[dpdk-dev] [PATCH] eal: map io resources for non x86 architectures

[David Marchand]

x86 requires a special set of instructions to access ioports, but other
architectures let you remap io resources.
So let eal remap io resources by accepting IORESOURCE_IO flag for
architectures other than x86.

Signed-off-by: David Marchand <david.marchand at 6wind.com>
---
 lib/librte_eal/common/include/rte_pci.h |    3 ++-
 lib/librte_eal/linuxapp/eal/eal_pci.c   |   21 +++++++++++++++------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h
index 334c12e..8aaab4a 100644
--- a/lib/librte_eal/common/include/rte_pci.h
+++ b/lib/librte_eal/common/include/rte_pci.h
@@ -105,7 +105,8 @@ extern struct pci_device_list pci_device_list; /**< Global list of PCI devices.
 /** Nb. of values in PCI resource format. */
 #define PCI_RESOURCE_FMT_NVAL 3
 
-/** IO resource type: memory address space */
+/** IO resource type: */
+#define IORESOURCE_IO         0x00000100
 #define IORESOURCE_MEM        0x00000200
 
 /**
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index bc5b5be..9c4651d 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -236,12 +236,21 @@ pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
 			goto error;
 		}
 
-		if (flags & IORESOURCE_MEM) {
-			dev->mem_resource[i].phys_addr = phys_addr;
-			dev->mem_resource[i].len = end_addr - phys_addr + 1;
-			/* not mapped for now */
-			dev->mem_resource[i].addr = NULL;
-		}
+		/* we only care about IORESOURCE_IO or IORESOURCE_MEM */
+		if (!(flags & IORESOURCE_IO) &&
+		    !(flags & IORESOURCE_MEM))
+			continue;
+
+#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
+		/* x86 can not remap ioports, so skip it, remapping code will
+		 * look at dev->mem_resource[i].phys_addr == 0 and skip it */
+		if (flags & IORESOURCE_IO)
+			continue;
+#endif
+		dev->mem_resource[i].phys_addr = phys_addr;
+		dev->mem_resource[i].len = end_addr - phys_addr + 1;
+		/* not mapped for now */
+		dev->mem_resource[i].addr = NULL;
 	}
 	fclose(f);
 	return 0;
-- 
1.7.10.4