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[v4,06/10] PCI: endpoint: pci-epf-{mhi/test}: Move DMA initialization to EPC init callback

Message ID 20240430-pci-epf-rework-v4-6-22832d0d456f@linaro.org
State New
Headers show
Series PCI: endpoint: Make host reboot handling more robust | expand

Commit Message

Manivannan Sadhasivam April 30, 2024, 6:13 a.m. UTC 
To maintain uniformity across EPF drivers, let's move the DMA
initialization to EPC init callback. This will also allow us to deinit DMA
during PERST# assert in the further commits.

For EPC drivers without PERST#, DMA deinit will only happen during driver
unbind.

Reviewed-by: Niklas Cassel <cassel@kernel.org>
Tested-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/endpoint/functions/pci-epf-mhi.c  | 16 ++++++++--------
 drivers/pci/endpoint/functions/pci-epf-test.c | 12 ++++++------
 2 files changed, 14 insertions(+), 14 deletions(-)
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Patch

diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c
index b662905e2532..205c02953f25 100644
--- a/drivers/pci/endpoint/functions/pci-epf-mhi.c
+++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c
@@ -753,6 +753,14 @@  static int pci_epf_mhi_epc_init(struct pci_epf *epf)
 	if (!epf_mhi->epc_features)
 		return -ENODATA;
 
+	if (info->flags & MHI_EPF_USE_DMA) {
+		ret = pci_epf_mhi_dma_init(epf_mhi);
+		if (ret) {
+			dev_err(dev, "Failed to initialize DMA: %d\n", ret);
+			return ret;
+		}
+	}
+
 	return 0;
 }
 
@@ -765,14 +773,6 @@  static int pci_epf_mhi_link_up(struct pci_epf *epf)
 	struct device *dev = &epf->dev;
 	int ret;
 
-	if (info->flags & MHI_EPF_USE_DMA) {
-		ret = pci_epf_mhi_dma_init(epf_mhi);
-		if (ret) {
-			dev_err(dev, "Failed to initialize DMA: %d\n", ret);
-			return ret;
-		}
-	}
-
 	mhi_cntrl->mmio = epf_mhi->mmio;
 	mhi_cntrl->irq = epf_mhi->irq;
 	mhi_cntrl->mru = info->mru;
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 2430384f9a89..ab714108dfdb 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -739,6 +739,12 @@  static int pci_epf_test_epc_init(struct pci_epf *epf)
 	bool msi_capable = true;
 	int ret;
 
+	epf_test->dma_supported = true;
+
+	ret = pci_epf_test_init_dma_chan(epf_test);
+	if (ret)
+		epf_test->dma_supported = false;
+
 	epc_features = pci_epc_get_features(epc, epf->func_no, epf->vfunc_no);
 	if (epc_features) {
 		msix_capable = epc_features->msix_capable;
@@ -895,12 +901,6 @@  static int pci_epf_test_bind(struct pci_epf *epf)
 	if (ret)
 		return ret;
 
-	epf_test->dma_supported = true;
-
-	ret = pci_epf_test_init_dma_chan(epf_test);
-	if (ret)
-		epf_test->dma_supported = false;
-
 	return 0;
 }