From 46754246bddd1c15d61e915bd860448bab8d7400 Mon Sep 17 00:00:00 2001
From: "Suren A. Chilingaryan" <csa@suren.me>
Date: Thu, 19 Nov 2015 02:21:30 +0100
Subject: Driver versioning

---
 pcilib/pci.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++--
 pcilib/pci.h |  5 +++++
 2 files changed, 52 insertions(+), 2 deletions(-)

(limited to 'pcilib')

diff --git a/pcilib/pci.c b/pcilib/pci.c
index e45aaba..26dfdbf 100644
--- a/pcilib/pci.c
+++ b/pcilib/pci.c
@@ -108,6 +108,7 @@ static int pcilib_detect_model(pcilib_t *ctx, const char *model) {
 pcilib_t *pcilib_open(const char *device, const char *model) {
     int err, xmlerr;
     pcilib_t *ctx = malloc(sizeof(pcilib_t));
+    const pcilib_driver_version_t *drv_version;
 	
     if (!model)
 	model = getenv("PCILIB_MODEL");
@@ -123,6 +124,13 @@ pcilib_t *pcilib_open(const char *device, const char *model) {
 	    return NULL;
 	}
 	
+	drv_version = pcilib_get_driver_version(ctx);
+	if (!drv_version) {
+	    pcilib_error("Driver verification has failed (%s)", device);
+	    free(ctx);
+	    return NULL;
+	}
+	
 	ctx->page_mask = (uintptr_t)-1;
 	
 	if ((model)&&(!strcasecmp(model, "maintenance"))) {
@@ -224,6 +232,34 @@ pcilib_t *pcilib_open(const char *device, const char *model) {
 }
 
 
+const pcilib_driver_version_t *pcilib_get_driver_version(pcilib_t *ctx) {
+    int ret;
+    
+    if (!ctx->driver_version.version) {
+	ret = ioctl( ctx->handle, PCIDRIVER_IOC_VERSION, &ctx->driver_version );
+	if (ret) {
+	    pcilib_error("PCIDRIVER_IOC_DRIVER_VERSION ioctl have failed");
+	    return NULL;
+	}
+	
+	if (ctx->driver_version.interface != PCIDRIVER_INTERFACE_VERSION) {
+	    pcilib_error("Using pcilib (version: %u.%u.%u, driver interface: 0x%lx) with incompatible driver (version: %u.%u.%u, interface: 0x%lx)", 
+		PCILIB_VERSION_GET_MAJOR(PCILIB_VERSION),
+		PCILIB_VERSION_GET_MINOR(PCILIB_VERSION),
+		PCILIB_VERSION_GET_MICRO(PCILIB_VERSION),
+		PCIDRIVER_INTERFACE_VERSION,
+		PCILIB_VERSION_GET_MAJOR(ctx->driver_version.version),
+		PCILIB_VERSION_GET_MINOR(ctx->driver_version.version),
+		PCILIB_VERSION_GET_MICRO(ctx->driver_version.version),
+		ctx->driver_version.interface
+	    );
+	    return NULL;
+	}
+    }
+
+    return &ctx->driver_version;
+}
+
 const pcilib_board_info_t *pcilib_get_board_info(pcilib_t *ctx) {
     int ret;
     
@@ -236,7 +272,7 @@ const pcilib_board_info_t *pcilib_get_board_info(pcilib_t *ctx) {
 	
 	ctx->page_mask = pcilib_get_page_mask();
     }
-    
+
     return &ctx->board_info;
 }
 
@@ -432,8 +468,17 @@ const pcilib_pcie_link_info_t *pcilib_get_pcie_link_info(pcilib_t *ctx) {
     return &ctx->link_info;
 }
 
+int pcilib_get_device_state(pcilib_t *ctx, pcilib_device_state_t *state) {
+    int ret = ioctl( ctx->handle, PCIDRIVER_IOC_DEVICE_STATE, state);
+    if (ret < 0) {
+	pcilib_error("PCIDRIVER_IOC_DEVICE_STATE ioctl have failed");
+	return PCILIB_ERROR_FAILED;
+    }
+    return 0;
+}
+
 int pcilib_set_dma_mask(pcilib_t *ctx, int mask) {
-    if (ioctl( ctx->handle, PCIDRIVER_IOC_SET_DMA_MASK, mask ) < 0)
+    if (ioctl(ctx->handle, PCIDRIVER_IOC_DMA_MASK, mask) < 0)
 	return PCILIB_ERROR_FAILED;
 
     return 0;
diff --git a/pcilib/pci.h b/pcilib/pci.h
index bf977fc..b81d295 100644
--- a/pcilib/pci.h
+++ b/pcilib/pci.h
@@ -48,6 +48,7 @@ struct pcilib_s {
     int handle;										/**< file handle of device */
     
     uintptr_t page_mask;								/**< Selects bits which define offset within the page */
+    pcilib_driver_version_t driver_version;						/**< Version reported by the driver */
     pcilib_board_info_t board_info;							/**< The mandatory information about board as defined by PCI specification */
     pcilib_pcie_link_info_t link_info;							/**< Infomation about PCIe connection */
     char *bar_space[PCILIB_MAX_BARS];							/**< Pointers to the mapped BARs in virtual address space */
@@ -112,8 +113,12 @@ extern "C" {
 #endif
 
 pcilib_context_t *pcilib_get_implementation_context(pcilib_t *ctx);
+
+const pcilib_driver_version_t *pcilib_get_driver_version(pcilib_t *ctx);
 const pcilib_board_info_t *pcilib_get_board_info(pcilib_t *ctx);
 const pcilib_pcie_link_info_t *pcilib_get_pcie_link_info(pcilib_t *ctx);
+int pcilib_get_device_state(pcilib_t *ctx, pcilib_device_state_t *state);
+
 
 int pcilib_map_register_space(pcilib_t *ctx);
 int pcilib_map_data_space(pcilib_t *ctx, uintptr_t addr);
-- 
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