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path: root/drivers/net/ethernet/chelsio/cxgb4
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-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.c464
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.h310
2 files changed, 0 insertions, 774 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);
-}
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.h
deleted file mode 100644
index d48732673..000000000
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.h
+++ /dev/null
@@ -1,310 +0,0 @@
-/*
- * cxgb4_ppm.h: Chelsio common library for T4/T5 iSCSI ddp operation
- *
- * 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)
- */
-
-#ifndef __CXGB4PPM_H__
-#define __CXGB4PPM_H__
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/debugfs.h>
-#include <linux/list.h>
-#include <linux/netdevice.h>
-#include <linux/scatterlist.h>
-#include <linux/skbuff.h>
-#include <linux/vmalloc.h>
-#include <linux/bitmap.h>
-
-struct cxgbi_pagepod_hdr {
- u32 vld_tid;
- u32 pgsz_tag_clr;
- u32 max_offset;
- u32 page_offset;
- u64 rsvd;
-};
-
-#define PPOD_PAGES_MAX 4
-struct cxgbi_pagepod {
- struct cxgbi_pagepod_hdr hdr;
- u64 addr[PPOD_PAGES_MAX + 1];
-};
-
-/* ddp tag format
- * for a 32-bit tag:
- * bit #
- * 31 ..... ..... 0
- * X Y...Y Z...Z, where
- * ^ ^^^^^ ^^^^
- * | | |____ when ddp bit = 0: color bits
- * | |
- * | |____ when ddp bit = 0: idx into the ddp memory region
- * |
- * |____ ddp bit: 0 - ddp tag, 1 - non-ddp tag
- *
- * [page selector:2] [sw/free bits] [0] [idx] [color:6]
- */
-
-#define DDP_PGIDX_MAX 4
-#define DDP_PGSZ_BASE_SHIFT 12 /* base page 4K */
-
-struct cxgbi_task_tag_info {
- unsigned char flags;
-#define CXGBI_PPOD_INFO_FLAG_VALID 0x1
-#define CXGBI_PPOD_INFO_FLAG_MAPPED 0x2
- unsigned char cid;
- unsigned short pg_shift;
- unsigned int npods;
- unsigned int idx;
- unsigned int tag;
- struct cxgbi_pagepod_hdr hdr;
- int nents;
- int nr_pages;
- struct scatterlist *sgl;
-};
-
-struct cxgbi_tag_format {
- unsigned char pgsz_order[DDP_PGIDX_MAX];
- unsigned char pgsz_idx_dflt;
- unsigned char free_bits:4;
- unsigned char color_bits:4;
- unsigned char idx_bits;
- unsigned char rsvd_bits;
- unsigned int no_ddp_mask;
- unsigned int idx_mask;
- unsigned int color_mask;
- unsigned int idx_clr_mask;
- unsigned int rsvd_mask;
-};
-
-struct cxgbi_ppod_data {
- unsigned char pg_idx:2;
- unsigned char color:6;
- unsigned char chan_id;
- unsigned short npods;
- unsigned long caller_data;
-};
-
-/* per cpu ppm pool */
-struct cxgbi_ppm_pool {
- unsigned int base; /* base index */
- unsigned int next; /* next possible free index */
- spinlock_t lock; /* ppm pool lock */
- unsigned long bmap[0];
-} ____cacheline_aligned_in_smp;
-
-struct cxgbi_ppm {
- struct kref refcnt;
- struct net_device *ndev; /* net_device, 1st port */
- struct pci_dev *pdev;
- void *lldev;
- void **ppm_pp;
- struct cxgbi_tag_format tformat;
- unsigned int ppmax;
- unsigned int llimit;
- unsigned int base_idx;
-
- unsigned int pool_rsvd;
- unsigned int pool_index_max;
- struct cxgbi_ppm_pool __percpu *pool;
- /* map lock */
- spinlock_t map_lock; /* ppm map lock */
- unsigned int bmap_index_max;
- unsigned int next;
- unsigned long *ppod_bmap;
- struct cxgbi_ppod_data ppod_data[0];
-};
-
-#define DDP_THRESHOLD 512
-
-#define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */
-
-#define IPPOD_SIZE sizeof(struct cxgbi_pagepod) /* 64 */
-#define PPOD_SIZE_SHIFT 6
-
-/* page pods are allocated in groups of this size (must be power of 2) */
-#define PPOD_CLUSTER_SIZE 16U
-
-#define ULPMEM_DSGL_MAX_NPPODS 16 /* 1024/PPOD_SIZE */
-#define ULPMEM_IDATA_MAX_NPPODS 3 /* (PPOD_SIZE * 3 + ulptx hdr) < 256B */
-#define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */
-
-#define PPOD_COLOR_SHIFT 0
-#define PPOD_COLOR(x) ((x) << PPOD_COLOR_SHIFT)
-
-#define PPOD_IDX_SHIFT 6
-#define PPOD_IDX_MAX_SIZE 24
-
-#define PPOD_TID_SHIFT 0
-#define PPOD_TID(x) ((x) << PPOD_TID_SHIFT)
-
-#define PPOD_TAG_SHIFT 6
-#define PPOD_TAG(x) ((x) << PPOD_TAG_SHIFT)
-
-#define PPOD_VALID_SHIFT 24
-#define PPOD_VALID(x) ((x) << PPOD_VALID_SHIFT)
-#define PPOD_VALID_FLAG PPOD_VALID(1U)
-
-#define PPOD_PI_EXTRACT_CTL_SHIFT 31
-#define PPOD_PI_EXTRACT_CTL(x) ((x) << PPOD_PI_EXTRACT_CTL_SHIFT)
-#define PPOD_PI_EXTRACT_CTL_FLAG V_PPOD_PI_EXTRACT_CTL(1U)
-
-#define PPOD_PI_TYPE_SHIFT 29
-#define PPOD_PI_TYPE_MASK 0x3
-#define PPOD_PI_TYPE(x) ((x) << PPOD_PI_TYPE_SHIFT)
-
-#define PPOD_PI_CHECK_CTL_SHIFT 27
-#define PPOD_PI_CHECK_CTL_MASK 0x3
-#define PPOD_PI_CHECK_CTL(x) ((x) << PPOD_PI_CHECK_CTL_SHIFT)
-
-#define PPOD_PI_REPORT_CTL_SHIFT 25
-#define PPOD_PI_REPORT_CTL_MASK 0x3
-#define PPOD_PI_REPORT_CTL(x) ((x) << PPOD_PI_REPORT_CTL_SHIFT)
-
-static inline int cxgbi_ppm_is_ddp_tag(struct cxgbi_ppm *ppm, u32 tag)
-{
- return !(tag & ppm->tformat.no_ddp_mask);
-}
-
-static inline int cxgbi_ppm_sw_tag_is_usable(struct cxgbi_ppm *ppm,
- u32 tag)
-{
- /* the sw tag must be using <= 31 bits */
- return !(tag & 0x80000000U);
-}
-
-static inline int cxgbi_ppm_make_non_ddp_tag(struct cxgbi_ppm *ppm,
- u32 sw_tag,
- u32 *final_tag)
-{
- struct cxgbi_tag_format *tformat = &ppm->tformat;
-
- if (!cxgbi_ppm_sw_tag_is_usable(ppm, sw_tag)) {
- pr_info("sw_tag 0x%x NOT usable.\n", sw_tag);
- return -EINVAL;
- }
-
- if (!sw_tag) {
- *final_tag = tformat->no_ddp_mask;
- } else {
- unsigned int shift = tformat->idx_bits + tformat->color_bits;
- u32 lower = sw_tag & tformat->idx_clr_mask;
- u32 upper = (sw_tag >> shift) << (shift + 1);
-
- *final_tag = upper | tformat->no_ddp_mask | lower;
- }
- return 0;
-}
-
-static inline u32 cxgbi_ppm_decode_non_ddp_tag(struct cxgbi_ppm *ppm,
- u32 tag)
-{
- struct cxgbi_tag_format *tformat = &ppm->tformat;
- unsigned int shift = tformat->idx_bits + tformat->color_bits;
- u32 lower = tag & tformat->idx_clr_mask;
- u32 upper = (tag >> tformat->rsvd_bits) << shift;
-
- return upper | lower;
-}
-
-static inline u32 cxgbi_ppm_ddp_tag_get_idx(struct cxgbi_ppm *ppm,
- u32 ddp_tag)
-{
- u32 hw_idx = (ddp_tag >> PPOD_IDX_SHIFT) &
- ppm->tformat.idx_mask;
-
- return hw_idx - ppm->base_idx;
-}
-
-static inline u32 cxgbi_ppm_make_ddp_tag(unsigned int hw_idx,
- unsigned char color)
-{
- return (hw_idx << PPOD_IDX_SHIFT) | ((u32)color);
-}
-
-static inline unsigned long
-cxgbi_ppm_get_tag_caller_data(struct cxgbi_ppm *ppm,
- u32 ddp_tag)
-{
- u32 idx = cxgbi_ppm_ddp_tag_get_idx(ppm, ddp_tag);
-
- return ppm->ppod_data[idx].caller_data;
-}
-
-/* sw bits are the free bits */
-static inline int cxgbi_ppm_ddp_tag_update_sw_bits(struct cxgbi_ppm *ppm,
- u32 val, u32 orig_tag,
- u32 *final_tag)
-{
- struct cxgbi_tag_format *tformat = &ppm->tformat;
- u32 v = val >> tformat->free_bits;
-
- if (v) {
- pr_info("sw_bits 0x%x too large, avail bits %u.\n",
- val, tformat->free_bits);
- return -EINVAL;
- }
- if (!cxgbi_ppm_is_ddp_tag(ppm, orig_tag))
- return -EINVAL;
-
- *final_tag = (val << tformat->rsvd_bits) |
- (orig_tag & ppm->tformat.rsvd_mask);
- return 0;
-}
-
-static inline void cxgbi_ppm_ppod_clear(struct cxgbi_pagepod *ppod)
-{
- ppod->hdr.vld_tid = 0U;
-}
-
-static inline void cxgbi_tagmask_check(unsigned int tagmask,
- struct cxgbi_tag_format *tformat)
-{
- unsigned int bits = fls(tagmask);
-
- /* reserve top most 2 bits for page selector */
- tformat->free_bits = 32 - 2 - bits;
- tformat->rsvd_bits = bits;
- tformat->color_bits = PPOD_IDX_SHIFT;
- tformat->idx_bits = bits - 1 - PPOD_IDX_SHIFT;
- tformat->no_ddp_mask = 1 << (bits - 1);
- tformat->idx_mask = (1 << tformat->idx_bits) - 1;
- tformat->color_mask = (1 << PPOD_IDX_SHIFT) - 1;
- tformat->idx_clr_mask = (1 << (bits - 1)) - 1;
- tformat->rsvd_mask = (1 << bits) - 1;
-
- pr_info("ippm: tagmask 0x%x, rsvd %u=%u+%u+1, mask 0x%x,0x%x, "
- "pg %u,%u,%u,%u.\n",
- tagmask, tformat->rsvd_bits, tformat->idx_bits,
- tformat->color_bits, tformat->no_ddp_mask, tformat->rsvd_mask,
- tformat->pgsz_order[0], tformat->pgsz_order[1],
- tformat->pgsz_order[2], tformat->pgsz_order[3]);
-}
-
-int cxgbi_ppm_find_page_index(struct cxgbi_ppm *ppm, unsigned long pgsz);
-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);
-void cxgbi_ppm_ppod_release(struct cxgbi_ppm *, u32 idx);
-int cxgbi_ppm_ppods_reserve(struct cxgbi_ppm *, unsigned short nr_pages,
- u32 per_tag_pg_idx, u32 *ppod_idx, u32 *ddp_tag,
- unsigned long caller_data);
-int cxgbi_ppm_init(void **ppm_pp, struct net_device *, struct pci_dev *,
- void *lldev, struct cxgbi_tag_format *,
- unsigned int ppmax, unsigned int llimit,
- unsigned int start,
- unsigned int reserve_factor);
-int cxgbi_ppm_release(struct cxgbi_ppm *ppm);
-void cxgbi_tagmask_check(unsigned int tagmask, struct cxgbi_tag_format *);
-unsigned int cxgbi_tagmask_set(unsigned int ppmax);
-
-#endif /*__CXGB4PPM_H__*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-18 21:41:49 +0000