diff options
| author | Rick Farrington <ricardo.farrington@cavium.com> | 2018-07-13 22:50:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-26 09:38:10 +0300 |
| commit | 7ec40f0ab2582b91f1e943544e06e80f016871d2 (patch) | |
| tree | 148dc7ac181f5dadae3b73c9196478cda2f5b92b /drivers/net/ethernet/cavium | |
| parent | 6c4abbeb250948f916dce05e972861b263531008 (diff) | |
| download | linux-7ec40f0ab2582b91f1e943544e06e80f016871d2.tar.xz | |
liquidio: fix hang when re-binding VF host drv after running DPDK VF driver
[ Upstream commit ac13d6d8eaded15c67265eafc32f439ea3a0ac4a ]
When configuring SLI_PKTn_OUTPUT_CONTROL, VF driver was assuming that IPTR
mode was disabled by reset, which was not true. Since DPDK driver had
set IPTR mode previously, the VF driver (which uses buf-ptr-only mode) was
not properly handling DROQ packets (i.e. it saw zero-length packets).
This represented an invalid hardware configuration which the driver could
not handle.
Signed-off-by: Rick Farrington <ricardo.farrington@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/ethernet/cavium')
| -rw-r--r-- | drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c b/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c index e8b290473ee2..2e089b5ff8f3 100644 --- a/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c +++ b/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c @@ -493,6 +493,9 @@ static void cn23xx_pf_setup_global_output_regs(struct octeon_device *oct) for (q_no = srn; q_no < ern; q_no++) { reg_val = octeon_read_csr(oct, CN23XX_SLI_OQ_PKT_CONTROL(q_no)); + /* clear IPTR */ + reg_val &= ~CN23XX_PKT_OUTPUT_CTL_IPTR; + /* set DPTR */ reg_val |= CN23XX_PKT_OUTPUT_CTL_DPTR; diff --git a/drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c b/drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c index 9338a0008378..1f8b7f651254 100644 --- a/drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c +++ b/drivers/net/ethernet/cavium/liquidio/cn23xx_vf_device.c @@ -165,6 +165,9 @@ static void cn23xx_vf_setup_global_output_regs(struct octeon_device *oct) reg_val = octeon_read_csr(oct, CN23XX_VF_SLI_OQ_PKT_CONTROL(q_no)); + /* clear IPTR */ + reg_val &= ~CN23XX_PKT_OUTPUT_CTL_IPTR; + /* set DPTR */ reg_val |= CN23XX_PKT_OUTPUT_CTL_DPTR; |