1 /**********************************************************************
4 * Contact: support@cavium.com
5 * Please include "LiquidIO" in the subject.
7 * Copyright (c) 2003-2016 Cavium, Inc.
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more details.
17 ***********************************************************************/
18 /*! \file octeon_main.h
19 * \brief Host Driver: This file is included by all host driver source files
20 * to include common definitions.
23 #ifndef _OCTEON_MAIN_H_
24 #define _OCTEON_MAIN_H_
26 #include <linux/sched/signal.h>
28 #if BITS_PER_LONG == 32
29 #define CVM_CAST64(v) ((long long)(v))
30 #elif BITS_PER_LONG == 64
31 #define CVM_CAST64(v) ((long long)(long)(v))
33 #error "Unknown system architecture"
36 #define DRV_NAME "LiquidIO"
38 struct octeon_device_priv {
39 /** Tasklet structures for this device. */
40 struct tasklet_struct droq_tasklet;
41 unsigned long napi_mask;
44 /** This structure is used by NIC driver to store information required
45 * to free the sk_buff when the packet has been fetched by Octeon.
46 * Bytes offset below assume worst-case of a 64-bit system.
48 struct octnet_buf_free_info {
49 /** Bytes 1-8. Pointer to network device private structure. */
52 /** Bytes 9-16. Pointer to sk_buff. */
55 /** Bytes 17-24. Pointer to gather list. */
56 struct octnic_gather *g;
58 /** Bytes 25-32. Physical address of skb->data or gather list. */
61 /** Bytes 33-47. Piggybacked soft command, if any */
62 struct octeon_soft_command *sc;
65 /* BQL-related functions */
66 int octeon_report_sent_bytes_to_bql(void *buf, int reqtype);
67 void octeon_update_tx_completion_counters(void *buf, int reqtype,
68 unsigned int *pkts_compl,
69 unsigned int *bytes_compl);
70 void octeon_report_tx_completion_to_bql(void *txq, unsigned int pkts_compl,
71 unsigned int bytes_compl);
72 void octeon_pf_changed_vf_macaddr(struct octeon_device *oct, u8 *mac);
74 static inline void octeon_swap_8B_data(u64 *data, u32 blocks)
84 * \brief unmaps a PCI BAR
85 * @param oct Pointer to Octeon device
86 * @param baridx bar index
88 static inline void octeon_unmap_pci_barx(struct octeon_device *oct, int baridx)
90 dev_dbg(&oct->pci_dev->dev, "Freeing PCI mapped regions for Bar%d\n",
93 if (oct->mmio[baridx].done)
94 iounmap(oct->mmio[baridx].hw_addr);
96 if (oct->mmio[baridx].start)
97 pci_release_region(oct->pci_dev, baridx * 2);
101 * \brief maps a PCI BAR
102 * @param oct Pointer to Octeon device
103 * @param baridx bar index
104 * @param max_map_len maximum length of mapped memory
106 static inline int octeon_map_pci_barx(struct octeon_device *oct,
107 int baridx, int max_map_len)
111 if (pci_request_region(oct->pci_dev, baridx * 2, DRV_NAME)) {
112 dev_err(&oct->pci_dev->dev, "pci_request_region failed for bar %d\n",
117 oct->mmio[baridx].start = pci_resource_start(oct->pci_dev, baridx * 2);
118 oct->mmio[baridx].len = pci_resource_len(oct->pci_dev, baridx * 2);
120 mapped_len = oct->mmio[baridx].len;
122 goto err_release_region;
124 if (max_map_len && (mapped_len > max_map_len))
125 mapped_len = max_map_len;
127 oct->mmio[baridx].hw_addr =
128 ioremap(oct->mmio[baridx].start, mapped_len);
129 oct->mmio[baridx].mapped_len = mapped_len;
131 dev_dbg(&oct->pci_dev->dev, "BAR%d start: 0x%llx mapped %u of %u bytes\n",
132 baridx, oct->mmio[baridx].start, mapped_len,
133 oct->mmio[baridx].len);
135 if (!oct->mmio[baridx].hw_addr) {
136 dev_err(&oct->pci_dev->dev, "error ioremap for bar %d\n",
138 goto err_release_region;
140 oct->mmio[baridx].done = 1;
145 pci_release_region(oct->pci_dev, baridx * 2);
150 sleep_cond(wait_queue_head_t *wait_queue, int *condition)
153 wait_queue_entry_t we;
155 init_waitqueue_entry(&we, current);
156 add_wait_queue(wait_queue, &we);
157 while (!(READ_ONCE(*condition))) {
158 set_current_state(TASK_INTERRUPTIBLE);
159 if (signal_pending(current)) {
166 set_current_state(TASK_RUNNING);
167 remove_wait_queue(wait_queue, &we);
171 /* Gives up the CPU for a timeout period.
172 * Check that the condition is not true before we go to sleep for a
176 sleep_timeout_cond(wait_queue_head_t *wait_queue,
180 wait_queue_entry_t we;
182 init_waitqueue_entry(&we, current);
183 add_wait_queue(wait_queue, &we);
184 set_current_state(TASK_INTERRUPTIBLE);
186 schedule_timeout(timeout);
187 set_current_state(TASK_RUNNING);
188 remove_wait_queue(wait_queue, &we);
192 #define ROUNDUP4(val) (((val) + 3) & 0xfffffffc)
196 #define ROUNDUP8(val) (((val) + 7) & 0xfffffff8)
200 #define ROUNDUP16(val) (((val) + 15) & 0xfffffff0)
204 #define ROUNDUP128(val) (((val) + 127) & 0xffffff80)
207 #endif /* _OCTEON_MAIN_H_ */