Commit 8db53331 authored by Mikhail Karpenko's avatar Mikhail Karpenko
Browse files

Add a bit more debug output to AHCI driver

parent 04b8faaf

src/drivers/ata/ahci_elphel.c

+45 −10
Original line number Diff line number Diff line
@@ -47,6 +47,9 @@ 
#define PROP_NAME_CLB_OFFS "clb_offs"

#define PROP_NAME_FB_OFFS "fb_offs"



#define DATASCOPE_OFFSET    0x1000

#define DATASCOPE_SIZE      0x200



static struct ata_port_operations ahci_elphel_ops;

static const struct ata_port_info ahci_elphel_port_info;

static struct scsi_host_template ahci_platform_sht;
@@ -79,8 +82,9 @@ static inline void reset_chunks(struct fvec *vects, int all); 
static int check_chunks(struct fvec *vects);

static void dump_sg_list(const struct device *dev, const struct fvec *sgl, size_t elems);

static void dump_sg_list_uncond(const struct fvec *sgl, size_t elems);

static void dump_iomem(void __iomem *mmio);

static void dump_iomem(void __iomem *mmio, size_t sz, dma_addr_t dma_addr);

static void dump_dpriv_fields(struct elphel_ahci_priv *dpriv);

static void dump_current_state(struct elphel_ahci_priv *dpriv);



static ssize_t set_load_flag(struct device *dev, struct device_attribute *attr,

		const char *buff, size_t buff_sz)
@@ -219,7 +223,6 @@ static irqreturn_t elphel_irq_handler(int irq, void * dev_instance) 
	struct elphel_ahci_priv *dpriv = hpriv->plat_data;

	uint32_t irq_stat, host_irq_stat;





	if (dpriv->flags & IRQ_SIMPLE) {

		/* handle interrupt from internal command */

		host_irq_stat = readl(hpriv->mmio + HOST_IRQ_STAT);
@@ -1186,15 +1189,14 @@ void error_handler(struct elphel_ahci_priv *dpriv) 
	struct ahci_host_priv *hpriv = host->private_data;

	struct ata_port *ap = host->ports[DEFAULT_PORT_NUM];

	struct ata_link *link = &ap->link;

	struct ahci_port_priv *pp = ap->private_data;



	int pmp = link->pmp;

	int rc;

	unsigned int class;

	unsigned long deadline = jiffies + msecs_to_jiffies(DEFAULT_CMD_TIMEOUT);



	dump_iomem(hpriv->mmio);

	dump_dpriv_fields(dpriv);

	dump_sg_list_uncond(dpriv->sgl, dpriv->sg_elems);

	dump_current_state(dpriv);

	printk(KERN_DEBUG "reset command queue and all flags\n");

	reset_all_commands(dpriv);
@@ -1713,15 +1715,16 @@ static void dump_sg_list_uncond(const struct fvec *sgl, size_t elems) 
	printk(KERN_DEBUG "===== end of S/G list =====\n");

}



/** Debug function, make dump of controller's memory*/

static void dump_iomem(void __iomem *mmio)

/** Debug function, make dump of controller's memory, sz is in DW */

static void dump_iomem(void __iomem *mmio, size_t sz, dma_addr_t dma_addr)

{

	int i, col = 0, pos = 0;

	u32 val;

	char str[512] = {0};



	printk(KERN_DEBUG "dump AHCI iomem:\n");

	for (i = 0; i < 100; i++) {

	if (dma_addr)

		printk(KERN_DEBUG "DMA address: 0x%08x\n", dma_addr);

	for (i = 0; i < sz; i++) {

		val = ioread32(mmio + 4 * i);

		pos += snprintf(&str[pos], 16, "0x%08x ", val);

		col++;
@@ -1731,7 +1734,8 @@ static void dump_iomem(void __iomem *mmio) 
			printk(KERN_DEBUG "%s\n", str);

		}

	}

	printk(KERN_DEBUG "\n");

	if (pos != 0)

		printk(KERN_DEBUG "%s\n", str);

}



static void dump_dpriv_fields(struct elphel_ahci_priv *dpriv)
@@ -1745,6 +1749,37 @@ static void dump_dpriv_fields(struct elphel_ahci_priv *dpriv) 
			dpriv->lba_ptr.wr_count, dpriv->curr_cmd, dpriv->max_data_sz, dpriv->curr_data_chunk, dpriv->curr_data_offset);

}



static void dump_current_state(struct elphel_ahci_priv *dpriv)

{

	struct ata_host *host = dev_get_drvdata(dpriv->dev);

	struct ahci_host_priv *hpriv = host->private_data;

	struct ata_port *ap = host->ports[DEFAULT_PORT_NUM];

	struct ata_link *link = &ap->link;

	struct ahci_port_priv *pp = ap->private_data;

	uint32_t *datascope_ptr;



	printk(KERN_DEBUG "===== HBA memory dump ======\n");

	dump_iomem(hpriv->mmio, 100, dpriv->base_addr);

	printk(KERN_DEBUG "===== command list structure dump =====\n");

	dump_iomem(pp->cmd_slot, 8, pp->cmd_slot_dma);

	printk(KERN_DEBUG "===== command FIS dump =====\n");

	dump_iomem(pp->cmd_tbl, 16, pp->cmd_tbl_dma);

	printk(KERN_DEBUG "===== received FIS memory (last FIS received) dump =====\n");

	dump_iomem(pp->rx_fis, 64, pp->rx_fis_dma);



//	datascope_ptr = ioremap_nocache(dpriv->base_addr + DATASCOPE_OFFSET, DATASCOPE_SIZE);

//	if (datascope_ptr) {

//		printk(KERN_DEBUG "===== datascope (debug) data dump =====\n");

//		dump_iomem(datascope_ptr, 512, dpriv->base_addr + DATASCOPE_OFFSET);

//		iounmap(datascope_ptr);

//	} else {

//		printk(KERN_DEBUG "unable to ioremap datascope region\n");

//	}



	dump_dpriv_fields(dpriv);

	dump_sg_list_uncond(dpriv->sgl, dpriv->sg_elems);

}



MODULE_LICENSE("GPL");

MODULE_AUTHOR("Elphel, Inc.");

MODULE_DESCRIPTION("Elphel AHCI SATA platform driver for elphel393 camera");