/* * IBM eServer eHCA Infiniband device driver for Linux on POWER * * MR/MW functions * * Authors: Dietmar Decker * Christoph Raisch * Hoang-Nam Nguyen * * Copyright (c) 2005 IBM Corporation * * All rights reserved. * * This source code is distributed under a dual license of GPL v2.0 and OpenIB * BSD. * * OpenIB BSD License * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials * provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include "ehca_iverbs.h" #include "ehca_mrmw.h" #include "hcp_if.h" #include "hipz_hw.h" #define NUM_CHUNKS(length, chunk_size) \ (((length) + (chunk_size - 1)) / (chunk_size)) /* max number of rpages (per hcall register_rpages) */ #define MAX_RPAGES 512 /* DMEM toleration management */ #define EHCA_SECTSHIFT SECTION_SIZE_BITS #define EHCA_SECTSIZE (1UL << EHCA_SECTSHIFT) #define EHCA_HUGEPAGESHIFT 34 #define EHCA_HUGEPAGE_SIZE (1UL << EHCA_HUGEPAGESHIFT) #define EHCA_HUGEPAGE_PFN_MASK ((EHCA_HUGEPAGE_SIZE - 1) >> PAGE_SHIFT) #define EHCA_INVAL_ADDR 0xFFFFFFFFFFFFFFFFULL #define EHCA_DIR_INDEX_SHIFT 13 /* 8k Entries in 64k block */ #define EHCA_TOP_INDEX_SHIFT (EHCA_DIR_INDEX_SHIFT * 2) #define EHCA_MAP_ENTRIES (1 << EHCA_DIR_INDEX_SHIFT) #define EHCA_TOP_MAP_SIZE (0x10000) /* currently fixed map size */ #define EHCA_DIR_MAP_SIZE (0x10000) #define EHCA_ENT_MAP_SIZE (0x10000) #define EHCA_INDEX_MASK (EHCA_MAP_ENTRIES - 1) static unsigned long ehca_mr_len; /* * Memory map data structures */ struct ehca_dir_bmap { u64 ent[EHCA_MAP_ENTRIES]; }; struct ehca_top_bmap { struct ehca_dir_bmap *dir[EHCA_MAP_ENTRIES]; }; struct ehca_bmap { struct ehca_top_bmap *top[EHCA_MAP_ENTRIES]; }; static struct ehca_bmap *ehca_bmap; static struct kmem_cache *mr_cache; static struct kmem_cache *mw_cache; enum ehca_mr_pgsize { EHCA_MR_PGSIZE4K = 0x1000L, EHCA_MR_PGSIZE64K = 0x10000L, EHCA_MR_PGSIZE1M = 0x100000L, EHCA_MR_PGSIZE16M = 0x1000000L }; #define EHCA_MR_PGSHIFT4K 12 #define EHCA_MR_PGSHIFT64K 16 #define EHCA_MR_PGSHIFT1M 20 #define EHCA_MR_PGSHIFT16M 24 static u64 ehca_map_vaddr(void *caddr); static u32 ehca_encode_hwpage_size(u32 pgsize) { int log = ilog2(pgsize); WARN_ON(log < 12 || log > 24 || log & 3); return (log - 12) / 4; } static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca) { return rounddown_pow_of_two(shca->hca_cap_mr_pgsize); } static struct ehca_mr *ehca_mr_new(void) { struct ehca_mr *me; me = kmem_cache_zalloc(mr_cache, GFP_KERNEL); if (me) spin_lock_init(&me->mrlock); else ehca_gen_err("alloc failed"); return me; } static void ehca_mr_delete(struct ehca_mr *me) { kmem_cache_free(mr_cache, me); } static struct ehca_mw *ehca_mw_new(void) { struct ehca_mw *me; me = kmem_cache_zalloc(mw_cache, GFP_KERNEL); if (me) spin_lock_init(&me->mwlock); else ehca_gen_err("alloc failed"); return me; } static void ehca_mw_delete(struct ehca_mw *me) { kmem_cache_free(mw_cache, me); } /*----------------------------------------------------------------------*/ struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags) { struct ib_mr *ib_mr; int ret; struct ehca_mr *e_maxmr; struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd); struct ehca_shca *shca = container_of(pd->device, struct ehca_shca, ib_device); if (shca->maxmr) { e_maxmr = ehca_mr_new(); if (!e_maxmr) { ehca_err(&shca->ib_device, "out of memory"); ib_mr = ERR_PTR(-ENOMEM); goto get_dma_mr_exit0; } ret = ehca_reg_maxmr(shca, e_maxmr, (void *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START)), mr_access_flags, e_pd, &e_maxmr->ib.ib_mr.lkey, &e_maxmr->ib.ib_mr.rkey); if (ret) { ehca_mr_delete(e_maxmr); ib_mr = ERR_PTR(ret); goto get_dma_mr_exit0; } ib_mr = &e_maxmr->ib.ib_mr; } else { ehca_err(&shca->ib_device, "no internal max-MR exist!"); ib_mr = ERR_PTR(-EINVAL); goto get_dma_mr_exit0; } get_dma_mr_exit0: if (IS_ERR(ib_mr)) ehca_err(&shca->ib_device, "h_ret=%li pd=%p mr_access_flags=%x", PTR_ERR(ib_mr), pd, mr_access_flags); return ib_mr; } /* end ehca_get_dma_mr() */ /*----------------------------------------------------------------------*/ struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd, struct ib_phys_buf *phys_buf_array, int num_phys_buf, int mr_access_flags, u64 *iova_start) { struct ib_mr *ib_mr; int ret; struct ehca_mr *e_mr; struct ehca_shca *shca = container_of(pd->device, struct ehca_shca, ib_device); struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd); u64 size; if ((num_phys_buf <= 0) || !phys_buf_array) { ehca_err(pd->device, "bad input values: num_phys_buf=%x " "phys_buf_array=%p", num_phys_buf, phys_buf_array); ib_mr = ERR_PTR(-EINVAL); goto reg_phys_mr_exit0; } if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) && !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) || ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) && !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) { /* * Remote Write Access requires Local Write Access * Remote Atomic Access requires Local Write Access */ ehca_err(pd->device, "bad input values: mr_access_flags=%x", mr_access_flags); ib_mr = ERR_PTR(-EINVAL); goto reg_phys_mr_exit0; } /* check physical buffer list and calculate size */ ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf, iova_start, &size); if (ret) { ib_mr = ERR_PTR(ret); goto reg_phys_mr_exit0; } if ((size == 0) || (((u64)iova_start + size) < (u64)iova_start)) { ehca_err(pd->device, "bad input values: size=%llx iova_start=%p", size, iova_start); ib_mr = ERR_PTR(-EINVAL); goto reg_phys_mr_exit0; } e_mr = ehca_mr_new(); if (!e_mr) { ehca_err(pd->device, "out of memory"); ib_mr = ERR_PTR(-ENOMEM); goto reg_phys_mr_exit0; } /* register MR on HCA */ if (ehca_mr_is_maxmr(size, iova_start)) { e_mr->flags |= EHCA_MR_FLAG_MAXMR; ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags, e_pd, &e_mr->ib.ib_mr.lkey, &e_mr->ib.ib_mr.rkey); if (ret) { ib_mr = ERR_PTR(ret); goto reg_phys_mr_exit1; } } else { struct ehca_mr_pginfo pginfo; u32 num_kpages; u32 num_hwpages; u64 hw_pgsize; num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size, PAGE_SIZE); /* for kernel space we try most possible pgsize */ hw_pgsize = ehca_get_max_hwpage_size(shca); num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size, hw_pgsize); memset(&pginfo, 0, sizeof(pginfo)); pginfo.type = EHCA_MR_PGI_PHYS; pginfo.num_kpages = num_kpages; pginfo.hwpage_size = hw_pgsize; pginfo.num_hwpages = num_hwpages; pginfo.u.phy.num_phys_buf = num_phys_buf; pginfo.u.phy.phys_buf_array = phys_buf_array; pginfo.next_hwpage = ((u64)iova_start & ~PAGE_MASK) / hw_pgsize; ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags, e_pd, &pginfo, &e_mr->ib.ib_mr.lkey, &e_mr->ib.ib_mr.rkey, EHCA_REG_MR); if (ret) { ib_mr = ERR_PTR(ret); goto reg_phys_mr_exit1; } } /* successful registration of all pages */ return &e_mr->ib.ib_mr; reg_phys_mr_exit1: ehca_mr_delete(e_mr); reg_phys_mr_exit0: if (IS_ERR(ib_mr)) ehca_err(pd->device, "h_ret=%li pd=%p phys_buf_array=%p " "num_phys_buf=%x mr_access_flags=%x iova_start=%p", PTR_ERR(ib_mr), pd, phys_buf_array, num_phys_buf, mr_access_flags, iova_start); return ib_mr; } /* end ehca_reg_phys_mr() */ /*----------------------------------------------------------------------*/ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, u64 virt, int mr_access_flags, struct ib_udata *udata) { struct ib_mr *ib_mr; struct ehca_mr *e_mr; struct ehca_shca *shca = container_of(pd->device, struct ehca_shca, ib_device); struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd); struct ehca_mr_pginfo pginfo; int ret, page_shift; u32 num_kpages; u32 num_hwpages; u64 hwpage_size; if (!pd) { ehca_gen_err("bad pd=%p", pd); return ERR_PTR(-EFAULT); } if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) && !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) || ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) && !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) { /* * Remote Write Access requires Local Write Access * Remote Atomic Access requires Local Write Access */ ehca_err(pd->device, "bad input values: mr_access_flags=%x", mr_access_flags); ib_mr = ERR_PTR(-EINVAL); goto reg_user_mr_exit0; } if (length == 0 || virt + length < virt) { ehca_err(pd->device, "bad input values: length=%llx " "virt_base=%llx", length, virt); ib_mr = ERR_PTR(-EINVAL); goto reg_user_mr_exit0; } e_mr = ehca_mr_new(); if (!e_mr) { ehca_err(pd->device, "out of memory"); ib_mr = ERR_PTR(-ENOMEM); goto reg_user_mr_exit0; } e_mr->umem = ib_umem_get(pd->uobject->context, start, length, mr_access_flags, 0); if (IS_ERR(e_mr->umem)) { ib_mr = (void *)e_mr->umem; goto reg_user_mr_exit1; } if (e_mr->umem->page_size != PAGE_SIZE) { ehca_err(pd->device, "page size not supported, " "e_mr->umem->page_size=%x", e_mr->umem->page_size); ib_mr = ERR_PTR(-EINVAL); goto reg_user_mr_exit2; } /* determine number of MR pages */ num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE); /* select proper hw_pgsize */ page_shift = PAGE_SHIFT; if (e_mr->umem->hugetlb) { /* determine page_shift, clamp between 4K and 16M */ page_shift = (fls64(length - 1) + 3) & ~3; page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K), EHCA_MR_PGSHIFT16M); } hwpage_size = 1UL << page_shift; /* now that we have the desired page size, shift until it's * supported, too. 4K is always supported, so this terminates. */ while (!(hwpage_size & shca->hca_cap_mr_pgsize)) hwpage_size >>= 4; reg_user_mr_fallback: num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size); /* register MR on HCA */ memset(&pginfo, 0, sizeof(pginfo)); pginfo.type = EHCA_MR_PGI_USER; pginfo.hwpage_size = hwpage_size; pginfo.num_kpages = num_kpages; pginfo.num_hwpages = num_hwpages; pginfo.u.usr.region = e_mr->umem; pginfo.next_hwpage = e_mr->umem->offset / hwpage_size; pginfo.u.usr.next_sg = pginfo.u.usr.region->sg_head.sgl; ret = ehca_reg_mr(shca, e_mr, (u64 *)virt, length, mr_access_flags, e_pd, &pginfo, &e_mr->ib.ib_mr.lkey, &e_mr->ib.ib_mr.rkey, EHCA_REG_MR); if (ret == -EINVAL && pginfo.hwpage_size > PAGE_SIZE) { ehca_warn(pd->device, "failed to register mr " "with hwpage_size=%llx", hwpage_size); ehca_info(pd->device, "try to register mr with " "kpage_size=%lx", PAGE_SIZE); /* * this means kpages are not contiguous for a hw page * try kernel page size as fallback solution */ hwpage_size = PAGE_SIZE; goto reg_user_mr_fallback; } if (ret) { ib_mr = ERR_PTR(ret); goto reg_user_mr_exit2; } /* successful registration of all pages */ return &e_mr->ib.ib_mr; reg_user_mr_exit2: ib_umem_release(e_mr->umem); reg_user_mr_exit1: ehca_mr_delete(e_mr); reg_user_mr_exit0: if (IS_ERR(ib_mr)) ehca_err(pd->device, "rc=%li pd=%p mr_access_flags=%x udata=%p", PTR_ERR(ib_mr), pd, mr_access_flags, udata); return ib_mr; } /* end ehca_reg_user_mr() */ /*----------------------------------------------------------------------*/ int ehca_rereg_phys_mr(struct ib_mr *mr, int mr_rereg_mask, struct ib_pd *pd, struct ib_phys_buf *phys_buf_array, int num_phys_buf, int mr_access_flags, u64 *iova_start) { int ret; struct ehca_shca *shca = container_of(mr->device, struct ehca_shca, ib_device); struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr); u64 new_size; u64 *new_start; u32 new_acl; struct ehca_pd *new_pd; u32 tmp_lkey, tmp_rkey; unsigned long sl_flags; u32 num_kpages = 0; u32 num_hwpages = 0; struct ehca_mr_pginfo pginfo; if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) { /* TODO not supported, because PHYP rereg hCall needs pages */ ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not " "supported yet, mr_rereg_mask=%x", mr_rereg_mask); ret = -EINVAL; goto rereg_phys_mr_exit0; } if (mr_rereg_mask & IB_MR_REREG_PD) { if (!pd) { ehca_err(mr->device, "rereg with bad pd, pd=%p " "mr_rereg_mask=%x", pd, mr_rereg_mask); ret = -EINVAL; goto rereg_phys_mr_exit0; } } if ((mr_rereg_mask & ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) || (mr_rereg_mask == 0)) { ret = -EINVAL; goto rereg_phys_mr_exit0; } /* check other parameters */ if (e_mr == shca->maxmr) { /* should be impossible, however reject to be sure */ ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p " "shca->maxmr=%p mr->lkey=%x", mr, shca->maxmr, mr->lkey); ret = -EINVAL; goto rereg_phys_mr_exit0; } if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */ if (e_mr->flags & EHCA_MR_FLAG_FMR) { ehca_err(mr->device, "not supported for FMR, mr=%p " "flags=%x", mr, e_mr->flags); ret = -EINVAL; goto rereg_phys_mr_exit0; } if (!phys_buf_array || num_phys_buf <= 0) { ehca_err(mr->device, "bad input values mr_rereg_mask=%x" " phys_buf_array=%p num_phys_buf=%x", mr_rereg_mask, phys_buf_array, num_phys_buf); ret = -EINVAL; goto rereg_phys_mr_exit0; } } if ((mr_rereg_mask & IB_MR_REREG_ACCESS) && /* change ACL */ (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) && !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) || ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) && !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) { /* * Remote Write Access requires Local Write Access * Remote Atomic Access requires Local Write Access */ ehca_err(mr->device, "bad input values: mr_rereg_mask=%x " "mr_access_flags=%x", mr_rereg_mask, mr_access_flags); ret = -EINVAL; goto rereg_phys_mr_exit0; } /* set requested values dependent on rereg request */ spin_lock_irqsave(&e_mr->mrlock, sl_flags); new_start = e_mr->start; new_size = e_mr->size; new_acl = e_mr->acl; new_pd = container_of(mr->pd, struct ehca_pd, ib_pd); if (mr_rereg_mask & IB_MR_REREG_TRANS) { u64 hw_pgsize = ehca_get_max_hwpage_size(shca); new_start = iova_start; /* change address */ /* check physical buffer list and calculate size */ ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf, iova_start, &new_size); if (ret) goto rereg_phys_mr_exit1; if ((new_size == 0) || (((u64)iova_start + new_size) < (u64)iova_start)) { ehca_err(mr->device, "bad input values: new_size=%llx " "iova_start=%p", new_size, iova_start); ret = -EINVAL; goto rereg_phys_mr_exit1; } num_kpages = NUM_CHUNKS(((u64)new_start % PAGE_SIZE) + new_size, PAGE_SIZE); num_hwpages = NUM_CHUNKS(((u64)new_start % hw_pgsize) + new_size, hw_pgsize); memset(&pginfo, 0, sizeof(pginfo)); pginfo.type = EHCA_MR_PGI_PHYS; pginfo.num_kpages = num_kpages; pginfo.hwpage_size = hw_pgsize; pginfo.num_hwpages = num_hwpages; pginfo.u.phy.num_phys_buf = num_phys_buf; pginfo.u.phy.phys_buf_array = phys_buf_array; pginfo.next_hwpage = ((u64)iova_start & ~PAGE_MASK) / hw_pgsize; } if (mr_rereg_mask & IB_MR_REREG_ACCESS) new_acl = mr_access_flags; if (mr_rereg_mask & IB_MR_REREG_PD) new_pd = container_of(pd, struct ehca_pd, ib_pd); ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl, new_pd, &pginfo, &tmp_lkey, &tmp_rkey); if (ret) goto rereg_phys_mr_exit1; /* successful reregistration */ if (mr_rereg_mask & IB_MR_REREG_PD) mr->pd = pd; mr->lkey = tmp_lkey; mr->rkey = tmp_rkey; rereg_phys_mr_exit1: spin_unlock_irqrestore(&e_mr->mrlock, sl_flags); rereg_phys_mr_exit0: if (ret) ehca_err(mr->device, "ret=%i mr=%p mr_rereg_mask=%x pd=%p " "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x " "iova_start=%p", ret, mr, mr_rereg_mask, pd, phys_buf_array, num_phys_buf, mr_access_flags, iova_start); return ret; } /* end ehca_rereg_phys_mr() */ /*----------------------------------------------------------------------*/ int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr) { int ret = 0; u64 h_ret; struct ehca_shca *shca = container_of(mr->device, struct ehca_shca, ib_device); struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr); unsigned long sl_flags; struct ehca_mr_hipzout_parms hipzout; if ((e_mr->flags & EHCA_MR_FLAG_FMR)) { ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p " "e_mr->flags=%x", mr, e_mr, e_mr->flags); ret = -EINVAL; goto query_mr_exit0; } memset(mr_attr, 0, sizeof(struct ib_mr_attr)); spin_lock_irqsave(&e_mr->mrlock, sl_flags); h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout); if (h_ret != H_SUCCESS) { ehca_err(mr->device, "hipz_mr_query failed, h_ret=%lli mr=%p " "hca_hndl=%llx mr_hndl=%llx lkey=%x", h_ret, mr, shca->ipz_hca_handle.handle, e_mr->ipz_mr_handle.handle, mr->lkey); ret = ehca2ib_return_code(h_ret); goto query_mr_exit1; } mr_attr->pd = mr->pd; mr_attr->device_virt_addr = hipzout.vaddr; mr_attr->size = hipzout.len; mr_attr->lkey = hipzout.lkey; mr_attr->rkey = hipzout.rkey; ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags); query_mr_exit1: spin_unlock_irqrestore(&e_mr->mrlock, sl_flags); query_mr_exit0: if (ret) ehca_err(mr->device, "ret=%i mr=%p mr_attr=%p", ret, mr, mr_attr); return ret; } /* end ehca_query_mr() */ /*----------------------------------------------------------------------*/ int ehca_dereg_mr(struct ib_mr *mr) { int ret = 0; u64 h_ret; struct ehca_shca *shca = container_of(mr->device, struct ehca_shca, ib_device); struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr); if ((e_mr->flags & EHCA_MR_FLAG_FMR)) { ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p " "e_mr->flags=%x", mr, e_mr, e_mr->flags); ret = -EINVAL; goto dereg_mr_exit0; } else if (e_mr == shca->maxmr) { /* should be impossible, however reject to be sure */ ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p " "shca->maxmr=%p mr->lkey=%x", mr, shca->maxmr, mr->lkey); ret = -EINVAL; goto dereg_mr_exit0; } /* TODO: BUSY: MR still has bound window(s) */ h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr); if (h_ret != H_SUCCESS) { ehca_err(mr->device, "hipz_free_mr failed, h_ret=%lli shca=%p " "e_mr=%p hca_hndl=%llx mr_hndl=%llx mr->lkey=%x", h_ret, shca, e_mr, shca->ipz_hca_handle.handle, e_mr->ipz_mr_handle.handle, mr->lkey); ret = ehca2ib_return_code(h_ret); goto dereg_mr_exit0; } if (e_mr->umem) ib_umem_release(e_mr->umem); /* successful deregistration */ ehca_mr_delete(e_mr); dereg_mr_exit0: if (ret) ehca_err(mr->device, "ret=%i mr=%p", ret, mr); return ret; } /* end ehca_dereg_mr() */ /*----------------------------------------------------------------------*/ struct ib_mw *ehca_alloc_mw(struct ib_pd *pd, enum ib_mw_type type) { struct ib_mw *ib_mw; u64 h_ret; struct ehca_mw *e_mw; struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd); struct ehca_shca *shca = container_of(pd->device, struct ehca_shca, ib_device); struct ehca_mw_hipzout_parms hipzout; if (type != IB_MW_TYPE_1) return ERR_PTR(-EINVAL); e_mw = ehca_mw_new(); if (!e_mw) { ib_mw = ERR_PTR(-ENOMEM); goto alloc_mw_exit0; } h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw, e_pd->fw_pd, &hipzout); if (h_ret != H_SUCCESS) { ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%lli " "shca=%p hca_hndl=%llx mw=%p", h_ret, shca, shca->ipz_hca_handle.handle, e_mw); ib_mw = ERR_PTR(ehca2ib_return_code(h_ret)); goto alloc_mw_exit1; } /* successful MW allocation */ e_mw->ipz_mw_handle = hipzout.handle; e_mw->ib_mw.rkey = hipzout.rkey; return &e_mw->ib_mw; alloc_mw_exit1: ehca_mw_delete(e_mw); alloc_mw_exit0: if (IS_ERR(ib_mw)) ehca_err(pd->device, "h_ret=%li pd=%p", PTR_ERR(ib_mw), pd); return ib_mw; } /* end ehca_alloc_mw() */ /*----------------------------------------------------------------------*/ int ehca_bind_mw(struct ib_qp *qp, struct ib_mw *mw, struct ib_mw_bind *mw_bind) { /* TODO: not supported up to now */ ehca_gen_err("bind MW currently not supported by HCAD"); return -EPERM; } /* end ehca_bind_mw() */ /*----------------------------------------------------------------------*/ int ehca_dealloc_mw(struct ib_mw *mw) { u64 h_ret; struct ehca_shca *shca = container_of(mw->device, struct ehca_shca, ib_device); struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw); h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw); if (h_ret != H_SUCCESS) { ehca_err(mw->device, "hipz_free_mw failed, h_ret=%lli shca=%p " "mw=%p rkey=%x hca_hndl=%llx mw_hndl=%llx", h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle, e_mw->ipz_mw_handle.handle); return ehca2ib_return_code(h_ret); } /* successful deallocation */ ehca_mw_delete(e_mw); return 0; } /* end ehca_dealloc_mw() */ /*----------------------------------------------------------------------*/ struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd, int mr_access_flags, struct ib_fmr_attr *fmr_attr) { struct ib_fmr *ib_fmr; struct ehca_shca *shca = container_of(pd->device, struct ehca_shca, ib_device); struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd); struct ehca_mr *e_fmr; int ret; u32 tmp_lkey, tmp_rkey; struct ehca_mr_pginfo pginfo; u64 hw_pgsize; /* check other parameters */ if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) && !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) || ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) && !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) { /* * Remote Write Access requires Local Write Access * Remote Atomic Access requires Local Write Access */ ehca_err(pd->device, "bad input values: mr_access_flags=%x", mr_access_flags); ib_fmr = ERR_PTR(-EINVAL); goto alloc_fmr_exit0; } if (mr_access_flags & IB_ACCESS_MW_BIND) { ehca_err(pd->device, "bad input values: mr_access_flags=%x", mr_access_flags); ib_fmr = ERR_PTR(-EINVAL); goto alloc_fmr_exit0; } if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) { ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x " "fmr_attr->max_maps=%x fmr_attr->page_shift=%x", fmr_attr->max_pages, fmr_attr->max_maps, fmr_attr->page_shift); ib_fmr = ERR_PTR(-EINVAL); goto alloc_fmr_exit0; } hw_pgsize = 1 << fmr_attr->page_shift; if (!(hw_pgsize & shca->hca_cap_mr_pgsize)) { ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x", fmr_attr->page_shift); ib_fmr = ERR_PTR(-EINVAL); goto alloc_fmr_exit0; } e_fmr = ehca_mr_new(); if (!e_fmr) { ib_fmr = ERR_PTR(-ENOMEM); goto alloc_fmr_exit0; } e_fmr->flags |= EHCA_MR_FLAG_FMR; /* register MR on HCA */ memset(&pginfo, 0, sizeof(pginfo)); pginfo.hwpage_size = hw_pgsize; /* * pginfo.num_hwpages==0, ie register_rpages() will not be called * but deferred to map_phys_fmr() */ ret = ehca_reg_mr(shca, e_fmr, NULL, fmr_attr->max_pages * (1 << fmr_attr->page_shift), mr_access_flags, e_pd, &pginfo, &tmp_lkey, &tmp_rkey, EHCA_REG_MR); if (ret) { ib_fmr = ERR_PTR(ret); goto alloc_fmr_exit1; } /* successful */ e_fmr->hwpage_size = hw_pgsize; e_fmr->fmr_page_size = 1 << fmr_attr->page_shift; e_fmr->fmr_max_pages = fmr_attr->max_pages; e_fmr->fmr_max_maps = fmr_attr->max_maps; e_fmr->fmr_map_cnt = 0; return &e_fmr->ib.ib_fmr; alloc_fmr_exit1: ehca_mr_delete(e_fmr); alloc_fmr_exit0: return ib_fmr; } /* end ehca_alloc_fmr() */ /*----------------------------------------------------------------------*/ int ehca_map_phys_fmr(struct ib_fmr *fmr, u64 *page_list, int list_len, u64 iova) { int ret; struct ehca_shca *shca = container_of(fmr->device, struct ehca_shca, ib_device); struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr); struct ehca_pd *e_pd = container_of(fmr->pd, struct ehca_pd, ib_pd); struct ehca_mr_pginfo pginfo; u32 tmp_lkey, tmp_rkey; if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) { ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x", e_fmr, e_fmr->flags); ret = -EINVAL; goto map_phys_fmr_exit0; } ret = ehca_fmr_check_page_list(e_fmr, page_list, list_len); if (ret) goto map_phys_fmr_exit0; if (iova % e_fmr->fmr_page_size) { /* only whole-numbered pages */ ehca_err(fmr->device, "bad iova, iova=%llx fmr_page_size=%x", iova, e_fmr->fmr_page_size); ret = -EINVAL; goto map_phys_fmr_exit0; } if (e_fmr->fmr_map_cnt >= e_fmr->fmr_max_maps) { /* HCAD does not limit the maps, however trace this anyway */ ehca_info(fmr->device, "map limit exceeded, fmr=%p " "e_fmr->fmr_map_cnt=%x e_fmr->fmr_max_maps=%x", fmr, e_fmr->fmr_map_cnt, e_fmr->fmr_max_maps); } memset(&pginfo, 0, sizeof(pginfo)); pginfo.type = EHCA_MR_PGI_FMR; pginfo.num_kpages = list_len; pginfo.hwpage_size = e_fmr->hwpage_size; pginfo.num_hwpages = list_len * e_fmr->fmr_page_size / pginfo.hwpage_size; pginfo.u.fmr.page_list = page_list; pginfo.next_hwpage = (iova & (e_fmr->fmr_page_size-1)) / pginfo.hwpage_size; pginfo.u.fmr.fmr_pgsize = e_fmr->fmr_page_size; ret = ehca_rereg_mr(shca, e_fmr, (u64 *)iova, list_len * e_fmr->fmr_page_size, e_fmr->acl, e_pd, &pginfo, &tmp_lkey, &tmp_rkey); if (ret) goto map_phys_fmr_exit0; /* successful reregistration */ e_fmr->fmr_map_cnt++; e_fmr->ib.ib_fmr.lkey = tmp_lkey; e_fmr->ib.ib_fmr.rkey = tmp_rkey; return 0; map_phys_fmr_exit0: if (ret) ehca_err(fmr->device, "ret=%i fmr=%p page_list=%p list_len=%x " "iova=%llx", ret, fmr, page_list, list_len, iova); return ret; } /* end ehca_map_phys_fmr() */ /*----------------------------------------------------------------------*/ int ehca_unmap_fmr(struct list_head *fmr_list) { int ret = 0; struct ib_fmr *ib_fmr; struct ehca_shca *shca = NULL; struct ehca_shca *prev_shca; struct ehca_mr *e_fmr; u32 num_fmr = 0; u32 unmap_fmr_cnt = 0; /* check all FMR belong to same SHCA, and check internal flag */ list_for_each_entry(ib_fmr, fmr_list, list) { prev_shca = shca; shca = container_of(ib_fmr->device, struct ehca_shca, ib_device); e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr); if ((shca != prev_shca) && prev_shca) { ehca_err(&shca->ib_device, "SHCA mismatch, shca=%p " "prev_shca=%p e_fmr=%p", shca, prev_shca, e_fmr); ret = -EINVAL; goto unmap_fmr_exit0; } if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) { ehca_err(&shca->ib_device, "not a FMR, e_fmr=%p " "e_fmr->flags=%x", e_fmr, e_fmr->flags); ret = -EINVAL; goto unmap_fmr_exit0; } num_fmr++; } /* loop over all FMRs to unmap */ list_for_each_entry(ib_fmr, fmr_list, list) { unmap_fmr_cnt++; e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr); shca = container_of(ib_fmr->device, struct ehca_shca, ib_device); ret = ehca_unmap_one_fmr(shca, e_fmr); if (ret) { /* unmap failed, stop unmapping of rest of FMRs */ ehca_err(&shca->ib_device, "unmap of one FMR failed, " "stop rest, e_fmr=%p num_fmr=%x " "unmap_fmr_cnt=%x lkey=%x", e_fmr, num_fmr, unmap_fmr_cnt, e_fmr->ib.ib_fmr.lkey); goto unmap_fmr_exit0; } } unmap_fmr_exit0: if (ret) ehca_gen_err("ret=%i fmr_list=%p num_fmr=%x unmap_fmr_cnt=%x", ret, fmr_list, num_fmr, unmap_fmr_cnt); return ret; } /* end ehca_unmap_fmr() */ /*----------------------------------------------------------------------*/ int ehca_dealloc_fmr(struct ib_fmr *fmr) { int ret; u64 h_ret; struct ehca_shca *shca = container_of(fmr->device, struct ehca_shca, ib_device); struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr); if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) { ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x", e_fmr, e_fmr->flags); ret = -EINVAL; goto free_fmr_exit0; } h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr); if (h_ret != H_SUCCESS) { ehca_err(fmr->device, "hipz_free_mr failed, h_ret=%lli e_fmr=%p " "hca_hndl=%llx fmr_hndl=%llx fmr->lkey=%x", h_ret, e_fmr, shca->ipz_hca_handle.handle, e_fmr->ipz_mr_handle.handle, fmr->lkey); ret = ehca2ib_return_code(h_ret); goto free_fmr_exit0; } /* successful deregistration */ ehca_mr_delete(e_fmr); return 0; free_fmr_exit0: if (ret) ehca_err(&shca->ib_device, "ret=%i fmr=%p", ret, fmr); return ret; } /* end ehca_dealloc_fmr() */ /*----------------------------------------------------------------------*/ static int ehca_reg_bmap_mr_rpages(struct ehca_shca *shca, struct ehca_mr *e_mr, struct ehca_mr_pginfo *pginfo); int ehca_reg_mr(struct ehca_shca *shca, struct ehca_mr *e_mr, u64 *iova_start, u64 size, int acl, struct ehca_pd *e_pd, struct ehca_mr_pginfo *pginfo, u32 *lkey, /*OUT*/ u32 *rkey, /*OUT*/ enum ehca_reg_type reg_type) { int ret; u64 h_ret; u32 hipz_acl; struct ehca_mr_hipzout_parms hipzout; ehca_mrmw_map_acl(acl, &hipz_acl); ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl); if (ehca_use_hp_mr == 1) hipz_acl |= 0x00000001; h_ret = hipz_h_alloc_resource_mr(shca->ipz_hca_handle, e_mr, (u64)iova_start, size, hipz_acl, e_pd->fw_pd, &hipzout); if (h_ret != H_SUCCESS) { ehca_err(&shca->ib_device, "hipz_alloc_mr failed, h_ret=%lli " "hca_hndl=%llx", h_ret, shca->ipz_hca_handle.handle); ret = ehca2ib_return_code(h_ret); goto ehca_reg_mr_exit0; } e_mr->ipz_mr_handle = hipzout.handle; if (reg_type == EHCA_REG_BUSMAP_MR) ret = ehca_reg_bmap_mr_rpages(shca, e_mr, pginfo); else if (reg_type == EHCA_REG_MR) ret = ehca_reg_mr_rpages(shca, e_mr, pginfo); else ret = -EINVAL; if (ret) goto ehca_reg_mr_exit1; /* successful registration */ e_mr->num_kpages = pginfo->num_kpages; e_mr->num_hwpages = pginfo->num_hwpages; e_mr->hwpage_size = pginfo->hwpage_size; e_mr->start = iova_start; e_mr->size = size; e_mr->acl = acl; *lkey = hipzout.lkey; *rkey = hipzout.rkey; return 0; ehca_reg_mr_exit1: h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr); if (h_ret != H_SUCCESS) { ehca_err(&shca->ib_device, "h_ret=%lli shca=%p e_mr=%p " "iova_start=%p size=%llx acl=%x e_pd=%p lkey=%x " "pginfo=%p num_kpages=%llx num_hwpages=%llx ret=%i", h_ret, shca, e_mr, iova_start, size, acl, e_pd, hipzout.lkey, pginfo, pginfo->num_kpages, pginfo->num_hwpages, ret); ehca_err(&shca->ib_device, "internal error in ehca_reg_mr, " "not recoverable"); } ehca_reg_mr_exit0: if (ret) ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p " "iova_start=%p size=%llx acl=%x e_pd=%p pginfo=%p " "num_kpages=%llx num_hwpages=%llx", ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo, pginfo->num_kpages, pginfo->num_hwpages); return ret; } /* end ehca_reg_mr() */ /*----------------------------------------------------------------------*/ int ehca_reg_mr_rpages(struct ehca_shca *shca, struct ehca_mr *e_mr, struct ehca_mr_pginfo *pginfo) { int ret = 0; u64 h_ret; u32 rnum; u64 rpage; u32 i; u64 *kpage; if (!pginfo->num_hwpages) /* in case of fmr */ return 0; kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL); if (!kpage) { ehca_err(&shca->ib_device, "kpage alloc failed"); ret = -ENOMEM; goto ehca_reg_mr_rpages_exit0; } /* max MAX_RPAGES ehca mr pages per register call */ for (i = 0; i < NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES); i++) { if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) { rnum = pginfo->num_hwpages % MAX_RPAGES; /* last shot */ if (rnum == 0) rnum = MAX_RPAGES; /* last shot is full */ } else rnum = MAX_RPAGES; ret = ehca_set_pagebuf(pginfo, rnum, kpage); if (ret) { ehca_err(&shca->ib_device, "ehca_set_pagebuf " "bad rc, ret=%i rnum=%x kpage=%p", ret, rnum, kpage); goto ehca_reg_mr_rpages_exit1; } if (rnum > 1) { rpage = __pa(kpage); if (!rpage) { ehca_err(&shca->ib_device, "kpage=%p i=%x", kpage, i); ret = -EFAULT; goto ehca_reg_mr_rpages_exit1; } } else rpage = *kpage; h_ret = hipz_h_register_rpage_mr( shca->ipz_hca_handle, e_mr, ehca_encode_hwpage_size(pginfo->hwpage_size), 0, rpage, rnum); if (i == NUM_CHUNKS(pginfo->num_hwpages, MAX_RPAGES) - 1) { /* * check for 'registration complete'==H_SUCCESS * and for 'page registered'==H_PAGE_REGISTERED */ if (h_ret != H_SUCCESS) { ehca_err(&shca->ib_device, "last " "hipz_reg_rpage_mr failed, h_ret=%lli " "e_mr=%p i=%x hca_hndl=%llx mr_hndl=%llx" " lkey=%x", h_ret, e_mr, i, shca->ipz_hca_handle.handle, e_mr->ipz_mr_handle.handle, e_mr->ib.ib_mr.lkey); ret = ehca2ib_return_code(h_ret); break; } else ret = 0; } else if (h_ret != H_PAGE_REGISTERED) { ehca_err(&shca->ib_device, "hipz_reg_rpage_mr failed, " "h_ret=%lli e_mr=%p i=%x lkey=%x hca_hndl=%llx " "mr_hndl=%llx", h_ret, e_mr, i, e_mr->ib.ib_mr.lkey, shca->ipz_hca_handle.handle, e_mr->ipz_mr_handle.handle); ret = ehca2ib_return_code(h_ret); break; } else ret = 0; } /* end for(i) */ ehca_reg_mr_rpages_exit1: ehca_free_fw_ctrlblock(kpage); ehca_reg_mr_rpages_exit0: if (ret) ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p pginfo=%p " "num_kpages=%llx num_hwpages=%llx", ret, shca, e_mr, pginfo, pginfo->num_kpages, pginfo->num_hwpages); return ret; } /* end ehca_reg_mr_rpages() */ /*----------------------------------------------------------------------*/ inline int ehca_rereg_mr_rereg1(struct ehca_shca *shca, struct ehca_mr *e_mr, u64 *iova_start, u64 size, u32 acl, struct ehca_pd *e_pd, struct ehca_mr_pginfo *pginfo, u32 *lkey, /*OUT*/ u32 *rkey) /*OUT*/ { int ret; u64 h_ret; u32 hipz_acl; u64 *kpage; u64 rpage; struct ehca_mr_pginfo pginfo_save; struct ehca_mr_hipzout_parms hipzout; ehca_mrmw_map_acl(acl, &hipz_acl); ehca_mrmw_set_pgsize_hipz_acl(pginfo->hwpage_size, &hipz_acl); kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL); if (!kpage) { ehca_err(&shca->ib_device, "kpage alloc failed"); ret = -ENOMEM; goto ehca_rereg_mr_rereg1_exit0; } pginfo_save = *pginfo; ret = ehca_set_pagebuf(pginfo, pginfo->num_hwpages, kpage); if (ret) { ehca_err(&shca->ib_device, "set pagebuf failed, e_mr=%p " "pginfo=%p type=%x num_kpages=%llx num_hwpages=%llx " "kpage=%p", e_mr, pginfo, pginfo->type, pginfo->num_kpages, pginfo->num_hwpages, kpage); goto ehca_rereg_mr_rereg1_exit1; } rpage = __pa(kpage); if (!rpage) { ehca_err(&shca->ib_device, "kpage=%p", kpage); ret = -EFAULT; goto ehca_rereg_mr_rereg1_exit1; } h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_mr, (u64)iova_start, size, hipz_acl, e_pd->fw_pd, rpage, &hipzout); if (h_ret != H_SUCCESS) { /* * reregistration unsuccessful, try it again with the 3 hCalls, * e.g. this is required in case H_MR_CONDITION * (MW bound or MR is shared) */ ehca_warn(&shca->ib_device, "hipz_h_reregister_pmr failed " "(Rereg1), h_ret=%lli e_mr=%p", h_ret, e_mr); *pginfo = pginfo_save; ret = -EAGAIN; } else if ((u64 *)hipzout.vaddr != iova_start) { ehca_err(&shca->ib_device, "PHYP changed iova_start in " "rereg_pmr, iova_start=%p iova_start_out=%llx e_mr=%p " "mr_handle=%llx lkey=%x lkey_out=%x", iova_start, hipzout.vaddr, e_mr, e_mr->ipz_mr_handle.handle, e_mr->ib.ib_mr.lkey, hipzout.lkey); ret = -EFAULT; } else { /* * successful reregistration * note: start and start_out are identical for eServer HCAs */ e_mr->num_kpages = pginfo->num_kpages; e_mr->num_hwpages = pginfo->num_hwpages; e_mr->hwpage_size = pginfo->hwpage_size; e_mr->start = iova_start; e_mr->size = size; e_mr->acl = acl; *lkey = hipzout.lkey; *rkey = hipzout.rkey; } ehca_rereg_mr_rereg1_exit1: ehca_free_fw_ctrlblock(kpage); ehca_rereg_mr_rereg1_exit0: if ( ret && (ret != -EAGAIN) ) ehca_err(&shca->ib_device, "ret=%i lkey=%x rkey=%x " "pginfo=%p num_kpages=%llx num_hwpages=%llx", ret, *lkey, *rkey, pginfo, pginfo->num_kpages, pginfo->num_hwpages); return ret; } /* end ehca_rereg_mr_rereg1() */ /*----------------------------------------------------------------------*/ int ehca_rereg_mr(struct ehca_shca *shca, struct ehca_mr *e_mr, u64 *iova_start, u64 size, int acl, struct ehca_pd *e_pd, struct ehca_mr_pginfo *pginfo, u32 *lkey, u32 *rkey) { int ret = 0; u64 h_ret; int rereg_1_hcall = 1; /* 1: use hipz_h_reregister_pmr directly */ int rereg_3_hcall = 0; /* 1: use 3 hipz calls for reregistration */ /* first determine reregistration hCall(s) */ if ((pginfo->num_hwpages > MAX_RPAGES) || (e_mr->num_hwpages > MAX_RPAGES) || (pginfo->num_hwpages > e_mr->num_hwpages)) { ehca_dbg(&shca->ib_device, "Rereg3 case, " "pginfo->num_hwpages=%llx e_mr->num_hwpages=%x", pginfo->num_hwpages, e_mr->num_hwpages); rereg_1_hcall = 0; rereg_3_hcall = 1; } if (e_mr->flags & EHCA_MR_FLAG_MAXMR) { /* check for max-MR */ rereg_1_hcall = 0; rereg_3_hcall = 1; e_mr->flags &= ~EHCA_MR_FLAG_MAXMR; ehca_err(&shca->ib_device, "Rereg MR for max-MR! e_mr=%p", e_mr); } if (rereg_1_hcall) { ret = ehca_rereg_mr_rereg1(shca, e_mr, iova_start, size, acl, e_pd, pginfo, lkey, rkey); if (ret) { if (ret == -EAGAIN) rereg_3_hcall = 1; else goto ehca_rereg_mr_exit0; } } if (rereg_3_hcall) { struct ehca_mr save_mr; /* first deregister old MR */ h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr); if (h_ret != H_SUCCESS) { ehca_err(&shca->ib_device, "hipz_free_mr failed, " "h_ret=%lli e_mr=%p hca_hndl=%llx mr_hndl=%llx " "mr->lkey=%x", h_ret, e_mr, shca->ipz_hca_handle.handle, e_mr->ipz_mr_handle.handle, e_mr->ib.ib_mr.lkey); ret = ehca2ib_return_code(h_ret); goto ehca_rereg_mr_exit0; } /* clean ehca_mr_t, without changing struct ib_mr and lock */ save_mr = *e_mr; ehca_mr_deletenew(e_mr); /* set some MR values */ e_mr->flags = save_mr.flags; e_mr->hwpage_size = save_mr.hwpage_size; e_mr->fmr_page_size = save_mr.fmr_page_size; e_mr->fmr_max_pages = save_mr.fmr_max_pages; e_mr->fmr_max_maps = save_mr.fmr_max_maps; e_mr->fmr_map_cnt = save_mr.fmr_map_cnt; ret = ehca_reg_mr(shca, e_mr, iova_start, size, acl, e_pd, pginfo, lkey, rkey, EHCA_REG_MR); if (ret) { u32 offset = (u64)(&e_mr->flags) - (u64)e_mr; memcpy(&e_mr->flags, &(save_mr.flags), sizeof(struct ehca_mr) - offset); goto ehca_rereg_mr_exit0; } } ehca_rereg_mr_exit0: if (ret) ehca_err(&shca->ib_device, "ret=%i shca=%p e_mr=%p " "iova_start=%p size=%llx acl=%x e_pd=%p pginfo=%p " "num_kpages=%llx lkey=%x rkey=%x rereg_1_hcall=%x " "rereg_3_hcall=%x", ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo, pginfo->num_kpages, *lkey, *rkey, rereg_1_hcall, rereg_3_hcall); return ret; } /* end ehca_rereg_mr() */ /*----------------------------------------------------------------------*/ int ehca_unmap_one_fmr(struct ehca_shca *shca, struct ehca_mr *e_fmr) { int ret = 0; u64 h_ret; struct ehca_pd *e_pd = container_of(e_fmr->ib.ib_fmr.pd, struct ehca_pd, ib_pd); struct ehca_mr save_fmr; u32 tmp_lkey, tmp_rkey; struct ehca_mr_pginfo pginfo; struct ehca_mr_hipzout_parms hipzout; struct ehca_mr save_mr; if (e_fmr->fmr_max_pages <= MAX_RPAGES) { /* * note: after using rereg hcall with len=0, * rereg hcall must be used again for registering pages */ h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_fmr, 0, 0, 0, e_pd->fw_pd, 0, &hipzout); if (h_ret == H_SUCCESS) { /* successful reregistration */ e_fmr->start = NULL; e_fmr->size = 0; tmp_lkey = hipzout.lkey; tmp_rkey = hipzout.rkey; return 0; } /* * should not happen, because length checked above, * FMRs are not shared and no MW bound to FMRs */ ehca_err(&shca->ib_device, "hipz_reregister_pmr failed " "(Rereg1), h_ret=%lli e_fmr=%p hca_hndl=%llx " "mr_hndl=%llx lkey=%x lkey_out=%x", h_ret, e_fmr, shca->ipz_hca_handle.handle, e_fmr->ipz_mr_handle.handle, e_fmr->ib.ib_fmr.lkey, hipzout.lkey); /* try free and rereg */ } /* first free old FMR */ h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr); if (h_ret != H_SUCCESS) { ehca_err(&shca->ib_device, "hipz_free_mr failed, " "h_ret=%lli e_fmr=%p hca_hndl=%llx mr_hndl=%llx " "lkey=%x", h_ret, e_fmr, shca->ipz_hca_handle.handle, e_fmr->ipz_mr_handle.handle, e_fmr->ib.ib_fmr.lkey); ret = ehca2ib_return_code(h_ret); goto ehca_unmap_one_fmr_exit0; } /* clean ehca_mr_t, without changing lock */ save_fmr = *e_fmr; ehca_mr_deletenew(e_fmr); /* set some MR values */ e_fmr->flags = save_fmr.flags; e_fmr->hwpage_size = save_fmr.hwpage_size; e_fmr->fmr_page_size = save_fmr.fmr_page_size; e_fmr->fmr_max_pages = save_fmr.fmr_max_pages; e_fmr->fmr_max_maps = save_fmr.fmr_max_maps; e_fmr->fmr_map_cnt = save_fmr.fmr_map_cnt; e_fmr->acl = save_fmr.acl; memset(&pginfo, 0, sizeof(pginfo)); pginfo.type = EHCA_MR_PGI_FMR; ret = ehca_reg_mr(shca, e_fmr, NULL, (e_fmr->fmr_max_pages * e_fmr->fmr_page_size), e_fmr->acl, e_pd, &pginfo, &tmp_lkey, &tmp_rkey, EHCA_REG_MR); if (ret) { u32 offset = (u64)(&e_fmr->flags) - (u64)e_fmr; memcpy(&e_fmr->flags, &(save_mr.flags), sizeof(struct ehca_mr) - offset); } ehca_unmap_one_fmr_exit0: if (ret) ehca_err(&shca->ib_device, "ret=%i tmp_lkey=%x tmp_rkey=%x " "fmr_max_pages=%x", ret, tmp_lkey, tmp_rkey, e_fmr->fmr_max_pages); return ret; } /* end ehca_unmap_one_fmr() */ /*----------------------------------------------------------------------*/ int ehca_reg_smr(struct ehca_shca *shca, struct ehca_mr *e_origmr, struct ehca_mr *e_newmr, u64 *iova_start, int acl, struct ehca_pd *e_pd, u32 *lkey, /*OUT*/ u32 *rkey) /*OUT*/ { int ret = 0; u64 h_ret; u32 hipz_acl; struct ehca_mr_hipzout_parms hipzout; ehca_mrmw_map_acl(acl, &hipz_acl); ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl); h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr, (u64)iova_start, hipz_acl, e_pd->fw_pd, &hipzout); if (h_ret != H_SUCCESS) { ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lli " "shca=%p e_origmr=%p e_newmr=%p iova_start=%p acl=%x " "e_pd=%p hca_hndl=%llx mr_hndl=%llx lkey=%x", h_ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd, shca->ipz_hca_handle.handle, e_origmr->ipz_mr_handle.handle, e_origmr->ib.ib_mr.lkey); ret = ehca2ib_return_code(h_ret); goto ehca_reg_smr_exit0; } /* successful registration */ e_newmr->num_kpages = e_origmr->num_kpages; e_newmr->num_hwpages = e_origmr->num_hwpages; e_newmr->hwpage_size = e_origmr->hwpage_size; e_newmr->start = iova_start; e_newmr->size = e_origmr->size; e_newmr->acl = acl; e_newmr->ipz_mr_handle = hipzout.handle; *lkey = hipzout.lkey; *rkey = hipzout.rkey; return 0; ehca_reg_smr_exit0: if (ret) ehca_err(&shca->ib_device, "ret=%i shca=%p e_origmr=%p " "e_newmr=%p iova_start=%p acl=%x e_pd=%p", ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd); return ret; } /* end ehca_reg_smr() */ /*----------------------------------------------------------------------*/ static inline void *ehca_calc_sectbase(int top, int dir, int idx) { unsigned long ret = idx; ret |= dir << EHCA_DIR_INDEX_SHIFT; ret |= top << EHCA_TOP_INDEX_SHIFT; return __va(ret << SECTION_SIZE_BITS); } #define ehca_bmap_valid(entry) \ ((u64)entry != (u64)EHCA_INVAL_ADDR) static u64 ehca_reg_mr_section(int top, int dir, int idx, u64 *kpage, struct ehca_shca *shca, struct ehca_mr *mr, struct ehca_mr_pginfo *pginfo) { u64 h_ret = 0; unsigned long page = 0; u64 rpage = __pa(kpage); int page_count; void *sectbase = ehca_calc_sectbase(top, dir, idx); if ((unsigned long)sectbase & (pginfo->hwpage_size - 1)) { ehca_err(&shca->ib_device, "reg_mr_section will probably fail:" "hwpage_size does not fit to " "section start address"); } page_count = EHCA_SECTSIZE / pginfo->hwpage_size; while (page < page_count) { u64 rnum; for (rnum = 0; (rnum < MAX_RPAGES) && (page < page_count); rnum++) { void *pg = sectbase + ((page++) * pginfo->hwpage_size); kpage[rnum] = __pa(pg); } h_ret = hipz_h_register_rpage_mr(shca->ipz_hca_handle, mr, ehca_encode_hwpage_size(pginfo->hwpage_size), 0, rpage, rnum); if ((h_ret != H_SUCCESS) && (h_ret != H_PAGE_REGISTERED)) { ehca_err(&shca->ib_device, "register_rpage_mr failed"); return h_ret; } } return h_ret; } static u64 ehca_reg_mr_sections(int top, int dir, u64 *kpage, struct ehca_shca *shca, struct ehca_mr *mr, struct ehca_mr_pginfo *pginfo) { u64 hret = H_SUCCESS; int idx; for (idx = 0; idx < EHCA_MAP_ENTRIES; idx++) { if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir]->ent[idx])) continue; hret = ehca_reg_mr_section(top, dir, idx, kpage, shca, mr, pginfo); if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) return hret; } return hret; } static u64 ehca_reg_mr_dir_sections(int top, u64 *kpage, struct ehca_shca *shca, struct ehca_mr *mr, struct ehca_mr_pginfo *pginfo) { u64 hret = H_SUCCESS; int dir; for (dir = 0; dir < EHCA_MAP_ENTRIES; dir++) { if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir])) continue; hret = ehca_reg_mr_sections(top, dir, kpage, shca, mr, pginfo); if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED)) return hret; } return hret; } /* register internal max-MR to internal SHCA */ int ehca_reg_internal_maxmr( struct ehca_shca *shca, struct ehca_pd *e_pd, struct ehca_mr **e_maxmr) /*OUT*/ { int ret; struct ehca_mr *e_mr; u64 *iova_start; u64 size_maxmr; struct ehca_mr_pginfo pginfo; struct ib_phys_buf ib_pbuf; u32 num_kpages; u32 num_hwpages; u64 hw_pgsize; if (!ehca_bmap) { ret = -EFAULT; goto ehca_reg_internal_maxmr_exit0; } e_mr = ehca_mr_new(); if (!e_mr) { ehca_err(&shca->ib_device, "out of memory"); ret = -ENOMEM; goto ehca_reg_internal_maxmr_exit0; } e_mr->flags |= EHCA_MR_FLAG_MAXMR; /* register internal max-MR on HCA */ size_maxmr = ehca_mr_len; iova_start = (u64 *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START)); ib_pbuf.addr = 0; ib_pbuf.size = size_maxmr; num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr, PAGE_SIZE); hw_pgsize = ehca_get_max_hwpage_size(shca); num_hwpages = NUM_CHUNKS(((u64)iova_start % hw_pgsize) + size_maxmr, hw_pgsize); memset(&pginfo, 0, sizeof(pginfo)); pginfo.type = EHCA_MR_PGI_PHYS; pginfo.num_kpages = num_kpages; pginfo.num_hwpages = num_hwpages; pginfo.hwpage_size = hw_pgsize; pginfo.u.phy.num_phys_buf = 1; pginfo.u.phy.phys_buf_array = &ib_pbuf; ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd, &pginfo, &e_mr->ib.ib_mr.lkey, &e_mr->ib.ib_mr.rkey, EHCA_REG_BUSMAP_MR); if (ret) { ehca_err(&shca->ib_device, "reg of internal max MR failed, " "e_mr=%p iova_start=%p size_maxmr=%llx num_kpages=%x " "num_hwpages=%x", e_mr, iova_start, size_maxmr, num_kpages, num_hwpages); goto ehca_reg_internal_maxmr_exit1; } /* successful registration of all pages */ e_mr->ib.ib_mr.device = e_pd->ib_pd.device; e_mr->ib.ib_mr.pd = &e_pd->ib_pd; e_mr->ib.ib_mr.uobject = NULL; atomic_inc(&(e_pd->ib_pd.usecnt)); atomic_set(&(e_mr->ib.ib_mr.usecnt), 0); *e_maxmr = e_mr; return 0; ehca_reg_internal_maxmr_exit1: ehca_mr_delete(e_mr); ehca_reg_internal_maxmr_exit0: if (ret) ehca_err(&shca->ib_device, "ret=%i shca=%p e_pd=%p e_maxmr=%p", ret, shca, e_pd, e_maxmr); return ret; } /* end ehca_reg_internal_maxmr() */ /*----------------------------------------------------------------------*/ int ehca_reg_maxmr(struct ehca_shca *shca, struct ehca_mr *e_newmr, u64 *iova_start, int acl, struct ehca_pd *e_pd, u32 *lkey, u32 *rkey) { u64 h_ret; struct ehca_mr *e_origmr = shca->maxmr; u32 hipz_acl; struct ehca_mr_hipzout_parms hipzout; ehca_mrmw_map_acl(acl, &hipz_acl); ehca_mrmw_set_pgsize_hipz_acl(e_origmr->hwpage_size, &hipz_acl); h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr, (u64)iova_start, hipz_acl, e_pd->fw_pd, &hipzout); if (h_ret != H_SUCCESS) { ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lli " "e_origmr=%p hca_hndl=%llx mr_hndl=%llx lkey=%x", h_ret, e_origmr, shca->ipz_hca_handle.handle, e_origmr->ipz_mr_handle.handle, e_origmr->ib.ib_mr.lkey); return ehca2ib_return_code(h_ret); } /* successful registration */ e_newmr->num_kpages = e_origmr->num_kpages; e_newmr->num_hwpages = e_origmr->num_hwpages; e_newmr->hwpage_size = e_origmr->hwpage_size; e_newmr->start = iova_start; e_newmr->size = e_origmr->size; e_newmr->acl = acl; e_newmr->ipz_mr_handle = hipzout.handle; *lkey = hipzout.lkey; *rkey = hipzout.rkey; return 0; } /* end ehca_reg_maxmr() */ /*----------------------------------------------------------------------*/ int ehca_dereg_internal_maxmr(struct ehca_shca *shca) { int ret; struct ehca_mr *e_maxmr; struct ib_pd *ib_pd; if (!shca->maxmr) { ehca_err(&shca->ib_device, "bad call, shca=%p", shca); ret = -EINVAL; goto ehca_dereg_internal_maxmr_exit0; } e_maxmr = shca->maxmr; ib_pd = e_maxmr->ib.ib_mr.pd; shca->maxmr = NULL; /* remove internal max-MR indication from SHCA */ ret = ehca_dereg_mr(&e_maxmr->ib.ib_mr); if (ret) { ehca_err(&shca->ib_device, "dereg internal max-MR failed, " "ret=%i e_maxmr=%p shca=%p lkey=%x", ret, e_maxmr, shca, e_maxmr->ib.ib_mr.lkey); shca->maxmr = e_maxmr; goto ehca_dereg_internal_maxmr_exit0; } atomic_dec(&ib_pd->usecnt); ehca_dereg_internal_maxmr_exit0: if (ret) ehca_err(&shca->ib_device, "ret=%i shca=%p shca->maxmr=%p", ret, shca, shca->maxmr); return ret; } /* end ehca_dereg_internal_maxmr() */ /*----------------------------------------------------------------------*/ /* * check physical buffer array of MR verbs for validness and * calculates MR size */ int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array, int num_phys_buf, u64 *iova_start, u64 *size) { struct ib_phys_buf *pbuf = phys_buf_array; u64 size_count = 0; u32 i; if (num_phys_buf == 0) { ehca_gen_err("bad phys buf array len, num_phys_buf=0"); return -EINVAL; } /* check first buffer */ if (((u64)iova_start & ~PAGE_MASK) != (pbuf->addr & ~PAGE_MASK)) { ehca_gen_err("iova_start/addr mismatch, iova_start=%p " "pbuf->addr=%llx pbuf->size=%llx", iova_start, pbuf->addr, pbuf->size); return -EINVAL; } if (((pbuf->addr + pbuf->size) % PAGE_SIZE) && (num_phys_buf > 1)) { ehca_gen_err("addr/size mismatch in 1st buf, pbuf->addr=%llx " "pbuf->size=%llx", pbuf->addr, pbuf->size); return -EINVAL; } for (i = 0; i < num_phys_buf; i++) { if ((i > 0) && (pbuf->addr % PAGE_SIZE)) { ehca_gen_err("bad address, i=%x pbuf->addr=%llx " "pbuf->size=%llx", i, pbuf->addr, pbuf->size); return -EINVAL; } if (((i > 0) && /* not 1st */ (i < (num_phys_buf - 1)) && /* not last */ (pbuf->size % PAGE_SIZE)) || (pbuf->size == 0)) { ehca_gen_err("bad size, i=%x pbuf->size=%llx", i, pbuf->size); return -EINVAL; } size_count += pbuf->size; pbuf++; } *size = size_count; return 0; } /* end ehca_mr_chk_buf_and_calc_size() */ /*----------------------------------------------------------------------*/ /* check page list of map FMR verb for validness */ int ehca_fmr_check_page_list(struct ehca_mr *e_fmr, u64 *page_list, int list_len) { u32 i; u64 *page; if ((list_len == 0) || (list_len > e_fmr->fmr_max_pages)) { ehca_gen_err("bad list_len, list_len=%x " "e_fmr->fmr_max_pages=%x fmr=%p", list_len, e_fmr->fmr_max_pages, e_fmr); return -EINVAL; } /* each page must be aligned */ page = page_list; for (i = 0; i < list_len; i++) { if (*page % e_fmr->fmr_page_size) { ehca_gen_err("bad page, i=%x *page=%llx page=%p fmr=%p " "fmr_page_size=%x", i, *page, page, e_fmr, e_fmr->fmr_page_size); return -EINVAL; } page++; } return 0; } /* end ehca_fmr_check_page_list() */ /*----------------------------------------------------------------------*/ /* PAGE_SIZE >= pginfo->hwpage_size */ static int ehca_set_pagebuf_user1(struct ehca_mr_pginfo *pginfo, u32 number, u64 *kpage) { int ret = 0; u64 pgaddr; u32 j = 0; int hwpages_per_kpage = PAGE_SIZE / pginfo->hwpage_size; struct scatterlist **sg = &pginfo->u.usr.next_sg; while (*sg != NULL) { pgaddr = page_to_pfn(sg_page(*sg)) << PAGE_SHIFT; *kpage = pgaddr + (pginfo->next_hwpage * pginfo->hwpage_size); if (!(*kpage)) { ehca_gen_err("pgaddr=%llx " "sg_dma_address=%llx " "entry=%llx next_hwpage=%llx", pgaddr, (u64)sg_dma_address(*sg), pginfo->u.usr.next_nmap, pginfo->next_hwpage); return -EFAULT; } (pginfo->hwpage_cnt)++; (pginfo->next_hwpage)++; kpage++; if (pginfo->next_hwpage % hwpages_per_kpage == 0) { (pginfo->kpage_cnt)++; (pginfo->u.usr.next_nmap)++; pginfo->next_hwpage = 0; *sg = sg_next(*sg); } j++; if (j >= number) break; } return ret; } /* * check given pages for contiguous layout * last page addr is returned in prev_pgaddr for further check */ static int ehca_check_kpages_per_ate(struct scatterlist **sg, int num_pages, u64 *prev_pgaddr) { for (; *sg && num_pages > 0; *sg = sg_next(*sg), num_pages--) { u64 pgaddr = page_to_pfn(sg_page(*sg)) << PAGE_SHIFT; if (ehca_debug_level >= 3) ehca_gen_dbg("chunk_page=%llx value=%016llx", pgaddr, *(u64 *)__va(pgaddr)); if (pgaddr - PAGE_SIZE != *prev_pgaddr) { ehca_gen_err("uncontiguous page found pgaddr=%llx " "prev_pgaddr=%llx entries_left_in_hwpage=%x", pgaddr, *prev_pgaddr, num_pages); return -EINVAL; } *prev_pgaddr = pgaddr; } return 0; } /* PAGE_SIZE < pginfo->hwpage_size */ static int ehca_set_pagebuf_user2(struct ehca_mr_pginfo *pginfo, u32 number, u64 *kpage) { int ret = 0; u64 pgaddr, prev_pgaddr; u32 j = 0; int kpages_per_hwpage = pginfo->hwpage_size / PAGE_SIZE; int nr_kpages = kpages_per_hwpage; struct scatterlist **sg = &pginfo->u.usr.next_sg; while (*sg != NULL) { if (nr_kpages == kpages_per_hwpage) { pgaddr = (page_to_pfn(sg_page(*sg)) << PAGE_SHIFT); *kpage = pgaddr; if (!(*kpage)) { ehca_gen_err("pgaddr=%llx entry=%llx", pgaddr, pginfo->u.usr.next_nmap); ret = -EFAULT; return ret; } /* * The first page in a hwpage must be aligned; * the first MR page is exempt from this rule. */ if (pgaddr & (pginfo->hwpage_size - 1)) { if (pginfo->hwpage_cnt) { ehca_gen_err( "invalid alignment " "pgaddr=%llx entry=%llx " "mr_pgsize=%llx", pgaddr, pginfo->u.usr.next_nmap, pginfo->hwpage_size); ret = -EFAULT; return ret; } /* first MR page */ pginfo->kpage_cnt = (pgaddr & (pginfo->hwpage_size - 1)) >> PAGE_SHIFT; nr_kpages -= pginfo->kpage_cnt; *kpage = pgaddr & ~(pginfo->hwpage_size - 1); } if (ehca_debug_level >= 3) { u64 val = *(u64 *)__va(pgaddr); ehca_gen_dbg("kpage=%llx page=%llx " "value=%016llx", *kpage, pgaddr, val); } prev_pgaddr = pgaddr; *sg = sg_next(*sg); pginfo->kpage_cnt++; pginfo->u.usr.next_nmap++; nr_kpages--; if (!nr_kpages) goto next_kpage; continue; } ret = ehca_check_kpages_per_ate(sg, nr_kpages, &prev_pgaddr); if (ret) return ret; pginfo->kpage_cnt += nr_kpages; pginfo->u.usr.next_nmap += nr_kpages; next_kpage: nr_kpages = kpages_per_hwpage; (pginfo->hwpage_cnt)++; kpage++; j++; if (j >= number) break; } return ret; } static int ehca_set_pagebuf_phys(struct ehca_mr_pginfo *pginfo, u32 number, u64 *kpage) { int ret = 0; struct ib_phys_buf *pbuf; u64 num_hw, offs_hw; u32 i = 0; /* loop over desired phys_buf_array entries */ while (i < number) { pbuf = pginfo->u.phy.phys_buf_array + pginfo->u.phy.next_buf; num_hw = NUM_CHUNKS((pbuf->addr % pginfo->hwpage_size) + pbuf->size, pginfo->hwpage_size); offs_hw = (pbuf->addr & ~(pginfo->hwpage_size - 1)) / pginfo->hwpage_size; while (pginfo->next_hwpage < offs_hw + num_hw) { /* sanity check */ if ((pginfo->kpage_cnt >= pginfo->num_kpages) || (pginfo->hwpage_cnt >= pginfo->num_hwpages)) { ehca_gen_err("kpage_cnt >= num_kpages, " "kpage_cnt=%llx num_kpages=%llx " "hwpage_cnt=%llx " "num_hwpages=%llx i=%x", pginfo->kpage_cnt, pginfo->num_kpages, pginfo->hwpage_cnt, pginfo->num_hwpages, i); return -EFAULT; } *kpage = (pbuf->addr & ~(pginfo->hwpage_size - 1)) + (pginfo->next_hwpage * pginfo->hwpage_size); if ( !(*kpage) && pbuf->addr ) { ehca_gen_err("pbuf->addr=%llx pbuf->size=%llx " "next_hwpage=%llx", pbuf->addr, pbuf->size, pginfo->next_hwpage); return -EFAULT; } (pginfo->hwpage_cnt)++; (pginfo->next_hwpage)++; if (PAGE_SIZE >= pginfo->hwpage_size) { if (pginfo->next_hwpage % (PAGE_SIZE / pginfo->hwpage_size) == 0) (pginfo->kpage_cnt)++; } else pginfo->kpage_cnt += pginfo->hwpage_size / PAGE_SIZE; kpage++; i++; if (i >= number) break; } if (pginfo->next_hwpage >= offs_hw + num_hw) { (pginfo->u.phy.next_buf)++; pginfo->next_hwpage = 0; } } return ret; } static int ehca_set_pagebuf_fmr(struct ehca_mr_pginfo *pginfo, u32 number, u64 *kpage) { int ret = 0; u64 *fmrlist; u32 i; /* loop over desired page_list entries */ fmrlist = pginfo->u.fmr.page_list + pginfo->u.fmr.next_listelem; for (i = 0; i < number; i++) { *kpage = (*fmrlist & ~(pginfo->hwpage_size - 1)) + pginfo->next_hwpage * pginfo->hwpage_size; if ( !(*kpage) ) { ehca_gen_err("*fmrlist=%llx fmrlist=%p " "next_listelem=%llx next_hwpage=%llx", *fmrlist, fmrlist, pginfo->u.fmr.next_listelem, pginfo->next_hwpage); return -EFAULT; } (pginfo->hwpage_cnt)++; if (pginfo->u.fmr.fmr_pgsize >= pginfo->hwpage_size) { if (pginfo->next_hwpage % (pginfo->u.fmr.fmr_pgsize / pginfo->hwpage_size) == 0) { (pginfo->kpage_cnt)++; (pginfo->u.fmr.next_listelem)++; fmrlist++; pginfo->next_hwpage = 0; } else (pginfo->next_hwpage)++; } else { unsigned int cnt_per_hwpage = pginfo->hwpage_size / pginfo->u.fmr.fmr_pgsize; unsigned int j; u64 prev = *kpage; /* check if adrs are contiguous */ for (j = 1; j < cnt_per_hwpage; j++) { u64 p = fmrlist[j] & ~(pginfo->hwpage_size - 1); if (prev + pginfo->u.fmr.fmr_pgsize != p) { ehca_gen_err("uncontiguous fmr pages " "found prev=%llx p=%llx " "idx=%x", prev, p, i + j); return -EINVAL; } prev = p; } pginfo->kpage_cnt += cnt_per_hwpage; pginfo->u.fmr.next_listelem += cnt_per_hwpage; fmrlist += cnt_per_hwpage; } kpage++; } return ret; } /* setup page buffer from page info */ int ehca_set_pagebuf(struct ehca_mr_pginfo *pginfo, u32 number, u64 *kpage) { int ret; switch (pginfo->type) { case EHCA_MR_PGI_PHYS: ret = ehca_set_pagebuf_phys(pginfo, number, kpage); break; case EHCA_MR_PGI_USER: ret = PAGE_SIZE >= pginfo->hwpage_size ? ehca_set_pagebuf_user1(pginfo, number, kpage) : ehca_set_pagebuf_user2(pginfo, number, kpage); break; case EHCA_MR_PGI_FMR: ret = ehca_set_pagebuf_fmr(pginfo, number, kpage); break; default: ehca_gen_err("bad pginfo->type=%x", pginfo->type); ret = -EFAULT; break; } return ret; } /* end ehca_set_pagebuf() */ /*----------------------------------------------------------------------*/ /* * check MR if it is a max-MR, i.e. uses whole memory * in case it's a max-MR 1 is returned, else 0 */ int ehca_mr_is_maxmr(u64 size, u64 *iova_start) { /* a MR is treated as max-MR only if it fits following: */ if ((size == ehca_mr_len) && (iova_start == (void *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START)))) { ehca_gen_dbg("this is a max-MR"); return 1; } else return 0; } /* end ehca_mr_is_maxmr() */ /*----------------------------------------------------------------------*/ /* map access control for MR/MW. This routine is used for MR and MW. */ void ehca_mrmw_map_acl(int ib_acl, u32 *hipz_acl) { *hipz_acl = 0; if (ib_acl & IB_ACCESS_REMOTE_READ) *hipz_acl |= HIPZ_ACCESSCTRL_R_READ; if (ib_acl & IB_ACCESS_REMOTE_WRITE) *hipz_acl |= HIPZ_ACCESSCTRL_R_WRITE; if (ib_acl & IB_ACCESS_REMOTE_ATOMIC) *hipz_acl |= HIPZ_ACCESSCTRL_R_ATOMIC; if (ib_acl & IB_ACCESS_LOCAL_WRITE) *hipz_acl |= HIPZ_ACCESSCTRL_L_WRITE; if (ib_acl & IB_ACCESS_MW_BIND) *hipz_acl |= HIPZ_ACCESSCTRL_MW_BIND; } /* end ehca_mrmw_map_acl() */ /*----------------------------------------------------------------------*/ /* sets page size in hipz access control for MR/MW. */ void ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize, u32 *hipz_acl) /*INOUT*/ { *hipz_acl |= (ehca_encode_hwpage_size(pgsize) << 24); } /* end ehca_mrmw_set_pgsize_hipz_acl() */ /*----------------------------------------------------------------------*/ /* * reverse map access control for MR/MW. * This routine is used for MR and MW. */ void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl, int *ib_acl) /*OUT*/ { *ib_acl = 0; if (*hipz_acl & HIPZ_ACCESSCTRL_R_READ) *ib_acl |= IB_ACCESS_REMOTE_READ; if (*hipz_acl & HIPZ_ACCESSCTRL_R_WRITE) *ib_acl |= IB_ACCESS_REMOTE_WRITE; if (*hipz_acl & HIPZ_ACCESSCTRL_R_ATOMIC) *ib_acl |= IB_ACCESS_REMOTE_ATOMIC; if (*hipz_acl & HIPZ_ACCESSCTRL_L_WRITE) *ib_acl |= IB_ACCESS_LOCAL_WRITE; if (*hipz_acl & HIPZ_ACCESSCTRL_MW_BIND) *ib_acl |= IB_ACCESS_MW_BIND; } /* end ehca_mrmw_reverse_map_acl() */ /*----------------------------------------------------------------------*/ /* * MR destructor and constructor * used in Reregister MR verb, sets all fields in ehca_mr_t to 0, * except struct ib_mr and spinlock */ void ehca_mr_deletenew(struct ehca_mr *mr) { mr->flags = 0; mr->num_kpages = 0; mr->num_hwpages = 0; mr->acl = 0; mr->start = NULL; mr->fmr_page_size = 0; mr->fmr_max_pages = 0; mr->fmr_max_maps = 0; mr->fmr_map_cnt = 0; memset(&mr->ipz_mr_handle, 0, sizeof(mr->ipz_mr_handle)); memset(&mr->galpas, 0, sizeof(mr->galpas)); } /* end ehca_mr_deletenew() */ int ehca_init_mrmw_cache(void) { mr_cache = kmem_cache_create("ehca_cache_mr", sizeof(struct ehca_mr), 0, SLAB_HWCACHE_ALIGN, NULL); if (!mr_cache) return -ENOMEM; mw_cache = kmem_cache_create("ehca_cache_mw", sizeof(struct ehca_mw), 0, SLAB_HWCACHE_ALIGN, NULL); if (!mw_cache) { kmem_cache_destroy(mr_cache); mr_cache = NULL; return -ENOMEM; } return 0; } void ehca_cleanup_mrmw_cache(void) { if (mr_cache) kmem_cache_destroy(mr_cache); if (mw_cache) kmem_cache_destroy(mw_cache); } static inline int ehca_init_top_bmap(struct ehca_top_bmap *ehca_top_bmap, int dir) { if (!ehca_bmap_valid(ehca_top_bmap->dir[dir])) { ehca_top_bmap->dir[dir] = kmalloc(sizeof(struct ehca_dir_bmap), GFP_KERNEL); if (!ehca_top_bmap->dir[dir]) return -ENOMEM; /* Set map block to 0xFF according to EHCA_INVAL_ADDR */ memset(ehca_top_bmap->dir[dir], 0xFF, EHCA_ENT_MAP_SIZE); } return 0; } static inline int ehca_init_bmap(struct ehca_bmap *ehca_bmap, int top, int dir) { if (!ehca_bmap_valid(ehca_bmap->top[top])) { ehca_bmap->top[top] = kmalloc(sizeof(struct ehca_top_bmap), GFP_KERNEL); if (!ehca_bmap->top[top]) return -ENOMEM; /* Set map block to 0xFF according to EHCA_INVAL_ADDR */ memset(ehca_bmap->top[top], 0xFF, EHCA_DIR_MAP_SIZE); } return ehca_init_top_bmap(ehca_bmap->top[top], dir); } static inline int ehca_calc_index(unsigned long i, unsigned long s) { return (i >> s) & EHCA_INDEX_MASK; } void ehca_destroy_busmap(void) { int top, dir; if (!ehca_bmap) return; for (top = 0; top < EHCA_MAP_ENTRIES; top++) { if (!ehca_bmap_valid(ehca_bmap->top[top])) continue; for (dir = 0; dir < EHCA_MAP_ENTRIES; dir++) { if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir])) continue; kfree(ehca_bmap->top[top]->dir[dir]); } kfree(ehca_bmap->top[top]); } kfree(ehca_bmap); ehca_bmap = NULL; } static int ehca_update_busmap(unsigned long pfn, unsigned long nr_pages) { unsigned long i, start_section, end_section; int top, dir, idx; if (!nr_pages) return 0; if (!ehca_bmap) { ehca_bmap = kmalloc(sizeof(struct ehca_bmap), GFP_KERNEL); if (!ehca_bmap) return -ENOMEM; /* Set map block to 0xFF according to EHCA_INVAL_ADDR */ memset(ehca_bmap, 0xFF, EHCA_TOP_MAP_SIZE); } start_section = (pfn * PAGE_SIZE) / EHCA_SECTSIZE; end_section = ((pfn + nr_pages) * PAGE_SIZE) / EHCA_SECTSIZE; for (i = start_section; i < end_section; i++) { int ret; top = ehca_calc_index(i, EHCA_TOP_INDEX_SHIFT); dir = ehca_calc_index(i, EHCA_DIR_INDEX_SHIFT); idx = i & EHCA_INDEX_MASK; ret = ehca_init_bmap(ehca_bmap, top, dir); if (ret) { ehca_destroy_busmap(); return ret; } ehca_bmap->top[top]->dir[dir]->ent[idx] = ehca_mr_len; ehca_mr_len += EHCA_SECTSIZE; } return 0; } static int ehca_is_hugepage(unsigned long pfn) { int page_order; if (pfn & EHCA_HUGEPAGE_PFN_MASK) return 0; page_order = compound_order(pfn_to_page(pfn)); if (page_order + PAGE_SHIFT != EHCA_HUGEPAGESHIFT) return 0; return 1; } static int ehca_create_busmap_callback(unsigned long initial_pfn, unsigned long total_nr_pages, void *arg) { int ret; unsigned long pfn, start_pfn, end_pfn, nr_pages; if ((total_nr_pages * PAGE_SIZE) < EHCA_HUGEPAGE_SIZE) return ehca_update_busmap(initial_pfn, total_nr_pages); /* Given chunk is >= 16GB -> check for hugepages */ start_pfn = initial_pfn; end_pfn = initial_pfn + total_nr_pages; pfn = start_pfn; while (pfn < end_pfn) { if (ehca_is_hugepage(pfn)) { /* Add mem found in front of the hugepage */ nr_pages = pfn - start_pfn; ret = ehca_update_busmap(start_pfn, nr_pages); if (ret) return ret; /* Skip the hugepage */ pfn += (EHCA_HUGEPAGE_SIZE / PAGE_SIZE); start_pfn = pfn; } else pfn += (EHCA_SECTSIZE / PAGE_SIZE); } /* Add mem found behind the hugepage(s) */ nr_pages = pfn - start_pfn; return ehca_update_busmap(start_pfn, nr_pages); } int ehca_create_busmap(void) { int ret; ehca_mr_len = 0; ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL, ehca_create_busmap_callback); return ret; } static int ehca_reg_bmap_mr_rpages(struct ehca_shca *shca, struct ehca_mr *e_mr, struct ehca_mr_pginfo *pginfo) { int top; u64 hret, *kpage; kpage = ehca_alloc_fw_ctrlblock(GFP_KERNEL); if (!kpage) { ehca_err(&shca->ib_device, "kpage alloc failed"); return -ENOMEM; } for (top = 0; top < EHCA_MAP_ENTRIES; top++) { if (!ehca_bmap_valid(ehca_bmap->top[top])) continue; hret = ehca_reg_mr_dir_sections(top, kpage, shca, e_mr, pginfo); if ((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS)) break; } ehca_free_fw_ctrlblock(kpage); if (hret == H_SUCCESS) return 0; /* Everything is fine */ else { ehca_err(&shca->ib_device, "ehca_reg_bmap_mr_rpages failed, " "h_ret=%lli e_mr=%p top=%x lkey=%x " "hca_hndl=%llx mr_hndl=%llx", hret, e_mr, top, e_mr->ib.ib_mr.lkey, shca->ipz_hca_handle.handle, e_mr->ipz_mr_handle.handle); return ehca2ib_return_code(hret); } } static u64 ehca_map_vaddr(void *caddr) { int top, dir, idx; unsigned long abs_addr, offset; u64 entry; if (!ehca_bmap) return EHCA_INVAL_ADDR; abs_addr = __pa(caddr); top = ehca_calc_index(abs_addr, EHCA_TOP_INDEX_SHIFT + EHCA_SECTSHIFT); if (!ehca_bmap_valid(ehca_bmap->top[top])) return EHCA_INVAL_ADDR; dir = ehca_calc_index(abs_addr, EHCA_DIR_INDEX_SHIFT + EHCA_SECTSHIFT); if (!ehca_bmap_valid(ehca_bmap->top[top]->dir[dir])) return EHCA_INVAL_ADDR; idx = ehca_calc_index(abs_addr, EHCA_SECTSHIFT); entry = ehca_bmap->top[top]->dir[dir]->ent[idx]; if (ehca_bmap_valid(entry)) { offset = (unsigned long)caddr & (EHCA_SECTSIZE - 1); return entry | offset; } else return EHCA_INVAL_ADDR; } static int ehca_dma_mapping_error(struct ib_device *dev, u64 dma_addr) { return dma_addr == EHCA_INVAL_ADDR; } static u64 ehca_dma_map_single(struct ib_device *dev, void *cpu_addr, size_t size, enum dma_data_direction direction) { if (cpu_addr) return ehca_map_vaddr(cpu_addr); else return EHCA_INVAL_ADDR; } static void ehca_dma_unmap_single(struct ib_device *dev, u64 addr, size_t size, enum dma_data_direction direction) { /* This is only a stub; nothing to be done here */ } static u64 ehca_dma_map_page(struct ib_device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction direction) { u64 addr; if (offset + size > PAGE_SIZE) return EHCA_INVAL_ADDR; addr = ehca_map_vaddr(page_address(page)); if (!ehca_dma_mapping_error(dev, addr)) addr += offset; return addr; } static void ehca_dma_unmap_page(struct ib_device *dev, u64 addr, size_t size, enum dma_data_direction direction) { /* This is only a stub; nothing to be done here */ } static int ehca_dma_map_sg(struct ib_device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction) { struct scatterlist *sg; int i; for_each_sg(sgl, sg, nents, i) { u64 addr; addr = ehca_map_vaddr(sg_virt(sg)); if (ehca_dma_mapping_error(dev, addr)) return 0; sg->dma_address = addr; sg->dma_length = sg->length; } return nents; } static void ehca_dma_unmap_sg(struct ib_device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction) { /* This is only a stub; nothing to be done here */ } static u64 ehca_dma_address(struct ib_device *dev, struct scatterlist *sg) { return sg->dma_address; } static unsigned int ehca_dma_len(struct ib_device *dev, struct scatterlist *sg) { return sg->length; } static void ehca_dma_sync_single_for_cpu(struct ib_device *dev, u64 addr, size_t size, enum dma_data_direction dir) { dma_sync_single_for_cpu(dev->dma_device, addr, size, dir); } static void ehca_dma_sync_single_for_device(struct ib_device *dev, u64 addr, size_t size, enum dma_data_direction dir) { dma_sync_single_for_device(dev->dma_device, addr, size, dir); } static void *ehca_dma_alloc_coherent(struct ib_device *dev, size_t size, u64 *dma_handle, gfp_t flag) { struct page *p; void *addr = NULL; u64 dma_addr; p = alloc_pages(flag, get_order(size)); if (p) { addr = page_address(p); dma_addr = ehca_map_vaddr(addr); if (ehca_dma_mapping_error(dev, dma_addr)) { free_pages((unsigned long)addr, get_order(size)); return NULL; } if (dma_handle) *dma_handle = dma_addr; return addr; } return NULL; } static void ehca_dma_free_coherent(struct ib_device *dev, size_t size, void *cpu_addr, u64 dma_handle) { if (cpu_addr && size) free_pages((unsigned long)cpu_addr, get_order(size)); } struct ib_dma_mapping_ops ehca_dma_mapping_ops = { .mapping_error = ehca_dma_mapping_error, .map_single = ehca_dma_map_single, .unmap_single = ehca_dma_unmap_single, .map_page = ehca_dma_map_page, .unmap_page = ehca_dma_unmap_page, .map_sg = ehca_dma_map_sg, .unmap_sg = ehca_dma_unmap_sg, .dma_address = ehca_dma_address, .dma_len = ehca_dma_len, .sync_single_for_cpu = ehca_dma_sync_single_for_cpu, .sync_single_for_device = ehca_dma_sync_single_for_device, .alloc_coherent = ehca_dma_alloc_coherent, .free_coherent = ehca_dma_free_coherent, };