mirror of https://github.com/torvalds/linux.git
132 lines
4.1 KiB
C
132 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2025 Broadcom.
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include "bng_res.h"
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#include "bng_fw.h"
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#include "bng_sp.h"
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#include "bng_tlv.h"
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static bool bng_re_is_atomic_cap(struct bng_re_rcfw *rcfw)
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{
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u16 pcie_ctl2 = 0;
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pcie_capability_read_word(rcfw->pdev, PCI_EXP_DEVCTL2, &pcie_ctl2);
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return (pcie_ctl2 & PCI_EXP_DEVCTL2_ATOMIC_REQ);
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}
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static void bng_re_query_version(struct bng_re_rcfw *rcfw,
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char *fw_ver)
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{
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struct creq_query_version_resp resp = {};
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struct bng_re_cmdqmsg msg = {};
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struct cmdq_query_version req = {};
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int rc;
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bng_re_rcfw_cmd_prep((struct cmdq_base *)&req,
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CMDQ_BASE_OPCODE_QUERY_VERSION,
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sizeof(req));
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bng_re_fill_cmdqmsg(&msg, &req, &resp, NULL, sizeof(req), sizeof(resp), 0);
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rc = bng_re_rcfw_send_message(rcfw, &msg);
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if (rc)
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return;
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fw_ver[0] = resp.fw_maj;
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fw_ver[1] = resp.fw_minor;
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fw_ver[2] = resp.fw_bld;
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fw_ver[3] = resp.fw_rsvd;
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}
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int bng_re_get_dev_attr(struct bng_re_rcfw *rcfw)
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{
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struct bng_re_dev_attr *attr = rcfw->res->dattr;
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struct creq_query_func_resp resp = {};
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struct bng_re_cmdqmsg msg = {};
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struct creq_query_func_resp_sb *sb;
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struct bng_re_rcfw_sbuf sbuf;
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struct cmdq_query_func req = {};
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u8 *tqm_alloc;
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int i, rc;
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u32 temp;
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bng_re_rcfw_cmd_prep((struct cmdq_base *)&req,
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CMDQ_BASE_OPCODE_QUERY_FUNC,
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sizeof(req));
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sbuf.size = ALIGN(sizeof(*sb), BNG_FW_CMDQE_UNITS);
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sbuf.sb = dma_alloc_coherent(&rcfw->pdev->dev, sbuf.size,
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&sbuf.dma_addr, GFP_KERNEL);
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if (!sbuf.sb)
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return -ENOMEM;
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sb = sbuf.sb;
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req.resp_size = sbuf.size / BNG_FW_CMDQE_UNITS;
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bng_re_fill_cmdqmsg(&msg, &req, &resp, &sbuf, sizeof(req),
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sizeof(resp), 0);
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rc = bng_re_rcfw_send_message(rcfw, &msg);
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if (rc)
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goto bail;
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/* Extract the context from the side buffer */
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attr->max_qp = le32_to_cpu(sb->max_qp);
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/* max_qp value reported by FW doesn't include the QP1 */
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attr->max_qp += 1;
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attr->max_qp_rd_atom =
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sb->max_qp_rd_atom > BNG_RE_MAX_OUT_RD_ATOM ?
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BNG_RE_MAX_OUT_RD_ATOM : sb->max_qp_rd_atom;
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attr->max_qp_init_rd_atom =
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sb->max_qp_init_rd_atom > BNG_RE_MAX_OUT_RD_ATOM ?
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BNG_RE_MAX_OUT_RD_ATOM : sb->max_qp_init_rd_atom;
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attr->max_qp_wqes = le16_to_cpu(sb->max_qp_wr) - 1;
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/* Adjust for max_qp_wqes for variable wqe */
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attr->max_qp_wqes = min_t(u32, attr->max_qp_wqes, BNG_VAR_MAX_WQE - 1);
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attr->max_qp_sges = min_t(u32, sb->max_sge_var_wqe, BNG_VAR_MAX_SGE);
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attr->max_cq = le32_to_cpu(sb->max_cq);
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attr->max_cq_wqes = le32_to_cpu(sb->max_cqe);
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attr->max_cq_sges = attr->max_qp_sges;
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attr->max_mr = le32_to_cpu(sb->max_mr);
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attr->max_mw = le32_to_cpu(sb->max_mw);
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attr->max_mr_size = le64_to_cpu(sb->max_mr_size);
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attr->max_pd = 64 * 1024;
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attr->max_raw_ethy_qp = le32_to_cpu(sb->max_raw_eth_qp);
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attr->max_ah = le32_to_cpu(sb->max_ah);
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attr->max_srq = le16_to_cpu(sb->max_srq);
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attr->max_srq_wqes = le32_to_cpu(sb->max_srq_wr) - 1;
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attr->max_srq_sges = sb->max_srq_sge;
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attr->max_pkey = 1;
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attr->max_inline_data = le32_to_cpu(sb->max_inline_data);
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/*
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* Read the max gid supported by HW.
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* For each entry in HW GID in HW table, we consume 2
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* GID entries in the kernel GID table. So max_gid reported
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* to stack can be up to twice the value reported by the HW, up to 256 gids.
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*/
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attr->max_sgid = le32_to_cpu(sb->max_gid);
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attr->max_sgid = min_t(u32, BNG_RE_NUM_GIDS_SUPPORTED, 2 * attr->max_sgid);
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attr->dev_cap_flags = le16_to_cpu(sb->dev_cap_flags);
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attr->dev_cap_flags2 = le16_to_cpu(sb->dev_cap_ext_flags_2);
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if (_is_max_srq_ext_supported(attr->dev_cap_flags2))
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attr->max_srq += le16_to_cpu(sb->max_srq_ext);
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bng_re_query_version(rcfw, attr->fw_ver);
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for (i = 0; i < BNG_MAX_TQM_ALLOC_REQ / 4; i++) {
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temp = le32_to_cpu(sb->tqm_alloc_reqs[i]);
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tqm_alloc = (u8 *)&temp;
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attr->tqm_alloc_reqs[i * 4] = *tqm_alloc;
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attr->tqm_alloc_reqs[i * 4 + 1] = *(++tqm_alloc);
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attr->tqm_alloc_reqs[i * 4 + 2] = *(++tqm_alloc);
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attr->tqm_alloc_reqs[i * 4 + 3] = *(++tqm_alloc);
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}
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attr->max_dpi = le32_to_cpu(sb->max_dpi);
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attr->is_atomic = bng_re_is_atomic_cap(rcfw);
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bail:
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dma_free_coherent(&rcfw->pdev->dev, sbuf.size,
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sbuf.sb, sbuf.dma_addr);
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return rc;
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}
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