diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/dma-buf.c | 165 | ||||
| -rw-r--r-- | drivers/base/power/clock_ops.c | 1 | ||||
| -rw-r--r-- | drivers/base/power/common.c | 1 | ||||
| -rw-r--r-- | drivers/base/power/opp.c | 1 | ||||
| -rw-r--r-- | drivers/base/regmap/regcache-lzo.c | 3 | ||||
| -rw-r--r-- | drivers/base/regmap/regcache-rbtree.c | 1 | ||||
| -rw-r--r-- | drivers/base/regmap/regcache.c | 1 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-debugfs.c | 1 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-irq.c | 1 |
9 files changed, 150 insertions, 25 deletions
diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c index e38ad243b4b..07cbbc6fddb 100644 --- a/drivers/base/dma-buf.c +++ b/drivers/base/dma-buf.c @@ -71,7 +71,7 @@ static inline int is_dma_buf_file(struct file *file) * ops, or error in allocating struct dma_buf, will return negative error. * */ -struct dma_buf *dma_buf_export(void *priv, struct dma_buf_ops *ops, +struct dma_buf *dma_buf_export(void *priv, const struct dma_buf_ops *ops, size_t size, int flags) { struct dma_buf *dmabuf; @@ -80,7 +80,9 @@ struct dma_buf *dma_buf_export(void *priv, struct dma_buf_ops *ops, if (WARN_ON(!priv || !ops || !ops->map_dma_buf || !ops->unmap_dma_buf - || !ops->release)) { + || !ops->release + || !ops->kmap_atomic + || !ops->kmap)) { return ERR_PTR(-EINVAL); } @@ -107,17 +109,18 @@ EXPORT_SYMBOL_GPL(dma_buf_export); /** * dma_buf_fd - returns a file descriptor for the given dma_buf * @dmabuf: [in] pointer to dma_buf for which fd is required. + * @flags: [in] flags to give to fd * * On success, returns an associated 'fd'. Else, returns error. */ -int dma_buf_fd(struct dma_buf *dmabuf) +int dma_buf_fd(struct dma_buf *dmabuf, int flags) { int error, fd; if (!dmabuf || !dmabuf->file) return -EINVAL; - error = get_unused_fd(); + error = get_unused_fd_flags(flags); if (error < 0) return error; fd = error; @@ -185,17 +188,18 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach; int ret; - if (WARN_ON(!dmabuf || !dev || !dmabuf->ops)) + if (WARN_ON(!dmabuf || !dev)) return ERR_PTR(-EINVAL); attach = kzalloc(sizeof(struct dma_buf_attachment), GFP_KERNEL); if (attach == NULL) - goto err_alloc; - - mutex_lock(&dmabuf->lock); + return ERR_PTR(-ENOMEM); attach->dev = dev; attach->dmabuf = dmabuf; + + mutex_lock(&dmabuf->lock); + if (dmabuf->ops->attach) { ret = dmabuf->ops->attach(dmabuf, dev, attach); if (ret) @@ -206,8 +210,6 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, mutex_unlock(&dmabuf->lock); return attach; -err_alloc: - return ERR_PTR(-ENOMEM); err_attach: kfree(attach); mutex_unlock(&dmabuf->lock); @@ -224,7 +226,7 @@ EXPORT_SYMBOL_GPL(dma_buf_attach); */ void dma_buf_detach(struct dma_buf *dmabuf, struct dma_buf_attachment *attach) { - if (WARN_ON(!dmabuf || !attach || !dmabuf->ops)) + if (WARN_ON(!dmabuf || !attach)) return; mutex_lock(&dmabuf->lock); @@ -255,13 +257,10 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach, might_sleep(); - if (WARN_ON(!attach || !attach->dmabuf || !attach->dmabuf->ops)) + if (WARN_ON(!attach || !attach->dmabuf)) return ERR_PTR(-EINVAL); - mutex_lock(&attach->dmabuf->lock); - if (attach->dmabuf->ops->map_dma_buf) - sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction); - mutex_unlock(&attach->dmabuf->lock); + sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction); return sg_table; } @@ -273,19 +272,137 @@ EXPORT_SYMBOL_GPL(dma_buf_map_attachment); * dma_buf_ops. * @attach: [in] attachment to unmap buffer from * @sg_table: [in] scatterlist info of the buffer to unmap + * @direction: [in] direction of DMA transfer * */ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, - struct sg_table *sg_table) + struct sg_table *sg_table, + enum dma_data_direction direction) { - if (WARN_ON(!attach || !attach->dmabuf || !sg_table - || !attach->dmabuf->ops)) + if (WARN_ON(!attach || !attach->dmabuf || !sg_table)) return; - mutex_lock(&attach->dmabuf->lock); - if (attach->dmabuf->ops->unmap_dma_buf) - attach->dmabuf->ops->unmap_dma_buf(attach, sg_table); - mutex_unlock(&attach->dmabuf->lock); - + attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, + direction); } EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment); + + +/** + * dma_buf_begin_cpu_access - Must be called before accessing a dma_buf from the + * cpu in the kernel context. Calls begin_cpu_access to allow exporter-specific + * preparations. Coherency is only guaranteed in the specified range for the + * specified access direction. + * @dma_buf: [in] buffer to prepare cpu access for. + * @start: [in] start of range for cpu access. + * @len: [in] length of range for cpu access. + * @direction: [in] length of range for cpu access. + * + * Can return negative error values, returns 0 on success. + */ +int dma_buf_begin_cpu_access(struct dma_buf *dmabuf, size_t start, size_t len, + enum dma_data_direction direction) +{ + int ret = 0; + + if (WARN_ON(!dmabuf)) + return -EINVAL; + + if (dmabuf->ops->begin_cpu_access) + ret = dmabuf->ops->begin_cpu_access(dmabuf, start, len, direction); + + return ret; +} +EXPORT_SYMBOL_GPL(dma_buf_begin_cpu_access); + +/** + * dma_buf_end_cpu_access - Must be called after accessing a dma_buf from the + * cpu in the kernel context. Calls end_cpu_access to allow exporter-specific + * actions. Coherency is only guaranteed in the specified range for the + * specified access direction. + * @dma_buf: [in] buffer to complete cpu access for. + * @start: [in] start of range for cpu access. + * @len: [in] length of range for cpu access. + * @direction: [in] length of range for cpu access. + * + * This call must always succeed. + */ +void dma_buf_end_cpu_access(struct dma_buf *dmabuf, size_t start, size_t len, + enum dma_data_direction direction) +{ + WARN_ON(!dmabuf); + + if (dmabuf->ops->end_cpu_access) + dmabuf->ops->end_cpu_access(dmabuf, start, len, direction); +} +EXPORT_SYMBOL_GPL(dma_buf_end_cpu_access); + +/** + * dma_buf_kmap_atomic - Map a page of the buffer object into kernel address + * space. The same restrictions as for kmap_atomic and friends apply. + * @dma_buf: [in] buffer to map page from. + * @page_num: [in] page in PAGE_SIZE units to map. + * + * This call must always succeed, any necessary preparations that might fail + * need to be done in begin_cpu_access. + */ +void *dma_buf_kmap_atomic(struct dma_buf *dmabuf, unsigned long page_num) +{ + WARN_ON(!dmabuf); + + return dmabuf->ops->kmap_atomic(dmabuf, page_num); +} +EXPORT_SYMBOL_GPL(dma_buf_kmap_atomic); + +/** + * dma_buf_kunmap_atomic - Unmap a page obtained by dma_buf_kmap_atomic. + * @dma_buf: [in] buffer to unmap page from. + * @page_num: [in] page in PAGE_SIZE units to unmap. + * @vaddr: [in] kernel space pointer obtained from dma_buf_kmap_atomic. + * + * This call must always succeed. + */ +void dma_buf_kunmap_atomic(struct dma_buf *dmabuf, unsigned long page_num, + void *vaddr) +{ + WARN_ON(!dmabuf); + + if (dmabuf->ops->kunmap_atomic) + dmabuf->ops->kunmap_atomic(dmabuf, page_num, vaddr); +} +EXPORT_SYMBOL_GPL(dma_buf_kunmap_atomic); + +/** + * dma_buf_kmap - Map a page of the buffer object into kernel address space. The + * same restrictions as for kmap and friends apply. + * @dma_buf: [in] buffer to map page from. + * @page_num: [in] page in PAGE_SIZE units to map. + * + * This call must always succeed, any necessary preparations that might fail + * need to be done in begin_cpu_access. + */ +void *dma_buf_kmap(struct dma_buf *dmabuf, unsigned long page_num) +{ + WARN_ON(!dmabuf); + + return dmabuf->ops->kmap(dmabuf, page_num); +} +EXPORT_SYMBOL_GPL(dma_buf_kmap); + +/** + * dma_buf_kunmap - Unmap a page obtained by dma_buf_kmap. + * @dma_buf: [in] buffer to unmap page from. + * @page_num: [in] page in PAGE_SIZE units to unmap. + * @vaddr: [in] kernel space pointer obtained from dma_buf_kmap. + * + * This call must always succeed. + */ +void dma_buf_kunmap(struct dma_buf *dmabuf, unsigned long page_num, + void *vaddr) +{ + WARN_ON(!dmabuf); + + if (dmabuf->ops->kunmap) + dmabuf->ops->kunmap(dmabuf, page_num, vaddr); +} +EXPORT_SYMBOL_GPL(dma_buf_kunmap); diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c index 428e55e012d..869d7ff2227 100644 --- a/drivers/base/power/clock_ops.c +++ b/drivers/base/power/clock_ops.c @@ -8,6 +8,7 @@ #include <linux/init.h> #include <linux/kernel.h> +#include <linux/device.h> #include <linux/io.h> #include <linux/pm.h> #include <linux/pm_clock.h> diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c index 4af7c1cbf90..a14085cc613 100644 --- a/drivers/base/power/common.c +++ b/drivers/base/power/common.c @@ -8,6 +8,7 @@ #include <linux/init.h> #include <linux/kernel.h> +#include <linux/device.h> #include <linux/export.h> #include <linux/slab.h> #include <linux/pm_clock.h> diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index 95706fa24c7..ac993eafec8 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/cpufreq.h> +#include <linux/device.h> #include <linux/list.h> #include <linux/rculist.h> #include <linux/rcupdate.h> diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c index 8d006156932..483b06d4a38 100644 --- a/drivers/base/regmap/regcache-lzo.c +++ b/drivers/base/regmap/regcache-lzo.c @@ -11,6 +11,7 @@ */ #include <linux/slab.h> +#include <linux/device.h> #include <linux/lzo.h> #include "internal.h" @@ -341,7 +342,7 @@ static int regcache_lzo_sync(struct regmap *map, unsigned int min, lzo_blocks = map->cache; i = min; - for_each_set_bit_cont(i, lzo_blocks[0]->sync_bmp, + for_each_set_bit_from(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) { if (i > max) continue; diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index 8d51916a283..5157fa04c2f 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -11,6 +11,7 @@ */ #include <linux/slab.h> +#include <linux/device.h> #include <linux/debugfs.h> #include <linux/rbtree.h> #include <linux/seq_file.h> diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 938cb1d2ea2..87f54dbf601 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -12,6 +12,7 @@ #include <linux/slab.h> #include <linux/export.h> +#include <linux/device.h> #include <trace/events/regmap.h> #include <linux/bsearch.h> #include <linux/sort.h> diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index 372f81a2120..58517a5dac1 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -14,6 +14,7 @@ #include <linux/mutex.h> #include <linux/debugfs.h> #include <linux/uaccess.h> +#include <linux/device.h> #include "internal.h" diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 428836fc583..1befaa7a31c 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -11,6 +11,7 @@ */ #include <linux/export.h> +#include <linux/device.h> #include <linux/regmap.h> #include <linux/irq.h> #include <linux/interrupt.h> |