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bnx2x: Configure device endianity on driver load and reset endianity on removal. 

Some hosts can be both little and big endian.
In certain scenarios a big endian kernel can kexec a little endian kernel.

This patch fixes this case from both ends:
1) Return endianity to original values on shutdown (in case little endian kernel boots after we shutdown).
2) Do not rely on HW reset values when loading driver in little endian kernel
   but configure them explicitly (in case previous kernel was big endian and did not reset the HW).

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Manish Chopra 2014-09-02 04:31:25 -04:00 committed by David S. Miller
parent 511c24456a
commit 04860eb7d9
1 changed files with 39 additions and 18 deletions
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57
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
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@ -6849,6 +6849,37 @@ static void bnx2x__common_init_phy(struct bnx2x *bp)
bnx2x_release_phy_lock(bp);
}
static void bnx2x_config_endianity(struct bnx2x *bp, u32 val)
{
REG_WR(bp, PXP2_REG_RQ_QM_ENDIAN_M, val);
REG_WR(bp, PXP2_REG_RQ_TM_ENDIAN_M, val);
REG_WR(bp, PXP2_REG_RQ_SRC_ENDIAN_M, val);
REG_WR(bp, PXP2_REG_RQ_CDU_ENDIAN_M, val);
REG_WR(bp, PXP2_REG_RQ_DBG_ENDIAN_M, val);
/* make sure this value is 0 */
REG_WR(bp, PXP2_REG_RQ_HC_ENDIAN_M, 0);
REG_WR(bp, PXP2_REG_RD_QM_SWAP_MODE, val);
REG_WR(bp, PXP2_REG_RD_TM_SWAP_MODE, val);
REG_WR(bp, PXP2_REG_RD_SRC_SWAP_MODE, val);
REG_WR(bp, PXP2_REG_RD_CDURD_SWAP_MODE, val);
}
static void bnx2x_set_endianity(struct bnx2x *bp)
{
#ifdef __BIG_ENDIAN
bnx2x_config_endianity(bp, 1);
#else
bnx2x_config_endianity(bp, 0);
#endif
}
static void bnx2x_reset_endianity(struct bnx2x *bp)
{
bnx2x_config_endianity(bp, 0);
}
/**
* bnx2x_init_hw_common - initialize the HW at the COMMON phase.
*
@ -6915,23 +6946,7 @@ static int bnx2x_init_hw_common(struct bnx2x *bp)
bnx2x_init_block(bp, BLOCK_PXP2, PHASE_COMMON);
bnx2x_init_pxp(bp);
#ifdef __BIG_ENDIAN
REG_WR(bp, PXP2_REG_RQ_QM_ENDIAN_M, 1);
REG_WR(bp, PXP2_REG_RQ_TM_ENDIAN_M, 1);
REG_WR(bp, PXP2_REG_RQ_SRC_ENDIAN_M, 1);
REG_WR(bp, PXP2_REG_RQ_CDU_ENDIAN_M, 1);
REG_WR(bp, PXP2_REG_RQ_DBG_ENDIAN_M, 1);
/* make sure this value is 0 */
REG_WR(bp, PXP2_REG_RQ_HC_ENDIAN_M, 0);
/* REG_WR(bp, PXP2_REG_RD_PBF_SWAP_MODE, 1); */
REG_WR(bp, PXP2_REG_RD_QM_SWAP_MODE, 1);
REG_WR(bp, PXP2_REG_RD_TM_SWAP_MODE, 1);
REG_WR(bp, PXP2_REG_RD_SRC_SWAP_MODE, 1);
REG_WR(bp, PXP2_REG_RD_CDURD_SWAP_MODE, 1);
#endif
bnx2x_set_endianity(bp);
bnx2x_ilt_init_page_size(bp, INITOP_SET);
if (CHIP_REV_IS_FPGA(bp) && CHIP_IS_E1H(bp))
@ -13169,9 +13184,15 @@ static void __bnx2x_remove(struct pci_dev *pdev,
bnx2x_iov_remove_one(bp);
/* Power on: we can't let PCI layer write to us while we are in D3 */
if (IS_PF(bp))
if (IS_PF(bp)) {
bnx2x_set_power_state(bp, PCI_D0);
/* Set endianity registers to reset values in case next driver
* boots in different endianty environment.
*/
bnx2x_reset_endianity(bp);
}
/* Disable MSI/MSI-X */
bnx2x_disable_msi(bp);