Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e6af301b authored by Michael Chan's avatar Michael Chan Committed by David S. Miller
Browse files

[TG3]: Add nvram lock-out support for 5752 TPM 



Add support for the NVRAM lock-out feature for TPM in 5752. If lock-out
is enabled, certain NVRAM registers cannot be written to.

Signed-off-by: default avatarMichael Chan <mchan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 361b4ac2

drivers/net/tg3.c

+36 −34
Original line number Diff line number Diff line
@@ -3731,6 +3731,28 @@ static void tg3_nvram_unlock(struct tg3 *tp) 
		tw32_f(NVRAM_SWARB, SWARB_REQ_CLR1);

}



/* tp->lock is held. */

static void tg3_enable_nvram_access(struct tg3 *tp)

{

	if ((tp->tg3_flags2 & TG3_FLG2_5750_PLUS) &&

	    !(tp->tg3_flags2 & TG3_FLG2_PROTECTED_NVRAM)) {

		u32 nvaccess = tr32(NVRAM_ACCESS);



		tw32(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);

	}

}



/* tp->lock is held. */

static void tg3_disable_nvram_access(struct tg3 *tp)

{

	if ((tp->tg3_flags2 & TG3_FLG2_5750_PLUS) &&

	    !(tp->tg3_flags2 & TG3_FLG2_PROTECTED_NVRAM)) {

		u32 nvaccess = tr32(NVRAM_ACCESS);



		tw32(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);

	}

}



/* tp->lock is held. */

static void tg3_write_sig_pre_reset(struct tg3 *tp, int kind)

{
@@ -7102,6 +7124,10 @@ static void __devinit tg3_get_5752_nvram_info(struct tg3 *tp) 


	nvcfg1 = tr32(NVRAM_CFG1);



	/* NVRAM protection for TPM */

	if (nvcfg1 & (1 << 27))

		tp->tg3_flags2 |= TG3_FLG2_PROTECTED_NVRAM;



	switch (nvcfg1 & NVRAM_CFG1_5752VENDOR_MASK) {

		case FLASH_5752VENDOR_ATMEL_EEPROM_64KHZ:

		case FLASH_5752VENDOR_ATMEL_EEPROM_376KHZ:
@@ -7179,11 +7205,7 @@ static void __devinit tg3_nvram_init(struct tg3 *tp) 
	    GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5701) {

		tp->tg3_flags |= TG3_FLAG_NVRAM;



		if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS) {

			u32 nvaccess = tr32(NVRAM_ACCESS);



			tw32(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);

		}

		tg3_enable_nvram_access(tp);



		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)

			tg3_get_5752_nvram_info(tp);
@@ -7192,11 +7214,7 @@ static void __devinit tg3_nvram_init(struct tg3 *tp) 


		tg3_get_nvram_size(tp);



		if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS) {

			u32 nvaccess = tr32(NVRAM_ACCESS);



			tw32(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);

		}

		tg3_disable_nvram_access(tp);



	} else {

		tp->tg3_flags &= ~(TG3_FLAG_NVRAM | TG3_FLAG_NVRAM_BUFFERED);
@@ -7285,11 +7303,7 @@ static int tg3_nvram_read(struct tg3 *tp, u32 offset, u32 *val) 


	tg3_nvram_lock(tp);



	if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS) {

		u32 nvaccess = tr32(NVRAM_ACCESS);



		tw32_f(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);

	}

	tg3_enable_nvram_access(tp);



	tw32(NVRAM_ADDR, offset);

	ret = tg3_nvram_exec_cmd(tp, NVRAM_CMD_RD | NVRAM_CMD_GO |
@@ -7300,11 +7314,7 @@ static int tg3_nvram_read(struct tg3 *tp, u32 offset, u32 *val) 


	tg3_nvram_unlock(tp);



	if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS) {

		u32 nvaccess = tr32(NVRAM_ACCESS);



		tw32_f(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);

	}

	tg3_disable_nvram_access(tp);



	return ret;

}
@@ -7367,7 +7377,7 @@ static int tg3_nvram_write_block_unbuffered(struct tg3 *tp, u32 offset, u32 len, 


	while (len) {

		int j;

		u32 phy_addr, page_off, size, nvaccess;

		u32 phy_addr, page_off, size;



		phy_addr = offset & ~pagemask;
@@ -7390,8 +7400,7 @@ static int tg3_nvram_write_block_unbuffered(struct tg3 *tp, u32 offset, u32 len, 


		offset = offset + (pagesize - page_off);



		nvaccess = tr32(NVRAM_ACCESS);

		tw32_f(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);

		tg3_enable_nvram_access(tp);



		/*

		 * Before we can erase the flash page, we need
@@ -7528,13 +7537,10 @@ static int tg3_nvram_write_block(struct tg3 *tp, u32 offset, u32 len, u8 *buf) 


		tg3_nvram_lock(tp);



		if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS) {

			u32 nvaccess = tr32(NVRAM_ACCESS);



			tw32(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);



		tg3_enable_nvram_access(tp);

		if ((tp->tg3_flags2 & TG3_FLG2_5750_PLUS) &&

		    !(tp->tg3_flags2 & TG3_FLG2_PROTECTED_NVRAM))

			tw32(NVRAM_WRITE1, 0x406);

		}



		grc_mode = tr32(GRC_MODE);

		tw32(GRC_MODE, grc_mode | GRC_MODE_NVRAM_WR_ENABLE);
@@ -7553,11 +7559,7 @@ static int tg3_nvram_write_block(struct tg3 *tp, u32 offset, u32 len, u8 *buf) 
		grc_mode = tr32(GRC_MODE);

		tw32(GRC_MODE, grc_mode & ~GRC_MODE_NVRAM_WR_ENABLE);



		if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS) {

			u32 nvaccess = tr32(NVRAM_ACCESS);



			tw32(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);

		}

		tg3_disable_nvram_access(tp);

		tg3_nvram_unlock(tp);

	}

drivers/net/tg3.h

+1 −0
Original line number Diff line number Diff line
@@ -2122,6 +2122,7 @@ struct tg3 { 
#define TG3_FLG2_SERDES_PREEMPHASIS	0x00020000

#define TG3_FLG2_5705_PLUS		0x00040000

#define TG3_FLG2_5750_PLUS		0x00080000

#define TG3_FLG2_PROTECTED_NVRAM	0x00100000



	u32				split_mode_max_reqs;

#define SPLIT_MODE_5704_MAX_REQ		3