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author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-06-02 12:35:47 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-06-02 12:35:47 +0200 |
commit | 5e7f8558475ea96283fec772381a46a12402c802 (patch) | |
tree | c58836ad66a5415931b76c942e2bc9ee9deb4bb7 /common | |
parent | e08e2faa04b4272a969c1551d5b6e184adfa1ec2 (diff) | |
parent | b27af5cdf36c099b2c4f29e9b71252cc8d66e223 (diff) | |
download | barebox-5e7f8558475ea96283fec772381a46a12402c802.tar.gz barebox-5e7f8558475ea96283fec772381a46a12402c802.tar.xz |
Merge branch 'for-next/block'
Diffstat (limited to 'common')
-rw-r--r-- | common/block.c | 38 | ||||
-rw-r--r-- | common/partitions.c | 2 | ||||
-rw-r--r-- | common/partitions/Kconfig | 1 | ||||
-rw-r--r-- | common/partitions/dos.c | 88 | ||||
-rw-r--r-- | common/partitions/efi.c | 4 |
5 files changed, 122 insertions, 11 deletions
diff --git a/common/block.c b/common/block.c index 120d65928e..ad07f8b2e2 100644 --- a/common/block.c +++ b/common/block.c @@ -176,7 +176,7 @@ static void *block_get(struct block_device *blk, int block) return outdata; } -static ssize_t block_read(struct cdev *cdev, void *buf, size_t count, +static ssize_t block_op_read(struct cdev *cdev, void *buf, size_t count, loff_t offset, unsigned long flags) { struct block_device *blk = cdev->priv; @@ -253,7 +253,7 @@ static int block_put(struct block_device *blk, const void *buf, int block) return 0; } -static ssize_t block_write(struct cdev *cdev, const void *buf, size_t count, +static ssize_t block_op_write(struct cdev *cdev, const void *buf, size_t count, loff_t offset, ulong flags) { struct block_device *blk = cdev->priv; @@ -310,14 +310,14 @@ static ssize_t block_write(struct cdev *cdev, const void *buf, size_t count, } #endif -static int block_close(struct cdev *cdev) +static int block_op_close(struct cdev *cdev) { struct block_device *blk = cdev->priv; return writebuffer_flush(blk); } -static int block_flush(struct cdev *cdev) +static int block_op_flush(struct cdev *cdev) { struct block_device *blk = cdev->priv; @@ -325,12 +325,12 @@ static int block_flush(struct cdev *cdev) } static struct file_operations block_ops = { - .read = block_read, + .read = block_op_read, #ifdef CONFIG_BLOCK_WRITE - .write = block_write, + .write = block_op_write, #endif - .close = block_close, - .flush = block_flush, + .close = block_op_close, + .flush = block_op_flush, .lseek = dev_lseek_default, }; @@ -387,3 +387,25 @@ int blockdevice_unregister(struct block_device *blk) return 0; } + +int block_read(struct block_device *blk, void *buf, int block, int num_blocks) +{ + int ret; + + ret = cdev_read(&blk->cdev, buf, + num_blocks << blk->blockbits, + (loff_t)block << blk->blockbits, 0); + + return ret < 0 ? ret : 0; +} + +int block_write(struct block_device *blk, void *buf, int block, int num_blocks) +{ + int ret; + + ret = cdev_write(&blk->cdev, buf, + num_blocks << blk->blockbits, + (loff_t)block << blk->blockbits, 0); + + return ret < 0 ? ret : 0; +} diff --git a/common/partitions.c b/common/partitions.c index 683b2586e4..35a604c35f 100644 --- a/common/partitions.c +++ b/common/partitions.c @@ -128,7 +128,7 @@ int parse_partition_table(struct block_device *blk) pdesc = xzalloc(sizeof(*pdesc)); buf = dma_alloc(SECTOR_SIZE * 2); - rc = blk->ops->read(blk, buf, 0, 2); + rc = block_read(blk, buf, 0, 2); if (rc != 0) { dev_err(blk->dev, "Cannot read MBR/partition table\n"); goto on_error; diff --git a/common/partitions/Kconfig b/common/partitions/Kconfig index 077091cde2..90238ad382 100644 --- a/common/partitions/Kconfig +++ b/common/partitions/Kconfig @@ -1,5 +1,6 @@ config PARTITION_DISK depends on PARTITION + depends on BLOCK bool "DISK partition support" help Add support for handling common partition tables on all kind of disk diff --git a/common/partitions/dos.c b/common/partitions/dos.c index 597f9ba581..b9f31c3784 100644 --- a/common/partitions/dos.c +++ b/common/partitions/dos.c @@ -16,6 +16,8 @@ #include <disks.h> #include <init.h> #include <asm/unaligned.h> +#include <dma.h> +#include <linux/err.h> #include "parser.h" @@ -40,6 +42,74 @@ static int disk_guess_size(struct device_d *dev, struct partition_entry *table) return (int)size; } +static void *read_mbr(struct block_device *blk) +{ + void *buf = dma_alloc(SECTOR_SIZE); + int ret; + + ret = block_read(blk, buf, 0, 1); + if (ret) { + free(buf); + return NULL; + } + + return buf; +} + +static int write_mbr(struct block_device *blk, void *buf) +{ + int ret; + + ret = block_write(blk, buf, 0, 1); + if (ret) + return ret; + + return block_flush(blk); +} + +struct disk_signature_priv { + uint32_t signature; + struct block_device *blk; +}; + +static int dos_set_disk_signature(struct param_d *p, void *_priv) +{ + struct disk_signature_priv *priv = _priv; + struct block_device *blk = priv->blk; + void *buf; + __le32 *disksigp; + int ret; + + buf = read_mbr(blk); + if (!buf) + return -EIO; + + disksigp = buf + 0x1b8; + + *disksigp = cpu_to_le32(priv->signature); + + ret = write_mbr(blk, buf); + + free(buf); + + return ret; +} + +static int dos_get_disk_signature(struct param_d *p, void *_priv) +{ + struct disk_signature_priv *priv = _priv; + struct block_device *blk = priv->blk; + void *buf; + + buf = read_mbr(blk); + if (!buf) + return -EIO; + + priv->signature = le32_to_cpup((__le32 *)(buf + 0x1b8)); + + return 0; +} + /** * Check if a DOS like partition describes this block device * @param blk Block device to register to @@ -55,6 +125,7 @@ static void dos_partition(void *buf, struct block_device *blk, struct partition pentry; uint8_t *buffer = buf; int i; + struct disk_signature_priv *dsp; table = (struct partition_entry *)&buffer[446]; @@ -74,6 +145,23 @@ static void dos_partition(void *buf, struct block_device *blk, dev_dbg(blk->dev, "Skipping empty partition %d\n", i); } } + + dsp = xzalloc(sizeof(*dsp)); + dsp->blk = blk; + + /* + * This parameter contains the NT disk signature. This allows to + * to specify the Linux rootfs using the following syntax: + * + * root=PARTUUID=ssssssss-pp + * + * where ssssssss is a zero-filled hex representation of the 32-bit + * signature and pp is a zero-filled hex representation of the 1-based + * partition number. + */ + dev_add_param_int(blk->dev, "nt_signature", + dos_set_disk_signature, dos_get_disk_signature, + &dsp->signature, "%08x", dsp); } static struct partition_parser dos = { diff --git a/common/partitions/efi.c b/common/partitions/efi.c index e450eebf77..ee1326e622 100644 --- a/common/partitions/efi.c +++ b/common/partitions/efi.c @@ -86,7 +86,7 @@ static gpt_entry *alloc_read_gpt_entries(struct block_device *blk, from = le64_to_cpu(pgpt_head->partition_entry_lba); size = count / GPT_BLOCK_SIZE; - ret = blk->ops->read(blk, pte, from, size); + ret = block_read(blk, pte, from, size); if (ret) { kfree(pte); pte=NULL; @@ -121,7 +121,7 @@ static gpt_header *alloc_read_gpt_header(struct block_device *blk, if (!gpt) return NULL; - ret = blk->ops->read(blk, gpt, lba, 1); + ret = block_read(blk, gpt, lba, 1); if (ret) { kfree(gpt); gpt=NULL; |