Commit e1485041 authored by Mikhail Karpenko's avatar Mikhail Karpenko

add libahci_debug

parent 98ffa008
...@@ -34,12 +34,12 @@ ...@@ -34,12 +34,12 @@
</option> </option>
<option id="gnu.c.compiler.option.include.paths.1702086126" name="Include paths (-I)" superClass="gnu.c.compiler.option.include.paths" valueType="includePath"> <option id="gnu.c.compiler.option.include.paths.1702086126" name="Include paths (-I)" superClass="gnu.c.compiler.option.include.paths" valueType="includePath">
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/include}&quot;"/> <listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/include}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/include/uapi}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/arch/arm/include}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/arch/arm/include/uapi}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/arch/arm/include/generated}&quot;"/> <listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/arch/arm/include/generated}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/arch/arm/include/generated/uapi}&quot;"/> <listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/arch/arm/include/generated/uapi}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/include/generated/uapi}&quot;"/> <listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/include/generated/uapi}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/arch/arm/include}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/arch/arm/include/uapi}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/include/uapi}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/arch/arm/plat-versatile/include}&quot;"/> <listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/arch/arm/plat-versatile/include}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/drivers/scsi}&quot;"/> <listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/drivers/scsi}&quot;"/>
<listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/arch/arm/boot/compressed}&quot;"/> <listOptionValue builtIn="false" value="&quot;${workspace_loc:/linux-elphel/linux/source/arch/arm/boot/compressed}&quot;"/>
...@@ -83,4 +83,9 @@ ...@@ -83,4 +83,9 @@
<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/> <autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
</scannerConfigBuildInfo> </scannerConfigBuildInfo>
</storageModule> </storageModule>
<storageModule moduleId="refreshScope" versionNumber="2">
<configuration configurationName="Default">
<resource resourceType="PROJECT" workspacePath="/linux-elphel"/>
</configuration>
</storageModule>
</cproject> </cproject>
...@@ -23,9 +23,9 @@ ...@@ -23,9 +23,9 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include "ahci.h" #include "ahci.h"
#include "libahci_debug.h"
#define DRV_NAME "elphel-ahci" #define DRV_NAME "elphel-ahci"
#define MARKER "+"
/* Property names from device tree, these are specific for the controller */ /* Property names from device tree, these are specific for the controller */
#define PROP_NAME_CLB_OFFS "clb_offs" #define PROP_NAME_CLB_OFFS "clb_offs"
...@@ -50,8 +50,10 @@ static int elphel_port_start(struct ata_port *ap) ...@@ -50,8 +50,10 @@ static int elphel_port_start(struct ata_port *ap)
struct ahci_host_priv *hpriv = ap->host->private_data; struct ahci_host_priv *hpriv = ap->host->private_data;
const struct elphel_ahci_priv *dpriv = hpriv->plat_data; const struct elphel_ahci_priv *dpriv = hpriv->plat_data;
libahci_debug_init(ap->host);
dev_info(dev, "starting port %d", ap->port_no); dev_info(dev, "starting port %d", ap->port_no);
/*pp = devm_kzalloc(dev, sizeof(struct ahci_port_priv), GFP_KERNEL); pp = devm_kzalloc(dev, sizeof(struct ahci_port_priv), GFP_KERNEL);
if (!pp) if (!pp)
return -ENOMEM; return -ENOMEM;
...@@ -60,27 +62,31 @@ static int elphel_port_start(struct ata_port *ap) ...@@ -60,27 +62,31 @@ static int elphel_port_start(struct ata_port *ap)
return -ENOMEM; return -ENOMEM;
memset(mem, 0, AHCI_CMD_TBL_AR_SZ); memset(mem, 0, AHCI_CMD_TBL_AR_SZ);
pp->cmd_tbl = mem; pp->cmd_tbl = mem;
pp->cmd_tbl_dma = mem_dma;*/ pp->cmd_tbl_dma = mem_dma;
/* /*
* Set predefined addresses * Set predefined addresses
*/ */
/*pp->cmd_slot = hpriv->mmio + dpriv->clb_offs; pp->cmd_slot = hpriv->mmio + dpriv->clb_offs;
pp->cmd_slot_dma = virt_to_phys(pp->cmd_slot); pp->cmd_slot_dma = virt_to_phys(pp->cmd_slot);
pp->rx_fis = hpriv->mmio + dpriv->fb_offs; pp->rx_fis = hpriv->mmio + dpriv->fb_offs;
pp->rx_fis_dma = virt_to_phys(pp->rx_fis);*/ pp->rx_fis_dma = virt_to_phys(pp->rx_fis);
dev_info(dev, "cmd_slot and rx_fis addresses are set");
dev_info(dev, "\tmmio address: 0x%p", hpriv->mmio);
dev_info(dev, "\tcommand slot virtual address: 0x%p", pp->cmd_slot);
dev_info(dev, "\rx fis virtual address: 0x%p", pp->rx_fis);
/* /*
* Save off initial list of interrupts to be enabled. * Save off initial list of interrupts to be enabled.
* This could be changed later * This could be changed later
*/ */
/*pp->intr_mask = DEF_PORT_IRQ; pp->intr_mask = DEF_PORT_IRQ;
ap->private_data = pp; ap->private_data = pp;
return ahci_port_resume(ap);*/ return ahci_port_resume(ap);
return 0;
} }
static int elphel_parse_prop(const struct device_node *devn, static int elphel_parse_prop(const struct device_node *devn,
...@@ -109,9 +115,9 @@ static int elphel_drv_probe(struct platform_device *pdev) ...@@ -109,9 +115,9 @@ static int elphel_drv_probe(struct platform_device *pdev)
struct elphel_ahci_priv *drv_priv; struct elphel_ahci_priv *drv_priv;
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
const struct of_device_id *match; const struct of_device_id *match;
void __iomem *mmio = NULL;
struct resource *res; struct resource *res;
unsigned int reg_val;
dev_info(&pdev->dev, "probing Elphel AHCI driver"); dev_info(&pdev->dev, "probing Elphel AHCI driver");
drv_priv = devm_kzalloc(dev, sizeof(struct elphel_ahci_priv), GFP_KERNEL); drv_priv = devm_kzalloc(dev, sizeof(struct elphel_ahci_priv), GFP_KERNEL);
...@@ -126,39 +132,31 @@ static int elphel_drv_probe(struct platform_device *pdev) ...@@ -126,39 +132,31 @@ static int elphel_drv_probe(struct platform_device *pdev)
if (ret != 0) if (ret != 0)
return ret; return ret;
/*hpriv = ahci_platform_get_resources(pdev); hpriv = ahci_platform_get_resources(pdev);
if (IS_ERR(hpriv)) if (IS_ERR(hpriv))
return PTR_ERR(hpriv); return PTR_ERR(hpriv);
hpriv->plat_data = drv_priv;
dev_info(dev, "ahci platform resources set");*/
dev_info(dev, "get IORESOURCE_MEM");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "can not get resourse");
return -EINVAL;
}
dev_info(dev, "resource name: %s", res->name);
dev_info(dev, "resource start: 0x%08x", res->start);
dev_info(dev, "resource end: 0x%08x", res->end);
/*mmio = hpriv->mmio; hpriv->plat_data = drv_priv;
if (!mmio) {
dev_err(dev, "mmio pointer is not initialized");
ahci_platform_disable_resources(hpriv);
return -EINVAL;
}
dev_info(dev, "mmio pointer: 0x%08p", mmio);
dev_info(dev, "HOST CAP register: 0x%08x", readl(mmio + HOST_CAP));
ahci_platform_disable_resources(hpriv);*/
/*ret = ahci_platform_init_host(pdev, hpriv, &ahci_elphel_port_info, reg_val = readl(hpriv->mmio + HOST_CAP);
dev_info(dev, "HOST CAP register: 0x%08x", reg_val);
reg_val = readl(hpriv->mmio + HOST_CTL);
dev_info(dev, "HOST GHC register: 0x%08x", reg_val);
reg_val = readl(hpriv->mmio + HOST_IRQ_STAT);
dev_info(dev, "HOST IS register: 0x%08x", reg_val);
reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL);
dev_info(dev, "HOST PI register: 0x%08x", reg_val);
reg_val = readl(hpriv->mmio + HOST_VERSION);
dev_info(dev, "HOST VS register: 0x%08x", reg_val);
ret = ahci_platform_init_host(pdev, hpriv, &ahci_elphel_port_info,
&ahci_platform_sht); &ahci_platform_sht);
if (ret) { if (ret) {
dev_err(dev, "can not initialize platform host");
ahci_platform_disable_resources(hpriv); ahci_platform_disable_resources(hpriv);
return ret; return ret;
} }
dev_info(dev, "ahci platform host initialized");*/ dev_info(dev, "ahci platform host initialized");
return 0; return 0;
} }
...@@ -166,12 +164,30 @@ static int elphel_drv_probe(struct platform_device *pdev) ...@@ -166,12 +164,30 @@ static int elphel_drv_probe(struct platform_device *pdev)
static int elphel_drv_remove(struct platform_device *pdev) static int elphel_drv_remove(struct platform_device *pdev)
{ {
dev_info(&pdev->dev, "removing Elphel AHCI driver"); dev_info(&pdev->dev, "removing Elphel AHCI driver");
//ata_platform_remove_one(pdev); ata_platform_remove_one(pdev);
libahci_debug_exit();
return 0;
}
static unsigned int elphel_read_id(struct ata_device *dev, struct ata_taskfile *tf, u16 *id)
{
u32 err_mask;
struct device *d = &dev->tdev;
err_mask = ata_do_dev_read_id(dev, tf, id);
if (err_mask)
return err_mask;
dev_info(d, "issue identify command");
return 0;
} }
static struct ata_port_operations ahci_elphel_ops = { static struct ata_port_operations ahci_elphel_ops = {
.inherits = &ahci_ops, .inherits = &ahci_ops,
.port_start = elphel_port_start, .port_start = elphel_port_start,
.read_id = elphel_read_id,
}; };
static const struct ata_port_info ahci_elphel_port_info = { static const struct ata_port_info ahci_elphel_port_info = {
......
/*
* libahci_debug.c
*
* Created on: Jan 20, 2016
* Author: mk
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/poll.h>
#include "libahci_debug.h"
static struct dentry *debug_root = NULL;
static struct libahci_debug_list debug_list = {.debug = 0};
static struct ahci_cmd cmd;
static struct simple_buff init_buff;
/*
* Print PxIS (0x10) analysis
*/
void libahci_debug_dump_irq(u32 status)
{
int len = 0;
int pos;
char *str = kzalloc(LIBAHCI_DEBUG_BUFSZ, GFP_KERNEL);
if (!str)
return;
len = snprintf(str, LIBAHCI_DEBUG_BUFSZ, "\tinterrupt analysis: ");
pos = len;
if (status & PORT_IRQ_D2H_REG_FIS) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "D2H Register FIS * ");
pos += len;
}
if (status & PORT_IRQ_PIOS_FIS) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, " PIO Setup FIS * ");
pos += len;
}
if (status & PORT_IRQ_DMAS_FIS) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "DMA Setup FIS * ");
pos += len;
}
if (status & PORT_IRQ_SDB_FIS) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Set Device Bits FIS * ");
pos += len;
}
if (status & PORT_IRQ_UNK_FIS) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Unknown FIS * ");
pos += len;
}
if (status & PORT_IRQ_SG_DONE) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Descriptor processed * ");
pos += len;
}
if (status & PORT_IRQ_CONNECT) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Port connect change status * ");
pos += len;
}
if (status & PORT_IRQ_DEV_ILCK) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Device interlock * ");
pos += len;
}
if (status & PORT_IRQ_PHYRDY) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "PhyRdy change status * ");
pos += len;
}
if (status & PORT_IRQ_BAD_PMP) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Incorrect port multiplier * ");
pos += len;
}
if (status & PORT_IRQ_OVERFLOW) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Overflow * ");
pos += len;
}
if (status & PORT_IRQ_IF_NONFATAL) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Iface nonfatal error * ");
pos += len;
}
if (status & PORT_IRQ_IF_ERR) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Iface fatal error * ");
pos += len;
}
if (status & PORT_IRQ_HBUS_DATA_ERR) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Host bus data error * ");
pos += len;
}
if (status & PORT_IRQ_HBUS_ERR) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Host bus fatal error * ");
pos += len;
}
if (status & PORT_IRQ_TF_ERR) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Task file error * ");
pos += len;
}
if (status & PORT_IRQ_COLD_PRES) {
len = snprintf(&str[pos], LIBAHCI_DEBUG_BUFSZ - pos, "Cold port detect * ");
pos += len;
}
libahci_debug_event(NULL, str, pos);
kfree(str);
}
EXPORT_SYMBOL_GPL(libahci_debug_dump_irq);
/*
* Read memory region pointed to by buff and dump its content
*/
void libahci_debug_dump_region(const struct ata_port *ap, const u32 *buff, size_t buff_sz, const char *prefix)
{
int i;
int len, sz;
char *str = kzalloc(LIBAHCI_DEBUG_BUFSZ, GFP_KERNEL);
if (!str)
return;
len = strlen(prefix);
if (len < LIBAHCI_DEBUG_BUFSZ) {
strncpy(str, prefix, len);
} else {
len = 0;
}
for (i = 0; i < buff_sz; i++) {
sz = snprintf(&str[len], LIBAHCI_DEBUG_BUFSZ - len, "0x%08x ", buff[i]);
len += sz;
}
libahci_debug_event(ap, str, len);
kfree(str);
}
EXPORT_SYMBOL_GPL(libahci_debug_dump_region);
/*
* Copy data from S/G list to linear buffer and dump the data
*/
void libahci_debug_dump_sg(const struct ata_queued_cmd *qc, const char *prefix)
{
struct scatterlist *sg;
int si;
int i;
int len;
int sz;
int line_brk;
u32 buff_sz = 0;
u32 buff_ptr = 0;
char *buff;
char *str;
u32 *buff_map;
// Calculate the amount of memory needed
for_each_sg(qc->sg, sg, qc->n_elem, si) {
buff_sz += sg_dma_len(sg);
}
buff = kzalloc(buff_sz, GFP_KERNEL);
if (!buff) {
return;
}
str = kzalloc(LIBAHCI_DEBUG_BUFSZ, GFP_KERNEL);
if (!str) {
kfree(buff);
return;
}
// Copy data from all DMA buffers
dma_sync_sg_for_cpu(&qc->dev->tdev, qc->sg, qc->n_elem, qc->dma_dir);
for_each_sg(qc->sg, sg, qc->n_elem, si) {
u32 sg_len = sg_dma_len(sg);
sz = sg_copy_to_buffer(sg, 1, buff + buff_ptr, sg_len);
buff_ptr += sz;
}
dma_sync_sg_for_device(&qc->dev->tdev, qc->sg, qc->n_elem, qc->dma_dir);
// Print the content of DMA buffers
buff_map = (u32 *)buff;
len = snprintf(str, LIBAHCI_DEBUG_BUFSZ, "\t%s\t%u bytes\n\t", prefix, buff_ptr);
for (i = 0, line_brk = 0; i < buff_ptr / 4; i++) {
sz = snprintf(&str[len], LIBAHCI_DEBUG_BUFSZ - len, "0x%08x ", buff_map[i]);
len += sz;
line_brk++;
if (line_brk >= 8) {
libahci_debug_event(qc->ap, str, len);
line_brk = 0;
len = snprintf(str, LIBAHCI_DEBUG_BUFSZ, "\t");
}
}
if (line_brk != 0) {
libahci_debug_event(qc->ap, str, len);
}
//printk(KERN_DEBUG "%s\tdump S/G list", MARKER);
kfree(buff);
kfree(str);
}
EXPORT_SYMBOL_GPL(libahci_debug_dump_sg);
static void libahci_debug_read_host_regs(struct ata_host *host, struct host_regs *regs)
{
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *host_mmio = hpriv->mmio;
regs->CAP = readl(host_mmio + HOST_CAP);
regs->CAP2 = readl(host_mmio + HOST_CAP2);
regs->GHC = readl(host_mmio + HOST_CTL);
regs->IS = readl(host_mmio + HOST_IRQ_STAT);
regs->PI = readl(host_mmio + HOST_PORTS_IMPL);
regs->VS = readl(host_mmio + HOST_VERSION);
regs->CCC_CTL = readl(host_mmio + 0x14);
regs->CCC_PORTS = readl(host_mmio + 0x18);
regs->EM_CTL = readl(host_mmio + HOST_EM_CTL);
regs->EM_LOC = readl(host_mmio + HOST_EM_LOC);
regs->BOHC = readl(host_mmio + 0x28);
}
static void libahci_debug_read_port_regs(struct ata_port *ap, struct port_regs *pr)
{
void __iomem *port_mmio = ahci_port_base(ap);
int i;
pr->PxCLB = readl(port_mmio + PORT_LST_ADDR);
pr->PxCLBU = readl(port_mmio + PORT_LST_ADDR_HI);
pr->PxFB = readl(port_mmio + PORT_FIS_ADDR);
pr->PxFBU = readl(port_mmio + PORT_FIS_ADDR_HI);
pr->PxIS = readl(port_mmio + PORT_IRQ_STAT);
pr->PxIE = readl(port_mmio + PORT_IRQ_MASK);
pr->PxCMD = readl(port_mmio + PORT_CMD);
//pr->reserved_1 = readl(port_mmio + PORT_RESERVED_1);
pr->PxTFD = readl(port_mmio + PORT_TFDATA);
pr->PxSIG = readl(port_mmio + PORT_SIG);
pr->PxSSTS = readl(port_mmio + PORT_SCR_STAT);
pr->PxSCTL = readl(port_mmio + PORT_SCR_CTL);
pr->PxSERR = readl(port_mmio + PORT_SCR_ERR);
pr->PxSACT = readl(port_mmio + PORT_SCR_ACT);
pr->PxCI = readl(port_mmio + PORT_CMD_ISSUE);
pr->PxSNTF = readl(port_mmio + PORT_SCR_NTF);
pr->PxFBS = readl(port_mmio + PORT_FBS);
pr->PxDEVSLP = readl(port_mmio + PORT_DEVSLP);
for (i = 0; i < PORT_VENDOR_BYTES; i++) {
pr->reserved_2[i] = readb(port_mmio + 0x70 + i);
}
}
static int libahci_debug_host_show(struct seq_file *f, void *p)
{
struct ata_host *host = f->private;
struct host_regs hr = {0};
libahci_debug_read_host_regs(host, &hr);
seq_printf(f, "CAP:\t\t0x%08X\n", hr.CAP);
seq_printf(f, "CAP2:\t\t0x%08X\n", hr.CAP2);
seq_printf(f, "GHC:\t\t0x%08X\n", hr.GHC);
seq_printf(f, "IS:\t\t0x%08X\n", hr.IS);
seq_printf(f, "PI:\t\t0x%08X\n", hr.PI);
seq_printf(f, "VS:\t\t0x%08X\n", hr.VS);
seq_printf(f, "CCC_CTL:\t0x%08X\n", hr.CCC_CTL);
seq_printf(f, "CCC_PORTS:\t0x%08X\n", hr.CCC_PORTS);
seq_printf(f, "EM_LOC:\t\t0x%08X\n", hr.EM_LOC);
seq_printf(f, "EM_CTL:\t\t0x%08X\n", hr.EM_CTL);
seq_printf(f, "BOHC:\t\t0x%08X\n", hr.BOHC);
return 0;
}
static int libahci_debug_rdesc_show(struct seq_file *f, void *p)
{
struct ata_port *ap = f->private;
struct port_regs pr = {0};
int i;
libahci_debug_read_port_regs(ap, &pr);
seq_printf(f, "PxCLB:\t\t0x%08X\n", pr.PxCLB);
seq_printf(f, "PxCLBU:\t\t0x%08X\n", pr.PxCLBU);
seq_printf(f, "PxFB:\t\tx0%08X\n", pr.PxFB);
seq_printf(f, "PxFBU:\t\t0x%08X\n", pr.PxFBU);
seq_printf(f, "PxIS:\t\t0x%08X\n", pr.PxIS);
seq_printf(f, "PxIE:\t\t0x%08X\n", pr.PxIE);
seq_printf(f, "PxCMD:\t\t0x%08X\n", pr.PxCMD);
seq_printf(f, "reserved:\t0x%08X\n", pr.reserved_1);
seq_printf(f, "PxTFD:\t\t0x%08X\n", pr.PxTFD);
seq_printf(f, "PxSIG:\t\t0x%08X\n", pr.PxSIG);
seq_printf(f, "PxSSTS:\t\t0x%08X\n", pr.PxSSTS);
seq_printf(f, "PxSCTL:\t\t0x%08X\n", pr.PxSCTL);
seq_printf(f, "PxSERR:\t\t0x%08X\n", pr.PxSERR);
seq_printf(f, "PxSACT:\t\t0x%08X\n", pr.PxSACT);
seq_printf(f, "PxCI:\t\t0x%08X\n", pr.PxCI);
seq_printf(f, "PxSNTF:\t\t0x%08X\n", pr.PxSNTF);
seq_printf(f, "PxFBS:\t\t0x%08X\n", pr.PxFBS);
seq_printf(f, "PxDEVSLP:\t0x%08X\n", pr.PxDEVSLP);
seq_printf(f, "reserved area:\t");
for (i = 0; i < PORT_RESERVED_2; i++) {
seq_printf(f, "0x%02X ", pr.reserved_2[i]);
}
seq_printf(f, "\nVendor specific bytes:\t");
for (i = 0; i < PORT_VENDOR_BYTES; i++) {
seq_printf(f, "0x%02X ", pr.PxVS[i]);
}
seq_printf(f, "\n");
return 0;
}
static int libahci_debug_host_open(struct inode *i_node, struct file *f)
{
return single_open(f, libahci_debug_host_show, i_node->i_private);
}
static int libahci_debug_rdesc_open(struct inode *i_node, struct file *f)
{
return single_open(f, libahci_debug_rdesc_show, i_node->i_private);
}
static int libahci_debug_events_open(struct inode *i_node, struct file *f)
{
int err = 0;
int sz;
unsigned long flags;
struct libahci_debug_list *list;
struct ata_port *port = i_node->i_private;
debug_list.debug = 1;
//Create event buffer for current port
list = kzalloc(sizeof(struct libahci_debug_list), GFP_KERNEL);
if (!list) {
err = -ENOMEM;
goto fail_handler;
}
if (!(list->libahci_debug_buf = kzalloc(sizeof(char) * LIBAHCI_DEBUG_BUFSZ, GFP_KERNEL))) {
err = -ENOMEM;
kfree(list);
goto fail_handler;
}
list->port_n = port->port_no;
mutex_init(&list->read_mutex);
init_waitqueue_head(&list->debug_wait);
spin_lock_irqsave(&list->debug_list_lock, flags);
list_add_tail(&list->node, &debug_list.node);
spin_unlock_irqrestore(&list->debug_list_lock, flags);
// Associate debug list entry with corresponding file
f->private_data = list;
// Copy the content of init buffer to libahci_debug_buff
/*if (init_buff.tail > init_buff.head) {
sz = init_buff.tail- init_buff.head;
memcpy(list->libahci_debug_buf, init_buff.buff, sz);
list->tail = sz;
}*/
fail_handler:
return err;
}
static ssize_t libahci_debug_events_read(struct file *f, char __user *buff, size_t sz, loff_t *pos)
{
int ret = 0, len;
struct libahci_debug_list *list = f->private_data;
DECLARE_WAITQUEUE(wait, current);
mutex_lock(&list->read_mutex);
while (ret == 0) {
if (list->head == list->tail) {
// Buffer is empty, put the queue in sleep mode
add_wait_queue(&list->debug_wait, &wait);
set_current_state(TASK_INTERRUPTIBLE);
while (list->head == list->tail) {
if (f->f_flags & O_NONBLOCK) {
ret = -EAGAIN;
break;
}
if (signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
mutex_unlock(&list->read_mutex);
schedule();
mutex_lock(&list->read_mutex);
set_current_state(TASK_INTERRUPTIBLE);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&list->debug_wait, &wait);
}
copy_rest:
//printk(KERN_DEBUG "%s Read event", MARKER);
if (list->head != list->tail && ret == 0) {
if (list->tail > list->head) {
len = list->tail - list->head;
if (copy_to_user(buff + ret, &list->libahci_debug_buf[list->head], len)) {
ret = -EFAULT;
} else {
ret += len;
list->head += len;
}
} else {
len = LIBAHCI_DEBUG_BUFSZ - list->head;
if (copy_to_user(buff, &list->libahci_debug_buf[list->head], len)) {
ret = -EFAULT;
} else {
ret += len;
list->head = 0;
goto copy_rest;
}
}
}
//printk(KERN_DEBUG "%s\thead now is %u", MARKER, list->head);
}
mutex_unlock(&list->read_mutex);
return ret;
}
static unsigned int libahci_debug_events_poll(struct file *f, struct poll_table_struct *wait)
{
struct libahci_debug_list *list = f->private_data;
poll_wait(f, &list->debug_wait, wait);
if (list->head != list->tail) {
return POLLIN | POLLRDNORM;
}
return 0;
}
static int libahci_debug_events_release(struct inode *i_node, struct file *f)
{
struct libahci_debug_list *list = f->private_data;
unsigned long flags;
debug_list.debug = 0;
spin_lock_irqsave(&list->debug_list_lock, flags);
list_del(&list->node);
spin_unlock_irqrestore(&list->debug_list_lock, flags);
kfree(list->libahci_debug_buf);
kfree(list);
return 0;
}
void libahci_debug_event(const struct ata_port *port, char *msg, size_t msg_sz)
{
int len;
int i;
char *format_msg = NULL;
unsigned long flags;
unsigned int port_index = (port == NULL) ? 0 : port->port_no;
struct libahci_debug_list *list = NULL, *pos = NULL;
//printk(KERN_DEBUG "%s Write event: %s", MARKER, msg);
if (debug_list.debug) {
format_msg = kzalloc(LIBAHCI_DEBUG_BUFSZ, GFP_KERNEL);
if (format_msg != NULL) {
// Find buffer which this event is addressed to
list_for_each_entry(list, &debug_list.node, node) {
if (list->port_n == port_index) {
pos = list;
}
}
if (pos != NULL) {
spin_lock_irqsave(&pos->debug_list_lock, flags);
len = snprintf(format_msg, LIBAHCI_DEBUG_BUFSZ, "%s %s\n", EVT_MARKER, msg);
for (i = 0; i < len; i++) {
pos->libahci_debug_buf[(pos->tail+ i) % LIBAHCI_DEBUG_BUFSZ] = format_msg[i];
}
pos->tail = (pos->tail + len) % LIBAHCI_DEBUG_BUFSZ;
spin_unlock_irqrestore(&pos->debug_list_lock, flags);
//printk(KERN_DEBUG "%s\ttail is now %u", MARKER, pos->tail);
// Wake up the queue which should be sleeping
wake_up_interruptible(&pos->debug_wait);
}
kfree(format_msg);
}
} else if (init_buff.initialized) {
// debugfs file is not open, write to tmp buffer
/*format_msg = kzalloc(LIBAHCI_DEBUG_BUFSZ, GFP_KERNEL);
if (format_msg != NULL) {
spin_lock_irqsave(&pos->debug_list_lock, flags);
len = snprintf(format_msg, LIBAHCI_DEBUG_BUFSZ, "%s %s\n", EVT_MARKER, msg);
for (i = 0; i < len; i++) {
init_buff.buff[(init_buff.tail+ i) % LIBAHCI_DEBUG_BUFSZ] = format_msg[i];
}
init_buff.tail = (init_buff.tail + len) % LIBAHCI_DEBUG_BUFSZ;
spin_unlock_irqrestore(&pos->debug_list_lock, flags);
}*/
}
}
EXPORT_SYMBOL_GPL(libahci_debug_event);
static void libahci_debug_prep_cfis(struct ahci_cmd_fis *cmd, u32 *fis, u8 pmp)
{
fis[0] = cmd->dw0;
fis[1] = cmd->dw1;
fis[2] = cmd->dw2;
fis[3] = cmd->dw3;
fis[4] = cmd->dw4;
}
void libahci_debug_exec_cmd(struct ata_port *ap)
{
void *cmd_tbl;
dma_addr_t cmd_tbl_dma;
struct ahci_port_priv *pp = ap->private_data;
struct ahci_sg *ahci_sg;
struct ahci_cmd_hdr *data;
void __iomem *port_mmio = ahci_port_base(ap);
unsigned int slot;
printk(KERN_DEBUG "%s Executing command for port %u", MARKER, ap->port_no);
slot = readl(port_mmio + PORT_CMD_ISSUE);
printk(KERN_DEBUG "%s PxCI: 0x%08x", MARKER, slot);
slot = ffz(slot);
printk(KERN_DEBUG "%s Preparing command; using slot %u", MARKER, slot);
cmd_tbl = pp->cmd_tbl + slot * AHCI_CMD_TBL_SZ;
libahci_debug_prep_cfis(&cmd.fis, cmd_tbl, ap->link.pmp);
libahci_debug_dump_region(ap, (const u32 *)cmd_tbl, 5, "\tcfis data dump: ");
/*printk(KERN_DEBUG "%s\tcfis data: DW0 = 0x%08x DW1 = 0x%08x DW2 = 0x%08x DW3 = 0x%08x DW4 = 0x%08x",
MARKER, cmd.fis.dw0, cmd.fis.dw1, cmd.fis.dw2, cmd.fis.dw3, cmd.fis.dw4);*/
printk(KERN_DEBUG "%s Preparing one S/G list", MARKER);
ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
ahci_sg->addr = cpu_to_le32(sg_dma_address(&cmd.sg) & 0xffffffff);
ahci_sg->addr_hi = cpu_to_le32((sg_dma_address(&cmd.sg) >> 16) >> 16);
ahci_sg->flags_size = cpu_to_le32(sg_dma_len(&cmd.sg));
printk(KERN_DEBUG "%s Preparing command header", MARKER);
cmd_tbl_dma = pp->cmd_tbl_dma + slot * AHCI_CMD_TBL_SZ;
pp->cmd_slot[slot].opts = cpu_to_le32(cmd.hdr.opts);
pp->cmd_slot[slot].status = 0;
pp->cmd_slot[slot].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
pp->cmd_slot[slot].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
data = &pp->cmd_slot[slot];
printk(KERN_DEBUG "%s\tchdr data: DW0 = 0x%08x DW1 = 0x%08x DW2 = 0x%08x DW3 = 0x%08x", MARKER, data->opts,
data->status, data->tbl_addr, data->tbl_addr_hi);
printk(KERN_DEBUG "%s Issuing command", MARKER);
writel(1 << slot, port_mmio + PORT_CMD_ISSUE);
cmd.cmd_sent = true;
}
EXPORT_SYMBOL_GPL(libahci_debug_exec_cmd);
void libahci_debug_irq_notify(const struct ata_port *ap)
{
int i, sz, line_brk, ptr;
size_t len;
char *buff = kzalloc(CMD_DMA_BUFSZ, GFP_KERNEL);
char *str = kzalloc(LIBAHCI_DEBUG_BUFSZ, GFP_KERNEL);
u32 *buff_map;
struct ahci_port_priv *pp = ap->private_data;
u32 *rx_fis = pp->rx_fis;
void __iomem *port_mmio = ahci_port_base((struct ata_port *)ap);
u32 tmp;
if (!buff || !str)
return;
printk(KERN_DEBUG "%s IRQ notify event, flag: %d", MARKER, cmd.cmd_sent);
if (cmd.cmd_sent) {
tmp = readl(port_mmio + PORT_SCR_ERR);
printk(KERN_DEBUG "%s PxSERR: 0x%08x", MARKER, tmp);
// Read RX FIS memory
libahci_debug_dump_region(ap, rx_fis + RX_FIS_PIO_SETUP, 5, "\tread PIO SETUP FIS region; dump: ");
libahci_debug_dump_region(ap, rx_fis + RX_FIS_D2H_REG, 5, "\tread D2H Register FIS; dump: ");
dma_sync_sg_for_cpu(ap->dev, &cmd.sg, 1, DMA_BIDIRECTIONAL);
len = sg_copy_to_buffer(&cmd.sg, 1, buff, CMD_DMA_BUFSZ);
dma_sync_sg_for_device(ap->dev, &cmd.sg, 1, DMA_BIDIRECTIONAL);
printk(KERN_DEBUG "%s %u bytes copied from DMA buffer", MARKER, len);
// Print the content of DMA buffers
buff_map = (u32 *)buff;
for (i = 0, line_brk = 0, ptr = 0; i < len / 4; i++) {
sz = snprintf(&str[ptr], LIBAHCI_DEBUG_BUFSZ - ptr, "0x%08x ", buff_map[i]);
ptr += sz;
line_brk++;
if (line_brk >= 8) {
libahci_debug_event(ap, str, ptr);
line_brk = 0;
ptr = snprintf(str, LIBAHCI_DEBUG_BUFSZ, "\t");
}
}
if (line_brk != 0) {
libahci_debug_event(ap, str, ptr);
}
// Command processed, clear flag
cmd.cmd_sent = false;
}
}
EXPORT_SYMBOL_GPL(libahci_debug_irq_notify);
static int libahci_debug_fis_open(struct inode *i_node, struct file *f)
{
struct ata_port *ap = i_node->i_private;
const char *name = f->f_path.dentry->d_name.name;
void *buff = NULL;
/*if (strncmp(name, FILE_NAME_CFIS, 5) == 0) {
buff = kzalloc(sizeof(struct ahci_cmd_fis), GFP_KERNEL);
} else if (strncmp(name, FILE_NAME_CHDR, 5) == 0) {
buff = kzalloc(sizeof(struct ahci_cmd_hdr), GFP_KERNEL);
}
if (!buff)
return -ENOMEM;*/
f->private_data = ap;
return 0;
}
static ssize_t libahci_debug_cfis_write(struct file *f, const char __user *buff, size_t buff_sz, loff_t *ppos)
{
struct ahci_cmd_fis *data = &cmd.fis;
if (buff_sz != CMD_FIS_SZ) {
return -EINVAL;
}
data->dw0 = (((buff[3] & 0xff) << 24) | ((buff[2] & 0xff) << 16) | ((buff[1] & 0xff) << 8) | (buff[0] & 0xff));
data->dw1 = (((buff[7] & 0xff) << 24) | ((buff[6] & 0xff) << 16) | ((buff[5] & 0xff) << 8) | (buff[4] & 0xff));
data->dw2 = (((buff[11] & 0xff) << 24) | ((buff[10] & 0xff) << 16) | ((buff[9] & 0xff) << 8) | (buff[8] & 0xff));
data->dw3 = (((buff[15] & 0xff) << 24) | ((buff[14] & 0xff) << 16) | ((buff[13] & 0xff) << 8) | (buff[12] & 0xff));
data->dw4 = (((buff[19] & 0xff) << 24) | ((buff[18] & 0xff) << 16) | ((buff[17] & 0xff) << 8) | (buff[16] & 0xff));
//printk(KERN_DEBUG "%s cfis data: DW0 = 0x%08x DW1 = 0x%08x DW2 = 0x%08x DW3 = 0x%08x DW4 = 0x%08x, pos = %lld",
// MARKER, data->dw0, data->dw1, data->dw2, data->dw3, data->dw4, *ppos);
return buff_sz;
}
static ssize_t libahci_debug_chdr_write(struct file *f, const char __user *buff, size_t buff_sz, loff_t *ppos)
{
struct ahci_cmd_hdr *data = &cmd.hdr;
if (buff_sz != CMD_HDR_SZ) {
return -EINVAL;
}
data->opts = (((buff[3] & 0xff) << 24) | ((buff[2] & 0xff) << 16) | ((buff[1] & 0xff) << 8) | (buff[0] & 0xff));
data->status = (((buff[7] & 0xff) << 24) | ((buff[6] & 0xff) << 16) | ((buff[5] & 0xff) << 8) | (buff[4] & 0xff));
data->tbl_addr = (((buff[11] & 0xff) << 24) | ((buff[10] & 0xff) << 16) | ((buff[9] & 0xff) << 8) | (buff[8] & 0xff));
data->tbl_addr_hi = (((buff[15] & 0xff) << 24) | ((buff[14] & 0xff) << 16) | ((buff[13] & 0xff) << 8) | (buff[12] & 0xff));
//printk(KERN_DEBUG "%s chdr data: DW0 = 0x%08x DW1 = 0x%08x DW2 = 0x%08x DW3 = 0x%08x, pos = %lld", MARKER, data->opts,
// data->status, data->tbl_addr, data->tbl_addr_hi, *ppos);
libahci_debug_exec_cmd(f->private_data);
return buff_sz;
}
static int libahci_debug_fis_release(struct inode *i_node, struct file *f)
{
return 0;
}
static const struct file_operations libahci_debug_host_ops = {
.open = libahci_debug_host_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations libahci_debug_rdesc_ops = {
.open = libahci_debug_rdesc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations libahci_debug_events_fops = {
.owner = THIS_MODULE,
.open = libahci_debug_events_open,
.read = libahci_debug_events_read,
.poll = libahci_debug_events_poll,
.release = libahci_debug_events_release,
.llseek = noop_llseek,
};
static const struct file_operations libahci_debug_cfis_ops = {
.open = libahci_debug_fis_open,
.write = libahci_debug_cfis_write,
.release = libahci_debug_fis_release,
};
static const struct file_operations libahci_debug_chdr_ops = {
.open = libahci_debug_fis_open,
.write = libahci_debug_chdr_write,
.release = libahci_debug_fis_release,
};
static int libahci_debug_init_sg(void)
{
cmd.sg_buff = kzalloc(CMD_DMA_BUFSZ, GFP_KERNEL);
// mark the area
memset(cmd.sg_buff, 0xa5, CMD_DMA_BUFSZ);
if (!cmd.sg_buff) {
return -ENOMEM;
} else {
sg_init_one(&cmd.sg, cmd.sg_buff, CMD_DMA_BUFSZ);
}
return 0;
}
int libahci_debug_init(struct ata_host *host)
{
int i;
char port_n[] = "port00";
struct dentry *node;
INIT_LIST_HEAD(&debug_list.node);
printk(KERN_DEBUG "%s Loading debug AHCI driver", MARKER);
debug_root = debugfs_create_dir(ROOT_DIR_NAME, NULL);
if (!debug_root) {
goto fail_handler;
}
debugfs_create_file("rdesc_host", 0644,
debug_root, host, &libahci_debug_host_ops);
/* Create subdir for each port and add there several files:
* one for port registers, one for port events log and
* two files for working with FISes
*/
for (i = 0; i < host->n_ports; i++) {
snprintf(port_n, 7, "port%02d", i);
node = debugfs_create_dir(port_n, debug_root);
debugfs_create_file("rdesc_port", 0644,
node, host->ports[i], &libahci_debug_rdesc_ops);
debugfs_create_file("events", 0644,
node, host->ports[i], &libahci_debug_events_fops);
debugfs_create_file(FILE_NAME_CFIS, 0222,
node, host->ports[i], &libahci_debug_cfis_ops);
debugfs_create_file(FILE_NAME_CHDR, 0222,
node, host->ports[i], &libahci_debug_chdr_ops);
}
if (libahci_debug_init_sg() != 0) {
goto fail_handler;
}
/*init_buff.buff = kzalloc(LIBAHCI_DEBUG_BUFSZ, GFP_KERNEL);
if (init_buff.buff == NULL) {
kfree(cmd.sg_buff);
goto fail_handler;
}
init_buff.initialized = true;*/
return 0;
fail_handler:
debugfs_remove_recursive(debug_root);
printk(KERN_DEBUG "%s Unable to create debugfs file structure", MARKER);
return -ENOENT;
}
EXPORT_SYMBOL_GPL(libahci_debug_init);
void libahci_debug_exit(void)
{
kfree(cmd.sg_buff);
debugfs_remove_recursive(debug_root);
}
EXPORT_SYMBOL_GPL(libahci_debug_exit);
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("Debug AHCI SATA low-level routines");
MODULE_LICENSE("GPL");
/*
* libahci_debug.h
*
* Created on: Jan 20, 2016
* Author: mk
*/
#include "ahci.h"
#ifndef _LIBAHCI_DEBUG_H_
#define _LIBAHCI_DEBUG_H_
#define ROOT_DIR_NAME "ahci_exp"
#define FILE_NAME_CFIS "cfis"
#define FILE_NAME_CHDR "chdr"
#define MARKER "++"
#define EVT_MARKER ">"
#define CMD_FIS_SZ 20
#define CMD_HDR_SZ 16
#define CMD_DMA_BUFSZ 512
#define PORT_RESERVED_2 40
#define PORT_VENDOR_BYTES 16
#define LIBAHCI_DEBUG_BUFSZ 16384
struct libahci_debug_list {
unsigned int debug;
unsigned int port_n;
char *libahci_debug_buf;
int head;
int tail;
struct list_head node;
struct mutex read_mutex;
wait_queue_head_t debug_wait;
spinlock_t debug_list_lock;
};
struct simple_buff {
char *buff;
int head;
int tail;
bool initialized;
};
struct ahci_cmd_fis {
__le32 dw0;
__le32 dw1;
__le32 dw2;
__le32 dw3;
__le32 dw4;
};
struct ahci_cmd {
struct ahci_cmd_hdr hdr;
struct ahci_cmd_fis fis;
struct scatterlist sg;
char *sg_buff;
int cmd_sent;
};
// AHCI Port registers
struct port_regs {
// Port command list base address
u32 PxCLB;
// Port command list based address upper 32-bits
u32 PxCLBU;
// Port FIS base address
u32 PxFB;
// Port FIS base address upper 32-bits
u32 PxFBU;
u32 PxIS;
u32 PxIE;
u32 PxCMD;
u32 reserved_1;
u32 PxTFD;
u32 PxSIG;
u32 PxSSTS;
u32 PxSCTL;
u32 PxSERR;
u32 PxSACT;
u32 PxCI;
u32 PxSNTF;
u32 PxFBS;
u32 PxDEVSLP;
char reserved_2[PORT_RESERVED_2];
char PxVS[PORT_VENDOR_BYTES];
};
struct host_regs {
u32 CAP;
u32 GHC;
u32 IS;
u32 PI;
u32 VS;
u32 CCC_CTL;
u32 CCC_PORTS;
u32 EM_LOC;
u32 EM_CTL;
u32 CAP2;
u32 BOHC;
};
int libahci_debug_init(struct ata_host *host);
void libahci_debug_exit(void);
void libahci_debug_event(const struct ata_port *port ,char *msg, size_t msg_sz);
void libahci_debug_dump_region(const struct ata_port *ap, const u32 *buf, size_t buff_sz, const char* prefix);
void libahci_debug_dump_irq(u32 status);
void libahci_debug_dump_sg(const struct ata_queued_cmd *qc, const char *prefix);
void libahci_debug_irq_notify(const struct ata_port *ap);
void libahci_debug_exec_cmd(struct ata_port *ap);
#endif /* _LIBAHCI_DEBUG_H_ */
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