[dpdk-dev] [PATCH 06/13] pci: avoid inlining functions

Gaetan Rivet gaetan.rivet at 6wind.com
Fri Aug 25 11:04:28 CEST 2017


Parsing operations should not happen in performance critical sections.
Headers should not propose implementations unless duly required.

Signed-off-by: Gaetan Rivet <gaetan.rivet at 6wind.com>
---
 lib/librte_pci/include/rte_pci.h   | 69 ++++----------------------------------
 lib/librte_pci/rte_pci.c           | 65 +++++++++++++++++++++++++++++++++++
 lib/librte_pci/rte_pci_version.map |  4 +++
 3 files changed, 75 insertions(+), 63 deletions(-)

diff --git a/lib/librte_pci/include/rte_pci.h b/lib/librte_pci/include/rte_pci.h
index 3858e80..09a609a 100644
--- a/lib/librte_pci/include/rte_pci.h
+++ b/lib/librte_pci/include/rte_pci.h
@@ -126,19 +126,6 @@ struct mapped_pci_resource {
 /** mapped pci device list */
 TAILQ_HEAD(mapped_pci_res_list, mapped_pci_resource);
 
-/**< Internal use only - Macro used by pci addr parsing functions **/
-#define GET_PCIADDR_FIELD(in, fd, lim, dlm)                   \
-do {                                                               \
-	unsigned long val;                                      \
-	char *end;                                              \
-	errno = 0;                                              \
-	val = strtoul((in), &end, 16);                          \
-	if (errno != 0 || end[0] != (dlm) || val > (lim))       \
-		return -EINVAL;                                 \
-	(fd) = (typeof (fd))val;                                \
-	(in) = end + 1;                                         \
-} while(0)
-
 /**
  * Utility function to produce a PCI Bus-Device-Function value
  * given a string representation. Assumes that the BDF is provided without
@@ -152,15 +139,7 @@ do {                                                               \
  * @return
  *  0 on success, negative on error.
  */
-static inline int
-eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
-{
-	dev_addr->domain = 0;
-	GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
-	GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
-	GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
-	return 0;
-}
+int eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr);
 
 /**
  * Utility function to produce a PCI Bus-Device-Function value
@@ -174,16 +153,7 @@ eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
  * @return
  *  0 on success, negative on error.
  */
-static inline int
-eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
-{
-	GET_PCIADDR_FIELD(input, dev_addr->domain, UINT16_MAX, ':');
-	GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
-	GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
-	GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
-	return 0;
-}
-#undef GET_PCIADDR_FIELD
+int eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr);
 
 /**
  * Utility function to write a pci device name, this device name can later be
@@ -197,17 +167,9 @@ eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
  * @param size
  *	The output buffer size
  */
-static inline void
-rte_pci_device_name(const struct rte_pci_addr *addr,
-		char *output, size_t size)
-{
-	RTE_VERIFY(size >= PCI_PRI_STR_SIZE);
-	RTE_VERIFY(snprintf(output, size, PCI_PRI_FMT,
-			    addr->domain, addr->bus,
-			    addr->devid, addr->function) >= 0);
-}
+void rte_pci_device_name(const struct rte_pci_addr *addr,
+			 char *output, size_t size);
 
-/* Compare two PCI device addresses. */
 /**
  * Utility function to compare two PCI device addresses.
  *
@@ -220,27 +182,8 @@ rte_pci_device_name(const struct rte_pci_addr *addr,
  *	Positive on addr is greater than addr2.
  *	Negative on addr is less than addr2, or error.
  */
-static inline int
-rte_eal_compare_pci_addr(const struct rte_pci_addr *addr,
-			 const struct rte_pci_addr *addr2)
-{
-	uint64_t dev_addr, dev_addr2;
-
-	if ((addr == NULL) || (addr2 == NULL))
-		return -1;
-
-	dev_addr = ((uint64_t)addr->domain << 24) |
-		(addr->bus << 16) | (addr->devid << 8) | addr->function;
-	dev_addr2 = ((uint64_t)addr2->domain << 24) |
-		(addr2->bus << 16) | (addr2->devid << 8) | addr2->function;
-
-	if (dev_addr > dev_addr2)
-		return 1;
-	else if (dev_addr < dev_addr2)
-		return -1;
-	else
-		return 0;
-}
+int rte_eal_compare_pci_addr(const struct rte_pci_addr *addr,
+			     const struct rte_pci_addr *addr2);
 
 /**
  * Map a particular resource from a file.
diff --git a/lib/librte_pci/rte_pci.c b/lib/librte_pci/rte_pci.c
index 9dfdd3f..8584b55 100644
--- a/lib/librte_pci/rte_pci.c
+++ b/lib/librte_pci/rte_pci.c
@@ -53,6 +53,71 @@
 
 #include "rte_pci.h"
 
+/* Macro used by pci addr parsing functions. **/
+#define GET_PCIADDR_FIELD(in, fd, lim, dlm)                     \
+do {                                                            \
+	unsigned long val;                                      \
+	char *end;                                              \
+	errno = 0;                                              \
+	val = strtoul((in), &end, 16);                          \
+	if (errno != 0 || end[0] != (dlm) || val > (lim))       \
+		return -EINVAL;                                 \
+	(fd) = (typeof (fd))val;                                \
+	(in) = end + 1;                                         \
+} while(0)
+
+int
+eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
+{
+	dev_addr->domain = 0;
+	GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
+	GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
+	GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
+	return 0;
+}
+
+int
+eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
+{
+	GET_PCIADDR_FIELD(input, dev_addr->domain, UINT16_MAX, ':');
+	GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
+	GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
+	GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
+	return 0;
+}
+
+void
+rte_pci_device_name(const struct rte_pci_addr *addr,
+		    char *output, size_t size)
+{
+	RTE_VERIFY(size >= PCI_PRI_STR_SIZE);
+	RTE_VERIFY(snprintf(output, size, PCI_PRI_FMT,
+			    addr->domain, addr->bus,
+			    addr->devid, addr->function) >= 0);
+}
+
+int
+rte_eal_compare_pci_addr(const struct rte_pci_addr *addr,
+			 const struct rte_pci_addr *addr2)
+{
+	uint64_t dev_addr, dev_addr2;
+
+	if ((addr == NULL) || (addr2 == NULL))
+		return -1;
+
+	dev_addr = ((uint64_t)addr->domain << 24) |
+		(addr->bus << 16) | (addr->devid << 8) | addr->function;
+	dev_addr2 = ((uint64_t)addr2->domain << 24) |
+		(addr2->bus << 16) | (addr2->devid << 8) | addr2->function;
+
+	if (dev_addr > dev_addr2)
+		return 1;
+	else if (dev_addr < dev_addr2)
+		return -1;
+	else
+		return 0;
+}
+
 /* map a particular resource from a file */
 void *
 pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
diff --git a/lib/librte_pci/rte_pci_version.map b/lib/librte_pci/rte_pci_version.map
index 64dec54..a940259 100644
--- a/lib/librte_pci/rte_pci_version.map
+++ b/lib/librte_pci/rte_pci_version.map
@@ -1,8 +1,12 @@
 DPDK_17.11 {
 	global:
 
+	eal_parse_pci_BDF;
+	eal_parse_pci_DomBDF;
 	pci_map_resource;
 	pci_unmap_resource;
+	rte_eal_compare_pci_addr;
+	rte_pci_device_name;
 
 	local: *;
 };
-- 
2.1.4



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