From: "Grégory Soutadé" <gsoutade@neotion.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Chris Ball <chris@printf.net>,
Seungwon Jeon <tgih.jun@samsung.com>,
Jaehoon Chung <jh80.chung@samsung.com>,
linux-mmc <linux-mmc@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [PATCH v6 0003/0003] mmc: Checks EXT_CSD_PARTITION_SETTING_COMPLETED before partitions computation
Date: Mon, 15 Sep 2014 17:47:11 +0200 [thread overview]
Message-ID: <541709FF.6010408@neotion.com> (raw)
In-Reply-To: <541303BB.1000602@neotion.com>
Checks EXT_CSD_PARTITION_SETTING_COMPLETED bit before
computing enhanced user area offset and size, and
adding mmc general purpose partitions. The two needs
EXT_CSD_PARTITION_SETTING_COMPLETED bit be set to be
valid (as described in JEDEC standard).
Warn user in case of misconfiguration.
Signed-off-by: Grégory Soutadé <gsoutade@neotion.com>
---
drivers/mmc/core/mmc.c | 81 ++++++++++++++++++++++++++----------------------
1 file changed, 44 insertions(+), 37 deletions(-)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 64d0371..66928b0 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -300,7 +300,13 @@ static void mmc_select_card_type(struct mmc_card *card)
static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
{
- u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
+ u8 hc_erase_grp_sz, hc_wp_grp_sz;
+
+ /*
+ * Disable these attributes by default
+ */
+ card->ext_csd.enhanced_area_offset = -EINVAL;
+ card->ext_csd.enhanced_area_size = -EINVAL;
/*
* Enhanced area feature support -- check whether the eMMC
@@ -309,43 +315,41 @@ static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
*/
if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
(ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
- hc_erase_grp_sz =
- ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
- hc_wp_grp_sz =
- ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+ if (card->ext_csd.partition_setting_completed) {
+ hc_erase_grp_sz =
+ ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+ hc_wp_grp_sz =
+ ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
- /*
- * calculate the enhanced data area offset, in bytes
- */
- card->ext_csd.enhanced_area_offset =
- (ext_csd[139] << 24) + (ext_csd[138] << 16) +
- (ext_csd[137] << 8) + ext_csd[136];
- if (mmc_card_blockaddr(card))
- card->ext_csd.enhanced_area_offset <<= 9;
- /*
- * calculate the enhanced data area size, in kilobytes
- */
- card->ext_csd.enhanced_area_size =
- (ext_csd[142] << 16) + (ext_csd[141] << 8) +
- ext_csd[140];
- card->ext_csd.enhanced_area_size *=
- (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
- card->ext_csd.enhanced_area_size <<= 9;
- } else {
- /*
- * If the enhanced area is not enabled, disable these
- * device attributes.
- */
- card->ext_csd.enhanced_area_offset = -EINVAL;
- card->ext_csd.enhanced_area_size = -EINVAL;
+ /*
+ * calculate the enhanced data area offset, in bytes
+ */
+ card->ext_csd.enhanced_area_offset =
+ (ext_csd[139] << 24) + (ext_csd[138] << 16) +
+ (ext_csd[137] << 8) + ext_csd[136];
+ if (mmc_card_blockaddr(card))
+ card->ext_csd.enhanced_area_offset <<= 9;
+ /*
+ * calculate the enhanced data area size, in kilobytes
+ */
+ card->ext_csd.enhanced_area_size =
+ (ext_csd[142] << 16) + (ext_csd[141] << 8) +
+ ext_csd[140];
+ card->ext_csd.enhanced_area_size *=
+ (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
+ card->ext_csd.enhanced_area_size <<= 9;
+ } else {
+ pr_warn("%s: defines enhanced area without partition setting complete\n",
+ mmc_hostname(card->host));
+ }
}
}
static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
{
- unsigned int part_size;
- u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
int idx;
+ u8 hc_erase_grp_sz, hc_wp_grp_sz;
+ unsigned int part_size;
/*
* General purpose partition feature support --
@@ -354,18 +358,21 @@ static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
*/
if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
EXT_CSD_PART_SUPPORT_PART_EN) {
- if (card->ext_csd.partition_setting_completed) {
- hc_erase_grp_sz =
- ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
- hc_wp_grp_sz =
- ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
- }
+ hc_erase_grp_sz =
+ ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+ hc_wp_grp_sz =
+ ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
continue;
+ if (card->ext_csd.partition_setting_completed == 0) {
+ pr_warn("%s: has partition size defined without partition complete\n",
+ mmc_hostname(card->host));
+ break;
+ }
part_size =
(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
<< 16) +
--
1.7.9.5
next prev parent reply other threads:[~2014-09-15 15:50 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-17 14:57 [PATCH] mmc: check EXT_CSD_PARTITION_SETTING_COMPLETED before creating partitions Grégory Soutadé
2014-08-13 8:36 ` Ulf Hansson
2014-08-13 9:20 ` Grégory Soutadé
2014-08-14 11:46 ` Ulf Hansson
2014-08-14 13:27 ` Grégory Soutadé
2014-08-15 8:17 ` Ulf Hansson
2014-08-18 13:12 ` [PATCH v3 0001/0002] mmc: Replace ext_csd "enhanced_area_en" attribute by "partition_setting_completed" Grégory Soutadé
2014-09-11 6:38 ` [PATCH v4 0001/0003] mmc: Move code that manages user area and gp partitions into functions Grégory Soutadé
2014-09-12 14:31 ` [PATCH v5 0000/0003] mmc: EXT_CSD_PARTITION_SETTING_COMPLETED bit not checked Grégory Soutadé
2014-09-15 15:47 ` [PATCH v6 " Grégory Soutadé
2014-09-12 14:31 ` [PATCH v5 0001/0003] mmc: Move code that manages user area and gp partitions into functions Grégory Soutadé
2014-09-15 15:47 ` [PATCH v6 " Grégory Soutadé
2014-09-17 22:12 ` Ulf Hansson
2014-09-12 14:31 ` [PATCH v5 0002/0003] mmc: Replace "enhanced_area_en" attribute by "partition_setting_completed" Grégory Soutadé
2014-09-15 4:20 ` Jaehoon Chung
2014-09-15 15:47 ` [PATCH v6 " Grégory Soutadé
2014-09-17 22:12 ` Ulf Hansson
2014-09-12 14:31 ` [PATCH v5 0003/0003] mmc: Checks EXT_CSD_PARTITION_SETTING_COMPLETED before partitions computation Grégory Soutadé
2014-09-15 15:47 ` Grégory Soutadé [this message]
2014-09-17 22:13 ` [PATCH v6 " Ulf Hansson
2014-09-11 6:38 ` [PATCH v4 0002/0003] mmc: Replace "enhanced_area_en" attribute by "partition_setting_completed" Grégory Soutadé
2014-09-11 9:46 ` Ulf Hansson
2014-09-11 6:38 ` [PATCH v4 0003/0003] mmc: Checks EXT_CSD_PARTITION_SETTING_COMPLETED before partitions computation Grégory Soutadé
2014-08-18 13:12 ` [PATCH v3 0002/0002] mmc: Checks EXT_CSD_PARTITION_SETTING_COMPLETED bit " Grégory Soutadé
2014-09-08 12:15 ` Ulf Hansson
2014-08-18 10:49 ` [PATCH v2 0001/0002] mmc: check EXT_CSD_PARTITION_SETTING_COMPLETED before creating partitions Grégory Soutadé
2014-08-18 10:50 ` [PATCH v2 0002/0002] " Grégory Soutadé
2014-08-18 12:15 ` Ulf Hansson
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