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PCI: tegra: Add stop edma support

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Add support for tegra_pcie_edma_stop to stop EDMA engine and abort
any queued transfers. Once EDMA is stopped, any new transfer submits
will fail.

Bug 3626323
Bug 3868928

Change-Id: Id0e0a662f366e7b2b4d82465a9424037636ffd9c
Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2708631
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2815924
Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Nagarjuna Kristam
2022-05-06 13:24:53 +05:30
committed by mobile promotions
parent 59a116a6f8
commit 0c594b0c0b
1 changed files with 7 additions and 0 deletions
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7
include/linux/tegra-pcie-edma.h
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@@ -151,6 +151,13 @@ void *tegra_pcie_edma_initialize(struct tegra_pcie_edma_init_info *info);
edma_xfer_status_t tegra_pcie_edma_submit_xfer(void *cookie,
struct tegra_pcie_edma_xfer_info *tx_info);
/**
* @brief: API to stop EDMA engine,.
* @param[in] cookie : cookie data returned in tegra_pcie_edma_initialize() call.
* @retVal: Returns true on success and false on failure.
*/
bool tegra_pcie_edma_stop(void *cookie);
/**
* @brief: API to perform de-init of EDMA library.
* @param[in] cookie : cookie data returned in tegra_pcie_edma_initialize() call.