_DESC(mem_size, - "size of reserved RAM used to store oops/panic logs"); - -static int dump_oops = 1; -module_param(dump_oops, int, 0600); -MODULE_PARM_DESC(dump_oops, - "set to 1 to dump oopses, 0 to only dump panics (default 1)"); - -static struct ramoops_context { - struct kmsg_dumper dump; - void *virt_addr; - phys_addr_t phys_addr; - unsigned long size; - unsigned long record_size; - int dump_oops; - int count; - int max_count; -} oops_cxt; - -static struct platform_device *dummy; -static struct ramoops_platform_data *dummy_data; - -static void ramoops_do_dump(struct kmsg_dumper *dumper, - enum kmsg_dump_reason reason, const char *s1, unsigned long l1, - const char *s2, unsigned long l2) -{ - struct ramoops_context *cxt = container_of(dumper, - struct ramoops_context, dump); - unsigned long s1_start, s2_start; - unsigned long l1_cpy, l2_cpy; - int res, hdr_size; - char *buf, *buf_orig; - struct timeval timestamp; - - if (reason != KMSG_DUMP_OOPS && - reason != KMSG_DUMP_PANIC) - return; - - /* Only dump oopses if dump_oops is set */ - if (reason == KMSG_DUMP_OOPS && !cxt->dump_oops) - return; - - buf = cxt->virt_addr + (cxt->count * cxt->record_size); - buf_orig = buf; - - memset(buf, '\0', cxt->record_size); - res = sprintf(buf, "%s", RAMOOPS_KERNMSG_HDR); - buf += res; - do_gettimeofday(×tamp); - res = sprintf(buf, "%lu.%lu\n", (long)timestamp.tv_sec, (long)timestamp.tv_usec); - buf += res; - - hdr_size = buf - buf_orig; - l2_cpy = min(l2, cxt->record_size - hdr_size); - l1_cpy = min(l1, cxt->record_size - hdr_size - l2_cpy); - - s2_start = l2 - l2_cpy; - s1_start = l1 - l1_cpy; - - memcpy(buf, s1 + s1_start, l1_cpy); - memcpy(buf + l1_cpy, s2 + s2_start, l2_cpy); - - cxt->count = (cxt->count + 1) % cxt->max_count; -} - -static int __init ramoops_probe(struct platform_device *pdev) -{ - struct ramoops_platform_data *pdata = pdev->dev.platform_data; - struct ramoops_context *cxt = &oops_cxt; - int err = -EINVAL; - - if (!pdata->mem_size || !pdata->record_size) { - pr_err("The memory size and the record size must be " - "non-zero\n"); - goto fail3; - } - - pdata->mem_size = rounddown_pow_of_two(pdata->mem_size); - pdata->record_size = rounddown_pow_of_two(pdata->record_size); - - /* Check for the minimum memory size */ - if (pdata->mem_size < MIN_MEM_SIZE && - pdata->record_size < MIN_MEM_SIZE) { - pr_err("memory size too small, minium is %lu\n", MIN_MEM_SIZE); - goto fail3; - } - - if (pdata->mem_size < pdata->record_size) { - pr_err("The memory size must be larger than the " - "records size\n"); - goto fail3; - } - - cxt->max_count = pdata->mem_size / pdata->record_size; - cxt->count = 0; - cxt->size = pdata->mem_size; - cxt->phys_addr = pdata->mem_address; - cxt->record_size = pdata->record_size; - cxt->dump_oops = pdata->dump_oops; - - if (!request_mem_region(cxt->phys_addr, cxt->size, "ramoops")) { - pr_err("request mem region failed\n"); - err = -EINVAL; - goto fail3; - } - - cxt->virt_addr = ioremap(cxt->phys_addr, cxt->size); - if (!cxt->virt_addr) { - pr_err("ioremap failed\n"); - goto fail2; - } - - cxt->dump.dump = ramoops_do_dump; - err = kmsg_dump_register(&cxt->dump); - if (err) { - pr_err("registering kmsg dumper failed\n"); - goto fail1; - } - - /* - * Update the module parameter variables as well so they are visible - * through /sys/module/ramoops/parameters/ - */ - mem_size = pdata->mem_size; - mem_address = pdata->mem_address; - record_size = pdata->record_size; - dump_oops = pdata->dump_oops; - - return 0; - -fail1: - iounmap(cxt->virt_addr); -fail2: - release_mem_region(cxt->phys_addr, cxt->size); -fail3: - return err; -} - -static int __exit ramoops_remove(struct platform_device *pdev) -{ - struct ramoops_context *cxt = &oops_cxt; - - if (kmsg_dump_unregister(&cxt->dump) < 0) - pr_warn("could not unregister kmsg_dumper\n"); - - iounmap(cxt->virt_addr); - release_mem_region(cxt->phys_addr, cxt->size); - return 0; -} - -static struct platform_driver ramoops_driver = { - .remove = __exit_p(ramoops_remove), - .driver = { - .name = "ramoops", - .owner = THIS_MODULE, - }, -}; - -static int __init ramoops_init(void) -{ - int ret; - ret = platform_driver_probe(&ramoops_driver, ramoops_probe); - if (ret == -ENODEV) { - /* - * If we didn't find a platform device, we use module parameters - * building platform data on the fly. - */ - pr_info("platform device not found, using module parameters\n"); - dummy_data = kzalloc(sizeof(struct ramoops_platform_data), - GFP_KERNEL); - if (!dummy_data) - return -ENOMEM; - dummy_data->mem_size = mem_size; - dummy_data->mem_address = mem_address; - dummy_data->record_size = record_size; - dummy_data->dump_oops = dump_oops; - dummy = platform_create_bundle(&ramoops_driver, ramoops_probe, - NULL, 0, dummy_data, - sizeof(struct ramoops_platform_data)); - - if (IS_ERR(dummy)) - ret = PTR_ERR(dummy); - else - ret = 0; - } - - return ret; -} - -static void __exit ramoops_exit(void) -{ - platform_driver_unregister(&ramoops_driver); - kfree(dummy_data); -} - -module_init(ramoops_init); -module_exit(ramoops_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Marco Stornelli <marco.stornelli@gmail.com>"); -MODULE_DESCRIPTION("RAM Oops/Panic logger/driver"); diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index ddf86b6500b7..cdf2f5451c76 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1895,6 +1895,13 @@ static int virtcons_restore(struct virtio_device *vdev) /* Get port open/close status on the host */ send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1); + + /* + * If a port was open at the time of suspending, we + * have to let the host know that it's still open. + */ + if (port->guest_connected) + send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 1); } return 0; } diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c b/drivers/char/xilinx_hwicap/xilinx_hwicap.c index 31ba11ca75e1..2c5d15beea35 100644 --- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c +++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c @@ -167,6 +167,7 @@ static const struct config_registers v4_config_registers = { .BOOTSTS = UNIMPLEMENTED, .CTL_1 = UNIMPLEMENTED, }; + static const struct config_registers v5_config_registers = { .CRC = 0, .FAR = 1, @@ -192,6 +193,31 @@ static const struct config_registers v5_config_registers = { .CTL_1 = 19, }; +static const struct config_registers v6_config_registers = { + .CRC = 0, + .FAR = 1, + .FDRI = 2, + .FDRO = 3, + .CMD = 4, + .CTL = 5, + .MASK = 6, + .STAT = 7, + .LOUT = 8, + .COR = 9, + .MFWR = 10, + .FLR = UNIMPLEMENTED, + .KEY = UNIMPLEMENTED, + .CBC = 11, + .IDCODE = 12, + .AXSS = 13, + .C0R_1 = 14, + .CSOB = 15, + .WBSTAR = 16, + .TIMER = 17, + .BOOTSTS = 22, + .CTL_1 = 24, +}; + /** * hwicap_command_desync - Send a DESYNC command to the ICAP port. * @drvdata: a pointer to the drvdata. @@ -744,6 +770,8 @@ static int __devinit hwicap_of_probe(struct platform_device *op, regs = &v4_config_registers; } else if (!strcmp(family, "virtex5")) { regs = &v5_config_registers; + } else if (!strcmp(family, "virtex6")) { + regs = &v6_config_registers; } } return hwicap_setup(&op->dev, id ? *id : -1, &res, config, @@ -785,6 +813,8 @@ static int __devinit hwicap_drv_probe(struct platform_device *pdev) regs = &v4_config_registers; } else if (!strcmp(family, "virtex5")) { regs = &v5_config_registers; + } else if (!strcmp(family, "virtex6")) { + regs = &v6_config_registers; } } diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.h b/drivers/char/xilinx_hwicap/xilinx_hwicap.h index 8cca11981c5f..d31ee23c9f13 100644 --- a/drivers/char/xilinx_hwicap/xilinx_hwicap.h +++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.h @@ -86,7 +86,7 @@ struct hwicap_driver_config { }; /* Number of times to poll the done regsiter */ -#define XHI_MAX_RETRIES 10 +#define XHI_MAX_RETRIES 5000 /************ Constant Definitions *************/ |
