s390/pci: DMA support
Add DMA IOMMU support using 4K page table entries. Implement dma_map_ops.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 2a6084f..e9dc009 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -75,8 +75,23 @@
struct msi_map *msi_map[ZPCI_NR_MSI_VECS];
unsigned int aisb; /* number of the summary bit */
+ /* DMA stuff */
+ unsigned long *dma_table;
+ spinlock_t dma_table_lock;
+ int tlb_refresh;
+
+ spinlock_t iommu_bitmap_lock;
+ unsigned long *iommu_bitmap;
+ unsigned long iommu_size;
+ unsigned long iommu_pages;
+ unsigned int next_bit;
+
struct zpci_bar_struct bars[PCI_BAR_COUNT];
+ u64 start_dma; /* Start of available DMA addresses */
+ u64 end_dma; /* End of available DMA addresses */
+ u64 dma_mask; /* DMA address space mask */
+
enum pci_bus_speed max_bus_speed;
};
@@ -95,6 +110,8 @@
void zpci_stop_device(struct zpci_dev *);
void zpci_free_device(struct zpci_dev *);
int zpci_scan_device(struct zpci_dev *);
+int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
+int zpci_unregister_ioat(struct zpci_dev *, u8);
/* CLP */
int clp_find_pci_devices(void);
@@ -115,4 +132,8 @@
struct zpci_dev *get_zdev_by_fid(u32);
bool zpci_fid_present(u32);
+/* DMA */
+int zpci_dma_init(void);
+void zpci_dma_exit(void);
+
#endif