From: Dmitry Osipenko <digetx@gmail.com>
To: "Jens Axboe" <axboe@kernel.dk>,
"Thierry Reding" <thierry.reding@gmail.com>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"Michał Mirosław" <mirq-linux@rere.qmqm.pl>,
"David Heidelberg" <david@ixit.cz>,
"Peter Geis" <pgwipeout@gmail.com>,
"Ulf Hansson" <ulf.hansson@linaro.org>,
"Adrian Hunter" <adrian.hunter@intel.com>,
"Christoph Hellwig" <hch@infradead.org>,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
"Davidlohr Bueso" <dave@stgolabs.net>,
"Randy Dunlap" <rdunlap@infradead.org>,
"Ion Agorria" <AG0RRIA@yahoo.com>,
"Svyatoslav Ryhel" <clamor95@gmail.com>
Cc: linux-tegra@vger.kernel.org, linux-block@vger.kernel.org,
linux-efi <linux-efi@vger.kernel.org>
Subject: [PATCH v1 2/3] mmc: block: Add mmc_bdev_to_card() helper
Date: Sun, 28 Mar 2021 00:20:59 +0300 [thread overview]
Message-ID: <20210327212100.3834-3-digetx@gmail.com> (raw)
In-Reply-To: <20210327212100.3834-1-digetx@gmail.com>
Add mmc_bdev_to_card() helper which is needed for finding EFI entry
on EMMC of NVIDIA Tegra devices.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/mmc/core/block.c | 15 +++++++++++++++
include/linux/mmc/blkdev.h | 13 +++++++++++++
2 files changed, 28 insertions(+)
create mode 100644 include/linux/mmc/blkdev.h
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index fe5892d30778..666066fd6037 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -40,6 +40,7 @@
#include <linux/debugfs.h>
#include <linux/mmc/ioctl.h>
+#include <linux/mmc/blkdev.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
@@ -306,6 +307,20 @@ static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
return ret;
}
+struct mmc_card *mmc_bdev_to_card(struct block_device *bdev)
+{
+ struct mmc_blk_data *md;
+
+ if (bdev->bd_disk->major != MMC_BLOCK_MAJOR)
+ return NULL;
+
+ md = mmc_blk_get(bdev->bd_disk);
+ if (!md)
+ return NULL;
+
+ return md->queue.card;
+}
+
static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
{
struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
diff --git a/include/linux/mmc/blkdev.h b/include/linux/mmc/blkdev.h
new file mode 100644
index 000000000000..67608c58de70
--- /dev/null
+++ b/include/linux/mmc/blkdev.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/include/linux/mmc/blkdev.h
+ */
+#ifndef LINUX_MMC_BLOCK_DEVICE_H
+#define LINUX_MMC_BLOCK_DEVICE_H
+
+struct block_device;
+struct mmc_card;
+
+struct mmc_card *mmc_bdev_to_card(struct block_device *bdev);
+
+#endif /* LINUX_MMC_BLOCK_DEVICE_H */
--
2.30.2
next prev parent reply other threads:[~2021-03-27 21:24 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-27 21:20 [PATCH v1 0/3] Support EFI partition on NVIDIA Tegra devices Dmitry Osipenko
2021-03-27 21:20 ` [PATCH v1 1/3] mmc: core: Add raw_boot_mult field to mmc_ext_csd Dmitry Osipenko
2021-03-27 21:20 ` Dmitry Osipenko [this message]
2021-03-27 21:21 ` [PATCH v1 3/3] partitions/efi: Support gpt_sector parameter needed by NVIDIA Tegra devices Dmitry Osipenko
2021-03-29 6:18 ` Christoph Hellwig
2021-03-29 13:07 ` Dmitry Osipenko
2021-03-29 17:31 ` Davidlohr Bueso
2021-03-29 18:38 ` Dmitry Osipenko
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