From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.2 required=3.0 tests=BAYES_00,DATE_IN_PAST_06_12, DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MIME_HEADER_CTYPE_ONLY,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, T_TVD_MIME_NO_HEADERS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 09523C43457 for ; Mon, 19 Oct 2020 14:37:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 982EE21D6C for ; Mon, 19 Oct 2020 14:37:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="P2FolW0b" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729594AbgJSOh1 (ORCPT ); Mon, 19 Oct 2020 10:37:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42660 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729223AbgJSOh1 (ORCPT ); Mon, 19 Oct 2020 10:37:27 -0400 Received: from mail-pl1-x643.google.com (mail-pl1-x643.google.com [IPv6:2607:f8b0:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7966AC0613CE for ; Mon, 19 Oct 2020 07:37:27 -0700 (PDT) Received: by mail-pl1-x643.google.com with SMTP id d23so5074410pll.7 for ; Mon, 19 Oct 2020 07:37:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=8Eqx3Afdj9u2zEIuZxiSYB4U+oIZC9E6eEIwXl7RAZE=; b=P2FolW0bKiWtOpEyZMmFKNvqZ2QYLh7pi5azmW02NJVzCn7h3X7IY2Ui6JLr0s1PVR PzHT8y6quARgUJSD6BGYru94Q5ArhKCFBqfyXm2hQ+zaKUFyZzrmCDflhYW6ng8c2556 B+ViHUvAgQhSiPge2W8cy2EaeMyVaHH7sKljY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=8Eqx3Afdj9u2zEIuZxiSYB4U+oIZC9E6eEIwXl7RAZE=; b=VK2EiJS2V6RMkhh0yu2LheqjAoBt4r29mkvoZwI/6vv35+imqaMRLgMweS6Ec715Zx Rz2QsPh/D1jpmvxpzdzRIwepa8jPxvDQEO3mf/Q9qQqMxZ+sKyly56QVIfwF1YzWGroY TfDra+1ZDCRhTOztcKxhxvJihfIyGAneKk32RgEFeHFa0hGGF0sJvH0NBk/MiBjFmT6R m4C1QQ4XAEfsWIVDHpvFtAZkyt3TE0FfNGAZv+SzVo27/omJeUPB0hgj6U9yR7eMCSrE YWAH5AmgER7uQ8wxbX0G6CcQg+b5qbq9ueUALz2PQNEAsKuSN7BHBo4vu1t+CGH78ySn 7twg== X-Gm-Message-State: AOAM532dme7zA7/lr13vET/ozbCNfaLHV7b7bjGzcztV0dAeCue9BTzL 7OKiX0TNiv8hEY/aQHDNiIug7BdFyaW2HmKuxqmcKJnE4xb0rcm3ga3Zv3kw/XM2yK0e0aKxy4H UCbXnXW3mycsKPIxjZMU43bv7H+cbpgUFjJpSW4bl7Uvu7xH8KUWWGjmdoWXW+KdTBGB3wTEWpD UeHANuvw8anEL+ X-Google-Smtp-Source: ABdhPJxSPq3JeikxAJPlzvqPNjElLQchDdJu4htgztziD6ywlzN9vtNBGD/qKtXxdLtKRBp0mJ5yeA== X-Received: by 2002:a17:90a:6683:: with SMTP id m3mr50309pjj.225.1603118246544; Mon, 19 Oct 2020 07:37:26 -0700 (PDT) Received: from localhost.localdomain ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id kb15sm53377pjb.17.2020.10.19.07.37.23 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 19 Oct 2020 07:37:25 -0700 (PDT) From: Muneendra To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, tj@kernel.org, linux-nvme@lists.infradead.org Cc: jsmart2021@gmail.com, emilne@redhat.com, mkumar@redhat.com, pbonzini@redhat.com, Gaurav Srivastava Subject: [RFC v2 13/18] lpfc: vmid: Functions to manage vmids Date: Mon, 19 Oct 2020 13:13:08 +0530 Message-Id: <1603093393-12875-14-git-send-email-muneendra.kumar@broadcom.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1603093393-12875-1-git-send-email-muneendra.kumar@broadcom.com> References: <1603093393-12875-1-git-send-email-muneendra.kumar@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000a56a5205b2070dbe" Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org --000000000000a56a5205b2070dbe From: Gaurav Srivastava This patch contains the routines to save, retrieve and remove the vmids from the data structure. A hash table is used to save the vmids and the corresponding UUIDs associated with the application/VMs. Signed-off-by: Gaurav Srivastava Signed-off-by: James Smart --- v2: Ported the patch on top of 5.10/scsi-queue --- drivers/scsi/lpfc/lpfc_scsi.c | 139 ++++++++++++++++++++++++++++++++++ 1 file changed, 139 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 7bc1fd69b715..e5a1056cc575 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include @@ -4485,6 +4486,144 @@ void lpfc_poll_timeout(struct timer_list *t) } } +/* + * lpfc_get_vmid_from_hastable - search the UUID in the hash table + * @vport: The virtual port for which this call is being executed. + * @hash: calculated hash value + * @buf: uuid associated with the VE + * Returns the vmid entry associated with the UUID + * Make sure to acquire the appropriate lock before invoking this routine. + */ +struct lpfc_vmid *lpfc_get_vmid_from_hastable(struct lpfc_vport *vport, + u32 hash, u8 *buf) +{ + struct lpfc_vmid *vmp; + u16 count = 0; + + while (count < LPFC_VMID_HASH_SIZE) { + vmp = vport->hash_table[hash]; + if (vmp) { + if (strncmp(&vmp->host_vmid[0], buf, 16) == 0) + return vmp; + } else { + return NULL; + } + /* search the next available slot and continue till entry */ + /* is found */ + count++; + hash++; + + /* or the end is reached */ + if (hash == LPFC_VMID_HASH_SIZE) + hash = 0; + } + return NULL; +} + +/* + * lpfc_put_vmid_from_hastable - put the VMID in the hash table + * @vport: The virtual port for which this call is being executed. + * @hash - calculated hash value + * @vmp: Pointer to a VMID entry representing a VM sending IO + * + * This routine will insert the newly acquired vmid entity in the hash table. + * Make sure to acquire the appropriate lock before invoking this routine. + */ +int +lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash, + struct lpfc_vmid *vmp) +{ + int count = 0; + + while (count < LPFC_VMID_HASH_SIZE) { + if (!vport->hash_table[hash]) { + vport->hash_table[hash] = vmp; + vmp->hash_index = hash; + return 1; + } + /* if the slot is already occupied, a collision has occurred. */ + /* Store in the next available slot */ + count++; + hash++; + /* table is full */ + if (hash == LPFC_VMID_HASH_SIZE) + hash = 0; + } + return 0; +} + +/* + * lpfc_vmid_hash_fn- creates a hash value of the UUID + * @uuid: uuid associated with the VE + * @len: length of the UUID + * Returns the calculated hash value + */ +int lpfc_vmid_hash_fn(char *vmid, int len) +{ + int c; + int hash = 0; + + if (len == 0) + return 0; + while (len--) { + c = *vmid++; + if (c >= 'A' && c <= 'Z') + c += 'a' - 'A'; + + hash = (hash + (c << LPFC_VMID_HASH_SHIFT) + + (c >> LPFC_VMID_HASH_SHIFT)) * 19; + } + + return hash & LPFC_VMID_HASH_MASK; +} + +/* + * lpfc_vmid_update_entry - update the vmid entry in the hash table + * @vport: The virtual port for which this call is being executed. + * @cmd: address of scsi cmmd descriptor + * @vmp: Pointer to a VMID entry representing a VM sending IO + * @tag: VMID tag + */ +void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd + *cmd, struct lpfc_vmid *vmp, + union lpfc_vmid_io_tag *tag) +{ + u64 *lta; + + if (vport->vmid_priority_tagging) + tag->cs_ctl_vmid = vmp->un.cs_ctl_vmid; + else + tag->app_id = vmp->un.app_id; + + if (cmd->sc_data_direction == DMA_TO_DEVICE) + vmp->io_wr_cnt++; + else + vmp->io_rd_cnt++; + + /* update the last access timestamp in the table */ + lta = per_cpu_ptr(vmp->last_io_time, raw_smp_processor_id()); + *lta = jiffies; +} + +void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport, struct lpfc_vmid *vmid) +{ + u32 hash; + struct lpfc_vmid *pvmid; + + if (vport->port_type == LPFC_PHYSICAL_PORT) { + vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport); + } else { + hash = lpfc_vmid_hash_fn(vmid->host_vmid, vmid->vmid_len); + pvmid = + lpfc_get_vmid_from_hastable(vport->phba->pport, hash, + vmid->host_vmid); + if (!pvmid) + vmid->un.cs_ctl_vmid = pvmid->un.cs_ctl_vmid; + else + vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport); + } +} + /** * lpfc_queuecommand - scsi_host_template queuecommand entry point * @cmnd: Pointer to scsi_cmnd data structure. -- 2.26.2 --000000000000a56a5205b2070dbe Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQTQYJKoZIhvcNAQcCoIIQPjCCEDoCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg2iMIIE6DCCA9CgAwIBAgIOSBtqCRO9gCTKXSLwFPMwDQYJKoZIhvcNAQELBQAwTDEgMB4GA1UE CxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMT Ckdsb2JhbFNpZ24wHhcNMTYwNjE1MDAwMDAwWhcNMjQwNjE1MDAwMDAwWjBdMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEzMDEGA1UEAxMqR2xvYmFsU2lnbiBQZXJzb25h 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