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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>,
	"Davidlohr Bueso" <dave@stgolabs.net>,
	"Rob Herring" <robh+dt@kernel.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 v5 2/5] mmc: block: Support alternative_gpt_sector() operation
Date: Wed, 18 Aug 2021 03:55:44 +0300	[thread overview]
Message-ID: <20210818005547.14497-3-digetx@gmail.com> (raw)
In-Reply-To: <20210818005547.14497-1-digetx@gmail.com>

Support generic alternative_gpt_sector() block device operation by
invoking a new platform-specific MMC host hook that is also named
alternative_gpt_sector().

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/mmc/core/block.c | 30 ++++++++++++++++++++++++++++++
 include/linux/mmc/host.h |  4 ++++
 2 files changed, 34 insertions(+)

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 672cc505ce37..8ad1841f0dbd 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -178,6 +178,7 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
 			       int disable_multi,
 			       struct mmc_queue *mq);
 static void mmc_blk_hsq_req_done(struct mmc_request *mrq);
+static struct mmc_card *mmc_bdev_to_card(struct block_device *bdev);
 
 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
 {
@@ -801,6 +802,20 @@ static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
 }
 #endif
 
+static int mmc_blk_alternative_gpt_sector(struct block_device *bdev,
+					  sector_t *sector)
+{
+	struct mmc_card *card = mmc_bdev_to_card(bdev);
+
+	if (!card)
+		return -ENODEV;
+
+	if (!card->host->ops->alternative_gpt_sector)
+		return -EOPNOTSUPP;
+
+	return card->host->ops->alternative_gpt_sector(card, sector);
+}
+
 static const struct block_device_operations mmc_bdops = {
 	.open			= mmc_blk_open,
 	.release		= mmc_blk_release,
@@ -810,8 +825,23 @@ static const struct block_device_operations mmc_bdops = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl		= mmc_blk_compat_ioctl,
 #endif
+	.alternative_gpt_sector	= mmc_blk_alternative_gpt_sector,
 };
 
+static struct mmc_card *mmc_bdev_to_card(struct block_device *bdev)
+{
+	struct mmc_blk_data *md;
+
+	if (bdev->bd_disk->fops != &mmc_bdops)
+		return NULL;
+
+	md = mmc_blk_get(bdev->bd_disk);
+	if (!md)
+		return NULL;
+
+	return md->queue.card;
+}
+
 static int mmc_blk_part_switch_pre(struct mmc_card *card,
 				   unsigned int part_type)
 {
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 0abd47e9ef9b..18281c444bf6 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -190,6 +190,10 @@ struct mmc_host_ops {
 
 	/* Initialize an SD express card, mandatory for MMC_CAP2_SD_EXP. */
 	int	(*init_sd_express)(struct mmc_host *host, struct mmc_ios *ios);
+
+	/* Get platform-specific GPT entry location */
+	int	(*alternative_gpt_sector)(struct mmc_card *card,
+					  sector_t *sector);
 };
 
 struct mmc_cqe_ops {
-- 
2.32.0


  parent reply	other threads:[~2021-08-18  0:57 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-18  0:55 [PATCH v5 0/5] Support EFI partition on NVIDIA Tegra devices Dmitry Osipenko
2021-08-18  0:55 ` [PATCH v5 1/5] block: Add alternative_gpt_sector() operation Dmitry Osipenko
2021-08-18  5:20   ` Christoph Hellwig
2021-08-18  5:41     ` Dmitry Osipenko
2021-08-18  0:55 ` Dmitry Osipenko [this message]
2021-08-18  5:28   ` [PATCH v5 2/5] mmc: block: Support " Christoph Hellwig
2021-08-18  5:40     ` Dmitry Osipenko
2021-08-18  0:55 ` [PATCH v5 3/5] mmc: core: Add raw_boot_mult field to mmc_ext_csd Dmitry Osipenko
2021-08-18  0:55 ` [PATCH v5 4/5] mmc: sdhci-tegra: Implement alternative_gpt_sector() Dmitry Osipenko
2021-08-18  5:30   ` Christoph Hellwig
2021-08-18  5:42     ` Dmitry Osipenko
2021-08-18  9:55   ` Ulf Hansson
2021-08-18 13:35     ` Thierry Reding
2021-08-18 16:15       ` Dmitry Osipenko
2021-08-19  8:58         ` Thierry Reding
2021-08-19 13:20       ` Ulf Hansson
2021-08-19 17:19         ` Thierry Reding
2021-08-20  8:16           ` Ulf Hansson
2021-08-18  0:55 ` [PATCH v5 5/5] partitions/efi: Support non-standard GPT location Dmitry Osipenko
2021-08-18  5:25   ` Christoph Hellwig
2021-08-18  5:41     ` Dmitry Osipenko

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