sys/dev/ixl/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 /*$FreeBSD$*/
  34
  35 #include "i40e_osdep.h"
  36 #include "i40e_register.h"
  37 #include "i40e_status.h"
  38 #include "i40e_alloc.h"
  39 #include "i40e_hmc.h"
  40 #include "i40e_type.h"
  41
  42 /**
  43  * i40e_add_sd_table_entry - Adds a segment descriptor to the table
  44  * @hw: pointer to our hw struct
  45  * @hmc_info: pointer to the HMC configuration information struct
  46  * @sd_index: segment descriptor index to manipulate
  47  * @type: what type of segment descriptor we're manipulating
  48  * @direct_mode_sz: size to alloc in direct mode
  49  **/
  50 enum i40e_status_code i40e_add_sd_table_entry(struct i40e_hw *hw,
  51                                               struct i40e_hmc_info *hmc_info,
  52                                               u32 sd_index,
  53                                               enum i40e_sd_entry_type type,
  54                                               u64 direct_mode_sz)
  55 {
  56         enum i40e_status_code ret_code = I40E_SUCCESS;
  57         struct i40e_hmc_sd_entry *sd_entry;
  58         enum   i40e_memory_type mem_type;
  59         bool dma_mem_alloc_done = FALSE;
  60         struct i40e_dma_mem mem;
  61         u64 alloc_len;
  62
  63         if (NULL == hmc_info->sd_table.sd_entry) {
  64                 ret_code = I40E_ERR_BAD_PTR;
  65                 DEBUGOUT("i40e_add_sd_table_entry: bad sd_entry\n");
  66                 goto exit;
  67         }
  68
  69         if (sd_index >= hmc_info->sd_table.sd_cnt) {
  70                 ret_code = I40E_ERR_INVALID_SD_INDEX;
  71                 DEBUGOUT("i40e_add_sd_table_entry: bad sd_index\n");
  72                 goto exit;
  73         }
  74
  75         sd_entry = &hmc_info->sd_table.sd_entry[sd_index];
  76         if (!sd_entry->valid) {
  77                 if (I40E_SD_TYPE_PAGED == type) {
  78                         mem_type = i40e_mem_pd;
  79                         alloc_len = I40E_HMC_PAGED_BP_SIZE;
  80                 } else {
  81                         mem_type = i40e_mem_bp_jumbo;
  82                         alloc_len = direct_mode_sz;
  83                 }
  84
  85                 /* allocate a 4K pd page or 2M backing page */
  86                 ret_code = i40e_allocate_dma_mem(hw, &mem, mem_type, alloc_len,
  87                                                  I40E_HMC_PD_BP_BUF_ALIGNMENT);
  88                 if (ret_code)
  89                         goto exit;
  90                 dma_mem_alloc_done = TRUE;
  91                 if (I40E_SD_TYPE_PAGED == type) {
  92                         ret_code = i40e_allocate_virt_mem(hw,
  93                                         &sd_entry->u.pd_table.pd_entry_virt_mem,
  94                                         sizeof(struct i40e_hmc_pd_entry) * 512);
  95                         if (ret_code)
  96                                 goto exit;
  97                         sd_entry->u.pd_table.pd_entry =
  98                                 (struct i40e_hmc_pd_entry *)
  99                                 sd_entry->u.pd_table.pd_entry_virt_mem.va;
 100                         i40e_memcpy(&sd_entry->u.pd_table.pd_page_addr,
 101                                     &mem, sizeof(struct i40e_dma_mem),
 102                                     I40E_NONDMA_TO_NONDMA);
 103                 } else {
 104                         i40e_memcpy(&sd_entry->u.bp.addr,
 105                                     &mem, sizeof(struct i40e_dma_mem),
 106                                     I40E_NONDMA_TO_NONDMA);
 107                         sd_entry->u.bp.sd_pd_index = sd_index;
 108                 }
 109                 /* initialize the sd entry */
 110                 hmc_info->sd_table.sd_entry[sd_index].entry_type = type;
 111
 112                 /* increment the ref count */
 113                 I40E_INC_SD_REFCNT(&hmc_info->sd_table);
 114         }
 115         /* Increment backing page reference count */
 116         if (I40E_SD_TYPE_DIRECT == sd_entry->entry_type)
 117                 I40E_INC_BP_REFCNT(&sd_entry->u.bp);
 118 exit:
 119         if (I40E_SUCCESS != ret_code)
 120                 if (dma_mem_alloc_done)
 121                         i40e_free_dma_mem(hw, &mem);
 122
 123         return ret_code;
 124 }
 125
 126 /**
 127  * i40e_add_pd_table_entry - Adds page descriptor to the specified table
 128  * @hw: pointer to our HW structure
 129  * @hmc_info: pointer to the HMC configuration information structure
 130  * @pd_index: which page descriptor index to manipulate
 131  * @rsrc_pg: if not NULL, use preallocated page instead of allocating new one.
 132  *
 133  * This function:
 134  *      1. Initializes the pd entry
 135  *      2. Adds pd_entry in the pd_table
 136  *      3. Mark the entry valid in i40e_hmc_pd_entry structure
 137  *      4. Initializes the pd_entry's ref count to 1
 138  * assumptions:
 139  *      1. The memory for pd should be pinned down, physically contiguous and
 140  *         aligned on 4K boundary and zeroed memory.
 141  *      2. It should be 4K in size.
 142  **/
 143 enum i40e_status_code i40e_add_pd_table_entry(struct i40e_hw *hw,
 144                                               struct i40e_hmc_info *hmc_info,
 145                                               u32 pd_index,
 146                                               struct i40e_dma_mem *rsrc_pg)
 147 {
 148         enum i40e_status_code ret_code = I40E_SUCCESS;
 149         struct i40e_hmc_pd_table *pd_table;
 150         struct i40e_hmc_pd_entry *pd_entry;
 151         struct i40e_dma_mem mem;
 152         struct i40e_dma_mem *page = &mem;
 153         u32 sd_idx, rel_pd_idx;
 154         u64 *pd_addr;
 155         u64 page_desc;
 156
 157         if (pd_index / I40E_HMC_PD_CNT_IN_SD >= hmc_info->sd_table.sd_cnt) {
 158                 ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
 159                 DEBUGOUT("i40e_add_pd_table_entry: bad pd_index\n");
 160                 goto exit;
 161         }
 162
 163         /* find corresponding sd */
 164         sd_idx = (pd_index / I40E_HMC_PD_CNT_IN_SD);
 165         if (I40E_SD_TYPE_PAGED !=
 166             hmc_info->sd_table.sd_entry[sd_idx].entry_type)
 167                 goto exit;
 168
 169         rel_pd_idx = (pd_index % I40E_HMC_PD_CNT_IN_SD);
 170         pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
 171         pd_entry = &pd_table->pd_entry[rel_pd_idx];
 172         if (!pd_entry->valid) {
 173                 if (rsrc_pg) {
 174                         pd_entry->rsrc_pg = TRUE;
 175                         page = rsrc_pg;
 176                 } else {
 177                         /* allocate a 4K backing page */
 178                         ret_code = i40e_allocate_dma_mem(hw, page, i40e_mem_bp,
 179                                                 I40E_HMC_PAGED_BP_SIZE,
 180                                                 I40E_HMC_PD_BP_BUF_ALIGNMENT);
 181                         if (ret_code)
 182                                 goto exit;
 183                         pd_entry->rsrc_pg = FALSE;
 184                 }
 185
 186                 i40e_memcpy(&pd_entry->bp.addr, page,
 187                             sizeof(struct i40e_dma_mem), I40E_NONDMA_TO_NONDMA);
 188                 pd_entry->bp.sd_pd_index = pd_index;
 189                 pd_entry->bp.entry_type = I40E_SD_TYPE_PAGED;
 190                 /* Set page address and valid bit */
 191                 page_desc = page->pa | 0x1;
 192
 193                 pd_addr = (u64 *)pd_table->pd_page_addr.va;
 194                 pd_addr += rel_pd_idx;
 195
 196                 /* Add the backing page physical address in the pd entry */
 197                 i40e_memcpy(pd_addr, &page_desc, sizeof(u64),
 198                             I40E_NONDMA_TO_DMA);
 199
 200                 pd_entry->sd_index = sd_idx;
 201                 pd_entry->valid = TRUE;
 202                 I40E_INC_PD_REFCNT(pd_table);
 203         }
 204         I40E_INC_BP_REFCNT(&pd_entry->bp);
 205 exit:
 206         return ret_code;
 207 }
 208
 209 /**
 210  * i40e_remove_pd_bp - remove a backing page from a page descriptor
 211  * @hw: pointer to our HW structure
 212  * @hmc_info: pointer to the HMC configuration information structure
 213  * @idx: the page index
 214  * @is_pf: distinguishes a VF from a PF
 215  *
 216  * This function:
 217  *      1. Marks the entry in pd tabe (for paged address mode) or in sd table
 218  *         (for direct address mode) invalid.
 219  *      2. Write to register PMPDINV to invalidate the backing page in FV cache
 220  *      3. Decrement the ref count for the pd _entry
 221  * assumptions:
 222  *      1. Caller can deallocate the memory used by backing storage after this
 223  *         function returns.
 224  **/
 225 enum i40e_status_code i40e_remove_pd_bp(struct i40e_hw *hw,
 226                                         struct i40e_hmc_info *hmc_info,
 227                                         u32 idx)
 228 {
 229         enum i40e_status_code ret_code = I40E_SUCCESS;
 230         struct i40e_hmc_pd_entry *pd_entry;
 231         struct i40e_hmc_pd_table *pd_table;
 232         struct i40e_hmc_sd_entry *sd_entry;
 233         u32 sd_idx, rel_pd_idx;
 234         u64 *pd_addr;
 235
 236         /* calculate index */
 237         sd_idx = idx / I40E_HMC_PD_CNT_IN_SD;
 238         rel_pd_idx = idx % I40E_HMC_PD_CNT_IN_SD;
 239         if (sd_idx >= hmc_info->sd_table.sd_cnt) {
 240                 ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
 241                 DEBUGOUT("i40e_remove_pd_bp: bad idx\n");
 242                 goto exit;
 243         }
 244         sd_entry = &hmc_info->sd_table.sd_entry[sd_idx];
 245         if (I40E_SD_TYPE_PAGED != sd_entry->entry_type) {
 246                 ret_code = I40E_ERR_INVALID_SD_TYPE;
 247                 DEBUGOUT("i40e_remove_pd_bp: wrong sd_entry type\n");
 248                 goto exit;
 249         }
 250         /* get the entry and decrease its ref counter */
 251         pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
 252         pd_entry = &pd_table->pd_entry[rel_pd_idx];
 253         I40E_DEC_BP_REFCNT(&pd_entry->bp);
 254         if (pd_entry->bp.ref_cnt)
 255                 goto exit;
 256
 257         /* mark the entry invalid */
 258         pd_entry->valid = FALSE;
 259         I40E_DEC_PD_REFCNT(pd_table);
 260         pd_addr = (u64 *)pd_table->pd_page_addr.va;
 261         pd_addr += rel_pd_idx;
 262         i40e_memset(pd_addr, 0, sizeof(u64), I40E_DMA_MEM);
 263         I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx);
 264
 265         /* free memory here */
 266         if (!pd_entry->rsrc_pg)
 267                 ret_code = i40e_free_dma_mem(hw, &(pd_entry->bp.addr));
 268         if (I40E_SUCCESS != ret_code)
 269                 goto exit;
 270         if (!pd_table->ref_cnt)
 271                 i40e_free_virt_mem(hw, &pd_table->pd_entry_virt_mem);
 272 exit:
 273         return ret_code;
 274 }
 275
 276 /**
 277  * i40e_prep_remove_sd_bp - Prepares to remove a backing page from a sd entry
 278  * @hmc_info: pointer to the HMC configuration information structure
 279  * @idx: the page index
 280  **/
 281 enum i40e_status_code i40e_prep_remove_sd_bp(struct i40e_hmc_info *hmc_info,
 282                                              u32 idx)
 283 {
 284         enum i40e_status_code ret_code = I40E_SUCCESS;
 285         struct i40e_hmc_sd_entry *sd_entry;
 286
 287         /* get the entry and decrease its ref counter */
 288         sd_entry = &hmc_info->sd_table.sd_entry[idx];
 289         I40E_DEC_BP_REFCNT(&sd_entry->u.bp);
 290         if (sd_entry->u.bp.ref_cnt) {
 291                 ret_code = I40E_ERR_NOT_READY;
 292                 goto exit;
 293         }
 294         I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
 295
 296         /* mark the entry invalid */
 297         sd_entry->valid = FALSE;
 298 exit:
 299         return ret_code;
 300 }
 301
 302 /**
 303  * i40e_remove_sd_bp_new - Removes a backing page from a segment descriptor
 304  * @hw: pointer to our hw struct
 305  * @hmc_info: pointer to the HMC configuration information structure
 306  * @idx: the page index
 307  * @is_pf: used to distinguish between VF and PF
 308  **/
 309 enum i40e_status_code i40e_remove_sd_bp_new(struct i40e_hw *hw,
 310                                             struct i40e_hmc_info *hmc_info,
 311                                             u32 idx, bool is_pf)
 312 {
 313         struct i40e_hmc_sd_entry *sd_entry;
 314
 315         if (!is_pf)
 316                 return I40E_NOT_SUPPORTED;
 317
 318         /* get the entry and decrease its ref counter */
 319         sd_entry = &hmc_info->sd_table.sd_entry[idx];
 320         I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_DIRECT);
 321
 322         return i40e_free_dma_mem(hw, &(sd_entry->u.bp.addr));
 323 }
 324
 325 /**
 326  * i40e_prep_remove_pd_page - Prepares to remove a PD page from sd entry.
 327  * @hmc_info: pointer to the HMC configuration information structure
 328  * @idx: segment descriptor index to find the relevant page descriptor
 329  **/
 330 enum i40e_status_code i40e_prep_remove_pd_page(struct i40e_hmc_info *hmc_info,
 331                                                u32 idx)
 332 {
 333         enum i40e_status_code ret_code = I40E_SUCCESS;
 334         struct i40e_hmc_sd_entry *sd_entry;
 335
 336         sd_entry = &hmc_info->sd_table.sd_entry[idx];
 337
 338         if (sd_entry->u.pd_table.ref_cnt) {
 339                 ret_code = I40E_ERR_NOT_READY;
 340                 goto exit;
 341         }
 342
 343         /* mark the entry invalid */
 344         sd_entry->valid = FALSE;
 345
 346         I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
 347 exit:
 348         return ret_code;
 349 }
 350
 351 /**
 352  * i40e_remove_pd_page_new - Removes a PD page from sd entry.
 353  * @hw: pointer to our hw struct
 354  * @hmc_info: pointer to the HMC configuration information structure
 355  * @idx: segment descriptor index to find the relevant page descriptor
 356  * @is_pf: used to distinguish between VF and PF
 357  **/
 358 enum i40e_status_code i40e_remove_pd_page_new(struct i40e_hw *hw,
 359                                               struct i40e_hmc_info *hmc_info,
 360                                               u32 idx, bool is_pf)
 361 {
 362         struct i40e_hmc_sd_entry *sd_entry;
 363
 364         if (!is_pf)
 365                 return I40E_NOT_SUPPORTED;
 366
 367         sd_entry = &hmc_info->sd_table.sd_entry[idx];
 368         I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_PAGED);
 369
 370         return i40e_free_dma_mem(hw, &(sd_entry->u.pd_table.pd_page_addr));
 371 }