Merge bk://linux-dj.bkbits.net/agpgart

into home.transmeta.com:/home/torvalds/v2.5/linux

drivers/char/agp/Makefile

-agpgart-y := backend.o frontend.o generic.o generic-3.0.o
+agpgart-y := backend.o frontend.o generic.o isoch.o
 
 obj-$(CONFIG_AGP)		+= agpgart.o
 obj-$(CONFIG_AGP_ALI)		+= ali-agp.o

drivers/char/agp/agp.h

@@ -139,6 +139,8 @@ struct agp_bridge_data {
 	int max_memory_agp;	/* in number of pages */
 	int aperture_size_idx;
 	int capndx;
+	char major_version;
+	char minor_version;
 };
 
 #define OUTREG64(mmap, addr, val)	__raw_writeq((val), (mmap)+(addr))
@@ -388,27 +390,38 @@ void agp_free_key(int key);
 int agp_num_entries(void);
 u32 agp_collect_device_status(u32 mode, u32 command);
 void agp_device_command(u32 command, int agp_v3);
-int agp_3_0_node_enable(struct agp_bridge_data *bridge, u32 mode, u32 minor);
+int agp_3_0_enable(struct agp_bridge_data *bridge, u32 mode);
+int agp_3_5_enable(struct agp_bridge_data *bridge, u32 mode);
 void global_cache_flush(void);
+void get_agp_version(struct agp_bridge_data *bridge);
 
 /* Standard agp registers */
 #define AGPSTAT			0x4
 #define AGPCMD			0x8
+#define AGPNISTAT		0xc
 #define AGPNEPG			0x16
+#define AGPNICMD		0x20
 
 #define AGP_MAJOR_VERSION_SHIFT	(20)
 #define AGP_MINOR_VERSION_SHIFT	(16)
 
 #define AGPSTAT_RQ_DEPTH	(0xff000000)
 
+#define AGPSTAT_CAL_MASK	(1<<12|1<<11|1<<10)
+#define AGPSTAT_ARQSZ		(1<<15|1<<14|1<<13)
 #define AGPSTAT_ARQSZ_SHIFT	13
 
-#define AGPSTAT_AGP_ENABLE	(1<<8)
 #define AGPSTAT_SBA		(1<<9)
+#define AGPSTAT_AGP_ENABLE	(1<<8)
+#define AGPSTAT_FW		(1<<4)
+#define AGPSTAT_MODE_3_0	(1<<3)
 
 #define AGPSTAT2_1X		(1<<0)
 #define AGPSTAT2_2X		(1<<1)
 #define AGPSTAT2_4X		(1<<2)
-#define AGPSTAT_FW		(1<<4)
+
+#define AGPSTAT3_RSVD		(1<<2)
+#define AGPSTAT3_8X		(1<<1)
+#define AGPSTAT3_4X		(1)
 
 #endif				/* _AGP_BACKEND_PRIV_H */

drivers/char/agp/amd-k8-agp.c

@@ -253,8 +253,10 @@ static int __init agp_amdk8_probe(struct pci_dev *pdev,
 {
 	struct agp_bridge_data *bridge;
 	struct pci_dev *loop_dev;
+	u8 rev_id;
 	u8 cap_ptr;
 	int i = 0;
+	char *revstring="  ";
 
 	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 	if (!cap_ptr)
@@ -266,14 +268,38 @@ static int __init agp_amdk8_probe(struct pci_dev *pdev,
 	if (!bridge)
 		return -ENOMEM;
 
+	/* Assume here we have an 8151. (Later this assumption will be fixed). */
+	pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
+	switch (rev_id) {
+		case 0x01:	revstring="A0";
+				break;
+		case 0x02:	revstring="A1";
+				break;
+		case 0x11:	revstring="B0";
+				break;
+		case 0x12:	revstring="B1";
+				break;
+		case 0x13:	revstring="B2";
+				break;
+		default:	revstring="??";
+				break;
+	}
+	printk ("Detected AMD 8151 AGP Bridge rev %s", revstring);
+	/*
+	 * Work around errata.
+	 * Chips before B2 stepping incorrectly reporting v3.5
+	 */
+	if (rev_id < 0x13) {
+		bridge->major_version = 3;
+		bridge->minor_version = 0;
+	}
+
 	bridge->driver = &amd_8151_driver;
 	bridge->dev = pdev;
 	bridge->capndx = cap_ptr;
 
 	/* Fill in the mode register */
-	pci_read_config_dword(pdev,
-			bridge->capndx+PCI_AGP_STATUS,
-			&bridge->mode);
+	pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 
 	/* cache pci_devs of northbridges. */
 	pci_for_each_dev(loop_dev) {
@@ -290,7 +316,7 @@ static int __init agp_amdk8_probe(struct pci_dev *pdev,
 
 	pci_set_drvdata(pdev, bridge);
 	return agp_add_bridge(bridge);
- out_free:
+out_free:
 	agp_put_bridge(bridge);
 	return -ENOMEM;
 }

drivers/char/agp/generic.c

@@ -270,14 +270,16 @@ EXPORT_SYMBOL_GPL(agp_num_entries);
 int agp_copy_info(agp_kern_info * info)
 {
 	memset(info, 0, sizeof(agp_kern_info));
-	if (agp_bridge->type == NOT_SUPPORTED) {
-		info->chipset = agp_bridge->type;
+	if (!agp_bridge || agp_bridge->type == NOT_SUPPORTED ||
+	    !agp_bridge->version) {
+		info->chipset = NOT_SUPPORTED;
 		return -EIO;
 	}
+
 	info->version.major = agp_bridge->version->major;
 	info->version.minor = agp_bridge->version->minor;
-	info->device = agp_bridge->dev;
 	info->chipset = agp_bridge->type;
+	info->device = agp_bridge->dev;
 	info->mode = agp_bridge->mode;
 	info->aper_base = agp_bridge->gart_bus_addr;
 	info->aper_size = agp_return_size();
@@ -366,60 +368,106 @@ EXPORT_SYMBOL(agp_unbind_memory);
 
 
 /* Generic Agp routines - Start */
+static void agp_v2_parse_one(u32 *mode, u32 *cmd, u32 *tmp)
+{
+	/* disable SBA if it's not supported */
+	if (!((*cmd & AGPSTAT_SBA) && (*tmp & AGPSTAT_SBA) && (*mode & AGPSTAT_SBA)))
+		*cmd &= ~AGPSTAT_SBA;
+
+	/* disable FW if it's not supported */
+	if (!((*cmd & AGPSTAT_FW) && (*tmp & AGPSTAT_FW) && (*mode & AGPSTAT_FW)))
+		*cmd &= ~AGPSTAT_FW;
+
+	/* Set speed */
+	if (!((*cmd & AGPSTAT2_4X) && (*tmp & AGPSTAT2_4X) && (*mode & AGPSTAT2_4X)))
+		*cmd &= ~AGPSTAT2_4X;
+
+	if (!((*cmd & AGPSTAT2_2X) && (*tmp & AGPSTAT2_2X) && (*mode & AGPSTAT2_2X)))
+		*cmd &= ~AGPSTAT2_2X;
+
+	if (!((*cmd & AGPSTAT2_1X) && (*tmp & AGPSTAT2_1X) && (*mode & AGPSTAT2_1X)))
+		*cmd &= ~AGPSTAT2_1X;
+
+	/* Now we know what mode it should be, clear out the unwanted bits. */
+	if (*cmd & AGPSTAT2_4X)
+		*cmd &= ~(AGPSTAT2_1X | AGPSTAT2_2X);	/* 4X */
+
+	if (*cmd & AGPSTAT2_2X)
+		*cmd &= ~(AGPSTAT2_1X | AGPSTAT2_4X);	/* 2X */
+
+	if (*cmd & AGPSTAT2_1X)
+		*cmd &= ~(AGPSTAT2_2X | AGPSTAT2_4X);	/* 1Xf */
+}
 
-u32 agp_collect_device_status(u32 mode, u32 command)
+
+static void agp_v3_parse_one(u32 *mode, u32 *cmd, u32 *tmp)
+{
+	/* ARQSZ - Set the value to the maximum one.
+	 * Don't allow the mode register to override values. */
+	*cmd = ((*cmd & ~AGPSTAT_ARQSZ) |
+		max_t(u32,(*cmd & AGPSTAT_ARQSZ),(*tmp & AGPSTAT_ARQSZ)));
+
+	/* Calibration cycle.
+	 * Don't allow the mode register to override values. */
+	*cmd = ((*cmd & ~AGPSTAT_CAL_MASK) |
+		min_t(u32,(*cmd & AGPSTAT_CAL_MASK),(*tmp & AGPSTAT_CAL_MASK)));
+
+	/* SBA *must* be supported for AGP v3 */
+	*cmd |= AGPSTAT_SBA;
+
+	/* disable FW if it's not supported */
+	if (!((*cmd & AGPSTAT_FW) && (*tmp & AGPSTAT_FW) && (*mode & AGPSTAT_FW)))
+		*cmd &= ~AGPSTAT_FW;
+
+	/* Set speed. */
+	if (!((*cmd & AGPSTAT3_8X) && (*tmp & AGPSTAT3_8X) && (*mode & AGPSTAT3_8X)))
+		*cmd &= ~AGPSTAT3_8X;
+
+	if (!((*cmd & AGPSTAT3_4X) && (*tmp & AGPSTAT3_4X) && (*mode & AGPSTAT3_4X)))
+		*cmd &= ~AGPSTAT3_4X;
+
+	/* Clear out unwanted bits. */
+	if (*cmd & AGPSTAT3_8X)
+		*cmd *= ~(AGPSTAT3_4X | AGPSTAT3_RSVD);
+	if (*cmd & AGPSTAT3_4X)
+		*cmd *= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
+}
+
+//FIXME: This doesn't smell right.
+//We need a function we pass an agp_device to.
+u32 agp_collect_device_status(u32 mode, u32 cmd)
 {
 	struct pci_dev *device;
-	u8 agp;
-	u32 scratch; 
+	u8 cap_ptr;
+	u32 tmp;
+	u32 agp3;
 
 	pci_for_each_dev(device) {
-		agp = pci_find_capability(device, PCI_CAP_ID_AGP);
-		if (!agp)
+		cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP);
+		if (!cap_ptr)
 			continue;
 
 		/*
 		 * Ok, here we have a AGP device. Disable impossible 
 		 * settings, and adjust the readqueue to the minimum.
 		 */
-		pci_read_config_dword(device, agp + PCI_AGP_STATUS, &scratch);
+		pci_read_config_dword(device, cap_ptr+PCI_AGP_STATUS, &tmp);
 
 		/* adjust RQ depth */
-		command = ((command & ~AGPSTAT_RQ_DEPTH) |
+		cmd = ((cmd & ~AGPSTAT_RQ_DEPTH) |
 		     min_t(u32, (mode & AGPSTAT_RQ_DEPTH),
-			 min_t(u32, (command & AGPSTAT_RQ_DEPTH),
-			     (scratch & AGPSTAT_RQ_DEPTH))));
-
-		/* disable SBA if it's not supported */
-		if (!((command & AGPSTAT_SBA) && (scratch & AGPSTAT_SBA) && (mode & AGPSTAT_SBA)))
-			command &= ~AGPSTAT_SBA;
-
-		/* disable FW if it's not supported */
-		if (!((command & AGPSTAT_FW) && (scratch & AGPSTAT_FW) && (mode & AGPSTAT_FW)))
-			command &= ~AGPSTAT_FW;
-
-		/* Set speed */
-		if (!((command & AGPSTAT2_4X) && (scratch & AGPSTAT2_4X) && (mode & AGPSTAT2_4X)))
-			command &= ~AGPSTAT2_4X;
+			 min_t(u32, (cmd & AGPSTAT_RQ_DEPTH), (tmp & AGPSTAT_RQ_DEPTH))));
 		
-		if (!((command & AGPSTAT2_2X) && (scratch & AGPSTAT2_2X) && (mode & AGPSTAT2_2X)))
-			command &= ~AGPSTAT2_2X;
+		pci_read_config_dword(device, cap_ptr+AGPSTAT, &agp3);
 
-		if (!((command & AGPSTAT2_1X) && (scratch & AGPSTAT2_1X) && (mode & AGPSTAT2_1X)))
-			command &= ~AGPSTAT2_1X;
+		/* Check to see if we are operating in 3.0 mode */
+		if (agp3 & AGPSTAT_MODE_3_0) {
+			agp_v3_parse_one(&mode, &cmd, &tmp);
+		} else {
+			agp_v2_parse_one(&mode, &cmd, &tmp);
 		}
-
-	/* Now we know what mode it should be, clear out the unwanted bits. */
-	if (command & AGPSTAT2_4X)
-		command &= ~(AGPSTAT2_1X | AGPSTAT2_2X);	/* 4X */
-
-	if (command & AGPSTAT2_2X)
-		command &= ~(AGPSTAT2_1X | AGPSTAT2_4X);	/* 2X */
-
-	if (command & AGPSTAT2_1X)
-		command &= ~(AGPSTAT2_2X | AGPSTAT2_4X);	/* 1Xf */
-
-	return command;
+	}
+	return cmd;
 }
 EXPORT_SYMBOL(agp_collect_device_status);
 
@@ -446,29 +494,33 @@ void agp_device_command(u32 command, int agp_v3)
 EXPORT_SYMBOL(agp_device_command);
 
 
-void agp_generic_enable(u32 mode)
+void get_agp_version(struct agp_bridge_data *bridge)
 {
-	u32 command, ncapid, major, minor;
+	u32 ncapid;
+
+	/* Exit early if already set by errata workarounds. */
+	if (agp_bridge->major_version != 0)
+		return;
 
 	pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx, &ncapid);
-	major = (ncapid >> 20) & 0xf;
-	minor = (ncapid >> 16) & 0xf;
-	printk(KERN_INFO PFX "Found an AGP %d.%d compliant device.\n",major, minor);
+	agp_bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf;
+	agp_bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf;
+}
+EXPORT_SYMBOL(get_agp_version);
 
-	if(major >= 3) {
-		u32 agp_3_0;
 
-		pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + 0x4, &agp_3_0);
-		/* Check to see if we are operating in 3.0 mode */
-		if((agp_3_0 >> 3) & 0x1) {
-			agp_3_0_node_enable(agp_bridge, mode, minor);
-			return;
-		} else {
-			printk (KERN_INFO PFX "not in AGP 3.0 mode, falling back to 2.x\n");
-		}
-	}
+void agp_generic_enable(u32 mode)
+{
+	u32 command;
+	u32 agp3;
+
+	get_agp_version(agp_bridge);
+
+	printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n",
+				agp_bridge->major_version,
+				agp_bridge->minor_version,
+				agp_bridge->dev->slot_name);
 
-	/* AGP v<3 */
 	pci_read_config_dword(agp_bridge->dev,
 		      agp_bridge->capndx + PCI_AGP_STATUS, &command);
 
@@ -477,7 +529,27 @@ void agp_generic_enable(u32 mode)
 
 	pci_write_config_dword(agp_bridge->dev,
 		       agp_bridge->capndx + PCI_AGP_COMMAND, command);
-	agp_device_command(command, 0);
+
+	/* Do AGP version specific frobbing. */
+	if(agp_bridge->major_version >= 3) {
+		pci_read_config_dword(agp_bridge->dev,
+			agp_bridge->capndx+AGPSTAT, &agp3);
+
+		/* Check to see if we are operating in 3.0 mode */
+		if (agp3 & AGPSTAT_MODE_3_0) {
+			/* If we have 3.5, we can do the isoch stuff. */
+			if (agp_bridge->minor_version >= 5)
+				agp_3_5_enable(agp_bridge, mode);
+			agp_device_command(command, TRUE);
+			return;
+		} else {
+			printk (KERN_INFO PFX "Device is in legacy mode,"
+				" falling back to 2.x\n");
+		}
+	}
+
+	/* AGP v<3 */
+	agp_device_command(command, FALSE);
 }
 EXPORT_SYMBOL(agp_generic_enable);
 
@@ -831,6 +903,7 @@ void agp_enable(u32 mode)
 }
 EXPORT_SYMBOL(agp_enable);
 
+
 #ifdef CONFIG_SMP
 static void ipi_handler(void *null)
 {

drivers/char/agp/generic-3.0.c → drivers/char/agp/isoch.c

 /*
- * Generic routines for AGP 3.0 compliant bridges.
+ * Setup routines for AGP 3.5 compliant bridges.
  */
 
 #include <linux/list.h>
@@ -9,47 +9,47 @@
 
 #include "agp.h"
 
-/* Generic AGP 3.0 enabling routines */
+/* Generic AGP 3.5 enabling routines */
 
-struct agp_3_0_dev {
+struct agp_3_5_dev {
 	struct list_head list;
 	u8 capndx;
 	u32 maxbw;
 	struct pci_dev *dev;
 };
 
-static void agp_3_0_dev_list_insert(struct list_head *head, struct list_head *new)
+static void agp_3_5_dev_list_insert(struct list_head *head, struct list_head *new)
 {
-	struct agp_3_0_dev *cur, *n = list_entry(new, struct agp_3_0_dev, list);
+	struct agp_3_5_dev *cur, *n = list_entry(new, struct agp_3_5_dev, list);
 	struct list_head *pos;
 
 	list_for_each(pos, head) {
-		cur = list_entry(pos, struct agp_3_0_dev, list);
+		cur = list_entry(pos, struct agp_3_5_dev, list);
 		if(cur->maxbw > n->maxbw)
 			break;
 	}
 	list_add_tail(new, pos);
 }
 
-static void agp_3_0_dev_list_sort(struct agp_3_0_dev *list, unsigned int ndevs)
+static void agp_3_5_dev_list_sort(struct agp_3_5_dev *list, unsigned int ndevs)
 {
-	struct agp_3_0_dev *cur;
+	struct agp_3_5_dev *cur;
 	struct pci_dev *dev;
 	struct list_head *pos, *tmp, *head = &list->list, *start = head->next;
 	u32 nistat;
 
 	INIT_LIST_HEAD(head);
 
-	for(pos = start; pos != head;) {
-		cur = list_entry(pos, struct agp_3_0_dev, list);
+	for (pos=start; pos!=head; ) {
+		cur = list_entry(pos, struct agp_3_5_dev, list);
 		dev = cur->dev;
 
-		pci_read_config_dword(dev, cur->capndx + 0x0c, &nistat);
+		pci_read_config_dword(dev, cur->capndx+AGPNISTAT, &nistat);
 		cur->maxbw = (nistat >> 16) & 0xff;
 
 		tmp = pos;
 		pos = pos->next;
-		agp_3_0_dev_list_insert(head, tmp);
+		agp_3_5_dev_list_insert(head, tmp);
 	}
 }
 
@@ -59,8 +59,8 @@ static void agp_3_0_dev_list_sort(struct agp_3_0_dev *list, unsigned int ndevs)
  * lying behind it...)
  */
 
-static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
-		struct agp_3_0_dev *dev_list, unsigned int ndevs)
+static int agp_3_5_isochronous_node_enable(struct agp_bridge_data *bridge,
+		struct agp_3_5_dev *dev_list, unsigned int ndevs)
 {
 	/*
 	 * Convenience structure to make the calculations clearer
@@ -72,12 +72,12 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 		u32 y;
 		u32 l;
 		u32 rq;
-		struct agp_3_0_dev *dev;
+		struct agp_3_5_dev *dev;
 	};
 
 	struct pci_dev *td = bridge->dev, *dev;
 	struct list_head *head = &dev_list->list, *pos;
-	struct agp_3_0_dev *cur;
+	struct agp_3_5_dev *cur;
 	struct isoch_data *master, target;
 	unsigned int cdev = 0;
 	u32 mnistat, tnistat, tstatus, mcmd;
@@ -91,7 +91,7 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 	 * We'll work with an array of isoch_data's (one for each
 	 * device in dev_list) throughout this function.
 	 */
-	if((master = kmalloc(ndevs * sizeof(*master), GFP_KERNEL)) == NULL) {
+	if ((master = kmalloc(ndevs * sizeof(*master), GFP_KERNEL)) == NULL) {
 		ret = -ENOMEM;
 		goto get_out;
 	}
@@ -112,9 +112,9 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 	 * transfers are enabled and consequently whether maxbw will mean
 	 * anything.
 	 */
-	agp_3_0_dev_list_sort(dev_list, ndevs);
+	agp_3_5_dev_list_sort(dev_list, ndevs);
 
-	pci_read_config_dword(td, bridge->capndx + 0x0c, &tnistat);
+	pci_read_config_dword(td, bridge->capndx+AGPNISTAT, &tnistat);
 	pci_read_config_dword(td, bridge->capndx+AGPSTAT, &tstatus);
 
 	/* Extract power-on defaults from the target */
@@ -132,12 +132,12 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 	 * by these devices and the largest requested payload size.
 	 */
 	list_for_each(pos, head) {
-		cur = list_entry(pos, struct agp_3_0_dev, list);
+		cur = list_entry(pos, struct agp_3_5_dev, list);
 		dev = cur->dev;
 
 		mcapndx = cur->capndx;
 
-		pci_read_config_dword(dev, cur->capndx + 0x0c, &mnistat);
+		pci_read_config_dword(dev, cur->capndx+AGPNISTAT, &mnistat);
 
 		master[cdev].maxbw = (mnistat >> 16) & 0xff;
 		master[cdev].n     = (mnistat >> 8)  & 0xff;
@@ -151,7 +151,7 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 	}
 
 	/* Check if this configuration has any chance of working */
-	if(tot_bw > target.maxbw) {
+	if (tot_bw > target.maxbw) {
 		printk(KERN_ERR PFX "isochronous bandwidth required "
 			"by AGP 3.0 devices exceeds that which is supported by "
 			"the AGP 3.0 bridge!\n");
@@ -167,17 +167,17 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 	 * in the target's NISTAT register, so we need to do this now
 	 * to get an accurate value for ISOCH_N later.
 	 */
-	pci_read_config_word(td, bridge->capndx + 0x20, &tnicmd);
+	pci_read_config_word(td, bridge->capndx+AGPNICMD, &tnicmd);
 	tnicmd &= ~(0x3 << 6);
 	tnicmd |= target.y << 6;
-	pci_write_config_word(td, bridge->capndx + 0x20, tnicmd);
+	pci_write_config_word(td, bridge->capndx+AGPNICMD, tnicmd);
 
 	/* Reread the target's ISOCH_N */
-	pci_read_config_dword(td, bridge->capndx + 0x0c, &tnistat);
+	pci_read_config_dword(td, bridge->capndx+AGPNISTAT, &tnistat);
 	target.n = (tnistat >> 8) & 0xff;
 
 	/* Calculate the minimum ISOCH_N needed by each master */
-	for(cdev = 0; cdev < ndevs; cdev++) {
+	for (cdev=0; cdev<ndevs; cdev++) {
 		master[cdev].y = target.y;
 		master[cdev].n = master[cdev].maxbw / (master[cdev].y + 1);
 
@@ -186,7 +186,7 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 
 	/* Exit if the minimal ISOCH_N allocation among the masters is more
 	 * than the target can handle. */
-	if(tot_n > target.n) {
+	if (tot_n > target.n) {
 		printk(KERN_ERR PFX "number of isochronous "
 			"transactions per period required by AGP 3.0 devices "
 			"exceeds that which is supported by the AGP 3.0 "
@@ -204,7 +204,7 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 	 * Along the way, distribute the extra ISOCH_N capability calculated
 	 * above.
 	 */
-	for(cdev = 0; cdev < ndevs; cdev++) {
+	for (cdev=0; cdev<ndevs; cdev++) {
 		/*
 		 * This is a little subtle.  If ISOCH_Y > 64B, then ISOCH_Y
 		 * byte isochronous writes will be broken into 64B pieces.
@@ -213,13 +213,12 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 		 * many writes on the AGP bus).
 		 */
 		master[cdev].rq = master[cdev].n;
-		if(master[cdev].y > 0x1) {
+		if(master[cdev].y > 0x1)
 			master[cdev].rq *= (1 << (master[cdev].y - 1));
-		}
 
 		tot_rq += master[cdev].rq;
 
-		if(cdev == ndevs - 1)
+		if (cdev == ndevs-1)
 			master[cdev].n += rem;
 	}
 
@@ -230,7 +229,7 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 
 	/* Exit if the minimal RQ needs of the masters exceeds what the target
 	 * can provide. */
-	if(tot_rq > rq_isoch) {
+	if (tot_rq > rq_isoch) {
 		printk(KERN_ERR PFX "number of request queue slots "
 			"required by the isochronous bandwidth requested by "
 			"AGP 3.0 devices exceeds the number provided by the "
@@ -247,7 +246,7 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 
 	/* Distribute the extra RQ slots calculated above and write our
 	 * isochronous settings out to the actual devices. */
-	for(cdev = 0; cdev < ndevs; cdev++) {
+	for (cdev=0; cdev<ndevs; cdev++) {
 		cur = master[cdev].dev;
 		dev = cur->dev;
 
@@ -256,7 +255,7 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 		master[cdev].rq += (cdev == ndevs - 1)
 		              ? (rem_async + rem_isoch) : step;
 
-		pci_read_config_word(dev, cur->capndx + 0x20, &mnicmd);
+		pci_read_config_word(dev, cur->capndx+AGPNICMD, &mnicmd);
 		pci_read_config_dword(dev, cur->capndx+AGPCMD, &mcmd);
 
 		mnicmd &= ~(0xff << 8);
@@ -268,7 +267,7 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
 		mcmd   |= master[cdev].rq << 24;
 
 		pci_write_config_dword(dev, cur->capndx+AGPCMD, mcmd);
-		pci_write_config_word(dev, cur->capndx + 0x20, mnicmd);
+		pci_write_config_word(dev, cur->capndx+AGPNICMD, mnicmd);
 	}
 
 free_and_exit:
@@ -285,24 +284,24 @@ static int agp_3_0_isochronous_node_enable(struct agp_bridge_data *bridge,
  * target by ndevs.  Distribute this many slots to each AGP 3.0 device,
  * giving any left over slots to the last device in dev_list.
  */
-static void agp_3_0_nonisochronous_node_enable(struct agp_bridge_data *bridge,
-		struct agp_3_0_dev *dev_list, unsigned int ndevs)
+static void agp_3_5_nonisochronous_node_enable(struct agp_bridge_data *bridge,
+		struct agp_3_5_dev *dev_list, unsigned int ndevs)
 {
-	struct agp_3_0_dev *cur;
+	struct agp_3_5_dev *cur;
 	struct list_head *head = &dev_list->list, *pos;
 	u32 tstatus, mcmd;
 	u32 trq, mrq, rem;
 	unsigned int cdev = 0;
 
-	pci_read_config_dword(bridge->dev, bridge->capndx + 0x04, &tstatus);
+	pci_read_config_dword(bridge->dev, bridge->capndx+AGPSTAT, &tstatus);
 
 	trq = (tstatus >> 24) & 0xff;
 	mrq = trq / ndevs;
 
 	rem = mrq + (trq % ndevs);
 
-	for(pos = head->next; cdev < ndevs; cdev++, pos = pos->next) {
-		cur = list_entry(pos, struct agp_3_0_dev, list);
+	for (pos=head->next; cdev<ndevs; cdev++, pos=pos->next) {
+		cur = list_entry(pos, struct agp_3_5_dev, list);
 
 		pci_read_config_dword(cur->dev, cur->capndx+AGPCMD, &mcmd);
 		mcmd &= ~(0xff << 24);
@@ -315,24 +314,32 @@ static void agp_3_0_nonisochronous_node_enable(struct agp_bridge_data *bridge,
  * Fully configure and enable an AGP 3.0 host bridge and all the devices
  * lying behind it.
  */
-int agp_3_0_node_enable(struct agp_bridge_data *bridge, u32 mode, u32 minor)
+int agp_3_5_enable(struct agp_bridge_data *bridge, u32 mode)
 {
 	struct pci_dev *td = bridge->dev, *dev;
 	u8 mcapndx;
-	u32 isoch, arqsz, cal_cycle, tmp, rate;
-	u32 tstatus, tcmd, mcmd, mstatus, ncapid;
-	u32 mmajor, mminor;
+	u32 isoch, arqsz;
+	u32 tstatus, mstatus, ncapid;
+	u32 mmajor;
 	u16 mpstat;
-	struct agp_3_0_dev *dev_list, *cur;
+	struct agp_3_5_dev *dev_list, *cur;
 	struct list_head *head, *pos;
 	unsigned int ndevs = 0;
 	int ret = 0;
 
+	/* Extract some power-on defaults from the target */
+	pci_read_config_dword(td, bridge->capndx+AGPSTAT, &tstatus);
+	isoch     = (tstatus >> 17) & 0x1;
+	if (isoch == 0)	/* isoch xfers not available, bail out. */
+		return -ENODEV;
+
+	arqsz     = (tstatus >> 13) & 0x7;
+
 	/* 
-	 * Allocate a head for our AGP 3.0 device list (multiple AGP 3.0
-	 * devices are allowed behind a single bridge). 
+	 * Allocate a head for our AGP 3.5 device list
+	 * (multiple AGP v3 devices are allowed behind a single bridge). 
 	 */
-	if((dev_list = kmalloc(sizeof(*dev_list), GFP_KERNEL)) == NULL) {
+	if ((dev_list = kmalloc(sizeof(*dev_list), GFP_KERNEL)) == NULL) {
 		ret = -ENOMEM;
 		goto get_out;
 	}
@@ -342,6 +349,9 @@ int agp_3_0_node_enable(struct agp_bridge_data *bridge, u32 mode, u32 minor)
 	/* Find all AGP devices, and add them to dev_list. */
 	pci_for_each_dev(dev) { 
 		mcapndx = pci_find_capability(dev, PCI_CAP_ID_AGP);
+		if (mcapndx == 0)
+			continue;
+
 		switch ((dev->class >>8) & 0xff00) {
 			case 0x0600:    /* Bridge */
 				/* Skip bridges. We should call this function for each one. */
@@ -357,9 +367,6 @@ int agp_3_0_node_enable(struct agp_bridge_data *bridge, u32 mode, u32 minor)
 
 			case 0x0300:    /* Display controller */
 			case 0x0400:    /* Multimedia controller */
-				if (mcapndx == 0)
-					continue;
-
 				if((cur = kmalloc(sizeof(*cur), GFP_KERNEL)) == NULL) {
 					ret = -ENOMEM;
 					goto free_and_exit;
@@ -376,51 +383,41 @@ int agp_3_0_node_enable(struct agp_bridge_data *bridge, u32 mode, u32 minor)
 		}
 	}
 
-	/* Extract some power-on defaults from the target */
-	pci_read_config_dword(td, bridge->capndx + 0x04, &tstatus);
-	isoch     = (tstatus >> 17) & 0x1;
-	arqsz     = (tstatus >> 13) & 0x7;
-	cal_cycle = (tstatus >> 10) & 0x7;
-	rate      = tstatus & 0x7;
-
 	/*
 	 * Take an initial pass through the devices lying behind our host
 	 * bridge.  Make sure each one is actually an AGP 3.0 device, otherwise
 	 * exit with an error message.  Along the way store the AGP 3.0
-	 * cap_ptr for each device, the minimum supported cal_cycle, and the
-	 * minimum supported data rate.
+	 * cap_ptr for each device
 	 */
 	list_for_each(pos, head) {
-		cur = list_entry(pos, struct agp_3_0_dev, list);
+		cur = list_entry(pos, struct agp_3_5_dev, list);
 		dev = cur->dev;
 		
 		pci_read_config_word(dev, PCI_STATUS, &mpstat);
-		if((mpstat & PCI_STATUS_CAP_LIST) == 0)
+		if ((mpstat & PCI_STATUS_CAP_LIST) == 0)
 			continue;
 
 		pci_read_config_byte(dev, PCI_CAPABILITY_LIST, &mcapndx);
-		if (mcapndx != 0x00) {
+		if (mcapndx != 0) {
 			do {
 				pci_read_config_dword(dev, mcapndx, &ncapid);
-				if ((ncapid & 0xff) != 0x02)
+				if ((ncapid & 0xff) != 2)
 					mcapndx = (ncapid >> 8) & 0xff;
 			}
-			while (((ncapid & 0xff) != 0x02) && (mcapndx != 0x00));
+			while (((ncapid & 0xff) != 2) && (mcapndx != 0));
 		}
 
-		if(mcapndx == 0) {
+		if (mcapndx == 0) {
 			printk(KERN_ERR PFX "woah!  Non-AGP device "
-				"found on the secondary bus of an AGP 3.0 bridge!\n");
+				"found on the secondary bus of an AGP 3.5 bridge!\n");
 			ret = -ENODEV;
 			goto free_and_exit;
 		}
 
 		mmajor = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf;
-		mminor = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf;
-
-		if(mmajor < 3) {
+		if (mmajor < 3) {
 			printk(KERN_ERR PFX "woah!  AGP 2.0 device "
-				"found on the secondary bus of an AGP 3.0 "
+				"found on the secondary bus of an AGP 3.5 "
 				"bridge operating with AGP 3.0 electricals!\n");
 			ret = -ENODEV;
 			goto free_and_exit;
@@ -428,40 +425,16 @@ int agp_3_0_node_enable(struct agp_bridge_data *bridge, u32 mode, u32 minor)
 
 		cur->capndx = mcapndx;
 
-		pci_read_config_dword(dev, cur->capndx + 0x04, &mstatus);
+		pci_read_config_dword(dev, cur->capndx+AGPSTAT, &mstatus);
 
-		if(((mstatus >> 3) & 0x1) == 0) {
-			printk(KERN_ERR PFX "woah!  AGP 3.0 device "
-				"not operating in AGP 3.0 mode found on the "
-				"secondary bus of an AGP 3.0 bridge operating "
+		if (((mstatus >> 3) & 0x1) == 0) {
+			printk(KERN_ERR PFX "woah!  AGP 3.x device "
+				"not operating in AGP 3.x mode found on the "
+				"secondary bus of an AGP 3.5 bridge operating "
 				"with AGP 3.0 electricals!\n");
 			ret = -ENODEV;
 			goto free_and_exit;
 		}
-
-		tmp = (mstatus >> 10) & 0x7;
-		cal_cycle = min(cal_cycle, tmp);
-
-		/* figure the lesser rate */
-		tmp = mstatus & 0x7;
-		if(tmp < rate) 
-			rate = tmp;
-			
-	}		
-
-	/* Turn rate into something we can actually write out to AGPCMD */
-	switch(rate) {
-	case 0x1:
-	case 0x2:
-		break;
-	case 0x3:
-		rate = 0x2;
-		break;
-	default:
-		printk(KERN_ERR PFX "woah!  Bogus AGP rate (%d) "
-			"value found advertised behind an AGP 3.0 bridge!\n", rate);
-		ret = -ENODEV;
-		goto free_and_exit;
 	}		
 
 	/*
@@ -470,59 +443,19 @@ int agp_3_0_node_enable(struct agp_bridge_data *bridge, u32 mode, u32 minor)
 	 * whether isochronous transfers are supported.
 	 */
 	if (isoch) {
-		ret = agp_3_0_isochronous_node_enable(bridge, dev_list, ndevs);
+		ret = agp_3_5_isochronous_node_enable(bridge, dev_list, ndevs);
 		if (ret) {
 			printk(KERN_INFO PFX "Something bad happened setting "
 			       "up isochronous xfers.  Falling back to "
 			       "non-isochronous xfer mode.\n");
 		}
 	}
-	agp_3_0_nonisochronous_node_enable(bridge, dev_list, ndevs);
-
-	/*
-	 * Set the calculated minimum supported cal_cycle and minimum
-	 * supported transfer rate in the target's AGPCMD register.
-	 * Also set the AGP_ENABLE bit, effectively 'turning on' the
-	 * target (this has to be done _before_ turning on the masters).
-	 */
-	pci_read_config_dword(td, bridge->capndx+AGPCMD, &tcmd);
-
-	tcmd &= ~(0x7 << 10);
-	tcmd &= ~0x7;
-
-	tcmd |= cal_cycle << 10;
-	tcmd |= 0x1 << 8;
-	tcmd |= rate;
-
-	pci_write_config_dword(td, bridge->capndx+AGPCMD, tcmd);
-
-	/*
-	 * Set the target's advertised arqsz value, the minimum supported
-	 * transfer rate, and the AGP_ENABLE bit in each master's AGPCMD
-	 * register.
-	 */
-	list_for_each(pos, head) {
-		cur = list_entry(pos, struct agp_3_0_dev, list);
-		dev = cur->dev;
-
-		mcapndx = cur->capndx;
-
-		pci_read_config_dword(dev, cur->capndx+AGPCMD, &mcmd);
-
-		mcmd &= ~(0x7 << AGPSTAT_ARQSZ_SHIFT);
-		mcmd &= ~0x7;
-
-		mcmd |= arqsz << 13;
-		mcmd |= AGPSTAT_AGP_ENABLE;
-		mcmd |= rate;
-
-		pci_write_config_dword(dev, cur->capndx+AGPCMD, mcmd);
-	}
+	agp_3_5_nonisochronous_node_enable(bridge, dev_list, ndevs);
 
 free_and_exit:
 	/* Be sure to free the dev_list */
-	for(pos = head->next; pos != head;) {
-		cur = list_entry(pos, struct agp_3_0_dev, list);
+	for (pos=head->next; pos!=head; ) {
+		cur = list_entry(pos, struct agp_3_5_dev, list);
 
 		pos = pos->next;
 		kfree(cur);
@@ -533,5 +466,3 @@ int agp_3_0_node_enable(struct agp_bridge_data *bridge, u32 mode, u32 minor)
 	return ret;
 }
 
-EXPORT_SYMBOL_GPL(agp_3_0_node_enable);
-

drivers/char/drm/Kconfig

@@ -49,7 +49,7 @@ config DRM_RADEON
 
 config DRM_I810
 	tristate "Intel I810"
-	depends on DRM && AGP
+	depends on DRM && AGP && AGP_INTEL
 	help
 	  Choose this option if you have an Intel I810 graphics card.  If M is
 	  selected, the module will be called i810.  AGP support is required
@@ -57,7 +57,7 @@ config DRM_I810
 
 config DRM_I830
 	tristate "Intel 830M, 845G, 852GM, 855GM, 865G"
-	depends on DRM && AGP
+	depends on DRM && AGP && AGP_INTEL
 	help
 	  Choose this option if you have a system that has Intel 830M, 845G,
 	  852GM, 855GM or 865G integrated graphics.  If M is selected, the