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Commit 169650d3 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'nfp-cleanups-and-RX-path-rewrite' 



Jakub Kicinski says:

====================
nfp: cleanups and RX path rewrite

This series lays groundwork for upcoming XDP support by updating
the RX path not to pre-allocate sk_buffs.  I start with few
cleanups, removal of NFP3200-related code being the most significant.
Patch 7 moves to alloc_frag() and build_skb() APIs.  Again, a number
of small cleanups follow.  The set ends with adding support for
different number of RX and TX rings.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 6d052e9a cbeaf7aa

drivers/net/ethernet/netronome/nfp/nfp_net.h

+22 −21
Original line number Diff line number Diff line
@@ -75,7 +75,6 @@ 


/* Default size for MTU and freelist buffer sizes */

#define NFP_NET_DEFAULT_MTU		1500

#define NFP_NET_DEFAULT_RX_BUFSZ	2048



/* Maximum number of bytes prepended to a packet */

#define NFP_NET_MAX_PREPEND		64
@@ -88,6 +87,9 @@ 
/* Queue/Ring definitions */

#define NFP_NET_MAX_TX_RINGS	64	/* Max. # of Tx rings per device */

#define NFP_NET_MAX_RX_RINGS	64	/* Max. # of Rx rings per device */

#define NFP_NET_MAX_R_VECS	(NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \

				 NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS)

#define NFP_NET_MAX_IRQS	(NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS)



#define NFP_NET_MIN_TX_DESCS	256	/* Min. # of Tx descs per ring */

#define NFP_NET_MIN_RX_DESCS	256	/* Min. # of Rx descs per ring */
@@ -102,6 +104,10 @@ 
/* Offload definitions */

#define NFP_NET_N_VXLAN_PORTS	(NFP_NET_CFG_VXLAN_SZ / sizeof(__be16))



#define NFP_NET_RX_BUF_HEADROOM	(NET_SKB_PAD + NET_IP_ALIGN)

#define NFP_NET_RX_BUF_NON_DATA	(NFP_NET_RX_BUF_HEADROOM +		\

				 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))



/* Forward declarations */

struct nfp_net;

struct nfp_net_r_vector;
@@ -278,11 +284,11 @@ struct nfp_net_rx_hash { 


/**

 * struct nfp_net_rx_buf - software RX buffer descriptor

 * @skb:	sk_buff associated with this buffer

 * @frag:	page fragment buffer

 * @dma_addr:	DMA mapping address of the buffer

 */

struct nfp_net_rx_buf {

	struct sk_buff *skb;

	void *frag;

	dma_addr_t dma_addr;

};
@@ -421,7 +427,6 @@ struct nfp_stat_pair { 
 * @netdev:             Backpointer to net_device structure

 * @nfp_fallback:       Is the driver used in fallback mode?

 * @is_vf:              Is the driver attached to a VF?

 * @is_nfp3200:         Is the driver for a NFP-3200 card?

 * @fw_loaded:          Is the firmware loaded?

 * @bpf_offload_skip_sw:  Offloaded BPF program will not be rerun by cls_bpf

 * @ctrl:               Local copy of the control register/word.
@@ -451,7 +456,7 @@ struct nfp_stat_pair { 
 * @rxd_cnt:            Size of the RX ring in number of descriptors

 * @tx_rings:           Array of pre-allocated TX ring structures

 * @rx_rings:           Array of pre-allocated RX ring structures

 * @num_irqs:	        Number of allocated interrupt vectors

 * @max_r_vecs:	        Number of allocated interrupt vectors for RX/TX

 * @num_r_vecs:         Number of used ring vectors

 * @r_vecs:             Pre-allocated array of ring vectors

 * @irq_entries:        Pre-allocated array of MSI-X entries
@@ -487,7 +492,6 @@ struct nfp_net { 


	unsigned nfp_fallback:1;

	unsigned is_vf:1;

	unsigned is_nfp3200:1;

	unsigned fw_loaded:1;

	unsigned bpf_offload_skip_sw:1;
@@ -524,11 +528,11 @@ struct nfp_net { 
	struct timer_list rx_filter_stats_timer;

	spinlock_t rx_filter_lock;



	int max_tx_rings;

	int max_rx_rings;

	unsigned int max_tx_rings;

	unsigned int max_rx_rings;



	int num_tx_rings;

	int num_rx_rings;

	unsigned int num_tx_rings;

	unsigned int num_rx_rings;



	int stride_tx;

	int stride_rx;
@@ -536,11 +540,10 @@ struct nfp_net { 
	int txd_cnt;

	int rxd_cnt;



	u8 num_irqs;

	u8 num_r_vecs;

	struct nfp_net_r_vector r_vecs[NFP_NET_MAX_TX_RINGS];

	struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS +

				      NFP_NET_MAX_TX_RINGS];

	unsigned int max_r_vecs;

	unsigned int num_r_vecs;

	struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS];

	struct msix_entry irq_entries[NFP_NET_MAX_IRQS];



	irq_handler_t lsc_handler;

	char lsc_name[IFNAMSIZ + 8];
@@ -593,16 +596,13 @@ static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) 
	writeb(val, nn->ctrl_bar + off);

}



/* NFP-3200 can't handle 16-bit accesses too well */

static inline u16 nn_readw(struct nfp_net *nn, int off)

{

	WARN_ON_ONCE(nn->is_nfp3200);

	return readw(nn->ctrl_bar + off);

}



static inline void nn_writew(struct nfp_net *nn, int off, u16 val)

{

	WARN_ON_ONCE(nn->is_nfp3200);

	writew(val, nn->ctrl_bar + off);

}
@@ -650,7 +650,7 @@ static inline void nn_pci_flush(struct nfp_net *nn) 
#define NFP_QCP_QUEUE_STS_HI			0x000c

#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask	0x3ffff



/* The offset of a QCP queues in the PCIe Target (same on NFP3200 and NFP6000 */

/* The offset of a QCP queues in the PCIe Target */

#define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff)))



/* nfp_qcp_ptr - Read or Write Pointer of a queue */
@@ -757,8 +757,9 @@ extern const char nfp_net_driver_version[]; 
void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,

			    void __iomem *ctrl_bar);



struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev,

				     int max_tx_rings, int max_rx_rings);

struct nfp_net *

nfp_net_netdev_alloc(struct pci_dev *pdev,

		     unsigned int max_tx_rings, unsigned int max_rx_rings);

void nfp_net_netdev_free(struct nfp_net *nn);

int nfp_net_netdev_init(struct net_device *netdev);

void nfp_net_netdev_clean(struct net_device *netdev);