netdev - [PATCH 8/9] vdap: solidrun: Replace deprecated PCI functions

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Message-ID: <20240819165148.58201-10-pstanner@redhat.com>
Date: Mon, 19 Aug 2024 18:51:48 +0200
From: Philipp Stanner <pstanner@...hat.com>
To: onathan Corbet <corbet@....net>,
	Jens Axboe <axboe@...nel.dk>,
	Wu Hao <hao.wu@...el.com>,
	Tom Rix <trix@...hat.com>,
	Moritz Fischer <mdf@...nel.org>,
	Xu Yilun <yilun.xu@...el.com>,
	Andy Shevchenko <andy@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Alvaro Karsz <alvaro.karsz@...id-run.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	Richard Cochran <richardcochran@...il.com>,
	Mark Brown <broonie@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Philipp Stanner <pstanner@...hat.com>,
	Hannes Reinecke <hare@...e.de>,
	Damien Le Moal <dlemoal@...nel.org>,
	Chaitanya Kulkarni <kch@...dia.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc: linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-block@...r.kernel.org,
	linux-fpga@...r.kernel.org,
	linux-gpio@...r.kernel.org,
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	linux-pci@...r.kernel.org,
	virtualization@...ts.linux.dev
Subject: [PATCH 8/9] vdap: solidrun: Replace deprecated PCI functions

solidrun utilizes pcim_iomap_regions(), which has been deprecated by the
PCI subsystem in commit e354bb84a4c1 ("PCI: Deprecate
pcim_iomap_table(), pcim_iomap_regions_request_all()"), among other
things because it forces usage of quite a complicated bitmask mechanism.
The bitmask handling code can entirely be removed by replacing
pcim_iomap_regions() and pcim_iomap_table().

Replace pcim_iomap_regions() and pcim_iomap_table() with
pci_iomap_region().

Signed-off-by: Philipp Stanner <pstanner@...hat.com>
---
 drivers/vdpa/solidrun/snet_main.c | 47 +++++++++++--------------------
 1 file changed, 16 insertions(+), 31 deletions(-)

diff --git a/drivers/vdpa/solidrun/snet_main.c b/drivers/vdpa/solidrun/snet_main.c
index 99428a04068d..abf027ca35e1 100644
--- a/drivers/vdpa/solidrun/snet_main.c
+++ b/drivers/vdpa/solidrun/snet_main.c
@@ -556,33 +556,24 @@ static const struct vdpa_config_ops snet_config_ops = {
 static int psnet_open_pf_bar(struct pci_dev *pdev, struct psnet *psnet)
 {
 	char name[50];
-	int ret, i, mask = 0;
+	int i;
+
+	snprintf(name, sizeof(name), "psnet[%s]-bars", pci_name(pdev));
+
 	/* We don't know which BAR will be used to communicate..
 	 * We will map every bar with len > 0.
 	 *
 	 * Later, we will discover the BAR and unmap all other BARs.
 	 */
 	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
-		if (pci_resource_len(pdev, i))
-			mask |= (1 << i);
-	}
-
-	/* No BAR can be used.. */
-	if (!mask) {
-		SNET_ERR(pdev, "Failed to find a PCI BAR\n");
-		return -ENODEV;
-	}
-
-	snprintf(name, sizeof(name), "psnet[%s]-bars", pci_name(pdev));
-	ret = pcim_iomap_regions(pdev, mask, name);
-	if (ret) {
-		SNET_ERR(pdev, "Failed to request and map PCI BARs\n");
-		return ret;
-	}
+		if (pci_resource_len(pdev, i)) {
+			psnet->bars[i] = pcim_iomap_region(pdev, i, name);
+			if (IS_ERR(psnet->bars[i])) {
+				SNET_ERR(pdev, "Failed to request and map PCI BARs\n");
+				return PTR_ERR(psnet->bars[i]);
+			}
+		}
 
-	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
-		if (mask & (1 << i))
-			psnet->bars[i] = pcim_iomap_table(pdev)[i];
 	}
 
 	return 0;
@@ -591,18 +582,15 @@ static int psnet_open_pf_bar(struct pci_dev *pdev, struct psnet *psnet)
 static int snet_open_vf_bar(struct pci_dev *pdev, struct snet *snet)
 {
 	char name[50];
-	int ret;
 
 	snprintf(name, sizeof(name), "snet[%s]-bar", pci_name(pdev));
 	/* Request and map BAR */
-	ret = pcim_iomap_regions(pdev, BIT(snet->psnet->cfg.vf_bar), name);
-	if (ret) {
+	snet->bar = pcim_iomap_region(pdev, snet->psnet->cfg.vf_bar, name);
+	if (IS_ERR(snet->bar)) {
 		SNET_ERR(pdev, "Failed to request and map PCI BAR for a VF\n");
-		return ret;
+		return PTR_ERR(snet->bar);
 	}
 
-	snet->bar = pcim_iomap_table(pdev)[snet->psnet->cfg.vf_bar];
-
 	return 0;
 }
 
@@ -650,15 +638,12 @@ static int psnet_detect_bar(struct psnet *psnet, u32 off)
 
 static void psnet_unmap_unused_bars(struct pci_dev *pdev, struct psnet *psnet)
 {
-	int i, mask = 0;
+	int i;
 
 	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
 		if (psnet->bars[i] && i != psnet->barno)
-			mask |= (1 << i);
+			pcim_iounmap_region(pdev, i);
 	}
-
-	if (mask)
-		pcim_iounmap_regions(pdev, mask);
 }
 
 /* Read SNET config from PCI BAR */
-- 
2.46.0