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From: Shijith Thotton <shijith.thotton@caviumnetworks.com>
To: ferruh.yigit@intel.com
Cc: dev@dpdk.org, Jerin Jacob <jerin.jacob@caviumnetworks.com>,
Derek Chickles <derek.chickles@caviumnetworks.com>,
Venkat Koppula <venkat.koppula@caviumnetworks.com>,
Srisivasubramanian S <ssrinivasan@caviumnetworks.com>,
Mallesham Jatharakonda <mjatharakonda@oneconvergence.com>
Date: Thu, 2 Mar 2017 17:02:12 +0530
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Subject: [dpdk-dev] [PATCH v2 07/46] net/liquidio: add API to disable IO
queues
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Signed-off-by: Shijith Thotton <shijith.thotton@caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Venkat Koppula <venkat.koppula@caviumnetworks.com>
Signed-off-by: Srisivasubramanian S <ssrinivasan@caviumnetworks.com>
Signed-off-by: Mallesham Jatharakonda <mjatharakonda@oneconvergence.com>
---
drivers/net/liquidio/base/lio_23xx_vf.c | 49 +++++++++++++++++++++++++++++++++
drivers/net/liquidio/base/lio_23xx_vf.h | 7 +++++
drivers/net/liquidio/lio_ethdev.c | 5 ++++
3 files changed, 61 insertions(+)
diff --git a/drivers/net/liquidio/base/lio_23xx_vf.c b/drivers/net/liquidio/base/lio_23xx_vf.c
index dd5e3a6..d9b9e2a 100644
--- a/drivers/net/liquidio/base/lio_23xx_vf.c
+++ b/drivers/net/liquidio/base/lio_23xx_vf.c
@@ -65,3 +65,52 @@
return 0;
}
+
+int
+cn23xx_vf_set_io_queues_off(struct lio_device *lio_dev)
+{
+ uint32_t loop = CN23XX_VF_BUSY_READING_REG_LOOP_COUNT;
+ uint64_t q_no;
+
+ /* Disable the i/p and o/p queues for this Octeon.
+ * IOQs will already be in reset.
+ * If RST bit is set, wait for Quiet bit to be set
+ * Once Quiet bit is set, clear the RST bit
+ */
+ PMD_INIT_FUNC_TRACE();
+
+ for (q_no = 0; q_no < lio_dev->sriov_info.rings_per_vf; q_no++) {
+ volatile uint64_t reg_val;
+
+ reg_val = lio_read_csr64(lio_dev,
+ CN23XX_SLI_IQ_PKT_CONTROL64(q_no));
+ while ((reg_val & CN23XX_PKT_INPUT_CTL_RST) && !(reg_val &
+ CN23XX_PKT_INPUT_CTL_QUIET) && loop) {
+ reg_val = lio_read_csr64(
+ lio_dev,
+ CN23XX_SLI_IQ_PKT_CONTROL64(q_no));
+ loop = loop - 1;
+ }
+
+ if (loop == 0) {
+ lio_dev_err(lio_dev,
+ "clearing the reset reg failed or setting the quiet reg failed for qno %lu\n",
+ (unsigned long)q_no);
+ return -1;
+ }
+
+ reg_val = reg_val & ~CN23XX_PKT_INPUT_CTL_RST;
+ lio_write_csr64(lio_dev, CN23XX_SLI_IQ_PKT_CONTROL64(q_no),
+ reg_val);
+
+ reg_val = lio_read_csr64(lio_dev,
+ CN23XX_SLI_IQ_PKT_CONTROL64(q_no));
+ if (reg_val & CN23XX_PKT_INPUT_CTL_RST) {
+ lio_dev_err(lio_dev, "unable to reset qno %lu\n",
+ (unsigned long)q_no);
+ return -1;
+ }
+ }
+
+ return 0;
+}
diff --git a/drivers/net/liquidio/base/lio_23xx_vf.h b/drivers/net/liquidio/base/lio_23xx_vf.h
index 1c234bf..1af09d0 100644
--- a/drivers/net/liquidio/base/lio_23xx_vf.h
+++ b/drivers/net/liquidio/base/lio_23xx_vf.h
@@ -80,5 +80,12 @@
return default_lio_conf;
}
+/** Turns off the input and output queues for the device
+ * @param lio_dev which device io queues to disable
+ */
+int cn23xx_vf_set_io_queues_off(struct lio_device *lio_dev);
+
+#define CN23XX_VF_BUSY_READING_REG_LOOP_COUNT 100000
+
int cn23xx_vf_setup_device(struct lio_device *lio_dev);
#endif /* _LIO_23XX_VF_H_ */
diff --git a/drivers/net/liquidio/lio_ethdev.c b/drivers/net/liquidio/lio_ethdev.c
index 734f6c4..0487f3d 100644
--- a/drivers/net/liquidio/lio_ethdev.c
+++ b/drivers/net/liquidio/lio_ethdev.c
@@ -86,6 +86,11 @@
return -1;
}
+ if (cn23xx_vf_set_io_queues_off(lio_dev)) {
+ lio_dev_err(lio_dev, "Setting io queues off failed\n");
+ return -1;
+ }
+
dpdk_queues = (int)lio_dev->sriov_info.rings_per_vf;
lio_dev->max_tx_queues = dpdk_queues;
--
1.8.3.1