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) || OCTEON_CN23XX_VF(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) || OCTEON_CN23XX_VF(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 int xmit_more) 87 { 88 int ring_doorbell = !xmit_more; 89 90 return octeon_send_command(oct, ndata->q_no, ring_doorbell, &ndata->cmd, 91 ndata->buf, ndata->datasize, 92 ndata->reqtype); 93 } 94 95 static void octnet_link_ctrl_callback(struct octeon_device *oct, 96 u32 status, 97 void *sc_ptr) 98 { 99 struct octeon_soft_command *sc = (struct octeon_soft_command *)sc_ptr; 100 struct octnic_ctrl_pkt *nctrl; 101 102 nctrl = (struct octnic_ctrl_pkt *)sc->ctxptr; 103 104 /* Call the callback function if status is zero (meaning OK) or status 105 * contains a firmware status code bigger than zero (meaning the 106 * firmware is reporting an error). 107 * If no response was expected, status is OK if the command was posted 108 * successfully. 109 */ 110 if ((!status || status > FIRMWARE_STATUS_CODE(0)) && nctrl->cb_fn) { 111 nctrl->status = status; 112 nctrl->cb_fn(nctrl); 113 } 114 115 octeon_free_soft_command(oct, sc); 116 } 117 118 static inline struct octeon_soft_command 119 *octnic_alloc_ctrl_pkt_sc(struct octeon_device *oct, 120 struct octnic_ctrl_pkt *nctrl) 121 { 122 struct octeon_soft_command *sc = NULL; 123 u8 *data; 124 u32 rdatasize; 125 u32 uddsize = 0, datasize = 0; 126 127 uddsize = (u32)(nctrl->ncmd.s.more * 8); 128 129 datasize = OCTNET_CMD_SIZE + uddsize; 130 rdatasize = (nctrl->wait_time) ? 16 : 0; 131 132 sc = (struct octeon_soft_command *) 133 octeon_alloc_soft_command(oct, datasize, rdatasize, 134 sizeof(struct octnic_ctrl_pkt)); 135 136 if (!sc) 137 return NULL; 138 139 memcpy(sc->ctxptr, nctrl, sizeof(struct octnic_ctrl_pkt)); 140 141 data = (u8 *)sc->virtdptr; 142 143 memcpy(data, &nctrl->ncmd, OCTNET_CMD_SIZE); 144 145 octeon_swap_8B_data((u64 *)data, (OCTNET_CMD_SIZE >> 3)); 146 147 if (uddsize) { 148 /* Endian-Swap for UDD should have been done by caller. */ 149 memcpy(data + OCTNET_CMD_SIZE, nctrl->udd, uddsize); 150 } 151 152 sc->iq_no = (u32)nctrl->iq_no; 153 154 octeon_prepare_soft_command(oct, sc, OPCODE_NIC, OPCODE_NIC_CMD, 155 0, 0, 0); 156 157 sc->callback = octnet_link_ctrl_callback; 158 sc->callback_arg = sc; 159 sc->wait_time = nctrl->wait_time; 160 161 return sc; 162 } 163 164 int 165 octnet_send_nic_ctrl_pkt(struct octeon_device *oct, 166 struct octnic_ctrl_pkt *nctrl) 167 { 168 int retval; 169 struct octeon_soft_command *sc = NULL; 170 171 spin_lock_bh(&oct->cmd_resp_wqlock); 172 /* Allow only rx ctrl command to stop traffic on the chip 173 * during offline operations 174 */ 175 if ((oct->cmd_resp_state == OCT_DRV_OFFLINE) && 176 (nctrl->ncmd.s.cmd != OCTNET_CMD_RX_CTL)) { 177 spin_unlock_bh(&oct->cmd_resp_wqlock); 178 dev_err(&oct->pci_dev->dev, 179 "%s cmd:%d not processed since driver offline\n", 180 __func__, nctrl->ncmd.s.cmd); 181 return -1; 182 } 183 184 sc = octnic_alloc_ctrl_pkt_sc(oct, nctrl); 185 if (!sc) { 186 dev_err(&oct->pci_dev->dev, "%s soft command alloc failed\n", 187 __func__); 188 spin_unlock_bh(&oct->cmd_resp_wqlock); 189 return -1; 190 } 191 192 retval = octeon_send_soft_command(oct, sc); 193 if (retval == IQ_SEND_FAILED) { 194 octeon_free_soft_command(oct, sc); 195 dev_err(&oct->pci_dev->dev, "%s pf_num:%d soft command:%d send failed status: %x\n", 196 __func__, oct->pf_num, nctrl->ncmd.s.cmd, retval); 197 spin_unlock_bh(&oct->cmd_resp_wqlock); 198 return -1; 199 } 200 201 spin_unlock_bh(&oct->cmd_resp_wqlock); 202 return retval; 203 } 204