Add support to reset firmware ready status when the driver is removed(either in unload or unbind) Signed-off-by: Sathesh Edara Signed-off-by: Shinas Rasheed Signed-off-by: Vimlesh Kumar --- V2: Use recommended bit manipulation macros. V1: https://lore.kernel.org/all/20251120112345.649021-2-vimleshk@marvell.com/ .../marvell/octeon_ep/octep_cn9k_pf.c | 22 +++++++++++++++++++ .../marvell/octeon_ep/octep_cnxk_pf.c | 2 +- .../marvell/octeon_ep/octep_regs_cn9k_pf.h | 16 ++++++++++++++ .../marvell/octeon_ep/octep_regs_cnxk_pf.h | 1 + 4 files changed, 40 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c b/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c index b5805969404f..6f926e82c17c 100644 --- a/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c @@ -637,6 +637,17 @@ static int octep_soft_reset_cn93_pf(struct octep_device *oct) octep_write_csr64(oct, CN93_SDP_WIN_WR_MASK_REG, 0xFF); + /* Firmware status CSR is supposed to be cleared by + * core domain reset, but due to a hw bug, it is not. + * Set it to RUNNING right before reset so that it is not + * left in READY (1) state after a reset. This is required + * in addition to the early setting to handle the case where + * the OcteonTX is unexpectedly reset, reboots, and then + * the module is removed. + */ + OCTEP_PCI_WIN_WRITE(oct, CN9K_PEMX_PFX_CSX_PFCFGX(0, 0, CN9K_PCIEEP_VSECST_CTL), + FW_STATUS_DOWNING); + /* Set core domain reset bit */ OCTEP_PCI_WIN_WRITE(oct, CN93_RST_CORE_DOMAIN_W1S, 1); /* Wait for 100ms as Octeon resets. */ @@ -894,4 +905,15 @@ void octep_device_setup_cn93_pf(struct octep_device *oct) octep_init_config_cn93_pf(oct); octep_configure_ring_mapping_cn93_pf(oct); + + if (oct->chip_id == OCTEP_PCI_DEVICE_ID_CN98_PF) + return; + + /* Firmware status CSR is supposed to be cleared by + * core domain reset, but due to IPBUPEM-38842, it is not. + * Set it to RUNNING early in boot, so that unexpected resets + * leave it in a state that is not READY (1). + */ + OCTEP_PCI_WIN_WRITE(oct, CN9K_PEMX_PFX_CSX_PFCFGX(0, 0, CN9K_PCIEEP_VSECST_CTL), + FW_STATUS_RUNNING); } diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_cnxk_pf.c b/drivers/net/ethernet/marvell/octeon_ep/octep_cnxk_pf.c index 5de0b5ecbc5f..e07264b3dbf8 100644 --- a/drivers/net/ethernet/marvell/octeon_ep/octep_cnxk_pf.c +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_cnxk_pf.c @@ -660,7 +660,7 @@ static int octep_soft_reset_cnxk_pf(struct octep_device *oct) * the module is removed. */ OCTEP_PCI_WIN_WRITE(oct, CNXK_PEMX_PFX_CSX_PFCFGX(0, 0, CNXK_PCIEEP_VSECST_CTL), - FW_STATUS_RUNNING); + FW_STATUS_DOWNING); /* Set chip domain reset bit */ OCTEP_PCI_WIN_WRITE(oct, CNXK_RST_CHIP_DOMAIN_W1S, 1); diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_regs_cn9k_pf.h b/drivers/net/ethernet/marvell/octeon_ep/octep_regs_cn9k_pf.h index ca473502d7a0..284959d97ad1 100644 --- a/drivers/net/ethernet/marvell/octeon_ep/octep_regs_cn9k_pf.h +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_regs_cn9k_pf.h @@ -383,6 +383,22 @@ /* bit 1 for firmware heartbeat interrupt */ #define CN93_SDP_EPF_OEI_RINT_DATA_BIT_HBEAT BIT_ULL(1) +#define FW_STATUS_DOWNING 0ULL +#define FW_STATUS_RUNNING 2ULL + +#define CN9K_PEM_GENMASK BIT_ULL(36) +#define CN9K_PF_GENMASK GENMASK_ULL(21, 18) +#define PFX_CSX_PFCFGX_SHADOW_BIT BIT_ULL(16) +#define CN9K_PEMX_PFX_CSX_PFCFGX(pem, pf, offset) ((0x8e0000008000 | (uint64_t)\ + FIELD_PREP(CN9K_PEM_GENMASK, pem)\ + | FIELD_PREP(CN9K_PF_GENMASK, pf)\ + | (PFX_CSX_PFCFGX_SHADOW_BIT & (offset))\ + | (rounddown((offset), 8)))\ + + ((offset) & BIT_ULL(2))) + +/* Register defines for use with CN9K_PEMX_PFX_CSX_PFCFGX */ +#define CN9K_PCIEEP_VSECST_CTL 0x4D0 + #define CN93_PEM_BAR4_INDEX 7 #define CN93_PEM_BAR4_INDEX_SIZE 0x400000ULL #define CN93_PEM_BAR4_INDEX_OFFSET (CN93_PEM_BAR4_INDEX * CN93_PEM_BAR4_INDEX_SIZE) diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_regs_cnxk_pf.h b/drivers/net/ethernet/marvell/octeon_ep/octep_regs_cnxk_pf.h index e637d7c8224d..a6b6c9f356de 100644 --- a/drivers/net/ethernet/marvell/octeon_ep/octep_regs_cnxk_pf.h +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_regs_cnxk_pf.h @@ -396,6 +396,7 @@ #define CNXK_SDP_EPF_OEI_RINT_DATA_BIT_MBOX BIT_ULL(0) /* bit 1 for firmware heartbeat interrupt */ #define CNXK_SDP_EPF_OEI_RINT_DATA_BIT_HBEAT BIT_ULL(1) +#define FW_STATUS_DOWNING 0ULL #define FW_STATUS_RUNNING 2ULL #define CNXK_PEMX_PFX_CSX_PFCFGX(pem, pf, offset) ({ typeof(offset) _off = (offset); \ ((0x8e0000008000 | \ -- 2.47.0