diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.h')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.h | 310 |
1 files changed, 0 insertions, 310 deletions
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__*/ |