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, | |
a53922dd | 123 | unsigned int start, unsigned int max, |
124 | unsigned int count, | |
c3673464 KX |
125 | struct cxgb3i_gather_list *gl) |
126 | { | |
a53922dd | 127 | unsigned int i, j, k; |
c3673464 | 128 | |
a53922dd | 129 | /* not enough entries */ |
130 | if ((max - start) < count) | |
131 | return -EBUSY; | |
132 | ||
133 | max -= count; | |
c3673464 | 134 | spin_lock(&ddp->map_lock); |
a53922dd | 135 | for (i = start; i < max;) { |
136 | for (j = 0, k = i; j < count; j++, k++) { | |
137 | if (ddp->gl_map[k]) | |
c3673464 KX |
138 | break; |
139 | } | |
140 | if (j == count) { | |
a53922dd | 141 | for (j = 0, k = i; j < count; j++, k++) |
142 | ddp->gl_map[k] = gl; | |
c3673464 KX |
143 | spin_unlock(&ddp->map_lock); |
144 | return i; | |
145 | } | |
146 | i += j + 1; | |
147 | } | |
148 | spin_unlock(&ddp->map_lock); | |
149 | return -EBUSY; | |
150 | } | |
151 | ||
152 | static inline void ddp_unmark_entries(struct cxgb3i_ddp_info *ddp, | |
153 | int start, int count) | |
154 | { | |
155 | spin_lock(&ddp->map_lock); | |
156 | memset(&ddp->gl_map[start], 0, | |
157 | count * sizeof(struct cxgb3i_gather_list *)); | |
158 | spin_unlock(&ddp->map_lock); | |
159 | } | |
160 | ||
161 | static inline void ddp_free_gl_skb(struct cxgb3i_ddp_info *ddp, | |
162 | int idx, int count) | |
163 | { | |
164 | int i; | |
165 | ||
166 | for (i = 0; i < count; i++, idx++) | |
167 | if (ddp->gl_skb[idx]) { | |
168 | kfree_skb(ddp->gl_skb[idx]); | |
169 | ddp->gl_skb[idx] = NULL; | |
170 | } | |
171 | } | |
172 | ||
173 | static inline int ddp_alloc_gl_skb(struct cxgb3i_ddp_info *ddp, int idx, | |
174 | int count, gfp_t gfp) | |
175 | { | |
176 | int i; | |
177 | ||
178 | for (i = 0; i < count; i++) { | |
179 | struct sk_buff *skb = alloc_skb(sizeof(struct ulp_mem_io) + | |
180 | PPOD_SIZE, gfp); | |
181 | if (skb) { | |
182 | ddp->gl_skb[idx + i] = skb; | |
183 | skb_put(skb, sizeof(struct ulp_mem_io) + PPOD_SIZE); | |
184 | } else { | |
185 | ddp_free_gl_skb(ddp, idx, i); | |
186 | return -ENOMEM; | |
187 | } | |
188 | } | |
189 | return 0; | |
190 | } | |
191 | ||
192 | /** | |
154229a3 | 193 | * cxgb3i_ddp_find_page_index - return ddp page index for a given page size |
c3673464 KX |
194 | * @pgsz: page size |
195 | * return the ddp page index, if no match is found return DDP_PGIDX_MAX. | |
196 | */ | |
197 | int cxgb3i_ddp_find_page_index(unsigned long pgsz) | |
198 | { | |
199 | int i; | |
200 | ||
201 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
202 | if (pgsz == (1UL << ddp_page_shift[i])) | |
203 | return i; | |
204 | } | |
205 | ddp_log_debug("ddp page size 0x%lx not supported.\n", pgsz); | |
206 | return DDP_PGIDX_MAX; | |
207 | } | |
c3673464 KX |
208 | |
209 | static inline void ddp_gl_unmap(struct pci_dev *pdev, | |
210 | struct cxgb3i_gather_list *gl) | |
211 | { | |
212 | int i; | |
213 | ||
214 | for (i = 0; i < gl->nelem; i++) | |
215 | pci_unmap_page(pdev, gl->phys_addr[i], PAGE_SIZE, | |
216 | PCI_DMA_FROMDEVICE); | |
217 | } | |
218 | ||
219 | static inline int ddp_gl_map(struct pci_dev *pdev, | |
220 | struct cxgb3i_gather_list *gl) | |
221 | { | |
222 | int i; | |
223 | ||
224 | for (i = 0; i < gl->nelem; i++) { | |
225 | gl->phys_addr[i] = pci_map_page(pdev, gl->pages[i], 0, | |
226 | PAGE_SIZE, | |
227 | PCI_DMA_FROMDEVICE); | |
228 | if (unlikely(pci_dma_mapping_error(pdev, gl->phys_addr[i]))) | |
229 | goto unmap; | |
230 | } | |
231 | ||
232 | return i; | |
233 | ||
234 | unmap: | |
235 | if (i) { | |
236 | unsigned int nelem = gl->nelem; | |
237 | ||
238 | gl->nelem = i; | |
239 | ddp_gl_unmap(pdev, gl); | |
240 | gl->nelem = nelem; | |
241 | } | |
242 | return -ENOMEM; | |
243 | } | |
244 | ||
245 | /** | |
246 | * cxgb3i_ddp_make_gl - build ddp page buffer list | |
247 | * @xferlen: total buffer length | |
248 | * @sgl: page buffer scatter-gather list | |
249 | * @sgcnt: # of page buffers | |
250 | * @pdev: pci_dev, used for pci map | |
251 | * @gfp: allocation mode | |
252 | * | |
253 | * construct a ddp page buffer list from the scsi scattergather list. | |
254 | * coalesce buffers as much as possible, and obtain dma addresses for | |
255 | * each page. | |
256 | * | |
257 | * Return the cxgb3i_gather_list constructed from the page buffers if the | |
258 | * memory can be used for ddp. Return NULL otherwise. | |
259 | */ | |
260 | struct cxgb3i_gather_list *cxgb3i_ddp_make_gl(unsigned int xferlen, | |
261 | struct scatterlist *sgl, | |
262 | unsigned int sgcnt, | |
263 | struct pci_dev *pdev, | |
264 | gfp_t gfp) | |
265 | { | |
266 | struct cxgb3i_gather_list *gl; | |
267 | struct scatterlist *sg = sgl; | |
268 | struct page *sgpage = sg_page(sg); | |
269 | unsigned int sglen = sg->length; | |
270 | unsigned int sgoffset = sg->offset; | |
271 | unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >> | |
272 | PAGE_SHIFT; | |
273 | int i = 1, j = 0; | |
274 | ||
275 | if (xferlen < DDP_THRESHOLD) { | |
276 | ddp_log_debug("xfer %u < threshold %u, no ddp.\n", | |
277 | xferlen, DDP_THRESHOLD); | |
278 | return NULL; | |
279 | } | |
280 | ||
281 | gl = kzalloc(sizeof(struct cxgb3i_gather_list) + | |
282 | npages * (sizeof(dma_addr_t) + sizeof(struct page *)), | |
283 | gfp); | |
284 | if (!gl) | |
285 | return NULL; | |
286 | ||
287 | gl->pages = (struct page **)&gl->phys_addr[npages]; | |
288 | gl->length = xferlen; | |
289 | gl->offset = sgoffset; | |
290 | gl->pages[0] = sgpage; | |
291 | ||
292 | sg = sg_next(sg); | |
293 | while (sg) { | |
294 | struct page *page = sg_page(sg); | |
295 | ||
296 | if (sgpage == page && sg->offset == sgoffset + sglen) | |
297 | sglen += sg->length; | |
298 | else { | |
299 | /* make sure the sgl is fit for ddp: | |
300 | * each has the same page size, and | |
301 | * all of the middle pages are used completely | |
302 | */ | |
303 | if ((j && sgoffset) || | |
304 | ((i != sgcnt - 1) && | |
305 | ((sglen + sgoffset) & ~PAGE_MASK))) | |
306 | goto error_out; | |
307 | ||
308 | j++; | |
309 | if (j == gl->nelem || sg->offset) | |
310 | goto error_out; | |
311 | gl->pages[j] = page; | |
312 | sglen = sg->length; | |
313 | sgoffset = sg->offset; | |
314 | sgpage = page; | |
315 | } | |
316 | i++; | |
317 | sg = sg_next(sg); | |
318 | } | |
319 | gl->nelem = ++j; | |
320 | ||
321 | if (ddp_gl_map(pdev, gl) < 0) | |
322 | goto error_out; | |
323 | ||
324 | return gl; | |
325 | ||
326 | error_out: | |
327 | kfree(gl); | |
328 | return NULL; | |
329 | } | |
c3673464 KX |
330 | |
331 | /** | |
332 | * cxgb3i_ddp_release_gl - release a page buffer list | |
333 | * @gl: a ddp page buffer list | |
334 | * @pdev: pci_dev used for pci_unmap | |
335 | * free a ddp page buffer list resulted from cxgb3i_ddp_make_gl(). | |
336 | */ | |
337 | void cxgb3i_ddp_release_gl(struct cxgb3i_gather_list *gl, | |
338 | struct pci_dev *pdev) | |
339 | { | |
340 | ddp_gl_unmap(pdev, gl); | |
341 | kfree(gl); | |
342 | } | |
c3673464 KX |
343 | |
344 | /** | |
345 | * cxgb3i_ddp_tag_reserve - set up ddp for a data transfer | |
346 | * @tdev: t3cdev adapter | |
347 | * @tid: connection id | |
348 | * @tformat: tag format | |
154229a3 | 349 | * @tagp: contains s/w tag initially, will be updated with ddp/hw tag |
c3673464 KX |
350 | * @gl: the page momory list |
351 | * @gfp: allocation mode | |
352 | * | |
353 | * ddp setup for a given page buffer list and construct the ddp tag. | |
354 | * return 0 if success, < 0 otherwise. | |
355 | */ | |
356 | int cxgb3i_ddp_tag_reserve(struct t3cdev *tdev, unsigned int tid, | |
357 | struct cxgb3i_tag_format *tformat, u32 *tagp, | |
358 | struct cxgb3i_gather_list *gl, gfp_t gfp) | |
359 | { | |
360 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; | |
361 | struct pagepod_hdr hdr; | |
362 | unsigned int npods; | |
a53922dd | 363 | int idx = -1; |
c3673464 KX |
364 | int err = -ENOMEM; |
365 | u32 sw_tag = *tagp; | |
366 | u32 tag; | |
367 | ||
368 | if (page_idx >= DDP_PGIDX_MAX || !ddp || !gl || !gl->nelem || | |
369 | gl->length < DDP_THRESHOLD) { | |
370 | ddp_log_debug("pgidx %u, xfer %u/%u, NO ddp.\n", | |
371 | page_idx, gl->length, DDP_THRESHOLD); | |
372 | return -EINVAL; | |
373 | } | |
374 | ||
375 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
c3673464 KX |
376 | |
377 | if (ddp->idx_last == ddp->nppods) | |
a53922dd | 378 | idx = ddp_find_unused_entries(ddp, 0, ddp->nppods, npods, gl); |
c3673464 KX |
379 | else { |
380 | idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1, | |
a53922dd | 381 | ddp->nppods, npods, gl); |
382 | if (idx < 0 && ddp->idx_last >= npods) { | |
c3673464 | 383 | idx = ddp_find_unused_entries(ddp, 0, |
a53922dd | 384 | min(ddp->idx_last + npods, ddp->nppods), |
c3673464 | 385 | npods, gl); |
a53922dd | 386 | } |
c3673464 KX |
387 | } |
388 | if (idx < 0) { | |
389 | ddp_log_debug("xferlen %u, gl %u, npods %u NO DDP.\n", | |
390 | gl->length, gl->nelem, npods); | |
391 | return idx; | |
392 | } | |
393 | ||
394 | err = ddp_alloc_gl_skb(ddp, idx, npods, gfp); | |
395 | if (err < 0) | |
396 | goto unmark_entries; | |
397 | ||
398 | tag = cxgb3i_ddp_tag_base(tformat, sw_tag); | |
399 | tag |= idx << PPOD_IDX_SHIFT; | |
400 | ||
401 | hdr.rsvd = 0; | |
402 | hdr.vld_tid = htonl(F_PPOD_VALID | V_PPOD_TID(tid)); | |
403 | hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask); | |
404 | hdr.maxoffset = htonl(gl->length); | |
405 | hdr.pgoffset = htonl(gl->offset); | |
406 | ||
407 | err = set_ddp_map(ddp, &hdr, idx, npods, gl); | |
408 | if (err < 0) | |
409 | goto free_gl_skb; | |
410 | ||
411 | ddp->idx_last = idx; | |
412 | ddp_log_debug("xfer %u, gl %u,%u, tid 0x%x, 0x%x -> 0x%x(%u,%u).\n", | |
413 | gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, | |
414 | idx, npods); | |
415 | *tagp = tag; | |
416 | return 0; | |
417 | ||
418 | free_gl_skb: | |
419 | ddp_free_gl_skb(ddp, idx, npods); | |
420 | unmark_entries: | |
421 | ddp_unmark_entries(ddp, idx, npods); | |
422 | return err; | |
423 | } | |
c3673464 KX |
424 | |
425 | /** | |
426 | * cxgb3i_ddp_tag_release - release a ddp tag | |
427 | * @tdev: t3cdev adapter | |
428 | * @tag: ddp tag | |
429 | * ddp cleanup for a given ddp tag and release all the resources held | |
430 | */ | |
431 | void cxgb3i_ddp_tag_release(struct t3cdev *tdev, u32 tag) | |
432 | { | |
433 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; | |
434 | u32 idx; | |
435 | ||
436 | if (!ddp) { | |
437 | ddp_log_error("release ddp tag 0x%x, ddp NULL.\n", tag); | |
438 | return; | |
439 | } | |
440 | ||
441 | idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask; | |
442 | if (idx < ddp->nppods) { | |
443 | struct cxgb3i_gather_list *gl = ddp->gl_map[idx]; | |
444 | unsigned int npods; | |
445 | ||
9fa1926a KX |
446 | if (!gl || !gl->nelem) { |
447 | ddp_log_error("release 0x%x, idx 0x%x, gl 0x%p, %u.\n", | |
448 | tag, idx, gl, gl ? gl->nelem : 0); | |
c3673464 KX |
449 | return; |
450 | } | |
451 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
452 | ddp_log_debug("ddp tag 0x%x, release idx 0x%x, npods %u.\n", | |
453 | tag, idx, npods); | |
9fa1926a | 454 | clear_ddp_map(ddp, tag, idx, npods); |
c3673464 KX |
455 | ddp_unmark_entries(ddp, idx, npods); |
456 | cxgb3i_ddp_release_gl(gl, ddp->pdev); | |
457 | } else | |
458 | ddp_log_error("ddp tag 0x%x, idx 0x%x > max 0x%x.\n", | |
459 | tag, idx, ddp->nppods); | |
460 | } | |
c3673464 KX |
461 | |
462 | static int setup_conn_pgidx(struct t3cdev *tdev, unsigned int tid, int pg_idx, | |
463 | int reply) | |
464 | { | |
465 | struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), | |
466 | GFP_KERNEL); | |
467 | struct cpl_set_tcb_field *req; | |
468 | u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; | |
469 | ||
470 | if (!skb) | |
471 | return -ENOMEM; | |
472 | ||
473 | /* set up ulp submode and page size */ | |
474 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
475 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
476 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
477 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
478 | req->cpu_idx = 0; | |
479 | req->word = htons(31); | |
480 | req->mask = cpu_to_be64(0xF0000000); | |
481 | req->val = cpu_to_be64(val << 28); | |
482 | skb->priority = CPL_PRIORITY_CONTROL; | |
483 | ||
484 | cxgb3_ofld_send(tdev, skb); | |
485 | return 0; | |
486 | } | |
487 | ||
488 | /** | |
489 | * cxgb3i_setup_conn_host_pagesize - setup the conn.'s ddp page size | |
490 | * @tdev: t3cdev adapter | |
491 | * @tid: connection id | |
492 | * @reply: request reply from h/w | |
493 | * set up the ddp page size based on the host PAGE_SIZE for a connection | |
494 | * identified by tid | |
495 | */ | |
496 | int cxgb3i_setup_conn_host_pagesize(struct t3cdev *tdev, unsigned int tid, | |
497 | int reply) | |
498 | { | |
499 | return setup_conn_pgidx(tdev, tid, page_idx, reply); | |
500 | } | |
c3673464 KX |
501 | |
502 | /** | |
503 | * cxgb3i_setup_conn_pagesize - setup the conn.'s ddp page size | |
504 | * @tdev: t3cdev adapter | |
505 | * @tid: connection id | |
506 | * @reply: request reply from h/w | |
507 | * @pgsz: ddp page size | |
508 | * set up the ddp page size for a connection identified by tid | |
509 | */ | |
510 | int cxgb3i_setup_conn_pagesize(struct t3cdev *tdev, unsigned int tid, | |
511 | int reply, unsigned long pgsz) | |
512 | { | |
513 | int pgidx = cxgb3i_ddp_find_page_index(pgsz); | |
514 | ||
515 | return setup_conn_pgidx(tdev, tid, pgidx, reply); | |
516 | } | |
c3673464 KX |
517 | |
518 | /** | |
519 | * cxgb3i_setup_conn_digest - setup conn. digest setting | |
520 | * @tdev: t3cdev adapter | |
521 | * @tid: connection id | |
522 | * @hcrc: header digest enabled | |
523 | * @dcrc: data digest enabled | |
524 | * @reply: request reply from h/w | |
525 | * set up the iscsi digest settings for a connection identified by tid | |
526 | */ | |
527 | int cxgb3i_setup_conn_digest(struct t3cdev *tdev, unsigned int tid, | |
528 | int hcrc, int dcrc, int reply) | |
529 | { | |
530 | struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), | |
531 | GFP_KERNEL); | |
532 | struct cpl_set_tcb_field *req; | |
533 | u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); | |
534 | ||
535 | if (!skb) | |
536 | return -ENOMEM; | |
537 | ||
538 | /* set up ulp submode and page size */ | |
539 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
540 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
541 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
542 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
543 | req->cpu_idx = 0; | |
544 | req->word = htons(31); | |
545 | req->mask = cpu_to_be64(0x0F000000); | |
546 | req->val = cpu_to_be64(val << 24); | |
547 | skb->priority = CPL_PRIORITY_CONTROL; | |
548 | ||
549 | cxgb3_ofld_send(tdev, skb); | |
550 | return 0; | |
551 | } | |
c3673464 | 552 | |
9fa1926a KX |
553 | |
554 | /** | |
555 | * cxgb3i_adapter_ddp_info - read the adapter's ddp information | |
556 | * @tdev: t3cdev adapter | |
557 | * @tformat: tag format | |
558 | * @txsz: max tx pdu payload size, filled in by this func. | |
559 | * @rxsz: max rx pdu payload size, filled in by this func. | |
560 | * setup the tag format for a given iscsi entity | |
561 | */ | |
562 | int cxgb3i_adapter_ddp_info(struct t3cdev *tdev, | |
563 | struct cxgb3i_tag_format *tformat, | |
564 | unsigned int *txsz, unsigned int *rxsz) | |
565 | { | |
566 | struct cxgb3i_ddp_info *ddp; | |
567 | unsigned char idx_bits; | |
568 | ||
569 | if (!tformat) | |
570 | return -EINVAL; | |
571 | ||
572 | if (!tdev->ulp_iscsi) | |
573 | return -EINVAL; | |
574 | ||
575 | ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; | |
576 | ||
577 | idx_bits = 32 - tformat->sw_bits; | |
578 | tformat->rsvd_bits = ddp->idx_bits; | |
579 | tformat->rsvd_shift = PPOD_IDX_SHIFT; | |
580 | tformat->rsvd_mask = (1 << tformat->rsvd_bits) - 1; | |
581 | ||
582 | ddp_log_info("tag format: sw %u, rsvd %u,%u, mask 0x%x.\n", | |
583 | tformat->sw_bits, tformat->rsvd_bits, | |
584 | tformat->rsvd_shift, tformat->rsvd_mask); | |
585 | ||
586 | *txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
587 | ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
588 | *rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
589 | ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
590 | ddp_log_info("max payload size: %u/%u, %u/%u.\n", | |
591 | *txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz); | |
592 | return 0; | |
593 | } | |
9fa1926a KX |
594 | |
595 | /** | |
5b2639d5 | 596 | * cxgb3i_ddp_cleanup - release the cxgb3 adapter's ddp resource |
9fa1926a KX |
597 | * @tdev: t3cdev adapter |
598 | * release all the resource held by the ddp pagepod manager for a given | |
599 | * adapter if needed | |
600 | */ | |
5b2639d5 | 601 | void cxgb3i_ddp_cleanup(struct t3cdev *tdev) |
9fa1926a KX |
602 | { |
603 | int i = 0; | |
604 | struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; | |
605 | ||
606 | ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp); | |
607 | ||
608 | if (ddp) { | |
609 | tdev->ulp_iscsi = NULL; | |
610 | while (i < ddp->nppods) { | |
611 | struct cxgb3i_gather_list *gl = ddp->gl_map[i]; | |
612 | if (gl) { | |
613 | int npods = (gl->nelem + PPOD_PAGES_MAX - 1) | |
614 | >> PPOD_PAGES_SHIFT; | |
615 | ddp_log_info("t3dev 0x%p, ddp %d + %d.\n", | |
616 | tdev, i, npods); | |
617 | kfree(gl); | |
618 | ddp_free_gl_skb(ddp, i, npods); | |
619 | i += npods; | |
620 | } else | |
621 | i++; | |
622 | } | |
623 | cxgb3i_free_big_mem(ddp); | |
624 | } | |
625 | } | |
626 | ||
627 | /** | |
628 | * ddp_init - initialize the cxgb3 adapter's ddp resource | |
629 | * @tdev: t3cdev adapter | |
630 | * initialize the ddp pagepod manager for a given adapter | |
631 | */ | |
632 | static void ddp_init(struct t3cdev *tdev) | |
c3673464 KX |
633 | { |
634 | struct cxgb3i_ddp_info *ddp; | |
635 | struct ulp_iscsi_info uinfo; | |
636 | unsigned int ppmax, bits; | |
637 | int i, err; | |
c3673464 | 638 | |
9fa1926a KX |
639 | if (tdev->ulp_iscsi) { |
640 | ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n", | |
641 | tdev, tdev->ulp_iscsi); | |
642 | return; | |
643 | } | |
644 | ||
c3673464 KX |
645 | err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); |
646 | if (err < 0) { | |
647 | ddp_log_error("%s, failed to get iscsi param err=%d.\n", | |
648 | tdev->name, err); | |
9fa1926a | 649 | return; |
c3673464 KX |
650 | } |
651 | ||
652 | ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT; | |
653 | bits = __ilog2_u32(ppmax) + 1; | |
654 | if (bits > PPOD_IDX_MAX_SIZE) | |
655 | bits = PPOD_IDX_MAX_SIZE; | |
656 | ppmax = (1 << (bits - 1)) - 1; | |
657 | ||
658 | ddp = cxgb3i_alloc_big_mem(sizeof(struct cxgb3i_ddp_info) + | |
659 | ppmax * | |
660 | (sizeof(struct cxgb3i_gather_list *) + | |
661 | sizeof(struct sk_buff *)), | |
662 | GFP_KERNEL); | |
663 | if (!ddp) { | |
664 | ddp_log_warn("%s unable to alloc ddp 0x%d, ddp disabled.\n", | |
665 | tdev->name, ppmax); | |
9fa1926a | 666 | return; |
c3673464 KX |
667 | } |
668 | ddp->gl_map = (struct cxgb3i_gather_list **)(ddp + 1); | |
669 | ddp->gl_skb = (struct sk_buff **)(((char *)ddp->gl_map) + | |
670 | ppmax * | |
671 | sizeof(struct cxgb3i_gather_list *)); | |
672 | spin_lock_init(&ddp->map_lock); | |
673 | ||
674 | ddp->tdev = tdev; | |
675 | ddp->pdev = uinfo.pdev; | |
676 | ddp->max_txsz = min_t(unsigned int, uinfo.max_txsz, ULP2_MAX_PKT_SIZE); | |
677 | ddp->max_rxsz = min_t(unsigned int, uinfo.max_rxsz, ULP2_MAX_PKT_SIZE); | |
678 | ddp->llimit = uinfo.llimit; | |
679 | ddp->ulimit = uinfo.ulimit; | |
680 | ddp->nppods = ppmax; | |
681 | ddp->idx_last = ppmax; | |
682 | ddp->idx_bits = bits; | |
683 | ddp->idx_mask = (1 << bits) - 1; | |
684 | ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1; | |
685 | ||
686 | uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; | |
687 | for (i = 0; i < DDP_PGIDX_MAX; i++) | |
688 | uinfo.pgsz_factor[i] = ddp_page_order[i]; | |
689 | uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT); | |
690 | ||
691 | err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); | |
692 | if (err < 0) { | |
693 | ddp_log_warn("%s unable to set iscsi param err=%d, " | |
694 | "ddp disabled.\n", tdev->name, err); | |
695 | goto free_ddp_map; | |
696 | } | |
697 | ||
698 | tdev->ulp_iscsi = ddp; | |
699 | ||
9fa1926a KX |
700 | ddp_log_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u," |
701 | " %u/%u.\n", | |
702 | tdev, ppmax, ddp->idx_bits, ddp->idx_mask, | |
703 | ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, | |
f62d0896 | 704 | ddp->max_rxsz, uinfo.max_rxsz); |
9fa1926a | 705 | return; |
c3673464 KX |
706 | |
707 | free_ddp_map: | |
708 | cxgb3i_free_big_mem(ddp); | |
c3673464 KX |
709 | } |
710 | ||
c3673464 | 711 | /** |
0d0c27f2 | 712 | * cxgb3i_ddp_init - initialize ddp functions |
c3673464 | 713 | */ |
0d0c27f2 | 714 | void cxgb3i_ddp_init(struct t3cdev *tdev) |
c3673464 | 715 | { |
0d0c27f2 KX |
716 | if (page_idx == DDP_PGIDX_MAX) { |
717 | page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE); | |
718 | ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n", | |
719 | PAGE_SIZE, page_idx); | |
720 | } | |
721 | ddp_init(tdev); | |
c3673464 | 722 | } |