1 files changed, 0 insertions, 464 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.c
deleted file mode 100644
index d88a7a7b2..000000000
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.c
+++ /dev/null
@@ -1,464 +0,0 @@
-/*
- * cxgb4_ppm.c: Chelsio common library for T4/T5 iSCSI PagePod Manager
- *
- * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Written by: Karen Xie (kxie@chelsio.com)
- */
-
-#include <linux/kernel.h>
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/debugfs.h>
-#include <linux/export.h>
-#include <linux/list.h>
-#include <linux/skbuff.h>
-#include <linux/pci.h>
-#include <linux/scatterlist.h>
-
-#include "cxgb4_ppm.h"
-
-/* Direct Data Placement -
- * Directly place the iSCSI Data-In or Data-Out PDU's payload into
- * pre-posted final destination host-memory buffers based on the
- * Initiator Task Tag (ITT) in Data-In or Target Task Tag (TTT)
- * in Data-Out PDUs. The host memory address is programmed into
- * h/w in the format of pagepod entries. The location of the
- * pagepod entry is encoded into ddp tag which is used as the base
- * for ITT/TTT.
- */
-
-/* Direct-Data Placement page size adjustment
- */
-int cxgbi_ppm_find_page_index(struct cxgbi_ppm *ppm, unsigned long pgsz)
-{
-	struct cxgbi_tag_format *tformat = &ppm->tformat;
-	int i;
-
-	for (i = 0; i < DDP_PGIDX_MAX; i++) {
-		if (pgsz == 1UL << (DDP_PGSZ_BASE_SHIFT +
-					 tformat->pgsz_order[i])) {
-			pr_debug("%s: %s ppm, pgsz %lu -> idx %d.\n",
-				 __func__, ppm->ndev->name, pgsz, i);
-			return i;
-		}
-	}
-	pr_info("ippm: ddp page size %lu not supported.\n", pgsz);
-	return DDP_PGIDX_MAX;
-}
-
-/* DDP setup & teardown
- */
-static int ppm_find_unused_entries(unsigned long *bmap,
-				   unsigned int max_ppods,
-				   unsigned int start,
-				   unsigned int nr,
-				   unsigned int align_mask)
-{
-	unsigned long i;
-
-	i = bitmap_find_next_zero_area(bmap, max_ppods, start, nr, align_mask);
-
-	if (unlikely(i >= max_ppods) && (start > nr))
-		i = bitmap_find_next_zero_area(bmap, max_ppods, 0, start - 1,
-					       align_mask);
-	if (unlikely(i >= max_ppods))
-		return -ENOSPC;
-
-	bitmap_set(bmap, i, nr);
-	return (int)i;
-}
-
-static void ppm_mark_entries(struct cxgbi_ppm *ppm, int i, int count,
-			     unsigned long caller_data)
-{
-	struct cxgbi_ppod_data *pdata = ppm->ppod_data + i;
-
-	pdata->caller_data = caller_data;
-	pdata->npods = count;
-
-	if (pdata->color == ((1 << PPOD_IDX_SHIFT) - 1))
-		pdata->color = 0;
-	else
-		pdata->color++;
-}
-
-static int ppm_get_cpu_entries(struct cxgbi_ppm *ppm, unsigned int count,
-			       unsigned long caller_data)
-{
-	struct cxgbi_ppm_pool *pool;
-	unsigned int cpu;
-	int i;
-
-	cpu = get_cpu();
-	pool = per_cpu_ptr(ppm->pool, cpu);
-	spin_lock_bh(&pool->lock);
-	put_cpu();
-
-	i = ppm_find_unused_entries(pool->bmap, ppm->pool_index_max,
-				    pool->next, count, 0);
-	if (i < 0) {
-		pool->next = 0;
-		spin_unlock_bh(&pool->lock);
-		return -ENOSPC;
-	}
-
-	pool->next = i + count;
-	if (pool->next >= ppm->pool_index_max)
-		pool->next = 0;
-
-	spin_unlock_bh(&pool->lock);
-
-	pr_debug("%s: cpu %u, idx %d + %d (%d), next %u.\n",
-		 __func__, cpu, i, count, i + cpu * ppm->pool_index_max,
-		pool->next);
-
-	i += cpu * ppm->pool_index_max;
-	ppm_mark_entries(ppm, i, count, caller_data);
-
-	return i;
-}
-
-static int ppm_get_entries(struct cxgbi_ppm *ppm, unsigned int count,
-			   unsigned long caller_data)
-{
-	int i;
-
-	spin_lock_bh(&ppm->map_lock);
-	i = ppm_find_unused_entries(ppm->ppod_bmap, ppm->bmap_index_max,
-				    ppm->next, count, 0);
-	if (i < 0) {
-		ppm->next = 0;
-		spin_unlock_bh(&ppm->map_lock);
-		pr_debug("ippm: NO suitable entries %u available.\n",
-			 count);
-		return -ENOSPC;
-	}
-
-	ppm->next = i + count;
-	if (ppm->next >= ppm->bmap_index_max)
-		ppm->next = 0;
-
-	spin_unlock_bh(&ppm->map_lock);
-
-	pr_debug("%s: idx %d + %d (%d), next %u, caller_data 0x%lx.\n",
-		 __func__, i, count, i + ppm->pool_rsvd, ppm->next,
-		 caller_data);
-
-	i += ppm->pool_rsvd;
-	ppm_mark_entries(ppm, i, count, caller_data);
-
-	return i;
-}
-
-static void ppm_unmark_entries(struct cxgbi_ppm *ppm, int i, int count)
-{
-	pr_debug("%s: idx %d + %d.\n", __func__, i, count);
-
-	if (i < ppm->pool_rsvd) {
-		unsigned int cpu;
-		struct cxgbi_ppm_pool *pool;
-
-		cpu = i / ppm->pool_index_max;
-		i %= ppm->pool_index_max;
-
-		pool = per_cpu_ptr(ppm->pool, cpu);
-		spin_lock_bh(&pool->lock);
-		bitmap_clear(pool->bmap, i, count);
-
-		if (i < pool->next)
-			pool->next = i;
-		spin_unlock_bh(&pool->lock);
-
-		pr_debug("%s: cpu %u, idx %d, next %u.\n",
-			 __func__, cpu, i, pool->next);
-	} else {
-		spin_lock_bh(&ppm->map_lock);
-
-		i -= ppm->pool_rsvd;
-		bitmap_clear(ppm->ppod_bmap, i, count);
-
-		if (i < ppm->next)
-			ppm->next = i;
-		spin_unlock_bh(&ppm->map_lock);
-
-		pr_debug("%s: idx %d, next %u.\n", __func__, i, ppm->next);
-	}
-}
-
-void cxgbi_ppm_ppod_release(struct cxgbi_ppm *ppm, u32 idx)
-{
-	struct cxgbi_ppod_data *pdata;
-
-	if (idx >= ppm->ppmax) {
-		pr_warn("ippm: idx too big %u > %u.\n", idx, ppm->ppmax);
-		return;
-	}
-
-	pdata = ppm->ppod_data + idx;
-	if (!pdata->npods) {
-		pr_warn("ippm: idx %u, npods 0.\n", idx);
-		return;
-	}
-
-	pr_debug("release idx %u, npods %u.\n", idx, pdata->npods);
-	ppm_unmark_entries(ppm, idx, pdata->npods);
-}
-EXPORT_SYMBOL(cxgbi_ppm_ppod_release);
-
-int cxgbi_ppm_ppods_reserve(struct cxgbi_ppm *ppm, unsigned short nr_pages,
-			    u32 per_tag_pg_idx, u32 *ppod_idx,
-			    u32 *ddp_tag, unsigned long caller_data)
-{
-	struct cxgbi_ppod_data *pdata;
-	unsigned int npods;
-	int idx = -1;
-	unsigned int hwidx;
-	u32 tag;
-
-	npods = (nr_pages + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
-	if (!npods) {
-		pr_warn("%s: pages %u -> npods %u, full.\n",
-			__func__, nr_pages, npods);
-		return -EINVAL;
-	}
-
-	/* grab from cpu pool first */
-	idx = ppm_get_cpu_entries(ppm, npods, caller_data);
-	/* try the general pool */
-	if (idx < 0)
-		idx = ppm_get_entries(ppm, npods, caller_data);
-	if (idx < 0) {
-		pr_debug("ippm: pages %u, nospc %u, nxt %u, 0x%lx.\n",
-			 nr_pages, npods, ppm->next, caller_data);
-		return idx;
-	}
-
-	pdata = ppm->ppod_data + idx;
-	hwidx = ppm->base_idx + idx;
-
-	tag = cxgbi_ppm_make_ddp_tag(hwidx, pdata->color);
-
-	if (per_tag_pg_idx)
-		tag |= (per_tag_pg_idx << 30) & 0xC0000000;
-
-	*ppod_idx = idx;
-	*ddp_tag = tag;
-
-	pr_debug("ippm: sg %u, tag 0x%x(%u,%u), data 0x%lx.\n",
-		 nr_pages, tag, idx, npods, caller_data);
-
-	return npods;
-}
-EXPORT_SYMBOL(cxgbi_ppm_ppods_reserve);
-
-void cxgbi_ppm_make_ppod_hdr(struct cxgbi_ppm *ppm, u32 tag,
-			     unsigned int tid, unsigned int offset,
-			     unsigned int length,
-			     struct cxgbi_pagepod_hdr *hdr)
-{
-	/* The ddp tag in pagepod should be with bit 31:30 set to 0.
-	 * The ddp Tag on the wire should be with non-zero 31:30 to the peer
-	 */
-	tag &= 0x3FFFFFFF;
-
-	hdr->vld_tid = htonl(PPOD_VALID_FLAG | PPOD_TID(tid));
-
-	hdr->rsvd = 0;
-	hdr->pgsz_tag_clr = htonl(tag & ppm->tformat.idx_clr_mask);
-	hdr->max_offset = htonl(length);
-	hdr->page_offset = htonl(offset);
-
-	pr_debug("ippm: tag 0x%x, tid 0x%x, xfer %u, off %u.\n",
-		 tag, tid, length, offset);
-}
-EXPORT_SYMBOL(cxgbi_ppm_make_ppod_hdr);
-
-static void ppm_free(struct cxgbi_ppm *ppm)
-{
-	vfree(ppm);
-}
-
-static void ppm_destroy(struct kref *kref)
-{
-	struct cxgbi_ppm *ppm = container_of(kref,
-					     struct cxgbi_ppm,
-					     refcnt);
-	pr_info("ippm: kref 0, destroy %s ppm 0x%p.\n",
-		ppm->ndev->name, ppm);
-
-	*ppm->ppm_pp = NULL;
-
-	free_percpu(ppm->pool);
-	ppm_free(ppm);
-}
-
-int cxgbi_ppm_release(struct cxgbi_ppm *ppm)
-{
-	if (ppm) {
-		int rv;
-
-		rv = kref_put(&ppm->refcnt, ppm_destroy);
-		return rv;
-	}
-	return 1;
-}
-
-static struct cxgbi_ppm_pool *ppm_alloc_cpu_pool(unsigned int *total,
-						 unsigned int *pcpu_ppmax)
-{
-	struct cxgbi_ppm_pool *pools;
-	unsigned int ppmax = (*total) / num_possible_cpus();
-	unsigned int max = (PCPU_MIN_UNIT_SIZE - sizeof(*pools)) << 3;
-	unsigned int bmap;
-	unsigned int alloc_sz;
-	unsigned int count = 0;
-	unsigned int cpu;
-
-	/* make sure per cpu pool fits into PCPU_MIN_UNIT_SIZE */
-	if (ppmax > max)
-		ppmax = max;
-
-	/* pool size must be multiple of unsigned long */
-	bmap = BITS_TO_LONGS(ppmax);
-	ppmax = (bmap * sizeof(unsigned long)) << 3;
-
-	alloc_sz = sizeof(*pools) + sizeof(unsigned long) * bmap;
-	pools = __alloc_percpu(alloc_sz, __alignof__(struct cxgbi_ppm_pool));
-
-	if (!pools)
-		return NULL;
-
-	for_each_possible_cpu(cpu) {
-		struct cxgbi_ppm_pool *ppool = per_cpu_ptr(pools, cpu);
-
-		memset(ppool, 0, alloc_sz);
-		spin_lock_init(&ppool->lock);
-		count += ppmax;
-	}
-
-	*total = count;
-	*pcpu_ppmax = ppmax;
-
-	return pools;
-}
-
-int cxgbi_ppm_init(void **ppm_pp, struct net_device *ndev,
-		   struct pci_dev *pdev, void *lldev,
-		   struct cxgbi_tag_format *tformat,
-		   unsigned int ppmax,
-		   unsigned int llimit,
-		   unsigned int start,
-		   unsigned int reserve_factor)
-{
-	struct cxgbi_ppm *ppm = (struct cxgbi_ppm *)(*ppm_pp);
-	struct cxgbi_ppm_pool *pool = NULL;
-	unsigned int ppmax_pool = 0;
-	unsigned int pool_index_max = 0;
-	unsigned int alloc_sz;
-	unsigned int ppod_bmap_size;
-
-	if (ppm) {
-		pr_info("ippm: %s, ppm 0x%p,0x%p already initialized, %u/%u.\n",
-			ndev->name, ppm_pp, ppm, ppm->ppmax, ppmax);
-		kref_get(&ppm->refcnt);
-		return 1;
-	}
-
-	if (reserve_factor) {
-		ppmax_pool = ppmax / reserve_factor;
-		pool = ppm_alloc_cpu_pool(&ppmax_pool, &pool_index_max);
-
-		pr_debug("%s: ppmax %u, cpu total %u, per cpu %u.\n",
-			 ndev->name, ppmax, ppmax_pool, pool_index_max);
-	}
-
-	ppod_bmap_size = BITS_TO_LONGS(ppmax - ppmax_pool);
-	alloc_sz = sizeof(struct cxgbi_ppm) +
-			ppmax * (sizeof(struct cxgbi_ppod_data)) +
-			ppod_bmap_size * sizeof(unsigned long);
-
-	ppm = vmalloc(alloc_sz);
-	if (!ppm)
-		goto release_ppm_pool;
-
-	memset(ppm, 0, alloc_sz);
-
-	ppm->ppod_bmap = (unsigned long *)(&ppm->ppod_data[ppmax]);
-
-	if ((ppod_bmap_size >> 3) > (ppmax - ppmax_pool)) {
-		unsigned int start = ppmax - ppmax_pool;
-		unsigned int end = ppod_bmap_size >> 3;
-
-		bitmap_set(ppm->ppod_bmap, ppmax, end - start);
-		pr_info("%s: %u - %u < %u * 8, mask extra bits %u, %u.\n",
-			__func__, ppmax, ppmax_pool, ppod_bmap_size, start,
-			end);
-	}
-
-	spin_lock_init(&ppm->map_lock);
-	kref_init(&ppm->refcnt);
-
-	memcpy(&ppm->tformat, tformat, sizeof(struct cxgbi_tag_format));
-
-	ppm->ppm_pp = ppm_pp;
-	ppm->ndev = ndev;
-	ppm->pdev = pdev;
-	ppm->lldev = lldev;
-	ppm->ppmax = ppmax;
-	ppm->next = 0;
-	ppm->llimit = llimit;
-	ppm->base_idx = start > llimit ?
-			(start - llimit + 1) >> PPOD_SIZE_SHIFT : 0;
-	ppm->bmap_index_max = ppmax - ppmax_pool;
-
-	ppm->pool = pool;
-	ppm->pool_rsvd = ppmax_pool;
-	ppm->pool_index_max = pool_index_max;
-
-	/* check one more time */
-	if (*ppm_pp) {
-		ppm_free(ppm);
-		ppm = (struct cxgbi_ppm *)(*ppm_pp);
-
-		pr_info("ippm: %s, ppm 0x%p,0x%p already initialized, %u/%u.\n",
-			ndev->name, ppm_pp, *ppm_pp, ppm->ppmax, ppmax);
-
-		kref_get(&ppm->refcnt);
-		return 1;
-	}
-	*ppm_pp = ppm;
-
-	ppm->tformat.pgsz_idx_dflt = cxgbi_ppm_find_page_index(ppm, PAGE_SIZE);
-
-	pr_info("ippm %s: ppm 0x%p, 0x%p, base %u/%u, pg %lu,%u, rsvd %u,%u.\n",
-		ndev->name, ppm_pp, ppm, ppm->base_idx, ppm->ppmax, PAGE_SIZE,
-		ppm->tformat.pgsz_idx_dflt, ppm->pool_rsvd,
-		ppm->pool_index_max);
-
-	return 0;
-
-release_ppm_pool:
-	free_percpu(pool);
-	return -ENOMEM;
-}
-EXPORT_SYMBOL(cxgbi_ppm_init);
-
-unsigned int cxgbi_tagmask_set(unsigned int ppmax)
-{
-	unsigned int bits = fls(ppmax);
-
-	if (bits > PPOD_IDX_MAX_SIZE)
-		bits = PPOD_IDX_MAX_SIZE;
-
-	pr_info("ippm: ppmax %u/0x%x -> bits %u, tagmask 0x%x.\n",
-		ppmax, ppmax, bits, 1 << (bits + PPOD_IDX_SHIFT));
-
-	return 1 << (bits + PPOD_IDX_SHIFT);
-}