linux-kernel - [PATCH v4 05/10] PCI: endpoint: pci-epf-test: Refactor pci_epf_test

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Message-Id: <20240430-pci-epf-rework-v4-5-22832d0d456f@linaro.org>
Date: Tue, 30 Apr 2024 11:43:46 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Jingoo Han <jingoohan1@...il.com>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>
Cc: linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 linux-kernel@...r.kernel.org, mhi@...ts.linux.dev, 
 linux-tegra@...r.kernel.org, Niklas Cassel <cassel@...nel.org>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v4 05/10] PCI: endpoint: pci-epf-test: Refactor
 pci_epf_test_unbind() function

Move the pci_epc_clear_bar() and pci_epf_free_space() code to respective
helper functions. This allows reusing the helpers in future commits.

This also requires moving the pci_epf_test_unbind() definition below
pci_epf_test_bind() to avoid forward declaration of the above helpers.

No functional change.

Reviewed-by: Niklas Cassel <cassel@...nel.org>
Tested-by: Niklas Cassel <cassel@...nel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/pci/endpoint/functions/pci-epf-test.c | 58 ++++++++++++++++++---------
 1 file changed, 39 insertions(+), 19 deletions(-)

diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 8175d4f2a0eb..2430384f9a89 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -686,25 +686,6 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
 			   msecs_to_jiffies(1));
 }
 
-static void pci_epf_test_unbind(struct pci_epf *epf)
-{
-	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
-	struct pci_epc *epc = epf->epc;
-	int bar;
-
-	cancel_delayed_work(&epf_test->cmd_handler);
-	pci_epf_test_clean_dma_chan(epf_test);
-	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
-		if (!epf_test->reg[bar])
-			continue;
-
-		pci_epc_clear_bar(epc, epf->func_no, epf->vfunc_no,
-				  &epf->bar[bar]);
-		pci_epf_free_space(epf, epf_test->reg[bar], bar,
-				   PRIMARY_INTERFACE);
-	}
-}
-
 static int pci_epf_test_set_bar(struct pci_epf *epf)
 {
 	int bar, ret;
@@ -731,6 +712,21 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
 	return 0;
 }
 
+static void pci_epf_test_clear_bar(struct pci_epf *epf)
+{
+	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
+	struct pci_epc *epc = epf->epc;
+	int bar;
+
+	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
+		if (!epf_test->reg[bar])
+			continue;
+
+		pci_epc_clear_bar(epc, epf->func_no, epf->vfunc_no,
+				  &epf->bar[bar]);
+	}
+}
+
 static int pci_epf_test_epc_init(struct pci_epf *epf)
 {
 	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
@@ -857,6 +853,20 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
 	return 0;
 }
 
+static void pci_epf_test_free_space(struct pci_epf *epf)
+{
+	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
+	int bar;
+
+	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
+		if (!epf_test->reg[bar])
+			continue;
+
+		pci_epf_free_space(epf, epf_test->reg[bar], bar,
+				   PRIMARY_INTERFACE);
+	}
+}
+
 static int pci_epf_test_bind(struct pci_epf *epf)
 {
 	int ret;
@@ -894,6 +904,16 @@ static int pci_epf_test_bind(struct pci_epf *epf)
 	return 0;
 }
 
+static void pci_epf_test_unbind(struct pci_epf *epf)
+{
+	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
+
+	cancel_delayed_work(&epf_test->cmd_handler);
+	pci_epf_test_clean_dma_chan(epf_test);
+	pci_epf_test_clear_bar(epf);
+	pci_epf_test_free_space(epf);
+}
+
 static const struct pci_epf_device_id pci_epf_test_ids[] = {
 	{
 		.name = "pci_epf_test",

-- 
2.25.1