From: Rahul Lakkireddy rahul.lakkireddy@chelsio.com
[ Upstream commit 1bfb3dea965ff9f6226fd1709338f227363b6061 ]
Accessing SGE_QBASE_MAP[0-3] and SGE_QBASE_INDEX registers can lead to SGE missing doorbells under heavy traffic. So, only collect them when adapter is idle. Also update the regdump range to skip collecting these registers.
Fixes: 80a95a80d358 ("cxgb4: collect SGE PF/VF queue map") Signed-off-by: Rahul Lakkireddy rahul.lakkireddy@chelsio.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- .../net/ethernet/chelsio/cxgb4/cudbg_lib.c | 23 +++++++++++++++---- drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 3 ++- 2 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c index 75474f810249..c5b0e725b238 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c @@ -1794,11 +1794,25 @@ int cudbg_collect_sge_indirect(struct cudbg_init *pdbg_init, struct cudbg_buffer temp_buff = { 0 }; struct sge_qbase_reg_field *sge_qbase; struct ireg_buf *ch_sge_dbg; + u8 padap_running = 0; int i, rc; + u32 size;
- rc = cudbg_get_buff(pdbg_init, dbg_buff, - sizeof(*ch_sge_dbg) * 2 + sizeof(*sge_qbase), - &temp_buff); + /* Accessing SGE_QBASE_MAP[0-3] and SGE_QBASE_INDEX regs can + * lead to SGE missing doorbells under heavy traffic. So, only + * collect them when adapter is idle. + */ + for_each_port(padap, i) { + padap_running = netif_running(padap->port[i]); + if (padap_running) + break; + } + + size = sizeof(*ch_sge_dbg) * 2; + if (!padap_running) + size += sizeof(*sge_qbase); + + rc = cudbg_get_buff(pdbg_init, dbg_buff, size, &temp_buff); if (rc) return rc;
@@ -1820,7 +1834,8 @@ int cudbg_collect_sge_indirect(struct cudbg_init *pdbg_init, ch_sge_dbg++; }
- if (CHELSIO_CHIP_VERSION(padap->params.chip) > CHELSIO_T5) { + if (CHELSIO_CHIP_VERSION(padap->params.chip) > CHELSIO_T5 && + !padap_running) { sge_qbase = (struct sge_qbase_reg_field *)ch_sge_dbg; /* 1 addr reg SGE_QBASE_INDEX and 4 data reg * SGE_QBASE_MAP[0-3] diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c index 98d01a7497ec..581670dced6e 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c @@ -2090,7 +2090,8 @@ void t4_get_regs(struct adapter *adap, void *buf, size_t buf_size) 0x1190, 0x1194, 0x11a0, 0x11a4, 0x11b0, 0x11b4, - 0x11fc, 0x1274, + 0x11fc, 0x123c, + 0x1254, 0x1274, 0x1280, 0x133c, 0x1800, 0x18fc, 0x3000, 0x302c,