1 /******************************************************************************* 2 * 3 * Intel Ethernet Controller XL710 Family Linux Driver 4 * Copyright(c) 2013 - 2014 Intel Corporation. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along 16 * with this program. If not, see <http://www.gnu.org/licenses/>. 17 * 18 * The full GNU General Public License is included in this distribution in 19 * the file called "COPYING". 20 * 21 * Contact Information: 22 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 24 * 25 ******************************************************************************/ 26 27 #include "i40e_osdep.h" 28 #include "i40e_register.h" 29 #include "i40e_status.h" 30 #include "i40e_alloc.h" 31 #include "i40e_hmc.h" 32 #include "i40e_type.h" 33 34 /** 35 * i40e_add_sd_table_entry - Adds a segment descriptor to the table 36 * @hw: pointer to our hw struct 37 * @hmc_info: pointer to the HMC configuration information struct 38 * @sd_index: segment descriptor index to manipulate 39 * @type: what type of segment descriptor we're manipulating 40 * @direct_mode_sz: size to alloc in direct mode 41 **/ 42 i40e_status i40e_add_sd_table_entry(struct i40e_hw *hw, 43 struct i40e_hmc_info *hmc_info, 44 u32 sd_index, 45 enum i40e_sd_entry_type type, 46 u64 direct_mode_sz) 47 { 48 enum i40e_memory_type mem_type __attribute__((unused)); 49 struct i40e_hmc_sd_entry *sd_entry; 50 bool dma_mem_alloc_done = false; 51 struct i40e_dma_mem mem; 52 i40e_status ret_code; 53 u64 alloc_len; 54 55 if (NULL == hmc_info->sd_table.sd_entry) { 56 ret_code = I40E_ERR_BAD_PTR; 57 hw_dbg(hw, "i40e_add_sd_table_entry: bad sd_entry\n"); 58 goto exit; 59 } 60 61 if (sd_index >= hmc_info->sd_table.sd_cnt) { 62 ret_code = I40E_ERR_INVALID_SD_INDEX; 63 hw_dbg(hw, "i40e_add_sd_table_entry: bad sd_index\n"); 64 goto exit; 65 } 66 67 sd_entry = &hmc_info->sd_table.sd_entry[sd_index]; 68 if (!sd_entry->valid) { 69 if (I40E_SD_TYPE_PAGED == type) { 70 mem_type = i40e_mem_pd; 71 alloc_len = I40E_HMC_PAGED_BP_SIZE; 72 } else { 73 mem_type = i40e_mem_bp_jumbo; 74 alloc_len = direct_mode_sz; 75 } 76 77 /* allocate a 4K pd page or 2M backing page */ 78 ret_code = i40e_allocate_dma_mem(hw, &mem, mem_type, alloc_len, 79 I40E_HMC_PD_BP_BUF_ALIGNMENT); 80 if (ret_code) 81 goto exit; 82 dma_mem_alloc_done = true; 83 if (I40E_SD_TYPE_PAGED == type) { 84 ret_code = i40e_allocate_virt_mem(hw, 85 &sd_entry->u.pd_table.pd_entry_virt_mem, 86 sizeof(struct i40e_hmc_pd_entry) * 512); 87 if (ret_code) 88 goto exit; 89 sd_entry->u.pd_table.pd_entry = 90 (struct i40e_hmc_pd_entry *) 91 sd_entry->u.pd_table.pd_entry_virt_mem.va; 92 sd_entry->u.pd_table.pd_page_addr = mem; 93 } else { 94 sd_entry->u.bp.addr = mem; 95 sd_entry->u.bp.sd_pd_index = sd_index; 96 } 97 /* initialize the sd entry */ 98 hmc_info->sd_table.sd_entry[sd_index].entry_type = type; 99 100 /* increment the ref count */ 101 I40E_INC_SD_REFCNT(&hmc_info->sd_table); 102 } 103 /* Increment backing page reference count */ 104 if (I40E_SD_TYPE_DIRECT == sd_entry->entry_type) 105 I40E_INC_BP_REFCNT(&sd_entry->u.bp); 106 exit: 107 if (ret_code) 108 if (dma_mem_alloc_done) 109 i40e_free_dma_mem(hw, &mem); 110 111 return ret_code; 112 } 113 114 /** 115 * i40e_add_pd_table_entry - Adds page descriptor to the specified table 116 * @hw: pointer to our HW structure 117 * @hmc_info: pointer to the HMC configuration information structure 118 * @pd_index: which page descriptor index to manipulate 119 * 120 * This function: 121 * 1. Initializes the pd entry 122 * 2. Adds pd_entry in the pd_table 123 * 3. Mark the entry valid in i40e_hmc_pd_entry structure 124 * 4. Initializes the pd_entry's ref count to 1 125 * assumptions: 126 * 1. The memory for pd should be pinned down, physically contiguous and 127 * aligned on 4K boundary and zeroed memory. 128 * 2. It should be 4K in size. 129 **/ 130 i40e_status i40e_add_pd_table_entry(struct i40e_hw *hw, 131 struct i40e_hmc_info *hmc_info, 132 u32 pd_index) 133 { 134 i40e_status ret_code = 0; 135 struct i40e_hmc_pd_table *pd_table; 136 struct i40e_hmc_pd_entry *pd_entry; 137 struct i40e_dma_mem mem; 138 u32 sd_idx, rel_pd_idx; 139 u64 *pd_addr; 140 u64 page_desc; 141 142 if (pd_index / I40E_HMC_PD_CNT_IN_SD >= hmc_info->sd_table.sd_cnt) { 143 ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX; 144 hw_dbg(hw, "i40e_add_pd_table_entry: bad pd_index\n"); 145 goto exit; 146 } 147 148 /* find corresponding sd */ 149 sd_idx = (pd_index / I40E_HMC_PD_CNT_IN_SD); 150 if (I40E_SD_TYPE_PAGED != 151 hmc_info->sd_table.sd_entry[sd_idx].entry_type) 152 goto exit; 153 154 rel_pd_idx = (pd_index % I40E_HMC_PD_CNT_IN_SD); 155 pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table; 156 pd_entry = &pd_table->pd_entry[rel_pd_idx]; 157 if (!pd_entry->valid) { 158 /* allocate a 4K backing page */ 159 ret_code = i40e_allocate_dma_mem(hw, &mem, i40e_mem_bp, 160 I40E_HMC_PAGED_BP_SIZE, 161 I40E_HMC_PD_BP_BUF_ALIGNMENT); 162 if (ret_code) 163 goto exit; 164 165 pd_entry->bp.addr = mem; 166 pd_entry->bp.sd_pd_index = pd_index; 167 pd_entry->bp.entry_type = I40E_SD_TYPE_PAGED; 168 /* Set page address and valid bit */ 169 page_desc = mem.pa | 0x1; 170 171 pd_addr = (u64 *)pd_table->pd_page_addr.va; 172 pd_addr += rel_pd_idx; 173 174 /* Add the backing page physical address in the pd entry */ 175 memcpy(pd_addr, &page_desc, sizeof(u64)); 176 177 pd_entry->sd_index = sd_idx; 178 pd_entry->valid = true; 179 I40E_INC_PD_REFCNT(pd_table); 180 } 181 I40E_INC_BP_REFCNT(&pd_entry->bp); 182 exit: 183 return ret_code; 184 } 185 186 /** 187 * i40e_remove_pd_bp - remove a backing page from a page descriptor 188 * @hw: pointer to our HW structure 189 * @hmc_info: pointer to the HMC configuration information structure 190 * @idx: the page index 191 * @is_pf: distinguishes a VF from a PF 192 * 193 * This function: 194 * 1. Marks the entry in pd tabe (for paged address mode) or in sd table 195 * (for direct address mode) invalid. 196 * 2. Write to register PMPDINV to invalidate the backing page in FV cache 197 * 3. Decrement the ref count for the pd _entry 198 * assumptions: 199 * 1. Caller can deallocate the memory used by backing storage after this 200 * function returns. 201 **/ 202 i40e_status i40e_remove_pd_bp(struct i40e_hw *hw, 203 struct i40e_hmc_info *hmc_info, 204 u32 idx) 205 { 206 i40e_status ret_code = 0; 207 struct i40e_hmc_pd_entry *pd_entry; 208 struct i40e_hmc_pd_table *pd_table; 209 struct i40e_hmc_sd_entry *sd_entry; 210 u32 sd_idx, rel_pd_idx; 211 u64 *pd_addr; 212 213 /* calculate index */ 214 sd_idx = idx / I40E_HMC_PD_CNT_IN_SD; 215 rel_pd_idx = idx % I40E_HMC_PD_CNT_IN_SD; 216 if (sd_idx >= hmc_info->sd_table.sd_cnt) { 217 ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX; 218 hw_dbg(hw, "i40e_remove_pd_bp: bad idx\n"); 219 goto exit; 220 } 221 sd_entry = &hmc_info->sd_table.sd_entry[sd_idx]; 222 if (I40E_SD_TYPE_PAGED != sd_entry->entry_type) { 223 ret_code = I40E_ERR_INVALID_SD_TYPE; 224 hw_dbg(hw, "i40e_remove_pd_bp: wrong sd_entry type\n"); 225 goto exit; 226 } 227 /* get the entry and decrease its ref counter */ 228 pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table; 229 pd_entry = &pd_table->pd_entry[rel_pd_idx]; 230 I40E_DEC_BP_REFCNT(&pd_entry->bp); 231 if (pd_entry->bp.ref_cnt) 232 goto exit; 233 234 /* mark the entry invalid */ 235 pd_entry->valid = false; 236 I40E_DEC_PD_REFCNT(pd_table); 237 pd_addr = (u64 *)pd_table->pd_page_addr.va; 238 pd_addr += rel_pd_idx; 239 memset(pd_addr, 0, sizeof(u64)); 240 I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx); 241 242 /* free memory here */ 243 ret_code = i40e_free_dma_mem(hw, &(pd_entry->bp.addr)); 244 if (ret_code) 245 goto exit; 246 if (!pd_table->ref_cnt) 247 i40e_free_virt_mem(hw, &pd_table->pd_entry_virt_mem); 248 exit: 249 return ret_code; 250 } 251 252 /** 253 * i40e_prep_remove_sd_bp - Prepares to remove a backing page from a sd entry 254 * @hmc_info: pointer to the HMC configuration information structure 255 * @idx: the page index 256 **/ 257 i40e_status i40e_prep_remove_sd_bp(struct i40e_hmc_info *hmc_info, 258 u32 idx) 259 { 260 i40e_status ret_code = 0; 261 struct i40e_hmc_sd_entry *sd_entry; 262 263 /* get the entry and decrease its ref counter */ 264 sd_entry = &hmc_info->sd_table.sd_entry[idx]; 265 I40E_DEC_BP_REFCNT(&sd_entry->u.bp); 266 if (sd_entry->u.bp.ref_cnt) { 267 ret_code = I40E_ERR_NOT_READY; 268 goto exit; 269 } 270 I40E_DEC_SD_REFCNT(&hmc_info->sd_table); 271 272 /* mark the entry invalid */ 273 sd_entry->valid = false; 274 exit: 275 return ret_code; 276 } 277 278 /** 279 * i40e_remove_sd_bp_new - Removes a backing page from a segment descriptor 280 * @hw: pointer to our hw struct 281 * @hmc_info: pointer to the HMC configuration information structure 282 * @idx: the page index 283 * @is_pf: used to distinguish between VF and PF 284 **/ 285 i40e_status i40e_remove_sd_bp_new(struct i40e_hw *hw, 286 struct i40e_hmc_info *hmc_info, 287 u32 idx, bool is_pf) 288 { 289 struct i40e_hmc_sd_entry *sd_entry; 290 i40e_status ret_code = 0; 291 292 /* get the entry and decrease its ref counter */ 293 sd_entry = &hmc_info->sd_table.sd_entry[idx]; 294 if (is_pf) { 295 I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_DIRECT); 296 } else { 297 ret_code = I40E_NOT_SUPPORTED; 298 goto exit; 299 } 300 ret_code = i40e_free_dma_mem(hw, &(sd_entry->u.bp.addr)); 301 if (ret_code) 302 goto exit; 303 exit: 304 return ret_code; 305 } 306 307 /** 308 * i40e_prep_remove_pd_page - Prepares to remove a PD page from sd entry. 309 * @hmc_info: pointer to the HMC configuration information structure 310 * @idx: segment descriptor index to find the relevant page descriptor 311 **/ 312 i40e_status i40e_prep_remove_pd_page(struct i40e_hmc_info *hmc_info, 313 u32 idx) 314 { 315 i40e_status ret_code = 0; 316 struct i40e_hmc_sd_entry *sd_entry; 317 318 sd_entry = &hmc_info->sd_table.sd_entry[idx]; 319 320 if (sd_entry->u.pd_table.ref_cnt) { 321 ret_code = I40E_ERR_NOT_READY; 322 goto exit; 323 } 324 325 /* mark the entry invalid */ 326 sd_entry->valid = false; 327 328 I40E_DEC_SD_REFCNT(&hmc_info->sd_table); 329 exit: 330 return ret_code; 331 } 332 333 /** 334 * i40e_remove_pd_page_new - Removes a PD page from sd entry. 335 * @hw: pointer to our hw struct 336 * @hmc_info: pointer to the HMC configuration information structure 337 * @idx: segment descriptor index to find the relevant page descriptor 338 * @is_pf: used to distinguish between VF and PF 339 **/ 340 i40e_status i40e_remove_pd_page_new(struct i40e_hw *hw, 341 struct i40e_hmc_info *hmc_info, 342 u32 idx, bool is_pf) 343 { 344 i40e_status ret_code = 0; 345 struct i40e_hmc_sd_entry *sd_entry; 346 347 sd_entry = &hmc_info->sd_table.sd_entry[idx]; 348 if (is_pf) { 349 I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_PAGED); 350 } else { 351 ret_code = I40E_NOT_SUPPORTED; 352 goto exit; 353 } 354 /* free memory here */ 355 ret_code = i40e_free_dma_mem(hw, &(sd_entry->u.pd_table.pd_page_addr)); 356 if (ret_code) 357 goto exit; 358 exit: 359 return ret_code; 360 } 361