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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Subject: [PATCH net v3 3/3] octeon_ep_vf: ensure dbell BADDR updation Date: Wed, 7 Jan 2026 13:18:56 +0000 Message-ID: <20260107131857.3434352-4-vimleshk@marvell.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260107131857.3434352-1-vimleshk@marvell.com> References: <20260107131857.3434352-1-vimleshk@marvell.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Authority-Analysis: v=2.4 cv=PLgCOPqC c=1 sm=1 tr=0 ts=695e5d56 cx=c_pps a=rEv8fa4AjpPjGxpoe8rlIQ==:117 a=rEv8fa4AjpPjGxpoe8rlIQ==:17 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=M5GUcnROAAAA:8 a=9s7rcsES4n5jIWhP9eIA:9 a=OBjm3rFKGHvpk9ecZwUJ:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTA3MDEwMiBTYWx0ZWRfX1RRc3EyiXZCj 4wyhtuPJ93ny+jfRKsMu+4gfqfOXLSIEoFVKWxUeLjFjcZ8+J52KdX0JrsImM8rKnuGJmHiQEbh zLPshSiPyzIUWidKM/AhzblbCGlToXxvy7dBygh/Bn2UzcwgPwzMMnNLnTBT+eodCR8Ms3ae7eQ GrCTrDju2a6sufiWrOJRBFE+xFOvnIIi9d3NcegoaWO/Snr3hLMBb51M2c5UdmQvK+4cz9hVD3X LHqYOCslbCt5/vRXljUbsVSxjztIjUV4xB/MMONDvI1dInkwz9W6M/yGEjqWE9YMchKuUqvrWnF XxA4+fXMIby45rMYvSFfYGMmAzge5SKGmvCGcO+/5VKD83OBD2OejTDeDnhOq/C28gktMAAT4Pf 0Dah08c9XVYrcgrgDj/xMIJr5H1liPY53RgVsj7Sw8L6SHbAQSc4NOoz8kql8npQ7uBaWNfqMAv oGRXhXss89hZMHchBow== X-Proofpoint-GUID: Mg6Uzxfj6zxL_9a35aaU4KMeI3aZbU6S X-Proofpoint-ORIG-GUID: Mg6Uzxfj6zxL_9a35aaU4KMeI3aZbU6S X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2026-01-07_01,2026-01-06_01,2025-10-01_01 Content-Type: text/plain; charset="utf-8" Make sure the OUT DBELL base address reflects the latest values written to it. Fix: Add a wait until the OUT DBELL base address register is updated with the DMA ring descriptor address, and modify the setup_oq function to properly handle failures. Fixes: 2c0c32c72be29 ("octeon_ep_vf: add hardware configuration APIs") Signed-off-by: Sathesh Edara Signed-off-by: Shinas Rasheed Signed-off-by: Vimlesh Kumar --- V3: - Use reverse christmas tree order variable declaration. - Return error if timeout happens during setup oq. V2: https://lore.kernel.org/all/20251219100751.3063135-4-vimleshk@marvell.c= om/ V1: https://lore.kernel.org/all/20251212122304.2562229-4-vimleshk@marvell.c= om/ .../marvell/octeon_ep_vf/octep_vf_cn9k.c | 3 +- .../marvell/octeon_ep_vf/octep_vf_cnxk.c | 39 +++++++++++++++++-- .../marvell/octeon_ep_vf/octep_vf_main.h | 2 +- .../marvell/octeon_ep_vf/octep_vf_rx.c | 4 +- 4 files changed, 42 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cn9k.c b/dr= ivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cn9k.c index 88937fce75f1..4c769b27c278 100644 --- a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cn9k.c +++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cn9k.c @@ -196,7 +196,7 @@ static void octep_vf_setup_iq_regs_cn93(struct octep_vf= _device *oct, int iq_no) } =20 /* Setup registers for a hardware Rx Queue */ -static void octep_vf_setup_oq_regs_cn93(struct octep_vf_device *oct, int o= q_no) +static int octep_vf_setup_oq_regs_cn93(struct octep_vf_device *oct, int oq= _no) { struct octep_vf_oq *oq =3D oct->oq[oq_no]; u32 time_threshold =3D 0; @@ -239,6 +239,7 @@ static void octep_vf_setup_oq_regs_cn93(struct octep_vf= _device *oct, int oq_no) time_threshold =3D CFG_GET_OQ_INTR_TIME(oct->conf); reg_val =3D ((u64)time_threshold << 32) | CFG_GET_OQ_INTR_PKT(oct->conf); octep_vf_write_csr64(oct, CN93_VF_SDP_R_OUT_INT_LEVELS(oq_no), reg_val); + return 0; } =20 /* Setup registers for a VF mailbox */ diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cnxk.c b/dr= ivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cnxk.c index 1f79dfad42c6..a968b93a6794 100644 --- a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cnxk.c +++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_cnxk.c @@ -199,11 +199,13 @@ static void octep_vf_setup_iq_regs_cnxk(struct octep_= vf_device *oct, int iq_no) } =20 /* Setup registers for a hardware Rx Queue */ -static void octep_vf_setup_oq_regs_cnxk(struct octep_vf_device *oct, int o= q_no) +static int octep_vf_setup_oq_regs_cnxk(struct octep_vf_device *oct, int oq= _no) { struct octep_vf_oq *oq =3D oct->oq[oq_no]; + unsigned long t_out_jiffies; u32 time_threshold =3D 0; u64 oq_ctl =3D ULL(0); + u64 reg_ba_val; u64 reg_val; =20 reg_val =3D octep_vf_read_csr64(oct, CNXK_VF_SDP_R_OUT_CONTROL(oq_no)); @@ -214,6 +216,38 @@ static void octep_vf_setup_oq_regs_cnxk(struct octep_v= f_device *oct, int oq_no) reg_val =3D octep_vf_read_csr64(oct, CNXK_VF_SDP_R_OUT_CONTROL(oq_no)); } while (!(reg_val & CNXK_VF_R_OUT_CTL_IDLE)); } + octep_vf_write_csr64(oct, CNXK_VF_SDP_R_OUT_WMARK(oq_no), + oq->max_count); + /* Wait for WMARK to get applied */ + usleep_range(10, 15); + + octep_vf_write_csr64(oct, CNXK_VF_SDP_R_OUT_SLIST_BADDR(oq_no), + oq->desc_ring_dma); + octep_vf_write_csr64(oct, CNXK_VF_SDP_R_OUT_SLIST_RSIZE(oq_no), + oq->max_count); + reg_ba_val =3D octep_vf_read_csr64(oct, + CNXK_VF_SDP_R_OUT_SLIST_BADDR(oq_no)); + if (reg_ba_val !=3D oq->desc_ring_dma) { + t_out_jiffies =3D jiffies + 10 * HZ; + do { + if (reg_ba_val =3D=3D ULLONG_MAX) + return -EFAULT; + octep_vf_write_csr64(oct, + CNXK_VF_SDP_R_OUT_SLIST_BADDR + (oq_no), oq->desc_ring_dma); + octep_vf_write_csr64(oct, + CNXK_VF_SDP_R_OUT_SLIST_RSIZE + (oq_no), oq->max_count); + reg_ba_val =3D + octep_vf_read_csr64(oct, + CNXK_VF_SDP_R_OUT_SLIST_BADDR + (oq_no)); + } while ((reg_ba_val !=3D oq->desc_ring_dma) && + time_before(jiffies, t_out_jiffies)); + + if (reg_ba_val !=3D oq->desc_ring_dma) + return -EAGAIN; + } =20 reg_val &=3D ~(CNXK_VF_R_OUT_CTL_IMODE); reg_val &=3D ~(CNXK_VF_R_OUT_CTL_ROR_P); @@ -227,8 +261,6 @@ static void octep_vf_setup_oq_regs_cnxk(struct octep_vf= _device *oct, int oq_no) reg_val |=3D (CNXK_VF_R_OUT_CTL_ES_P); =20 octep_vf_write_csr64(oct, CNXK_VF_SDP_R_OUT_CONTROL(oq_no), reg_val); - octep_vf_write_csr64(oct, CNXK_VF_SDP_R_OUT_SLIST_BADDR(oq_no), oq->desc_= ring_dma); - octep_vf_write_csr64(oct, CNXK_VF_SDP_R_OUT_SLIST_RSIZE(oq_no), oq->max_c= ount); =20 oq_ctl =3D octep_vf_read_csr64(oct, CNXK_VF_SDP_R_OUT_CONTROL(oq_no)); /* Clear the ISIZE and BSIZE (22-0) */ @@ -250,6 +282,7 @@ static void octep_vf_setup_oq_regs_cnxk(struct octep_vf= _device *oct, int oq_no) reg_val &=3D ~GENMASK_ULL(31, 0); reg_val |=3D CFG_GET_OQ_WMARK(oct->conf); octep_vf_write_csr64(oct, CNXK_VF_SDP_R_OUT_WMARK(oq_no), reg_val); + return 0; } =20 /* Setup registers for a VF mailbox */ diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.h b/dr= ivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.h index b9f13506f462..c74cd2369e90 100644 --- a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.h +++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.h @@ -55,7 +55,7 @@ struct octep_vf_mmio { =20 struct octep_vf_hw_ops { void (*setup_iq_regs)(struct octep_vf_device *oct, int q); - void (*setup_oq_regs)(struct octep_vf_device *oct, int q); + int (*setup_oq_regs)(struct octep_vf_device *oct, int q); void (*setup_mbox_regs)(struct octep_vf_device *oct, int mbox); =20 irqreturn_t (*non_ioq_intr_handler)(void *ioq_vector); diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.c b/driv= ers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.c index d70c8be3cfc4..6446f6bf0b90 100644 --- a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.c +++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_rx.c @@ -171,7 +171,9 @@ static int octep_vf_setup_oq(struct octep_vf_device *oc= t, int q_no) goto oq_fill_buff_err; =20 octep_vf_oq_reset_indices(oq); - oct->hw_ops.setup_oq_regs(oct, q_no); + if (oct->hw_ops.setup_oq_regs(oct, q_no)) + goto oq_fill_buff_err; + oct->num_oqs++; =20 return 0; --=20 2.47.0