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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 | ||
5a0e3ad6 | 13 | #include <linux/slab.h> |
c3673464 | 14 | #include <linux/skbuff.h> |
574df408 | 15 | #include <linux/scatterlist.h> |
c3673464 KX |
16 | |
17 | /* from cxgb3 LLD */ | |
18 | #include "common.h" | |
19 | #include "t3_cpl.h" | |
20 | #include "t3cdev.h" | |
21 | #include "cxgb3_ctl_defs.h" | |
22 | #include "cxgb3_offload.h" | |
23 | #include "firmware_exports.h" | |
24 | ||
25 | #include "cxgb3i_ddp.h" | |
26 | ||
c3673464 KX |
27 | #define ddp_log_error(fmt...) printk(KERN_ERR "cxgb3i_ddp: ERR! " fmt) |
28 | #define ddp_log_warn(fmt...) printk(KERN_WARNING "cxgb3i_ddp: WARN! " fmt) | |
29 | #define ddp_log_info(fmt...) printk(KERN_INFO "cxgb3i_ddp: " fmt) | |
30 | ||
31 | #ifdef __DEBUG_CXGB3I_DDP__ | |
32 | #define ddp_log_debug(fmt, args...) \ | |
33 | printk(KERN_INFO "cxgb3i_ddp: %s - " fmt, __func__ , ## args) | |
34 | #else | |
35 | #define ddp_log_debug(fmt...) | |
36 | #endif | |
37 | ||
38 | /* | |
39 | * iSCSI Direct Data Placement | |
40 | * | |
41 | * T3 h/w can directly place the iSCSI Data-In or Data-Out PDU's payload into | |
42 | * pre-posted final destination host-memory buffers based on the Initiator | |
43 | * Task Tag (ITT) in Data-In or Target Task Tag (TTT) in Data-Out PDUs. | |
44 | * | |
45 | * The host memory address is programmed into h/w in the format of pagepod | |
46 | * entries. | |
47 | * The location of the pagepod entry is encoded into ddp tag which is used or | |
48 | * is the base for ITT/TTT. | |
49 | */ | |
50 | ||
51 | #define DDP_PGIDX_MAX 4 | |
52 | #define DDP_THRESHOLD 2048 | |
53 | static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4}; | |
54 | static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16}; | |
55 | static unsigned char page_idx = DDP_PGIDX_MAX; | |
56 | ||
c3673464 KX |
57 | /* |
58 | * functions to program the pagepod in h/w | |
59 | */ | |
60 | static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) | |
61 | { | |
62 | struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; | |
63 | ||
64 | req->wr.wr_lo = 0; | |
65 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); | |
66 | req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | | |
67 | V_ULPTX_CMD(ULP_MEM_WRITE)); | |
68 | req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) | | |
69 | V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1)); | |
70 | } | |
71 | ||
72 | static int set_ddp_map(struct cxgb3i_ddp_info *ddp, struct pagepod_hdr *hdr, | |
73 | unsigned int idx, unsigned int npods, | |
74 | struct cxgb3i_gather_list *gl) | |
75 | { | |
76 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; | |
77 | int i; | |
78 | ||
79 | for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { | |
80 | struct sk_buff *skb = ddp->gl_skb[idx]; | |
81 | struct pagepod *ppod; | |
82 | int j, pidx; | |
83 | ||
84 | /* hold on to the skb until we clear the ddp mapping */ | |
85 | skb_get(skb); | |
86 | ||
87 | ulp_mem_io_set_hdr(skb, pm_addr); | |
88 | ppod = (struct pagepod *) | |
89 | (skb->head + sizeof(struct ulp_mem_io)); | |
90 | memcpy(&(ppod->hdr), hdr, sizeof(struct pagepod)); | |
91 | for (pidx = 4 * i, j = 0; j < 5; ++j, ++pidx) | |
92 | ppod->addr[j] = pidx < gl->nelem ? | |
93 | cpu_to_be64(gl->phys_addr[pidx]) : 0UL; | |
94 | ||
95 | skb->priority = CPL_PRIORITY_CONTROL; | |
96 | cxgb3_ofld_send(ddp->tdev, skb); | |
97 | } | |
98 | return 0; | |
99 | } | |
100 | ||
9fa1926a KX |
101 | static void clear_ddp_map(struct cxgb3i_ddp_info *ddp, unsigned int tag, |
102 | unsigned int idx, unsigned int npods) | |
c3673464 KX |
103 | { |
104 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; | |
105 | int i; | |
106 | ||
107 | for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { | |
108 | struct sk_buff *skb = ddp->gl_skb[idx]; | |
109 | ||
9fa1926a KX |
110 | if (!skb) { |
111 | ddp_log_error("ddp tag 0x%x, 0x%x, %d/%u, skb NULL.\n", | |
112 | tag, idx, i, npods); | |
113 | continue; | |
114 | } | |
c3673464 KX |
115 | ddp->gl_skb[idx] = NULL; |
116 | memset((skb->head + sizeof(struct ulp_mem_io)), 0, PPOD_SIZE); | |
117 | ulp_mem_io_set_hdr(skb, pm_addr); | |
118 | skb->priority = CPL_PRIORITY_CONTROL; | |
119 | cxgb3_ofld_send(ddp->tdev, skb); | |
120 | } | |
c3673464 KX |
121 | } |
122 | ||
123 | static inline int ddp_find_unused_entries(struct cxgb3i_ddp_info *ddp, | |
a53922dd | 124 | unsigned int start, unsigned int max, |
125 | unsigned int count, | |
c3673464 KX |
126 | struct cxgb3i_gather_list *gl) |
127 | { | |
a53922dd | 128 | unsigned int i, j, k; |
c3673464 | 129 | |
a53922dd | 130 | /* not enough entries */ |
131 | if ((max - start) < count) | |
132 | return -EBUSY; | |
133 | ||
134 | max -= count; | |
c3673464 | 135 | spin_lock(&ddp->map_lock); |
a53922dd | 136 | for (i = start; i < max;) { |
137 | for (j = 0, k = i; j < count; j++, k++) { | |
138 | if (ddp->gl_map[k]) | |
c3673464 KX |
139 | break; |
140 | } | |
141 | if (j == count) { | |
a53922dd | 142 | for (j = 0, k = i; j < count; j++, k++) |
143 | ddp->gl_map[k] = gl; | |
c3673464 KX |
144 | spin_unlock(&ddp->map_lock); |
145 | return i; | |
146 | } | |
147 | i += j + 1; | |
148 | } | |
149 | spin_unlock(&ddp->map_lock); | |
150 | return -EBUSY; | |
151 | } | |
152 | ||
153 | static inline void ddp_unmark_entries(struct cxgb3i_ddp_info *ddp, | |
154 | int start, int count) | |
155 | { | |
156 | spin_lock(&ddp->map_lock); | |
157 | memset(&ddp->gl_map[start], 0, | |
158 | count * sizeof(struct cxgb3i_gather_list *)); | |
159 | spin_unlock(&ddp->map_lock); | |
160 | } | |
161 | ||
162 | static inline void ddp_free_gl_skb(struct cxgb3i_ddp_info *ddp, | |
163 | int idx, int count) | |
164 | { | |
165 | int i; | |
166 | ||
167 | for (i = 0; i < count; i++, idx++) | |
168 | if (ddp->gl_skb[idx]) { | |
169 | kfree_skb(ddp->gl_skb[idx]); | |
170 | ddp->gl_skb[idx] = NULL; | |
171 | } | |
172 | } | |
173 | ||
174 | static inline int ddp_alloc_gl_skb(struct cxgb3i_ddp_info *ddp, int idx, | |
175 | int count, gfp_t gfp) | |
176 | { | |
177 | int i; | |
178 | ||
179 | for (i = 0; i < count; i++) { | |
180 | struct sk_buff *skb = alloc_skb(sizeof(struct ulp_mem_io) + | |
181 | PPOD_SIZE, gfp); | |
182 | if (skb) { | |
183 | ddp->gl_skb[idx + i] = skb; | |
184 | skb_put(skb, sizeof(struct ulp_mem_io) + PPOD_SIZE); | |
185 | } else { | |
186 | ddp_free_gl_skb(ddp, idx, i); | |
187 | return -ENOMEM; | |
188 | } | |
189 | } | |
190 | return 0; | |
191 | } | |
192 | ||
193 | /** | |
154229a3 | 194 | * cxgb3i_ddp_find_page_index - return ddp page index for a given page size |
c3673464 KX |
195 | * @pgsz: page size |
196 | * return the ddp page index, if no match is found return DDP_PGIDX_MAX. | |
197 | */ | |
198 | int cxgb3i_ddp_find_page_index(unsigned long pgsz) | |
199 | { | |
200 | int i; | |
201 | ||
202 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
203 | if (pgsz == (1UL << ddp_page_shift[i])) | |
204 | return i; | |
205 | } | |
206 | ddp_log_debug("ddp page size 0x%lx not supported.\n", pgsz); | |
207 | return DDP_PGIDX_MAX; | |
208 | } | |
c3673464 | 209 | |
9194c626 KX |
210 | /** |
211 | * cxgb3i_ddp_adjust_page_table - adjust page table with PAGE_SIZE | |
212 | * return the ddp page index, if no match is found return DDP_PGIDX_MAX. | |
213 | */ | |
214 | int cxgb3i_ddp_adjust_page_table(void) | |
215 | { | |
216 | int i; | |
217 | unsigned int base_order, order; | |
218 | ||
219 | if (PAGE_SIZE < (1UL << ddp_page_shift[0])) { | |
220 | ddp_log_info("PAGE_SIZE 0x%lx too small, min. 0x%lx.\n", | |
221 | PAGE_SIZE, 1UL << ddp_page_shift[0]); | |
222 | return -EINVAL; | |
223 | } | |
224 | ||
225 | base_order = get_order(1UL << ddp_page_shift[0]); | |
226 | order = get_order(1 << PAGE_SHIFT); | |
227 | for (i = 0; i < DDP_PGIDX_MAX; i++) { | |
228 | /* first is the kernel page size, then just doubling the size */ | |
229 | ddp_page_order[i] = order - base_order + i; | |
230 | ddp_page_shift[i] = PAGE_SHIFT + i; | |
231 | } | |
232 | return 0; | |
233 | } | |
234 | ||
c3673464 KX |
235 | static inline void ddp_gl_unmap(struct pci_dev *pdev, |
236 | struct cxgb3i_gather_list *gl) | |
237 | { | |
238 | int i; | |
239 | ||
240 | for (i = 0; i < gl->nelem; i++) | |
241 | pci_unmap_page(pdev, gl->phys_addr[i], PAGE_SIZE, | |
242 | PCI_DMA_FROMDEVICE); | |
243 | } | |
244 | ||
245 | static inline int ddp_gl_map(struct pci_dev *pdev, | |
246 | struct cxgb3i_gather_list *gl) | |
247 | { | |
248 | int i; | |
249 | ||
250 | for (i = 0; i < gl->nelem; i++) { | |
251 | gl->phys_addr[i] = pci_map_page(pdev, gl->pages[i], 0, | |
252 | PAGE_SIZE, | |
253 | PCI_DMA_FROMDEVICE); | |
254 | if (unlikely(pci_dma_mapping_error(pdev, gl->phys_addr[i]))) | |
255 | goto unmap; | |
256 | } | |
257 | ||
258 | return i; | |
259 | ||
260 | unmap: | |
261 | if (i) { | |
262 | unsigned int nelem = gl->nelem; | |
263 | ||
264 | gl->nelem = i; | |
265 | ddp_gl_unmap(pdev, gl); | |
266 | gl->nelem = nelem; | |
267 | } | |
268 | return -ENOMEM; | |
269 | } | |
270 | ||
271 | /** | |
272 | * cxgb3i_ddp_make_gl - build ddp page buffer list | |
273 | * @xferlen: total buffer length | |
274 | * @sgl: page buffer scatter-gather list | |
275 | * @sgcnt: # of page buffers | |
276 | * @pdev: pci_dev, used for pci map | |
277 | * @gfp: allocation mode | |
278 | * | |
279 | * construct a ddp page buffer list from the scsi scattergather list. | |
280 | * coalesce buffers as much as possible, and obtain dma addresses for | |
281 | * each page. | |
282 | * | |
283 | * Return the cxgb3i_gather_list constructed from the page buffers if the | |
284 | * memory can be used for ddp. Return NULL otherwise. | |
285 | */ | |
286 | struct cxgb3i_gather_list *cxgb3i_ddp_make_gl(unsigned int xferlen, | |
287 | struct scatterlist *sgl, | |
288 | unsigned int sgcnt, | |
289 | struct pci_dev *pdev, | |
290 | gfp_t gfp) | |
291 | { | |
292 | struct cxgb3i_gather_list *gl; | |
293 | struct scatterlist *sg = sgl; | |
294 | struct page *sgpage = sg_page(sg); | |
295 | unsigned int sglen = sg->length; | |
296 | unsigned int sgoffset = sg->offset; | |
297 | unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >> | |
298 | PAGE_SHIFT; | |
299 | int i = 1, j = 0; | |
300 | ||
301 | if (xferlen < DDP_THRESHOLD) { | |
302 | ddp_log_debug("xfer %u < threshold %u, no ddp.\n", | |
303 | xferlen, DDP_THRESHOLD); | |
304 | return NULL; | |
305 | } | |
306 | ||
307 | gl = kzalloc(sizeof(struct cxgb3i_gather_list) + | |
308 | npages * (sizeof(dma_addr_t) + sizeof(struct page *)), | |
309 | gfp); | |
310 | if (!gl) | |
311 | return NULL; | |
312 | ||
313 | gl->pages = (struct page **)&gl->phys_addr[npages]; | |
314 | gl->length = xferlen; | |
315 | gl->offset = sgoffset; | |
316 | gl->pages[0] = sgpage; | |
317 | ||
318 | sg = sg_next(sg); | |
319 | while (sg) { | |
320 | struct page *page = sg_page(sg); | |
321 | ||
322 | if (sgpage == page && sg->offset == sgoffset + sglen) | |
323 | sglen += sg->length; | |
324 | else { | |
325 | /* make sure the sgl is fit for ddp: | |
326 | * each has the same page size, and | |
327 | * all of the middle pages are used completely | |
328 | */ | |
329 | if ((j && sgoffset) || | |
330 | ((i != sgcnt - 1) && | |
331 | ((sglen + sgoffset) & ~PAGE_MASK))) | |
332 | goto error_out; | |
333 | ||
334 | j++; | |
335 | if (j == gl->nelem || sg->offset) | |
336 | goto error_out; | |
337 | gl->pages[j] = page; | |
338 | sglen = sg->length; | |
339 | sgoffset = sg->offset; | |
340 | sgpage = page; | |
341 | } | |
342 | i++; | |
343 | sg = sg_next(sg); | |
344 | } | |
345 | gl->nelem = ++j; | |
346 | ||
347 | if (ddp_gl_map(pdev, gl) < 0) | |
348 | goto error_out; | |
349 | ||
350 | return gl; | |
351 | ||
352 | error_out: | |
353 | kfree(gl); | |
354 | return NULL; | |
355 | } | |
c3673464 KX |
356 | |
357 | /** | |
358 | * cxgb3i_ddp_release_gl - release a page buffer list | |
359 | * @gl: a ddp page buffer list | |
360 | * @pdev: pci_dev used for pci_unmap | |
361 | * free a ddp page buffer list resulted from cxgb3i_ddp_make_gl(). | |
362 | */ | |
363 | void cxgb3i_ddp_release_gl(struct cxgb3i_gather_list *gl, | |
364 | struct pci_dev *pdev) | |
365 | { | |
366 | ddp_gl_unmap(pdev, gl); | |
367 | kfree(gl); | |
368 | } | |
c3673464 KX |
369 | |
370 | /** | |
371 | * cxgb3i_ddp_tag_reserve - set up ddp for a data transfer | |
372 | * @tdev: t3cdev adapter | |
373 | * @tid: connection id | |
374 | * @tformat: tag format | |
154229a3 | 375 | * @tagp: contains s/w tag initially, will be updated with ddp/hw tag |
c3673464 KX |
376 | * @gl: the page momory list |
377 | * @gfp: allocation mode | |
378 | * | |
379 | * ddp setup for a given page buffer list and construct the ddp tag. | |
380 | * return 0 if success, < 0 otherwise. | |
381 | */ | |
382 | int cxgb3i_ddp_tag_reserve(struct t3cdev *tdev, unsigned int tid, | |
383 | struct cxgb3i_tag_format *tformat, u32 *tagp, | |
384 | struct cxgb3i_gather_list *gl, gfp_t gfp) | |
385 | { | |
386 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; | |
387 | struct pagepod_hdr hdr; | |
388 | unsigned int npods; | |
a53922dd | 389 | int idx = -1; |
c3673464 KX |
390 | int err = -ENOMEM; |
391 | u32 sw_tag = *tagp; | |
392 | u32 tag; | |
393 | ||
394 | if (page_idx >= DDP_PGIDX_MAX || !ddp || !gl || !gl->nelem || | |
395 | gl->length < DDP_THRESHOLD) { | |
396 | ddp_log_debug("pgidx %u, xfer %u/%u, NO ddp.\n", | |
397 | page_idx, gl->length, DDP_THRESHOLD); | |
398 | return -EINVAL; | |
399 | } | |
400 | ||
401 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
c3673464 KX |
402 | |
403 | if (ddp->idx_last == ddp->nppods) | |
a53922dd | 404 | idx = ddp_find_unused_entries(ddp, 0, ddp->nppods, npods, gl); |
c3673464 KX |
405 | else { |
406 | idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1, | |
a53922dd | 407 | ddp->nppods, npods, gl); |
408 | if (idx < 0 && ddp->idx_last >= npods) { | |
c3673464 | 409 | idx = ddp_find_unused_entries(ddp, 0, |
a53922dd | 410 | min(ddp->idx_last + npods, ddp->nppods), |
c3673464 | 411 | npods, gl); |
a53922dd | 412 | } |
c3673464 KX |
413 | } |
414 | if (idx < 0) { | |
415 | ddp_log_debug("xferlen %u, gl %u, npods %u NO DDP.\n", | |
416 | gl->length, gl->nelem, npods); | |
417 | return idx; | |
418 | } | |
419 | ||
420 | err = ddp_alloc_gl_skb(ddp, idx, npods, gfp); | |
421 | if (err < 0) | |
422 | goto unmark_entries; | |
423 | ||
424 | tag = cxgb3i_ddp_tag_base(tformat, sw_tag); | |
425 | tag |= idx << PPOD_IDX_SHIFT; | |
426 | ||
427 | hdr.rsvd = 0; | |
428 | hdr.vld_tid = htonl(F_PPOD_VALID | V_PPOD_TID(tid)); | |
429 | hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask); | |
430 | hdr.maxoffset = htonl(gl->length); | |
431 | hdr.pgoffset = htonl(gl->offset); | |
432 | ||
433 | err = set_ddp_map(ddp, &hdr, idx, npods, gl); | |
434 | if (err < 0) | |
435 | goto free_gl_skb; | |
436 | ||
437 | ddp->idx_last = idx; | |
438 | ddp_log_debug("xfer %u, gl %u,%u, tid 0x%x, 0x%x -> 0x%x(%u,%u).\n", | |
439 | gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, | |
440 | idx, npods); | |
441 | *tagp = tag; | |
442 | return 0; | |
443 | ||
444 | free_gl_skb: | |
445 | ddp_free_gl_skb(ddp, idx, npods); | |
446 | unmark_entries: | |
447 | ddp_unmark_entries(ddp, idx, npods); | |
448 | return err; | |
449 | } | |
c3673464 KX |
450 | |
451 | /** | |
452 | * cxgb3i_ddp_tag_release - release a ddp tag | |
453 | * @tdev: t3cdev adapter | |
454 | * @tag: ddp tag | |
455 | * ddp cleanup for a given ddp tag and release all the resources held | |
456 | */ | |
457 | void cxgb3i_ddp_tag_release(struct t3cdev *tdev, u32 tag) | |
458 | { | |
459 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; | |
460 | u32 idx; | |
461 | ||
462 | if (!ddp) { | |
463 | ddp_log_error("release ddp tag 0x%x, ddp NULL.\n", tag); | |
464 | return; | |
465 | } | |
466 | ||
467 | idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask; | |
468 | if (idx < ddp->nppods) { | |
469 | struct cxgb3i_gather_list *gl = ddp->gl_map[idx]; | |
470 | unsigned int npods; | |
471 | ||
9fa1926a KX |
472 | if (!gl || !gl->nelem) { |
473 | ddp_log_error("release 0x%x, idx 0x%x, gl 0x%p, %u.\n", | |
474 | tag, idx, gl, gl ? gl->nelem : 0); | |
c3673464 KX |
475 | return; |
476 | } | |
477 | npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; | |
478 | ddp_log_debug("ddp tag 0x%x, release idx 0x%x, npods %u.\n", | |
479 | tag, idx, npods); | |
9fa1926a | 480 | clear_ddp_map(ddp, tag, idx, npods); |
c3673464 KX |
481 | ddp_unmark_entries(ddp, idx, npods); |
482 | cxgb3i_ddp_release_gl(gl, ddp->pdev); | |
483 | } else | |
484 | ddp_log_error("ddp tag 0x%x, idx 0x%x > max 0x%x.\n", | |
485 | tag, idx, ddp->nppods); | |
486 | } | |
c3673464 KX |
487 | |
488 | static int setup_conn_pgidx(struct t3cdev *tdev, unsigned int tid, int pg_idx, | |
489 | int reply) | |
490 | { | |
491 | struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), | |
492 | GFP_KERNEL); | |
493 | struct cpl_set_tcb_field *req; | |
494 | u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; | |
495 | ||
496 | if (!skb) | |
497 | return -ENOMEM; | |
498 | ||
499 | /* set up ulp submode and page size */ | |
500 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
501 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
502 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
503 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
504 | req->cpu_idx = 0; | |
505 | req->word = htons(31); | |
506 | req->mask = cpu_to_be64(0xF0000000); | |
507 | req->val = cpu_to_be64(val << 28); | |
508 | skb->priority = CPL_PRIORITY_CONTROL; | |
509 | ||
510 | cxgb3_ofld_send(tdev, skb); | |
511 | return 0; | |
512 | } | |
513 | ||
514 | /** | |
515 | * cxgb3i_setup_conn_host_pagesize - setup the conn.'s ddp page size | |
516 | * @tdev: t3cdev adapter | |
517 | * @tid: connection id | |
518 | * @reply: request reply from h/w | |
519 | * set up the ddp page size based on the host PAGE_SIZE for a connection | |
520 | * identified by tid | |
521 | */ | |
522 | int cxgb3i_setup_conn_host_pagesize(struct t3cdev *tdev, unsigned int tid, | |
523 | int reply) | |
524 | { | |
525 | return setup_conn_pgidx(tdev, tid, page_idx, reply); | |
526 | } | |
c3673464 KX |
527 | |
528 | /** | |
529 | * cxgb3i_setup_conn_pagesize - setup the conn.'s ddp page size | |
530 | * @tdev: t3cdev adapter | |
531 | * @tid: connection id | |
532 | * @reply: request reply from h/w | |
533 | * @pgsz: ddp page size | |
534 | * set up the ddp page size for a connection identified by tid | |
535 | */ | |
536 | int cxgb3i_setup_conn_pagesize(struct t3cdev *tdev, unsigned int tid, | |
537 | int reply, unsigned long pgsz) | |
538 | { | |
539 | int pgidx = cxgb3i_ddp_find_page_index(pgsz); | |
540 | ||
541 | return setup_conn_pgidx(tdev, tid, pgidx, reply); | |
542 | } | |
c3673464 KX |
543 | |
544 | /** | |
545 | * cxgb3i_setup_conn_digest - setup conn. digest setting | |
546 | * @tdev: t3cdev adapter | |
547 | * @tid: connection id | |
548 | * @hcrc: header digest enabled | |
549 | * @dcrc: data digest enabled | |
550 | * @reply: request reply from h/w | |
551 | * set up the iscsi digest settings for a connection identified by tid | |
552 | */ | |
553 | int cxgb3i_setup_conn_digest(struct t3cdev *tdev, unsigned int tid, | |
554 | int hcrc, int dcrc, int reply) | |
555 | { | |
556 | struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), | |
557 | GFP_KERNEL); | |
558 | struct cpl_set_tcb_field *req; | |
559 | u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); | |
560 | ||
561 | if (!skb) | |
562 | return -ENOMEM; | |
563 | ||
564 | /* set up ulp submode and page size */ | |
565 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
566 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
567 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
568 | req->reply = V_NO_REPLY(reply ? 0 : 1); | |
569 | req->cpu_idx = 0; | |
570 | req->word = htons(31); | |
571 | req->mask = cpu_to_be64(0x0F000000); | |
572 | req->val = cpu_to_be64(val << 24); | |
573 | skb->priority = CPL_PRIORITY_CONTROL; | |
574 | ||
575 | cxgb3_ofld_send(tdev, skb); | |
576 | return 0; | |
577 | } | |
c3673464 | 578 | |
9fa1926a KX |
579 | |
580 | /** | |
581 | * cxgb3i_adapter_ddp_info - read the adapter's ddp information | |
582 | * @tdev: t3cdev adapter | |
583 | * @tformat: tag format | |
584 | * @txsz: max tx pdu payload size, filled in by this func. | |
585 | * @rxsz: max rx pdu payload size, filled in by this func. | |
586 | * setup the tag format for a given iscsi entity | |
587 | */ | |
588 | int cxgb3i_adapter_ddp_info(struct t3cdev *tdev, | |
589 | struct cxgb3i_tag_format *tformat, | |
590 | unsigned int *txsz, unsigned int *rxsz) | |
591 | { | |
592 | struct cxgb3i_ddp_info *ddp; | |
593 | unsigned char idx_bits; | |
594 | ||
595 | if (!tformat) | |
596 | return -EINVAL; | |
597 | ||
598 | if (!tdev->ulp_iscsi) | |
599 | return -EINVAL; | |
600 | ||
601 | ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; | |
602 | ||
603 | idx_bits = 32 - tformat->sw_bits; | |
604 | tformat->rsvd_bits = ddp->idx_bits; | |
605 | tformat->rsvd_shift = PPOD_IDX_SHIFT; | |
606 | tformat->rsvd_mask = (1 << tformat->rsvd_bits) - 1; | |
607 | ||
608 | ddp_log_info("tag format: sw %u, rsvd %u,%u, mask 0x%x.\n", | |
609 | tformat->sw_bits, tformat->rsvd_bits, | |
610 | tformat->rsvd_shift, tformat->rsvd_mask); | |
611 | ||
612 | *txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
613 | ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
614 | *rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, | |
615 | ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); | |
616 | ddp_log_info("max payload size: %u/%u, %u/%u.\n", | |
617 | *txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz); | |
618 | return 0; | |
619 | } | |
9fa1926a KX |
620 | |
621 | /** | |
5b2639d5 | 622 | * cxgb3i_ddp_cleanup - release the cxgb3 adapter's ddp resource |
9fa1926a KX |
623 | * @tdev: t3cdev adapter |
624 | * release all the resource held by the ddp pagepod manager for a given | |
625 | * adapter if needed | |
626 | */ | |
295ab1b5 KX |
627 | |
628 | static void ddp_cleanup(struct kref *kref) | |
9fa1926a | 629 | { |
295ab1b5 KX |
630 | struct cxgb3i_ddp_info *ddp = container_of(kref, |
631 | struct cxgb3i_ddp_info, | |
632 | refcnt); | |
9fa1926a | 633 | int i = 0; |
295ab1b5 KX |
634 | |
635 | ddp_log_info("kref release ddp 0x%p, t3dev 0x%p.\n", ddp, ddp->tdev); | |
636 | ||
637 | ddp->tdev->ulp_iscsi = NULL; | |
638 | while (i < ddp->nppods) { | |
639 | struct cxgb3i_gather_list *gl = ddp->gl_map[i]; | |
640 | if (gl) { | |
641 | int npods = (gl->nelem + PPOD_PAGES_MAX - 1) | |
642 | >> PPOD_PAGES_SHIFT; | |
643 | ddp_log_info("t3dev 0x%p, ddp %d + %d.\n", | |
644 | ddp->tdev, i, npods); | |
645 | kfree(gl); | |
646 | ddp_free_gl_skb(ddp, i, npods); | |
647 | i += npods; | |
648 | } else | |
649 | i++; | |
650 | } | |
651 | cxgb3i_free_big_mem(ddp); | |
652 | } | |
653 | ||
654 | void cxgb3i_ddp_cleanup(struct t3cdev *tdev) | |
655 | { | |
9fa1926a KX |
656 | struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; |
657 | ||
658 | ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp); | |
295ab1b5 KX |
659 | if (ddp) |
660 | kref_put(&ddp->refcnt, ddp_cleanup); | |
9fa1926a KX |
661 | } |
662 | ||
663 | /** | |
664 | * ddp_init - initialize the cxgb3 adapter's ddp resource | |
665 | * @tdev: t3cdev adapter | |
666 | * initialize the ddp pagepod manager for a given adapter | |
667 | */ | |
668 | static void ddp_init(struct t3cdev *tdev) | |
c3673464 | 669 | { |
295ab1b5 | 670 | struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; |
c3673464 KX |
671 | struct ulp_iscsi_info uinfo; |
672 | unsigned int ppmax, bits; | |
673 | int i, err; | |
c3673464 | 674 | |
295ab1b5 KX |
675 | if (ddp) { |
676 | kref_get(&ddp->refcnt); | |
9fa1926a KX |
677 | ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n", |
678 | tdev, tdev->ulp_iscsi); | |
679 | return; | |
680 | } | |
681 | ||
c3673464 KX |
682 | err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); |
683 | if (err < 0) { | |
684 | ddp_log_error("%s, failed to get iscsi param err=%d.\n", | |
685 | tdev->name, err); | |
9fa1926a | 686 | return; |
c3673464 KX |
687 | } |
688 | ||
689 | ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT; | |
690 | bits = __ilog2_u32(ppmax) + 1; | |
691 | if (bits > PPOD_IDX_MAX_SIZE) | |
692 | bits = PPOD_IDX_MAX_SIZE; | |
693 | ppmax = (1 << (bits - 1)) - 1; | |
694 | ||
695 | ddp = cxgb3i_alloc_big_mem(sizeof(struct cxgb3i_ddp_info) + | |
696 | ppmax * | |
697 | (sizeof(struct cxgb3i_gather_list *) + | |
698 | sizeof(struct sk_buff *)), | |
699 | GFP_KERNEL); | |
700 | if (!ddp) { | |
701 | ddp_log_warn("%s unable to alloc ddp 0x%d, ddp disabled.\n", | |
702 | tdev->name, ppmax); | |
9fa1926a | 703 | return; |
c3673464 KX |
704 | } |
705 | ddp->gl_map = (struct cxgb3i_gather_list **)(ddp + 1); | |
706 | ddp->gl_skb = (struct sk_buff **)(((char *)ddp->gl_map) + | |
707 | ppmax * | |
708 | sizeof(struct cxgb3i_gather_list *)); | |
709 | spin_lock_init(&ddp->map_lock); | |
295ab1b5 | 710 | kref_init(&ddp->refcnt); |
c3673464 KX |
711 | |
712 | ddp->tdev = tdev; | |
713 | ddp->pdev = uinfo.pdev; | |
714 | ddp->max_txsz = min_t(unsigned int, uinfo.max_txsz, ULP2_MAX_PKT_SIZE); | |
715 | ddp->max_rxsz = min_t(unsigned int, uinfo.max_rxsz, ULP2_MAX_PKT_SIZE); | |
716 | ddp->llimit = uinfo.llimit; | |
717 | ddp->ulimit = uinfo.ulimit; | |
718 | ddp->nppods = ppmax; | |
719 | ddp->idx_last = ppmax; | |
720 | ddp->idx_bits = bits; | |
721 | ddp->idx_mask = (1 << bits) - 1; | |
722 | ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1; | |
723 | ||
724 | uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; | |
725 | for (i = 0; i < DDP_PGIDX_MAX; i++) | |
726 | uinfo.pgsz_factor[i] = ddp_page_order[i]; | |
727 | uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT); | |
728 | ||
729 | err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); | |
730 | if (err < 0) { | |
731 | ddp_log_warn("%s unable to set iscsi param err=%d, " | |
732 | "ddp disabled.\n", tdev->name, err); | |
733 | goto free_ddp_map; | |
734 | } | |
735 | ||
736 | tdev->ulp_iscsi = ddp; | |
737 | ||
9fa1926a KX |
738 | ddp_log_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u," |
739 | " %u/%u.\n", | |
740 | tdev, ppmax, ddp->idx_bits, ddp->idx_mask, | |
741 | ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, | |
f62d0896 | 742 | ddp->max_rxsz, uinfo.max_rxsz); |
9fa1926a | 743 | return; |
c3673464 KX |
744 | |
745 | free_ddp_map: | |
746 | cxgb3i_free_big_mem(ddp); | |
c3673464 KX |
747 | } |
748 | ||
c3673464 | 749 | /** |
0d0c27f2 | 750 | * cxgb3i_ddp_init - initialize ddp functions |
c3673464 | 751 | */ |
0d0c27f2 | 752 | void cxgb3i_ddp_init(struct t3cdev *tdev) |
c3673464 | 753 | { |
0d0c27f2 KX |
754 | if (page_idx == DDP_PGIDX_MAX) { |
755 | page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE); | |
9194c626 KX |
756 | |
757 | if (page_idx == DDP_PGIDX_MAX) { | |
758 | ddp_log_info("system PAGE_SIZE %lu, update hw.\n", | |
759 | PAGE_SIZE); | |
760 | if (cxgb3i_ddp_adjust_page_table() < 0) { | |
761 | ddp_log_info("PAGE_SIZE %lu, ddp disabled.\n", | |
762 | PAGE_SIZE); | |
763 | return; | |
764 | } | |
765 | page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE); | |
766 | } | |
0d0c27f2 KX |
767 | ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n", |
768 | PAGE_SIZE, page_idx); | |
769 | } | |
770 | ddp_init(tdev); | |
c3673464 | 771 | } |