Loading...
Note: File does not exist in v3.1.
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 **/
42i40e_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);
106exit:
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 * @rsrc_pg: if not NULL, use preallocated page instead of allocating new one.
120 *
121 * This function:
122 * 1. Initializes the pd entry
123 * 2. Adds pd_entry in the pd_table
124 * 3. Mark the entry valid in i40e_hmc_pd_entry structure
125 * 4. Initializes the pd_entry's ref count to 1
126 * assumptions:
127 * 1. The memory for pd should be pinned down, physically contiguous and
128 * aligned on 4K boundary and zeroed memory.
129 * 2. It should be 4K in size.
130 **/
131i40e_status i40e_add_pd_table_entry(struct i40e_hw *hw,
132 struct i40e_hmc_info *hmc_info,
133 u32 pd_index,
134 struct i40e_dma_mem *rsrc_pg)
135{
136 i40e_status ret_code = 0;
137 struct i40e_hmc_pd_table *pd_table;
138 struct i40e_hmc_pd_entry *pd_entry;
139 struct i40e_dma_mem mem;
140 struct i40e_dma_mem *page = &mem;
141 u32 sd_idx, rel_pd_idx;
142 u64 *pd_addr;
143 u64 page_desc;
144
145 if (pd_index / I40E_HMC_PD_CNT_IN_SD >= hmc_info->sd_table.sd_cnt) {
146 ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
147 hw_dbg(hw, "i40e_add_pd_table_entry: bad pd_index\n");
148 goto exit;
149 }
150
151 /* find corresponding sd */
152 sd_idx = (pd_index / I40E_HMC_PD_CNT_IN_SD);
153 if (I40E_SD_TYPE_PAGED !=
154 hmc_info->sd_table.sd_entry[sd_idx].entry_type)
155 goto exit;
156
157 rel_pd_idx = (pd_index % I40E_HMC_PD_CNT_IN_SD);
158 pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
159 pd_entry = &pd_table->pd_entry[rel_pd_idx];
160 if (!pd_entry->valid) {
161 if (rsrc_pg) {
162 pd_entry->rsrc_pg = true;
163 page = rsrc_pg;
164 } else {
165 /* allocate a 4K backing page */
166 ret_code = i40e_allocate_dma_mem(hw, page, i40e_mem_bp,
167 I40E_HMC_PAGED_BP_SIZE,
168 I40E_HMC_PD_BP_BUF_ALIGNMENT);
169 if (ret_code)
170 goto exit;
171 pd_entry->rsrc_pg = false;
172 }
173
174 pd_entry->bp.addr = *page;
175 pd_entry->bp.sd_pd_index = pd_index;
176 pd_entry->bp.entry_type = I40E_SD_TYPE_PAGED;
177 /* Set page address and valid bit */
178 page_desc = page->pa | 0x1;
179
180 pd_addr = (u64 *)pd_table->pd_page_addr.va;
181 pd_addr += rel_pd_idx;
182
183 /* Add the backing page physical address in the pd entry */
184 memcpy(pd_addr, &page_desc, sizeof(u64));
185
186 pd_entry->sd_index = sd_idx;
187 pd_entry->valid = true;
188 I40E_INC_PD_REFCNT(pd_table);
189 }
190 I40E_INC_BP_REFCNT(&pd_entry->bp);
191exit:
192 return ret_code;
193}
194
195/**
196 * i40e_remove_pd_bp - remove a backing page from a page descriptor
197 * @hw: pointer to our HW structure
198 * @hmc_info: pointer to the HMC configuration information structure
199 * @idx: the page index
200 * @is_pf: distinguishes a VF from a PF
201 *
202 * This function:
203 * 1. Marks the entry in pd tabe (for paged address mode) or in sd table
204 * (for direct address mode) invalid.
205 * 2. Write to register PMPDINV to invalidate the backing page in FV cache
206 * 3. Decrement the ref count for the pd _entry
207 * assumptions:
208 * 1. Caller can deallocate the memory used by backing storage after this
209 * function returns.
210 **/
211i40e_status i40e_remove_pd_bp(struct i40e_hw *hw,
212 struct i40e_hmc_info *hmc_info,
213 u32 idx)
214{
215 i40e_status ret_code = 0;
216 struct i40e_hmc_pd_entry *pd_entry;
217 struct i40e_hmc_pd_table *pd_table;
218 struct i40e_hmc_sd_entry *sd_entry;
219 u32 sd_idx, rel_pd_idx;
220 u64 *pd_addr;
221
222 /* calculate index */
223 sd_idx = idx / I40E_HMC_PD_CNT_IN_SD;
224 rel_pd_idx = idx % I40E_HMC_PD_CNT_IN_SD;
225 if (sd_idx >= hmc_info->sd_table.sd_cnt) {
226 ret_code = I40E_ERR_INVALID_PAGE_DESC_INDEX;
227 hw_dbg(hw, "i40e_remove_pd_bp: bad idx\n");
228 goto exit;
229 }
230 sd_entry = &hmc_info->sd_table.sd_entry[sd_idx];
231 if (I40E_SD_TYPE_PAGED != sd_entry->entry_type) {
232 ret_code = I40E_ERR_INVALID_SD_TYPE;
233 hw_dbg(hw, "i40e_remove_pd_bp: wrong sd_entry type\n");
234 goto exit;
235 }
236 /* get the entry and decrease its ref counter */
237 pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
238 pd_entry = &pd_table->pd_entry[rel_pd_idx];
239 I40E_DEC_BP_REFCNT(&pd_entry->bp);
240 if (pd_entry->bp.ref_cnt)
241 goto exit;
242
243 /* mark the entry invalid */
244 pd_entry->valid = false;
245 I40E_DEC_PD_REFCNT(pd_table);
246 pd_addr = (u64 *)pd_table->pd_page_addr.va;
247 pd_addr += rel_pd_idx;
248 memset(pd_addr, 0, sizeof(u64));
249 I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx);
250
251 /* free memory here */
252 if (!pd_entry->rsrc_pg)
253 ret_code = i40e_free_dma_mem(hw, &pd_entry->bp.addr);
254 if (ret_code)
255 goto exit;
256 if (!pd_table->ref_cnt)
257 i40e_free_virt_mem(hw, &pd_table->pd_entry_virt_mem);
258exit:
259 return ret_code;
260}
261
262/**
263 * i40e_prep_remove_sd_bp - Prepares to remove a backing page from a sd entry
264 * @hmc_info: pointer to the HMC configuration information structure
265 * @idx: the page index
266 **/
267i40e_status i40e_prep_remove_sd_bp(struct i40e_hmc_info *hmc_info,
268 u32 idx)
269{
270 i40e_status ret_code = 0;
271 struct i40e_hmc_sd_entry *sd_entry;
272
273 /* get the entry and decrease its ref counter */
274 sd_entry = &hmc_info->sd_table.sd_entry[idx];
275 I40E_DEC_BP_REFCNT(&sd_entry->u.bp);
276 if (sd_entry->u.bp.ref_cnt) {
277 ret_code = I40E_ERR_NOT_READY;
278 goto exit;
279 }
280 I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
281
282 /* mark the entry invalid */
283 sd_entry->valid = false;
284exit:
285 return ret_code;
286}
287
288/**
289 * i40e_remove_sd_bp_new - Removes a backing page from a segment descriptor
290 * @hw: pointer to our hw struct
291 * @hmc_info: pointer to the HMC configuration information structure
292 * @idx: the page index
293 * @is_pf: used to distinguish between VF and PF
294 **/
295i40e_status i40e_remove_sd_bp_new(struct i40e_hw *hw,
296 struct i40e_hmc_info *hmc_info,
297 u32 idx, bool is_pf)
298{
299 struct i40e_hmc_sd_entry *sd_entry;
300
301 if (!is_pf)
302 return I40E_NOT_SUPPORTED;
303
304 /* get the entry and decrease its ref counter */
305 sd_entry = &hmc_info->sd_table.sd_entry[idx];
306 I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_DIRECT);
307
308 return i40e_free_dma_mem(hw, &sd_entry->u.bp.addr);
309}
310
311/**
312 * i40e_prep_remove_pd_page - Prepares to remove a PD page from sd entry.
313 * @hmc_info: pointer to the HMC configuration information structure
314 * @idx: segment descriptor index to find the relevant page descriptor
315 **/
316i40e_status i40e_prep_remove_pd_page(struct i40e_hmc_info *hmc_info,
317 u32 idx)
318{
319 i40e_status ret_code = 0;
320 struct i40e_hmc_sd_entry *sd_entry;
321
322 sd_entry = &hmc_info->sd_table.sd_entry[idx];
323
324 if (sd_entry->u.pd_table.ref_cnt) {
325 ret_code = I40E_ERR_NOT_READY;
326 goto exit;
327 }
328
329 /* mark the entry invalid */
330 sd_entry->valid = false;
331
332 I40E_DEC_SD_REFCNT(&hmc_info->sd_table);
333exit:
334 return ret_code;
335}
336
337/**
338 * i40e_remove_pd_page_new - Removes a PD page from sd entry.
339 * @hw: pointer to our hw struct
340 * @hmc_info: pointer to the HMC configuration information structure
341 * @idx: segment descriptor index to find the relevant page descriptor
342 * @is_pf: used to distinguish between VF and PF
343 **/
344i40e_status i40e_remove_pd_page_new(struct i40e_hw *hw,
345 struct i40e_hmc_info *hmc_info,
346 u32 idx, bool is_pf)
347{
348 struct i40e_hmc_sd_entry *sd_entry;
349
350 if (!is_pf)
351 return I40E_NOT_SUPPORTED;
352
353 sd_entry = &hmc_info->sd_table.sd_entry[idx];
354 I40E_CLEAR_PF_SD_ENTRY(hw, idx, I40E_SD_TYPE_PAGED);
355
356 return i40e_free_dma_mem(hw, &sd_entry->u.pd_table.pd_page_addr);
357}