Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

 2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

 3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

 4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

 5) Add eBPF based queue selection to tun, from Jason Wang.

 6) Lockless qdisc support, from John Fastabend.

 7) SCTP stream interleave support, from Xin Long.

 8) Smoother TCP receive autotuning, from Eric Dumazet.

 9) Lots of erspan tunneling enhancements, from William Tu.

10) Add true function call support to BPF, from Alexei Starovoitov.

11) Add explicit support for GRO HW offloading, from Michael Chan.

12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

17) Add resource abstration to devlink, from Arkadi Sharshevsky.

18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

19) Avoid locking in act_csum, from Davide Caratti.

20) devinet_ioctl() simplifications from Al viro.

21) More TCP bpf improvements from Lawrence Brakmo.

22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
  tls: Add support for encryption using async offload accelerator
  ip6mr: fix stale iterator
  net/sched: kconfig: Remove blank help texts
  openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
  tcp_nv: fix potential integer overflow in tcpnv_acked
  r8169: fix RTL8168EP take too long to complete driver initialization.
  qmi_wwan: Add support for Quectel EP06
  rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
  ipmr: Fix ptrdiff_t print formatting
  ibmvnic: Wait for device response when changing MAC
  qlcnic: fix deadlock bug
  tcp: release sk_frag.page in tcp_disconnect
  ipv4: Get the address of interface correctly.
  net_sched: gen_estimator: fix lockdep splat
  net: macb: Handle HRESP error
  net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
  ipv6: addrconf: break critical section in addrconf_verify_rtnl()
  ipv6: change route cache aging logic
  i40e/i40evf: Update DESC_NEEDED value to reflect larger value
  bnxt_en: cleanup DIM work on device shutdown
  ...

1 files changed, 39 insertions, 23 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
index 04dd575..ef30597 100644
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
@@ -372,8 +372,7 @@ nfp_cpp_area_alloc(struct nfp_cpp *cpp, u32 dest,
  * that it can be accessed directly.
  *
  * NOTE: @address and @size must be 32-bit aligned values.
- *
- * NOTE: The area must also be 'released' when the structure is freed.
+ * The area must also be 'released' when the structure is freed.
  *
  * Return: NFP CPP Area handle, or NULL
  */
@@ -536,8 +535,7 @@ void nfp_cpp_area_release_free(struct nfp_cpp_area *area)
  * Read data from indicated CPP region.
  *
  * NOTE: @offset and @length must be 32-bit aligned values.
- *
- * NOTE: Area must have been locked down with an 'acquire'.
+ * Area must have been locked down with an 'acquire'.
  *
  * Return: length of io, or -ERRNO
  */
@@ -558,8 +556,7 @@ int nfp_cpp_area_read(struct nfp_cpp_area *area,
  * Write data to indicated CPP region.
  *
  * NOTE: @offset and @length must be 32-bit aligned values.
- *
- * NOTE: Area must have been locked down with an 'acquire'.
+ * Area must have been locked down with an 'acquire'.
  *
  * Return: length of io, or -ERRNO
  */
@@ -571,6 +568,17 @@ int nfp_cpp_area_write(struct nfp_cpp_area *area,
 }
 
 /**
+ * nfp_cpp_area_size() - return size of a CPP area
+ * @cpp_area:	CPP area handle
+ *
+ * Return: Size of the area
+ */
+size_t nfp_cpp_area_size(struct nfp_cpp_area *cpp_area)
+{
+	return cpp_area->size;
+}
+
+/**
  * nfp_cpp_area_name() - return name of a CPP area
  * @cpp_area:	CPP area handle
  *
@@ -666,18 +674,20 @@ void __iomem *nfp_cpp_area_iomem(struct nfp_cpp_area *area)
  * @offset:	Offset into area
  * @value:	Pointer to read buffer
  *
- * Return: length of the io, or -ERRNO
+ * Return: 0 on success, or -ERRNO
  */
 int nfp_cpp_area_readl(struct nfp_cpp_area *area,
 		       unsigned long offset, u32 *value)
 {
 	u8 tmp[4];
-	int err;
+	int n;
 
-	err = nfp_cpp_area_read(area, offset, &tmp, sizeof(tmp));
-	*value = get_unaligned_le32(tmp);
+	n = nfp_cpp_area_read(area, offset, &tmp, sizeof(tmp));
+	if (n != sizeof(tmp))
+		return n < 0 ? n : -EIO;
 
-	return err;
+	*value = get_unaligned_le32(tmp);
+	return 0;
 }
 
 /**
@@ -686,16 +696,18 @@ int nfp_cpp_area_readl(struct nfp_cpp_area *area,
  * @offset:	Offset into area
  * @value:	Value to write
  *
- * Return: length of the io, or -ERRNO
+ * Return: 0 on success, or -ERRNO
  */
 int nfp_cpp_area_writel(struct nfp_cpp_area *area,
 			unsigned long offset, u32 value)
 {
 	u8 tmp[4];
+	int n;
 
 	put_unaligned_le32(value, tmp);
+	n = nfp_cpp_area_write(area, offset, &tmp, sizeof(tmp));
 
-	return nfp_cpp_area_write(area, offset, &tmp, sizeof(tmp));
+	return n == sizeof(tmp) ? 0 : n < 0 ? n : -EIO;
 }
 
 /**
@@ -704,18 +716,20 @@ int nfp_cpp_area_writel(struct nfp_cpp_area *area,
  * @offset:	Offset into area
  * @value:	Pointer to read buffer
  *
- * Return: length of the io, or -ERRNO
+ * Return: 0 on success, or -ERRNO
  */
 int nfp_cpp_area_readq(struct nfp_cpp_area *area,
 		       unsigned long offset, u64 *value)
 {
 	u8 tmp[8];
-	int err;
+	int n;
 
-	err = nfp_cpp_area_read(area, offset, &tmp, sizeof(tmp));
-	*value = get_unaligned_le64(tmp);
+	n = nfp_cpp_area_read(area, offset, &tmp, sizeof(tmp));
+	if (n != sizeof(tmp))
+		return n < 0 ? n : -EIO;
 
-	return err;
+	*value = get_unaligned_le64(tmp);
+	return 0;
 }
 
 /**
@@ -724,16 +738,18 @@ int nfp_cpp_area_readq(struct nfp_cpp_area *area,
  * @offset:	Offset into area
  * @value:	Value to write
  *
- * Return: length of the io, or -ERRNO
+ * Return: 0 on success, or -ERRNO
  */
 int nfp_cpp_area_writeq(struct nfp_cpp_area *area,
 			unsigned long offset, u64 value)
 {
 	u8 tmp[8];
+	int n;
 
 	put_unaligned_le64(value, tmp);
+	n = nfp_cpp_area_write(area, offset, &tmp, sizeof(tmp));
 
-	return nfp_cpp_area_write(area, offset, &tmp, sizeof(tmp));
+	return n == sizeof(tmp) ? 0 : n < 0 ? n : -EIO;
 }
 
 /**
@@ -1072,7 +1088,7 @@ static u32 nfp_xpb_to_cpp(struct nfp_cpp *cpp, u32 *xpb_addr)
  * @xpb_addr:	Address for operation
  * @value:	Pointer to read buffer
  *
- * Return: length of the io, or -ERRNO
+ * Return: 0 on success, or -ERRNO
  */
 int nfp_xpb_readl(struct nfp_cpp *cpp, u32 xpb_addr, u32 *value)
 {
@@ -1087,7 +1103,7 @@ int nfp_xpb_readl(struct nfp_cpp *cpp, u32 xpb_addr, u32 *value)
  * @xpb_addr:	Address for operation
  * @value:	Value to write
  *
- * Return: length of the io, or -ERRNO
+ * Return: 0 on success, or -ERRNO
  */
 int nfp_xpb_writel(struct nfp_cpp *cpp, u32 xpb_addr, u32 value)
 {
@@ -1105,7 +1121,7 @@ int nfp_xpb_writel(struct nfp_cpp *cpp, u32 xpb_addr, u32 value)
  *
  * KERNEL: This operation is safe to call in interrupt or softirq context.
  *
- * Return: length of the io, or -ERRNO
+ * Return: 0 on success, or -ERRNO
  */
 int nfp_xpb_writelm(struct nfp_cpp *cpp, u32 xpb_tgt,
 		    u32 mask, u32 value)