forked from Minki/linux
libata/ahci: enclosure management support
Add Enclosure Management support to libata and ahci. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Kristen Carlson Accardi
Jeff Garzik
parent
87fbc5a060
commit
18f7ba4c2f
@ -56,6 +56,12 @@ MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)
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static int ahci_enable_alpm(struct ata_port *ap,
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enum link_pm policy);
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static void ahci_disable_alpm(struct ata_port *ap);
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static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
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static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
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size_t size);
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static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
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ssize_t size);
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#define MAX_SLOTS 8
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enum {
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AHCI_PCI_BAR = 5,
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@ -98,6 +104,8 @@ enum {
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HOST_IRQ_STAT = 0x08, /* interrupt status */
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HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
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HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
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HOST_EM_LOC = 0x1c, /* Enclosure Management location */
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HOST_EM_CTL = 0x20, /* Enclosure Management Control */
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/* HOST_CTL bits */
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HOST_RESET = (1 << 0), /* reset controller; self-clear */
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@ -105,6 +113,7 @@ enum {
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HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
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/* HOST_CAP bits */
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HOST_CAP_EMS = (1 << 6), /* Enclosure Management support */
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HOST_CAP_SSC = (1 << 14), /* Slumber capable */
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HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
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HOST_CAP_CLO = (1 << 24), /* Command List Override support */
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@ -202,6 +211,11 @@ enum {
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ATA_FLAG_IPM,
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ICH_MAP = 0x90, /* ICH MAP register */
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/* em_ctl bits */
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EM_CTL_RST = (1 << 9), /* Reset */
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EM_CTL_TM = (1 << 8), /* Transmit Message */
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EM_CTL_ALHD = (1 << 26), /* Activity LED */
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};
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struct ahci_cmd_hdr {
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@ -219,12 +233,21 @@ struct ahci_sg {
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__le32 flags_size;
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};
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struct ahci_em_priv {
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enum sw_activity blink_policy;
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struct timer_list timer;
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unsigned long saved_activity;
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unsigned long activity;
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unsigned long led_state;
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};
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struct ahci_host_priv {
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unsigned int flags; /* AHCI_HFLAG_* */
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u32 cap; /* cap to use */
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u32 port_map; /* port map to use */
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u32 saved_cap; /* saved initial cap */
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u32 saved_port_map; /* saved initial port_map */
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u32 em_loc; /* enclosure management location */
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};
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struct ahci_port_priv {
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@ -240,6 +263,8 @@ struct ahci_port_priv {
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unsigned int ncq_saw_dmas:1;
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unsigned int ncq_saw_sdb:1;
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u32 intr_mask; /* interrupts to enable */
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struct ahci_em_priv em_priv[MAX_SLOTS];/* enclosure management info
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* per PM slot */
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};
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static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
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@ -277,9 +302,20 @@ static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
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static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
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static int ahci_pci_device_resume(struct pci_dev *pdev);
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#endif
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static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
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static ssize_t ahci_activity_store(struct ata_device *dev,
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enum sw_activity val);
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static void ahci_init_sw_activity(struct ata_link *link);
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static struct device_attribute *ahci_shost_attrs[] = {
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&dev_attr_link_power_management_policy,
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&dev_attr_em_message_type,
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&dev_attr_em_message,
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NULL
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};
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static struct device_attribute *ahci_sdev_attrs[] = {
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&dev_attr_sw_activity,
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NULL
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};
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@ -289,6 +325,7 @@ static struct scsi_host_template ahci_sht = {
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.sg_tablesize = AHCI_MAX_SG,
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.dma_boundary = AHCI_DMA_BOUNDARY,
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.shost_attrs = ahci_shost_attrs,
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.sdev_attrs = ahci_sdev_attrs,
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};
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static struct ata_port_operations ahci_ops = {
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@ -316,6 +353,10 @@ static struct ata_port_operations ahci_ops = {
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.enable_pm = ahci_enable_alpm,
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.disable_pm = ahci_disable_alpm,
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.em_show = ahci_led_show,
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.em_store = ahci_led_store,
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.sw_activity_show = ahci_activity_show,
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.sw_activity_store = ahci_activity_store,
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#ifdef CONFIG_PM
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.port_suspend = ahci_port_suspend,
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.port_resume = ahci_port_resume,
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@ -561,6 +602,11 @@ static struct pci_driver ahci_pci_driver = {
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#endif
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};
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static int ahci_em_messages = 1;
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module_param(ahci_em_messages, int, 0444);
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/* add other LED protocol types when they become supported */
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MODULE_PARM_DESC(ahci_em_messages,
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"Set AHCI Enclosure Management Message type (0 = disabled, 1 = LED");
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static inline int ahci_nr_ports(u32 cap)
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{
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@ -1031,11 +1077,28 @@ static void ahci_power_down(struct ata_port *ap)
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static void ahci_start_port(struct ata_port *ap)
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{
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struct ahci_port_priv *pp = ap->private_data;
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struct ata_link *link;
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struct ahci_em_priv *emp;
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/* enable FIS reception */
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ahci_start_fis_rx(ap);
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/* enable DMA */
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ahci_start_engine(ap);
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/* turn on LEDs */
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if (ap->flags & ATA_FLAG_EM) {
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ata_port_for_each_link(link, ap) {
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emp = &pp->em_priv[link->pmp];
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ahci_transmit_led_message(ap, emp->led_state, 4);
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}
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}
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if (ap->flags & ATA_FLAG_SW_ACTIVITY)
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ata_port_for_each_link(link, ap)
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ahci_init_sw_activity(link);
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}
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static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
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@ -1116,6 +1179,230 @@ static int ahci_reset_controller(struct ata_host *host)
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return 0;
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}
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static void ahci_sw_activity(struct ata_link *link)
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{
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struct ata_port *ap = link->ap;
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struct ahci_port_priv *pp = ap->private_data;
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struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
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if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
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return;
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emp->activity++;
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if (!timer_pending(&emp->timer))
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mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
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}
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static void ahci_sw_activity_blink(unsigned long arg)
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{
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struct ata_link *link = (struct ata_link *)arg;
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struct ata_port *ap = link->ap;
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struct ahci_port_priv *pp = ap->private_data;
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struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
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unsigned long led_message = emp->led_state;
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u32 activity_led_state;
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led_message &= 0xffff0000;
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led_message |= ap->port_no | (link->pmp << 8);
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/* check to see if we've had activity. If so,
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* toggle state of LED and reset timer. If not,
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* turn LED to desired idle state.
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*/
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if (emp->saved_activity != emp->activity) {
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emp->saved_activity = emp->activity;
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/* get the current LED state */
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activity_led_state = led_message & 0x00010000;
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if (activity_led_state)
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activity_led_state = 0;
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else
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activity_led_state = 1;
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/* clear old state */
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led_message &= 0xfff8ffff;
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/* toggle state */
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led_message |= (activity_led_state << 16);
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mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
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} else {
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/* switch to idle */
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led_message &= 0xfff8ffff;
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if (emp->blink_policy == BLINK_OFF)
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led_message |= (1 << 16);
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}
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ahci_transmit_led_message(ap, led_message, 4);
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}
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static void ahci_init_sw_activity(struct ata_link *link)
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{
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struct ata_port *ap = link->ap;
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struct ahci_port_priv *pp = ap->private_data;
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struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
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/* init activity stats, setup timer */
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emp->saved_activity = emp->activity = 0;
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setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link);
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/* check our blink policy and set flag for link if it's enabled */
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if (emp->blink_policy)
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link->flags |= ATA_LFLAG_SW_ACTIVITY;
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}
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static int ahci_reset_em(struct ata_host *host)
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{
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void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
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u32 em_ctl;
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em_ctl = readl(mmio + HOST_EM_CTL);
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if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
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return -EINVAL;
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writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
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return 0;
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}
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static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
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ssize_t size)
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{
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struct ahci_host_priv *hpriv = ap->host->private_data;
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struct ahci_port_priv *pp = ap->private_data;
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void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
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u32 em_ctl;
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u32 message[] = {0, 0};
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unsigned int flags;
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int pmp;
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struct ahci_em_priv *emp;
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/* get the slot number from the message */
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pmp = (state & 0x0000ff00) >> 8;
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if (pmp < MAX_SLOTS)
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emp = &pp->em_priv[pmp];
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else
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return -EINVAL;
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spin_lock_irqsave(ap->lock, flags);
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/*
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* if we are still busy transmitting a previous message,
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* do not allow
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*/
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em_ctl = readl(mmio + HOST_EM_CTL);
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if (em_ctl & EM_CTL_TM) {
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spin_unlock_irqrestore(ap->lock, flags);
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return -EINVAL;
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}
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/*
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* create message header - this is all zero except for
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* the message size, which is 4 bytes.
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*/
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message[0] |= (4 << 8);
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/* ignore 0:4 of byte zero, fill in port info yourself */
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message[1] = ((state & 0xfffffff0) | ap->port_no);
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/* write message to EM_LOC */
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writel(message[0], mmio + hpriv->em_loc);
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writel(message[1], mmio + hpriv->em_loc+4);
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/* save off new led state for port/slot */
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emp->led_state = message[1];
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/*
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* tell hardware to transmit the message
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*/
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writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
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spin_unlock_irqrestore(ap->lock, flags);
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return size;
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}
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static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
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{
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struct ahci_port_priv *pp = ap->private_data;
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struct ata_link *link;
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struct ahci_em_priv *emp;
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int rc = 0;
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ata_port_for_each_link(link, ap) {
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emp = &pp->em_priv[link->pmp];
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rc += sprintf(buf, "%lx\n", emp->led_state);
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}
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return rc;
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}
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static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
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size_t size)
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{
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int state;
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int pmp;
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struct ahci_port_priv *pp = ap->private_data;
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struct ahci_em_priv *emp;
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state = simple_strtoul(buf, NULL, 0);
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/* get the slot number from the message */
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pmp = (state & 0x0000ff00) >> 8;
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if (pmp < MAX_SLOTS)
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emp = &pp->em_priv[pmp];
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else
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return -EINVAL;
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/* mask off the activity bits if we are in sw_activity
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* mode, user should turn off sw_activity before setting
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* activity led through em_message
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*/
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if (emp->blink_policy)
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state &= 0xfff8ffff;
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return ahci_transmit_led_message(ap, state, size);
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}
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static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
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{
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struct ata_link *link = dev->link;
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struct ata_port *ap = link->ap;
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struct ahci_port_priv *pp = ap->private_data;
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struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
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u32 port_led_state = emp->led_state;
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/* save the desired Activity LED behavior */
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if (val == OFF) {
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/* clear LFLAG */
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link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
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/* set the LED to OFF */
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port_led_state &= 0xfff80000;
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port_led_state |= (ap->port_no | (link->pmp << 8));
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ahci_transmit_led_message(ap, port_led_state, 4);
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} else {
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link->flags |= ATA_LFLAG_SW_ACTIVITY;
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if (val == BLINK_OFF) {
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/* set LED to ON for idle */
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port_led_state &= 0xfff80000;
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port_led_state |= (ap->port_no | (link->pmp << 8));
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port_led_state |= 0x00010000; /* check this */
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ahci_transmit_led_message(ap, port_led_state, 4);
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}
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}
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emp->blink_policy = val;
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return 0;
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}
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static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
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{
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struct ata_link *link = dev->link;
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struct ata_port *ap = link->ap;
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struct ahci_port_priv *pp = ap->private_data;
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struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
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/* display the saved value of activity behavior for this
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* disk.
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*/
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return sprintf(buf, "%d\n", emp->blink_policy);
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}
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static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
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int port_no, void __iomem *mmio,
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void __iomem *port_mmio)
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@ -1848,6 +2135,8 @@ static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
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writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
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readl(port_mmio + PORT_CMD_ISSUE); /* flush */
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ahci_sw_activity(qc->dev->link);
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return 0;
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}
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@ -2154,7 +2443,8 @@ static void ahci_print_info(struct ata_host *host)
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dev_printk(KERN_INFO, &pdev->dev,
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"flags: "
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"%s%s%s%s%s%s%s"
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"%s%s%s%s%s%s%s\n"
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"%s%s%s%s%s%s%s"
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"%s\n"
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,
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cap & (1 << 31) ? "64bit " : "",
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@ -2171,7 +2461,8 @@ static void ahci_print_info(struct ata_host *host)
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cap & (1 << 17) ? "pmp " : "",
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cap & (1 << 15) ? "pio " : "",
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cap & (1 << 14) ? "slum " : "",
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cap & (1 << 13) ? "part " : ""
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cap & (1 << 13) ? "part " : "",
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cap & (1 << 6) ? "ems ": ""
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);
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}
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@ -2291,6 +2582,24 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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if (hpriv->cap & HOST_CAP_PMP)
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pi.flags |= ATA_FLAG_PMP;
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if (ahci_em_messages && (hpriv->cap & HOST_CAP_EMS)) {
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u8 messages;
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void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
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u32 em_loc = readl(mmio + HOST_EM_LOC);
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u32 em_ctl = readl(mmio + HOST_EM_CTL);
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messages = (em_ctl & 0x000f0000) >> 16;
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/* we only support LED message type right now */
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if ((messages & 0x01) && (ahci_em_messages == 1)) {
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/* store em_loc */
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hpriv->em_loc = ((em_loc >> 16) * 4);
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pi.flags |= ATA_FLAG_EM;
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if (!(em_ctl & EM_CTL_ALHD))
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pi.flags |= ATA_FLAG_SW_ACTIVITY;
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}
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}
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/* CAP.NP sometimes indicate the index of the last enabled
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* port, at other times, that of the last possible port, so
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* determining the maximum port number requires looking at
|
||||
@ -2304,6 +2613,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
|
||||
host->iomap = pcim_iomap_table(pdev);
|
||||
host->private_data = hpriv;
|
||||
|
||||
if (pi.flags & ATA_FLAG_EM)
|
||||
ahci_reset_em(host);
|
||||
|
||||
for (i = 0; i < host->n_ports; i++) {
|
||||
struct ata_port *ap = host->ports[i];
|
||||
|
||||
@ -2314,6 +2626,11 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
|
||||
/* set initial link pm policy */
|
||||
ap->pm_policy = NOT_AVAILABLE;
|
||||
|
||||
/* set enclosure management message type */
|
||||
if (ap->flags & ATA_FLAG_EM)
|
||||
ap->em_message_type = ahci_em_messages;
|
||||
|
||||
|
||||
/* disabled/not-implemented port */
|
||||
if (!(hpriv->port_map & (1 << i)))
|
||||
ap->ops = &ata_dummy_port_ops;
|
||||
|
||||
@ -190,6 +190,85 @@ static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
|
||||
scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct Scsi_Host *shost = class_to_shost(dev);
|
||||
struct ata_port *ap = ata_shost_to_port(shost);
|
||||
if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
|
||||
return ap->ops->em_store(ap, buf, count);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct Scsi_Host *shost = class_to_shost(dev);
|
||||
struct ata_port *ap = ata_shost_to_port(shost);
|
||||
|
||||
if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
|
||||
return ap->ops->em_show(ap, buf);
|
||||
return -EINVAL;
|
||||
}
|
||||
DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
|
||||
ata_scsi_em_message_show, ata_scsi_em_message_store);
|
||||
EXPORT_SYMBOL_GPL(dev_attr_em_message);
|
||||
|
||||
static ssize_t
|
||||
ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct Scsi_Host *shost = class_to_shost(dev);
|
||||
struct ata_port *ap = ata_shost_to_port(shost);
|
||||
|
||||
return snprintf(buf, 23, "%d\n", ap->em_message_type);
|
||||
}
|
||||
DEVICE_ATTR(em_message_type, S_IRUGO,
|
||||
ata_scsi_em_message_type_show, NULL);
|
||||
EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
|
||||
|
||||
static ssize_t
|
||||
ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct scsi_device *sdev = to_scsi_device(dev);
|
||||
struct ata_port *ap = ata_shost_to_port(sdev->host);
|
||||
struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
|
||||
|
||||
if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
|
||||
return ap->ops->sw_activity_show(atadev, buf);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct scsi_device *sdev = to_scsi_device(dev);
|
||||
struct ata_port *ap = ata_shost_to_port(sdev->host);
|
||||
struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
|
||||
enum sw_activity val;
|
||||
int rc;
|
||||
|
||||
if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
|
||||
val = simple_strtoul(buf, NULL, 0);
|
||||
switch (val) {
|
||||
case OFF: case BLINK_ON: case BLINK_OFF:
|
||||
rc = ap->ops->sw_activity_store(atadev, val);
|
||||
if (!rc)
|
||||
return count;
|
||||
else
|
||||
return rc;
|
||||
}
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
|
||||
ata_scsi_activity_store);
|
||||
EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
|
||||
|
||||
static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
|
||||
void (*done)(struct scsi_cmnd *))
|
||||
{
|
||||
|
||||
@ -169,6 +169,7 @@ enum {
|
||||
ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
|
||||
ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
|
||||
ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
|
||||
ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
|
||||
|
||||
/* struct ata_port flags */
|
||||
ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
|
||||
@ -191,6 +192,10 @@ enum {
|
||||
ATA_FLAG_AN = (1 << 18), /* controller supports AN */
|
||||
ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
|
||||
ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
|
||||
ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
|
||||
* management */
|
||||
ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
|
||||
* led */
|
||||
|
||||
/* The following flag belongs to ap->pflags but is kept in
|
||||
* ap->flags because it's referenced in many LLDs and will be
|
||||
@ -446,6 +451,15 @@ enum link_pm {
|
||||
MEDIUM_POWER,
|
||||
};
|
||||
extern struct device_attribute dev_attr_link_power_management_policy;
|
||||
extern struct device_attribute dev_attr_em_message_type;
|
||||
extern struct device_attribute dev_attr_em_message;
|
||||
extern struct device_attribute dev_attr_sw_activity;
|
||||
|
||||
enum sw_activity {
|
||||
OFF,
|
||||
BLINK_ON,
|
||||
BLINK_OFF,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_ATA_SFF
|
||||
struct ata_ioports {
|
||||
@ -701,6 +715,7 @@ struct ata_port {
|
||||
struct timer_list fastdrain_timer;
|
||||
unsigned long fastdrain_cnt;
|
||||
|
||||
int em_message_type;
|
||||
void *private_data;
|
||||
|
||||
#ifdef CONFIG_ATA_ACPI
|
||||
@ -792,6 +807,12 @@ struct ata_port_operations {
|
||||
u8 (*bmdma_status)(struct ata_port *ap);
|
||||
#endif /* CONFIG_ATA_SFF */
|
||||
|
||||
ssize_t (*em_show)(struct ata_port *ap, char *buf);
|
||||
ssize_t (*em_store)(struct ata_port *ap, const char *message,
|
||||
size_t size);
|
||||
ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
|
||||
ssize_t (*sw_activity_store)(struct ata_device *dev,
|
||||
enum sw_activity val);
|
||||
/*
|
||||
* Obsolete
|
||||
*/
|
||||
|
||||
Loading…
Reference in New Issue
Block a user