ibmveth.h

  1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 * IBM Power Virtual Ethernet Device Driver
  4 *
  5 * Copyright (C) IBM Corporation, 2003, 2010
  6 *
  7 * Authors: Dave Larson <larson1@us.ibm.com>
  8 *	    Santiago Leon <santil@linux.vnet.ibm.com>
  9 *	    Brian King <brking@linux.vnet.ibm.com>
 10 *	    Robert Jennings <rcj@linux.vnet.ibm.com>
 11 *	    Anton Blanchard <anton@au.ibm.com>
 12 */
 13
 14#ifndef _IBMVETH_H
 15#define _IBMVETH_H
 16
 17/* constants for H_MULTICAST_CTRL */
 18#define IbmVethMcastReceptionModifyBit     0x80000UL
 19#define IbmVethMcastReceptionEnableBit     0x20000UL
 20#define IbmVethMcastFilterModifyBit        0x40000UL
 21#define IbmVethMcastFilterEnableBit        0x10000UL
 22
 23#define IbmVethMcastEnableRecv       (IbmVethMcastReceptionModifyBit | IbmVethMcastReceptionEnableBit)
 24#define IbmVethMcastDisableRecv      (IbmVethMcastReceptionModifyBit)
 25#define IbmVethMcastEnableFiltering  (IbmVethMcastFilterModifyBit | IbmVethMcastFilterEnableBit)
 26#define IbmVethMcastDisableFiltering (IbmVethMcastFilterModifyBit)
 27#define IbmVethMcastAddFilter        0x1UL
 28#define IbmVethMcastRemoveFilter     0x2UL
 29#define IbmVethMcastClearFilterTable 0x3UL
 30
 31#define IBMVETH_ILLAN_RX_MULTI_BUFF_SUPPORT	0x0000000000040000UL
 32#define IBMVETH_ILLAN_LRG_SR_ENABLED	0x0000000000010000UL
 33#define IBMVETH_ILLAN_LRG_SND_SUPPORT	0x0000000000008000UL
 34#define IBMVETH_ILLAN_PADDED_PKT_CSUM	0x0000000000002000UL
 35#define IBMVETH_ILLAN_TRUNK_PRI_MASK	0x0000000000000F00UL
 36#define IBMVETH_ILLAN_IPV6_TCP_CSUM		0x0000000000000004UL
 37#define IBMVETH_ILLAN_IPV4_TCP_CSUM		0x0000000000000002UL
 38#define IBMVETH_ILLAN_ACTIVE_TRUNK		0x0000000000000001UL
 39
 40/* hcall macros */
 41#define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
 42  plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
 43
 44#define h_free_logical_lan(ua) \
 45  plpar_hcall_norets(H_FREE_LOGICAL_LAN, ua)
 46
 47#define h_add_logical_lan_buffer(ua, buf) \
 48  plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
 49
 50static inline long h_add_logical_lan_buffers(unsigned long unit_address,
 51					     unsigned long desc1,
 52					     unsigned long desc2,
 53					     unsigned long desc3,
 54					     unsigned long desc4,
 55					     unsigned long desc5,
 56					     unsigned long desc6,
 57					     unsigned long desc7,
 58					     unsigned long desc8)
 59{
 60	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 61
 62	return plpar_hcall9(H_ADD_LOGICAL_LAN_BUFFERS,
 63			    retbuf, unit_address,
 64			    desc1, desc2, desc3, desc4,
 65			    desc5, desc6, desc7, desc8);
 66}
 67
 68/* FW allows us to send 6 descriptors but we only use one so mark
 69 * the other 5 as unused (0)
 70 */
 71static inline long h_send_logical_lan(unsigned long unit_address,
 72		unsigned long desc, unsigned long corellator_in,
 73		unsigned long *corellator_out, unsigned long mss,
 74		unsigned long large_send_support)
 75{
 76	long rc;
 77	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 78
 79	if (large_send_support)
 80		rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address,
 81				  desc, 0, 0, 0, 0, 0, corellator_in, mss);
 82	else
 83		rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address,
 84				  desc, 0, 0, 0, 0, 0, corellator_in);
 85
 86	*corellator_out = retbuf[0];
 87
 88	return rc;
 89}
 90
 91static inline long h_illan_attributes(unsigned long unit_address,
 92				      unsigned long reset_mask, unsigned long set_mask,
 93				      unsigned long *ret_attributes)
 94{
 95	long rc;
 96	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 97
 98	rc = plpar_hcall(H_ILLAN_ATTRIBUTES, retbuf, unit_address,
 99			 reset_mask, set_mask);
100
101	*ret_attributes = retbuf[0];
102
103	return rc;
104}
105
106#define h_multicast_ctrl(ua, cmd, mac) \
107  plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
108
109#define h_change_logical_lan_mac(ua, mac) \
110  plpar_hcall_norets(H_CHANGE_LOGICAL_LAN_MAC, ua, mac)
111
112#define IBMVETH_NUM_BUFF_POOLS 5
113#define IBMVETH_IO_ENTITLEMENT_DEFAULT 4243456 /* MTU of 1500 needs 4.2Mb */
114#define IBMVETH_BUFF_OH 22 /* Overhead: 14 ethernet header + 8 opaque handle */
115#define IBMVETH_MIN_MTU 68
116#define IBMVETH_MAX_POOL_COUNT 4096
117#define IBMVETH_BUFF_LIST_SIZE 4096
118#define IBMVETH_FILT_LIST_SIZE 4096
119#define IBMVETH_MAX_BUF_SIZE (1024 * 128)
120#define IBMVETH_MAX_TX_BUF_SIZE (1024 * 64)
121#define IBMVETH_MAX_QUEUES 16U
122#define IBMVETH_DEFAULT_QUEUES 8U
123#define IBMVETH_MAX_RX_PER_HCALL 8U
124
125static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
126static int pool_count[] = { 256, 512, 256, 256, 256 };
127static int pool_count_cmo[] = { 256, 512, 256, 256, 64 };
128static int pool_active[] = { 1, 1, 0, 0, 1};
129
130#define IBM_VETH_INVALID_MAP ((u16)0xffff)
131
132struct ibmveth_buff_pool {
133    u32 size;
134    u32 index;
135    u32 buff_size;
136    u32 threshold;
137    atomic_t available;
138    u32 consumer_index;
139    u32 producer_index;
140    u16 *free_map;
141    dma_addr_t *dma_addr;
142    struct sk_buff **skbuff;
143    int active;
144    struct kobject kobj;
145};
146
147struct ibmveth_rx_q {
148    u64        index;
149    u64        num_slots;
150    u64        toggle;
151    dma_addr_t queue_dma;
152    u32        queue_len;
153    struct ibmveth_rx_q_entry *queue_addr;
154};
155
156struct ibmveth_adapter {
157	struct vio_dev *vdev;
158	struct net_device *netdev;
159	struct napi_struct napi;
160	struct work_struct work;
161	unsigned int mcastFilterSize;
162	void *buffer_list_addr;
163	void *filter_list_addr;
164	void *tx_ltb_ptr[IBMVETH_MAX_QUEUES];
165	unsigned int tx_ltb_size;
166	dma_addr_t tx_ltb_dma[IBMVETH_MAX_QUEUES];
167	dma_addr_t buffer_list_dma;
168	dma_addr_t filter_list_dma;
169	struct ibmveth_buff_pool rx_buff_pool[IBMVETH_NUM_BUFF_POOLS];
170	struct ibmveth_rx_q rx_queue;
171	int rx_csum;
172	int large_send;
173	bool is_active_trunk;
174	unsigned int rx_buffers_per_hcall;
175
176	u64 fw_ipv6_csum_support;
177	u64 fw_ipv4_csum_support;
178	u64 fw_large_send_support;
179	/* adapter specific stats */
180	u64 replenish_task_cycles;
181	u64 replenish_no_mem;
182	u64 replenish_add_buff_failure;
183	u64 replenish_add_buff_success;
184	u64 rx_invalid_buffer;
185	u64 rx_no_buffer;
186	u64 tx_map_failed;
187	u64 tx_send_failed;
188	u64 tx_large_packets;
189	u64 rx_large_packets;
190	/* Ethtool settings */
191	u8 duplex;
192	u32 speed;
193};
194
195/*
196 * We pass struct ibmveth_buf_desc_fields to the hypervisor in registers,
197 * so we don't need to byteswap the two elements. However since we use
198 * a union (ibmveth_buf_desc) to convert from the struct to a u64 we
199 * do end up with endian specific ordering of the elements and that
200 * needs correcting.
201 */
202struct ibmveth_buf_desc_fields {
203#ifdef __BIG_ENDIAN
204	u32 flags_len;
205	u32 address;
206#else
207	u32 address;
208	u32 flags_len;
209#endif
210#define IBMVETH_BUF_VALID	0x80000000
211#define IBMVETH_BUF_TOGGLE	0x40000000
212#define IBMVETH_BUF_LRG_SND     0x04000000
213#define IBMVETH_BUF_NO_CSUM	0x02000000
214#define IBMVETH_BUF_CSUM_GOOD	0x01000000
215#define IBMVETH_BUF_LEN_MASK	0x00FFFFFF
216};
217
218union ibmveth_buf_desc {
219    u64 desc;
220    struct ibmveth_buf_desc_fields fields;
221};
222
223struct ibmveth_rx_q_entry {
224	__be32 flags_off;
225#define IBMVETH_RXQ_TOGGLE		0x80000000
226#define IBMVETH_RXQ_TOGGLE_SHIFT	31
227#define IBMVETH_RXQ_VALID		0x40000000
228#define IBMVETH_RXQ_LRG_PKT		0x04000000
229#define IBMVETH_RXQ_NO_CSUM		0x02000000
230#define IBMVETH_RXQ_CSUM_GOOD		0x01000000
231#define IBMVETH_RXQ_OFF_MASK		0x0000FFFF
232
233	__be32 length;
234	/* correlator is only used by the OS, no need to byte swap */
235	u64 correlator;
236};
237
238#endif /* _IBMVETH_H */