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From: Conor Walsh <conor.walsh@intel.com>
To: bruce.richardson@intel.com, fengchengwen@huawei.com, jerinj@marvell.com,
kevin.laatz@intel.com
Cc: dev@dpdk.org,
Conor Walsh <conor.walsh@intel.com>
Date: Fri, 17 Sep 2021 15:42:25 +0000
Message-Id: <20210917154227.737554-10-conor.walsh@intel.com>
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<20210917154227.737554-1-conor.walsh@intel.com>
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Subject: [dpdk-dev] [PATCH v4 09/11] dma/ioat: add support for vchan status
function
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Add support for the rte_dmadev_vchan_status API call.
Signed-off-by: Conor Walsh <conor.walsh@intel.com>
Reviewed-by: Kevin Laatz <kevin.laatz@intel.com>
---
drivers/dma/ioat/ioat_dmadev.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/dma/ioat/ioat_dmadev.c b/drivers/dma/ioat/ioat_dmadev.c
index f596637da4..b93289516e 100644
--- a/drivers/dma/ioat/ioat_dmadev.c
+++ b/drivers/dma/ioat/ioat_dmadev.c
@@ -519,6 +519,26 @@ ioat_stats_reset(struct rte_dma_dev *dev, uint16_t vchan __rte_unused)
return 0;
}
+/* Check if the IOAT device is idle. */
+static int
+ioat_vchan_status(const struct rte_dma_dev *dev, uint16_t vchan __rte_unused,
+ enum rte_dma_vchan_status *status)
+{
+ int state = 0;
+ const struct ioat_dmadev *ioat = dev->dev_private;
+ const uint16_t mask = ioat->qcfg.nb_desc - 1;
+ const uint16_t last = __get_last_completed(ioat, &state);
+
+ if (state == IOAT_CHANSTS_HALTED || state == IOAT_CHANSTS_SUSPENDED)
+ *status = RTE_DMA_VCHAN_HALTED_ERROR;
+ else if (last == ((ioat->next_write - 1) & mask))
+ *status = RTE_DMA_VCHAN_IDLE;
+ else
+ *status = RTE_DMA_VCHAN_ACTIVE;
+
+ return 0;
+}
+
/* Create a DMA device. */
static int
ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
@@ -532,6 +552,7 @@ ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
.dev_stop = ioat_dev_stop,
.stats_get = ioat_stats_get,
.stats_reset = ioat_stats_reset,
+ .vchan_status = ioat_vchan_status,
.vchan_setup = ioat_vchan_setup,
};
--
2.25.1