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 | 208 | |
9194c626 KX |
209 | /** |
210 | * cxgb3i_ddp_adjust_page_table - adjust page table with PAGE_SIZE | |
211 | * return the ddp page index, if no match is found return DDP_PGIDX_MAX. | |
212 | */ | |
213 | int cxgb3i_ddp_adjust_page_table(void) | |
214 | { | |
215 | int i; | |
216 | unsigned int base_order, order; | |
217 | ||
218 | if (PAGE_SIZE < (1UL << ddp_page_shift[0])) { | |
219 | ddp_log_info("PAGE_SIZE 0x%lx too small, min. 0x%lx.\n", | |
220 | PAGE_SIZE, 1UL << ddp_page_shift[0]); | |
221 | return -EINVAL; | |
222 | } | |
223 | ||
224 | base_order = get_order(1UL << ddp_page_shift[0]); | |
225 | order = get_order(1 << PAGE_SHIFT); | |
226 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
227 | /* first is the kernel page size, then just doubling the size */ | |
228 | ddp_page_order[i] = order - base_order + i; | |
229 | ddp_page_shift[i] = PAGE_SHIFT + i; | |
230 | } | |
231 | return 0; | |
232 | } | |
233 | ||
c3673464 KX |
234 | static inline void ddp_gl_unmap(struct pci_dev *pdev, |
235 | struct cxgb3i_gather_list *gl) | |
236 | { | |
237 | int i; | |
238 | ||
239 | for (i = 0; i < gl->nelem; i++) | |
240 | pci_unmap_page(pdev, gl->phys_addr[i], PAGE_SIZE, | |
241 | PCI_DMA_FROMDEVICE); | |
242 | } | |
243 | ||
244 | static inline int ddp_gl_map(struct pci_dev *pdev, | |
245 | struct cxgb3i_gather_list *gl) | |
246 | { | |
247 | int i; | |
248 | ||
249 | for (i = 0; i < gl->nelem; i++) { | |
250 | gl->phys_addr[i] = pci_map_page(pdev, gl->pages[i], 0, | |
251 | PAGE_SIZE, | |
252 | PCI_DMA_FROMDEVICE); | |
253 | if (unlikely(pci_dma_mapping_error(pdev, gl->phys_addr[i]))) | |
254 | goto unmap; | |
255 | } | |
256 | ||
257 | return i; | |
258 | ||
259 | unmap: | |
260 | if (i) { | |
261 | unsigned int nelem = gl->nelem; | |
262 | ||
263 | gl->nelem = i; | |
264 | ddp_gl_unmap(pdev, gl); | |
265 | gl->nelem = nelem; | |
266 | } | |
267 | return -ENOMEM; | |
268 | } | |
269 | ||
270 | /** | |
271 | * cxgb3i_ddp_make_gl - build ddp page buffer list | |
272 | * @xferlen: total buffer length | |
273 | * @sgl: page buffer scatter-gather list | |
274 | * @sgcnt: # of page buffers | |
275 | * @pdev: pci_dev, used for pci map | |
276 | * @gfp: allocation mode | |
277 | * | |
278 | * construct a ddp page buffer list from the scsi scattergather list. | |
279 | * coalesce buffers as much as possible, and obtain dma addresses for | |
280 | * each page. | |
281 | * | |
282 | * Return the cxgb3i_gather_list constructed from the page buffers if the | |
283 | * memory can be used for ddp. Return NULL otherwise. | |
284 | */ | |
285 | struct cxgb3i_gather_list *cxgb3i_ddp_make_gl(unsigned int xferlen, | |
286 | struct scatterlist *sgl, | |
287 | unsigned int sgcnt, | |
288 | struct pci_dev *pdev, | |
289 | gfp_t gfp) | |
290 | { | |
291 | struct cxgb3i_gather_list *gl; | |
292 | struct scatterlist *sg = sgl; | |
293 | struct page *sgpage = sg_page(sg); | |
294 | unsigned int sglen = sg->length; | |
295 | unsigned int sgoffset = sg->offset; | |
296 | unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >> | |
297 | PAGE_SHIFT; | |
298 | int i = 1, j = 0; | |
299 | ||
300 | if (xferlen < DDP_THRESHOLD) { | |
301 | ddp_log_debug("xfer %u < threshold %u, no ddp.\n", | |
302 | xferlen, DDP_THRESHOLD); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | gl = kzalloc(sizeof(struct cxgb3i_gather_list) + | |
307 | npages * (sizeof(dma_addr_t) + sizeof(struct page *)), | |
308 | gfp); | |
309 | if (!gl) | |
310 | return NULL; | |
311 | ||
312 | gl->pages = (struct page **)&gl->phys_addr[npages]; | |
313 | gl->length = xferlen; | |
314 | gl->offset = sgoffset; | |
315 | gl->pages[0] = sgpage; | |
316 | ||
317 | sg = sg_next(sg); | |
318 | while (sg) { | |
319 | struct page *page = sg_page(sg); | |
320 | ||
321 | if (sgpage == page && sg->offset == sgoffset + sglen) | |
322 | sglen += sg->length; | |
323 | else { | |
324 | /* make sure the sgl is fit for ddp: | |
325 | * each has the same page size, and | |
326 | * all of the middle pages are used completely | |
327 | */ | |
328 | if ((j && sgoffset) || | |
329 | ((i != sgcnt - 1) && | |
330 | ((sglen + sgoffset) & ~PAGE_MASK))) | |
331 | goto error_out; | |
332 | ||
333 | j++; | |
334 | if (j == gl->nelem || sg->offset) | |
335 | goto error_out; | |
336 | gl->pages[j] = page; | |
337 | sglen = sg->length; | |
338 | sgoffset = sg->offset; | |
339 | sgpage = page; | |
340 | } | |
341 | i++; | |
342 | sg = sg_next(sg); | |
343 | } | |
344 | gl->nelem = ++j; | |
345 | ||
346 | if (ddp_gl_map(pdev, gl) < 0) | |
347 | goto error_out; | |
348 | ||
349 | return gl; | |
350 | ||
351 | error_out: | |
352 | kfree(gl); | |
353 | return NULL; | |
354 | } | |
c3673464 KX |
355 | |
356 | /** | |
357 | * cxgb3i_ddp_release_gl - release a page buffer list | |
358 | * @gl: a ddp page buffer list | |
359 | * @pdev: pci_dev used for pci_unmap | |
360 | * free a ddp page buffer list resulted from cxgb3i_ddp_make_gl(). | |
361 | */ | |
362 | void cxgb3i_ddp_release_gl(struct cxgb3i_gather_list *gl, | |
363 | struct pci_dev *pdev) | |
364 | { | |
365 | ddp_gl_unmap(pdev, gl); | |
366 | kfree(gl); | |
367 | } | |
c3673464 KX |
368 | |
369 | /** | |
370 | * cxgb3i_ddp_tag_reserve - set up ddp for a data transfer | |
371 | * @tdev: t3cdev adapter | |
372 | * @tid: connection id | |
373 | * @tformat: tag format | |
154229a3 | 374 | * @tagp: contains s/w tag initially, will be updated with ddp/hw tag |
c3673464 KX |
375 | * @gl: the page momory list |
376 | * @gfp: allocation mode | |
377 | * | |
378 | * ddp setup for a given page buffer list and construct the ddp tag. | |
379 | * return 0 if success, < 0 otherwise. | |
380 | */ | |
381 | int cxgb3i_ddp_tag_reserve(struct t3cdev *tdev, unsigned int tid, | |
382 | struct cxgb3i_tag_format *tformat, u32 *tagp, | |
383 | struct cxgb3i_gather_list *gl, gfp_t gfp) | |
384 | { | |
385 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; | |
386 | struct pagepod_hdr hdr; | |
387 | unsigned int npods; | |
a53922dd | 388 | int idx = -1; |
c3673464 KX |
389 | int err = -ENOMEM; |
390 | u32 sw_tag = *tagp; | |
391 | u32 tag; | |
392 | ||
393 | if (page_idx >= DDP_PGIDX_MAX || !ddp || !gl || !gl->nelem || | |
394 | gl->length < DDP_THRESHOLD) { | |
395 | ddp_log_debug("pgidx %u, xfer %u/%u, NO ddp.\n", | |
396 | page_idx, gl->length, DDP_THRESHOLD); | |
397 | return -EINVAL; | |
398 | } | |
399 | ||
400 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
c3673464 KX |
401 | |
402 | if (ddp->idx_last == ddp->nppods) | |
a53922dd | 403 | idx = ddp_find_unused_entries(ddp, 0, ddp->nppods, npods, gl); |
c3673464 KX |
404 | else { |
405 | idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1, | |
a53922dd | 406 | ddp->nppods, npods, gl); |
407 | if (idx < 0 && ddp->idx_last >= npods) { | |
c3673464 | 408 | idx = ddp_find_unused_entries(ddp, 0, |
a53922dd | 409 | min(ddp->idx_last + npods, ddp->nppods), |
c3673464 | 410 | npods, gl); |
a53922dd | 411 | } |
c3673464 KX |
412 | } |
413 | if (idx < 0) { | |
414 | ddp_log_debug("xferlen %u, gl %u, npods %u NO DDP.\n", | |
415 | gl->length, gl->nelem, npods); | |
416 | return idx; | |
417 | } | |
418 | ||
419 | err = ddp_alloc_gl_skb(ddp, idx, npods, gfp); | |
420 | if (err < 0) | |
421 | goto unmark_entries; | |
422 | ||
423 | tag = cxgb3i_ddp_tag_base(tformat, sw_tag); | |
424 | tag |= idx << PPOD_IDX_SHIFT; | |
425 | ||
426 | hdr.rsvd = 0; | |
427 | hdr.vld_tid = htonl(F_PPOD_VALID | V_PPOD_TID(tid)); | |
428 | hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask); | |
429 | hdr.maxoffset = htonl(gl->length); | |
430 | hdr.pgoffset = htonl(gl->offset); | |
431 | ||
432 | err = set_ddp_map(ddp, &hdr, idx, npods, gl); | |
433 | if (err < 0) | |
434 | goto free_gl_skb; | |
435 | ||
436 | ddp->idx_last = idx; | |
437 | ddp_log_debug("xfer %u, gl %u,%u, tid 0x%x, 0x%x -> 0x%x(%u,%u).\n", | |
438 | gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, | |
439 | idx, npods); | |
440 | *tagp = tag; | |
441 | return 0; | |
442 | ||
443 | free_gl_skb: | |
444 | ddp_free_gl_skb(ddp, idx, npods); | |
445 | unmark_entries: | |
446 | ddp_unmark_entries(ddp, idx, npods); | |
447 | return err; | |
448 | } | |
c3673464 KX |
449 | |
450 | /** | |
451 | * cxgb3i_ddp_tag_release - release a ddp tag | |
452 | * @tdev: t3cdev adapter | |
453 | * @tag: ddp tag | |
454 | * ddp cleanup for a given ddp tag and release all the resources held | |
455 | */ | |
456 | void cxgb3i_ddp_tag_release(struct t3cdev *tdev, u32 tag) | |
457 | { | |
458 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; | |
459 | u32 idx; | |
460 | ||
461 | if (!ddp) { | |
462 | ddp_log_error("release ddp tag 0x%x, ddp NULL.\n", tag); | |
463 | return; | |
464 | } | |
465 | ||
466 | idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask; | |
467 | if (idx < ddp->nppods) { | |
468 | struct cxgb3i_gather_list *gl = ddp->gl_map[idx]; | |
469 | unsigned int npods; | |
470 | ||
9fa1926a KX |
471 | if (!gl || !gl->nelem) { |
472 | ddp_log_error("release 0x%x, idx 0x%x, gl 0x%p, %u.\n", | |
473 | tag, idx, gl, gl ? gl->nelem : 0); | |
c3673464 KX |
474 | return; |
475 | } | |
476 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
477 | ddp_log_debug("ddp tag 0x%x, release idx 0x%x, npods %u.\n", | |
478 | tag, idx, npods); | |
9fa1926a | 479 | clear_ddp_map(ddp, tag, idx, npods); |
c3673464 KX |
480 | ddp_unmark_entries(ddp, idx, npods); |
481 | cxgb3i_ddp_release_gl(gl, ddp->pdev); | |
482 | } else | |
483 | ddp_log_error("ddp tag 0x%x, idx 0x%x > max 0x%x.\n", | |
484 | tag, idx, ddp->nppods); | |
485 | } | |
c3673464 KX |
486 | |
487 | static int setup_conn_pgidx(struct t3cdev *tdev, unsigned int tid, int pg_idx, | |
488 | int reply) | |
489 | { | |
490 | struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), | |
491 | GFP_KERNEL); | |
492 | struct cpl_set_tcb_field *req; | |
493 | u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; | |
494 | ||
495 | if (!skb) | |
496 | return -ENOMEM; | |
497 | ||
498 | /* set up ulp submode and page size */ | |
499 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
500 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
501 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
502 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
503 | req->cpu_idx = 0; | |
504 | req->word = htons(31); | |
505 | req->mask = cpu_to_be64(0xF0000000); | |
506 | req->val = cpu_to_be64(val << 28); | |
507 | skb->priority = CPL_PRIORITY_CONTROL; | |
508 | ||
509 | cxgb3_ofld_send(tdev, skb); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | /** | |
514 | * cxgb3i_setup_conn_host_pagesize - setup the conn.'s ddp page size | |
515 | * @tdev: t3cdev adapter | |
516 | * @tid: connection id | |
517 | * @reply: request reply from h/w | |
518 | * set up the ddp page size based on the host PAGE_SIZE for a connection | |
519 | * identified by tid | |
520 | */ | |
521 | int cxgb3i_setup_conn_host_pagesize(struct t3cdev *tdev, unsigned int tid, | |
522 | int reply) | |
523 | { | |
524 | return setup_conn_pgidx(tdev, tid, page_idx, reply); | |
525 | } | |
c3673464 KX |
526 | |
527 | /** | |
528 | * cxgb3i_setup_conn_pagesize - setup the conn.'s ddp page size | |
529 | * @tdev: t3cdev adapter | |
530 | * @tid: connection id | |
531 | * @reply: request reply from h/w | |
532 | * @pgsz: ddp page size | |
533 | * set up the ddp page size for a connection identified by tid | |
534 | */ | |
535 | int cxgb3i_setup_conn_pagesize(struct t3cdev *tdev, unsigned int tid, | |
536 | int reply, unsigned long pgsz) | |
537 | { | |
538 | int pgidx = cxgb3i_ddp_find_page_index(pgsz); | |
539 | ||
540 | return setup_conn_pgidx(tdev, tid, pgidx, reply); | |
541 | } | |
c3673464 KX |
542 | |
543 | /** | |
544 | * cxgb3i_setup_conn_digest - setup conn. digest setting | |
545 | * @tdev: t3cdev adapter | |
546 | * @tid: connection id | |
547 | * @hcrc: header digest enabled | |
548 | * @dcrc: data digest enabled | |
549 | * @reply: request reply from h/w | |
550 | * set up the iscsi digest settings for a connection identified by tid | |
551 | */ | |
552 | int cxgb3i_setup_conn_digest(struct t3cdev *tdev, unsigned int tid, | |
553 | int hcrc, int dcrc, int reply) | |
554 | { | |
555 | struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), | |
556 | GFP_KERNEL); | |
557 | struct cpl_set_tcb_field *req; | |
558 | u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); | |
559 | ||
560 | if (!skb) | |
561 | return -ENOMEM; | |
562 | ||
563 | /* set up ulp submode and page size */ | |
564 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
565 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
566 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
567 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
568 | req->cpu_idx = 0; | |
569 | req->word = htons(31); | |
570 | req->mask = cpu_to_be64(0x0F000000); | |
571 | req->val = cpu_to_be64(val << 24); | |
572 | skb->priority = CPL_PRIORITY_CONTROL; | |
573 | ||
574 | cxgb3_ofld_send(tdev, skb); | |
575 | return 0; | |
576 | } | |
c3673464 | 577 | |
9fa1926a KX |
578 | |
579 | /** | |
580 | * cxgb3i_adapter_ddp_info - read the adapter's ddp information | |
581 | * @tdev: t3cdev adapter | |
582 | * @tformat: tag format | |
583 | * @txsz: max tx pdu payload size, filled in by this func. | |
584 | * @rxsz: max rx pdu payload size, filled in by this func. | |
585 | * setup the tag format for a given iscsi entity | |
586 | */ | |
587 | int cxgb3i_adapter_ddp_info(struct t3cdev *tdev, | |
588 | struct cxgb3i_tag_format *tformat, | |
589 | unsigned int *txsz, unsigned int *rxsz) | |
590 | { | |
591 | struct cxgb3i_ddp_info *ddp; | |
592 | unsigned char idx_bits; | |
593 | ||
594 | if (!tformat) | |
595 | return -EINVAL; | |
596 | ||
597 | if (!tdev->ulp_iscsi) | |
598 | return -EINVAL; | |
599 | ||
600 | ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; | |
601 | ||
602 | idx_bits = 32 - tformat->sw_bits; | |
603 | tformat->rsvd_bits = ddp->idx_bits; | |
604 | tformat->rsvd_shift = PPOD_IDX_SHIFT; | |
605 | tformat->rsvd_mask = (1 << tformat->rsvd_bits) - 1; | |
606 | ||
607 | ddp_log_info("tag format: sw %u, rsvd %u,%u, mask 0x%x.\n", | |
608 | tformat->sw_bits, tformat->rsvd_bits, | |
609 | tformat->rsvd_shift, tformat->rsvd_mask); | |
610 | ||
611 | *txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
612 | ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
613 | *rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
614 | ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
615 | ddp_log_info("max payload size: %u/%u, %u/%u.\n", | |
616 | *txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz); | |
617 | return 0; | |
618 | } | |
9fa1926a KX |
619 | |
620 | /** | |
5b2639d5 | 621 | * cxgb3i_ddp_cleanup - release the cxgb3 adapter's ddp resource |
9fa1926a KX |
622 | * @tdev: t3cdev adapter |
623 | * release all the resource held by the ddp pagepod manager for a given | |
624 | * adapter if needed | |
625 | */ | |
295ab1b5 KX |
626 | |
627 | static void ddp_cleanup(struct kref *kref) | |
9fa1926a | 628 | { |
295ab1b5 KX |
629 | struct cxgb3i_ddp_info *ddp = container_of(kref, |
630 | struct cxgb3i_ddp_info, | |
631 | refcnt); | |
9fa1926a | 632 | int i = 0; |
295ab1b5 KX |
633 | |
634 | ddp_log_info("kref release ddp 0x%p, t3dev 0x%p.\n", ddp, ddp->tdev); | |
635 | ||
636 | ddp->tdev->ulp_iscsi = NULL; | |
637 | while (i < ddp->nppods) { | |
638 | struct cxgb3i_gather_list *gl = ddp->gl_map[i]; | |
639 | if (gl) { | |
640 | int npods = (gl->nelem + PPOD_PAGES_MAX - 1) | |
641 | >> PPOD_PAGES_SHIFT; | |
642 | ddp_log_info("t3dev 0x%p, ddp %d + %d.\n", | |
643 | ddp->tdev, i, npods); | |
644 | kfree(gl); | |
645 | ddp_free_gl_skb(ddp, i, npods); | |
646 | i += npods; | |
647 | } else | |
648 | i++; | |
649 | } | |
650 | cxgb3i_free_big_mem(ddp); | |
651 | } | |
652 | ||
653 | void cxgb3i_ddp_cleanup(struct t3cdev *tdev) | |
654 | { | |
9fa1926a KX |
655 | struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; |
656 | ||
657 | ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp); | |
295ab1b5 KX |
658 | if (ddp) |
659 | kref_put(&ddp->refcnt, ddp_cleanup); | |
9fa1926a KX |
660 | } |
661 | ||
662 | /** | |
663 | * ddp_init - initialize the cxgb3 adapter's ddp resource | |
664 | * @tdev: t3cdev adapter | |
665 | * initialize the ddp pagepod manager for a given adapter | |
666 | */ | |
667 | static void ddp_init(struct t3cdev *tdev) | |
c3673464 | 668 | { |
295ab1b5 | 669 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; |
c3673464 KX |
670 | struct ulp_iscsi_info uinfo; |
671 | unsigned int ppmax, bits; | |
672 | int i, err; | |
c3673464 | 673 | |
295ab1b5 KX |
674 | if (ddp) { |
675 | kref_get(&ddp->refcnt); | |
9fa1926a KX |
676 | ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n", |
677 | tdev, tdev->ulp_iscsi); | |
678 | return; | |
679 | } | |
680 | ||
c3673464 KX |
681 | err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); |
682 | if (err < 0) { | |
683 | ddp_log_error("%s, failed to get iscsi param err=%d.\n", | |
684 | tdev->name, err); | |
9fa1926a | 685 | return; |
c3673464 KX |
686 | } |
687 | ||
688 | ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT; | |
689 | bits = __ilog2_u32(ppmax) + 1; | |
690 | if (bits > PPOD_IDX_MAX_SIZE) | |
691 | bits = PPOD_IDX_MAX_SIZE; | |
692 | ppmax = (1 << (bits - 1)) - 1; | |
693 | ||
694 | ddp = cxgb3i_alloc_big_mem(sizeof(struct cxgb3i_ddp_info) + | |
695 | ppmax * | |
696 | (sizeof(struct cxgb3i_gather_list *) + | |
697 | sizeof(struct sk_buff *)), | |
698 | GFP_KERNEL); | |
699 | if (!ddp) { | |
700 | ddp_log_warn("%s unable to alloc ddp 0x%d, ddp disabled.\n", | |
701 | tdev->name, ppmax); | |
9fa1926a | 702 | return; |
c3673464 KX |
703 | } |
704 | ddp->gl_map = (struct cxgb3i_gather_list **)(ddp + 1); | |
705 | ddp->gl_skb = (struct sk_buff **)(((char *)ddp->gl_map) + | |
706 | ppmax * | |
707 | sizeof(struct cxgb3i_gather_list *)); | |
708 | spin_lock_init(&ddp->map_lock); | |
295ab1b5 | 709 | kref_init(&ddp->refcnt); |
c3673464 KX |
710 | |
711 | ddp->tdev = tdev; | |
712 | ddp->pdev = uinfo.pdev; | |
713 | ddp->max_txsz = min_t(unsigned int, uinfo.max_txsz, ULP2_MAX_PKT_SIZE); | |
714 | ddp->max_rxsz = min_t(unsigned int, uinfo.max_rxsz, ULP2_MAX_PKT_SIZE); | |
715 | ddp->llimit = uinfo.llimit; | |
716 | ddp->ulimit = uinfo.ulimit; | |
717 | ddp->nppods = ppmax; | |
718 | ddp->idx_last = ppmax; | |
719 | ddp->idx_bits = bits; | |
720 | ddp->idx_mask = (1 << bits) - 1; | |
721 | ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1; | |
722 | ||
723 | uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; | |
724 | for (i = 0; i < DDP_PGIDX_MAX; i++) | |
725 | uinfo.pgsz_factor[i] = ddp_page_order[i]; | |
726 | uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT); | |
727 | ||
728 | err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); | |
729 | if (err < 0) { | |
730 | ddp_log_warn("%s unable to set iscsi param err=%d, " | |
731 | "ddp disabled.\n", tdev->name, err); | |
732 | goto free_ddp_map; | |
733 | } | |
734 | ||
735 | tdev->ulp_iscsi = ddp; | |
736 | ||
9fa1926a KX |
737 | ddp_log_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u," |
738 | " %u/%u.\n", | |
739 | tdev, ppmax, ddp->idx_bits, ddp->idx_mask, | |
740 | ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, | |
f62d0896 | 741 | ddp->max_rxsz, uinfo.max_rxsz); |
9fa1926a | 742 | return; |
c3673464 KX |
743 | |
744 | free_ddp_map: | |
745 | cxgb3i_free_big_mem(ddp); | |
c3673464 KX |
746 | } |
747 | ||
c3673464 | 748 | /** |
0d0c27f2 | 749 | * cxgb3i_ddp_init - initialize ddp functions |
c3673464 | 750 | */ |
0d0c27f2 | 751 | void cxgb3i_ddp_init(struct t3cdev *tdev) |
c3673464 | 752 | { |
0d0c27f2 KX |
753 | if (page_idx == DDP_PGIDX_MAX) { |
754 | page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE); | |
9194c626 KX |
755 | |
756 | if (page_idx == DDP_PGIDX_MAX) { | |
757 | ddp_log_info("system PAGE_SIZE %lu, update hw.\n", | |
758 | PAGE_SIZE); | |
759 | if (cxgb3i_ddp_adjust_page_table() < 0) { | |
760 | ddp_log_info("PAGE_SIZE %lu, ddp disabled.\n", | |
761 | PAGE_SIZE); | |
762 | return; | |
763 | } | |
764 | page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE); | |
765 | } | |
0d0c27f2 KX |
766 | ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n", |
767 | PAGE_SIZE, page_idx); | |
768 | } | |
769 | ddp_init(tdev); | |
c3673464 | 770 | } |