i40iw: add pble resource files

i40iw_pble.[ch] to manage pble resource for iwarp clients.

Changes since v2:
        remove unnecessary casts

Acked-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/i40iw/i40iw_pble.h

@@ -0,0 +1,131 @@
+/*******************************************************************************
+*
+* Copyright (c) 2015-2016 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