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[SCSI] megaraid_sas: cleanup queue command path
This patch (originally submitted by Christoph Hellwig) removes code duplication in megasas_build_cmd. It also defines MEGASAS_IOC_FIRMWARE32 to allow 64 bit compiled applications to work. Signed-off-by: Sumant Patro <Sumant.Patro@lsil.com> Rejections fixed and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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Sumant Patro
James Bottomley
parent
bb1d1073a1
commit
cb59aa6a7c
15
Documentation/scsi/ChangeLog.megaraid_sas
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15
Documentation/scsi/ChangeLog.megaraid_sas
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@ -0,0 +1,15 @@
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1 Release Date : Mon Dec 19 14:36:26 PST 2005 - Sumant Patro <Sumant.Patro@lsil.com>
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2 Current Version : 00.00.02.00-rc4
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3 Older Version : 00.00.02.01
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i. Code reorganized to remove code duplication in megasas_build_cmd.
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"There's a lot of duplicate code megasas_build_cmd. Move that out of the different codepathes and merge the reminder of megasas_build_cmd into megasas_queue_command"
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- Christoph Hellwig <hch@lst.de>
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ii. Defined MEGASAS_IOC_FIRMWARE32 for code paths that handles 32 bit applications in 64 bit systems.
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"MEGASAS_IOC_FIRMWARE can't be redefined if CONFIG_COMPAT is set, we need to define a MEGASAS_IOC_FIRMWARE32 define so native binaries continue to work"
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- Christoph Hellwig <hch@lst.de>
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@ -10,7 +10,7 @@
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* 2 of the License, or (at your option) any later version.
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*
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* FILE : megaraid_sas.c
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* Version : v00.00.02.00-rc4
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* Version : v00.00.02.01
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*
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* Authors:
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* Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
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@ -558,112 +558,29 @@ megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
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}
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/**
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* megasas_build_cmd - Prepares a command packet
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* @instance: Adapter soft state
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* @scp: SCSI command
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* @frame_count: [OUT] Number of frames used to prepare this command
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* megasas_is_ldio - Checks if the cmd is for logical drive
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* @scmd: SCSI command
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*
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* Called by megasas_queue_command to find out if the command to be queued
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* is a logical drive command
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*/
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static struct megasas_cmd *megasas_build_cmd(struct megasas_instance
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*instance,
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struct scsi_cmnd *scp,
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int *frame_count)
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static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
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{
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u32 logical_cmd;
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struct megasas_cmd *cmd;
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/*
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* Find out if this is logical or physical drive command.
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*/
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logical_cmd = MEGASAS_IS_LOGICAL(scp);
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/*
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* Logical drive command
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*/
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if (logical_cmd) {
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if (scp->device->id >= MEGASAS_MAX_LD) {
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scp->result = DID_BAD_TARGET << 16;
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return NULL;
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}
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switch (scp->cmnd[0]) {
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case READ_10:
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case WRITE_10:
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case READ_12:
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case WRITE_12:
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case READ_6:
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case WRITE_6:
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case READ_16:
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case WRITE_16:
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/*
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* Fail for LUN > 0
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*/
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if (scp->device->lun) {
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scp->result = DID_BAD_TARGET << 16;
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return NULL;
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}
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cmd = megasas_get_cmd(instance);
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if (!cmd) {
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scp->result = DID_IMM_RETRY << 16;
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return NULL;
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}
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*frame_count = megasas_build_ldio(instance, scp, cmd);
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if (!(*frame_count)) {
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megasas_return_cmd(instance, cmd);
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return NULL;
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}
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return cmd;
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default:
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/*
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* Fail for LUN > 0
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*/
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if (scp->device->lun) {
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scp->result = DID_BAD_TARGET << 16;
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return NULL;
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}
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cmd = megasas_get_cmd(instance);
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if (!cmd) {
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scp->result = DID_IMM_RETRY << 16;
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return NULL;
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}
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*frame_count = megasas_build_dcdb(instance, scp, cmd);
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if (!(*frame_count)) {
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megasas_return_cmd(instance, cmd);
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return NULL;
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}
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return cmd;
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}
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} else {
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cmd = megasas_get_cmd(instance);
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if (!cmd) {
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scp->result = DID_IMM_RETRY << 16;
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return NULL;
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}
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*frame_count = megasas_build_dcdb(instance, scp, cmd);
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if (!(*frame_count)) {
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megasas_return_cmd(instance, cmd);
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return NULL;
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}
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return cmd;
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if (!MEGASAS_IS_LOGICAL(cmd))
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return 0;
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switch (cmd->cmnd[0]) {
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case READ_10:
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case WRITE_10:
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case READ_12:
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case WRITE_12:
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case READ_6:
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case WRITE_6:
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case READ_16:
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case WRITE_16:
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return 1;
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default:
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return 0;
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}
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return NULL;
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}
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/**
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@ -684,13 +601,27 @@ megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
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scmd->scsi_done = done;
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scmd->result = 0;
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cmd = megasas_build_cmd(instance, scmd, &frame_count);
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if (!cmd) {
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done(scmd);
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return 0;
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if (MEGASAS_IS_LOGICAL(scmd) &&
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(scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
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scmd->result = DID_BAD_TARGET << 16;
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goto out_done;
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}
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cmd = megasas_get_cmd(instance);
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if (!cmd)
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return SCSI_MLQUEUE_HOST_BUSY;
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/*
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* Logical drive command
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*/
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if (megasas_is_ldio(scmd))
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frame_count = megasas_build_ldio(instance, scmd, cmd);
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else
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frame_count = megasas_build_dcdb(instance, scmd, cmd);
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if (!frame_count)
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goto out_return_cmd;
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cmd->scmd = scmd;
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scmd->SCp.ptr = (char *)cmd;
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scmd->SCp.sent_command = jiffies;
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@ -706,6 +637,12 @@ megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
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&instance->reg_set->inbound_queue_port);
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return 0;
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out_return_cmd:
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megasas_return_cmd(instance, cmd);
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out_done:
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done(scmd);
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return 0;
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}
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/**
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@ -2681,9 +2618,8 @@ megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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switch (cmd) {
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case MEGASAS_IOC_FIRMWARE:{
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return megasas_mgmt_compat_ioctl_fw(file, arg);
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}
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case MEGASAS_IOC_FIRMWARE32:
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return megasas_mgmt_compat_ioctl_fw(file, arg);
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case MEGASAS_IOC_GET_AEN:
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return megasas_mgmt_ioctl_aen(file, arg);
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}
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@ -18,10 +18,9 @@
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/**
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* MegaRAID SAS Driver meta data
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*/
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#define MEGASAS_VERSION "00.00.02.00-rc4"
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#define MEGASAS_RELDATE "Sep 16, 2005"
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#define MEGASAS_EXT_VERSION "Fri Sep 16 12:37:08 EDT 2005"
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#define MEGASAS_VERSION "00.00.02.01"
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#define MEGASAS_RELDATE "Dec 19, 2005"
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#define MEGASAS_EXT_VERSION "Mon Dec 19 14:36:26 PST 2005"
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/*
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* =====================================
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* MegaRAID SAS MFI firmware definitions
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@ -1125,11 +1124,10 @@ struct compat_megasas_iocpacket {
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struct compat_iovec sgl[MAX_IOCTL_SGE];
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} __attribute__ ((packed));
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#define MEGASAS_IOC_FIRMWARE _IOWR('M', 1, struct compat_megasas_iocpacket)
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#else
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#define MEGASAS_IOC_FIRMWARE _IOWR('M', 1, struct megasas_iocpacket)
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#endif
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#define MEGASAS_IOC_FIRMWARE _IOWR('M', 1, struct megasas_iocpacket)
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#define MEGASAS_IOC_FIRMWARE32 _IOWR('M', 1, struct compat_megasas_iocpacket)
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#define MEGASAS_IOC_GET_AEN _IOW('M', 3, struct megasas_aen)
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struct megasas_mgmt_info {
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