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linux-next/drivers/net/ethernet/brocade/bna/bna_hw_defs.h
Rasesh Mody e29aa33912 bna: Enable Multi Buffer RX 
The CT2 HW supports multi-buffer Rx. This patch provides the necessary changes
for bnad to use multi-buffer Rx feature. For BNAD, multi-buffer Rx is by
default enabled when MTU is > 4096. For >4096 MTU, q0 data/large buffers are of
2048 size. As the resource requirements of multi-buffer Rx are different new Rx
needs to be created to use this feature. ASIC posts multiple completions if
frame exceeds buffer size. The last completion is marked with EOP flag.
 - Separate HQ and DQ enums for resource allocations and configurations.
 - rx_config and rxq structure changes to pass the correct info from bnad.
 - DQ depth need not be same as HQ depth. So CQ depth is adjusted accordingly.
 - Rx CFG frame size is taken from configured MTU.
 - Rx q0 buffer size is configured from bnad s rx_config when multi-buffer is
   enabled.
 - Poll for entire frame completion.
 - Once EOP completion is received gather the number of vectors used by the
   frame to submit it to the stack.
 - Changed MTU to frame size wherever necessary.

Signed-off-by: Rasesh Mody <rmody@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-18 00:30:33 -05:00

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/*
* Linux network driver for Brocade Converged Network Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
/*
* Copyright (c) 2005-2011 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*/
/* File for interrupt macros and functions */
#ifndef __BNA_HW_DEFS_H__
#define __BNA_HW_DEFS_H__
#include "bfi_reg.h"
/* SW imposed limits */
#define BFI_ENET_DEF_TXQ 1
#define BFI_ENET_DEF_RXP 1
#define BFI_ENET_DEF_UCAM 1
#define BFI_ENET_DEF_RITSZ 1
#define BFI_ENET_MAX_MCAM 256
#define BFI_INVALID_RID -1
#define BFI_IBIDX_SIZE 4
#define BFI_VLAN_WORD_SHIFT 5 /* 32 bits */
#define BFI_VLAN_WORD_MASK 0x1F
#define BFI_VLAN_BLOCK_SHIFT 9 /* 512 bits */
#define BFI_VLAN_BMASK_ALL 0xFF
#define BFI_COALESCING_TIMER_UNIT 5 /* 5us */
#define BFI_MAX_COALESCING_TIMEO 0xFF /* in 5us units */
#define BFI_MAX_INTERPKT_COUNT 0xFF
#define BFI_MAX_INTERPKT_TIMEO 0xF /* in 0.5us units */
#define BFI_TX_COALESCING_TIMEO 20 /* 20 * 5 = 100us */
#define BFI_TX_INTERPKT_COUNT 12 /* Pkt Cnt = 12 */
#define BFI_TX_INTERPKT_TIMEO 15 /* 15 * 0.5 = 7.5us */
#define BFI_RX_COALESCING_TIMEO 12 /* 12 * 5 = 60us */
#define BFI_RX_INTERPKT_COUNT 6 /* Pkt Cnt = 6 */
#define BFI_RX_INTERPKT_TIMEO 3 /* 3 * 0.5 = 1.5us */
#define BFI_TXQ_WI_SIZE 64 /* bytes */
#define BFI_RXQ_WI_SIZE 8 /* bytes */
#define BFI_CQ_WI_SIZE 16 /* bytes */
#define BFI_TX_MAX_WRR_QUOTA 0xFFF
#define BFI_TX_MAX_VECTORS_PER_WI 4
#define BFI_TX_MAX_VECTORS_PER_PKT 0xFF
#define BFI_TX_MAX_DATA_PER_VECTOR 0xFFFF
#define BFI_TX_MAX_DATA_PER_PKT 0xFFFFFF
/* Small Q buffer size */
#define BFI_SMALL_RXBUF_SIZE 128
#define BFI_TX_MAX_PRIO 8
#define BFI_TX_PRIO_MAP_ALL 0xFF
/*
*
* Register definitions and macros
*
*/
#define BNA_PCI_REG_CT_ADDRSZ (0x40000)
#define ct_reg_addr_init(_bna, _pcidev) \
{ \
struct bna_reg_offset reg_offset[] = \
{{HOSTFN0_INT_STATUS, HOSTFN0_INT_MSK}, \
{HOSTFN1_INT_STATUS, HOSTFN1_INT_MSK}, \
{HOSTFN2_INT_STATUS, HOSTFN2_INT_MSK}, \
{HOSTFN3_INT_STATUS, HOSTFN3_INT_MSK} }; \
\
(_bna)->regs.fn_int_status = (_pcidev)->pci_bar_kva + \
reg_offset[(_pcidev)->pci_func].fn_int_status;\
(_bna)->regs.fn_int_mask = (_pcidev)->pci_bar_kva + \
reg_offset[(_pcidev)->pci_func].fn_int_mask;\
}
#define ct_bit_defn_init(_bna, _pcidev) \
{ \
(_bna)->bits.mbox_status_bits = (__HFN_INT_MBOX_LPU0 | \
__HFN_INT_MBOX_LPU1); \
(_bna)->bits.mbox_mask_bits = (__HFN_INT_MBOX_LPU0 | \
__HFN_INT_MBOX_LPU1); \
(_bna)->bits.error_status_bits = (__HFN_INT_ERR_MASK); \
(_bna)->bits.error_mask_bits = (__HFN_INT_ERR_MASK); \
(_bna)->bits.halt_status_bits = __HFN_INT_LL_HALT; \
(_bna)->bits.halt_mask_bits = __HFN_INT_LL_HALT; \
}
#define ct2_reg_addr_init(_bna, _pcidev) \
{ \
(_bna)->regs.fn_int_status = (_pcidev)->pci_bar_kva + \
CT2_HOSTFN_INT_STATUS; \
(_bna)->regs.fn_int_mask = (_pcidev)->pci_bar_kva + \
CT2_HOSTFN_INTR_MASK; \
}
#define ct2_bit_defn_init(_bna, _pcidev) \
{ \
(_bna)->bits.mbox_status_bits = (__HFN_INT_MBOX_LPU0_CT2 | \
__HFN_INT_MBOX_LPU1_CT2); \
(_bna)->bits.mbox_mask_bits = (__HFN_INT_MBOX_LPU0_CT2 | \
__HFN_INT_MBOX_LPU1_CT2); \
(_bna)->bits.error_status_bits = (__HFN_INT_ERR_MASK_CT2); \
(_bna)->bits.error_mask_bits = (__HFN_INT_ERR_MASK_CT2); \
(_bna)->bits.halt_status_bits = __HFN_INT_CPQ_HALT_CT2; \
(_bna)->bits.halt_mask_bits = __HFN_INT_CPQ_HALT_CT2; \
}
#define bna_reg_addr_init(_bna, _pcidev) \
{ \
switch ((_pcidev)->device_id) { \
case PCI_DEVICE_ID_BROCADE_CT: \
ct_reg_addr_init((_bna), (_pcidev)); \
ct_bit_defn_init((_bna), (_pcidev)); \
break; \
case BFA_PCI_DEVICE_ID_CT2: \
ct2_reg_addr_init((_bna), (_pcidev)); \
ct2_bit_defn_init((_bna), (_pcidev)); \
break; \
} \
}
#define bna_port_id_get(_bna) ((_bna)->ioceth.ioc.port_id)
/* Interrupt related bits, flags and macros */
#define IB_STATUS_BITS 0x0000ffff
#define BNA_IS_MBOX_INTR(_bna, _intr_status) \
((_intr_status) & (_bna)->bits.mbox_status_bits)
#define BNA_IS_HALT_INTR(_bna, _intr_status) \
((_intr_status) & (_bna)->bits.halt_status_bits)
#define BNA_IS_ERR_INTR(_bna, _intr_status) \
((_intr_status) & (_bna)->bits.error_status_bits)
#define BNA_IS_MBOX_ERR_INTR(_bna, _intr_status) \
(BNA_IS_MBOX_INTR(_bna, _intr_status) | \
BNA_IS_ERR_INTR(_bna, _intr_status))
#define BNA_IS_INTX_DATA_INTR(_intr_status) \
((_intr_status) & IB_STATUS_BITS)
#define bna_halt_clear(_bna) \
do { \
u32 init_halt; \
init_halt = readl((_bna)->ioceth.ioc.ioc_regs.ll_halt); \
init_halt &= ~__FW_INIT_HALT_P; \
writel(init_halt, (_bna)->ioceth.ioc.ioc_regs.ll_halt); \
init_halt = readl((_bna)->ioceth.ioc.ioc_regs.ll_halt); \
} while (0)
#define bna_intx_disable(_bna, _cur_mask) \
{ \
(_cur_mask) = readl((_bna)->regs.fn_int_mask); \
writel(0xffffffff, (_bna)->regs.fn_int_mask); \
}
#define bna_intx_enable(bna, new_mask) \
writel((new_mask), (bna)->regs.fn_int_mask)
#define bna_mbox_intr_disable(bna) \
do { \
u32 mask; \
mask = readl((bna)->regs.fn_int_mask); \
writel((mask | (bna)->bits.mbox_mask_bits | \
(bna)->bits.error_mask_bits), (bna)->regs.fn_int_mask); \
mask = readl((bna)->regs.fn_int_mask); \
} while (0)
#define bna_mbox_intr_enable(bna) \
do { \
u32 mask; \
mask = readl((bna)->regs.fn_int_mask); \
writel((mask & ~((bna)->bits.mbox_mask_bits | \
(bna)->bits.error_mask_bits)), (bna)->regs.fn_int_mask);\
mask = readl((bna)->regs.fn_int_mask); \
} while (0)
#define bna_intr_status_get(_bna, _status) \
{ \
(_status) = readl((_bna)->regs.fn_int_status); \
if (_status) { \
writel(((_status) & ~(_bna)->bits.mbox_status_bits), \
(_bna)->regs.fn_int_status); \
} \
}
/*
* MAX ACK EVENTS : No. of acks that can be accumulated in driver,
* before acking to h/w. The no. of bits is 16 in the doorbell register,
* however we keep this limited to 15 bits.
* This is because around the edge of 64K boundary (16 bits), one
* single poll can make the accumulated ACK counter cross the 64K boundary,
* causing problems, when we try to ack with a value greater than 64K.
* 15 bits (32K) should be large enough to accumulate, anyways, and the max.
* acked events to h/w can be (32K + max poll weight) (currently 64).
*/
#define BNA_IB_MAX_ACK_EVENTS (1 << 15)
/* These macros build the data portion of the TxQ/RxQ doorbell */
#define BNA_DOORBELL_Q_PRD_IDX(_pi) (0x80000000 | (_pi))
#define BNA_DOORBELL_Q_STOP (0x40000000)
/* These macros build the data portion of the IB doorbell */
#define BNA_DOORBELL_IB_INT_ACK(_timeout, _events) \
(0x80000000 | ((_timeout) << 16) | (_events))
#define BNA_DOORBELL_IB_INT_DISABLE (0x40000000)
/* Set the coalescing timer for the given ib */
#define bna_ib_coalescing_timer_set(_i_dbell, _cls_timer) \
((_i_dbell)->doorbell_ack = BNA_DOORBELL_IB_INT_ACK((_cls_timer), 0));
/* Acks 'events' # of events for a given ib while disabling interrupts */
#define bna_ib_ack_disable_irq(_i_dbell, _events) \
(writel(BNA_DOORBELL_IB_INT_ACK(0, (_events)), \
(_i_dbell)->doorbell_addr));
/* Acks 'events' # of events for a given ib */
#define bna_ib_ack(_i_dbell, _events) \
(writel(((_i_dbell)->doorbell_ack | (_events)), \
(_i_dbell)->doorbell_addr));
#define bna_ib_start(_bna, _ib, _is_regular) \
{ \
u32 intx_mask; \
struct bna_ib *ib = _ib; \
if ((ib->intr_type == BNA_INTR_T_INTX)) { \
bna_intx_disable((_bna), intx_mask); \
intx_mask &= ~(ib->intr_vector); \
bna_intx_enable((_bna), intx_mask); \
} \
bna_ib_coalescing_timer_set(&ib->door_bell, \
ib->coalescing_timeo); \
if (_is_regular) \
bna_ib_ack(&ib->door_bell, 0); \
}
#define bna_ib_stop(_bna, _ib) \
{ \
u32 intx_mask; \
struct bna_ib *ib = _ib; \
writel(BNA_DOORBELL_IB_INT_DISABLE, \
ib->door_bell.doorbell_addr); \
if (ib->intr_type == BNA_INTR_T_INTX) { \
bna_intx_disable((_bna), intx_mask); \
intx_mask |= ib->intr_vector; \
bna_intx_enable((_bna), intx_mask); \
} \
}
#define bna_txq_prod_indx_doorbell(_tcb) \
(writel(BNA_DOORBELL_Q_PRD_IDX((_tcb)->producer_index), \
(_tcb)->q_dbell));
#define bna_rxq_prod_indx_doorbell(_rcb) \
(writel(BNA_DOORBELL_Q_PRD_IDX((_rcb)->producer_index), \
(_rcb)->q_dbell));
/* TxQ, RxQ, CQ related bits, offsets, macros */
/* TxQ Entry Opcodes */
#define BNA_TXQ_WI_SEND (0x402) /* Single Frame Transmission */
#define BNA_TXQ_WI_SEND_LSO (0x403) /* Multi-Frame Transmission */
#define BNA_TXQ_WI_EXTENSION (0x104) /* Extension WI */
/* TxQ Entry Control Flags */
#define BNA_TXQ_WI_CF_FCOE_CRC (1 << 8)
#define BNA_TXQ_WI_CF_IPID_MODE (1 << 5)
#define BNA_TXQ_WI_CF_INS_PRIO (1 << 4)
#define BNA_TXQ_WI_CF_INS_VLAN (1 << 3)
#define BNA_TXQ_WI_CF_UDP_CKSUM (1 << 2)
#define BNA_TXQ_WI_CF_TCP_CKSUM (1 << 1)
#define BNA_TXQ_WI_CF_IP_CKSUM (1 << 0)
#define BNA_TXQ_WI_L4_HDR_N_OFFSET(_hdr_size, _offset) \
(((_hdr_size) << 10) | ((_offset) & 0x3FF))
/*
* Completion Q defines
*/
/* CQ Entry Flags */
#define BNA_CQ_EF_MAC_ERROR (1 << 0)
#define BNA_CQ_EF_FCS_ERROR (1 << 1)
#define BNA_CQ_EF_TOO_LONG (1 << 2)
#define BNA_CQ_EF_FC_CRC_OK (1 << 3)
#define BNA_CQ_EF_RSVD1 (1 << 4)
#define BNA_CQ_EF_L4_CKSUM_OK (1 << 5)
#define BNA_CQ_EF_L3_CKSUM_OK (1 << 6)
#define BNA_CQ_EF_HDS_HEADER (1 << 7)
#define BNA_CQ_EF_UDP (1 << 8)
#define BNA_CQ_EF_TCP (1 << 9)
#define BNA_CQ_EF_IP_OPTIONS (1 << 10)
#define BNA_CQ_EF_IPV6 (1 << 11)
#define BNA_CQ_EF_IPV4 (1 << 12)
#define BNA_CQ_EF_VLAN (1 << 13)
#define BNA_CQ_EF_RSS (1 << 14)
#define BNA_CQ_EF_RSVD2 (1 << 15)
#define BNA_CQ_EF_MCAST_MATCH (1 << 16)
#define BNA_CQ_EF_MCAST (1 << 17)
#define BNA_CQ_EF_BCAST (1 << 18)
#define BNA_CQ_EF_REMOTE (1 << 19)
#define BNA_CQ_EF_LOCAL (1 << 20)
/* CAT2 ASIC does not use bit 21 as per the SPEC.
* Bit 31 is set in every end of frame completion
*/
#define BNA_CQ_EF_EOP (1 << 31)
/* Data structures */
struct bna_reg_offset {
u32 fn_int_status;
u32 fn_int_mask;
};
struct bna_bit_defn {
u32 mbox_status_bits;
u32 mbox_mask_bits;
u32 error_status_bits;
u32 error_mask_bits;
u32 halt_status_bits;
u32 halt_mask_bits;
};
struct bna_reg {
void __iomem *fn_int_status;
void __iomem *fn_int_mask;
};
/* TxQ Vector (a.k.a. Tx-Buffer Descriptor) */
struct bna_dma_addr {
u32 msb;
u32 lsb;
};
struct bna_txq_wi_vector {
u16 reserved;
u16 length; /* Only 14 LSB are valid */
struct bna_dma_addr host_addr; /* Tx-Buf DMA addr */
};
/* TxQ Entry Structure
*
* BEWARE: Load values into this structure with correct endianess.
*/
struct bna_txq_entry {
union {
struct {
u8 reserved;
u8 num_vectors; /* number of vectors present */
u16 opcode; /* Either */
/* BNA_TXQ_WI_SEND or */
/* BNA_TXQ_WI_SEND_LSO */
u16 flags; /* OR of all the flags */
u16 l4_hdr_size_n_offset;
u16 vlan_tag;
u16 lso_mss; /* Only 14 LSB are valid */
u32 frame_length; /* Only 24 LSB are valid */
} wi;
struct {
u16 reserved;
u16 opcode; /* Must be */
/* BNA_TXQ_WI_EXTENSION */
u32 reserved2[3]; /* Place holder for */
/* removed vector (12 bytes) */
} wi_ext;
} hdr;
struct bna_txq_wi_vector vector[4];
};
/* RxQ Entry Structure */
struct bna_rxq_entry { /* Rx-Buffer */
struct bna_dma_addr host_addr; /* Rx-Buffer DMA address */
};
/* CQ Entry Structure */
struct bna_cq_entry {
u32 flags;
u16 vlan_tag;
u16 length;
u32 rss_hash;
u8 valid;
u8 reserved1;
u8 reserved2;
u8 rxq_id;
};
#endif /* __BNA_HW_DEFS_H__ */
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