drivers/net/i40e/base/i40e_hmc.c

   1 /*******************************************************************************
   2
   3 Copyright (c) 2013 - 2015, Intel Corporation
   4 All rights reserved.
   5
   6 Redistribution and use in source and binary forms, with or without
   7 modification, are permitted provided that the following conditions are met:
   8
   9  1. Redistributions of source code must retain the above copyright notice,
  10     this list of conditions and the following disclaimer.
  11
  12  2. Redistributions in binary form must reproduce the above copyright
  13     notice, this list of conditions and the following disclaimer in the
  14     documentation and/or other materials provided with the distribution.
  15
  16  3. Neither the name of the Intel Corporation nor the names of its
  17     contributors may be used to endorse or promote products derived from
  18     this software without specific prior written permission.
  19
  20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30 POSSIBILITY OF SUCH DAMAGE.
  31
  32 ***************************************************************************/
  33
  34 #include "i40e_osdep.h"
  35 #include "i40e_register.h"
  36 #include "i40e_status.h"
  37 #include "i40e_alloc.h"
  38 #include "i40e_hmc.h"
  39 #include "i40e_type.h"
  40
  41 /**
  42  * i40e_add_sd_table_entry - Adds a segment descriptor to the table
  43  * @hw: pointer to our hw struct
  44  * @hmc_info: pointer to the HMC configuration information struct
  45  * @sd_index: segment descriptor index to manipulate
  46  * @type: what type of segment descriptor we're manipulating
  47  * @direct_mode_sz: size to alloc in direct mode
  48  **/
  49 enum i40e_status_code i40e_add_sd_table_entry(struct i40e_hw *hw,
  50                                               struct i40e_hmc_info *hmc_info,
  51                                               u32 sd_index,
  52                                               enum i40e_sd_entry_type type,
  53                                               u64 direct_mode_sz)
  54 {
  55         enum i40e_status_code ret_code = I40E_SUCCESS;
  56         struct i40e_hmc_sd_entry *sd_entry;
  57         enum   i40e_memory_type mem_type;
  58         bool dma_mem_alloc_done = false;
  59         struct i40e_dma_mem mem;
  60         u64 alloc_len;
  61
  62         if (NULL == hmc_info->sd_table.sd_entry) {
  63                 ret_code = I40E_ERR_BAD_PTR;
  64                 DEBUGOUT("i40e_add_sd_table_entry: bad sd_entry\n");
  65                 goto exit;
  66         }
  67
  68         if (sd_index >= hmc_info->sd_table.sd_cnt) {
  69                 ret_code = I40E_ERR_INVALID_SD_INDEX;
  70                 DEBUGOUT("i40e_add_sd_table_entry: bad sd_index\n");
  71                 goto exit;
  72         }
  73
  74         sd_entry = &hmc_info->sd_table.sd_entry[sd_index];
  75         if (!sd_entry->valid) {
  76                 if (I40E_SD_TYPE_PAGED == type) {
  77                         mem_type = i40e_mem_pd;
  78                         alloc_len = I40E_HMC_PAGED_BP_SIZE;
  79                 } else {
  80                         mem_type = i40e_mem_bp_jumbo;
  81                         alloc_len = direct_mode_sz;
  82                 }
  83
  84                 /* allocate a 4K pd page or 2M backing page */
  85                 ret_code = i40e_allocate_dma_mem(hw, &mem, mem_type, alloc_len,
  86                                                  I40E_HMC_PD_BP_BUF_ALIGNMENT);
  87                 if (ret_code)
  88                         goto exit;
  89                 dma_mem_alloc_done = true;
  90                 if (I40E_SD_TYPE_PAGED == type) {
  91                         ret_code = i40e_allocate_virt_mem(hw,
  92                                         &sd_entry->u.pd_table.pd_entry_virt_mem,
  93                                         sizeof(struct i40e_hmc_pd_entry) * 512);
  94                         if (ret_code)
  95                                 goto exit;
  96                         sd_entry->u.pd_table.pd_entry =
  97                                 (struct i40e_hmc_pd_entry *)
  98                                 sd_entry->u.pd_table.pd_entry_virt_mem.va;
  99                         i40e_memcpy(&sd_entry->u.pd_table.pd_page_addr,
 100                                     &mem, sizeof(struct i40e_dma_mem),
 101                                     I40E_NONDMA_TO_NONDMA);
 102                 } else {
 103                         i40e_memcpy(&sd_entry->u.bp.addr,
 104                                     &mem, sizeof(struct i40e_dma_mem),
 105                                     I40E_NONDMA_TO_NONDMA);
 106                         sd_entry->u.bp.sd_pd_index = sd_index;
 107                 }
 108                 /* initialize the sd entry */
 109                 hmc_info->sd_table.sd_entry[sd_index].entry_type = type;
 110
 111                 /* increment the ref count */
 112                 I40E_INC_SD_REFCNT(&hmc_info->sd_table);
 113         }
 114         /* Increment backing page reference count */
 115         if (I40E_SD_TYPE_DIRECT == sd_entry->entry_type)
 116                 I40E_INC_BP_REFCNT(&sd_entry->u.bp);
 117 exit:
 118         if (I40E_SUCCESS != ret_code)
 119                 if (dma_mem_alloc_done)
 120                         i40e_free_dma_mem(hw, &mem);
 121
 122         return ret_code;
 123 }
 124
 125 /**
 126  * i40e_add_pd_table_entry - Adds page descriptor to the specified table
 127  * @hw: pointer to our HW structure
 128  * @hmc_info: pointer to the HMC configuration information structure
 129  * @pd_index: which page descriptor index to manipulate
 130  * @rsrc_pg: if not NULL, use preallocated page instead of allocating new one.
 131  *
 132  * This function:
 133  *      1. Initializes the pd entry
 134  *      2. Adds pd_entry in the pd_table
 135  *      3. Mark the entry valid in i40e_hmc_pd_entry structure
 136  *      4. Initializes the pd_entry's ref count to 1
 137  * assumptions:
 138  *      1. The memory for pd should be pinned down, physically contiguous and
 139  *         aligned on 4K boundary and zeroed memory.
 140  *      2. It should be 4K in size.
 141  **/
 142 enum i40e_status_code i40e_add_pd_table_entry(struct i40e_hw *hw,
 143                                               struct i40e_hmc_info *hmc_info,
 144                                               u32 pd_index,
 145                                               struct i40e_dma_mem *rsrc_pg)
 146 {
 147         enum i40e_status_code ret_code = I40E_SUCCESS;
 148         struct i40e_hmc_pd_table *pd_table;
 149         struct i40e_hmc_pd_entry *pd_entry;
 150         struct i40e_dma_mem mem;
 151         struct i40e_dma_mem *page = &mem;
 152         u32 sd_idx, rel_pd_idx;
 153         u64 *pd_addr;
 154         u64 page_desc;
 155
 156         if (pd_index / I40E_HMC_PD_CNT_IN_SD >= hmc_info->sd_table.sd_cnt) {
 157                 ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
 158                 DEBUGOUT("i40e_add_pd_table_entry: bad pd_index\n");
 159                 goto exit;
 160         }
 161
 162         /* find corresponding sd */
 163         sd_idx = (pd_index / I40E_HMC_PD_CNT_IN_SD);
 164         if (I40E_SD_TYPE_PAGED !=
 165             hmc_info->sd_table.sd_entry[sd_idx].entry_type)
 166                 goto exit;
 167
 168         rel_pd_idx = (pd_index % I40E_HMC_PD_CNT_IN_SD);
 169         pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
 170         pd_entry = &pd_table->pd_entry[rel_pd_idx];
 171         if (!pd_entry->valid) {
 172                 if (rsrc_pg) {
 173                         pd_entry->rsrc_pg = true;
 174                         page = rsrc_pg;
 175                 } else {
 176                         /* allocate a 4K backing page */
 177                         ret_code = i40e_allocate_dma_mem(hw, page, i40e_mem_bp,
 178                                                 I40E_HMC_PAGED_BP_SIZE,
 179                                                 I40E_HMC_PD_BP_BUF_ALIGNMENT);
 180                         if (ret_code)
 181                                 goto exit;
 182                         pd_entry->rsrc_pg = false;
 183                 }
 184
 185                 i40e_memcpy(&pd_entry->bp.addr, page,
 186                             sizeof(struct i40e_dma_mem), I40E_NONDMA_TO_NONDMA);
 187                 pd_entry->bp.sd_pd_index = pd_index;
 188                 pd_entry->bp.entry_type = I40E_SD_TYPE_PAGED;
 189                 /* Set page address and valid bit */
 190                 page_desc = page->pa | 0x1;
 191
 192                 pd_addr = (u64 *)pd_table->pd_page_addr.va;
 193                 pd_addr += rel_pd_idx;
 194
 195                 /* Add the backing page physical address in the pd entry */
 196                 i40e_memcpy(pd_addr, &page_desc, sizeof(u64),
 197                             I40E_NONDMA_TO_DMA);
 198
 199                 pd_entry->sd_index = sd_idx;
 200                 pd_entry->valid = true;
 201                 I40E_INC_PD_REFCNT(pd_table);
 202         }
 203         I40E_INC_BP_REFCNT(&pd_entry->bp);
 204 exit:
 205         return ret_code;
 206 }
 207
 208 /**
 209  * i40e_remove_pd_bp - remove a backing page from a page descriptor
 210  * @hw: pointer to our HW structure
 211  * @hmc_info: pointer to the HMC configuration information structure
 212  * @idx: the page index
 213  * @is_pf: distinguishes a VF from a PF
 214  *
 215  * This function:
 216  *      1. Marks the entry in pd tabe (for paged address mode) or in sd table
 217  *         (for direct address mode) invalid.
 218  *      2. Write to register PMPDINV to invalidate the backing page in FV cache
 219  *      3. Decrement the ref count for the pd _entry
 220  * assumptions:
 221  *      1. Caller can deallocate the memory used by backing storage after this
 222  *         function returns.
 223  **/
 224 enum i40e_status_code i40e_remove_pd_bp(struct i40e_hw *hw,
 225                                         struct i40e_hmc_info *hmc_info,
 226                                         u32 idx)
 227 {
 228         enum i40e_status_code ret_code = I40E_SUCCESS;
 229         struct i40e_hmc_pd_entry *pd_entry;
 230         struct i40e_hmc_pd_table *pd_table;
 231         struct i40e_hmc_sd_entry *sd_entry;
 232         u32 sd_idx, rel_pd_idx;
 233         u64 *pd_addr;
 234
 235         /* calculate index */
 236         sd_idx = idx / I40E_HMC_PD_CNT_IN_SD;
 237         rel_pd_idx = idx % I40E_HMC_PD_CNT_IN_SD;
 238         if (sd_idx >= hmc_info->sd_table.sd_cnt) {
 239                 ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
 240                 DEBUGOUT("i40e_remove_pd_bp: bad idx\n");
 241                 goto exit;
 242         }
 243         sd_entry = &hmc_info->sd_table.sd_entry[sd_idx];
 244         if (I40E_SD_TYPE_PAGED != sd_entry->entry_type) {
 245                 ret_code = I40E_ERR_INVALID_SD_TYPE;
 246                 DEBUGOUT("i40e_remove_pd_bp: wrong sd_entry type\n");
 247                 goto exit;
 248         }
 249         /* get the entry and decrease its ref counter */
 250         pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
 251         pd_entry = &pd_table->pd_entry[rel_pd_idx];
 252         I40E_DEC_BP_REFCNT(&pd_entry->bp);
 253         if (pd_entry->bp.ref_cnt)
 254                 goto exit;
 255
 256         /* mark the entry invalid */
 257         pd_entry->valid = false;
 258         I40E_DEC_PD_REFCNT(pd_table);
 259         pd_addr = (u64 *)pd_table->pd_page_addr.va;
 260         pd_addr += rel_pd_idx;
 261         i40e_memset(pd_addr, 0, sizeof(u64), I40E_DMA_MEM);
 262         I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx);
 263
 264         /* free memory here */
 265         if (!pd_entry->rsrc_pg)
 266                 ret_code = i40e_free_dma_mem(hw, &(pd_entry->bp.addr));
 267         if (I40E_SUCCESS != ret_code)
 268                 goto exit;
 269         if (!pd_table->ref_cnt)
 270                 i40e_free_virt_mem(hw, &pd_table->pd_entry_virt_mem);
 271 exit:
 272         return ret_code;
 273 }
 274
 275 /**
 276  * i40e_prep_remove_sd_bp - Prepares to remove a backing page from a sd entry
 277  * @hmc_info: pointer to the HMC configuration information structure
 278  * @idx: the page index
 279  **/
 280 enum i40e_status_code i40e_prep_remove_sd_bp(struct i40e_hmc_info *hmc_info,
 281                                              u32 idx)
 282 {
 283         enum i40e_status_code ret_code = I40E_SUCCESS;
 284         struct i40e_hmc_sd_entry *sd_entry;
 285
 286         /* get the entry and decrease its ref counter */
 287         sd_entry = &hmc_info->sd_table.sd_entry[idx];
 288         I40E_DEC_BP_REFCNT(&sd_entry->u.bp);
 289         if (sd_entry->u.bp.ref_cnt) {
 290                 ret_code = I40E_ERR_NOT_READY;
 291                 goto exit;
 292         }
 293         I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
 294
 295         /* mark the entry invalid */
 296         sd_entry->valid = false;
 297 exit:
 298         return ret_code;
 299 }
 300
 301 /**
 302  * i40e_remove_sd_bp_new - Removes a backing page from a segment descriptor
 303  * @hw: pointer to our hw struct
 304  * @hmc_info: pointer to the HMC configuration information structure
 305  * @idx: the page index
 306  * @is_pf: used to distinguish between VF and PF
 307  **/
 308 enum i40e_status_code i40e_remove_sd_bp_new(struct i40e_hw *hw,
 309                                             struct i40e_hmc_info *hmc_info,
 310                                             u32 idx, bool is_pf)
 311 {
 312         struct i40e_hmc_sd_entry *sd_entry;
 313
 314         if (!is_pf)
 315                 return I40E_NOT_SUPPORTED;
 316
 317         /* get the entry and decrease its ref counter */
 318         sd_entry = &hmc_info->sd_table.sd_entry[idx];
 319         I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_DIRECT);
 320
 321         return i40e_free_dma_mem(hw, &(sd_entry->u.bp.addr));
 322 }
 323
 324 /**
 325  * i40e_prep_remove_pd_page - Prepares to remove a PD page from sd entry.
 326  * @hmc_info: pointer to the HMC configuration information structure
 327  * @idx: segment descriptor index to find the relevant page descriptor
 328  **/
 329 enum i40e_status_code i40e_prep_remove_pd_page(struct i40e_hmc_info *hmc_info,
 330                                                u32 idx)
 331 {
 332         enum i40e_status_code ret_code = I40E_SUCCESS;
 333         struct i40e_hmc_sd_entry *sd_entry;
 334
 335         sd_entry = &hmc_info->sd_table.sd_entry[idx];
 336
 337         if (sd_entry->u.pd_table.ref_cnt) {
 338                 ret_code = I40E_ERR_NOT_READY;
 339                 goto exit;
 340         }
 341
 342         /* mark the entry invalid */
 343         sd_entry->valid = false;
 344
 345         I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
 346 exit:
 347         return ret_code;
 348 }
 349
 350 /**
 351  * i40e_remove_pd_page_new - Removes a PD page from sd entry.
 352  * @hw: pointer to our hw struct
 353  * @hmc_info: pointer to the HMC configuration information structure
 354  * @idx: segment descriptor index to find the relevant page descriptor
 355  * @is_pf: used to distinguish between VF and PF
 356  **/
 357 enum i40e_status_code i40e_remove_pd_page_new(struct i40e_hw *hw,
 358                                               struct i40e_hmc_info *hmc_info,
 359                                               u32 idx, bool is_pf)
 360 {
 361         struct i40e_hmc_sd_entry *sd_entry;
 362
 363         if (!is_pf)
 364                 return I40E_NOT_SUPPORTED;
 365
 366         sd_entry = &hmc_info->sd_table.sd_entry[idx];
 367         I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_PAGED);
 368
 369         return i40e_free_dma_mem(hw, &(sd_entry->u.pd_table.pd_page_addr));
 370 }