1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2 /* Copyright (C) 2018 Netronome Systems, Inc. */ 3 4 #include <linux/kernel.h> 5 #include <net/devlink.h> 6 7 #include "nfpcore/nfp_cpp.h" 8 #include "nfpcore/nfp_nffw.h" 9 #include "nfp_abi.h" 10 #include "nfp_app.h" 11 #include "nfp_main.h" 12 13 static u32 nfp_shared_buf_pool_unit(struct nfp_pf *pf, unsigned int sb) 14 { 15 __le32 sb_id = cpu_to_le32(sb); 16 unsigned int i; 17 18 for (i = 0; i < pf->num_shared_bufs; i++) 19 if (pf->shared_bufs[i].id == sb_id) 20 return le32_to_cpu(pf->shared_bufs[i].pool_size_unit); 21 22 WARN_ON_ONCE(1); 23 return 0; 24 } 25 26 int nfp_shared_buf_pool_get(struct nfp_pf *pf, unsigned int sb, u16 pool_index, 27 struct devlink_sb_pool_info *pool_info) 28 { 29 struct nfp_shared_buf_pool_info_get get_data; 30 struct nfp_shared_buf_pool_id id = { 31 .shared_buf = cpu_to_le32(sb), 32 .pool = cpu_to_le32(pool_index), 33 }; 34 unsigned int unit_size; 35 int n; 36 37 unit_size = nfp_shared_buf_pool_unit(pf, sb); 38 if (!unit_size) 39 return -EINVAL; 40 41 n = nfp_mbox_cmd(pf, NFP_MBOX_POOL_GET, &id, sizeof(id), 42 &get_data, sizeof(get_data)); 43 if (n < 0) 44 return n; 45 if (n < sizeof(get_data)) 46 return -EIO; 47 48 pool_info->pool_type = le32_to_cpu(get_data.pool_type); 49 pool_info->threshold_type = le32_to_cpu(get_data.threshold_type); 50 pool_info->size = le32_to_cpu(get_data.size) * unit_size; 51 52 return 0; 53 } 54 55 int nfp_shared_buf_pool_set(struct nfp_pf *pf, unsigned int sb, 56 u16 pool_index, u32 size, 57 enum devlink_sb_threshold_type threshold_type) 58 { 59 struct nfp_shared_buf_pool_info_set set_data = { 60 .id = { 61 .shared_buf = cpu_to_le32(sb), 62 .pool = cpu_to_le32(pool_index), 63 }, 64 .threshold_type = cpu_to_le32(threshold_type), 65 }; 66 unsigned int unit_size; 67 68 unit_size = nfp_shared_buf_pool_unit(pf, sb); 69 if (!unit_size || size % unit_size) 70 return -EINVAL; 71 set_data.size = cpu_to_le32(size / unit_size); 72 73 return nfp_mbox_cmd(pf, NFP_MBOX_POOL_SET, &set_data, sizeof(set_data), 74 NULL, 0); 75 } 76 77 int nfp_shared_buf_register(struct nfp_pf *pf) 78 { 79 struct devlink *devlink = priv_to_devlink(pf); 80 unsigned int i, num_entries, entry_sz; 81 struct nfp_cpp_area *sb_desc_area; 82 u8 __iomem *sb_desc; 83 int n, err; 84 85 if (!pf->mbox) 86 return 0; 87 88 n = nfp_pf_rtsym_read_optional(pf, NFP_SHARED_BUF_COUNT_SYM_NAME, 0); 89 if (n <= 0) 90 return n; 91 num_entries = n; 92 93 sb_desc = nfp_pf_map_rtsym(pf, "sb_tbl", NFP_SHARED_BUF_TABLE_SYM_NAME, 94 num_entries * sizeof(pf->shared_bufs[0]), 95 &sb_desc_area); 96 if (IS_ERR(sb_desc)) 97 return PTR_ERR(sb_desc); 98 99 entry_sz = nfp_cpp_area_size(sb_desc_area) / num_entries; 100 101 pf->shared_bufs = kmalloc_array(num_entries, sizeof(pf->shared_bufs[0]), 102 GFP_KERNEL); 103 if (!pf->shared_bufs) { 104 err = -ENOMEM; 105 goto err_release_area; 106 } 107 108 for (i = 0; i < num_entries; i++) { 109 struct nfp_shared_buf *sb = &pf->shared_bufs[i]; 110 111 /* Entries may be larger in future FW */ 112 memcpy_fromio(sb, sb_desc + i * entry_sz, sizeof(*sb)); 113 114 err = devlink_sb_register(devlink, 115 le32_to_cpu(sb->id), 116 le32_to_cpu(sb->size), 117 le16_to_cpu(sb->ingress_pools_count), 118 le16_to_cpu(sb->egress_pools_count), 119 le16_to_cpu(sb->ingress_tc_count), 120 le16_to_cpu(sb->egress_tc_count)); 121 if (err) 122 goto err_unreg_prev; 123 } 124 pf->num_shared_bufs = num_entries; 125 126 nfp_cpp_area_release_free(sb_desc_area); 127 128 return 0; 129 130 err_unreg_prev: 131 while (i--) 132 devlink_sb_unregister(devlink, 133 le32_to_cpu(pf->shared_bufs[i].id)); 134 kfree(pf->shared_bufs); 135 err_release_area: 136 nfp_cpp_area_release_free(sb_desc_area); 137 return err; 138 } 139 140 void nfp_shared_buf_unregister(struct nfp_pf *pf) 141 { 142 struct devlink *devlink = priv_to_devlink(pf); 143 unsigned int i; 144 145 for (i = 0; i < pf->num_shared_bufs; i++) 146 devlink_sb_unregister(devlink, 147 le32_to_cpu(pf->shared_bufs[i].id)); 148 kfree(pf->shared_bufs); 149 } 150