/*
 * CAAM Error Reporting
 *
 * Copyright 2009-2011 Freescale Semiconductor, Inc.
 */

#include "compat.h"
#include "regs.h"
#include "intern.h"
#include "desc.h"
#include "jr.h"
#include "error.h"

static const struct {
	u8 value;
	char *error_text;
} desc_error_list[] = {
	{ 0x00, "No error." },
	{ 0x01, "SGT Length Error. The descriptor is trying to read "
		"more data than is contained in the SGT table." },
	{ 0x02, "SGT Null Entry Error." },
	{ 0x03, "Job Ring Control Error. There is a bad value in the "
		"Job Ring Control register." },
	{ 0x04, "Invalid Descriptor Command. The Descriptor Command "
		"field is invalid." },
	{ 0x05, "Reserved." },
	{ 0x06, "Invalid KEY Command" },
	{ 0x07, "Invalid LOAD Command" },
	{ 0x08, "Invalid STORE Command" },
	{ 0x09, "Invalid OPERATION Command" },
	{ 0x0A, "Invalid FIFO LOAD Command" },
	{ 0x0B, "Invalid FIFO STORE Command" },
	{ 0x0C, "Invalid MOVE/MOVE_LEN Command" },
	{ 0x0D, "Invalid JUMP Command. A nonlocal JUMP Command is "
		"invalid because the target is not a Job Header "
		"Command, or the jump is from a Trusted Descriptor to "
		"a Job Descriptor, or because the target Descriptor "
		"contains a Shared Descriptor." },
	{ 0x0E, "Invalid MATH Command" },
	{ 0x0F, "Invalid SIGNATURE Command" },
	{ 0x10, "Invalid Sequence Command. A SEQ IN PTR OR SEQ OUT PTR "
		"Command is invalid or a SEQ KEY, SEQ LOAD, SEQ FIFO "
		"LOAD, or SEQ FIFO STORE decremented the input or "
		"output sequence length below 0. This error may result "
		"if a built-in PROTOCOL Command has encountered a "
		"malformed PDU." },
	{ 0x11, "Skip data type invalid. The type must be 0xE or 0xF."},
	{ 0x12, "Shared Descriptor Header Error" },
	{ 0x13, "Header Error. Invalid length or parity, or certain "
		"other problems." },
	{ 0x14, "Burster Error. Burster has gotten to an illegal "
		"state" },
	{ 0x15, "Context Register Length Error. The descriptor is "
		"trying to read or write past the end of the Context "
		"Register. A SEQ LOAD or SEQ STORE with the VLF bit "
		"set was executed with too large a length in the "
		"variable length register (VSOL for SEQ STORE or VSIL "
		"for SEQ LOAD)." },
	{ 0x16, "DMA Error" },
	{ 0x17, "Reserved." },
	{ 0x1A, "Job failed due to JR reset" },
	{ 0x1B, "Job failed due to Fail Mode" },
	{ 0x1C, "DECO Watchdog timer timeout error" },
	{ 0x1D, "DECO tried to copy a key from another DECO but the "
		"other DECO's Key Registers were locked" },
	{ 0x1E, "DECO attempted to copy data from a DECO that had an "
		"unmasked Descriptor error" },
	{ 0x1F, "LIODN error. DECO was trying to share from itself or "
		"from another DECO but the two Non-SEQ LIODN values "
		"didn't match or the 'shared from' DECO's Descriptor "
		"required that the SEQ LIODNs be the same and they "
		"aren't." },
	{ 0x20, "DECO has completed a reset initiated via the DRR "
		"register" },
	{ 0x21, "Nonce error. When using EKT (CCM) key encryption "
		"option in the FIFO STORE Command, the Nonce counter "
		"reached its maximum value and this encryption mode "
		"can no longer be used." },
	{ 0x22, "Meta data is too large (> 511 bytes) for TLS decap "
		"(input frame; block ciphers) and IPsec decap (output "
		"frame, when doing the next header byte update) and "
		"DCRC (output frame)." },
	{ 0x23, "Read Input Frame error" },
	{ 0x24, "JDKEK, TDKEK or TDSK not loaded error" },
	{ 0x80, "DNR (do not run) error" },
	{ 0x81, "undefined protocol command" },
	{ 0x82, "invalid setting in PDB" },
	{ 0x83, "Anti-replay LATE error" },
	{ 0x84, "Anti-replay REPLAY error" },
	{ 0x85, "Sequence number overflow" },
	{ 0x86, "Sigver invalid signature" },
	{ 0x87, "DSA Sign Illegal test descriptor" },
	{ 0x88, "Protocol Format Error - A protocol has seen an error "
		"in the format of data received. When running RSA, "
		"this means that formatting with random padding was "
		"used, and did not follow the form: 0x00, 0x02, 8-to-N "
		"bytes of non-zero pad, 0x00, F data." },
	{ 0x89, "Protocol Size Error - A protocol has seen an error in "
		"size. When running RSA, pdb size N < (size of F) when "
		"no formatting is used; or pdb size N < (F + 11) when "
		"formatting is used." },
	{ 0xC1, "Blob Command error: Undefined mode" },
	{ 0xC2, "Blob Command error: Secure Memory Blob mode error" },
	{ 0xC4, "Blob Command error: Black Blob key or input size "
		"error" },
	{ 0xC5, "Blob Command error: Invalid key destination" },
	{ 0xC8, "Blob Command error: Trusted/Secure mode error" },
	{ 0xF0, "IPsec TTL or hop limit field either came in as 0, "
		"or was decremented to 0" },
	{ 0xF1, "3GPP HFN matches or exceeds the Threshold" },
};

static const char * const cha_id_list[] = {
	"",
	"AES",
	"DES",
	"ARC4",
	"MDHA",
	"RNG",
	"SNOW f8",
	"Kasumi f8/9",
	"PKHA",
	"CRCA",
	"SNOW f9",
	"ZUCE",
	"ZUCA",
};

static const char * const err_id_list[] = {
	"No error.",
	"Mode error.",
	"Data size error.",
	"Key size error.",
	"PKHA A memory size error.",
	"PKHA B memory size error.",
	"Data arrived out of sequence error.",
	"PKHA divide-by-zero error.",
	"PKHA modulus even error.",
	"DES key parity error.",
	"ICV check failed.",
	"Hardware error.",
	"Unsupported CCM AAD size.",
	"Class 1 CHA is not reset",
	"Invalid CHA combination was selected",
	"Invalid CHA selected.",
};

static const char * const rng_err_id_list[] = {
	"",
	"",
	"",
	"Instantiate",
	"Not instantiated",
	"Test instantiate",
	"Prediction resistance",
	"Prediction resistance and test request",
	"Uninstantiate",
	"Secure key generation",
};

#define SPRINTFCAT(str, format, param, max_alloc)		\
{								\
	char *tmp;						\
								\
	tmp = kmalloc(sizeof(format) + max_alloc, GFP_ATOMIC);	\
	sprintf(tmp, format, param);				\
	strcat(str, tmp);					\
	kfree(tmp);						\
}

static void report_jump_idx(u32 status, char *outstr)
{
	u8 idx = (status & JRSTA_DECOERR_INDEX_MASK) >>
		  JRSTA_DECOERR_INDEX_SHIFT;

	if (status & JRSTA_DECOERR_JUMP)
		strcat(outstr, "jump tgt desc idx ");
	else
		strcat(outstr, "desc idx ");

	SPRINTFCAT(outstr, "%d: ", idx, sizeof("255"));
}

static void report_ccb_status(struct device *jrdev, u32 status,
			      const char *error, char *outstr)
{
	u8 cha_id = (status & JRSTA_CCBERR_CHAID_MASK) >>
		    JRSTA_CCBERR_CHAID_SHIFT;
	u8 err_id = status & JRSTA_CCBERR_ERRID_MASK;

	sprintf(outstr, "%s: ", error);

	report_jump_idx(status, outstr);

	if (cha_id < ARRAY_SIZE(cha_id_list)) {
		SPRINTFCAT(outstr, "%s: ", cha_id_list[cha_id],
			   strlen(cha_id_list[cha_id]));
	} else {
		SPRINTFCAT(outstr, "unidentified cha_id value 0x%02x: ",
			   cha_id, sizeof("ff"));
	}

	if ((cha_id << JRSTA_CCBERR_CHAID_SHIFT) == JRSTA_CCBERR_CHAID_RNG &&
	    err_id < ARRAY_SIZE(rng_err_id_list) &&
	    strlen(rng_err_id_list[err_id])) {
		/* RNG-only error */
		SPRINTFCAT(outstr, "%s", rng_err_id_list[err_id],
			   strlen(rng_err_id_list[err_id]));
	} else if (err_id < ARRAY_SIZE(err_id_list)) {
		SPRINTFCAT(outstr, "%s", err_id_list[err_id],
			   strlen(err_id_list[err_id]));
	} else {
		SPRINTFCAT(outstr, "unidentified err_id value 0x%02x",
			   err_id, sizeof("ff"));
	}
}

static void report_jump_status(struct device *jrdev, u32 status,
			       const char *error, char *outstr)
{
	sprintf(outstr, "%s: ", error);
	SPRINTFCAT(outstr, "%s() not implemented", __func__, sizeof(__func__));
}

static void report_deco_status(struct device *jrdev, u32 status,
			       const char *error, char *outstr)
{
	u8 desc_error = status & JRSTA_DECOERR_ERROR_MASK;
	int i;
	sprintf(outstr, "%s: ", error);

	report_jump_idx(status, outstr);

	for (i = 0; i < ARRAY_SIZE(desc_error_list); i++)
		if (desc_error_list[i].value == desc_error)
			break;

	if (i != ARRAY_SIZE(desc_error_list) && desc_error_list[i].error_text) {
		SPRINTFCAT(outstr, "%s", desc_error_list[i].error_text,
			   strlen(desc_error_list[i].error_text));
	} else {
		SPRINTFCAT(outstr, "unidentified error value 0x%02x",
			   desc_error, sizeof("ff"));
	}
}

static void report_jr_status(struct device *jrdev, u32 status,
			     const char *error, char *outstr)
{
	sprintf(outstr, "%s: ", error);
	SPRINTFCAT(outstr, "%s() not implemented", __func__, sizeof(__func__));
}

static void report_cond_code_status(struct device *jrdev, u32 status,
				    const char *error, char *outstr)
{
	sprintf(outstr, "%s: ", error);
	SPRINTFCAT(outstr, "%s() not implemented", __func__, sizeof(__func__));
}

void caam_jr_strstatus(struct device *jrdev, u32 status)
{
	char outstr[CAAM_ERROR_STR_MAX];
	static const struct stat_src {
		void (*report_ssed)(struct device *jrdev, u32 status,
				    const char *error, char *outstr);
		const char *error;
	} status_src[] = {
		{ NULL, "No error" },
		{ NULL, NULL },
		{ report_ccb_status, "CCB" },
		{ report_jump_status, "Jump" },
		{ report_deco_status, "DECO" },
		{ NULL, NULL },
		{ report_jr_status, "Job Ring" },
		{ report_cond_code_status, "Condition Code" },
	};
	u32 ssrc = status >> JRSTA_SSRC_SHIFT;

	/*
	 * If there is no further error handling function, just
	 * print the error code, error string and exit.
	 */
	if (!status_src[ssrc].report_ssed) {
		dev_err(jrdev, "%08x: %s: \n", status, status_src[ssrc].error);
		return;
	}

	status_src[ssrc].report_ssed(jrdev, status,
			status_src[ssrc].error, outstr);

	dev_err(jrdev, "%08x: %s\n", status, outstr);
}
EXPORT_SYMBOL(caam_jr_strstatus);