i40iw_pble.[ch] to manage pble resource for iwarp clients.
Acked-by: Anjali Singhai Jain <anjali.sing...@intel.com>
Acked-by: Shannon Nelson <shannon.nel...@intel.com>
Signed-off-by: Faisal Latif <faisal.la...@intel.com>
---
drivers/infiniband/hw/i40iw/i40iw_pble.c | 618 +++++++++++++++++++++++++++++++
drivers/infiniband/hw/i40iw/i40iw_pble.h | 131 +++++++
2 files changed, 749 insertions(+)
create mode 100644 drivers/infiniband/hw/i40iw/i40iw_pble.c
create mode 100644 drivers/infiniband/hw/i40iw/i40iw_pble.h
diff --git a/drivers/infiniband/hw/i40iw/i40iw_pble.c
b/drivers/infiniband/hw/i40iw/i40iw_pble.c
new file mode 100644
index 0000000..217997e
--- /dev/null
+++ b/drivers/infiniband/hw/i40iw/i40iw_pble.c
@@ -0,0 +1,618 @@
+/*******************************************************************************
+*
+* Copyright (c) 2015 Intel Corporation. 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
+* OpenFabrics.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.
+*
+*******************************************************************************/
+
+#include "i40iw_status.h"
+#include "i40iw_osdep.h"
+#include "i40iw_register.h"
+#include "i40iw_hmc.h"
+
+#include "i40iw_d.h"
+#include "i40iw_type.h"
+#include "i40iw_p.h"
+
+#include <linux/pci.h>
+#include <linux/genalloc.h>
+#include <linux/vmalloc.h>
+#include "i40iw_pble.h"
+#include "i40iw.h"
+
+struct i40iw_device;
+static enum i40iw_status_code add_pble_pool(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc
*pble_rsrc);
+static void i40iw_free_vmalloc_mem(struct i40iw_hw *hw, struct i40iw_chunk
*chunk);
+
+/**
+ * i40iw_destroy_pble_pool - destroy pool during module unload
+ * @pble_rsrc: pble resources
+ */
+void i40iw_destroy_pble_pool(struct i40iw_sc_dev *dev, struct
i40iw_hmc_pble_rsrc *pble_rsrc)
+{
+ struct list_head *clist;
+ struct list_head *tlist;
+ struct i40iw_chunk *chunk;
+ struct i40iw_pble_pool *pinfo = &pble_rsrc->pinfo;
+
+ if (pinfo->pool) {
+ list_for_each_safe(clist, tlist, &pinfo->clist) {
+ chunk = list_entry(clist, struct i40iw_chunk, list);
+ if (chunk->type == I40IW_VMALLOC)
+ i40iw_free_vmalloc_mem(dev->hw, chunk);
+ kfree(chunk);
+ }
+ gen_pool_destroy(pinfo->pool);
+ }
+}
+
+/**
+ * i40iw_hmc_init_pble - Initialize pble resources during module load
+ * @dev: i40iw_sc_dev struct
+ * @pble_rsrc: pble resources
+ */
+enum i40iw_status_code i40iw_hmc_init_pble(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc
*pble_rsrc)
+{
+ struct i40iw_hmc_info *hmc_info;
+ u32 fpm_idx = 0;
+
+ hmc_info = dev->hmc_info;
+ pble_rsrc->fpm_base_addr = hmc_info->hmc_obj[I40IW_HMC_IW_PBLE].base;
+ /* Now start the pble' on 4k boundary */
+ if (pble_rsrc->fpm_base_addr & 0xfff)
+ fpm_idx = (PAGE_SIZE - (pble_rsrc->fpm_base_addr & 0xfff)) >> 3;
+
+ pble_rsrc->unallocated_pble =
+ hmc_info->hmc_obj[I40IW_HMC_IW_PBLE].cnt - fpm_idx;
+ pble_rsrc->next_fpm_addr = pble_rsrc->fpm_base_addr + (fpm_idx << 3);
+
+ pble_rsrc->pinfo.pool_shift = POOL_SHIFT;
+ pble_rsrc->pinfo.pool = gen_pool_create(pble_rsrc->pinfo.pool_shift,
-1);
+ INIT_LIST_HEAD(&pble_rsrc->pinfo.clist);
+ if (!pble_rsrc->pinfo.pool)
+ goto error;
+
+ if (add_pble_pool(dev, pble_rsrc))
+ goto error;
+
+ return 0;
+
+ error:i40iw_destroy_pble_pool(dev, pble_rsrc);
+ return I40IW_ERR_NO_MEMORY;
+}
+
+/**
+ * get_sd_pd_idx - Returns sd index, pd index and rel_pd_idx from fpm address
+ * @ pble_rsrc: structure containing fpm address
+ * @ idx: where to return indexes
+ */
+static inline void get_sd_pd_idx(struct i40iw_hmc_pble_rsrc *pble_rsrc,
+ struct sd_pd_idx *idx)
+{
+ idx->sd_idx = (u32)(pble_rsrc->next_fpm_addr) /
I40IW_HMC_DIRECT_BP_SIZE;
+ idx->pd_idx = (u32)(pble_rsrc->next_fpm_addr) / I40IW_HMC_PAGED_BP_SIZE;
+ idx->rel_pd_idx = (idx->pd_idx % I40IW_HMC_PD_CNT_IN_SD);
+}
+
+/**
+ * add_sd_direct - add sd direct for pble
+ * @dev: hardware control device structure
+ * @pble_rsrc: pble resource ptr
+ * @info: page info for sd
+ */
+static enum i40iw_status_code add_sd_direct(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc
*pble_rsrc,
+ struct i40iw_add_page_info *info)
+{
+ enum i40iw_status_code ret_code = 0;
+ struct sd_pd_idx *idx = &info->idx;
+ struct i40iw_chunk *chunk = info->chunk;
+ struct i40iw_hmc_info *hmc_info = info->hmc_info;
+ struct i40iw_hmc_sd_entry *sd_entry = info->sd_entry;
+ u32 offset = 0;
+
+ if (!sd_entry->valid) {
+ if (dev->is_pf) {
+ ret_code = i40iw_add_sd_table_entry(dev->hw, hmc_info,
+ info->idx.sd_idx,
+
I40IW_SD_TYPE_DIRECT,
+
I40IW_HMC_DIRECT_BP_SIZE);
+ if (ret_code)
+ return ret_code;
+ chunk->type = I40IW_DMA_COHERENT;
+ }
+ }
+ offset = idx->rel_pd_idx << I40IW_HMC_PAGED_BP_SHIFT;
+ chunk->size = info->pages << I40IW_HMC_PAGED_BP_SHIFT;
+ chunk->vaddr = ((u8 *)sd_entry->u.bp.addr.va + offset);
+ chunk->fpm_addr = pble_rsrc->next_fpm_addr;
+ i40iw_debug(dev, I40IW_DEBUG_PBLE, "chunk_size[%d] = 0x%x vaddr=%p
fpm_addr = %llx\n",
+ chunk->size, chunk->size, chunk->vaddr, chunk->fpm_addr);
+ return 0;
+}
+
+/**
+ * i40iw_free_vmalloc_mem - free vmalloc during close
+ * @hw: hw struct
+ * @chunk: chunk information for vmalloc
+ */
+static void i40iw_free_vmalloc_mem(struct i40iw_hw *hw, struct i40iw_chunk
*chunk)
+{
+ struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
+ int i;
+
+ if (!chunk->pg_cnt)
+ goto done;
+ for (i = 0; i < chunk->pg_cnt; i++)
+ dma_unmap_page(&pcidev->dev, chunk->dmaaddrs[i], PAGE_SIZE,
DMA_BIDIRECTIONAL);
+
+ done:
+ kfree(chunk->dmaaddrs);
+ chunk->dmaaddrs = NULL;
+ vfree(chunk->vaddr);
+ chunk->vaddr = NULL;
+ chunk->type = 0;
+}
+
+/**
+ * i40iw_get_vmalloc_mem - get 2M page for sd
+ * @hw: hardware address
+ * @chunk: chunk to adf
+ * @pg_cnt: #of 4 K pages
+ */
+static enum i40iw_status_code i40iw_get_vmalloc_mem(struct i40iw_hw *hw,
+ struct i40iw_chunk *chunk,
+ int pg_cnt)
+{
+ struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
+ struct page *page;
+ u8 *addr = NULL;
+ u32 size;
+ int i;
+
+ chunk->dmaaddrs = kzalloc(pg_cnt << 3, GFP_KERNEL);
+ if (!chunk->dmaaddrs)
+ return I40IW_ERR_NO_MEMORY;
+ size = PAGE_SIZE * pg_cnt;
+ chunk->vaddr = vmalloc(size);
+ if (!chunk->vaddr) {
+ kfree(chunk->dmaaddrs);
+ chunk->dmaaddrs = NULL;
+ return I40IW_ERR_NO_MEMORY;
+ }
+ chunk->size = size;
+ addr = (u8 *)chunk->vaddr;
+ for (i = 0; i < pg_cnt; i++) {
+ page = vmalloc_to_page((void *)addr);
+ if (!page)
+ break;
+ chunk->dmaaddrs[i] = dma_map_page(&pcidev->dev, page, 0,
+ PAGE_SIZE, DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(&pcidev->dev, chunk->dmaaddrs[i]))
+ break;
+ addr += PAGE_SIZE;
+ }
+
+ chunk->pg_cnt = i;
+ chunk->type = I40IW_VMALLOC;
+ if (i == pg_cnt)
+ return 0;
+
+ i40iw_free_vmalloc_mem(hw, chunk);
+ return I40IW_ERR_NO_MEMORY;
+}
+
+/**
+ * fpm_to_idx - given fpm address, get pble index
+ * @pble_rsrc: pble resource management
+ * @addr: fpm address for index
+ */
+static inline u32 fpm_to_idx(struct i40iw_hmc_pble_rsrc *pble_rsrc, u64 addr)
+{
+ return (addr - (pble_rsrc->fpm_base_addr)) >> 3;
+}
+
+/**
+ * add_bp_pages - add backing pages for sd
+ * @dev: hardware control device structure
+ * @pble_rsrc: pble resource management
+ * @info: page info for sd
+ */
+static enum i40iw_status_code add_bp_pages(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc
*pble_rsrc,
+ struct i40iw_add_page_info *info)
+{
+ u8 *addr = NULL;
+ struct i40iw_dma_mem mem;
+ struct i40iw_hmc_pd_entry *pd_entry = NULL;
+ struct i40iw_hmc_sd_entry *sd_entry = info->sd_entry;
+ struct i40iw_hmc_info *hmc_info = info->hmc_info;
+ struct i40iw_chunk *chunk = info->chunk;
+ struct i40iw_manage_vf_pble_info vf_pble_info;
+ enum i40iw_status_code status = 0;
+ u32 rel_pd_idx = info->idx.rel_pd_idx;
+ u32 pd_idx = info->idx.pd_idx;
+ u32 i;
+
+ status = i40iw_get_vmalloc_mem(dev->hw, chunk, info->pages);
+ if (status)
+ return I40IW_ERR_NO_MEMORY;
+ status = i40iw_add_sd_table_entry(dev->hw, hmc_info,
+ info->idx.sd_idx, I40IW_SD_TYPE_PAGED,
+ I40IW_HMC_DIRECT_BP_SIZE);
+ if (status) {
+ i40iw_free_vmalloc_mem(dev->hw, chunk);
+ return status;
+ }
+ if (!dev->is_pf) {
+ status = i40iw_vchnl_vf_add_hmc_objs(dev, I40IW_HMC_IW_PBLE,
+ fpm_to_idx(pble_rsrc,
+
pble_rsrc->next_fpm_addr),
+ (info->pages <<
PBLE_512_SHIFT));
+ if (status) {
+ i40iw_pr_err("allocate PBLEs in the PF. Error %i\n",
status);
+ i40iw_free_vmalloc_mem(dev->hw, chunk);
+ return status;
+ }
+ }
+ addr = chunk->vaddr;
+ for (i = 0; i < info->pages; i++) {
+ mem.pa = chunk->dmaaddrs[i];
+ mem.size = PAGE_SIZE;
+ mem.va = (void *)(addr);
+ pd_entry = &sd_entry->u.pd_table.pd_entry[rel_pd_idx++];
+ if (!pd_entry->valid) {
+ status = i40iw_add_pd_table_entry(dev->hw, hmc_info,
pd_idx++, &mem);
+ if (status)
+ goto error;
+ addr += PAGE_SIZE;
+ } else {
+ i40iw_pr_err("pd entry is valid expecting to be
invalid\n");
+ }
+ }
+ if (!dev->is_pf) {
+ vf_pble_info.first_pd_index = info->idx.rel_pd_idx;
+ vf_pble_info.inv_pd_ent = false;
+ vf_pble_info.pd_entry_cnt = PBLE_PER_PAGE;
+ vf_pble_info.pd_pl_pba = sd_entry->u.pd_table.pd_page_addr.pa;
+ vf_pble_info.sd_index = info->idx.sd_idx;
+ status = i40iw_hw_manage_vf_pble_bp(dev->back_dev,
+ &vf_pble_info, true);
+ if (status) {
+ i40iw_pr_err("CQP manage VF PBLE BP failed. %i\n",
status);
+ goto error;
+ }
+ }
+ chunk->fpm_addr = pble_rsrc->next_fpm_addr;
+ return 0;
+error:
+ i40iw_free_vmalloc_mem(dev->hw, chunk);
+ return status;
+}
+
+/**
+ * add_pble_pool - add a sd entry for pble resoure
+ * @dev: hardware control device structure
+ * @pble_rsrc: pble resource management
+ */
+static enum i40iw_status_code add_pble_pool(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc
*pble_rsrc)
+{
+ struct i40iw_hmc_sd_entry *sd_entry = NULL;
+ struct i40iw_hmc_info *hmc_info;
+ struct i40iw_chunk *chunk = NULL;
+ struct i40iw_add_page_info info;
+ struct sd_pd_idx *idx = &info.idx;
+ enum i40iw_status_code ret_code = 0;
+ enum i40iw_sd_entry_type sd_entry_type;
+ u64 sd_reg_val = 0;
+ u32 pages;
+
+ if (pble_rsrc->unallocated_pble < PBLE_PER_PAGE)
+ return I40IW_ERR_NO_MEMORY;
+ if (pble_rsrc->next_fpm_addr & 0xfff) {
+ i40iw_pr_err("next fpm_addr %llx\n", pble_rsrc->next_fpm_addr);
+ return I40IW_ERR_INVALID_PAGE_DESC_INDEX;
+ }
+ chunk = kzalloc(sizeof(*chunk), GFP_KERNEL);
+ if (!chunk)
+ return I40IW_ERR_NO_MEMORY;
+ hmc_info = dev->hmc_info;
+ chunk->fpm_addr = pble_rsrc->next_fpm_addr;
+ get_sd_pd_idx(pble_rsrc, idx);
+ sd_entry = &hmc_info->sd_table.sd_entry[idx->sd_idx];
+ pages = (idx->rel_pd_idx) ? (I40IW_HMC_PD_CNT_IN_SD -
+ idx->rel_pd_idx) : I40IW_HMC_PD_CNT_IN_SD;
+ pages = min(pages, pble_rsrc->unallocated_pble >> PBLE_512_SHIFT);
+ if (!pages) {
+ ret_code = I40IW_ERR_NO_PBLCHUNKS_AVAILABLE;
+ goto error;
+ }
+ info.chunk = chunk;
+ info.hmc_info = hmc_info;
+ info.pages = pages;
+ info.sd_entry = sd_entry;
+ if (!sd_entry->valid) {
+ sd_entry_type = ((!idx->rel_pd_idx) &&
+ (pages == I40IW_HMC_PD_CNT_IN_SD) &&
+ (dev->is_pf)) ? I40IW_SD_TYPE_DIRECT :
I40IW_SD_TYPE_PAGED;
+ } else {
+ sd_entry_type = sd_entry->entry_type;
+ }
+ i40iw_debug(dev, I40IW_DEBUG_PBLE,
+ "pages = %d, unallocated_pble[%u] current_fpm_addr =
%llx\n",
+ pages, pble_rsrc->unallocated_pble,
pble_rsrc->next_fpm_addr);
+ i40iw_debug(dev, I40IW_DEBUG_PBLE, "sd_entry_type = %d sd_entry valid =
%d\n",
+ sd_entry_type, sd_entry->valid);
+
+ if (sd_entry_type == I40IW_SD_TYPE_DIRECT)
+ ret_code = add_sd_direct(dev, pble_rsrc, &info);
+ if (ret_code)
+ sd_entry_type = I40IW_SD_TYPE_PAGED;
+ else
+ pble_rsrc->stats_direct_sds++;
+
+ if (sd_entry_type == I40IW_SD_TYPE_PAGED) {
+ ret_code = add_bp_pages(dev, pble_rsrc, &info);
+ if (ret_code)
+ goto error;
+ else
+ pble_rsrc->stats_paged_sds++;
+ }
+
+ if (gen_pool_add_virt(pble_rsrc->pinfo.pool, (unsigned
long)chunk->vaddr,
+ (phys_addr_t)chunk->fpm_addr, chunk->size, -1)) {
+ i40iw_pr_err("could not allocate memory by
gen_pool_addr_virt()\n");
+ ret_code = I40IW_ERR_NO_MEMORY;
+ goto error;
+ }
+ pble_rsrc->next_fpm_addr += chunk->size;
+ i40iw_debug(dev, I40IW_DEBUG_PBLE, "next_fpm_addr = %llx chunk_size[%u]
= 0x%x\n",
+ pble_rsrc->next_fpm_addr, chunk->size, chunk->size);
+ pble_rsrc->unallocated_pble -= (chunk->size >> 3);
+ list_add(&chunk->list, &pble_rsrc->pinfo.clist);
+ sd_reg_val = (sd_entry_type == I40IW_SD_TYPE_PAGED) ?
+ sd_entry->u.pd_table.pd_page_addr.pa :
sd_entry->u.bp.addr.pa;
+ if (sd_entry->valid)
+ return 0;
+ if (dev->is_pf)
+ ret_code = i40iw_hmc_sd_one(dev, hmc_info->hmc_fn_id,
+ sd_reg_val, idx->sd_idx,
+ sd_entry->entry_type, true);
+ if (ret_code) {
+ i40iw_pr_err("cqp cmd failed for sd (pbles)\n");
+ goto error;
+ }
+
+ sd_entry->valid = true;
+ return 0;
+ error:
+ kfree(chunk);
+ return ret_code;
+}
+
+/**
+ * free_lvl2 - fee level 2 pble
+ * @pble_rsrc: pble resource management
+ * @palloc: level 2 pble allocation
+ */
+static void free_lvl2(struct i40iw_hmc_pble_rsrc *pble_rsrc,
+ struct i40iw_pble_alloc *palloc)
+{
+ u32 i;
+ struct gen_pool *pool;
+ struct i40iw_pble_level2 *lvl2 = &palloc->level2;
+ struct i40iw_pble_info *root = &lvl2->root;
+ struct i40iw_pble_info *leaf = lvl2->leaf;
+
+ pool = pble_rsrc->pinfo.pool;
+
+ for (i = 0; i < lvl2->leaf_cnt; i++, leaf++) {
+ if (leaf->addr)
+ gen_pool_free(pool, leaf->addr, (leaf->cnt << 3));
+ else
+ break;
+ }
+
+ if (root->addr)
+ gen_pool_free(pool, root->addr, (root->cnt << 3));
+
+ kfree(lvl2->leaf);
+ lvl2->leaf = NULL;
+}
+
+/**
+ * get_lvl2_pble - get level 2 pble resource
+ * @pble_rsrc: pble resource management
+ * @palloc: level 2 pble allocation
+ * @pool: pool pointer
+ */
+static enum i40iw_status_code get_lvl2_pble(struct i40iw_hmc_pble_rsrc
*pble_rsrc,
+ struct i40iw_pble_alloc *palloc,
+ struct gen_pool *pool)
+{
+ u32 lf4k, lflast, total, i;
+ u32 pblcnt = PBLE_PER_PAGE;
+ u64 *addr;
+ struct i40iw_pble_level2 *lvl2 = &palloc->level2;
+ struct i40iw_pble_info *root = &lvl2->root;
+ struct i40iw_pble_info *leaf;
+
+ /* number of full 512 (4K) leafs) */
+ lf4k = palloc->total_cnt >> 9;
+ lflast = palloc->total_cnt % PBLE_PER_PAGE;
+ total = (lflast == 0) ? lf4k : lf4k + 1;
+ lvl2->leaf_cnt = total;
+
+ leaf = kzalloc((sizeof(*leaf) * total), GFP_ATOMIC);
+ if (!leaf)
+ return I40IW_ERR_NO_MEMORY;
+ lvl2->leaf = leaf;
+ /* allocate pbles for the root */
+ root->addr = gen_pool_alloc(pool, (total << 3));
+ if (!root->addr) {
+ kfree(lvl2->leaf);
+ lvl2->leaf = NULL;
+ return I40IW_ERR_NO_MEMORY;
+ }
+ root->idx = fpm_to_idx(pble_rsrc,
+ (u64)gen_pool_virt_to_phys(pool, root->addr));
+ root->cnt = total;
+ addr = (u64 *)root->addr;
+ for (i = 0; i < total; i++, leaf++) {
+ pblcnt = ((lflast) && ((i + 1) == total)) ? lflast :
PBLE_PER_PAGE;
+ leaf->addr = gen_pool_alloc(pool, (pblcnt << 3));
+ if (!leaf->addr)
+ goto error;
+ leaf->idx = fpm_to_idx(pble_rsrc,
(u64)gen_pool_virt_to_phys(pool, leaf->addr));
+
+ leaf->cnt = pblcnt;
+ *addr = (u64)leaf->idx;
+ addr++;
+ }
+ palloc->level = I40IW_LEVEL_2;
+ pble_rsrc->stats_lvl2++;
+ return 0;
+ error:
+ free_lvl2(pble_rsrc, palloc);
+ return I40IW_ERR_NO_MEMORY;
+}
+
+/**
+ * get_lvl1_pble - get level 1 pble resource
+ * @dev: hardware control device structure
+ * @pble_rsrc: pble resource management
+ * @palloc: level 1 pble allocation
+ */
+static enum i40iw_status_code get_lvl1_pble(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc
*pble_rsrc,
+ struct i40iw_pble_alloc *palloc)
+{
+ u64 *addr = NULL;
+ struct gen_pool *pool;
+ struct i40iw_pble_info *lvl1 = &palloc->level1;
+
+ pool = pble_rsrc->pinfo.pool;
+ addr = (u64 *)gen_pool_alloc(pool, (palloc->total_cnt << 3));
+
+ if (!addr)
+ return I40IW_ERR_NO_MEMORY;
+
+ palloc->level = I40IW_LEVEL_1;
+ lvl1->addr = (unsigned long)addr;
+ lvl1->idx = fpm_to_idx(pble_rsrc, (u64)gen_pool_virt_to_phys(pool,
+ (unsigned long)addr));
+ lvl1->cnt = palloc->total_cnt;
+ pble_rsrc->stats_lvl1++;
+ return 0;
+}
+
+/**
+ * get_lvl1_lvl2_pble - calls get_lvl1 and get_lvl2 pble routine
+ * @dev: i40iw_sc_dev struct
+ * @pble_rsrc: pble resources
+ * @palloc: contains all inforamtion regarding pble (idx + pble addr)
+ * @pool: pointer to general purpose special memory pool descriptor
+ */
+static inline enum i40iw_status_code get_lvl1_lvl2_pble(struct i40iw_sc_dev
*dev,
+ struct
i40iw_hmc_pble_rsrc *pble_rsrc,
+ struct i40iw_pble_alloc
*palloc,
+ struct gen_pool *pool)
+{
+ enum i40iw_status_code status = 0;
+
+ status = get_lvl1_pble(dev, pble_rsrc, palloc);
+ if (status && (palloc->total_cnt > PBLE_PER_PAGE))
+ status = get_lvl2_pble(pble_rsrc, palloc, pool);
+ return status;
+}
+
+/**
+ * i40iw_get_pble - allocate pbles from the pool
+ * @dev: i40iw_sc_dev struct
+ * @pble_rsrc: pble resources
+ * @palloc: contains all inforamtion regarding pble (idx + pble addr)
+ * @pble_cnt: #of pbles requested
+ */
+enum i40iw_status_code i40iw_get_pble(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc *pble_rsrc,
+ struct i40iw_pble_alloc *palloc,
+ u32 pble_cnt)
+{
+ struct gen_pool *pool;
+ enum i40iw_status_code status = 0;
+ u32 max_sds = 0;
+ int i;
+
+ pool = pble_rsrc->pinfo.pool;
+ palloc->total_cnt = pble_cnt;
+ palloc->level = I40IW_LEVEL_0;
+ /*check first to see if we can get pble's without acquiring additional
sd's */
+ status = get_lvl1_lvl2_pble(dev, pble_rsrc, palloc, pool);
+ if (!status)
+ goto exit;
+ max_sds = (palloc->total_cnt >> 18) + 1;
+ for (i = 0; i < max_sds; i++) {
+ status = add_pble_pool(dev, pble_rsrc);
+ if (status)
+ break;
+ status = get_lvl1_lvl2_pble(dev, pble_rsrc, palloc, pool);
+ if (!status)
+ break;
+ }
+exit:
+ if (!status)
+ pble_rsrc->stats_alloc_ok++;
+ else
+ pble_rsrc->stats_alloc_fail++;
+
+ return status;
+}
+
+/**
+ * i40iw_free_pble - put pbles back into pool
+ * @pble_rsrc: pble resources
+ * @palloc: contains all inforamtion regarding pble resource being freed
+ */
+void i40iw_free_pble(struct i40iw_hmc_pble_rsrc *pble_rsrc,
+ struct i40iw_pble_alloc *palloc)
+{
+ struct gen_pool *pool;
+
+ pool = pble_rsrc->pinfo.pool;
+ if (palloc->level == I40IW_LEVEL_2)
+ free_lvl2(pble_rsrc, palloc);
+ else
+ gen_pool_free(pool, palloc->level1.addr,
+ (palloc->level1.cnt << 3));
+ pble_rsrc->stats_alloc_freed++;
+}
diff --git a/drivers/infiniband/hw/i40iw/i40iw_pble.h
b/drivers/infiniband/hw/i40iw/i40iw_pble.h
new file mode 100644
index 0000000..1c743c1
--- /dev/null
+++ b/drivers/infiniband/hw/i40iw/i40iw_pble.h
@@ -0,0 +1,131 @@
+/*******************************************************************************
+*
+* Copyright (c) 2015 Intel Corporation. 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
+* OpenFabrics.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.
+*
+*******************************************************************************/
+
+#ifndef I40IW_PBLE_H
+#define I40IW_PBLE_H
+
+#define POOL_SHIFT 6
+#define PBLE_PER_PAGE 512
+#define I40IW_HMC_PAGED_BP_SHIFT 12
+#define PBLE_512_SHIFT 9
+
+enum i40iw_pble_level {
+ I40IW_LEVEL_0 = 0,
+ I40IW_LEVEL_1 = 1,
+ I40IW_LEVEL_2 = 2
+};
+
+enum i40iw_alloc_type {
+ I40IW_NO_ALLOC = 0,
+ I40IW_DMA_COHERENT = 1,
+ I40IW_VMALLOC = 2
+};
+
+struct i40iw_pble_info {
+ unsigned long addr;
+ u32 idx;
+ u32 cnt;
+};
+
+struct i40iw_pble_level2 {
+ struct i40iw_pble_info root;
+ struct i40iw_pble_info *leaf;
+ u32 leaf_cnt;
+};
+
+struct i40iw_pble_alloc {
+ u32 total_cnt;
+ enum i40iw_pble_level level;
+ union {
+ struct i40iw_pble_info level1;
+ struct i40iw_pble_level2 level2;
+ };
+};
+
+struct sd_pd_idx {
+ u32 sd_idx;
+ u32 pd_idx;
+ u32 rel_pd_idx;
+};
+
+struct i40iw_add_page_info {
+ struct i40iw_chunk *chunk;
+ struct i40iw_hmc_sd_entry *sd_entry;
+ struct i40iw_hmc_info *hmc_info;
+ struct sd_pd_idx idx;
+ u32 pages;
+};
+
+struct i40iw_chunk {
+ struct list_head list;
+ u32 size;
+ void *vaddr;
+ u64 fpm_addr;
+ u32 pg_cnt;
+ dma_addr_t *dmaaddrs;
+ enum i40iw_alloc_type type;
+};
+
+struct i40iw_pble_pool {
+ struct gen_pool *pool;
+ struct list_head clist;
+ u32 total_pble_alloc;
+ u32 free_pble_cnt;
+ u32 pool_shift;
+};
+
+struct i40iw_hmc_pble_rsrc {
+ u32 unallocated_pble;
+ u64 fpm_base_addr;
+ u64 next_fpm_addr;
+ struct i40iw_pble_pool pinfo;
+
+ u32 stats_direct_sds;
+ u32 stats_paged_sds;
+ u64 stats_alloc_ok;
+ u64 stats_alloc_fail;
+ u64 stats_alloc_freed;
+ u64 stats_lvl1;
+ u64 stats_lvl2;
+};
+
+void i40iw_destroy_pble_pool(struct i40iw_sc_dev *dev, struct
i40iw_hmc_pble_rsrc *pble_rsrc);
+enum i40iw_status_code i40iw_hmc_init_pble(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc
*pble_rsrc);
+void i40iw_free_pble(struct i40iw_hmc_pble_rsrc *pble_rsrc, struct
i40iw_pble_alloc *palloc);
+enum i40iw_status_code i40iw_get_pble(struct i40iw_sc_dev *dev,
+ struct i40iw_hmc_pble_rsrc *pble_rsrc,
+ struct i40iw_pble_alloc *palloc,
+ u32 pble_cnt);
+#endif
--
2.5.3
--
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