diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-06 14:18:59 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-06 14:18:59 -0800 |
commit | 45763bf4bc1ebdf8eb95697607e1fd042a3e1221 (patch) | |
tree | c5b26c2d5d1190247b59d6d1fe68b8a247351362 /arch/powerpc/kernel | |
parent | da2577fe63f865cd9dc785a42c29c0071f567a35 (diff) | |
parent | 142a0f83b216a607aebed42e54a1be620765e28c (diff) |
Merge tag 'char-misc-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big char/misc driver patch pull request for 5.1-rc1.
The largest thing by far is the new habanalabs driver for their AI
accelerator chip. For now it is in the drivers/misc directory but will
probably move to a new directory soon along with other drivers of this
type.
Other than that, just the usual set of individual driver updates and
fixes. There's an "odd" merge in here from the DRM tree that they
asked me to do as the MEI driver is starting to interact with the i915
driver, and it needed some coordination. All of those patches have
been properly acked by the relevant subsystem maintainers.
All of these have been in linux-next with no reported issues, most for
quite some time"
* tag 'char-misc-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (219 commits)
habanalabs: adjust Kconfig to fix build errors
habanalabs: use %px instead of %p in error print
habanalabs: use do_div for 64-bit divisions
intel_th: gth: Fix an off-by-one in output unassigning
habanalabs: fix little-endian<->cpu conversion warnings
habanalabs: use NULL to initialize array of pointers
habanalabs: fix little-endian<->cpu conversion warnings
habanalabs: soft-reset device if context-switch fails
habanalabs: print pointer using %p
habanalabs: fix memory leak with CBs with unaligned size
habanalabs: return correct error code on MMU mapping failure
habanalabs: add comments in uapi/misc/habanalabs.h
habanalabs: extend QMAN0 job timeout
habanalabs: set DMA0 completion to SOB 1007
habanalabs: fix validation of WREG32 to DMA completion
habanalabs: fix mmu cache registers init
habanalabs: disable CPU access on timeouts
habanalabs: add MMU DRAM default page mapping
habanalabs: Dissociate RAZWI info from event types
misc/habanalabs: adjust Kconfig to fix build errors
...
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r-- | arch/powerpc/kernel/nvram_64.c | 158 | ||||
-rw-r--r-- | arch/powerpc/kernel/setup_32.c | 36 |
2 files changed, 3 insertions, 191 deletions
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c index 38b03a330cd2..244d2462e781 100644 --- a/arch/powerpc/kernel/nvram_64.c +++ b/arch/powerpc/kernel/nvram_64.c @@ -7,12 +7,6 @@ * 2 of the License, or (at your option) any later version. * * /dev/nvram driver for PPC64 - * - * This perhaps should live in drivers/char - * - * TODO: Split the /dev/nvram part (that one can use - * drivers/char/generic_nvram.c) from the arch & partition - * parsing code. */ #include <linux/types.h> @@ -714,137 +708,6 @@ static void oops_to_nvram(struct kmsg_dumper *dumper, spin_unlock_irqrestore(&lock, flags); } -static loff_t dev_nvram_llseek(struct file *file, loff_t offset, int origin) -{ - if (ppc_md.nvram_size == NULL) - return -ENODEV; - return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE, - ppc_md.nvram_size()); -} - - -static ssize_t dev_nvram_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - ssize_t ret; - char *tmp = NULL; - ssize_t size; - - if (!ppc_md.nvram_size) { - ret = -ENODEV; - goto out; - } - - size = ppc_md.nvram_size(); - if (size < 0) { - ret = size; - goto out; - } - - if (*ppos >= size) { - ret = 0; - goto out; - } - - count = min_t(size_t, count, size - *ppos); - count = min(count, PAGE_SIZE); - - tmp = kmalloc(count, GFP_KERNEL); - if (!tmp) { - ret = -ENOMEM; - goto out; - } - - ret = ppc_md.nvram_read(tmp, count, ppos); - if (ret <= 0) - goto out; - - if (copy_to_user(buf, tmp, ret)) - ret = -EFAULT; - -out: - kfree(tmp); - return ret; - -} - -static ssize_t dev_nvram_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) -{ - ssize_t ret; - char *tmp = NULL; - ssize_t size; - - ret = -ENODEV; - if (!ppc_md.nvram_size) - goto out; - - ret = 0; - size = ppc_md.nvram_size(); - if (*ppos >= size || size < 0) - goto out; - - count = min_t(size_t, count, size - *ppos); - count = min(count, PAGE_SIZE); - - tmp = memdup_user(buf, count); - if (IS_ERR(tmp)) { - ret = PTR_ERR(tmp); - goto out; - } - - ret = ppc_md.nvram_write(tmp, count, ppos); - - kfree(tmp); -out: - return ret; -} - -static long dev_nvram_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - switch(cmd) { -#ifdef CONFIG_PPC_PMAC - case OBSOLETE_PMAC_NVRAM_GET_OFFSET: - printk(KERN_WARNING "nvram: Using obsolete PMAC_NVRAM_GET_OFFSET ioctl\n"); - /* fall through */ - case IOC_NVRAM_GET_OFFSET: { - int part, offset; - - if (!machine_is(powermac)) - return -EINVAL; - if (copy_from_user(&part, (void __user*)arg, sizeof(part)) != 0) - return -EFAULT; - if (part < pmac_nvram_OF || part > pmac_nvram_NR) - return -EINVAL; - offset = pmac_get_partition(part); - if (offset < 0) - return offset; - if (copy_to_user((void __user*)arg, &offset, sizeof(offset)) != 0) - return -EFAULT; - return 0; - } -#endif /* CONFIG_PPC_PMAC */ - default: - return -EINVAL; - } -} - -static const struct file_operations nvram_fops = { - .owner = THIS_MODULE, - .llseek = dev_nvram_llseek, - .read = dev_nvram_read, - .write = dev_nvram_write, - .unlocked_ioctl = dev_nvram_ioctl, -}; - -static struct miscdevice nvram_dev = { - NVRAM_MINOR, - "nvram", - &nvram_fops -}; - - #ifdef DEBUG_NVRAM static void __init nvram_print_partitions(char * label) { @@ -992,6 +855,8 @@ loff_t __init nvram_create_partition(const char *name, int sig, long size = 0; int rc; + BUILD_BUG_ON(NVRAM_BLOCK_LEN != 16); + /* Convert sizes from bytes to blocks */ req_size = _ALIGN_UP(req_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN; min_size = _ALIGN_UP(min_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN; @@ -1192,22 +1057,3 @@ int __init nvram_scan_partitions(void) kfree(header); return err; } - -static int __init nvram_init(void) -{ - int rc; - - BUILD_BUG_ON(NVRAM_BLOCK_LEN != 16); - - if (ppc_md.nvram_size == NULL || ppc_md.nvram_size() <= 0) - return -ENODEV; - - rc = misc_register(&nvram_dev); - if (rc != 0) { - printk(KERN_ERR "nvram_init: failed to register device\n"); - return rc; - } - - return rc; -} -device_initcall(nvram_init); diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 947f904688b0..c31082233a25 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -17,6 +17,7 @@ #include <linux/console.h> #include <linux/memblock.h> #include <linux/export.h> +#include <linux/nvram.h> #include <asm/io.h> #include <asm/prom.h> @@ -147,41 +148,6 @@ static int __init ppc_setup_l3cr(char *str) } __setup("l3cr=", ppc_setup_l3cr); -#ifdef CONFIG_GENERIC_NVRAM - -/* Generic nvram hooks used by drivers/char/gen_nvram.c */ -unsigned char nvram_read_byte(int addr) -{ - if (ppc_md.nvram_read_val) - return ppc_md.nvram_read_val(addr); - return 0xff; -} -EXPORT_SYMBOL(nvram_read_byte); - -void nvram_write_byte(unsigned char val, int addr) -{ - if (ppc_md.nvram_write_val) - ppc_md.nvram_write_val(addr, val); -} -EXPORT_SYMBOL(nvram_write_byte); - -ssize_t nvram_get_size(void) -{ - if (ppc_md.nvram_size) - return ppc_md.nvram_size(); - return -1; -} -EXPORT_SYMBOL(nvram_get_size); - -void nvram_sync(void) -{ - if (ppc_md.nvram_sync) - ppc_md.nvram_sync(); -} -EXPORT_SYMBOL(nvram_sync); - -#endif /* CONFIG_NVRAM */ - static int __init ppc_init(void) { /* clear the progress line */ |