megaraid_sas: FW transition and q size changes
Subsystems (2)
PATCH 1/6 megaraid_sas: FW transition and q size changes
Resubmitting with one addition (item f mentioned below)
This patch has the following enhancements :
a. handles new transition states of FW to support controller hotplug. b. It reduces by 1 the maximum cmds that the driver may send to FW. c. Sends "Stop Processing" cmd to FW before returning failure from reset routine d. Adds print in megasas_transition routine
e. Sends "RESET" flag to FW to do a soft reset of controller
to move from Operational to Ready state.
f. Sending correct pointer (cmd->sense) to pci_pool_free
This patch has been generated on latest scsi-misc git.Signed-off-by Sumant Patro <[email protected]>
drivers/scsi/megaraid/megaraid_sas.c 2006-10-02 10:16:40.000000000 -0700 renamed from drivers/scsi/megaraid/megaraid_sas.c 2006-10-02 10:15:31.000000000 -0700 +29 -6
@@ -832,6 +832,12 @@ static int megasas_wait_for_outstanding( } if (atomic_read(&instance->fw_outstanding)) { + /* + * Send signal to FW to stop processing any pending cmds. + * The controller will be taken offline by the OS now. + */ + writel(MFI_STOP_ADP, + &instance->reg_set->inbound_doorbell); instance->hw_crit_error = 1; return FAILED; }
@@ -1229,10 +1235,12 @@ megasas_transition_to_ready(struct megas fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK; + if (fw_state != MFI_STATE_READY) + printk(KERN_INFO "megasas: Waiting for FW to come to ready" + " state\n"); + while (fw_state != MFI_STATE_READY) { - printk(KERN_INFO "megasas: Waiting for FW to come to ready" - " state\n"); switch (fw_state) { case MFI_STATE_FAULT:
@@ -1244,19 +1252,27 @@ megasas_transition_to_ready(struct megas /* * Set the CLR bit in inbound doorbell */ - writel(MFI_INIT_CLEAR_HANDSHAKE, + writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG, &instance->reg_set->inbound_doorbell); max_wait = 2; cur_state = MFI_STATE_WAIT_HANDSHAKE; break; + case MFI_STATE_BOOT_MESSAGE_PENDING: + writel(MFI_INIT_HOTPLUG, + &instance->reg_set->inbound_doorbell); + + max_wait = 10; + cur_state = MFI_STATE_BOOT_MESSAGE_PENDING; + break; + case MFI_STATE_OPERATIONAL: /* - * Bring it to READY state; assuming max wait 2 secs + * Bring it to READY state; assuming max wait 10 secs */ megasas_disable_intr(instance); - writel(MFI_INIT_READY, &instance->reg_set->inbound_doorbell); + writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell); max_wait = 10; cur_state = MFI_STATE_OPERATIONAL;
@@ -1323,6 +1339,7 @@ megasas_transition_to_ready(struct megas return -ENODEV; } }; + printk(KERN_INFO "megasas: FW now in Ready state\n"); return 0; }
@@ -1352,7 +1369,7 @@ static void megasas_teardown_frame_pool( cmd->frame_phys_addr); if (cmd->sense) - pci_pool_free(instance->sense_dma_pool, cmd->frame, + pci_pool_free(instance->sense_dma_pool, cmd->sense, cmd->sense_phys_addr); }
@@ -1690,6 +1707,12 @@ static int megasas_init_mfi(struct megas * Get various operational parameters from status register */ instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF; + /* + * Reduce the max supported cmds by 1. This is to ensure that the + * reply_q_sz (1 more than the max cmd that driver may send) + * does not exceed max cmds that the FW can support + */ + instance->max_fw_cmds = instance->max_fw_cmds-1; instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >> 0x10; /*
drivers/scsi/megaraid/megaraid_sas.h +9 -2
@@ -50,6 +50,7 @@#define MFI_STATE_WAIT_HANDSHAKE 0x60000000#define MFI_STATE_FW_INIT_2 0x70000000#define MFI_STATE_DEVICE_SCAN 0x80000000 +#define MFI_STATE_BOOT_MESSAGE_PENDING 0x90000000#define MFI_STATE_FLUSH_CACHE 0xA0000000#define MFI_STATE_READY 0xB0000000#define MFI_STATE_OPERATIONAL 0xC0000000
@@ -64,12 +65,18 @@* READY : Move from OPERATIONAL to READY state; discard queue info * MFIMODE : Discard (possible) low MFA posted in 64-bit mode (??) * CLR_HANDSHAKE: FW is waiting for HANDSHAKE from BIOS or Driver +* HOTPLUG : Resume from Hotplug +* MFI_STOP_ADP : Send signal to FW to stop processing */ -#define MFI_INIT_ABORT 0x00000000 +#define MFI_INIT_ABORT 0x00000001#define MFI_INIT_READY 0x00000002#define MFI_INIT_MFIMODE 0x00000004#define MFI_INIT_CLEAR_HANDSHAKE 0x00000008 -#define MFI_RESET_FLAGS MFI_INIT_READY|MFI_INIT_MFIMODE +#define MFI_INIT_HOTPLUG 0x00000010 +#define MFI_STOP_ADP 0x00000020 +#define MFI_RESET_FLAGS MFI_INIT_READY| \ + MFI_INIT_MFIMODE| \ + MFI_INIT_ABORT/** * MFI frame flags
drivers/scsi/megaraid/megaraid_sas.c +29 -6
@@ -832,6 +832,12 @@ static int megasas_wait_for_outstanding( }if (atomic_read (&instance->fw_outstanding)) { +/* +* Send signal to FW to stop processing any pending cmds. +* The controller will be taken offline by the OS now. +*/ +writel (MFI_STOP_ADP , + &instance->reg_set->inbound_doorbell); instance->hw_crit_error =1 ;return FAILED ; }
@@ -1229,10 +1235,12 @@ megasas_transition_to_ready(struct megas fw_state = instance->instancet->read_fw_status_reg (instance->reg_set) &MFI_STATE_MASK ; +if (fw_state !=MFI_STATE_READY ) +printk (KERN_INFO "megasas: Waiting for FW to come to ready" +" state\n" ); +while (fw_state !=MFI_STATE_READY ) { -printk (KERN_INFO "megasas: Waiting for FW to come to ready" -" state\n" );switch (fw_state) {case MFI_STATE_FAULT :
@@ -1244,19 +1252,27 @@ megasas_transition_to_ready(struct megas/* * Set the CLR bit in inbound doorbell */ -writel (MFI_INIT_CLEAR_HANDSHAKE , +writel (MFI_INIT_CLEAR_HANDSHAKE |MFI_INIT_HOTPLUG , &instance->reg_set->inbound_doorbell); max_wait =2 ; cur_state =MFI_STATE_WAIT_HANDSHAKE ;break ; +case MFI_STATE_BOOT_MESSAGE_PENDING : +writel (MFI_INIT_HOTPLUG , + &instance->reg_set->inbound_doorbell); + + max_wait =10 ; + cur_state =MFI_STATE_BOOT_MESSAGE_PENDING ; +break ; +case MFI_STATE_OPERATIONAL :/* -* Bring it to READY state; assuming max wait 2 secs +* Bring it to READY state; assuming max wait 10 secs */ megasas_disable_intr (instance); -writel (MFI_INIT_READY , &instance->reg_set->inbound_doorbell); +writel (MFI_RESET_FLAGS , &instance->reg_set->inbound_doorbell); max_wait =10 ; cur_state =MFI_STATE_OPERATIONAL ;
@@ -1323,6 +1339,7 @@ megasas_transition_to_ready(struct megasreturn -ENODEV ; } }; +printk (KERN_INFO "megasas: FW now in Ready state\n" );return 0 ; }
@@ -1352,7 +1369,7 @@ static void megasas_teardown_frame_pool( cmd->frame_phys_addr);if (cmd->sense) -pci_pool_free (instance->sense_dma_pool, cmd->frame, +pci_pool_free (instance->sense_dma_pool, cmd->sense, cmd->sense_phys_addr); }
@@ -1690,6 +1707,12 @@ static int megasas_init_mfi(struct megas* Get various operational parameters from status register */ instance->max_fw_cmds = instance->instancet->read_fw_status_reg (reg_set) &0x00FFFF ; +/* +* Reduce the max supported cmds by 1. This is to ensure that the +* reply_q_sz (1 more than the max cmd that driver may send) +* does not exceed max cmds that the FW can support +*/ + instance->max_fw_cmds = instance->max_fw_cmds-1 ; instance->max_num_sge = (instance->instancet->read_fw_status_reg (reg_set) &0xFF0000 ) >>0x10 ;/*
drivers/scsi/megaraid/megaraid_sas.h +9 -2
@@ -50,6 +50,7 @@#define MFI_STATE_WAIT_HANDSHAKE 0x60000000#define MFI_STATE_FW_INIT_2 0x70000000#define MFI_STATE_DEVICE_SCAN 0x80000000 +#define MFI_STATE_BOOT_MESSAGE_PENDING 0x90000000#define MFI_STATE_FLUSH_CACHE 0xA0000000#define MFI_STATE_READY 0xB0000000#define MFI_STATE_OPERATIONAL 0xC0000000
@@ -64,12 +65,18 @@* READY : Move from OPERATIONAL to READY state; discard queue info * MFIMODE : Discard (possible) low MFA posted in 64-bit mode (??) * CLR_HANDSHAKE: FW is waiting for HANDSHAKE from BIOS or Driver +* HOTPLUG : Resume from Hotplug +* MFI_STOP_ADP : Send signal to FW to stop processing */ -#define MFI_INIT_ABORT 0x00000000 +#define MFI_INIT_ABORT 0x00000001#define MFI_INIT_READY 0x00000002#define MFI_INIT_MFIMODE 0x00000004#define MFI_INIT_CLEAR_HANDSHAKE 0x00000008 -#define MFI_RESET_FLAGS MFI_INIT_READY|MFI_INIT_MFIMODE +#define MFI_INIT_HOTPLUG 0x00000010 +#define MFI_STOP_ADP 0x00000020 +#define MFI_RESET_FLAGS MFI_INIT_READY| \ + MFI_INIT_MFIMODE| \ + MFI_INIT_ABORT/** * MFI frame flags
Quoted 9 lines · Sumant Patro
Resubmitting with one addition (item f mentioned below)
This patch has the following enhancements :
a. handles new transition states of FW to support controller hotplug. b. It reduces by 1 the maximum cmds that the driver may send to FW. c. Sends "Stop Processing" cmd to FW before returning failure from reset routine d. Adds print inmegasas_transitionroutine
e. Sends "RESET" flag to FW to do a soft reset of controller
to move from Operational to Ready state.
Quoted 5 lines
f. Sending correct pointer (cmd->sense) to pci_pool_free This patch has been generated on latest scsi-misc git.Signed-off-by Sumant Patro <[email protected]>
Every one of these patches had extra whitespace at the end of several lines. This is a sample from the first patch:
Adds trailing whitespace.
.dotest/patch:21: if (fw_state != MFI_STATE_READY)
Adds trailing whitespace.
.dotest/patch:44: case MFI_STATE_BOOT_MESSAGE_PENDING:
Adds trailing whitespace.
.dotest/patch:85: * Reduce the max supported cmds by 1. This is
to ensure that the
Could you please try to ensure it doesn't happen in future ... it's time consuming to clean it all up again.
Thanks,
James