kernel/drivers/net/ethernet/intel/i40evf/i40e_hmc.h

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2014 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #ifndef _I40E_HMC_H_
  28 #define _I40E_HMC_H_
  29
  30 #define I40E_HMC_MAX_BP_COUNT 512
  31
  32 /* forward-declare the HW struct for the compiler */
  33 struct i40e_hw;
  34
  35 #define I40E_HMC_INFO_SIGNATURE         0x484D5347 /* HMSG */
  36 #define I40E_HMC_PD_CNT_IN_SD           512
  37 #define I40E_HMC_DIRECT_BP_SIZE         0x200000 /* 2M */
  38 #define I40E_HMC_PAGED_BP_SIZE          4096
  39 #define I40E_HMC_PD_BP_BUF_ALIGNMENT    4096
  40 #define I40E_FIRST_VF_FPM_ID            16
  41
  42 struct i40e_hmc_obj_info {
  43         u64 base;       /* base addr in FPM */
  44         u32 max_cnt;    /* max count available for this hmc func */
  45         u32 cnt;        /* count of objects driver actually wants to create */
  46         u64 size;       /* size in bytes of one object */
  47 };
  48
  49 enum i40e_sd_entry_type {
  50         I40E_SD_TYPE_INVALID = 0,
  51         I40E_SD_TYPE_PAGED   = 1,
  52         I40E_SD_TYPE_DIRECT  = 2
  53 };
  54
  55 struct i40e_hmc_bp {
  56         enum i40e_sd_entry_type entry_type;
  57         struct i40e_dma_mem addr; /* populate to be used by hw */
  58         u32 sd_pd_index;
  59         u32 ref_cnt;
  60 };
  61
  62 struct i40e_hmc_pd_entry {
  63         struct i40e_hmc_bp bp;
  64         u32 sd_index;
  65         bool rsrc_pg;
  66         bool valid;
  67 };
  68
  69 struct i40e_hmc_pd_table {
  70         struct i40e_dma_mem pd_page_addr; /* populate to be used by hw */
  71         struct i40e_hmc_pd_entry  *pd_entry; /* [512] for sw book keeping */
  72         struct i40e_virt_mem pd_entry_virt_mem; /* virt mem for pd_entry */
  73
  74         u32 ref_cnt;
  75         u32 sd_index;
  76 };
  77
  78 struct i40e_hmc_sd_entry {
  79         enum i40e_sd_entry_type entry_type;
  80         bool valid;
  81
  82         union {
  83                 struct i40e_hmc_pd_table pd_table;
  84                 struct i40e_hmc_bp bp;
  85         } u;
  86 };
  87
  88 struct i40e_hmc_sd_table {
  89         struct i40e_virt_mem addr; /* used to track sd_entry allocations */
  90         u32 sd_cnt;
  91         u32 ref_cnt;
  92         struct i40e_hmc_sd_entry *sd_entry; /* (sd_cnt*512) entries max */
  93 };
  94
  95 struct i40e_hmc_info {
  96         u32 signature;
  97         /* equals to pci func num for PF and dynamically allocated for VFs */
  98         u8 hmc_fn_id;
  99         u16 first_sd_index; /* index of the first available SD */
 100
 101         /* hmc objects */
 102         struct i40e_hmc_obj_info *hmc_obj;
 103         struct i40e_virt_mem hmc_obj_virt_mem;
 104         struct i40e_hmc_sd_table sd_table;
 105 };
 106
 107 #define I40E_INC_SD_REFCNT(sd_table)    ((sd_table)->ref_cnt++)
 108 #define I40E_INC_PD_REFCNT(pd_table)    ((pd_table)->ref_cnt++)
 109 #define I40E_INC_BP_REFCNT(bp)          ((bp)->ref_cnt++)
 110
 111 #define I40E_DEC_SD_REFCNT(sd_table)    ((sd_table)->ref_cnt--)
 112 #define I40E_DEC_PD_REFCNT(pd_table)    ((pd_table)->ref_cnt--)
 113 #define I40E_DEC_BP_REFCNT(bp)          ((bp)->ref_cnt--)
 114
 115 /**
 116  * I40E_SET_PF_SD_ENTRY - marks the sd entry as valid in the hardware
 117  * @hw: pointer to our hw struct
 118  * @pa: pointer to physical address
 119  * @sd_index: segment descriptor index
 120  * @type: if sd entry is direct or paged
 121  **/
 122 #define I40E_SET_PF_SD_ENTRY(hw, pa, sd_index, type)                    \
 123 {                                                                       \
 124         u32 val1, val2, val3;                                           \
 125         val1 = (u32)(upper_32_bits(pa));                                \
 126         val2 = (u32)(pa) | (I40E_HMC_MAX_BP_COUNT <<                    \
 127                  I40E_PFHMC_SDDATALOW_PMSDBPCOUNT_SHIFT) |              \
 128                 ((((type) == I40E_SD_TYPE_PAGED) ? 0 : 1) <<            \
 129                 I40E_PFHMC_SDDATALOW_PMSDTYPE_SHIFT) |                  \
 130                 BIT(I40E_PFHMC_SDDATALOW_PMSDVALID_SHIFT);              \
 131         val3 = (sd_index) | BIT_ULL(I40E_PFHMC_SDCMD_PMSDWR_SHIFT);     \
 132         wr32((hw), I40E_PFHMC_SDDATAHIGH, val1);                        \
 133         wr32((hw), I40E_PFHMC_SDDATALOW, val2);                         \
 134         wr32((hw), I40E_PFHMC_SDCMD, val3);                             \
 135 }
 136
 137 /**
 138  * I40E_CLEAR_PF_SD_ENTRY - marks the sd entry as invalid in the hardware
 139  * @hw: pointer to our hw struct
 140  * @sd_index: segment descriptor index
 141  * @type: if sd entry is direct or paged
 142  **/
 143 #define I40E_CLEAR_PF_SD_ENTRY(hw, sd_index, type)                      \
 144 {                                                                       \
 145         u32 val2, val3;                                                 \
 146         val2 = (I40E_HMC_MAX_BP_COUNT <<                                \
 147                 I40E_PFHMC_SDDATALOW_PMSDBPCOUNT_SHIFT) |               \
 148                 ((((type) == I40E_SD_TYPE_PAGED) ? 0 : 1) <<            \
 149                 I40E_PFHMC_SDDATALOW_PMSDTYPE_SHIFT);                   \
 150         val3 = (sd_index) | BIT_ULL(I40E_PFHMC_SDCMD_PMSDWR_SHIFT);     \
 151         wr32((hw), I40E_PFHMC_SDDATAHIGH, 0);                           \
 152         wr32((hw), I40E_PFHMC_SDDATALOW, val2);                         \
 153         wr32((hw), I40E_PFHMC_SDCMD, val3);                             \
 154 }
 155
 156 /**
 157  * I40E_INVALIDATE_PF_HMC_PD - Invalidates the pd cache in the hardware
 158  * @hw: pointer to our hw struct
 159  * @sd_idx: segment descriptor index
 160  * @pd_idx: page descriptor index
 161  **/
 162 #define I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, pd_idx)                   \
 163         wr32((hw), I40E_PFHMC_PDINV,                                    \
 164             (((sd_idx) << I40E_PFHMC_PDINV_PMSDIDX_SHIFT) |             \
 165              ((pd_idx) << I40E_PFHMC_PDINV_PMPDIDX_SHIFT)))
 166
 167 /**
 168  * I40E_FIND_SD_INDEX_LIMIT - finds segment descriptor index limit
 169  * @hmc_info: pointer to the HMC configuration information structure
 170  * @type: type of HMC resources we're searching
 171  * @index: starting index for the object
 172  * @cnt: number of objects we're trying to create
 173  * @sd_idx: pointer to return index of the segment descriptor in question
 174  * @sd_limit: pointer to return the maximum number of segment descriptors
 175  *
 176  * This function calculates the segment descriptor index and index limit
 177  * for the resource defined by i40e_hmc_rsrc_type.
 178  **/
 179 #define I40E_FIND_SD_INDEX_LIMIT(hmc_info, type, index, cnt, sd_idx, sd_limit)\
 180 {                                                                       \
 181         u64 fpm_addr, fpm_limit;                                        \
 182         fpm_addr = (hmc_info)->hmc_obj[(type)].base +                   \
 183                    (hmc_info)->hmc_obj[(type)].size * (index);          \
 184         fpm_limit = fpm_addr + (hmc_info)->hmc_obj[(type)].size * (cnt);\
 185         *(sd_idx) = (u32)(fpm_addr / I40E_HMC_DIRECT_BP_SIZE);          \
 186         *(sd_limit) = (u32)((fpm_limit - 1) / I40E_HMC_DIRECT_BP_SIZE); \
 187         /* add one more to the limit to correct our range */            \
 188         *(sd_limit) += 1;                                               \
 189 }
 190
 191 /**
 192  * I40E_FIND_PD_INDEX_LIMIT - finds page descriptor index limit
 193  * @hmc_info: pointer to the HMC configuration information struct
 194  * @type: HMC resource type we're examining
 195  * @idx: starting index for the object
 196  * @cnt: number of objects we're trying to create
 197  * @pd_index: pointer to return page descriptor index
 198  * @pd_limit: pointer to return page descriptor index limit
 199  *
 200  * Calculates the page descriptor index and index limit for the resource
 201  * defined by i40e_hmc_rsrc_type.
 202  **/
 203 #define I40E_FIND_PD_INDEX_LIMIT(hmc_info, type, idx, cnt, pd_index, pd_limit)\
 204 {                                                                       \
 205         u64 fpm_adr, fpm_limit;                                         \
 206         fpm_adr = (hmc_info)->hmc_obj[(type)].base +                    \
 207                   (hmc_info)->hmc_obj[(type)].size * (idx);             \
 208         fpm_limit = fpm_adr + (hmc_info)->hmc_obj[(type)].size * (cnt); \
 209         *(pd_index) = (u32)(fpm_adr / I40E_HMC_PAGED_BP_SIZE);          \
 210         *(pd_limit) = (u32)((fpm_limit - 1) / I40E_HMC_PAGED_BP_SIZE);  \
 211         /* add one more to the limit to correct our range */            \
 212         *(pd_limit) += 1;                                               \
 213 }
 214 i40e_status i40e_add_sd_table_entry(struct i40e_hw *hw,
 215                                               struct i40e_hmc_info *hmc_info,
 216                                               u32 sd_index,
 217                                               enum i40e_sd_entry_type type,
 218                                               u64 direct_mode_sz);
 219
 220 i40e_status i40e_add_pd_table_entry(struct i40e_hw *hw,
 221                                               struct i40e_hmc_info *hmc_info,
 222                                               u32 pd_index,
 223                                               struct i40e_dma_mem *rsrc_pg);
 224 i40e_status i40e_remove_pd_bp(struct i40e_hw *hw,
 225                                         struct i40e_hmc_info *hmc_info,
 226                                         u32 idx);
 227 i40e_status i40e_prep_remove_sd_bp(struct i40e_hmc_info *hmc_info,
 228                                              u32 idx);
 229 i40e_status i40e_remove_sd_bp_new(struct i40e_hw *hw,
 230                                             struct i40e_hmc_info *hmc_info,
 231                                             u32 idx, bool is_pf);
 232 i40e_status i40e_prep_remove_pd_page(struct i40e_hmc_info *hmc_info,
 233                                                u32 idx);
 234 i40e_status i40e_remove_pd_page_new(struct i40e_hw *hw,
 235                                               struct i40e_hmc_info *hmc_info,
 236                                               u32 idx, bool is_pf);
 237
 238 #endif /* _I40E_HMC_H_ */