1 /********************************************************************** 2 * Author: Cavium, Inc. 3 * 4 * Contact: support@cavium.com 5 * Please include "LiquidIO" in the subject. 6 * 7 * Copyright (c) 2003-2016 Cavium, Inc. 8 * 9 * This file is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License, Version 2, as 11 * published by the Free Software Foundation. 12 * 13 * This file is distributed in the hope that it will be useful, but 14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty 15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or 16 * NONINFRINGEMENT. See the GNU General Public License for more 17 * details. 18 **********************************************************************/ 19 #include <linux/pci.h> 20 #include <linux/netdevice.h> 21 #include "liquidio_common.h" 22 #include "octeon_droq.h" 23 #include "octeon_iq.h" 24 #include "response_manager.h" 25 #include "octeon_device.h" 26 #include "octeon_nic.h" 27 #include "octeon_main.h" 28 29 void * 30 octeon_alloc_soft_command_resp(struct octeon_device *oct, 31 union octeon_instr_64B *cmd, 32 u32 rdatasize) 33 { 34 struct octeon_soft_command *sc; 35 struct octeon_instr_ih3 *ih3; 36 struct octeon_instr_ih2 *ih2; 37 struct octeon_instr_irh *irh; 38 struct octeon_instr_rdp *rdp; 39 40 sc = (struct octeon_soft_command *) 41 octeon_alloc_soft_command(oct, 0, rdatasize, 0); 42 43 if (!sc) 44 return NULL; 45 46 /* Copy existing command structure into the soft command */ 47 memcpy(&sc->cmd, cmd, sizeof(union octeon_instr_64B)); 48 49 /* Add in the response related fields. Opcode and Param are already 50 * there. 51 */ 52 if (OCTEON_CN23XX_PF(oct)) { 53 ih3 = (struct octeon_instr_ih3 *)&sc->cmd.cmd3.ih3; 54 rdp = (struct octeon_instr_rdp *)&sc->cmd.cmd3.rdp; 55 irh = (struct octeon_instr_irh *)&sc->cmd.cmd3.irh; 56 /*pkiih3 + irh + ossp[0] + ossp[1] + rdp + rptr = 40 bytes */ 57 ih3->fsz = LIO_SOFTCMDRESP_IH3; 58 } else { 59 ih2 = (struct octeon_instr_ih2 *)&sc->cmd.cmd2.ih2; 60 rdp = (struct octeon_instr_rdp *)&sc->cmd.cmd2.rdp; 61 irh = (struct octeon_instr_irh *)&sc->cmd.cmd2.irh; 62 /* irh + ossp[0] + ossp[1] + rdp + rptr = 40 bytes */ 63 ih2->fsz = LIO_SOFTCMDRESP_IH2; 64 } 65 66 irh->rflag = 1; /* a response is required */ 67 68 rdp->pcie_port = oct->pcie_port; 69 rdp->rlen = rdatasize; 70 71 *sc->status_word = COMPLETION_WORD_INIT; 72 73 if (OCTEON_CN23XX_PF(oct)) 74 sc->cmd.cmd3.rptr = sc->dmarptr; 75 else 76 sc->cmd.cmd2.rptr = sc->dmarptr; 77 78 sc->wait_time = 1000; 79 sc->timeout = jiffies + sc->wait_time; 80 81 return sc; 82 } 83 84 int octnet_send_nic_data_pkt(struct octeon_device *oct, 85 struct octnic_data_pkt *ndata) 86 { 87 int ring_doorbell = 1; 88 89 return octeon_send_command(oct, ndata->q_no, ring_doorbell, &ndata->cmd, 90 ndata->buf, ndata->datasize, 91 ndata->reqtype); 92 } 93 94 static void octnet_link_ctrl_callback(struct octeon_device *oct, 95 u32 status, 96 void *sc_ptr) 97 { 98 struct octeon_soft_command *sc = (struct octeon_soft_command *)sc_ptr; 99 struct octnic_ctrl_pkt *nctrl; 100 101 nctrl = (struct octnic_ctrl_pkt *)sc->ctxptr; 102 103 /* Call the callback function if status is OK. 104 * Status is OK only if a response was expected and core returned 105 * success. 106 * If no response was expected, status is OK if the command was posted 107 * successfully. 108 */ 109 if (!status && nctrl->cb_fn) 110 nctrl->cb_fn(nctrl); 111 112 octeon_free_soft_command(oct, sc); 113 } 114 115 static inline struct octeon_soft_command 116 *octnic_alloc_ctrl_pkt_sc(struct octeon_device *oct, 117 struct octnic_ctrl_pkt *nctrl) 118 { 119 struct octeon_soft_command *sc = NULL; 120 u8 *data; 121 u32 rdatasize; 122 u32 uddsize = 0, datasize = 0; 123 124 uddsize = (u32)(nctrl->ncmd.s.more * 8); 125 126 datasize = OCTNET_CMD_SIZE + uddsize; 127 rdatasize = (nctrl->wait_time) ? 16 : 0; 128 129 sc = (struct octeon_soft_command *) 130 octeon_alloc_soft_command(oct, datasize, rdatasize, 131 sizeof(struct octnic_ctrl_pkt)); 132 133 if (!sc) 134 return NULL; 135 136 memcpy(sc->ctxptr, nctrl, sizeof(struct octnic_ctrl_pkt)); 137 138 data = (u8 *)sc->virtdptr; 139 140 memcpy(data, &nctrl->ncmd, OCTNET_CMD_SIZE); 141 142 octeon_swap_8B_data((u64 *)data, (OCTNET_CMD_SIZE >> 3)); 143 144 if (uddsize) { 145 /* Endian-Swap for UDD should have been done by caller. */ 146 memcpy(data + OCTNET_CMD_SIZE, nctrl->udd, uddsize); 147 } 148 149 sc->iq_no = (u32)nctrl->iq_no; 150 151 octeon_prepare_soft_command(oct, sc, OPCODE_NIC, OPCODE_NIC_CMD, 152 0, 0, 0); 153 154 sc->callback = octnet_link_ctrl_callback; 155 sc->callback_arg = sc; 156 sc->wait_time = nctrl->wait_time; 157 158 return sc; 159 } 160 161 int 162 octnet_send_nic_ctrl_pkt(struct octeon_device *oct, 163 struct octnic_ctrl_pkt *nctrl) 164 { 165 int retval; 166 struct octeon_soft_command *sc = NULL; 167 168 spin_lock_bh(&oct->cmd_resp_wqlock); 169 /* Allow only rx ctrl command to stop traffic on the chip 170 * during offline operations 171 */ 172 if ((oct->cmd_resp_state == OCT_DRV_OFFLINE) && 173 (nctrl->ncmd.s.cmd != OCTNET_CMD_RX_CTL)) { 174 spin_unlock_bh(&oct->cmd_resp_wqlock); 175 dev_err(&oct->pci_dev->dev, 176 "%s cmd:%d not processed since driver offline\n", 177 __func__, nctrl->ncmd.s.cmd); 178 return -1; 179 } 180 181 sc = octnic_alloc_ctrl_pkt_sc(oct, nctrl); 182 if (!sc) { 183 dev_err(&oct->pci_dev->dev, "%s soft command alloc failed\n", 184 __func__); 185 spin_unlock_bh(&oct->cmd_resp_wqlock); 186 return -1; 187 } 188 189 retval = octeon_send_soft_command(oct, sc); 190 if (retval == IQ_SEND_FAILED) { 191 octeon_free_soft_command(oct, sc); 192 dev_err(&oct->pci_dev->dev, "%s pf_num:%d soft command:%d send failed status: %x\n", 193 __func__, oct->pf_num, nctrl->ncmd.s.cmd, retval); 194 spin_unlock_bh(&oct->cmd_resp_wqlock); 195 return -1; 196 } 197 198 spin_unlock_bh(&oct->cmd_resp_wqlock); 199 return retval; 200 } 201