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,
53 MV_GPIO_PORT_CTL = 0x104f0,
54 MV_RESET_CFG = 0x180d8,
56 MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ,
57 MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ,
58 MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */
59 MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ,
61 MV_USE_Q_DEPTH = ATA_DEF_QUEUE,
64 MV_MAX_Q_DEPTH_MASK = MV_MAX_Q_DEPTH - 1,
66 /* CRQB needs alignment on a 1KB boundary. Size == 1KB
67 * CRPB needs alignment on a 256B boundary. Size == 256B
68 * SG count of 176 leads to MV_PORT_PRIV_DMA_SZ == 4KB
69 * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B
71 MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH),
72 MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH),
74 MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT),
75 MV_PORT_PRIV_DMA_SZ = (MV_CRQB_Q_SZ + MV_CRPB_Q_SZ + MV_SG_TBL_SZ),
78 /* == (port / MV_PORTS_PER_HC) to determine HC from 0-7 port */
80 /* == (port % MV_PORTS_PER_HC) to determine hard port from 0-7 port */
84 MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */
85 MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */
86 MV_FLAG_GLBL_SFT_RST = (1 << 28), /* Global Soft Reset support */
87 MV_COMMON_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
88 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO),
89 MV_6XXX_FLAGS = (MV_FLAG_IRQ_COALESCE |
90 MV_FLAG_GLBL_SFT_RST),
97 CRQB_FLAG_READ = (1 << 0),
99 CRQB_CMD_ADDR_SHIFT = 8,
100 CRQB_CMD_CS = (0x2 << 11),
101 CRQB_CMD_LAST = (1 << 15),
103 CRPB_FLAG_STATUS_SHIFT = 8,
105 EPRD_FLAG_END_OF_TBL = (1 << 31),
107 /* PCI interface registers */
109 PCI_COMMAND_OFS = 0xc00,
111 PCI_MAIN_CMD_STS_OFS = 0xd30,
112 STOP_PCI_MASTER = (1 << 2),
113 PCI_MASTER_EMPTY = (1 << 3),
114 GLOB_SFT_RST = (1 << 4),
116 PCI_IRQ_CAUSE_OFS = 0x1d58,
117 PCI_IRQ_MASK_OFS = 0x1d5c,
118 PCI_UNMASK_ALL_IRQS = 0x7fffff, /* bits 22-0 */
120 HC_MAIN_IRQ_CAUSE_OFS = 0x1d60,
121 HC_MAIN_IRQ_MASK_OFS = 0x1d64,
122 PORT0_ERR = (1 << 0), /* shift by port # */
123 PORT0_DONE = (1 << 1), /* shift by port # */
124 HC0_IRQ_PEND = 0x1ff, /* bits 0-8 = HC0's ports */
125 HC_SHIFT = 9, /* bits 9-17 = HC1's ports */
127 TRAN_LO_DONE = (1 << 19), /* 6xxx: IRQ coalescing */
128 TRAN_HI_DONE = (1 << 20), /* 6xxx: IRQ coalescing */
129 PORTS_0_7_COAL_DONE = (1 << 21), /* 6xxx: IRQ coalescing */
130 GPIO_INT = (1 << 22),
131 SELF_INT = (1 << 23),
132 TWSI_INT = (1 << 24),
133 HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */
134 HC_MAIN_MASKED_IRQS = (TRAN_LO_DONE | TRAN_HI_DONE |
135 PORTS_0_7_COAL_DONE | GPIO_INT | TWSI_INT |
138 /* SATAHC registers */
141 HC_IRQ_CAUSE_OFS = 0x14,
142 CRPB_DMA_DONE = (1 << 0), /* shift by port # */
143 HC_IRQ_COAL = (1 << 4), /* IRQ coalescing */
144 DEV_IRQ = (1 << 8), /* shift by port # */
146 /* Shadow block registers */
148 SHD_CTL_AST_OFS = 0x20, /* ofs from SHD_BLK_OFS */
151 SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */
152 SATA_ACTIVE_OFS = 0x350,
155 SATA_INTERFACE_CTL = 0x050,
157 MV_M2_PREAMP_MASK = 0x7e0,
161 EDMA_CFG_Q_DEPTH = 0, /* queueing disabled */
162 EDMA_CFG_NCQ = (1 << 5),
163 EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */
164 EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */
165 EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */
167 EDMA_ERR_IRQ_CAUSE_OFS = 0x8,
168 EDMA_ERR_IRQ_MASK_OFS = 0xc,
169 EDMA_ERR_D_PAR = (1 << 0),
170 EDMA_ERR_PRD_PAR = (1 << 1),
171 EDMA_ERR_DEV = (1 << 2),
172 EDMA_ERR_DEV_DCON = (1 << 3),
173 EDMA_ERR_DEV_CON = (1 << 4),
174 EDMA_ERR_SERR = (1 << 5),
175 EDMA_ERR_SELF_DIS = (1 << 7),
176 EDMA_ERR_BIST_ASYNC = (1 << 8),
177 EDMA_ERR_CRBQ_PAR = (1 << 9),
178 EDMA_ERR_CRPB_PAR = (1 << 10),
179 EDMA_ERR_INTRL_PAR = (1 << 11),
180 EDMA_ERR_IORDY = (1 << 12),
181 EDMA_ERR_LNK_CTRL_RX = (0xf << 13),
182 EDMA_ERR_LNK_CTRL_RX_2 = (1 << 15),
183 EDMA_ERR_LNK_DATA_RX = (0xf << 17),
184 EDMA_ERR_LNK_CTRL_TX = (0x1f << 21),
185 EDMA_ERR_LNK_DATA_TX = (0x1f << 26),
186 EDMA_ERR_TRANS_PROTO = (1 << 31),
187 EDMA_ERR_FATAL = (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
188 EDMA_ERR_DEV_DCON | EDMA_ERR_CRBQ_PAR |
189 EDMA_ERR_CRPB_PAR | EDMA_ERR_INTRL_PAR |
190 EDMA_ERR_IORDY | EDMA_ERR_LNK_CTRL_RX_2 |
191 EDMA_ERR_LNK_DATA_RX |
192 EDMA_ERR_LNK_DATA_TX |
193 EDMA_ERR_TRANS_PROTO),
195 EDMA_REQ_Q_BASE_HI_OFS = 0x10,
196 EDMA_REQ_Q_IN_PTR_OFS = 0x14, /* also contains BASE_LO */
198 EDMA_REQ_Q_OUT_PTR_OFS = 0x18,
199 EDMA_REQ_Q_PTR_SHIFT = 5,
201 EDMA_RSP_Q_BASE_HI_OFS = 0x1c,
202 EDMA_RSP_Q_IN_PTR_OFS = 0x20,
203 EDMA_RSP_Q_OUT_PTR_OFS = 0x24, /* also contains BASE_LO */
204 EDMA_RSP_Q_PTR_SHIFT = 3,
212 EDMA_NO_SNOOP = (1 << 6),
214 /* Host private flags (hp_flags) */
215 MV_HP_FLAG_MSI = (1 << 0),
216 MV_HP_ERRATA_60X1A1 = (1 << 1),
217 MV_HP_ERRATA_60X1B0 = (1 << 2),
218 MV_HP_ERRATA_50XXB0 = (1 << 3),
219 MV_HP_ERRATA_50XXB1 = (1 << 4),
220 MV_HP_ERRATA_50XXB2 = (1 << 5),
221 MV_HP_50XX = (1 << 6),
223 /* Port private flags (pp_flags) */
224 MV_PP_FLAG_EDMA_EN = (1 << 0),
225 MV_PP_FLAG_EDMA_DS_ACT = (1 << 1),
228 #define IS_50XX(hpriv) ((hpriv)->hp_flags & MV_HP_50XX)
229 #define IS_60XX(hpriv) (((hpriv)->hp_flags & MV_HP_50XX) == 0)
232 /* Our DMA boundary is determined by an ePRD being unable to handle
233 * anything larger than 64KB
235 MV_DMA_BOUNDARY = 0xffffU,
237 EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U,
239 EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U,
242 /* Command ReQuest Block: 32B */
250 /* Command ResPonse Block: 8B */
257 /* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */
265 struct mv_port_priv {
266 struct mv_crqb *crqb;
268 struct mv_crpb *crpb;
270 struct mv_sg *sg_tbl;
271 dma_addr_t sg_tbl_dma;
273 unsigned req_producer; /* cp of req_in_ptr */
274 unsigned rsp_consumer; /* cp of rsp_out_ptr */
278 struct mv_port_signal {
283 struct mv_host_priv {
285 struct mv_port_signal signal[8];
288 static void mv_irq_clear(struct ata_port *ap);
289 static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in);
290 static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
291 static void mv_phy_reset(struct ata_port *ap);
292 static void mv_host_stop(struct ata_host_set *host_set);
293 static int mv_port_start(struct ata_port *ap);
294 static void mv_port_stop(struct ata_port *ap);
295 static void mv_qc_prep(struct ata_queued_cmd *qc);
296 static int mv_qc_issue(struct ata_queued_cmd *qc);
297 static irqreturn_t mv_interrupt(int irq, void *dev_instance,
298 struct pt_regs *regs);
299 static void mv_eng_timeout(struct ata_port *ap);
300 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
302 static struct scsi_host_template mv_sht = {
303 .module = THIS_MODULE,
305 .ioctl = ata_scsi_ioctl,
306 .queuecommand = ata_scsi_queuecmd,
307 .eh_strategy_handler = ata_scsi_error,
308 .can_queue = MV_USE_Q_DEPTH,
309 .this_id = ATA_SHT_THIS_ID,
310 .sg_tablesize = MV_MAX_SG_CT,
311 .max_sectors = ATA_MAX_SECTORS,
312 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
313 .emulated = ATA_SHT_EMULATED,
314 .use_clustering = ATA_SHT_USE_CLUSTERING,
315 .proc_name = DRV_NAME,
316 .dma_boundary = MV_DMA_BOUNDARY,
317 .slave_configure = ata_scsi_slave_config,
318 .bios_param = ata_std_bios_param,
322 static const struct ata_port_operations mv_ops = {
323 .port_disable = ata_port_disable,
325 .tf_load = ata_tf_load,
326 .tf_read = ata_tf_read,
327 .check_status = ata_check_status,
328 .exec_command = ata_exec_command,
329 .dev_select = ata_std_dev_select,
331 .phy_reset = mv_phy_reset,
333 .qc_prep = mv_qc_prep,
334 .qc_issue = mv_qc_issue,
336 .eng_timeout = mv_eng_timeout,
338 .irq_handler = mv_interrupt,
339 .irq_clear = mv_irq_clear,
341 .scr_read = mv_scr_read,
342 .scr_write = mv_scr_write,
344 .port_start = mv_port_start,
345 .port_stop = mv_port_stop,
346 .host_stop = mv_host_stop,
349 static struct ata_port_info mv_port_info[] = {
352 .host_flags = MV_COMMON_FLAGS,
353 .pio_mask = 0x1f, /* pio0-4 */
354 .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */
359 .host_flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC),
360 .pio_mask = 0x1f, /* pio0-4 */
361 .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */
366 .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
367 .pio_mask = 0x1f, /* pio0-4 */
368 .udma_mask = 0x7f, /* udma0-6 */
373 .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS |
375 .pio_mask = 0x1f, /* pio0-4 */
376 .udma_mask = 0x7f, /* udma0-6 */
381 static const struct pci_device_id mv_pci_tbl[] = {
382 #if 0 /* unusably broken right now */
383 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5040), 0, 0, chip_504x},
384 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5041), 0, 0, chip_504x},
385 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5080), 0, 0, chip_508x},
386 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5081), 0, 0, chip_508x},
389 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6040), 0, 0, chip_604x},
390 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6041), 0, 0, chip_604x},
391 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6080), 0, 0, chip_608x},
392 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6081), 0, 0, chip_608x},
394 {PCI_DEVICE(PCI_VENDOR_ID_ADAPTEC2, 0x0241), 0, 0, chip_604x},
395 {} /* terminate list */
398 static struct pci_driver mv_pci_driver = {
400 .id_table = mv_pci_tbl,
401 .probe = mv_init_one,
402 .remove = ata_pci_remove_one,
409 static inline void writelfl(unsigned long data, void __iomem *addr)
412 (void) readl(addr); /* flush to avoid PCI posted write */
415 static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc)
417 return (base + MV_SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ));
420 static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port)
422 return (mv_hc_base(base, port >> MV_PORT_HC_SHIFT) +
423 MV_SATAHC_ARBTR_REG_SZ +
424 ((port & MV_PORT_MASK) * MV_PORT_REG_SZ));
427 static inline void __iomem *mv_ap_base(struct ata_port *ap)
429 return mv_port_base(ap->host_set->mmio_base, ap->port_no);
432 static inline int mv_get_hc_count(unsigned long host_flags)
434 return ((host_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
437 static void mv_irq_clear(struct ata_port *ap)
442 * mv_start_dma - Enable eDMA engine
443 * @base: port base address
444 * @pp: port private data
446 * Verify the local cache of the eDMA state is accurate with an
450 * Inherited from caller.
452 static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp)
454 if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) {
455 writelfl(EDMA_EN, base + EDMA_CMD_OFS);
456 pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
458 assert(EDMA_EN & readl(base + EDMA_CMD_OFS));
462 * mv_stop_dma - Disable eDMA engine
463 * @ap: ATA channel to manipulate
465 * Verify the local cache of the eDMA state is accurate with an
469 * Inherited from caller.
471 static void mv_stop_dma(struct ata_port *ap)
473 void __iomem *port_mmio = mv_ap_base(ap);
474 struct mv_port_priv *pp = ap->private_data;
478 if (MV_PP_FLAG_EDMA_EN & pp->pp_flags) {
479 /* Disable EDMA if active. The disable bit auto clears.
481 writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS);
482 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
484 assert(!(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)));
487 /* now properly wait for the eDMA to stop */
488 for (i = 1000; i > 0; i--) {
489 reg = readl(port_mmio + EDMA_CMD_OFS);
490 if (!(EDMA_EN & reg)) {
497 printk(KERN_ERR "ata%u: Unable to stop eDMA\n", ap->id);
498 /* FIXME: Consider doing a reset here to recover */
503 static void mv_dump_mem(void __iomem *start, unsigned bytes)
506 for (b = 0; b < bytes; ) {
507 DPRINTK("%p: ", start + b);
508 for (w = 0; b < bytes && w < 4; w++) {
509 printk("%08x ",readl(start + b));
517 static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes)
522 for (b = 0; b < bytes; ) {
523 DPRINTK("%02x: ", b);
524 for (w = 0; b < bytes && w < 4; w++) {
525 (void) pci_read_config_dword(pdev,b,&dw);
533 static void mv_dump_all_regs(void __iomem *mmio_base, int port,
534 struct pci_dev *pdev)
537 void __iomem *hc_base = mv_hc_base(mmio_base,
538 port >> MV_PORT_HC_SHIFT);
539 void __iomem *port_base;
540 int start_port, num_ports, p, start_hc, num_hcs, hc;
543 start_hc = start_port = 0;
544 num_ports = 8; /* shld be benign for 4 port devs */
547 start_hc = port >> MV_PORT_HC_SHIFT;
549 num_ports = num_hcs = 1;
551 DPRINTK("All registers for port(s) %u-%u:\n", start_port,
552 num_ports > 1 ? num_ports - 1 : start_port);
555 DPRINTK("PCI config space regs:\n");
556 mv_dump_pci_cfg(pdev, 0x68);
558 DPRINTK("PCI regs:\n");
559 mv_dump_mem(mmio_base+0xc00, 0x3c);
560 mv_dump_mem(mmio_base+0xd00, 0x34);
561 mv_dump_mem(mmio_base+0xf00, 0x4);
562 mv_dump_mem(mmio_base+0x1d00, 0x6c);
563 for (hc = start_hc; hc < start_hc + num_hcs; hc++) {
564 hc_base = mv_hc_base(mmio_base, port >> MV_PORT_HC_SHIFT);
565 DPRINTK("HC regs (HC %i):\n", hc);
566 mv_dump_mem(hc_base, 0x1c);
568 for (p = start_port; p < start_port + num_ports; p++) {
569 port_base = mv_port_base(mmio_base, p);
570 DPRINTK("EDMA regs (port %i):\n",p);
571 mv_dump_mem(port_base, 0x54);
572 DPRINTK("SATA regs (port %i):\n",p);
573 mv_dump_mem(port_base+0x300, 0x60);
578 static unsigned int mv_scr_offset(unsigned int sc_reg_in)
586 ofs = SATA_STATUS_OFS + (sc_reg_in * sizeof(u32));
589 ofs = SATA_ACTIVE_OFS; /* active is not with the others */
598 static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
600 unsigned int ofs = mv_scr_offset(sc_reg_in);
602 if (0xffffffffU != ofs) {
603 return readl(mv_ap_base(ap) + ofs);
609 static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
611 unsigned int ofs = mv_scr_offset(sc_reg_in);
613 if (0xffffffffU != ofs) {
614 writelfl(val, mv_ap_base(ap) + ofs);
619 * mv_global_soft_reset - Perform the 6xxx global soft reset
620 * @mmio_base: base address of the HBA
622 * This routine only applies to 6xxx parts.
625 * Inherited from caller.
627 static int mv_global_soft_reset(void __iomem *mmio_base)
629 void __iomem *reg = mmio_base + PCI_MAIN_CMD_STS_OFS;
633 /* Following procedure defined in PCI "main command and status
637 writel(t | STOP_PCI_MASTER, reg);
639 for (i = 0; i < 1000; i++) {
642 if (PCI_MASTER_EMPTY & t) {
646 if (!(PCI_MASTER_EMPTY & t)) {
647 printk(KERN_ERR DRV_NAME ": PCI master won't flush\n");
655 writel(t | GLOB_SFT_RST, reg);
658 } while (!(GLOB_SFT_RST & t) && (i-- > 0));
660 if (!(GLOB_SFT_RST & t)) {
661 printk(KERN_ERR DRV_NAME ": can't set global reset\n");
666 /* clear reset and *reenable the PCI master* (not mentioned in spec) */
669 writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg);
672 } while ((GLOB_SFT_RST & t) && (i-- > 0));
674 if (GLOB_SFT_RST & t) {
675 printk(KERN_ERR DRV_NAME ": can't clear global reset\n");
683 * mv_host_stop - Host specific cleanup/stop routine.
684 * @host_set: host data structure
686 * Disable ints, cleanup host memory, call general purpose
690 * Inherited from caller.
692 static void mv_host_stop(struct ata_host_set *host_set)
694 struct mv_host_priv *hpriv = host_set->private_data;
695 struct pci_dev *pdev = to_pci_dev(host_set->dev);
697 if (hpriv->hp_flags & MV_HP_FLAG_MSI) {
698 pci_disable_msi(pdev);
703 ata_host_stop(host_set);
706 static inline void mv_priv_free(struct mv_port_priv *pp, struct device *dev)
708 dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma);
712 * mv_port_start - Port specific init/start routine.
713 * @ap: ATA channel to manipulate
715 * Allocate and point to DMA memory, init port private memory,
719 * Inherited from caller.
721 static int mv_port_start(struct ata_port *ap)
723 struct device *dev = ap->host_set->dev;
724 struct mv_host_priv *hpriv = ap->host_set->private_data;
725 struct mv_port_priv *pp;
726 void __iomem *port_mmio = mv_ap_base(ap);
731 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
734 memset(pp, 0, sizeof(*pp));
736 mem = dma_alloc_coherent(dev, MV_PORT_PRIV_DMA_SZ, &mem_dma,
740 memset(mem, 0, MV_PORT_PRIV_DMA_SZ);
742 rc = ata_pad_alloc(ap, dev);
746 /* First item in chunk of DMA memory:
747 * 32-slot command request table (CRQB), 32 bytes each in size
750 pp->crqb_dma = mem_dma;
752 mem_dma += MV_CRQB_Q_SZ;
755 * 32-slot command response table (CRPB), 8 bytes each in size
758 pp->crpb_dma = mem_dma;
760 mem_dma += MV_CRPB_Q_SZ;
763 * Table of scatter-gather descriptors (ePRD), 16 bytes each
766 pp->sg_tbl_dma = mem_dma;
768 writelfl(EDMA_CFG_Q_DEPTH | EDMA_CFG_RD_BRST_EXT |
769 EDMA_CFG_WR_BUFF_LEN, port_mmio + EDMA_CFG_OFS);
771 writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI_OFS);
772 writelfl(pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK,
773 port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
775 writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
776 writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
778 writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS);
779 writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK,
780 port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
782 if (hpriv->hp_flags & MV_HP_ERRATA_60X1A1) {
785 new_tmp = tmp = readl(port_mmio + EDMA_ARB_CFG);
786 new_tmp &= ~EDMA_NO_SNOOP;
788 writel(new_tmp, port_mmio + EDMA_ARB_CFG);
791 pp->req_producer = pp->rsp_consumer = 0;
793 /* Don't turn on EDMA here...do it before DMA commands only. Else
794 * we'll be unable to send non-data, PIO, etc due to restricted access
797 ap->private_data = pp;
801 mv_priv_free(pp, dev);
809 * mv_port_stop - Port specific cleanup/stop routine.
810 * @ap: ATA channel to manipulate
812 * Stop DMA, cleanup port memory.
815 * This routine uses the host_set lock to protect the DMA stop.
817 static void mv_port_stop(struct ata_port *ap)
819 struct device *dev = ap->host_set->dev;
820 struct mv_port_priv *pp = ap->private_data;
823 spin_lock_irqsave(&ap->host_set->lock, flags);
825 spin_unlock_irqrestore(&ap->host_set->lock, flags);
827 ap->private_data = NULL;
828 ata_pad_free(ap, dev);
829 mv_priv_free(pp, dev);
834 * mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries
835 * @qc: queued command whose SG list to source from
837 * Populate the SG list and mark the last entry.
840 * Inherited from caller.
842 static void mv_fill_sg(struct ata_queued_cmd *qc)
844 struct mv_port_priv *pp = qc->ap->private_data;
846 struct scatterlist *sg;
848 ata_for_each_sg(sg, qc) {
852 addr = sg_dma_address(sg);
853 sg_len = sg_dma_len(sg);
855 pp->sg_tbl[i].addr = cpu_to_le32(addr & 0xffffffff);
856 pp->sg_tbl[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
857 assert(0 == (sg_len & ~MV_DMA_BOUNDARY));
858 pp->sg_tbl[i].flags_size = cpu_to_le32(sg_len);
859 if (ata_sg_is_last(sg, qc))
860 pp->sg_tbl[i].flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
866 static inline unsigned mv_inc_q_index(unsigned *index)
868 *index = (*index + 1) & MV_MAX_Q_DEPTH_MASK;
872 static inline void mv_crqb_pack_cmd(u16 *cmdw, u8 data, u8 addr, unsigned last)
874 *cmdw = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS |
875 (last ? CRQB_CMD_LAST : 0);
879 * mv_qc_prep - Host specific command preparation.
880 * @qc: queued command to prepare
882 * This routine simply redirects to the general purpose routine
883 * if command is not DMA. Else, it handles prep of the CRQB
884 * (command request block), does some sanity checking, and calls
885 * the SG load routine.
888 * Inherited from caller.
890 static void mv_qc_prep(struct ata_queued_cmd *qc)
892 struct ata_port *ap = qc->ap;
893 struct mv_port_priv *pp = ap->private_data;
895 struct ata_taskfile *tf;
898 if (ATA_PROT_DMA != qc->tf.protocol) {
902 /* the req producer index should be the same as we remember it */
903 assert(((readl(mv_ap_base(qc->ap) + EDMA_REQ_Q_IN_PTR_OFS) >>
904 EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
907 /* Fill in command request block
909 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
910 flags |= CRQB_FLAG_READ;
912 assert(MV_MAX_Q_DEPTH > qc->tag);
913 flags |= qc->tag << CRQB_TAG_SHIFT;
915 pp->crqb[pp->req_producer].sg_addr =
916 cpu_to_le32(pp->sg_tbl_dma & 0xffffffff);
917 pp->crqb[pp->req_producer].sg_addr_hi =
918 cpu_to_le32((pp->sg_tbl_dma >> 16) >> 16);
919 pp->crqb[pp->req_producer].ctrl_flags = cpu_to_le16(flags);
921 cw = &pp->crqb[pp->req_producer].ata_cmd[0];
924 /* Sadly, the CRQB cannot accomodate all registers--there are
925 * only 11 bytes...so we must pick and choose required
926 * registers based on the command. So, we drop feature and
927 * hob_feature for [RW] DMA commands, but they are needed for
928 * NCQ. NCQ will drop hob_nsect.
930 switch (tf->command) {
932 case ATA_CMD_READ_EXT:
934 case ATA_CMD_WRITE_EXT:
935 mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0);
937 #ifdef LIBATA_NCQ /* FIXME: remove this line when NCQ added */
938 case ATA_CMD_FPDMA_READ:
939 case ATA_CMD_FPDMA_WRITE:
940 mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0);
941 mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0);
943 #endif /* FIXME: remove this line when NCQ added */
945 /* The only other commands EDMA supports in non-queued and
946 * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none
947 * of which are defined/used by Linux. If we get here, this
950 * FIXME: modify libata to give qc_prep a return value and
956 mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0);
957 mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0);
958 mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0);
959 mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0);
960 mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0);
961 mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0);
962 mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0);
963 mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0);
964 mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1); /* last */
966 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) {
973 * mv_qc_issue - Initiate a command to the host
974 * @qc: queued command to start
976 * This routine simply redirects to the general purpose routine
977 * if command is not DMA. Else, it sanity checks our local
978 * caches of the request producer/consumer indices then enables
979 * DMA and bumps the request producer index.
982 * Inherited from caller.
984 static int mv_qc_issue(struct ata_queued_cmd *qc)
986 void __iomem *port_mmio = mv_ap_base(qc->ap);
987 struct mv_port_priv *pp = qc->ap->private_data;
990 if (ATA_PROT_DMA != qc->tf.protocol) {
991 /* We're about to send a non-EDMA capable command to the
992 * port. Turn off EDMA so there won't be problems accessing
993 * shadow block, etc registers.
996 return ata_qc_issue_prot(qc);
999 in_ptr = readl(port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
1001 /* the req producer index should be the same as we remember it */
1002 assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
1004 /* until we do queuing, the queue should be empty at this point */
1005 assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
1006 ((readl(port_mmio + EDMA_REQ_Q_OUT_PTR_OFS) >>
1007 EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK));
1009 mv_inc_q_index(&pp->req_producer); /* now incr producer index */
1011 mv_start_dma(port_mmio, pp);
1013 /* and write the request in pointer to kick the EDMA to life */
1014 in_ptr &= EDMA_REQ_Q_BASE_LO_MASK;
1015 in_ptr |= pp->req_producer << EDMA_REQ_Q_PTR_SHIFT;
1016 writelfl(in_ptr, port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
1022 * mv_get_crpb_status - get status from most recently completed cmd
1023 * @ap: ATA channel to manipulate
1025 * This routine is for use when the port is in DMA mode, when it
1026 * will be using the CRPB (command response block) method of
1027 * returning command completion information. We assert indices
1028 * are good, grab status, and bump the response consumer index to
1029 * prove that we're up to date.
1032 * Inherited from caller.
1034 static u8 mv_get_crpb_status(struct ata_port *ap)
1036 void __iomem *port_mmio = mv_ap_base(ap);
1037 struct mv_port_priv *pp = ap->private_data;
1040 out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
1042 /* the response consumer index should be the same as we remember it */
1043 assert(((out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
1046 /* increment our consumer index... */
1047 pp->rsp_consumer = mv_inc_q_index(&pp->rsp_consumer);
1049 /* and, until we do NCQ, there should only be 1 CRPB waiting */
1050 assert(((readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) >>
1051 EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
1054 /* write out our inc'd consumer index so EDMA knows we're caught up */
1055 out_ptr &= EDMA_RSP_Q_BASE_LO_MASK;
1056 out_ptr |= pp->rsp_consumer << EDMA_RSP_Q_PTR_SHIFT;
1057 writelfl(out_ptr, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
1059 /* Return ATA status register for completed CRPB */
1060 return (pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT);
1064 * mv_err_intr - Handle error interrupts on the port
1065 * @ap: ATA channel to manipulate
1067 * In most cases, just clear the interrupt and move on. However,
1068 * some cases require an eDMA reset, which is done right before
1069 * the COMRESET in mv_phy_reset(). The SERR case requires a
1070 * clear of pending errors in the SATA SERROR register. Finally,
1071 * if the port disabled DMA, update our cached copy to match.
1074 * Inherited from caller.
1076 static void mv_err_intr(struct ata_port *ap)
1078 void __iomem *port_mmio = mv_ap_base(ap);
1079 u32 edma_err_cause, serr = 0;
1081 edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1083 if (EDMA_ERR_SERR & edma_err_cause) {
1084 serr = scr_read(ap, SCR_ERROR);
1085 scr_write_flush(ap, SCR_ERROR, serr);
1087 if (EDMA_ERR_SELF_DIS & edma_err_cause) {
1088 struct mv_port_priv *pp = ap->private_data;
1089 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1091 DPRINTK(KERN_ERR "ata%u: port error; EDMA err cause: 0x%08x "
1092 "SERR: 0x%08x\n", ap->id, edma_err_cause, serr);
1094 /* Clear EDMA now that SERR cleanup done */
1095 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1097 /* check for fatal here and recover if needed */
1098 if (EDMA_ERR_FATAL & edma_err_cause) {
1104 * mv_host_intr - Handle all interrupts on the given host controller
1105 * @host_set: host specific structure
1106 * @relevant: port error bits relevant to this host controller
1107 * @hc: which host controller we're to look at
1109 * Read then write clear the HC interrupt status then walk each
1110 * port connected to the HC and see if it needs servicing. Port
1111 * success ints are reported in the HC interrupt status reg, the
1112 * port error ints are reported in the higher level main
1113 * interrupt status register and thus are passed in via the
1114 * 'relevant' argument.
1117 * Inherited from caller.
1119 static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
1122 void __iomem *mmio = host_set->mmio_base;
1123 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
1124 struct ata_port *ap;
1125 struct ata_queued_cmd *qc;
1127 int shift, port, port0, hard_port, handled;
1128 unsigned int err_mask;
1134 port0 = MV_PORTS_PER_HC;
1137 /* we'll need the HC success int register in most cases */
1138 hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
1140 writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS);
1143 VPRINTK("ENTER, hc%u relevant=0x%08x HC IRQ cause=0x%08x\n",
1144 hc,relevant,hc_irq_cause);
1146 for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) {
1147 ap = host_set->ports[port];
1148 hard_port = port & MV_PORT_MASK; /* range 0-3 */
1149 handled = 0; /* ensure ata_status is set if handled++ */
1151 if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) {
1152 /* new CRPB on the queue; just one at a time until NCQ
1154 ata_status = mv_get_crpb_status(ap);
1156 } else if ((DEV_IRQ << hard_port) & hc_irq_cause) {
1157 /* received ATA IRQ; read the status reg to clear INTRQ
1159 ata_status = readb((void __iomem *)
1160 ap->ioaddr.status_addr);
1164 err_mask = ac_err_mask(ata_status);
1166 shift = port << 1; /* (port * 2) */
1167 if (port >= MV_PORTS_PER_HC) {
1168 shift++; /* skip bit 8 in the HC Main IRQ reg */
1170 if ((PORT0_ERR << shift) & relevant) {
1172 err_mask |= AC_ERR_OTHER;
1176 if (handled && ap) {
1177 qc = ata_qc_from_tag(ap, ap->active_tag);
1179 VPRINTK("port %u IRQ found for qc, "
1180 "ata_status 0x%x\n", port,ata_status);
1181 /* mark qc status appropriately */
1182 ata_qc_complete(qc, err_mask);
1192 * @dev_instance: private data; in this case the host structure
1195 * Read the read only register to determine if any host
1196 * controllers have pending interrupts. If so, call lower level
1197 * routine to handle. Also check for PCI errors which are only
1201 * This routine holds the host_set lock while processing pending
1204 static irqreturn_t mv_interrupt(int irq, void *dev_instance,
1205 struct pt_regs *regs)
1207 struct ata_host_set *host_set = dev_instance;
1208 unsigned int hc, handled = 0, n_hcs;
1209 void __iomem *mmio = host_set->mmio_base;
1212 irq_stat = readl(mmio + HC_MAIN_IRQ_CAUSE_OFS);
1214 /* check the cases where we either have nothing pending or have read
1215 * a bogus register value which can indicate HW removal or PCI fault
1217 if (!irq_stat || (0xffffffffU == irq_stat)) {
1221 n_hcs = mv_get_hc_count(host_set->ports[0]->flags);
1222 spin_lock(&host_set->lock);
1224 for (hc = 0; hc < n_hcs; hc++) {
1225 u32 relevant = irq_stat & (HC0_IRQ_PEND << (hc * HC_SHIFT));
1227 mv_host_intr(host_set, relevant, hc);
1231 if (PCI_ERR & irq_stat) {
1232 printk(KERN_ERR DRV_NAME ": PCI ERROR; PCI IRQ cause=0x%08x\n",
1233 readl(mmio + PCI_IRQ_CAUSE_OFS));
1235 DPRINTK("All regs @ PCI error\n");
1236 mv_dump_all_regs(mmio, -1, to_pci_dev(host_set->dev));
1238 writelfl(0, mmio + PCI_IRQ_CAUSE_OFS);
1241 spin_unlock(&host_set->lock);
1243 return IRQ_RETVAL(handled);
1246 static void mv_phy_errata5(struct ata_port *ap)
1251 static void mv_phy_errata6(struct ata_port *ap)
1253 struct mv_host_priv *hpriv = ap->host_set->private_data;
1254 u32 hp_flags = hpriv->hp_flags;
1255 void __iomem *port_mmio = mv_ap_base(ap);
1257 hp_flags & (MV_HP_ERRATA_60X1A1 | MV_HP_ERRATA_60X1B0);
1260 if (fix_phy_mode4) {
1263 m4 = readl(port_mmio + PHY_MODE4);
1264 tmp = readl(port_mmio + 0x310);
1266 m4 = (m4 & ~(1 << 1)) | (1 << 0);
1268 writel(m4, port_mmio + PHY_MODE4);
1269 writel(tmp, port_mmio + 0x310);
1272 /* Revert values of pre-emphasis and signal amps to the saved ones */
1273 m2 = readl(port_mmio + PHY_MODE2);
1275 m2 &= ~MV_M2_PREAMP_MASK;
1276 m2 |= hpriv->signal[ap->port_no].amps;
1277 m2 |= hpriv->signal[ap->port_no].pre;
1279 writel(m2, port_mmio + PHY_MODE2);
1282 static void mv_phy_errata(struct ata_port *ap)
1284 struct mv_host_priv *hpriv = ap->host_set->private_data;
1293 * mv_phy_reset - Perform eDMA reset followed by COMRESET
1294 * @ap: ATA channel to manipulate
1296 * Part of this is taken from __sata_phy_reset and modified to
1297 * not sleep since this routine gets called from interrupt level.
1300 * Inherited from caller. This is coded to safe to call at
1301 * interrupt level, i.e. it does not sleep.
1303 static void mv_phy_reset(struct ata_port *ap)
1305 struct mv_port_priv *pp = ap->private_data;
1306 struct mv_host_priv *hpriv = ap->host_set->private_data;
1307 void __iomem *port_mmio = mv_ap_base(ap);
1308 struct ata_taskfile tf;
1309 struct ata_device *dev = &ap->device[0];
1310 unsigned long timeout;
1312 VPRINTK("ENTER, port %u, mmio 0x%p\n", ap->port_no, port_mmio);
1316 writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS);
1318 if (IS_60XX(hpriv)) {
1319 u32 ifctl = readl(port_mmio + SATA_INTERFACE_CTL);
1320 ifctl |= (1 << 12) | (1 << 7);
1321 writelfl(ifctl, port_mmio + SATA_INTERFACE_CTL);
1324 udelay(25); /* allow reset propagation */
1326 /* Spec never mentions clearing the bit. Marvell's driver does
1327 * clear the bit, however.
1329 writelfl(0, port_mmio + EDMA_CMD_OFS);
1333 DPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x "
1334 "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
1335 mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
1337 /* proceed to init communications via the scr_control reg */
1338 scr_write_flush(ap, SCR_CONTROL, 0x301);
1340 scr_write_flush(ap, SCR_CONTROL, 0x300);
1341 timeout = jiffies + (HZ * 1);
1344 if ((scr_read(ap, SCR_STATUS) & 0xf) != 1)
1346 } while (time_before(jiffies, timeout));
1348 mv_scr_write(ap, SCR_ERROR, mv_scr_read(ap, SCR_ERROR));
1350 DPRINTK("S-regs after PHY wake: SStat 0x%08x SErr 0x%08x "
1351 "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
1352 mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
1354 if (sata_dev_present(ap)) {
1357 printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n",
1358 ap->id, scr_read(ap, SCR_STATUS));
1359 ata_port_disable(ap);
1362 ap->cbl = ATA_CBL_SATA;
1364 tf.lbah = readb((void __iomem *) ap->ioaddr.lbah_addr);
1365 tf.lbam = readb((void __iomem *) ap->ioaddr.lbam_addr);
1366 tf.lbal = readb((void __iomem *) ap->ioaddr.lbal_addr);
1367 tf.nsect = readb((void __iomem *) ap->ioaddr.nsect_addr);
1369 dev->class = ata_dev_classify(&tf);
1370 if (!ata_dev_present(dev)) {
1371 VPRINTK("Port disabled post-sig: No device present.\n");
1372 ata_port_disable(ap);
1375 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1377 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1383 * mv_eng_timeout - Routine called by libata when SCSI times out I/O
1384 * @ap: ATA channel to manipulate
1386 * Intent is to clear all pending error conditions, reset the
1387 * chip/bus, fail the command, and move on.
1390 * This routine holds the host_set lock while failing the command.
1392 static void mv_eng_timeout(struct ata_port *ap)
1394 struct ata_queued_cmd *qc;
1395 unsigned long flags;
1397 printk(KERN_ERR "ata%u: Entering mv_eng_timeout\n",ap->id);
1398 DPRINTK("All regs @ start of eng_timeout\n");
1399 mv_dump_all_regs(ap->host_set->mmio_base, ap->port_no,
1400 to_pci_dev(ap->host_set->dev));
1402 qc = ata_qc_from_tag(ap, ap->active_tag);
1403 printk(KERN_ERR "mmio_base %p ap %p qc %p scsi_cmnd %p &cmnd %p\n",
1404 ap->host_set->mmio_base, ap, qc, qc->scsicmd,
1405 &qc->scsicmd->cmnd);
1411 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
1414 /* hack alert! We cannot use the supplied completion
1415 * function from inside the ->eh_strategy_handler() thread.
1416 * libata is the only user of ->eh_strategy_handler() in
1417 * any kernel, so the default scsi_done() assumes it is
1418 * not being called from the SCSI EH.
1420 spin_lock_irqsave(&ap->host_set->lock, flags);
1421 qc->scsidone = scsi_finish_command;
1422 ata_qc_complete(qc, AC_ERR_OTHER);
1423 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1428 * mv_port_init - Perform some early initialization on a single port.
1429 * @port: libata data structure storing shadow register addresses
1430 * @port_mmio: base address of the port
1432 * Initialize shadow register mmio addresses, clear outstanding
1433 * interrupts on the port, and unmask interrupts for the future
1434 * start of the port.
1437 * Inherited from caller.
1439 static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio)
1441 unsigned long shd_base = (unsigned long) port_mmio + SHD_BLK_OFS;
1444 /* PIO related setup
1446 port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA);
1448 port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR);
1449 port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT);
1450 port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL);
1451 port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM);
1452 port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH);
1453 port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE);
1455 port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS);
1456 /* special case: control/altstatus doesn't have ATA_REG_ address */
1457 port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST_OFS;
1460 port->cmd_addr = port->bmdma_addr = port->scr_addr = 0;
1462 /* Clear any currently outstanding port interrupt conditions */
1463 serr_ofs = mv_scr_offset(SCR_ERROR);
1464 writelfl(readl(port_mmio + serr_ofs), port_mmio + serr_ofs);
1465 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1467 /* unmask all EDMA error interrupts */
1468 writelfl(~0, port_mmio + EDMA_ERR_IRQ_MASK_OFS);
1470 VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n",
1471 readl(port_mmio + EDMA_CFG_OFS),
1472 readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS),
1473 readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS));
1476 static void mv_enable_leds5(struct mv_host_priv *hpriv, void __iomem *mmio)
1481 static void mv_enable_leds6(struct mv_host_priv *hpriv, void __iomem *mmio)
1483 if (hpriv->hp_flags & MV_HP_ERRATA_60X1A1)
1484 writel(0x00020060, mmio + MV_GPIO_PORT_CTL);
1486 else if (hpriv->hp_flags & MV_HP_ERRATA_60X1B0)
1487 writel(0x00000060, mmio + MV_GPIO_PORT_CTL);
1490 static void mv_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
1493 mv_enable_leds5(hpriv, mmio);
1495 mv_enable_leds6(hpriv, mmio);
1498 static void mv_cfg_signal5(struct mv_host_priv *hpriv, int idx,
1504 static void mv_cfg_signal6(struct mv_host_priv *hpriv, int idx,
1507 void __iomem *port_mmio;
1510 if (hpriv->hp_flags & MV_HP_ERRATA_60X1A1) {
1511 hpriv->signal[idx].amps = 0x5 << 8;
1512 hpriv->signal[idx].pre = 0x3 << 5;
1516 assert (hpriv->hp_flags & MV_HP_ERRATA_60X1B0);
1518 tmp = readl(mmio + MV_RESET_CFG);
1519 if ((tmp & (1 << 0)) == 0) {
1520 hpriv->signal[idx].amps = 0x4 << 8;
1521 hpriv->signal[idx].pre = 0x1 << 5;
1525 port_mmio = mv_port_base(mmio, idx);
1526 tmp = readl(port_mmio + PHY_MODE2);
1528 hpriv->signal[idx].amps = tmp & 0x700; /* bits 10:8 */
1529 hpriv->signal[idx].pre = tmp & 0xe0; /* bits 7:5 */
1532 static int mv_cfg_errata(struct pci_dev *pdev, struct mv_host_priv *hpriv,
1533 unsigned int board_idx)
1536 u32 hp_flags = hpriv->hp_flags;
1538 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
1543 hp_flags |= MV_HP_50XX;
1545 if (pdev->device == 0x5080) {
1548 dev_printk(KERN_WARNING, &pdev->dev,
1549 "Applying B0 workarounds to unknown rev 0\n");
1552 hp_flags |= MV_HP_ERRATA_50XXB0;
1555 hp_flags |= MV_HP_ERRATA_50XXB1;
1558 hp_flags |= MV_HP_ERRATA_50XXB2;
1561 dev_printk(KERN_WARNING, &pdev->dev,
1562 "Applying B2 workarounds to future rev\n");
1563 hp_flags |= MV_HP_ERRATA_50XXB2;
1569 hp_flags |= MV_HP_ERRATA_50XXB0;
1572 dev_printk(KERN_WARNING, &pdev->dev,
1573 "Applying B1 workarounds to unknown rev 1\n");
1576 hp_flags |= MV_HP_ERRATA_50XXB1;
1579 dev_printk(KERN_WARNING, &pdev->dev,
1580 "Applying B2 workarounds to future rev\n");
1583 hp_flags |= MV_HP_ERRATA_50XXB2;
1593 dev_printk(KERN_WARNING, &pdev->dev,
1594 "Applying A1 workarounds to unknown rev 0\n");
1597 hp_flags |= MV_HP_ERRATA_60X1A1;
1600 dev_printk(KERN_WARNING, &pdev->dev,
1601 "Applying B0 workarounds to future rev\n");
1604 hp_flags |= MV_HP_ERRATA_60X1B0;
1610 printk(KERN_ERR DRV_NAME ": BUG: invalid board index %u\n", board_idx);
1614 hpriv->hp_flags = hp_flags;
1620 * mv_host_init - Perform some early initialization of the host.
1621 * @pdev: host PCI device
1622 * @probe_ent: early data struct representing the host
1624 * If possible, do an early global reset of the host. Then do
1625 * our port init and clear/unmask all/relevant host interrupts.
1628 * Inherited from caller.
1630 static int mv_host_init(struct pci_dev *pdev, struct ata_probe_ent *probe_ent,
1631 unsigned int board_idx)
1633 int rc = 0, n_hc, port, hc;
1634 void __iomem *mmio = probe_ent->mmio_base;
1635 void __iomem *port_mmio;
1636 struct mv_host_priv *hpriv = probe_ent->private_data;
1638 rc = mv_cfg_errata(pdev, hpriv, board_idx);
1642 n_hc = mv_get_hc_count(probe_ent->host_flags);
1643 probe_ent->n_ports = MV_PORTS_PER_HC * n_hc;
1645 if (IS_50XX(hpriv)) {
1646 for (port = 0; port < probe_ent->n_ports; port++)
1647 mv_cfg_signal5(hpriv, port, mmio);
1649 for (port = 0; port < probe_ent->n_ports; port++)
1650 mv_cfg_signal6(hpriv, port, mmio);
1653 if ((MV_FLAG_GLBL_SFT_RST & probe_ent->host_flags) &&
1654 mv_global_soft_reset(probe_ent->mmio_base)) {
1659 mv_enable_leds(hpriv, mmio);
1661 for (port = 0; port < probe_ent->n_ports; port++) {
1662 port_mmio = mv_port_base(mmio, port);
1663 mv_port_init(&probe_ent->port[port], port_mmio);
1666 for (hc = 0; hc < n_hc; hc++) {
1667 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
1669 VPRINTK("HC%i: HC config=0x%08x HC IRQ cause "
1670 "(before clear)=0x%08x\n", hc,
1671 readl(hc_mmio + HC_CFG_OFS),
1672 readl(hc_mmio + HC_IRQ_CAUSE_OFS));
1674 /* Clear any currently outstanding hc interrupt conditions */
1675 writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS);
1678 /* Clear any currently outstanding host interrupt conditions */
1679 writelfl(0, mmio + PCI_IRQ_CAUSE_OFS);
1681 /* and unmask interrupt generation for host regs */
1682 writelfl(PCI_UNMASK_ALL_IRQS, mmio + PCI_IRQ_MASK_OFS);
1683 writelfl(~HC_MAIN_MASKED_IRQS, mmio + HC_MAIN_IRQ_MASK_OFS);
1685 VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x "
1686 "PCI int cause/mask=0x%08x/0x%08x\n",
1687 readl(mmio + HC_MAIN_IRQ_CAUSE_OFS),
1688 readl(mmio + HC_MAIN_IRQ_MASK_OFS),
1689 readl(mmio + PCI_IRQ_CAUSE_OFS),
1690 readl(mmio + PCI_IRQ_MASK_OFS));
1697 * mv_print_info - Dump key info to kernel log for perusal.
1698 * @probe_ent: early data struct representing the host
1700 * FIXME: complete this.
1703 * Inherited from caller.
1705 static void mv_print_info(struct ata_probe_ent *probe_ent)
1707 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1708 struct mv_host_priv *hpriv = probe_ent->private_data;
1712 /* Use this to determine the HW stepping of the chip so we know
1713 * what errata to workaround
1715 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
1717 pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc);
1720 else if (scc == 0x01)
1725 dev_printk(KERN_INFO, &pdev->dev,
1726 "%u slots %u ports %s mode IRQ via %s\n",
1727 (unsigned)MV_MAX_Q_DEPTH, probe_ent->n_ports,
1728 scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx");
1732 * mv_init_one - handle a positive probe of a Marvell host
1733 * @pdev: PCI device found
1734 * @ent: PCI device ID entry for the matched host
1737 * Inherited from caller.
1739 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1741 static int printed_version = 0;
1742 struct ata_probe_ent *probe_ent = NULL;
1743 struct mv_host_priv *hpriv;
1744 unsigned int board_idx = (unsigned int)ent->driver_data;
1745 void __iomem *mmio_base;
1746 int pci_dev_busy = 0, rc;
1748 if (!printed_version++)
1749 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
1751 rc = pci_enable_device(pdev);
1756 rc = pci_request_regions(pdev, DRV_NAME);
1762 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1763 if (probe_ent == NULL) {
1765 goto err_out_regions;
1768 memset(probe_ent, 0, sizeof(*probe_ent));
1769 probe_ent->dev = pci_dev_to_dev(pdev);
1770 INIT_LIST_HEAD(&probe_ent->node);
1772 mmio_base = pci_iomap(pdev, MV_PRIMARY_BAR, 0);
1773 if (mmio_base == NULL) {
1775 goto err_out_free_ent;
1778 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1781 goto err_out_iounmap;
1783 memset(hpriv, 0, sizeof(*hpriv));
1785 probe_ent->sht = mv_port_info[board_idx].sht;
1786 probe_ent->host_flags = mv_port_info[board_idx].host_flags;
1787 probe_ent->pio_mask = mv_port_info[board_idx].pio_mask;
1788 probe_ent->udma_mask = mv_port_info[board_idx].udma_mask;
1789 probe_ent->port_ops = mv_port_info[board_idx].port_ops;
1791 probe_ent->irq = pdev->irq;
1792 probe_ent->irq_flags = SA_SHIRQ;
1793 probe_ent->mmio_base = mmio_base;
1794 probe_ent->private_data = hpriv;
1796 /* initialize adapter */
1797 rc = mv_host_init(pdev, probe_ent, board_idx);
1802 /* Enable interrupts */
1803 if (pci_enable_msi(pdev) == 0) {
1804 hpriv->hp_flags |= MV_HP_FLAG_MSI;
1809 mv_dump_pci_cfg(pdev, 0x68);
1810 mv_print_info(probe_ent);
1812 if (ata_device_add(probe_ent) == 0) {
1813 rc = -ENODEV; /* No devices discovered */
1814 goto err_out_dev_add;
1821 if (MV_HP_FLAG_MSI & hpriv->hp_flags) {
1822 pci_disable_msi(pdev);
1829 pci_iounmap(pdev, mmio_base);
1833 pci_release_regions(pdev);
1835 if (!pci_dev_busy) {
1836 pci_disable_device(pdev);
1842 static int __init mv_init(void)
1844 return pci_module_init(&mv_pci_driver);
1847 static void __exit mv_exit(void)
1849 pci_unregister_driver(&mv_pci_driver);
1852 MODULE_AUTHOR("Brett Russ");
1853 MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers");
1854 MODULE_LICENSE("GPL");
1855 MODULE_DEVICE_TABLE(pci, mv_pci_tbl);
1856 MODULE_VERSION(DRV_VERSION);
1858 module_init(mv_init);
1859 module_exit(mv_exit);