drivers/net/ethernet/cavium/liquidio/octeon_main.h

   1 /**********************************************************************
   2  * Author: Cavium, Inc.
   3  *
   4  * Contact: support@cavium.com
   5  *          Please include "LiquidIO" in the subject.
   6  *
   7  * Copyright (c) 2003-2016 Cavium, Inc.
   8  *
   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.
  12  *
  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.
  21  */
  22
  23 #ifndef _OCTEON_MAIN_H_
  24 #define  _OCTEON_MAIN_H_
  25
  26 #include <linux/sched/signal.h>
  27
  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))
  32 #else
  33 #error "Unknown system architecture"
  34 #endif
  35
  36 #define DRV_NAME "LiquidIO"
  37
  38 /** This structure is used by NIC driver to store information required
  39  * to free the sk_buff when the packet has been fetched by Octeon.
  40  * Bytes offset below assume worst-case of a 64-bit system.
  41  */
  42 struct octnet_buf_free_info {
  43         /** Bytes 1-8.  Pointer to network device private structure. */
  44         struct lio *lio;
  45
  46         /** Bytes 9-16.  Pointer to sk_buff. */
  47         struct sk_buff *skb;
  48
  49         /** Bytes 17-24.  Pointer to gather list. */
  50         struct octnic_gather *g;
  51
  52         /** Bytes 25-32. Physical address of skb->data or gather list. */
  53         u64 dptr;
  54
  55         /** Bytes 33-47. Piggybacked soft command, if any */
  56         struct octeon_soft_command *sc;
  57 };
  58
  59 /* BQL-related functions */
  60 void octeon_report_sent_bytes_to_bql(void *buf, int reqtype);
  61 void octeon_update_tx_completion_counters(void *buf, int reqtype,
  62                                           unsigned int *pkts_compl,
  63                                           unsigned int *bytes_compl);
  64 void octeon_report_tx_completion_to_bql(void *txq, unsigned int pkts_compl,
  65                                         unsigned int bytes_compl);
  66 void octeon_pf_changed_vf_macaddr(struct octeon_device *oct, u8 *mac);
  67 /** Swap 8B blocks */
  68 static inline void octeon_swap_8B_data(u64 *data, u32 blocks)
  69 {
  70         while (blocks) {
  71                 cpu_to_be64s(data);
  72                 blocks--;
  73                 data++;
  74         }
  75 }
  76
  77 /**
  78  * \brief unmaps a PCI BAR
  79  * @param oct Pointer to Octeon device
  80  * @param baridx bar index
  81  */
  82 static inline void octeon_unmap_pci_barx(struct octeon_device *oct, int baridx)
  83 {
  84         dev_dbg(&oct->pci_dev->dev, "Freeing PCI mapped regions for Bar%d\n",
  85                 baridx);
  86
  87         if (oct->mmio[baridx].done)
  88                 iounmap(oct->mmio[baridx].hw_addr);
  89
  90         if (oct->mmio[baridx].start)
  91                 pci_release_region(oct->pci_dev, baridx * 2);
  92 }
  93
  94 /**
  95  * \brief maps a PCI BAR
  96  * @param oct Pointer to Octeon device
  97  * @param baridx bar index
  98  * @param max_map_len maximum length of mapped memory
  99  */
 100 static inline int octeon_map_pci_barx(struct octeon_device *oct,
 101                                       int baridx, int max_map_len)
 102 {
 103         u32 mapped_len = 0;
 104
 105         if (pci_request_region(oct->pci_dev, baridx * 2, DRV_NAME)) {
 106                 dev_err(&oct->pci_dev->dev, "pci_request_region failed for bar %d\n",
 107                         baridx);
 108                 return 1;
 109         }
 110
 111         oct->mmio[baridx].start = pci_resource_start(oct->pci_dev, baridx * 2);
 112         oct->mmio[baridx].len = pci_resource_len(oct->pci_dev, baridx * 2);
 113
 114         mapped_len = oct->mmio[baridx].len;
 115         if (!mapped_len)
 116                 goto err_release_region;
 117
 118         if (max_map_len && (mapped_len > max_map_len))
 119                 mapped_len = max_map_len;
 120
 121         oct->mmio[baridx].hw_addr =
 122                 ioremap(oct->mmio[baridx].start, mapped_len);
 123         oct->mmio[baridx].mapped_len = mapped_len;
 124
 125         dev_dbg(&oct->pci_dev->dev, "BAR%d start: 0x%llx mapped %u of %u bytes\n",
 126                 baridx, oct->mmio[baridx].start, mapped_len,
 127                 oct->mmio[baridx].len);
 128
 129         if (!oct->mmio[baridx].hw_addr) {
 130                 dev_err(&oct->pci_dev->dev, "error ioremap for bar %d\n",
 131                         baridx);
 132                 goto err_release_region;
 133         }
 134         oct->mmio[baridx].done = 1;
 135
 136         return 0;
 137
 138 err_release_region:
 139         pci_release_region(oct->pci_dev, baridx * 2);
 140         return 1;
 141 }
 142
 143 static inline void *
 144 cnnic_numa_alloc_aligned_dma(u32 size,
 145                              u32 *alloc_size,
 146                              size_t *orig_ptr,
 147                              int numa_node)
 148 {
 149         int retries = 0;
 150         void *ptr = NULL;
 151
 152 #define OCTEON_MAX_ALLOC_RETRIES     1
 153         do {
 154                 struct page *page = NULL;
 155
 156                 page = alloc_pages_node(numa_node,
 157                                         GFP_KERNEL,
 158                                         get_order(size));
 159                 if (!page)
 160                         page = alloc_pages(GFP_KERNEL,
 161                                            get_order(size));
 162                 ptr = (void *)page_address(page);
 163                 if ((unsigned long)ptr & 0x07) {
 164                         __free_pages(page, get_order(size));
 165                         ptr = NULL;
 166                         /* Increment the size required if the first
 167                          * attempt failed.
 168                          */
 169                         if (!retries)
 170                                 size += 7;
 171                 }
 172                 retries++;
 173         } while ((retries <= OCTEON_MAX_ALLOC_RETRIES) && !ptr);
 174
 175         *alloc_size = size;
 176         *orig_ptr = (unsigned long)ptr;
 177         if ((unsigned long)ptr & 0x07)
 178                 ptr = (void *)(((unsigned long)ptr + 7) & ~(7UL));
 179         return ptr;
 180 }
 181
 182 #define cnnic_free_aligned_dma(pci_dev, ptr, size, orig_ptr, dma_addr) \
 183                 free_pages(orig_ptr, get_order(size))
 184
 185 static inline int
 186 sleep_cond(wait_queue_head_t *wait_queue, int *condition)
 187 {
 188         int errno = 0;
 189         wait_queue_t we;
 190
 191         init_waitqueue_entry(&we, current);
 192         add_wait_queue(wait_queue, &we);
 193         while (!(READ_ONCE(*condition))) {
 194                 set_current_state(TASK_INTERRUPTIBLE);
 195                 if (signal_pending(current)) {
 196                         errno = -EINTR;
 197                         goto out;
 198                 }
 199                 schedule();
 200         }
 201 out:
 202         set_current_state(TASK_RUNNING);
 203         remove_wait_queue(wait_queue, &we);
 204         return errno;
 205 }
 206
 207 /* Gives up the CPU for a timeout period.
 208  * Check that the condition is not true before we go to sleep for a
 209  * timeout period.
 210  */
 211 static inline void
 212 sleep_timeout_cond(wait_queue_head_t *wait_queue,
 213                    int *condition,
 214                    int timeout)
 215 {
 216         wait_queue_t we;
 217
 218         init_waitqueue_entry(&we, current);
 219         add_wait_queue(wait_queue, &we);
 220         set_current_state(TASK_INTERRUPTIBLE);
 221         if (!(*condition))
 222                 schedule_timeout(timeout);
 223         set_current_state(TASK_RUNNING);
 224         remove_wait_queue(wait_queue, &we);
 225 }
 226
 227 #ifndef ROUNDUP4
 228 #define ROUNDUP4(val) (((val) + 3) & 0xfffffffc)
 229 #endif
 230
 231 #ifndef ROUNDUP8
 232 #define ROUNDUP8(val) (((val) + 7) & 0xfffffff8)
 233 #endif
 234
 235 #ifndef ROUNDUP16
 236 #define ROUNDUP16(val) (((val) + 15) & 0xfffffff0)
 237 #endif
 238
 239 #ifndef ROUNDUP128
 240 #define ROUNDUP128(val) (((val) + 127) & 0xffffff80)
 241 #endif
 242
 243 #endif /* _OCTEON_MAIN_H_ */