From a9c324be72b2243e1cddd3f9e7356849de39ae53 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:25:54 +0000
Subject: nfp: don't try to register XDP rxq structures on control queues

Some RX rings are used for control messages, those will not have
a netdev pointer in dp.  Skip XDP rxq handling on those rings.

Fixes: 7f1c684a8966 ("nfp: setup xdp_rxq_info")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 05e071b3dc5b..104d6c520a52 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -2253,7 +2253,8 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
 	struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
 	struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
 
-	xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
+	if (dp->netdev)
+		xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
 	kfree(rx_ring->rxbufs);
 
 	if (rx_ring->rxds)
@@ -2279,9 +2280,12 @@ nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring)
 {
 	int sz, err;
 
-	err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev, rx_ring->idx);
-	if (err < 0)
-		return err;
+	if (dp->netdev) {
+		err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev,
+				       rx_ring->idx);
+		if (err < 0)
+			return err;
+	}
 
 	rx_ring->cnt = dp->rxd_cnt;
 	rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt;
-- 
cgit v1.2.3


From 8c6a6d98044dca7e54bcc108da1d8e47b409ec6a Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:25:55 +0000
Subject: nfp: fix incumbent kdoc warnings

We should use % instead of @ for documenting preprocessor defines.
Add missing documentation of __NFP_REPR_TYPE_MAX.  This gets rid
of all remaining kdoc warnings in the driver.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 111 +++++++++++-----------
 drivers/net/ethernet/netronome/nfp/nfp_net_repr.h |   1 +
 2 files changed, 57 insertions(+), 55 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
index 782d452e0fc2..25c36001bffa 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
@@ -91,23 +91,24 @@
 #define NFP_NET_RSS_IPV6_EX_UDP         9
 
 /**
- * @NFP_NET_TXR_MAX:         Maximum number of TX rings
- * @NFP_NET_RXR_MAX:         Maximum number of RX rings
+ * Ring counts
+ * %NFP_NET_TXR_MAX:         Maximum number of TX rings
+ * %NFP_NET_RXR_MAX:         Maximum number of RX rings
  */
 #define NFP_NET_TXR_MAX                 64
 #define NFP_NET_RXR_MAX                 64
 
 /**
  * Read/Write config words (0x0000 - 0x002c)
- * @NFP_NET_CFG_CTRL:        Global control
- * @NFP_NET_CFG_UPDATE:      Indicate which fields are updated
- * @NFP_NET_CFG_TXRS_ENABLE: Bitmask of enabled TX rings
- * @NFP_NET_CFG_RXRS_ENABLE: Bitmask of enabled RX rings
- * @NFP_NET_CFG_MTU:         Set MTU size
- * @NFP_NET_CFG_FLBUFSZ:     Set freelist buffer size (must be larger than MTU)
- * @NFP_NET_CFG_EXN:         MSI-X table entry for exceptions
- * @NFP_NET_CFG_LSC:         MSI-X table entry for link state changes
- * @NFP_NET_CFG_MACADDR:     MAC address
+ * %NFP_NET_CFG_CTRL:        Global control
+ * %NFP_NET_CFG_UPDATE:      Indicate which fields are updated
+ * %NFP_NET_CFG_TXRS_ENABLE: Bitmask of enabled TX rings
+ * %NFP_NET_CFG_RXRS_ENABLE: Bitmask of enabled RX rings
+ * %NFP_NET_CFG_MTU:         Set MTU size
+ * %NFP_NET_CFG_FLBUFSZ:     Set freelist buffer size (must be larger than MTU)
+ * %NFP_NET_CFG_EXN:         MSI-X table entry for exceptions
+ * %NFP_NET_CFG_LSC:         MSI-X table entry for link state changes
+ * %NFP_NET_CFG_MACADDR:     MAC address
  *
  * TODO:
  * - define Error details in UPDATE
@@ -176,14 +177,14 @@
 
 /**
  * Read-only words (0x0030 - 0x0050):
- * @NFP_NET_CFG_VERSION:     Firmware version number
- * @NFP_NET_CFG_STS:         Status
- * @NFP_NET_CFG_CAP:         Capabilities (same bits as @NFP_NET_CFG_CTRL)
- * @NFP_NET_CFG_MAX_TXRINGS: Maximum number of TX rings
- * @NFP_NET_CFG_MAX_RXRINGS: Maximum number of RX rings
- * @NFP_NET_CFG_MAX_MTU:     Maximum support MTU
- * @NFP_NET_CFG_START_TXQ:   Start Queue Control Queue to use for TX (PF only)
- * @NFP_NET_CFG_START_RXQ:   Start Queue Control Queue to use for RX (PF only)
+ * %NFP_NET_CFG_VERSION:     Firmware version number
+ * %NFP_NET_CFG_STS:         Status
+ * %NFP_NET_CFG_CAP:         Capabilities (same bits as %NFP_NET_CFG_CTRL)
+ * %NFP_NET_CFG_MAX_TXRINGS: Maximum number of TX rings
+ * %NFP_NET_CFG_MAX_RXRINGS: Maximum number of RX rings
+ * %NFP_NET_CFG_MAX_MTU:     Maximum support MTU
+ * %NFP_NET_CFG_START_TXQ:   Start Queue Control Queue to use for TX (PF only)
+ * %NFP_NET_CFG_START_RXQ:   Start Queue Control Queue to use for RX (PF only)
  *
  * TODO:
  * - define more STS bits
@@ -228,31 +229,31 @@
 
 /**
  * RSS capabilities
- * @NFP_NET_CFG_RSS_CAP_HFUNC:	supported hash functions (same bits as
- *				@NFP_NET_CFG_RSS_HFUNC)
+ * %NFP_NET_CFG_RSS_CAP_HFUNC:	supported hash functions (same bits as
+ *				%NFP_NET_CFG_RSS_HFUNC)
  */
 #define NFP_NET_CFG_RSS_CAP		0x0054
 #define   NFP_NET_CFG_RSS_CAP_HFUNC	  0xff000000
 
 /**
  * VXLAN/UDP encap configuration
- * @NFP_NET_CFG_VXLAN_PORT:	Base address of table of tunnels' UDP dst ports
- * @NFP_NET_CFG_VXLAN_SZ:	Size of the UDP port table in bytes
+ * %NFP_NET_CFG_VXLAN_PORT:	Base address of table of tunnels' UDP dst ports
+ * %NFP_NET_CFG_VXLAN_SZ:	Size of the UDP port table in bytes
  */
 #define NFP_NET_CFG_VXLAN_PORT		0x0060
 #define NFP_NET_CFG_VXLAN_SZ		  0x0008
 
 /**
  * BPF section
- * @NFP_NET_CFG_BPF_ABI:	BPF ABI version
- * @NFP_NET_CFG_BPF_CAP:	BPF capabilities
- * @NFP_NET_CFG_BPF_MAX_LEN:	Maximum size of JITed BPF code in bytes
- * @NFP_NET_CFG_BPF_START:	Offset at which BPF will be loaded
- * @NFP_NET_CFG_BPF_DONE:	Offset to jump to on exit
- * @NFP_NET_CFG_BPF_STACK_SZ:	Total size of stack area in 64B chunks
- * @NFP_NET_CFG_BPF_INL_MTU:	Packet data split offset in 64B chunks
- * @NFP_NET_CFG_BPF_SIZE:	Size of the JITed BPF code in instructions
- * @NFP_NET_CFG_BPF_ADDR:	DMA address of the buffer with JITed BPF code
+ * %NFP_NET_CFG_BPF_ABI:	BPF ABI version
+ * %NFP_NET_CFG_BPF_CAP:	BPF capabilities
+ * %NFP_NET_CFG_BPF_MAX_LEN:	Maximum size of JITed BPF code in bytes
+ * %NFP_NET_CFG_BPF_START:	Offset at which BPF will be loaded
+ * %NFP_NET_CFG_BPF_DONE:	Offset to jump to on exit
+ * %NFP_NET_CFG_BPF_STACK_SZ:	Total size of stack area in 64B chunks
+ * %NFP_NET_CFG_BPF_INL_MTU:	Packet data split offset in 64B chunks
+ * %NFP_NET_CFG_BPF_SIZE:	Size of the JITed BPF code in instructions
+ * %NFP_NET_CFG_BPF_ADDR:	DMA address of the buffer with JITed BPF code
  */
 #define NFP_NET_CFG_BPF_ABI		0x0080
 #define   NFP_NET_BPF_ABI		2
@@ -278,9 +279,9 @@
 /**
  * RSS configuration (0x0100 - 0x01ac):
  * Used only when NFP_NET_CFG_CTRL_RSS is enabled
- * @NFP_NET_CFG_RSS_CFG:     RSS configuration word
- * @NFP_NET_CFG_RSS_KEY:     RSS "secret" key
- * @NFP_NET_CFG_RSS_ITBL:    RSS indirection table
+ * %NFP_NET_CFG_RSS_CFG:     RSS configuration word
+ * %NFP_NET_CFG_RSS_KEY:     RSS "secret" key
+ * %NFP_NET_CFG_RSS_ITBL:    RSS indirection table
  */
 #define NFP_NET_CFG_RSS_BASE            0x0100
 #define NFP_NET_CFG_RSS_CTRL            NFP_NET_CFG_RSS_BASE
@@ -305,13 +306,13 @@
 
 /**
  * TX ring configuration (0x200 - 0x800)
- * @NFP_NET_CFG_TXR_BASE:    Base offset for TX ring configuration
- * @NFP_NET_CFG_TXR_ADDR:    Per TX ring DMA address (8B entries)
- * @NFP_NET_CFG_TXR_WB_ADDR: Per TX ring write back DMA address (8B entries)
- * @NFP_NET_CFG_TXR_SZ:      Per TX ring ring size (1B entries)
- * @NFP_NET_CFG_TXR_VEC:     Per TX ring MSI-X table entry (1B entries)
- * @NFP_NET_CFG_TXR_PRIO:    Per TX ring priority (1B entries)
- * @NFP_NET_CFG_TXR_IRQ_MOD: Per TX ring interrupt moderation packet
+ * %NFP_NET_CFG_TXR_BASE:    Base offset for TX ring configuration
+ * %NFP_NET_CFG_TXR_ADDR:    Per TX ring DMA address (8B entries)
+ * %NFP_NET_CFG_TXR_WB_ADDR: Per TX ring write back DMA address (8B entries)
+ * %NFP_NET_CFG_TXR_SZ:      Per TX ring ring size (1B entries)
+ * %NFP_NET_CFG_TXR_VEC:     Per TX ring MSI-X table entry (1B entries)
+ * %NFP_NET_CFG_TXR_PRIO:    Per TX ring priority (1B entries)
+ * %NFP_NET_CFG_TXR_IRQ_MOD: Per TX ring interrupt moderation packet
  */
 #define NFP_NET_CFG_TXR_BASE            0x0200
 #define NFP_NET_CFG_TXR_ADDR(_x)        (NFP_NET_CFG_TXR_BASE + ((_x) * 0x8))
@@ -325,12 +326,12 @@
 
 /**
  * RX ring configuration (0x0800 - 0x0c00)
- * @NFP_NET_CFG_RXR_BASE:    Base offset for RX ring configuration
- * @NFP_NET_CFG_RXR_ADDR:    Per RX ring DMA address (8B entries)
- * @NFP_NET_CFG_RXR_SZ:      Per RX ring ring size (1B entries)
- * @NFP_NET_CFG_RXR_VEC:     Per RX ring MSI-X table entry (1B entries)
- * @NFP_NET_CFG_RXR_PRIO:    Per RX ring priority (1B entries)
- * @NFP_NET_CFG_RXR_IRQ_MOD: Per RX ring interrupt moderation (4B entries)
+ * %NFP_NET_CFG_RXR_BASE:    Base offset for RX ring configuration
+ * %NFP_NET_CFG_RXR_ADDR:    Per RX ring DMA address (8B entries)
+ * %NFP_NET_CFG_RXR_SZ:      Per RX ring ring size (1B entries)
+ * %NFP_NET_CFG_RXR_VEC:     Per RX ring MSI-X table entry (1B entries)
+ * %NFP_NET_CFG_RXR_PRIO:    Per RX ring priority (1B entries)
+ * %NFP_NET_CFG_RXR_IRQ_MOD: Per RX ring interrupt moderation (4B entries)
  */
 #define NFP_NET_CFG_RXR_BASE            0x0800
 #define NFP_NET_CFG_RXR_ADDR(_x)        (NFP_NET_CFG_RXR_BASE + ((_x) * 0x8))
@@ -343,7 +344,7 @@
 /**
  * Interrupt Control/Cause registers (0x0c00 - 0x0d00)
  * These registers are only used when MSI-X auto-masking is not
- * enabled (@NFP_NET_CFG_CTRL_MSIXAUTO not set).  The array is index
+ * enabled (%NFP_NET_CFG_CTRL_MSIXAUTO not set).  The array is index
  * by MSI-X entry and are 1B in size.  If an entry is zero, the
  * corresponding entry is enabled.  If the FW generates an interrupt,
  * it writes a cause into the corresponding field.  This also masks
@@ -393,8 +394,8 @@
 /**
  * Per ring stats (0x1000 - 0x1800)
  * options, 64bit per entry
- * @NFP_NET_CFG_TXR_STATS:   TX ring statistics (Packet and Byte count)
- * @NFP_NET_CFG_RXR_STATS:   RX ring statistics (Packet and Byte count)
+ * %NFP_NET_CFG_TXR_STATS:   TX ring statistics (Packet and Byte count)
+ * %NFP_NET_CFG_RXR_STATS:   RX ring statistics (Packet and Byte count)
  */
 #define NFP_NET_CFG_TXR_STATS_BASE      0x1000
 #define NFP_NET_CFG_TXR_STATS(_x)       (NFP_NET_CFG_TXR_STATS_BASE + \
@@ -418,10 +419,10 @@
 
 /**
  * VLAN filtering using general use mailbox
- * @NFP_NET_CFG_VLAN_FILTER:		Base address of VLAN filter mailbox
- * @NFP_NET_CFG_VLAN_FILTER_VID:	VLAN ID to filter
- * @NFP_NET_CFG_VLAN_FILTER_PROTO:	VLAN proto to filter
- * @NFP_NET_CFG_VXLAN_SZ:		Size of the VLAN filter mailbox in bytes
+ * %NFP_NET_CFG_VLAN_FILTER:		Base address of VLAN filter mailbox
+ * %NFP_NET_CFG_VLAN_FILTER_VID:	VLAN ID to filter
+ * %NFP_NET_CFG_VLAN_FILTER_PROTO:	VLAN proto to filter
+ * %NFP_NET_CFG_VXLAN_SZ:		Size of the VLAN filter mailbox in bytes
  */
 #define NFP_NET_CFG_VLAN_FILTER		NFP_NET_CFG_MBOX_VAL
 #define  NFP_NET_CFG_VLAN_FILTER_VID	NFP_NET_CFG_VLAN_FILTER
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
index 5d4d897bc9c6..cbc7badf40a0 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
@@ -89,6 +89,7 @@ struct nfp_repr {
  * @NFP_REPR_TYPE_PHYS_PORT:	external NIC port
  * @NFP_REPR_TYPE_PF:		physical function
  * @NFP_REPR_TYPE_VF:		virtual function
+ * @__NFP_REPR_TYPE_MAX:	number of representor types
  */
 enum nfp_repr_type {
 	NFP_REPR_TYPE_PHYS_PORT,
-- 
cgit v1.2.3


From c4f7730be580f8c39decc058246a83ddf7d7b3cb Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:25:56 +0000
Subject: nfp: bpf: round up the size of the stack

Kernel enforces the alignment of the bottom of the stack, NFP
deals with positive offsets better so we should align the top
of the stack.  Round the stack size to NFP word size (4B).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/offload.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
index fa2905e67b07..8dbf13450bab 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
@@ -147,7 +147,7 @@ int nfp_bpf_translate(struct nfp_app *app, struct nfp_net *nn,
 		return -EOPNOTSUPP;
 	}
 
-	nfp_prog->stack_depth = prog->aux->stack_depth;
+	nfp_prog->stack_depth = round_up(prog->aux->stack_depth, 4);
 	nfp_prog->start_off = nn_readw(nn, NFP_NET_CFG_BPF_START);
 	nfp_prog->tgt_done = nn_readw(nn, NFP_NET_CFG_BPF_DONE);
 
-- 
cgit v1.2.3


From ccbdc596f4f6f6795956d46bb4b5f58c7e4bc3c8 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:25:57 +0000
Subject: nfp: bpf: don't allow changing MTU above BPF offload limit when
 active

When BPF offload is active we need may need to restrict the MTU
changes more than just to the limitation of the kernel XDP datapath.
Allow the BPF code to veto a MTU change.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/main.c       | 20 ++++++++++++++++++++
 drivers/net/ethernet/netronome/nfp/nfp_app.h        | 13 +++++++++++++
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c |  5 +++++
 drivers/net/ethernet/netronome/nfp/nfp_net_repr.c   |  8 ++++++++
 4 files changed, 46 insertions(+)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c
index 4b63167906ca..978086580ca0 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c
@@ -194,6 +194,24 @@ static bool nfp_bpf_tc_busy(struct nfp_app *app, struct nfp_net *nn)
 	return nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF;
 }
 
+static int
+nfp_bpf_change_mtu(struct nfp_app *app, struct net_device *netdev, int new_mtu)
+{
+	struct nfp_net *nn = netdev_priv(netdev);
+	unsigned int max_mtu;
+
+	if (~nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF)
+		return 0;
+
+	max_mtu = nn_readb(nn, NFP_NET_CFG_BPF_INL_MTU) * 64 - 32;
+	if (new_mtu > max_mtu) {
+		nn_info(nn, "BPF offload active, MTU over %u not supported\n",
+			max_mtu);
+		return -EBUSY;
+	}
+	return 0;
+}
+
 static int
 nfp_bpf_parse_cap_adjust_head(struct nfp_app_bpf *bpf, void __iomem *value,
 			      u32 length)
@@ -311,6 +329,8 @@ const struct nfp_app_type app_bpf = {
 	.init		= nfp_bpf_init,
 	.clean		= nfp_bpf_clean,
 
+	.change_mtu	= nfp_bpf_change_mtu,
+
 	.extra_cap	= nfp_bpf_extra_cap,
 
 	.vnic_alloc	= nfp_bpf_vnic_alloc,
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.h b/drivers/net/ethernet/netronome/nfp/nfp_app.h
index 3af1943a8521..e6b59c28c4ca 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_app.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_app.h
@@ -82,6 +82,8 @@ extern const struct nfp_app_type app_flower;
  * @repr_clean:	representor about to be unregistered
  * @repr_open:	representor netdev open callback
  * @repr_stop:	representor netdev stop callback
+ * @change_mtu:	MTU change on a netdev has been requested (veto-only, change
+ *		is not guaranteed to be committed)
  * @start:	start application logic
  * @stop:	stop application logic
  * @ctrl_msg_rx:    control message handler
@@ -120,6 +122,9 @@ struct nfp_app_type {
 	int (*repr_open)(struct nfp_app *app, struct nfp_repr *repr);
 	int (*repr_stop)(struct nfp_app *app, struct nfp_repr *repr);
 
+	int (*change_mtu)(struct nfp_app *app, struct net_device *netdev,
+			  int new_mtu);
+
 	int (*start)(struct nfp_app *app);
 	void (*stop)(struct nfp_app *app);
 
@@ -242,6 +247,14 @@ nfp_app_repr_clean(struct nfp_app *app, struct net_device *netdev)
 		app->type->repr_clean(app, netdev);
 }
 
+static inline int
+nfp_app_change_mtu(struct nfp_app *app, struct net_device *netdev, int new_mtu)
+{
+	if (!app || !app->type->change_mtu)
+		return 0;
+	return app->type->change_mtu(app, netdev, new_mtu);
+}
+
 static inline int nfp_app_start(struct nfp_app *app, struct nfp_net *ctrl)
 {
 	app->ctrl = ctrl;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 104d6c520a52..33cbb9b35e68 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -3049,6 +3049,11 @@ static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
 {
 	struct nfp_net *nn = netdev_priv(netdev);
 	struct nfp_net_dp *dp;
+	int err;
+
+	err = nfp_app_change_mtu(nn->app, netdev, new_mtu);
+	if (err)
+		return err;
 
 	dp = nfp_net_clone_dp(nn);
 	if (!dp)
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
index f50aa119570a..317f87cc3cc6 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
@@ -186,6 +186,13 @@ nfp_repr_get_offload_stats(int attr_id, const struct net_device *dev,
 	return -EINVAL;
 }
 
+static int nfp_repr_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	struct nfp_repr *repr = netdev_priv(netdev);
+
+	return nfp_app_change_mtu(repr->app, netdev, new_mtu);
+}
+
 static netdev_tx_t nfp_repr_xmit(struct sk_buff *skb, struct net_device *netdev)
 {
 	struct nfp_repr *repr = netdev_priv(netdev);
@@ -240,6 +247,7 @@ const struct net_device_ops nfp_repr_netdev_ops = {
 	.ndo_open		= nfp_repr_open,
 	.ndo_stop		= nfp_repr_stop,
 	.ndo_start_xmit		= nfp_repr_xmit,
+	.ndo_change_mtu		= nfp_repr_change_mtu,
 	.ndo_get_stats64	= nfp_repr_get_stats64,
 	.ndo_has_offload_stats	= nfp_repr_has_offload_stats,
 	.ndo_get_offload_stats	= nfp_repr_get_offload_stats,
-- 
cgit v1.2.3


From a0f30c97acb685d391f40c527ddaf542c13966af Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:25:58 +0000
Subject: nfp: bpf: allow disabling TC offloads when XDP active

TC BPF offload was added first, so we used to assume that
the ethtool TC HW offload flag cannot be touched whenever
any BPF program is loaded on the NIC.  This unncessarily
limits changes to the TC flag when offloaded program is XDP.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c
index 978086580ca0..50b16b6cad0b 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c
@@ -191,7 +191,9 @@ static int nfp_bpf_setup_tc(struct nfp_app *app, struct net_device *netdev,
 
 static bool nfp_bpf_tc_busy(struct nfp_app *app, struct nfp_net *nn)
 {
-	return nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF;
+	struct nfp_bpf_vnic *bv = nn->app_priv;
+
+	return !!bv->tc_prog;
 }
 
 static int
-- 
cgit v1.2.3


From 1549921da3e8efb6c95e39444c67ed1729a0ccaf Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:25:59 +0000
Subject: nfp: bpf: move jump resolution to jit.c

Jump target resolution should be in jit.c not offload.c.
No functional changes.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c     | 23 +++++++++++++++++++++++
 drivers/net/ethernet/netronome/nfp/bpf/main.h    |  1 +
 drivers/net/ethernet/netronome/nfp/bpf/offload.c | 18 +-----------------
 3 files changed, 25 insertions(+), 17 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index 0de59f04da84..9caff3a7505a 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -2742,3 +2742,26 @@ int nfp_bpf_jit(struct nfp_prog *nfp_prog)
 
 	return nfp_bpf_ustore_calc(nfp_prog, (__force __le64 *)nfp_prog->prog);
 }
+
+void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt)
+{
+	struct nfp_insn_meta *meta;
+
+	/* Another pass to record jump information. */
+	list_for_each_entry(meta, &nfp_prog->insns, l) {
+		u64 code = meta->insn.code;
+
+		if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT &&
+		    BPF_OP(code) != BPF_CALL) {
+			struct nfp_insn_meta *dst_meta;
+			unsigned short dst_indx;
+
+			dst_indx = meta->n + 1 + meta->insn.off;
+			dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx,
+						     cnt);
+
+			meta->jmp_dst = dst_meta;
+			dst_meta->flags |= FLAG_INSN_IS_JUMP_DST;
+		}
+	}
+}
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h
index 89a9b6393882..0b1347f2afd1 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.h
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h
@@ -236,6 +236,7 @@ struct nfp_bpf_vnic {
 	struct bpf_prog *tc_prog;
 };
 
+void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt);
 int nfp_bpf_jit(struct nfp_prog *prog);
 
 extern const struct bpf_prog_offload_ops nfp_bpf_analyzer_ops;
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
index 8dbf13450bab..0ca6faaacc58 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
@@ -70,23 +70,7 @@ nfp_prog_prepare(struct nfp_prog *nfp_prog, const struct bpf_insn *prog,
 		list_add_tail(&meta->l, &nfp_prog->insns);
 	}
 
-	/* Another pass to record jump information. */
-	list_for_each_entry(meta, &nfp_prog->insns, l) {
-		u64 code = meta->insn.code;
-
-		if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT &&
-		    BPF_OP(code) != BPF_CALL) {
-			struct nfp_insn_meta *dst_meta;
-			unsigned short dst_indx;
-
-			dst_indx = meta->n + 1 + meta->insn.off;
-			dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx,
-						     cnt);
-
-			meta->jmp_dst = dst_meta;
-			dst_meta->flags |= FLAG_INSN_IS_JUMP_DST;
-		}
-	}
+	nfp_bpf_jit_prepare(nfp_prog, cnt);
 
 	return 0;
 }
-- 
cgit v1.2.3


From 488feeaf6d2f9189bdb65f31094a8cff5fcd6c58 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:26:00 +0000
Subject: nfp: bpf: add helpers for modifying branch addresses

In preparation for better handling of relocations move existing
helper for setting branch offset to nfp_asm.c and add two more.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c | 12 -----------
 drivers/net/ethernet/netronome/nfp/nfp_asm.c | 30 ++++++++++++++++++++++++++++
 drivers/net/ethernet/netronome/nfp/nfp_asm.h |  4 ++++
 3 files changed, 34 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index 9caff3a7505a..c5d1628a5414 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -2110,18 +2110,6 @@ static const instr_cb_t instr_cb[256] = {
 	[BPF_JMP | BPF_EXIT] =		goto_out,
 };
 
-/* --- Misc code --- */
-static void br_set_offset(u64 *instr, u16 offset)
-{
-	u16 addr_lo, addr_hi;
-
-	addr_lo = offset & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO));
-	addr_hi = offset != addr_lo;
-	*instr &= ~(OP_BR_ADDR_HI | OP_BR_ADDR_LO);
-	*instr |= FIELD_PREP(OP_BR_ADDR_HI, addr_hi);
-	*instr |= FIELD_PREP(OP_BR_ADDR_LO, addr_lo);
-}
-
 /* --- Assembler logic --- */
 static int nfp_fixup_branches(struct nfp_prog *nfp_prog)
 {
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.c b/drivers/net/ethernet/netronome/nfp/nfp_asm.c
index d3610987fb07..9ee3a3f60cc7 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_asm.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.c
@@ -50,6 +50,36 @@ const struct cmd_tgt_act cmd_tgt_act[__CMD_TGT_MAP_SIZE] = {
 	[CMD_TGT_READ_SWAP_LE] =	{ 0x03, 0x40 },
 };
 
+u16 br_get_offset(u64 instr)
+{
+	u16 addr_lo, addr_hi;
+
+	addr_lo = FIELD_GET(OP_BR_ADDR_LO, instr);
+	addr_hi = FIELD_GET(OP_BR_ADDR_HI, instr);
+
+	return (addr_hi * ((OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)) + 1)) |
+		addr_lo;
+}
+
+void br_set_offset(u64 *instr, u16 offset)
+{
+	u16 addr_lo, addr_hi;
+
+	addr_lo = offset & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO));
+	addr_hi = offset != addr_lo;
+	*instr &= ~(OP_BR_ADDR_HI | OP_BR_ADDR_LO);
+	*instr |= FIELD_PREP(OP_BR_ADDR_HI, addr_hi);
+	*instr |= FIELD_PREP(OP_BR_ADDR_LO, addr_lo);
+}
+
+void br_add_offset(u64 *instr, u16 offset)
+{
+	u16 addr;
+
+	addr = br_get_offset(*instr);
+	br_set_offset(instr, addr + offset);
+}
+
 static u16 nfp_swreg_to_unreg(swreg reg, bool is_dst)
 {
 	bool lm_id, lm_dec = false;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.h b/drivers/net/ethernet/netronome/nfp/nfp_asm.h
index a24daeab1a77..a50240ab0ce2 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_asm.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.h
@@ -93,6 +93,10 @@ enum br_ctx_signal_state {
 	BR_CSS_NONE = 2,
 };
 
+u16 br_get_offset(u64 instr);
+void br_set_offset(u64 *instr, u16 offset);
+void br_add_offset(u64 *instr, u16 offset);
+
 #define OP_BBYTE_BASE		0x0c800000000ULL
 #define OP_BB_A_SRC		0x000000000ffULL
 #define OP_BB_BYTE		0x00000000300ULL
-- 
cgit v1.2.3


From 2314fe9ed0a1760ceab96b81e6b7181963c93254 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:26:01 +0000
Subject: nfp: bpf: relocate jump targets just before the load

Don't translate the program assuming it will be loaded at a given
address.  This will be required for sharing programs between ports
of the same NIC, tail calls and subprograms.  It will also make the
jump targets easier to understand when dumping the program to user
space.

Translate the program as if it was going to be loaded at address
zero.  When load happens add the load offset in and set addresses
of special branches.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c     | 149 ++++++++++++-----------
 drivers/net/ethernet/netronome/nfp/bpf/main.c    |   9 +-
 drivers/net/ethernet/netronome/nfp/bpf/main.h    |  29 +++--
 drivers/net/ethernet/netronome/nfp/bpf/offload.c |  15 ++-
 4 files changed, 115 insertions(+), 87 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index c5d1628a5414..3a5c747fd12b 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -85,7 +85,7 @@ static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn)
 
 static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog)
 {
-	return nfp_prog->start_off + nfp_prog->prog_len;
+	return nfp_prog->prog_len;
 }
 
 static bool
@@ -100,12 +100,6 @@ nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off)
 	return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off);
 }
 
-static unsigned int
-nfp_prog_offset_to_index(struct nfp_prog *nfp_prog, unsigned int offset)
-{
-	return offset - nfp_prog->start_off;
-}
-
 /* --- Emitters --- */
 static void
 __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op,
@@ -195,22 +189,28 @@ __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip,
 	nfp_prog_push(nfp_prog, insn);
 }
 
-static void emit_br_def(struct nfp_prog *nfp_prog, u16 addr, u8 defer)
+static void
+emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer,
+	     enum nfp_relo_type relo)
 {
-	if (defer > 2) {
+	if (mask == BR_UNC && defer > 2) {
 		pr_err("BUG: branch defer out of bounds %d\n", defer);
 		nfp_prog->error = -EFAULT;
 		return;
 	}
-	__emit_br(nfp_prog, BR_UNC, BR_EV_PIP_UNCOND, BR_CSS_NONE, addr, defer);
+
+	__emit_br(nfp_prog, mask,
+		  mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND,
+		  BR_CSS_NONE, addr, defer);
+
+	nfp_prog->prog[nfp_prog->prog_len - 1] |=
+		FIELD_PREP(OP_RELO_TYPE, relo);
 }
 
 static void
 emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer)
 {
-	__emit_br(nfp_prog, mask,
-		  mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND,
-		  BR_CSS_NONE, addr, defer);
+	emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL);
 }
 
 static void
@@ -515,16 +515,6 @@ static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count)
 		emit_nop(nfp_prog);
 }
 
-static void
-wrp_br_special(struct nfp_prog *nfp_prog, enum br_mask mask,
-	       enum br_special special)
-{
-	emit_br(nfp_prog, mask, 0, 0);
-
-	nfp_prog->prog[nfp_prog->prog_len - 1] |=
-		FIELD_PREP(OP_BR_SPECIAL, special);
-}
-
 static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src)
 {
 	emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src);
@@ -749,7 +739,7 @@ construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size)
 		 imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size));
 	emit_alu(nfp_prog, reg_none(),
 		 plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog));
-	wrp_br_special(nfp_prog, BR_BLO, OP_BR_GO_ABORT);
+	emit_br_relo(nfp_prog, BR_BLO, 0, 0, RELO_BR_GO_ABORT);
 
 	/* Load data */
 	return data_ld(nfp_prog, imm_b(nfp_prog), 0, size);
@@ -762,7 +752,7 @@ static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size)
 	/* Check packet length */
 	tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog));
 	emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg);
-	wrp_br_special(nfp_prog, BR_BLO, OP_BR_GO_ABORT);
+	emit_br_relo(nfp_prog, BR_BLO, 0, 0, RELO_BR_GO_ABORT);
 
 	/* Load data */
 	tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog));
@@ -1269,7 +1259,7 @@ static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 	emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0);
 
 	/* Skip over the -EINVAL ret code (defer 2) */
-	emit_br_def(nfp_prog, end, 2);
+	emit_br(nfp_prog, BR_UNC, end, 2);
 
 	emit_alu(nfp_prog, plen_reg(nfp_prog),
 		 plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2));
@@ -2036,7 +2026,7 @@ static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 
 static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 {
-	wrp_br_special(nfp_prog, BR_UNC, OP_BR_GO_OUT);
+	emit_br_relo(nfp_prog, BR_UNC, 0, 0, RELO_BR_GO_OUT);
 
 	return 0;
 }
@@ -2125,11 +2115,9 @@ static int nfp_fixup_branches(struct nfp_prog *nfp_prog)
 			continue;
 
 		if (list_is_last(&meta->l, &nfp_prog->insns))
-			idx = nfp_prog->last_bpf_off;
+			br_idx = nfp_prog->last_bpf_off;
 		else
-			idx = list_next_entry(meta, l)->off - 1;
-
-		br_idx = nfp_prog_offset_to_index(nfp_prog, idx);
+			br_idx = list_next_entry(meta, l)->off - 1;
 
 		if (!nfp_is_br(nfp_prog->prog[br_idx])) {
 			pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n",
@@ -2137,7 +2125,8 @@ static int nfp_fixup_branches(struct nfp_prog *nfp_prog)
 			return -ELOOP;
 		}
 		/* Leave special branches for later */
-		if (FIELD_GET(OP_BR_SPECIAL, nfp_prog->prog[br_idx]))
+		if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) !=
+		    RELO_BR_REL)
 			continue;
 
 		if (!meta->jmp_dst) {
@@ -2152,38 +2141,13 @@ static int nfp_fixup_branches(struct nfp_prog *nfp_prog)
 			return -ELOOP;
 		}
 
-		for (idx = nfp_prog_offset_to_index(nfp_prog, meta->off);
-		     idx <= br_idx; idx++) {
+		for (idx = meta->off; idx <= br_idx; idx++) {
 			if (!nfp_is_br(nfp_prog->prog[idx]))
 				continue;
 			br_set_offset(&nfp_prog->prog[idx], jmp_dst->off);
 		}
 	}
 
-	/* Fixup 'goto out's separately, they can be scattered around */
-	for (br_idx = 0; br_idx < nfp_prog->prog_len; br_idx++) {
-		enum br_special special;
-
-		if ((nfp_prog->prog[br_idx] & OP_BR_BASE_MASK) != OP_BR_BASE)
-			continue;
-
-		special = FIELD_GET(OP_BR_SPECIAL, nfp_prog->prog[br_idx]);
-		switch (special) {
-		case OP_BR_NORMAL:
-			break;
-		case OP_BR_GO_OUT:
-			br_set_offset(&nfp_prog->prog[br_idx],
-				      nfp_prog->tgt_out);
-			break;
-		case OP_BR_GO_ABORT:
-			br_set_offset(&nfp_prog->prog[br_idx],
-				      nfp_prog->tgt_abort);
-			break;
-		}
-
-		nfp_prog->prog[br_idx] &= ~OP_BR_SPECIAL;
-	}
-
 	return 0;
 }
 
@@ -2211,7 +2175,7 @@ static void nfp_outro_tc_da(struct nfp_prog *nfp_prog)
 	/* Target for aborts */
 	nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog);
 
-	emit_br_def(nfp_prog, nfp_prog->tgt_done, 2);
+	emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT);
 
 	wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS);
 	emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16);
@@ -2238,7 +2202,7 @@ static void nfp_outro_tc_da(struct nfp_prog *nfp_prog)
 	emit_shf(nfp_prog, reg_b(2),
 		 reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0);
 
-	emit_br_def(nfp_prog, nfp_prog->tgt_done, 2);
+	emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT);
 
 	emit_shf(nfp_prog, reg_b(2),
 		 reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4);
@@ -2257,7 +2221,7 @@ static void nfp_outro_xdp(struct nfp_prog *nfp_prog)
 	/* Target for aborts */
 	nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog);
 
-	emit_br_def(nfp_prog, nfp_prog->tgt_done, 2);
+	emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT);
 
 	wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS);
 	emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16);
@@ -2278,7 +2242,7 @@ static void nfp_outro_xdp(struct nfp_prog *nfp_prog)
 	emit_shf(nfp_prog, reg_b(2),
 		 reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0);
 
-	emit_br_def(nfp_prog, nfp_prog->tgt_done, 2);
+	emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT);
 
 	wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS);
 	emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16);
@@ -2694,20 +2658,19 @@ static int nfp_bpf_optimize(struct nfp_prog *nfp_prog)
 	return 0;
 }
 
-static int nfp_bpf_ustore_calc(struct nfp_prog *nfp_prog, __le64 *ustore)
+static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len)
 {
+	__le64 *ustore = (__force __le64 *)prog;
 	int i;
 
-	for (i = 0; i < nfp_prog->prog_len; i++) {
+	for (i = 0; i < len; i++) {
 		int err;
 
-		err = nfp_ustore_check_valid_no_ecc(nfp_prog->prog[i]);
+		err = nfp_ustore_check_valid_no_ecc(prog[i]);
 		if (err)
 			return err;
 
-		nfp_prog->prog[i] = nfp_ustore_calc_ecc_insn(nfp_prog->prog[i]);
-
-		ustore[i] = cpu_to_le64(nfp_prog->prog[i]);
+		ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i]));
 	}
 
 	return 0;
@@ -2728,7 +2691,7 @@ int nfp_bpf_jit(struct nfp_prog *nfp_prog)
 		return -EINVAL;
 	}
 
-	return nfp_bpf_ustore_calc(nfp_prog, (__force __le64 *)nfp_prog->prog);
+	return ret;
 }
 
 void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt)
@@ -2753,3 +2716,51 @@ void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt)
 		}
 	}
 }
+
+void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv)
+{
+	unsigned int i;
+	u64 *prog;
+	int err;
+
+	prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64),
+		       GFP_KERNEL);
+	if (!prog)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < nfp_prog->prog_len; i++) {
+		enum nfp_relo_type special;
+
+		special = FIELD_GET(OP_RELO_TYPE, prog[i]);
+		switch (special) {
+		case RELO_NONE:
+			continue;
+		case RELO_BR_REL:
+			br_add_offset(&prog[i], bv->start_off);
+			break;
+		case RELO_BR_GO_OUT:
+			br_set_offset(&prog[i],
+				      nfp_prog->tgt_out + bv->start_off);
+			break;
+		case RELO_BR_GO_ABORT:
+			br_set_offset(&prog[i],
+				      nfp_prog->tgt_abort + bv->start_off);
+			break;
+		case RELO_BR_NEXT_PKT:
+			br_set_offset(&prog[i], bv->tgt_done);
+			break;
+		}
+
+		prog[i] &= ~OP_RELO_TYPE;
+	}
+
+	err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len);
+	if (err)
+		goto err_free_prog;
+
+	return prog;
+
+err_free_prog:
+	kfree(prog);
+	return ERR_PTR(err);
+}
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c
index 50b16b6cad0b..9ed76ccdd3c1 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c
@@ -87,16 +87,21 @@ static const char *nfp_bpf_extra_cap(struct nfp_app *app, struct nfp_net *nn)
 static int
 nfp_bpf_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
 {
+	struct nfp_bpf_vnic *bv;
 	int err;
 
-	nn->app_priv = kzalloc(sizeof(struct nfp_bpf_vnic), GFP_KERNEL);
-	if (!nn->app_priv)
+	bv = kzalloc(sizeof(*bv), GFP_KERNEL);
+	if (!bv)
 		return -ENOMEM;
+	nn->app_priv = bv;
 
 	err = nfp_app_nic_vnic_alloc(app, nn, id);
 	if (err)
 		goto err_free_priv;
 
+	bv->start_off = nn_readw(nn, NFP_NET_CFG_BPF_START);
+	bv->tgt_done = nn_readw(nn, NFP_NET_CFG_BPF_DONE);
+
 	return 0;
 err_free_priv:
 	kfree(nn->app_priv);
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h
index 0b1347f2afd1..5deba5099618 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.h
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h
@@ -42,15 +42,20 @@
 
 #include "../nfp_asm.h"
 
-/* For branch fixup logic use up-most byte of branch instruction as scratch
+/* For relocation logic use up-most byte of branch instruction as scratch
  * area.  Remember to clear this before sending instructions to HW!
  */
-#define OP_BR_SPECIAL	0xff00000000000000ULL
-
-enum br_special {
-	OP_BR_NORMAL = 0,
-	OP_BR_GO_OUT,
-	OP_BR_GO_ABORT,
+#define OP_RELO_TYPE	0xff00000000000000ULL
+
+enum nfp_relo_type {
+	RELO_NONE = 0,
+	/* standard internal jumps */
+	RELO_BR_REL,
+	/* internal jumps to parts of the outro */
+	RELO_BR_GO_OUT,
+	RELO_BR_GO_ABORT,
+	/* external jumps to fixed addresses */
+	RELO_BR_NEXT_PKT,
 };
 
 enum static_regs {
@@ -191,11 +196,9 @@ static inline bool is_mbpf_store(const struct nfp_insn_meta *meta)
  * @__prog_alloc_len: alloc size of @prog array
  * @verifier_meta: temporary storage for verifier's insn meta
  * @type: BPF program type
- * @start_off: address of the first instruction in the memory
  * @last_bpf_off: address of the last instruction translated from BPF
  * @tgt_out: jump target for normal exit
  * @tgt_abort: jump target for abort (e.g. access outside of packet buffer)
- * @tgt_done: jump target to get the next packet
  * @n_translated: number of successfully translated instructions (for errors)
  * @error: error code if something went wrong
  * @stack_depth: max stack depth from the verifier
@@ -213,11 +216,9 @@ struct nfp_prog {
 
 	enum bpf_prog_type type;
 
-	unsigned int start_off;
 	unsigned int last_bpf_off;
 	unsigned int tgt_out;
 	unsigned int tgt_abort;
-	unsigned int tgt_done;
 
 	unsigned int n_translated;
 	int error;
@@ -231,9 +232,13 @@ struct nfp_prog {
 /**
  * struct nfp_bpf_vnic - per-vNIC BPF priv structure
  * @tc_prog:	currently loaded cls_bpf program
+ * @start_off:	address of the first instruction in the memory
+ * @tgt_done:	jump target to get the next packet
  */
 struct nfp_bpf_vnic {
 	struct bpf_prog *tc_prog;
+	unsigned int start_off;
+	unsigned int tgt_done;
 };
 
 void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt);
@@ -257,4 +262,6 @@ int nfp_bpf_destroy(struct nfp_app *app, struct nfp_net *nn,
 struct nfp_insn_meta *
 nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta,
 		  unsigned int insn_idx, unsigned int n_insns);
+
+void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv);
 #endif
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
index 0ca6faaacc58..5f165e1d7648 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
@@ -130,10 +130,7 @@ int nfp_bpf_translate(struct nfp_app *app, struct nfp_net *nn,
 			prog->aux->stack_depth, stack_size);
 		return -EOPNOTSUPP;
 	}
-
 	nfp_prog->stack_depth = round_up(prog->aux->stack_depth, 4);
-	nfp_prog->start_off = nn_readw(nn, NFP_NET_CFG_BPF_START);
-	nfp_prog->tgt_done = nn_readw(nn, NFP_NET_CFG_BPF_DONE);
 
 	max_instr = nn_readw(nn, NFP_NET_CFG_BPF_MAX_LEN);
 	nfp_prog->__prog_alloc_len = max_instr * sizeof(u64);
@@ -161,6 +158,7 @@ static int nfp_net_bpf_load(struct nfp_net *nn, struct bpf_prog *prog)
 	struct nfp_prog *nfp_prog = prog->aux->offload->dev_priv;
 	unsigned int max_mtu;
 	dma_addr_t dma_addr;
+	void *img;
 	int err;
 
 	max_mtu = nn_readb(nn, NFP_NET_CFG_BPF_INL_MTU) * 64 - 32;
@@ -169,11 +167,17 @@ static int nfp_net_bpf_load(struct nfp_net *nn, struct bpf_prog *prog)
 		return -EOPNOTSUPP;
 	}
 
-	dma_addr = dma_map_single(nn->dp.dev, nfp_prog->prog,
+	img = nfp_bpf_relo_for_vnic(nfp_prog, nn->app_priv);
+	if (IS_ERR(img))
+		return PTR_ERR(img);
+
+	dma_addr = dma_map_single(nn->dp.dev, img,
 				  nfp_prog->prog_len * sizeof(u64),
 				  DMA_TO_DEVICE);
-	if (dma_mapping_error(nn->dp.dev, dma_addr))
+	if (dma_mapping_error(nn->dp.dev, dma_addr)) {
+		kfree(img);
 		return -ENOMEM;
+	}
 
 	nn_writew(nn, NFP_NET_CFG_BPF_SIZE, nfp_prog->prog_len);
 	nn_writeq(nn, NFP_NET_CFG_BPF_ADDR, dma_addr);
@@ -185,6 +189,7 @@ static int nfp_net_bpf_load(struct nfp_net *nn, struct bpf_prog *prog)
 
 	dma_unmap_single(nn->dp.dev, dma_addr, nfp_prog->prog_len * sizeof(u64),
 			 DMA_TO_DEVICE);
+	kfree(img);
 
 	return err;
 }
-- 
cgit v1.2.3


From 44a12ecc1cab7dcf4647dfef7d94f5c559c01407 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:26:02 +0000
Subject: nfp: bpf: don't depend on high order allocations for program image

The translator pre-allocates a buffer of maximal program size.
Due to HW/FW limitations the program buffer can't currently be
longer than 128Kb, so we used to kmalloc() it, and then map for
DMA directly.

Now that the late branch resolution is copying the program image
anyway, we can just kvmalloc() the buffer.  While at it, after
translation reallocate the buffer to save space.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c     | 16 ++++++++++++++++
 drivers/net/ethernet/netronome/nfp/bpf/offload.c |  5 +++--
 2 files changed, 19 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index 3a5c747fd12b..5deebbc18cfd 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -2676,6 +2676,20 @@ static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len)
 	return 0;
 }
 
+static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog)
+{
+	void *prog;
+
+	prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL);
+	if (!prog)
+		return;
+
+	nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64);
+	memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len);
+	kvfree(nfp_prog->prog);
+	nfp_prog->prog = prog;
+}
+
 int nfp_bpf_jit(struct nfp_prog *nfp_prog)
 {
 	int ret;
@@ -2691,6 +2705,8 @@ int nfp_bpf_jit(struct nfp_prog *nfp_prog)
 		return -EINVAL;
 	}
 
+	nfp_bpf_prog_trim(nfp_prog);
+
 	return ret;
 }
 
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
index 5f165e1d7648..f63560550753 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
@@ -42,6 +42,7 @@
 #include <linux/jiffies.h>
 #include <linux/timer.h>
 #include <linux/list.h>
+#include <linux/mm.h>
 
 #include <net/pkt_cls.h>
 #include <net/tc_act/tc_gact.h>
@@ -135,7 +136,7 @@ int nfp_bpf_translate(struct nfp_app *app, struct nfp_net *nn,
 	max_instr = nn_readw(nn, NFP_NET_CFG_BPF_MAX_LEN);
 	nfp_prog->__prog_alloc_len = max_instr * sizeof(u64);
 
-	nfp_prog->prog = kmalloc(nfp_prog->__prog_alloc_len, GFP_KERNEL);
+	nfp_prog->prog = kvmalloc(nfp_prog->__prog_alloc_len, GFP_KERNEL);
 	if (!nfp_prog->prog)
 		return -ENOMEM;
 
@@ -147,7 +148,7 @@ int nfp_bpf_destroy(struct nfp_app *app, struct nfp_net *nn,
 {
 	struct nfp_prog *nfp_prog = prog->aux->offload->dev_priv;
 
-	kfree(nfp_prog->prog);
+	kvfree(nfp_prog->prog);
 	nfp_prog_free(nfp_prog);
 
 	return 0;
-- 
cgit v1.2.3


From e84797fe159c8f849edd96ab72cc21eb890656fe Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:26:03 +0000
Subject: nfp: bpf: use a large constant in unresolved branches

To make absolute relocated branches (branches which will be completely
rewritten with br_set_offset()) distinguishable in user space dumps
from normal jumps add a large offset to them.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c  | 14 +++++++-------
 drivers/net/ethernet/netronome/nfp/bpf/main.h |  6 ++++++
 2 files changed, 13 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index 5deebbc18cfd..b4ed6bca4ea9 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -739,7 +739,7 @@ construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size)
 		 imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size));
 	emit_alu(nfp_prog, reg_none(),
 		 plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog));
-	emit_br_relo(nfp_prog, BR_BLO, 0, 0, RELO_BR_GO_ABORT);
+	emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT);
 
 	/* Load data */
 	return data_ld(nfp_prog, imm_b(nfp_prog), 0, size);
@@ -752,7 +752,7 @@ static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size)
 	/* Check packet length */
 	tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog));
 	emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg);
-	emit_br_relo(nfp_prog, BR_BLO, 0, 0, RELO_BR_GO_ABORT);
+	emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT);
 
 	/* Load data */
 	tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog));
@@ -2026,7 +2026,7 @@ static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 
 static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 {
-	emit_br_relo(nfp_prog, BR_UNC, 0, 0, RELO_BR_GO_OUT);
+	emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT);
 
 	return 0;
 }
@@ -2175,7 +2175,7 @@ static void nfp_outro_tc_da(struct nfp_prog *nfp_prog)
 	/* Target for aborts */
 	nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog);
 
-	emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT);
+	emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT);
 
 	wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS);
 	emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16);
@@ -2202,7 +2202,7 @@ static void nfp_outro_tc_da(struct nfp_prog *nfp_prog)
 	emit_shf(nfp_prog, reg_b(2),
 		 reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0);
 
-	emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT);
+	emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT);
 
 	emit_shf(nfp_prog, reg_b(2),
 		 reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4);
@@ -2221,7 +2221,7 @@ static void nfp_outro_xdp(struct nfp_prog *nfp_prog)
 	/* Target for aborts */
 	nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog);
 
-	emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT);
+	emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT);
 
 	wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS);
 	emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16);
@@ -2242,7 +2242,7 @@ static void nfp_outro_xdp(struct nfp_prog *nfp_prog)
 	emit_shf(nfp_prog, reg_b(2),
 		 reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0);
 
-	emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT);
+	emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT);
 
 	wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS);
 	emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16);
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h
index 5deba5099618..8d02c39b9b10 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.h
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h
@@ -58,6 +58,12 @@ enum nfp_relo_type {
 	RELO_BR_NEXT_PKT,
 };
 
+/* To make absolute relocated branches (branches other than RELO_BR_REL)
+ * distinguishable in user space dumps from normal jumps, add a large offset
+ * to them.
+ */
+#define BR_OFF_RELO		15000
+
 enum static_regs {
 	STATIC_REG_IMM		= 21, /* Bank AB */
 	STATIC_REG_STACK	= 22, /* Bank A */
-- 
cgit v1.2.3


From af93d15ac6c40d097b08c18a65a0414f94110401 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 10 Jan 2018 12:26:04 +0000
Subject: nfp: hand over to BPF offload app at coarser granularity

Instead of having an app callback per message type hand off
all offload-related handling to apps with one "rest of ndo_bpf"
callback.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/main.c      |  5 +--
 drivers/net/ethernet/netronome/nfp/bpf/main.h      |  8 +---
 drivers/net/ethernet/netronome/nfp/bpf/offload.c   | 25 +++++++++---
 drivers/net/ethernet/netronome/nfp/nfp_app.h       | 47 +++++-----------------
 .../net/ethernet/netronome/nfp/nfp_net_common.c    | 10 +----
 5 files changed, 34 insertions(+), 61 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c
index 9ed76ccdd3c1..e8cfe300c8c4 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c
@@ -345,9 +345,6 @@ const struct nfp_app_type app_bpf = {
 
 	.setup_tc	= nfp_bpf_setup_tc,
 	.tc_busy	= nfp_bpf_tc_busy,
+	.bpf		= nfp_ndo_bpf,
 	.xdp_offload	= nfp_bpf_xdp_offload,
-
-	.bpf_verifier_prep	= nfp_bpf_verifier_prep,
-	.bpf_translate		= nfp_bpf_translate,
-	.bpf_destroy		= nfp_bpf_destroy,
 };
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h
index 8d02c39b9b10..66381afee2a9 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.h
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h
@@ -256,15 +256,11 @@ struct netdev_bpf;
 struct nfp_app;
 struct nfp_net;
 
+int nfp_ndo_bpf(struct nfp_app *app, struct nfp_net *nn,
+		struct netdev_bpf *bpf);
 int nfp_net_bpf_offload(struct nfp_net *nn, struct bpf_prog *prog,
 			bool old_prog);
 
-int nfp_bpf_verifier_prep(struct nfp_app *app, struct nfp_net *nn,
-			  struct netdev_bpf *bpf);
-int nfp_bpf_translate(struct nfp_app *app, struct nfp_net *nn,
-		      struct bpf_prog *prog);
-int nfp_bpf_destroy(struct nfp_app *app, struct nfp_net *nn,
-		    struct bpf_prog *prog);
 struct nfp_insn_meta *
 nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta,
 		  unsigned int insn_idx, unsigned int n_insns);
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
index f63560550753..320b2250d29a 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
@@ -87,8 +87,9 @@ static void nfp_prog_free(struct nfp_prog *nfp_prog)
 	kfree(nfp_prog);
 }
 
-int nfp_bpf_verifier_prep(struct nfp_app *app, struct nfp_net *nn,
-			  struct netdev_bpf *bpf)
+static int
+nfp_bpf_verifier_prep(struct nfp_app *app, struct nfp_net *nn,
+		      struct netdev_bpf *bpf)
 {
 	struct bpf_prog *prog = bpf->verifier.prog;
 	struct nfp_prog *nfp_prog;
@@ -118,8 +119,7 @@ err_free:
 	return ret;
 }
 
-int nfp_bpf_translate(struct nfp_app *app, struct nfp_net *nn,
-		      struct bpf_prog *prog)
+static int nfp_bpf_translate(struct nfp_net *nn, struct bpf_prog *prog)
 {
 	struct nfp_prog *nfp_prog = prog->aux->offload->dev_priv;
 	unsigned int stack_size;
@@ -143,8 +143,7 @@ int nfp_bpf_translate(struct nfp_app *app, struct nfp_net *nn,
 	return nfp_bpf_jit(nfp_prog);
 }
 
-int nfp_bpf_destroy(struct nfp_app *app, struct nfp_net *nn,
-		    struct bpf_prog *prog)
+static int nfp_bpf_destroy(struct nfp_net *nn, struct bpf_prog *prog)
 {
 	struct nfp_prog *nfp_prog = prog->aux->offload->dev_priv;
 
@@ -154,6 +153,20 @@ int nfp_bpf_destroy(struct nfp_app *app, struct nfp_net *nn,
 	return 0;
 }
 
+int nfp_ndo_bpf(struct nfp_app *app, struct nfp_net *nn, struct netdev_bpf *bpf)
+{
+	switch (bpf->command) {
+	case BPF_OFFLOAD_VERIFIER_PREP:
+		return nfp_bpf_verifier_prep(app, nn, bpf);
+	case BPF_OFFLOAD_TRANSLATE:
+		return nfp_bpf_translate(nn, bpf->offload.prog);
+	case BPF_OFFLOAD_DESTROY:
+		return nfp_bpf_destroy(nn, bpf->offload.prog);
+	default:
+		return -EINVAL;
+	}
+}
+
 static int nfp_net_bpf_load(struct nfp_net *nn, struct bpf_prog *prog)
 {
 	struct nfp_prog *nfp_prog = prog->aux->offload->dev_priv;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.h b/drivers/net/ethernet/netronome/nfp/nfp_app.h
index e6b59c28c4ca..32ff46a00f70 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_app.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_app.h
@@ -89,10 +89,8 @@ extern const struct nfp_app_type app_flower;
  * @ctrl_msg_rx:    control message handler
  * @setup_tc:	setup TC ndo
  * @tc_busy:	TC HW offload busy (rules loaded)
+ * @bpf:	BPF ndo offload-related calls
  * @xdp_offload:    offload an XDP program
- * @bpf_verifier_prep:	verifier prep for dev-specific BPF programs
- * @bpf_translate:	translate call for dev-specific BPF programs
- * @bpf_destroy:	destroy for dev-specific BPF programs
  * @eswitch_mode_get:    get SR-IOV eswitch mode
  * @sriov_enable: app-specific sriov initialisation
  * @sriov_disable: app-specific sriov clean-up
@@ -133,14 +131,10 @@ struct nfp_app_type {
 	int (*setup_tc)(struct nfp_app *app, struct net_device *netdev,
 			enum tc_setup_type type, void *type_data);
 	bool (*tc_busy)(struct nfp_app *app, struct nfp_net *nn);
+	int (*bpf)(struct nfp_app *app, struct nfp_net *nn,
+		   struct netdev_bpf *xdp);
 	int (*xdp_offload)(struct nfp_app *app, struct nfp_net *nn,
 			   struct bpf_prog *prog);
-	int (*bpf_verifier_prep)(struct nfp_app *app, struct nfp_net *nn,
-				 struct netdev_bpf *bpf);
-	int (*bpf_translate)(struct nfp_app *app, struct nfp_net *nn,
-			     struct bpf_prog *prog);
-	int (*bpf_destroy)(struct nfp_app *app, struct nfp_net *nn,
-			   struct bpf_prog *prog);
 
 	int (*sriov_enable)(struct nfp_app *app, int num_vfs);
 	void (*sriov_disable)(struct nfp_app *app);
@@ -316,6 +310,14 @@ static inline int nfp_app_setup_tc(struct nfp_app *app,
 	return app->type->setup_tc(app, netdev, type, type_data);
 }
 
+static inline int nfp_app_bpf(struct nfp_app *app, struct nfp_net *nn,
+			      struct netdev_bpf *bpf)
+{
+	if (!app || !app->type->bpf)
+		return -EINVAL;
+	return app->type->bpf(app, nn, bpf);
+}
+
 static inline int nfp_app_xdp_offload(struct nfp_app *app, struct nfp_net *nn,
 				      struct bpf_prog *prog)
 {
@@ -324,33 +326,6 @@ static inline int nfp_app_xdp_offload(struct nfp_app *app, struct nfp_net *nn,
 	return app->type->xdp_offload(app, nn, prog);
 }
 
-static inline int
-nfp_app_bpf_verifier_prep(struct nfp_app *app, struct nfp_net *nn,
-			  struct netdev_bpf *bpf)
-{
-	if (!app || !app->type->bpf_verifier_prep)
-		return -EOPNOTSUPP;
-	return app->type->bpf_verifier_prep(app, nn, bpf);
-}
-
-static inline int
-nfp_app_bpf_translate(struct nfp_app *app, struct nfp_net *nn,
-		      struct bpf_prog *prog)
-{
-	if (!app || !app->type->bpf_translate)
-		return -EOPNOTSUPP;
-	return app->type->bpf_translate(app, nn, prog);
-}
-
-static inline int
-nfp_app_bpf_destroy(struct nfp_app *app, struct nfp_net *nn,
-		    struct bpf_prog *prog)
-{
-	if (!app || !app->type->bpf_destroy)
-		return -EOPNOTSUPP;
-	return app->type->bpf_destroy(app, nn, prog);
-}
-
 static inline bool nfp_app_ctrl_tx(struct nfp_app *app, struct sk_buff *skb)
 {
 	trace_devlink_hwmsg(priv_to_devlink(app->pf), false, 0,
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 33cbb9b35e68..caee147fce04 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -3414,16 +3414,8 @@ static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
 		xdp->prog_id = nn->xdp_prog ? nn->xdp_prog->aux->id : 0;
 		xdp->prog_flags = nn->xdp_prog ? nn->xdp_flags : 0;
 		return 0;
-	case BPF_OFFLOAD_VERIFIER_PREP:
-		return nfp_app_bpf_verifier_prep(nn->app, nn, xdp);
-	case BPF_OFFLOAD_TRANSLATE:
-		return nfp_app_bpf_translate(nn->app, nn,
-					     xdp->offload.prog);
-	case BPF_OFFLOAD_DESTROY:
-		return nfp_app_bpf_destroy(nn->app, nn,
-					   xdp->offload.prog);
 	default:
-		return -EINVAL;
+		return nfp_app_bpf(nn->app, nn, xdp);
 	}
 }
 
-- 
cgit v1.2.3


From c087aa8bbf83ddcd54e49f42cf463bcea5bd2b94 Mon Sep 17 00:00:00 2001
From: Nic Viljoen <nick.viljoen@netronome.com>
Date: Wed, 10 Jan 2018 12:26:05 +0000
Subject: nfp: bpf: add signed jump insns

This patch adds signed jump instructions (jsgt, jsge, jslt, jsle)
to the nfp jit. As well as adding the additional required raw
assembler branch mask to nfp_asm.h

Signed-off-by: Nic Viljoen <nick.viljoen@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c | 48 ++++++++++++++++++++++++++++
 drivers/net/ethernet/netronome/nfp/nfp_asm.h |  1 +
 2 files changed, 49 insertions(+)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index b4ed6bca4ea9..47c5224f8d6f 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -1914,6 +1914,26 @@ static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 	return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true);
 }
 
+static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+	return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true);
+}
+
+static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+	return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false);
+}
+
+static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+	return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false);
+}
+
+static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+	return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true);
+}
+
 static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 {
 	const struct bpf_insn *insn = &meta->insn;
@@ -2003,6 +2023,26 @@ static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 	return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true);
 }
 
+static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+	return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true);
+}
+
+static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+	return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false);
+}
+
+static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+	return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false);
+}
+
+static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
+{
+	return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true);
+}
+
 static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 {
 	return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE);
@@ -2087,6 +2127,10 @@ static const instr_cb_t instr_cb[256] = {
 	[BPF_JMP | BPF_JGE | BPF_K] =	jge_imm,
 	[BPF_JMP | BPF_JLT | BPF_K] =	jlt_imm,
 	[BPF_JMP | BPF_JLE | BPF_K] =	jle_imm,
+	[BPF_JMP | BPF_JSGT | BPF_K] =  jsgt_imm,
+	[BPF_JMP | BPF_JSGE | BPF_K] =  jsge_imm,
+	[BPF_JMP | BPF_JSLT | BPF_K] =  jslt_imm,
+	[BPF_JMP | BPF_JSLE | BPF_K] =  jsle_imm,
 	[BPF_JMP | BPF_JSET | BPF_K] =	jset_imm,
 	[BPF_JMP | BPF_JNE | BPF_K] =	jne_imm,
 	[BPF_JMP | BPF_JEQ | BPF_X] =	jeq_reg,
@@ -2094,6 +2138,10 @@ static const instr_cb_t instr_cb[256] = {
 	[BPF_JMP | BPF_JGE | BPF_X] =	jge_reg,
 	[BPF_JMP | BPF_JLT | BPF_X] =	jlt_reg,
 	[BPF_JMP | BPF_JLE | BPF_X] =	jle_reg,
+	[BPF_JMP | BPF_JSGT | BPF_X] =  jsgt_reg,
+	[BPF_JMP | BPF_JSGE | BPF_X] =  jsge_reg,
+	[BPF_JMP | BPF_JSLT | BPF_X] =  jslt_reg,
+	[BPF_JMP | BPF_JSLE | BPF_X] =  jsle_reg,
 	[BPF_JMP | BPF_JSET | BPF_X] =	jset_reg,
 	[BPF_JMP | BPF_JNE | BPF_X] =	jne_reg,
 	[BPF_JMP | BPF_CALL] =		call,
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.h b/drivers/net/ethernet/netronome/nfp/nfp_asm.h
index a50240ab0ce2..20e51cb60e69 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_asm.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.h
@@ -81,6 +81,7 @@ enum br_mask {
 	BR_BHS = 0x04,
 	BR_BLO = 0x05,
 	BR_BGE = 0x08,
+	BR_BLT = 0x09,
 	BR_UNC = 0x18,
 };
 
-- 
cgit v1.2.3


From ff627e3d07a07f7ed1105f459ee9586d4be7818e Mon Sep 17 00:00:00 2001
From: Quentin Monnet <quentin.monnet@netronome.com>
Date: Wed, 10 Jan 2018 12:26:07 +0000
Subject: nfp: bpf: reuse verifier log for debug messages

Now that `bpf_verifier_log_write()` is exported from the verifier and
makes it possible to reuse the verifier log to print messages to the
standard output, use this instead of the kernel logs in the nfp driver
for printing error messages occurring at verification time.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 drivers/net/ethernet/netronome/nfp/bpf/verifier.c | 30 ++++++++++++-----------
 1 file changed, 16 insertions(+), 14 deletions(-)

(limited to 'drivers')

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c
index d8870c2f11f3..7890d95d4018 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c
@@ -31,8 +31,6 @@
  * SOFTWARE.
  */
 
-#define pr_fmt(fmt)	"NFP net bpf: " fmt
-
 #include <linux/bpf.h>
 #include <linux/bpf_verifier.h>
 #include <linux/kernel.h>
@@ -41,6 +39,9 @@
 #include "fw.h"
 #include "main.h"
 
+#define pr_vlog(env, fmt, ...)	\
+	bpf_verifier_log_write(env, "[nfp] " fmt, ##__VA_ARGS__)
+
 struct nfp_insn_meta *
 nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta,
 		  unsigned int insn_idx, unsigned int n_insns)
@@ -116,18 +117,18 @@ nfp_bpf_check_call(struct nfp_prog *nfp_prog, struct bpf_verifier_env *env,
 	switch (func_id) {
 	case BPF_FUNC_xdp_adjust_head:
 		if (!bpf->adjust_head.off_max) {
-			pr_warn("adjust_head not supported by FW\n");
+			pr_vlog(env, "adjust_head not supported by FW\n");
 			return -EOPNOTSUPP;
 		}
 		if (!(bpf->adjust_head.flags & NFP_BPF_ADJUST_HEAD_NO_META)) {
-			pr_warn("adjust_head: FW requires shifting metadata, not supported by the driver\n");
+			pr_vlog(env, "adjust_head: FW requires shifting metadata, not supported by the driver\n");
 			return -EOPNOTSUPP;
 		}
 
 		nfp_record_adjust_head(bpf, nfp_prog, meta, reg2);
 		break;
 	default:
-		pr_warn("unsupported function id: %d\n", func_id);
+		pr_vlog(env, "unsupported function id: %d\n", func_id);
 		return -EOPNOTSUPP;
 	}
 
@@ -150,7 +151,7 @@ nfp_bpf_check_exit(struct nfp_prog *nfp_prog,
 		char tn_buf[48];
 
 		tnum_strn(tn_buf, sizeof(tn_buf), reg0->var_off);
-		pr_info("unsupported exit state: %d, var_off: %s\n",
+		pr_vlog(env, "unsupported exit state: %d, var_off: %s\n",
 			reg0->type, tn_buf);
 		return -EINVAL;
 	}
@@ -160,7 +161,7 @@ nfp_bpf_check_exit(struct nfp_prog *nfp_prog,
 	    imm <= TC_ACT_REDIRECT &&
 	    imm != TC_ACT_SHOT && imm != TC_ACT_STOLEN &&
 	    imm != TC_ACT_QUEUED) {
-		pr_info("unsupported exit state: %d, imm: %llx\n",
+		pr_vlog(env, "unsupported exit state: %d, imm: %llx\n",
 			reg0->type, imm);
 		return -EINVAL;
 	}
@@ -171,12 +172,13 @@ nfp_bpf_check_exit(struct nfp_prog *nfp_prog,
 static int
 nfp_bpf_check_stack_access(struct nfp_prog *nfp_prog,
 			   struct nfp_insn_meta *meta,
-			   const struct bpf_reg_state *reg)
+			   const struct bpf_reg_state *reg,
+			   struct bpf_verifier_env *env)
 {
 	s32 old_off, new_off;
 
 	if (!tnum_is_const(reg->var_off)) {
-		pr_info("variable ptr stack access\n");
+		pr_vlog(env, "variable ptr stack access\n");
 		return -EINVAL;
 	}
 
@@ -194,7 +196,7 @@ nfp_bpf_check_stack_access(struct nfp_prog *nfp_prog,
 	if (old_off % 4 == new_off % 4)
 		return 0;
 
-	pr_info("stack access changed location was:%d is:%d\n",
+	pr_vlog(env, "stack access changed location was:%d is:%d\n",
 		old_off, new_off);
 	return -EINVAL;
 }
@@ -209,18 +211,18 @@ nfp_bpf_check_ptr(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta,
 	if (reg->type != PTR_TO_CTX &&
 	    reg->type != PTR_TO_STACK &&
 	    reg->type != PTR_TO_PACKET) {
-		pr_info("unsupported ptr type: %d\n", reg->type);
+		pr_vlog(env, "unsupported ptr type: %d\n", reg->type);
 		return -EINVAL;
 	}
 
 	if (reg->type == PTR_TO_STACK) {
-		err = nfp_bpf_check_stack_access(nfp_prog, meta, reg);
+		err = nfp_bpf_check_stack_access(nfp_prog, meta, reg, env);
 		if (err)
 			return err;
 	}
 
 	if (meta->ptr.type != NOT_INIT && meta->ptr.type != reg->type) {
-		pr_info("ptr type changed for instruction %d -> %d\n",
+		pr_vlog(env, "ptr type changed for instruction %d -> %d\n",
 			meta->ptr.type, reg->type);
 		return -EINVAL;
 	}
@@ -241,7 +243,7 @@ nfp_verify_insn(struct bpf_verifier_env *env, int insn_idx, int prev_insn_idx)
 
 	if (meta->insn.src_reg >= MAX_BPF_REG ||
 	    meta->insn.dst_reg >= MAX_BPF_REG) {
-		pr_err("program uses extended registers - jit hardening?\n");
+		pr_vlog(env, "program uses extended registers - jit hardening?\n");
 		return -EINVAL;
 	}
 
-- 
cgit v1.2.3