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From: Kevin Laatz <kevin.laatz@intel.com>
To: dev@dpdk.org
Cc: thomas@monjalon.net, bruce.richardson@intel.com, fengchengwen@huawei.com,
jerinj@marvell.com, conor.walsh@intel.com,
Kevin Laatz <kevin.laatz@intel.com>
Date: Tue, 19 Oct 2021 11:25:36 +0000
Message-Id: <20211019112540.1825132-13-kevin.laatz@intel.com>
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Subject: [dpdk-dev] [PATCH v9 12/16] dma/idxd: add vchan status function
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When testing dmadev drivers, it is useful to have the HW device in a known
state. This patch adds the implementation of the function which will wait
for the device to be idle (all jobs completed) before proceeding.
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Reviewed-by: Conor Walsh <conor.walsh@intel.com>
---
drivers/dma/idxd/idxd_bus.c | 1 +
drivers/dma/idxd/idxd_common.c | 17 +++++++++++++++++
drivers/dma/idxd/idxd_internal.h | 2 ++
drivers/dma/idxd/idxd_pci.c | 1 +
4 files changed, 21 insertions(+)
diff --git a/drivers/dma/idxd/idxd_bus.c b/drivers/dma/idxd/idxd_bus.c
index b52ea02854..e6caa048a9 100644
--- a/drivers/dma/idxd/idxd_bus.c
+++ b/drivers/dma/idxd/idxd_bus.c
@@ -101,6 +101,7 @@ static const struct rte_dma_dev_ops idxd_bus_ops = {
.dev_info_get = idxd_info_get,
.stats_get = idxd_stats_get,
.stats_reset = idxd_stats_reset,
+ .vchan_status = idxd_vchan_status,
};
static void *
diff --git a/drivers/dma/idxd/idxd_common.c b/drivers/dma/idxd/idxd_common.c
index fd81418b7c..3c8cff15c0 100644
--- a/drivers/dma/idxd/idxd_common.c
+++ b/drivers/dma/idxd/idxd_common.c
@@ -163,6 +163,23 @@ get_comp_status(struct idxd_completion *c)
}
}
+int
+idxd_vchan_status(const struct rte_dma_dev *dev, uint16_t vchan __rte_unused,
+ enum rte_dma_vchan_status *status)
+{
+ struct idxd_dmadev *idxd = dev->fp_obj->dev_private;
+ uint16_t last_batch_write = idxd->batch_idx_write == 0 ? idxd->max_batches :
+ idxd->batch_idx_write - 1;
+ uint8_t bstatus = (idxd->batch_comp_ring[last_batch_write].status != 0);
+
+ /* An IDXD device will always be either active or idle.
+ * RTE_DMA_VCHAN_HALTED_ERROR is therefore not supported by IDXD.
+ */
+ *status = bstatus ? RTE_DMA_VCHAN_IDLE : RTE_DMA_VCHAN_ACTIVE;
+
+ return 0;
+}
+
static __rte_always_inline int
batch_ok(struct idxd_dmadev *idxd, uint16_t max_ops, enum rte_dma_status_code *status)
{
diff --git a/drivers/dma/idxd/idxd_internal.h b/drivers/dma/idxd/idxd_internal.h
index a85a1fb79e..50acb82d3d 100644
--- a/drivers/dma/idxd/idxd_internal.h
+++ b/drivers/dma/idxd/idxd_internal.h
@@ -102,5 +102,7 @@ uint16_t idxd_completed_status(void *dev_private, uint16_t qid __rte_unused,
int idxd_stats_get(const struct rte_dma_dev *dev, uint16_t vchan,
struct rte_dma_stats *stats, uint32_t stats_sz);
int idxd_stats_reset(struct rte_dma_dev *dev, uint16_t vchan);
+int idxd_vchan_status(const struct rte_dma_dev *dev, uint16_t vchan,
+ enum rte_dma_vchan_status *status);
#endif /* _IDXD_INTERNAL_H_ */
diff --git a/drivers/dma/idxd/idxd_pci.c b/drivers/dma/idxd/idxd_pci.c
index 9d7f0531d5..23c10c0fb0 100644
--- a/drivers/dma/idxd/idxd_pci.c
+++ b/drivers/dma/idxd/idxd_pci.c
@@ -140,6 +140,7 @@ static const struct rte_dma_dev_ops idxd_pci_ops = {
.stats_reset = idxd_stats_reset,
.dev_start = idxd_pci_dev_start,
.dev_stop = idxd_pci_dev_stop,
+ .vchan_status = idxd_vchan_status,
};
/* each portal uses 4 x 4k pages */
--
2.30.2