[PATCH 08/12] coco: host: arm64: Instantiate RMM pdev during device connect

Aneesh Kumar K.V (Arm)
2025-10-27T09:50:46Z

An RMM pdev object represents a communication channel between the RMM
and a physical device, for example a PCIe device. With the required
helpers now in place, update the connect callback to create an RMM pdev
object.

Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
---
drivers/virt/coco/arm-cca-host/arm-cca.c | 23 +++++++++++++++++++++--
1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/virt/coco/arm-cca-host/arm-cca.c b/drivers/virt/coco/arm-cca-host/arm-cca.c
index e79f05fee516..8eaf8749e59d 100644
--- a/drivers/virt/coco/arm-cca-host/arm-cca.c
+++ b/drivers/virt/coco/arm-cca-host/arm-cca.c
@@ -71,8 +71,8 @@ static void cca_tsm_pci_remove(struct pci_tsm *tsm)
}
}

-static __maybe_unused int init_dev_communication_buffers(struct pci_dev *pdev,
- struct cca_host_comm_data *comm_data)
+static int init_dev_communication_buffers(struct pci_dev *pdev,
+ struct cca_host_comm_data *comm_data)
{
int ret = -ENOMEM;

@@ -160,6 +160,16 @@ static int cca_tsm_connect(struct pci_dev *pdev)
if (rc)
goto err_tsm;

+ rc = init_dev_communication_buffers(pdev, &pf0_dsc->comm_data);
+ if (rc)
+ goto err_comm_buff;
+ rc = pdev_create(pdev);
+ if (rc)
+ goto err_pdev_create;
+
+ rc = pdev_ide_setup(pdev);
+ if (rc)
+ goto err_ide_setup;
/*
* Once ide is setup, enable the stream at the endpoint
* Root port will be done by RMM
@@ -167,6 +177,12 @@ static int cca_tsm_connect(struct pci_dev *pdev)
pci_ide_stream_enable(pdev, ide);
return 0;

+err_ide_setup:
+ pdev_stop_and_destroy(pdev);
+err_pdev_create:
+ free_dev_communication_buffers(&pf0_dsc->comm_data);
+err_comm_buff:
+ tsm_ide_stream_unregister(ide);
err_tsm:
pci_ide_stream_teardown(rp, ide);
pci_ide_stream_teardown(pdev, ide);
@@ -193,6 +209,9 @@ static void cca_tsm_disconnect(struct pci_dev *pdev)
stream_id = ide->stream_id;
pf0_dsc->sel_stream = NULL;

+ pdev_stop_and_destroy(pdev);
+ free_dev_communication_buffers(&pf0_dsc->comm_data);
+
pci_ide_stream_release(ide);
clear_bit(stream_id, cca_stream_ids);
}
--
2.43.0