If the controller doesn't support 64-bit addressing mode, it must not
set the DMA mask to 64-bit. But it's unconditionally trying to set to
64-bit without checking 64-bit addressing support in the controller
capabilities.
It was correctly checked before commit 3b1d05807a9a68c6d0580e9248247a774a4d3be6
("[SCSI] ufs: Segregate PCI Specific Code"), this aims to restores
the correct behaviour.
To achieve this in a generic way, firstly we should push down the DMA
mask setting routine ufshcd_set_dma_mask() from PCI glue driver to core
driver in order to do it for both PCI glue driver and Platform glue
driver. Secondly, we should change pci_ DMA mapping API to dma_ DMA
mapping API because core driver is independent of glue drivers.
Signed-off-by: Akinobu Mita <mita@xxxxxxxxxxxx>
Cc: Sujit Reddy Thumma <sthumma@xxxxxxxxxxxxxx>
Cc: Vinayak Holikatti <vinholikatti@xxxxxxxxx>
Cc: Santosh Y <santoshsy@xxxxxxxxx>
Cc: "James E.J. Bottomley" <JBottomley@xxxxxxxxxxxxx>
Cc: linux-scsi@xxxxxxxxxxxxxxx
---
This patch was rejected because of the incorrect usage of dma_set_mask().
Now it is fixed, but it also requires ufshcd-pltfrm change in the separate
patch 1/2.
In order to apply this patch cleanly, this patch depends on
'ufshcd-pci: release ioremapped region during removing driver' which
has already acked by Santosh.
drivers/scsi/ufs/ufshcd-pci.c | 26 --------------------------
drivers/scsi/ufs/ufshcd.c | 30 ++++++++++++++++++++++++++++++
2 files changed, 30 insertions(+), 26 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c
index 2349c0e..91a2e79 100644
--- a/drivers/scsi/ufs/ufshcd-pci.c
+++ b/drivers/scsi/ufs/ufshcd-pci.c
@@ -96,26 +96,6 @@ static void ufshcd_pci_remove(struct pci_dev *pdev)
}
/**
- * ufshcd_set_dma_mask - Set dma mask based on the controller
- * addressing capability
- * @pdev: PCI device structure
- *
- * Returns 0 for success, non-zero for failure
- */
-static int ufshcd_set_dma_mask(struct pci_dev *pdev)
-{
- int err;
-
- if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
- && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
- return 0;
- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
- if (!err)
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
- return err;
-}
-
-/**
* ufshcd_pci_probe - probe routine of the driver
* @pdev: pointer to PCI device handle
* @id: PCI device id
@@ -145,12 +125,6 @@ ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
mmio_base = pcim_iomap_table(pdev)[0];
- err = ufshcd_set_dma_mask(pdev);
- if (err) {
- dev_err(&pdev->dev, "set dma mask failed\n");
- return err;
- }
-
err = ufshcd_init(&pdev->dev, &hba, mmio_base, pdev->irq);
if (err) {
dev_err(&pdev->dev, "Initialization failed\n");
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index bd4d418..1f37c36 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1667,6 +1667,30 @@ void ufshcd_remove(struct ufs_hba *hba)
EXPORT_SYMBOL_GPL(ufshcd_remove);
/**
+ * ufshcd_set_dma_mask - Set dma mask based on the controller
+ * addressing capability
+ * @hba: per adapter instance
+ *
+ * Returns 0 for success, non-zero for failure
+ */
+static int ufshcd_set_dma_mask(struct ufs_hba *hba)
+{
+ int err;
+
+ if (hba->capabilities & MASK_64_ADDRESSING_SUPPORT) {
+ if (!dma_set_mask(hba->dev, DMA_BIT_MASK(64))) {
+ dma_set_coherent_mask(hba->dev, DMA_BIT_MASK(64));
+ return 0;
+ }
+ }
+ err = dma_set_mask(hba->dev, DMA_BIT_MASK(32));
+ if (!err)
+ dma_set_coherent_mask(hba->dev, DMA_BIT_MASK(32));
+
+ return err;
+}
+
+/**
* ufshcd_init - Driver initialization routine
* @dev: pointer to device handle
* @hba_handle: driver private handle
@@ -1717,6 +1741,12 @@ int ufshcd_init(struct device *dev, struct ufs_hba **hba_handle,
/* Get Interrupt bit mask per version */
hba->intr_mask = ufshcd_get_intr_mask(hba);
+ err = ufshcd_set_dma_mask(hba);
+ if (err) {
+ dev_err(hba->dev, "set dma mask failed\n");
+ goto out_disable;
+ }
+
/* Allocate memory for host memory space */
err = ufshcd_memory_alloc(hba);
if (err) {
--
1.8.3.1
--
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