scsi: ufs: exynos: Fix DMA alignment for PAGE_SIZE != 4096

The Exynos UFS controller only supports scatter/gather list elements that
are aligned on a 4 KiB boundary. Fix DMA alignment in case PAGE_SIZE !=
4096. Rename UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE into
UFSHCD_QUIRK_4KB_DMA_ALIGNMENT.

Cc: Kiwoong Kim <kwmad.kim@samsung.com>
Fixes: 2b2bfc8aa519 ("scsi: ufs: Introduce a quirk to allow only page-aligned sg entries")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 064a6d8..e626810 100644 (file)
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -5107,8 +5107,8 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
        ufshcd_hpb_configure(hba, sdev);
 
        blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1);
-       if (hba->quirks & UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE)
-               blk_queue_update_dma_alignment(q, PAGE_SIZE - 1);
+       if (hba->quirks & UFSHCD_QUIRK_4KB_DMA_ALIGNMENT)
+               blk_queue_update_dma_alignment(q, 4096 - 1);
        /*
         * Block runtime-pm until all consumers are added.
         * Refer ufshcd_setup_links().

diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
index c3628a8..3cdac89 100644 (file)
--- a/drivers/ufs/host/ufs-exynos.c
+++ b/drivers/ufs/host/ufs-exynos.c
@@ -1673,7 +1673,7 @@ static const struct exynos_ufs_drv_data exynos_ufs_drvs = {
                                  UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR |
                                  UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL |
                                  UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING |
-                                 UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE,
+                                 UFSHCD_QUIRK_4KB_DMA_ALIGNMENT,
        .opts                   = EXYNOS_UFS_OPT_HAS_APB_CLK_CTRL |
                                  EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL |
                                  EXYNOS_UFS_OPT_BROKEN_RX_SEL_IDX |

diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 1779238..57a5af2 100644 (file)
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -583,9 +583,9 @@ enum ufshcd_quirks {
        UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING = 1 << 13,
 
        /*
-        * This quirk allows only sg entries aligned with page size.
+        * Align DMA SG entries on a 4 KiB boundary.
         */
-       UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE            = 1 << 14,
+       UFSHCD_QUIRK_4KB_DMA_ALIGNMENT                  = 1 << 14,
 
        /*
         * This quirk needs to be enabled if the host controller does not