xref: /openbmc/linux/drivers/infiniband/hw/cxgb4/mem.c (revision a5c29a26)
1 /*
2  * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32 
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <rdma/ib_umem.h>
36 #include <linux/atomic.h>
37 #include <rdma/ib_user_verbs.h>
38 
39 #include "iw_cxgb4.h"
40 
41 int use_dsgl = 1;
42 module_param(use_dsgl, int, 0644);
43 MODULE_PARM_DESC(use_dsgl, "Use DSGL for PBL/FastReg (default=1) (DEPRECATED)");
44 
45 #define T4_ULPTX_MIN_IO 32
46 #define C4IW_MAX_INLINE_SIZE 96
47 #define T4_ULPTX_MAX_DMA 1024
48 #define C4IW_INLINE_THRESHOLD 128
49 
50 static int inline_threshold = C4IW_INLINE_THRESHOLD;
51 module_param(inline_threshold, int, 0644);
52 MODULE_PARM_DESC(inline_threshold, "inline vs dsgl threshold (default=128)");
53 
mr_exceeds_hw_limits(struct c4iw_dev * dev,u64 length)54 static int mr_exceeds_hw_limits(struct c4iw_dev *dev, u64 length)
55 {
56 	return (is_t4(dev->rdev.lldi.adapter_type) ||
57 		is_t5(dev->rdev.lldi.adapter_type)) &&
58 		length >= 8*1024*1024*1024ULL;
59 }
60 
_c4iw_write_mem_dma_aligned(struct c4iw_rdev * rdev,u32 addr,u32 len,dma_addr_t data,struct sk_buff * skb,struct c4iw_wr_wait * wr_waitp)61 static int _c4iw_write_mem_dma_aligned(struct c4iw_rdev *rdev, u32 addr,
62 				       u32 len, dma_addr_t data,
63 				       struct sk_buff *skb,
64 				       struct c4iw_wr_wait *wr_waitp)
65 {
66 	struct ulp_mem_io *req;
67 	struct ulptx_sgl *sgl;
68 	u8 wr_len;
69 	int ret = 0;
70 
71 	addr &= 0x7FFFFFF;
72 
73 	if (wr_waitp)
74 		c4iw_init_wr_wait(wr_waitp);
75 	wr_len = roundup(sizeof(*req) + sizeof(*sgl), 16);
76 
77 	if (!skb) {
78 		skb = alloc_skb(wr_len, GFP_KERNEL | __GFP_NOFAIL);
79 		if (!skb)
80 			return -ENOMEM;
81 	}
82 	set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
83 
84 	req = __skb_put_zero(skb, wr_len);
85 	INIT_ULPTX_WR(req, wr_len, 0, 0);
86 	req->wr.wr_hi = cpu_to_be32(FW_WR_OP_V(FW_ULPTX_WR) |
87 			(wr_waitp ? FW_WR_COMPL_F : 0));
88 	req->wr.wr_lo = wr_waitp ? (__force __be64)(unsigned long)wr_waitp : 0L;
89 	req->wr.wr_mid = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(wr_len, 16)));
90 	req->cmd = cpu_to_be32(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
91 			       T5_ULP_MEMIO_ORDER_V(1) |
92 			       T5_ULP_MEMIO_FID_V(rdev->lldi.rxq_ids[0]));
93 	req->dlen = cpu_to_be32(ULP_MEMIO_DATA_LEN_V(len>>5));
94 	req->len16 = cpu_to_be32(DIV_ROUND_UP(wr_len-sizeof(req->wr), 16));
95 	req->lock_addr = cpu_to_be32(ULP_MEMIO_ADDR_V(addr));
96 
97 	sgl = (struct ulptx_sgl *)(req + 1);
98 	sgl->cmd_nsge = cpu_to_be32(ULPTX_CMD_V(ULP_TX_SC_DSGL) |
99 				    ULPTX_NSGE_V(1));
100 	sgl->len0 = cpu_to_be32(len);
101 	sgl->addr0 = cpu_to_be64(data);
102 
103 	if (wr_waitp)
104 		ret = c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, 0, __func__);
105 	else
106 		ret = c4iw_ofld_send(rdev, skb);
107 	return ret;
108 }
109 
_c4iw_write_mem_inline(struct c4iw_rdev * rdev,u32 addr,u32 len,void * data,struct sk_buff * skb,struct c4iw_wr_wait * wr_waitp)110 static int _c4iw_write_mem_inline(struct c4iw_rdev *rdev, u32 addr, u32 len,
111 				  void *data, struct sk_buff *skb,
112 				  struct c4iw_wr_wait *wr_waitp)
113 {
114 	struct ulp_mem_io *req;
115 	struct ulptx_idata *sc;
116 	u8 wr_len, *to_dp, *from_dp;
117 	int copy_len, num_wqe, i, ret = 0;
118 	__be32 cmd = cpu_to_be32(ULPTX_CMD_V(ULP_TX_MEM_WRITE));
119 
120 	if (is_t4(rdev->lldi.adapter_type))
121 		cmd |= cpu_to_be32(ULP_MEMIO_ORDER_F);
122 	else
123 		cmd |= cpu_to_be32(T5_ULP_MEMIO_IMM_F);
124 
125 	addr &= 0x7FFFFFF;
126 	pr_debug("addr 0x%x len %u\n", addr, len);
127 	num_wqe = DIV_ROUND_UP(len, C4IW_MAX_INLINE_SIZE);
128 	c4iw_init_wr_wait(wr_waitp);
129 	for (i = 0; i < num_wqe; i++) {
130 
131 		copy_len = len > C4IW_MAX_INLINE_SIZE ? C4IW_MAX_INLINE_SIZE :
132 			   len;
133 		wr_len = roundup(sizeof(*req) + sizeof(*sc) +
134 					 roundup(copy_len, T4_ULPTX_MIN_IO),
135 				 16);
136 
137 		if (!skb) {
138 			skb = alloc_skb(wr_len, GFP_KERNEL | __GFP_NOFAIL);
139 			if (!skb)
140 				return -ENOMEM;
141 		}
142 		set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
143 
144 		req = __skb_put_zero(skb, wr_len);
145 		INIT_ULPTX_WR(req, wr_len, 0, 0);
146 
147 		if (i == (num_wqe-1)) {
148 			req->wr.wr_hi = cpu_to_be32(FW_WR_OP_V(FW_ULPTX_WR) |
149 						    FW_WR_COMPL_F);
150 			req->wr.wr_lo = (__force __be64)(unsigned long)wr_waitp;
151 		} else
152 			req->wr.wr_hi = cpu_to_be32(FW_WR_OP_V(FW_ULPTX_WR));
153 		req->wr.wr_mid = cpu_to_be32(
154 				       FW_WR_LEN16_V(DIV_ROUND_UP(wr_len, 16)));
155 
156 		req->cmd = cmd;
157 		req->dlen = cpu_to_be32(ULP_MEMIO_DATA_LEN_V(
158 				DIV_ROUND_UP(copy_len, T4_ULPTX_MIN_IO)));
159 		req->len16 = cpu_to_be32(DIV_ROUND_UP(wr_len-sizeof(req->wr),
160 						      16));
161 		req->lock_addr = cpu_to_be32(ULP_MEMIO_ADDR_V(addr + i * 3));
162 
163 		sc = (struct ulptx_idata *)(req + 1);
164 		sc->cmd_more = cpu_to_be32(ULPTX_CMD_V(ULP_TX_SC_IMM));
165 		sc->len = cpu_to_be32(roundup(copy_len, T4_ULPTX_MIN_IO));
166 
167 		to_dp = (u8 *)(sc + 1);
168 		from_dp = (u8 *)data + i * C4IW_MAX_INLINE_SIZE;
169 		if (data)
170 			memcpy(to_dp, from_dp, copy_len);
171 		else
172 			memset(to_dp, 0, copy_len);
173 		if (copy_len % T4_ULPTX_MIN_IO)
174 			memset(to_dp + copy_len, 0, T4_ULPTX_MIN_IO -
175 			       (copy_len % T4_ULPTX_MIN_IO));
176 		if (i == (num_wqe-1))
177 			ret = c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, 0,
178 						 __func__);
179 		else
180 			ret = c4iw_ofld_send(rdev, skb);
181 		if (ret)
182 			break;
183 		skb = NULL;
184 		len -= C4IW_MAX_INLINE_SIZE;
185 	}
186 
187 	return ret;
188 }
189 
_c4iw_write_mem_dma(struct c4iw_rdev * rdev,u32 addr,u32 len,void * data,struct sk_buff * skb,struct c4iw_wr_wait * wr_waitp)190 static int _c4iw_write_mem_dma(struct c4iw_rdev *rdev, u32 addr, u32 len,
191 			       void *data, struct sk_buff *skb,
192 			       struct c4iw_wr_wait *wr_waitp)
193 {
194 	u32 remain = len;
195 	u32 dmalen;
196 	int ret = 0;
197 	dma_addr_t daddr;
198 	dma_addr_t save;
199 
200 	daddr = dma_map_single(&rdev->lldi.pdev->dev, data, len, DMA_TO_DEVICE);
201 	if (dma_mapping_error(&rdev->lldi.pdev->dev, daddr))
202 		return -1;
203 	save = daddr;
204 
205 	while (remain > inline_threshold) {
206 		if (remain < T4_ULPTX_MAX_DMA) {
207 			if (remain & ~T4_ULPTX_MIN_IO)
208 				dmalen = remain & ~(T4_ULPTX_MIN_IO-1);
209 			else
210 				dmalen = remain;
211 		} else
212 			dmalen = T4_ULPTX_MAX_DMA;
213 		remain -= dmalen;
214 		ret = _c4iw_write_mem_dma_aligned(rdev, addr, dmalen, daddr,
215 						 skb, remain ? NULL : wr_waitp);
216 		if (ret)
217 			goto out;
218 		addr += dmalen >> 5;
219 		data += dmalen;
220 		daddr += dmalen;
221 	}
222 	if (remain)
223 		ret = _c4iw_write_mem_inline(rdev, addr, remain, data, skb,
224 					     wr_waitp);
225 out:
226 	dma_unmap_single(&rdev->lldi.pdev->dev, save, len, DMA_TO_DEVICE);
227 	return ret;
228 }
229 
230 /*
231  * write len bytes of data into addr (32B aligned address)
232  * If data is NULL, clear len byte of memory to zero.
233  */
write_adapter_mem(struct c4iw_rdev * rdev,u32 addr,u32 len,void * data,struct sk_buff * skb,struct c4iw_wr_wait * wr_waitp)234 static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len,
235 			     void *data, struct sk_buff *skb,
236 			     struct c4iw_wr_wait *wr_waitp)
237 {
238 	int ret;
239 
240 	if (!rdev->lldi.ulptx_memwrite_dsgl || !use_dsgl) {
241 		ret = _c4iw_write_mem_inline(rdev, addr, len, data, skb,
242 					      wr_waitp);
243 		goto out;
244 	}
245 
246 	if (len <= inline_threshold) {
247 		ret = _c4iw_write_mem_inline(rdev, addr, len, data, skb,
248 					      wr_waitp);
249 		goto out;
250 	}
251 
252 	ret = _c4iw_write_mem_dma(rdev, addr, len, data, skb, wr_waitp);
253 	if (ret) {
254 		pr_warn_ratelimited("%s: dma map failure (non fatal)\n",
255 				    pci_name(rdev->lldi.pdev));
256 		ret = _c4iw_write_mem_inline(rdev, addr, len, data, skb,
257 					      wr_waitp);
258 	}
259 out:
260 	return ret;
261 
262 }
263 
264 /*
265  * Build and write a TPT entry.
266  * IN: stag key, pdid, perm, bind_enabled, zbva, to, len, page_size,
267  *     pbl_size and pbl_addr
268  * OUT: stag index
269  */
write_tpt_entry(struct c4iw_rdev * rdev,u32 reset_tpt_entry,u32 * stag,u8 stag_state,u32 pdid,enum fw_ri_stag_type type,enum fw_ri_mem_perms perm,int bind_enabled,u32 zbva,u64 to,u64 len,u8 page_size,u32 pbl_size,u32 pbl_addr,struct sk_buff * skb,struct c4iw_wr_wait * wr_waitp)270 static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry,
271 			   u32 *stag, u8 stag_state, u32 pdid,
272 			   enum fw_ri_stag_type type, enum fw_ri_mem_perms perm,
273 			   int bind_enabled, u32 zbva, u64 to,
274 			   u64 len, u8 page_size, u32 pbl_size, u32 pbl_addr,
275 			   struct sk_buff *skb, struct c4iw_wr_wait *wr_waitp)
276 {
277 	int err;
278 	struct fw_ri_tpte *tpt;
279 	u32 stag_idx;
280 	static atomic_t key;
281 
282 	if (c4iw_fatal_error(rdev))
283 		return -EIO;
284 
285 	tpt = kmalloc(sizeof(*tpt), GFP_KERNEL);
286 	if (!tpt)
287 		return -ENOMEM;
288 
289 	stag_state = stag_state > 0;
290 	stag_idx = (*stag) >> 8;
291 
292 	if ((!reset_tpt_entry) && (*stag == T4_STAG_UNSET)) {
293 		stag_idx = c4iw_get_resource(&rdev->resource.tpt_table);
294 		if (!stag_idx) {
295 			mutex_lock(&rdev->stats.lock);
296 			rdev->stats.stag.fail++;
297 			mutex_unlock(&rdev->stats.lock);
298 			kfree(tpt);
299 			return -ENOMEM;
300 		}
301 		mutex_lock(&rdev->stats.lock);
302 		rdev->stats.stag.cur += 32;
303 		if (rdev->stats.stag.cur > rdev->stats.stag.max)
304 			rdev->stats.stag.max = rdev->stats.stag.cur;
305 		mutex_unlock(&rdev->stats.lock);
306 		*stag = (stag_idx << 8) | (atomic_inc_return(&key) & 0xff);
307 	}
308 	pr_debug("stag_state 0x%0x type 0x%0x pdid 0x%0x, stag_idx 0x%x\n",
309 		 stag_state, type, pdid, stag_idx);
310 
311 	/* write TPT entry */
312 	if (reset_tpt_entry)
313 		memset(tpt, 0, sizeof(*tpt));
314 	else {
315 		tpt->valid_to_pdid = cpu_to_be32(FW_RI_TPTE_VALID_F |
316 			FW_RI_TPTE_STAGKEY_V((*stag & FW_RI_TPTE_STAGKEY_M)) |
317 			FW_RI_TPTE_STAGSTATE_V(stag_state) |
318 			FW_RI_TPTE_STAGTYPE_V(type) | FW_RI_TPTE_PDID_V(pdid));
319 		tpt->locread_to_qpid = cpu_to_be32(FW_RI_TPTE_PERM_V(perm) |
320 			(bind_enabled ? FW_RI_TPTE_MWBINDEN_F : 0) |
321 			FW_RI_TPTE_ADDRTYPE_V((zbva ? FW_RI_ZERO_BASED_TO :
322 						      FW_RI_VA_BASED_TO))|
323 			FW_RI_TPTE_PS_V(page_size));
324 		tpt->nosnoop_pbladdr = !pbl_size ? 0 : cpu_to_be32(
325 			FW_RI_TPTE_PBLADDR_V(PBL_OFF(rdev, pbl_addr)>>3));
326 		tpt->len_lo = cpu_to_be32((u32)(len & 0xffffffffUL));
327 		tpt->va_hi = cpu_to_be32((u32)(to >> 32));
328 		tpt->va_lo_fbo = cpu_to_be32((u32)(to & 0xffffffffUL));
329 		tpt->dca_mwbcnt_pstag = cpu_to_be32(0);
330 		tpt->len_hi = cpu_to_be32((u32)(len >> 32));
331 	}
332 	err = write_adapter_mem(rdev, stag_idx +
333 				(rdev->lldi.vr->stag.start >> 5),
334 				sizeof(*tpt), tpt, skb, wr_waitp);
335 
336 	if (reset_tpt_entry) {
337 		c4iw_put_resource(&rdev->resource.tpt_table, stag_idx);
338 		mutex_lock(&rdev->stats.lock);
339 		rdev->stats.stag.cur -= 32;
340 		mutex_unlock(&rdev->stats.lock);
341 	}
342 	kfree(tpt);
343 	return err;
344 }
345 
write_pbl(struct c4iw_rdev * rdev,__be64 * pbl,u32 pbl_addr,u32 pbl_size,struct c4iw_wr_wait * wr_waitp)346 static int write_pbl(struct c4iw_rdev *rdev, __be64 *pbl,
347 		     u32 pbl_addr, u32 pbl_size, struct c4iw_wr_wait *wr_waitp)
348 {
349 	int err;
350 
351 	pr_debug("*pdb_addr 0x%x, pbl_base 0x%x, pbl_size %d\n",
352 		 pbl_addr, rdev->lldi.vr->pbl.start,
353 		 pbl_size);
354 
355 	err = write_adapter_mem(rdev, pbl_addr >> 5, pbl_size << 3, pbl, NULL,
356 				wr_waitp);
357 	return err;
358 }
359 
dereg_mem(struct c4iw_rdev * rdev,u32 stag,u32 pbl_size,u32 pbl_addr,struct sk_buff * skb,struct c4iw_wr_wait * wr_waitp)360 static int dereg_mem(struct c4iw_rdev *rdev, u32 stag, u32 pbl_size,
361 		     u32 pbl_addr, struct sk_buff *skb,
362 		     struct c4iw_wr_wait *wr_waitp)
363 {
364 	return write_tpt_entry(rdev, 1, &stag, 0, 0, 0, 0, 0, 0, 0UL, 0, 0,
365 			       pbl_size, pbl_addr, skb, wr_waitp);
366 }
367 
allocate_stag(struct c4iw_rdev * rdev,u32 * stag,u32 pdid,u32 pbl_size,u32 pbl_addr,struct c4iw_wr_wait * wr_waitp)368 static int allocate_stag(struct c4iw_rdev *rdev, u32 *stag, u32 pdid,
369 			 u32 pbl_size, u32 pbl_addr,
370 			 struct c4iw_wr_wait *wr_waitp)
371 {
372 	*stag = T4_STAG_UNSET;
373 	return write_tpt_entry(rdev, 0, stag, 0, pdid, FW_RI_STAG_NSMR, 0, 0, 0,
374 			       0UL, 0, 0, pbl_size, pbl_addr, NULL, wr_waitp);
375 }
376 
finish_mem_reg(struct c4iw_mr * mhp,u32 stag)377 static int finish_mem_reg(struct c4iw_mr *mhp, u32 stag)
378 {
379 	u32 mmid;
380 
381 	mhp->attr.state = 1;
382 	mhp->attr.stag = stag;
383 	mmid = stag >> 8;
384 	mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
385 	mhp->ibmr.length = mhp->attr.len;
386 	mhp->ibmr.page_size = 1U << (mhp->attr.page_size + 12);
387 	pr_debug("mmid 0x%x mhp %p\n", mmid, mhp);
388 	return xa_insert_irq(&mhp->rhp->mrs, mmid, mhp, GFP_KERNEL);
389 }
390 
register_mem(struct c4iw_dev * rhp,struct c4iw_pd * php,struct c4iw_mr * mhp,int shift)391 static int register_mem(struct c4iw_dev *rhp, struct c4iw_pd *php,
392 		      struct c4iw_mr *mhp, int shift)
393 {
394 	u32 stag = T4_STAG_UNSET;
395 	int ret;
396 
397 	ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, mhp->attr.pdid,
398 			      FW_RI_STAG_NSMR, mhp->attr.len ?
399 			      mhp->attr.perms : 0,
400 			      mhp->attr.mw_bind_enable, mhp->attr.zbva,
401 			      mhp->attr.va_fbo, mhp->attr.len ?
402 			      mhp->attr.len : -1, shift - 12,
403 			      mhp->attr.pbl_size, mhp->attr.pbl_addr, NULL,
404 			      mhp->wr_waitp);
405 	if (ret)
406 		return ret;
407 
408 	ret = finish_mem_reg(mhp, stag);
409 	if (ret) {
410 		dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
411 			  mhp->attr.pbl_addr, mhp->dereg_skb, mhp->wr_waitp);
412 		mhp->dereg_skb = NULL;
413 	}
414 	return ret;
415 }
416 
alloc_pbl(struct c4iw_mr * mhp,int npages)417 static int alloc_pbl(struct c4iw_mr *mhp, int npages)
418 {
419 	mhp->attr.pbl_addr = c4iw_pblpool_alloc(&mhp->rhp->rdev,
420 						    npages << 3);
421 
422 	if (!mhp->attr.pbl_addr)
423 		return -ENOMEM;
424 
425 	mhp->attr.pbl_size = npages;
426 
427 	return 0;
428 }
429 
c4iw_get_dma_mr(struct ib_pd * pd,int acc)430 struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc)
431 {
432 	struct c4iw_dev *rhp;
433 	struct c4iw_pd *php;
434 	struct c4iw_mr *mhp;
435 	int ret;
436 	u32 stag = T4_STAG_UNSET;
437 
438 	pr_debug("ib_pd %p\n", pd);
439 	php = to_c4iw_pd(pd);
440 	rhp = php->rhp;
441 
442 	mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
443 	if (!mhp)
444 		return ERR_PTR(-ENOMEM);
445 	mhp->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL);
446 	if (!mhp->wr_waitp) {
447 		ret = -ENOMEM;
448 		goto err_free_mhp;
449 	}
450 	c4iw_init_wr_wait(mhp->wr_waitp);
451 
452 	mhp->dereg_skb = alloc_skb(SGE_MAX_WR_LEN, GFP_KERNEL);
453 	if (!mhp->dereg_skb) {
454 		ret = -ENOMEM;
455 		goto err_free_wr_wait;
456 	}
457 
458 	mhp->rhp = rhp;
459 	mhp->attr.pdid = php->pdid;
460 	mhp->attr.perms = c4iw_ib_to_tpt_access(acc);
461 	mhp->attr.mw_bind_enable = (acc&IB_ACCESS_MW_BIND) == IB_ACCESS_MW_BIND;
462 	mhp->attr.zbva = 0;
463 	mhp->attr.va_fbo = 0;
464 	mhp->attr.page_size = 0;
465 	mhp->attr.len = ~0ULL;
466 	mhp->attr.pbl_size = 0;
467 
468 	ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, php->pdid,
469 			      FW_RI_STAG_NSMR, mhp->attr.perms,
470 			      mhp->attr.mw_bind_enable, 0, 0, ~0ULL, 0, 0, 0,
471 			      NULL, mhp->wr_waitp);
472 	if (ret)
473 		goto err_free_skb;
474 
475 	ret = finish_mem_reg(mhp, stag);
476 	if (ret)
477 		goto err_dereg_mem;
478 	return &mhp->ibmr;
479 err_dereg_mem:
480 	dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
481 		  mhp->attr.pbl_addr, mhp->dereg_skb, mhp->wr_waitp);
482 err_free_skb:
483 	kfree_skb(mhp->dereg_skb);
484 err_free_wr_wait:
485 	c4iw_put_wr_wait(mhp->wr_waitp);
486 err_free_mhp:
487 	kfree(mhp);
488 	return ERR_PTR(ret);
489 }
490 
c4iw_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int acc,struct ib_udata * udata)491 struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
492 			       u64 virt, int acc, struct ib_udata *udata)
493 {
494 	__be64 *pages;
495 	int shift, n, i;
496 	int err = -ENOMEM;
497 	struct ib_block_iter biter;
498 	struct c4iw_dev *rhp;
499 	struct c4iw_pd *php;
500 	struct c4iw_mr *mhp;
501 
502 	pr_debug("ib_pd %p\n", pd);
503 
504 	if (length == ~0ULL)
505 		return ERR_PTR(-EINVAL);
506 
507 	if ((length + start) < start)
508 		return ERR_PTR(-EINVAL);
509 
510 	php = to_c4iw_pd(pd);
511 	rhp = php->rhp;
512 
513 	if (mr_exceeds_hw_limits(rhp, length))
514 		return ERR_PTR(-EINVAL);
515 
516 	mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
517 	if (!mhp)
518 		return ERR_PTR(-ENOMEM);
519 	mhp->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL);
520 	if (!mhp->wr_waitp)
521 		goto err_free_mhp;
522 
523 	mhp->dereg_skb = alloc_skb(SGE_MAX_WR_LEN, GFP_KERNEL);
524 	if (!mhp->dereg_skb)
525 		goto err_free_wr_wait;
526 
527 	mhp->rhp = rhp;
528 
529 	mhp->umem = ib_umem_get(pd->device, start, length, acc);
530 	if (IS_ERR(mhp->umem))
531 		goto err_free_skb;
532 
533 	shift = PAGE_SHIFT;
534 
535 	n = ib_umem_num_dma_blocks(mhp->umem, 1 << shift);
536 	err = alloc_pbl(mhp, n);
537 	if (err)
538 		goto err_umem_release;
539 
540 	pages = (__be64 *) __get_free_page(GFP_KERNEL);
541 	if (!pages) {
542 		err = -ENOMEM;
543 		goto err_pbl_free;
544 	}
545 
546 	i = n = 0;
547 
548 	rdma_umem_for_each_dma_block(mhp->umem, &biter, 1 << shift) {
549 		pages[i++] = cpu_to_be64(rdma_block_iter_dma_address(&biter));
550 		if (i == PAGE_SIZE / sizeof(*pages)) {
551 			err = write_pbl(&mhp->rhp->rdev, pages,
552 					mhp->attr.pbl_addr + (n << 3), i,
553 					mhp->wr_waitp);
554 			if (err)
555 				goto pbl_done;
556 			n += i;
557 			i = 0;
558 		}
559 	}
560 
561 	if (i)
562 		err = write_pbl(&mhp->rhp->rdev, pages,
563 				mhp->attr.pbl_addr + (n << 3), i,
564 				mhp->wr_waitp);
565 
566 pbl_done:
567 	free_page((unsigned long) pages);
568 	if (err)
569 		goto err_pbl_free;
570 
571 	mhp->attr.pdid = php->pdid;
572 	mhp->attr.zbva = 0;
573 	mhp->attr.perms = c4iw_ib_to_tpt_access(acc);
574 	mhp->attr.va_fbo = virt;
575 	mhp->attr.page_size = shift - 12;
576 	mhp->attr.len = length;
577 
578 	err = register_mem(rhp, php, mhp, shift);
579 	if (err)
580 		goto err_pbl_free;
581 
582 	return &mhp->ibmr;
583 
584 err_pbl_free:
585 	c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
586 			      mhp->attr.pbl_size << 3);
587 err_umem_release:
588 	ib_umem_release(mhp->umem);
589 err_free_skb:
590 	kfree_skb(mhp->dereg_skb);
591 err_free_wr_wait:
592 	c4iw_put_wr_wait(mhp->wr_waitp);
593 err_free_mhp:
594 	kfree(mhp);
595 	return ERR_PTR(err);
596 }
597 
c4iw_alloc_mr(struct ib_pd * pd,enum ib_mr_type mr_type,u32 max_num_sg)598 struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
599 			    u32 max_num_sg)
600 {
601 	struct c4iw_dev *rhp;
602 	struct c4iw_pd *php;
603 	struct c4iw_mr *mhp;
604 	u32 mmid;
605 	u32 stag = 0;
606 	int ret = 0;
607 	int length = roundup(max_num_sg * sizeof(u64), 32);
608 
609 	php = to_c4iw_pd(pd);
610 	rhp = php->rhp;
611 
612 	if (mr_type != IB_MR_TYPE_MEM_REG ||
613 	    max_num_sg > t4_max_fr_depth(rhp->rdev.lldi.ulptx_memwrite_dsgl &&
614 					 use_dsgl))
615 		return ERR_PTR(-EINVAL);
616 
617 	mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
618 	if (!mhp) {
619 		ret = -ENOMEM;
620 		goto err;
621 	}
622 
623 	mhp->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL);
624 	if (!mhp->wr_waitp) {
625 		ret = -ENOMEM;
626 		goto err_free_mhp;
627 	}
628 	c4iw_init_wr_wait(mhp->wr_waitp);
629 
630 	mhp->mpl = dma_alloc_coherent(&rhp->rdev.lldi.pdev->dev,
631 				      length, &mhp->mpl_addr, GFP_KERNEL);
632 	if (!mhp->mpl) {
633 		ret = -ENOMEM;
634 		goto err_free_wr_wait;
635 	}
636 	mhp->max_mpl_len = length;
637 
638 	mhp->rhp = rhp;
639 	ret = alloc_pbl(mhp, max_num_sg);
640 	if (ret)
641 		goto err_free_dma;
642 	mhp->attr.pbl_size = max_num_sg;
643 	ret = allocate_stag(&rhp->rdev, &stag, php->pdid,
644 			    mhp->attr.pbl_size, mhp->attr.pbl_addr,
645 			    mhp->wr_waitp);
646 	if (ret)
647 		goto err_free_pbl;
648 	mhp->attr.pdid = php->pdid;
649 	mhp->attr.type = FW_RI_STAG_NSMR;
650 	mhp->attr.stag = stag;
651 	mhp->attr.state = 0;
652 	mmid = (stag) >> 8;
653 	mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
654 	if (xa_insert_irq(&rhp->mrs, mmid, mhp, GFP_KERNEL)) {
655 		ret = -ENOMEM;
656 		goto err_dereg;
657 	}
658 
659 	pr_debug("mmid 0x%x mhp %p stag 0x%x\n", mmid, mhp, stag);
660 	return &(mhp->ibmr);
661 err_dereg:
662 	dereg_mem(&rhp->rdev, stag, mhp->attr.pbl_size,
663 		  mhp->attr.pbl_addr, mhp->dereg_skb, mhp->wr_waitp);
664 err_free_pbl:
665 	c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
666 			      mhp->attr.pbl_size << 3);
667 err_free_dma:
668 	dma_free_coherent(&mhp->rhp->rdev.lldi.pdev->dev,
669 			  mhp->max_mpl_len, mhp->mpl, mhp->mpl_addr);
670 err_free_wr_wait:
671 	c4iw_put_wr_wait(mhp->wr_waitp);
672 err_free_mhp:
673 	kfree(mhp);
674 err:
675 	return ERR_PTR(ret);
676 }
677 
c4iw_set_page(struct ib_mr * ibmr,u64 addr)678 static int c4iw_set_page(struct ib_mr *ibmr, u64 addr)
679 {
680 	struct c4iw_mr *mhp = to_c4iw_mr(ibmr);
681 
682 	if (unlikely(mhp->mpl_len == mhp->attr.pbl_size))
683 		return -ENOMEM;
684 
685 	mhp->mpl[mhp->mpl_len++] = addr;
686 
687 	return 0;
688 }
689 
c4iw_map_mr_sg(struct ib_mr * ibmr,struct scatterlist * sg,int sg_nents,unsigned int * sg_offset)690 int c4iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
691 		   unsigned int *sg_offset)
692 {
693 	struct c4iw_mr *mhp = to_c4iw_mr(ibmr);
694 
695 	mhp->mpl_len = 0;
696 
697 	return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, c4iw_set_page);
698 }
699 
c4iw_dereg_mr(struct ib_mr * ib_mr,struct ib_udata * udata)700 int c4iw_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata)
701 {
702 	struct c4iw_dev *rhp;
703 	struct c4iw_mr *mhp;
704 	u32 mmid;
705 
706 	pr_debug("ib_mr %p\n", ib_mr);
707 
708 	mhp = to_c4iw_mr(ib_mr);
709 	rhp = mhp->rhp;
710 	mmid = mhp->attr.stag >> 8;
711 	xa_erase_irq(&rhp->mrs, mmid);
712 	if (mhp->mpl)
713 		dma_free_coherent(&mhp->rhp->rdev.lldi.pdev->dev,
714 				  mhp->max_mpl_len, mhp->mpl, mhp->mpl_addr);
715 	dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
716 		  mhp->attr.pbl_addr, mhp->dereg_skb, mhp->wr_waitp);
717 	if (mhp->attr.pbl_size)
718 		c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
719 				  mhp->attr.pbl_size << 3);
720 	if (mhp->kva)
721 		kfree((void *) (unsigned long) mhp->kva);
722 	ib_umem_release(mhp->umem);
723 	pr_debug("mmid 0x%x ptr %p\n", mmid, mhp);
724 	c4iw_put_wr_wait(mhp->wr_waitp);
725 	kfree(mhp);
726 	return 0;
727 }
728 
c4iw_invalidate_mr(struct c4iw_dev * rhp,u32 rkey)729 void c4iw_invalidate_mr(struct c4iw_dev *rhp, u32 rkey)
730 {
731 	struct c4iw_mr *mhp;
732 	unsigned long flags;
733 
734 	xa_lock_irqsave(&rhp->mrs, flags);
735 	mhp = xa_load(&rhp->mrs, rkey >> 8);
736 	if (mhp)
737 		mhp->attr.state = 0;
738 	xa_unlock_irqrestore(&rhp->mrs, flags);
739 }
740