2 * sata_mv.c - Marvell SATA support
4 * Copyright 2005: EMC Corporation, all rights reserved.
6 * Please ALWAYS copy linux-ide@vger.kernel.org on emails.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/pci.h>
26 #include <linux/init.h>
27 #include <linux/blkdev.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/sched.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/device.h>
33 #include <scsi/scsi_host.h>
34 #include <scsi/scsi_cmnd.h>
35 #include <linux/libata.h>
38 #define DRV_NAME "sata_mv"
39 #define DRV_VERSION "0.25"
42 /* BAR's are enumerated in terms of pci_resource_start() terms */
43 MV_PRIMARY_BAR = 0, /* offset 0x10: memory space */
44 MV_IO_BAR = 2, /* offset 0x18: IO space */
45 MV_MISC_BAR = 3, /* offset 0x1c: FLASH, NVRAM, SRAM */
47 MV_MAJOR_REG_AREA_SZ = 0x10000, /* 64KB */
48 MV_MINOR_REG_AREA_SZ = 0x2000, /* 8KB */
51 MV_IRQ_COAL_REG_BASE = 0x18000, /* 6xxx part only */
52 MV_SATAHC0_REG_BASE = 0x20000,
54 MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ,
55 MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ,
56 MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */
57 MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ,
59 MV_USE_Q_DEPTH = ATA_DEF_QUEUE,
62 MV_MAX_Q_DEPTH_MASK = MV_MAX_Q_DEPTH - 1,
64 /* CRQB needs alignment on a 1KB boundary. Size == 1KB
65 * CRPB needs alignment on a 256B boundary. Size == 256B
66 * SG count of 176 leads to MV_PORT_PRIV_DMA_SZ == 4KB
67 * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B
69 MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH),
70 MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH),
72 MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT),
73 MV_PORT_PRIV_DMA_SZ = (MV_CRQB_Q_SZ + MV_CRPB_Q_SZ + MV_SG_TBL_SZ),
76 /* == (port / MV_PORTS_PER_HC) to determine HC from 0-7 port */
78 /* == (port % MV_PORTS_PER_HC) to determine hard port from 0-7 port */
82 MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */
83 MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */
84 MV_FLAG_GLBL_SFT_RST = (1 << 28), /* Global Soft Reset support */
85 MV_COMMON_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
86 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO),
87 MV_6XXX_FLAGS = (MV_FLAG_IRQ_COALESCE |
88 MV_FLAG_GLBL_SFT_RST),
95 CRQB_FLAG_READ = (1 << 0),
97 CRQB_CMD_ADDR_SHIFT = 8,
98 CRQB_CMD_CS = (0x2 << 11),
99 CRQB_CMD_LAST = (1 << 15),
101 CRPB_FLAG_STATUS_SHIFT = 8,
103 EPRD_FLAG_END_OF_TBL = (1 << 31),
105 /* PCI interface registers */
107 PCI_COMMAND_OFS = 0xc00,
109 PCI_MAIN_CMD_STS_OFS = 0xd30,
110 STOP_PCI_MASTER = (1 << 2),
111 PCI_MASTER_EMPTY = (1 << 3),
112 GLOB_SFT_RST = (1 << 4),
114 PCI_IRQ_CAUSE_OFS = 0x1d58,
115 PCI_IRQ_MASK_OFS = 0x1d5c,
116 PCI_UNMASK_ALL_IRQS = 0x7fffff, /* bits 22-0 */
118 HC_MAIN_IRQ_CAUSE_OFS = 0x1d60,
119 HC_MAIN_IRQ_MASK_OFS = 0x1d64,
120 PORT0_ERR = (1 << 0), /* shift by port # */
121 PORT0_DONE = (1 << 1), /* shift by port # */
122 HC0_IRQ_PEND = 0x1ff, /* bits 0-8 = HC0's ports */
123 HC_SHIFT = 9, /* bits 9-17 = HC1's ports */
125 TRAN_LO_DONE = (1 << 19), /* 6xxx: IRQ coalescing */
126 TRAN_HI_DONE = (1 << 20), /* 6xxx: IRQ coalescing */
127 PORTS_0_7_COAL_DONE = (1 << 21), /* 6xxx: IRQ coalescing */
128 GPIO_INT = (1 << 22),
129 SELF_INT = (1 << 23),
130 TWSI_INT = (1 << 24),
131 HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */
132 HC_MAIN_MASKED_IRQS = (TRAN_LO_DONE | TRAN_HI_DONE |
133 PORTS_0_7_COAL_DONE | GPIO_INT | TWSI_INT |
136 /* SATAHC registers */
139 HC_IRQ_CAUSE_OFS = 0x14,
140 CRPB_DMA_DONE = (1 << 0), /* shift by port # */
141 HC_IRQ_COAL = (1 << 4), /* IRQ coalescing */
142 DEV_IRQ = (1 << 8), /* shift by port # */
144 /* Shadow block registers */
146 SHD_CTL_AST_OFS = 0x20, /* ofs from SHD_BLK_OFS */
149 SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */
150 SATA_ACTIVE_OFS = 0x350,
154 EDMA_CFG_Q_DEPTH = 0, /* queueing disabled */
155 EDMA_CFG_NCQ = (1 << 5),
156 EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */
157 EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */
158 EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */
160 EDMA_ERR_IRQ_CAUSE_OFS = 0x8,
161 EDMA_ERR_IRQ_MASK_OFS = 0xc,
162 EDMA_ERR_D_PAR = (1 << 0),
163 EDMA_ERR_PRD_PAR = (1 << 1),
164 EDMA_ERR_DEV = (1 << 2),
165 EDMA_ERR_DEV_DCON = (1 << 3),
166 EDMA_ERR_DEV_CON = (1 << 4),
167 EDMA_ERR_SERR = (1 << 5),
168 EDMA_ERR_SELF_DIS = (1 << 7),
169 EDMA_ERR_BIST_ASYNC = (1 << 8),
170 EDMA_ERR_CRBQ_PAR = (1 << 9),
171 EDMA_ERR_CRPB_PAR = (1 << 10),
172 EDMA_ERR_INTRL_PAR = (1 << 11),
173 EDMA_ERR_IORDY = (1 << 12),
174 EDMA_ERR_LNK_CTRL_RX = (0xf << 13),
175 EDMA_ERR_LNK_CTRL_RX_2 = (1 << 15),
176 EDMA_ERR_LNK_DATA_RX = (0xf << 17),
177 EDMA_ERR_LNK_CTRL_TX = (0x1f << 21),
178 EDMA_ERR_LNK_DATA_TX = (0x1f << 26),
179 EDMA_ERR_TRANS_PROTO = (1 << 31),
180 EDMA_ERR_FATAL = (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
181 EDMA_ERR_DEV_DCON | EDMA_ERR_CRBQ_PAR |
182 EDMA_ERR_CRPB_PAR | EDMA_ERR_INTRL_PAR |
183 EDMA_ERR_IORDY | EDMA_ERR_LNK_CTRL_RX_2 |
184 EDMA_ERR_LNK_DATA_RX |
185 EDMA_ERR_LNK_DATA_TX |
186 EDMA_ERR_TRANS_PROTO),
188 EDMA_REQ_Q_BASE_HI_OFS = 0x10,
189 EDMA_REQ_Q_IN_PTR_OFS = 0x14, /* also contains BASE_LO */
191 EDMA_REQ_Q_OUT_PTR_OFS = 0x18,
192 EDMA_REQ_Q_PTR_SHIFT = 5,
194 EDMA_RSP_Q_BASE_HI_OFS = 0x1c,
195 EDMA_RSP_Q_IN_PTR_OFS = 0x20,
196 EDMA_RSP_Q_OUT_PTR_OFS = 0x24, /* also contains BASE_LO */
197 EDMA_RSP_Q_PTR_SHIFT = 3,
204 /* Host private flags (hp_flags) */
205 MV_HP_FLAG_MSI = (1 << 0),
207 /* Port private flags (pp_flags) */
208 MV_PP_FLAG_EDMA_EN = (1 << 0),
209 MV_PP_FLAG_EDMA_DS_ACT = (1 << 1),
213 /* Our DMA boundary is determined by an ePRD being unable to handle
214 * anything larger than 64KB
216 MV_DMA_BOUNDARY = 0xffffU,
218 EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U,
220 EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U,
223 /* Command ReQuest Block: 32B */
231 /* Command ResPonse Block: 8B */
238 /* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */
246 struct mv_port_priv {
247 struct mv_crqb *crqb;
249 struct mv_crpb *crpb;
251 struct mv_sg *sg_tbl;
252 dma_addr_t sg_tbl_dma;
254 unsigned req_producer; /* cp of req_in_ptr */
255 unsigned rsp_consumer; /* cp of rsp_out_ptr */
259 struct mv_host_priv {
263 static void mv_irq_clear(struct ata_port *ap);
264 static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in);
265 static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
266 static void mv_phy_reset(struct ata_port *ap);
267 static void mv_host_stop(struct ata_host_set *host_set);
268 static int mv_port_start(struct ata_port *ap);
269 static void mv_port_stop(struct ata_port *ap);
270 static void mv_qc_prep(struct ata_queued_cmd *qc);
271 static int mv_qc_issue(struct ata_queued_cmd *qc);
272 static irqreturn_t mv_interrupt(int irq, void *dev_instance,
273 struct pt_regs *regs);
274 static void mv_eng_timeout(struct ata_port *ap);
275 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
277 static struct scsi_host_template mv_sht = {
278 .module = THIS_MODULE,
280 .ioctl = ata_scsi_ioctl,
281 .queuecommand = ata_scsi_queuecmd,
282 .eh_strategy_handler = ata_scsi_error,
283 .can_queue = MV_USE_Q_DEPTH,
284 .this_id = ATA_SHT_THIS_ID,
285 .sg_tablesize = MV_MAX_SG_CT,
286 .max_sectors = ATA_MAX_SECTORS,
287 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
288 .emulated = ATA_SHT_EMULATED,
289 .use_clustering = ATA_SHT_USE_CLUSTERING,
290 .proc_name = DRV_NAME,
291 .dma_boundary = MV_DMA_BOUNDARY,
292 .slave_configure = ata_scsi_slave_config,
293 .bios_param = ata_std_bios_param,
297 static const struct ata_port_operations mv_ops = {
298 .port_disable = ata_port_disable,
300 .tf_load = ata_tf_load,
301 .tf_read = ata_tf_read,
302 .check_status = ata_check_status,
303 .exec_command = ata_exec_command,
304 .dev_select = ata_std_dev_select,
306 .phy_reset = mv_phy_reset,
308 .qc_prep = mv_qc_prep,
309 .qc_issue = mv_qc_issue,
311 .eng_timeout = mv_eng_timeout,
313 .irq_handler = mv_interrupt,
314 .irq_clear = mv_irq_clear,
316 .scr_read = mv_scr_read,
317 .scr_write = mv_scr_write,
319 .port_start = mv_port_start,
320 .port_stop = mv_port_stop,
321 .host_stop = mv_host_stop,
324 static struct ata_port_info mv_port_info[] = {
327 .host_flags = MV_COMMON_FLAGS,
328 .pio_mask = 0x1f, /* pio0-4 */
329 .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */
334 .host_flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC),
335 .pio_mask = 0x1f, /* pio0-4 */
336 .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */
341 .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
342 .pio_mask = 0x1f, /* pio0-4 */
343 .udma_mask = 0x7f, /* udma0-6 */
348 .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS |
350 .pio_mask = 0x1f, /* pio0-4 */
351 .udma_mask = 0x7f, /* udma0-6 */
356 static const struct pci_device_id mv_pci_tbl[] = {
357 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5040), 0, 0, chip_504x},
358 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5041), 0, 0, chip_504x},
359 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5080), 0, 0, chip_508x},
360 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5081), 0, 0, chip_508x},
362 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6040), 0, 0, chip_604x},
363 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6041), 0, 0, chip_604x},
364 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6080), 0, 0, chip_608x},
365 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6081), 0, 0, chip_608x},
367 {PCI_DEVICE(PCI_VENDOR_ID_ADAPTEC2, 0x0241), 0, 0, chip_604x},
368 {} /* terminate list */
371 static struct pci_driver mv_pci_driver = {
373 .id_table = mv_pci_tbl,
374 .probe = mv_init_one,
375 .remove = ata_pci_remove_one,
382 static inline void writelfl(unsigned long data, void __iomem *addr)
385 (void) readl(addr); /* flush to avoid PCI posted write */
388 static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc)
390 return (base + MV_SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ));
393 static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port)
395 return (mv_hc_base(base, port >> MV_PORT_HC_SHIFT) +
396 MV_SATAHC_ARBTR_REG_SZ +
397 ((port & MV_PORT_MASK) * MV_PORT_REG_SZ));
400 static inline void __iomem *mv_ap_base(struct ata_port *ap)
402 return mv_port_base(ap->host_set->mmio_base, ap->port_no);
405 static inline int mv_get_hc_count(unsigned long hp_flags)
407 return ((hp_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
410 static void mv_irq_clear(struct ata_port *ap)
415 * mv_start_dma - Enable eDMA engine
416 * @base: port base address
417 * @pp: port private data
419 * Verify the local cache of the eDMA state is accurate with an
423 * Inherited from caller.
425 static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp)
427 if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) {
428 writelfl(EDMA_EN, base + EDMA_CMD_OFS);
429 pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
431 assert(EDMA_EN & readl(base + EDMA_CMD_OFS));
435 * mv_stop_dma - Disable eDMA engine
436 * @ap: ATA channel to manipulate
438 * Verify the local cache of the eDMA state is accurate with an
442 * Inherited from caller.
444 static void mv_stop_dma(struct ata_port *ap)
446 void __iomem *port_mmio = mv_ap_base(ap);
447 struct mv_port_priv *pp = ap->private_data;
451 if (MV_PP_FLAG_EDMA_EN & pp->pp_flags) {
452 /* Disable EDMA if active. The disable bit auto clears.
454 writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS);
455 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
457 assert(!(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)));
460 /* now properly wait for the eDMA to stop */
461 for (i = 1000; i > 0; i--) {
462 reg = readl(port_mmio + EDMA_CMD_OFS);
463 if (!(EDMA_EN & reg)) {
470 printk(KERN_ERR "ata%u: Unable to stop eDMA\n", ap->id);
471 /* FIXME: Consider doing a reset here to recover */
476 static void mv_dump_mem(void __iomem *start, unsigned bytes)
479 for (b = 0; b < bytes; ) {
480 DPRINTK("%p: ", start + b);
481 for (w = 0; b < bytes && w < 4; w++) {
482 printk("%08x ",readl(start + b));
490 static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes)
495 for (b = 0; b < bytes; ) {
496 DPRINTK("%02x: ", b);
497 for (w = 0; b < bytes && w < 4; w++) {
498 (void) pci_read_config_dword(pdev,b,&dw);
506 static void mv_dump_all_regs(void __iomem *mmio_base, int port,
507 struct pci_dev *pdev)
510 void __iomem *hc_base = mv_hc_base(mmio_base,
511 port >> MV_PORT_HC_SHIFT);
512 void __iomem *port_base;
513 int start_port, num_ports, p, start_hc, num_hcs, hc;
516 start_hc = start_port = 0;
517 num_ports = 8; /* shld be benign for 4 port devs */
520 start_hc = port >> MV_PORT_HC_SHIFT;
522 num_ports = num_hcs = 1;
524 DPRINTK("All registers for port(s) %u-%u:\n", start_port,
525 num_ports > 1 ? num_ports - 1 : start_port);
528 DPRINTK("PCI config space regs:\n");
529 mv_dump_pci_cfg(pdev, 0x68);
531 DPRINTK("PCI regs:\n");
532 mv_dump_mem(mmio_base+0xc00, 0x3c);
533 mv_dump_mem(mmio_base+0xd00, 0x34);
534 mv_dump_mem(mmio_base+0xf00, 0x4);
535 mv_dump_mem(mmio_base+0x1d00, 0x6c);
536 for (hc = start_hc; hc < start_hc + num_hcs; hc++) {
537 hc_base = mv_hc_base(mmio_base, port >> MV_PORT_HC_SHIFT);
538 DPRINTK("HC regs (HC %i):\n", hc);
539 mv_dump_mem(hc_base, 0x1c);
541 for (p = start_port; p < start_port + num_ports; p++) {
542 port_base = mv_port_base(mmio_base, p);
543 DPRINTK("EDMA regs (port %i):\n",p);
544 mv_dump_mem(port_base, 0x54);
545 DPRINTK("SATA regs (port %i):\n",p);
546 mv_dump_mem(port_base+0x300, 0x60);
551 static unsigned int mv_scr_offset(unsigned int sc_reg_in)
559 ofs = SATA_STATUS_OFS + (sc_reg_in * sizeof(u32));
562 ofs = SATA_ACTIVE_OFS; /* active is not with the others */
571 static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
573 unsigned int ofs = mv_scr_offset(sc_reg_in);
575 if (0xffffffffU != ofs) {
576 return readl(mv_ap_base(ap) + ofs);
582 static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
584 unsigned int ofs = mv_scr_offset(sc_reg_in);
586 if (0xffffffffU != ofs) {
587 writelfl(val, mv_ap_base(ap) + ofs);
592 * mv_global_soft_reset - Perform the 6xxx global soft reset
593 * @mmio_base: base address of the HBA
595 * This routine only applies to 6xxx parts.
598 * Inherited from caller.
600 static int mv_global_soft_reset(void __iomem *mmio_base)
602 void __iomem *reg = mmio_base + PCI_MAIN_CMD_STS_OFS;
606 /* Following procedure defined in PCI "main command and status
610 writel(t | STOP_PCI_MASTER, reg);
612 for (i = 0; i < 1000; i++) {
615 if (PCI_MASTER_EMPTY & t) {
619 if (!(PCI_MASTER_EMPTY & t)) {
620 printk(KERN_ERR DRV_NAME ": PCI master won't flush\n");
628 writel(t | GLOB_SFT_RST, reg);
631 } while (!(GLOB_SFT_RST & t) && (i-- > 0));
633 if (!(GLOB_SFT_RST & t)) {
634 printk(KERN_ERR DRV_NAME ": can't set global reset\n");
639 /* clear reset and *reenable the PCI master* (not mentioned in spec) */
642 writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg);
645 } while ((GLOB_SFT_RST & t) && (i-- > 0));
647 if (GLOB_SFT_RST & t) {
648 printk(KERN_ERR DRV_NAME ": can't clear global reset\n");
656 * mv_host_stop - Host specific cleanup/stop routine.
657 * @host_set: host data structure
659 * Disable ints, cleanup host memory, call general purpose
663 * Inherited from caller.
665 static void mv_host_stop(struct ata_host_set *host_set)
667 struct mv_host_priv *hpriv = host_set->private_data;
668 struct pci_dev *pdev = to_pci_dev(host_set->dev);
670 if (hpriv->hp_flags & MV_HP_FLAG_MSI) {
671 pci_disable_msi(pdev);
676 ata_host_stop(host_set);
679 static inline void mv_priv_free(struct mv_port_priv *pp, struct device *dev)
681 dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma);
685 * mv_port_start - Port specific init/start routine.
686 * @ap: ATA channel to manipulate
688 * Allocate and point to DMA memory, init port private memory,
692 * Inherited from caller.
694 static int mv_port_start(struct ata_port *ap)
696 struct device *dev = ap->host_set->dev;
697 struct mv_port_priv *pp;
698 void __iomem *port_mmio = mv_ap_base(ap);
703 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
706 memset(pp, 0, sizeof(*pp));
708 mem = dma_alloc_coherent(dev, MV_PORT_PRIV_DMA_SZ, &mem_dma,
712 memset(mem, 0, MV_PORT_PRIV_DMA_SZ);
714 rc = ata_pad_alloc(ap, dev);
718 /* First item in chunk of DMA memory:
719 * 32-slot command request table (CRQB), 32 bytes each in size
722 pp->crqb_dma = mem_dma;
724 mem_dma += MV_CRQB_Q_SZ;
727 * 32-slot command response table (CRPB), 8 bytes each in size
730 pp->crpb_dma = mem_dma;
732 mem_dma += MV_CRPB_Q_SZ;
735 * Table of scatter-gather descriptors (ePRD), 16 bytes each
738 pp->sg_tbl_dma = mem_dma;
740 writelfl(EDMA_CFG_Q_DEPTH | EDMA_CFG_RD_BRST_EXT |
741 EDMA_CFG_WR_BUFF_LEN, port_mmio + EDMA_CFG_OFS);
743 writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI_OFS);
744 writelfl(pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK,
745 port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
747 writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
748 writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
750 writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS);
751 writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK,
752 port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
754 pp->req_producer = pp->rsp_consumer = 0;
756 /* Don't turn on EDMA here...do it before DMA commands only. Else
757 * we'll be unable to send non-data, PIO, etc due to restricted access
760 ap->private_data = pp;
764 mv_priv_free(pp, dev);
772 * mv_port_stop - Port specific cleanup/stop routine.
773 * @ap: ATA channel to manipulate
775 * Stop DMA, cleanup port memory.
778 * This routine uses the host_set lock to protect the DMA stop.
780 static void mv_port_stop(struct ata_port *ap)
782 struct device *dev = ap->host_set->dev;
783 struct mv_port_priv *pp = ap->private_data;
786 spin_lock_irqsave(&ap->host_set->lock, flags);
788 spin_unlock_irqrestore(&ap->host_set->lock, flags);
790 ap->private_data = NULL;
791 ata_pad_free(ap, dev);
792 mv_priv_free(pp, dev);
797 * mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries
798 * @qc: queued command whose SG list to source from
800 * Populate the SG list and mark the last entry.
803 * Inherited from caller.
805 static void mv_fill_sg(struct ata_queued_cmd *qc)
807 struct mv_port_priv *pp = qc->ap->private_data;
809 struct scatterlist *sg;
811 ata_for_each_sg(sg, qc) {
815 addr = sg_dma_address(sg);
816 sg_len = sg_dma_len(sg);
818 pp->sg_tbl[i].addr = cpu_to_le32(addr & 0xffffffff);
819 pp->sg_tbl[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
820 assert(0 == (sg_len & ~MV_DMA_BOUNDARY));
821 pp->sg_tbl[i].flags_size = cpu_to_le32(sg_len);
822 if (ata_sg_is_last(sg, qc))
823 pp->sg_tbl[i].flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
829 static inline unsigned mv_inc_q_index(unsigned *index)
831 *index = (*index + 1) & MV_MAX_Q_DEPTH_MASK;
835 static inline void mv_crqb_pack_cmd(u16 *cmdw, u8 data, u8 addr, unsigned last)
837 *cmdw = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS |
838 (last ? CRQB_CMD_LAST : 0);
842 * mv_qc_prep - Host specific command preparation.
843 * @qc: queued command to prepare
845 * This routine simply redirects to the general purpose routine
846 * if command is not DMA. Else, it handles prep of the CRQB
847 * (command request block), does some sanity checking, and calls
848 * the SG load routine.
851 * Inherited from caller.
853 static void mv_qc_prep(struct ata_queued_cmd *qc)
855 struct ata_port *ap = qc->ap;
856 struct mv_port_priv *pp = ap->private_data;
858 struct ata_taskfile *tf;
861 if (ATA_PROT_DMA != qc->tf.protocol) {
865 /* the req producer index should be the same as we remember it */
866 assert(((readl(mv_ap_base(qc->ap) + EDMA_REQ_Q_IN_PTR_OFS) >>
867 EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
870 /* Fill in command request block
872 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
873 flags |= CRQB_FLAG_READ;
875 assert(MV_MAX_Q_DEPTH > qc->tag);
876 flags |= qc->tag << CRQB_TAG_SHIFT;
878 pp->crqb[pp->req_producer].sg_addr =
879 cpu_to_le32(pp->sg_tbl_dma & 0xffffffff);
880 pp->crqb[pp->req_producer].sg_addr_hi =
881 cpu_to_le32((pp->sg_tbl_dma >> 16) >> 16);
882 pp->crqb[pp->req_producer].ctrl_flags = cpu_to_le16(flags);
884 cw = &pp->crqb[pp->req_producer].ata_cmd[0];
887 /* Sadly, the CRQB cannot accomodate all registers--there are
888 * only 11 bytes...so we must pick and choose required
889 * registers based on the command. So, we drop feature and
890 * hob_feature for [RW] DMA commands, but they are needed for
891 * NCQ. NCQ will drop hob_nsect.
893 switch (tf->command) {
895 case ATA_CMD_READ_EXT:
897 case ATA_CMD_WRITE_EXT:
898 mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0);
900 #ifdef LIBATA_NCQ /* FIXME: remove this line when NCQ added */
901 case ATA_CMD_FPDMA_READ:
902 case ATA_CMD_FPDMA_WRITE:
903 mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0);
904 mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0);
906 #endif /* FIXME: remove this line when NCQ added */
908 /* The only other commands EDMA supports in non-queued and
909 * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none
910 * of which are defined/used by Linux. If we get here, this
913 * FIXME: modify libata to give qc_prep a return value and
919 mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0);
920 mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0);
921 mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0);
922 mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0);
923 mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0);
924 mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0);
925 mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0);
926 mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0);
927 mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1); /* last */
929 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) {
936 * mv_qc_issue - Initiate a command to the host
937 * @qc: queued command to start
939 * This routine simply redirects to the general purpose routine
940 * if command is not DMA. Else, it sanity checks our local
941 * caches of the request producer/consumer indices then enables
942 * DMA and bumps the request producer index.
945 * Inherited from caller.
947 static int mv_qc_issue(struct ata_queued_cmd *qc)
949 void __iomem *port_mmio = mv_ap_base(qc->ap);
950 struct mv_port_priv *pp = qc->ap->private_data;
953 if (ATA_PROT_DMA != qc->tf.protocol) {
954 /* We're about to send a non-EDMA capable command to the
955 * port. Turn off EDMA so there won't be problems accessing
956 * shadow block, etc registers.
959 return ata_qc_issue_prot(qc);
962 in_ptr = readl(port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
964 /* the req producer index should be the same as we remember it */
965 assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
967 /* until we do queuing, the queue should be empty at this point */
968 assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
969 ((readl(port_mmio + EDMA_REQ_Q_OUT_PTR_OFS) >>
970 EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK));
972 mv_inc_q_index(&pp->req_producer); /* now incr producer index */
974 mv_start_dma(port_mmio, pp);
976 /* and write the request in pointer to kick the EDMA to life */
977 in_ptr &= EDMA_REQ_Q_BASE_LO_MASK;
978 in_ptr |= pp->req_producer << EDMA_REQ_Q_PTR_SHIFT;
979 writelfl(in_ptr, port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
985 * mv_get_crpb_status - get status from most recently completed cmd
986 * @ap: ATA channel to manipulate
988 * This routine is for use when the port is in DMA mode, when it
989 * will be using the CRPB (command response block) method of
990 * returning command completion information. We assert indices
991 * are good, grab status, and bump the response consumer index to
992 * prove that we're up to date.
995 * Inherited from caller.
997 static u8 mv_get_crpb_status(struct ata_port *ap)
999 void __iomem *port_mmio = mv_ap_base(ap);
1000 struct mv_port_priv *pp = ap->private_data;
1003 out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
1005 /* the response consumer index should be the same as we remember it */
1006 assert(((out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
1009 /* increment our consumer index... */
1010 pp->rsp_consumer = mv_inc_q_index(&pp->rsp_consumer);
1012 /* and, until we do NCQ, there should only be 1 CRPB waiting */
1013 assert(((readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) >>
1014 EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
1017 /* write out our inc'd consumer index so EDMA knows we're caught up */
1018 out_ptr &= EDMA_RSP_Q_BASE_LO_MASK;
1019 out_ptr |= pp->rsp_consumer << EDMA_RSP_Q_PTR_SHIFT;
1020 writelfl(out_ptr, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
1022 /* Return ATA status register for completed CRPB */
1023 return (pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT);
1027 * mv_err_intr - Handle error interrupts on the port
1028 * @ap: ATA channel to manipulate
1030 * In most cases, just clear the interrupt and move on. However,
1031 * some cases require an eDMA reset, which is done right before
1032 * the COMRESET in mv_phy_reset(). The SERR case requires a
1033 * clear of pending errors in the SATA SERROR register. Finally,
1034 * if the port disabled DMA, update our cached copy to match.
1037 * Inherited from caller.
1039 static void mv_err_intr(struct ata_port *ap)
1041 void __iomem *port_mmio = mv_ap_base(ap);
1042 u32 edma_err_cause, serr = 0;
1044 edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1046 if (EDMA_ERR_SERR & edma_err_cause) {
1047 serr = scr_read(ap, SCR_ERROR);
1048 scr_write_flush(ap, SCR_ERROR, serr);
1050 if (EDMA_ERR_SELF_DIS & edma_err_cause) {
1051 struct mv_port_priv *pp = ap->private_data;
1052 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1054 DPRINTK(KERN_ERR "ata%u: port error; EDMA err cause: 0x%08x "
1055 "SERR: 0x%08x\n", ap->id, edma_err_cause, serr);
1057 /* Clear EDMA now that SERR cleanup done */
1058 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1060 /* check for fatal here and recover if needed */
1061 if (EDMA_ERR_FATAL & edma_err_cause) {
1067 * mv_host_intr - Handle all interrupts on the given host controller
1068 * @host_set: host specific structure
1069 * @relevant: port error bits relevant to this host controller
1070 * @hc: which host controller we're to look at
1072 * Read then write clear the HC interrupt status then walk each
1073 * port connected to the HC and see if it needs servicing. Port
1074 * success ints are reported in the HC interrupt status reg, the
1075 * port error ints are reported in the higher level main
1076 * interrupt status register and thus are passed in via the
1077 * 'relevant' argument.
1080 * Inherited from caller.
1082 static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
1085 void __iomem *mmio = host_set->mmio_base;
1086 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
1087 struct ata_port *ap;
1088 struct ata_queued_cmd *qc;
1090 int shift, port, port0, hard_port, handled;
1091 unsigned int err_mask;
1097 port0 = MV_PORTS_PER_HC;
1100 /* we'll need the HC success int register in most cases */
1101 hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
1103 writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS);
1106 VPRINTK("ENTER, hc%u relevant=0x%08x HC IRQ cause=0x%08x\n",
1107 hc,relevant,hc_irq_cause);
1109 for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) {
1110 ap = host_set->ports[port];
1111 hard_port = port & MV_PORT_MASK; /* range 0-3 */
1112 handled = 0; /* ensure ata_status is set if handled++ */
1114 if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) {
1115 /* new CRPB on the queue; just one at a time until NCQ
1117 ata_status = mv_get_crpb_status(ap);
1119 } else if ((DEV_IRQ << hard_port) & hc_irq_cause) {
1120 /* received ATA IRQ; read the status reg to clear INTRQ
1122 ata_status = readb((void __iomem *)
1123 ap->ioaddr.status_addr);
1127 err_mask = ac_err_mask(ata_status);
1129 shift = port << 1; /* (port * 2) */
1130 if (port >= MV_PORTS_PER_HC) {
1131 shift++; /* skip bit 8 in the HC Main IRQ reg */
1133 if ((PORT0_ERR << shift) & relevant) {
1135 err_mask |= AC_ERR_OTHER;
1139 if (handled && ap) {
1140 qc = ata_qc_from_tag(ap, ap->active_tag);
1142 VPRINTK("port %u IRQ found for qc, "
1143 "ata_status 0x%x\n", port,ata_status);
1144 /* mark qc status appropriately */
1145 ata_qc_complete(qc, err_mask);
1155 * @dev_instance: private data; in this case the host structure
1158 * Read the read only register to determine if any host
1159 * controllers have pending interrupts. If so, call lower level
1160 * routine to handle. Also check for PCI errors which are only
1164 * This routine holds the host_set lock while processing pending
1167 static irqreturn_t mv_interrupt(int irq, void *dev_instance,
1168 struct pt_regs *regs)
1170 struct ata_host_set *host_set = dev_instance;
1171 unsigned int hc, handled = 0, n_hcs;
1172 void __iomem *mmio = host_set->mmio_base;
1175 irq_stat = readl(mmio + HC_MAIN_IRQ_CAUSE_OFS);
1177 /* check the cases where we either have nothing pending or have read
1178 * a bogus register value which can indicate HW removal or PCI fault
1180 if (!irq_stat || (0xffffffffU == irq_stat)) {
1184 n_hcs = mv_get_hc_count(host_set->ports[0]->flags);
1185 spin_lock(&host_set->lock);
1187 for (hc = 0; hc < n_hcs; hc++) {
1188 u32 relevant = irq_stat & (HC0_IRQ_PEND << (hc * HC_SHIFT));
1190 mv_host_intr(host_set, relevant, hc);
1194 if (PCI_ERR & irq_stat) {
1195 printk(KERN_ERR DRV_NAME ": PCI ERROR; PCI IRQ cause=0x%08x\n",
1196 readl(mmio + PCI_IRQ_CAUSE_OFS));
1198 DPRINTK("All regs @ PCI error\n");
1199 mv_dump_all_regs(mmio, -1, to_pci_dev(host_set->dev));
1201 writelfl(0, mmio + PCI_IRQ_CAUSE_OFS);
1204 spin_unlock(&host_set->lock);
1206 return IRQ_RETVAL(handled);
1210 * mv_phy_reset - Perform eDMA reset followed by COMRESET
1211 * @ap: ATA channel to manipulate
1213 * Part of this is taken from __sata_phy_reset and modified to
1214 * not sleep since this routine gets called from interrupt level.
1217 * Inherited from caller. This is coded to safe to call at
1218 * interrupt level, i.e. it does not sleep.
1220 static void mv_phy_reset(struct ata_port *ap)
1222 struct mv_port_priv *pp = ap->private_data;
1223 void __iomem *port_mmio = mv_ap_base(ap);
1224 struct ata_taskfile tf;
1225 struct ata_device *dev = &ap->device[0];
1226 unsigned long timeout;
1228 VPRINTK("ENTER, port %u, mmio 0x%p\n", ap->port_no, port_mmio);
1232 writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS);
1233 udelay(25); /* allow reset propagation */
1235 /* Spec never mentions clearing the bit. Marvell's driver does
1236 * clear the bit, however.
1238 writelfl(0, port_mmio + EDMA_CMD_OFS);
1240 DPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x "
1241 "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
1242 mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
1244 /* proceed to init communications via the scr_control reg */
1245 scr_write_flush(ap, SCR_CONTROL, 0x301);
1247 scr_write_flush(ap, SCR_CONTROL, 0x300);
1248 timeout = jiffies + (HZ * 1);
1251 if ((scr_read(ap, SCR_STATUS) & 0xf) != 1)
1253 } while (time_before(jiffies, timeout));
1255 mv_scr_write(ap, SCR_ERROR, mv_scr_read(ap, SCR_ERROR));
1257 DPRINTK("S-regs after PHY wake: SStat 0x%08x SErr 0x%08x "
1258 "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
1259 mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
1261 if (sata_dev_present(ap)) {
1264 printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n",
1265 ap->id, scr_read(ap, SCR_STATUS));
1266 ata_port_disable(ap);
1269 ap->cbl = ATA_CBL_SATA;
1271 tf.lbah = readb((void __iomem *) ap->ioaddr.lbah_addr);
1272 tf.lbam = readb((void __iomem *) ap->ioaddr.lbam_addr);
1273 tf.lbal = readb((void __iomem *) ap->ioaddr.lbal_addr);
1274 tf.nsect = readb((void __iomem *) ap->ioaddr.nsect_addr);
1276 dev->class = ata_dev_classify(&tf);
1277 if (!ata_dev_present(dev)) {
1278 VPRINTK("Port disabled post-sig: No device present.\n");
1279 ata_port_disable(ap);
1282 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1284 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1290 * mv_eng_timeout - Routine called by libata when SCSI times out I/O
1291 * @ap: ATA channel to manipulate
1293 * Intent is to clear all pending error conditions, reset the
1294 * chip/bus, fail the command, and move on.
1297 * This routine holds the host_set lock while failing the command.
1299 static void mv_eng_timeout(struct ata_port *ap)
1301 struct ata_queued_cmd *qc;
1302 unsigned long flags;
1304 printk(KERN_ERR "ata%u: Entering mv_eng_timeout\n",ap->id);
1305 DPRINTK("All regs @ start of eng_timeout\n");
1306 mv_dump_all_regs(ap->host_set->mmio_base, ap->port_no,
1307 to_pci_dev(ap->host_set->dev));
1309 qc = ata_qc_from_tag(ap, ap->active_tag);
1310 printk(KERN_ERR "mmio_base %p ap %p qc %p scsi_cmnd %p &cmnd %p\n",
1311 ap->host_set->mmio_base, ap, qc, qc->scsicmd,
1312 &qc->scsicmd->cmnd);
1318 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
1321 /* hack alert! We cannot use the supplied completion
1322 * function from inside the ->eh_strategy_handler() thread.
1323 * libata is the only user of ->eh_strategy_handler() in
1324 * any kernel, so the default scsi_done() assumes it is
1325 * not being called from the SCSI EH.
1327 spin_lock_irqsave(&ap->host_set->lock, flags);
1328 qc->scsidone = scsi_finish_command;
1329 ata_qc_complete(qc, AC_ERR_OTHER);
1330 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1335 * mv_port_init - Perform some early initialization on a single port.
1336 * @port: libata data structure storing shadow register addresses
1337 * @port_mmio: base address of the port
1339 * Initialize shadow register mmio addresses, clear outstanding
1340 * interrupts on the port, and unmask interrupts for the future
1341 * start of the port.
1344 * Inherited from caller.
1346 static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio)
1348 unsigned long shd_base = (unsigned long) port_mmio + SHD_BLK_OFS;
1351 /* PIO related setup
1353 port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA);
1355 port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR);
1356 port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT);
1357 port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL);
1358 port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM);
1359 port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH);
1360 port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE);
1362 port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS);
1363 /* special case: control/altstatus doesn't have ATA_REG_ address */
1364 port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST_OFS;
1367 port->cmd_addr = port->bmdma_addr = port->scr_addr = 0;
1369 /* Clear any currently outstanding port interrupt conditions */
1370 serr_ofs = mv_scr_offset(SCR_ERROR);
1371 writelfl(readl(port_mmio + serr_ofs), port_mmio + serr_ofs);
1372 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1374 /* unmask all EDMA error interrupts */
1375 writelfl(~0, port_mmio + EDMA_ERR_IRQ_MASK_OFS);
1377 VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n",
1378 readl(port_mmio + EDMA_CFG_OFS),
1379 readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS),
1380 readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS));
1384 * mv_host_init - Perform some early initialization of the host.
1385 * @probe_ent: early data struct representing the host
1387 * If possible, do an early global reset of the host. Then do
1388 * our port init and clear/unmask all/relevant host interrupts.
1391 * Inherited from caller.
1393 static int mv_host_init(struct ata_probe_ent *probe_ent)
1395 int rc = 0, n_hc, port, hc;
1396 void __iomem *mmio = probe_ent->mmio_base;
1397 void __iomem *port_mmio;
1399 if ((MV_FLAG_GLBL_SFT_RST & probe_ent->host_flags) &&
1400 mv_global_soft_reset(probe_ent->mmio_base)) {
1405 n_hc = mv_get_hc_count(probe_ent->host_flags);
1406 probe_ent->n_ports = MV_PORTS_PER_HC * n_hc;
1408 for (port = 0; port < probe_ent->n_ports; port++) {
1409 port_mmio = mv_port_base(mmio, port);
1410 mv_port_init(&probe_ent->port[port], port_mmio);
1413 for (hc = 0; hc < n_hc; hc++) {
1414 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
1416 VPRINTK("HC%i: HC config=0x%08x HC IRQ cause "
1417 "(before clear)=0x%08x\n", hc,
1418 readl(hc_mmio + HC_CFG_OFS),
1419 readl(hc_mmio + HC_IRQ_CAUSE_OFS));
1421 /* Clear any currently outstanding hc interrupt conditions */
1422 writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS);
1425 /* Clear any currently outstanding host interrupt conditions */
1426 writelfl(0, mmio + PCI_IRQ_CAUSE_OFS);
1428 /* and unmask interrupt generation for host regs */
1429 writelfl(PCI_UNMASK_ALL_IRQS, mmio + PCI_IRQ_MASK_OFS);
1430 writelfl(~HC_MAIN_MASKED_IRQS, mmio + HC_MAIN_IRQ_MASK_OFS);
1432 VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x "
1433 "PCI int cause/mask=0x%08x/0x%08x\n",
1434 readl(mmio + HC_MAIN_IRQ_CAUSE_OFS),
1435 readl(mmio + HC_MAIN_IRQ_MASK_OFS),
1436 readl(mmio + PCI_IRQ_CAUSE_OFS),
1437 readl(mmio + PCI_IRQ_MASK_OFS));
1443 * mv_print_info - Dump key info to kernel log for perusal.
1444 * @probe_ent: early data struct representing the host
1446 * FIXME: complete this.
1449 * Inherited from caller.
1451 static void mv_print_info(struct ata_probe_ent *probe_ent)
1453 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1454 struct mv_host_priv *hpriv = probe_ent->private_data;
1458 /* Use this to determine the HW stepping of the chip so we know
1459 * what errata to workaround
1461 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
1463 pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc);
1466 else if (scc == 0x01)
1471 dev_printk(KERN_INFO, &pdev->dev,
1472 "%u slots %u ports %s mode IRQ via %s\n",
1473 (unsigned)MV_MAX_Q_DEPTH, probe_ent->n_ports,
1474 scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx");
1478 * mv_init_one - handle a positive probe of a Marvell host
1479 * @pdev: PCI device found
1480 * @ent: PCI device ID entry for the matched host
1483 * Inherited from caller.
1485 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1487 static int printed_version = 0;
1488 struct ata_probe_ent *probe_ent = NULL;
1489 struct mv_host_priv *hpriv;
1490 unsigned int board_idx = (unsigned int)ent->driver_data;
1491 void __iomem *mmio_base;
1492 int pci_dev_busy = 0, rc;
1494 if (!printed_version++)
1495 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
1497 rc = pci_enable_device(pdev);
1502 rc = pci_request_regions(pdev, DRV_NAME);
1508 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1509 if (probe_ent == NULL) {
1511 goto err_out_regions;
1514 memset(probe_ent, 0, sizeof(*probe_ent));
1515 probe_ent->dev = pci_dev_to_dev(pdev);
1516 INIT_LIST_HEAD(&probe_ent->node);
1518 mmio_base = pci_iomap(pdev, MV_PRIMARY_BAR, 0);
1519 if (mmio_base == NULL) {
1521 goto err_out_free_ent;
1524 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1527 goto err_out_iounmap;
1529 memset(hpriv, 0, sizeof(*hpriv));
1531 probe_ent->sht = mv_port_info[board_idx].sht;
1532 probe_ent->host_flags = mv_port_info[board_idx].host_flags;
1533 probe_ent->pio_mask = mv_port_info[board_idx].pio_mask;
1534 probe_ent->udma_mask = mv_port_info[board_idx].udma_mask;
1535 probe_ent->port_ops = mv_port_info[board_idx].port_ops;
1537 probe_ent->irq = pdev->irq;
1538 probe_ent->irq_flags = SA_SHIRQ;
1539 probe_ent->mmio_base = mmio_base;
1540 probe_ent->private_data = hpriv;
1542 /* initialize adapter */
1543 rc = mv_host_init(probe_ent);
1548 /* Enable interrupts */
1549 if (pci_enable_msi(pdev) == 0) {
1550 hpriv->hp_flags |= MV_HP_FLAG_MSI;
1555 mv_dump_pci_cfg(pdev, 0x68);
1556 mv_print_info(probe_ent);
1558 if (ata_device_add(probe_ent) == 0) {
1559 rc = -ENODEV; /* No devices discovered */
1560 goto err_out_dev_add;
1567 if (MV_HP_FLAG_MSI & hpriv->hp_flags) {
1568 pci_disable_msi(pdev);
1575 pci_iounmap(pdev, mmio_base);
1579 pci_release_regions(pdev);
1581 if (!pci_dev_busy) {
1582 pci_disable_device(pdev);
1588 static int __init mv_init(void)
1590 return pci_module_init(&mv_pci_driver);
1593 static void __exit mv_exit(void)
1595 pci_unregister_driver(&mv_pci_driver);
1598 MODULE_AUTHOR("Brett Russ");
1599 MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers");
1600 MODULE_LICENSE("GPL");
1601 MODULE_DEVICE_TABLE(pci, mv_pci_tbl);
1602 MODULE_VERSION(DRV_VERSION);
1604 module_init(mv_init);
1605 module_exit(mv_exit);