[IA64-SGI] sn2-pci-dma-abstraction.patch

Provide an abstraction of the altix pci dma runtime layer so that multiple
pci-based bridges can be supported.

Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

3 files changed, 18 insertions, 4 deletions

diff --git a/arch/ia64/sn/include/pci/pcibr_provider.h b/arch/ia64/sn/include/pci/pcibr_provider.h
index b1f05ffec70b..1cd291d8badd 100644
--- a/arch/ia64/sn/include/pci/pcibr_provider.h
+++ b/arch/ia64/sn/include/pci/pcibr_provider.h
@@ -123,9 +123,11 @@ pcibr_lock(struct pcibus_info *pcibus_info)
 }
 #define pcibr_unlock(pcibus_info, flag)  spin_unlock_irqrestore(&pcibus_info->pbi_lock, flag)
 
+extern int  pcibr_init_provider(void);
 extern void *pcibr_bus_fixup(struct pcibus_bussoft *);
-extern uint64_t pcibr_dma_map(struct pcidev_info *, unsigned long, size_t, unsigned int);
-extern void pcibr_dma_unmap(struct pcidev_info *, dma_addr_t, int);
+extern dma_addr_t pcibr_dma_map(struct pci_dev *, unsigned long, size_t);
+extern dma_addr_t pcibr_dma_map_consistent(struct pci_dev *, unsigned long, size_t);
+extern void pcibr_dma_unmap(struct pci_dev *, dma_addr_t, int);
 
 /*
  * prototypes for the bridge asic register access routines in pcibr_reg.c
diff --git a/arch/ia64/sn/include/pci/pcibus_provider_defs.h b/arch/ia64/sn/include/pci/pcibus_provider_defs.h
index 07065615bbea..f546b4ece33c 100644
--- a/arch/ia64/sn/include/pci/pcibus_provider_defs.h
+++ b/arch/ia64/sn/include/pci/pcibus_provider_defs.h
@@ -18,6 +18,8 @@
 #define PCIIO_ASIC_TYPE_PIC     2
 #define PCIIO_ASIC_TYPE_TIOCP   3
 
+#define PCIIO_ASIC_MAX_TYPES    4
+
 /*
  * Common pciio bus provider data.  There should be one of these as the
  * first field in any pciio based provider soft structure (e.g. pcibr_soft
@@ -35,9 +37,15 @@ struct pcibus_bussoft {
 };
 
 /*
- * DMA mapping flags
+ * SN pci bus indirection
  */
 
-#define SN_PCIDMA_CONSISTENT    0x0001
+struct sn_pcibus_provider {
+        dma_addr_t      (*dma_map)(struct pci_dev *, unsigned long, size_t);
+        dma_addr_t      (*dma_map_consistent)(struct pci_dev *, unsigned long, size_t);
+        void            (*dma_unmap)(struct pci_dev *, dma_addr_t, int);
+        void *          (*bus_fixup)(struct pcibus_bussoft *);
+};
 
+extern struct sn_pcibus_provider *sn_pci_provider[];
 #endif                          /* _ASM_IA64_SN_PCI_PCIBUS_PROVIDER_H */
diff --git a/arch/ia64/sn/include/pci/pcidev.h b/arch/ia64/sn/include/pci/pcidev.h
index 81eb95d3bf47..ed4031d80811 100644
--- a/arch/ia64/sn/include/pci/pcidev.h
+++ b/arch/ia64/sn/include/pci/pcidev.h
@@ -32,6 +32,9 @@ extern struct sn_irq_info **sn_irq;
 #define SN_PCIDEV_BUSSOFT(pci_dev) \
         (SN_PCIDEV_INFO(pci_dev)->pdi_host_pcidev_info->pdi_pcibus_info)
 
+#define SN_PCIDEV_BUSPROVIDER(pci_dev) \
+        (SN_PCIDEV_INFO(pci_dev)->pdi_provider)
+
 #define PCIIO_BUS_NONE  255      /* bus 255 reserved */
 #define PCIIO_SLOT_NONE 255
 #define PCIIO_FUNC_NONE 255
@@ -46,6 +49,7 @@ struct pcidev_info {
         struct pci_dev          *pdi_linux_pcidev;      /* Kernel pci_dev */
 
         struct sn_irq_info      *pdi_sn_irq_info;
+        struct sn_pcibus_provider *pdi_provider;        /* sn pci ops */
 };
 
 extern void sn_irq_fixup(struct pci_dev *pci_dev,