Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c
index 5b78f3b..e184992 100644
--- a/drivers/pci/ats.c
+++ b/drivers/pci/ats.c
@@ -142,6 +142,33 @@
}
EXPORT_SYMBOL_GPL(pci_ats_queue_depth);
+/**
+ * pci_ats_page_aligned - Return Page Aligned Request bit status.
+ * @pdev: the PCI device
+ *
+ * Returns 1, if the Untranslated Addresses generated by the device
+ * are always aligned or 0 otherwise.
+ *
+ * Per PCIe spec r4.0, sec 10.5.1.2, if the Page Aligned Request bit
+ * is set, it indicates the Untranslated Addresses generated by the
+ * device are always aligned to a 4096 byte boundary.
+ */
+int pci_ats_page_aligned(struct pci_dev *pdev)
+{
+ u16 cap;
+
+ if (!pdev->ats_cap)
+ return 0;
+
+ pci_read_config_word(pdev, pdev->ats_cap + PCI_ATS_CAP, &cap);
+
+ if (cap & PCI_ATS_CAP_PAGE_ALIGNED)
+ return 1;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pci_ats_page_aligned);
+
#ifdef CONFIG_PCI_PRI
/**
* pci_enable_pri - Enable PRI capability
@@ -368,6 +395,36 @@
}
EXPORT_SYMBOL_GPL(pci_pasid_features);
+/**
+ * pci_prg_resp_pasid_required - Return PRG Response PASID Required bit
+ * status.
+ * @pdev: PCI device structure
+ *
+ * Returns 1 if PASID is required in PRG Response Message, 0 otherwise.
+ *
+ * Even though the PRG response PASID status is read from PRI Status
+ * Register, since this API will mainly be used by PASID users, this
+ * function is defined within #ifdef CONFIG_PCI_PASID instead of
+ * CONFIG_PCI_PRI.
+ */
+int pci_prg_resp_pasid_required(struct pci_dev *pdev)
+{
+ u16 status;
+ int pos;
+
+ pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
+ if (!pos)
+ return 0;
+
+ pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status);
+
+ if (status & PCI_PRI_STATUS_PASID)
+ return 1;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pci_prg_resp_pasid_required);
+
#define PASID_NUMBER_SHIFT 8
#define PASID_NUMBER_MASK (0x1f << PASID_NUMBER_SHIFT)
/**
@@ -375,7 +432,7 @@
* @pdev: PCI device structure
*
* Returns negative value when PASID capability is not present.
- * Otherwise it returns the numer of supported PASIDs.
+ * Otherwise it returns the number of supported PASIDs.
*/
int pci_max_pasids(struct pci_dev *pdev)
{