From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/infiniband/hw/mthca/mthca_memfree.c | 465 ++++++++++++++++++++++++++++ 1 file changed, 465 insertions(+) create mode 100644 drivers/infiniband/hw/mthca/mthca_memfree.c (limited to 'drivers/infiniband/hw/mthca/mthca_memfree.c') diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c new file mode 100644 index 000000000000..7730b5960616 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_memfree.c @@ -0,0 +1,465 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * 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. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * $Id$ + */ + +#include "mthca_memfree.h" +#include "mthca_dev.h" +#include "mthca_cmd.h" + +/* + * We allocate in as big chunks as we can, up to a maximum of 256 KB + * per chunk. + */ +enum { + MTHCA_ICM_ALLOC_SIZE = 1 << 18, + MTHCA_TABLE_CHUNK_SIZE = 1 << 18 +}; + +void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm) +{ + struct mthca_icm_chunk *chunk, *tmp; + int i; + + if (!icm) + return; + + list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) { + if (chunk->nsg > 0) + pci_unmap_sg(dev->pdev, chunk->mem, chunk->npages, + PCI_DMA_BIDIRECTIONAL); + + for (i = 0; i < chunk->npages; ++i) + __free_pages(chunk->mem[i].page, + get_order(chunk->mem[i].length)); + + kfree(chunk); + } + + kfree(icm); +} + +struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages, + unsigned int gfp_mask) +{ + struct mthca_icm *icm; + struct mthca_icm_chunk *chunk = NULL; + int cur_order; + + icm = kmalloc(sizeof *icm, gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN)); + if (!icm) + return icm; + + icm->refcount = 0; + INIT_LIST_HEAD(&icm->chunk_list); + + cur_order = get_order(MTHCA_ICM_ALLOC_SIZE); + + while (npages > 0) { + if (!chunk) { + chunk = kmalloc(sizeof *chunk, + gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN)); + if (!chunk) + goto fail; + + chunk->npages = 0; + chunk->nsg = 0; + list_add_tail(&chunk->list, &icm->chunk_list); + } + + while (1 << cur_order > npages) + --cur_order; + + chunk->mem[chunk->npages].page = alloc_pages(gfp_mask, cur_order); + if (chunk->mem[chunk->npages].page) { + chunk->mem[chunk->npages].length = PAGE_SIZE << cur_order; + chunk->mem[chunk->npages].offset = 0; + + if (++chunk->npages == MTHCA_ICM_CHUNK_LEN) { + chunk->nsg = pci_map_sg(dev->pdev, chunk->mem, + chunk->npages, + PCI_DMA_BIDIRECTIONAL); + + if (chunk->nsg <= 0) + goto fail; + + chunk = NULL; + } + + npages -= 1 << cur_order; + } else { + --cur_order; + if (cur_order < 0) + goto fail; + } + } + + if (chunk) { + chunk->nsg = pci_map_sg(dev->pdev, chunk->mem, + chunk->npages, + PCI_DMA_BIDIRECTIONAL); + + if (chunk->nsg <= 0) + goto fail; + } + + return icm; + +fail: + mthca_free_icm(dev, icm); + return NULL; +} + +int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj) +{ + int i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE; + int ret = 0; + u8 status; + + down(&table->mutex); + + if (table->icm[i]) { + ++table->icm[i]->refcount; + goto out; + } + + table->icm[i] = mthca_alloc_icm(dev, MTHCA_TABLE_CHUNK_SIZE >> PAGE_SHIFT, + (table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) | + __GFP_NOWARN); + if (!table->icm[i]) { + ret = -ENOMEM; + goto out; + } + + if (mthca_MAP_ICM(dev, table->icm[i], table->virt + i * MTHCA_TABLE_CHUNK_SIZE, + &status) || status) { + mthca_free_icm(dev, table->icm[i]); + table->icm[i] = NULL; + ret = -ENOMEM; + goto out; + } + + ++table->icm[i]->refcount; + +out: + up(&table->mutex); + return ret; +} + +void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj) +{ + int i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE; + u8 status; + + down(&table->mutex); + + if (--table->icm[i]->refcount == 0) { + mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE, + MTHCA_TABLE_CHUNK_SIZE >> 12, &status); + mthca_free_icm(dev, table->icm[i]); + table->icm[i] = NULL; + } + + up(&table->mutex); +} + +struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev, + u64 virt, int obj_size, + int nobj, int reserved, + int use_lowmem) +{ + struct mthca_icm_table *table; + int num_icm; + int i; + u8 status; + + num_icm = obj_size * nobj / MTHCA_TABLE_CHUNK_SIZE; + + table = kmalloc(sizeof *table + num_icm * sizeof *table->icm, GFP_KERNEL); + if (!table) + return NULL; + + table->virt = virt; + table->num_icm = num_icm; + table->num_obj = nobj; + table->obj_size = obj_size; + table->lowmem = use_lowmem; + init_MUTEX(&table->mutex); + + for (i = 0; i < num_icm; ++i) + table->icm[i] = NULL; + + for (i = 0; i * MTHCA_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) { + table->icm[i] = mthca_alloc_icm(dev, MTHCA_TABLE_CHUNK_SIZE >> PAGE_SHIFT, + (use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) | + __GFP_NOWARN); + if (!table->icm[i]) + goto err; + if (mthca_MAP_ICM(dev, table->icm[i], virt + i * MTHCA_TABLE_CHUNK_SIZE, + &status) || status) { + mthca_free_icm(dev, table->icm[i]); + table->icm[i] = NULL; + goto err; + } + + /* + * Add a reference to this ICM chunk so that it never + * gets freed (since it contains reserved firmware objects). + */ + ++table->icm[i]->refcount; + } + + return table; + +err: + for (i = 0; i < num_icm; ++i) + if (table->icm[i]) { + mthca_UNMAP_ICM(dev, virt + i * MTHCA_TABLE_CHUNK_SIZE, + MTHCA_TABLE_CHUNK_SIZE >> 12, &status); + mthca_free_icm(dev, table->icm[i]); + } + + kfree(table); + + return NULL; +} + +void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table) +{ + int i; + u8 status; + + for (i = 0; i < table->num_icm; ++i) + if (table->icm[i]) { + mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE, + MTHCA_TABLE_CHUNK_SIZE >> 12, &status); + mthca_free_icm(dev, table->icm[i]); + } + + kfree(table); +} + +static u64 mthca_uarc_virt(struct mthca_dev *dev, int page) +{ + return dev->uar_table.uarc_base + + dev->driver_uar.index * dev->uar_table.uarc_size + + page * 4096; +} + +int mthca_alloc_db(struct mthca_dev *dev, int type, u32 qn, u32 **db) +{ + int group; + int start, end, dir; + int i, j; + struct mthca_db_page *page; + int ret = 0; + u8 status; + + down(&dev->db_tab->mutex); + + switch (type) { + case MTHCA_DB_TYPE_CQ_ARM: + case MTHCA_DB_TYPE_SQ: + group = 0; + start = 0; + end = dev->db_tab->max_group1; + dir = 1; + break; + + case MTHCA_DB_TYPE_CQ_SET_CI: + case MTHCA_DB_TYPE_RQ: + case MTHCA_DB_TYPE_SRQ: + group = 1; + start = dev->db_tab->npages - 1; + end = dev->db_tab->min_group2; + dir = -1; + break; + + default: + return -1; + } + + for (i = start; i != end; i += dir) + if (dev->db_tab->page[i].db_rec && + !bitmap_full(dev->db_tab->page[i].used, + MTHCA_DB_REC_PER_PAGE)) { + page = dev->db_tab->page + i; + goto found; + } + + if (dev->db_tab->max_group1 >= dev->db_tab->min_group2 - 1) { + ret = -ENOMEM; + goto out; + } + + page = dev->db_tab->page + end; + page->db_rec = dma_alloc_coherent(&dev->pdev->dev, 4096, + &page->mapping, GFP_KERNEL); + if (!page->db_rec) { + ret = -ENOMEM; + goto out; + } + memset(page->db_rec, 0, 4096); + + ret = mthca_MAP_ICM_page(dev, page->mapping, mthca_uarc_virt(dev, i), &status); + if (!ret && status) + ret = -EINVAL; + if (ret) { + dma_free_coherent(&dev->pdev->dev, 4096, + page->db_rec, page->mapping); + goto out; + } + + bitmap_zero(page->used, MTHCA_DB_REC_PER_PAGE); + if (group == 0) + ++dev->db_tab->max_group1; + else + --dev->db_tab->min_group2; + +found: + j = find_first_zero_bit(page->used, MTHCA_DB_REC_PER_PAGE); + set_bit(j, page->used); + + if (group == 1) + j = MTHCA_DB_REC_PER_PAGE - 1 - j; + + ret = i * MTHCA_DB_REC_PER_PAGE + j; + + page->db_rec[j] = cpu_to_be64((qn << 8) | (type << 5)); + + *db = (u32 *) &page->db_rec[j]; + +out: + up(&dev->db_tab->mutex); + + return ret; +} + +void mthca_free_db(struct mthca_dev *dev, int type, int db_index) +{ + int i, j; + struct mthca_db_page *page; + u8 status; + + i = db_index / MTHCA_DB_REC_PER_PAGE; + j = db_index % MTHCA_DB_REC_PER_PAGE; + + page = dev->db_tab->page + i; + + down(&dev->db_tab->mutex); + + page->db_rec[j] = 0; + if (i >= dev->db_tab->min_group2) + j = MTHCA_DB_REC_PER_PAGE - 1 - j; + clear_bit(j, page->used); + + if (bitmap_empty(page->used, MTHCA_DB_REC_PER_PAGE) && + i >= dev->db_tab->max_group1 - 1) { + mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, i), 1, &status); + + dma_free_coherent(&dev->pdev->dev, 4096, + page->db_rec, page->mapping); + page->db_rec = NULL; + + if (i == dev->db_tab->max_group1) { + --dev->db_tab->max_group1; + /* XXX may be able to unmap more pages now */ + } + if (i == dev->db_tab->min_group2) + ++dev->db_tab->min_group2; + } + + up(&dev->db_tab->mutex); +} + +int mthca_init_db_tab(struct mthca_dev *dev) +{ + int i; + + if (dev->hca_type != ARBEL_NATIVE) + return 0; + + dev->db_tab = kmalloc(sizeof *dev->db_tab, GFP_KERNEL); + if (!dev->db_tab) + return -ENOMEM; + + init_MUTEX(&dev->db_tab->mutex); + + dev->db_tab->npages = dev->uar_table.uarc_size / PAGE_SIZE; + dev->db_tab->max_group1 = 0; + dev->db_tab->min_group2 = dev->db_tab->npages - 1; + + dev->db_tab->page = kmalloc(dev->db_tab->npages * + sizeof *dev->db_tab->page, + GFP_KERNEL); + if (!dev->db_tab->page) { + kfree(dev->db_tab); + return -ENOMEM; + } + + for (i = 0; i < dev->db_tab->npages; ++i) + dev->db_tab->page[i].db_rec = NULL; + + return 0; +} + +void mthca_cleanup_db_tab(struct mthca_dev *dev) +{ + int i; + u8 status; + + if (dev->hca_type != ARBEL_NATIVE) + return; + + /* + * Because we don't always free our UARC pages when they + * become empty to make mthca_free_db() simpler we need to + * make a sweep through the doorbell pages and free any + * leftover pages now. + */ + for (i = 0; i < dev->db_tab->npages; ++i) { + if (!dev->db_tab->page[i].db_rec) + continue; + + if (!bitmap_empty(dev->db_tab->page[i].used, MTHCA_DB_REC_PER_PAGE)) + mthca_warn(dev, "Kernel UARC page %d not empty\n", i); + + mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, i), 1, &status); + + dma_free_coherent(&dev->pdev->dev, 4096, + dev->db_tab->page[i].db_rec, + dev->db_tab->page[i].mapping); + } + + kfree(dev->db_tab->page); + kfree(dev->db_tab); +} -- cgit v1.2.3