Messages in this thread Patch in this message | | | From | shiva.linuxworks@gmail ... | Subject | [PATCH 3/4] mtd: add advanced protection and security ioctls | Date | Wed, 27 Oct 2021 10:33:51 +0000 |
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From: Shivamurthy Shastri <sshivamurthy@micron.com>
Added new ioctls for advanced protection and security features. These features are currently supported by new Micron SPI NOR flashes.
Signed-off-by: Shivamurthy Shastri <sshivamurthy@micron.com> --- drivers/mtd/mtdchar.c | 145 +++++++++++++++++++++++++++++++++++++ include/uapi/mtd/mtd-abi.h | 11 +++ 2 files changed, 156 insertions(+)
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 155e991d9d75..97b97b80276d 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -654,6 +654,16 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg) case MTDFILEMODE: case BLKPG: case BLKRRPART: + case SECURE_PACKET_READ: + case SECURE_PACKET_WRITE: + case RD_VLOCK_BITS: + case WR_VLOCK_BITS: + case RD_NVLOCK_BITS: + case WR_NVLOCK_BITS: + case ER_NVLOCK_BITS: + case RD_GLOBAL_FREEZE_BITS: + case WR_GLOBAL_FREEZE_BITS: + case RD_PASSWORD: break; /* "dangerous" commands */ @@ -1017,6 +1027,141 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg) ret = 0; break; } + case SECURE_PACKET_READ: + { + struct mtd_oob_buf buf; + u8 *oobbuf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + oobbuf = kmalloc(buf.length, GFP_KERNEL); + ret = master->_secure_packet_read(master, buf.length, oobbuf); + if (copy_to_user(buf.ptr, oobbuf, buf.length)) + ret = -EFAULT; + break; + } + + case SECURE_PACKET_WRITE: + { + struct mtd_oob_buf buf; + u8 *oobbuf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + oobbuf = memdup_user(buf.ptr, buf.length); + ret = master->_secure_packet_write(master, buf.length, oobbuf); + break; + } + + case RD_VLOCK_BITS: + { + struct mtd_oob_buf buf; + u8 *oobbuf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + oobbuf = kmalloc(buf.length, GFP_KERNEL); + ret = master->_read_vlock_bits(master, buf.start, buf.length, + oobbuf); + if (copy_to_user(buf.ptr, oobbuf, buf.length)) + ret = -EFAULT; + break; + } + + case WR_VLOCK_BITS: + { + struct mtd_oob_buf buf; + u8 *oobbuf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + oobbuf = memdup_user(buf.ptr, buf.length); + ret = master->_write_vlock_bits(master, buf. start, buf.length, + oobbuf); + break; + } + + case RD_NVLOCK_BITS: + { + struct mtd_oob_buf buf; + u8 *oobbuf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + oobbuf = kmalloc(buf.length, GFP_KERNEL); + ret = master->_read_nvlock_bits(master, buf.start, buf.length, + oobbuf); + if (copy_to_user(buf.ptr, oobbuf, buf.length)) + ret = -EFAULT; + break; + } + + case WR_NVLOCK_BITS: + { + struct mtd_oob_buf buf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + ret = master->_write_nvlock_bits(master, buf.start); + break; + } + + case ER_NVLOCK_BITS: + { + ret = master->_erase_nvlock_bits(master); + break; + } + + case RD_GLOBAL_FREEZE_BITS: + { + struct mtd_oob_buf buf; + u8 *oobbuf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + oobbuf = kmalloc(buf.length, GFP_KERNEL); + ret = master->_read_global_freeze_bits(master, buf.length, + oobbuf); + if (copy_to_user(buf.ptr, oobbuf, buf.length)) + ret = -EFAULT; + break; + } + + case WR_GLOBAL_FREEZE_BITS: + { + struct mtd_oob_buf buf; + u8 *oobbuf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + oobbuf = memdup_user(buf.ptr, buf.length); + ret = master->_write_global_freeze_bits(master, buf.length, + oobbuf); + break; + } + + case RD_PASSWORD: + { + struct mtd_oob_buf buf; + u8 *oobbuf; + + if (copy_from_user(&buf, argp, sizeof(buf))) + ret = -EFAULT; + + oobbuf = kmalloc(buf.length, GFP_KERNEL); + ret = master->_read_password(master, buf.length, oobbuf); + if (copy_to_user(buf.ptr, oobbuf, buf.length)) + ret = -EFAULT; + break; + } } return ret; diff --git a/include/uapi/mtd/mtd-abi.h b/include/uapi/mtd/mtd-abi.h index b869990c2db2..dbd7bf60d484 100644 --- a/include/uapi/mtd/mtd-abi.h +++ b/include/uapi/mtd/mtd-abi.h @@ -208,6 +208,17 @@ struct otp_info { /* Erase a given range of user data (must be in mode %MTD_FILE_MODE_OTP_USER) */ #define OTPERASE _IOW('M', 25, struct otp_info) +#define SECURE_PACKET_READ _IOWR('M', 26, struct mtd_oob_buf) +#define SECURE_PACKET_WRITE _IOWR('M', 27, struct mtd_oob_buf) +#define RD_VLOCK_BITS _IOWR('M', 28, struct mtd_oob_buf) +#define WR_VLOCK_BITS _IOWR('M', 29, struct mtd_oob_buf) +#define RD_NVLOCK_BITS _IOWR('M', 30, struct mtd_oob_buf) +#define WR_NVLOCK_BITS _IOWR('M', 31, struct mtd_oob_buf) +#define ER_NVLOCK_BITS _IO('M', 32) +#define RD_GLOBAL_FREEZE_BITS _IOWR('M', 33, struct mtd_oob_buf) +#define WR_GLOBAL_FREEZE_BITS _IOWR('M', 34, struct mtd_oob_buf) +#define RD_PASSWORD _IOWR('M', 35, struct mtd_oob_buf) + /* * Obsolete legacy interface. Keep it in order not to break userspace * interfaces -- 2.25.1
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