From 4f1244c8298606b8fae64b4d78b820ae6b896e3c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 17 Feb 2017 13:59:39 +0100 Subject: block/sed-opal: allocate struct opal_dev dynamically Insted of bloating the containing structure with it all the time this allocates struct opal_dev dynamically. Additionally this allows moving the definition of struct opal_dev into sed-opal.c. For this a new private data field is added to it that is passed to the send/receive callback. After that a lot of internals can be made private as well. Signed-off-by: Christoph Hellwig Tested-by: Scott Bauer Reviewed-by: Scott Bauer Signed-off-by: Jens Axboe --- include/linux/sed-opal.h | 116 ++--------------------------------------------- 1 file changed, 4 insertions(+), 112 deletions(-) (limited to 'include/linux/sed-opal.h') diff --git a/include/linux/sed-opal.h b/include/linux/sed-opal.h index 205d520ea688..deee23d012e7 100644 --- a/include/linux/sed-opal.h +++ b/include/linux/sed-opal.h @@ -21,117 +21,14 @@ #include #include -/* - * These constant values come from: - * SPC-4 section - * 6.30 SECURITY PROTOCOL IN command / table 265. - */ -enum { - TCG_SECP_00 = 0, - TCG_SECP_01, -}; struct opal_dev; -#define IO_BUFFER_LENGTH 2048 -#define MAX_TOKS 64 - -typedef int (*opal_step)(struct opal_dev *dev); -typedef int (sec_send_recv)(struct opal_dev *ctx, u16 spsp, u8 secp, - void *buffer, size_t len, bool send); - - -enum opal_atom_width { - OPAL_WIDTH_TINY, - OPAL_WIDTH_SHORT, - OPAL_WIDTH_MEDIUM, - OPAL_WIDTH_LONG, - OPAL_WIDTH_TOKEN -}; - -/* - * Token defs derived from: - * TCG_Storage_Architecture_Core_Spec_v2.01_r1.00 - * 3.2.2 Data Stream Encoding - */ -enum opal_response_token { - OPAL_DTA_TOKENID_BYTESTRING = 0xe0, - OPAL_DTA_TOKENID_SINT = 0xe1, - OPAL_DTA_TOKENID_UINT = 0xe2, - OPAL_DTA_TOKENID_TOKEN = 0xe3, /* actual token is returned */ - OPAL_DTA_TOKENID_INVALID = 0X0 -}; - -/* - * On the parsed response, we don't store again the toks that are already - * stored in the response buffer. Instead, for each token, we just store a - * pointer to the position in the buffer where the token starts, and the size - * of the token in bytes. - */ -struct opal_resp_tok { - const u8 *pos; - size_t len; - enum opal_response_token type; - enum opal_atom_width width; - union { - u64 u; - s64 s; - } stored; -}; - -/* - * From the response header it's not possible to know how many tokens there are - * on the payload. So we hardcode that the maximum will be MAX_TOKS, and later - * if we start dealing with messages that have more than that, we can increase - * this number. This is done to avoid having to make two passes through the - * response, the first one counting how many tokens we have and the second one - * actually storing the positions. - */ -struct parsed_resp { - int num; - struct opal_resp_tok toks[MAX_TOKS]; -}; - -/** - * struct opal_dev - The structure representing a OPAL enabled SED. - * @supported: Whether or not OPAL is supported on this controller. - * @send_recv: The combined sec_send/sec_recv function pointer. - * @opal_step: A series of opal methods that are necessary to complete a command. - * @func_data: An array of parameters for the opal methods above. - * @state: Describes the current opal_step we're working on. - * @dev_lock: Locks the entire opal_dev structure. - * @parsed: Parsed response from controller. - * @prev_data: Data returned from a method to the controller. - * @unlk_lst: A list of Locking ranges to unlock on this device during a resume. - */ -struct opal_dev { - bool initialized; - bool supported; - sec_send_recv *send_recv; - - const opal_step *funcs; - void **func_data; - int state; - struct mutex dev_lock; - u16 comid; - u32 hsn; - u32 tsn; - u64 align; - u64 lowest_lba; - - size_t pos; - u8 cmd[IO_BUFFER_LENGTH]; - u8 resp[IO_BUFFER_LENGTH]; - - struct parsed_resp parsed; - size_t prev_d_len; - void *prev_data; - - struct list_head unlk_lst; -}; +typedef int (sec_send_recv)(void *data, u16 spsp, u8 secp, void *buffer, + size_t len, bool send); #ifdef CONFIG_BLK_SED_OPAL bool opal_unlock_from_suspend(struct opal_dev *dev); -void init_opal_dev(struct opal_dev *opal_dev, sec_send_recv *send_recv); +struct opal_dev *init_opal_dev(void *data, sec_send_recv *send_recv); int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *ioctl_ptr); static inline bool is_sed_ioctl(unsigned int cmd) @@ -168,11 +65,6 @@ static inline bool opal_unlock_from_suspend(struct opal_dev *dev) { return false; } -static inline void init_opal_dev(struct opal_dev *opal_dev, - sec_send_recv *send_recv) -{ - opal_dev->supported = false; - opal_dev->initialized = true; -} +#define init_opal_dev(data, send_recv) NULL #endif /* CONFIG_BLK_SED_OPAL */ #endif /* LINUX_OPAL_H */ -- cgit v1.2.3