Commit | Line | Data |
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c3673464 KX |
1 | /* |
2 | * cxgb3i_ddp.c: Chelsio S3xx iSCSI DDP Manager. | |
3 | * | |
4 | * Copyright (c) 2008 Chelsio Communications, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation. | |
9 | * | |
10 | * Written by: Karen Xie (kxie@chelsio.com) | |
11 | */ | |
12 | ||
13 | #include <linux/skbuff.h> | |
574df408 | 14 | #include <linux/scatterlist.h> |
c3673464 KX |
15 | |
16 | /* from cxgb3 LLD */ | |
17 | #include "common.h" | |
18 | #include "t3_cpl.h" | |
19 | #include "t3cdev.h" | |
20 | #include "cxgb3_ctl_defs.h" | |
21 | #include "cxgb3_offload.h" | |
22 | #include "firmware_exports.h" | |
23 | ||
24 | #include "cxgb3i_ddp.h" | |
25 | ||
c3673464 KX |
26 | #define ddp_log_error(fmt...) printk(KERN_ERR "cxgb3i_ddp: ERR! " fmt) |
27 | #define ddp_log_warn(fmt...) printk(KERN_WARNING "cxgb3i_ddp: WARN! " fmt) | |
28 | #define ddp_log_info(fmt...) printk(KERN_INFO "cxgb3i_ddp: " fmt) | |
29 | ||
30 | #ifdef __DEBUG_CXGB3I_DDP__ | |
31 | #define ddp_log_debug(fmt, args...) \ | |
32 | printk(KERN_INFO "cxgb3i_ddp: %s - " fmt, __func__ , ## args) | |
33 | #else | |
34 | #define ddp_log_debug(fmt...) | |
35 | #endif | |
36 | ||
37 | /* | |
38 | * iSCSI Direct Data Placement | |
39 | * | |
40 | * T3 h/w can directly place the iSCSI Data-In or Data-Out PDU's payload into | |
41 | * pre-posted final destination host-memory buffers based on the Initiator | |
42 | * Task Tag (ITT) in Data-In or Target Task Tag (TTT) in Data-Out PDUs. | |
43 | * | |
44 | * The host memory address is programmed into h/w in the format of pagepod | |
45 | * entries. | |
46 | * The location of the pagepod entry is encoded into ddp tag which is used or | |
47 | * is the base for ITT/TTT. | |
48 | */ | |
49 | ||
50 | #define DDP_PGIDX_MAX 4 | |
51 | #define DDP_THRESHOLD 2048 | |
52 | static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4}; | |
53 | static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16}; | |
54 | static unsigned char page_idx = DDP_PGIDX_MAX; | |
55 | ||
c3673464 KX |
56 | /* |
57 | * functions to program the pagepod in h/w | |
58 | */ | |
59 | static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) | |
60 | { | |
61 | struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; | |
62 | ||
63 | req->wr.wr_lo = 0; | |
64 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); | |
65 | req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | | |
66 | V_ULPTX_CMD(ULP_MEM_WRITE)); | |
67 | req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) | | |
68 | V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1)); | |
69 | } | |
70 | ||
71 | static int set_ddp_map(struct cxgb3i_ddp_info *ddp, struct pagepod_hdr *hdr, | |
72 | unsigned int idx, unsigned int npods, | |
73 | struct cxgb3i_gather_list *gl) | |
74 | { | |
75 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; | |
76 | int i; | |
77 | ||
78 | for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { | |
79 | struct sk_buff *skb = ddp->gl_skb[idx]; | |
80 | struct pagepod *ppod; | |
81 | int j, pidx; | |
82 | ||
83 | /* hold on to the skb until we clear the ddp mapping */ | |
84 | skb_get(skb); | |
85 | ||
86 | ulp_mem_io_set_hdr(skb, pm_addr); | |
87 | ppod = (struct pagepod *) | |
88 | (skb->head + sizeof(struct ulp_mem_io)); | |
89 | memcpy(&(ppod->hdr), hdr, sizeof(struct pagepod)); | |
90 | for (pidx = 4 * i, j = 0; j < 5; ++j, ++pidx) | |
91 | ppod->addr[j] = pidx < gl->nelem ? | |
92 | cpu_to_be64(gl->phys_addr[pidx]) : 0UL; | |
93 | ||
94 | skb->priority = CPL_PRIORITY_CONTROL; | |
95 | cxgb3_ofld_send(ddp->tdev, skb); | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
9fa1926a KX |
100 | static void clear_ddp_map(struct cxgb3i_ddp_info *ddp, unsigned int tag, |
101 | unsigned int idx, unsigned int npods) | |
c3673464 KX |
102 | { |
103 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; | |
104 | int i; | |
105 | ||
106 | for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { | |
107 | struct sk_buff *skb = ddp->gl_skb[idx]; | |
108 | ||
9fa1926a KX |
109 | if (!skb) { |
110 | ddp_log_error("ddp tag 0x%x, 0x%x, %d/%u, skb NULL.\n", | |
111 | tag, idx, i, npods); | |
112 | continue; | |
113 | } | |
c3673464 KX |
114 | ddp->gl_skb[idx] = NULL; |
115 | memset((skb->head + sizeof(struct ulp_mem_io)), 0, PPOD_SIZE); | |
116 | ulp_mem_io_set_hdr(skb, pm_addr); | |
117 | skb->priority = CPL_PRIORITY_CONTROL; | |
118 | cxgb3_ofld_send(ddp->tdev, skb); | |
119 | } | |
c3673464 KX |
120 | } |
121 | ||
122 | static inline int ddp_find_unused_entries(struct cxgb3i_ddp_info *ddp, | |
123 | int start, int max, int count, | |
124 | struct cxgb3i_gather_list *gl) | |
125 | { | |
126 | unsigned int i, j; | |
127 | ||
128 | spin_lock(&ddp->map_lock); | |
129 | for (i = start; i <= max;) { | |
130 | for (j = 0; j < count; j++) { | |
131 | if (ddp->gl_map[i + j]) | |
132 | break; | |
133 | } | |
134 | if (j == count) { | |
135 | for (j = 0; j < count; j++) | |
136 | ddp->gl_map[i + j] = gl; | |
137 | spin_unlock(&ddp->map_lock); | |
138 | return i; | |
139 | } | |
140 | i += j + 1; | |
141 | } | |
142 | spin_unlock(&ddp->map_lock); | |
143 | return -EBUSY; | |
144 | } | |
145 | ||
146 | static inline void ddp_unmark_entries(struct cxgb3i_ddp_info *ddp, | |
147 | int start, int count) | |
148 | { | |
149 | spin_lock(&ddp->map_lock); | |
150 | memset(&ddp->gl_map[start], 0, | |
151 | count * sizeof(struct cxgb3i_gather_list *)); | |
152 | spin_unlock(&ddp->map_lock); | |
153 | } | |
154 | ||
155 | static inline void ddp_free_gl_skb(struct cxgb3i_ddp_info *ddp, | |
156 | int idx, int count) | |
157 | { | |
158 | int i; | |
159 | ||
160 | for (i = 0; i < count; i++, idx++) | |
161 | if (ddp->gl_skb[idx]) { | |
162 | kfree_skb(ddp->gl_skb[idx]); | |
163 | ddp->gl_skb[idx] = NULL; | |
164 | } | |
165 | } | |
166 | ||
167 | static inline int ddp_alloc_gl_skb(struct cxgb3i_ddp_info *ddp, int idx, | |
168 | int count, gfp_t gfp) | |
169 | { | |
170 | int i; | |
171 | ||
172 | for (i = 0; i < count; i++) { | |
173 | struct sk_buff *skb = alloc_skb(sizeof(struct ulp_mem_io) + | |
174 | PPOD_SIZE, gfp); | |
175 | if (skb) { | |
176 | ddp->gl_skb[idx + i] = skb; | |
177 | skb_put(skb, sizeof(struct ulp_mem_io) + PPOD_SIZE); | |
178 | } else { | |
179 | ddp_free_gl_skb(ddp, idx, i); | |
180 | return -ENOMEM; | |
181 | } | |
182 | } | |
183 | return 0; | |
184 | } | |
185 | ||
186 | /** | |
154229a3 | 187 | * cxgb3i_ddp_find_page_index - return ddp page index for a given page size |
c3673464 KX |
188 | * @pgsz: page size |
189 | * return the ddp page index, if no match is found return DDP_PGIDX_MAX. | |
190 | */ | |
191 | int cxgb3i_ddp_find_page_index(unsigned long pgsz) | |
192 | { | |
193 | int i; | |
194 | ||
195 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
196 | if (pgsz == (1UL << ddp_page_shift[i])) | |
197 | return i; | |
198 | } | |
199 | ddp_log_debug("ddp page size 0x%lx not supported.\n", pgsz); | |
200 | return DDP_PGIDX_MAX; | |
201 | } | |
c3673464 KX |
202 | |
203 | static inline void ddp_gl_unmap(struct pci_dev *pdev, | |
204 | struct cxgb3i_gather_list *gl) | |
205 | { | |
206 | int i; | |
207 | ||
208 | for (i = 0; i < gl->nelem; i++) | |
209 | pci_unmap_page(pdev, gl->phys_addr[i], PAGE_SIZE, | |
210 | PCI_DMA_FROMDEVICE); | |
211 | } | |
212 | ||
213 | static inline int ddp_gl_map(struct pci_dev *pdev, | |
214 | struct cxgb3i_gather_list *gl) | |
215 | { | |
216 | int i; | |
217 | ||
218 | for (i = 0; i < gl->nelem; i++) { | |
219 | gl->phys_addr[i] = pci_map_page(pdev, gl->pages[i], 0, | |
220 | PAGE_SIZE, | |
221 | PCI_DMA_FROMDEVICE); | |
222 | if (unlikely(pci_dma_mapping_error(pdev, gl->phys_addr[i]))) | |
223 | goto unmap; | |
224 | } | |
225 | ||
226 | return i; | |
227 | ||
228 | unmap: | |
229 | if (i) { | |
230 | unsigned int nelem = gl->nelem; | |
231 | ||
232 | gl->nelem = i; | |
233 | ddp_gl_unmap(pdev, gl); | |
234 | gl->nelem = nelem; | |
235 | } | |
236 | return -ENOMEM; | |
237 | } | |
238 | ||
239 | /** | |
240 | * cxgb3i_ddp_make_gl - build ddp page buffer list | |
241 | * @xferlen: total buffer length | |
242 | * @sgl: page buffer scatter-gather list | |
243 | * @sgcnt: # of page buffers | |
244 | * @pdev: pci_dev, used for pci map | |
245 | * @gfp: allocation mode | |
246 | * | |
247 | * construct a ddp page buffer list from the scsi scattergather list. | |
248 | * coalesce buffers as much as possible, and obtain dma addresses for | |
249 | * each page. | |
250 | * | |
251 | * Return the cxgb3i_gather_list constructed from the page buffers if the | |
252 | * memory can be used for ddp. Return NULL otherwise. | |
253 | */ | |
254 | struct cxgb3i_gather_list *cxgb3i_ddp_make_gl(unsigned int xferlen, | |
255 | struct scatterlist *sgl, | |
256 | unsigned int sgcnt, | |
257 | struct pci_dev *pdev, | |
258 | gfp_t gfp) | |
259 | { | |
260 | struct cxgb3i_gather_list *gl; | |
261 | struct scatterlist *sg = sgl; | |
262 | struct page *sgpage = sg_page(sg); | |
263 | unsigned int sglen = sg->length; | |
264 | unsigned int sgoffset = sg->offset; | |
265 | unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >> | |
266 | PAGE_SHIFT; | |
267 | int i = 1, j = 0; | |
268 | ||
269 | if (xferlen < DDP_THRESHOLD) { | |
270 | ddp_log_debug("xfer %u < threshold %u, no ddp.\n", | |
271 | xferlen, DDP_THRESHOLD); | |
272 | return NULL; | |
273 | } | |
274 | ||
275 | gl = kzalloc(sizeof(struct cxgb3i_gather_list) + | |
276 | npages * (sizeof(dma_addr_t) + sizeof(struct page *)), | |
277 | gfp); | |
278 | if (!gl) | |
279 | return NULL; | |
280 | ||
281 | gl->pages = (struct page **)&gl->phys_addr[npages]; | |
282 | gl->length = xferlen; | |
283 | gl->offset = sgoffset; | |
284 | gl->pages[0] = sgpage; | |
285 | ||
286 | sg = sg_next(sg); | |
287 | while (sg) { | |
288 | struct page *page = sg_page(sg); | |
289 | ||
290 | if (sgpage == page && sg->offset == sgoffset + sglen) | |
291 | sglen += sg->length; | |
292 | else { | |
293 | /* make sure the sgl is fit for ddp: | |
294 | * each has the same page size, and | |
295 | * all of the middle pages are used completely | |
296 | */ | |
297 | if ((j && sgoffset) || | |
298 | ((i != sgcnt - 1) && | |
299 | ((sglen + sgoffset) & ~PAGE_MASK))) | |
300 | goto error_out; | |
301 | ||
302 | j++; | |
303 | if (j == gl->nelem || sg->offset) | |
304 | goto error_out; | |
305 | gl->pages[j] = page; | |
306 | sglen = sg->length; | |
307 | sgoffset = sg->offset; | |
308 | sgpage = page; | |
309 | } | |
310 | i++; | |
311 | sg = sg_next(sg); | |
312 | } | |
313 | gl->nelem = ++j; | |
314 | ||
315 | if (ddp_gl_map(pdev, gl) < 0) | |
316 | goto error_out; | |
317 | ||
318 | return gl; | |
319 | ||
320 | error_out: | |
321 | kfree(gl); | |
322 | return NULL; | |
323 | } | |
c3673464 KX |
324 | |
325 | /** | |
326 | * cxgb3i_ddp_release_gl - release a page buffer list | |
327 | * @gl: a ddp page buffer list | |
328 | * @pdev: pci_dev used for pci_unmap | |
329 | * free a ddp page buffer list resulted from cxgb3i_ddp_make_gl(). | |
330 | */ | |
331 | void cxgb3i_ddp_release_gl(struct cxgb3i_gather_list *gl, | |
332 | struct pci_dev *pdev) | |
333 | { | |
334 | ddp_gl_unmap(pdev, gl); | |
335 | kfree(gl); | |
336 | } | |
c3673464 KX |
337 | |
338 | /** | |
339 | * cxgb3i_ddp_tag_reserve - set up ddp for a data transfer | |
340 | * @tdev: t3cdev adapter | |
341 | * @tid: connection id | |
342 | * @tformat: tag format | |
154229a3 | 343 | * @tagp: contains s/w tag initially, will be updated with ddp/hw tag |
c3673464 KX |
344 | * @gl: the page momory list |
345 | * @gfp: allocation mode | |
346 | * | |
347 | * ddp setup for a given page buffer list and construct the ddp tag. | |
348 | * return 0 if success, < 0 otherwise. | |
349 | */ | |
350 | int cxgb3i_ddp_tag_reserve(struct t3cdev *tdev, unsigned int tid, | |
351 | struct cxgb3i_tag_format *tformat, u32 *tagp, | |
352 | struct cxgb3i_gather_list *gl, gfp_t gfp) | |
353 | { | |
354 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; | |
355 | struct pagepod_hdr hdr; | |
356 | unsigned int npods; | |
357 | int idx = -1, idx_max; | |
358 | int err = -ENOMEM; | |
359 | u32 sw_tag = *tagp; | |
360 | u32 tag; | |
361 | ||
362 | if (page_idx >= DDP_PGIDX_MAX || !ddp || !gl || !gl->nelem || | |
363 | gl->length < DDP_THRESHOLD) { | |
364 | ddp_log_debug("pgidx %u, xfer %u/%u, NO ddp.\n", | |
365 | page_idx, gl->length, DDP_THRESHOLD); | |
366 | return -EINVAL; | |
367 | } | |
368 | ||
369 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
370 | idx_max = ddp->nppods - npods + 1; | |
371 | ||
372 | if (ddp->idx_last == ddp->nppods) | |
373 | idx = ddp_find_unused_entries(ddp, 0, idx_max, npods, gl); | |
374 | else { | |
375 | idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1, | |
376 | idx_max, npods, gl); | |
377 | if (idx < 0 && ddp->idx_last >= npods) | |
378 | idx = ddp_find_unused_entries(ddp, 0, | |
379 | ddp->idx_last - npods + 1, | |
380 | npods, gl); | |
381 | } | |
382 | if (idx < 0) { | |
383 | ddp_log_debug("xferlen %u, gl %u, npods %u NO DDP.\n", | |
384 | gl->length, gl->nelem, npods); | |
385 | return idx; | |
386 | } | |
387 | ||
388 | err = ddp_alloc_gl_skb(ddp, idx, npods, gfp); | |
389 | if (err < 0) | |
390 | goto unmark_entries; | |
391 | ||
392 | tag = cxgb3i_ddp_tag_base(tformat, sw_tag); | |
393 | tag |= idx << PPOD_IDX_SHIFT; | |
394 | ||
395 | hdr.rsvd = 0; | |
396 | hdr.vld_tid = htonl(F_PPOD_VALID | V_PPOD_TID(tid)); | |
397 | hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask); | |
398 | hdr.maxoffset = htonl(gl->length); | |
399 | hdr.pgoffset = htonl(gl->offset); | |
400 | ||
401 | err = set_ddp_map(ddp, &hdr, idx, npods, gl); | |
402 | if (err < 0) | |
403 | goto free_gl_skb; | |
404 | ||
405 | ddp->idx_last = idx; | |
406 | ddp_log_debug("xfer %u, gl %u,%u, tid 0x%x, 0x%x -> 0x%x(%u,%u).\n", | |
407 | gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, | |
408 | idx, npods); | |
409 | *tagp = tag; | |
410 | return 0; | |
411 | ||
412 | free_gl_skb: | |
413 | ddp_free_gl_skb(ddp, idx, npods); | |
414 | unmark_entries: | |
415 | ddp_unmark_entries(ddp, idx, npods); | |
416 | return err; | |
417 | } | |
c3673464 KX |
418 | |
419 | /** | |
420 | * cxgb3i_ddp_tag_release - release a ddp tag | |
421 | * @tdev: t3cdev adapter | |
422 | * @tag: ddp tag | |
423 | * ddp cleanup for a given ddp tag and release all the resources held | |
424 | */ | |
425 | void cxgb3i_ddp_tag_release(struct t3cdev *tdev, u32 tag) | |
426 | { | |
427 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; | |
428 | u32 idx; | |
429 | ||
430 | if (!ddp) { | |
431 | ddp_log_error("release ddp tag 0x%x, ddp NULL.\n", tag); | |
432 | return; | |
433 | } | |
434 | ||
435 | idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask; | |
436 | if (idx < ddp->nppods) { | |
437 | struct cxgb3i_gather_list *gl = ddp->gl_map[idx]; | |
438 | unsigned int npods; | |
439 | ||
9fa1926a KX |
440 | if (!gl || !gl->nelem) { |
441 | ddp_log_error("release 0x%x, idx 0x%x, gl 0x%p, %u.\n", | |
442 | tag, idx, gl, gl ? gl->nelem : 0); | |
c3673464 KX |
443 | return; |
444 | } | |
445 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
446 | ddp_log_debug("ddp tag 0x%x, release idx 0x%x, npods %u.\n", | |
447 | tag, idx, npods); | |
9fa1926a | 448 | clear_ddp_map(ddp, tag, idx, npods); |
c3673464 KX |
449 | ddp_unmark_entries(ddp, idx, npods); |
450 | cxgb3i_ddp_release_gl(gl, ddp->pdev); | |
451 | } else | |
452 | ddp_log_error("ddp tag 0x%x, idx 0x%x > max 0x%x.\n", | |
453 | tag, idx, ddp->nppods); | |
454 | } | |
c3673464 KX |
455 | |
456 | static int setup_conn_pgidx(struct t3cdev *tdev, unsigned int tid, int pg_idx, | |
457 | int reply) | |
458 | { | |
459 | struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), | |
460 | GFP_KERNEL); | |
461 | struct cpl_set_tcb_field *req; | |
462 | u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; | |
463 | ||
464 | if (!skb) | |
465 | return -ENOMEM; | |
466 | ||
467 | /* set up ulp submode and page size */ | |
468 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
469 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
470 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
471 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
472 | req->cpu_idx = 0; | |
473 | req->word = htons(31); | |
474 | req->mask = cpu_to_be64(0xF0000000); | |
475 | req->val = cpu_to_be64(val << 28); | |
476 | skb->priority = CPL_PRIORITY_CONTROL; | |
477 | ||
478 | cxgb3_ofld_send(tdev, skb); | |
479 | return 0; | |
480 | } | |
481 | ||
482 | /** | |
483 | * cxgb3i_setup_conn_host_pagesize - setup the conn.'s ddp page size | |
484 | * @tdev: t3cdev adapter | |
485 | * @tid: connection id | |
486 | * @reply: request reply from h/w | |
487 | * set up the ddp page size based on the host PAGE_SIZE for a connection | |
488 | * identified by tid | |
489 | */ | |
490 | int cxgb3i_setup_conn_host_pagesize(struct t3cdev *tdev, unsigned int tid, | |
491 | int reply) | |
492 | { | |
493 | return setup_conn_pgidx(tdev, tid, page_idx, reply); | |
494 | } | |
c3673464 KX |
495 | |
496 | /** | |
497 | * cxgb3i_setup_conn_pagesize - setup the conn.'s ddp page size | |
498 | * @tdev: t3cdev adapter | |
499 | * @tid: connection id | |
500 | * @reply: request reply from h/w | |
501 | * @pgsz: ddp page size | |
502 | * set up the ddp page size for a connection identified by tid | |
503 | */ | |
504 | int cxgb3i_setup_conn_pagesize(struct t3cdev *tdev, unsigned int tid, | |
505 | int reply, unsigned long pgsz) | |
506 | { | |
507 | int pgidx = cxgb3i_ddp_find_page_index(pgsz); | |
508 | ||
509 | return setup_conn_pgidx(tdev, tid, pgidx, reply); | |
510 | } | |
c3673464 KX |
511 | |
512 | /** | |
513 | * cxgb3i_setup_conn_digest - setup conn. digest setting | |
514 | * @tdev: t3cdev adapter | |
515 | * @tid: connection id | |
516 | * @hcrc: header digest enabled | |
517 | * @dcrc: data digest enabled | |
518 | * @reply: request reply from h/w | |
519 | * set up the iscsi digest settings for a connection identified by tid | |
520 | */ | |
521 | int cxgb3i_setup_conn_digest(struct t3cdev *tdev, unsigned int tid, | |
522 | int hcrc, int dcrc, int reply) | |
523 | { | |
524 | struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), | |
525 | GFP_KERNEL); | |
526 | struct cpl_set_tcb_field *req; | |
527 | u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); | |
528 | ||
529 | if (!skb) | |
530 | return -ENOMEM; | |
531 | ||
532 | /* set up ulp submode and page size */ | |
533 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
534 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
535 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
536 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
537 | req->cpu_idx = 0; | |
538 | req->word = htons(31); | |
539 | req->mask = cpu_to_be64(0x0F000000); | |
540 | req->val = cpu_to_be64(val << 24); | |
541 | skb->priority = CPL_PRIORITY_CONTROL; | |
542 | ||
543 | cxgb3_ofld_send(tdev, skb); | |
544 | return 0; | |
545 | } | |
c3673464 | 546 | |
9fa1926a KX |
547 | |
548 | /** | |
549 | * cxgb3i_adapter_ddp_info - read the adapter's ddp information | |
550 | * @tdev: t3cdev adapter | |
551 | * @tformat: tag format | |
552 | * @txsz: max tx pdu payload size, filled in by this func. | |
553 | * @rxsz: max rx pdu payload size, filled in by this func. | |
554 | * setup the tag format for a given iscsi entity | |
555 | */ | |
556 | int cxgb3i_adapter_ddp_info(struct t3cdev *tdev, | |
557 | struct cxgb3i_tag_format *tformat, | |
558 | unsigned int *txsz, unsigned int *rxsz) | |
559 | { | |
560 | struct cxgb3i_ddp_info *ddp; | |
561 | unsigned char idx_bits; | |
562 | ||
563 | if (!tformat) | |
564 | return -EINVAL; | |
565 | ||
566 | if (!tdev->ulp_iscsi) | |
567 | return -EINVAL; | |
568 | ||
569 | ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; | |
570 | ||
571 | idx_bits = 32 - tformat->sw_bits; | |
572 | tformat->rsvd_bits = ddp->idx_bits; | |
573 | tformat->rsvd_shift = PPOD_IDX_SHIFT; | |
574 | tformat->rsvd_mask = (1 << tformat->rsvd_bits) - 1; | |
575 | ||
576 | ddp_log_info("tag format: sw %u, rsvd %u,%u, mask 0x%x.\n", | |
577 | tformat->sw_bits, tformat->rsvd_bits, | |
578 | tformat->rsvd_shift, tformat->rsvd_mask); | |
579 | ||
580 | *txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
581 | ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
582 | *rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
583 | ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
584 | ddp_log_info("max payload size: %u/%u, %u/%u.\n", | |
585 | *txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz); | |
586 | return 0; | |
587 | } | |
9fa1926a KX |
588 | |
589 | /** | |
590 | * ddp_release - release the cxgb3 adapter's ddp resource | |
591 | * @tdev: t3cdev adapter | |
592 | * release all the resource held by the ddp pagepod manager for a given | |
593 | * adapter if needed | |
594 | */ | |
595 | static void ddp_release(struct t3cdev *tdev) | |
596 | { | |
597 | int i = 0; | |
598 | struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; | |
599 | ||
600 | ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp); | |
601 | ||
602 | if (ddp) { | |
603 | tdev->ulp_iscsi = NULL; | |
604 | while (i < ddp->nppods) { | |
605 | struct cxgb3i_gather_list *gl = ddp->gl_map[i]; | |
606 | if (gl) { | |
607 | int npods = (gl->nelem + PPOD_PAGES_MAX - 1) | |
608 | >> PPOD_PAGES_SHIFT; | |
609 | ddp_log_info("t3dev 0x%p, ddp %d + %d.\n", | |
610 | tdev, i, npods); | |
611 | kfree(gl); | |
612 | ddp_free_gl_skb(ddp, i, npods); | |
613 | i += npods; | |
614 | } else | |
615 | i++; | |
616 | } | |
617 | cxgb3i_free_big_mem(ddp); | |
618 | } | |
619 | } | |
620 | ||
621 | /** | |
622 | * ddp_init - initialize the cxgb3 adapter's ddp resource | |
623 | * @tdev: t3cdev adapter | |
624 | * initialize the ddp pagepod manager for a given adapter | |
625 | */ | |
626 | static void ddp_init(struct t3cdev *tdev) | |
c3673464 KX |
627 | { |
628 | struct cxgb3i_ddp_info *ddp; | |
629 | struct ulp_iscsi_info uinfo; | |
630 | unsigned int ppmax, bits; | |
631 | int i, err; | |
c3673464 | 632 | |
9fa1926a KX |
633 | if (tdev->ulp_iscsi) { |
634 | ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n", | |
635 | tdev, tdev->ulp_iscsi); | |
636 | return; | |
637 | } | |
638 | ||
c3673464 KX |
639 | err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); |
640 | if (err < 0) { | |
641 | ddp_log_error("%s, failed to get iscsi param err=%d.\n", | |
642 | tdev->name, err); | |
9fa1926a | 643 | return; |
c3673464 KX |
644 | } |
645 | ||
646 | ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT; | |
647 | bits = __ilog2_u32(ppmax) + 1; | |
648 | if (bits > PPOD_IDX_MAX_SIZE) | |
649 | bits = PPOD_IDX_MAX_SIZE; | |
650 | ppmax = (1 << (bits - 1)) - 1; | |
651 | ||
652 | ddp = cxgb3i_alloc_big_mem(sizeof(struct cxgb3i_ddp_info) + | |
653 | ppmax * | |
654 | (sizeof(struct cxgb3i_gather_list *) + | |
655 | sizeof(struct sk_buff *)), | |
656 | GFP_KERNEL); | |
657 | if (!ddp) { | |
658 | ddp_log_warn("%s unable to alloc ddp 0x%d, ddp disabled.\n", | |
659 | tdev->name, ppmax); | |
9fa1926a | 660 | return; |
c3673464 KX |
661 | } |
662 | ddp->gl_map = (struct cxgb3i_gather_list **)(ddp + 1); | |
663 | ddp->gl_skb = (struct sk_buff **)(((char *)ddp->gl_map) + | |
664 | ppmax * | |
665 | sizeof(struct cxgb3i_gather_list *)); | |
666 | spin_lock_init(&ddp->map_lock); | |
667 | ||
668 | ddp->tdev = tdev; | |
669 | ddp->pdev = uinfo.pdev; | |
670 | ddp->max_txsz = min_t(unsigned int, uinfo.max_txsz, ULP2_MAX_PKT_SIZE); | |
671 | ddp->max_rxsz = min_t(unsigned int, uinfo.max_rxsz, ULP2_MAX_PKT_SIZE); | |
672 | ddp->llimit = uinfo.llimit; | |
673 | ddp->ulimit = uinfo.ulimit; | |
674 | ddp->nppods = ppmax; | |
675 | ddp->idx_last = ppmax; | |
676 | ddp->idx_bits = bits; | |
677 | ddp->idx_mask = (1 << bits) - 1; | |
678 | ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1; | |
679 | ||
680 | uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; | |
681 | for (i = 0; i < DDP_PGIDX_MAX; i++) | |
682 | uinfo.pgsz_factor[i] = ddp_page_order[i]; | |
683 | uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT); | |
684 | ||
685 | err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); | |
686 | if (err < 0) { | |
687 | ddp_log_warn("%s unable to set iscsi param err=%d, " | |
688 | "ddp disabled.\n", tdev->name, err); | |
689 | goto free_ddp_map; | |
690 | } | |
691 | ||
692 | tdev->ulp_iscsi = ddp; | |
693 | ||
9fa1926a KX |
694 | ddp_log_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u," |
695 | " %u/%u.\n", | |
696 | tdev, ppmax, ddp->idx_bits, ddp->idx_mask, | |
697 | ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, | |
f62d0896 | 698 | ddp->max_rxsz, uinfo.max_rxsz); |
9fa1926a | 699 | return; |
c3673464 KX |
700 | |
701 | free_ddp_map: | |
702 | cxgb3i_free_big_mem(ddp); | |
c3673464 KX |
703 | } |
704 | ||
c3673464 | 705 | /** |
0d0c27f2 | 706 | * cxgb3i_ddp_init - initialize ddp functions |
c3673464 | 707 | */ |
0d0c27f2 | 708 | void cxgb3i_ddp_init(struct t3cdev *tdev) |
c3673464 | 709 | { |
0d0c27f2 KX |
710 | if (page_idx == DDP_PGIDX_MAX) { |
711 | page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE); | |
712 | ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n", | |
713 | PAGE_SIZE, page_idx); | |
714 | } | |
715 | ddp_init(tdev); | |
c3673464 KX |
716 | } |
717 | ||
718 | /** | |
0d0c27f2 | 719 | * cxgb3i_ddp_cleaup - clean up ddp function |
c3673464 | 720 | */ |
0d0c27f2 | 721 | void cxgb3i_ddp_cleanup(struct t3cdev *tdev) |
c3673464 | 722 | { |
0d0c27f2 | 723 | ddp_release(tdev); |
c3673464 | 724 | } |